/* roulang page: index */
:root {
            --primary: #3B82C4;
            --primary-hover: #2F6FA8;
            --primary-light: #EBF2FA;
            --secondary-dark: #1E3A5F;
            --secondary-green: #2E7D32;
            --secondary-orange: #E67E22;
            --bg-white: #FFFFFF;
            --bg-light: #F6F9FC;
            --bg-footer: #1A2B3C;
            --text-primary: #1F2937;
            --text-secondary: #4B5563;
            --text-muted: #6B7280;
            --text-light: #9CA3AF;
            --border: #E5E7EB;
            --border-light: #D1D5DB;
            --radius-card: 12px;
            --radius-btn: 7px;
            --radius-input: 6px;
            --shadow-card: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-card-hover: 0 6px 18px rgba(0,0,0,0.10);
            --shadow-btn: 0 2px 6px rgba(59,130,196,0.25);
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s cubic-bezier(0.4,0,0.2,1);
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: 'PingFang SC','Microsoft YaHei','Noto Sans SC',sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-primary);
            background-color: var(--bg-white);
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--primary-hover);
            text-decoration: none;
        }
        a:focus,
        button:focus,
        input:focus,
        select:focus,
        textarea:focus {
            outline: 2px solid rgba(59,130,196,0.5);
            outline-offset: 2px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }
        .section-padding {
            padding-top: 80px;
            padding-bottom: 80px;
        }
        .section-padding-sm {
            padding-top: 60px;
            padding-bottom: 60px;
        }
        .section-bg-alt {
            background-color: var(--bg-light);
        }
        .section-title {
            font-size: 26px;
            font-weight: 600;
            color: var(--secondary-dark);
            line-height: 1.4;
            margin-bottom: 16px;
            letter-spacing: 0.01em;
        }
        .section-title.text-white {
            color: #fff;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 32px;
            max-width: 720px;
        }
        .section-subtitle.text-light-muted {
            color: rgba(255,255,255,0.75);
        }
        .card-base {
            background: var(--bg-white);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 24px;
            transition: box-shadow var(--transition-smooth), transform var(--transition-smooth);
            border: 1px solid var(--border);
            height: 100%;
        }
        .card-base:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background-color: var(--primary);
            color: #fff !important;
            font-weight: 600;
            font-size: 15px;
            padding: 12px 24px;
            border-radius: var(--radius-btn);
            border: none;
            cursor: pointer;
            transition: background-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
            box-shadow: var(--shadow-btn);
            text-decoration: none;
            line-height: 1.4;
            white-space: nowrap;
        }
        .btn-primary-custom:hover {
            background-color: var(--primary-hover);
            box-shadow: 0 4px 14px rgba(59,130,196,0.35);
            transform: translateY(-1px);
            color: #fff !important;
        }
        .btn-secondary-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--primary);
            font-weight: 600;
            font-size: 15px;
            padding: 11px 22px;
            border-radius: var(--radius-btn);
            border: 2px solid var(--primary);
            cursor: pointer;
            transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
            text-decoration: none;
            line-height: 1.4;
            white-space: nowrap;
        }
        .btn-secondary-custom:hover {
            background-color: var(--primary-light);
            border-color: var(--primary-hover);
            color: var(--primary-hover);
            transform: translateY(-1px);
        }
        .btn-white-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: #fff;
            font-weight: 600;
            font-size: 15px;
            padding: 11px 22px;
            border-radius: var(--radius-btn);
            border: 2px solid rgba(255,255,255,0.6);
            cursor: pointer;
            transition: background-color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
            text-decoration: none;
            line-height: 1.4;
            white-space: nowrap;
        }
        .btn-white-outline:hover {
            background-color: rgba(255,255,255,0.12);
            border-color: #fff;
            color: #fff;
            transform: translateY(-1px);
        }
        .tag-badge {
            display: inline-block;
            font-size: 12px;
            font-weight: 500;
            color: var(--primary);
            background-color: var(--primary-light);
            padding: 4px 10px;
            border-radius: 20px;
            letter-spacing: 0.02em;
        }
        .tag-badge-green {
            color: var(--secondary-green);
            background: rgba(46,125,50,0.1);
        }
        .tag-badge-orange {
            color: var(--secondary-orange);
            background: rgba(230,126,34,0.1);
        }
        .tag-badge-gray {
            color: var(--text-muted);
            background: #F3F4F6;
        }
        .divider-light {
            border-top: 1px solid var(--border);
            margin: 24px 0;
        }
        .text-accent-green {
            color: var(--secondary-green);
            font-weight: 700;
        }
        .text-accent-orange {
            color: var(--secondary-orange);
            font-weight: 700;
        }
        /* Header / Navigation */
        .site-header {
            background: #fff;
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 1px 4px rgba(0,0,0,0.04);
        }
        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            min-height: 64px;
            padding-top: 8px;
            padding-bottom: 8px;
            gap: 8px 16px;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 18px;
            font-weight: 700;
            color: var(--secondary-dark);
            white-space: nowrap;
            text-decoration: none;
            line-height: 1.3;
        }
        .nav-logo:hover {
            color: var(--primary);
            text-decoration: none;
        }
        .nav-logo i {
            color: var(--primary);
            font-size: 22px;
            flex-shrink: 0;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            margin: 0;
            padding: 0;
            flex-wrap: wrap;
            justify-content: center;
        }
        .nav-links li a {
            display: block;
            padding: 8px 12px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 6px;
            text-decoration: none;
            transition: color var(--transition-fast), background-color var(--transition-fast);
            letter-spacing: 0.01em;
            white-space: nowrap;
        }
        .nav-links li a:hover {
            color: var(--primary);
            background-color: var(--bg-light);
        }
        .nav-links li a.active {
            color: var(--primary);
            border-bottom: 2px solid var(--primary);
            border-radius: 6px 6px 0 0;
            font-weight: 600;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .nav-search {
            display: flex;
            align-items: center;
            gap: 4px;
            background: var(--bg-light);
            border: 1px solid var(--border);
            border-radius: var(--radius-input);
            padding: 6px 10px;
            min-width: 180px;
            max-width: 220px;
            transition: border-color var(--transition-fast);
        }
        .nav-search:focus-within {
            border-color: var(--primary);
        }
        .nav-search input {
            border: none;
            background: transparent;
            font-size: 13px;
            color: var(--text-primary);
            padding: 4px;
            width: 100%;
            outline: none;
            font-family: inherit;
        }
        .nav-search input::placeholder {
            color: var(--text-muted);
            font-size: 13px;
        }
        .nav-search i {
            color: var(--text-muted);
            font-size: 13px;
        }
        .btn-login-nav {
            display: inline-flex;
            align-items: center;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            background: transparent;
            border: 1px solid var(--border-light);
            padding: 7px 14px;
            border-radius: var(--radius-btn);
            cursor: pointer;
            transition: background-color var(--transition-fast), border-color var(--transition-fast);
            text-decoration: none;
            white-space: nowrap;
        }
        .btn-login-nav:hover {
            background-color: var(--bg-light);
            border-color: var(--text-muted);
            color: var(--text-primary);
            text-decoration: none;
        }
        .btn-nav-start {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            background-color: var(--primary);
            padding: 8px 16px;
            border-radius: var(--radius-btn);
            border: none;
            cursor: pointer;
            transition: background-color var(--transition-fast), box-shadow var(--transition-fast);
            text-decoration: none;
            white-space: nowrap;
        }
        .btn-nav-start:hover {
            background-color: var(--primary-hover);
            color: #fff;
            text-decoration: none;
            box-shadow: 0 3px 10px rgba(59,130,196,0.3);
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: 1px solid var(--border);
            border-radius: 6px;
            padding: 8px 10px;
            cursor: pointer;
        }
        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--secondary-dark);
            border-radius: 2px;
            transition: transform var(--transition-fast), opacity var(--transition-fast);
        }
        .nav-toggle.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }
        .mobile-menu {
            display: none;
            flex-direction: column;
            width: 100%;
            padding: 16px 0;
            gap: 8px;
            border-top: 1px solid var(--border);
        }
        .mobile-menu.open {
            display: flex;
        }
        .mobile-menu .nav-search {
            min-width: 100%;
            max-width: 100%;
        }
        .mobile-menu .nav-links {
            flex-direction: column;
            align-items: flex-start;
            gap: 0;
        }
        .mobile-menu .nav-links li {
            width: 100%;
        }
        .mobile-menu .nav-links li a {
            display: block;
            padding: 10px 0;
            font-size: 15px;
            border-bottom: 1px solid var(--bg-light);
        }
        /* Hero Section */
        .hero-section {
            background-color: var(--secondary-dark);
            background-image: linear-gradient(rgba(30,58,95,0.85), rgba(30,58,95,0.92)), url('/assets/images/4bf5290802b6ced9.webp');
            background-size: cover;
            background-position: center;
            padding-top: 90px;
            padding-bottom: 90px;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .hero-section::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--secondary-green), var(--secondary-orange), var(--primary));
            opacity: 0.7;
        }
        .hero-content {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 40px;
        }
        .hero-text {
            flex: 1 1 520px;
            min-width: 0;
        }
        .hero-text h1 {
            font-size: 38px;
            font-weight: 700;
            line-height: 1.3;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.01em;
        }
        .hero-text .hero-subtitle {
            font-size: 20px;
            font-weight: 500;
            color: rgba(255,255,255,0.85);
            margin-bottom: 20px;
            line-height: 1.5;
        }
        .hero-text p {
            font-size: 16px;
            color: rgba(255,255,255,0.7);
            line-height: 1.75;
            margin-bottom: 28px;
            max-width: 600px;
        }
        .hero-cta-group {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }
        .hero-panel {
            flex: 1 1 320px;
            min-width: 280px;
            background: rgba(255,255,255,0.08);
            backdrop-filter: blur(4px);
            border: 1px solid rgba(255,255,255,0.15);
            border-radius: var(--radius-card);
            padding: 24px;
        }
        .hero-panel-title {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .hero-panel-title i {
            color: var(--secondary-green);
            font-size: 18px;
        }
        .hero-rank-item {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 10px 0;
            border-bottom: 1px solid rgba(255,255,255,0.1);
            font-size: 14px;
        }
        .hero-rank-item:last-child {
            border-bottom: none;
        }
        .hero-rank-item .rank-name {
            color: rgba(255,255,255,0.8);
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .hero-rank-item .rank-val {
            color: #fff;
            font-weight: 700;
            font-size: 15px;
        }
        .hero-rank-item .rank-val.green {
            color: #4CAF50;
        }
        .hero-rank-item .rank-val.orange {
            color: #FFB74D;
        }
        /* Trust indicator bar */
        .trust-bar {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border);
        }
        .trust-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            padding-top: 28px;
            padding-bottom: 28px;
        }
        .trust-item {
            text-align: center;
            padding: 8px 4px;
        }
        .trust-item .trust-num {
            font-size: 32px;
            font-weight: 700;
            color: var(--secondary-dark);
            line-height: 1.2;
            letter-spacing: 0.01em;
        }
        .trust-item .trust-num span {
            font-size: 18px;
            color: var(--primary);
        }
        .trust-item .trust-label {
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 6px;
            font-weight: 500;
        }
        /* Brand intro */
        .brand-intro-card {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 36px;
            box-shadow: var(--shadow-card);
            max-width: 900px;
            margin: 0 auto;
        }
        .brand-intro-card p {
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-secondary);
            margin-bottom: 16px;
        }
        .brand-intro-card p:last-child {
            margin-bottom: 0;
        }
        /* Capability cards */
        .capability-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 20px;
        }
        .capability-card {
            background: var(--bg-white);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: box-shadow var(--transition-smooth), transform var(--transition-smooth);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .capability-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .capability-card .card-img {
            height: 160px;
            background-size: cover;
            background-position: center;
            flex-shrink: 0;
        }
        .capability-card .card-body {
            padding: 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .capability-card .card-body h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--secondary-dark);
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .capability-card .card-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            flex: 1;
        }
        /* Steps */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }
        .step-item {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 24px 20px;
            box-shadow: var(--shadow-card);
            text-align: center;
            transition: box-shadow var(--transition-smooth), transform var(--transition-smooth);
            height: 100%;
            position: relative;
        }
        .step-item:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 14px;
        }
        .step-item h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--secondary-dark);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .step-item p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.65;
        }
        .step-arrow {
            position: absolute;
            top: 50%;
            right: -16px;
            transform: translateY(-50%);
            color: var(--primary);
            font-size: 20px;
            z-index: 2;
        }
        /* Calculator preview */
        .calc-preview-card {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 28px;
            max-width: 560px;
            margin: 0 auto;
        }
        .calc-preview-card .calc-input-group {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            margin-bottom: 12px;
        }
        .calc-preview-card .calc-input {
            flex: 1 1 120px;
        }
        .calc-preview-card .calc-input label {
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            margin-bottom: 4px;
            display: block;
        }
        .calc-preview-card .calc-input input,
        .calc-preview-card .calc-input select {
            width: 100%;
            padding: 10px 12px;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-input);
            font-size: 14px;
            font-family: inherit;
            color: var(--text-primary);
            background: var(--bg-white);
            transition: border-color var(--transition-fast);
        }
        .calc-preview-card .calc-input input:focus,
        .calc-preview-card .calc-input select:focus {
            border-color: var(--primary);
            outline: none;
        }
        .calc-btn-row {
            display: flex;
            gap: 10px;
            margin: 16px 0;
            flex-wrap: wrap;
        }
        .calc-btn-option {
            padding: 8px 16px;
            border: 1px solid var(--border);
            border-radius: var(--radius-btn);
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--bg-white);
            cursor: pointer;
            transition: all var(--transition-fast);
            font-family: inherit;
        }
        .calc-btn-option:hover,
        .calc-btn-option.active {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-light);
        }
        .calc-result-bar-row {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 10px;
            font-size: 13px;
        }
        .calc-result-bar-row .bar-label {
            width: 36px;
            font-weight: 600;
            color: var(--secondary-dark);
            flex-shrink: 0;
        }
        .calc-result-bar-row .bar-track {
            flex: 1;
            height: 10px;
            background: var(--bg-light);
            border-radius: 10px;
            overflow: hidden;
        }
        .calc-result-bar-row .bar-fill {
            height: 100%;
            border-radius: 10px;
            transition: width 0.6s ease;
        }
        .calc-result-bar-row .bar-fill.win {
            background: var(--primary);
        }
        .calc-result-bar-row .bar-fill.draw {
            background: var(--secondary-green);
        }
        .calc-result-bar-row .bar-fill.lose {
            background: var(--secondary-orange);
        }
        .calc-result-bar-row .bar-pct {
            width: 48px;
            text-align: right;
            font-weight: 600;
            color: var(--text-primary);
            flex-shrink: 0;
        }
        /* Comparison cards */
        .comparison-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .comparison-card {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 24px;
            box-shadow: var(--shadow-card);
            text-align: center;
            height: 100%;
            transition: box-shadow var(--transition-smooth), transform var(--transition-smooth);
        }
        .comparison-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .comparison-card h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--secondary-dark);
            margin-bottom: 16px;
            line-height: 1.4;
        }
        .comparison-row {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 10px 0;
            border-bottom: 1px solid var(--bg-light);
            font-size: 14px;
        }
        .comparison-row:last-child {
            border-bottom: none;
        }
        .comparison-row .comp-label {
            color: var(--text-muted);
            font-weight: 500;
        }
        .comparison-row .comp-before {
            color: var(--text-light);
            text-decoration: line-through;
            font-weight: 400;
        }
        .comparison-row .comp-after {
            color: var(--secondary-green);
            font-weight: 700;
        }
        .comparison-badge {
            display: inline-block;
            background: rgba(46,125,50,0.1);
            color: var(--secondary-green);
            font-size: 13px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 20px;
            margin-bottom: 14px;
        }
        /* Testimonials */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
        }
        .testimonial-card {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 22px;
            box-shadow: var(--shadow-card);
            height: 100%;
            transition: box-shadow var(--transition-smooth), transform var(--transition-smooth);
        }
        .testimonial-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .testimonial-head {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 12px;
        }
        .testimonial-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-weight: 700;
            font-size: 18px;
            flex-shrink: 0;
        }
        .testimonial-info .testimonial-name {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.3;
        }
        .testimonial-info .testimonial-tag {
            font-size: 12px;
            color: var(--text-muted);
        }
        .testimonial-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }
        /* Scenario cards */
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
        }
        .scenario-card {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 22px;
            box-shadow: var(--shadow-card);
            text-align: center;
            height: 100%;
            transition: box-shadow var(--transition-smooth), transform var(--transition-smooth);
        }
        .scenario-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .scenario-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 22px;
            margin-bottom: 14px;
        }
        .scenario-card h3 {
            font-size: 15px;
            font-weight: 600;
            color: var(--secondary-dark);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .scenario-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.65;
            margin: 0;
        }
        /* Stats panel */
        .stats-panel {
            background: var(--secondary-dark);
            border-radius: var(--radius-card);
            padding: 36px;
            display: flex;
            flex-wrap: wrap;
            gap: 30px;
            align-items: center;
            justify-content: space-between;
        }
        .stats-big-num {
            flex: 1 1 200px;
            min-width: 160px;
            text-align: center;
            padding: 10px;
        }
        .stats-big-num .stat-value {
            font-size: 42px;
            font-weight: 700;
            color: #fff;
            line-height: 1.2;
            letter-spacing: 0.01em;
        }
        .stats-big-num .stat-value span {
            font-size: 20px;
            color: var(--primary);
        }
        .stats-big-num .stat-label {
            font-size: 13px;
            color: rgba(255,255,255,0.6);
            margin-top: 6px;
            font-weight: 500;
        }
        .stats-chart {
            flex: 1 1 260px;
            min-width: 220px;
            background: rgba(255,255,255,0.06);
            border-radius: var(--radius-card);
            padding: 20px;
            border: 1px solid rgba(255,255,255,0.1);
        }
        .stats-chart-title {
            font-size: 13px;
            color: rgba(255,255,255,0.65);
            margin-bottom: 14px;
            font-weight: 500;
            letter-spacing: 0.02em;
        }
        .chart-bar-group {
            display: flex;
            gap: 6px;
            align-items: flex-end;
            height: 80px;
            margin-bottom: 8px;
        }
        .chart-bar {
            flex: 1;
            background: var(--primary);
            border-radius: 4px 4px 0 0;
            height: 100%;
            transition: height 0.6s ease;
            opacity: 0.85;
        }
        .chart-bar.bar-green {
            background: var(--secondary-green);
        }
        .chart-bar.bar-orange {
            background: var(--secondary-orange);
        }
        .chart-bar-label {
            font-size: 11px;
            color: rgba(255,255,255,0.55);
            text-align: center;
            margin-top: 4px;
        }
        /* News list */
        .news-list {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .news-list-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 16px 20px;
            box-shadow: var(--shadow-card);
            transition: box-shadow var(--transition-smooth), transform var(--transition-smooth);
        }
        .news-list-item:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-1px);
        }
        .news-list-item .news-date {
            font-size: 12px;
            color: var(--text-light);
            white-space: nowrap;
            flex-shrink: 0;
            padding-top: 2px;
            min-width: 90px;
            text-align: right;
        }
        .news-list-item .news-content {
            flex: 1;
            min-width: 0;
        }
        .news-list-item .news-content h3 {
            font-size: 15px;
            font-weight: 600;
            color: var(--secondary-dark);
            margin-bottom: 4px;
            line-height: 1.4;
        }
        .news-list-item .news-content p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
            margin: 0;
        }
        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: 10px;
            overflow: hidden;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }
        .faq-item.active {
            border-color: var(--primary);
            box-shadow: 0 2px 10px rgba(59,130,196,0.08);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            padding: 16px 20px;
            background: none;
            border: none;
            cursor: pointer;
            font-family: inherit;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            text-align: left;
            transition: color var(--transition-fast);
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question .faq-icon {
            font-size: 14px;
            color: var(--primary);
            transition: transform var(--transition-fast);
            flex-shrink: 0;
        }
        .faq-item.active .faq-question .faq-icon {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.3s ease;
            padding: 0 20px;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 20px 16px;
        }
        .faq-answer p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }
        /* Extension topics */
        .topic-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
            gap: 20px;
        }
        .topic-card {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: box-shadow var(--transition-smooth), transform var(--transition-smooth);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .topic-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .topic-card .topic-img {
            height: 140px;
            background-size: cover;
            background-position: center;
            flex-shrink: 0;
        }
        .topic-card .topic-body {
            padding: 18px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .topic-card .topic-body h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--secondary-dark);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .topic-card .topic-body p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.65;
            margin: 0;
            flex: 1;
        }
        /* CTA Section */
        .cta-section {
            background: linear-gradient(135deg, var(--secondary-dark) 0%, #2C4A6E 50%, #1E3A5F 100%);
            border-radius: var(--radius-card);
            padding: 48px 36px;
            text-align: center;
            color: #fff;
        }
        .cta-section h2 {
            font-size: 26px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
            line-height: 1.4;
        }
        .cta-section p {
            font-size: 16px;
            color: rgba(255,255,255,0.75);
            margin-bottom: 28px;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.7;
        }
        .cta-btn-group {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }
        /* Footer */
        .site-footer {
            background: var(--bg-footer);
            color: rgba(255,255,255,0.7);
            padding-top: 56px;
            padding-bottom: 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 32px;
            padding-bottom: 32px;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }
        .footer-brand .footer-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }
        .footer-brand .footer-logo i {
            color: var(--primary);
            font-size: 20px;
        }
        .footer-brand p {
            font-size: 13px;
            color: rgba(255,255,255,0.55);
            line-height: 1.65;
            max-width: 280px;
        }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: 0.03em;
        }
        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            font-size: 13px;
            color: rgba(255,255,255,0.55);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: var(--primary);
        }
        .footer-subscribe p {
            font-size: 13px;
            color: rgba(255,255,255,0.55);
            margin-bottom: 12px;
        }
        .footer-form {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }
        .footer-form input {
            flex: 1;
            min-width: 140px;
            padding: 10px 12px;
            border: 1px solid rgba(255,255,255,0.2);
            border-radius: var(--radius-input);
            background: rgba(255,255,255,0.06);
            color: #fff;
            font-size: 13px;
            font-family: inherit;
            outline: none;
            transition: border-color var(--transition-fast);
        }
        .footer-form input:focus {
            border-color: var(--primary);
        }
        .footer-form input::placeholder {
            color: rgba(255,255,255,0.4);
        }
        .footer-form .btn-footer-sub {
            padding: 10px 18px;
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: var(--radius-input);
            font-size: 13px;
            font-weight: 600;
            cursor: pointer;
            transition: background-color var(--transition-fast);
            font-family: inherit;
            white-space: nowrap;
        }
        .footer-form .btn-footer-sub:hover {
            background-color: var(--primary-hover);
        }
        .footer-bottom {
            padding-top: 18px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 12px;
            color: rgba(255,255,255,0.45);
        }
        /* Responsive */
        @media (max-width: 1024px) {
            .nav-container {
                gap: 6px 12px;
            }
            .nav-links li a {
                padding: 8px 8px;
                font-size: 14px;
            }
            .nav-search {
                min-width: 140px;
                max-width: 170px;
            }
            .hero-text h1 {
                font-size: 32px;
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .step-arrow {
                display: none;
            }
            .comparison-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .trust-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
        }
        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .nav-actions {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .mobile-menu .nav-actions {
                display: flex;
                flex-direction: column;
                gap: 10px;
                align-items: stretch;
            }
            .mobile-menu .nav-actions .nav-search {
                min-width: 100%;
                max-width: 100%;
            }
            .hero-section {
                padding-top: 60px;
                padding-bottom: 60px;
            }
            .hero-text h1 {
                font-size: 26px;
            }
            .hero-text .hero-subtitle {
                font-size: 17px;
            }
            .hero-content {
                gap: 24px;
            }
            .section-padding {
                padding-top: 50px;
                padding-bottom: 50px;
            }
            .section-padding-sm {
                padding-top: 40px;
                padding-bottom: 40px;
            }
            .section-title {
                font-size: 22px;
            }
            .trust-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .trust-item .trust-num {
                font-size: 24px;
            }
            .capability-grid,
            .scenario-grid,
            .topic-grid,
            .testimonial-grid {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .step-item {
                text-align: left;
                padding: 18px 16px;
            }
            .step-num {
                width: 40px;
                height: 40px;
                font-size: 16px;
                margin-bottom: 10px;
            }
            .stats-panel {
                padding: 24px;
                gap: 16px;
            }
            .stats-big-num .stat-value {
                font-size: 32px;
            }
            .news-list-item {
                flex-direction: column;
                gap: 6px;
                padding: 14px 16px;
            }
            .news-list-item .news-date {
                text-align: left;
            }
            .calc-preview-card {
                padding: 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-section {
                padding: 32px 20px;
            }
            .cta-section h2 {
                font-size: 22px;
            }
            .brand-intro-card {
                padding: 24px;
            }
            .comparison-card {
                padding: 18px;
            }
        }
        @media (max-width: 520px) {
            .hero-text h1 {
                font-size: 22px;
            }
            .hero-text .hero-subtitle {
                font-size: 15px;
            }
            .hero-text p {
                font-size: 14px;
            }
            .btn-primary-custom,
            .btn-secondary-custom,
            .btn-white-outline {
                font-size: 13px;
                padding: 10px 16px;
            }
            .trust-grid {
                grid-template-columns: 1fr 1fr;
                gap: 8px;
            }
            .trust-item .trust-num {
                font-size: 22px;
            }
            .calc-input-group {
                flex-direction: column;
            }
            .calc-input-group .calc-input {
                flex: 1 1 auto;
            }
            .stats-panel {
                flex-direction: column;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #3B82C4;
            --primary-hover: #2F6FA8;
            --primary-light: #EBF2FA;
            --secondary-dark: #1E3A5F;
            --secondary-green: #2E7D32;
            --secondary-orange: #E67E22;
            --bg-white: #FFFFFF;
            --bg-light: #F6F9FC;
            --bg-footer: #1A2B3C;
            --text-primary: #1F2937;
            --text-secondary: #4B5563;
            --text-muted: #6B7280;
            --text-light: #9CA3AF;
            --border: #E5E7EB;
            --border-light: #D1D5DB;
            --radius-card: 12px;
            --radius-btn: 7px;
            --radius-input: 6px;
            --shadow-card: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-card-hover: 0 6px 18px rgba(0,0,0,0.10);
            --shadow-btn: 0 2px 6px rgba(59,130,196,0.25);
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s cubic-bezier(0.4,0,0.2,1);
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: 'PingFang SC','Microsoft YaHei','Noto Sans SC',sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-primary);
            background-color: var(--bg-white);
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--primary-hover);
            text-decoration: none;
        }
        a:focus, button:focus, input:focus, select:focus, textarea:focus {
            outline: 2px solid rgba(59,130,196,0.5);
            outline-offset: 2px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }
        .section-padding {
            padding-top: 80px;
            padding-bottom: 80px;
        }
        .section-padding-sm {
            padding-top: 60px;
            padding-bottom: 60px;
        }
        .section-bg-alt {
            background-color: var(--bg-light);
        }
        .section-title {
            font-size: 26px;
            font-weight: 600;
            color: var(--secondary-dark);
            line-height: 1.4;
            margin-bottom: 16px;
            letter-spacing: 0.01em;
        }
        .section-title.text-white {
            color: #fff;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 32px;
            max-width: 720px;
        }
        .section-subtitle.text-light-muted {
            color: rgba(255,255,255,0.75);
        }
        .card-base {
            background: var(--bg-white);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 24px;
            transition: box-shadow var(--transition-smooth), transform var(--transition-smooth);
            border: 1px solid var(--border);
            height: 100%;
        }
        .card-base:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background-color: var(--primary);
            color: #fff !important;
            font-weight: 600;
            font-size: 15px;
            padding: 12px 24px;
            border-radius: var(--radius-btn);
            border: none;
            cursor: pointer;
            transition: background-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
            box-shadow: var(--shadow-btn);
            text-decoration: none;
            line-height: 1.4;
            white-space: nowrap;
        }
        .btn-primary-custom:hover {
            background-color: var(--primary-hover);
            box-shadow: 0 4px 14px rgba(59,130,196,0.35);
            transform: translateY(-1px);
            color: #fff !important;
        }
        .btn-secondary-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--primary);
            font-weight: 600;
            font-size: 15px;
            padding: 11px 22px;
            border-radius: var(--radius-btn);
            border: 2px solid var(--primary);
            cursor: pointer;
            transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
            text-decoration: none;
            line-height: 1.4;
            white-space: nowrap;
        }
        .btn-secondary-custom:hover {
            background-color: var(--primary-light);
            border-color: var(--primary-hover);
            color: var(--primary-hover);
            transform: translateY(-1px);
        }
        .btn-white-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: #fff;
            font-weight: 600;
            font-size: 15px;
            padding: 11px 22px;
            border-radius: var(--radius-btn);
            border: 2px solid rgba(255,255,255,0.6);
            cursor: pointer;
            transition: background-color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
            text-decoration: none;
            line-height: 1.4;
            white-space: nowrap;
        }
        .btn-white-outline:hover {
            background-color: rgba(255,255,255,0.12);
            border-color: #fff;
            color: #fff;
            transform: translateY(-1px);
        }
        .site-header {
            background-color: var(--bg-white);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 100;
            padding: 0 0;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 68px;
            gap: 16px;
            flex-wrap: nowrap;
        }
        .logo-area {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-icon {
            font-size: 24px;
            color: var(--primary);
            line-height: 1;
        }
        .logo-text {
            font-size: 17px;
            font-weight: 700;
            color: var(--secondary-dark);
            letter-spacing: 0.02em;
            white-space: nowrap;
        }
        .logo-text a {
            color: var(--secondary-dark);
            text-decoration: none;
        }
        .logo-text a:hover {
            color: var(--primary);
        }
        .nav-links {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            align-items: center;
            gap: 22px;
            flex-wrap: nowrap;
        }
        .nav-links li a {
            font-size: 15px;
            color: var(--text-secondary);
            text-decoration: none;
            padding: 8px 2px;
            border-bottom: 2px solid transparent;
            transition: color var(--transition-fast), border-color var(--transition-fast);
            white-space: nowrap;
        }
        .nav-links li a:hover {
            color: var(--primary);
            border-bottom-color: var(--primary);
        }
        .nav-links li a.active {
            color: var(--primary);
            border-bottom-color: var(--primary);
            font-weight: 600;
        }
        .header-search {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }
        .header-search input {
            width: 180px;
            padding: 9px 14px;
            border: 1px solid var(--border);
            border-radius: var(--radius-input);
            font-size: 14px;
            color: var(--text-primary);
            background-color: var(--bg-white);
            transition: border-color var(--transition-fast);
        }
        .header-search input:focus {
            border-color: var(--primary);
            outline: none;
        }
        .header-search input::placeholder {
            color: var(--text-light);
        }
        .btn-login {
            background: transparent;
            color: var(--text-secondary);
            font-size: 14px;
            font-weight: 500;
            padding: 8px 16px;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-btn);
            cursor: pointer;
            transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
            white-space: nowrap;
        }
        .btn-login:hover {
            background-color: var(--bg-light);
            border-color: var(--primary);
            color: var(--primary);
        }
        .btn-start {
            background-color: var(--primary);
            color: #fff !important;
            font-size: 14px;
            font-weight: 600;
            padding: 9px 18px;
            border-radius: var(--radius-btn);
            border: none;
            cursor: pointer;
            transition: background-color var(--transition-fast), box-shadow var(--transition-fast);
            white-space: nowrap;
        }
        .btn-start:hover {
            background-color: var(--primary-hover);
            box-shadow: 0 3px 10px rgba(59,130,196,0.3);
        }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 4px;
            background: transparent;
            border: none;
            cursor: pointer;
            padding: 6px;
        }
        .hamburger span {
            width: 24px;
            height: 2px;
            background-color: var(--text-primary);
            border-radius: 2px;
            transition: all 0.3s ease;
        }
        .mobile-nav {
            display: none;
            flex-direction: column;
            background-color: var(--bg-white);
            border-top: 1px solid var(--border);
            padding: 16px 20px;
            gap: 12px;
        }
        .mobile-nav.open {
            display: flex;
        }
        .mobile-nav .nav-links {
            flex-direction: column;
            align-items: flex-start;
            gap: 6px;
        }
        .mobile-nav .header-search {
            flex-direction: column;
            width: 100%;
            gap: 10px;
        }
        .mobile-nav .header-search input {
            width: 100%;
        }
        .mobile-nav .header-actions {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }
        .breadcrumb-alt {
            background-color: var(--bg-light);
            padding: 14px 0;
            border-bottom: 1px solid var(--border);
        }
        .breadcrumb-alt .container-custom {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
        }
        .breadcrumb-alt a {
            color: var(--text-secondary);
            text-decoration: none;
        }
        .breadcrumb-alt a:hover {
            color: var(--primary);
        }
        .breadcrumb-alt .separator {
            color: var(--text-light);
            font-size: 12px;
        }
        .breadcrumb-alt .current {
            color: var(--primary);
            font-weight: 500;
        }
        .page-head {
            padding: 50px 0 30px 0;
        }
        .page-head h1 {
            font-size: 32px;
            font-weight: 700;
            color: var(--secondary-dark);
            line-height: 1.3;
            margin-bottom: 14px;
            letter-spacing: 0.01em;
        }
        .page-head .lead {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 800px;
            margin-bottom: 18px;
        }
        .filter-bar {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            align-items: center;
            margin-bottom: 30px;
        }
        .filter-tag {
            display: inline-flex;
            align-items: center;
            padding: 8px 18px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            background-color: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: 30px;
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .filter-tag:hover {
            border-color: var(--primary);
            color: var(--primary);
            background-color: var(--primary-light);
        }
        .filter-tag.active {
            background-color: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .list-card {
            display: flex;
            gap: 18px;
            background: var(--bg-white);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            padding: 18px;
            margin-bottom: 18px;
            transition: box-shadow var(--transition-smooth), transform var(--transition-smooth);
            align-items: flex-start;
        }
        .list-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .list-card .thumb {
            flex-shrink: 0;
            width: 150px;
            height: 105px;
            border-radius: 8px;
            overflow: hidden;
            background-color: var(--bg-light);
        }
        .list-card .thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
        }
        .list-card .content {
            flex: 1;
            min-width: 0;
        }
        .list-card .content h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 8px;
            line-height: 1.4;
            transition: color var(--transition-fast);
        }
        .list-card .content h3 a {
            color: var(--text-primary);
            text-decoration: none;
        }
        .list-card .content h3 a:hover {
            color: var(--primary);
        }
        .list-card .content p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 10px;
        }
        .list-card .meta {
            display: flex;
            gap: 14px;
            align-items: center;
            font-size: 12px;
            color: var(--text-light);
        }
        .list-card .meta .tag-badge {
            display: inline-block;
            padding: 3px 10px;
            font-size: 12px;
            font-weight: 500;
            color: var(--primary);
            background-color: var(--primary-light);
            border-radius: 20px;
        }
        .list-card .meta .tag-badge.green {
            color: var(--secondary-green);
            background-color: #E8F5E9;
        }
        .list-card .meta .tag-badge.orange {
            color: var(--secondary-orange);
            background-color: #FFF3E0;
        }
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .stat-card {
            background: var(--bg-white);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            padding: 22px 20px;
            text-align: center;
            transition: box-shadow var(--transition-smooth), transform var(--transition-smooth);
        }
        .stat-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .stat-card .stat-number {
            font-size: 36px;
            font-weight: 700;
            color: var(--secondary-dark);
            line-height: 1.2;
            margin-bottom: 6px;
        }
        .stat-card .stat-label {
            font-size: 14px;
            color: var(--text-muted);
            font-weight: 500;
        }
        .tip-list {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .tip-list li {
            display: flex;
            gap: 14px;
            align-items: flex-start;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .tip-list li .tip-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background-color: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            margin-top: 2px;
        }
        .tip-list li .tip-icon.warn {
            background-color: #FFF3E0;
            color: var(--secondary-orange);
        }
        .tip-list li .tip-icon.green {
            background-color: #E8F5E9;
            color: var(--secondary-green);
        }
        .faq-accordion {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: box-shadow var(--transition-smooth);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-card-hover);
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 18px 22px;
            cursor: pointer;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            transition: color var(--transition-fast);
            gap: 16px;
            user-select: none;
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question .faq-arrow {
            flex-shrink: 0;
            font-size: 14px;
            color: var(--text-light);
            transition: transform var(--transition-fast);
        }
        .faq-question .faq-arrow.rotate {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
            padding: 0 22px;
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.75;
        }
        .faq-answer.open {
            max-height: 400px;
            padding: 0 22px 18px 22px;
        }
        .faq-answer p {
            margin: 0;
        }
        .recommend-card {
            background: var(--bg-white);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            padding: 20px;
            transition: box-shadow var(--transition-smooth), transform var(--transition-smooth);
            height: 100%;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .recommend-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .recommend-card h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            margin: 0;
        }
        .recommend-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            margin: 0;
            flex: 1;
        }
        .subscribe-box {
            background: var(--secondary-dark);
            border-radius: var(--radius-card);
            padding: 36px 28px;
            color: #fff;
        }
        .subscribe-box h3 {
            font-size: 22px;
            font-weight: 600;
            margin-bottom: 12px;
            line-height: 1.4;
        }
        .subscribe-box p {
            font-size: 15px;
            color: rgba(255,255,255,0.75);
            margin-bottom: 22px;
            line-height: 1.7;
        }
        .subscribe-form {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }
        .subscribe-form input {
            flex: 1;
            min-width: 220px;
            padding: 12px 16px;
            border: 1px solid rgba(255,255,255,0.25);
            border-radius: var(--radius-input);
            font-size: 15px;
            color: #fff;
            background-color: rgba(255,255,255,0.08);
            transition: border-color var(--transition-fast);
        }
        .subscribe-form input::placeholder {
            color: rgba(255,255,255,0.5);
        }
        .subscribe-form input:focus {
            border-color: var(--primary);
            outline: none;
        }
        .subscribe-form .btn-primary-custom {
            flex-shrink: 0;
        }
        .category-entry-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }
        .category-entry-card {
            display: flex;
            align-items: center;
            gap: 10px;
            background: var(--bg-white);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            padding: 16px 18px;
            transition: box-shadow var(--transition-smooth), transform var(--transition-smooth);
            color: var(--text-primary);
        }
        .category-entry-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
            color: var(--primary);
        }
        .category-entry-card i {
            font-size: 18px;
            color: var(--primary);
            flex-shrink: 0;
        }
        .category-entry-card span {
            font-size: 14px;
            font-weight: 500;
        }
        .site-footer {
            background-color: var(--bg-footer);
            color: rgba(255,255,255,0.8);
            padding: 60px 0 0 0;
            margin-top: 60px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
        }
        .footer-brand .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 14px;
        }
        .footer-logo i {
            font-size: 24px;
            color: var(--primary);
        }
        .footer-logo span {
            font-size: 17px;
            font-weight: 700;
            color: #fff;
        }
        .footer-brand p {
            font-size: 14px;
            color: rgba(255,255,255,0.7);
            line-height: 1.7;
            max-width: 300px;
        }
        .footer-col h4 {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: rgba(255,255,255,0.7);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: var(--primary);
        }
        .footer-subscribe p {
            font-size: 14px;
            color: rgba(255,255,255,0.7);
            margin-bottom: 14px;
        }
        .footer-form {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }
        .footer-form input {
            flex: 1;
            padding: 11px 14px;
            border: 1px solid rgba(255,255,255,0.25);
            border-radius: var(--radius-input);
            font-size: 14px;
            color: #fff;
            background-color: rgba(255,255,255,0.08);
            transition: border-color var(--transition-fast);
        }
        .footer-form input::placeholder {
            color: rgba(255,255,255,0.5);
        }
        .footer-form input:focus {
            border-color: var(--primary);
            outline: none;
        }
        .btn-footer-sub {
            background-color: var(--primary);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            padding: 11px 20px;
            border-radius: var(--radius-btn);
            border: none;
            cursor: pointer;
            transition: background-color var(--transition-fast);
        }
        .btn-footer-sub:hover {
            background-color: var(--primary-hover);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.12);
            padding: 20px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 12px;
            color: rgba(255,255,255,0.45);
            flex-wrap: wrap;
            gap: 10px;
        }
        @media (max-width: 1024px) {
            .header-search input {
                width: 140px;
            }
            .nav-links {
                gap: 14px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .stat-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .category-entry-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .header-inner {
                flex-wrap: wrap;
                gap: 10px;
            }
            .hamburger {
                display: flex;
            }
            .nav-links, .header-search, .header-actions {
                display: none;
            }
            .mobile-nav .nav-links, .mobile-nav .header-search, .mobile-nav .header-actions {
                display: flex;
            }
            .section-padding {
                padding-top: 60px;
                padding-bottom: 60px;
            }
            .section-padding-sm {
                padding-top: 40px;
                padding-bottom: 40px;
            }
            .page-head h1 {
                font-size: 26px;
            }
            .list-card {
                flex-direction: column;
                gap: 12px;
            }
            .list-card .thumb {
                width: 100%;
                height: 160px;
            }
            .stat-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-card .stat-number {
                font-size: 28px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .subscribe-box {
                padding: 24px 18px;
            }
            .subscribe-form {
                flex-direction: column;
            }
            .subscribe-form input {
                min-width: 100%;
            }
            .category-entry-grid {
                grid-template-columns: 1fr;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }
        @media (max-width: 520px) {
            .container-custom {
                padding-left: 14px;
                padding-right: 14px;
            }
            .page-head h1 {
                font-size: 22px;
            }
            .section-title {
                font-size: 21px;
            }
            .filter-tag {
                padding: 6px 14px;
                font-size: 13px;
            }
            .stat-grid {
                grid-template-columns: 1fr;
            }
            .btn-primary-custom, .btn-secondary-custom {
                font-size: 14px;
                padding: 10px 18px;
            }
        }

/* roulang page: category3 */
:root {
            --primary: #3B82C4;
            --primary-hover: #2F6FA8;
            --primary-light: #EBF2FA;
            --secondary-dark: #1E3A5F;
            --secondary-green: #2E7D32;
            --secondary-orange: #E67E22;
            --bg-white: #FFFFFF;
            --bg-light: #F6F9FC;
            --bg-footer: #1A2B3C;
            --text-primary: #1F2937;
            --text-secondary: #4B5563;
            --text-muted: #6B7280;
            --text-light: #9CA3AF;
            --border: #E5E7EB;
            --border-light: #D1D5DB;
            --radius-card: 12px;
            --radius-btn: 7px;
            --radius-input: 6px;
            --shadow-card: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-card-hover: 0 6px 18px rgba(0,0,0,0.10);
            --shadow-btn: 0 2px 6px rgba(59,130,196,0.25);
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s cubic-bezier(0.4,0,0.2,1);
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: 'PingFang SC','Microsoft YaHei','Noto Sans SC',sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-primary);
            background-color: var(--bg-white);
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--primary-hover);
            text-decoration: none;
        }
        a:focus,
        button:focus,
        input:focus,
        select:focus,
        textarea:focus {
            outline: 2px solid rgba(59,130,196,0.5);
            outline-offset: 2px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }
        .section-padding {
            padding-top: 80px;
            padding-bottom: 80px;
        }
        .section-padding-sm {
            padding-top: 60px;
            padding-bottom: 60px;
        }
        .section-bg-alt {
            background-color: var(--bg-light);
        }
        .section-title {
            font-size: 26px;
            font-weight: 600;
            color: var(--secondary-dark);
            line-height: 1.4;
            margin-bottom: 16px;
            letter-spacing: 0.01em;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 32px;
            max-width: 720px;
        }
        .card-base {
            background: var(--bg-white);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 24px;
            transition: box-shadow var(--transition-smooth), transform var(--transition-smooth);
            border: 1px solid var(--border);
            height: 100%;
        }
        .card-base:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background-color: var(--primary);
            color: #fff !important;
            font-weight: 600;
            font-size: 15px;
            padding: 12px 24px;
            border-radius: var(--radius-btn);
            border: none;
            cursor: pointer;
            transition: background-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
            box-shadow: var(--shadow-btn);
            text-decoration: none;
            line-height: 1.4;
            white-space: nowrap;
        }
        .btn-primary-custom:hover {
            background-color: var(--primary-hover);
            box-shadow: 0 4px 14px rgba(59,130,196,0.35);
            transform: translateY(-1px);
            color: #fff !important;
        }
        .btn-secondary-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--primary);
            font-weight: 600;
            font-size: 15px;
            padding: 11px 22px;
            border-radius: var(--radius-btn);
            border: 2px solid var(--primary);
            cursor: pointer;
            transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
            text-decoration: none;
            line-height: 1.4;
            white-space: nowrap;
        }
        .btn-secondary-custom:hover {
            background-color: var(--primary-light);
            border-color: var(--primary-hover);
            color: var(--primary-hover);
            transform: translateY(-1px);
        }

        /* Header / Nav */
        .site-header {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 1px 4px rgba(0,0,0,0.04);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 12px 0;
            flex-wrap: wrap;
        }
        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 18px;
            color: var(--secondary-dark);
            white-space: nowrap;
            letter-spacing: 0.01em;
        }
        .brand-logo i {
            font-size: 24px;
            color: var(--primary);
            flex-shrink: 0;
        }
        .brand-logo:hover {
            color: var(--primary);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
            flex-wrap: wrap;
        }
        .nav-links li a {
            display: inline-block;
            padding: 8px 14px;
            font-size: 15px;
            color: var(--text-secondary);
            border-radius: 6px;
            transition: color var(--transition-fast), background-color var(--transition-fast);
            white-space: nowrap;
        }
        .nav-links li a:hover {
            color: var(--primary);
            background-color: var(--primary-light);
        }
        .nav-links li a.active {
            color: var(--primary);
            border-bottom: 2px solid var(--primary);
            border-radius: 0;
            background: transparent;
            font-weight: 600;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .search-box-header {
            position: relative;
            width: 200px;
        }
        .search-box-header input {
            width: 100%;
            padding: 9px 36px 9px 14px;
            font-size: 14px;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-input);
            background: var(--bg-white);
            color: var(--text-primary);
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }
        .search-box-header input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(59,130,196,0.12);
            outline: none;
        }
        .search-box-header i {
            position: absolute;
            right: 12px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-muted);
            font-size: 14px;
            pointer-events: none;
        }
        .btn-login {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            background: transparent;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-btn);
            cursor: pointer;
            transition: border-color var(--transition-fast), color var(--transition-fast), background-color var(--transition-fast);
            white-space: nowrap;
        }
        .btn-login:hover {
            border-color: var(--primary);
            color: var(--primary);
            background-color: var(--primary-light);
        }
        .btn-start-header {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 9px 18px;
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            background-color: var(--primary);
            border: none;
            border-radius: var(--radius-btn);
            cursor: pointer;
            transition: background-color var(--transition-fast), filter var(--transition-fast);
            white-space: nowrap;
        }
        .btn-start-header:hover {
            background-color: var(--primary-hover);
            filter: brightness(1.08);
        }
        .nav-toggle {
            display: none;
            background: transparent;
            border: 1px solid var(--border);
            border-radius: 6px;
            padding: 8px 12px;
            font-size: 18px;
            color: var(--text-secondary);
            cursor: pointer;
        }

        /* Breadcrumb */
        .breadcrumb-bar {
            padding: 16px 0 4px;
            font-size: 14px;
            color: var(--text-muted);
        }
        .breadcrumb-bar a {
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }
        .breadcrumb-bar a:hover {
            color: var(--primary);
        }
        .breadcrumb-bar .sep {
            margin: 0 8px;
            color: var(--text-light);
        }
        .breadcrumb-bar .current {
            color: var(--text-secondary);
            font-weight: 500;
        }

        /* Category Header */
        .category-header {
            padding: 32px 0 40px;
            border-bottom: 1px solid var(--border);
        }
        .category-header h1 {
            font-size: 32px;
            font-weight: 700;
            color: var(--secondary-dark);
            line-height: 1.3;
            margin-bottom: 16px;
            letter-spacing: 0.01em;
        }
        .category-header .lead {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 820px;
            margin-bottom: 0;
        }
        .category-header .lead strong {
            color: var(--primary);
            font-weight: 600;
        }

        /* Guide Cards */
        .guide-card {
            background: var(--bg-white);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: box-shadow var(--transition-smooth), transform var(--transition-smooth);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .guide-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .guide-card-img {
            aspect-ratio: 16 / 10;
            overflow: hidden;
            background-color: var(--bg-light);
            flex-shrink: 0;
        }
        .guide-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .guide-card:hover .guide-card-img img {
            transform: scale(1.04);
        }
        .guide-card-body {
            padding: 20px 22px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .guide-card-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 500;
            color: var(--primary);
            background: var(--primary-light);
            padding: 3px 10px;
            border-radius: 20px;
            margin-bottom: 12px;
            align-self: flex-start;
        }
        .guide-card-title {
            font-size: 17px;
            font-weight: 600;
            color: var(--secondary-dark);
            line-height: 1.45;
            margin-bottom: 10px;
            transition: color var(--transition-fast);
        }
        .guide-card:hover .guide-card-title {
            color: var(--primary);
        }
        .guide-card-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            flex: 1;
            margin-bottom: 14px;
        }
        .guide-card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 12px;
            color: var(--text-light);
            border-top: 1px solid var(--border);
            padding-top: 12px;
        }
        .guide-card-meta .date {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .guide-card-meta .badge-minor {
            color: var(--text-muted);
            font-weight: 500;
        }

        /* Stats Mini */
        .stats-mini-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }
        .stat-mini-card {
            background: var(--bg-white);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 20px 18px;
            text-align: center;
            border: 1px solid var(--border);
            transition: box-shadow var(--transition-smooth);
        }
        .stat-mini-card:hover {
            box-shadow: var(--shadow-card-hover);
        }
        .stat-mini-num {
            font-size: 32px;
            font-weight: 700;
            color: var(--secondary-dark);
            line-height: 1.2;
            margin-bottom: 6px;
        }
        .stat-mini-label {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.4;
        }

        /* Tips List */
        .tips-list {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .tips-list li {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            background: var(--bg-white);
            border-radius: 10px;
            padding: 16px 20px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-card);
            transition: box-shadow var(--transition-smooth);
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.65;
        }
        .tips-list li:hover {
            box-shadow: var(--shadow-card-hover);
        }
        .tips-list .tip-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 13px;
            font-weight: 700;
            flex-shrink: 0;
            margin-top: 4px;
        }
        .tips-list .tip-text strong {
            color: var(--secondary-dark);
            font-weight: 600;
        }

        /* Recommend Tools */
        .tool-reco-card {
            background: var(--bg-white);
            border-radius: var(--radius-card);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-card);
            padding: 22px 24px;
            display: flex;
            align-items: center;
            gap: 16px;
            transition: box-shadow var(--transition-smooth), transform var(--transition-smooth);
            height: 100%;
        }
        .tool-reco-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .tool-reco-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 10px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 22px;
            flex-shrink: 0;
        }
        .tool-reco-info {
            flex: 1;
        }
        .tool-reco-info h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--secondary-dark);
            margin-bottom: 4px;
            line-height: 1.4;
        }
        .tool-reco-info p {
            font-size: 14px;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.6;
        }
        .tool-reco-link {
            font-size: 14px;
            font-weight: 500;
            color: var(--primary);
            white-space: nowrap;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .tool-reco-link:hover {
            color: var(--primary-hover);
            gap: 6px;
        }

        /* CTA Subscribe */
        .cta-subscribe-band {
            background: var(--secondary-dark);
            border-radius: var(--radius-card);
            padding: 40px 36px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
        }
        .cta-subscribe-text h2 {
            font-size: 22px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .cta-subscribe-text p {
            font-size: 15px;
            color: rgba(255,255,255,0.75);
            margin: 0;
            line-height: 1.65;
        }
        .subscribe-form {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            min-width: 320px;
            max-width: 520px;
            flex: 1;
        }
        .subscribe-form input {
            flex: 1;
            min-width: 200px;
            padding: 12px 16px;
            font-size: 14px;
            border: 1px solid rgba(255,255,255,0.25);
            border-radius: var(--radius-input);
            background: rgba(255,255,255,0.08);
            color: #fff;
            transition: border-color var(--transition-fast), background-color var(--transition-fast);
        }
        .subscribe-form input::placeholder {
            color: rgba(255,255,255,0.5);
        }
        .subscribe-form input:focus {
            border-color: var(--primary);
            background: rgba(255,255,255,0.14);
            outline: none;
            box-shadow: 0 0 0 3px rgba(59,130,196,0.25);
        }
        .btn-subscribe-white {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 12px 22px;
            font-size: 15px;
            font-weight: 600;
            color: var(--secondary-dark);
            background: #fff;
            border: none;
            border-radius: var(--radius-btn);
            cursor: pointer;
            transition: background-color var(--transition-fast), transform var(--transition-fast);
            white-space: nowrap;
        }
        .btn-subscribe-white:hover {
            background: var(--primary-light);
            transform: translateY(-1px);
        }
        .form-note-mini {
            font-size: 11px;
            color: rgba(255,255,255,0.4);
            margin-top: 8px;
            width: 100%;
        }

        /* Footer */
        .site-footer {
            background: var(--bg-footer);
            color: rgba(255,255,255,0.85);
            padding: 60px 0 24px;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 32px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .footer-brand .footer-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
        }
        .footer-brand .footer-logo i {
            font-size: 24px;
            color: var(--primary);
        }
        .footer-brand p {
            font-size: 14px;
            color: rgba(255,255,255,0.6);
            line-height: 1.7;
            max-width: 300px;
            margin: 0;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }
        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: rgba(255,255,255,0.6);
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: var(--primary);
        }
        .footer-form {
            display: flex;
            gap: 8px;
            margin-top: 12px;
        }
        .footer-form input {
            flex: 1;
            min-width: 0;
            padding: 10px 12px;
            font-size: 13px;
            border: 1px solid rgba(255,255,255,0.2);
            border-radius: var(--radius-input);
            background: rgba(255,255,255,0.07);
            color: #fff;
            transition: border-color var(--transition-fast);
        }
        .footer-form input::placeholder {
            color: rgba(255,255,255,0.4);
        }
        .footer-form input:focus {
            border-color: var(--primary);
            outline: none;
        }
        .btn-footer-sub {
            padding: 10px 18px;
            font-size: 13px;
            font-weight: 600;
            color: #fff;
            background: var(--primary);
            border: none;
            border-radius: var(--radius-btn);
            cursor: pointer;
            transition: background-color var(--transition-fast);
            white-space: nowrap;
        }
        .btn-footer-sub:hover {
            background: var(--primary-hover);
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 20px;
            font-size: 12px;
            color: rgba(255,255,255,0.4);
            flex-wrap: wrap;
            gap: 8px;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .header-inner {
                gap: 10px;
            }
            .search-box-header {
                width: 160px;
            }
            .nav-links li a {
                padding: 8px 10px;
                font-size: 14px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .stats-mini-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .header-inner {
                flex-wrap: nowrap;
                justify-content: space-between;
            }
            .nav-links {
                display: none;
                flex-direction: column;
                align-items: flex-start;
                width: 100%;
                background: var(--bg-white);
                border-top: 1px solid var(--border);
                padding: 12px 0;
                gap: 2px;
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links li a {
                width: 100%;
                padding: 10px 16px;
                border-radius: 0;
            }
            .nav-links li a.active {
                border-bottom: none;
                background: var(--primary-light);
                border-radius: 6px;
                margin: 0 8px;
                width: calc(100% - 16px);
            }
            .header-actions {
                display: flex;
                gap: 6px;
                flex-shrink: 1;
            }
            .search-box-header {
                display: none;
            }
            .nav-toggle {
                display: inline-flex;
                align-items: center;
                justify-content: center;
                flex-shrink: 0;
            }
            .btn-login {
                display: none;
            }
            .category-header h1 {
                font-size: 26px;
            }
            .stats-mini-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-mini-num {
                font-size: 26px;
            }
            .cta-subscribe-band {
                flex-direction: column;
                text-align: left;
                align-items: flex-start;
                padding: 28px 22px;
            }
            .subscribe-form {
                min-width: 0;
                width: 100%;
                flex-direction: column;
            }
            .subscribe-form input {
                min-width: 0;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
                padding-bottom: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 4px;
            }
            .section-padding {
                padding-top: 50px;
                padding-bottom: 50px;
            }
            .section-padding-sm {
                padding-top: 40px;
                padding-bottom: 40px;
            }
        }
        @media (max-width: 520px) {
            .stats-mini-grid {
                grid-template-columns: 1fr;
            }
            .category-header h1 {
                font-size: 22px;
            }
            .guide-card-body {
                padding: 16px 16px 18px;
            }
            .guide-card-title {
                font-size: 15px;
            }
            .btn-start-header {
                padding: 8px 14px;
                font-size: 13px;
            }
            .brand-logo {
                font-size: 16px;
            }
            .brand-logo i {
                font-size: 20px;
            }
        }

/* roulang page: category2 */
:root {
      --primary: #3B82C4;
      --primary-hover: #2F6FA8;
      --primary-light: #EBF2FA;
      --secondary-dark: #1E3A5F;
      --secondary-green: #2E7D32;
      --secondary-orange: #E67E22;
      --bg-white: #FFFFFF;
      --bg-light: #F6F9FC;
      --bg-footer: #1A2B3C;
      --text-primary: #1F2937;
      --text-secondary: #4B5563;
      --text-muted: #6B7280;
      --text-light: #9CA3AF;
      --border: #E5E7EB;
      --border-light: #D1D5DB;
      --radius-card: 12px;
      --radius-btn: 7px;
      --radius-input: 6px;
      --shadow-card: 0 2px 8px rgba(0,0,0,0.06);
      --shadow-card-hover: 0 6px 18px rgba(0,0,0,0.10);
      --shadow-btn: 0 2px 6px rgba(59,130,196,0.25);
      --transition-fast: 0.2s ease;
      --transition-smooth: 0.3s cubic-bezier(0.4,0,0.2,1);
    }

    html {
      scroll-behavior: smooth;
      -webkit-text-size-adjust: 100%;
      box-sizing: border-box;
    }

    *, *::before, *::after {
      box-sizing: inherit;
    }

    body {
      font-family: 'PingFang SC','Microsoft YaHei','Noto Sans SC',sans-serif;
      font-size: 16px;
      line-height: 1.75;
      color: var(--text-primary);
      background-color: var(--bg-white);
      margin: 0;
      padding: 0;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }

    a {
      color: var(--primary);
      text-decoration: none;
      transition: color var(--transition-fast);
    }

    a:hover {
      color: var(--primary-hover);
      text-decoration: none;
    }

    a:focus,
    button:focus,
    input:focus,
    select:focus,
    textarea:focus {
      outline: 2px solid rgba(59,130,196,0.5);
      outline-offset: 2px;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    ul, ol {
      margin: 0;
      padding: 0;
    }

    .container-custom {
      max-width: 1200px;
      margin: 0 auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    .section-padding {
      padding-top: 80px;
      padding-bottom: 80px;
    }

    .section-padding-sm {
      padding-top: 60px;
      padding-bottom: 60px;
    }

    .section-bg-alt {
      background-color: var(--bg-light);
    }

    .section-title {
      font-size: 26px;
      font-weight: 600;
      color: var(--secondary-dark);
      line-height: 1.4;
      margin-bottom: 16px;
      letter-spacing: 0.01em;
    }

    .section-subtitle {
      font-size: 16px;
      color: var(--text-secondary);
      line-height: 1.75;
      margin-bottom: 32px;
      max-width: 760px;
    }

    .card-base {
      background: var(--bg-white);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      padding: 24px;
      transition: box-shadow var(--transition-smooth), transform var(--transition-smooth);
      border: 1px solid var(--border);
      height: 100%;
    }

    .card-base:hover {
      box-shadow: var(--shadow-card-hover);
      transform: translateY(-2px);
    }

    .btn-primary-custom {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background-color: var(--primary);
      color: #fff !important;
      font-weight: 600;
      font-size: 15px;
      padding: 12px 24px;
      border-radius: var(--radius-btn);
      border: none;
      cursor: pointer;
      transition: background-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
      box-shadow: var(--shadow-btn);
      text-decoration: none;
      line-height: 1.4;
      white-space: nowrap;
    }

    .btn-primary-custom:hover {
      background-color: var(--primary-hover);
      box-shadow: 0 4px 14px rgba(59,130,196,0.35);
      transform: translateY(-1px);
      color: #fff !important;
    }

    .btn-secondary-custom {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: transparent;
      color: var(--primary);
      font-weight: 600;
      font-size: 15px;
      padding: 11px 22px;
      border-radius: var(--radius-btn);
      border: 2px solid var(--primary);
      cursor: pointer;
      transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
      text-decoration: none;
      line-height: 1.4;
      white-space: nowrap;
    }

    .btn-secondary-custom:hover {
      background-color: var(--primary-light);
      border-color: var(--primary-hover);
      color: var(--primary-hover);
      transform: translateY(-1px);
    }

    .btn-white-outline {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: transparent;
      color: #fff;
      font-weight: 600;
      font-size: 15px;
      padding: 11px 22px;
      border-radius: var(--radius-btn);
      border: 2px solid rgba(255,255,255,0.6);
      cursor: pointer;
      transition: background-color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
      text-decoration: none;
      line-height: 1.4;
      white-space: nowrap;
    }

    .btn-white-outline:hover {
      background-color: rgba(255,255,255,0.12);
      border-color: #fff;
      color: #fff;
      transform: translateY(-1px);
    }

    /* Header */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 60;
      background: rgba(255,255,255,0.96);
      border-bottom: 1px solid var(--border);
      box-shadow: 0 1px 10px rgba(0,0,0,0.04);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
      min-height: 68px;
      position: relative;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 700;
      font-size: 18px;
      color: var(--secondary-dark);
      white-space: nowrap;
      flex-shrink: 0;
    }

    .logo i {
      color: var(--primary);
      font-size: 24px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      flex: 1;
      justify-content: center;
    }

    .nav-links ul {
      display: flex;
      list-style: none;
      gap: 22px;
      margin: 0;
      padding: 0;
    }

    .nav-links ul li a {
      color: var(--text-secondary);
      font-weight: 500;
      font-size: 15px;
      padding: 6px 0;
      border-bottom: 2px solid transparent;
      transition: color var(--transition-fast), border-color var(--transition-fast);
      white-space: nowrap;
    }

    .nav-links ul li a:hover,
    .nav-links ul li a.active {
      color: var(--primary);
      border-color: var(--primary);
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
      flex-shrink: 0;
    }

    .header-search input {
      width: 190px;
      padding: 9px 14px;
      border-radius: var(--radius-input);
      border: 1px solid var(--border-light);
      font-size: 14px;
      background: #fafafa;
      transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    }

    .header-search input:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(59,130,196,0.08);
      outline: none;
    }

    .btn-login {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 8px 16px;
      border-radius: var(--radius-btn);
      border: 1px solid var(--border-light);
      background: transparent;
      color: var(--text-secondary);
      font-weight: 500;
      font-size: 14px;
      white-space: nowrap;
      transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
      text-decoration: none;
      line-height: 1.4;
    }

    .btn-login:hover {
      background-color: var(--bg-light);
      border-color: #b9c2cc;
      color: var(--text-primary);
    }

    .btn-start {
      padding: 8px 18px;
      font-size: 14px;
      box-shadow: none;
    }

    .nav-toggle {
      display: none;
      background: transparent;
      border: 1px solid var(--border-light);
      border-radius: 6px;
      padding: 9px 12px;
      cursor: pointer;
      color: var(--text-secondary);
      font-size: 18px;
      align-items: center;
      justify-content: center;
      transition: background-color var(--transition-fast), border-color var(--transition-fast);
    }

    .nav-toggle:hover {
      background-color: var(--bg-light);
      border-color: #b9c2cc;
    }

    .mobile-actions {
      display: none;
    }

    /* Breadcrumb */
    .breadcrumb {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 12px;
    }

    .breadcrumb ul {
      list-style: none;
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 0;
      margin: 0;
    }

    .breadcrumb li {
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .breadcrumb li:not(:last-child)::after {
      content: "/";
      color: #c3c9d1;
    }

    .breadcrumb a {
      color: var(--text-muted);
    }

    .breadcrumb a:hover {
      color: var(--primary);
    }

    .breadcrumb li[aria-current="page"] {
      color: var(--text-secondary);
    }

    /* Category header */
    .category-header {
      background-color: var(--bg-light);
      border-bottom: 1px solid var(--border);
      padding: 48px 0 40px;
    }

    .category-header h1 {
      font-size: 32px;
      font-weight: 700;
      color: var(--secondary-dark);
      margin: 0 0 12px;
      line-height: 1.3;
    }

    .category-header p {
      font-size: 16px;
      color: var(--text-secondary);
      max-width: 860px;
      margin: 0;
      line-height: 1.8;
    }

    /* Filter bar */
    .filter-bar {
      padding: 24px 0;
      background: #fff;
      border-bottom: 1px solid var(--border);
    }

    .filter-bar-inner {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-wrap: wrap;
    }

    .filter-btn {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 8px 18px;
      border-radius: 30px;
      border: 1px solid var(--border-light);
      background: #fff;
      color: var(--text-secondary);
      font-size: 14px;
      font-weight: 500;
      cursor: pointer;
      transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast);
      white-space: nowrap;
    }

    .filter-btn:hover {
      border-color: var(--primary);
      color: var(--primary);
    }

    .filter-btn.active {
      background-color: var(--primary);
      border-color: var(--primary);
      color: #fff;
      box-shadow: 0 2px 8px rgba(59,130,196,0.25);
    }

    /* Article list */
    .article-list-section {
      padding: 48px 0 56px;
      background: #fff;
    }

    .article-list-head {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
      margin-bottom: 24px;
    }

    .article-list-head h2 {
      font-size: 22px;
      font-weight: 600;
      color: var(--secondary-dark);
      margin: 0;
    }

    .view-more-link {
      color: var(--primary);
      font-size: 14px;
      font-weight: 500;
      white-space: nowrap;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .view-more-link:hover {
      color: var(--primary-hover);
    }

    .article-list-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 18px;
    }

    .article-card {
      display: flex;
      gap: 16px;
      background: #fff;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      border: 1px solid var(--border);
      padding: 16px;
      transition: box-shadow var(--transition-smooth), transform var(--transition-smooth);
      height: 100%;
    }

    .article-card:hover {
      box-shadow: var(--shadow-card-hover);
      transform: translateY(-2px);
    }

    .article-card img {
      width: 170px;
      height: 118px;
      object-fit: cover;
      border-radius: 8px;
      flex-shrink: 0;
    }

    .article-info {
      flex: 1;
      display: flex;
      flex-direction: column;
      min-width: 0;
    }

    .article-meta {
      display: flex;
      align-items: center;
      gap: 10px;
      margin-bottom: 8px;
      flex-wrap: wrap;
    }

    .article-tag {
      display: inline-flex;
      align-items: center;
      padding: 3px 10px;
      border-radius: 30px;
      background: var(--primary-light);
      color: var(--primary);
      font-size: 12px;
      font-weight: 500;
    }

    .article-date {
      font-size: 12px;
      color: var(--text-light);
    }

    .article-info h3 {
      font-size: 17px;
      font-weight: 600;
      color: var(--secondary-dark);
      line-height: 1.5;
      margin: 0 0 8px;
      transition: color var(--transition-fast);
    }

    .article-card:hover .article-info h3 {
      color: var(--primary);
    }

    .article-info p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin: 0;
      display: -webkit-box;
      -webkit-line-clamp: 3;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }

    /* Stats mini section */
    .stats-mini-section {
      padding: 48px 0;
      background: var(--bg-light);
    }

    .stats-mini-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
    }

    .stat-mini-card {
      background: #fff;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      border: 1px solid var(--border);
      padding: 22px 20px;
      text-align: center;
      transition: box-shadow var(--transition-smooth), transform var(--transition-smooth);
    }

    .stat-mini-card:hover {
      box-shadow: var(--shadow-card-hover);
      transform: translateY(-2px);
    }

    .stat-mini-number {
      font-size: 34px;
      font-weight: 700;
      color: var(--secondary-dark);
      line-height: 1.2;
      margin-bottom: 8px;
      font-family: 'Inter','Roboto',Arial,sans-serif;
    }

    .stat-mini-label {
      font-size: 14px;
      color: var(--text-muted);
    }

    /* Tips section */
    .tips-section {
      padding: 56px 0;
      background: #fff;
    }

    .tips-list {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
      margin-top: 24px;
    }

    .tip-item {
      display: flex;
      align-items: flex-start;
      gap: 14px;
      background: var(--bg-light);
      border-radius: 10px;
      padding: 18px 20px;
      border: 1px solid var(--border);
    }

    .tip-number {
      width: 28px;
      height: 28px;
      flex-shrink: 0;
      background: var(--primary);
      color: #fff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 14px;
      font-weight: 600;
    }

    .tip-text {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.7;
    }

    /* FAQ */
    .faq-section {
      padding: 56px 0;
      background: var(--bg-light);
    }

    .faq-list {
      margin-top: 24px;
      max-width: 860px;
    }

    .faq-item {
      border: 1px solid var(--border);
      border-radius: 10px;
      margin-bottom: 12px;
      overflow: hidden;
      background: #fff;
      transition: box-shadow var(--transition-fast);
    }

    .faq-item:hover {
      box-shadow: 0 3px 12px rgba(0,0,0,0.05);
    }

    .faq-question {
      width: 100%;
      text-align: left;
      padding: 16px 20px;
      background: #fff;
      border: none;
      cursor: pointer;
      font-size: 15px;
      font-weight: 600;
      color: var(--secondary-dark);
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
      font-family: inherit;
      transition: background-color var(--transition-fast);
    }

    .faq-question:hover {
      background-color: #fafbfc;
    }

    .faq-question i {
      color: var(--primary);
      font-size: 14px;
      transition: transform var(--transition-fast);
      flex-shrink: 0;
    }

    .faq-answer {
      padding: 0 20px 0;
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.75;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.25s ease, padding 0.25s ease;
    }

    .faq-item.open .faq-answer {
      padding: 0 20px 18px;
      max-height: 300px;
    }

    .faq-item.open .faq-question {
      background-color: var(--bg-light);
    }

    .faq-item.open .faq-question i {
      transform: rotate(180deg);
    }

    /* Recommend tools */
    .recommend-tools-section {
      padding: 56px 0;
      background: #fff;
    }

    .recommend-tools-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 18px;
      margin-top: 24px;
    }

    .tool-recommend-card {
      background: #fff;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      border: 1px solid var(--border);
      padding: 22px;
      transition: box-shadow var(--transition-smooth), transform var(--transition-smooth);
      display: flex;
      flex-direction: column;
      height: 100%;
    }

    .tool-recommend-card:hover {
      box-shadow: var(--shadow-card-hover);
      transform: translateY(-2px);
    }

    .tool-recommend-card h3 {
      font-size: 17px;
      font-weight: 600;
      color: var(--secondary-dark);
      margin: 0 0 8px;
    }

    .tool-recommend-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin: 0 0 16px;
      flex: 1;
    }

    .tool-recommend-link {
      color: var(--primary);
      font-weight: 600;
      font-size: 14px;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .tool-recommend-link:hover {
      color: var(--primary-hover);
    }

    /* CTA subscribe */
    .cta-subscribe-section {
      padding: 56px 0;
      background: var(--bg-light);
    }

    .subscribe-panel {
      background: #fff;
      border-radius: 14px;
      box-shadow: var(--shadow-card);
      border: 1px solid var(--border);
      padding: 32px 28px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
      flex-wrap: wrap;
    }

    .subscribe-panel h2 {
      font-size: 20px;
      font-weight: 600;
      color: var(--secondary-dark);
      margin: 0 0 8px;
    }

    .subscribe-panel p {
      font-size: 14px;
      color: var(--text-muted);
      margin: 0;
    }

    .subscribe-form {
      display: flex;
      gap: 10px;
      flex-wrap: wrap;
      align-items: center;
    }

    .subscribe-form input {
      padding: 11px 16px;
      border-radius: var(--radius-input);
      border: 1px solid var(--border-light);
      font-size: 14px;
      width: 260px;
      max-width: 100%;
      transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    }

    .subscribe-form input:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(59,130,196,0.08);
      outline: none;
    }

    .btn-sub {
      background: var(--primary);
      color: #fff;
      border: none;
      padding: 11px 22px;
      border-radius: var(--radius-btn);
      font-size: 14px;
      font-weight: 600;
      cursor: pointer;
      transition: background-color var(--transition-fast), transform var(--transition-fast);
      white-space: nowrap;
    }

    .btn-sub:hover {
      background-color: var(--primary-hover);
      transform: translateY(-1px);
    }

    /* Category entry */
    .category-entry-section {
      padding: 56px 0;
      background: #fff;
    }

    .category-entry-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 14px;
      margin-top: 24px;
    }

    .category-entry-card {
      display: flex;
      align-items: center;
      gap: 12px;
      background: var(--bg-light);
      border: 1px solid var(--border);
      border-radius: 10px;
      padding: 14px 16px;
      transition: border-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
    }

    .category-entry-card:hover {
      border-color: var(--primary);
      box-shadow: 0 4px 12px rgba(0,0,0,0.06);
      transform: translateY(-2px);
    }

    .category-entry-card i {
      font-size: 20px;
      color: var(--primary);
      flex-shrink: 0;
    }

    .category-entry-card span {
      font-size: 14px;
      font-weight: 600;
      color: var(--secondary-dark);
      white-space: nowrap;
    }

    /* Footer */
    .site-footer {
      background-color: var(--bg-footer);
      color: rgba(255,255,255,0.7);
      padding: 48px 0 24px;
      font-size: 14px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 36px;
      padding-bottom: 32px;
      border-bottom: 1px solid rgba(255,255,255,0.1);
    }

    .footer-logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 700;
      font-size: 16px;
      color: #fff;
      margin-bottom: 16px;
    }

    .footer-logo i {
      color: var(--primary);
      font-size: 20px;
    }

    .footer-brand p {
      font-size: 13px;
      color: rgba(255,255,255,0.55);
      line-height: 1.7;
      margin: 0;
      max-width: 280px;
    }

    .footer-col h4 {
      font-size: 15px;
      font-weight: 600;
      color: #fff;
      margin: 0 0 16px;
    }

    .footer-col ul {
      list-style: none;
      padding: 0;
      margin: 0;
    }

    .footer-col ul li {
      margin-bottom: 10px;
    }

    .footer-col ul li a {
      color: rgba(255,255,255,0.6);
      font-size: 14px;
      transition: color var(--transition-fast);
    }

    .footer-col ul li a:hover {
      color: #fff;
    }

    .footer-subscribe p {
      font-size: 13px;
      color: rgba(255,255,255,0.55);
      margin: 0 0 14px;
      line-height: 1.7;
    }

    .footer-form {
      display: flex;
      gap: 8px;
      flex-wrap: wrap;
    }

    .footer-form input {
      flex: 1;
      min-width: 150px;
      padding: 10px 14px;
      border-radius: 6px;
      border: 1px solid rgba(255,255,255,0.18);
      background: rgba(255,255,255,0.08);
      color: #fff;
      font-size: 13px;
      transition: border-color var(--transition-fast), background-color var(--transition-fast);
    }

    .footer-form input::placeholder {
      color: rgba(255,255,255,0.4);
    }

    .footer-form input:focus {
      border-color: var(--primary);
      background: rgba(255,255,255,0.12);
      outline: none;
    }

    .btn-footer-sub {
      background: var(--primary);
      color: #fff;
      border: none;
      padding: 10px 18px;
      border-radius: 6px;
      font-size: 13px;
      font-weight: 600;
      cursor: pointer;
      transition: background-color var(--transition-fast);
      white-space: nowrap;
    }

    .btn-footer-sub:hover {
      background-color: var(--primary-hover);
    }

    .footer-bottom {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding-top: 20px;
      font-size: 12px;
      color: rgba(255,255,255,0.45);
      flex-wrap: wrap;
    }

    /* Responsive */
    @media (max-width: 1024px) {
      .header-actions .header-search,
      .header-actions .btn-login,
      .header-actions .btn-start {
        display: none;
      }

      .nav-toggle {
        display: inline-flex;
      }

      .nav-links {
        position: absolute;
        top: calc(100% + 1px);
        left: 0;
        right: 0;
        background: #fff;
        border-bottom: 1px solid var(--border);
        box-shadow: 0 8px 24px rgba(0,0,0,0.08);
        padding: 16px 20px;
        display: none;
        flex-direction: column;
        align-items: stretch;
        z-index: 100;
      }

      .nav-links.open {
        display: flex;
      }

      .nav-links ul {
        flex-direction: column;
        gap: 8px;
      }

      .nav-links ul li a {
        display: block;
        padding: 10px 0;
        border-bottom: none;
        font-size: 16px;
      }

      .nav-links ul li a.active {
        color: var(--primary);
        background: var(--bg-light);
        border-radius: 6px;
        padding-left: 10px;
      }

      .mobile-actions {
        display: flex;
        flex-direction: column;
        gap: 12px;
        padding-top: 14px;
        margin-top: 12px;
        border-top: 1px solid var(--border);
      }

      .mobile-actions .header-search {
        width: 100%;
      }

      .mobile-actions .header-search input {
        width: 100%;
      }

      .mobile-actions .btn-login,
      .mobile-actions .btn-start {
        width: 100%;
        justify-content: center;
      }

      .stats-mini-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .category-entry-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 28px;
      }

      .article-list-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 640px) {
      .container-custom {
        padding-left: 16px;
        padding-right: 16px;
      }

      .section-padding,
      .section-padding-sm {
        padding-top: 48px;
        padding-bottom: 48px;
      }

      .header-inner {
        min-height: 60px;
      }

      .category-header {
        padding: 36px 0 32px;
      }

      .category-header h1 {
        font-size: 26px;
      }

      .article-list-head {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
      }

      .article-card {
        flex-direction: column;
      }

      .article-card img {
        width: 100%;
        height: 160px;
      }

      .stats-mini-grid {
        grid-template-columns: 1fr;
      }

      .tips-list {
        grid-template-columns: 1fr;
      }

      .recommend-tools-grid {
        grid-template-columns: 1fr;
      }

      .category-entry-grid {
        grid-template-columns: 1fr;
      }

      .subscribe-panel {
        padding: 24px 20px;
      }

      .subscribe-form {
        width: 100%;
      }

      .subscribe-form input {
        width: 100%;
      }

      .btn-footer-sub {
        width: 100%;
      }

      .footer-grid {
        grid-template-columns: 1fr;
      }

      .footer-bottom {
        flex-direction: column;
        text-align: center;
      }
    }

/* roulang page: category5 */
:root {
        --primary: #3B82C4;
        --primary-hover: #2F6FA8;
        --primary-light: #EBF2FA;
        --secondary-dark: #1E3A5F;
        --secondary-green: #2E7D32;
        --secondary-orange: #E67E22;
        --bg-white: #FFFFFF;
        --bg-light: #F6F9FC;
        --bg-footer: #1A2B3C;
        --text-primary: #1F2937;
        --text-secondary: #4B5563;
        --text-muted: #6B7280;
        --text-light: #9CA3AF;
        --border: #E5E7EB;
        --border-light: #D1D5DB;
        --radius-card: 12px;
        --radius-btn: 7px;
        --radius-input: 6px;
        --shadow-card: 0 2px 8px rgba(0,0,0,0.06);
        --shadow-card-hover: 0 6px 18px rgba(0,0,0,0.10);
        --shadow-btn: 0 2px 6px rgba(59,130,196,0.25);
        --transition-fast: 0.2s ease;
        --transition-smooth: 0.3s cubic-bezier(0.4,0,0.2,1);
    }
    html {
        scroll-behavior: smooth;
        -webkit-text-size-adjust: 100%;
        box-sizing: border-box;
    }
    *, *::before, *::after {
        box-sizing: inherit;
    }
    body {
        font-family: 'PingFang SC','Microsoft YaHei','Noto Sans SC',sans-serif;
        font-size: 16px;
        line-height: 1.75;
        color: var(--text-primary);
        background-color: var(--bg-white);
        margin: 0;
        padding: 0;
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
    a {
        color: var(--primary);
        text-decoration: none;
        transition: color var(--transition-fast);
    }
    a:hover {
        color: var(--primary-hover);
        text-decoration: none;
    }
    a:focus,
    button:focus,
    input:focus,
    select:focus,
    textarea:focus {
        outline: 2px solid rgba(59,130,196,0.5);
        outline-offset: 2px;
    }
    img {
        max-width: 100%;
        height: auto;
        display: block;
    }
    .container-custom {
        max-width: 1200px;
        margin: 0 auto;
        padding-left: 20px;
        padding-right: 20px;
    }
    .section-padding {
        padding-top: 80px;
        padding-bottom: 80px;
    }
    .section-padding-sm {
        padding-top: 60px;
        padding-bottom: 60px;
    }
    .section-bg-alt {
        background-color: var(--bg-light);
    }
    .section-title {
        font-size: 26px;
        font-weight: 600;
        color: var(--secondary-dark);
        line-height: 1.4;
        margin-bottom: 16px;
        letter-spacing: 0.01em;
    }
    .section-subtitle {
        font-size: 16px;
        color: var(--text-secondary);
        line-height: 1.75;
        margin-bottom: 32px;
        max-width: 720px;
    }
    .card-base {
        background: var(--bg-white);
        border-radius: var(--radius-card);
        box-shadow: var(--shadow-card);
        padding: 24px;
        transition: box-shadow var(--transition-smooth), transform var(--transition-smooth);
        border: 1px solid var(--border);
        height: 100%;
    }
    .card-base:hover {
        box-shadow: var(--shadow-card-hover);
        transform: translateY(-2px);
    }
    .btn-primary-custom {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        background-color: var(--primary);
        color: #fff !important;
        font-weight: 600;
        font-size: 15px;
        padding: 12px 24px;
        border-radius: var(--radius-btn);
        border: none;
        cursor: pointer;
        transition: background-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
        box-shadow: var(--shadow-btn);
        text-decoration: none;
        line-height: 1.4;
        white-space: nowrap;
    }
    .btn-primary-custom:hover {
        background-color: var(--primary-hover);
        box-shadow: 0 4px 14px rgba(59,130,196,0.35);
        transform: translateY(-1px);
        color: #fff !important;
    }
    .btn-secondary-custom {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        background: transparent;
        color: var(--primary);
        font-weight: 600;
        font-size: 15px;
        padding: 11px 22px;
        border-radius: var(--radius-btn);
        border: 2px solid var(--primary);
        cursor: pointer;
        transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
        text-decoration: none;
        line-height: 1.4;
        white-space: nowrap;
    }
    .btn-secondary-custom:hover {
        background-color: var(--primary-light);
        border-color: var(--primary-hover);
        color: var(--primary-hover);
        transform: translateY(-1px);
    }
    /* Header / Navigation */
    .site-header {
        background: var(--bg-white);
        border-bottom: 1px solid var(--border);
        position: sticky;
        top: 0;
        z-index: 100;
        box-shadow: 0 1px 4px rgba(0,0,0,0.03);
    }
    .header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 20px;
        min-height: 68px;
        flex-wrap: wrap;
        padding-top: 8px;
        padding-bottom: 8px;
    }
    .brand-logo {
        display: flex;
        align-items: center;
        gap: 10px;
        font-weight: 700;
        font-size: 18px;
        color: var(--secondary-dark);
        white-space: nowrap;
        letter-spacing: 0.01em;
        line-height: 1.3;
    }
    .brand-logo i {
        font-size: 26px;
        color: var(--primary);
    }
    .brand-logo span {
        color: var(--secondary-dark);
    }
    .brand-logo:hover span {
        color: var(--primary);
    }
    .header-nav-wrapper {
        flex: 1;
        display: flex;
        justify-content: center;
    }
    .nav-links {
        display: flex;
        align-items: center;
        gap: 6px;
        list-style: none;
        margin: 0;
        padding: 0;
    }
    .nav-links li {
        list-style: none;
        margin: 0;
    }
    .nav-links li a {
        display: inline-block;
        padding: 8px 14px;
        font-size: 15px;
        font-weight: 500;
        color: var(--text-secondary);
        border-radius: 6px;
        transition: color var(--transition-fast), background-color var(--transition-fast);
        line-height: 1.4;
        white-space: nowrap;
    }
    .nav-links li a:hover {
        color: var(--primary);
        background-color: var(--primary-light);
    }
    .nav-links li a.active {
        color: var(--primary);
        background-color: var(--primary-light);
        position: relative;
    }
    .nav-links li a.active::after {
        content: '';
        position: absolute;
        left: 14px;
        right: 14px;
        bottom: 2px;
        height: 2px;
        background-color: var(--primary);
        border-radius: 1px;
    }
    .header-actions {
        display: flex;
        align-items: center;
        gap: 12px;
    }
    .header-search {
        position: relative;
    }
    .header-search input {
        width: 200px;
        padding: 9px 14px 9px 36px;
        border: 1px solid var(--border-light);
        border-radius: var(--radius-input);
        font-size: 14px;
        color: var(--text-primary);
        background: var(--bg-white);
        transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        line-height: 1.4;
    }
    .header-search input::placeholder {
        color: var(--text-light);
    }
    .header-search input:focus {
        border-color: var(--primary);
        box-shadow: 0 0 0 3px rgba(59,130,196,0.1);
    }
    .header-search i {
        position: absolute;
        left: 12px;
        top: 50%;
        transform: translateY(-50%);
        color: var(--text-light);
        font-size: 14px;
    }
    .btn-login {
        background: transparent;
        border: 1px solid var(--border-light);
        color: var(--text-secondary);
        font-size: 14px;
        font-weight: 500;
        padding: 9px 18px;
        border-radius: var(--radius-btn);
        cursor: pointer;
        transition: background-color var(--transition-fast), border-color var(--transition-fast);
        line-height: 1.4;
        white-space: nowrap;
    }
    .btn-login:hover {
        background-color: var(--bg-light);
        border-color: var(--text-light);
    }
    .btn-start-calc {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        background-color: var(--primary);
        color: #fff !important;
        font-size: 14px;
        font-weight: 600;
        padding: 10px 20px;
        border-radius: var(--radius-btn);
        border: none;
        cursor: pointer;
        transition: background-color var(--transition-fast), transform var(--transition-fast);
        line-height: 1.4;
        white-space: nowrap;
        text-decoration: none;
    }
    .btn-start-calc:hover {
        background-color: var(--primary-hover);
        transform: translateY(-1px);
    }
    .hamburger {
        display: none;
        flex-direction: column;
        gap: 5px;
        background: transparent;
        border: none;
        cursor: pointer;
        padding: 6px;
        border-radius: 4px;
    }
    .hamburger span {
        display: block;
        width: 26px;
        height: 2px;
        background: var(--text-primary);
        border-radius: 2px;
        transition: transform var(--transition-fast), opacity var(--transition-fast);
    }
    .hamburger.open span:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }
    .hamburger.open span:nth-child(2) {
        opacity: 0;
    }
    .hamburger.open span:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }
    /* Breadcrumb */
    .breadcrumb-nav {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 14px;
        color: var(--text-muted);
        margin-bottom: 16px;
        flex-wrap: wrap;
    }
    .breadcrumb-nav a {
        color: var(--text-muted);
        transition: color var(--transition-fast);
    }
    .breadcrumb-nav a:hover {
        color: var(--primary);
    }
    .breadcrumb-sep {
        color: var(--text-light);
    }
    .breadcrumb-current {
        color: var(--text-primary);
        font-weight: 500;
    }
    /* Page Header (Category H1 area) */
    .page-header {
        background-color: var(--bg-light);
        border-bottom: 1px solid var(--border);
        padding-top: 48px;
        padding-bottom: 48px;
    }
    .page-header h1 {
        font-size: 32px;
        font-weight: 700;
        color: var(--secondary-dark);
        line-height: 1.35;
        margin-bottom: 14px;
        letter-spacing: 0.01em;
    }
    .page-header .lead {
        font-size: 16px;
        color: var(--text-secondary);
        line-height: 1.8;
        max-width: 760px;
        margin-bottom: 0;
    }
    /* News list cards */
    .news-list-card {
        display: flex;
        gap: 20px;
        padding: 20px;
        margin-bottom: 16px;
        align-items: flex-start;
    }
    .news-thumb {
        flex-shrink: 0;
        width: 170px;
        height: 110px;
        border-radius: 8px;
        overflow: hidden;
        background-color: var(--bg-light);
    }
    .news-thumb img {
        width: 100%;
        height: 100%;
        object-fit: cover;
    }
    .news-content {
        flex: 1;
        min-width: 0;
    }
    .news-meta {
        display: flex;
        align-items: center;
        gap: 10px;
        margin-bottom: 8px;
        flex-wrap: wrap;
    }
    .news-date {
        font-size: 12px;
        color: var(--text-light);
    }
    .news-tag {
        display: inline-block;
        font-size: 12px;
        color: var(--primary);
        background-color: var(--primary-light);
        padding: 2px 10px;
        border-radius: 20px;
        font-weight: 500;
    }
    .news-title {
        font-size: 17px;
        font-weight: 600;
        color: var(--text-primary);
        line-height: 1.5;
        margin-bottom: 8px;
        transition: color var(--transition-fast);
    }
    .news-list-card:hover .news-title {
        color: var(--primary);
    }
    .news-summary {
        font-size: 14px;
        color: var(--text-muted);
        line-height: 1.7;
        margin-bottom: 10px;
    }
    .news-link {
        font-size: 14px;
        font-weight: 500;
        color: var(--primary);
        display: inline-flex;
        align-items: center;
        gap: 6px;
        transition: color var(--transition-fast);
    }
    .news-link i {
        font-size: 12px;
        transition: transform var(--transition-fast);
    }
    .news-link:hover i {
        transform: translateX(3px);
    }
    .more-link-wrap {
        text-align: center;
        margin-top: 24px;
    }
    .more-link {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        font-size: 15px;
        font-weight: 600;
        color: var(--primary);
        padding: 10px 24px;
        border: 2px solid var(--primary);
        border-radius: var(--radius-btn);
        transition: background-color var(--transition-fast), color var(--transition-fast);
    }
    .more-link:hover {
        background-color: var(--primary);
        color: #fff;
    }
    /* Data stats cards */
    .stats-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 16px;
    }
    .stat-card {
        background: var(--bg-white);
        border-radius: var(--radius-card);
        box-shadow: var(--shadow-card);
        padding: 20px;
        text-align: center;
        border: 1px solid var(--border);
        transition: box-shadow var(--transition-smooth), transform var(--transition-smooth);
    }
    .stat-card:hover {
        box-shadow: var(--shadow-card-hover);
        transform: translateY(-2px);
    }
    .stat-number {
        font-size: 38px;
        font-weight: 700;
        color: var(--secondary-dark);
        line-height: 1.2;
        font-family: 'Inter','Roboto',Arial,sans-serif;
        letter-spacing: -0.01em;
    }
    .stat-label {
        font-size: 13px;
        color: var(--text-muted);
        margin-top: 6px;
        font-weight: 500;
        line-height: 1.5;
    }
    /* Tips list */
    .tips-list {
        list-style: none;
        padding: 0;
        margin: 0;
        display: flex;
        flex-direction: column;
        gap: 14px;
    }
    .tips-list li {
        display: flex;
        align-items: flex-start;
        gap: 14px;
        font-size: 15px;
        color: var(--text-secondary);
        line-height: 1.7;
        padding: 14px 18px;
        background: var(--bg-white);
        border-radius: 8px;
        border: 1px solid var(--border);
    }
    .tips-list li i {
        color: var(--primary);
        font-size: 18px;
        margin-top: 3px;
        flex-shrink: 0;
    }
    /* FAQ */
    .faq-accordion {
        display: flex;
        flex-direction: column;
        gap: 12px;
    }
    .faq-item {
        background: var(--bg-white);
        border-radius: 10px;
        border: 1px solid var(--border);
        overflow: hidden;
        transition: border-color var(--transition-fast), box-shadow var(--transition-smooth);
    }
    .faq-item.active {
        border-color: var(--primary-light);
        box-shadow: 0 4px 12px rgba(0,0,0,0.06);
    }
    .faq-question {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 16px 20px;
        cursor: pointer;
        background: var(--bg-white);
        border: none;
        width: 100%;
        text-align: left;
        font-size: 15px;
        font-weight: 600;
        color: var(--text-primary);
        line-height: 1.5;
        transition: background-color var(--transition-fast);
        gap: 12px;
    }
    .faq-question:hover {
        background-color: var(--bg-light);
    }
    .faq-question .faq-icon {
        flex-shrink: 0;
        color: var(--primary);
        font-size: 14px;
        transition: transform var(--transition-fast);
    }
    .faq-item.active .faq-icon {
        transform: rotate(180deg);
    }
    .faq-answer {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.35s ease, padding 0.3s ease;
        padding: 0 20px;
    }
    .faq-item.active .faq-answer {
        max-height: 220px;
        padding: 0 20px 18px;
    }
    .faq-answer p {
        font-size: 14px;
        color: var(--text-muted);
        line-height: 1.75;
        margin: 0;
    }
    /* Recommended tools */
    .rec-tools-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 16px;
    }
    .rec-tool-card {
        background: var(--bg-white);
        border-radius: var(--radius-card);
        box-shadow: var(--shadow-card);
        padding: 22px;
        border: 1px solid var(--border);
        display: flex;
        flex-direction: column;
        gap: 10px;
        transition: box-shadow var(--transition-smooth), transform var(--transition-smooth);
    }
    .rec-tool-card:hover {
        box-shadow: var(--shadow-card-hover);
        transform: translateY(-2px);
    }
    .rec-tool-card i {
        font-size: 28px;
        color: var(--primary);
    }
    .rec-tool-card h3 {
        font-size: 16px;
        font-weight: 600;
        color: var(--text-primary);
        margin: 0;
        line-height: 1.4;
    }
    .rec-tool-card p {
        font-size: 13px;
        color: var(--text-muted);
        line-height: 1.65;
        margin: 0;
    }
    .rec-tool-card a {
        font-size: 14px;
        font-weight: 500;
        color: var(--primary);
        display: inline-flex;
        align-items: center;
        gap: 6px;
        margin-top: auto;
        transition: color var(--transition-fast);
    }
    .rec-tool-card a:hover {
        color: var(--primary-hover);
    }
    /* CTA / Subscribe */
    .cta-subscribe-box {
        background: var(--primary-light);
        border-radius: 14px;
        padding: 32px 28px;
        text-align: center;
    }
    .cta-subscribe-box h3 {
        font-size: 22px;
        font-weight: 600;
        color: var(--secondary-dark);
        margin-bottom: 8px;
        line-height: 1.4;
    }
    .cta-subscribe-box p {
        font-size: 15px;
        color: var(--text-secondary);
        line-height: 1.7;
        margin-bottom: 20px;
        max-width: 480px;
        margin-left: auto;
        margin-right: auto;
    }
    .subscribe-form {
        display: flex;
        gap: 12px;
        justify-content: center;
        flex-wrap: wrap;
    }
    .subscribe-form input[type="email"] {
        width: 280px;
        padding: 12px 16px;
        border: 1px solid var(--border-light);
        border-radius: var(--radius-input);
        font-size: 14px;
        color: var(--text-primary);
        background: var(--bg-white);
        transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    }
    .subscribe-form input[type="email"]:focus {
        border-color: var(--primary);
        box-shadow: 0 0 0 3px rgba(59,130,196,0.1);
    }
    .subscribe-form .btn-sub {
        background-color: var(--primary);
        color: #fff;
        font-size: 14px;
        font-weight: 600;
        padding: 12px 28px;
        border-radius: var(--radius-btn);
        border: none;
        cursor: pointer;
        transition: background-color var(--transition-fast), transform var(--transition-fast);
        line-height: 1.4;
    }
    .subscribe-form .btn-sub:hover {
        background-color: var(--primary-hover);
        transform: translateY(-1px);
    }
    .subscribe-note {
        font-size: 12px;
        color: var(--text-light);
        margin-top: 14px;
    }
    /* Footer */
    .site-footer {
        background-color: var(--bg-footer);
        color: rgba(255,255,255,0.85);
        padding-top: 56px;
        padding-bottom: 24px;
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
        gap: 32px;
        margin-bottom: 36px;
    }
    .footer-brand {
        display: flex;
        flex-direction: column;
        gap: 12px;
    }
    .footer-logo {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 18px;
        font-weight: 700;
        color: #fff;
        line-height: 1.3;
    }
    .footer-logo i {
        font-size: 22px;
        color: var(--primary);
    }
    .footer-brand p {
        font-size: 14px;
        color: rgba(255,255,255,0.6);
        line-height: 1.7;
        margin: 0;
        max-width: 260px;
    }
    .footer-col h4 {
        font-size: 15px;
        font-weight: 600;
        color: #fff;
        margin-bottom: 14px;
        line-height: 1.4;
    }
    .footer-col ul {
        list-style: none;
        padding: 0;
        margin: 0;
        display: flex;
        flex-direction: column;
        gap: 8px;
    }
    .footer-col ul li a {
        font-size: 14px;
        color: rgba(255,255,255,0.7);
        transition: color var(--transition-fast);
    }
    .footer-col ul li a:hover {
        color: var(--primary);
    }
    .footer-col .footer-form {
        display: flex;
        gap: 8px;
        flex-direction: column;
    }
    .footer-col .footer-form input {
        padding: 10px 14px;
        border: 1px solid rgba(255,255,255,0.2);
        border-radius: var(--radius-input);
        font-size: 14px;
        color: #fff;
        background: rgba(255,255,255,0.08);
        width: 100%;
    }
    .footer-col .footer-form input::placeholder {
        color: rgba(255,255,255,0.4);
    }
    .footer-col .footer-form input:focus {
        border-color: var(--primary);
        outline: none;
    }
    .btn-footer-sub {
        background-color: var(--primary);
        color: #fff;
        font-size: 14px;
        font-weight: 600;
        padding: 10px 20px;
        border-radius: var(--radius-btn);
        border: none;
        cursor: pointer;
        transition: background-color var(--transition-fast);
        width: 100%;
    }
    .btn-footer-sub:hover {
        background-color: var(--primary-hover);
    }
    .footer-bottom {
        border-top: 1px solid rgba(255,255,255,0.1);
        padding-top: 18px;
        display: flex;
        justify-content: space-between;
        align-items: center;
        font-size: 12px;
        color: rgba(255,255,255,0.5);
        flex-wrap: wrap;
        gap: 8px;
    }
    /* Responsive */
    @media (max-width: 1024px) {
        .header-inner {
            gap: 12px;
        }
        .header-search input {
            width: 150px;
        }
        .stats-grid {
            grid-template-columns: repeat(2, 1fr);
        }
        .footer-grid {
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
    }
    @media (max-width: 768px) {
        .header-inner {
            flex-wrap: nowrap;
        }
        .hamburger {
            display: flex;
        }
        .header-nav-wrapper {
            display: none;
            position: absolute;
            top: 100%;
            left: 0;
            right: 0;
            background: var(--bg-white);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 8px 20px rgba(0,0,0,0.08);
            padding: 16px 20px;
            z-index: 99;
        }
        .header-nav-wrapper.open {
            display: block;
        }
        .nav-links {
            flex-direction: column;
            gap: 4px;
            align-items: stretch;
        }
        .nav-links li a {
            display: block;
            padding: 12px 14px;
            font-size: 15px;
        }
        .nav-links li a.active::after {
            display: none;
        }
        .header-actions {
            margin-left: auto;
            gap: 6px;
        }
        .header-search {
            display: none;
        }
        .header-search.mobile-visible {
            display: block;
            width: 100%;
            margin-bottom: 10px;
        }
        .header-search.mobile-visible input {
            width: 100%;
        }
        .btn-login {
            padding: 8px 14px;
            font-size: 13px;
        }
        .btn-start-calc {
            padding: 8px 14px;
            font-size: 13px;
        }
        .page-header h1 {
            font-size: 26px;
        }
        .news-list-card {
            flex-direction: column;
            gap: 14px;
            padding: 16px;
        }
        .news-thumb {
            width: 100%;
            height: 160px;
        }
        .news-title {
            font-size: 16px;
        }
        .stats-grid {
            grid-template-columns: repeat(2, 1fr);
            gap: 12px;
        }
        .stat-number {
            font-size: 30px;
        }
        .rec-tools-grid {
            grid-template-columns: 1fr;
            gap: 12px;
        }
        .subscribe-form input[type="email"] {
            width: 100%;
        }
        .footer-grid {
            grid-template-columns: 1fr;
            gap: 20px;
        }
        .footer-bottom {
            flex-direction: column;
            text-align: center;
        }
        .section-padding {
            padding-top: 56px;
            padding-bottom: 56px;
        }
        .section-padding-sm {
            padding-top: 40px;
            padding-bottom: 40px;
        }
        .page-header {
            padding-top: 32px;
            padding-bottom: 32px;
        }
    }
    @media (max-width: 520px) {
        .container-custom {
            padding-left: 14px;
            padding-right: 14px;
        }
        .brand-logo {
            font-size: 16px;
        }
        .brand-logo i {
            font-size: 22px;
        }
        .btn-start-calc span {
            display: none;
        }
        .btn-start-calc i {
            font-size: 16px;
        }
        .header-actions {
            gap: 4px;
        }
        .btn-login {
            padding: 7px 10px;
            font-size: 12px;
        }
        .page-header h1 {
            font-size: 23px;
        }
        .news-thumb {
            height: 130px;
        }
        .stats-grid {
            grid-template-columns: 1fr;
        }
        .stat-number {
            font-size: 28px;
        }
        .more-link {
            padding: 8px 18px;
            font-size: 14px;
        }
    }

/* roulang page: category4 */
:root {
        --primary: #3B82C4;
        --primary-hover: #2F6FA8;
        --primary-light: #EBF2FA;
        --secondary-dark: #1E3A5F;
        --secondary-green: #2E7D32;
        --secondary-orange: #E67E22;
        --bg-white: #FFFFFF;
        --bg-light: #F6F9FC;
        --bg-footer: #1A2B3C;
        --text-primary: #1F2937;
        --text-secondary: #4B5563;
        --text-muted: #6B7280;
        --text-light: #9CA3AF;
        --border: #E5E7EB;
        --border-light: #D1D5DB;
        --radius-card: 12px;
        --radius-btn: 7px;
        --radius-input: 6px;
        --shadow-card: 0 2px 8px rgba(0,0,0,0.06);
        --shadow-card-hover: 0 6px 18px rgba(0,0,0,0.10);
        --shadow-btn: 0 2px 6px rgba(59,130,196,0.25);
        --transition-fast: 0.2s ease;
        --transition-smooth: 0.3s cubic-bezier(0.4,0,0.2,1);
    }
    html {
        scroll-behavior: smooth;
        -webkit-text-size-adjust: 100%;
    }
    body {
        font-family: 'PingFang SC','Microsoft YaHei','Noto Sans SC',sans-serif;
        font-size: 16px;
        line-height: 1.75;
        color: var(--text-primary);
        background-color: var(--bg-white);
        margin: 0;
        padding: 0;
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
    a {
        color: var(--primary);
        text-decoration: none;
        transition: color var(--transition-fast);
    }
    a:hover {
        color: var(--primary-hover);
        text-decoration: none;
    }
    a:focus,
    button:focus,
    input:focus,
    select:focus,
    textarea:focus {
        outline: 2px solid rgba(59,130,196,0.5);
        outline-offset: 2px;
    }
    img {
        max-width: 100%;
        height: auto;
        display: block;
    }
    .container-custom {
        max-width: 1200px;
        margin: 0 auto;
        padding-left: 20px;
        padding-right: 20px;
    }
    .section-padding {
        padding-top: 80px;
        padding-bottom: 80px;
    }
    .section-padding-sm {
        padding-top: 60px;
        padding-bottom: 60px;
    }
    .section-bg-alt {
        background-color: var(--bg-light);
    }
    .section-title {
        font-size: 26px;
        font-weight: 600;
        color: var(--secondary-dark);
        line-height: 1.4;
        margin-bottom: 16px;
        letter-spacing: 0.01em;
    }
    .section-subtitle {
        font-size: 16px;
        color: var(--text-secondary);
        line-height: 1.75;
        margin-bottom: 32px;
        max-width: 720px;
    }
    .card-base {
        background: var(--bg-white);
        border-radius: var(--radius-card);
        box-shadow: var(--shadow-card);
        padding: 24px;
        transition: box-shadow var(--transition-smooth), transform var(--transition-smooth);
        border: 1px solid var(--border);
        height: 100%;
    }
    .card-base:hover {
        box-shadow: var(--shadow-card-hover);
        transform: translateY(-2px);
    }
    .btn-primary-custom {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        background-color: var(--primary);
        color: #fff !important;
        font-weight: 600;
        font-size: 15px;
        padding: 12px 24px;
        border-radius: var(--radius-btn);
        border: none;
        cursor: pointer;
        transition: background-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
        box-shadow: var(--shadow-btn);
        text-decoration: none;
        line-height: 1.4;
        white-space: nowrap;
    }
    .btn-primary-custom:hover {
        background-color: var(--primary-hover);
        box-shadow: 0 4px 14px rgba(59,130,196,0.35);
        transform: translateY(-1px);
        color: #fff !important;
    }
    .btn-secondary-custom {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        background: transparent;
        color: var(--primary);
        font-weight: 600;
        font-size: 15px;
        padding: 11px 22px;
        border-radius: var(--radius-btn);
        border: 2px solid var(--primary);
        cursor: pointer;
        transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
        text-decoration: none;
        line-height: 1.4;
        white-space: nowrap;
    }
    .btn-secondary-custom:hover {
        background-color: var(--primary-light);
        border-color: var(--primary-hover);
        color: var(--primary-hover);
        transform: translateY(-1px);
    }
    .btn-white-outline {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        background: transparent;
        color: #fff;
        font-weight: 600;
        font-size: 15px;
        padding: 11px 22px;
        border-radius: var(--radius-btn);
        border: 2px solid rgba(255,255,255,0.6);
        cursor: pointer;
        transition: background-color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
        text-decoration: none;
        line-height: 1.4;
        white-space: nowrap;
    }
    .btn-white-outline:hover {
        background-color: rgba(255,255,255,0.12);
        border-color: #fff;
        color: #fff;
        transform: translateY(-1px);
    }

    /* ===== 导航样式 ===== */
    .site-header {
        background: var(--bg-white);
        border-bottom: 1px solid var(--border);
        position: sticky;
        top: 0;
        z-index: 100;
        width: 100%;
    }
    .nav-container {
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 20px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 68px;
        gap: 18px;
    }
    .nav-logo {
        display: flex;
        align-items: center;
        gap: 8px;
        font-weight: 700;
        font-size: 17px;
        color: var(--secondary-dark);
        white-space: nowrap;
        text-decoration: none;
        flex-shrink: 0;
    }
    .nav-logo i {
        color: var(--primary);
        font-size: 22px;
    }
    .nav-logo span {
        letter-spacing: 0.02em;
    }
    .nav-links-wrapper {
        display: flex;
        align-items: center;
        gap: 22px;
        flex: 1;
        justify-content: center;
    }
    .nav-links {
        display: flex;
        align-items: center;
        gap: 20px;
        list-style: none;
        margin: 0;
        padding: 0;
    }
    .nav-links li a {
        font-size: 15px;
        color: var(--text-secondary);
        padding: 6px 0;
        text-decoration: none;
        border-bottom: 2px solid transparent;
        transition: color var(--transition-fast), border-color var(--transition-fast);
        white-space: nowrap;
    }
    .nav-links li a:hover {
        color: var(--primary);
    }
    .nav-links li a.active {
        color: var(--primary);
        border-bottom-color: var(--primary);
        font-weight: 600;
    }
    .nav-actions {
        display: flex;
        align-items: center;
        gap: 10px;
        flex-shrink: 0;
    }
    .nav-search {
        display: flex;
        align-items: center;
        gap: 6px;
        background: var(--bg-light);
        border: 1px solid var(--border);
        border-radius: var(--radius-input);
        padding: 7px 12px;
        width: 190px;
    }
    .nav-search input {
        border: none;
        background: transparent;
        font-size: 14px;
        color: var(--text-primary);
        width: 100%;
        padding: 0;
        outline: none;
    }
    .nav-search input::placeholder {
        color: var(--text-muted);
    }
    .nav-search i {
        color: var(--text-muted);
        font-size: 13px;
    }
    .btn-login {
        font-size: 14px;
        color: var(--text-secondary);
        background: transparent;
        border: 1px solid var(--border-light);
        border-radius: var(--radius-btn);
        padding: 8px 14px;
        cursor: pointer;
        transition: all var(--transition-fast);
        white-space: nowrap;
        text-decoration: none;
    }
    .btn-login:hover {
        border-color: var(--primary);
        color: var(--primary);
    }
    .btn-start-nav {
        font-size: 14px;
        font-weight: 600;
        color: #fff;
        background: var(--primary);
        border: none;
        border-radius: var(--radius-btn);
        padding: 9px 16px;
        cursor: pointer;
        transition: background-color var(--transition-fast), transform var(--transition-fast);
        white-space: nowrap;
        text-decoration: none;
        display: inline-flex;
        align-items: center;
        gap: 6px;
    }
    .btn-start-nav:hover {
        background: #3575b3;
        transform: translateY(-1px);
        color: #fff;
    }
    .nav-toggle {
        display: none;
        background: none;
        border: none;
        font-size: 22px;
        color: var(--secondary-dark);
        cursor: pointer;
        padding: 6px;
    }
    .mobile-menu {
        display: none;
        background: var(--bg-white);
        border-top: 1px solid var(--border);
        padding: 16px 20px 24px;
        flex-direction: column;
        gap: 14px;
    }
    .mobile-menu .nav-links {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
    .mobile-menu .nav-links li a {
        font-size: 16px;
        display: block;
        width: 100%;
    }
    .mobile-menu .nav-actions {
        flex-direction: column;
        align-items: stretch;
    }
    .mobile-menu .nav-search {
        width: 100%;
    }

    /* ===== 面包屑 ===== */
    .breadcrumb-section {
        background: var(--bg-light);
        border-bottom: 1px solid var(--border);
        padding: 14px 0;
    }
    .breadcrumb-nav {
        font-size: 14px;
        color: var(--text-muted);
        display: flex;
        align-items: center;
        gap: 8px;
        flex-wrap: wrap;
    }
    .breadcrumb-nav a {
        color: var(--text-muted);
        text-decoration: none;
    }
    .breadcrumb-nav a:hover {
        color: var(--primary);
    }
    .breadcrumb-nav .separator {
        color: var(--text-light);
    }
    .breadcrumb-nav .current {
        color: var(--text-primary);
        font-weight: 500;
    }

    /* ===== 分类头区 ===== */
    .category-header {
        background: var(--bg-white);
        padding: 48px 0 40px;
        border-bottom: 1px solid var(--border);
    }
    .category-header h1 {
        font-size: 32px;
        font-weight: 700;
        color: var(--secondary-dark);
        margin: 0 0 14px;
        line-height: 1.35;
        letter-spacing: 0.02em;
    }
    .category-header .lead {
        font-size: 16px;
        color: var(--text-secondary);
        line-height: 1.8;
        max-width: 820px;
        margin: 0;
    }

    /* ===== 列表卡片主体 ===== */
    .list-card-grid {
        display: flex;
        flex-direction: column;
        gap: 20px;
    }
    .list-card-item {
        display: flex;
        background: var(--bg-white);
        border: 1px solid var(--border);
        border-radius: var(--radius-card);
        box-shadow: var(--shadow-card);
        overflow: hidden;
        transition: box-shadow var(--transition-smooth), transform var(--transition-smooth), border-color var(--transition-fast);
        cursor: pointer;
    }
    .list-card-item:hover {
        box-shadow: var(--shadow-card-hover);
        transform: translateY(-2px);
        border-color: var(--primary-light);
    }
    .list-card-thumb {
        flex-shrink: 0;
        width: 170px;
        min-height: 140px;
        background: var(--bg-light);
        overflow: hidden;
    }
    .list-card-thumb img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        display: block;
    }
    .list-card-body {
        flex: 1;
        padding: 20px 24px;
        display: flex;
        flex-direction: column;
        justify-content: center;
        gap: 8px;
    }
    .list-card-body h3 {
        font-size: 17px;
        font-weight: 600;
        color: var(--secondary-dark);
        margin: 0;
        line-height: 1.5;
    }
    .list-card-item:hover .list-card-body h3 {
        color: var(--primary);
    }
    .list-card-body .summary {
        font-size: 14px;
        color: var(--text-muted);
        line-height: 1.7;
        margin: 0;
    }
    .list-card-meta {
        display: flex;
        align-items: center;
        gap: 14px;
        font-size: 12px;
        color: var(--text-light);
        flex-wrap: wrap;
    }
    .list-card-meta .tag {
        background: var(--primary-light);
        color: var(--primary);
        padding: 2px 10px;
        border-radius: 20px;
        font-size: 12px;
        font-weight: 500;
    }
    .list-card-meta .date {
        display: flex;
        align-items: center;
        gap: 4px;
    }
    .list-card-meta .date i {
        font-size: 12px;
        color: var(--text-light);
    }
    .view-more-link {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        font-size: 15px;
        font-weight: 600;
        color: var(--primary);
        text-decoration: none;
        transition: color var(--transition-fast);
        margin-top: 12px;
    }
    .view-more-link:hover {
        color: var(--primary-hover);
    }
    .view-more-link i {
        font-size: 14px;
        transition: transform var(--transition-fast);
    }
    .view-more-link:hover i {
        transform: translateX(3px);
    }

    /* ===== 数据速览面板 ===== */
    .stats-mini-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 18px;
    }
    .stat-mini-card {
        background: var(--bg-white);
        border: 1px solid var(--border);
        border-radius: var(--radius-card);
        padding: 20px;
        text-align: center;
        box-shadow: var(--shadow-card);
        transition: box-shadow var(--transition-smooth), transform var(--transition-smooth);
    }
    .stat-mini-card:hover {
        box-shadow: var(--shadow-card-hover);
        transform: translateY(-2px);
    }
    .stat-mini-card .number {
        font-size: 32px;
        font-weight: 700;
        color: var(--secondary-dark);
        line-height: 1.2;
        margin-bottom: 4px;
    }
    .stat-mini-card .label {
        font-size: 13px;
        color: var(--text-muted);
        font-weight: 500;
    }
    .stat-mini-card .accent-green {
        color: var(--secondary-green);
    }
    .stat-mini-card .accent-orange {
        color: var(--secondary-orange);
    }

    /* ===== 趋势图表面板 ===== */
    .trend-panel {
        background: var(--bg-white);
        border: 1px solid var(--border);
        border-radius: var(--radius-card);
        box-shadow: var(--shadow-card);
        padding: 28px;
    }
    .chart-bars {
        display: flex;
        align-items: flex-end;
        gap: 12px;
        height: 160px;
        margin-top: 24px;
        padding-bottom: 4px;
    }
    .chart-bar-col {
        flex: 1;
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 6px;
    }
    .chart-bar {
        width: 100%;
        background: var(--primary);
        border-radius: 4px 4px 0 0;
        transition: background-color var(--transition-fast), transform var(--transition-fast);
        min-height: 8px;
    }
    .chart-bar:hover {
        background: var(--primary-hover);
        transform: scaleY(1.02);
        transform-origin: bottom;
    }
    .chart-bar-label {
        font-size: 12px;
        color: var(--text-muted);
        text-align: center;
    }
    .chart-legend {
        display: flex;
        gap: 20px;
        margin-top: 16px;
        font-size: 13px;
        color: var(--text-muted);
        flex-wrap: wrap;
    }
    .chart-legend span {
        display: flex;
        align-items: center;
        gap: 6px;
    }
    .legend-dot {
        width: 10px;
        height: 10px;
        border-radius: 50%;
        background: var(--primary);
        display: inline-block;
    }
    .legend-dot.green {
        background: var(--secondary-green);
    }
    .legend-dot.orange {
        background: var(--secondary-orange);
    }

    /* ===== 使用提示 ===== */
    .tips-list {
        list-style: none;
        margin: 0;
        padding: 0;
        display: flex;
        flex-direction: column;
        gap: 14px;
    }
    .tips-list li {
        display: flex;
        align-items: flex-start;
        gap: 12px;
        font-size: 15px;
        color: var(--text-secondary);
        line-height: 1.7;
        background: var(--bg-white);
        border: 1px solid var(--border);
        border-radius: 8px;
        padding: 14px 18px;
        transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    }
    .tips-list li:hover {
        border-color: var(--primary-light);
        box-shadow: var(--shadow-card);
    }
    .tips-list li .tip-number {
        flex-shrink: 0;
        width: 26px;
        height: 26px;
        background: var(--primary);
        color: #fff;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 13px;
        font-weight: 600;
        margin-top: 2px;
    }
    .tips-list li .tip-icon {
        flex-shrink: 0;
        width: 26px;
        height: 26px;
        display: flex;
        align-items: center;
        justify-content: center;
        color: var(--primary);
        font-size: 18px;
        margin-top: 2px;
    }

    /* ===== FAQ 手风琴样式 ===== */
    .faq-accordion {
        list-style: none;
        margin: 0;
        padding: 0;
    }
    .faq-accordion .accordion-item {
        border: 1px solid var(--border);
        border-radius: 10px;
        margin-bottom: 12px;
        background: var(--bg-white);
        overflow: hidden;
        transition: box-shadow var(--transition-smooth);
    }
    .faq-accordion .accordion-item:hover {
        box-shadow: var(--shadow-card);
    }
    .faq-accordion .accordion-title {
        font-size: 15px;
        font-weight: 600;
        color: var(--text-primary);
        padding: 16px 20px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        cursor: pointer;
        background: var(--bg-white);
        text-decoration: none;
        transition: background-color var(--transition-fast), color var(--transition-fast);
        line-height: 1.5;
    }
    .faq-accordion .accordion-title:hover {
        color: var(--primary);
    }
    .faq-accordion .accordion-title::after {
        content: '\f078';
        font-family: 'Font Awesome 6 Free';
        font-weight: 900;
        font-size: 13px;
        color: var(--text-muted);
        transition: transform var(--transition-fast);
    }
    .faq-accordion .accordion-item.is-active .accordion-title::after {
        transform: rotate(180deg);
        color: var(--primary);
    }
    .faq-accordion .accordion-content {
        padding: 0 20px 18px;
        font-size: 14px;
        color: var(--text-secondary);
        line-height: 1.75;
        display: none;
    }
    .faq-accordion .accordion-item.is-active .accordion-content {
        display: block;
    }
    .faq-accordion .accordion-item.is-active .accordion-title {
        background: var(--primary-light);
        color: var(--primary);
    }

    /* ===== 推荐工具卡片 ===== */
    .tool-rec-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 20px;
    }
    .tool-rec-card {
        background: var(--bg-white);
        border: 1px solid var(--border);
        border-radius: var(--radius-card);
        padding: 22px;
        box-shadow: var(--shadow-card);
        text-align: center;
        transition: box-shadow var(--transition-smooth), transform var(--transition-smooth);
        text-decoration: none;
        color: var(--text-primary);
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 10px;
    }
    .tool-rec-card:hover {
        box-shadow: var(--shadow-card-hover);
        transform: translateY(-2px);
        color: var(--text-primary);
    }
    .tool-rec-card .tool-icon {
        width: 48px;
        height: 48px;
        background: var(--primary-light);
        color: var(--primary);
        border-radius: 12px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 22px;
        margin-bottom: 4px;
    }
    .tool-rec-card h3 {
        font-size: 16px;
        font-weight: 600;
        color: var(--secondary-dark);
        margin: 0;
        line-height: 1.4;
    }
    .tool-rec-card p {
        font-size: 13px;
        color: var(--text-muted);
        margin: 0;
        line-height: 1.6;
    }

    /* ===== 订阅 CTA ===== */
    .subscribe-panel {
        background: var(--secondary-dark);
        border-radius: var(--radius-card);
        padding: 36px 32px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 24px;
        flex-wrap: wrap;
    }
    .subscribe-panel .sub-text h3 {
        color: #fff;
        font-size: 20px;
        font-weight: 600;
        margin: 0 0 6px;
    }
    .subscribe-panel .sub-text p {
        color: rgba(255,255,255,0.7);
        font-size: 14px;
        margin: 0;
    }
    .subscribe-form {
        display: flex;
        gap: 10px;
        align-items: center;
        flex-wrap: wrap;
    }
    .subscribe-form input {
        background: rgba(255,255,255,0.1);
        border: 1px solid rgba(255,255,255,0.25);
        border-radius: var(--radius-input);
        padding: 11px 16px;
        color: #fff;
        font-size: 14px;
        width: 240px;
        outline: none;
        transition: border-color var(--transition-fast);
    }
    .subscribe-form input::placeholder {
        color: rgba(255,255,255,0.5);
    }
    .subscribe-form input:focus {
        border-color: rgba(255,255,255,0.6);
    }
    .btn-sub-dark {
        background: var(--primary);
        color: #fff;
        border: none;
        border-radius: var(--radius-btn);
        padding: 11px 22px;
        font-size: 14px;
        font-weight: 600;
        cursor: pointer;
        transition: background-color var(--transition-fast), transform var(--transition-fast);
        white-space: nowrap;
    }
    .btn-sub-dark:hover {
        background: var(--primary-hover);
        transform: translateY(-1px);
    }
    .subscribe-form .form-note {
        font-size: 11px;
        color: rgba(255,255,255,0.35);
        margin-top: 8px;
        width: 100%;
    }

    /* ===== 页脚 ===== */
    .site-footer {
        background: var(--bg-footer);
        padding: 56px 0 28px;
        color: rgba(255,255,255,0.75);
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr 1.5fr;
        gap: 36px;
        margin-bottom: 40px;
    }
    .footer-brand .footer-logo {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 18px;
        font-weight: 700;
        color: #fff;
        margin-bottom: 14px;
    }
    .footer-brand .footer-logo i {
        color: var(--primary);
        font-size: 22px;
    }
    .footer-brand p {
        font-size: 14px;
        color: rgba(255,255,255,0.55);
        line-height: 1.7;
        margin: 0;
    }
    .footer-col h4 {
        color: #fff;
        font-size: 15px;
        font-weight: 600;
        margin: 0 0 14px;
    }
    .footer-col ul {
        list-style: none;
        margin: 0;
        padding: 0;
        display: flex;
        flex-direction: column;
        gap: 8px;
    }
    .footer-col ul li a {
        color: rgba(255,255,255,0.6);
        font-size: 14px;
        text-decoration: none;
        transition: color var(--transition-fast);
    }
    .footer-col ul li a:hover {
        color: #fff;
    }
    .footer-subscribe p {
        font-size: 13px;
        color: rgba(255,255,255,0.5);
        margin: 0 0 12px;
        line-height: 1.6;
    }
    .footer-form {
        display: flex;
        gap: 8px;
        flex-wrap: wrap;
    }
    .footer-form input {
        background: rgba(255,255,255,0.08);
        border: 1px solid rgba(255,255,255,0.2);
        border-radius: var(--radius-input);
        padding: 10px 14px;
        color: #fff;
        font-size: 14px;
        flex: 1;
        min-width: 140px;
        outline: none;
        transition: border-color var(--transition-fast);
    }
    .footer-form input::placeholder {
        color: rgba(255,255,255,0.4);
    }
    .footer-form input:focus {
        border-color: rgba(255,255,255,0.5);
    }
    .btn-footer-sub {
        background: var(--primary);
        color: #fff;
        border: none;
        border-radius: var(--radius-btn);
        padding: 10px 20px;
        font-size: 14px;
        font-weight: 600;
        cursor: pointer;
        transition: background-color var(--transition-fast);
        white-space: nowrap;
    }
    .btn-footer-sub:hover {
        background: var(--primary-hover);
    }
    .footer-bottom {
        border-top: 1px solid rgba(255,255,255,0.1);
        padding-top: 20px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        flex-wrap: wrap;
        gap: 10px;
        font-size: 12px;
        color: rgba(255,255,255,0.4);
    }

    /* ===== 响应式 ===== */
    @media (max-width: 1024px) {
        .nav-search {
            width: 150px;
        }
        .nav-links-wrapper {
            gap: 14px;
        }
        .nav-links {
            gap: 14px;
        }
        .stats-mini-grid {
            grid-template-columns: repeat(2, 1fr);
        }
        .tool-rec-grid {
            grid-template-columns: repeat(2, 1fr);
        }
        .footer-grid {
            grid-template-columns: 1fr 1fr;
            gap: 28px;
        }
        .footer-brand {
            grid-column: 1 / -1;
        }
    }
    @media (max-width: 768px) {
        .nav-container {
            height: 60px;
        }
        .nav-links-wrapper {
            display: none;
        }
        .nav-actions {
            display: none;
        }
        .nav-toggle {
            display: block;
        }
        .mobile-menu.open {
            display: flex;
        }
        .category-header {
            padding: 32px 0 28px;
        }
        .category-header h1 {
            font-size: 26px;
        }
        .section-padding {
            padding-top: 56px;
            padding-bottom: 56px;
        }
        .section-padding-sm {
            padding-top: 44px;
            padding-bottom: 44px;
        }
        .section-title {
            font-size: 22px;
        }
        .list-card-thumb {
            width: 100%;
            min-height: 180px;
            max-height: 200px;
        }
        .list-card-item {
            flex-direction: column;
        }
        .list-card-body {
            padding: 18px 20px;
        }
        .stats-mini-grid {
            grid-template-columns: repeat(2, 1fr);
            gap: 14px;
        }
        .stat-mini-card .number {
            font-size: 26px;
        }
        .chart-bars {
            height: 120px;
            gap: 8px;
        }
        .tool-rec-grid {
            grid-template-columns: 1fr;
            gap: 16px;
        }
        .subscribe-panel {
            flex-direction: column;
            align-items: flex-start;
            padding: 28px 22px;
        }
        .subscribe-form input {
            width: 100%;
        }
        .footer-grid {
            grid-template-columns: 1fr;
            gap: 24px;
        }
        .footer-brand {
            grid-column: auto;
        }
        .footer-bottom {
            flex-direction: column;
            align-items: flex-start;
        }
    }
    @media (max-width: 520px) {
        .container-custom {
            padding-left: 16px;
            padding-right: 16px;
        }
        .category-header h1 {
            font-size: 22px;
        }
        .category-header .lead {
            font-size: 14px;
        }
        .list-card-body h3 {
            font-size: 16px;
        }
        .list-card-body .summary {
            font-size: 13px;
        }
        .stats-mini-grid {
            grid-template-columns: 1fr 1fr;
            gap: 12px;
        }
        .stat-mini-card .number {
            font-size: 22px;
        }
        .stat-mini-card .label {
            font-size: 12px;
        }
        .tips-list li {
            font-size: 14px;
            padding: 12px 14px;
        }
        .tool-rec-card h3 {
            font-size: 15px;
        }
        .breadcrumb-nav {
            font-size: 13px;
        }
    }

/* roulang page: category6 */
:root {
            --primary: #3B82C4;
            --primary-hover: #2F6FA8;
            --primary-light: #EBF2FA;
            --secondary-dark: #1E3A5F;
            --secondary-green: #2E7D32;
            --secondary-orange: #E67E22;
            --bg-white: #FFFFFF;
            --bg-light: #F6F9FC;
            --bg-footer: #1A2B3C;
            --text-primary: #1F2937;
            --text-secondary: #4B5563;
            --text-muted: #6B7280;
            --text-light: #9CA3AF;
            --border: #E5E7EB;
            --border-light: #D1D5DB;
            --radius-card: 12px;
            --radius-btn: 7px;
            --radius-input: 6px;
            --shadow-card: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-card-hover: 0 6px 18px rgba(0,0,0,0.10);
            --shadow-btn: 0 2px 6px rgba(59,130,196,0.25);
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s cubic-bezier(0.4,0,0.2,1);
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: 'PingFang SC','Microsoft YaHei','Noto Sans SC',sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-primary);
            background-color: var(--bg-white);
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--primary-hover);
            text-decoration: none;
        }
        a:focus,
        button:focus,
        input:focus,
        select:focus,
        textarea:focus {
            outline: 2px solid rgba(59,130,196,0.5);
            outline-offset: 2px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }
        .section-padding {
            padding-top: 80px;
            padding-bottom: 80px;
        }
        .section-padding-sm {
            padding-top: 60px;
            padding-bottom: 60px;
        }
        .section-padding-xs {
            padding-top: 40px;
            padding-bottom: 40px;
        }
        .section-bg-alt {
            background-color: var(--bg-light);
        }
        .section-title {
            font-size: 26px;
            font-weight: 600;
            color: var(--secondary-dark);
            line-height: 1.4;
            margin-bottom: 16px;
            letter-spacing: 0.01em;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 32px;
            max-width: 720px;
        }
        .card-base {
            background: var(--bg-white);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 24px;
            transition: box-shadow var(--transition-smooth), transform var(--transition-smooth);
            border: 1px solid var(--border);
            height: 100%;
        }
        .card-base:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background-color: var(--primary);
            color: #fff !important;
            font-weight: 600;
            font-size: 15px;
            padding: 12px 24px;
            border-radius: var(--radius-btn);
            border: none;
            cursor: pointer;
            transition: background-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
            box-shadow: var(--shadow-btn);
            text-decoration: none;
            line-height: 1.4;
            white-space: nowrap;
        }
        .btn-primary-custom:hover {
            background-color: var(--primary-hover);
            box-shadow: 0 4px 14px rgba(59,130,196,0.35);
            transform: translateY(-1px);
            color: #fff !important;
        }
        .btn-secondary-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--primary);
            font-weight: 600;
            font-size: 15px;
            padding: 11px 22px;
            border-radius: var(--radius-btn);
            border: 2px solid var(--primary);
            cursor: pointer;
            transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
            text-decoration: none;
            line-height: 1.4;
            white-space: nowrap;
        }
        .btn-secondary-custom:hover {
            background-color: var(--primary-light);
            border-color: var(--primary-hover);
            color: var(--primary-hover);
            transform: translateY(-1px);
        }
        .btn-white-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: #fff;
            font-weight: 600;
            font-size: 15px;
            padding: 11px 22px;
            border-radius: var(--radius-btn);
            border: 2px solid rgba(255,255,255,0.6);
            cursor: pointer;
            transition: background-color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
            text-decoration: none;
            line-height: 1.4;
            white-space: nowrap;
        }
        .btn-white-outline:hover {
            background-color: rgba(255,255,255,0.12);
            border-color: #fff;
            color: #fff;
            transform: translateY(-1px);
        }
        .text-light-muted {
            color: rgba(255,255,255,0.75);
        }
        .badge-custom {
            display: inline-block;
            padding: 4px 10px;
            border-radius: 4px;
            font-size: 12px;
            font-weight: 500;
            line-height: 1.5;
            background-color: var(--primary-light);
            color: var(--primary);
        }
        .badge-outline {
            display: inline-block;
            padding: 4px 10px;
            border-radius: 4px;
            font-size: 12px;
            font-weight: 500;
            line-height: 1.5;
            border: 1px solid var(--border-light);
            color: var(--text-secondary);
            background: var(--bg-white);
        }
        .divider-light {
            height: 1px;
            background-color: var(--border);
            margin: 24px 0;
        }

        /* Header / Navigation */
        .site-header {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 1px 4px rgba(0,0,0,0.04);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            min-height: 68px;
            flex-wrap: nowrap;
        }
        .header-left {
            display: flex;
            align-items: center;
            gap: 10px;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .header-left .logo-icon {
            font-size: 24px;
            color: var(--primary);
            line-height: 1;
        }
        .header-left .logo-text {
            font-size: 18px;
            font-weight: 700;
            color: var(--secondary-dark);
            line-height: 1.2;
            letter-spacing: 0.02em;
            white-space: nowrap;
        }
        .header-left a {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
        }
        .header-left a:hover .logo-text {
            color: var(--primary-hover);
        }
        .header-center {
            flex: 1;
            display: flex;
            justify-content: center;
            min-width: 0;
        }
        .nav-links ul {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-links li {
            margin: 0;
        }
        .nav-links a {
            display: inline-block;
            padding: 8px 14px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 6px;
            position: relative;
            transition: color var(--transition-fast), background-color var(--transition-fast);
            text-decoration: none;
            white-space: nowrap;
        }
        .nav-links a:hover {
            color: var(--primary);
            background-color: var(--primary-light);
        }
        .nav-links a.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 14px;
            right: 14px;
            height: 2px;
            background-color: var(--primary);
            border-radius: 2px;
        }
        .header-right {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .header-search {
            position: relative;
            display: flex;
            align-items: center;
        }
        .header-search input[type="search"],
        .header-search input[type="text"] {
            width: 190px;
            padding: 9px 14px 9px 36px;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-input);
            font-size: 13px;
            font-family: inherit;
            color: var(--text-primary);
            background-color: var(--bg-white);
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
            outline: none;
            line-height: 1.4;
        }
        .header-search input::placeholder {
            color: var(--text-light);
        }
        .header-search input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(59,130,196,0.12);
        }
        .header-search .search-icon {
            position: absolute;
            left: 12px;
            color: var(--text-light);
            font-size: 13px;
            pointer-events: none;
            line-height: 1;
        }
        .btn-login {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            background: transparent;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-btn);
            cursor: pointer;
            transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
            text-decoration: none;
            white-space: nowrap;
            line-height: 1.4;
        }
        .btn-login:hover {
            background-color: var(--bg-light);
            border-color: var(--text-light);
            color: var(--text-primary);
        }
        .btn-start-nav {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            background-color: var(--primary);
            border: none;
            border-radius: var(--radius-btn);
            cursor: pointer;
            transition: background-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
            text-decoration: none;
            white-space: nowrap;
            line-height: 1.4;
            box-shadow: 0 2px 5px rgba(59,130,196,0.2);
        }
        .btn-start-nav:hover {
            background-color: var(--primary-hover);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 4px 10px rgba(59,130,196,0.3);
        }
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
            font-size: 24px;
            color: var(--text-secondary);
            line-height: 1;
            transition: color var(--transition-fast);
        }
        .mobile-toggle:hover {
            color: var(--primary);
        }

        /* Page header (breadcrumb + H1 area) */
        .page-header-faq {
            padding-top: 48px;
            padding-bottom: 40px;
            background-color: var(--bg-light);
            border-bottom: 1px solid var(--border);
        }
        .breadcrumb-row {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .breadcrumb-row a {
            color: var(--text-muted);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        .breadcrumb-row a:hover {
            color: var(--primary);
        }
        .breadcrumb-row .separator {
            color: var(--text-light);
            font-size: 12px;
        }
        .breadcrumb-row .current {
            color: var(--primary);
            font-weight: 500;
        }
        .page-header-faq .h1-title {
            font-size: 32px;
            font-weight: 700;
            color: var(--secondary-dark);
            line-height: 1.3;
            margin-bottom: 12px;
            letter-spacing: 0.01em;
        }
        .page-header-faq .h1-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.75;
            max-width: 760px;
        }
        .page-header-faq .header-media {
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
        }
        .page-header-faq .header-media img {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }

        /* FAQ accordion */
        .faq-group-label {
            font-size: 18px;
            font-weight: 600;
            color: var(--secondary-dark);
            margin: 28px 0 12px 0;
            padding-bottom: 9px;
            border-bottom: 2px solid var(--border);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .faq-group-label i {
            color: var(--primary);
            font-size: 18px;
        }
        .faq-accordion {
            margin-bottom: 16px;
        }
        .faq-item {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: 10px;
            margin-bottom: 10px;
            overflow: hidden;
            transition: box-shadow var(--transition-smooth), border-color var(--transition-fast);
        }
        .faq-item:hover {
            border-color: var(--border-light);
            box-shadow: 0 2px 6px rgba(0,0,0,0.04);
        }
        .faq-item.open {
            border-color: var(--primary);
            box-shadow: 0 4px 12px rgba(59,130,196,0.08);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 16px 20px;
            background: none;
            border: none;
            cursor: pointer;
            text-align: left;
            font-family: inherit;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.6;
            transition: color var(--transition-fast), background-color var(--transition-fast);
        }
        .faq-question:hover {
            color: var(--primary);
            background-color: var(--bg-light);
        }
        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 22px;
            height: 22px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background-color: var(--primary-light);
            color: var(--primary);
            font-size: 12px;
            transition: transform var(--transition-fast), background-color var(--transition-fast), color var(--transition-fast);
        }
        .faq-item.open .faq-question .faq-icon {
            transform: rotate(180deg);
            background-color: var(--primary);
            color: #fff;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            padding: 0 20px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            transition: max-height var(--transition-smooth), padding var(--transition-smooth);
            box-sizing: content-box;
        }
        .faq-item.open .faq-answer {
            max-height: 500px;
            padding: 0 20px 20px 20px;
        }

        /* Data stat cards */
        .stat-card-faq {
            text-align: center;
            padding: 28px 20px;
            background: var(--bg-white);
            border-radius: var(--radius-card);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-card);
            height: 100%;
            transition: box-shadow var(--transition-smooth), transform var(--transition-smooth);
        }
        .stat-card-faq:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .stat-card-faq .stat-number {
            font-size: 40px;
            font-weight: 700;
            color: var(--secondary-dark);
            line-height: 1.2;
            letter-spacing: 0.02em;
            margin-bottom: 8px;
        }
        .stat-card-faq .stat-number .unit {
            font-size: 18px;
            font-weight: 600;
            color: var(--primary);
            margin-left: 2px;
        }
        .stat-card-faq .stat-label {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* Tips list */
        .tip-list-faq {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .tip-list-faq li {
            display: flex;
            gap: 14px;
            align-items: flex-start;
            padding: 14px 0;
            border-bottom: 1px dashed var(--border);
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .tip-list-faq li:last-child {
            border-bottom: none;
        }
        .tip-list-faq .tip-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background-color: var(--primary-light);
            color: var(--primary);
            font-weight: 700;
            font-size: 14px;
            flex-shrink: 0;
            margin-top: 2px;
        }

        /* Tool recommend cards */
        .tool-recommend-card {
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            gap: 12px;
            padding: 22px;
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            height: 100%;
            transition: box-shadow var(--transition-smooth), transform var(--transition-smooth), border-color var(--transition-fast);
        }
        .tool-recommend-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
            border-color: var(--primary);
        }
        .tool-recommend-card .tool-icon {
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background-color: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
        }
        .tool-recommend-card h4 {
            font-size: 17px;
            font-weight: 600;
            color: var(--secondary-dark);
            margin: 0;
            line-height: 1.4;
        }
        .tool-recommend-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            margin: 0;
            flex: 1;
        }
        .tool-recommend-card .btn-link-arrow {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 5px;
            transition: gap var(--transition-fast), color var(--transition-fast);
        }
        .tool-recommend-card .btn-link-arrow:hover {
            color: var(--primary-hover);
            gap: 8px;
        }

        /* Subscribe CTA */
        .subscribe-card-faq {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 32px;
            text-align: center;
        }
        .subscribe-card-faq .subscribe-icon {
            font-size: 36px;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .subscribe-card-faq h3 {
            font-size: 22px;
            font-weight: 600;
            color: var(--secondary-dark);
            margin-bottom: 8px;
        }
        .subscribe-card-faq p {
            font-size: 15px;
            color: var(--text-muted);
            margin-bottom: 20px;
            max-width: 480px;
            margin-left: auto;
            margin-right: auto;
        }
        .subscribe-form-faq {
            display: flex;
            gap: 10px;
            justify-content: center;
            max-width: 480px;
            margin: 0 auto;
            flex-wrap: wrap;
        }
        .subscribe-form-faq input[type="email"] {
            flex: 1;
            min-width: 200px;
            padding: 11px 16px;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-input);
            font-size: 14px;
            font-family: inherit;
            color: var(--text-primary);
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
            outline: none;
            line-height: 1.4;
        }
        .subscribe-form-faq input[type="email"]::placeholder {
            color: var(--text-light);
        }
        .subscribe-form-faq input[type="email"]:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(59,130,196,0.12);
        }
        .form-note {
            font-size: 11px;
            color: var(--text-light);
            margin-top: 10px;
        }

        /* Contact support */
        .contact-support-card {
            background: var(--bg-light);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 28px;
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
        }
        .contact-support-card .contact-icon {
            font-size: 32px;
            color: var(--primary);
            flex-shrink: 0;
        }
        .contact-support-card h4 {
            font-size: 18px;
            font-weight: 600;
            color: var(--secondary-dark);
            margin: 0 0 6px 0;
        }
        .contact-support-card p {
            font-size: 14px;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.6;
        }

        /* Footer */
        .site-footer {
            background-color: var(--bg-footer);
            color: rgba(255,255,255,0.75);
            padding-top: 50px;
            padding-bottom: 20px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-brand .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: 0.02em;
        }
        .footer-brand .footer-logo i {
            font-size: 22px;
            color: var(--primary);
        }
        .footer-brand p {
            font-size: 14px;
            color: rgba(255,255,255,0.55);
            line-height: 1.7;
            margin: 0;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin: 0 0 14px 0;
            letter-spacing: 0.02em;
        }
        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: rgba(255,255,255,0.55);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: #fff;
        }
        .footer-subscribe p {
            font-size: 14px;
            color: rgba(255,255,255,0.55);
            line-height: 1.6;
            margin: 0 0 14px 0;
        }
        .footer-form {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }
        .footer-form input[type="email"] {
            flex: 1;
            min-width: 140px;
            padding: 10px 14px;
            border: 1px solid rgba(255,255,255,0.2);
            border-radius: var(--radius-input);
            background-color: rgba(255,255,255,0.08);
            color: #fff;
            font-size: 13px;
            font-family: inherit;
            transition: border-color var(--transition-fast), background-color var(--transition-fast);
            outline: none;
            line-height: 1.4;
        }
        .footer-form input[type="email"]::placeholder {
            color: rgba(255,255,255,0.35);
        }
        .footer-form input[type="email"]:focus {
            border-color: var(--primary);
            background-color: rgba(255,255,255,0.12);
        }
        .btn-footer-sub {
            display: inline-flex;
            align-items: center;
            padding: 10px 18px;
            font-size: 13px;
            font-weight: 600;
            color: #fff;
            background-color: var(--primary);
            border: none;
            border-radius: var(--radius-input);
            cursor: pointer;
            transition: background-color var(--transition-fast);
            white-space: nowrap;
            line-height: 1.4;
        }
        .btn-footer-sub:hover {
            background-color: var(--primary-hover);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 18px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 12px;
            color: rgba(255,255,255,0.35);
        }
        .footer-bottom span:last-child {
            font-family: 'Inter','Roboto','Arial',sans-serif;
        }

        /* Responsive */
        @media screen and (max-width: 1024px) {
            .header-inner {
                flex-wrap: wrap;
                gap: 12px;
                padding-top: 10px;
                padding-bottom: 10px;
            }
            .header-center {
                order: 3;
                width: 100%;
                justify-content: flex-start;
                overflow-x: auto;
                -webkit-overflow-scrolling: touch;
                padding-bottom: 4px;
            }
            .nav-links ul {
                gap: 2px;
            }
            .nav-links a {
                padding: 6px 10px;
                font-size: 14px;
            }
            .header-search input[type="search"],
            .header-search input[type="text"] {
                width: 150px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
        }
        @media screen and (max-width: 768px) {
            .header-inner {
                flex-wrap: nowrap;
                gap: 10px;
            }
            .header-center {
                display: none;
                order: initial;
                width: auto;
                overflow: visible;
                padding-bottom: 0;
            }
            .header-center.mobile-show {
                display: block;
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                background: var(--bg-white);
                border-bottom: 1px solid var(--border);
                box-shadow: 0 8px 16px rgba(0,0,0,0.08);
                padding: 16px 20px;
                z-index: 99;
            }
            .header-center.mobile-show .nav-links ul {
                flex-direction: column;
                gap: 2px;
            }
            .header-center.mobile-show .nav-links a {
                display: block;
                padding: 10px 14px;
                font-size: 15px;
            }
            .header-center.mobile-show .nav-links a.active::after {
                display: none;
            }
            .header-center.mobile-show .nav-links a.active {
                background-color: var(--primary-light);
                border-radius: 6px;
            }
            .mobile-toggle {
                display: inline-flex;
            }
            .header-search {
                display: none;
            }
            .header-right .btn-login {
                display: none;
            }
            .header-right .btn-start-nav {
                display: inline-flex;
                padding: 7px 12px;
                font-size: 13px;
            }
            .page-header-faq .h1-title {
                font-size: 26px;
            }
            .page-header-faq .header-media img {
                height: 160px;
            }
            .section-padding {
                padding-top: 50px;
                padding-bottom: 50px;
            }
            .section-padding-sm {
                padding-top: 40px;
                padding-bottom: 40px;
            }
            .section-title {
                font-size: 22px;
            }
            .stat-card-faq .stat-number {
                font-size: 32px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .subscribe-form-faq {
                flex-direction: column;
            }
            .subscribe-form-faq input[type="email"] {
                min-width: 100%;
            }
        }
        @media screen and (max-width: 520px) {
            .container-custom {
                padding-left: 14px;
                padding-right: 14px;
            }
            .page-header-faq .h1-title {
                font-size: 23px;
            }
            .page-header-faq .h1-subtitle {
                font-size: 14px;
            }
            .header-left .logo-text {
                font-size: 15px;
            }
            .header-left .logo-icon {
                font-size: 20px;
            }
            .faq-question {
                padding: 14px 16px;
                font-size: 14px;
            }
            .faq-answer {
                padding: 0 16px;
                font-size: 13px;
            }
            .faq-item.open .faq-answer {
                padding: 0 16px 16px 16px;
            }
            .stat-card-faq {
                padding: 20px 14px;
            }
            .tool-recommend-card {
                padding: 18px;
            }
            .subscribe-card-faq {
                padding: 24px 18px;
            }
            .contact-support-card {
                padding: 20px;
                flex-direction: column;
                text-align: center;
            }
        }