/* roulang page: index */
:root {
            --color-primary: #0B7A4B;
            --color-secondary: #F59E0B;
            --color-dark: #0A3B2E;
            --color-accent: #DC2626;
            --color-lightBg: #F4F8F5;
            --color-card: #FFFFFF;
            --color-bodyText: #1A2E24;
            --color-mutedText: #5A6B60;
            --color-border: #E0EAE3;
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-large: 16px;
            --shadow-card: 0 2px 8px rgba(10, 59, 46, 0.06);
            --shadow-card-hover: 0 8px 24px rgba(10, 59, 46, 0.12);
            --transition-base: 0.2s ease;
            --max-width: 1280px;
            --section-padding: 80px;
            --section-padding-mobile: 56px;
            --card-gap: 28px;
            --card-padding: 24px;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--color-bodyText);
            background-color: #ffffff;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-base);
        }

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            background: none;
        }

        input {
            font-family: inherit;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        .section {
            padding: var(--section-padding) 0;
        }

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

        .section-title {
            font-size: 26px;
            font-weight: 700;
            color: var(--color-dark);
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--color-mutedText);
            margin-bottom: 36px;
            max-width: 680px;
            line-height: 1.75;
        }

        .section-header {
            margin-bottom: 16px;
        }

        .section-header .section-subtitle {
            margin-bottom: 0;
        }

        .tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 500;
            color: var(--color-primary);
            background: #e8f4ec;
            padding: 4px 12px;
            border-radius: 20px;
            line-height: 1.4;
            letter-spacing: 0.4px;
        }

        .btn {
            display: inline-block;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            text-align: center;
            transition: all var(--transition-base);
            letter-spacing: 0.3px;
            line-height: 1.5;
        }

        .btn-primary {
            background-color: var(--color-primary);
            color: #ffffff;
            box-shadow: 0 2px 6px rgba(11, 122, 75, 0.25);
        }

        .btn-primary:hover {
            background-color: var(--color-dark);
            box-shadow: 0 6px 16px rgba(10, 59, 46, 0.3);
            transform: translateY(-2px);
        }

        .btn-primary:focus-visible {
            outline: 3px solid var(--color-secondary);
            outline-offset: 2px;
        }

        .btn-secondary {
            background: transparent;
            color: var(--color-primary);
            border: 1.5px solid var(--color-primary);
        }

        .btn-secondary:hover {
            background-color: var(--color-lightBg);
            border-color: var(--color-dark);
            color: var(--color-dark);
            transform: translateY(-2px);
        }

        .btn-secondary:focus-visible {
            outline: 3px solid var(--color-secondary);
            outline-offset: 2px;
        }

        .btn-light {
            background-color: #ffffff;
            color: var(--color-dark);
        }

        .btn-light:hover {
            background-color: var(--color-secondary);
            color: #ffffff;
            transform: translateY(-2px);
        }

        .card {
            background: var(--color-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: var(--card-padding);
            transition: all var(--transition-base);
            border: 1px solid rgba(0,0,0,0.02);
        }

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

        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--card-gap);
        }

        .card-grid-two {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--card-gap);
        }

        .icon-badge {
            width: 48px;
            height: 48px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: #e8f4ec;
            color: var(--color-primary);
            font-size: 20px;
            flex-shrink: 0;
            transition: transform var(--transition-base);
        }

        .card:hover .icon-badge {
            transform: scale(1.06);
        }

        .icon-badge-orange {
            background: #fef3e2;
            color: var(--color-secondary);
        }

        .icon-badge-red {
            background: #fde8e8;
            color: var(--color-accent);
        }

        /* Navigation */
        .site-header {
            background-color: var(--color-dark);
            position: sticky;
            top: 0;
            z-index: 50;
            box-shadow: 0 2px 10px rgba(0,0,0,0.12);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            color: #ffffff;
            font-weight: 700;
            font-size: 20px;
            letter-spacing: 0.6px;
        }

        .nav-logo .logo-icon {
            width: 32px;
            height: 32px;
            background: var(--color-primary);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 15px;
            color: #fff;
        }

        .nav-logo:hover {
            color: var(--color-secondary);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
        }

        .nav-links a {
            color: rgba(255,255,255,0.82);
            font-size: 15px;
            font-weight: 500;
            transition: color var(--transition-base);
            letter-spacing: 0.2px;
        }

        .nav-links a:hover {
            color: var(--color-secondary);
        }

        .nav-links a.active {
            color: var(--color-secondary);
            font-weight: 600;
        }

        .nav-toggle {
            display: none;
            color: #ffffff;
            font-size: 24px;
            background: none;
            border: none;
            cursor: pointer;
            padding: 4px;
        }

        .nav-toggle:focus-visible {
            outline: 2px solid var(--color-secondary);
            outline-offset: 2px;
            border-radius: 4px;
        }

        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }

            .nav-links {
                display: none;
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                background-color: var(--color-dark);
                flex-direction: column;
                padding: 16px 24px 24px;
                gap: 4px;
                box-shadow: 0 8px 20px rgba(0,0,0,0.15);
            }

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

            .nav-links li {
                width: 100%;
            }

            .nav-links a {
                display: block;
                padding: 12px 0;
                font-size: 16px;
                border-bottom: 1px solid rgba(255,255,255,0.06);
            }

            .nav-links li:last-child a {
                border-bottom: none;
            }
        }

        /* Hero */
        .hero {
            background-color: var(--color-dark);
            background-image: url('/assets/images/35af57be21e73913.webp');
            background-size: cover;
            background-position: center;
            position: relative;
            padding: 96px 0 88px;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(135deg, rgba(10,59,46,0.92) 0%, rgba(10,59,46,0.72) 45%, rgba(11,122,75,0.5) 100%);
            z-index: 1;
        }

        .hero::after {
            content: '';
            position: absolute;
            right: -120px;
            top: 40px;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(11,122,75,0.35) 0%, transparent 70%);
            z-index: 1;
            pointer-events: none;
        }

        .hero .container {
            position: relative;
            z-index: 2;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .hero-content h1 {
            font-size: 32px;
            font-weight: 700;
            color: #ffffff;
            line-height: 1.35;
            margin-bottom: 16px;
            letter-spacing: 0.4px;
        }

        .hero-content .hero-subtitle {
            font-size: 18px;
            color: rgba(255,255,255,0.85);
            line-height: 1.7;
            margin-bottom: 20px;
            max-width: 520px;
        }

        .hero-content .hero-desc {
            font-size: 16px;
            color: rgba(255,255,255,0.7);
            line-height: 1.8;
            margin-bottom: 32px;
            max-width: 540px;
        }

        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 28px;
        }

        .hero-stats {
            display: flex;
            gap: 32px;
            flex-wrap: wrap;
        }

        .hero-stat-item {
            text-align: left;
        }

        .hero-stat-value {
            font-size: 28px;
            font-weight: 700;
            color: var(--color-secondary);
            line-height: 1.2;
            font-family: 'Courier New', monospace;
            letter-spacing: 0.5px;
        }

        .hero-stat-label {
            font-size: 13px;
            color: rgba(255,255,255,0.6);
            margin-top: 4px;
        }

        .hero-image-wrapper {
            position: relative;
            border-radius: var(--radius-large);
            overflow: hidden;
            box-shadow: 0 16px 48px rgba(0,0,0,0.3);
            border: 3px solid rgba(255,255,255,0.12);
            max-height: 420px;
        }

        .hero-image-wrapper img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 320px;
            max-height: 420px;
        }

        .hero-image-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: 16px 20px;
            background: linear-gradient(transparent, rgba(10,59,46,0.85));
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }

        .hero-image-overlay span {
            color: #ffffff;
            font-size: 13px;
            font-weight: 500;
        }

        .hero-image-overlay .live-dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            background: var(--color-accent);
            border-radius: 50%;
            animation: pulse 1.6s infinite;
        }

        @keyframes pulse {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.35; }
        }

        @media (max-width: 1024px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .hero-image-wrapper {
                max-height: 320px;
            }

            .hero-image-wrapper img {
                max-height: 320px;
                min-height: 260px;
            }
        }

        @media (max-width: 768px) {
            .hero {
                padding: 56px 0 64px;
            }

            .hero-content h1 {
                font-size: 24px;
            }

            .hero-content .hero-subtitle {
                font-size: 16px;
            }

            .hero-actions {
                flex-direction: column;
            }

            .hero-actions .btn {
                width: 100%;
            }

            .hero-stats {
                gap: 20px;
            }

            .hero-stat-value {
                font-size: 22px;
            }

            .hero-image-wrapper {
                max-height: 260px;
                border-radius: 12px;
            }

            .hero-image-wrapper img {
                min-height: 200px;
                max-height: 260px;
            }
        }

        /* Pain point cards */
        .pain-card .pain-number {
            font-size: 13px;
            color: var(--color-mutedText);
            font-weight: 600;
            margin-bottom: 12px;
            letter-spacing: 1px;
            text-transform: uppercase;
        }

        .pain-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-dark);
            margin-bottom: 8px;
            line-height: 1.45;
        }

        .pain-card p {
            font-size: 15px;
            color: var(--color-mutedText);
            line-height: 1.7;
        }

        /* Solution */
        .solution-card {
            background: var(--color-card);
            border-radius: var(--radius-card);
            padding: 24px 20px;
            border: 1px solid var(--color-border);
            transition: all var(--transition-base);
            height: 100%;
        }

        .solution-card:hover {
            border-color: var(--color-primary);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }

        .solution-card .solution-step {
            display: inline-block;
            font-size: 12px;
            font-weight: 700;
            color: #ffffff;
            background: var(--color-primary);
            border-radius: 6px;
            padding: 2px 10px;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }

        .solution-card h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--color-dark);
            margin-bottom: 8px;
        }

        .solution-card p {
            font-size: 14px;
            color: var(--color-mutedText);
            line-height: 1.7;
        }

        /* Timeline steps */
        .steps-list {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .step-item {
            background: var(--color-card);
            border-radius: var(--radius-card);
            padding: 28px 22px;
            text-align: center;
            box-shadow: var(--shadow-card);
            border-top: 3px solid var(--color-primary);
            transition: all var(--transition-base);
        }

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

        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--color-primary);
            color: #ffffff;
            font-weight: 700;
            font-size: 18px;
            margin-bottom: 14px;
        }

        .step-item h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--color-dark);
            margin-bottom: 8px;
        }

        .step-item p {
            font-size: 14px;
            color: var(--color-mutedText);
            line-height: 1.65;
        }

        @media (max-width: 1024px) {
            .steps-list {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .steps-list {
                grid-template-columns: 1fr;
            }
        }

        /* Results data */
        .results-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .result-stat {
            background: var(--color-card);
            border-radius: var(--radius-card);
            padding: 28px 20px;
            text-align: center;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
        }

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

        .result-number {
            font-size: 38px;
            font-weight: 800;
            color: var(--color-primary);
            font-family: 'Courier New', monospace;
            letter-spacing: 0.5px;
            line-height: 1.2;
        }

        .result-unit {
            font-size: 16px;
            color: var(--color-mutedText);
            margin-top: 4px;
        }

        .result-label {
            font-size: 13px;
            color: var(--color-mutedText);
            margin-top: 8px;
            line-height: 1.5;
        }

        @media (max-width: 1024px) {
            .results-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .results-grid {
                grid-template-columns: 1fr;
            }
        }

        /* Testimonials */
        .testimonial-card {
            background: var(--color-card);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            box-shadow: var(--shadow-card);
            border-left: 3px solid var(--color-secondary);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
        }

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

        .testimonial-text {
            font-size: 15px;
            color: var(--color-bodyText);
            line-height: 1.75;
            margin-bottom: 16px;
            flex: 1;
        }

        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .testimonial-avatar {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--color-lightBg);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 14px;
            color: var(--color-primary);
        }

        .testimonial-name {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-dark);
        }

        .testimonial-role {
            font-size: 12px;
            color: var(--color-mutedText);
        }

        /* Audience */
        .audience-card {
            background: var(--color-card);
            border-radius: var(--radius-card);
            padding: 28px 22px;
            text-align: center;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
            border: 1px solid var(--color-border);
        }

        .audience-card:hover {
            border-color: var(--color-primary);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }

        .audience-card .icon-badge {
            margin: 0 auto 14px;
        }

        .audience-card h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--color-dark);
            margin-bottom: 8px;
        }

        .audience-card p {
            font-size: 14px;
            color: var(--color-mutedText);
            line-height: 1.65;
        }

        /* Brand introduction */
        .brand-section {
            background-color: var(--color-dark);
            background-image: url('/assets/images/cb372600d9e39dd9.webp');
            background-size: cover;
            background-position: center;
            position: relative;
            padding: 72px 0;
        }

        .brand-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(10,59,46,0.9);
        }

        .brand-section .container {
            position: relative;
            z-index: 2;
        }

        .brand-content {
            color: rgba(255,255,255,0.85);
            font-size: 16px;
            line-height: 1.85;
            max-width: 900px;
        }

        .brand-content h2 {
            color: #ffffff;
            font-size: 24px;
            margin-bottom: 16px;
        }

        .brand-content p {
            margin-bottom: 14px;
        }

        .brand-content strong {
            color: var(--color-secondary);
            font-weight: 600;
        }

        /* Data metrics band */
        .metrics-band {
            background: var(--color-card);
            border-radius: var(--radius-card);
            padding: 32px 28px;
            box-shadow: var(--shadow-card);
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            border: 1px solid var(--color-border);
        }

        .metric-item {
            text-align: center;
            padding: 12px 8px;
            border-right: 1px solid var(--color-border);
        }

        .metric-item:last-child {
            border-right: none;
        }

        .metric-value {
            font-size: 32px;
            font-weight: 800;
            color: var(--color-primary);
            font-family: 'Courier New', monospace;
            letter-spacing: 0.5px;
            line-height: 1.2;
        }

        .metric-label {
            font-size: 13px;
            color: var(--color-mutedText);
            margin-top: 6px;
        }

        @media (max-width: 1024px) {
            .metrics-band {
                grid-template-columns: repeat(2, 1fr);
            }

            .metric-item:nth-child(2) {
                border-right: none;
            }
        }

        @media (max-width: 768px) {
            .metrics-band {
                grid-template-columns: 1fr;
            }

            .metric-item {
                border-right: none;
                border-bottom: 1px solid var(--color-border);
                padding-bottom: 16px;
            }

            .metric-item:last-child {
                border-bottom: none;
            }
        }

        /* News cards */
        .news-card {
            background: var(--color-card);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
        }

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

        .news-card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }

        .news-card-body {
            padding: 20px 22px;
        }

        .news-card-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--color-primary);
            background: #e8f4ec;
            padding: 2px 10px;
            border-radius: 4px;
            margin-bottom: 10px;
        }

        .news-card h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--color-dark);
            margin-bottom: 8px;
            line-height: 1.5;
        }

        .news-card p {
            font-size: 14px;
            color: var(--color-mutedText);
            line-height: 1.65;
        }

        /* Topic cards */
        .topic-card {
            background: var(--color-card);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
            position: relative;
            height: 100%;
        }

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

        .topic-card-img {
            width: 100%;
            height: 160px;
            object-fit: cover;
        }

        .topic-card-body {
            padding: 20px 22px;
        }

        .topic-card h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--color-dark);
            margin-bottom: 8px;
            line-height: 1.5;
        }

        .topic-card p {
            font-size: 14px;
            color: var(--color-mutedText);
            line-height: 1.65;
            margin-bottom: 12px;
        }

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

        .topic-card-link:hover {
            color: var(--color-dark);
        }

        /* FAQ */
        .faq-item {
            background: var(--color-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            margin-bottom: 12px;
            overflow: hidden;
            border: 1px solid var(--color-border);
            transition: all var(--transition-base);
        }

        .faq-item:hover {
            border-color: var(--color-primary);
        }

        .faq-question {
            padding: 20px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--color-dark);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            transition: all var(--transition-base);
        }

        .faq-question:hover {
            color: var(--color-primary);
        }

        .faq-question .faq-icon {
            flex-shrink: 0;
            transition: transform var(--transition-base);
            color: var(--color-mutedText);
            font-size: 14px;
        }

        .faq-item.open .faq-icon {
            transform: rotate(180deg);
            color: var(--color-primary);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.3s ease;
            padding: 0 24px;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        .faq-answer p {
            font-size: 15px;
            color: var(--color-mutedText);
            line-height: 1.75;
        }

        /* Subscribe */
        .subscribe-box {
            background: var(--color-card);
            border-radius: var(--radius-large);
            padding: 40px 36px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border);
            display: grid;
            grid-template-columns: 1fr auto;
            gap: 24px;
            align-items: center;
        }

        .subscribe-form {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        .subscribe-input {
            flex: 1;
            min-width: 220px;
            padding: 14px 18px;
            border: 1.5px solid var(--color-border);
            border-radius: var(--radius-btn);
            font-size: 15px;
            color: var(--color-bodyText);
            background: #ffffff;
            transition: all var(--transition-base);
        }

        .subscribe-input:focus {
            outline: none;
            border-color: var(--color-primary);
            box-shadow: 0 0 0 3px rgba(11, 122, 75, 0.1);
        }

        .subscribe-input::placeholder {
            color: #a0b0a5;
        }

        @media (max-width: 768px) {
            .subscribe-box {
                grid-template-columns: 1fr;
                padding: 28px 20px;
            }

            .subscribe-form {
                flex-direction: column;
            }

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

        /* CTA bottom */
        .cta-bottom {
            background: var(--color-dark);
            background-image: url('/assets/images/2fd1e56277180544.webp');
            background-size: cover;
            background-position: center;
            position: relative;
            padding: 72px 0;
        }

        .cta-bottom::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(10,59,46,0.88);
        }

        .cta-bottom .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }

        .cta-bottom h2 {
            font-size: 28px;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 12px;
        }

        .cta-bottom p {
            font-size: 16px;
            color: rgba(255,255,255,0.75);
            margin-bottom: 32px;
            line-height: 1.75;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }

        .cta-bottom .cta-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* Footer */
        .site-footer {
            background-color: var(--color-dark);
            color: rgba(255,255,255,0.7);
            padding-top: 56px;
            padding-bottom: 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }

        .footer-brand h3 {
            color: #ffffff;
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255,255,255,0.6);
            max-width: 320px;
        }

        .footer-col h4 {
            color: #ffffff;
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 14px;
            letter-spacing: 0.3px;
        }

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

        .footer-col ul li {
            margin-bottom: 8px;
        }

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

        .footer-col ul li a:hover {
            color: var(--color-secondary);
        }

        .footer-bottom {
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: rgba(255,255,255,0.5);
        }

        .footer-bottom-links {
            display: flex;
            gap: 16px;
            align-items: center;
            flex-wrap: wrap;
        }

        .footer-bottom-links a {
            color: rgba(255,255,255,0.5);
            font-size: 13px;
            transition: color var(--transition-base);
        }

        .footer-bottom-links a:hover {
            color: var(--color-secondary);
        }

        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 28px;
            }
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
        }

        /* Responsive card grids */
        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .card-grid-two {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            .section {
                padding: var(--section-padding-mobile) 0;
            }

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

            .section-title {
                font-size: 22px;
            }
        }

        /* Accessibility */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 3px solid var(--color-secondary);
            outline-offset: 2px;
        }

/* roulang page: category2 */
:root {
            --color-primary: #0B7A4B;
            --color-secondary: #F59E0B;
            --color-dark: #0A3B2E;
            --color-accent: #DC2626;
            --color-lightBg: #F4F8F5;
            --color-card: #FFFFFF;
            --color-bodyText: #1A2E24;
            --color-mutedText: #5A6B60;
            --color-border: #E0EAE3;
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-large: 16px;
            --shadow-card: 0 2px 8px rgba(10, 59, 46, 0.06);
            --shadow-card-hover: 0 8px 24px rgba(10, 59, 46, 0.12);
            --transition-base: 0.2s ease;
            --max-width: 1280px;
            --section-padding: 80px;
            --section-padding-mobile: 56px;
            --card-gap: 28px;
            --card-padding: 24px;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--color-bodyText);
            background-color: #ffffff;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-base);
        }

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            background: none;
        }

        input {
            font-family: inherit;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        .section {
            padding: var(--section-padding) 0;
        }

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

        .section-title {
            font-size: 26px;
            font-weight: 700;
            color: var(--color-dark);
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--color-mutedText);
            margin-bottom: 36px;
            max-width: 680px;
            line-height: 1.75;
        }

        .section-header {
            margin-bottom: 16px;
        }

        .section-header .section-subtitle {
            margin-bottom: 0;
        }

        .tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 500;
            color: var(--color-primary);
            background: #e8f4ec;
            padding: 4px 12px;
            border-radius: 20px;
            line-height: 1.4;
            letter-spacing: 0.4px;
        }

        .btn {
            display: inline-block;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            text-align: center;
            transition: all var(--transition-base);
            letter-spacing: 0.3px;
            line-height: 1.5;
        }

        .btn-primary {
            background-color: var(--color-primary);
            color: #ffffff;
            box-shadow: 0 2px 6px rgba(11, 122, 75, 0.25);
        }

        .btn-primary:hover {
            background-color: var(--color-dark);
            box-shadow: 0 6px 16px rgba(10, 59, 46, 0.3);
            transform: translateY(-2px);
        }

        .btn-primary:focus-visible {
            outline: 3px solid var(--color-secondary);
            outline-offset: 2px;
        }

        .btn-secondary {
            background: transparent;
            color: var(--color-primary);
            border: 1.5px solid var(--color-primary);
        }

        .btn-secondary:hover {
            background-color: var(--color-lightBg);
            border-color: var(--color-dark);
            color: var(--color-dark);
            transform: translateY(-2px);
        }

        .btn-secondary:focus-visible {
            outline: 3px solid var(--color-secondary);
            outline-offset: 2px;
        }

        .btn-light {
            background-color: #ffffff;
            color: var(--color-dark);
        }

        .btn-light:hover {
            background-color: var(--color-secondary);
            color: #ffffff;
            transform: translateY(-2px);
        }

        .card {
            background: var(--color-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: var(--card-padding);
            transition: all var(--transition-base);
            border: 1px solid rgba(0, 0, 0, 0.02);
        }

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

        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--card-gap);
        }

        .card-grid-two {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--card-gap);
        }

        .icon-badge {
            width: 48px;
            height: 48px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: #e8f4ec;
            color: var(--color-primary);
            font-size: 20px;
            flex-shrink: 0;
            transition: transform var(--transition-base);
        }

        .card:hover .icon-badge {
            transform: scale(1.06);
        }

        .icon-badge-orange {
            background: #fef3e2;
            color: var(--color-secondary);
        }

        .icon-badge-red {
            background: #fde8e8;
            color: var(--color-accent);
        }

        /* Navigation */
        .site-header {
            background-color: var(--color-dark);
            position: sticky;
            top: 0;
            z-index: 50;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.12);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            color: #ffffff;
            font-weight: 700;
            font-size: 20px;
            letter-spacing: 0.5px;
        }

        .nav-logo:hover {
            color: var(--color-secondary);
        }

        .logo-icon {
            width: 34px;
            height: 34px;
            background: var(--color-primary);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: #ffffff;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-links a {
            color: rgba(255, 255, 255, 0.82);
            font-size: 14.5px;
            font-weight: 500;
            padding: 6px 0;
            position: relative;
            transition: color var(--transition-base);
            letter-spacing: 0.3px;
        }

        .nav-links a:hover {
            color: var(--color-secondary);
        }

        .nav-links a.active {
            color: var(--color-secondary);
            font-weight: 600;
        }

        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 2px;
            background-color: var(--color-secondary);
            border-radius: 2px;
        }

        .nav-toggle {
            display: none;
            color: #ffffff;
            font-size: 22px;
            padding: 6px 10px;
            border-radius: 6px;
            transition: background var(--transition-base);
        }

        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }

        /* Breadcrumb */
        .breadcrumb-bar {
            background-color: #ffffff;
            border-bottom: 1px solid var(--color-border);
            padding: 12px 0;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 6px;
            font-size: 14px;
            color: var(--color-mutedText);
            overflow-x: auto;
            white-space: nowrap;
            -webkit-overflow-scrolling: touch;
        }

        .breadcrumb a {
            color: var(--color-mutedText);
            transition: color var(--transition-base);
        }

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

        .breadcrumb .separator {
            color: #b8c6bc;
            flex-shrink: 0;
        }

        .breadcrumb .current {
            color: var(--color-primary);
            font-weight: 600;
        }

        /* Hero for category page */
        .category-hero {
            background: linear-gradient(135deg, #0A3B2E 0%, #0B5C3F 55%, #0B7A4B 100%);
            padding: 64px 0 56px;
            position: relative;
            overflow: hidden;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -80px;
            width: 420px;
            height: 420px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(245, 158, 11, 0.18) 0%, transparent 70%);
            pointer-events: none;
        }

        .category-hero::after {
            content: '';
            position: absolute;
            bottom: -140px;
            left: -100px;
            width: 380px;
            height: 380px;
            border-radius: 50%;
            border: 2px dashed rgba(255, 255, 255, 0.12);
            pointer-events: none;
        }

        .category-hero-content {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: 1fr 380px;
            gap: 48px;
            align-items: center;
        }

        .category-hero h1 {
            font-size: 32px;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 16px;
            line-height: 1.4;
            letter-spacing: 0.5px;
        }

        .category-hero p {
            font-size: 16.5px;
            color: rgba(255, 255, 255, 0.85);
            line-height: 1.8;
            max-width: 620px;
            margin-bottom: 24px;
        }

        .category-hero-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .category-hero-stat {
            display: flex;
            align-items: center;
            gap: 8px;
            color: rgba(255, 255, 255, 0.8);
            font-size: 14px;
        }

        .category-hero-stat i {
            color: var(--color-secondary);
        }

        .category-hero-visual {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: var(--radius-large);
            padding: 28px;
            backdrop-filter: blur(2px);
        }

        .category-hero-visual h3 {
            color: #ffffff;
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 18px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .category-hero-visual h3 i {
            color: var(--color-secondary);
        }

        .hero-visual-item {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            color: rgba(255, 255, 255, 0.85);
            font-size: 14px;
        }

        .hero-visual-item:last-child {
            border-bottom: none;
        }

        .hero-visual-item .value {
            font-weight: 700;
            color: var(--color-secondary);
            font-size: 15px;
        }

        /* Term cards */
        .term-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }

        .term-card {
            background: #ffffff;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 20px 18px;
            text-align: center;
            transition: all var(--transition-base);
        }

        .term-card:hover {
            border-color: var(--color-primary);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }

        .term-card .term-icon {
            width: 44px;
            height: 44px;
            margin: 0 auto 12px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: #e8f4ec;
            color: var(--color-primary);
            font-size: 18px;
        }

        .term-card h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--color-dark);
            margin-bottom: 6px;
        }

        .term-card p {
            font-size: 13px;
            color: var(--color-mutedText);
            line-height: 1.6;
        }

        /* Analysis list cards */
        .analysis-card {
            display: grid;
            grid-template-columns: 220px 1fr;
            gap: 24px;
            background: #ffffff;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid rgba(0, 0, 0, 0.02);
            overflow: hidden;
            transition: all var(--transition-base);
        }

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

        .analysis-card-image {
            position: relative;
            min-height: 160px;
            background-size: cover;
            background-position: center;
        }

        .analysis-card-image .image-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 40%, rgba(10, 59, 46, 0.7) 100%);
            border-radius: 0;
        }

        .analysis-card-image .match-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--color-primary);
            color: #ffffff;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 16px;
            z-index: 1;
        }

        .analysis-card-body {
            padding: 24px 24px 24px 0;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .analysis-card-body .meta-info {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: var(--color-mutedText);
            margin-bottom: 10px;
            flex-wrap: wrap;
        }

        .analysis-card-body .meta-info span {
            display: flex;
            align-items: center;
            gap: 5px;
        }

        .analysis-card-body h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--color-dark);
            margin-bottom: 8px;
            line-height: 1.5;
        }

        .analysis-card-body p {
            font-size: 14.5px;
            color: var(--color-mutedText);
            line-height: 1.75;
            margin-bottom: 14px;
        }

        .analysis-card-body .card-link {
            color: var(--color-primary);
            font-size: 14px;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 6px;
            transition: all var(--transition-base);
        }

        .analysis-card-body .card-link:hover {
            color: var(--color-dark);
            gap: 10px;
        }

        /* Method steps */
        .method-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--card-gap);
            counter-reset: method-step;
        }

        .method-step {
            background: #ffffff;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 28px 22px;
            position: relative;
            border-top: 4px solid var(--color-primary);
            transition: all var(--transition-base);
        }

        .method-step:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }

        .method-step .step-number {
            font-size: 40px;
            font-weight: 800;
            color: #e8f4ec;
            line-height: 1;
            margin-bottom: 16px;
            letter-spacing: -1px;
        }

        .method-step h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--color-dark);
            margin-bottom: 10px;
        }

        .method-step p {
            font-size: 14px;
            color: var(--color-mutedText);
            line-height: 1.7;
        }

        /* Case study */
        .case-block {
            background: linear-gradient(135deg, var(--color-dark) 0%, #0B5C3F 100%);
            border-radius: var(--radius-large);
            padding: 48px;
            color: #ffffff;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
            position: relative;
            overflow: hidden;
        }

        .case-block::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -40px;
            width: 260px;
            height: 260px;
            border-radius: 50%;
            border: 2px dashed rgba(245, 158, 11, 0.25);
            pointer-events: none;
        }

        .case-block h3 {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 16px;
            color: #ffffff;
            letter-spacing: 0.3px;
        }

        .case-block p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.85);
            line-height: 1.8;
            margin-bottom: 12px;
        }

        .case-block .case-tag {
            display: inline-block;
            background: rgba(245, 158, 11, 0.2);
            color: var(--color-secondary);
            font-size: 13px;
            font-weight: 600;
            padding: 5px 14px;
            border-radius: 20px;
            margin-bottom: 16px;
        }

        .case-data-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
        }

        .case-data-item {
            background: rgba(255, 255, 255, 0.07);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 10px;
            padding: 20px;
            text-align: center;
        }

        .case-data-item .data-value {
            font-size: 28px;
            font-weight: 800;
            color: var(--color-secondary);
            line-height: 1.3;
        }

        .case-data-item .data-label {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 4px;
        }

        /* Tool recommendation */
        .tool-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .tool-card {
            background: #ffffff;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 22px 18px;
            text-align: center;
            border: 1px solid rgba(0, 0, 0, 0.02);
            transition: all var(--transition-base);
        }

        .tool-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
            border-color: var(--color-primary);
        }

        .tool-card .tool-icon {
            width: 52px;
            height: 52px;
            margin: 0 auto 14px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: #e8f4ec;
            color: var(--color-primary);
            font-size: 22px;
        }

        .tool-card h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--color-dark);
            margin-bottom: 8px;
        }

        .tool-card p {
            font-size: 13px;
            color: var(--color-mutedText);
            line-height: 1.6;
        }

        /* View more link */
        .view-more-wrapper {
            text-align: center;
            margin-top: 36px;
        }

        .view-more-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            color: var(--color-primary);
            padding: 12px 28px;
            border: 1.5px solid var(--color-primary);
            border-radius: var(--radius-btn);
            transition: all var(--transition-base);
        }

        .view-more-link:hover {
            background: var(--color-primary);
            color: #ffffff;
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(11, 122, 75, 0.3);
        }

        /* Bottom CTA */
        .cta-bottom {
            background: linear-gradient(135deg, #0A3B2E 0%, #0B5C3F 55%, #0B7A4B 100%);
            border-radius: var(--radius-large);
            padding: 56px 44px;
            text-align: center;
            color: #ffffff;
            position: relative;
            overflow: hidden;
        }

        .cta-bottom::before {
            content: '';
            position: absolute;
            top: -100px;
            left: -60px;
            width: 320px;
            height: 320px;
            border-radius: 50%;
            border: 2px dashed rgba(255, 255, 255, 0.15);
            pointer-events: none;
        }

        .cta-bottom::after {
            content: '';
            position: absolute;
            bottom: -80px;
            right: -40px;
            width: 280px;
            height: 280px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(245, 158, 11, 0.2) 0%, transparent 70%);
            pointer-events: none;
        }

        .cta-bottom h2 {
            font-size: 26px;
            font-weight: 700;
            margin-bottom: 14px;
            position: relative;
            z-index: 1;
        }

        .cta-bottom p {
            font-size: 15.5px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 520px;
            margin: 0 auto 28px;
            line-height: 1.75;
            position: relative;
            z-index: 1;
        }

        .cta-bottom .btn-group {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }

        /* Footer */
        .site-footer {
            background-color: var(--color-dark);
            color: rgba(255, 255, 255, 0.85);
            padding: 60px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .footer-brand h3 {
            font-size: 22px;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }

        .footer-brand p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            line-height: 1.8;
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 16px;
            font-weight: 600;
            color: #ffffff;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }

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

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

        .footer-col a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            transition: color var(--transition-base);
        }

        .footer-col a:hover {
            color: var(--color-secondary);
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            padding: 20px 0 24px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
        }

        .footer-bottom-links {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
        }

        .footer-bottom-links a {
            color: rgba(255, 255, 255, 0.7);
        }

        .footer-bottom-links a:hover {
            color: var(--color-secondary);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .category-hero-content {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .category-hero-visual {
                max-width: 500px;
            }
            .term-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .method-steps {
                grid-template-columns: repeat(2, 1fr);
            }
            .tool-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .case-block {
                grid-template-columns: 1fr;
                padding: 36px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            .nav-links {
                display: none;
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                flex-direction: column;
                background-color: var(--color-dark);
                padding: 16px 24px 24px;
                gap: 4px;
                border-top: 1px solid rgba(255, 255, 255, 0.1);
                box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links a {
                padding: 12px 0;
                font-size: 16px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            }
            .nav-links a.active::after {
                display: none;
            }
            .section {
                padding: var(--section-padding-mobile) 0;
            }
            .card-grid {
                grid-template-columns: 1fr;
            }
            .card-grid-two {
                grid-template-columns: 1fr;
            }
            .term-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .method-steps {
                grid-template-columns: 1fr;
            }
            .tool-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .analysis-card {
                grid-template-columns: 1fr;
            }
            .analysis-card-image {
                min-height: 180px;
            }
            .analysis-card-body {
                padding: 20px;
            }
            .category-hero {
                padding: 44px 0 40px;
            }
            .category-hero h1 {
                font-size: 26px;
            }
            .cta-bottom {
                padding: 40px 24px;
            }
            .case-block {
                padding: 28px 20px;
            }
            .case-data-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 520px) {
            .term-grid {
                grid-template-columns: 1fr;
            }
            .tool-grid {
                grid-template-columns: 1fr;
            }
            .case-data-grid {
                grid-template-columns: 1fr;
            }
            .category-hero h1 {
                font-size: 23px;
            }
            .cta-bottom h2 {
                font-size: 22px;
            }
            .container {
                padding: 0 16px;
            }
        }

/* roulang page: category1 */
:root {
            --color-primary: #0B7A4B;
            --color-secondary: #F59E0B;
            --color-dark: #0A3B2E;
            --color-accent: #DC2626;
            --color-lightBg: #F4F8F5;
            --color-card: #FFFFFF;
            --color-bodyText: #1A2E24;
            --color-mutedText: #5A6B60;
            --color-border: #E0EAE3;
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-large: 16px;
            --shadow-card: 0 2px 8px rgba(10, 59, 46, 0.06);
            --shadow-card-hover: 0 8px 24px rgba(10, 59, 46, 0.12);
            --transition-base: 0.2s ease;
            --max-width: 1280px;
            --section-padding: 80px;
            --section-padding-mobile: 56px;
            --card-gap: 28px;
            --card-padding: 24px;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--color-bodyText);
            background-color: #ffffff;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-base);
        }
        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            background: none;
        }
        input {
            font-family: inherit;
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .section {
            padding: var(--section-padding) 0;
        }
        .section-alt {
            background-color: var(--color-lightBg);
        }
        .section-title {
            font-size: 26px;
            font-weight: 700;
            color: var(--color-dark);
            margin-bottom: 12px;
            line-height: 1.4;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--color-mutedText);
            margin-bottom: 36px;
            max-width: 680px;
            line-height: 1.75;
        }
        .section-header {
            margin-bottom: 16px;
        }
        .section-header .section-subtitle {
            margin-bottom: 0;
        }
        .tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 500;
            color: var(--color-primary);
            background: #e8f4ec;
            padding: 4px 12px;
            border-radius: 20px;
            line-height: 1.4;
            letter-spacing: 0.4px;
        }
        .tag-orange {
            background: #fef3e2;
            color: #b45309;
        }
        .tag-red {
            background: #fde8e8;
            color: var(--color-accent);
        }
        .btn {
            display: inline-block;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            text-align: center;
            transition: all var(--transition-base);
            letter-spacing: 0.3px;
            line-height: 1.5;
        }
        .btn-primary {
            background-color: var(--color-primary);
            color: #ffffff;
            box-shadow: 0 2px 6px rgba(11, 122, 75, 0.25);
        }
        .btn-primary:hover {
            background-color: var(--color-dark);
            box-shadow: 0 6px 16px rgba(10, 59, 46, 0.3);
            transform: translateY(-2px);
        }
        .btn-primary:focus-visible {
            outline: 3px solid var(--color-secondary);
            outline-offset: 2px;
        }
        .btn-secondary {
            background: transparent;
            color: var(--color-primary);
            border: 1.5px solid var(--color-primary);
        }
        .btn-secondary:hover {
            background-color: var(--color-lightBg);
            border-color: var(--color-dark);
            color: var(--color-dark);
            transform: translateY(-2px);
        }
        .btn-secondary:focus-visible {
            outline: 3px solid var(--color-secondary);
            outline-offset: 2px;
        }
        .btn-light {
            background-color: #ffffff;
            color: var(--color-dark);
        }
        .btn-light:hover {
            background-color: var(--color-secondary);
            color: #ffffff;
            transform: translateY(-2px);
        }
        .card {
            background: var(--color-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: var(--card-padding);
            transition: all var(--transition-base);
            border: 1px solid rgba(0, 0, 0, 0.02);
        }
        .card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--card-gap);
        }
        .card-grid-two {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--card-gap);
        }
        .icon-badge {
            width: 48px;
            height: 48px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: #e8f4ec;
            color: var(--color-primary);
            font-size: 20px;
            flex-shrink: 0;
            transition: transform var(--transition-base);
        }
        .card:hover .icon-badge {
            transform: scale(1.06);
        }
        .icon-badge-orange {
            background: #fef3e2;
            color: var(--color-secondary);
        }
        .icon-badge-red {
            background: #fde8e8;
            color: var(--color-accent);
        }
        .site-header {
            background-color: var(--color-dark);
            position: sticky;
            top: 0;
            z-index: 50;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.12);
        }
        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            color: #ffffff;
            font-weight: 700;
            font-size: 18px;
            letter-spacing: 0.5px;
        }
        .logo-icon {
            width: 34px;
            height: 34px;
            border-radius: 50%;
            background: var(--color-primary);
            color: #ffffff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-links a {
            color: rgba(255, 255, 255, 0.82);
            font-size: 15px;
            font-weight: 500;
            letter-spacing: 0.3px;
            padding: 6px 2px;
            position: relative;
            transition: color var(--transition-base);
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 0;
            height: 2px;
            background: var(--color-secondary);
            transition: width var(--transition-base);
            border-radius: 2px;
        }
        .nav-links a:hover {
            color: var(--color-secondary);
        }
        .nav-links a:hover::after {
            width: 100%;
        }
        .nav-links a.active {
            color: var(--color-secondary);
            font-weight: 600;
        }
        .nav-links a.active::after {
            width: 100%;
        }
        .nav-toggle {
            display: none;
            color: #ffffff;
            font-size: 22px;
            padding: 6px;
            border-radius: 6px;
            border: 1px solid rgba(255, 255, 255, 0.2);
            background: rgba(255, 255, 255, 0.05);
            transition: background var(--transition-base);
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.12);
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 14px;
            color: var(--color-mutedText);
            padding: 16px 0;
            overflow-x: auto;
            white-space: nowrap;
            -webkit-overflow-scrolling: touch;
        }
        .breadcrumb a {
            color: var(--color-mutedText);
            transition: color var(--transition-base);
        }
        .breadcrumb a:hover {
            color: var(--color-primary);
        }
        .breadcrumb .separator {
            color: #b0bfb6;
            font-size: 12px;
        }
        .breadcrumb .current {
            color: var(--color-primary);
            font-weight: 600;
        }
        .section-page-header {
            padding: 32px 0 48px;
            background: linear-gradient(135deg, #f4f8f5 0%, #ffffff 55%, #fef3e2 100%);
            border-bottom: 1px solid var(--color-border);
        }
        .page-heading {
            font-size: 32px;
            font-weight: 700;
            color: var(--color-dark);
            margin: 0 0 12px;
            line-height: 1.3;
        }
        .page-heading .heading-highlight {
            color: var(--color-primary);
        }
        .page-lead {
            font-size: 16px;
            color: var(--color-mutedText);
            max-width: 760px;
            line-height: 1.8;
            margin: 0;
        }
        .match-card {
            background: var(--color-card);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
            border: 1px solid rgba(0, 0, 0, 0.02);
            display: flex;
            flex-direction: column;
        }
        .match-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }
        .match-card-media {
            position: relative;
            aspect-ratio: 16/9;
            overflow: hidden;
            background: #e8f4ec;
        }
        .match-card-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .match-card:hover .match-card-media img {
            transform: scale(1.04);
        }
        .match-card-badge {
            position: absolute;
            top: 14px;
            left: 14px;
            background: var(--color-dark);
            color: #ffffff;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 6px;
            letter-spacing: 0.5px;
        }
        .match-card-badge.hot {
            background: var(--color-accent);
        }
        .match-card-body {
            padding: 20px 22px 22px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .match-card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 10px;
        }
        .match-card-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--color-dark);
            margin: 0 0 8px;
            line-height: 1.45;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .match-card-desc {
            font-size: 14px;
            color: var(--color-mutedText);
            line-height: 1.7;
            margin: 0 0 16px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .match-card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: #8a9a90;
            margin-top: auto;
            padding-top: 12px;
            border-top: 1px solid var(--color-border);
        }
        .match-card-meta span {
            display: flex;
            align-items: center;
            gap: 5px;
        }
        .filter-bar {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 28px;
        }
        .filter-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 500;
            color: var(--color-mutedText);
            background: var(--color-card);
            border: 1px solid var(--color-border);
            padding: 8px 16px;
            border-radius: 20px;
            transition: all var(--transition-base);
            cursor: pointer;
        }
        .filter-btn:hover {
            color: var(--color-primary);
            border-color: var(--color-primary);
            background: #f4f8f5;
        }
        .filter-btn.active {
            background: var(--color-primary);
            color: #ffffff;
            border-color: var(--color-primary);
            font-weight: 600;
        }
        .stats-ribbon {
            background: var(--color-dark);
            border-radius: var(--radius-large);
            padding: 32px 28px;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stats-item {
            text-align: center;
            color: #ffffff;
        }
        .stats-number {
            font-size: 32px;
            font-weight: 700;
            color: var(--color-secondary);
            display: block;
            line-height: 1.2;
            letter-spacing: 0.5px;
        }
        .stats-label {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 6px;
            display: block;
        }
        .subscribe-box {
            background: linear-gradient(135deg, #f4f8f5 0%, #e8f4ec 100%);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-large);
            padding: 32px 28px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
        }
        .subscribe-form {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            flex: 1;
            max-width: 480px;
        }
        .subscribe-input {
            flex: 1;
            min-width: 200px;
            padding: 12px 16px;
            border: 1.5px solid var(--color-border);
            border-radius: var(--radius-btn);
            font-size: 15px;
            outline: none;
            transition: border-color var(--transition-base);
            background: #ffffff;
            color: var(--color-bodyText);
        }
        .subscribe-input:focus {
            border-color: var(--color-primary);
            box-shadow: 0 0 0 3px rgba(11, 122, 75, 0.1);
        }
        .topic-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--card-gap);
        }
        .topic-card {
            background: var(--color-card);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
            border: 1px solid rgba(0, 0, 0, 0.02);
        }
        .topic-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }
        .topic-card-media {
            aspect-ratio: 16/9;
            overflow: hidden;
            background: #e8f4ec;
        }
        .topic-card-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .topic-card:hover .topic-card-media img {
            transform: scale(1.04);
        }
        .topic-card-body {
            padding: 20px 22px;
        }
        .topic-card-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--color-dark);
            margin: 0 0 8px;
        }
        .topic-card-desc {
            font-size: 14px;
            color: var(--color-mutedText);
            line-height: 1.7;
            margin: 0;
        }
        .view-more-row {
            text-align: center;
            padding-top: 24px;
        }
        .site-footer {
            background-color: var(--color-dark);
            color: rgba(255, 255, 255, 0.75);
            padding: 56px 0 0;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand h3 {
            color: #ffffff;
            font-size: 20px;
            font-weight: 700;
            margin: 0 0 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            margin: 0;
            max-width: 320px;
            color: rgba(255, 255, 255, 0.65);
        }
        .footer-col h4 {
            color: #ffffff;
            font-size: 15px;
            font-weight: 600;
            margin: 0 0 14px;
            letter-spacing: 0.3px;
        }
        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .footer-col li {
            margin-bottom: 10px;
        }
        .footer-col a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            transition: color var(--transition-base);
        }
        .footer-col a:hover {
            color: var(--color-secondary);
        }
        .footer-bottom {
            padding: 20px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom-links {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom-links a {
            color: rgba(255, 255, 255, 0.5);
            transition: color var(--transition-base);
        }
        .footer-bottom-links a:hover {
            color: var(--color-secondary);
        }
        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .topic-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-ribbon {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }
        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            .nav-links {
                display: none;
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                background: var(--color-dark);
                flex-direction: column;
                align-items: flex-start;
                padding: 16px 24px 24px;
                gap: 0;
                box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
                border-top: 1px solid rgba(255, 255, 255, 0.08);
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links li {
                width: 100%;
            }
            .nav-links a {
                display: block;
                padding: 12px 0;
                font-size: 15px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            }
            .nav-links a::after {
                display: none;
            }
            .section {
                padding: var(--section-padding-mobile) 0;
            }
            .card-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .card-grid-two {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .topic-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .stats-ribbon {
                grid-template-columns: repeat(2, 1fr);
                padding: 22px 18px;
                gap: 16px;
            }
            .stats-number {
                font-size: 26px;
            }
            .page-heading {
                font-size: 26px;
            }
            .subscribe-box {
                padding: 24px 20px;
                flex-direction: column;
                align-items: flex-start;
            }
            .subscribe-form {
                max-width: 100%;
                width: 100%;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
            .footer-bottom-links {
                flex-wrap: wrap;
                gap: 8px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .section-title {
                font-size: 22px;
            }
            .stats-ribbon {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
                padding: 18px 14px;
            }
            .stats-number {
                font-size: 22px;
            }
            .match-card-body {
                padding: 16px 16px 18px;
            }
            .btn {
                padding: 10px 20px;
                font-size: 14px;
            }
            .filter-bar {
                gap: 6px;
            }
            .filter-btn {
                padding: 6px 12px;
                font-size: 13px;
            }
        }

/* roulang page: category3 */
:root {
            --color-primary: #0B7A4B;
            --color-secondary: #F59E0B;
            --color-dark: #0A3B2E;
            --color-accent: #DC2626;
            --color-lightBg: #F4F8F5;
            --color-card: #FFFFFF;
            --color-bodyText: #1A2E24;
            --color-mutedText: #5A6B60;
            --color-border: #E0EAE3;
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-large: 16px;
            --shadow-card: 0 2px 8px rgba(10, 59, 46, 0.06);
            --shadow-card-hover: 0 8px 24px rgba(10, 59, 46, 0.12);
            --transition-base: 0.2s ease;
            --max-width: 1280px;
            --section-padding: 80px;
            --section-padding-mobile: 56px;
            --card-gap: 28px;
            --card-padding: 24px;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--color-bodyText);
            background-color: #ffffff;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-base);
        }

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            background: none;
        }

        input {
            font-family: inherit;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        .section {
            padding: var(--section-padding) 0;
        }

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

        .section-title {
            font-size: 26px;
            font-weight: 700;
            color: var(--color-dark);
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--color-mutedText);
            margin-bottom: 36px;
            max-width: 680px;
            line-height: 1.75;
        }

        .section-header {
            margin-bottom: 16px;
        }

        .section-header .section-subtitle {
            margin-bottom: 0;
        }

        .tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 500;
            color: var(--color-primary);
            background: #e8f4ec;
            padding: 4px 12px;
            border-radius: 20px;
            line-height: 1.4;
            letter-spacing: 0.4px;
        }

        .btn {
            display: inline-block;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            text-align: center;
            transition: all var(--transition-base);
            letter-spacing: 0.3px;
            line-height: 1.5;
        }

        .btn-primary {
            background-color: var(--color-primary);
            color: #ffffff;
            box-shadow: 0 2px 6px rgba(11, 122, 75, 0.25);
        }

        .btn-primary:hover {
            background-color: var(--color-dark);
            box-shadow: 0 6px 16px rgba(10, 59, 46, 0.3);
            transform: translateY(-2px);
        }

        .btn-primary:focus-visible {
            outline: 3px solid var(--color-secondary);
            outline-offset: 2px;
        }

        .btn-secondary {
            background: transparent;
            color: var(--color-primary);
            border: 1.5px solid var(--color-primary);
        }

        .btn-secondary:hover {
            background-color: var(--color-lightBg);
            border-color: var(--color-dark);
            color: var(--color-dark);
            transform: translateY(-2px);
        }

        .btn-secondary:focus-visible {
            outline: 3px solid var(--color-secondary);
            outline-offset: 2px;
        }

        .btn-light {
            background-color: #ffffff;
            color: var(--color-dark);
        }

        .btn-light:hover {
            background-color: var(--color-secondary);
            color: #ffffff;
            transform: translateY(-2px);
        }

        .card {
            background: var(--color-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: var(--card-padding);
            transition: all var(--transition-base);
            border: 1px solid rgba(0, 0, 0, 0.02);
        }

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

        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--card-gap);
        }

        .card-grid-two {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--card-gap);
        }

        .icon-badge {
            width: 48px;
            height: 48px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: #e8f4ec;
            color: var(--color-primary);
            font-size: 20px;
            flex-shrink: 0;
            transition: transform var(--transition-base);
        }

        .card:hover .icon-badge {
            transform: scale(1.06);
        }

        .icon-badge-orange {
            background: #fef3e2;
            color: var(--color-secondary);
        }

        .icon-badge-red {
            background: #fde8e8;
            color: var(--color-accent);
        }

        /* Navigation */
        .site-header {
            background-color: var(--color-dark);
            position: sticky;
            top: 0;
            z-index: 50;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.12);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            color: #ffffff;
            font-weight: 700;
            font-size: 18px;
            letter-spacing: 0.5px;
        }

        .nav-logo:hover {
            color: var(--color-secondary);
        }

        .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 8px;
            background: var(--color-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: #ffffff;
        }

        .nav-toggle {
            display: none;
            color: #ffffff;
            font-size: 22px;
            padding: 4px;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 24px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-links li {
            margin: 0;
        }

        .nav-links a {
            color: rgba(255, 255, 255, 0.78);
            font-size: 14.5px;
            font-weight: 500;
            letter-spacing: 0.4px;
            transition: color var(--transition-base);
            padding: 6px 2px;
            border-bottom: 2px solid transparent;
        }

        .nav-links a:hover {
            color: var(--color-secondary);
        }

        .nav-links a.active {
            color: var(--color-secondary);
            border-bottom-color: var(--color-secondary);
        }

        /* Breadcrumb */
        .breadcrumb-bar {
            background-color: #fafcfa;
            border-bottom: 1px solid var(--color-border);
            padding: 14px 0;
        }

        .breadcrumb-nav {
            font-size: 14px;
            color: var(--color-mutedText);
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }

        .breadcrumb-nav a {
            color: var(--color-mutedText);
            transition: color var(--transition-base);
        }

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

        .breadcrumb-nav .breadcrumb-sep {
            color: #b0c0b5;
            font-size: 12px;
        }

        .breadcrumb-nav .current {
            color: var(--color-primary);
            font-weight: 600;
        }

        .breadcrumb-back {
            margin-left: auto;
            font-size: 13px;
            color: var(--color-mutedText);
            display: flex;
            align-items: center;
            gap: 4px;
            transition: color var(--transition-base);
        }

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

        /* Page header */
        .page-header {
            padding: 48px 0 24px;
        }

        .page-header .section-subtitle {
            margin-bottom: 0;
            font-size: 17px;
            max-width: 720px;
        }

        /* Difficulty tags */
        .diff-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: 4px;
            letter-spacing: 0.3px;
            line-height: 1.4;
        }

        .diff-beginner {
            background: #e8f4ec;
            color: #0B7A4B;
        }

        .diff-intermediate {
            background: #fef3e2;
            color: #B45309;
        }

        .diff-advanced {
            background: #fde8e8;
            color: #B91C1C;
        }

        /* Guide card */
        .guide-card {
            background: var(--color-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: all var(--transition-base);
            border: 1px solid rgba(0, 0, 0, 0.02);
            display: flex;
            flex-direction: column;
        }

        .guide-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }

        .guide-card-img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            background: var(--color-lightBg);
        }

        .guide-card-body {
            padding: 20px 22px 22px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .guide-card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 10px;
            flex-wrap: wrap;
        }

        .guide-card-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-dark);
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .guide-card-desc {
            font-size: 14.5px;
            color: var(--color-mutedText);
            line-height: 1.7;
            flex: 1;
        }

        /* Step flow */
        .step-list {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .step-item {
            background: var(--color-card);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            box-shadow: var(--shadow-card);
            border: 1px solid rgba(0, 0, 0, 0.02);
            transition: all var(--transition-base);
            position: relative;
        }

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

        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            border-radius: 10px;
            background: var(--color-primary);
            color: #ffffff;
            font-weight: 700;
            font-size: 18px;
            margin-bottom: 16px;
        }

        .step-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--color-dark);
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .step-desc {
            font-size: 14.5px;
            color: var(--color-mutedText);
            line-height: 1.7;
        }

        /* Path timeline */
        .path-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .path-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            background: var(--color-card);
            border-radius: var(--radius-card);
            padding: 20px 24px;
            box-shadow: var(--shadow-card);
            border: 1px solid rgba(0, 0, 0, 0.02);
            transition: all var(--transition-base);
        }

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

        .path-dot {
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--color-primary);
            flex-shrink: 0;
            margin-top: 6px;
        }

        .path-item.active .path-dot {
            background: var(--color-secondary);
            box-shadow: 0 0 0 4px rgba(245, 158, 11, 0.2);
        }

        .path-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--color-dark);
            margin-bottom: 4px;
        }

        .path-desc {
            font-size: 14.5px;
            color: var(--color-mutedText);
            line-height: 1.7;
        }

        /* Resource card */
        .resource-card {
            background: var(--color-card);
            border-radius: var(--radius-card);
            padding: 24px;
            box-shadow: var(--shadow-card);
            border: 1px solid rgba(0, 0, 0, 0.02);
            transition: all var(--transition-base);
            text-align: center;
        }

        .resource-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }

        .resource-icon {
            width: 52px;
            height: 52px;
            border-radius: 12px;
            background: var(--color-lightBg);
            color: var(--color-primary);
            font-size: 22px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 14px;
        }

        .resource-title {
            font-size: 15.5px;
            font-weight: 700;
            color: var(--color-dark);
            margin-bottom: 6px;
        }

        .resource-desc {
            font-size: 13.5px;
            color: var(--color-mutedText);
            line-height: 1.6;
        }

        /* Featured card */
        .featured-item {
            display: flex;
            align-items: center;
            gap: 16px;
            background: var(--color-card);
            border-radius: var(--radius-card);
            padding: 18px 20px;
            box-shadow: var(--shadow-card);
            border: 1px solid rgba(0, 0, 0, 0.02);
            transition: all var(--transition-base);
        }

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

        .featured-icon {
            width: 42px;
            height: 42px;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            background: #e8f4ec;
            color: var(--color-primary);
            flex-shrink: 0;
        }

        .featured-title {
            font-size: 15.5px;
            font-weight: 600;
            color: var(--color-dark);
            line-height: 1.4;
        }

        .featured-desc {
            font-size: 13.5px;
            color: var(--color-mutedText);
            line-height: 1.6;
        }

        /* Footer */
        .site-footer {
            background-color: var(--color-dark);
            color: rgba(255, 255, 255, 0.72);
            padding: 56px 0 0;
            margin-top: 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand h3 {
            color: #ffffff;
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.65);
        }

        .footer-col h4 {
            color: #ffffff;
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 14px;
            letter-spacing: 0.3px;
        }

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

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

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

        .footer-col a:hover {
            color: var(--color-secondary);
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            padding: 20px 0 28px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
        }

        .footer-bottom-links {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
        }

        .footer-bottom-links a {
            color: rgba(255, 255, 255, 0.55);
            transition: color var(--transition-base);
        }

        .footer-bottom-links a:hover {
            color: var(--color-secondary);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }

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

            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 28px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-padding: var(--section-padding-mobile);
                --card-gap: 16px;
                --card-padding: 20px;
            }

            .nav-toggle {
                display: block;
            }

            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                background: var(--color-dark);
                padding: 16px 24px 20px;
                gap: 8px;
                box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
            }

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

            .nav-links a {
                padding: 10px 0;
                display: block;
                font-size: 15px;
            }

            .nav-links a.active {
                border-bottom-color: transparent;
                color: var(--color-secondary);
            }

            .card-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .card-grid-two {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .step-list {
                grid-template-columns: 1fr;
                gap: 14px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }

            .breadcrumb-bar .container {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }

            .breadcrumb-back {
                margin-left: 0;
            }

            .page-header {
                padding: 32px 0 16px;
            }

            .path-item {
                flex-direction: column;
                gap: 10px;
                padding: 18px 20px;
            }

            .featured-item {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .section-title {
                font-size: 22px;
            }

            .guide-card-body {
                padding: 16px 18px 18px;
            }

            .resource-card {
                padding: 18px 16px;
            }

            .btn {
                padding: 10px 20px;
                font-size: 14px;
                width: 100%;
                display: block;
            }

            .btn-inline {
                width: auto;
                display: inline-block;
            }
        }

/* roulang page: category4 */
:root {
      --color-primary: #0B7A4B;
      --color-secondary: #F59E0B;
      --color-dark: #0A3B2E;
      --color-accent: #DC2626;
      --color-lightBg: #F4F8F5;
      --color-card: #FFFFFF;
      --color-bodyText: #1A2E24;
      --color-mutedText: #5A6B60;
      --color-border: #E0EAE3;
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-large: 16px;
      --shadow-card: 0 2px 8px rgba(10, 59, 46, 0.06);
      --shadow-card-hover: 0 8px 24px rgba(10, 59, 46, 0.12);
      --transition-base: 0.2s ease;
      --max-width: 1280px;
      --section-padding: 80px;
      --section-padding-mobile: 56px;
      --card-gap: 28px;
      --card-padding: 24px;
    }

    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }

    body {
      font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      font-size: 16px;
      line-height: 1.75;
      color: var(--color-bodyText);
      background-color: #ffffff;
    }

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

    a {
      color: inherit;
      text-decoration: none;
      transition: color var(--transition-base);
    }

    button {
      cursor: pointer;
      font-family: inherit;
      border: none;
      background: none;
    }

    input {
      font-family: inherit;
    }

    .container {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 24px;
    }

    .section {
      padding: var(--section-padding) 0;
    }

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

    .section-title {
      font-size: 26px;
      font-weight: 700;
      color: var(--color-dark);
      margin-bottom: 12px;
      line-height: 1.4;
    }

    .section-subtitle {
      font-size: 16px;
      color: var(--color-mutedText);
      margin-bottom: 36px;
      max-width: 680px;
      line-height: 1.75;
    }

    .section-header {
      margin-bottom: 16px;
    }

    .section-header .section-subtitle {
      margin-bottom: 0;
    }

    .btn {
      display: inline-block;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      font-size: 15px;
      font-weight: 600;
      text-align: center;
      transition: all var(--transition-base);
      letter-spacing: 0.3px;
      line-height: 1.5;
    }

    .btn-primary {
      background-color: var(--color-primary);
      color: #ffffff;
      box-shadow: 0 2px 6px rgba(11, 122, 75, 0.25);
    }

    .btn-primary:hover {
      background-color: var(--color-dark);
      box-shadow: 0 6px 16px rgba(10, 59, 46, 0.3);
      transform: translateY(-2px);
    }

    .btn-primary:focus-visible {
      outline: 3px solid var(--color-secondary);
      outline-offset: 2px;
    }

    .btn-secondary {
      background: transparent;
      color: var(--color-primary);
      border: 1.5px solid var(--color-primary);
    }

    .btn-secondary:hover {
      background-color: var(--color-lightBg);
      border-color: var(--color-dark);
      color: var(--color-dark);
      transform: translateY(-2px);
    }

    .btn-secondary:focus-visible {
      outline: 3px solid var(--color-secondary);
      outline-offset: 2px;
    }

    .site-header {
      background-color: var(--color-dark);
      position: sticky;
      top: 0;
      z-index: 100;
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.12);
    }

    .nav-container {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 68px;
    }

    .nav-logo {
      display: flex;
      align-items: center;
      gap: 8px;
      color: #ffffff;
      font-weight: 700;
      font-size: 18px;
      letter-spacing: 0.5px;
    }

    .nav-logo .logo-icon {
      width: 34px;
      height: 34px;
      background: var(--color-primary);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #ffffff;
      font-size: 16px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 4px;
      list-style: none;
    }

    .nav-links a {
      display: block;
      padding: 8px 14px;
      color: #d6e2dc;
      font-weight: 500;
      font-size: 15px;
      border-radius: 8px;
    }

    .nav-links a:hover {
      color: var(--color-secondary);
      background: rgba(255, 255, 255, 0.06);
    }

    .nav-links a.active {
      color: #ffffff;
      background: var(--color-primary);
    }

    .nav-toggle {
      display: none;
      color: #ffffff;
      font-size: 20px;
      background: none;
      border: none;
    }

    .breadcrumb-nav {
      padding: 16px 0;
      background: #ffffff;
      border-bottom: 1px solid var(--color-border);
    }

    .breadcrumb-inner {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 24px;
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 14px;
      color: var(--color-mutedText);
      flex-wrap: wrap;
    }

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

    .breadcrumb-inner .current {
      color: var(--color-primary);
      font-weight: 600;
    }

    .category-hero {
      padding: 48px 0 24px;
      background: #ffffff;
    }

    .category-hero .container {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .category-title {
      font-size: 32px;
      font-weight: 700;
      color: var(--color-dark);
      line-height: 1.35;
    }

    .category-lede {
      font-size: 16px;
      color: var(--color-mutedText);
      max-width: 800px;
      line-height: 1.8;
      border-left: 3px solid var(--color-primary);
      padding-left: 16px;
    }

    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: var(--card-gap);
    }

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: var(--card-gap);
    }

    .stat-card {
      background: var(--color-card);
      border-radius: var(--radius-card);
      padding: 22px;
      box-shadow: var(--shadow-card);
      transition: all var(--transition-base);
      text-align: center;
    }

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

    .stat-number {
      font-size: 28px;
      font-weight: 700;
      color: var(--color-primary);
      display: block;
      margin-bottom: 6px;
    }

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

    .timeline {
      display: flex;
      flex-direction: column;
      gap: 24px;
      margin-bottom: 24px;
    }

    .timeline-item {
      display: grid;
      grid-template-columns: 220px 1fr;
      gap: 20px;
      background: var(--color-card);
      border-radius: var(--radius-card);
      padding: 20px;
      box-shadow: var(--shadow-card);
      transition: all var(--transition-base);
      border: 1px solid rgba(0, 0, 0, 0.02);
    }

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

    .timeline-img {
      width: 100%;
      height: 140px;
      object-fit: cover;
      border-radius: 8px;
    }

    .timeline-content {
      display: flex;
      flex-direction: column;
      gap: 8px;
      justify-content: center;
    }

    .timeline-meta {
      display: flex;
      gap: 12px;
      align-items: center;
      font-size: 13px;
      color: var(--color-mutedText);
      flex-wrap: wrap;
    }

    .timeline-tag {
      display: inline-block;
      font-size: 12px;
      font-weight: 500;
      color: var(--color-primary);
      background: #e8f4ec;
      padding: 2px 10px;
      border-radius: 20px;
    }

    .timeline-title {
      font-size: 18px;
      font-weight: 600;
      color: var(--color-dark);
      line-height: 1.45;
    }

    .timeline-desc {
      color: var(--color-mutedText);
      font-size: 14px;
      line-height: 1.7;
    }

    .view-more {
      text-align: right;
    }

    .trend-list {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
    }

    .trend-item {
      background: var(--color-card);
      border-radius: var(--radius-card);
      padding: 20px;
      box-shadow: var(--shadow-card);
    }

    .trend-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 12px;
    }

    .trend-name {
      font-weight: 600;
      color: var(--color-bodyText);
    }

    .trend-value {
      color: var(--color-primary);
      font-weight: 700;
      font-size: 18px;
    }

    .trend-bar {
      height: 8px;
      background: var(--color-lightBg);
      border-radius: 20px;
      overflow: hidden;
    }

    .trend-bar-fill {
      height: 100%;
      background: var(--color-primary);
      border-radius: 20px;
    }

    .table-wrap {
      background: var(--color-card);
      border-radius: var(--radius-card);
      overflow-x: auto;
      box-shadow: var(--shadow-card);
    }

    .comparison-table {
      width: 100%;
      border-collapse: collapse;
      font-size: 14px;
    }

    .comparison-table th,
    .comparison-table td {
      padding: 14px 18px;
      text-align: left;
      border-bottom: 1px solid var(--color-border);
      white-space: nowrap;
    }

    .comparison-table th {
      background: var(--color-lightBg);
      color: var(--color-dark);
      font-weight: 600;
    }

    .comparison-table tr:last-child td {
      border-bottom: none;
    }

    .comparison-table .highlight {
      color: var(--color-primary);
      font-weight: 600;
    }

    .download-section {
      background-image: linear-gradient(rgba(10, 59, 46, 0.78), rgba(10, 59, 46, 0.78)), url('/assets/images/8627d79ec87909a8.webp');
      background-size: cover;
      background-position: center;
    }

    .download-inner {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 24px;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .download-text h2 {
      color: #ffffff;
      font-size: 24px;
      margin-bottom: 12px;
    }

    .download-text p {
      color: #dce8e1;
      line-height: 1.7;
    }

    .download-form {
      display: flex;
      gap: 12px;
      align-items: center;
      background: #ffffff;
      padding: 8px;
      border-radius: var(--radius-card);
    }

    .download-form input {
      flex: 1;
      padding: 12px 16px;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-btn);
      outline: none;
      font-size: 14px;
    }

    .download-form input:focus {
      border-color: var(--color-primary);
      box-shadow: 0 0 0 3px rgba(11, 122, 75, 0.12);
    }

    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .faq-item {
      background: var(--color-card);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      overflow: hidden;
      transition: all var(--transition-base);
    }

    .faq-question {
      width: 100%;
      padding: 18px 20px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 12px;
      font-weight: 600;
      color: var(--color-dark);
      cursor: pointer;
      text-align: left;
      background: none;
      border: none;
      font-size: 16px;
    }

    .faq-question:hover {
      color: var(--color-primary);
    }

    .faq-question i {
      transition: transform var(--transition-base);
      color: var(--color-mutedText);
    }

    .faq-item.active .faq-question i {
      transform: rotate(180deg);
      color: var(--color-primary);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.25s ease;
    }

    .faq-answer-inner {
      padding: 0 20px 18px;
      color: var(--color-mutedText);
      line-height: 1.7;
      font-size: 15px;
    }

    .faq-item.active .faq-answer {
      max-height: 180px;
    }

    .site-footer {
      background-color: var(--color-dark);
      color: #d6e2dc;
      padding: 48px 0 24px;
      margin-top: 0;
    }

    .footer-grid {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 24px;
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 32px;
    }

    .footer-brand h3 {
      color: #ffffff;
      font-size: 18px;
      margin-bottom: 12px;
    }

    .footer-brand p {
      font-size: 14px;
      line-height: 1.7;
      color: #b8cbc0;
    }

    .footer-col h4 {
      color: #ffffff;
      margin-bottom: 12px;
      font-size: 16px;
    }

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

    .footer-col li {
      margin-bottom: 8px;
    }

    .footer-col a {
      color: #b8cbc0;
      font-size: 14px;
    }

    .footer-col a:hover {
      color: var(--color-secondary);
    }

    .footer-bottom {
      max-width: var(--max-width);
      margin: 32px auto 0;
      padding: 16px 24px 0;
      border-top: 1px solid rgba(255, 255, 255, 0.12);
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      gap: 12px;
      font-size: 13px;
      color: #9eb2a6;
    }

    .footer-bottom a {
      color: #9eb2a6;
    }

    .footer-bottom a:hover {
      color: var(--color-secondary);
    }

    .footer-bottom-links {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      align-items: center;
    }

    @media (max-width: 1024px) {
      .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }

      .timeline-item {
        grid-template-columns: 1fr;
      }

      .timeline-img {
        height: 180px;
      }

      .download-inner {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 68px;
        left: 0;
        right: 0;
        background: var(--color-dark);
        flex-direction: column;
        padding: 12px 24px;
        gap: 0;
      }

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

      .nav-toggle {
        display: block;
      }

      .grid-4,
      .grid-2,
      .trend-list {
        grid-template-columns: 1fr;
      }

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

      .category-title {
        font-size: 28px;
      }

      .download-form {
        flex-direction: column;
      }

      .section {
        padding: var(--section-padding-mobile) 0;
      }
    }

    @media (max-width: 520px) {
      .footer-grid {
        grid-template-columns: 1fr;
      }

      .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
      }

      .timeline-meta {
        flex-wrap: wrap;
      }

      .view-more {
        text-align: left;
      }
    }

/* roulang page: category5 */
:root {
            --color-primary: #0B7A4B;
            --color-secondary: #F59E0B;
            --color-dark: #0A3B2E;
            --color-accent: #DC2626;
            --color-lightBg: #F4F8F5;
            --color-card: #FFFFFF;
            --color-bodyText: #1A2E24;
            --color-mutedText: #5A6B60;
            --color-border: #E0EAE3;
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-large: 16px;
            --shadow-card: 0 2px 8px rgba(10, 59, 46, 0.06);
            --shadow-card-hover: 0 8px 24px rgba(10, 59, 46, 0.12);
            --transition-base: 0.2s ease;
            --max-width: 1280px;
            --section-padding: 80px;
            --section-padding-mobile: 56px;
            --card-gap: 28px;
            --card-padding: 24px;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--color-bodyText);
            background-color: #ffffff;
            overflow-x: hidden;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-base);
        }

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            background: none;
        }

        input {
            font-family: inherit;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        .section {
            padding: var(--section-padding) 0;
        }
        .section-alt {
            background-color: var(--color-lightBg);
        }

        .section-title {
            font-size: 26px;
            font-weight: 700;
            color: var(--color-dark);
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--color-mutedText);
            margin-bottom: 36px;
            max-width: 680px;
            line-height: 1.75;
        }

        .section-header {
            margin-bottom: 16px;
        }
        .section-header .section-subtitle {
            margin-bottom: 0;
        }

        .tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 500;
            color: var(--color-primary);
            background: #e8f4ec;
            padding: 4px 12px;
            border-radius: 20px;
            line-height: 1.4;
            letter-spacing: 0.4px;
        }
        .tag-orange {
            color: #b45309;
            background: #fef3e2;
        }
        .tag-red {
            color: var(--color-accent);
            background: #fde8e8;
        }

        .btn {
            display: inline-block;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            text-align: center;
            transition: all var(--transition-base);
            letter-spacing: 0.3px;
            line-height: 1.5;
        }
        .btn-primary {
            background-color: var(--color-primary);
            color: #ffffff;
            box-shadow: 0 2px 6px rgba(11, 122, 75, 0.25);
        }
        .btn-primary:hover {
            background-color: var(--color-dark);
            box-shadow: 0 6px 16px rgba(10, 59, 46, 0.3);
            transform: translateY(-2px);
        }
        .btn-primary:focus-visible {
            outline: 3px solid var(--color-secondary);
            outline-offset: 2px;
        }
        .btn-secondary {
            background: transparent;
            color: var(--color-primary);
            border: 1.5px solid var(--color-primary);
        }
        .btn-secondary:hover {
            background-color: var(--color-lightBg);
            border-color: var(--color-dark);
            color: var(--color-dark);
            transform: translateY(-2px);
        }
        .btn-secondary:focus-visible {
            outline: 3px solid var(--color-secondary);
            outline-offset: 2px;
        }
        .btn-light {
            background-color: #ffffff;
            color: var(--color-dark);
        }
        .btn-light:hover {
            background-color: var(--color-secondary);
            color: #ffffff;
            transform: translateY(-2px);
        }

        .card {
            background: var(--color-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: var(--card-padding);
            transition: all var(--transition-base);
            border: 1px solid rgba(0,0,0,0.02);
        }
        .card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }

        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--card-gap);
        }
        .card-grid-two {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--card-gap);
        }
        .card-grid-four {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--card-gap);
        }

        .icon-badge {
            width: 48px;
            height: 48px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: #e8f4ec;
            color: var(--color-primary);
            font-size: 20px;
            flex-shrink: 0;
            transition: transform var(--transition-base);
        }
        .card:hover .icon-badge {
            transform: scale(1.06);
        }
        .icon-badge-orange {
            background: #fef3e2;
            color: var(--color-secondary);
        }
        .icon-badge-red {
            background: #fde8e8;
            color: var(--color-accent);
        }

        /* Navigation */
        .site-header {
            background-color: var(--color-dark);
            position: sticky;
            top: 0;
            z-index: 50;
            box-shadow: 0 2px 10px rgba(0,0,0,0.12);
        }
        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            color: #ffffff;
            font-weight: 700;
            font-size: 20px;
            letter-spacing: 0.5px;
        }
        .nav-logo .logo-icon {
            width: 34px;
            height: 34px;
            border-radius: 8px;
            background: var(--color-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: #ffffff;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
        }
        .nav-links a {
            color: #c8d9cf;
            font-size: 15px;
            font-weight: 500;
            padding: 6px 0;
            position: relative;
            transition: color var(--transition-base);
        }
        .nav-links a:hover {
            color: var(--color-secondary);
        }
        .nav-links a.active {
            color: var(--color-secondary);
            font-weight: 600;
        }
        .nav-links a.active::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 100%;
            height: 2px;
            background: var(--color-secondary);
            border-radius: 2px;
        }
        .nav-toggle {
            display: none;
            color: #ffffff;
            font-size: 24px;
            padding: 8px;
            border-radius: 6px;
            transition: background var(--transition-base);
        }
        .nav-toggle:hover {
            background: rgba(255,255,255,0.08);
        }

        /* Breadcrumb */
        .breadcrumb-wrapper {
            background: #ffffff;
            border-bottom: 1px solid var(--color-border);
            padding: 14px 0;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--color-mutedText);
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--color-mutedText);
            transition: color var(--transition-base);
        }
        .breadcrumb a:hover {
            color: var(--color-primary);
        }
        .breadcrumb .separator {
            color: #9aab9f;
            font-size: 12px;
        }
        .breadcrumb .current {
            color: var(--color-primary);
            font-weight: 600;
        }
        .breadcrumb .back-link {
            margin-left: auto;
            color: var(--color-primary);
            font-weight: 500;
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .breadcrumb .back-link:hover {
            color: var(--color-dark);
        }

        /* Page Header */
        .page-header {
            padding: 48px 0 40px;
            background: linear-gradient(135deg, #f0faf3 0%, #ffffff 100%);
            border-bottom: 1px solid var(--color-border);
        }
        .page-header h1 {
            font-size: 32px;
            font-weight: 700;
            color: var(--color-dark);
            margin-bottom: 12px;
            line-height: 1.3;
        }
        .page-header .intro-text {
            font-size: 16px;
            color: var(--color-mutedText);
            max-width: 720px;
            line-height: 1.8;
        }

        /* Step Cards */
        .step-card {
            position: relative;
            overflow: hidden;
        }
        .step-card .step-number {
            font-size: 40px;
            font-weight: 800;
            color: #e8f0ea;
            position: absolute;
            top: 12px;
            right: 16px;
            line-height: 1;
            user-select: none;
            pointer-events: none;
        }
        .step-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-dark);
            margin: 12px 0 8px;
        }
        .step-card p {
            font-size: 15px;
            color: var(--color-mutedText);
            line-height: 1.7;
        }

        /* Term Grid */
        .term-card {
            background: #ffffff;
            border-radius: 10px;
            padding: 16px 20px;
            border: 1px solid var(--color-border);
            box-shadow: 0 1px 4px rgba(10,59,46,0.04);
            transition: all var(--transition-base);
        }
        .term-card:hover {
            border-color: var(--color-primary);
            box-shadow: 0 4px 16px rgba(10,59,46,0.08);
            transform: translateY(-1px);
        }
        .term-card .term-name {
            font-size: 16px;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 4px;
        }
        .term-card .term-desc {
            font-size: 14px;
            color: var(--color-mutedText);
            line-height: 1.65;
        }

        /* Misconception List */
        .misconception-item {
            display: flex;
            gap: 16px;
            align-items: flex-start;
            padding: 18px 20px;
            background: #ffffff;
            border-radius: 10px;
            border-left: 4px solid var(--color-accent);
            box-shadow: 0 1px 4px rgba(10,59,46,0.05);
            margin-bottom: 16px;
        }
        .misconception-item .mis-icon {
            width: 36px;
            height: 36px;
            border-radius: 8px;
            background: #fde8e8;
            color: var(--color-accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            flex-shrink: 0;
        }
        .misconception-item h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--color-dark);
            margin-bottom: 4px;
        }
        .misconception-item p {
            font-size: 14px;
            color: var(--color-mutedText);
            line-height: 1.65;
        }

        /* Community Banner */
        .community-banner {
            background: var(--color-dark);
            border-radius: var(--radius-large);
            padding: 40px 36px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
            box-shadow: 0 8px 24px rgba(10,59,46,0.15);
        }
        .community-banner .cb-text h3 {
            font-size: 22px;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 8px;
        }
        .community-banner .cb-text p {
            color: #c8d9cf;
            font-size: 15px;
            line-height: 1.7;
            max-width: 520px;
        }
        .community-banner .cb-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            color: var(--color-secondary);
            background: rgba(255,255,255,0.08);
            padding: 10px 20px;
            border-radius: 8px;
            transition: all var(--transition-base);
        }
        .community-banner .cb-link:hover {
            background: rgba(255,255,255,0.16);
            color: #ffffff;
            transform: translateY(-2px);
        }

        /* CTA Section */
        .cta-section {
            background: linear-gradient(135deg, #0B7A4B 0%, #0A3B2E 100%);
            border-radius: var(--radius-large);
            padding: 48px 40px;
            text-align: center;
            box-shadow: 0 12px 32px rgba(10,59,46,0.2);
        }
        .cta-section h2 {
            font-size: 26px;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 12px;
        }
        .cta-section p {
            color: #d0e5d8;
            font-size: 16px;
            max-width: 600px;
            margin: 0 auto 24px;
            line-height: 1.75;
        }
        .cta-section .cta-buttons {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* Footer */
        .site-footer {
            background-color: var(--color-dark);
            color: #c8d9cf;
            padding: 56px 0 32px;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }
        .footer-brand h3 {
            font-size: 22px;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.75;
            color: #a8bcaf;
            max-width: 360px;
        }
        .footer-col h4 {
            font-size: 16px;
            font-weight: 600;
            color: #ffffff;
            margin-bottom: 14px;
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-col ul a {
            font-size: 14px;
            color: #a8bcaf;
            transition: color var(--transition-base);
        }
        .footer-col ul a:hover {
            color: var(--color-secondary);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: #8fa69a;
        }
        .footer-bottom-links {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
        }
        .footer-bottom-links a {
            color: #8fa69a;
            transition: color var(--transition-base);
        }
        .footer-bottom-links a:hover {
            color: var(--color-secondary);
        }

        /* View More */
        .view-more-wrap {
            text-align: center;
            margin-top: 28px;
        }
        .view-more-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            color: var(--color-primary);
            padding: 10px 24px;
            border: 1.5px solid var(--color-primary);
            border-radius: 8px;
            transition: all var(--transition-base);
        }
        .view-more-link:hover {
            background: var(--color-primary);
            color: #ffffff;
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(11,122,75,0.25);
        }
        .view-more-link:focus-visible {
            outline: 3px solid var(--color-secondary);
            outline-offset: 2px;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .card-grid-four {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-padding: var(--section-padding-mobile);
                --card-gap: 16px;
                --card-padding: 20px;
            }
            .nav-toggle {
                display: block;
            }
            .nav-links {
                display: none;
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                background: var(--color-dark);
                flex-direction: column;
                align-items: flex-start;
                gap: 0;
                padding: 12px 24px 20px;
                box-shadow: 0 8px 20px rgba(0,0,0,0.2);
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links li {
                width: 100%;
            }
            .nav-links a {
                display: block;
                width: 100%;
                padding: 10px 0;
                font-size: 16px;
            }
            .nav-links a.active::after {
                bottom: 4px;
            }
            .breadcrumb .back-link {
                margin-left: 0;
                width: 100%;
                justify-content: flex-start;
                margin-top: 4px;
            }
            .page-header {
                padding: 32px 0 28px;
            }
            .page-header h1 {
                font-size: 26px;
            }
            .card-grid {
                grid-template-columns: 1fr;
            }
            .card-grid-two {
                grid-template-columns: 1fr;
            }
            .card-grid-four {
                grid-template-columns: 1fr;
            }
            .community-banner {
                flex-direction: column;
                align-items: flex-start;
                padding: 28px 24px;
            }
            .cta-section {
                padding: 32px 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
            .footer-bottom-links {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
            }
        }

        @media (max-width: 520px) {
            .section {
                padding: 40px 0;
            }
            .section-title {
                font-size: 22px;
            }
            .btn {
                width: 100%;
                padding: 12px 20px;
            }
            .cta-section .cta-buttons {
                flex-direction: column;
                width: 100%;
            }
            .cta-section .cta-buttons .btn {
                width: 100%;
            }
            .view-more-link {
                width: 100%;
                justify-content: center;
            }
        }