/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #0f2b4a;
            --primary-light: #1a3f64;
            --primary-dark: #091e33;
            --accent: #c99a3e;
            --accent-light: #e0b45a;
            --accent-dark: #a87d2e;
            --bg-light: #f5f7fa;
            --bg-white: #ffffff;
            --bg-dark: #0a1a2e;
            --text-primary: #1a1a2e;
            --text-secondary: #4a5568;
            --text-muted: #8896ab;
            --text-inverse: #ffffff;
            --border-color: #e2e8f0;
            --border-light: #f0f2f5;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
            --shadow-lg: 0 8px 32px rgba(0,0,0,0.10);
            --shadow-xl: 0 16px 48px rgba(0,0,0,0.12);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --container-max: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-light);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--accent); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-md); }
        button, input, textarea { font-family: inherit; font-size: inherit; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text-primary); }
        h1 { font-size: 2.8rem; letter-spacing: -0.01em; }
        h2 { font-size: 2.2rem; letter-spacing: -0.005em; }
        h3 { font-size: 1.5rem; }
        h4 { font-size: 1.2rem; }
        p { margin-bottom: 1rem; color: var(--text-secondary); }

        /* ===== Container ===== */
        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) { .container { padding: 0 16px; } }

        /* ===== Section ===== */
        .section {
            padding: 80px 0;
        }
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 {
            position: relative;
            display: inline-block;
            margin-bottom: 16px;
        }
        .section-title h2::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: var(--accent);
            border-radius: 2px;
            margin: 12px auto 0;
        }
        .section-title p {
            max-width: 680px;
            margin: 0 auto;
            font-size: 1.1rem;
            color: var(--text-muted);
        }
        .section-alt {
            background: var(--bg-white);
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-inverse);
        }
        .section-dark .section-title h2,
        .section-dark .section-title p { color: var(--text-inverse); }
        .section-dark .section-title h2::after { background: var(--accent); }

        @media (max-width: 768px) {
            .section { padding: 48px 0; }
            h1 { font-size: 2rem; }
            h2 { font-size: 1.7rem; }
            h3 { font-size: 1.25rem; }
            .section-title { margin-bottom: 32px; }
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 32px;
            font-weight: 600;
            font-size: 1rem;
            line-height: 1.4;
            border: none;
            border-radius: var(--radius-md);
            cursor: pointer;
            transition: all var(--transition);
            text-align: center;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--accent);
            color: var(--text-inverse);
            box-shadow: 0 4px 14px rgba(201, 154, 62, 0.35);
        }
        .btn-primary:hover {
            background: var(--accent-light);
            color: var(--text-inverse);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(201, 154, 62, 0.45);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(201, 154, 62, 0.3);
        }
        .btn-outline {
            background: transparent;
            color: var(--text-inverse);
            border: 2px solid var(--text-inverse);
        }
        .btn-outline:hover {
            background: var(--text-inverse);
            color: var(--primary);
            transform: translateY(-2px);
        }
        .btn-outline:active {
            transform: translateY(0);
        }
        .btn-ghost {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--border-color);
        }
        .btn-ghost:hover {
            border-color: var(--accent);
            color: var(--accent);
            transform: translateY(-2px);
        }
        .btn-sm {
            padding: 10px 20px;
            font-size: 0.9rem;
        }
        .btn-lg {
            padding: 18px 40px;
            font-size: 1.1rem;
        }
        @media (max-width: 480px) {
            .btn { padding: 12px 24px; font-size: 0.95rem; }
            .btn-lg { padding: 14px 28px; font-size: 1rem; }
        }

        /* ===== Header / Navigation ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(15, 43, 74, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255,255,255,0.08);
            height: var(--header-height);
            transition: background var(--transition);
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text-inverse);
            letter-spacing: 0.02em;
        }
        .header-logo:hover {
            color: var(--accent);
        }
        .header-logo .logo-icon {
            width: 36px;
            height: 36px;
            background: var(--accent);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 900;
            font-size: 1.2rem;
            color: var(--primary-dark);
            flex-shrink: 0;
        }
        .nav-main {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-main a {
            display: inline-flex;
            align-items: center;
            padding: 8px 20px;
            font-size: 0.95rem;
            font-weight: 500;
            color: rgba(255,255,255,0.78);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            white-space: nowrap;
        }
        .nav-main a:hover {
            color: var(--text-inverse);
            background: rgba(255,255,255,0.08);
        }
        .nav-main a.active {
            color: var(--text-inverse);
            background: rgba(201, 154, 62, 0.2);
            border: 1px solid rgba(201, 154, 62, 0.25);
        }
        .nav-cta {
            margin-left: 8px;
        }
        .nav-cta .btn {
            padding: 10px 24px;
            font-size: 0.9rem;
        }

        /* Mobile nav toggle */
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
        }
        .nav-toggle span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--text-inverse);
            border-radius: 2px;
            transition: all var(--transition);
        }
        .nav-toggle.active span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
        .nav-toggle.active span:nth-child(2) { opacity: 0; }
        .nav-toggle.active span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

        @media (max-width: 768px) {
            .nav-toggle { display: flex; }
            .nav-main {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(10, 26, 46, 0.98);
                backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 20px 24px;
                gap: 4px;
                transform: translateY(-120%);
                opacity: 0;
                transition: all 0.35s cubic-bezier(0.4,0,0.2,1);
                border-bottom: 1px solid rgba(255,255,255,0.06);
                pointer-events: none;
            }
            .nav-main.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-main a {
                padding: 14px 16px;
                width: 100%;
                font-size: 1.05rem;
                border-radius: var(--radius-sm);
            }
            .nav-cta {
                margin-left: 0;
                margin-top: 8px;
                width: 100%;
            }
            .nav-cta .btn {
                width: 100%;
                justify-content: center;
            }
            .header-logo {
                font-size: 1.15rem;
            }
            .header-logo .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 1rem;
            }
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 88vh;
            display: flex;
            align-items: center;
            padding: calc(var(--header-height) + 40px) 0 80px;
            background: var(--primary-dark);
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            opacity: 0.25;
            pointer-events: none;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(9,30,51,0.92) 0%, rgba(15,43,74,0.70) 50%, rgba(10,26,46,0.88) 100%);
            pointer-events: none;
        }
        .hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 18px;
            background: rgba(201, 154, 62, 0.15);
            border: 1px solid rgba(201, 154, 62, 0.25);
            border-radius: 50px;
            font-size: 0.85rem;
            color: var(--accent-light);
            margin-bottom: 28px;
            letter-spacing: 0.03em;
        }
        .hero h1 {
            font-size: 3.4rem;
            font-weight: 800;
            color: var(--text-inverse);
            max-width: 880px;
            margin: 0 auto 20px;
            letter-spacing: -0.015em;
            line-height: 1.2;
        }
        .hero h1 span {
            color: var(--accent);
        }
        .hero p {
            font-size: 1.2rem;
            color: rgba(255,255,255,0.72);
            max-width: 640px;
            margin: 0 auto 36px;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .hero-stats {
            display: flex;
            justify-content: center;
            gap: 48px;
            margin-top: 56px;
            flex-wrap: wrap;
        }
        .hero-stat {
            text-align: center;
        }
        .hero-stat .num {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
        }
        .hero-stat .label {
            font-size: 0.9rem;
            color: rgba(255,255,255,0.55);
            margin-top: 4px;
        }
        @media (max-width: 768px) {
            .hero { min-height: 70vh; padding: calc(var(--header-height) + 24px) 0 48px; }
            .hero h1 { font-size: 2.2rem; }
            .hero p { font-size: 1.05rem; }
            .hero-stats { gap: 24px; margin-top: 36px; }
            .hero-stat .num { font-size: 1.8rem; }
        }
        @media (max-width: 480px) {
            .hero h1 { font-size: 1.8rem; }
            .hero p { font-size: 0.95rem; }
            .hero-actions { flex-direction: column; width: 100%; }
            .hero-actions .btn { width: 100%; }
        }

        /* ===== Cards ===== */
        .card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 32px 28px;
            transition: all var(--transition);
            border: 1px solid var(--border-light);
        }
        .card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
        }
        .card-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-sm);
            background: rgba(201, 154, 62, 0.10);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            color: var(--accent);
            margin-bottom: 16px;
        }
        .card h3 {
            margin-bottom: 12px;
            font-size: 1.25rem;
        }
        .card p {
            font-size: 0.95rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }

        /* ===== Grid ===== */
        .grid-2 {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
        }
        .grid-3 {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 28px;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr 1fr;
            gap: 24px;
        }
        @media (max-width: 992px) {
            .grid-4 { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .grid-2 { grid-template-columns: 1fr; gap: 24px; }
            .grid-3 { grid-template-columns: 1fr 1fr; gap: 20px; }
            .grid-4 { grid-template-columns: 1fr 1fr; gap: 20px; }
        }
        @media (max-width: 520px) {
            .grid-3 { grid-template-columns: 1fr; }
            .grid-4 { grid-template-columns: 1fr; }
        }

        /* ===== Image & Text Block ===== */
        .block-image-text {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }
        .block-image-text .img-wrap {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }
        .block-image-text .img-wrap img {
            width: 100%;
            height: 400px;
            object-fit: cover;
            border-radius: var(--radius-lg);
        }
        .block-image-text .text-wrap h2 {
            margin-bottom: 20px;
        }
        .block-image-text .text-wrap p {
            font-size: 1.05rem;
            margin-bottom: 16px;
        }
        .block-image-text .text-wrap .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 20px;
        }
        .block-image-text .text-wrap .tag-list span {
            padding: 4px 14px;
            background: rgba(201, 154, 62, 0.08);
            border: 1px solid rgba(201, 154, 62, 0.15);
            border-radius: 50px;
            font-size: 0.85rem;
            color: var(--accent-dark);
        }
        @media (max-width: 768px) {
            .block-image-text { grid-template-columns: 1fr; gap: 32px; }
            .block-image-text .img-wrap img { height: 260px; }
            .block-image-text.reverse .img-wrap { order: -1; }
        }

        /* ===== Steps ===== */
        .steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .step-item {
            text-align: center;
            padding: 28px 20px;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            position: relative;
        }
        .step-item:hover {
            box-shadow: var(--shadow-md);
        }
        .step-item::before {
            counter-increment: step;
            content: "0" counter(step);
            display: block;
            font-size: 2.6rem;
            font-weight: 800;
            color: rgba(201, 154, 62, 0.12);
            line-height: 1;
            margin-bottom: 8px;
            letter-spacing: -0.03em;
        }
        .step-item .step-icon {
            font-size: 2rem;
            color: var(--accent);
            margin-bottom: 12px;
        }
        .step-item h4 {
            font-size: 1.1rem;
            margin-bottom: 8px;
        }
        .step-item p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }
        @media (max-width: 768px) {
            .steps { grid-template-columns: 1fr 1fr; gap: 16px; }
        }
        @media (max-width: 480px) {
            .steps { grid-template-columns: 1fr; }
        }

        /* ===== CMS List ===== */
        .cms-list {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 24px;
        }
        .cms-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .cms-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
        }
        .cms-card .cms-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-radius: 0;
        }
        .cms-card .cms-body {
            padding: 20px 22px 24px;
        }
        .cms-card .cms-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.82rem;
            color: var(--text-muted);
            margin-bottom: 10px;
        }
        .cms-card .cms-meta .cms-cat {
            padding: 2px 10px;
            background: rgba(201, 154, 62, 0.08);
            border-radius: 50px;
            color: var(--accent-dark);
            font-weight: 500;
        }
        .cms-card h3 {
            font-size: 1.1rem;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .cms-card h3 a {
            color: var(--text-primary);
        }
        .cms-card h3 a:hover {
            color: var(--accent);
        }
        .cms-card .cms-excerpt {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 0;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .cms-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 48px 24px;
            color: var(--text-muted);
            font-size: 1.05rem;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px dashed var(--border-color);
        }
        @media (max-width: 768px) {
            .cms-list { grid-template-columns: 1fr 1fr; gap: 16px; }
        }
        @media (max-width: 520px) {
            .cms-list { grid-template-columns: 1fr; }
            .cms-card .cms-img { height: 200px; }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            font-weight: 600;
            font-size: 1.05rem;
            cursor: pointer;
            color: var(--text-primary);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            gap: 16px;
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: rgba(201, 154, 62, 0.03);
        }
        .faq-question .faq-toggle {
            font-size: 1.2rem;
            color: var(--accent);
            flex-shrink: 0;
            transition: transform var(--transition);
        }
        .faq-item.open .faq-toggle {
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
        }
        .faq-answer-inner {
            padding: 0 24px 20px;
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.75;
        }
        .faq-item.open .faq-answer {
            max-height: 400px;
        }
        .faq-item.open .faq-answer-inner {
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-block {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-light) 100%);
            border-radius: var(--radius-lg);
            padding: 60px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-block::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(201,154,62,0.08) 0%, transparent 70%);
            pointer-events: none;
        }
        .cta-block h2 {
            color: var(--text-inverse);
            font-size: 2rem;
            margin-bottom: 16px;
        }
        .cta-block p {
            color: rgba(255,255,255,0.72);
            font-size: 1.1rem;
            max-width: 560px;
            margin: 0 auto 28px;
        }
        .cta-block .btn {
            font-size: 1.05rem;
            padding: 16px 40px;
        }
        @media (max-width: 768px) {
            .cta-block { padding: 40px 24px; }
            .cta-block h2 { font-size: 1.6rem; }
            .cta-block p { font-size: 1rem; }
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.7);
            padding: 48px 0 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }
        .footer-brand .footer-logo {
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--text-inverse);
            display: inline-block;
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: rgba(255,255,255,0.5);
            max-width: 300px;
        }
        .footer-col h4 {
            font-size: 1rem;
            color: var(--text-inverse);
            margin-bottom: 16px;
            font-weight: 600;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            color: rgba(255,255,255,0.55);
            font-size: 0.9rem;
            transition: color var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.06);
            padding-top: 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.35);
        }
        .footer-bottom a {
            color: rgba(255,255,255,0.35);
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }
        @media (max-width: 768px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
            .footer-brand { grid-column: 1 / -1; }
        }
        @media (max-width: 480px) {
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }

        /* ===== Utility ===== */
        .text-center { text-align: center; }
        .mt-16 { margin-top: 16px; }
        .mt-24 { margin-top: 24px; }
        .mt-32 { margin-top: 32px; }
        .mt-48 { margin-top: 48px; }
        .mb-16 { margin-bottom: 16px; }
        .mb-24 { margin-bottom: 24px; }
        .gap-8 { gap: 8px; }
        .gap-12 { gap: 12px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }

        /* ===== Responsive extras ===== */
        @media (max-width: 992px) {
            .container { padding: 0 20px; }
        }
        @media (max-width: 480px) {
            .section { padding: 36px 0; }
            h1 { font-size: 1.7rem; }
            h2 { font-size: 1.4rem; }
            .card { padding: 24px 20px; }
            .cms-card .cms-body { padding: 16px 18px 20px; }
        }

        /* ===== Accessibility ===== */
        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar { width: 8px; }
        ::-webkit-scrollbar-track { background: var(--bg-light); }
        ::-webkit-scrollbar-thumb { background: var(--text-muted); border-radius: 4px; }
        ::-webkit-scrollbar-thumb:hover { background: var(--text-secondary); }

/* roulang page: article */
:root {
            --primary: #1a3a6b;
            --primary-light: #2a5a9e;
            --primary-dark: #0f2444;
            --accent: #e8b830;
            --accent-light: #f0d060;
            --accent-dark: #c9a020;
            --bg: #ffffff;
            --bg-alt: #f5f7fa;
            --bg-dark: #0f1928;
            --text: #1a1a2e;
            --text-light: #5a6a7e;
            --text-white: #f0f4f8;
            --border: #e2e8f0;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 20px rgba(0,0,0,0.06);
            --shadow-lg: 0 12px 48px rgba(0,0,0,0.10);
            --shadow-hover: 0 8px 32px rgba(0,0,0,0.12);
            --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
            --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --max-width: 1200px;
        }
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font);
            color: var(--text);
            background: var(--bg);
            line-height: 1.7;
            font-size: 16px;
            overflow-x: hidden;
        }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-light); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        ul, ol { list-style: none; }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .container-narrow {
            max-width: 820px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header / Nav ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255,255,255,0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            transition: var(--transition);
            height: 68px;
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }
        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            color: var(--primary-dark);
            letter-spacing: -0.3px;
        }
        .header-logo:hover { color: var(--primary); }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            border-radius: var(--radius-sm);
            font-size: 20px;
            font-weight: 700;
        }
        .nav-main {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-main a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-light);
            transition: var(--transition);
            position: relative;
        }
        .nav-main a:hover { color: var(--primary); background: var(--bg-alt); }
        .nav-main a.active {
            color: var(--primary);
            background: rgba(26,58,107,0.08);
            font-weight: 600;
        }
        .nav-main a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--accent);
            border-radius: 4px;
        }
        .nav-cta { margin-left: 12px; }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 32px;
            border-radius: var(--radius-sm);
            font-size: 16px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            text-align: center;
            line-height: 1.3;
        }
        .btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-hover); }
        .btn:active { transform: translateY(0); }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
        }
        .btn-primary:hover { background: linear-gradient(135deg, var(--primary-dark), var(--primary)); color: #fff; }
        .btn-accent {
            background: linear-gradient(135deg, var(--accent), var(--accent-light));
            color: var(--primary-dark);
        }
        .btn-accent:hover { background: linear-gradient(135deg, var(--accent-dark), var(--accent)); color: var(--primary-dark); }
        .btn-outline {
            background: transparent;
            border: 2px solid var(--primary);
            color: var(--primary);
        }
        .btn-outline:hover { background: var(--primary); color: #fff; }
        .btn-sm { padding: 8px 20px; font-size: 14px; }
        .btn-lg { padding: 16px 44px; font-size: 18px; }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .nav-toggle span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--text);
            border-radius: 4px;
            transition: var(--transition);
        }
        .nav-toggle:hover { background: var(--bg-alt); }

        /* ===== Article Hero ===== */
        .article-hero {
            padding: 120px 0 60px;
            background: linear-gradient(135deg, var(--bg-alt) 0%, #e8edf5 100%);
            position: relative;
            overflow: hidden;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -20%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(26,58,107,0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .article-hero .container-narrow {
            position: relative;
            z-index: 1;
        }
        .article-hero .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-light);
            margin-bottom: 24px;
            flex-wrap: wrap;
        }
        .article-hero .breadcrumb a { color: var(--primary); }
        .article-hero .breadcrumb span { color: var(--text-light); }
        .article-hero .breadcrumb .sep { color: var(--border); }
        .article-hero .meta-info {
            display: flex;
            align-items: center;
            gap: 20px;
            font-size: 14px;
            color: var(--text-light);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .article-hero .meta-info i { margin-right: 6px; color: var(--accent); }
        .article-hero h1 {
            font-size: 36px;
            font-weight: 800;
            line-height: 1.3;
            color: var(--primary-dark);
            margin-bottom: 20px;
        }
        .article-hero .article-desc {
            font-size: 18px;
            color: var(--text-light);
            line-height: 1.7;
            max-width: 720px;
        }
        .article-hero .article-category {
            display: inline-block;
            background: var(--accent);
            color: var(--primary-dark);
            padding: 4px 16px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 16px;
        }

        /* ===== Article Content ===== */
        .article-content-wrap {
            padding: 64px 0 80px;
            background: var(--bg);
        }
        .article-content-wrap .container-narrow {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 48px 56px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
        }
        .article-body {
            font-size: 17px;
            line-height: 1.9;
            color: var(--text);
        }
        .article-body h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--primary-dark);
            margin: 40px 0 16px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--bg-alt);
        }
        .article-body h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--primary);
            margin: 32px 0 12px;
        }
        .article-body p {
            margin-bottom: 18px;
        }
        .article-body ul, .article-body ol {
            margin: 16px 0 20px;
            padding-left: 24px;
        }
        .article-body ul li {
            list-style: disc;
            margin-bottom: 8px;
        }
        .article-body ol li {
            list-style: decimal;
            margin-bottom: 8px;
        }
        .article-body blockquote {
            background: var(--bg-alt);
            border-left: 4px solid var(--accent);
            padding: 20px 28px;
            margin: 24px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            font-style: italic;
            color: var(--text-light);
        }
        .article-body img {
            border-radius: var(--radius);
            margin: 24px 0;
            width: 100%;
        }
        .article-body a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-body a:hover { color: var(--accent-dark); }
        .article-body .btn { text-decoration: none; }
        .article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0;
            font-size: 15px;
        }
        .article-body table th {
            background: var(--primary);
            color: #fff;
            padding: 12px 18px;
            text-align: left;
            font-weight: 600;
        }
        .article-body table td {
            padding: 12px 18px;
            border-bottom: 1px solid var(--border);
        }
        .article-body table tr:nth-child(even) td { background: var(--bg-alt); }
        .article-body code {
            background: var(--bg-alt);
            padding: 2px 10px;
            border-radius: 4px;
            font-size: 14px;
            color: var(--primary);
        }
        .article-body pre {
            background: var(--bg-dark);
            color: #e8edf5;
            padding: 24px;
            border-radius: var(--radius);
            overflow-x: auto;
            margin: 24px 0;
            font-size: 14px;
            line-height: 1.6;
        }
        .article-body pre code { background: none; color: inherit; padding: 0; }

        .article-not-found {
            text-align: center;
            padding: 80px 20px;
        }
        .article-not-found i {
            font-size: 56px;
            color: var(--border);
            margin-bottom: 24px;
        }
        .article-not-found h2 {
            font-size: 28px;
            color: var(--text-light);
            margin-bottom: 12px;
        }
        .article-not-found p {
            color: var(--text-light);
            margin-bottom: 24px;
        }

        /* ===== Article Footer Nav ===== */
        .article-footer-nav {
            padding: 40px 0 60px;
            background: var(--bg-alt);
        }
        .article-footer-nav .container-narrow {
            display: flex;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
        }
        .article-footer-nav .prev-next {
            display: flex;
            gap: 16px;
            align-items: center;
        }
        .article-footer-nav .prev-next a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            color: var(--text-light);
            font-size: 14px;
            transition: var(--transition);
        }
        .article-footer-nav .prev-next a:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(26,58,107,0.04);
        }

        /* ===== Related Section ===== */
        .related-section {
            padding: 60px 0 80px;
            background: var(--bg);
        }
        .related-section .section-title {
            text-align: center;
            font-size: 30px;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 48px;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .related-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: var(--transition);
            box-shadow: var(--shadow);
        }
        .related-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
        .related-card .card-img {
            height: 200px;
            background-size: cover;
            background-position: center;
            position: relative;
        }
        .related-card .card-img .card-tag {
            position: absolute;
            top: 16px;
            left: 16px;
            background: var(--accent);
            color: var(--primary-dark);
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
        }
        .related-card .card-body {
            padding: 24px;
        }
        .related-card .card-body h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--primary-dark);
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .related-card .card-body p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.6;
            margin-bottom: 16px;
        }
        .related-card .card-body .card-meta {
            font-size: 13px;
            color: var(--text-light);
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .related-card .card-body .card-meta i { color: var(--accent); margin-right: 4px; }

        /* ===== CTA Section ===== */
        .article-cta {
            padding: 60px 0;
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            color: #fff;
            text-align: center;
        }
        .article-cta h2 {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .article-cta p {
            font-size: 18px;
            color: rgba(255,255,255,0.8);
            max-width: 600px;
            margin: 0 auto 32px;
        }
        .article-cta .btn-accent { font-size: 18px; padding: 16px 48px; }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.7);
            padding: 64px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 48px;
        }
        .footer-brand .footer-logo {
            display: inline-block;
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255,255,255,0.6);
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 18px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: rgba(255,255,255,0.6);
            font-size: 14px;
            transition: var(--transition);
        }
        .footer-col ul li a:hover { color: var(--accent); padding-left: 4px; }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding: 24px 0;
            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 a { color: rgba(255,255,255,0.7); }
        .footer-bottom a:hover { color: var(--accent); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .related-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .nav-main {
                position: fixed;
                top: 68px;
                left: 0;
                width: 100%;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(12px);
                flex-direction: column;
                padding: 20px 24px;
                gap: 6px;
                border-bottom: 1px solid var(--border);
                transform: translateY(-120%);
                opacity: 0;
                transition: var(--transition);
                box-shadow: var(--shadow-lg);
                pointer-events: none;
            }
            .nav-main.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-main a { width: 100%; padding: 12px 16px; }
            .nav-main a.active::after { display: none; }
            .nav-cta { width: 100%; margin-left: 0; margin-top: 8px; }
            .nav-cta .btn { width: 100%; }
            .nav-toggle { display: flex; }
            .article-hero h1 { font-size: 28px; }
            .article-content-wrap .container-narrow { padding: 28px 20px; }
            .article-body { font-size: 16px; }
            .article-body h2 { font-size: 22px; }
            .article-body h3 { font-size: 18px; }
            .related-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 32px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .article-footer-nav .container-narrow { flex-direction: column; align-items: center; }
            .article-cta h2 { font-size: 26px; }
            .article-hero { padding: 100px 0 40px; }
            .article-hero .meta-info { gap: 12px; font-size: 13px; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .article-hero h1 { font-size: 24px; }
            .article-content-wrap .container-narrow { padding: 20px 16px; }
            .article-body { font-size: 15px; }
            .article-body table { font-size: 13px; }
            .article-body table th, .article-body table td { padding: 8px 10px; }
            .related-card .card-img { height: 160px; }
            .article-cta h2 { font-size: 22px; }
            .article-cta .btn-accent { font-size: 16px; padding: 14px 32px; }
            .header-logo { font-size: 18px; }
            .logo-icon { width: 32px; height: 32px; font-size: 16px; }
        }
        @media (min-width: 769px) {
            .nav-main { display: flex !important; transform: none !important; opacity: 1 !important; pointer-events: auto !important; }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a3a5c;
            --primary-light: #2a5a8c;
            --primary-dark: #0f2440;
            --secondary: #e8a838;
            --secondary-light: #f0c060;
            --secondary-dark: #c88a20;
            --accent: #2ecc71;
            --accent-light: #58d68d;
            --bg-light: #f8f9fc;
            --bg-white: #ffffff;
            --bg-dark: #0f1a2e;
            --text-primary: #1a2a3a;
            --text-secondary: #4a5a6a;
            --text-light: #8a9aaa;
            --text-white: #ffffff;
            --border-color: #e2e6ef;
            --border-light: #f0f2f7;
            --shadow-sm: 0 2px 8px rgba(26, 58, 92, 0.06);
            --shadow-md: 0 6px 24px rgba(26, 58, 92, 0.10);
            --shadow-lg: 0 12px 40px rgba(26, 58, 92, 0.14);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --transition: all 0.3s ease;
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', Roboto, system-ui, -apple-system, sans-serif;
            --container-max: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-light);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--secondary); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.3; color: var(--text-primary); }
        h1 { font-size: 2.4rem; }
        h2 { font-size: 1.8rem; margin-bottom: 1rem; }
        h3 { font-size: 1.3rem; margin-bottom: 0.6rem; }
        p { margin-bottom: 1rem; color: var(--text-secondary); }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        section { padding: 80px 0; }
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 {
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .section-title p {
            max-width: 640px;
            margin: 0 auto;
            font-size: 1.05rem;
            color: var(--text-secondary);
        }
        .text-center { text-align: center; }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 32px;
            font-size: 1rem;
            font-weight: 600;
            border-radius: var(--radius-md);
            border: 2px solid transparent;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
            line-height: 1.4;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--secondary);
            color: var(--primary-dark);
            border-color: var(--secondary);
        }
        .btn-primary:hover {
            background: var(--secondary-light);
            border-color: var(--secondary-light);
            color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .btn-outline {
            background: transparent;
            color: var(--text-white);
            border-color: var(--text-white);
        }
        .btn-outline:hover {
            background: var(--text-white);
            color: var(--primary);
            transform: translateY(-2px);
        }
        .btn-lg { padding: 16px 40px; font-size: 1.1rem; border-radius: var(--radius-lg); }
        .btn-sm { padding: 8px 20px; font-size: 0.9rem; border-radius: var(--radius-sm); }

        /* ===== Header & Nav ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-height);
            background: rgba(255,255,255,0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            z-index: 1000;
            transition: var(--transition);
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--primary);
            text-decoration: none;
        }
        .header-logo:hover { color: var(--primary); }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--secondary);
            color: var(--primary-dark);
            font-weight: 800;
            border-radius: var(--radius-sm);
            font-size: 1.1rem;
        }
        .nav-main {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-main a {
            display: inline-block;
            padding: 8px 18px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .nav-main a:hover { color: var(--primary); background: rgba(26,58,92,0.06); }
        .nav-main a.active {
            color: var(--primary);
            background: rgba(26,58,92,0.08);
            font-weight: 600;
        }
        .nav-cta { margin-left: 12px; }
        .nav-cta .btn { padding: 8px 22px; font-size: 0.9rem; }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
        }
        .nav-toggle span {
            display: block;
            width: 26px;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
            transition: var(--transition);
        }

        /* ===== Hero ===== */
        .hero {
            margin-top: var(--header-height);
            padding: 120px 0 100px;
            background: var(--primary-dark);
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            position: relative;
            color: var(--text-white);
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,36,64,0.85) 0%, rgba(26,58,92,0.70) 100%);
            z-index: 1;
        }
        .hero .container { position: relative; z-index: 2; }
        .hero-content { max-width: 720px; }
        .hero h1 {
            font-size: 3rem;
            color: var(--text-white);
            margin-bottom: 20px;
            letter-spacing: -0.02em;
        }
        .hero h1 span { color: var(--secondary); }
        .hero p {
            font-size: 1.15rem;
            color: rgba(255,255,255,0.85);
            margin-bottom: 36px;
            max-width: 600px;
            line-height: 1.8;
        }
        .hero-buttons { display: flex; gap: 16px; flex-wrap: wrap; }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255,255,255,0.12);
            padding: 8px 20px;
            border-radius: 40px;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.9);
            margin-bottom: 24px;
            backdrop-filter: blur(4px);
            border: 1px solid rgba(255,255,255,0.15);
        }
        .hero-badge i { color: var(--secondary); }

        /* ===== Features / 卖点 ===== */
        .features { background: var(--bg-white); }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .feature-card {
            background: var(--bg-light);
            padding: 36px 28px;
            border-radius: var(--radius-md);
            text-align: center;
            transition: var(--transition);
            border: 1px solid var(--border-light);
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: var(--border-color);
        }
        .feature-card .icon {
            width: 60px;
            height: 60px;
            margin: 0 auto 20px;
            background: var(--primary);
            color: var(--text-white);
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
        }
        .feature-card h3 { font-size: 1.2rem; color: var(--primary); }
        .feature-card p { font-size: 0.95rem; color: var(--text-secondary); margin-bottom: 0; }

        /* ===== Process / 流程 ===== */
        .process { background: var(--bg-light); }
        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            counter-reset: step;
        }
        .process-step {
            background: var(--bg-white);
            padding: 32px 24px;
            border-radius: var(--radius-md);
            text-align: center;
            border: 1px solid var(--border-light);
            transition: var(--transition);
            position: relative;
        }
        .process-step:hover {
            box-shadow: var(--shadow-sm);
            transform: translateY(-4px);
        }
        .process-step .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            background: var(--secondary);
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 1.2rem;
            border-radius: 50%;
            margin-bottom: 16px;
        }
        .process-step h4 { font-size: 1.05rem; color: var(--primary); margin-bottom: 8px; }
        .process-step p { font-size: 0.9rem; color: var(--text-secondary); margin-bottom: 0; }

        /* ===== Scenarios / 适用场景 ===== */
        .scenarios { background: var(--bg-white); }
        .scenarios-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .scenario-card {
            border-radius: var(--radius-md);
            overflow: hidden;
            background: var(--bg-light);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .scenario-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
        }
        .scenario-card img {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }
        .scenario-card-body { padding: 24px; }
        .scenario-card-body h3 { font-size: 1.1rem; color: var(--primary); }
        .scenario-card-body p { font-size: 0.92rem; color: var(--text-secondary); margin-bottom: 0; }
        .scenario-tag {
            display: inline-block;
            padding: 4px 14px;
            background: rgba(232,168,56,0.15);
            color: var(--secondary-dark);
            font-size: 0.8rem;
            font-weight: 600;
            border-radius: 20px;
            margin-bottom: 10px;
        }

        /* ===== FAQ ===== */
        .faq { background: var(--bg-light); }
        .faq-list { max-width: 800px; margin: 0 auto; }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            margin-bottom: 14px;
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--border-color); }
        .faq-question {
            padding: 20px 28px;
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--text-primary);
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 12px;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            font-family: var(--font-sans);
            transition: var(--transition);
        }
        .faq-question i {
            color: var(--secondary);
            font-size: 1.1rem;
            transition: var(--transition);
        }
        .faq-question.open i { transform: rotate(45deg); }
        .faq-answer {
            padding: 0 28px 20px;
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.8;
            display: none;
        }
        .faq-answer.show { display: block; }

        /* ===== CTA ===== */
        .cta {
            background: var(--primary-dark);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            padding: 80px 0;
            text-align: center;
            color: var(--text-white);
            position: relative;
        }
        .cta::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(15,36,64,0.8);
            z-index: 1;
        }
        .cta .container { position: relative; z-index: 2; }
        .cta h2 {
            color: var(--text-white);
            font-size: 2.2rem;
            margin-bottom: 16px;
        }
        .cta p {
            color: rgba(255,255,255,0.85);
            max-width: 600px;
            margin: 0 auto 32px;
            font-size: 1.1rem;
        }
        .cta .btn { font-size: 1.05rem; padding: 16px 44px; }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.7);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-logo {
            display: inline-block;
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .footer-logo:hover { color: var(--secondary); }
        .footer-brand p { font-size: 0.9rem; color: rgba(255,255,255,0.6); margin-bottom: 0; line-height: 1.8; }
        .footer-col h4 {
            color: var(--text-white);
            font-size: 1rem;
            margin-bottom: 18px;
            font-weight: 600;
        }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a {
            color: rgba(255,255,255,0.6);
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .footer-col ul li a:hover { color: var(--secondary); padding-left: 4px; }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding: 24px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.5);
        }
        .footer-bottom a { color: rgba(255,255,255,0.6); }
        .footer-bottom a:hover { color: var(--secondary); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .features-grid { grid-template-columns: repeat(2, 1fr); }
            .scenarios-grid { grid-template-columns: repeat(2, 1fr); }
            .process-steps { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }

        @media (max-width: 768px) {
            .header { height: 64px; }
            .nav-main {
                display: none;
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                background: var(--bg-white);
                flex-direction: column;
                padding: 24px 20px;
                gap: 12px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: var(--shadow-md);
                z-index: 999;
            }
            .nav-main.open { display: flex; }
            .nav-main a { width: 100%; padding: 12px 16px; font-size: 1rem; }
            .nav-cta { margin-left: 0; width: 100%; }
            .nav-cta .btn { width: 100%; justify-content: center; }
            .nav-toggle { display: flex; }
            .hero { padding: 80px 0 60px; }
            .hero h1 { font-size: 2rem; }
            .hero p { font-size: 1rem; }
            section { padding: 60px 0; }
            .features-grid { grid-template-columns: 1fr; }
            .scenarios-grid { grid-template-columns: 1fr; }
            .process-steps { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 32px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .section-title h2 { font-size: 1.6rem; }
            .cta h2 { font-size: 1.6rem; }
        }

        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .hero h1 { font-size: 1.6rem; }
            .hero-buttons { flex-direction: column; }
            .hero-buttons .btn { width: 100%; justify-content: center; }
            .feature-card { padding: 24px 18px; }
            .process-step { padding: 24px 18px; }
            .faq-question { padding: 16px 20px; font-size: 0.95rem; }
            .faq-answer { padding: 0 20px 16px; }
        }

        /* ===== Utility ===== */
        .mt-0 { margin-top: 0; }
        .mb-0 { margin-bottom: 0; }
        .gap-sm { gap: 12px; }
        .gap-md { gap: 24px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }