/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --color-primary: #1A3A5C;
            --color-primary-light: #2a4a6c;
            --color-primary-dark: #0f2a3f;
            --color-accent: #D4A843;
            --color-accent-light: #e8c46a;
            --color-accent-dark: #b89230;
            --color-bg: #F5F7FA;
            --color-bg-alt: #EDF0F5;
            --color-white: #FFFFFF;
            --color-text: #2C3E50;
            --color-text-light: #6B7A8A;
            --color-text-lighter: #9AA6B2;
            --color-heading: #111827;
            --color-border: #E2E6EC;
            --color-footer-bg: #1E293B;
            --color-footer-text: #CBD5E1;
            --color-footer-link: #F1F5F9;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.07);
            --shadow-lg: 0 8px 32px rgba(0,0,0,0.10);
            --shadow-hover: 0 12px 40px rgba(0,0,0,0.14);
            --transition-fast: 0.2s ease;
            --transition-med: 0.35s ease;
            --transition-slow: 0.5s ease;
            --font-sans: 'Noto Sans SC', 'Open Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --container-max: 1200px;
            --spacing-section: 80px;
            --spacing-section-mobile: 48px;
        }

        /* ===== Reset / Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a { color: var(--color-primary); text-decoration: none; transition: color var(--transition-fast); }
        a:hover { color: var(--color-accent); }
        a:focus { outline: 2px solid var(--color-accent); outline-offset: 2px; }
        img { max-width: 100%; height: auto; display: block; }
        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            line-height: 1.25;
            color: var(--color-heading);
            margin-bottom: 0.5em;
        }
        h1 { font-size: 48px; }
        h2 { font-size: 36px; }
        h3 { font-size: 28px; }
        h4 { font-size: 22px; }
        p { margin-bottom: 1em; }
        ul, ol { list-style: none; }
        button, .button {
            cursor: pointer;
            font-family: var(--font-sans);
            border: none;
            outline: none;
            transition: all var(--transition-med);
        }
        input, textarea, select {
            font-family: var(--font-sans);
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }
        input:focus, textarea:focus, select:focus {
            border-color: var(--color-primary) !important;
            box-shadow: 0 0 0 3px rgba(26,58,92,0.15) !important;
            outline: none;
        }

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

        /* ===== Section Spacing ===== */
        .section { padding: var(--spacing-section) 0; }
        .section-alt { background: var(--color-bg-alt); }
        .section-white { background: var(--color-white); }
        @media (max-width: 768px) {
            .section { padding: var(--spacing-section-mobile) 0; }
        }

        /* ===== Navigation (Floating Dock) ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            padding: 12px 24px;
            display: flex;
            justify-content: center;
            pointer-events: none;
        }
        .nav-dock {
            pointer-events: auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: var(--container-max);
            height: 60px;
            padding: 0 28px;
            background: rgba(255,255,255,0.88);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-radius: var(--radius-lg);
            box-shadow: 0 4px 24px rgba(0,0,0,0.06);
            border: 1px solid rgba(255,255,255,0.5);
        }
        .nav-logo {
            font-size: 22px;
            font-weight: 800;
            color: var(--color-primary);
            letter-spacing: 1px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-logo .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--color-primary);
            color: var(--color-white);
            border-radius: 10px;
            font-size: 18px;
            font-weight: 800;
        }
        .nav-logo:hover { color: var(--color-primary); }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-links a {
            padding: 8px 20px;
            border-radius: 8px;
            font-size: 15px;
            font-weight: 500;
            color: var(--color-text);
            transition: all var(--transition-fast);
            position: relative;
        }
        .nav-links a:hover {
            background: rgba(26,58,92,0.06);
            color: var(--color-primary);
        }
        .nav-links a.active {
            background: var(--color-primary);
            color: var(--color-white);
        }
        .nav-links a.active:hover {
            background: var(--color-primary-light);
            color: var(--color-white);
        }
        .nav-cta {
            background: var(--color-accent);
            color: var(--color-white) !important;
            padding: 8px 24px !important;
            border-radius: 8px;
            font-weight: 600;
        }
        .nav-cta:hover {
            background: var(--color-accent-dark);
            transform: translateY(-1px);
        }
        .hamburger {
            display: none;
            font-size: 24px;
            color: var(--color-primary);
            background: none;
            border: none;
            padding: 4px 8px;
            cursor: pointer;
        }
        .hamburger:focus { outline: 2px solid var(--color-accent); outline-offset: 2px; }
        .mobile-menu {
            display: none;
            position: fixed;
            top: 84px;
            left: 24px;
            right: 24px;
            background: rgba(255,255,255,0.97);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            padding: 20px;
            z-index: 999;
            border: 1px solid rgba(255,255,255,0.6);
        }
        .mobile-menu.open { display: block; }
        .mobile-menu a {
            display: block;
            padding: 14px 16px;
            border-radius: 8px;
            font-size: 16px;
            font-weight: 500;
            color: var(--color-text);
            border-bottom: 1px solid var(--color-border);
        }
        .mobile-menu a:last-child { border-bottom: none; }
        .mobile-menu a:hover { background: rgba(26,58,92,0.06); }
        .mobile-menu a.active { color: var(--color-primary); font-weight: 700; }
        .mobile-menu .nav-cta-mobile {
            background: var(--color-accent);
            color: var(--color-white) !important;
            text-align: center;
            margin-top: 8px;
            border-radius: 8px;
        }
        .mobile-menu .nav-cta-mobile:hover { background: var(--color-accent-dark); }
        @media (max-width: 768px) {
            .nav-links, .nav-cta { display: none; }
            .hamburger { display: block; }
            .nav-dock { padding: 0 16px; height: 56px; }
            .site-header { padding: 8px 16px; }
        }
        @media (min-width: 769px) {
            .mobile-menu { display: none !important; }
        }

        /* ===== Hero Section ===== */
        .hero {
            position: relative;
            min-height: 90vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            margin-top: 0;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,42,63,0.82) 0%, rgba(26,58,92,0.70) 50%, rgba(15,42,63,0.60) 100%);
            z-index: 1;
        }
        .hero .hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(212,168,67,0.12) 0%, transparent 70%);
            z-index: 2;
        }
        .hero-content {
            position: relative;
            z-index: 3;
            text-align: center;
            max-width: 820px;
            padding: 40px 24px;
        }
        .hero-badge {
            display: inline-block;
            background: rgba(212,168,67,0.20);
            color: var(--color-accent-light);
            padding: 6px 20px;
            border-radius: 30px;
            font-size: 14px;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 24px;
            backdrop-filter: blur(4px);
            border: 1px solid rgba(212,168,67,0.25);
        }
        .hero h1 {
            font-size: 52px;
            font-weight: 800;
            color: var(--color-white);
            line-height: 1.15;
            margin-bottom: 20px;
            text-shadow: 0 2px 20px rgba(0,0,0,0.25);
        }
        .hero h1 .highlight {
            color: var(--color-accent);
        }
        .hero-sub {
            font-size: 20px;
            color: rgba(255,255,255,0.85);
            line-height: 1.6;
            margin-bottom: 32px;
            font-weight: 400;
            max-width: 640px;
            margin-left: auto;
            margin-right: auto;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .hero-actions .btn-primary {
            background: var(--color-accent);
            color: var(--color-white);
            padding: 16px 40px;
            border-radius: 8px;
            font-size: 17px;
            font-weight: 700;
            box-shadow: 0 4px 16px rgba(212,168,67,0.35);
        }
        .hero-actions .btn-primary:hover {
            background: var(--color-accent-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(212,168,67,0.45);
        }
        .hero-actions .btn-primary:active { transform: translateY(0); }
        .hero-actions .btn-secondary {
            background: rgba(255,255,255,0.12);
            color: var(--color-white);
            padding: 16px 36px;
            border-radius: 8px;
            font-size: 17px;
            font-weight: 600;
            backdrop-filter: blur(4px);
            border: 1px solid rgba(255,255,255,0.25);
        }
        .hero-actions .btn-secondary:hover {
            background: rgba(255,255,255,0.22);
            transform: translateY(-2px);
        }
        .hero-actions .btn-secondary:active { transform: translateY(0); }
        .hero-stats {
            display: flex;
            justify-content: center;
            gap: 48px;
            margin-top: 48px;
            flex-wrap: wrap;
        }
        .hero-stat {
            text-align: center;
            color: rgba(255,255,255,0.90);
        }
        .hero-stat .num {
            font-size: 36px;
            font-weight: 800;
            color: var(--color-white);
            display: block;
            line-height: 1.2;
        }
        .hero-stat .label {
            font-size: 14px;
            opacity: 0.75;
            margin-top: 4px;
        }
        @media (max-width: 768px) {
            .hero { min-height: 75vh; }
            .hero h1 { font-size: 32px; }
            .hero-sub { font-size: 17px; }
            .hero-actions .btn-primary,
            .hero-actions .btn-secondary { padding: 14px 28px; font-size: 15px; width: 100%; }
            .hero-stats { gap: 24px; margin-top: 32px; }
            .hero-stat .num { font-size: 28px; }
        }
        @media (max-width: 480px) {
            .hero h1 { font-size: 26px; }
            .hero-sub { font-size: 15px; }
        }

        /* ===== Section Titles ===== */
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 {
            font-size: 36px;
            font-weight: 800;
            color: var(--color-heading);
            margin-bottom: 12px;
        }
        .section-title p {
            font-size: 18px;
            color: var(--color-text-light);
            max-width: 600px;
            margin: 0 auto;
        }
        .section-title .title-tag {
            display: inline-block;
            background: rgba(212,168,67,0.15);
            color: var(--color-accent-dark);
            padding: 4px 16px;
            border-radius: 30px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.3px;
            margin-bottom: 12px;
        }
        @media (max-width: 768px) {
            .section-title h2 { font-size: 28px; }
            .section-title p { font-size: 16px; }
        }

        /* ===== Cards ===== */
        .card {
            background: var(--color-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-md);
            padding: 28px 24px;
            transition: all var(--transition-med);
            height: 100%;
            border: 1px solid rgba(0,0,0,0.02);
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .card .card-icon {
            width: 52px;
            height: 52px;
            background: rgba(26,58,92,0.08);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: var(--color-primary);
            margin-bottom: 16px;
            transition: all var(--transition-fast);
        }
        .card:hover .card-icon {
            background: var(--color-primary);
            color: var(--color-white);
        }
        .card h3, .card h4 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--color-heading);
        }
        .card p {
            font-size: 15px;
            color: var(--color-text-light);
            line-height: 1.7;
            margin-bottom: 0;
        }
        .card .card-tag {
            display: inline-block;
            background: rgba(212,168,67,0.15);
            color: var(--color-accent-dark);
            padding: 2px 12px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            margin-bottom: 12px;
        }
        @media (max-width: 768px) {
            .card { padding: 20px 16px; }
            .card h3, .card h4 { font-size: 18px; }
        }

        /* ===== Pain Points Section ===== */
        .pain-points .grid-x { align-items: stretch; }
        .pain-card {
            background: var(--color-white);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            box-shadow: var(--shadow-sm);
            border-left: 4px solid var(--color-accent);
            transition: all var(--transition-med);
            height: 100%;
        }
        .pain-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .pain-card .icon-wrap {
            width: 44px;
            height: 44px;
            background: rgba(212,168,67,0.12);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--color-accent-dark);
            margin-bottom: 14px;
        }
        .pain-card h4 {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-heading);
            margin-bottom: 6px;
        }
        .pain-card p {
            font-size: 14px;
            color: var(--color-text-light);
            margin-bottom: 0;
        }
        @media (max-width: 768px) {
            .pain-card { padding: 24px 20px; }
        }

        /* ===== Solutions Section (2+1 layout) ===== */
        .solutions-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
        }
        .solutions-grid .feature-card:last-child {
            grid-column: 1 / -1;
            max-width: 600px;
            margin: 0 auto;
            width: 100%;
        }
        .feature-card {
            background: var(--color-white);
            border-radius: var(--radius-md);
            padding: 36px 32px;
            box-shadow: var(--shadow-md);
            transition: all var(--transition-med);
            border: 1px solid rgba(0,0,0,0.02);
            display: flex;
            flex-direction: column;
            position: relative;
            overflow: hidden;
        }
        .feature-card::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: var(--color-accent);
            opacity: 0;
            transition: opacity var(--transition-med);
        }
        .feature-card:hover::after { opacity: 1; }
        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .feature-card .fc-icon {
            width: 56px;
            height: 56px;
            background: rgba(26,58,92,0.08);
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
            color: var(--color-primary);
            margin-bottom: 18px;
            transition: all var(--transition-fast);
        }
        .feature-card:hover .fc-icon {
            background: var(--color-primary);
            color: var(--color-white);
        }
        .feature-card h4 {
            font-size: 20px;
            font-weight: 700;
            color: var(--color-heading);
            margin-bottom: 8px;
        }
        .feature-card p {
            font-size: 15px;
            color: var(--color-text-light);
            line-height: 1.7;
            margin-bottom: 16px;
            flex: 1;
        }
        .feature-card .feature-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .feature-card .feature-link i { font-size: 12px; transition: transform var(--transition-fast); }
        .feature-card .feature-link:hover i { transform: translateX(4px); }
        @media (max-width: 768px) {
            .solutions-grid { grid-template-columns: 1fr; }
            .solutions-grid .feature-card:last-child { max-width: 100%; }
            .feature-card { padding: 24px 20px; }
        }

        /* ===== Achievements / Stats ===== */
        .achievements {
            background: var(--color-primary);
            color: var(--color-white);
            text-align: center;
        }
        .achievements .section-title h2 { color: var(--color-white); }
        .achievements .section-title p { color: rgba(255,255,255,0.70); }
        .achievements .section-title .title-tag {
            background: rgba(212,168,67,0.25);
            color: var(--color-accent-light);
        }
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            margin-top: 32px;
        }
        .stat-item {
            padding: 24px 16px;
            background: rgba(255,255,255,0.06);
            border-radius: var(--radius-md);
            backdrop-filter: blur(4px);
            border: 1px solid rgba(255,255,255,0.08);
        }
        .stat-item .stat-num {
            font-size: 42px;
            font-weight: 800;
            color: var(--color-accent);
            line-height: 1.2;
        }
        .stat-item .stat-label {
            font-size: 15px;
            color: rgba(255,255,255,0.75);
            margin-top: 6px;
        }
        @media (max-width: 768px) {
            .stat-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
            .stat-item .stat-num { font-size: 32px; }
        }
        @media (max-width: 480px) {
            .stat-grid { grid-template-columns: 1fr 1fr; }
        }

        /* ===== Testimonials ===== */
        .testimonial-card {
            background: var(--color-white);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            box-shadow: var(--shadow-md);
            transition: all var(--transition-med);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .testimonial-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
        }
        .testimonial-card .quote-icon {
            font-size: 32px;
            color: rgba(212,168,67,0.25);
            margin-bottom: 8px;
        }
        .testimonial-card blockquote {
            font-size: 16px;
            color: var(--color-text);
            line-height: 1.8;
            font-style: normal;
            margin-bottom: 20px;
            flex: 1;
            border: none;
            padding: 0;
        }
        .testimonial-card .testi-author {
            display: flex;
            align-items: center;
            gap: 14px;
            border-top: 1px solid var(--color-border);
            padding-top: 16px;
        }
        .testimonial-card .testi-avatar {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--color-primary);
            color: var(--color-white);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 700;
            flex-shrink: 0;
        }
        .testimonial-card .testi-name {
            font-size: 16px;
            font-weight: 700;
            color: var(--color-heading);
        }
        .testimonial-card .testi-role {
            font-size: 13px;
            color: var(--color-text-lighter);
        }
        @media (max-width: 768px) {
            .testimonial-card { padding: 24px 20px; }
        }

        /* ===== CTA Section ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
            text-align: center;
            padding: 72px 0;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 70% 30%, rgba(212,168,67,0.12) 0%, transparent 60%);
            pointer-events: none;
        }
        .cta-section .container-custom { position: relative; z-index: 1; }
        .cta-section h2 {
            font-size: 38px;
            font-weight: 800;
            color: var(--color-white);
            margin-bottom: 12px;
        }
        .cta-section p {
            font-size: 18px;
            color: rgba(255,255,255,0.75);
            max-width: 560px;
            margin: 0 auto 32px;
        }
        .cta-section .btn-cta {
            background: var(--color-accent);
            color: var(--color-white);
            padding: 18px 52px;
            border-radius: 8px;
            font-size: 18px;
            font-weight: 700;
            display: inline-block;
            box-shadow: 0 6px 24px rgba(212,168,67,0.35);
            transition: all var(--transition-med);
        }
        .cta-section .btn-cta:hover {
            background: var(--color-accent-dark);
            transform: translateY(-2px);
            box-shadow: 0 10px 36px rgba(212,168,67,0.50);
        }
        .cta-section .btn-cta:active { transform: translateY(0); }
        .cta-section .cta-note {
            font-size: 14px;
            color: rgba(255,255,255,0.50);
            margin-top: 16px;
        }
        @media (max-width: 768px) {
            .cta-section { padding: 52px 0; }
            .cta-section h2 { font-size: 28px; }
            .cta-section p { font-size: 16px; }
            .cta-section .btn-cta { padding: 16px 36px; font-size: 16px; width: 100%; }
        }

        /* ===== Latest News / CMS List ===== */
        .news-card {
            background: var(--color-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 24px 24px;
            transition: all var(--transition-med);
            height: 100%;
            display: flex;
            flex-direction: column;
            border: 1px solid rgba(0,0,0,0.02);
        }
        .news-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }
        .news-card .news-tag {
            display: inline-block;
            background: rgba(212,168,67,0.15);
            color: var(--color-accent-dark);
            padding: 2px 14px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            margin-bottom: 10px;
            align-self: flex-start;
        }
        .news-card .news-date {
            font-size: 13px;
            color: var(--color-text-lighter);
            margin-bottom: 6px;
        }
        .news-card h4 {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-heading);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .news-card h4 a { color: inherit; }
        .news-card h4 a:hover { color: var(--color-accent); }
        .news-card .news-summary {
            font-size: 14px;
            color: var(--color-text-light);
            line-height: 1.6;
            margin-bottom: 12px;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card .news-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .news-card .news-link i { font-size: 12px; transition: transform var(--transition-fast); }
        .news-card .news-link:hover i { transform: translateX(4px); }
        .empty-state {
            grid-column: 1 / -1;
            text-align: center;
            padding: 48px 24px;
            color: var(--color-text-lighter);
        }
        .empty-state i { font-size: 48px; margin-bottom: 12px; opacity: 0.4; display: block; }
        .empty-state p { font-size: 15px; }
        @media (max-width: 768px) {
            .news-card { padding: 18px 16px; }
            .news-card h4 { font-size: 16px; }
        }

        /* ===== Buttons (global) ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 8px;
            font-size: 16px;
            font-weight: 600;
            font-family: var(--font-sans);
            border: none;
            cursor: pointer;
            transition: all var(--transition-med);
            text-decoration: none;
        }
        .btn:focus { outline: 2px solid var(--color-accent); outline-offset: 2px; }
        .btn-primary {
            background: var(--color-primary);
            color: var(--color-white);
        }
        .btn-primary:hover {
            background: var(--color-primary-light);
            color: var(--color-white);
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(26,58,92,0.25);
        }
        .btn-primary:active { transform: translateY(0); }
        .btn-accent {
            background: var(--color-accent);
            color: var(--color-white);
        }
        .btn-accent:hover {
            background: var(--color-accent-dark);
            color: var(--color-white);
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(212,168,67,0.30);
        }
        .btn-accent:active { transform: translateY(0); }
        .btn-outline {
            background: transparent;
            color: var(--color-primary);
            border: 2px solid var(--color-primary);
        }
        .btn-outline:hover {
            background: var(--color-primary);
            color: var(--color-white);
            transform: translateY(-1px);
        }
        .btn-outline:active { transform: translateY(0); }

        /* ===== Tags / Badges ===== */
        .tag {
            display: inline-block;
            background: rgba(212,168,67,0.15);
            color: var(--color-accent-dark);
            padding: 4px 14px;
            border-radius: var(--radius-sm);
            font-size: 13px;
            font-weight: 600;
            line-height: 1.4;
        }
        .tag-primary {
            background: rgba(26,58,92,0.10);
            color: var(--color-primary);
        }
        .tag-light {
            background: rgba(255,255,255,0.15);
            color: var(--color-white);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--color-footer-bg);
            color: var(--color-footer-text);
            padding: 48px 0 24px;
        }
        .site-footer .footer-top {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 32px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .site-footer .footer-brand h3 {
            font-size: 22px;
            font-weight: 800;
            color: var(--color-white);
            margin-bottom: 8px;
        }
        .site-footer .footer-brand p {
            font-size: 14px;
            color: var(--color-footer-text);
            max-width: 320px;
        }
        .site-footer .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--color-white);
            margin-bottom: 14px;
        }
        .site-footer .footer-col a {
            display: block;
            font-size: 14px;
            color: var(--color-footer-link);
            padding: 4px 0;
            opacity: 0.75;
            transition: all var(--transition-fast);
        }
        .site-footer .footer-col a:hover {
            opacity: 1;
            color: var(--color-accent);
            padding-left: 4px;
        }
        .site-footer .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 20px;
            font-size: 13px;
            color: rgba(255,255,255,0.45);
            flex-wrap: wrap;
            gap: 12px;
        }
        .site-footer .footer-bottom a {
            color: rgba(255,255,255,0.55);
            margin-left: 16px;
        }
        .site-footer .footer-bottom a:hover { color: var(--color-accent); }
        @media (max-width: 768px) {
            .site-footer .footer-top {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .site-footer .footer-bottom a { margin: 0 8px; }
        }

        /* ===== FAQ (placeholder for design system) ===== */
        .faq-item {
            background: var(--color-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border);
            margin-bottom: 12px;
            overflow: hidden;
        }
        .faq-item .faq-question {
            padding: 18px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--color-heading);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: var(--color-white);
            transition: background var(--transition-fast);
            border: none;
            width: 100%;
            text-align: left;
            font-family: var(--font-sans);
        }
        .faq-item .faq-question:hover { background: var(--color-bg-alt); }
        .faq-item .faq-question::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 12px;
            color: var(--color-text-lighter);
            transition: transform var(--transition-fast);
        }
        .faq-item .faq-question.open::after { transform: rotate(180deg); }
        .faq-item .faq-answer {
            padding: 0 24px 18px;
            font-size: 15px;
            color: var(--color-text-light);
            line-height: 1.7;
            display: none;
        }
        .faq-item .faq-answer.open { display: block; }

        /* ===== Responsive Fine-Tuning ===== */
        @media (max-width: 1024px) {
            .hero h1 { font-size: 40px; }
            .stat-grid { gap: 20px; }
        }
        @media (max-width: 640px) {
            .hero h1 { font-size: 28px; }
            .hero-sub { font-size: 16px; }
            .container-custom { padding: 0 12px; }
            .section { padding: 36px 0; }
            .section-title { margin-bottom: 28px; }
            .section-title h2 { font-size: 24px; }
            .card { padding: 18px 14px; }
            .pain-card { padding: 20px 16px; }
            .feature-card { padding: 20px 16px; }
            .testimonial-card { padding: 20px 16px; }
            .stat-grid { gap: 12px; }
            .stat-item { padding: 16px 12px; }
            .stat-item .stat-num { font-size: 28px; }
            .news-card { padding: 16px 14px; }
        }

        /* ===== Utility ===== */
        .text-center { text-align: center; }
        .mb-0 { margin-bottom: 0; }
        .mt-24 { margin-top: 24px; }
        .mt-32 { margin-top: 32px; }
        .gap-16 { gap: 16px; }
        .gap-24 { gap: 24px; }

        /* ===== Accessibility ===== */
        @media (prefers-reduced-motion: reduce) {
            *, *::before, *::after {
                transition: none !important;
                animation: none !important;
            }
        }
        .skip-link {
            position: absolute;
            top: -100%;
            left: 8px;
            background: var(--color-primary);
            color: var(--color-white);
            padding: 8px 16px;
            border-radius: 0 0 8px 8px;
            z-index: 10000;
            font-weight: 600;
        }
        .skip-link:focus { top: 0; }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #1A3A5C;
            --primary-light: #2A5A8C;
            --primary-dark: #0F2A44;
            --accent: #D4A843;
            --accent-light: #E8C76A;
            --accent-dark: #B8922E;
            --bg-body: #F5F7FA;
            --bg-card: #FFFFFF;
            --bg-dark: #1E293B;
            --bg-dark-light: #334155;
            --text-heading: #111827;
            --text-body: #2C3E50;
            --text-muted: #6B7A8F;
            --text-light: #94A3B8;
            --text-white: #F1F5F9;
            --border-color: #E2E8F0;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.05);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
            --shadow-lg: 0 8px 32px rgba(0,0,0,0.12);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Noto Sans SC', 'Open Sans', 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-body);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--accent); }
        a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
        button { cursor: pointer; font-family: inherit; }
        ul, ol { list-style: none; padding: 0; margin: 0; }

        /* ===== Container ===== */
        .container-custom {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 640px) {
            .container-custom { padding: 0 16px; }
        }

        /* ===== Typography ===== */
        h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.25; color: var(--text-heading); }
        h1 { font-size: 48px; letter-spacing: -0.02em; }
        h2 { font-size: 36px; letter-spacing: -0.01em; }
        h3 { font-size: 28px; }
        h4 { font-size: 22px; }
        @media (max-width: 640px) {
            h1 { font-size: 32px; }
            h2 { font-size: 28px; }
            h3 { font-size: 22px; }
            h4 { font-size: 18px; }
        }
        .section-title { text-align: center; margin-bottom: 48px; }
        .section-title h2 { margin-bottom: 12px; }
        .section-title p { font-size: 18px; color: var(--text-muted); max-width: 680px; margin: 0 auto; }
        @media (max-width: 640px) { .section-title { margin-bottom: 32px; } .section-title p { font-size: 16px; } }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 600;
            font-size: 16px;
            padding: 12px 32px;
            border-radius: var(--radius-sm);
            border: none;
            transition: all var(--transition);
            text-decoration: none;
            line-height: 1.4;
            white-space: nowrap;
        }
        .btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
        .btn-primary {
            background: var(--primary);
            color: #fff;
        }
        .btn-primary:hover { background: var(--accent); color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-md); }
        .btn-primary:active { transform: translateY(0); box-shadow: var(--shadow-sm); }
        .btn-accent {
            background: var(--accent);
            color: #fff;
        }
        .btn-accent:hover { background: var(--accent-dark); color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-md); }
        .btn-accent:active { transform: translateY(0); }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }
        .btn-outline:hover { background: rgba(26, 58, 92, 0.08); color: var(--primary); border-color: var(--primary); transform: translateY(-2px); }
        .btn-outline:active { transform: translateY(0); background: rgba(26, 58, 92, 0.15); }
        .btn-white {
            background: #fff;
            color: var(--primary);
        }
        .btn-white:hover { background: var(--accent); color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-md); }
        .btn-lg { padding: 16px 40px; font-size: 18px; }
        .btn-sm { padding: 8px 20px; font-size: 14px; }
        @media (max-width: 640px) { .btn { padding: 10px 24px; font-size: 15px; } .btn-lg { padding: 14px 32px; font-size: 16px; } }

        /* ===== Badge / Tag ===== */
        .badge {
            display: inline-block;
            background: rgba(212, 168, 67, 0.18);
            color: var(--accent-dark);
            font-size: 13px;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 20px;
            line-height: 1.5;
        }
        .badge-primary {
            background: rgba(26, 58, 92, 0.10);
            color: var(--primary);
        }

        /* ===== Card ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 24px;
            transition: all var(--transition);
            border: 1px solid rgba(0,0,0,0.03);
        }
        .card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
        .card-img { border-radius: var(--radius-sm) var(--radius-sm) 0 0; overflow: hidden; margin: -24px -24px 16px -24px; }
        .card-img img { width: 100%; height: 200px; object-fit: cover; }
        .card h3 { font-size: 20px; margin-bottom: 8px; }
        .card h4 { font-size: 18px; margin-bottom: 6px; }
        .card p { font-size: 15px; color: var(--text-muted); line-height: 1.6; }
        .card .card-meta { font-size: 13px; color: var(--text-light); margin-top: 12px; display: flex; align-items: center; gap: 12px; }
        @media (max-width: 640px) { .card { padding: 16px; } .card-img { margin: -16px -16px 12px -16px; } .card-img img { height: 160px; } }

        /* ===== Navigation ===== */
        .site-header {
            position: fixed;
            top: 16px;
            left: 0;
            right: 0;
            z-index: 1000;
            display: flex;
            justify-content: center;
            pointer-events: none;
        }
        .nav-dock {
            pointer-events: auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 90%;
            max-width: var(--container-max);
            height: 60px;
            padding: 0 24px;
            background: rgba(255,255,255,0.88);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-radius: var(--radius-lg);
            box-shadow: 0 4px 24px rgba(0,0,0,0.08);
            border: 1px solid rgba(255,255,255,0.5);
            transition: box-shadow var(--transition);
        }
        .nav-dock:hover { box-shadow: 0 8px 36px rgba(0,0,0,0.12); }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 6px;
            font-weight: 900;
            font-size: 22px;
            color: var(--primary);
            text-decoration: none;
            letter-spacing: -0.02em;
        }
        .nav-logo:hover { color: var(--accent); }
        .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-sm);
            font-weight: 900;
            font-size: 20px;
        }
        .nav-links { display: flex; align-items: center; gap: 8px; }
        .nav-links a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-body);
            text-decoration: none;
            transition: all var(--transition);
            position: relative;
        }
        .nav-links a:hover { background: rgba(26,58,92,0.06); color: var(--primary); }
        .nav-links a.active {
            background: var(--primary);
            color: #fff;
            font-weight: 600;
        }
        .nav-links a.active:hover { background: var(--primary-light); }
        .nav-cta { flex-shrink: 0; padding: 8px 20px; font-size: 14px; border-radius: var(--radius-sm); }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            color: var(--text-body);
            padding: 4px 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .hamburger:hover { background: rgba(0,0,0,0.05); }
        .hamburger:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
        @media (max-width: 768px) {
            .site-header { top: 12px; }
            .nav-dock { height: 56px; padding: 0 16px; }
            .nav-links { display: none; position: absolute; top: 64px; left: 0; right: 0; background: rgba(255,255,255,0.96); backdrop-filter: blur(16px); border-radius: var(--radius-md); box-shadow: var(--shadow-lg); padding: 12px; flex-direction: column; gap: 4px; border: 1px solid rgba(0,0,0,0.05); }
            .nav-links.open { display: flex; }
            .nav-links a { width: 100%; text-align: center; padding: 12px; font-size: 16px; }
            .hamburger { display: block; }
            .nav-cta { display: none; }
            .nav-cta.mobile-visible { display: inline-flex; margin-top: 4px; width: 100%; justify-content: center; }
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 120px 24px 80px;
            background: var(--primary-dark);
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.30;
            z-index: 0;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,42,68,0.85) 0%, rgba(26,58,92,0.70) 50%, rgba(15,42,68,0.88) 100%);
            z-index: 1;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 860px;
            color: #fff;
        }
        .hero-content .badge { background: rgba(212,168,67,0.25); color: var(--accent-light); margin-bottom: 20px; }
        .hero-content h1 { font-size: 56px; font-weight: 900; color: #fff; margin-bottom: 16px; letter-spacing: -0.02em; }
        .hero-content h1 span { color: var(--accent); }
        .hero-content p { font-size: 20px; color: rgba(255,255,255,0.85); line-height: 1.7; margin-bottom: 32px; max-width: 700px; margin-left: auto; margin-right: auto; }
        .hero-actions { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; }
        @media (max-width: 768px) {
            .hero-section { min-height: 80vh; padding: 100px 16px 60px; }
            .hero-content h1 { font-size: 36px; }
            .hero-content p { font-size: 17px; }
            .hero-actions { flex-direction: column; align-items: center; }
            .hero-actions .btn { width: 100%; max-width: 320px; }
        }

        /* ===== Stats / Counter Row ===== */
        .stats-row {
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
            justify-content: center;
            padding: 40px 0;
        }
        .stat-item { text-align: center; min-width: 140px; }
        .stat-item .num { font-size: 44px; font-weight: 900; color: var(--primary); line-height: 1.1; }
        .stat-item .num span { color: var(--accent); }
        .stat-item .label { font-size: 15px; color: var(--text-muted); margin-top: 4px; }
        @media (max-width: 640px) { .stats-row { gap: 24px; } .stat-item .num { font-size: 34px; } }

        /* ===== Sections ===== */
        .section-block { padding: 80px 0; }
        .section-block-alt { background: var(--bg-card); }
        .section-block-dark { background: var(--bg-dark); color: var(--text-white); }
        .section-block-dark h2, .section-block-dark h3, .section-block-dark h4 { color: #fff; }
        .section-block-dark .section-title p { color: var(--text-light); }
        @media (max-width: 640px) { .section-block { padding: 48px 0; } }

        /* ===== Solution Cards Grid ===== */
        .solution-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        .solution-grid .card:first-child { grid-column: 1 / -1; display: grid; grid-template-columns: 1fr 1fr; gap: 20px; align-items: center; }
        .solution-grid .card:first-child .card-img { margin: 0; border-radius: var(--radius-sm); overflow: hidden; }
        .solution-grid .card:first-child .card-img img { height: 260px; }
        @media (max-width: 768px) {
            .solution-grid { grid-template-columns: 1fr; }
            .solution-grid .card:first-child { grid-column: 1; grid-template-columns: 1fr; }
            .solution-grid .card:first-child .card-img img { height: 200px; }
        }

        /* ===== Scenario Cards ===== */
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .scenario-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            border: 1px solid rgba(0,0,0,0.03);
        }
        .scenario-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
        .scenario-card .icon { font-size: 40px; color: var(--accent); margin-bottom: 16px; }
        .scenario-card h4 { font-size: 20px; margin-bottom: 8px; }
        .scenario-card p { font-size: 15px; color: var(--text-muted); line-height: 1.6; }
        @media (max-width: 768px) { .scenario-grid { grid-template-columns: 1fr 1fr; } }
        @media (max-width: 520px) { .scenario-grid { grid-template-columns: 1fr; } }

        /* ===== Process / Steps ===== */
        .process-steps {
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
            justify-content: center;
            counter-reset: step;
        }
        .step-item {
            flex: 1 1 200px;
            max-width: 260px;
            text-align: center;
            position: relative;
            padding-top: 60px;
        }
        .step-item::before {
            counter-increment: step;
            content: counter(step);
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-weight: 900;
            font-size: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 12px rgba(26,58,92,0.25);
        }
        .step-item h4 { font-size: 18px; margin-bottom: 8px; }
        .step-item p { font-size: 14px; color: var(--text-muted); line-height: 1.6; }
        .step-item:not(:last-child)::after {
            content: '→';
            position: absolute;
            top: 12px;
            right: -24px;
            font-size: 28px;
            color: var(--accent);
            font-weight: 300;
        }
        @media (max-width: 768px) { .process-steps { gap: 24px; } .step-item { flex: 1 1 160px; } .step-item:not(:last-child)::after { display: none; } }
        @media (max-width: 520px) { .step-item { flex: 1 1 100%; max-width: 100%; } }

        /* ===== Testimonials ===== */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .testimonial-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid rgba(0,0,0,0.03);
            transition: all var(--transition);
        }
        .testimonial-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
        .testimonial-card .quote { font-size: 15px; color: var(--text-body); line-height: 1.7; font-style: italic; margin-bottom: 20px; position: relative; padding-left: 16px; border-left: 3px solid var(--accent); }
        .testimonial-card .author { display: flex; align-items: center; gap: 12px; }
        .testimonial-card .author img { width: 48px; height: 48px; border-radius: 50%; object-fit: cover; }
        .testimonial-card .author .name { font-weight: 600; font-size: 15px; color: var(--text-heading); }
        .testimonial-card .author .role { font-size: 13px; color: var(--text-muted); }
        @media (max-width: 768px) { .testimonial-grid { grid-template-columns: 1fr 1fr; } }
        @media (max-width: 520px) { .testimonial-grid { grid-template-columns: 1fr; } }

        /* ===== FAQ Accordion ===== */
        .faq-list { max-width: 780px; margin: 0 auto; }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover { box-shadow: var(--shadow-sm); }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            background: none;
            border: none;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-heading);
            text-align: left;
            transition: background var(--transition);
            gap: 16px;
        }
        .faq-question:hover { background: rgba(0,0,0,0.02); }
        .faq-question:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; }
        .faq-question .icon { font-size: 18px; color: var(--accent); transition: transform var(--transition); flex-shrink: 0; }
        .faq-item.open .faq-question .icon { transform: rotate(180deg); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 24px;
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer { max-height: 300px; padding: 0 24px 20px; }
        @media (max-width: 640px) { .faq-question { padding: 14px 16px; font-size: 15px; } .faq-answer { padding: 0 16px; } .faq-item.open .faq-answer { padding: 0 16px 16px; } }

        /* ===== CTA Section ===== */
        .cta-section {
            background: var(--primary);
            color: #fff;
            text-align: center;
            padding: 80px 24px;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            opacity: 0.08;
            z-index: 0;
        }
        .cta-section .container-custom { position: relative; z-index: 1; }
        .cta-section h2 { color: #fff; font-size: 40px; margin-bottom: 12px; }
        .cta-section p { color: rgba(255,255,255,0.85); font-size: 18px; max-width: 600px; margin: 0 auto 32px; }
        .cta-section .btn-white { font-size: 18px; padding: 16px 40px; }
        @media (max-width: 640px) { .cta-section { padding: 48px 16px; } .cta-section h2 { font-size: 28px; } .cta-section p { font-size: 16px; } }

        /* ===== Footer (reused from index) ===== */
        .site-footer {
            background: var(--bg-dark);
            color: var(--text-light);
            padding: 60px 0 0;
        }
        .site-footer a { color: var(--text-light); transition: color var(--transition); }
        .site-footer a:hover { color: var(--accent); }
        .footer-top {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .footer-brand h3 { font-size: 22px; color: #fff; margin-bottom: 12px; }
        .footer-brand p { font-size: 14px; line-height: 1.7; max-width: 360px; }
        .footer-col h4 { font-size: 16px; color: #fff; margin-bottom: 16px; font-weight: 600; }
        .footer-col a { display: block; font-size: 14px; padding: 4px 0; }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            padding: 24px 0;
            font-size: 13px;
            gap: 16px;
        }
        .footer-bottom a { margin: 0 8px; }
        @media (max-width: 768px) {
            .footer-top { grid-template-columns: 1fr 1fr; gap: 32px; }
            .footer-brand { grid-column: 1 / -1; }
        }
        @media (max-width: 520px) {
            .footer-top { 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; }
        .mb-16 { margin-bottom: 16px; }
        .mb-24 { margin-bottom: 24px; }
        .mb-32 { margin-bottom: 32px; }
        .gap-8 { gap: 8px; }
        .gap-16 { gap: 16px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }

        /* ===== Responsive spacing tweaks ===== */
        @media (max-width: 640px) {
            .hero-content h1 { font-size: 36px; }
            .section-block { padding: 48px 0; }
            .hero-section { min-height: 70vh; padding: 100px 16px 48px; }
        }

        /* ===== Foundation override: remove default button radius if needed ===== */
        .button { border-radius: var(--radius-sm); }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1A3A5C;
            --primary-light: #2A5A8C;
            --primary-dark: #0F2440;
            --accent: #D4A843;
            --accent-light: #E8C56A;
            --accent-dark: #B8922E;
            --bg: #F5F7FA;
            --bg-card: #FFFFFF;
            --bg-dark: #1E293B;
            --text: #2C3E50;
            --text-heading: #111827;
            --text-light: #6B7A8F;
            --text-white: #FFFFFF;
            --border: #E2E8F0;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.05);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
            --shadow-lg: 0 8px 32px rgba(0,0,0,0.12);
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Noto Sans SC', 'Open Sans', system-ui, -apple-system, sans-serif;
            --container: 1200px;
            --nav-height: 64px;
            --section-gap: 80px;
            --section-gap-mobile: 48px;
        }

        /* ===== Reset ===== */
        *, *::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: 1.6;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            padding-top: var(--nav-height);
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover, a:focus { color: var(--accent); }
        a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
        button { cursor: pointer; font-family: inherit; border: none; background: none; }
        input, textarea { font-family: inherit; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { color: var(--text-heading); font-weight: 700; line-height: 1.3; }
        .container-custom {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }
        @media (max-width: 640px) {
            .container-custom { padding: 0 16px; }
        }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            padding: 8px 16px;
            display: flex;
            justify-content: center;
            pointer-events: none;
        }
        .nav-dock {
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-radius: var(--radius-lg);
            box-shadow: 0 4px 20px rgba(0,0,0,0.08);
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 20px;
            height: 56px;
            max-width: 1100px;
            width: 100%;
            pointer-events: auto;
            border: 1px solid rgba(255,255,255,0.3);
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 22px;
            font-weight: 700;
            color: var(--primary);
            text-decoration: none;
            letter-spacing: -0.5px;
        }
        .nav-logo:hover { color: var(--primary); }
        .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            background: var(--primary);
            color: #fff;
            border-radius: 8px;
            font-size: 18px;
            font-weight: 700;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .nav-links a {
            padding: 8px 18px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            position: relative;
        }
        .nav-links a:hover { color: var(--primary); background: rgba(26,58,92,0.06); }
        .nav-links a.active {
            color: var(--primary);
            background: rgba(26,58,92,0.1);
            font-weight: 600;
        }
        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--accent);
            border-radius: 2px;
        }
        .nav-cta {
            padding: 8px 22px;
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            background: var(--primary);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            white-space: nowrap;
        }
        .nav-cta:hover { background: var(--accent); color: #fff; transform: translateY(-1px); box-shadow: var(--shadow-md); }
        .nav-cta:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
        .hamburger {
            display: none;
            font-size: 22px;
            color: var(--text-heading);
            padding: 6px 10px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .hamburger:hover { background: rgba(0,0,0,0.05); }
        @media (max-width: 768px) {
            .nav-links { display: none; }
            .nav-cta { display: none; }
            .hamburger { display: block; }
            .nav-dock { padding: 0 16px; }
            .nav-links.open {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: calc(100% + 8px);
                left: 0;
                right: 0;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(14px);
                border-radius: var(--radius-md);
                box-shadow: var(--shadow-lg);
                padding: 12px 8px;
                gap: 2px;
                border: 1px solid var(--border);
            }
            .nav-links.open a { padding: 12px 16px; width: 100%; }
            .nav-links.open a.active::after { display: none; }
            .nav-links.open + .nav-cta { display: block; margin-top: 8px; }
        }
        @media (max-width: 640px) {
            .nav-dock { height: 52px; border-radius: 14px; }
            .nav-logo { font-size: 20px; }
            .logo-mark { width: 28px; height: 28px; font-size: 15px; }
        }

        /* ===== 文章 Hero ===== */
        .article-hero {
            position: relative;
            background: var(--primary-dark);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            padding: 60px 0 50px;
            min-height: 240px;
            display: flex;
            align-items: center;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,36,64,0.85) 0%, rgba(26,58,92,0.7) 100%);
            z-index: 1;
        }
        .article-hero .container-custom { position: relative; z-index: 2; }
        .article-breadcrumb {
            font-size: 13px;
            color: rgba(255,255,255,0.7);
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 4px;
        }
        .article-breadcrumb a { color: rgba(255,255,255,0.7); }
        .article-breadcrumb a:hover { color: var(--accent); }
        .article-breadcrumb .sep { margin: 0 4px; color: rgba(255,255,255,0.4); }
        .article-breadcrumb .current { color: rgba(255,255,255,0.95); }
        .article-hero h1 {
            font-size: 36px;
            color: #fff;
            max-width: 860px;
            line-height: 1.35;
            margin-bottom: 16px;
            font-weight: 700;
            text-shadow: 0 2px 8px rgba(0,0,0,0.2);
        }
        .article-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 18px;
            font-size: 14px;
            color: rgba(255,255,255,0.8);
        }
        .article-meta .meta-item { display: flex; align-items: center; gap: 6px; }
        .article-meta .meta-item i { opacity: 0.7; font-size: 13px; }
        .article-meta .category-tag {
            display: inline-block;
            padding: 3px 14px;
            background: rgba(212,168,67,0.25);
            color: var(--accent-light);
            border-radius: 20px;
            font-size: 13px;
            font-weight: 500;
        }
        @media (max-width: 768px) {
            .article-hero { padding: 40px 0 36px; min-height: 200px; }
            .article-hero h1 { font-size: 26px; }
            .article-meta { gap: 12px; font-size: 13px; }
        }
        @media (max-width: 640px) {
            .article-hero { padding: 32px 0 28px; min-height: 180px; }
            .article-hero h1 { font-size: 22px; }
            .article-meta { flex-direction: column; align-items: flex-start; gap: 8px; }
        }

        /* ===== 正文区域 ===== */
        .article-main {
            padding: 50px 0 60px;
            background: #fff;
        }
        .article-body {
            max-width: 800px;
            margin: 0 auto;
            font-size: 17px;
            line-height: 1.85;
            color: var(--text);
        }
        .article-body p { margin-bottom: 1.6em; }
        .article-body h2 {
            font-size: 26px;
            margin: 2em 0 0.8em;
            padding-bottom: 8px;
            border-bottom: 2px solid var(--border);
            color: var(--text-heading);
        }
        .article-body h3 {
            font-size: 20px;
            margin: 1.6em 0 0.6em;
            color: var(--text-heading);
        }
        .article-body h4 {
            font-size: 18px;
            margin: 1.4em 0 0.5em;
            color: var(--text-heading);
        }
        .article-body ul, .article-body ol {
            margin: 0 0 1.6em 1.6em;
        }
        .article-body ul { list-style: disc; }
        .article-body ol { list-style: decimal; }
        .article-body li { margin-bottom: 0.4em; }
        .article-body blockquote {
            margin: 1.8em 0;
            padding: 16px 24px;
            border-left: 4px solid var(--accent);
            background: rgba(212,168,67,0.06);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            font-style: italic;
            color: var(--text-light);
        }
        .article-body blockquote p:last-child { margin-bottom: 0; }
        .article-body img {
            margin: 1.8em auto;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-md);
            max-width: 100%;
            height: auto;
        }
        .article-body a { color: var(--primary); font-weight: 500; text-decoration: underline; text-underline-offset: 2px; }
        .article-body a:hover { color: var(--accent); }
        .article-body code {
            background: #F1F5F9;
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.9em;
            font-family: 'SF Mono', 'Fira Code', monospace;
        }
        .article-body pre {
            background: #1E293B;
            color: #E2E8F0;
            padding: 20px 24px;
            border-radius: var(--radius-md);
            overflow-x: auto;
            margin: 1.8em 0;
            font-size: 14px;
            line-height: 1.6;
        }
        .article-body pre code { background: none; color: inherit; padding: 0; font-size: inherit; }
        .article-body hr {
            margin: 2.5em 0;
            border: none;
            height: 1px;
            background: var(--border);
        }
        .article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.8em 0;
            font-size: 15px;
        }
        .article-body th, .article-body td {
            padding: 12px 16px;
            border: 1px solid var(--border);
            text-align: left;
        }
        .article-body th { background: var(--primary); color: #fff; font-weight: 600; }
        .article-body tr:nth-child(even) { background: #F8FAFC; }
        .not-found-container {
            text-align: center;
            padding: 60px 20px;
            max-width: 600px;
            margin: 0 auto;
        }
        .not-found-container i { font-size: 56px; color: var(--text-light); margin-bottom: 20px; opacity: 0.5; }
        .not-found-container h2 { font-size: 28px; color: var(--text-heading); margin-bottom: 12px; }
        .not-found-container p { color: var(--text-light); margin-bottom: 24px; font-size: 16px; }
        .not-found-container .btn { display: inline-block; padding: 12px 32px; }
        @media (max-width: 768px) {
            .article-main { padding: 36px 0 40px; }
            .article-body { font-size: 16px; }
            .article-body h2 { font-size: 22px; }
            .article-body h3 { font-size: 18px; }
            .article-body blockquote { padding: 12px 16px; }
        }
        @media (max-width: 640px) {
            .article-body { font-size: 15px; }
            .article-body h2 { font-size: 20px; }
        }

        /* ===== 相关推荐 ===== */
        .related-section {
            padding: 60px 0 70px;
            background: var(--bg);
        }
        .related-section .section-title {
            font-size: 28px;
            text-align: center;
            margin-bottom: 40px;
            color: var(--text-heading);
            position: relative;
        }
        .related-section .section-title::after {
            content: '';
            display: block;
            width: 50px;
            height: 3px;
            background: var(--accent);
            margin: 12px auto 0;
            border-radius: 2px;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-bottom: 40px;
        }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            border: 1px solid var(--border);
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .related-card .card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }
        .related-card .card-body { padding: 18px 20px 20px; }
        .related-card .card-body h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 8px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body h3 a { color: var(--text-heading); }
        .related-card .card-body h3 a:hover { color: var(--primary); }
        .related-card .card-body .card-date {
            font-size: 13px;
            color: var(--text-light);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .related-card .card-body .card-date i { font-size: 12px; }
        .back-home-wrap { text-align: center; }
        .back-home-wrap .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 28px;
            font-size: 15px;
            font-weight: 500;
            color: var(--primary);
            border: 1.5px solid var(--primary);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            background: transparent;
        }
        .back-home-wrap .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            box-shadow: var(--shadow-md);
        }
        @media (max-width: 900px) {
            .related-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 640px) {
            .related-section { padding: 40px 0 50px; }
            .related-section .section-title { font-size: 22px; margin-bottom: 28px; }
            .related-grid { grid-template-columns: 1fr; gap: 16px; }
            .related-card .card-img { height: 160px; }
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.8);
            padding: 56px 0 0;
        }
        .footer-top {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }
        .footer-brand h3 {
            font-size: 22px;
            color: #fff;
            margin-bottom: 10px;
            font-weight: 700;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255,255,255,0.6);
            max-width: 340px;
        }
        .footer-col h4 {
            font-size: 15px;
            color: #fff;
            margin-bottom: 16px;
            font-weight: 600;
            letter-spacing: 0.5px;
        }
        .footer-col a {
            display: block;
            font-size: 14px;
            color: rgba(255,255,255,0.6);
            padding: 4px 0;
            transition: color var(--transition);
        }
        .footer-col a:hover { color: var(--accent); }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
            font-size: 13px;
            color: rgba(255,255,255,0.5);
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom a {
            color: rgba(255,255,255,0.6);
            margin-left: 20px;
            transition: color var(--transition);
        }
        .footer-bottom a:hover { color: var(--accent); }
        @media (max-width: 768px) {
            .footer-top { grid-template-columns: 1fr 1fr; gap: 30px; }
            .footer-brand { grid-column: 1 / -1; }
        }
        @media (max-width: 640px) {
            .site-footer { padding: 40px 0 0; }
            .footer-top { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .footer-bottom a { margin: 0 10px; }
        }

        /* ===== 通用按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            font-size: 15px;
            font-weight: 600;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            border: none;
            text-decoration: none;
            cursor: pointer;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--accent);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
        }
        .btn-primary:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

        /* ===== 工具类 ===== */
        .text-center { text-align: center; }
        .mt-20 { margin-top: 20px; }
        .mb-20 { margin-bottom: 20px; }
        @media (max-width: 640px) {
            .hide-mobile { display: none !important; }
        }

/* roulang page: category2 */
/* ===== Design Variables ===== */
        :root {
            --primary: #1A3A5C;
            --primary-light: #2A5A7C;
            --primary-dark: #0F2A3F;
            --accent: #D4A843;
            --accent-light: #E8C46A;
            --accent-dark: #B8922E;
            --bg: #F5F7FA;
            --bg-card: #FFFFFF;
            --bg-dark: #1E293B;
            --text-primary: #111827;
            --text-body: #2C3E50;
            --text-muted: #6B7A8F;
            --text-light: #94A3B8;
            --border: #E2E8F0;
            --border-light: #F1F5F9;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.06);
            --shadow-lg: 0 8px 32px rgba(0,0,0,0.10);
            --shadow-hover: 0 12px 36px rgba(0,0,0,0.12);
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Noto Sans SC', 'Open Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --container-max: 1200px;
            --nav-height: 64px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-body);
            background: var(--bg);
            min-height: 100vh;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--accent); }
        a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
        button, input, textarea, select { font-family: inherit; font-size: inherit; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { color: var(--text-primary); font-weight: 700; line-height: 1.3; letter-spacing: -0.01em; }

        /* ===== Container ===== */
        .container-custom {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 640px) {
            .container-custom { padding: 0 16px; }
        }

        /* ===== Navigation Dock ===== */
        .site-header {
            position: fixed;
            top: 12px;
            left: 0;
            right: 0;
            z-index: 1000;
            display: flex;
            justify-content: center;
            pointer-events: none;
        }
        .nav-dock {
            pointer-events: auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 90%;
            max-width: var(--container-max);
            height: var(--nav-height);
            padding: 0 24px;
            background: rgba(255,255,255,0.88);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            border: 1px solid rgba(255,255,255,0.5);
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 22px;
            font-weight: 900;
            color: var(--primary);
            letter-spacing: -0.02em;
        }
        .nav-logo .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-sm);
            font-size: 20px;
            font-weight: 900;
        }
        .nav-logo:hover { color: var(--primary); opacity: 0.9; }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-links a {
            padding: 8px 18px;
            border-radius: var(--radius-md);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-body);
            transition: var(--transition);
            position: relative;
        }
        .nav-links a:hover { background: rgba(26,58,92,0.06); color: var(--primary); }
        .nav-links a.active {
            background: var(--primary);
            color: #fff;
            font-weight: 600;
        }
        .nav-links a.active:hover { background: var(--primary-light); color: #fff; }
        .nav-cta {
            padding: 10px 24px;
            border-radius: var(--radius-md);
            background: var(--accent);
            color: #fff;
            font-weight: 600;
            font-size: 14px;
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-cta:hover { background: var(--accent-dark); color: #fff; transform: translateY(-1px); }
        .nav-cta:active { transform: translateY(0); }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 22px;
            color: var(--text-primary);
            cursor: pointer;
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .hamburger:hover { background: rgba(0,0,0,0.04); }

        /* Mobile Nav */
        @media (max-width: 768px) {
            .site-header { top: 8px; }
            .nav-dock { padding: 0 16px; height: 58px; }
            .nav-links {
                position: fixed;
                top: 70px;
                left: 5%;
                right: 5%;
                width: 90%;
                background: rgba(255,255,255,0.96);
                backdrop-filter: blur(16px);
                border-radius: var(--radius-lg);
                box-shadow: var(--shadow-lg);
                flex-direction: column;
                padding: 16px 0;
                display: none;
                border: 1px solid var(--border);
            }
            .nav-links.open { display: flex; }
            .nav-links a {
                width: 100%;
                text-align: center;
                padding: 14px 20px;
                border-radius: 0;
                font-size: 16px;
            }
            .nav-links a.active { background: var(--primary); color: #fff; border-radius: 0; }
            .nav-cta { display: none; }
            .hamburger { display: block; }
            .nav-dock .nav-cta.mobile-show {
                display: inline-flex;
                margin-left: auto;
                margin-right: 8px;
                padding: 8px 18px;
                font-size: 13px;
            }
        }
        @media (max-width: 640px) {
            .nav-dock { width: 94%; }
            .nav-links { left: 3%; right: 3%; width: 94%; }
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            min-height: 520px;
            display: flex;
            align-items: center;
            padding: 120px 0 80px;
            background: var(--primary-dark);
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,42,63,0.88) 0%, rgba(26,58,92,0.75) 60%, rgba(212,168,67,0.20) 100%);
            z-index: 1;
        }
        .hero-section .container-custom { position: relative; z-index: 2; width: 100%; }
        .hero-content { max-width: 780px; }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(212,168,67,0.20);
            color: var(--accent);
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 20px;
            backdrop-filter: blur(4px);
            border: 1px solid rgba(212,168,67,0.25);
        }
        .hero-badge i { font-size: 12px; }
        .hero-title {
            font-size: 48px;
            font-weight: 900;
            color: #fff;
            line-height: 1.15;
            margin-bottom: 16px;
            letter-spacing: -0.02em;
        }
        .hero-title span { color: var(--accent); }
        .hero-sub {
            font-size: 20px;
            color: rgba(255,255,255,0.85);
            line-height: 1.6;
            margin-bottom: 32px;
            max-width: 640px;
            font-weight: 400;
        }
        .hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
        .hero-actions .btn-primary {
            padding: 14px 36px;
            border-radius: var(--radius-md);
            background: var(--accent);
            color: #fff;
            font-weight: 700;
            font-size: 16px;
            transition: var(--transition);
            border: none;
            cursor: pointer;
        }
        .hero-actions .btn-primary:hover { background: var(--accent-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(212,168,67,0.35); }
        .hero-actions .btn-secondary {
            padding: 14px 36px;
            border-radius: var(--radius-md);
            background: transparent;
            color: #fff;
            font-weight: 600;
            font-size: 16px;
            border: 2px solid rgba(255,255,255,0.35);
            transition: var(--transition);
            cursor: pointer;
        }
        .hero-actions .btn-secondary:hover { background: rgba(255,255,255,0.10); border-color: rgba(255,255,255,0.6); color: #fff; }

        @media (max-width: 768px) {
            .hero-section { min-height: 420px; padding: 100px 0 60px; }
            .hero-title { font-size: 32px; }
            .hero-sub { font-size: 17px; }
            .hero-actions .btn-primary,
            .hero-actions .btn-secondary { padding: 12px 28px; font-size: 15px; width: 100%; text-align: center; }
        }
        @media (max-width: 640px) {
            .hero-title { font-size: 28px; }
            .hero-sub { font-size: 16px; }
        }

        /* ===== Section Common ===== */
        .section-block {
            padding: 80px 0;
        }
        .section-block-alt { background: var(--bg-card); }
        .section-block-dark { background: var(--bg-dark); color: rgba(255,255,255,0.85); }
        .section-block-dark h2,
        .section-block-dark h3,
        .section-block-dark .section-title { color: #fff; }
        .section-title {
            font-size: 36px;
            font-weight: 800;
            margin-bottom: 12px;
            text-align: center;
        }
        .section-sub {
            font-size: 17px;
            color: var(--text-muted);
            text-align: center;
            max-width: 640px;
            margin: 0 auto 48px;
            line-height: 1.7;
        }
        .section-block-dark .section-sub { color: rgba(255,255,255,0.65); }

        @media (max-width: 768px) {
            .section-block { padding: 56px 0; }
            .section-title { font-size: 28px; }
            .section-sub { font-size: 16px; margin-bottom: 32px; }
        }

        /* ===== Cards ===== */
        .card-base {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            padding: 28px 24px;
            transition: var(--transition);
            border: 1px solid var(--border-light);
        }
        .card-base:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: var(--border);
        }
        .card-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: #fff;
            margin-bottom: 18px;
            background: var(--primary);
        }
        .card-icon.accent { background: var(--accent); }
        .card-icon.outline { background: transparent; border: 2px solid var(--primary); color: var(--primary); }
        .card-base h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .card-base p {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ===== Grid Layouts ===== */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .grid-mixed {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 28px;
        }
        .grid-mixed-rev {
            display: grid;
            grid-template-columns: 1fr 1fr 2fr;
            gap: 28px;
        }

        @media (max-width: 1024px) {
            .grid-4 { grid-template-columns: repeat(2, 1fr); }
            .grid-mixed, .grid-mixed-rev { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .grid-3 { grid-template-columns: repeat(2, 1fr); }
            .grid-2 { grid-template-columns: 1fr; }
            .grid-4 { grid-template-columns: repeat(2, 1fr); }
            .grid-mixed, .grid-mixed-rev { grid-template-columns: 1fr; }
        }
        @media (max-width: 640px) {
            .grid-3 { grid-template-columns: 1fr; }
            .grid-4 { grid-template-columns: 1fr; }
        }

        /* ===== Steps / Timeline ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            position: relative;
        }
        .step-card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
        .step-number {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 20px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            counter-increment: step;
        }
        .step-card h4 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
        .step-card p { font-size: 14px; color: var(--text-muted); line-height: 1.6; }

        @media (max-width: 1024px) {
            .steps-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 640px) {
            .steps-grid { grid-template-columns: 1fr; }
        }

        /* ===== FAQ ===== */
        .faq-list { max-width: 820px; margin: 0 auto; }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--border); }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            cursor: pointer;
            font-size: 17px;
            font-weight: 600;
            color: var(--text-primary);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            transition: var(--transition);
            gap: 16px;
        }
        .faq-question::after {
            content: '\f107';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 18px;
            color: var(--text-muted);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question::after { transform: rotate(180deg); color: var(--primary); }
        .faq-question:hover { color: var(--primary); }
        .faq-answer {
            padding: 0 24px 20px;
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.8;
            display: none;
        }
        .faq-item.open .faq-answer { display: block; }
        .faq-item.open { border-color: var(--primary); box-shadow: var(--shadow-md); }

        @media (max-width: 640px) {
            .faq-question { font-size: 15px; padding: 16px 18px; }
            .faq-answer { padding: 0 18px 16px; font-size: 14px; }
        }

        /* ===== CTA ===== */
        .cta-block {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            border-radius: var(--radius-xl);
            padding: 60px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-block::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            opacity: 0.06;
            mix-blend-mode: overlay;
        }
        .cta-block h2 {
            font-size: 34px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
            position: relative;
        }
        .cta-block p {
            font-size: 18px;
            color: rgba(255,255,255,0.8);
            max-width: 540px;
            margin: 0 auto 28px;
            position: relative;
        }
        .cta-block .btn-cta {
            display: inline-flex;
            padding: 16px 44px;
            border-radius: var(--radius-md);
            background: var(--accent);
            color: #fff;
            font-weight: 700;
            font-size: 17px;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            position: relative;
        }
        .cta-block .btn-cta:hover { background: var(--accent-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 28px rgba(212,168,67,0.40); }

        @media (max-width: 768px) {
            .cta-block { padding: 40px 24px; }
            .cta-block h2 { font-size: 26px; }
            .cta-block p { font-size: 16px; }
            .cta-block .btn-cta { padding: 14px 32px; font-size: 16px; width: 100%; }
        }

        /* ===== Stats / Numbers ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }
        .stat-item h3 {
            font-size: 40px;
            font-weight: 900;
            color: var(--accent);
            margin-bottom: 4px;
        }
        .stat-item p {
            font-size: 15px;
            color: rgba(255,255,255,0.7);
            font-weight: 400;
        }
        @media (max-width: 768px) {
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .stat-item h3 { font-size: 32px; }
        }
        @media (max-width: 640px) {
            .stats-grid { gap: 16px; }
            .stat-item h3 { font-size: 28px; }
        }

        /* ===== Guarantee / Feature List ===== */
        .guarantee-list {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .guarantee-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            padding: 24px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .guarantee-item:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
        .guarantee-item i {
            font-size: 26px;
            color: var(--accent);
            flex-shrink: 0;
            margin-top: 2px;
        }
        .guarantee-item h4 { font-size: 17px; font-weight: 700; margin-bottom: 4px; }
        .guarantee-item p { font-size: 14px; color: var(--text-muted); line-height: 1.6; }

        @media (max-width: 768px) {
            .guarantee-list { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 640px) {
            .guarantee-list { grid-template-columns: 1fr; }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.7);
            padding: 56px 0 32px;
        }
        .footer-top {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 36px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
            margin-bottom: 28px;
        }
        .footer-brand h3 {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 10px;
        }
        .footer-brand p {
            font-size: 14px;
            color: rgba(255,255,255,0.55);
            line-height: 1.7;
            max-width: 360px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }
        .footer-col a {
            display: block;
            color: rgba(255,255,255,0.6);
            font-size: 14px;
            padding: 4px 0;
            transition: var(--transition);
        }
        .footer-col a:hover { color: var(--accent); padding-left: 4px; }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: rgba(255,255,255,0.45);
        }
        .footer-bottom a {
            color: rgba(255,255,255,0.5);
            margin-left: 20px;
            font-size: 13px;
        }
        .footer-bottom a:hover { color: var(--accent); }

        @media (max-width: 768px) {
            .footer-top { grid-template-columns: 1fr 1fr; gap: 28px; }
            .footer-brand { grid-column: 1 / -1; }
        }
        @media (max-width: 640px) {
            .footer-top { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; align-items: flex-start; }
            .footer-bottom a { margin-left: 0; margin-right: 16px; }
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            padding: 18px 0;
            font-size: 14px;
            color: var(--text-muted);
            background: var(--bg);
            border-bottom: 1px solid var(--border-light);
        }
        .breadcrumb a { color: var(--text-muted); }
        .breadcrumb a:hover { color: var(--primary); }
        .breadcrumb span { color: var(--text-body); font-weight: 500; }
        .breadcrumb i { margin: 0 8px; font-size: 12px; color: var(--text-light); }

        /* ===== Accordion override ===== */
        .faq-item .faq-question:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; border-radius: var(--radius-md); }

        /* ===== Button focus ===== */
        .btn-primary:focus-visible,
        .btn-secondary:focus-visible,
        .btn-cta:focus-visible,
        .nav-cta:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

        /* ===== Responsive fine-tune ===== */
        @media (max-width: 480px) {
            .hero-title { font-size: 24px; }
            .hero-sub { font-size: 15px; }
            .section-title { font-size: 24px; }
            .card-base { padding: 20px 16px; }
            .cta-block h2 { font-size: 22px; }
        }