/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #0d1b2a;
            --primary-light: #1b2d44;
            --secondary: #c9952e;
            --secondary-light: #e8b84b;
            --secondary-dark: #a87a1e;
            --accent: #f0c75e;
            --bg-light: #f0f2f5;
            --bg-white: #ffffff;
            --bg-dark: #0a1628;
            --text-dark: #1a1a2e;
            --text-body: #2d3748;
            --text-muted: #6b7280;
            --text-light: #f8fafc;
            --border-color: #e2e6ea;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 8px 24px rgba(0,0,0,0.10);
            --shadow-lg: 0 20px 48px rgba(0,0,0,0.14);
            --shadow-xl: 0 32px 64px rgba(0,0,0,0.18);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; font-size: 16px; }
        body {
            font-family: var(--font-family);
            color: var(--text-body);
            background: var(--bg-light);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: inherit; text-decoration: none; transition: var(--transition); }
        a:hover, a:focus { color: var(--secondary); }
        button, input, textarea { font-family: inherit; font-size: 1rem; transition: var(--transition); }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { color: var(--text-dark); font-weight: 700; line-height: 1.2; }

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

        /* ===== Header / Navigation ===== */
        .site-header {
            position: fixed;
            top: 20px;
            left: 0;
            right: 0;
            z-index: 1000;
            pointer-events: none;
        }
        .site-header .container {
            pointer-events: all;
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            background: rgba(255,255,255,0.85);
            backdrop-filter: blur(18px) saturate(1.4);
            -webkit-backdrop-filter: blur(18px) saturate(1.4);
            border-radius: var(--radius-xl);
            padding: 10px 28px;
            box-shadow: 0 4px 20px rgba(0,0,0,0.08);
            border: 1px solid rgba(255,255,255,0.5);
        }
        .logo {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.02em;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .logo i { color: var(--secondary); font-size: 1.4rem; }
        .logo:hover { color: var(--secondary); }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .nav-links a {
            padding: 8px 20px;
            border-radius: var(--radius-lg);
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-body);
            transition: var(--transition);
            position: relative;
        }
        .nav-links a:hover,
        .nav-links a:focus {
            background: var(--primary);
            color: #fff;
        }
        .nav-links a.active {
            background: var(--primary);
            color: #fff;
        }
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.6rem;
            color: var(--primary);
            cursor: pointer;
            padding: 4px 8px;
            border-radius: var(--radius-sm);
        }
        .menu-toggle:hover { background: rgba(0,0,0,0.05); }

        /* Mobile Nav */
        @media screen and (max-width: 768px) {
            .site-header { top: 12px; }
            .nav-wrapper { padding: 8px 16px; }
            .logo { font-size: 1.25rem; }
            .nav-links {
                display: none;
                position: absolute;
                top: calc(100% + 8px);
                left: 16px;
                right: 16px;
                background: rgba(255,255,255,0.96);
                backdrop-filter: blur(18px);
                border-radius: var(--radius-md);
                flex-direction: column;
                padding: 12px;
                box-shadow: var(--shadow-lg);
                border: 1px solid var(--border-color);
            }
            .nav-links.open { display: flex; }
            .nav-links a {
                width: 100%;
                text-align: center;
                padding: 12px 16px;
            }
            .menu-toggle { display: block; }
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, rgba(13,27,42,0.82) 0%, rgba(10,22,40,0.70) 100%), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            color: #fff;
            text-align: center;
            padding: 120px 24px 80px;
            overflow: hidden;
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 120px;
            background: linear-gradient(to top, var(--bg-light) 0%, transparent 100%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 820px;
        }
        .hero-badge {
            display: inline-block;
            background: rgba(201,149,46,0.20);
            border: 1px solid rgba(201,149,46,0.35);
            color: var(--secondary-light);
            padding: 6px 20px;
            border-radius: var(--radius-xl);
            font-size: 0.85rem;
            font-weight: 500;
            letter-spacing: 0.04em;
            margin-bottom: 24px;
            backdrop-filter: blur(4px);
        }
        .hero-title {
            font-size: clamp(2.6rem, 7vw, 4.8rem);
            font-weight: 800;
            color: #fff;
            line-height: 1.1;
            letter-spacing: -0.03em;
            margin-bottom: 20px;
        }
        .hero-title span { color: var(--secondary-light); }
        .hero-sub {
            font-size: clamp(1.05rem, 2vw, 1.35rem);
            color: rgba(255,255,255,0.80);
            max-width: 640px;
            margin: 0 auto 36px;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 34px;
            border-radius: var(--radius-lg);
            font-weight: 600;
            font-size: 1rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
        }
        .btn-primary {
            background: var(--secondary);
            color: var(--primary);
        }
        .btn-primary:hover, .btn-primary:focus {
            background: var(--secondary-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(201,149,46,0.35);
        }
        .btn-outline {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255,255,255,0.30);
        }
        .btn-outline:hover, .btn-outline:focus {
            border-color: var(--secondary-light);
            color: var(--secondary-light);
            transform: translateY(-2px);
        }
        .btn-light {
            background: #fff;
            color: var(--primary);
        }
        .btn-light:hover, .btn-light:focus {
            background: var(--bg-light);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        @media screen and (max-width: 520px) {
            .hero { padding: 100px 16px 60px; min-height: 90vh; }
            .hero-actions { flex-direction: column; align-items: center; }
            .btn { width: 100%; justify-content: center; }
        }

        /* ===== Section Common ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt { background: var(--bg-white); }
        .section-dark {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.85);
        }
        .section-dark h2, .section-dark h3 { color: #fff; }
        .section-header {
            text-align: center;
            margin-bottom: 56px;
        }
        .section-header h2 {
            font-size: clamp(2rem, 4vw, 2.8rem);
            font-weight: 700;
            margin-bottom: 12px;
            letter-spacing: -0.02em;
        }
        .section-header p {
            font-size: 1.1rem;
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.7;
        }
        .section-header .badge {
            display: inline-block;
            background: rgba(201,149,46,0.10);
            color: var(--secondary-dark);
            padding: 4px 16px;
            border-radius: var(--radius-xl);
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 12px;
            border: 1px solid rgba(201,149,46,0.15);
        }
        .section-dark .section-header .badge {
            background: rgba(201,149,46,0.15);
            border-color: rgba(201,149,46,0.25);
            color: var(--secondary-light);
        }
        .section-dark .section-header p { color: rgba(255,255,255,0.60); }

        @media screen and (max-width: 768px) {
            .section { padding: 56px 0; }
            .section-header { margin-bottom: 36px; }
        }

        /* ===== About / Intro ===== */
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .intro-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            background: var(--bg-white);
        }
        .intro-image img {
            width: 100%;
            height: 400px;
            object-fit: cover;
            transition: var(--transition);
        }
        .intro-image:hover img { transform: scale(1.02); }
        .intro-text h3 {
            font-size: 1.8rem;
            margin-bottom: 16px;
        }
        .intro-text p {
            font-size: 1.05rem;
            line-height: 1.8;
            color: var(--text-muted);
            margin-bottom: 16px;
        }
        .intro-text .highlight {
            color: var(--secondary-dark);
            font-weight: 600;
        }
        @media screen and (max-width: 768px) {
            .intro-grid { grid-template-columns: 1fr; gap: 32px; }
            .intro-image img { height: 280px; }
        }

        /* ===== Category Cards ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 28px;
        }
        .category-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid var(--border-color);
        }
        .category-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: var(--secondary);
        }
        .category-card-img {
            height: 200px;
            overflow: hidden;
        }
        .category-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .category-card:hover .category-card-img img { transform: scale(1.05); }
        .category-card-body {
            padding: 24px;
        }
        .category-card-body h3 {
            font-size: 1.25rem;
            margin-bottom: 8px;
        }
        .category-card-body p {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.6;
            margin-bottom: 16px;
        }
        .category-card-body .tag {
            display: inline-block;
            background: rgba(201,149,46,0.08);
            color: var(--secondary-dark);
            padding: 4px 14px;
            border-radius: var(--radius-xl);
            font-size: 0.8rem;
            font-weight: 500;
        }
        .category-card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--secondary-dark);
            font-weight: 600;
            font-size: 0.95rem;
            margin-top: 8px;
        }
        .category-card-link:hover { gap: 12px; color: var(--secondary); }

        /* ===== News / CMS List ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 24px;
        }
        .news-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid var(--border-color);
        }
        .news-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .news-card-img {
            height: 180px;
            overflow: hidden;
        }
        .news-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .news-card:hover .news-card-img img { transform: scale(1.04); }
        .news-card-body {
            padding: 20px;
        }
        .news-card-body .meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 10px;
        }
        .news-card-body .meta .cat {
            background: rgba(13,27,42,0.06);
            padding: 2px 12px;
            border-radius: var(--radius-xl);
            font-weight: 500;
        }
        .news-card-body h4 {
            font-size: 1.05rem;
            margin-bottom: 8px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card-body p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-empty {
            text-align: center;
            padding: 48px 24px;
            color: var(--text-muted);
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px dashed var(--border-color);
        }
        .news-empty i { font-size: 2rem; margin-bottom: 12px; opacity: 0.5; }

        /* ===== Stats ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }
        .stat-item {
            padding: 32px 16px;
            background: rgba(255,255,255,0.04);
            border-radius: var(--radius-md);
            border: 1px solid rgba(255,255,255,0.06);
            transition: var(--transition);
        }
        .stat-item:hover {
            background: rgba(255,255,255,0.08);
            transform: translateY(-4px);
        }
        .stat-number {
            font-size: clamp(2.2rem, 4vw, 3.2rem);
            font-weight: 800;
            color: var(--secondary-light);
            line-height: 1.1;
        }
        .stat-label {
            font-size: 0.95rem;
            color: rgba(255,255,255,0.60);
            margin-top: 8px;
        }
        @media screen and (max-width: 768px) {
            .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
            .stat-item { padding: 24px 12px; }
        }

        /* ===== Featured Services ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 28px;
        }
        .feature-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            text-align: center;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(201,149,46,0.20);
        }
        .feature-icon {
            width: 64px;
            height: 64px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 1.6rem;
            color: var(--secondary-light);
        }
        .feature-card h3 { font-size: 1.15rem; margin-bottom: 10px; }
        .feature-card p { font-size: 0.92rem; color: var(--text-muted); line-height: 1.7; }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            margin-bottom: 16px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: rgba(201,149,46,0.25); }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 24px;
            font-weight: 600;
            font-size: 1.02rem;
            cursor: pointer;
            color: var(--text-dark);
            transition: var(--transition);
            user-select: none;
        }
        .faq-question:hover { color: var(--secondary); }
        .faq-question i { color: var(--secondary); transition: var(--transition); font-size: 0.9rem; }
        .faq-item.active .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            padding: 0 24px 20px;
            color: var(--text-muted);
            line-height: 1.7;
            display: none;
        }
        .faq-item.active .faq-answer { display: block; }
        .section-dark .faq-item {
            background: rgba(255,255,255,0.04);
            border-color: rgba(255,255,255,0.08);
        }
        .section-dark .faq-question { color: #fff; }
        .section-dark .faq-answer { color: rgba(255,255,255,0.65); }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, #0a1628 100%);
            padding: 80px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle at 30% 50%, rgba(201,149,46,0.06) 0%, transparent 60%);
        }
        .cta-content {
            position: relative;
            z-index: 1;
        }
        .cta-content h2 {
            font-size: clamp(1.8rem, 3.5vw, 2.6rem);
            color: #fff;
            margin-bottom: 16px;
        }
        .cta-content p {
            font-size: 1.1rem;
            color: rgba(255,255,255,0.70);
            max-width: 560px;
            margin: 0 auto 32px;
        }
        .cta-content .btn-group {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.65);
            padding: 56px 0 32px;
            border-top: 1px solid rgba(255,255,255,0.05);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo { color: #fff; margin-bottom: 16px; }
        .footer-brand p { font-size: 0.92rem; line-height: 1.7; max-width: 360px; }
        .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            margin-bottom: 16px;
            font-weight: 600;
        }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a {
            font-size: 0.92rem;
            color: rgba(255,255,255,0.55);
        }
        .footer-col ul li a:hover { color: var(--secondary-light); }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.06);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
        }
        .footer-bottom a { color: rgba(255,255,255,0.50); }
        .footer-bottom a:hover { color: var(--secondary-light); }
        .footer-social { display: flex; gap: 16px; }
        .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255,255,255,0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255,255,255,0.50);
            transition: var(--transition);
        }
        .footer-social a:hover {
            background: var(--secondary);
            color: var(--primary);
        }

        @media screen and (max-width: 768px) {
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }

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

        /* ===== Foundation Overrides ===== */
        .row { max-width: var(--max-width); }
        .button { border-radius: var(--radius-lg); font-weight: 600; transition: var(--transition); }
        .button.hollow { border: 2px solid; }

        /* ===== Smooth reveal ===== */
        .reveal { opacity: 0; transform: translateY(20px); transition: opacity 0.6s ease, transform 0.6s ease; }
        .reveal.visible { opacity: 1; transform: translateY(0); }

/* roulang page: article */
:root {
            --primary: #1a3a5c;
            --primary-light: #2a5a8c;
            --primary-dark: #0f2440;
            --accent: #e67e22;
            --accent-light: #f39c12;
            --accent-dark: #d35400;
            --bg-light: #f8f9fa;
            --bg-dark: #0a1628;
            --text-dark: #1a1a2e;
            --text-main: #2c3e50;
            --text-light: #7f8c8d;
            --text-white: #ffffff;
            --border: #e0e4e8;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 20px rgba(0,0,0,0.08);
            --shadow-hover: 0 12px 40px rgba(0,0,0,0.15);
            --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
            --max-width: 1200px;
            --nav-height: 70px;
        }

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

        html { scroll-behavior: smooth; }

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            color: var(--text-main);
            background: var(--bg-light);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--accent); }
        ul, ol { list-style: none; }
        button, input, textarea { font-family: inherit; }

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

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(0,0,0,0.04);
            box-shadow: 0 2px 20px rgba(0,0,0,0.04);
            height: var(--nav-height);
            display: flex;
            align-items: center;
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        .logo {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary-dark);
            display: flex;
            align-items: center;
            gap: 10px;
            letter-spacing: -0.5px;
        }
        .logo i { color: var(--accent); font-size: 1.4rem; }
        .logo:hover { color: var(--primary); }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-links a {
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-main);
            transition: var(--transition);
            position: relative;
        }
        .nav-links a:hover {
            background: rgba(26,58,92,0.08);
            color: var(--primary);
        }
        .nav-links a.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(26,58,92,0.25);
        }

        .menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--primary-dark);
            cursor: pointer;
            padding: 6px 10px;
            border-radius: 8px;
            transition: var(--transition);
        }
        .menu-toggle:hover { background: rgba(0,0,0,0.05); }

        /* ===== Article Banner ===== */
        .article-banner {
            margin-top: var(--nav-height);
            padding: 80px 0 60px;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
            position: relative;
            overflow: hidden;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.12;
            mix-blend-mode: overlay;
        }
        .article-banner .container { position: relative; z-index: 2; }

        .article-breadcrumb {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.9rem;
            color: rgba(255,255,255,0.7);
            margin-bottom: 20px;
        }
        .article-breadcrumb a { color: rgba(255,255,255,0.7); }
        .article-breadcrumb a:hover { color: #fff; }
        .article-breadcrumb span { color: rgba(255,255,255,0.5); }

        .article-banner h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.25;
            max-width: 900px;
            text-shadow: 0 2px 20px rgba(0,0,0,0.2);
            margin-bottom: 16px;
        }

        .article-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
            color: rgba(255,255,255,0.8);
            font-size: 0.95rem;
        }
        .article-meta .meta-item {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-meta .meta-item i { color: var(--accent-light); }
        .article-category-badge {
            display: inline-block;
            padding: 4px 16px;
            border-radius: 50px;
            background: var(--accent);
            color: #fff;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.3px;
        }

        /* ===== Article Content ===== */
        .article-section {
            padding: 60px 0 80px;
        }

        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 50px;
        }

        .article-main {
            background: #fff;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 40px 44px;
        }

        .article-body {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--text-main);
        }
        .article-body p { margin-bottom: 1.4em; }
        .article-body h2, .article-body h3 {
            margin-top: 1.6em;
            margin-bottom: 0.6em;
            color: var(--primary-dark);
            font-weight: 700;
        }
        .article-body h2 { font-size: 1.6rem; }
        .article-body h3 { font-size: 1.25rem; }
        .article-body ul, .article-body ol { margin-bottom: 1.4em; padding-left: 1.6em; }
        .article-body li { margin-bottom: 0.5em; list-style: disc; }
        .article-body ol li { list-style: decimal; }
        .article-body img { border-radius: var(--radius-sm); margin: 1.5em 0; box-shadow: var(--shadow); }
        .article-body blockquote {
            border-left: 4px solid var(--accent);
            padding: 16px 24px;
            background: rgba(230,126,34,0.06);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 1.4em 0;
            font-style: italic;
            color: var(--text-main);
        }
        .article-body a { color: var(--accent); text-decoration: underline; }
        .article-body a:hover { color: var(--accent-dark); }

        .article-not-found {
            text-align: center;
            padding: 80px 20px;
        }
        .article-not-found i { font-size: 4rem; color: var(--text-light); margin-bottom: 20px; }
        .article-not-found h2 { font-size: 1.8rem; color: var(--primary-dark); margin-bottom: 12px; }
        .article-not-found p { color: var(--text-light); margin-bottom: 24px; }
        .article-not-found .btn-home {
            display: inline-block;
            padding: 12px 36px;
            background: var(--primary);
            color: #fff;
            border-radius: 50px;
            font-weight: 600;
            transition: var(--transition);
        }
        .article-not-found .btn-home:hover { background: var(--primary-light); transform: translateY(-2px); box-shadow: var(--shadow-hover); }

        /* ===== Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 30px;
        }

        .sidebar-card {
            background: #fff;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 28px 24px;
        }
        .sidebar-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--border);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card h3 i { color: var(--accent); }

        .sidebar-list li {
            padding: 10px 0;
            border-bottom: 1px solid var(--border);
        }
        .sidebar-list li:last-child { border-bottom: none; }
        .sidebar-list a {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            color: var(--text-main);
            font-size: 0.95rem;
            line-height: 1.4;
        }
        .sidebar-list a:hover { color: var(--accent); }
        .sidebar-list .list-icon { color: var(--accent); font-size: 0.8rem; margin-top: 4px; }

        .sidebar-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .sidebar-tags a {
            padding: 5px 14px;
            border-radius: 50px;
            background: rgba(26,58,92,0.06);
            color: var(--text-main);
            font-size: 0.85rem;
            transition: var(--transition);
        }
        .sidebar-tags a:hover { background: var(--primary); color: #fff; }

        .sidebar-cta {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            color: #fff;
            text-align: center;
            padding: 32px 24px;
        }
        .sidebar-cta h3 { color: #fff; border-bottom-color: rgba(255,255,255,0.2); }
        .sidebar-cta p { font-size: 0.95rem; opacity: 0.85; margin-bottom: 20px; }
        .sidebar-cta .btn-cta {
            display: inline-block;
            padding: 12px 32px;
            background: var(--accent);
            color: #fff;
            border-radius: 50px;
            font-weight: 600;
            transition: var(--transition);
        }
        .sidebar-cta .btn-cta:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(230,126,34,0.3); }

        /* ===== Related Posts ===== */
        .related-section {
            background: #fff;
            padding: 60px 0;
            border-top: 1px solid var(--border);
        }
        .related-section h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary-dark);
            text-align: center;
            margin-bottom: 40px;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .related-card {
            background: var(--bg-light);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
        .related-card img { width: 100%; height: 180px; object-fit: cover; border-radius: 0; }
        .related-card-body { padding: 20px 22px; }
        .related-card-body h3 { font-size: 1.05rem; font-weight: 600; color: var(--primary-dark); margin-bottom: 8px; }
        .related-card-body p { font-size: 0.9rem; color: var(--text-light); margin-bottom: 12px; }
        .related-card-body .read-more {
            font-size: 0.9rem; font-weight: 600; color: var(--accent);
        }
        .related-card-body .read-more:hover { color: var(--accent-dark); }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.85);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1.5fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo { color: #fff; margin-bottom: 16px; }
        .footer-brand .logo i { color: var(--accent); }
        .footer-brand p { font-size: 0.95rem; opacity: 0.7; line-height: 1.7; max-width: 360px; }
        .footer-col h4 {
            color: #fff;
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: 16px;
            position: relative;
            padding-bottom: 10px;
        }
        .footer-col h4::after { content: ''; position: absolute; bottom: 0; left: 0; width: 30px; height: 2px; background: var(--accent); }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a { color: rgba(255,255,255,0.7); font-size: 0.9rem; display: flex; align-items: center; gap: 8px; }
        .footer-col ul li a:hover { color: var(--accent-light); }
        .footer-col ul li a i { width: 18px; color: var(--accent); }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 0.85rem;
            opacity: 0.6;
        }
        .footer-social { display: flex; gap: 14px; }
        .footer-social a { color: rgba(255,255,255,0.6); font-size: 1.2rem; transition: var(--transition); }
        .footer-social a:hover { color: var(--accent-light); transform: translateY(-2px); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-layout { grid-template-columns: 1fr; gap: 40px; }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
        }

        @media (max-width: 768px) {
            .site-header { height: 64px; }
            .header-inner { padding: 0 16px; }
            .logo { font-size: 1.25rem; }
            .nav-links { display: none; gap: 4px; }
            .nav-links.open { display: flex; flex-direction: column; position: absolute; top: 64px; left: 0; width: 100%; background: rgba(255,255,255,0.98); backdrop-filter: blur(18px); padding: 16px 20px; box-shadow: 0 8px 30px rgba(0,0,0,0.1); border-radius: 0 0 var(--radius) var(--radius); }
            .nav-links a { padding: 10px 16px; font-size: 1rem; width: 100%; }
            .menu-toggle { display: block; }

            .article-banner { padding: 60px 0 40px; }
            .article-banner h1 { font-size: 1.8rem; }
            .article-meta { gap: 12px; font-size: 0.85rem; }
            .article-main { padding: 24px 20px; }
            .article-body { font-size: 1rem; }

            .related-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 30px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }

        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .article-banner h1 { font-size: 1.4rem; }
            .article-main { padding: 16px 14px; }
            .sidebar-card { padding: 20px 16px; }
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a3a5c;
            --primary-light: #2a5a8c;
            --primary-dark: #0d1f33;
            --accent: #e8a838;
            --accent-light: #f0c060;
            --accent-dark: #c88a20;
            --bg-light: #f8f9fb;
            --bg-dark: #0d1f33;
            --text-dark: #1a2a3a;
            --text-body: #3a4a5a;
            --text-light: #7a8a9a;
            --text-white: #ffffff;
            --border-color: #e2e6ed;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(26, 58, 92, 0.06);
            --shadow-md: 0 6px 24px rgba(26, 58, 92, 0.1);
            --shadow-lg: 0 16px 48px rgba(26, 58, 92, 0.14);
            --shadow-accent: 0 6px 24px rgba(232, 168, 56, 0.3);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --spacing-section: 5rem;
            --spacing-block: 2.5rem;
            --container-max: 1200px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; font-size: 16px; }
        body {
            font-family: var(--font-sans);
            color: var(--text-body);
            background: var(--bg-light);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--accent); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        ul { list-style: none; padding: 0; margin: 0; }
        h1, h2, h3, h4, h5, h6 { color: var(--text-dark); font-weight: 700; line-height: 1.3; letter-spacing: -0.02em; }
        h1 { font-size: 2.8rem; }
        h2 { font-size: 2.2rem; margin-bottom: 1rem; }
        h3 { font-size: 1.5rem; margin-bottom: 0.75rem; }
        h4 { font-size: 1.2rem; margin-bottom: 0.5rem; }
        p { margin-bottom: 1rem; color: var(--text-body); }
        .container { max-width: var(--container-max); margin: 0 auto; padding: 0 1.5rem; }
        .section-padding { padding: var(--spacing-section) 0; }
        .section-title {
            text-align: center;
            margin-bottom: 3rem;
        }
        .section-title h2 { position: relative; display: inline-block; }
        .section-title h2::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: var(--accent);
            border-radius: 4px;
            margin: 0.75rem auto 0;
        }
        .section-title p { font-size: 1.1rem; color: var(--text-light); max-width: 600px; margin: 0.5rem auto 0; }
        .text-center { text-align: center; }
        .text-accent { color: var(--accent); }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.85rem 2rem;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            font-family: var(--font-sans);
            text-decoration: none;
            line-height: 1.2;
        }
        .btn-primary {
            background: var(--accent);
            color: var(--text-dark);
            box-shadow: var(--shadow-accent);
        }
        .btn-primary:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: 0 10px 32px rgba(232, 168, 56, 0.35);
            color: var(--text-dark);
        }
        .btn-outline {
            background: transparent;
            color: var(--text-white);
            border: 2px solid var(--text-white);
        }
        .btn-outline:hover {
            background: var(--text-white);
            color: var(--primary);
            transform: translateY(-2px);
        }
        .btn-dark {
            background: var(--primary);
            color: var(--text-white);
        }
        .btn-dark:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
            color: var(--text-white);
        }
        .btn-sm { padding: 0.55rem 1.25rem; font-size: 0.85rem; }

        /* ===== Navigation (悬浮胶囊导航) ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            padding: 1rem 0;
            transition: var(--transition);
        }
        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            box-shadow: 0 2px 32px rgba(26, 58, 92, 0.1);
            padding: 0.5rem 0;
            border-radius: 0 0 var(--radius-lg) var(--radius-lg);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            background: rgba(255, 255, 255, 0.88);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-radius: 60px;
            padding: 0.55rem 1.5rem 0.55rem 2rem;
            box-shadow: 0 4px 24px rgba(26, 58, 92, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.5);
        }
        .logo {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 0.5rem;
            text-decoration: none;
        }
        .logo i { color: var(--accent); font-size: 1.4rem; }
        .logo:hover { color: var(--primary); }
        .nav-links { display: flex; align-items: center; gap: 0.25rem; flex-wrap: wrap; }
        .nav-links a {
            padding: 0.5rem 1.2rem;
            border-radius: 40px;
            font-weight: 500;
            font-size: 0.9rem;
            color: var(--text-body);
            transition: var(--transition);
            text-decoration: none;
            white-space: nowrap;
        }
        .nav-links a:hover { background: rgba(26, 58, 92, 0.06); color: var(--primary); }
        .nav-links a.active {
            background: var(--primary);
            color: var(--text-white);
            box-shadow: 0 4px 16px rgba(26, 58, 92, 0.2);
        }
        .nav-links a.active:hover { background: var(--primary-light); color: var(--text-white); }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--primary);
            cursor: pointer;
            padding: 0.25rem;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .hamburger:hover { background: rgba(26, 58, 92, 0.06); }

        /* ===== Hero / Banner ===== */
        .category-banner {
            position: relative;
            padding: 9rem 0 5rem;
            background: var(--bg-dark);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center center;
            background-attachment: fixed;
            overflow: hidden;
        }
        .category-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(13, 31, 51, 0.82) 0%, rgba(26, 58, 92, 0.65) 100%);
            z-index: 1;
        }
        .category-banner .container { position: relative; z-index: 2; }
        .category-banner h1 {
            color: var(--text-white);
            font-size: 3.2rem;
            font-weight: 800;
            margin-bottom: 0.75rem;
            letter-spacing: -0.03em;
        }
        .category-banner h1 i { color: var(--accent); margin-right: 0.5rem; }
        .category-banner p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 1.2rem;
            max-width: 650px;
            margin-bottom: 2rem;
            line-height: 1.8;
        }
        .banner-tags { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-top: 1rem; }
        .banner-tags .tag {
            display: inline-block;
            padding: 0.35rem 1rem;
            border-radius: 40px;
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(4px);
            color: var(--text-white);
            font-size: 0.85rem;
            font-weight: 500;
            border: 1px solid rgba(255, 255, 255, 0.2);
        }

        /* ===== Card Base ===== */
        .card {
            background: var(--text-white);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
        }
        .card-img {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 10;
            background: var(--border-color);
        }
        .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .card:hover .card-img img { transform: scale(1.05); }
        .card-img .badge {
            position: absolute;
            top: 1rem;
            left: 1rem;
            background: var(--accent);
            color: var(--text-dark);
            padding: 0.25rem 0.85rem;
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 700;
            box-shadow: 0 2px 8px rgba(0,0,0,0.15);
        }
        .card-body { padding: 1.5rem; flex: 1; display: flex; flex-direction: column; }
        .card-body h3 { font-size: 1.2rem; margin-bottom: 0.5rem; }
        .card-body h3 a { color: var(--text-dark); text-decoration: none; }
        .card-body h3 a:hover { color: var(--primary); }
        .card-body p { font-size: 0.95rem; color: var(--text-light); flex: 1; margin-bottom: 1rem; }
        .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.85rem;
            color: var(--text-light);
            border-top: 1px solid var(--border-color);
            padding-top: 0.85rem;
            margin-top: auto;
        }
        .card-meta i { margin-right: 0.3rem; }

        /* ===== Category Grid (4大分类) ===== */
        .cat-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
        }
        .cat-card {
            background: var(--text-white);
            border-radius: var(--radius);
            padding: 2rem 1.5rem;
            text-align: center;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid var(--border-color);
            text-decoration: none;
            display: block;
        }
        .cat-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--accent);
        }
        .cat-card .icon {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: rgba(26, 58, 92, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1rem;
            font-size: 1.6rem;
            color: var(--primary);
            transition: var(--transition);
        }
        .cat-card:hover .icon { background: var(--accent); color: var(--text-dark); }
        .cat-card h4 { color: var(--text-dark); margin-bottom: 0.4rem; }
        .cat-card p { font-size: 0.9rem; color: var(--text-light); margin-bottom: 0; }

        /* ===== Featured Items (推荐装备) ===== */
        .featured-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.8rem;
        }

        /* ===== Tips Section (选购技巧) ===== */
        .tips-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
        }
        .tip-item {
            display: flex;
            gap: 1.2rem;
            align-items: flex-start;
            background: var(--text-white);
            padding: 1.5rem;
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .tip-item:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
        .tip-num {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--accent);
            color: var(--text-dark);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.1rem;
        }
        .tip-item h4 { margin-bottom: 0.3rem; font-size: 1.05rem; }
        .tip-item p { font-size: 0.9rem; color: var(--text-light); margin-bottom: 0; }

        /* ===== Maintenance Section (保养知识) ===== */
        .maintenance-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1.8rem;
        }
        .maintenance-card {
            display: flex;
            gap: 1.2rem;
            background: var(--text-white);
            padding: 1.5rem;
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            align-items: center;
        }
        .maintenance-card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
        .maintenance-card .icon {
            flex-shrink: 0;
            width: 52px;
            height: 52px;
            border-radius: var(--radius-sm);
            background: rgba(26, 58, 92, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--primary);
        }
        .maintenance-card h4 { margin-bottom: 0.25rem; font-size: 1.05rem; }
        .maintenance-card p { font-size: 0.9rem; color: var(--text-light); margin-bottom: 0; }

        /* ===== FAQ ===== */
        .faq-list { max-width: 800px; margin: 0 auto; }
        .faq-item {
            background: var(--text-white);
            border-radius: var(--radius);
            margin-bottom: 1rem;
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { box-shadow: var(--shadow-md); }
        .faq-question {
            padding: 1.3rem 1.8rem;
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--text-dark);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: var(--text-white);
            border: none;
            width: 100%;
            text-align: left;
            font-family: var(--font-sans);
            transition: var(--transition);
        }
        .faq-question:hover { background: rgba(26, 58, 92, 0.03); }
        .faq-question i { transition: var(--transition); color: var(--accent); font-size: 1.1rem; }
        .faq-item.active .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            padding: 0 1.8rem 1.3rem;
            font-size: 0.95rem;
            color: var(--text-light);
            display: none;
            line-height: 1.8;
        }
        .faq-item.active .faq-answer { display: block; }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--bg-dark);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            position: relative;
            padding: 5rem 0;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(13, 31, 51, 0.85) 0%, rgba(26, 58, 92, 0.7) 100%);
            z-index: 1;
        }
        .cta-section .container { position: relative; z-index: 2; text-align: center; }
        .cta-section h2 { color: var(--text-white); font-size: 2.4rem; margin-bottom: 1rem; }
        .cta-section p { color: rgba(255, 255, 255, 0.8); font-size: 1.1rem; margin-bottom: 2rem; max-width: 600px; margin-left: auto; margin-right: auto; }
        .cta-buttons { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 4rem 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1.5fr;
            gap: 3rem;
            padding-bottom: 2.5rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand .logo { color: var(--text-white); font-size: 1.4rem; margin-bottom: 1rem; display: inline-flex; }
        .footer-brand .logo i { color: var(--accent); }
        .footer-brand p { color: rgba(255, 255, 255, 0.6); font-size: 0.95rem; max-width: 360px; }
        .footer-col h4 { color: var(--text-white); font-size: 1rem; margin-bottom: 1.2rem; font-weight: 600; }
        .footer-col ul li { margin-bottom: 0.7rem; }
        .footer-col ul li a { color: rgba(255, 255, 255, 0.6); font-size: 0.9rem; text-decoration: none; transition: var(--transition); display: flex; align-items: center; gap: 0.5rem; }
        .footer-col ul li a:hover { color: var(--accent); }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1.5rem 0;
            flex-wrap: wrap;
            gap: 1rem;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-social { display: flex; gap: 0.75rem; }
        .footer-social a {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.6);
            font-size: 1rem;
            transition: var(--transition);
        }
        .footer-social a:hover { background: var(--accent); color: var(--text-dark); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .cat-grid { grid-template-columns: repeat(2, 1fr); }
            .featured-grid { grid-template-columns: repeat(2, 1fr); }
            .tips-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
        }
        @media (max-width: 768px) {
            :root { --spacing-section: 3.5rem; }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            .category-banner { padding: 7rem 0 3.5rem; }
            .category-banner h1 { font-size: 2.2rem; }
            .category-banner p { font-size: 1rem; }
            .header-inner { padding: 0.4rem 1rem; border-radius: 40px; }
            .nav-links { display: none; flex-direction: column; width: 100%; padding: 0.75rem 0 0.5rem; gap: 0.2rem; }
            .nav-links.open { display: flex; }
            .nav-links a { padding: 0.5rem 1rem; width: 100%; text-align: center; }
            .hamburger { display: block; }
            .cat-grid { grid-template-columns: repeat(2, 1fr); gap: 1rem; }
            .featured-grid { grid-template-columns: 1fr; }
            .tips-grid { grid-template-columns: 1fr; }
            .maintenance-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; text-align: center; }
            .footer-brand p { max-width: 100%; }
            .footer-col ul li a { justify-content: center; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .cta-section h2 { font-size: 1.8rem; }
            .banner-tags { justify-content: center; }
            .category-banner h1, .category-banner p { text-align: center; margin-left: auto; margin-right: auto; }
            .section-title h2 { font-size: 1.6rem; }
        }
        @media (max-width: 520px) {
            .cat-grid { grid-template-columns: 1fr; }
            .header-inner { border-radius: 30px; }
            .logo { font-size: 1.2rem; }
            .btn { padding: 0.7rem 1.5rem; font-size: 0.9rem; }
            .card-body { padding: 1.2rem; }
            .faq-question { padding: 1rem 1.2rem; font-size: 0.95rem; }
            .faq-answer { padding: 0 1.2rem 1rem; }
        }

        /* ===== Utility ===== */
        .mt-2 { margin-top: 2rem; }
        .mb-2 { margin-bottom: 2rem; }
        .gap-1 { gap: 1rem; }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .bg-white { background: var(--text-white); }
        .bg-light { background: var(--bg-light); }
        .rounded-full { border-radius: 50px; }
        .text-small { font-size: 0.9rem; color: var(--text-light); }