/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --clr-primary: #0c1e3a;
            --clr-primary-light: #1a2f52;
            --clr-primary-lighter: #2a4a7a;
            --clr-accent: #2563eb;
            --clr-accent-hover: #1d4ed8;
            --clr-accent-light: #dbeafe;
            --clr-gold: #f59e0b;
            --clr-gold-light: #fef3c7;
            --clr-bg: #ffffff;
            --clr-bg-alt: #f8fafc;
            --clr-bg-card: #ffffff;
            --clr-text: #0f172a;
            --clr-text-body: #1e293b;
            --clr-text-muted: #64748b;
            --clr-text-light: #94a3b8;
            --clr-border: #e2e8f0;
            --clr-border-light: #f1f5f9;
            --clr-success: #10b981;
            --clr-warning: #f59e0b;
            --clr-danger: #ef4444;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 20px rgba(0,0,0,0.06);
            --shadow-lg: 0 10px 40px rgba(0,0,0,0.08);
            --shadow-xl: 0 20px 60px rgba(0,0,0,0.10);
            --space-xs: 4px;
            --space-sm: 8px;
            --space-md: 16px;
            --space-lg: 24px;
            --space-xl: 32px;
            --space-2xl: 48px;
            --space-3xl: 64px;
            --space-4xl: 80px;
            --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
            --font-mono: "SF Mono", Monaco, "Cascadia Code", monospace;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
        }

        /* ===== 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(--clr-text-body);
            background: var(--clr-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--clr-accent); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--clr-accent-hover); }
        a:focus-visible { outline: 2px solid var(--clr-accent); outline-offset: 2px; border-radius: var(--radius-sm); }
        button, input, textarea, select { font-family: inherit; font-size: inherit; }
        button { cursor: pointer; border: none; background: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; color: var(--clr-text); font-weight: 700; }
        h1 { font-size: clamp(2rem, 5vw, 3.2rem); }
        h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); }
        h3 { font-size: clamp(1.2rem, 2.5vw, 1.6rem); }
        h4 { font-size: 1.2rem; }
        p { margin-bottom: 1em; }
        p:last-child { margin-bottom: 0; }

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

        /* ===== Utility ===== */
        .section-title {
            text-align: center;
            margin-bottom: var(--space-2xl);
        }
        .section-title h2 {
            margin-bottom: var(--space-sm);
        }
        .section-title p {
            color: var(--clr-text-muted);
            max-width: 600px;
            margin: 0 auto;
            font-size: 1.05rem;
        }
        .text-center { text-align: center; }
        .mt-1 { margin-top: var(--space-lg); }
        .mt-2 { margin-top: var(--space-2xl); }
        .mb-1 { margin-bottom: var(--space-lg); }
        .mb-2 { margin-bottom: var(--space-2xl); }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: var(--space-sm);
            padding: 12px 28px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 1rem;
            transition: all var(--transition);
            border: 2px solid transparent;
            line-height: 1.4;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--clr-accent);
            color: #fff;
            border-color: var(--clr-accent);
        }
        .btn-primary:hover {
            background: var(--clr-accent-hover);
            border-color: var(--clr-accent-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(37,99,235,0.30);
        }
        .btn-primary:active { transform: translateY(0); box-shadow: 0 2px 8px rgba(37,99,235,0.25); }
        .btn-outline {
            background: transparent;
            color: var(--clr-primary);
            border-color: var(--clr-border);
        }
        .btn-outline:hover {
            background: var(--clr-bg-alt);
            border-color: var(--clr-accent);
            color: var(--clr-accent);
            transform: translateY(-2px);
        }
        .btn-gold {
            background: var(--clr-gold);
            color: #1a1a1a;
            border-color: var(--clr-gold);
        }
        .btn-gold:hover {
            background: #d97706;
            border-color: #d97706;
            color: #1a1a1a;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(245,158,11,0.30);
        }
        .btn-lg { padding: 16px 36px; font-size: 1.1rem; }
        .btn-sm { padding: 8px 18px; font-size: 0.875rem; }
        .btn i { font-size: 1.1em; }

        /* ===== Badge / Tag ===== */
        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            background: var(--clr-accent-light);
            color: var(--clr-accent);
        }
        .badge-gold {
            background: var(--clr-gold-light);
            color: #92400e;
        }
        .badge-success {
            background: #d1fae5;
            color: #065f46;
        }

        /* ===== Header & Navigation ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--clr-border-light);
            box-shadow: 0 1px 8px rgba(0,0,0,0.04);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--space-lg);
        }
        .logo {
            display: flex;
            align-items: center;
            gap: var(--space-sm);
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--clr-primary);
            letter-spacing: -0.3px;
        }
        .logo i {
            color: var(--clr-accent);
            font-size: 1.6rem;
        }
        .logo:hover { color: var(--clr-primary); }
        .logo span { background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

        .main-nav { display: flex; align-items: center; gap: var(--space-xl); }
        .main-nav a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--clr-text-body);
            padding: 6px 0;
            position: relative;
            transition: color var(--transition);
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--clr-accent);
            transition: width var(--transition);
            border-radius: 2px;
        }
        .main-nav a:hover { color: var(--clr-accent); }
        .main-nav a:hover::after { width: 100%; }
        .main-nav a.active { color: var(--clr-accent); }
        .main-nav a.active::after { width: 100%; }
        .main-nav .nav-cta {
            padding: 8px 22px;
            background: var(--clr-accent);
            color: #fff !important;
            border-radius: var(--radius-md);
            font-weight: 600;
            border: none;
        }
        .main-nav .nav-cta::after { display: none; }
        .main-nav .nav-cta:hover {
            background: var(--clr-accent-hover);
            transform: translateY(-1px);
            box-shadow: 0 4px 16px rgba(37,99,235,0.25);
        }

        /* Mega dropdown */
        .nav-item-wrap { position: relative; }
        .mega-dropdown {
            position: absolute;
            top: 100%;
            left: 50%;
            transform: translateX(-50%) translateY(8px);
            background: #fff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-xl);
            padding: var(--space-lg);
            min-width: 420px;
            opacity: 0;
            visibility: hidden;
            pointer-events: none;
            transition: all var(--transition);
            border: 1px solid var(--clr-border-light);
            margin-top: 8px;
        }
        .nav-item-wrap:hover .mega-dropdown {
            opacity: 1;
            visibility: visible;
            pointer-events: auto;
            transform: translateX(-50%) translateY(0);
        }
        .mega-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-md); }
        .mega-card {
            display: flex;
            align-items: center;
            gap: var(--space-md);
            padding: var(--space-md);
            border-radius: var(--radius-md);
            transition: background var(--transition);
            background: var(--clr-bg-alt);
        }
        .mega-card:hover { background: var(--clr-accent-light); }
        .mega-card i { font-size: 1.4rem; color: var(--clr-accent); width: 40px; text-align: center; }
        .mega-card h4 { font-size: 0.95rem; font-weight: 600; margin-bottom: 2px; }
        .mega-card p { font-size: 0.8rem; color: var(--clr-text-muted); margin: 0; }

        /* Hamburger */
        .menu-toggle { display: none; font-size: 1.5rem; color: var(--clr-primary); padding: var(--space-sm); cursor: pointer; background: none; border: none; }

        @media (max-width: 900px) {
            .menu-toggle { display: block; }
            .main-nav {
                position: fixed;
                top: 70px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                padding: var(--space-lg);
                gap: var(--space-md);
                box-shadow: var(--shadow-lg);
                transform: translateY(-120%);
                opacity: 0;
                transition: all var(--transition);
                border-bottom: 2px solid var(--clr-border-light);
                z-index: 999;
                align-items: stretch;
            }
            .main-nav.open {
                transform: translateY(0);
                opacity: 1;
            }
            .main-nav a { padding: 10px 0; border-bottom: 1px solid var(--clr-border-light); }
            .main-nav a:last-child { border-bottom: none; }
            .main-nav a::after { display: none; }
            .main-nav .nav-cta { text-align: center; }
            .mega-dropdown { display: none; }
            .nav-item-wrap:hover .mega-dropdown { display: none; }
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 85vh;
            display: flex;
            align-items: center;
            background: var(--clr-primary);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(12,30,58,0.88) 0%, rgba(12,30,58,0.70) 60%, rgba(37,99,235,0.30) 100%);
            z-index: 1;
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 120px;
            background: linear-gradient(to top, var(--clr-bg), transparent);
            z-index: 2;
        }
        .hero-content {
            position: relative;
            z-index: 3;
            max-width: 720px;
            padding: var(--space-4xl) 0;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255,255,255,0.12);
            backdrop-filter: blur(6px);
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.9);
            margin-bottom: var(--space-lg);
            border: 1px solid rgba(255,255,255,0.15);
        }
        .hero-badge i { color: var(--clr-gold); }
        .hero h1 {
            color: #fff;
            font-size: clamp(2.2rem, 5.5vw, 3.6rem);
            line-height: 1.2;
            margin-bottom: var(--space-md);
            text-shadow: 0 2px 20px rgba(0,0,0,0.2);
        }
        .hero h1 span {
            background: linear-gradient(135deg, #60a5fa, #a78bfa);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero p {
            color: rgba(255,255,255,0.8);
            font-size: 1.15rem;
            max-width: 580px;
            margin-bottom: var(--space-xl);
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: var(--space-md);
            align-items: center;
        }
        .hero-actions .btn-primary {
            background: var(--clr-accent);
            border-color: var(--clr-accent);
            box-shadow: 0 8px 32px rgba(37,99,235,0.35);
        }
        .hero-actions .btn-primary:hover { box-shadow: 0 12px 40px rgba(37,99,235,0.45); }
        .hero-actions .btn-outline {
            color: #fff;
            border-color: rgba(255,255,255,0.35);
        }
        .hero-actions .btn-outline:hover { border-color: #fff; background: rgba(255,255,255,0.08); color: #fff; }
        .hero-stats {
            display: flex;
            gap: var(--space-2xl);
            margin-top: var(--space-2xl);
            padding-top: var(--space-xl);
            border-top: 1px solid rgba(255,255,255,0.12);
        }
        .hero-stat h3 { color: #fff; font-size: 1.8rem; font-weight: 800; }
        .hero-stat h3 i { color: var(--clr-gold); font-size: 1.2rem; margin-right: 4px; }
        .hero-stat p { color: rgba(255,255,255,0.6); font-size: 0.9rem; margin: 0; }
        @media (max-width: 768px) {
            .hero { min-height: 70vh; }
            .hero-content { padding: var(--space-2xl) 0; }
            .hero-stats { flex-wrap: wrap; gap: var(--space-lg); }
            .hero-stat { flex: 1 1 40%; }
        }
        @media (max-width: 520px) {
            .hero-actions { flex-direction: column; align-items: stretch; }
            .hero-actions .btn { justify-content: center; }
            .hero-stats { flex-direction: column; gap: var(--space-md); }
        }

        /* ===== Section Spacing ===== */
        .section {
            padding: var(--space-4xl) 0;
        }
        .section-alt {
            background: var(--clr-bg-alt);
        }
        @media (max-width: 768px) {
            .section { padding: var(--space-2xl) 0; }
        }

        /* ===== Feature / Intro ===== */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--space-xl);
        }
        .feature-card {
            background: var(--clr-bg-card);
            border-radius: var(--radius-lg);
            padding: var(--space-xl);
            box-shadow: var(--shadow-md);
            border: 1px solid var(--clr-border-light);
            transition: all var(--transition);
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: var(--clr-accent-light);
        }
        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            margin-bottom: var(--space-md);
            color: #fff;
        }
        .feature-icon.blue { background: var(--clr-accent); }
        .feature-icon.gold { background: var(--clr-gold); }
        .feature-icon.green { background: var(--clr-success); }
        .feature-card h3 { margin-bottom: var(--space-sm); font-size: 1.2rem; }
        .feature-card p { color: var(--clr-text-muted); font-size: 0.95rem; margin: 0; }
        @media (max-width: 900px) {
            .feature-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 520px) {
            .feature-grid { grid-template-columns: 1fr; }
        }

        /* ===== Category / Service Cards ===== */
        .cat-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--space-xl);
        }
        .cat-card {
            background: var(--clr-bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--clr-border-light);
            transition: all var(--transition);
        }
        .cat-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }
        .cat-card-img {
            height: 200px;
            background-size: cover;
            background-position: center;
            position: relative;
        }
        .cat-card-img .badge {
            position: absolute;
            top: var(--space-md);
            left: var(--space-md);
        }
        .cat-card-body {
            padding: var(--space-lg);
        }
        .cat-card-body h3 {
            font-size: 1.15rem;
            margin-bottom: var(--space-sm);
        }
        .cat-card-body p {
            color: var(--clr-text-muted);
            font-size: 0.9rem;
            margin-bottom: var(--space-md);
        }
        .cat-card-body .btn {
            font-size: 0.9rem;
            padding: 8px 20px;
        }
        @media (max-width: 900px) {
            .cat-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 520px) {
            .cat-grid { grid-template-columns: 1fr; }
        }

        /* ===== Process / Steps ===== */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--space-xl);
            counter-reset: step;
        }
        .process-step {
            text-align: center;
            position: relative;
        }
        .process-step::after {
            content: '';
            position: absolute;
            top: 32px;
            right: -20px;
            width: 40px;
            height: 2px;
            background: linear-gradient(to right, var(--clr-accent), transparent);
        }
        .process-step:last-child::after { display: none; }
        .step-num {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: var(--clr-accent-light);
            color: var(--clr-accent);
            font-size: 1.6rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto var(--space-md);
            transition: all var(--transition);
        }
        .process-step:hover .step-num {
            background: var(--clr-accent);
            color: #fff;
            transform: scale(1.08);
        }
        .process-step h4 { font-size: 1.05rem; margin-bottom: var(--space-xs); }
        .process-step p { color: var(--clr-text-muted); font-size: 0.9rem; margin: 0; }
        @media (max-width: 900px) {
            .process-grid { grid-template-columns: repeat(2, 1fr); }
            .process-step::after { display: none; }
        }
        @media (max-width: 520px) {
            .process-grid { grid-template-columns: 1fr; gap: var(--space-lg); }
        }

        /* ===== News / CMS List ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--space-xl);
        }
        .news-card {
            background: var(--clr-bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--clr-border-light);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .news-card-img {
            height: 180px;
            background-size: cover;
            background-position: center;
            flex-shrink: 0;
        }
        .news-card-body {
            padding: var(--space-lg);
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .news-card-body .meta {
            display: flex;
            align-items: center;
            gap: var(--space-md);
            font-size: 0.8rem;
            color: var(--clr-text-muted);
            margin-bottom: var(--space-sm);
        }
        .news-card-body .meta .badge { font-size: 0.7rem; padding: 2px 10px; }
        .news-card-body h3 {
            font-size: 1.05rem;
            margin-bottom: var(--space-sm);
            flex: 1;
        }
        .news-card-body h3 a {
            color: var(--clr-text);
            transition: color var(--transition);
        }
        .news-card-body h3 a:hover { color: var(--clr-accent); }
        .news-card-body p {
            color: var(--clr-text-muted);
            font-size: 0.9rem;
            margin-bottom: var(--space-md);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card-body .read-more {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--clr-accent);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            margin-top: auto;
        }
        .news-card-body .read-more:hover { gap: 8px; }
        .empty-news {
            grid-column: 1 / -1;
            text-align: center;
            padding: var(--space-2xl);
            color: var(--clr-text-muted);
            background: var(--clr-bg-alt);
            border-radius: var(--radius-lg);
            border: 1px dashed var(--clr-border);
        }
        .empty-news i { font-size: 2rem; margin-bottom: var(--space-md); color: var(--clr-text-light); }
        @media (max-width: 900px) {
            .news-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 520px) {
            .news-grid { grid-template-columns: 1fr; }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
        }
        .faq-item {
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-md);
            margin-bottom: var(--space-md);
            overflow: hidden;
            transition: border-color var(--transition);
        }
        .faq-item:hover { border-color: var(--clr-accent-light); }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: var(--space-lg);
            font-weight: 600;
            font-size: 1rem;
            color: var(--clr-text);
            cursor: pointer;
            background: var(--clr-bg-card);
            transition: background var(--transition);
            gap: var(--space-md);
        }
        .faq-question:hover { background: var(--clr-bg-alt); }
        .faq-question i {
            color: var(--clr-accent);
            font-size: 1.1rem;
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.active .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            padding: 0 var(--space-lg) var(--space-lg);
            color: var(--clr-text-muted);
            font-size: 0.95rem;
            line-height: 1.8;
            display: none;
        }
        .faq-item.active .faq-answer { display: block; }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--clr-primary);
            position: relative;
            overflow: hidden;
            padding: var(--space-4xl) 0;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(circle at 30% 50%, rgba(37,99,235,0.20) 0%, transparent 60%);
        }
        .cta-section .container { position: relative; z-index: 2; }
        .cta-box {
            text-align: center;
            max-width: 640px;
            margin: 0 auto;
        }
        .cta-box h2 { color: #fff; margin-bottom: var(--space-md); }
        .cta-box p { color: rgba(255,255,255,0.7); font-size: 1.05rem; margin-bottom: var(--space-xl); }
        .cta-box .btn-primary {
            background: var(--clr-gold);
            border-color: var(--clr-gold);
            color: #1a1a1a;
            font-weight: 700;
            box-shadow: 0 8px 32px rgba(245,158,11,0.30);
        }
        .cta-box .btn-primary:hover {
            background: #d97706;
            border-color: #d97706;
            box-shadow: 0 12px 40px rgba(245,158,11,0.40);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--clr-primary);
            color: rgba(255,255,255,0.7);
            padding: var(--space-3xl) 0 var(--space-xl);
            border-top: 1px solid rgba(255,255,255,0.06);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: var(--space-2xl);
            margin-bottom: var(--space-2xl);
        }
        .footer-brand .logo { color: #fff; margin-bottom: var(--space-md); }
        .footer-brand .logo span { -webkit-text-fill-color: #fff; background: none; }
        .footer-brand p { font-size: 0.9rem; max-width: 280px; line-height: 1.8; }
        .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            margin-bottom: var(--space-md);
            font-weight: 600;
        }
        .footer-col ul li { margin-bottom: var(--space-sm); }
        .footer-col ul li a {
            color: rgba(255,255,255,0.6);
            font-size: 0.9rem;
            transition: color var(--transition);
        }
        .footer-col ul li a:hover { color: #fff; }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: var(--space-lg);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: var(--space-md);
            font-size: 0.85rem;
        }
        .footer-bottom a { color: rgba(255,255,255,0.6); }
        .footer-bottom a:hover { color: #fff; }
        @media (max-width: 900px) {
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .footer-brand { grid-column: 1 / -1; }
        }
        @media (max-width: 520px) {
            .footer-grid { grid-template-columns: 1fr; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }

        /* ===== Back to Top ===== */
        .back-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--clr-accent);
            color: #fff;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 20px rgba(37,99,235,0.30);
            opacity: 0;
            visibility: hidden;
            transform: translateY(20px);
            transition: all var(--transition);
            z-index: 999;
            border: none;
        }
        .back-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
        .back-top:hover { background: var(--clr-accent-hover); transform: translateY(-4px); box-shadow: 0 8px 28px rgba(37,99,235,0.40); }

        /* ===== Responsive Helpers ===== */
        @media (max-width: 768px) {
            .section-title p { font-size: 0.95rem; }
        }
        @media (max-width: 520px) {
            .hero h1 { font-size: 1.8rem; }
            .hero p { font-size: 1rem; }
            .btn-lg { padding: 14px 28px; font-size: 1rem; }
        }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a2a6c;
            --primary-light: #2d4a9e;
            --primary-dark: #0f1a42;
            --secondary: #e8b830;
            --secondary-light: #f0d060;
            --secondary-dark: #c99f20;
            --accent: #f5a623;
            --bg-light: #f8f9fc;
            --bg-white: #ffffff;
            --bg-dark: #0d152e;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-light: #7a7a9a;
            --text-white: #ffffff;
            --border-color: #e2e6f0;
            --border-radius: 12px;
            --border-radius-sm: 8px;
            --border-radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(26,42,108,0.06);
            --shadow-md: 0 6px 24px rgba(26,42,108,0.10);
            --shadow-lg: 0 16px 48px rgba(26,42,108,0.14);
            --shadow-xl: 0 24px 64px rgba(26,42,108,0.18);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --max-width: 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-family);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-light);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-light); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--border-radius-sm); }
        ul, ol { list-style: none; }
        button, input, textarea { font-family: inherit; font-size: inherit; outline: none; border: none; }
        button { cursor: pointer; background: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text-primary); }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .container-narrow {
            max-width: 860px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header & Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255,255,255,0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            height: var(--header-height);
            transition: var(--transition);
        }
        .site-header.scrolled { box-shadow: var(--shadow-md); }
        .header-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.3px;
            transition: var(--transition);
        }
        .logo i { color: var(--secondary); font-size: 1.5rem; }
        .logo:hover { color: var(--primary-light); transform: scale(1.01); }
        .logo span { background: linear-gradient(135deg, var(--primary), var(--primary-light)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

        .menu-toggle { display: none; font-size: 1.5rem; color: var(--primary); padding: 8px; border-radius: var(--border-radius-sm); transition: var(--transition); }
        .menu-toggle:hover { background: var(--bg-light); }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .main-nav > a {
            padding: 8px 18px;
            border-radius: var(--border-radius-sm);
            font-weight: 500;
            color: var(--text-secondary);
            font-size: 0.95rem;
            transition: var(--transition);
            position: relative;
        }
        .main-nav > a:hover { color: var(--primary); background: rgba(26,42,108,0.06); }
        .main-nav > a.active { color: var(--primary); background: rgba(26,42,108,0.08); font-weight: 600; }
        .main-nav > a.active::after { content: ''; position: absolute; bottom: 2px; left: 50%; transform: translateX(-50%); width: 20px; height: 3px; background: var(--secondary); border-radius: 4px; }

        .nav-item-wrap { position: relative; }
        .nav-item-wrap > a {
            padding: 8px 18px;
            border-radius: var(--border-radius-sm);
            font-weight: 500;
            color: var(--text-secondary);
            font-size: 0.95rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .nav-item-wrap > a:hover { color: var(--primary); background: rgba(26,42,108,0.06); }

        .mega-dropdown {
            position: absolute;
            top: calc(100% + 12px);
            left: 50%;
            transform: translateX(-50%) translateY(8px);
            background: var(--bg-white);
            border-radius: var(--border-radius);
            box-shadow: var(--shadow-lg);
            padding: 20px;
            min-width: 480px;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            border: 1px solid var(--border-color);
            z-index: 100;
        }
        .nav-item-wrap:hover .mega-dropdown { opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0); }
        .mega-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
        .mega-card {
            display: flex; align-items: flex-start; gap: 14px; padding: 14px 16px;
            border-radius: var(--border-radius-sm); transition: var(--transition);
            background: var(--bg-light); border: 1px solid transparent;
        }
        .mega-card:hover { background: var(--bg-white); border-color: var(--border-color); box-shadow: var(--shadow-sm); transform: translateY(-2px); }
        .mega-card i { font-size: 1.6rem; color: var(--primary); margin-top: 2px; flex-shrink: 0; }
        .mega-card h4 { font-size: 0.95rem; font-weight: 600; color: var(--text-primary); margin-bottom: 2px; }
        .mega-card p { font-size: 0.82rem; color: var(--text-light); line-height: 1.4; }

        .nav-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-light)) !important;
            color: var(--text-white) !important;
            padding: 10px 26px !important;
            border-radius: 50px !important;
            font-weight: 600 !important;
            box-shadow: 0 4px 14px rgba(26,42,108,0.25);
            transition: var(--transition) !important;
        }
        .nav-cta:hover { transform: translateY(-2px) !important; box-shadow: 0 8px 24px rgba(26,42,108,0.35) !important; background: linear-gradient(135deg, var(--primary-light), var(--primary)) !important; }

        /* ===== Page Banner ===== */
        .page-banner {
            margin-top: var(--header-height);
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
            padding: 80px 0 60px;
            position: relative;
            overflow: hidden;
            min-height: 240px;
            display: flex;
            align-items: center;
        }
        .page-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;
        }
        .page-banner::after {
            content: '';
            position: absolute;
            bottom: -40px; right: -40px;
            width: 300px; height: 300px;
            background: radial-gradient(circle, rgba(232,184,48,0.15) 0%, transparent 70%);
            border-radius: 50%;
        }
        .page-banner .container-narrow { position: relative; z-index: 2; text-align: center; }
        .page-banner h1 {
            font-size: 2.4rem;
            color: var(--text-white);
            margin-bottom: 12px;
            letter-spacing: -0.5px;
            text-shadow: 0 2px 12px rgba(0,0,0,0.15);
        }
        .page-banner .breadcrumb {
            display: flex; align-items: center; justify-content: center; gap: 10px;
            font-size: 0.9rem; color: rgba(255,255,255,0.7); flex-wrap: wrap;
        }
        .page-banner .breadcrumb a { color: rgba(255,255,255,0.8); }
        .page-banner .breadcrumb a:hover { color: var(--secondary); }
        .page-banner .breadcrumb i { font-size: 0.6rem; color: rgba(255,255,255,0.5); }
        .page-banner .meta-info {
            display: flex; align-items: center; justify-content: center; gap: 20px;
            margin-top: 16px; font-size: 0.88rem; color: rgba(255,255,255,0.75); flex-wrap: wrap;
        }
        .page-banner .meta-info i { margin-right: 5px; }
        .page-banner .meta-info .tag {
            background: rgba(232,184,48,0.2);
            color: var(--secondary-light);
            padding: 3px 14px;
            border-radius: 50px;
            font-size: 0.82rem;
            font-weight: 500;
        }

        /* ===== Article Main ===== */
        .article-main { padding: 60px 0 80px; }
        .article-body {
            background: var(--bg-white);
            border-radius: var(--border-radius-lg);
            box-shadow: var(--shadow-md);
            padding: 48px 56px;
            border: 1px solid var(--border-color);
        }
        .article-body .content {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--text-primary);
        }
        .article-body .content p { margin-bottom: 1.4em; }
        .article-body .content h2 { font-size: 1.5rem; margin: 1.8em 0 0.6em; color: var(--primary); }
        .article-body .content h3 { font-size: 1.2rem; margin: 1.4em 0 0.4em; color: var(--text-primary); }
        .article-body .content ul, .article-body .content ol { margin: 0.8em 0 1.2em 1.5em; list-style: disc; }
        .article-body .content li { margin-bottom: 0.4em; }
        .article-body .content blockquote {
            border-left: 4px solid var(--secondary);
            background: var(--bg-light);
            padding: 16px 24px;
            margin: 1.2em 0;
            border-radius: 0 var(--border-radius-sm) var(--border-radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-body .content img { border-radius: var(--border-radius); margin: 1.2em auto; box-shadow: var(--shadow-sm); }
        .article-body .content a { color: var(--primary-light); text-decoration: underline; }
        .article-body .content a:hover { color: var(--primary); }
        .article-body .content code {
            background: var(--bg-light);
            padding: 2px 10px;
            border-radius: 4px;
            font-size: 0.9em;
            border: 1px solid var(--border-color);
            font-family: 'Fira Code', monospace;
        }
        .article-body .content pre {
            background: var(--bg-dark);
            color: #e4e4f0;
            padding: 24px;
            border-radius: var(--border-radius);
            overflow-x: auto;
            margin: 1.2em 0;
            font-size: 0.9rem;
            line-height: 1.6;
        }
        .article-body .content pre code { background: none; border: none; color: inherit; padding: 0; }

        .article-meta-bottom {
            display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap;
            margin-top: 40px; padding-top: 28px; border-top: 1px solid var(--border-color);
            gap: 16px;
        }
        .article-meta-bottom .tags { display: flex; gap: 8px; flex-wrap: wrap; }
        .article-meta-bottom .tags span {
            background: var(--bg-light); color: var(--text-secondary);
            padding: 4px 16px; border-radius: 50px; font-size: 0.82rem;
            border: 1px solid var(--border-color); transition: var(--transition);
        }
        .article-meta-bottom .tags span:hover { background: var(--primary); color: white; border-color: var(--primary); }
        .article-meta-bottom .share { display: flex; align-items: center; gap: 10px; }
        .article-meta-bottom .share span { font-size: 0.88rem; color: var(--text-light); }
        .article-meta-bottom .share a {
            display: inline-flex; align-items: center; justify-content: center;
            width: 36px; height: 36px; border-radius: 50%;
            background: var(--bg-light); color: var(--text-secondary);
            transition: var(--transition); border: 1px solid var(--border-color);
        }
        .article-meta-bottom .share a:hover { background: var(--primary); color: white; border-color: var(--primary); transform: translateY(-2px); }

        .article-not-found {
            text-align: center; padding: 80px 20px;
        }
        .article-not-found i { font-size: 4rem; color: var(--text-light); margin-bottom: 20px; opacity: 0.5; }
        .article-not-found h2 { font-size: 1.8rem; color: var(--text-secondary); margin-bottom: 12px; }
        .article-not-found p { color: var(--text-light); margin-bottom: 24px; font-size: 1.05rem; }
        .article-not-found .btn {
            display: inline-flex; align-items: center; gap: 8px;
            background: var(--primary); color: white; padding: 12px 32px;
            border-radius: 50px; font-weight: 600; transition: var(--transition);
        }
        .article-not-found .btn:hover { background: var(--primary-light); transform: translateY(-2px); box-shadow: var(--shadow-md); }

        /* ===== Related Articles ===== */
        .related-section { padding: 60px 0 80px; background: var(--bg-light); }
        .related-section .section-title {
            text-align: center; margin-bottom: 40px;
        }
        .related-section .section-title h2 { font-size: 2rem; color: var(--primary); }
        .related-section .section-title p { color: var(--text-light); margin-top: 8px; font-size: 1.05rem; }
        .related-grid {
            display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
        }
        .related-card {
            background: var(--bg-white); border-radius: var(--border-radius);
            overflow: hidden; border: 1px solid var(--border-color);
            transition: var(--transition); box-shadow: var(--shadow-sm);
        }
        .related-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
        .related-card .card-img {
            height: 180px; background: var(--bg-light); overflow: hidden;
        }
        .related-card .card-img img { width: 100%; height: 100%; object-fit: cover; transition: var(--transition); }
        .related-card:hover .card-img img { transform: scale(1.05); }
        .related-card .card-body { padding: 20px 24px 24px; }
        .related-card .card-body h3 { font-size: 1.1rem; margin-bottom: 8px; }
        .related-card .card-body h3 a { color: var(--text-primary); }
        .related-card .card-body h3 a:hover { color: var(--primary); }
        .related-card .card-body p { font-size: 0.9rem; color: var(--text-light); line-height: 1.6; }
        .related-card .card-body .meta { display: flex; align-items: center; gap: 14px; margin-top: 12px; font-size: 0.82rem; color: var(--text-light); }
        .related-card .card-body .meta i { margin-right: 4px; }

        /* ===== CTA Section ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
            padding: 60px 0; text-align: center; position: relative; overflow: hidden;
        }
        .cta-section::before {
            content: ''; position: absolute; inset: 0;
            background: url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            opacity: 0.08; mix-blend-mode: overlay;
        }
        .cta-section .container { position: relative; z-index: 2; }
        .cta-section h2 { font-size: 2rem; color: var(--text-white); margin-bottom: 12px; }
        .cta-section p { font-size: 1.1rem; color: rgba(255,255,255,0.8); margin-bottom: 28px; max-width: 600px; margin-left: auto; margin-right: auto; }
        .cta-section .btn-group { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
        .cta-section .btn-primary {
            background: var(--secondary); color: var(--primary-dark); padding: 14px 36px;
            border-radius: 50px; font-weight: 700; font-size: 1.05rem;
            transition: var(--transition); box-shadow: 0 6px 20px rgba(232,184,48,0.35);
        }
        .cta-section .btn-primary:hover { background: var(--secondary-light); transform: translateY(-3px); box-shadow: 0 10px 32px rgba(232,184,48,0.45); color: var(--primary-dark); }
        .cta-section .btn-outline {
            border: 2px solid rgba(255,255,255,0.4); color: var(--text-white); padding: 14px 36px;
            border-radius: 50px; font-weight: 600; font-size: 1.05rem;
            transition: var(--transition); background: transparent;
        }
        .cta-section .btn-outline:hover { border-color: var(--secondary); color: var(--secondary); background: rgba(232,184,48,0.08); transform: translateY(-3px); }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.7);
            padding: 60px 0 32px;
        }
        .site-footer .logo { color: var(--text-white); margin-bottom: 16px; }
        .site-footer .logo span { -webkit-text-fill-color: var(--text-white); background: none; }
        .site-footer .logo i { color: var(--secondary); }
        .footer-grid { display: grid; grid-template-columns: 1.8fr 1fr 1fr 1.2fr; gap: 40px; margin-bottom: 40px; }
        .footer-brand p { font-size: 0.92rem; line-height: 1.7; color: rgba(255,255,255,0.55); max-width: 320px; }
        .footer-col h4 { color: var(--text-white); font-size: 1rem; font-weight: 600; margin-bottom: 16px; letter-spacing: 0.3px; }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a { color: rgba(255,255,255,0.55); font-size: 0.9rem; transition: var(--transition); display: inline-flex; align-items: center; gap: 8px; }
        .footer-col ul li a:hover { color: var(--secondary); transform: translateX(4px); }
        .footer-col ul li a i { width: 16px; font-size: 0.85rem; }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: 24px; margin-top: 8px;
            display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px;
            font-size: 0.85rem; color: rgba(255,255,255,0.4);
        }
        .footer-bottom a { color: rgba(255,255,255,0.45); }
        .footer-bottom a:hover { color: var(--secondary); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .related-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
        }

        @media (max-width: 768px) {
            .header-inner { padding: 0 16px; }
            .menu-toggle { display: block; }
            .main-nav {
                position: fixed; top: var(--header-height); left: 0; right: 0;
                background: var(--bg-white); flex-direction: column; padding: 20px 24px;
                box-shadow: var(--shadow-lg); border-bottom: 1px solid var(--border-color);
                transform: translateY(-120%); opacity: 0; transition: var(--transition);
                overflow-y: auto; max-height: calc(100vh - var(--header-height));
                align-items: stretch; gap: 4px;
            }
            .main-nav.open { transform: translateY(0); opacity: 1; }
            .main-nav > a { padding: 12px 16px; border-radius: var(--border-radius-sm); }
            .main-nav > a.active::after { display: none; }
            .nav-item-wrap > a { padding: 12px 16px; width: 100%; justify-content: space-between; }
            .mega-dropdown {
                position: static; transform: none; min-width: auto; padding: 12px 16px;
                box-shadow: none; border: 1px solid var(--border-color); margin-top: 4px;
                opacity: 1; visibility: visible; display: none;
            }
            .nav-item-wrap:hover .mega-dropdown { display: block; transform: none; }
            .mega-grid { grid-template-columns: 1fr; gap: 8px; }
            .nav-cta { text-align: center; margin-top: 8px; }

            .page-banner { padding: 60px 0 40px; min-height: 180px; }
            .page-banner h1 { font-size: 1.5rem; }
            .page-banner .meta-info { gap: 12px; font-size: 0.82rem; }

            .article-body { padding: 28px 20px; }
            .article-body .content { font-size: 1rem; }
            .article-body .content h2 { font-size: 1.3rem; }

            .related-grid { grid-template-columns: 1fr; }
            .related-section .section-title h2 { font-size: 1.5rem; }

            .cta-section h2 { font-size: 1.5rem; }
            .cta-section p { font-size: 0.95rem; }
            .cta-section .btn-group { flex-direction: column; align-items: center; }

            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }

        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .page-banner h1 { font-size: 1.2rem; }
            .article-body { padding: 20px 16px; }
            .article-body .content { font-size: 0.95rem; }
            .article-meta-bottom { flex-direction: column; align-items: flex-start; }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0f1b3d;
            --primary-light: #1a2d5e;
            --primary-dark: #080f24;
            --accent: #f0b429;
            --accent-light: #f7d06a;
            --accent-dark: #d4941a;
            --bg-body: #f5f7fc;
            --bg-white: #ffffff;
            --bg-light: #eef1f8;
            --bg-dark: #0a1230;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-muted: #7a7a9a;
            --text-white: #ffffff;
            --text-light: #c8cce0;
            --border-color: #e0e3ed;
            --border-light: #f0f2f8;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(15, 27, 61, 0.06);
            --shadow-md: 0 6px 24px rgba(15, 27, 61, 0.10);
            --shadow-lg: 0 16px 48px rgba(15, 27, 61, 0.14);
            --shadow-glow: 0 0 30px rgba(240, 180, 41, 0.20);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --container-w: 1200px;
            --header-h: 72px;
        }

        /* ===== 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-primary);
            background: var(--bg-body);
        }
        a { color: inherit; text-decoration: none; transition: var(--transition); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-md); }
        button, input, textarea { font-family: inherit; font-size: inherit; border: none; outline: none; transition: var(--transition); }
        button { cursor: pointer; background: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text-primary); }
        h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); }
        h2 { font-size: clamp(1.8rem, 3.5vw, 2.6rem); }
        h3 { font-size: clamp(1.3rem, 2.2vw, 1.7rem); }
        h4 { font-size: 1.15rem; }
        p { margin-bottom: 0.8rem; color: var(--text-secondary); }
        .container { max-width: var(--container-w); margin: 0 auto; padding: 0 24px; }
        .section { padding: 80px 0; }
        .section-title { text-align: center; margin-bottom: 48px; }
        .section-title h2 { margin-bottom: 12px; }
        .section-title p { max-width: 620px; margin: 0 auto; color: var(--text-muted); font-size: 1.05rem; }
        .text-center { text-align: center; }
        .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex; align-items: center; gap: 10px;
            padding: 12px 32px; border-radius: 60px; font-weight: 600; font-size: 1rem;
            transition: var(--transition); border: 2px solid transparent;
        }
        .btn-primary {
            background: var(--accent); color: var(--primary); border-color: var(--accent);
        }
        .btn-primary:hover { background: var(--accent-light); border-color: var(--accent-light); transform: translateY(-2px); box-shadow: var(--shadow-glow); }
        .btn-primary:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }
        .btn-outline {
            background: transparent; color: var(--text-white); border-color: rgba(255,255,255,0.4);
        }
        .btn-outline:hover { background: rgba(255,255,255,0.12); border-color: var(--text-white); transform: translateY(-2px); }
        .btn-outline:focus-visible { outline: 3px solid rgba(255,255,255,0.5); outline-offset: 3px; }
        .btn-lg { padding: 16px 44px; font-size: 1.1rem; }

        /* ===== 徽章 / 标签 ===== */
        .badge {
            display: inline-block; padding: 4px 16px; border-radius: 60px;
            font-size: 0.8rem; font-weight: 600; letter-spacing: 0.3px;
            background: rgba(240, 180, 41, 0.15); color: var(--accent-dark);
        }
        .badge-light { background: rgba(255,255,255,0.12); color: var(--text-light); }

        /* ===== 卡片 ===== */
        .card {
            background: var(--bg-white); border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm); padding: 32px 28px;
            transition: var(--transition); border: 1px solid var(--border-light);
        }
        .card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); border-color: var(--border-color); }
        .card-icon { width: 56px; height: 56px; border-radius: var(--radius-md); display: flex; align-items: center; justify-content: center; font-size: 1.6rem; color: var(--accent); background: rgba(240, 180, 41, 0.10); margin-bottom: 18px; }
        .card h3 { margin-bottom: 10px; }
        .card p { font-size: 0.95rem; color: var(--text-muted); }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed; top: 0; left: 0; width: 100%; height: var(--header-h);
            background: rgba(15, 27, 61, 0.92); backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255,255,255,0.06);
            z-index: 1000; transition: var(--transition);
        }
        .header-inner {
            max-width: var(--container-w); margin: 0 auto; padding: 0 24px;
            display: flex; align-items: center; justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex; align-items: center; gap: 10px; font-size: 1.3rem; font-weight: 700;
            color: var(--text-white); letter-spacing: 0.5px;
        }
        .logo i { color: var(--accent); font-size: 1.5rem; }
        .logo:hover { opacity: 0.85; }
        .main-nav { display: flex; align-items: center; gap: 28px; }
        .main-nav > a {
            color: rgba(255,255,255,0.75); font-size: 0.95rem; font-weight: 500;
            padding: 6px 0; position: relative; transition: var(--transition);
        }
        .main-nav > a::after {
            content: ''; position: absolute; bottom: -2px; left: 0; width: 0; height: 2px;
            background: var(--accent); border-radius: 2px; transition: var(--transition);
        }
        .main-nav > a:hover, .main-nav > a.active { color: var(--text-white); }
        .main-nav > a:hover::after, .main-nav > a.active::after { width: 100%; }
        .main-nav > a.active { color: var(--accent); }
        .main-nav > a.active::after { background: var(--accent); width: 100%; }
        .nav-cta {
            background: var(--accent); color: var(--primary) !important; padding: 8px 22px !important;
            border-radius: 60px; font-weight: 600 !important; font-size: 0.9rem !important;
            border: 2px solid var(--accent);
        }
        .nav-cta:hover { background: var(--accent-light); border-color: var(--accent-light); transform: translateY(-1px); color: var(--primary) !important; }
        .nav-cta::after { display: none !important; }

        /* Mega Dropdown */
        .nav-item-wrap { position: relative; }
        .nav-item-wrap > a { color: rgba(255,255,255,0.75); font-size: 0.95rem; font-weight: 500; padding: 6px 0; display: flex; align-items: center; }
        .nav-item-wrap > a:hover { color: var(--text-white); }
        .mega-dropdown {
            position: absolute; top: calc(100% + 16px); left: 50%; transform: translateX(-50%) translateY(6px);
            background: rgba(15, 27, 61, 0.96); backdrop-filter: blur(20px);
            border: 1px solid rgba(255,255,255,0.08); border-radius: var(--radius-lg);
            padding: 28px 24px; min-width: 520px;
            opacity: 0; visibility: hidden; pointer-events: none;
            transition: var(--transition); box-shadow: var(--shadow-lg);
        }
        .nav-item-wrap:hover .mega-dropdown { opacity: 1; visibility: visible; pointer-events: auto; transform: translateX(-50%) translateY(0); }
        .mega-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
        .mega-card {
            display: flex; align-items: center; gap: 14px; padding: 14px 16px;
            border-radius: var(--radius-md); transition: var(--transition);
            background: rgba(255,255,255,0.03);
        }
        .mega-card:hover { background: rgba(255,255,255,0.08); }
        .mega-card i { font-size: 1.3rem; color: var(--accent); width: 36px; text-align: center; flex-shrink: 0; }
        .mega-card h4 { color: var(--text-white); font-size: 0.95rem; font-weight: 600; margin-bottom: 2px; }
        .mega-card p { color: var(--text-light); font-size: 0.8rem; margin: 0; }

        .menu-toggle { display: none; font-size: 1.5rem; color: var(--text-white); background: none; border: none; padding: 6px; }

        /* ===== Hero / Banner ===== */
        .page-hero {
            position: relative; padding: 120px 0 80px; margin-top: var(--header-h);
            background: var(--primary-dark); overflow: hidden;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover; background-position: center; background-blend-mode: overlay;
        }
        .page-hero::before {
            content: ''; position: absolute; inset: 0;
            background: linear-gradient(135deg, rgba(15,27,61,0.88) 0%, rgba(15,27,61,0.72) 60%, rgba(15,27,61,0.50) 100%);
        }
        .page-hero .container { position: relative; z-index: 2; text-align: center; }
        .page-hero h1 { color: var(--text-white); margin-bottom: 16px; }
        .page-hero p { color: var(--text-light); font-size: 1.15rem; max-width: 680px; margin: 0 auto 28px; }
        .page-hero .hero-meta { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; }

        /* ===== 登录流程 ===== */
        .steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; counter-reset: step; }
        .step-card {
            background: var(--bg-white); border-radius: var(--radius-lg);
            padding: 36px 24px 28px; 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(-4px); }
        .step-card::before {
            counter-increment: step; content: counter(step);
            position: absolute; top: -14px; left: 50%; transform: translateX(-50%);
            width: 32px; height: 32px; border-radius: 50%;
            background: var(--accent); color: var(--primary);
            font-weight: 800; font-size: 0.9rem;
            display: flex; align-items: center; justify-content: center;
            box-shadow: 0 4px 12px rgba(240, 180, 41, 0.30);
        }
        .step-card .step-icon { font-size: 2.2rem; color: var(--primary-light); margin-bottom: 14px; margin-top: 4px; }
        .step-card h3 { font-size: 1.1rem; margin-bottom: 8px; }
        .step-card p { font-size: 0.9rem; color: var(--text-muted); margin: 0; }

        /* ===== 登录方式 ===== */
        .method-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
        .method-card {
            background: var(--bg-white); border-radius: var(--radius-lg);
            overflow: hidden; box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light); transition: var(--transition);
        }
        .method-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
        .method-card img { width: 100%; height: 200px; object-fit: cover; border-radius: 0; }
        .method-body { padding: 24px 22px 26px; }
        .method-body h3 { font-size: 1.15rem; margin-bottom: 6px; }
        .method-body p { font-size: 0.92rem; color: var(--text-muted); margin-bottom: 14px; }
        .method-body .tag { display: inline-block; padding: 2px 12px; border-radius: 60px; font-size: 0.75rem; font-weight: 600; background: rgba(240, 180, 41, 0.10); color: var(--accent-dark); }

        /* ===== 安全认证 ===== */
        .security-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
        .security-item {
            text-align: center; padding: 32px 18px;
            background: rgba(255,255,255,0.04); border-radius: var(--radius-md);
            border: 1px solid rgba(255,255,255,0.06); transition: var(--transition);
        }
        .security-item:hover { background: rgba(255,255,255,0.07); transform: translateY(-3px); }
        .security-item i { font-size: 2.2rem; color: var(--accent); margin-bottom: 14px; }
        .security-item h4 { color: var(--text-white); font-size: 1rem; margin-bottom: 4px; }
        .security-item p { color: var(--text-light); font-size: 0.85rem; margin: 0; }

        /* ===== 数据统计 ===== */
        .stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; }
        .stat-card {
            text-align: center; padding: 32px 16px;
            background: var(--bg-white); border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm); border: 1px solid var(--border-light);
        }
        .stat-card .stat-num { font-size: 2.8rem; font-weight: 800; color: var(--primary); line-height: 1.2; }
        .stat-card .stat-num span { color: var(--accent); }
        .stat-card p { color: var(--text-muted); font-size: 0.95rem; margin-top: 6px; }

        /* ===== FAQ ===== */
        .faq-list { max-width: 780px; margin: 0 auto; }
        .faq-item {
            background: var(--bg-white); border-radius: var(--radius-md);
            border: 1px solid var(--border-light); margin-bottom: 12px;
            overflow: hidden; transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--border-color); box-shadow: var(--shadow-sm); }
        .faq-question {
            display: flex; align-items: center; justify-content: space-between;
            padding: 18px 24px; font-weight: 600; font-size: 1rem;
            cursor: pointer; color: var(--text-primary); transition: var(--transition);
            background: transparent; width: 100; text-align: left;
        }
        .faq-question:hover { color: var(--primary-light); }
        .faq-question i { font-size: 0.85rem; color: var(--accent); transition: var(--transition); }
        .faq-item.active .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            padding: 0 24px 18px; font-size: 0.95rem; color: var(--text-secondary);
            display: none; line-height: 1.8;
        }
        .faq-item.active .faq-answer { display: block; }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--primary); background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover; background-position: center; background-blend-mode: overlay;
            position: relative; overflow: hidden;
        }
        .cta-section::before {
            content: ''; position: absolute; inset: 0;
            background: linear-gradient(135deg, rgba(15,27,61,0.92) 0%, rgba(15,27,61,0.70) 100%);
        }
        .cta-section .container { position: relative; z-index: 2; text-align: center; padding: 80px 24px; }
        .cta-section h2 { color: var(--text-white); margin-bottom: 14px; }
        .cta-section p { color: var(--text-light); max-width: 560px; margin: 0 auto 28px; font-size: 1.05rem; }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary-dark); color: var(--text-light); padding: 60px 0 0;
            border-top: 1px solid rgba(255,255,255,0.04);
        }
        .footer-grid { display: grid; grid-template-columns: 1.8fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,0.06); }
        .footer-brand .logo { color: var(--text-white); margin-bottom: 14px; }
        .footer-brand p { font-size: 0.9rem; color: var(--text-light); max-width: 320px; }
        .footer-col h4 { color: var(--text-white); font-size: 1rem; margin-bottom: 16px; }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a { color: var(--text-light); font-size: 0.9rem; }
        .footer-col ul li a:hover { color: var(--accent); padding-left: 4px; }
        .footer-col ul li a i { width: 20px; color: var(--accent); }
        .footer-bottom {
            display: flex; justify-content: space-between; align-items: center;
            padding: 24px 0; font-size: 0.85rem; color: var(--text-muted);
            flex-wrap: wrap; gap: 8px;
        }
        .footer-bottom a { color: var(--text-light); }
        .footer-bottom a:hover { color: var(--accent); }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .steps-grid { grid-template-columns: repeat(2, 1fr); }
            .security-grid { grid-template-columns: repeat(2, 1fr); }
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .mega-dropdown { min-width: 400px; }
        }

        @media (max-width: 768px) {
            .menu-toggle { display: block; }
            .main-nav {
                position: fixed; top: var(--header-h); left: 0; width: 100%; height: 0;
                background: rgba(15,27,61,0.98); backdrop-filter: blur(20px);
                flex-direction: column; gap: 0; overflow: hidden;
                transition: var(--transition); border-bottom: 1px solid rgba(255,255,255,0.06);
            }
            .main-nav.open { height: auto; padding: 16px 24px 28px; }
            .main-nav > a { padding: 12px 0; width: 100%; border-bottom: 1px solid rgba(255,255,255,0.04); }
            .main-nav > a::after { display: none; }
            .nav-item-wrap { width: 100%; }
            .nav-item-wrap > a { padding: 12px 0; width: 100%; border-bottom: 1px solid rgba(255,255,255,0.04); }
            .mega-dropdown {
                position: static; transform: none; min-width: auto;
                background: transparent; border: none; padding: 8px 0 12px 16px;
                opacity: 1; visibility: visible; pointer-events: auto;
                box-shadow: none; display: none;
            }
            .nav-item-wrap:hover .mega-dropdown { display: block; transform: none; }
            .mega-grid { grid-template-columns: 1fr; gap: 8px; }
            .nav-cta { margin-top: 12px; width: 100%; justify-content: center; }
            .page-hero { padding: 100px 0 60px; }
            .page-hero h1 { font-size: 2rem; }
            .steps-grid { grid-template-columns: 1fr; gap: 20px; }
            .method-grid { grid-template-columns: 1fr; gap: 20px; }
            .security-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .section { padding: 56px 0; }
            .faq-question { padding: 14px 18px; font-size: 0.95rem; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }

        @media (max-width: 520px) {
            .header-inner { padding: 0 16px; }
            .logo { font-size: 1.1rem; }
            .logo i { font-size: 1.2rem; }
            .page-hero { padding: 80px 0 48px; }
            .page-hero h1 { font-size: 1.7rem; }
            .page-hero p { font-size: 0.95rem; }
            .security-grid { grid-template-columns: 1fr; }
            .stats-grid { grid-template-columns: 1fr; }
            .stat-card .stat-num { font-size: 2.2rem; }
            .card { padding: 24px 18px; }
            .btn-lg { padding: 14px 32px; font-size: 1rem; }
            .container { padding: 0 16px; }
            .section-title { margin-bottom: 32px; }
        }

        /* ===== 辅助 ===== */
        .bg-dark-section { background: var(--primary); }
        .bg-dark-section .section-title h2 { color: var(--text-white); }
        .bg-dark-section .section-title p { color: var(--text-light); }
        .mt-12 { margin-top: 12px; }
        .gap-12 { gap: 12px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }

        /* ===== 图片占位优雅降级 ===== */
        .method-card img { background: var(--bg-light); }