/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --color-primary: #0a1628;
            --color-primary-light: #132040;
            --color-primary-dark: #050e1a;
            --color-accent: #c9a84c;
            --color-accent-light: #e0c06a;
            --color-accent-dark: #a88a30;
            --color-bg: #ffffff;
            --color-bg-alt: #f8f6f0;
            --color-bg-dark: #0a1628;
            --color-text: #1a1a2e;
            --color-text-light: #6b7280;
            --color-text-inverse: #ffffff;
            --color-border: #e5e7eb;
            --color-border-light: #f0f0f0;
            --color-success: #10b981;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
            --shadow-xl: 0 24px 60px rgba(0, 0, 0, 0.18);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

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

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.6;
            color: var(--color-text);
            background: var(--color-bg);
            min-height: 100vh;
        }

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

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

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

        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-sm);
            padding: 10px 16px;
            outline: none;
            transition: border-color var(--transition), box-shadow var(--transition);
        }

        input:focus,
        textarea:focus {
            border-color: var(--color-accent);
            box-shadow: 0 0 0 3px rgba(201, 168, 76, 0.15);
        }

        ul,
        ol {
            list-style: none;
        }

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

        .container-sm {
            max-width: 900px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .container-fluid {
            width: 100%;
            padding: 0 24px;
        }

        /* ===== Typography ===== */
        .heading-xl {
            font-size: clamp(2.4rem, 5vw, 4.2rem);
            font-weight: 800;
            line-height: 1.1;
            letter-spacing: -0.02em;
        }

        .heading-lg {
            font-size: clamp(1.8rem, 3.5vw, 2.8rem);
            font-weight: 700;
            line-height: 1.2;
            letter-spacing: -0.01em;
        }

        .heading-md {
            font-size: clamp(1.3rem, 2.5vw, 1.8rem);
            font-weight: 600;
            line-height: 1.3;
        }

        .heading-sm {
            font-size: clamp(1.05rem, 1.8vw, 1.25rem);
            font-weight: 600;
            line-height: 1.4;
        }

        .body-lg {
            font-size: 1.1rem;
            line-height: 1.7;
            color: var(--color-text-light);
        }

        .body-sm {
            font-size: 0.875rem;
            line-height: 1.5;
            color: var(--color-text-light);
        }

        .text-accent {
            color: var(--color-accent);
        }

        .text-center {
            text-align: center;
        }

        .text-gradient {
            background: linear-gradient(135deg, var(--color-accent-light), var(--color-accent-dark));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            font-size: 1rem;
            font-weight: 600;
            border-radius: var(--radius-md);
            transition: all var(--transition);
            border: 2px solid transparent;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--color-accent);
            color: var(--color-primary);
            border-color: var(--color-accent);
        }

        .btn-primary:hover {
            background: var(--color-accent-light);
            border-color: var(--color-accent-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(201, 168, 76, 0.35);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 4px 12px rgba(201, 168, 76, 0.25);
        }

        .btn-outline {
            background: transparent;
            color: var(--color-text-inverse);
            border-color: rgba(255, 255, 255, 0.5);
        }

        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.8);
            transform: translateY(-2px);
        }

        .btn-outline-dark {
            background: transparent;
            color: var(--color-primary);
            border-color: var(--color-border);
        }

        .btn-outline-dark:hover {
            border-color: var(--color-accent);
            color: var(--color-accent);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        .btn-lg {
            padding: 16px 40px;
            font-size: 1.1rem;
            border-radius: var(--radius-lg);
        }

        .btn-sm {
            padding: 8px 18px;
            font-size: 0.875rem;
            border-radius: var(--radius-sm);
        }

        .btn-icon {
            width: 44px;
            height: 44px;
            padding: 0;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }

        /* ===== Header & Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-height);
            background: rgba(255, 255, 255, 0.97);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--color-border-light);
            z-index: 1000;
            transition: box-shadow var(--transition);
        }

        .site-header.scrolled {
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
        }

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

        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--color-primary);
            letter-spacing: -0.02em;
        }

        .header-logo .logo-icon {
            width: 36px;
            height: 36px;
            background: var(--color-accent);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-primary);
            font-size: 1.1rem;
            font-weight: 800;
        }

        .header-logo:hover {
            color: var(--color-accent);
        }

        .nav-main {
            display: flex;
            align-items: center;
            gap: 32px;
        }

        .nav-main a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--color-text-light);
            position: relative;
            padding: 4px 0;
            transition: color var(--transition);
        }

        .nav-main a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--color-accent);
            border-radius: 2px;
            transition: width var(--transition);
        }

        .nav-main a:hover {
            color: var(--color-text);
        }

        .nav-main a:hover::after {
            width: 100%;
        }

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

        .nav-main a.active::after {
            width: 100%;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .header-search {
            display: flex;
            align-items: center;
            background: var(--color-bg-alt);
            border: 1px solid var(--color-border);
            border-radius: 100px;
            padding: 0 16px;
            transition: all var(--transition);
        }

        .header-search:focus-within {
            border-color: var(--color-accent);
            box-shadow: 0 0 0 3px rgba(201, 168, 76, 0.12);
            background: var(--color-bg);
        }

        .header-search input {
            border: none;
            background: transparent;
            padding: 8px 10px;
            font-size: 0.875rem;
            width: 160px;
            outline: none;
        }

        .header-search input::placeholder {
            color: var(--color-text-light);
        }

        .header-search button {
            color: var(--color-text-light);
            padding: 4px;
            font-size: 0.9rem;
            transition: color var(--transition);
        }

        .header-search button:hover {
            color: var(--color-accent);
        }

        .header-cta {
            padding: 8px 22px;
            font-size: 0.9rem;
            font-weight: 600;
            background: var(--color-accent);
            color: var(--color-primary);
            border-radius: 100px;
            transition: all var(--transition);
        }

        .header-cta:hover {
            background: var(--color-accent-light);
            transform: translateY(-1px);
            box-shadow: 0 4px 16px rgba(201, 168, 76, 0.3);
        }

        /* Mobile Menu Toggle */
        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 4px;
            cursor: pointer;
            background: none;
            border: none;
        }

        .menu-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--color-primary);
            border-radius: 2px;
            transition: all var(--transition);
        }

        .menu-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }

        .menu-toggle.active span:nth-child(2) {
            opacity: 0;
        }

        .menu-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ===== Hero Section ===== */
        .hero {
            position: relative;
            min-height: 92vh;
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
            background: var(--color-primary);
            margin-top: var(--header-height);
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.6;
            transform: scale(1.05);
            animation: heroZoom 20s ease-in-out infinite alternate;
        }

        @keyframes heroZoom {
            0% {
                transform: scale(1.05);
            }
            100% {
                transform: scale(1.15);
            }
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 22, 40, 0.92) 0%, rgba(10, 22, 40, 0.7) 50%, rgba(10, 22, 40, 0.85) 100%);
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 820px;
            padding: 60px 24px;
            text-align: center;
            color: var(--color-text-inverse);
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 18px;
            background: rgba(201, 168, 76, 0.15);
            border: 1px solid rgba(201, 168, 76, 0.3);
            border-radius: 100px;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--color-accent-light);
            margin-bottom: 24px;
            backdrop-filter: blur(4px);
        }

        .hero-title {
            margin-bottom: 20px;
        }

        .hero-title .highlight {
            background: linear-gradient(135deg, var(--color-accent-light), var(--color-accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-desc {
            font-size: 1.2rem;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.75);
            max-width: 640px;
            margin: 0 auto 36px;
        }

        .hero-actions {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .hero-stats {
            display: flex;
            justify-content: center;
            gap: 48px;
            margin-top: 56px;
            flex-wrap: wrap;
        }

        .hero-stat {
            text-align: center;
        }

        .hero-stat-number {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--color-accent);
            line-height: 1.2;
        }

        .hero-stat-label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.55);
            margin-top: 4px;
        }

        .hero-scroll {
            position: absolute;
            bottom: 30px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 2;
            color: rgba(255, 255, 255, 0.4);
            font-size: 1.4rem;
            animation: bounceDown 2s ease-in-out infinite;
        }

        @keyframes bounceDown {
            0%,
            100% {
                transform: translateX(-50%) translateY(0);
            }
            50% {
                transform: translateX(-50%) translateY(8px);
            }
        }

        /* ===== Section Common ===== */
        .section {
            padding: 80px 0;
        }

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

        .section-dark {
            background: var(--color-bg-dark);
            color: var(--color-text-inverse);
        }

        .section-header {
            margin-bottom: 48px;
            max-width: 720px;
        }

        .section-header.center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 14px;
            background: rgba(201, 168, 76, 0.12);
            border-radius: 100px;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--color-accent-dark);
            text-transform: uppercase;
            letter-spacing: 0.04em;
            margin-bottom: 12px;
        }

        .section-dark .section-tag {
            background: rgba(201, 168, 76, 0.15);
            color: var(--color-accent-light);
        }

        .section-title {
            margin-bottom: 12px;
        }

        .section-desc {
            font-size: 1.05rem;
            color: var(--color-text-light);
            max-width: 600px;
        }

        .section-dark .section-desc {
            color: rgba(255, 255, 255, 0.6);
        }

        .section-desc.center {
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== Card Grid ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 24px;
        }

        .card-grid-3 {
            grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
        }

        .card-grid-4 {
            grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
        }

        /* ===== Cards ===== */
        .card {
            background: var(--color-bg);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition);
            border: 1px solid var(--color-border-light);
            box-shadow: var(--shadow-sm);
        }

        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(201, 168, 76, 0.2);
        }

        .card-image {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            transition: transform 0.6s ease;
        }

        .card:hover .card-image {
            transform: scale(1.05);
        }

        .card-body {
            padding: 20px 22px 24px;
        }

        .card-category {
            display: inline-block;
            padding: 2px 12px;
            background: rgba(201, 168, 76, 0.1);
            border-radius: 100px;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--color-accent-dark);
            margin-bottom: 8px;
        }

        .card-title {
            font-size: 1.1rem;
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .card-title a {
            color: var(--color-text);
        }

        .card-title a:hover {
            color: var(--color-accent);
        }

        .card-excerpt {
            font-size: 0.9rem;
            color: var(--color-text-light);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
        }

        .card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--color-text-light);
        }

        .card-meta i {
            color: var(--color-accent);
        }

        .card-link {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--color-accent-dark);
            transition: gap var(--transition);
        }

        .card-link:hover {
            gap: 8px;
            color: var(--color-accent);
        }

        /* ===== Feature Cards ===== */
        .feature-card {
            background: var(--color-bg);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            border: 1px solid var(--color-border-light);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            text-align: center;
        }

        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(201, 168, 76, 0.25);
        }

        .feature-icon {
            width: 64px;
            height: 64px;
            margin: 0 auto 20px;
            background: rgba(201, 168, 76, 0.1);
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--color-accent);
            transition: all var(--transition);
        }

        .feature-card:hover .feature-icon {
            background: var(--color-accent);
            color: var(--color-primary);
            transform: scale(1.05);
        }

        .feature-title {
            font-size: 1.15rem;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .feature-desc {
            font-size: 0.9rem;
            color: var(--color-text-light);
            line-height: 1.6;
        }

        /* ===== Stats Section ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            text-align: center;
        }

        .stat-item {
            padding: 24px 16px;
        }

        .stat-number {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--color-accent);
            line-height: 1.1;
            margin-bottom: 4px;
        }

        .stat-label {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.65);
        }

        /* ===== Process / Timeline ===== */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
            counter-reset: step;
        }

        .process-step {
            text-align: center;
            position: relative;
            padding: 32px 20px;
        }

        .process-step::after {
            content: '';
            position: absolute;
            top: 50%;
            right: -16px;
            width: 32px;
            height: 2px;
            background: var(--color-border);
        }

        .process-step:last-child::after {
            display: none;
        }

        .step-number {
            width: 56px;
            height: 56px;
            margin: 0 auto 20px;
            background: var(--color-accent);
            color: var(--color-primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            font-weight: 800;
            transition: all var(--transition);
        }

        .process-step:hover .step-number {
            transform: scale(1.1);
            box-shadow: 0 8px 24px rgba(201, 168, 76, 0.3);
        }

        .step-title {
            font-size: 1.15rem;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .step-desc {
            font-size: 0.9rem;
            color: var(--color-text-light);
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
        }

        .faq-item {
            border-bottom: 1px solid var(--color-border);
            padding: 20px 0;
        }

        .faq-item:first-child {
            border-top: 1px solid var(--color-border);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            font-size: 1.05rem;
            font-weight: 600;
            cursor: pointer;
            padding: 4px 0;
            transition: color var(--transition);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            color: var(--color-text);
        }

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

        .faq-question .faq-toggle {
            font-size: 1.1rem;
            color: var(--color-accent);
            transition: transform var(--transition);
            flex-shrink: 0;
        }

        .faq-item.active .faq-toggle {
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 24px 0 0;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding-top: 12px;
        }

        .faq-answer p {
            font-size: 0.95rem;
            color: var(--color-text-light);
            line-height: 1.7;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--color-primary);
            border-radius: var(--radius-lg);
            padding: 60px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.1;
        }

        .cta-content {
            position: relative;
            z-index: 1;
            max-width: 600px;
            margin: 0 auto;
            color: var(--color-text-inverse);
        }

        .cta-title {
            font-size: clamp(1.6rem, 3vw, 2.2rem);
            font-weight: 700;
            margin-bottom: 12px;
        }

        .cta-desc {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.65);
            margin-bottom: 28px;
        }

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

        /* ===== Footer ===== */
        .site-footer {
            background: var(--color-primary);
            color: var(--color-text-inverse);
            padding: 60px 0 32px;
        }

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

        .footer-brand .header-logo {
            color: var(--color-text-inverse);
            margin-bottom: 12px;
        }

        .footer-brand .header-logo .logo-icon {
            background: var(--color-accent);
            color: var(--color-primary);
        }

        .footer-about {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.55);
            line-height: 1.7;
            max-width: 320px;
            margin-bottom: 20px;
        }

        .footer-social {
            display: flex;
            gap: 12px;
        }

        .footer-social a {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.95rem;
            transition: all var(--transition);
        }

        .footer-social a:hover {
            background: var(--color-accent);
            color: var(--color-primary);
            transform: translateY(-2px);
        }

        .footer-heading {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 16px;
            color: var(--color-text-inverse);
        }

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

        .footer-links a {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.5);
            transition: color var(--transition);
        }

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

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 24px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.35);
            flex-wrap: wrap;
            gap: 12px;
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.35);
        }

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

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--color-text-light);
            padding: 16px 0;
        }

        .breadcrumb a {
            color: var(--color-text-light);
        }

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

        .breadcrumb .separator {
            color: var(--color-border);
        }

        /* ===== Empty State ===== */
        .empty-state {
            text-align: center;
            padding: 40px 20px;
            color: var(--color-text-light);
        }

        .empty-state i {
            font-size: 2.4rem;
            color: var(--color-border);
            margin-bottom: 16px;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
            .process-grid {
                grid-template-columns: repeat(1, 1fr);
                gap: 24px;
            }
            .process-step::after {
                display: none;
            }
            .hero-stats {
                gap: 32px;
            }
            .card-grid-3 {
                grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 64px;
            }
            .section {
                padding: 56px 0;
            }
            .header-search {
                display: none;
            }
            .nav-main {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(12px);
                -webkit-backdrop-filter: blur(12px);
                flex-direction: column;
                padding: 24px 32px 32px;
                gap: 20px;
                border-bottom: 1px solid var(--color-border-light);
                transform: translateY(-110%);
                opacity: 0;
                transition: all var(--transition);
                box-shadow: var(--shadow-lg);
                align-items: stretch;
            }
            .nav-main.open {
                transform: translateY(0);
                opacity: 1;
            }
            .nav-main a {
                font-size: 1.05rem;
                padding: 8px 0;
            }
            .nav-main a::after {
                display: none;
            }
            .menu-toggle {
                display: flex;
            }
            .header-cta {
                padding: 6px 18px;
                font-size: 0.85rem;
            }
            .hero {
                min-height: 80vh;
            }
            .hero-title {
                font-size: clamp(1.8rem, 6vw, 2.6rem);
            }
            .hero-desc {
                font-size: 1rem;
            }
            .hero-stats {
                gap: 24px;
                margin-top: 36px;
            }
            .hero-stat-number {
                font-size: 1.6rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .card-grid {
                grid-template-columns: 1fr;
            }
            .card-grid-3 {
                grid-template-columns: 1fr;
            }
            .card-grid-4 {
                grid-template-columns: 1fr 1fr;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-number {
                font-size: 2rem;
            }
            .cta-section {
                padding: 40px 24px;
                border-radius: var(--radius-md);
            }
            .hero-actions {
                flex-direction: column;
                width: 100%;
            }
            .hero-actions .btn {
                width: 100%;
                max-width: 320px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .header-inner {
                padding: 0 16px;
            }
            .header-logo {
                font-size: 1.1rem;
            }
            .header-logo .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 0.9rem;
            }
            .hero {
                min-height: 70vh;
            }
            .hero-content {
                padding: 40px 16px;
            }
            .hero-badge {
                font-size: 0.75rem;
                padding: 4px 14px;
            }
            .hero-stats {
                flex-direction: column;
                gap: 16px;
            }
            .section {
                padding: 40px 0;
            }
            .section-header {
                margin-bottom: 32px;
            }
            .card-grid-4 {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-item {
                padding: 16px 8px;
            }
            .stat-number {
                font-size: 1.6rem;
            }
            .feature-card {
                padding: 24px 20px;
            }
            .faq-question {
                font-size: 0.95rem;
            }
            .cta-section {
                padding: 32px 20px;
            }
            .btn-lg {
                padding: 14px 28px;
                font-size: 1rem;
            }
            .footer-grid {
                gap: 24px;
            }
        }

        /* ===== Utility ===== */
        .gap-8 {
            gap: 8px;
        }
        .gap-12 {
            gap: 12px;
        }
        .gap-16 {
            gap: 16px;
        }
        .gap-24 {
            gap: 24px;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .mt-48 {
            margin-top: 48px;
        }
        .mb-16 {
            margin-bottom: 16px;
        }
        .mb-24 {
            margin-bottom: 24px;
        }
        .mb-32 {
            margin-bottom: 32px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .flex-wrap {
            flex-wrap: wrap;
        }
        .w-full {
            width: 100%;
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            border: 0;
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #e63946;
            --primary-dark: #c1121f;
            --primary-light: #ff6b6b;
            --secondary: #1d3557;
            --secondary-light: #457b9d;
            --accent: #f4a261;
            --bg-body: #f8f9fa;
            --bg-white: #ffffff;
            --bg-dark: #1a1a2e;
            --bg-card: #ffffff;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-muted: #8888a0;
            --text-white: #ffffff;
            --border-color: #e8e8f0;
            --border-light: #f0f0f5;
            --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, 0.08);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.12);
            --shadow-hover: 0 20px 40px rgba(230, 57, 70, 0.15);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --container-width: 1200px;
            --nav-height: 72px;
            --spacing-section: 80px;
            --spacing-block: 48px;
        }

        /* ===== 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: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-dark); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--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 ===== */
        .container {
            width: 100%;
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.97);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.04);
            height: var(--nav-height);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
            gap: 16px;
        }
        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--text-primary);
            text-decoration: none;
            flex-shrink: 0;
        }
        .header-logo:hover { color: var(--primary); }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            border-radius: var(--radius-sm);
            font-size: 20px;
            font-weight: 800;
            box-shadow: 0 4px 12px rgba(230, 57, 70, 0.3);
        }
        .nav-main {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: wrap;
        }
        .nav-main a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .nav-main a:hover {
            color: var(--primary);
            background: rgba(230, 57, 70, 0.06);
        }
        .nav-main a.active {
            color: var(--primary);
            background: rgba(230, 57, 70, 0.10);
            font-weight: 600;
        }
        .nav-main a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .header-search {
            display: flex;
            align-items: center;
            background: var(--bg-body);
            border-radius: 50px;
            padding: 0 16px;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .header-search:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(230, 57, 70, 0.1);
        }
        .header-search input {
            padding: 8px 4px 8px 0;
            width: 140px;
            background: transparent;
            border: none;
            font-size: 14px;
            color: var(--text-primary);
        }
        .header-search input::placeholder { color: var(--text-muted); }
        .header-search button {
            padding: 8px 4px;
            color: var(--text-muted);
            font-size: 15px;
            transition: var(--transition);
        }
        .header-search button:hover { color: var(--primary); }
        .header-cta {
            padding: 10px 24px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff !important;
            border-radius: 50px;
            font-size: 14px;
            font-weight: 600;
            transition: var(--transition);
            box-shadow: 0 4px 14px rgba(230, 57, 70, 0.3);
            white-space: nowrap;
        }
        .header-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(230, 57, 70, 0.4);
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            background: none;
            border: none;
            cursor: pointer;
        }
        .nav-toggle span {
            display: block;
            width: 24px;
            height: 2.5px;
            background: var(--text-primary);
            border-radius: 4px;
            transition: var(--transition);
        }

        /* ===== Page Banner ===== */
        .page-banner {
            padding-top: calc(var(--nav-height) + 40px);
            padding-bottom: 60px;
            background: linear-gradient(135deg, var(--secondary) 0%, #16213e 100%);
            position: relative;
            overflow: hidden;
            min-height: 280px;
            display: flex;
            align-items: center;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }
        .page-banner .container {
            position: relative;
            z-index: 2;
        }
        .page-banner h1 {
            font-size: 36px;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }
        .page-banner .banner-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
            color: rgba(255, 255, 255, 0.75);
            font-size: 14px;
        }
        .page-banner .banner-meta .badge {
            display: inline-block;
            padding: 4px 14px;
            background: rgba(255, 255, 255, 0.15);
            border-radius: 50px;
            color: #fff;
            font-size: 13px;
            font-weight: 500;
            backdrop-filter: blur(4px);
        }
        .page-banner .banner-meta i { margin-right: 6px; }
        .banner-wave {
            position: absolute;
            bottom: -2px;
            left: 0;
            right: 0;
            height: 60px;
            background: var(--bg-body);
            clip-path: ellipse(70% 100% at 50% 100%);
        }

        /* ===== 文章主体 ===== */
        .article-main {
            padding: var(--spacing-section) 0;
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 48px;
            align-items: start;
        }
        .article-body {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 40px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
        }
        .article-body .article-content {
            font-size: 16px;
            line-height: 1.9;
            color: var(--text-secondary);
        }
        .article-body .article-content p {
            margin-bottom: 20px;
        }
        .article-body .article-content h2 {
            font-size: 24px;
            margin-top: 36px;
            margin-bottom: 16px;
            color: var(--text-primary);
        }
        .article-body .article-content h3 {
            font-size: 20px;
            margin-top: 28px;
            margin-bottom: 12px;
            color: var(--text-primary);
        }
        .article-body .article-content ul,
        .article-body .article-content ol {
            margin-bottom: 20px;
            padding-left: 24px;
        }
        .article-body .article-content li {
            margin-bottom: 8px;
            list-style: disc;
        }
        .article-body .article-content blockquote {
            border-left: 4px solid var(--primary);
            padding: 16px 20px;
            background: rgba(230, 57, 70, 0.04);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 24px 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-body .article-content img {
            border-radius: var(--radius-md);
            margin: 24px 0;
            width: 100%;
            object-fit: cover;
        }
        .article-body .article-content a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-body .article-content a:hover { color: var(--primary-dark); }

        .article-not-found {
            text-align: center;
            padding: 80px 24px;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
        }
        .article-not-found i {
            font-size: 64px;
            color: var(--text-muted);
            margin-bottom: 24px;
        }
        .article-not-found h2 {
            font-size: 28px;
            margin-bottom: 12px;
        }
        .article-not-found p {
            color: var(--text-muted);
            margin-bottom: 24px;
        }
        .article-not-found .btn-back {
            display: inline-block;
            padding: 12px 32px;
            background: var(--primary);
            color: #fff;
            border-radius: 50px;
            font-weight: 600;
            transition: var(--transition);
        }
        .article-not-found .btn-back:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }

        /* ===== 侧边栏 ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }
        .sidebar-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
        }
        .sidebar-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--border-light);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card h3 i { color: var(--primary); }
        .sidebar-list li {
            margin-bottom: 12px;
        }
        .sidebar-list a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 8px 12px;
            border-radius: var(--radius-sm);
            color: var(--text-secondary);
            transition: var(--transition);
            font-size: 14px;
        }
        .sidebar-list a:hover {
            background: rgba(230, 57, 70, 0.05);
            color: var(--primary);
            transform: translateX(4px);
        }
        .sidebar-list a .num {
            width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--bg-body);
            border-radius: 50%;
            font-size: 12px;
            font-weight: 700;
            color: var(--text-muted);
            flex-shrink: 0;
        }
        .sidebar-list a:hover .num {
            background: var(--primary);
            color: #fff;
        }
        .sidebar-cta {
            background: linear-gradient(135deg, var(--secondary), #16213e);
            color: #fff;
            border: none;
        }
        .sidebar-cta h3 { color: #fff; border-bottom-color: rgba(255,255,255,0.2); }
        .sidebar-cta h3 i { color: var(--accent); }
        .sidebar-cta p {
            color: rgba(255,255,255,0.7);
            font-size: 14px;
            margin-bottom: 20px;
            line-height: 1.7;
        }
        .sidebar-cta .btn-light {
            display: inline-block;
            padding: 10px 28px;
            background: rgba(255,255,255,0.15);
            color: #fff;
            border-radius: 50px;
            font-weight: 600;
            font-size: 14px;
            transition: var(--transition);
            backdrop-filter: blur(4px);
            border: 1px solid rgba(255,255,255,0.2);
        }
        .sidebar-cta .btn-light:hover {
            background: rgba(255,255,255,0.25);
            transform: translateY(-2px);
        }

        /* ===== 相关文章 ===== */
        .related-section {
            padding: 60px 0 80px;
            background: var(--bg-body);
        }
        .related-section .section-title {
            font-size: 28px;
            font-weight: 800;
            margin-bottom: 32px;
            text-align: center;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }
        .related-card .card-img {
            height: 180px;
            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;
        }
        .related-card .card-body h4 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body h4 a { color: var(--text-primary); }
        .related-card .card-body h4 a:hover { color: var(--primary); }
        .related-card .card-body .card-meta {
            font-size: 13px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .related-card .card-body .card-meta span { display: flex; align-items: center; gap: 4px; }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand .header-logo { color: #fff; margin-bottom: 16px; }
        .footer-brand .header-logo:hover { color: var(--primary-light); }
        .footer-about {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 20px;
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            color: rgba(255, 255, 255, 0.6);
            font-size: 18px;
            transition: var(--transition);
        }
        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-3px);
        }
        .footer-heading {
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 18px;
        }
        .footer-links li { margin-bottom: 10px; }
        .footer-links a {
            color: rgba(255, 255, 255, 0.55);
            font-size: 14px;
            transition: var(--transition);
        }
        .footer-links a:hover { color: var(--primary-light); padding-left: 4px; }
        .footer-bottom {
            padding: 24px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }

        /* ===== 通用工具 ===== */
        .text-center { text-align: center; }
        .mt-8 { margin-top: 8px; }
        .mt-16 { margin-top: 16px; }
        .mb-16 { margin-bottom: 16px; }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr;
            }
            .article-sidebar {
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .header-search input { width: 100px; }
        }

        @media (max-width: 768px) {
            :root {
                --spacing-section: 48px;
                --nav-height: 64px;
            }
            .nav-main {
                display: none;
                flex-direction: column;
                position: absolute;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(12px);
                padding: 16px 24px;
                border-bottom: 1px solid var(--border-light);
                box-shadow: var(--shadow-md);
                gap: 4px;
            }
            .nav-main.open { display: flex; }
            .nav-main a { padding: 12px 16px; font-size: 16px; }
            .nav-main a.active::after { display: none; }
            .nav-toggle { display: flex; }
            .header-cta { padding: 8px 18px; font-size: 13px; }
            .header-search input { width: 80px; }
            .page-banner { min-height: 200px; padding-top: calc(var(--nav-height) + 24px); padding-bottom: 36px; }
            .page-banner h1 { font-size: 24px; }
            .article-body { padding: 24px; }
            .article-body .article-content { font-size: 15px; }
            .article-sidebar { grid-template-columns: 1fr; }
            .related-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }

        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .header-search input { width: 60px; }
            .header-cta { padding: 6px 14px; font-size: 12px; }
            .page-banner h1 { font-size: 20px; }
            .article-body { padding: 16px; }
            .article-body .article-content { font-size: 14px; }
            .sidebar-card { padding: 20px 16px; }
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #c0392b;
            --primary-dark: #a93226;
            --primary-light: #e74c3c;
            --secondary: #2c3e50;
            --secondary-light: #34495e;
            --accent: #f39c12;
            --bg-body: #f8f9fa;
            --bg-white: #ffffff;
            --bg-dark: #1a1a2e;
            --bg-card: #ffffff;
            --text-dark: #1a1a2e;
            --text-body: #333333;
            --text-light: #666666;
            --text-muted: #999999;
            --border-color: #e8e8e8;
            --border-light: #f0f0f0;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 6px 24px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
            --shadow-hover: 0 16px 48px rgba(0,0,0,0.15);
            --transition: 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;
            --spacing-section: 80px;
            --spacing-section-mobile: 48px;
        }

        /* ===== 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-family);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-body);
            background: var(--bg-body);
            padding-top: var(--header-height);
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: inherit; text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary); }
        button, input, textarea, select { font-family: inherit; font-size: inherit; outline: none; border: none; }
        button { cursor: pointer; background: none; }
        ul { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.25; color: var(--text-dark); font-weight: 700; }
        h1 { font-size: 2.8rem; }
        h2 { font-size: 2rem; }
        h3 { font-size: 1.4rem; }
        h4 { font-size: 1.15rem; }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header & Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--header-height);
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-light);
            box-shadow: 0 2px 12px rgba(0,0,0,0.04);
            z-index: 1000;
            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;
            height: 100%;
        }
        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text-dark);
            letter-spacing: -0.5px;
            flex-shrink: 0;
        }
        .header-logo .logo-icon {
            width: 40px;
            height: 40px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            font-weight: 800;
        }
        .header-logo:hover { color: var(--text-dark); }
        .nav-main {
            display: flex;
            align-items: center;
            gap: 8px;
            margin: 0 16px;
        }
        .nav-main a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-body);
            transition: var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .nav-main a:hover {
            color: var(--primary);
            background: rgba(192, 57, 43, 0.06);
        }
        .nav-main a.active {
            color: var(--primary);
            background: rgba(192, 57, 43, 0.10);
            font-weight: 600;
        }
        .nav-main a.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .search-box {
            display: flex;
            align-items: center;
            background: var(--bg-body);
            border-radius: 40px;
            padding: 0 16px;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .search-box:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(192, 57, 43, 0.12);
        }
        .search-box input {
            background: transparent;
            padding: 8px 8px 8px 4px;
            font-size: 0.9rem;
            color: var(--text-dark);
            width: 140px;
            transition: var(--transition);
        }
        .search-box input::placeholder { color: var(--text-muted); }
        .search-box button {
            color: var(--text-light);
            font-size: 0.95rem;
            padding: 6px 4px;
        }
        .search-box button:hover { color: var(--primary); }
        .btn-cta {
            background: var(--primary);
            color: #fff;
            padding: 10px 26px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
            white-space: nowrap;
            border: 2px solid transparent;
        }
        .btn-cta:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(192, 57, 43, 0.30);
        }
        .btn-cta:focus-visible { outline: 3px solid rgba(192, 57, 43, 0.5); outline-offset: 2px; }
        .mobile-toggle {
            display: none;
            font-size: 1.5rem;
            color: var(--text-dark);
            padding: 6px 10px;
            border-radius: var(--radius-sm);
            background: var(--bg-body);
        }
        .mobile-toggle:hover { background: var(--border-light); }

        /* ===== Hero / Banner ===== */
        .category-hero {
            position: relative;
            background: var(--bg-dark);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center center;
            background-repeat: no-repeat;
            min-height: 340px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 60px 24px;
            overflow: hidden;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26,26,46,0.82) 0%, rgba(26,26,46,0.50) 100%);
            z-index: 1;
        }
        .category-hero .hero-content {
            position: relative;
            z-index: 2;
            max-width: 780px;
        }
        .category-hero h1 {
            color: #ffffff;
            font-size: 3rem;
            font-weight: 800;
            letter-spacing: -1px;
            margin-bottom: 16px;
            text-shadow: 0 2px 12px rgba(0,0,0,0.3);
        }
        .category-hero p {
            color: rgba(255,255,255,0.85);
            font-size: 1.15rem;
            line-height: 1.7;
            max-width: 600px;
            margin: 0 auto 24px;
        }
        .hero-badge {
            display: inline-block;
            background: rgba(255,255,255,0.15);
            backdrop-filter: blur(6px);
            color: #fff;
            padding: 6px 20px;
            border-radius: 40px;
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 18px;
            border: 1px solid rgba(255,255,255,0.20);
        }

        /* ===== Section Shared ===== */
        .section {
            padding: var(--spacing-section) 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: 48px;
        }
        .section-header h2 {
            margin-bottom: 12px;
            position: relative;
            display: inline-block;
        }
        .section-header h2::after {
            content: '';
            display: block;
            width: 50px;
            height: 4px;
            background: var(--primary);
            border-radius: 4px;
            margin: 12px auto 0;
        }
        .section-header p {
            color: var(--text-light);
            font-size: 1.05rem;
            max-width: 600px;
            margin: 8px auto 0;
        }
        .section-dark .section-header p { color: rgba(255,255,255,0.65); }

        /* ===== Tags ===== */
        .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
            margin-top: 28px;
        }
        .tag-item {
            display: inline-block;
            padding: 6px 20px;
            border-radius: 40px;
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-body);
            transition: var(--transition);
        }
        .tag-item:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            transform: translateY(-2px);
            box-shadow: var(--shadow-sm);
        }
        .tag-item.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .section-dark .tag-item {
            background: rgba(255,255,255,0.10);
            border-color: rgba(255,255,255,0.15);
            color: rgba(255,255,255,0.85);
        }
        .section-dark .tag-item:hover {
            background: var(--primary);
            border-color: var(--primary);
        }

        /* ===== Cards Grid ===== */
        .cards-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .card-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .card-item:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: transparent;
        }
        .card-item .card-img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            display: block;
            background: var(--border-light);
        }
        .card-item .card-body {
            padding: 20px 22px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .card-item .card-tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--primary);
            background: rgba(192, 57, 43, 0.08);
            padding: 3px 12px;
            border-radius: 20px;
            margin-bottom: 10px;
            align-self: flex-start;
        }
        .card-item h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-dark);
            line-height: 1.4;
        }
        .card-item p {
            color: var(--text-light);
            font-size: 0.9rem;
            line-height: 1.6;
            flex: 1;
        }
        .card-item .card-meta {
            margin-top: 14px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.8rem;
            color: var(--text-muted);
            border-top: 1px solid var(--border-light);
            padding-top: 12px;
        }
        .card-item .card-meta i { margin-right: 4px; }

        /* ===== Stats / Data Panels ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 32px 20px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .stat-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .stat-card .stat-number {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.1;
            margin-bottom: 6px;
        }
        .stat-card .stat-label {
            font-size: 0.9rem;
            color: var(--text-light);
            font-weight: 500;
        }
        .stat-card .stat-icon {
            font-size: 1.8rem;
            color: var(--primary);
            margin-bottom: 12px;
            opacity: 0.6;
        }

        /* ===== Featured List ===== */
        .featured-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
            max-width: 800px;
            margin: 0 auto;
        }
        .featured-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 18px 22px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .featured-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateX(4px);
        }
        .featured-item .fi-rank {
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--primary);
            min-width: 36px;
            line-height: 1.4;
        }
        .featured-item .fi-content {
            flex: 1;
        }
        .featured-item .fi-content h4 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 4px;
            color: var(--text-dark);
        }
        .featured-item .fi-content p {
            font-size: 0.88rem;
            color: var(--text-light);
        }
        .featured-item .fi-meta {
            font-size: 0.78rem;
            color: var(--text-muted);
            white-space: nowrap;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--border-color); }
        .faq-item summary {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-dark);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            list-style: none;
            transition: var(--transition);
        }
        .faq-item summary::-webkit-details-marker { display: none; }
        .faq-item summary::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 0.8rem;
            color: var(--text-muted);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item[open] summary::after { transform: rotate(180deg); color: var(--primary); }
        .faq-item[open] summary { color: var(--primary); }
        .faq-item .faq-answer {
            padding: 0 24px 18px;
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .section-dark .faq-item {
            background: rgba(255,255,255,0.06);
            border-color: rgba(255,255,255,0.10);
        }
        .section-dark .faq-item summary { color: rgba(255,255,255,0.90); }
        .section-dark .faq-item[open] summary { color: var(--accent); }
        .section-dark .faq-item .faq-answer { color: rgba(255,255,255,0.70); }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            padding: 72px 24px;
            text-align: center;
            border-radius: var(--radius-lg);
            margin: 0 24px;
        }
        .cta-section h2 {
            color: #fff;
            font-size: 2rem;
            margin-bottom: 12px;
        }
        .cta-section p {
            color: rgba(255,255,255,0.85);
            font-size: 1.05rem;
            margin-bottom: 28px;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-section .btn-cta-light {
            display: inline-block;
            background: #fff;
            color: var(--primary);
            padding: 14px 40px;
            border-radius: 40px;
            font-weight: 700;
            font-size: 1.05rem;
            transition: var(--transition);
            border: 2px solid transparent;
        }
        .cta-section .btn-cta-light:hover {
            background: transparent;
            color: #fff;
            border-color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(0,0,0,0.20);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.70);
            padding: 56px 0 0;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .footer-brand .header-logo { color: #fff; margin-bottom: 16px; }
        .footer-brand .header-logo .logo-icon { background: var(--primary); }
        .footer-about {
            font-size: 0.9rem;
            line-height: 1.7;
            color: rgba(255,255,255,0.55);
            margin-bottom: 18px;
            max-width: 320px;
        }
        .footer-social {
            display: flex;
            gap: 14px;
        }
        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255,255,255,0.08);
            color: rgba(255,255,255,0.60);
            font-size: 1.1rem;
            transition: var(--transition);
        }
        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .footer-heading {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
        }
        .footer-links li { margin-bottom: 10px; }
        .footer-links a {
            color: rgba(255,255,255,0.55);
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .footer-links a:hover { color: var(--primary); padding-left: 4px; }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.40);
            flex-wrap: wrap;
            gap: 8px;
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-light);
            padding: 16px 0;
            flex-wrap: wrap;
        }
        .breadcrumb a { color: var(--text-light); }
        .breadcrumb a:hover { color: var(--primary); }
        .breadcrumb span { color: var(--text-muted); }
        .breadcrumb .sep { color: var(--border-color); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .cards-grid { grid-template-columns: repeat(2, 1fr); }
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .category-hero h1 { font-size: 2.4rem; }
            .header-logo { font-size: 1.2rem; }
            .header-logo .logo-icon { width: 36px; height: 36px; font-size: 1rem; }
            .search-box input { width: 100px; }
        }

        @media (max-width: 768px) {
            :root { --spacing-section: var(--spacing-section-mobile); }
            .nav-main {
                position: fixed;
                top: var(--header-height);
                left: 0;
                width: 100%;
                background: var(--bg-white);
                flex-direction: column;
                padding: 16px 24px;
                box-shadow: var(--shadow-lg);
                gap: 4px;
                border-top: 1px solid var(--border-light);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: var(--transition);
                z-index: 999;
            }
            .nav-main.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-main a {
                padding: 12px 16px;
                width: 100%;
                border-radius: var(--radius-sm);
            }
            .nav-main a.active::after { display: none; }
            .nav-main a.active { background: rgba(192,57,43,0.08); }
            .mobile-toggle { display: block; }
            .header-actions .search-box { display: none; }
            .header-actions .btn-cta { padding: 8px 18px; font-size: 0.85rem; }
            .category-hero { min-height: 260px; padding: 40px 20px; }
            .category-hero h1 { font-size: 2rem; }
            .category-hero p { font-size: 1rem; }
            .cards-grid { grid-template-columns: 1fr; gap: 20px; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
            .stat-card { padding: 24px 16px; }
            .stat-card .stat-number { font-size: 1.8rem; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .cta-section { margin: 0 16px; padding: 48px 20px; }
            .cta-section h2 { font-size: 1.6rem; }
            .featured-item { flex-wrap: wrap; }
            .featured-item .fi-meta { white-space: normal; }
            .section-header { margin-bottom: 32px; }
            .section-header h2 { font-size: 1.6rem; }
            .faq-item summary { padding: 14px 18px; font-size: 0.95rem; }
            .faq-item .faq-answer { padding: 0 18px 14px; }
            .breadcrumb { font-size: 0.78rem; }
        }

        @media (max-width: 520px) {
            .category-hero h1 { font-size: 1.6rem; }
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
            .stat-card { padding: 18px 12px; }
            .stat-card .stat-number { font-size: 1.5rem; }
            .tag-list { gap: 6px; }
            .tag-item { font-size: 0.8rem; padding: 4px 14px; }
            .cta-section h2 { font-size: 1.3rem; }
            .cta-section .btn-cta-light { padding: 12px 28px; font-size: 0.95rem; }
        }

        /* ===== Accessibility ===== */
        a:focus-visible, button:focus-visible, input:focus-visible {
            outline: 3px solid rgba(192, 57, 43, 0.5);
            outline-offset: 2px;
        }
        @media (prefers-reduced-motion: reduce) {
            *, *::before, *::after { transition: none !important; animation: none !important; }
        }

        /* ===== Skeleton / Loading ===== */
        .skeleton {
            background: linear-gradient(90deg, var(--border-light) 25%, #f0f0f0 50%, var(--border-light) 75%);
            background-size: 200% 100%;
            animation: shimmer 1.4s infinite;
            border-radius: var(--radius-sm);
        }
        @keyframes shimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }