/* roulang page: index */
:root {
            --color-primary: #0a2647;
            --color-primary-light: #14365c;
            --color-primary-dark: #061829;
            --color-accent: #c8903e;
            --color-accent-light: #dba855;
            --color-accent-dark: #a87830;
            --color-accent-soft: #fdf3e4;
            --color-bg: #f6f7f9;
            --color-bg-white: #ffffff;
            --color-bg-light: #f0f2f5;
            --color-bg-dark: #0d1b2e;
            --color-text: #1a1d23;
            --color-text-strong: #111318;
            --color-text-muted: #6b7280;
            --color-text-light: #9ca3af;
            --color-text-on-dark: #e8eaef;
            --color-border: #e2e5ea;
            --color-border-light: #eef0f3;
            --color-success: #10b981;
            --color-warning: #f59e0b;
            --color-error: #ef4444;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-full: 9999px;
            --shadow-xs: 0 1px 2px rgba(10, 38, 71, 0.04);
            --shadow-sm: 0 2px 8px rgba(10, 38, 71, 0.06);
            --shadow-md: 0 4px 16px rgba(10, 38, 71, 0.08);
            --shadow-lg: 0 8px 32px rgba(10, 38, 71, 0.10);
            --shadow-xl: 0 16px 48px rgba(10, 38, 71, 0.12);
            --shadow-card-hover: 0 12px 40px rgba(10, 38, 71, 0.14);
            --transition-fast: 0.2s ease;
            --transition-base: 0.3s ease;
            --transition-slow: 0.5s ease;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --container-max: 1200px;
            --container-narrow: 960px;
            --container-wide: 1320px;
            --nav-height: 72px;
            --section-gap: 80px;
            --section-gap-sm: 48px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
            font-size: 16px;
        }

        body {
            font-family: var(--font-sans);
            font-size: 1rem;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

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

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

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

        input,
        textarea {
            font-family: inherit;
            outline: none;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            color: var(--color-text-strong);
            font-weight: 700;
        }

        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        .container--narrow {
            max-width: var(--container-narrow);
        }

        .container--wide {
            max-width: var(--container-wide);
        }

        /* ========== HEADER / NAV ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--color-border-light);
            height: var(--nav-height);
            transition: box-shadow var(--transition-base);
        }

        .site-header.scrolled {
            box-shadow: var(--shadow-md);
        }

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

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--color-primary);
            letter-spacing: 0.5px;
            white-space: nowrap;
            transition: opacity var(--transition-fast);
        }

        .logo:hover {
            opacity: 0.85;
        }

        .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-md);
            background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.1rem;
            font-weight: 800;
            flex-shrink: 0;
        }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav-list a {
            display: inline-flex;
            align-items: center;
            padding: 10px 18px;
            border-radius: var(--radius-md);
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--color-text);
            transition: all var(--transition-fast);
            position: relative;
            white-space: nowrap;
        }

        .nav-list a:hover {
            color: var(--color-primary);
            background: rgba(10, 38, 71, 0.04);
        }

        .nav-list a.active {
            color: var(--color-primary);
            font-weight: 600;
            background: rgba(10, 38, 71, 0.06);
        }

        .nav-list a.nav-cta {
            background: var(--color-primary);
            color: #fff;
            padding: 10px 22px;
            border-radius: var(--radius-full);
            font-weight: 600;
            margin-left: 8px;
            transition: all var(--transition-fast);
        }

        .nav-list a.nav-cta:hover {
            background: var(--color-primary-light);
            color: #fff;
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            cursor: pointer;
            z-index: 1001;
        }

        .hamburger span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--color-primary);
            border-radius: 2px;
            transition: all var(--transition-fast);
        }

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

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

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

        /* ========== HERO ========== */
        .hero {
            position: relative;
            min-height: 620px;
            display: flex;
            align-items: center;
            background: var(--color-primary-dark) url('/assets/images/backpic/back-1.png') center / cover no-repeat;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 38, 71, 0.88) 0%, rgba(6, 24, 41, 0.78) 40%, rgba(10, 38, 71, 0.72) 100%);
            z-index: 1;
        }

        .hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 120px;
            background: linear-gradient(to top, var(--color-bg) 0%, transparent 100%);
            z-index: 2;
        }

        .hero-content {
            position: relative;
            z-index: 3;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 80px 24px 100px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
            width: 100%;
        }

        .hero-text {
            color: #fff;
        }

        .hero-badge {
            display: inline-block;
            background: rgba(200, 144, 62, 0.2);
            border: 1px solid rgba(200, 144, 62, 0.4);
            color: var(--color-accent-light);
            padding: 6px 16px;
            border-radius: var(--radius-full);
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 1px;
            margin-bottom: 20px;
            text-transform: uppercase;
        }

        .hero-title {
            font-size: 3rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 18px;
            line-height: 1.2;
            letter-spacing: -0.5px;
        }

        .hero-title .highlight {
            color: var(--color-accent-light);
            position: relative;
        }

        .hero-desc {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.82);
            margin-bottom: 32px;
            line-height: 1.7;
            max-width: 520px;
        }

        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition-fast);
            white-space: nowrap;
            letter-spacing: 0.3px;
        }

        .btn-primary {
            background: var(--color-accent);
            color: #fff;
            box-shadow: 0 4px 16px rgba(200, 144, 62, 0.3);
        }

        .btn-primary:hover {
            background: var(--color-accent-light);
            box-shadow: 0 6px 24px rgba(200, 144, 62, 0.4);
            transform: translateY(-2px);
        }

        .btn-outline {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.5);
        }

        .btn-outline:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.08);
            transform: translateY(-2px);
        }

        .btn-secondary {
            background: var(--color-primary);
            color: #fff;
        }

        .btn-secondary:hover {
            background: var(--color-primary-light);
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        .btn-sm {
            padding: 8px 18px;
            font-size: 0.85rem;
            border-radius: var(--radius-full);
        }

        .hero-visual {
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .hero-card-stack {
            position: relative;
            width: 100%;
            max-width: 440px;
            aspect-ratio: 4/3;
        }

        .hero-card-stack .stack-card {
            position: absolute;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-xl);
            border: 3px solid rgba(255, 255, 255, 0.25);
            transition: all var(--transition-slow);
        }

        .hero-card-stack .stack-card:nth-child(1) {
            top: 5%;
            left: 5%;
            width: 65%;
            z-index: 3;
            transform: rotate(-3deg);
        }

        .hero-card-stack .stack-card:nth-child(2) {
            top: 25%;
            right: 5%;
            width: 55%;
            z-index: 2;
            transform: rotate(5deg);
        }

        .hero-card-stack .stack-card:nth-child(3) {
            bottom: 5%;
            left: 15%;
            width: 50%;
            z-index: 1;
            transform: rotate(-1deg);
        }

        .hero-card-stack .stack-card img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* ========== SECTION COMMON ========== */
        .section {
            padding: var(--section-gap) 0;
        }

        .section--sm {
            padding: var(--section-gap-sm) 0;
        }

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

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

        .section--bg-dark .section-title,
        .section--bg-dark .section-subtitle {
            color: #fff;
        }

        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-label {
            display: inline-block;
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--color-accent);
            text-transform: uppercase;
            letter-spacing: 2px;
            margin-bottom: 10px;
        }

        .section-title {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }

        .section-subtitle {
            font-size: 1.05rem;
            color: var(--color-text-muted);
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.6;
        }

        /* ========== SERVICES GRID ========== */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .service-card {
            background: var(--color-bg-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
        }

        .service-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
            border-color: transparent;
        }

        .service-card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }

        .service-card-body {
            padding: 24px 22px 28px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .service-card-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-md);
            background: var(--color-accent-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-accent);
            font-size: 1.3rem;
            margin-bottom: 14px;
        }

        .service-card-title {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--color-text-strong);
        }

        .service-card-desc {
            font-size: 0.93rem;
            color: var(--color-text-muted);
            line-height: 1.6;
            flex: 1;
        }

        .service-card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--color-primary);
            margin-top: 14px;
            transition: gap var(--transition-fast);
        }

        .service-card-link:hover {
            gap: 10px;
            color: var(--color-accent);
        }

        /* ========== CATEGORY ENTRY ========== */
        .category-entry-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
            align-items: stretch;
        }

        .category-entry-card {
            background: var(--color-bg-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            display: flex;
            transition: all var(--transition-base);
            min-height: 220px;
        }

        .category-entry-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }

        .category-entry-card .card-img-wrap {
            width: 45%;
            flex-shrink: 0;
            overflow: hidden;
        }

        .category-entry-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .category-entry-card .card-body {
            padding: 28px 24px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .category-entry-card .card-tag {
            display: inline-block;
            background: var(--color-accent-soft);
            color: var(--color-accent-dark);
            padding: 4px 12px;
            border-radius: var(--radius-full);
            font-size: 0.8rem;
            font-weight: 700;
            margin-bottom: 10px;
            width: fit-content;
        }

        .category-entry-card .card-title {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 6px;
        }

        .category-entry-card .card-desc {
            font-size: 0.9rem;
            color: var(--color-text-muted);
        }

        /* ========== NEWS LIST ========== */
        .news-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .news-item {
            background: var(--color-bg-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
        }

        .news-item:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }

        .news-item-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }

        .news-item-body {
            padding: 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .news-item-meta {
            display: flex;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--color-text-muted);
            margin-bottom: 8px;
        }

        .news-item-meta .news-category {
            color: var(--color-accent);
            font-weight: 600;
        }

        .news-item-title {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-item-title a {
            color: var(--color-text-strong);
            transition: color var(--transition-fast);
        }

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

        .news-item-desc {
            font-size: 0.88rem;
            color: var(--color-text-muted);
            line-height: 1.6;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 48px;
            background: var(--color-bg-white);
            border-radius: var(--radius-lg);
            color: var(--color-text-muted);
            font-size: 1rem;
            border: 2px dashed var(--color-border);
        }

        /* ========== STATS ========== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .stat-card {
            text-align: center;
            padding: 32px 20px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-lg);
            border: 1px solid rgba(255, 255, 255, 0.1);
            transition: all var(--transition-base);
        }

        .stat-card:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-2px);
        }

        .stat-number {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--color-accent-light);
            margin-bottom: 6px;
            letter-spacing: -1px;
        }

        .stat-label {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.7);
            font-weight: 500;
        }

        /* ========== PROCESS ========== */
        .process-list {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: process;
        }

        .process-item {
            position: relative;
            background: var(--color-bg-white);
            border-radius: var(--radius-lg);
            padding: 32px 22px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            text-align: center;
            transition: all var(--transition-base);
            counter-increment: process;
        }

        .process-item::before {
            content: counter(process);
            position: absolute;
            top: -20px;
            left: 50%;
            transform: translateX(-50%);
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--color-primary);
            color: #fff;
            font-weight: 800;
            font-size: 1.1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: var(--shadow-md);
            z-index: 2;
        }

        .process-item:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }

        .process-icon {
            font-size: 2rem;
            color: var(--color-accent);
            margin-bottom: 12px;
            margin-top: 6px;
        }

        .process-title {
            font-weight: 700;
            font-size: 1rem;
            margin-bottom: 6px;
        }

        .process-desc {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            line-height: 1.5;
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--color-bg-white);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border-light);
            overflow: hidden;
            transition: all var(--transition-fast);
        }

        .faq-item.active {
            border-color: var(--color-primary);
            box-shadow: var(--shadow-md);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--color-text-strong);
            text-align: left;
            background: none;
            cursor: pointer;
            transition: color var(--transition-fast);
            gap: 16px;
        }

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

        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--color-bg-light);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all var(--transition-fast);
            font-size: 0.75rem;
            color: var(--color-text-muted);
        }

        .faq-item.active .faq-icon {
            background: var(--color-primary);
            color: #fff;
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-base), padding var(--transition-base);
            padding: 0 22px;
            font-size: 0.93rem;
            color: var(--color-text-muted);
            line-height: 1.7;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 22px 20px;
        }

        /* ========== CTA ========== */
        .cta-section {
            background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
            text-align: center;
            padding: 64px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -20%;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: rgba(200, 144, 62, 0.08);
            pointer-events: none;
        }

        .cta-section .container {
            position: relative;
            z-index: 1;
        }

        .cta-title {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
        }

        .cta-desc {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.78);
            margin-bottom: 28px;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }

        .cta-actions {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn-light {
            background: #fff;
            color: var(--color-primary);
            font-weight: 700;
        }

        .btn-light:hover {
            background: #f0f0f0;
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--color-bg-dark);
            color: var(--color-text-on-dark);
            padding: 48px 0 28px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 36px;
        }

        .footer-brand .footer-logo {
            font-size: 1.3rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
            display: block;
        }

        .footer-brand p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.6;
            max-width: 280px;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }

        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-col ul a {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.6);
            transition: color var(--transition-fast);
        }

        .footer-col ul a:hover {
            color: var(--color-accent-light);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 20px;
            text-align: center;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.45);
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .hero-content {
                grid-template-columns: 1fr;
                gap: 32px;
                text-align: center;
            }
            .hero-desc {
                max-width: 100%;
                margin-left: auto;
                margin-right: auto;
            }
            .hero-actions {
                justify-content: center;
            }
            .hero-card-stack {
                max-width: 340px;
                margin: 0 auto;
            }
            .hero-title {
                font-size: 2.4rem;
            }
            .services-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-list {
                grid-template-columns: repeat(2, 1fr);
            }
            .category-entry-grid {
                grid-template-columns: 1fr;
            }
            .news-list {
                grid-template-columns: 1fr 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .section-title {
                font-size: 1.8rem;
            }
        }

        @media (max-width: 768px) {
            :root {
                --nav-height: 64px;
                --section-gap: 56px;
                --section-gap-sm: 36px;
            }
            .hamburger {
                display: flex;
            }
            .nav-list {
                position: fixed;
                top: 0;
                right: -100%;
                width: 75%;
                max-width: 360px;
                height: 100vh;
                flex-direction: column;
                background: #fff;
                padding: 90px 28px 40px;
                gap: 4px;
                box-shadow: var(--shadow-xl);
                transition: right var(--transition-base);
                z-index: 999;
                align-items: stretch;
            }
            .nav-list.open {
                right: 0;
            }
            .nav-list a {
                padding: 14px 18px;
                font-size: 1rem;
                border-radius: var(--radius-md);
            }
            .nav-list a.nav-cta {
                margin-left: 0;
                text-align: center;
                justify-content: center;
                margin-top: 8px;
            }
            .hero {
                min-height: 480px;
            }
            .hero-content {
                padding: 50px 20px 70px;
            }
            .hero-title {
                font-size: 2rem;
            }
            .hero-desc {
                font-size: 1rem;
            }
            .hero-card-stack {
                max-width: 280px;
            }
            .services-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .process-list {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            .process-item {
                padding-top: 28px;
            }
            .process-item::before {
                top: -16px;
                width: 34px;
                height: 34px;
                font-size: 0.95rem;
            }
            .news-list {
                grid-template-columns: 1fr;
            }
            .category-entry-card {
                flex-direction: column;
            }
            .category-entry-card .card-img-wrap {
                width: 100%;
                height: 180px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .btn {
                padding: 12px 24px;
                font-size: 0.9rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .hero {
                min-height: 420px;
            }
            .hero-content {
                padding: 36px 16px 56px;
            }
            .hero-title {
                font-size: 1.65rem;
            }
            .hero-desc {
                font-size: 0.9rem;
            }
            .hero-badge {
                font-size: 0.75rem;
                padding: 5px 12px;
            }
            .hero-card-stack {
                max-width: 220px;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .hero-actions .btn {
                width: 100%;
                justify-content: center;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-card {
                padding: 24px 14px;
            }
            .stat-number {
                font-size: 2rem;
            }
            .process-list {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .section-header {
                margin-bottom: 32px;
            }
            .cta-title {
                font-size: 1.5rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .nav-list {
                width: 85%;
                padding: 80px 20px 30px;
            }
        }

        /* ========== ANIMATIONS ========== */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(24px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .animate-on-scroll {
            animation: fadeInUp 0.6s ease forwards;
        }

        /* ========== MOBILE OVERLAY ========== */
        .nav-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.4);
            z-index: 998;
        }
        .nav-overlay.show {
            display: block;
        }

/* roulang page: article */
:root {
            --color-primary: #1a3a5c;
            --color-primary-hover: #152e4a;
            --color-accent: #c9a962;
            --color-accent-hover: #b8943e;
            --color-bg: #fafaf9;
            --color-surface: #ffffff;
            --color-text: #1c2331;
            --color-text-weak: #6b7280;
            --color-text-muted: #9ca3af;
            --color-border: #e5e7eb;
            --color-border-light: #f0f0ed;
            --color-success: #15803d;
            --color-tag-bg: #f3f4f6;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.07), 0 2px 6px rgba(0, 0, 0, 0.04);
            --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.08), 0 4px 12px rgba(0, 0, 0, 0.04);
            --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.1), 0 8px 20px rgba(0, 0, 0, 0.05);
            --transition-fast: 0.18s ease;
            --transition-base: 0.28s ease;
            --transition-slow: 0.4s ease;
            --font-sans: 'Inter', 'SF Pro Display', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
            --font-serif: 'Georgia', 'Noto Serif SC', 'Source Han Serif SC', 'Songti SC', serif;
            --container-max: 1140px;
            --container-narrow: 780px;
            --header-height: 72px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

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

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

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

        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }

        ul {
            list-style: none;
        }

        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .container-narrow {
            max-width: var(--container-narrow);
        }

        /* Header & Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--color-border-light);
            height: var(--header-height);
            transition: box-shadow var(--transition-base);
        }

        .site-header.scrolled {
            box-shadow: var(--shadow-md);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
            gap: 20px;
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.35rem;
            color: var(--color-primary);
            letter-spacing: -0.3px;
            white-space: nowrap;
            transition: opacity var(--transition-fast);
        }

        .logo-link:hover {
            opacity: 0.82;
        }

        .logo-icon {
            width: 38px;
            height: 38px;
            background: var(--color-primary);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.1rem;
            font-weight: 800;
            flex-shrink: 0;
        }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .nav-list a {
            display: inline-flex;
            align-items: center;
            padding: 9px 18px;
            border-radius: var(--radius-md);
            font-weight: 500;
            font-size: 0.93rem;
            color: var(--color-text-weak);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .nav-list a:hover {
            color: var(--color-primary);
            background: rgba(26, 58, 92, 0.05);
        }

        .nav-list a.active {
            color: var(--color-primary);
            background: rgba(26, 58, 92, 0.08);
            font-weight: 600;
        }

        .nav-cta {
            background: var(--color-accent) !important;
            color: #fff !important;
            font-weight: 600 !important;
            padding: 10px 22px !important;
            border-radius: var(--radius-md) !important;
            transition: all var(--transition-base) !important;
            box-shadow: 0 2px 8px rgba(201, 169, 98, 0.25);
        }

        .nav-cta:hover {
            background: var(--color-accent-hover) !important;
            box-shadow: 0 4px 16px rgba(201, 169, 98, 0.35);
            transform: translateY(-1px);
        }

        .mobile-toggle {
            display: none;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            color: var(--color-text);
            font-size: 1.4rem;
            transition: all var(--transition-fast);
        }

        .mobile-toggle:hover {
            background: var(--color-border-light);
        }

        .mobile-toggle:focus {
            outline: 2px solid var(--color-primary);
            outline-offset: 2px;
        }

        /* Article Page Layout */
        .article-page {
            flex: 1;
            padding-top: 40px;
            padding-bottom: 80px;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
            font-size: 0.875rem;
            color: var(--color-text-muted);
            margin-bottom: 28px;
        }

        .breadcrumb a {
            color: var(--color-text-weak);
            transition: color var(--transition-fast);
        }

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

        .breadcrumb .separator {
            color: var(--color-border);
            user-select: none;
        }

        .breadcrumb .current {
            color: var(--color-text);
            font-weight: 500;
        }

        .article-header {
            margin-bottom: 36px;
        }

        .article-category-tag {
            display: inline-flex;
            align-items: center;
            padding: 6px 16px;
            background: var(--color-tag-bg);
            color: var(--color-primary);
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.4px;
            margin-bottom: 16px;
            transition: all var(--transition-fast);
        }

        .article-category-tag:hover {
            background: rgba(26, 58, 92, 0.12);
        }

        .article-title {
            font-size: 2.2rem;
            font-weight: 800;
            line-height: 1.3;
            color: var(--color-primary);
            letter-spacing: -0.5px;
            margin-bottom: 16px;
        }

        .article-meta {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
            font-size: 0.9rem;
            color: var(--color-text-weak);
            padding-bottom: 24px;
            border-bottom: 1px solid var(--color-border-light);
        }

        .article-meta span {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .article-meta .meta-icon {
            font-size: 1rem;
            opacity: 0.7;
        }

        .article-featured-image {
            width: 100%;
            border-radius: var(--radius-lg);
            overflow: hidden;
            margin-bottom: 40px;
            box-shadow: var(--shadow-lg);
        }

        .article-featured-image img {
            width: 100%;
            height: auto;
            object-fit: cover;
            aspect-ratio: 16 / 9;
        }

        .article-body {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--color-text);
        }

        .article-body h2 {
            font-size: 1.55rem;
            font-weight: 700;
            color: var(--color-primary);
            margin-top: 36px;
            margin-bottom: 16px;
            padding-left: 16px;
            border-left: 4px solid var(--color-accent);
        }

        .article-body h3 {
            font-size: 1.25rem;
            font-weight: 600;
            color: var(--color-text);
            margin-top: 28px;
            margin-bottom: 12px;
        }

        .article-body p {
            margin-bottom: 18px;
            text-align: justify;
        }

        .article-body ul,
        .article-body ol {
            margin-bottom: 20px;
            padding-left: 24px;
        }

        .article-body ul {
            list-style: disc;
        }

        .article-body ol {
            list-style: decimal;
        }

        .article-body li {
            margin-bottom: 8px;
        }

        .article-body blockquote {
            margin: 28px 0;
            padding: 20px 28px;
            background: #f8f7f4;
            border-left: 4px solid var(--color-accent);
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            font-style: italic;
            color: var(--color-text-weak);
            font-size: 1rem;
        }

        .article-body img {
            border-radius: var(--radius-md);
            margin: 24px 0;
            box-shadow: var(--shadow-md);
        }

        .article-body strong {
            color: var(--color-primary);
            font-weight: 600;
        }

        .article-body a {
            color: var(--color-primary);
            text-decoration: underline;
            text-underline-offset: 3px;
            transition: color var(--transition-fast);
        }

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

        /* Article Footer */
        .article-footer {
            margin-top: 48px;
            padding-top: 32px;
            border-top: 1px solid var(--color-border-light);
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
        }

        .article-tags {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
        }

        .article-tags .tag-label {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            font-weight: 500;
        }

        .article-tags .tag {
            display: inline-block;
            padding: 5px 14px;
            background: var(--color-tag-bg);
            color: var(--color-text-weak);
            border-radius: 50px;
            font-size: 0.8rem;
            transition: all var(--transition-fast);
        }

        .article-tags .tag:hover {
            background: rgba(26, 58, 92, 0.1);
            color: var(--color-primary);
        }

        .article-share {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .article-share .share-label {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            font-weight: 500;
        }

        .share-btn {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--color-tag-bg);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.9rem;
            color: var(--color-text-weak);
            transition: all var(--transition-fast);
        }

        .share-btn:hover {
            background: var(--color-primary);
            color: #fff;
            transform: translateY(-2px);
        }

        /* Related Articles */
        .related-section {
            margin-top: 60px;
        }

        .section-label {
            font-size: 0.8rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1.5px;
            color: var(--color-accent);
            margin-bottom: 8px;
        }

        .section-title {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 32px;
            letter-spacing: -0.3px;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .related-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-base);
            box-shadow: var(--shadow-sm);
        }

        .related-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
        }

        .related-card-img {
            width: 100%;
            aspect-ratio: 16 / 10;
            overflow: hidden;
        }

        .related-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

        .related-card:hover .related-card-img img {
            transform: scale(1.04);
        }

        .related-card-body {
            padding: 20px;
        }

        .related-card-category {
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--color-accent);
            letter-spacing: 0.5px;
            margin-bottom: 8px;
        }

        .related-card-title {
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-primary);
            line-height: 1.45;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: color var(--transition-fast);
        }

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

        .related-card-date {
            font-size: 0.8rem;
            color: var(--color-text-muted);
        }

        /* Not Found State */
        .not-found {
            text-align: center;
            padding: 80px 20px;
        }

        .not-found-icon {
            font-size: 4rem;
            margin-bottom: 20px;
            opacity: 0.4;
        }

        .not-found h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 12px;
        }

        .not-found p {
            color: var(--color-text-weak);
            margin-bottom: 28px;
            font-size: 1rem;
        }

        .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            background: var(--color-primary);
            color: #fff;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition-base);
            box-shadow: var(--shadow-md);
        }

        .btn-back:hover {
            background: var(--color-primary-hover);
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
        }

        .btn-back:focus {
            outline: 2px solid var(--color-primary);
            outline-offset: 3px;
        }

        /* Footer */
        .site-footer {
            background: #1c2331;
            color: #cbd5e1;
            padding: 56px 0 0;
            margin-top: auto;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-logo {
            font-size: 1.3rem;
            font-weight: 700;
            color: #fff;
            display: block;
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }

        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.6;
            color: #94a3b8;
            max-width: 280px;
        }

        .footer-col h4 {
            font-size: 0.85rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: #fff;
            margin-bottom: 18px;
        }

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

        .footer-col ul li a {
            font-size: 0.9rem;
            color: #94a3b8;
            transition: color var(--transition-fast);
        }

        .footer-col ul li a:hover {
            color: var(--color-accent);
        }

        .footer-bottom {
            text-align: center;
            padding: 24px 0;
            font-size: 0.82rem;
            color: #64748b;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .container {
                padding-left: 20px;
                padding-right: 20px;
            }

            .article-title {
                font-size: 1.8rem;
            }

            .article-body {
                font-size: 1rem;
            }

            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .nav-list {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.97);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 20px;
                gap: 4px;
                border-bottom: 1px solid var(--color-border-light);
                box-shadow: var(--shadow-lg);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: all var(--transition-base);
                z-index: 99;
            }

            .nav-list.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }

            .nav-list a {
                width: 100%;
                padding: 12px 16px;
                font-size: 0.95rem;
            }

            .mobile-toggle {
                display: flex;
            }

            .article-title {
                font-size: 1.5rem;
            }

            .article-body h2 {
                font-size: 1.3rem;
            }

            .article-body h3 {
                font-size: 1.1rem;
            }

            .article-footer {
                flex-direction: column;
                align-items: flex-start;
            }

            .related-grid {
                grid-template-columns: 1fr;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .article-page {
                padding-top: 24px;
                padding-bottom: 48px;
            }
        }

        @media (max-width: 520px) {
            .header-inner {
                gap: 12px;
            }

            .logo-link {
                font-size: 1.15rem;
            }

            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 0.9rem;
            }

            .article-title {
                font-size: 1.3rem;
            }

            .article-meta {
                font-size: 0.8rem;
                gap: 12px;
            }

            .article-body {
                font-size: 0.95rem;
            }

            .section-title {
                font-size: 1.3rem;
            }

            .not-found h2 {
                font-size: 1.4rem;
            }
        }

/* roulang page: category1 */
:root {
            --color-primary: #1a56db;
            --color-primary-dark: #1347b8;
            --color-primary-light: #e8f0fe;
            --color-accent: #f59e0b;
            --color-accent-dark: #d97706;
            --color-bg: #f8fafc;
            --color-surface: #ffffff;
            --color-text: #1e293b;
            --color-text-secondary: #64748b;
            --color-text-muted: #94a3b8;
            --color-border: #e2e8f0;
            --color-border-light: #f1f5f9;
            --color-success: #10b981;
            --color-warning: #f59e0b;
            --color-error: #ef4444;
            --radius-sm: 0.375rem;
            --radius-md: 0.5rem;
            --radius-lg: 0.75rem;
            --radius-xl: 1rem;
            --radius-2xl: 1.25rem;
            --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.1);
            --shadow-xl: 0 20px 48px rgba(0, 0, 0, 0.12);
            --space-xs: 0.5rem;
            --space-sm: 0.75rem;
            --space-md: 1rem;
            --space-lg: 1.5rem;
            --space-xl: 2rem;
            --space-2xl: 2.5rem;
            --space-3xl: 3rem;
            --space-4xl: 4rem;
            --space-5xl: 5rem;
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', 'Consolas', monospace;
            --transition-fast: 0.15s ease;
            --transition-base: 0.25s ease;
            --transition-slow: 0.35s ease;
            --max-width: 1200px;
            --header-height: 72px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

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

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

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

        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--color-text);
        }

        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding-left: var(--space-xl);
            padding-right: var(--space-xl);
        }

        /* ========== HEADER & NAV ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: var(--color-surface);
            border-bottom: 1px solid var(--color-border);
            box-shadow: var(--shadow-sm);
            height: var(--header-height);
            display: flex;
            align-items: center;
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }

        .logo-wrap {
            display: flex;
            align-items: center;
        }

        .logo-text {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--color-primary);
            letter-spacing: -0.02em;
            white-space: nowrap;
            transition: opacity var(--transition-fast);
        }

        .logo-text:hover {
            opacity: 0.85;
        }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 0.25rem;
        }

        .nav-list a {
            display: inline-flex;
            align-items: center;
            padding: 0.55rem 1.1rem;
            border-radius: var(--radius-lg);
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--color-text-secondary);
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }

        .nav-list a:hover {
            color: var(--color-primary);
            background: var(--color-primary-light);
        }

        .nav-list a.active {
            color: var(--color-primary);
            background: var(--color-primary-light);
            font-weight: 700;
        }

        .nav-list a.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 50%;
            transform: translateX(-50%);
            width: 60%;
            height: 3px;
            background: var(--color-primary);
            border-radius: 3px 3px 0 0;
        }

        .nav-cta {
            background: var(--color-primary) !important;
            color: #ffffff !important;
            padding: 0.55rem 1.4rem !important;
            border-radius: var(--radius-xl) !important;
            font-weight: 700 !important;
            box-shadow: 0 2px 8px rgba(26, 86, 219, 0.25);
            transition: all var(--transition-base) !important;
        }

        .nav-cta:hover {
            background: var(--color-primary-dark) !important;
            color: #ffffff !important;
            box-shadow: 0 4px 16px rgba(26, 86, 219, 0.35) !important;
            transform: translateY(-1px);
        }

        .burger-btn {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: var(--radius-md);
            transition: background var(--transition-fast);
            z-index: 1001;
        }

        .burger-btn:hover {
            background: var(--color-primary-light);
        }

        .burger-line {
            width: 24px;
            height: 2.5px;
            background: var(--color-text);
            border-radius: 2px;
            transition: all var(--transition-base);
        }

        .burger-btn.open .burger-line:nth-child(1) {
            transform: translateY(7.5px) rotate(45deg);
        }

        .burger-btn.open .burger-line:nth-child(2) {
            opacity: 0;
        }

        .burger-btn.open .burger-line:nth-child(3) {
            transform: translateY(-7.5px) rotate(-45deg);
        }

        /* ========== PAGE BANNER ========== */
        .page-banner {
            position: relative;
            padding: var(--space-5xl) 0 var(--space-4xl);
            background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 40%, #1a56db 100%);
            color: #ffffff;
            overflow: hidden;
            z-index: 1;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.18;
            z-index: 0;
        }

        .page-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 70% 30%, rgba(26, 86, 219, 0.35) 0%, transparent 60%);
            z-index: 0;
        }

        .page-banner .container {
            position: relative;
            z-index: 1;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: var(--space-lg);
        }

        .breadcrumb a {
            color: rgba(255, 255, 255, 0.85);
            transition: color var(--transition-fast);
        }

        .breadcrumb a:hover {
            color: #ffffff;
        }

        .breadcrumb .sep {
            color: rgba(255, 255, 255, 0.4);
            font-size: 0.75rem;
        }

        .breadcrumb .current {
            color: #ffffff;
            font-weight: 600;
        }

        .page-banner-title {
            font-size: 2.6rem;
            font-weight: 800;
            letter-spacing: -0.03em;
            margin-bottom: var(--space-md);
            line-height: 1.2;
            color: #ffffff;
        }

        .page-banner-desc {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 640px;
            line-height: 1.6;
        }

        .banner-stats {
            display: flex;
            gap: var(--space-3xl);
            margin-top: var(--space-xl);
            flex-wrap: wrap;
        }

        .banner-stat-item {
            display: flex;
            flex-direction: column;
        }

        .banner-stat-num {
            font-size: 2rem;
            font-weight: 800;
            color: #ffffff;
            letter-spacing: -0.02em;
        }

        .banner-stat-label {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 2px;
        }

        /* ========== MAIN CONTENT AREA ========== */
        .main-content {
            flex: 1;
            padding: var(--space-4xl) 0 var(--space-5xl);
        }

        .content-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: var(--space-3xl);
            align-items: start;
        }

        /* ========== FILTER BAR ========== */
        .filter-bar {
            display: flex;
            align-items: center;
            gap: var(--space-sm);
            flex-wrap: wrap;
            margin-bottom: var(--space-2xl);
            padding-bottom: var(--space-lg);
            border-bottom: 2px solid var(--color-border-light);
        }

        .filter-label {
            font-weight: 700;
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            margin-right: var(--space-sm);
            white-space: nowrap;
        }

        .filter-tag {
            display: inline-flex;
            align-items: center;
            padding: 0.45rem 1rem;
            border-radius: var(--radius-xl);
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--color-text-secondary);
            background: var(--color-surface);
            border: 1.5px solid var(--color-border);
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
            user-select: none;
        }

        .filter-tag:hover {
            border-color: var(--color-primary);
            color: var(--color-primary);
            background: var(--color-primary-light);
        }

        .filter-tag.active-filter {
            background: var(--color-primary);
            color: #ffffff;
            border-color: var(--color-primary);
            font-weight: 700;
        }

        .filter-count {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 20px;
            height: 20px;
            padding: 0 6px;
            border-radius: 10px;
            font-size: 0.75rem;
            font-weight: 700;
            margin-left: 6px;
            background: rgba(0, 0, 0, 0.08);
        }

        .filter-tag.active-filter .filter-count {
            background: rgba(255, 255, 255, 0.25);
        }

        /* ========== ARTICLE LIST ========== */
        .article-list {
            display: flex;
            flex-direction: column;
            gap: var(--space-xl);
        }

        .article-card {
            display: grid;
            grid-template-columns: 280px 1fr;
            gap: var(--space-xl);
            background: var(--color-surface);
            border-radius: var(--radius-xl);
            padding: var(--space-lg);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
        }

        .article-card:hover {
            box-shadow: var(--shadow-lg);
            border-color: var(--color-primary);
            transform: translateY(-2px);
        }

        .article-card-img-wrap {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            aspect-ratio: 4 / 3;
            background: var(--color-border-light);
            flex-shrink: 0;
        }

        .article-card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

        .article-card:hover .article-card-img-wrap img {
            transform: scale(1.06);
        }

        .article-card-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            padding: 0.3rem 0.75rem;
            border-radius: var(--radius-xl);
            font-size: 0.78rem;
            font-weight: 700;
            background: var(--color-primary);
            color: #ffffff;
            z-index: 2;
            letter-spacing: 0.02em;
        }

        .article-card-body {
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            min-width: 0;
        }

        .article-card-meta {
            display: flex;
            align-items: center;
            gap: var(--space-md);
            font-size: 0.85rem;
            color: var(--color-text-muted);
            margin-bottom: var(--space-sm);
            flex-wrap: wrap;
        }

        .article-card-meta .meta-dot {
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background: var(--color-text-muted);
        }

        .article-card-title {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: var(--space-sm);
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: color var(--transition-fast);
        }

        .article-card:hover .article-card-title {
            color: var(--color-primary);
        }

        .article-card-excerpt {
            font-size: 0.93rem;
            color: var(--color-text-secondary);
            line-height: 1.65;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: var(--space-md);
        }

        .article-card-tags {
            display: flex;
            gap: 0.4rem;
            flex-wrap: wrap;
            margin-bottom: var(--space-sm);
        }

        .article-tag {
            display: inline-block;
            padding: 0.25rem 0.65rem;
            border-radius: var(--radius-sm);
            font-size: 0.78rem;
            font-weight: 600;
            background: var(--color-primary-light);
            color: var(--color-primary);
            white-space: nowrap;
        }

        .article-card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--space-md);
        }

        .article-read-more {
            font-weight: 700;
            font-size: 0.9rem;
            color: var(--color-primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap var(--transition-fast);
        }

        .article-read-more:hover {
            gap: 8px;
        }

        .article-read-more .arrow {
            transition: transform var(--transition-fast);
            font-size: 1.1rem;
        }

        .article-read-more:hover .arrow {
            transform: translateX(3px);
        }

        /* ========== SIDEBAR ========== */
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: var(--space-xl);
            position: sticky;
            top: calc(var(--header-height) + var(--space-xl));
        }

        .sidebar-card {
            background: var(--color-surface);
            border-radius: var(--radius-xl);
            padding: var(--space-xl);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-sm);
        }

        .sidebar-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: var(--space-lg);
            padding-bottom: var(--space-sm);
            border-bottom: 2px solid var(--color-primary-light);
            color: var(--color-text);
        }

        .sidebar-hot-list {
            display: flex;
            flex-direction: column;
            gap: var(--space-md);
        }

        .sidebar-hot-item {
            display: flex;
            gap: var(--space-md);
            padding: var(--space-sm) 0;
            border-bottom: 1px solid var(--color-border-light);
            transition: all var(--transition-fast);
            cursor: pointer;
        }

        .sidebar-hot-item:last-child {
            border-bottom: none;
        }

        .sidebar-hot-item:hover .sidebar-hot-title {
            color: var(--color-primary);
        }

        .sidebar-hot-rank {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--color-primary);
            opacity: 0.3;
            line-height: 1;
            flex-shrink: 0;
            width: 28px;
            text-align: center;
        }

        .sidebar-hot-item:nth-child(1) .sidebar-hot-rank,
        .sidebar-hot-item:nth-child(2) .sidebar-hot-rank,
        .sidebar-hot-item:nth-child(3) .sidebar-hot-rank {
            opacity: 1;
            color: var(--color-accent);
        }

        .sidebar-hot-title {
            font-size: 0.9rem;
            font-weight: 600;
            line-height: 1.4;
            transition: color var(--transition-fast);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .sidebar-hot-date {
            font-size: 0.78rem;
            color: var(--color-text-muted);
            margin-top: 2px;
        }

        .sidebar-tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
        }

        .sidebar-tag-cloud .article-tag {
            cursor: pointer;
            transition: all var(--transition-fast);
            font-size: 0.8rem;
            padding: 0.35rem 0.8rem;
        }

        .sidebar-tag-cloud .article-tag:hover {
            background: var(--color-primary);
            color: #ffffff;
        }

        .sidebar-cta-box {
            background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
            color: #ffffff;
            border: none;
            text-align: center;
        }

        .sidebar-cta-box h3 {
            color: #ffffff;
            border-bottom-color: rgba(255, 255, 255, 0.25);
        }

        .sidebar-cta-box p {
            font-size: 0.9rem;
            opacity: 0.9;
            margin-bottom: var(--space-lg);
            line-height: 1.6;
        }

        .sidebar-cta-btn {
            display: inline-block;
            padding: 0.65rem 1.5rem;
            border-radius: var(--radius-xl);
            font-weight: 700;
            font-size: 0.95rem;
            background: #ffffff;
            color: var(--color-primary);
            transition: all var(--transition-base);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
        }

        .sidebar-cta-btn:hover {
            background: var(--color-accent);
            color: #ffffff;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
        }

        /* ========== PAGINATION ========== */
        .pagination {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 0.35rem;
            margin-top: var(--space-3xl);
            flex-wrap: wrap;
        }

        .pagination a,
        .pagination span {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 40px;
            height: 40px;
            padding: 0 0.5rem;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.9rem;
            transition: all var(--transition-fast);
            background: var(--color-surface);
            border: 1.5px solid var(--color-border);
            color: var(--color-text-secondary);
            cursor: pointer;
            user-select: none;
        }

        .pagination a:hover {
            border-color: var(--color-primary);
            color: var(--color-primary);
            background: var(--color-primary-light);
        }

        .pagination .active-page {
            background: var(--color-primary);
            color: #ffffff;
            border-color: var(--color-primary);
            font-weight: 700;
            cursor: default;
        }

        .pagination .page-dots {
            border: none;
            background: transparent;
            cursor: default;
            color: var(--color-text-muted);
        }

        /* ========== CTA SECTION ========== */
        .cta-section {
            background: var(--color-surface);
            border-top: 1px solid var(--color-border);
            padding: var(--space-4xl) 0;
            margin-top: var(--space-4xl);
        }

        .cta-inner {
            background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 50%, #1a56db 100%);
            border-radius: var(--radius-2xl);
            padding: var(--space-4xl) var(--space-3xl);
            text-align: center;
            color: #ffffff;
            position: relative;
            overflow: hidden;
        }

        .cta-inner::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            opacity: 0.12;
            z-index: 0;
        }

        .cta-inner>* {
            position: relative;
            z-index: 1;
        }

        .cta-inner h2 {
            font-size: 2rem;
            font-weight: 800;
            color: #ffffff;
            margin-bottom: var(--space-md);
            letter-spacing: -0.02em;
        }

        .cta-inner p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 600px;
            margin: 0 auto var(--space-xl);
            line-height: 1.6;
        }

        .cta-btn-group {
            display: flex;
            gap: var(--space-md);
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.75rem 1.8rem;
            border-radius: var(--radius-xl);
            font-weight: 700;
            font-size: 1rem;
            transition: all var(--transition-base);
            white-space: nowrap;
        }

        .btn-primary {
            background: #ffffff;
            color: var(--color-primary);
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
        }

        .btn-primary:hover {
            background: var(--color-accent);
            color: #ffffff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
        }

        .btn-outline-light {
            background: transparent;
            color: #ffffff;
            border: 2px solid rgba(255, 255, 255, 0.5);
        }

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

        /* ========== FOOTER ========== */
        .site-footer {
            background: #0f172a;
            color: #cbd5e1;
            padding: var(--space-4xl) 0 var(--space-xl);
            margin-top: auto;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: var(--space-3xl);
            margin-bottom: var(--space-3xl);
        }

        .footer-logo {
            font-size: 1.3rem;
            font-weight: 800;
            color: #ffffff;
            display: block;
            margin-bottom: var(--space-md);
            letter-spacing: -0.02em;
        }

        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: #94a3b8;
        }

        .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: var(--space-lg);
        }

        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 0.55rem;
        }

        .footer-col ul li a {
            font-size: 0.9rem;
            color: #94a3b8;
            transition: all var(--transition-fast);
        }

        .footer-col ul li a:hover {
            color: #ffffff;
            padding-left: 4px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: var(--space-xl);
            text-align: center;
            font-size: 0.85rem;
            color: #64748b;
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .container {
                padding-left: var(--space-lg);
                padding-right: var(--space-lg);
            }

            .content-layout {
                grid-template-columns: 1fr;
                gap: var(--space-2xl);
            }

            .sidebar {
                position: static;
                display: grid;
                grid-template-columns: repeat(2, 1fr);
                gap: var(--space-lg);
            }

            .article-card {
                grid-template-columns: 220px 1fr;
                gap: var(--space-lg);
            }

            .page-banner-title {
                font-size: 2.2rem;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--space-2xl);
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 64px;
            }

            .container {
                padding-left: var(--space-md);
                padding-right: var(--space-md);
            }

            .burger-btn {
                display: flex;
            }

            .nav-list {
                position: fixed;
                top: 0;
                right: -100%;
                width: 280px;
                height: 100vh;
                background: var(--color-surface);
                flex-direction: column;
                padding: 5rem var(--space-xl) var(--space-2xl);
                gap: 0.15rem;
                box-shadow: var(--shadow-xl);
                transition: right var(--transition-slow);
                z-index: 1000;
                align-items: stretch;
            }

            .nav-list.open {
                right: 0;
            }

            .nav-list a {
                padding: 0.7rem 1rem;
                border-radius: var(--radius-md);
                font-size: 1rem;
            }

            .nav-list a.active::after {
                display: none;
            }

            .nav-cta {
                text-align: center;
                justify-content: center;
                margin-top: var(--space-md);
            }

            .mobile-overlay {
                display: none;
                position: fixed;
                inset: 0;
                background: rgba(0, 0, 0, 0.5);
                z-index: 999;
            }

            .mobile-overlay.open {
                display: block;
            }

            .article-card {
                grid-template-columns: 1fr;
                gap: var(--space-md);
            }

            .article-card-img-wrap {
                aspect-ratio: 16 / 9;
            }

            .page-banner {
                padding: var(--space-3xl) 0 var(--space-2xl);
            }

            .page-banner-title {
                font-size: 1.8rem;
            }

            .page-banner-desc {
                font-size: 1rem;
            }

            .banner-stats {
                gap: var(--space-xl);
            }

            .banner-stat-num {
                font-size: 1.5rem;
            }

            .filter-bar {
                gap: 0.4rem;
            }

            .filter-tag {
                padding: 0.35rem 0.7rem;
                font-size: 0.8rem;
            }

            .sidebar {
                grid-template-columns: 1fr;
            }

            .cta-inner {
                padding: var(--space-2xl) var(--space-xl);
            }

            .cta-inner h2 {
                font-size: 1.5rem;
            }

            .cta-btn-group {
                flex-direction: column;
                align-items: center;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: var(--space-xl);
            }

            .pagination a,
            .pagination span {
                min-width: 34px;
                height: 34px;
                font-size: 0.82rem;
            }
        }

        @media (max-width: 520px) {
            .page-banner-title {
                font-size: 1.5rem;
            }

            .banner-stats {
                flex-direction: column;
                gap: var(--space-md);
            }

            .article-card {
                padding: var(--space-md);
            }

            .article-card-title {
                font-size: 1.05rem;
            }

            .filter-label {
                width: 100%;
                margin-bottom: 4px;
            }

            .cta-inner h2 {
                font-size: 1.3rem;
            }

            .btn {
                width: 100%;
                text-align: center;
            }
        }