/* roulang page: index */
:root {
            --color-primary: #1a1a2e;
            --color-primary-light: #252547;
            --color-accent: #e2a03f;
            --color-accent-light: #f0c267;
            --color-accent-dark: #c48a2c;
            --color-highlight: #c0392b;
            --color-highlight-light: #e74c3c;
            --color-success: #2d8f4e;
            --color-bg: #f8f6f0;
            --color-bg-alt: #f0ede4;
            --color-bg-dark: #1a1a2e;
            --color-surface: #ffffff;
            --color-text: #2c2c2c;
            --color-text-light: #6b6b6b;
            --color-text-muted: #9a9a9a;
            --color-text-on-dark: #f0ede4;
            --color-border: #e0dcd0;
            --color-border-light: #ebe7dd;
            --color-border-accent: #d4c9a8;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --shadow-xs: 0 1px 3px rgba(26, 26, 46, 0.06);
            --shadow-sm: 0 2px 8px rgba(26, 26, 46, 0.08);
            --shadow-md: 0 4px 16px rgba(26, 26, 46, 0.12);
            --shadow-lg: 0 8px 32px rgba(26, 26, 46, 0.16);
            --shadow-xl: 0 16px 48px rgba(26, 26, 46, 0.2);
            --shadow-glow: 0 0 24px rgba(226, 160, 63, 0.25);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', system-ui, -apple-system, sans-serif;
            --font-heading: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', 'Segoe UI', system-ui, sans-serif;
            --spacing-xs: 0.5rem;
            --spacing-sm: 0.75rem;
            --spacing-md: 1rem;
            --spacing-lg: 1.5rem;
            --spacing-xl: 2rem;
            --spacing-2xl: 3rem;
            --spacing-3xl: 4rem;
            --spacing-4xl: 6rem;
            --nav-height: 64px;
            --max-width: 1200px;
            --transition-fast: 0.18s ease;
            --transition-base: 0.28s ease;
            --transition-slow: 0.4s ease;
        }

        *,
        *::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: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            overflow-x: hidden;
        }

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

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

        a:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 3px;
            border-radius: 3px;
        }

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            background: none;
            transition: all var(--transition-base);
        }

        button:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 3px;
            border-radius: 3px;
        }

        input {
            font-family: inherit;
            border: none;
            outline: none;
            transition: all var(--transition-fast);
        }

        input:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
            border-radius: 4px;
        }

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

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

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

        @media (max-width: 520px) {
            .container {
                padding-left: var(--spacing-md);
                padding-right: var(--spacing-md);
            }
        }

        /* ===== HEADER & NAV ===== */
        .site-header {
            position: sticky;
            top: 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(--color-border-light);
            box-shadow: var(--shadow-xs);
            transition: box-shadow var(--transition-base);
        }

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

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

        .header-logo {
            display: flex;
            align-items: center;
            gap: var(--spacing-xs);
            font-family: var(--font-heading);
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--color-primary);
            letter-spacing: 0.02em;
            white-space: nowrap;
            flex-shrink: 0;
            transition: color var(--transition-fast);
        }

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

        .header-logo .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.1rem;
            font-weight: 900;
            flex-shrink: 0;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            list-style: none;
            flex-wrap: nowrap;
        }

        .nav-links li {
            position: relative;
        }

        .nav-links a {
            display: inline-block;
            padding: 0.45rem 0.9rem;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--color-text);
            border-radius: var(--radius-sm);
            white-space: nowrap;
            transition: all var(--transition-fast);
            position: relative;
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%) scaleX(0);
            width: 60%;
            height: 2px;
            background: var(--color-accent);
            border-radius: 1px;
            transition: transform var(--transition-base);
        }

        .nav-links a:hover {
            color: var(--color-accent-dark);
            background: rgba(226, 160, 63, 0.06);
        }

        .nav-links a:hover::after {
            transform: translateX(-50%) scaleX(1);
        }

        .nav-links a.nav-active {
            color: var(--color-accent-dark);
            font-weight: 600;
            background: rgba(226, 160, 63, 0.08);
        }

        .nav-links a.nav-active::after {
            transform: translateX(-50%) scaleX(1);
            background: var(--color-accent-dark);
            width: 70%;
        }

        .header-search {
            display: flex;
            align-items: center;
            gap: var(--spacing-xs);
            background: var(--color-bg-alt);
            border-radius: 24px;
            padding: 0.4rem 0.9rem;
            border: 1px solid transparent;
            transition: all var(--transition-fast);
            flex-shrink: 0;
            max-width: 190px;
        }

        .header-search:focus-within {
            border-color: var(--color-accent);
            background: var(--color-surface);
            box-shadow: var(--shadow-glow);
        }

        .header-search input {
            background: transparent;
            font-size: 0.88rem;
            width: 100%;
            min-width: 80px;
            color: var(--color-text);
        }

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

        .header-search .search-icon {
            color: var(--color-text-light);
            font-size: 1rem;
            flex-shrink: 0;
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast);
        }

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

        .hamburger span {
            display: block;
            width: 24px;
            height: 2.5px;
            background: var(--color-primary);
            border-radius: 2px;
            transition: all var(--transition-base);
        }

        .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);
        }

        @media (max-width: 768px) {
            .hamburger {
                display: flex;
            }

            .nav-links {
                display: none;
                position: absolute;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.99);
                backdrop-filter: blur(12px);
                flex-direction: column;
                padding: var(--spacing-lg);
                gap: var(--spacing-xs);
                border-bottom: 1px solid var(--color-border);
                box-shadow: var(--shadow-lg);
                z-index: 999;
            }

            .nav-links.open {
                display: flex;
            }

            .nav-links a {
                width: 100%;
                padding: 0.7rem 1rem;
                font-size: 1rem;
                border-radius: var(--radius-md);
            }

            .header-search {
                max-width: 140px;
            }
        }

        @media (max-width: 520px) {
            .header-search {
                display: none;
            }

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

            .header-logo .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 0.9rem;
            }
        }

        /* ===== HERO ===== */
        .hero {
            position: relative;
            min-height: 580px;
            display: flex;
            align-items: center;
            background: linear-gradient(160deg, #1a1a2e 0%, #252547 35%, #1e2040 70%, #1a1a2e 100%);
            overflow: hidden;
        }

        .hero-bg-img {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.3;
            mix-blend-mode: overlay;
        }

        .hero-pattern {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(226, 160, 63, 0.12) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 40%, rgba(240, 194, 103, 0.08) 0%, transparent 55%),
                radial-gradient(ellipse at 50% 80%, rgba(192, 57, 43, 0.06) 0%, transparent 50%);
            pointer-events: none;
        }

        .hero-dots {
            position: absolute;
            inset: 0;
            background-image: radial-gradient(rgba(255, 255, 255, 0.06) 1px, transparent 1px);
            background-size: 28px 28px;
            pointer-events: none;
            opacity: 0.5;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            padding: var(--spacing-4xl) 0;
            text-align: center;
            max-width: 750px;
            margin: 0 auto;
        }

        .hero-badge {
            display: inline-block;
            padding: 0.4rem 1.2rem;
            background: rgba(226, 160, 63, 0.18);
            border: 1px solid rgba(226, 160, 63, 0.4);
            border-radius: 24px;
            color: var(--color-accent-light);
            font-size: 0.9rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            margin-bottom: var(--spacing-xl);
            backdrop-filter: blur(6px);
        }

        .hero h1 {
            font-size: 3rem;
            font-weight: 800;
            color: #ffffff;
            margin-bottom: var(--spacing-lg);
            letter-spacing: 0.03em;
            text-shadow: 0 2px 12px rgba(0, 0, 0, 0.4);
            line-height: 1.25;
        }

        .hero h1 .highlight {
            color: var(--color-accent-light);
            position: relative;
        }

        .hero p {
            font-size: 1.2rem;
            color: rgba(240, 237, 228, 0.85);
            margin-bottom: var(--spacing-2xl);
            line-height: 1.7;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        .hero-buttons {
            display: flex;
            gap: var(--spacing-md);
            flex-wrap: wrap;
            justify-content: center;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 1.8rem;
            font-size: 1rem;
            font-weight: 600;
            border-radius: 28px;
            letter-spacing: 0.02em;
            cursor: pointer;
            transition: all var(--transition-base);
            white-space: nowrap;
            text-align: center;
            font-family: var(--font-sans);
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
            color: #1a1a2e;
            box-shadow: var(--shadow-glow);
            border: none;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(226, 160, 63, 0.4);
            background: linear-gradient(135deg, var(--color-accent-light), var(--color-accent));
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: var(--shadow-md);
        }

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

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

        .btn-outline:active {
            transform: translateY(0);
        }

        .btn-sm {
            padding: 0.5rem 1.2rem;
            font-size: 0.9rem;
            border-radius: 22px;
        }

        .btn-lg {
            padding: 0.9rem 2.2rem;
            font-size: 1.1rem;
            border-radius: 32px;
        }

        @media (max-width: 768px) {
            .hero {
                min-height: 440px;
            }

            .hero h1 {
                font-size: 2.1rem;
            }

            .hero p {
                font-size: 1rem;
            }

            .hero-content {
                padding: var(--spacing-2xl) 0;
            }
        }

        @media (max-width: 520px) {
            .hero {
                min-height: 380px;
            }

            .hero h1 {
                font-size: 1.6rem;
            }

            .hero p {
                font-size: 0.9rem;
            }

            .btn {
                padding: 0.6rem 1.3rem;
                font-size: 0.9rem;
            }
        }

        /* ===== SECTIONS ===== */
        .section {
            padding: var(--spacing-4xl) 0;
        }

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

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

        .section-header {
            text-align: center;
            margin-bottom: var(--spacing-3xl);
        }

        .section-header h2 {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: var(--spacing-sm);
            letter-spacing: 0.02em;
        }

        .section-header .section-subtitle {
            font-size: 1.05rem;
            color: var(--color-text-light);
            max-width: 550px;
            margin: 0 auto;
        }

        .section-dark .section-header h2 {
            color: #ffffff;
        }
        .section-dark .section-header .section-subtitle {
            color: rgba(240, 237, 228, 0.7);
        }

        @media (max-width: 768px) {
            .section {
                padding: var(--spacing-3xl) 0;
            }
            .section-header h2 {
                font-size: 1.7rem;
            }
        }

        @media (max-width: 520px) {
            .section-header h2 {
                font-size: 1.4rem;
            }
            .section {
                padding: var(--spacing-2xl) 0;
            }
        }

        /* ===== FEATURES GRID ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-xl);
        }

        .feature-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            padding: var(--spacing-2xl) var(--spacing-xl);
            text-align: center;
            border: 1px solid var(--color-border-light);
            box-shadow: var(--shadow-xs);
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 4px;
            background: var(--color-accent);
            border-radius: 0 0 4px 4px;
            opacity: 0;
            transition: all var(--transition-base);
        }

        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: var(--color-border-accent);
        }

        .feature-card:hover::before {
            opacity: 1;
            width: 80px;
        }

        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            background: linear-gradient(135deg, rgba(226, 160, 63, 0.15), rgba(240, 194, 103, 0.08));
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto var(--spacing-lg);
            font-size: 1.5rem;
            color: var(--color-accent-dark);
            transition: all var(--transition-base);
        }

        .feature-card:hover .feature-icon {
            transform: scale(1.1);
            background: linear-gradient(135deg, var(--color-accent), var(--color-accent-light));
            color: #1a1a2e;
        }

        .feature-card h3 {
            font-size: 1.15rem;
            margin-bottom: var(--spacing-sm);
            font-weight: 700;
        }

        .feature-card p {
            font-size: 0.92rem;
            color: var(--color-text-light);
            line-height: 1.6;
        }

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

        @media (max-width: 520px) {
            .features-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-lg);
            }
        }

        /* ===== CATEGORY ENTRY ===== */
        .category-entry-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-3xl);
            align-items: center;
        }

        .category-entry-visual {
            position: relative;
            border-radius: var(--radius-xl);
            overflow: hidden;
            aspect-ratio: 4 / 3;
            box-shadow: var(--shadow-lg);
        }

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

        .category-entry-visual:hover img {
            transform: scale(1.04);
        }

        .category-entry-visual .overlay-tag {
            position: absolute;
            top: var(--spacing-lg);
            left: var(--spacing-lg);
            background: rgba(26, 26, 46, 0.85);
            color: var(--color-accent-light);
            padding: 0.4rem 1rem;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.03em;
            backdrop-filter: blur(4px);
        }

        .category-entry-info h2 {
            font-size: 2rem;
            margin-bottom: var(--spacing-md);
        }

        .category-entry-info p {
            color: var(--color-text-light);
            margin-bottom: var(--spacing-xl);
            line-height: 1.7;
        }

        .tag-row {
            display: flex;
            flex-wrap: wrap;
            gap: var(--spacing-xs);
            margin-bottom: var(--spacing-xl);
        }

        .tag {
            display: inline-block;
            padding: 0.35rem 0.85rem;
            background: var(--color-bg-alt);
            border-radius: 20px;
            font-size: 0.85rem;
            color: var(--color-text-light);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-fast);
        }

        .tag:hover {
            background: rgba(226, 160, 63, 0.1);
            border-color: var(--color-accent);
            color: var(--color-accent-dark);
        }

        @media (max-width: 768px) {
            .category-entry-block {
                grid-template-columns: 1fr;
                gap: var(--spacing-xl);
            }
            .category-entry-info h2 {
                font-size: 1.5rem;
            }
        }

        /* ===== POST LIST ===== */
        .post-list {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-xl);
        }

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

        .post-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: var(--color-border-accent);
        }

        .post-card-image {
            aspect-ratio: 16 / 10;
            overflow: hidden;
            position: relative;
        }

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

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

        .post-card-image .post-category-tag {
            position: absolute;
            top: var(--spacing-sm);
            left: var(--spacing-sm);
            background: rgba(26, 26, 46, 0.8);
            color: var(--color-accent-light);
            padding: 0.25rem 0.7rem;
            border-radius: 14px;
            font-size: 0.78rem;
            font-weight: 600;
            backdrop-filter: blur(4px);
        }

        .post-card-body {
            padding: var(--spacing-lg);
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .post-card-body h3 {
            font-size: 1.1rem;
            margin-bottom: var(--spacing-sm);
            line-height: 1.4;
        }

        .post-card-body h3 a:hover {
            color: var(--color-accent-dark);
        }

        .post-card-body p {
            font-size: 0.9rem;
            color: var(--color-text-light);
            flex: 1;
            margin-bottom: var(--spacing-md);
            line-height: 1.6;
        }

        .post-card-meta {
            font-size: 0.8rem;
            color: var(--color-text-muted);
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-top: 1px solid var(--color-border-light);
            padding-top: var(--spacing-sm);
        }

        .post-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: var(--spacing-3xl);
            color: var(--color-text-muted);
            font-size: 1rem;
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            border: 2px dashed var(--color-border);
        }

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

        @media (max-width: 520px) {
            .post-list {
                grid-template-columns: 1fr;
            }
        }

        /* ===== STATS ===== */
        .stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-xl);
            text-align: center;
        }

        .stat-item {
            padding: var(--spacing-xl);
        }

        .stat-number {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--color-accent);
            letter-spacing: 0.02em;
            display: block;
            margin-bottom: var(--spacing-xs);
        }

        .stat-label {
            font-size: 0.95rem;
            color: var(--color-text-light);
            font-weight: 500;
        }

        @media (max-width: 768px) {
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
            }
            .stat-number {
                font-size: 2.2rem;
            }
        }

        @media (max-width: 520px) {
            .stat-number {
                font-size: 1.8rem;
            }
        }

        /* ===== PROCESS / PATH ===== */
        .process-path {
            display: flex;
            align-items: stretch;
            gap: 0;
            position: relative;
            flex-wrap: nowrap;
            overflow-x: auto;
            padding: var(--spacing-md) 0;
        }

        .process-step {
            flex: 1;
            min-width: 200px;
            text-align: center;
            padding: var(--spacing-xl) var(--spacing-lg);
            position: relative;
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border-light);
            box-shadow: var(--shadow-xs);
            transition: all var(--transition-base);
            margin-right: var(--spacing-lg);
        }

        .process-step:last-child {
            margin-right: 0;
        }

        .process-step:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--color-border-accent);
            transform: translateY(-3px);
        }

        .process-step-num {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
            color: #1a1a2e;
            font-weight: 800;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto var(--spacing-md);
            box-shadow: var(--shadow-glow);
        }

        .process-step h4 {
            font-size: 1rem;
            margin-bottom: var(--spacing-xs);
        }

        .process-step p {
            font-size: 0.85rem;
            color: var(--color-text-light);
        }

        .process-connector {
            display: none;
        }

        @media (max-width: 768px) {
            .process-path {
                flex-wrap: wrap;
                gap: var(--spacing-lg);
            }
            .process-step {
                flex: 1 1 calc(50% - var(--spacing-lg));
                min-width: 140px;
                margin-right: 0;
            }
        }

        @media (max-width: 520px) {
            .process-step {
                flex: 1 1 100%;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 750px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: var(--spacing-md);
        }

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

        .faq-item:hover {
            border-color: var(--color-border-accent);
            box-shadow: var(--shadow-sm);
        }

        .faq-question {
            width: 100%;
            text-align: left;
            padding: var(--spacing-lg) var(--spacing-xl);
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-primary);
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: var(--spacing-md);
            cursor: pointer;
            transition: all var(--transition-fast);
        }

        .faq-question:hover {
            color: var(--color-accent-dark);
            background: rgba(226, 160, 63, 0.03);
        }

        .faq-question .faq-arrow {
            flex-shrink: 0;
            transition: transform var(--transition-base);
            font-size: 0.8rem;
            color: var(--color-text-light);
        }

        .faq-item.open .faq-question .faq-arrow {
            transform: rotate(180deg);
            color: var(--color-accent);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-slow);
            padding: 0 var(--spacing-xl);
            font-size: 0.93rem;
            color: var(--color-text-light);
            line-height: 1.7;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 var(--spacing-xl) var(--spacing-lg);
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(160deg, #252547 0%, #1a1a2e 60%, #1e2040 100%);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 40% 30%, rgba(226, 160, 63, 0.15) 0%, transparent 55%);
            pointer-events: none;
        }

        .cta-inner {
            position: relative;
            z-index: 2;
            text-align: center;
            padding: var(--spacing-4xl) 0;
            max-width: 650px;
            margin: 0 auto;
        }

        .cta-inner h2 {
            color: #ffffff;
            font-size: 2rem;
            margin-bottom: var(--spacing-md);
        }

        .cta-inner p {
            color: rgba(240, 237, 228, 0.8);
            margin-bottom: var(--spacing-2xl);
            font-size: 1.05rem;
        }

        @media (max-width: 520px) {
            .cta-inner h2 {
                font-size: 1.5rem;
            }
        }

        /* ===== FOOTER ===== */
        .site-footer {
            background: var(--color-primary);
            color: var(--color-text-on-dark);
            padding: var(--spacing-3xl) 0 var(--spacing-xl);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: var(--spacing-2xl);
            margin-bottom: var(--spacing-3xl);
        }

        .footer-brand .footer-logo {
            font-family: var(--font-heading);
            font-size: 1.3rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: var(--spacing-sm);
            display: block;
        }

        .footer-brand p {
            color: rgba(240, 237, 228, 0.6);
            font-size: 0.9rem;
            line-height: 1.6;
        }

        .footer-col h4 {
            color: var(--color-accent-light);
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: var(--spacing-md);
            letter-spacing: 0.03em;
        }

        .footer-col ul {
            list-style: none;
        }

        .footer-col ul li {
            margin-bottom: var(--spacing-xs);
        }

        .footer-col ul li a {
            color: rgba(240, 237, 228, 0.6);
            font-size: 0.9rem;
            transition: color var(--transition-fast);
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(240, 237, 228, 0.12);
            padding-top: var(--spacing-lg);
            text-align: center;
            font-size: 0.85rem;
            color: rgba(240, 237, 228, 0.4);
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-xl);
            }
        }

        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== UTILITY ===== */
        .text-center {
            text-align: center;
        }
        .mb-0 {
            margin-bottom: 0;
        }
        .mt-0 {
            margin-top: 0;
        }

        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: 0.01ms !important;
            }
        }

/* roulang page: category1 */
/* ==================== 设计变量 ==================== */
        :root {
            --color-primary: #1e3a5f;
            --color-primary-light: #2c5a8c;
            --color-primary-dark: #152a45;
            --color-accent: #e8a850;
            --color-accent-hover: #d4953a;
            --color-accent-light: #fdf0e0;
            --color-bg: #f8f7f4;
            --color-bg-alt: #f0efeb;
            --color-surface: #ffffff;
            --color-text: #2c2c2c;
            --color-text-strong: #1a1a1a;
            --color-text-weak: #6b7280;
            --color-text-muted: #9ca3af;
            --color-border: #e5e7eb;
            --color-border-light: #f0f0ed;
            --color-success: #10b981;
            --color-success-bg: #ecfdf5;
            --color-tag-bg: #eef2f7;
            --color-tag-text: #3b5998;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 12px rgba(0,0,0,0.06);
            --shadow-lg: 0 8px 24px rgba(0,0,0,0.08);
            --shadow-xl: 0 14px 36px rgba(0,0,0,0.10);
            --shadow-card-hover: 0 8px 30px rgba(0,0,0,0.12);
            --spacing-xs: 4px;
            --spacing-sm: 8px;
            --spacing-md: 16px;
            --spacing-lg: 24px;
            --spacing-xl: 32px;
            --spacing-2xl: 48px;
            --spacing-3xl: 64px;
            --spacing-4xl: 80px;
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --font-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;
            --nav-height: 68px;
            --nav-height-mobile: 56px;
        }

        /* ==================== 基础 Reset ==================== */
        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-height: 100vh;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--color-accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button, input, select, textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }
        button {
            cursor: pointer;
        }
        ul, ol {
            list-style: none;
        }
        h1, h2, h3, h4, h5, h6 {
            line-height: 1.3;
            color: var(--color-text-strong);
            font-weight: 700;
        }
        h1 { font-size: 2.4rem; }
        h2 { font-size: 1.8rem; }
        h3 { font-size: 1.3rem; }
        h4 { font-size: 1.1rem; }

        /* ==================== 容器 ==================== */
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-lg);
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 var(--spacing-md);
            }
        }

        /* ==================== Header / Nav ==================== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: var(--color-primary);
            box-shadow: 0 2px 12px rgba(0,0,0,0.15);
            height: var(--nav-height);
            display: flex;
            align-items: center;
            transition: box-shadow var(--transition-base);
        }
        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(0,0,0,0.22);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-lg);
            height: 100%;
        }
        .site-logo {
            font-size: 1.35rem;
            font-weight: 700;
            color: #ffffff;
            letter-spacing: 0.02em;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            transition: opacity var(--transition-fast);
        }
        .site-logo:hover {
            opacity: 0.9;
            color: #ffffff;
        }
        .site-logo .logo-icon {
            width: 34px;
            height: 34px;
            background: var(--color-accent);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: var(--color-primary-dark);
            font-weight: 800;
            flex-shrink: 0;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: var(--spacing-xs);
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-links li a {
            display: block;
            padding: 8px 16px;
            color: rgba(255,255,255,0.82);
            font-size: 0.95rem;
            font-weight: 500;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .nav-links li a:hover {
            color: #ffffff;
            background: rgba(255,255,255,0.10);
        }
        .nav-links li a.nav-active {
            color: #ffffff;
            background: rgba(255,255,255,0.15);
            font-weight: 600;
        }
        .nav-search-btn {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 14px;
            color: rgba(255,255,255,0.75);
            font-size: 0.9rem;
            border-radius: 20px;
            border: 1px solid rgba(255,255,255,0.2);
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
            margin-left: var(--spacing-sm);
        }
        .nav-search-btn:hover {
            border-color: rgba(255,255,255,0.45);
            color: #ffffff;
            background: rgba(255,255,255,0.06);
        }
        .nav-search-btn .search-icon {
            font-size: 0.95rem;
        }
        .mobile-menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 6px;
            z-index: 1001;
            background: none;
            border: none;
        }
        .mobile-menu-toggle span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: #ffffff;
            border-radius: 2px;
            transition: all var(--transition-base);
        }
        .mobile-menu-toggle.active span:nth-child(1) {
            transform: translateY(7.5px) rotate(45deg);
        }
        .mobile-menu-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .mobile-menu-toggle.active span:nth-child(3) {
            transform: translateY(-7.5px) rotate(-45deg);
        }

        /* ==================== 分类 Banner ==================== */
        .category-banner {
            position: relative;
            background: linear-gradient(160deg, var(--color-primary-dark) 0%, #1a3350 40%, #1e3a5f 100%);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            padding: var(--spacing-4xl) 0 var(--spacing-3xl);
            color: #ffffff;
            overflow: hidden;
        }
        .category-banner::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(180deg, rgba(21,42,69,0.55) 0%, rgba(21,42,69,0.78) 100%);
            z-index: 1;
        }
        .category-banner .container {
            position: relative;
            z-index: 2;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            font-size: 0.9rem;
            color: rgba(255,255,255,0.7);
            margin-bottom: var(--spacing-lg);
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: rgba(255,255,255,0.8);
            transition: color var(--transition-fast);
        }
        .breadcrumb a:hover {
            color: var(--color-accent);
        }
        .breadcrumb .separator {
            color: rgba(255,255,255,0.4);
            font-size: 0.8rem;
        }
        .breadcrumb .current {
            color: #ffffff;
            font-weight: 500;
        }
        .category-banner-content h1 {
            font-size: 2.6rem;
            color: #ffffff;
            margin-bottom: var(--spacing-md);
            font-weight: 800;
            letter-spacing: 0.01em;
        }
        .category-banner-content .category-desc {
            font-size: 1.1rem;
            color: rgba(255,255,255,0.82);
            max-width: 650px;
            line-height: 1.8;
        }
        .category-stats {
            display: flex;
            gap: var(--spacing-2xl);
            margin-top: var(--spacing-xl);
            flex-wrap: wrap;
        }
        .category-stat-item {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
        }
        .category-stat-item .stat-number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--color-accent);
            line-height: 1;
        }
        .category-stat-item .stat-label {
            font-size: 0.9rem;
            color: rgba(255,255,255,0.7);
        }

        /* ==================== 子分类标签栏 ==================== */
        .sub-tags-bar {
            background: var(--color-surface);
            border-bottom: 1px solid var(--color-border-light);
            padding: var(--spacing-md) 0;
            position: sticky;
            top: var(--nav-height);
            z-index: 999;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
        }
        .sub-tags-bar .container {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            flex-wrap: nowrap;
            min-width: max-content;
        }
        .sub-tags-bar::-webkit-scrollbar {
            height: 0;
        }
        .sub-tag-link {
            display: inline-block;
            padding: 7px 16px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--color-text-weak);
            background: var(--color-bg-alt);
            border-radius: 20px;
            white-space: nowrap;
            transition: all var(--transition-fast);
            cursor: pointer;
            border: 1px solid transparent;
        }
        .sub-tag-link:hover {
            color: var(--color-primary);
            background: #e8ecf2;
            border-color: #d0d7e2;
        }
        .sub-tag-link.active {
            color: #ffffff;
            background: var(--color-primary);
            border-color: var(--color-primary);
            font-weight: 600;
        }

        /* ==================== 主体布局 ==================== */
        .main-content {
            padding: var(--spacing-3xl) 0 var(--spacing-4xl);
        }
        .content-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: var(--spacing-2xl);
            align-items: start;
        }
        @media (max-width: 1024px) {
            .content-layout {
                grid-template-columns: 1fr;
            }
        }

        /* ==================== 文章卡片网格 ==================== */
        .articles-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--spacing-lg);
        }
        @media (max-width: 768px) {
            .articles-grid {
                grid-template-columns: 1fr;
            }
        }
        .article-card {
            background: var(--color-surface);
            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;
            height: 100%;
        }
        .article-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
            border-color: #d8dce3;
        }
        .article-card-image {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 10;
            background: var(--color-bg-alt);
        }
        .article-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .article-card:hover .article-card-image img {
            transform: scale(1.04);
        }
        .article-card-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            display: inline-block;
            padding: 4px 12px;
            font-size: 0.78rem;
            font-weight: 600;
            color: #ffffff;
            background: var(--color-accent);
            border-radius: 14px;
            z-index: 2;
            letter-spacing: 0.02em;
        }
        .article-card-body {
            padding: var(--spacing-lg);
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .article-card-body h3 {
            font-size: 1.1rem;
            margin-bottom: var(--spacing-sm);
            line-height: 1.45;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .article-card-body h3 a {
            color: var(--color-text-strong);
            transition: color var(--transition-fast);
        }
        .article-card-body h3 a:hover {
            color: var(--color-primary-light);
        }
        .article-card-body .article-excerpt {
            font-size: 0.9rem;
            color: var(--color-text-weak);
            line-height: 1.65;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
        }
        .article-card-meta {
            display: flex;
            align-items: center;
            gap: var(--spacing-md);
            margin-top: var(--spacing-md);
            padding-top: var(--spacing-sm);
            border-top: 1px solid var(--color-border-light);
            font-size: 0.82rem;
            color: var(--color-text-muted);
        }
        .article-card-meta .meta-views {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        /* ==================== 侧边栏 ==================== */
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-lg);
        }
        @media (max-width: 1024px) {
            .sidebar {
                display: grid;
                grid-template-columns: repeat(2, 1fr);
                gap: var(--spacing-md);
            }
        }
        @media (max-width: 520px) {
            .sidebar {
                grid-template-columns: 1fr;
            }
        }
        .sidebar-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            padding: var(--spacing-lg);
            border: 1px solid var(--color-border-light);
            box-shadow: var(--shadow-sm);
        }
        .sidebar-card h4 {
            font-size: 1rem;
            margin-bottom: var(--spacing-md);
            padding-bottom: var(--spacing-sm);
            border-bottom: 2px solid var(--color-accent);
            display: inline-block;
            color: var(--color-text-strong);
        }
        .sidebar-article-list li {
            padding: var(--spacing-sm) 0;
            border-bottom: 1px solid var(--color-border-light);
        }
        .sidebar-article-list li:last-child {
            border-bottom: none;
        }
        .sidebar-article-list li a {
            font-size: 0.9rem;
            color: var(--color-text);
            line-height: 1.5;
            display: block;
            transition: color var(--transition-fast);
        }
        .sidebar-article-list li a:hover {
            color: var(--color-primary-light);
        }
        .sidebar-article-list li .side-meta {
            font-size: 0.78rem;
            color: var(--color-text-muted);
            margin-top: 2px;
        }
        .sidebar-tags {
            display: flex;
            flex-wrap: wrap;
            gap: var(--spacing-xs);
        }
        .sidebar-tag {
            display: inline-block;
            padding: 5px 12px;
            font-size: 0.8rem;
            background: var(--color-bg-alt);
            color: var(--color-text-weak);
            border-radius: 16px;
            transition: all var(--transition-fast);
            cursor: pointer;
            border: 1px solid transparent;
        }
        .sidebar-tag:hover {
            background: var(--color-accent-light);
            color: var(--color-accent);
            border-color: var(--color-accent);
        }

        /* ==================== 精选推荐区 ==================== */
        .section-featured {
            padding: var(--spacing-3xl) 0;
            background: var(--color-surface);
            border-top: 1px solid var(--color-border-light);
            border-bottom: 1px solid var(--color-border-light);
        }
        .section-title {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--color-text-strong);
            margin-bottom: var(--spacing-xl);
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
        }
        .section-title::before {
            content: '';
            width: 4px;
            height: 28px;
            background: var(--color-accent);
            border-radius: 2px;
            display: inline-block;
        }
        .featured-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-lg);
        }
        @media (max-width: 768px) {
            .featured-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .featured-grid {
                grid-template-columns: 1fr;
            }
        }
        .featured-card {
            background: var(--color-bg);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-base);
            height: 100%;
        }
        .featured-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
        }
        .featured-card-image {
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--color-bg-alt);
        }
        .featured-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .featured-card:hover .featured-card-image img {
            transform: scale(1.05);
        }
        .featured-card-body {
            padding: var(--spacing-md);
        }
        .featured-card-body h4 {
            font-size: 0.95rem;
            margin-bottom: var(--spacing-xs);
            line-height: 1.4;
        }
        .featured-card-body .featured-tag {
            font-size: 0.75rem;
            color: var(--color-accent);
            font-weight: 600;
        }

        /* ==================== 热门排行区 ==================== */
        .section-ranking {
            padding: var(--spacing-3xl) 0;
        }
        .ranking-list {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }
        .ranking-item {
            display: flex;
            align-items: center;
            gap: var(--spacing-md);
            background: var(--color-surface);
            padding: var(--spacing-md) var(--spacing-lg);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-fast);
            cursor: pointer;
        }
        .ranking-item:hover {
            box-shadow: var(--shadow-md);
            border-color: #d0d5dc;
        }
        .ranking-number {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--color-text-muted);
            min-width: 40px;
            text-align: center;
            flex-shrink: 0;
        }
        .ranking-item:nth-child(1) .ranking-number { color: #e8a850; }
        .ranking-item:nth-child(2) .ranking-number { color: #a0a8b4; }
        .ranking-item:nth-child(3) .ranking-number { color: #c4946a; }
        .ranking-info {
            flex: 1;
            min-width: 0;
        }
        .ranking-info h4 {
            font-size: 0.95rem;
            margin-bottom: 2px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .ranking-info .ranking-meta {
            font-size: 0.8rem;
            color: var(--color-text-muted);
        }
        .ranking-badge {
            font-size: 0.75rem;
            padding: 4px 10px;
            background: var(--color-success-bg);
            color: var(--color-success);
            border-radius: 12px;
            font-weight: 600;
            white-space: nowrap;
            flex-shrink: 0;
        }

        /* ==================== FAQ 区 ==================== */
        .section-faq {
            padding: var(--spacing-3xl) 0;
            background: var(--color-bg-alt);
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }
        .faq-item {
            background: var(--color-surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border-light);
            overflow: hidden;
            transition: all var(--transition-fast);
        }
        .faq-item:hover {
            border-color: #d0d5dc;
        }
        .faq-question {
            width: 100%;
            text-align: left;
            padding: var(--spacing-lg);
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-text-strong);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: var(--spacing-md);
            background: none;
            border: none;
            transition: background var(--transition-fast);
        }
        .faq-question:hover {
            background: var(--color-bg);
        }
        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--color-bg-alt);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            transition: all var(--transition-base);
            color: var(--color-text-weak);
        }
        .faq-item.open .faq-question .faq-icon {
            background: var(--color-accent);
            color: #ffffff;
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-base);
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
        }
        .faq-answer-inner {
            padding: 0 var(--spacing-lg) var(--spacing-lg);
            color: var(--color-text-weak);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        /* ==================== CTA 区 ==================== */
        .section-cta {
            padding: var(--spacing-4xl) 0;
            text-align: center;
            background: linear-gradient(160deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
            color: #ffffff;
        }
        .section-cta h2 {
            font-size: 2rem;
            color: #ffffff;
            margin-bottom: var(--spacing-md);
            font-weight: 800;
        }
        .section-cta p {
            font-size: 1.05rem;
            color: rgba(255,255,255,0.8);
            max-width: 550px;
            margin: 0 auto var(--spacing-xl);
            line-height: 1.7;
        }
        .btn-cta {
            display: inline-block;
            padding: 14px 36px;
            font-size: 1rem;
            font-weight: 700;
            color: var(--color-primary-dark);
            background: var(--color-accent);
            border-radius: 28px;
            transition: all var(--transition-base);
            cursor: pointer;
            letter-spacing: 0.02em;
        }
        .btn-cta:hover {
            background: var(--color-accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(232,168,80,0.35);
            color: var(--color-primary-dark);
        }

        /* ==================== Footer ==================== */
        .site-footer {
            background: var(--color-primary-dark);
            color: rgba(255,255,255,0.75);
            padding: var(--spacing-3xl) 0 var(--spacing-lg);
            font-size: 0.9rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: var(--spacing-2xl);
            padding-bottom: var(--spacing-xl);
            border-bottom: 1px solid rgba(255,255,255,0.12);
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }
        .footer-brand .footer-logo {
            font-size: 1.2rem;
            font-weight: 700;
            color: #ffffff;
            display: block;
            margin-bottom: var(--spacing-sm);
        }
        .footer-brand p {
            color: rgba(255,255,255,0.6);
            line-height: 1.6;
        }
        .footer-col h4 {
            color: #ffffff;
            font-size: 1rem;
            margin-bottom: var(--spacing-md);
            font-weight: 600;
        }
        .footer-col ul li {
            margin-bottom: var(--spacing-xs);
        }
        .footer-col ul li a {
            color: rgba(255,255,255,0.6);
            transition: color var(--transition-fast);
            font-size: 0.88rem;
        }
        .footer-col ul li a:hover {
            color: var(--color-accent);
        }
        .footer-bottom {
            text-align: center;
            padding-top: var(--spacing-lg);
            color: rgba(255,255,255,0.45);
            font-size: 0.82rem;
        }

        /* ==================== 响应式导航移动端 ==================== */
        @media (max-width: 768px) {
            .site-header {
                height: var(--nav-height-mobile);
            }
            .header-inner {
                padding: 0 var(--spacing-md);
            }
            .site-logo {
                font-size: 1.15rem;
            }
            .site-logo .logo-icon {
                width: 28px;
                height: 28px;
                font-size: 0.9rem;
            }
            .nav-search-btn {
                display: none;
            }
            .mobile-menu-toggle {
                display: flex;
            }
            .nav-links {
                position: fixed;
                top: var(--nav-height-mobile);
                left: 0;
                right: 0;
                bottom: 0;
                background: var(--color-primary);
                flex-direction: column;
                align-items: stretch;
                padding: var(--spacing-lg);
                gap: var(--spacing-xs);
                transform: translateX(100%);
                transition: transform var(--transition-base);
                z-index: 999;
                overflow-y: auto;
            }
            .nav-links.open {
                transform: translateX(0);
            }
            .nav-links li a {
                padding: 14px 16px;
                font-size: 1.05rem;
                border-radius: var(--radius-md);
            }
            .sub-tags-bar {
                top: var(--nav-height-mobile);
            }
            .category-banner {
                padding: var(--spacing-2xl) 0 var(--spacing-xl);
            }
            .category-banner-content h1 {
                font-size: 1.8rem;
            }
            .category-banner-content .category-desc {
                font-size: 0.95rem;
            }
            .category-stat-item .stat-number {
                font-size: 1.5rem;
            }
            h1 { font-size: 1.8rem; }
            h2 { font-size: 1.4rem; }
            .section-title {
                font-size: 1.3rem;
            }
        }
        @media (max-width: 520px) {
            .category-banner-content h1 {
                font-size: 1.5rem;
            }
            .category-stats {
                gap: var(--spacing-lg);
            }
            .articles-grid {
                grid-template-columns: 1fr;
            }
            .article-card-body h3 {
                font-size: 1rem;
            }
            .section-cta h2 {
                font-size: 1.4rem;
            }
            .btn-cta {
                padding: 12px 28px;
                font-size: 0.95rem;
            }
        }

        /* ==================== 工具类 ==================== */
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }

/* roulang page: article */
:root {
            --primary: #1e40af;
            --primary-light: #3b82f6;
            --primary-dark: #1e3a8a;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --accent-dark: #d97706;
            --bg: #f8fafc;
            --bg-white: #ffffff;
            --bg-dark: #0f172a;
            --bg-card: #ffffff;
            --text: #1e293b;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --text-light: #cbd5e1;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius-sm: 8px;
            --radius: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
            --shadow: 0 4px 16px rgba(0,0,0,0.08);
            --shadow-md: 0 8px 30px rgba(0,0,0,0.12);
            --shadow-lg: 0 16px 48px rgba(0,0,0,0.16);
            --shadow-glow: 0 0 40px rgba(59,130,246,0.15);
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
            --transition: 0.22s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-slow: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --max-content: 780px;
            --header-height: 68px;
            --progress-height: 3px;
        }

        *, *::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: 1.7;
            color: var(--text);
            background: var(--bg);
            min-height: 100vh;
            padding-top: var(--header-height);
            transition: background var(--transition);
        }

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

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition), opacity var(--transition);
        }

        a:hover {
            color: var(--primary-light);
            text-decoration: none;
        }

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

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

        ul, ol {
            list-style: none;
        }

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

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

        /* ========== Reading Progress Bar ========== */
        .reading-progress {
            position: fixed;
            top: var(--header-height);
            left: 0;
            width: 0%;
            height: var(--progress-height);
            background: linear-gradient(90deg, var(--primary-light), var(--accent));
            z-index: 999;
            transition: width 0.1s linear;
            border-radius: 0 2px 2px 0;
        }

        /* ========== Header / Nav ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255,255,255,0.95);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            height: var(--header-height);
            transition: all var(--transition);
        }

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

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

        .logo-wrap {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: #fff;
            font-weight: 700;
            box-shadow: 0 2px 8px rgba(30,64,175,0.3);
        }

        .logo-text {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--primary-dark);
            letter-spacing: -0.01em;
            white-space: nowrap;
        }

        .logo-text a {
            color: inherit;
            text-decoration: none;
        }

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

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
        }

        .nav-links a {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            border-radius: 20px;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-secondary);
            text-decoration: none;
            transition: all var(--transition);
            white-space: nowrap;
            position: relative;
        }

        .nav-links a:hover {
            color: var(--primary);
            background: rgba(30,64,175,0.05);
        }

        .nav-links a.nav-active {
            color: #fff;
            background: var(--primary);
            font-weight: 600;
            box-shadow: 0 2px 12px rgba(30,64,175,0.25);
        }

        .nav-links a.nav-active:hover {
            color: #fff;
            background: var(--primary-light);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .btn-search {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--border-light);
            color: var(--text-secondary);
            transition: all var(--transition);
            font-size: 1rem;
        }

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

        .mobile-menu-toggle {
            display: none;
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: var(--border-light);
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
            transition: all var(--transition);
        }

        .mobile-menu-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: all var(--transition);
        }

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

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

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

        .nav-overlay {
            display: none;
            position: fixed;
            inset: 0;
            top: var(--header-height);
            background: rgba(0,0,0,0.35);
            z-index: 998;
            opacity: 0;
            transition: opacity var(--transition);
        }

        .nav-overlay.active {
            display: block;
            opacity: 1;
        }

        /* ========== Article Banner ========== */
        .article-banner {
            position: relative;
            background: linear-gradient(135deg, var(--bg-dark) 0%, #1e3a5f 40%, #0f2b45 100%);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            padding: 60px 0 48px;
            color: #fff;
            overflow: hidden;
        }

        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 40% 60%, rgba(245,158,11,0.15) 0%, transparent 70%),
                        radial-gradient(ellipse at 70% 30%, rgba(59,130,246,0.12) 0%, transparent 60%);
            pointer-events: none;
        }

        .article-banner .container-narrow {
            position: relative;
            z-index: 2;
        }

        .article-meta-top {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 12px;
            margin-bottom: 20px;
            font-size: 0.88rem;
            color: rgba(255,255,255,0.8);
        }

        .article-category-tag {
            display: inline-flex;
            align-items: center;
            padding: 5px 14px;
            border-radius: 20px;
            background: rgba(255,255,255,0.15);
            backdrop-filter: blur(4px);
            font-size: 0.82rem;
            font-weight: 500;
            color: #fff;
            border: 1px solid rgba(255,255,255,0.2);
            text-decoration: none;
            transition: all var(--transition);
        }

        .article-category-tag:hover {
            background: rgba(255,255,255,0.25);
            color: #fff;
        }

        .article-meta-sep {
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background: rgba(255,255,255,0.5);
        }

        .article-banner h1 {
            font-size: 2.2rem;
            font-weight: 800;
            line-height: 1.35;
            letter-spacing: -0.02em;
            margin: 0 0 16px;
            color: #fff;
            text-shadow: 0 2px 12px rgba(0,0,0,0.3);
        }

        .article-banner .article-excerpt {
            font-size: 1.08rem;
            line-height: 1.65;
            color: rgba(255,255,255,0.85);
            max-width: 650px;
        }

        /* ========== Breadcrumb ========== */
        .breadcrumb-wrap {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border);
            padding: 12px 0;
        }

        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 6px;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        .breadcrumb a {
            color: var(--text-secondary);
            text-decoration: none;
            transition: color var(--transition);
        }

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

        .breadcrumb .sep {
            color: var(--text-muted);
            font-size: 0.7rem;
            margin: 0 2px;
        }

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

        /* ========== Article Content ========== */
        .article-main {
            padding: 48px 0 60px;
            background: var(--bg-white);
        }

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

        .article-content h2 {
            font-size: 1.55rem;
            font-weight: 700;
            margin: 36px 0 16px;
            color: var(--primary-dark);
            padding-bottom: 8px;
            border-bottom: 2px solid var(--border);
            letter-spacing: -0.01em;
        }

        .article-content h3 {
            font-size: 1.3rem;
            font-weight: 600;
            margin: 28px 0 12px;
            color: var(--text);
        }

        .article-content p {
            margin-bottom: 16px;
        }

        .article-content ul, .article-content ol {
            margin: 12px 0 20px 20px;
            list-style: disc;
        }

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

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

        .article-content img {
            border-radius: var(--radius);
            margin: 24px auto;
            box-shadow: var(--shadow);
        }

        .article-content blockquote {
            margin: 24px 0;
            padding: 18px 24px;
            background: linear-gradient(135deg, rgba(30,64,175,0.03), rgba(245,158,11,0.04));
            border-left: 4px solid var(--accent);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            font-style: italic;
            color: var(--text-secondary);
        }

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

        .article-content a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
            text-decoration-thickness: 1px;
            text-decoration-color: rgba(30,64,175,0.25);
            transition: all var(--transition);
        }

        .article-content a:hover {
            text-decoration-color: var(--primary);
            color: var(--primary-light);
        }

        .article-divider {
            border: none;
            border-top: 1px solid var(--border);
            margin: 40px 0;
        }

        .article-tags-row {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 32px;
        }

        .article-tag {
            display: inline-flex;
            padding: 6px 14px;
            border-radius: 20px;
            background: var(--border-light);
            font-size: 0.82rem;
            color: var(--text-secondary);
            transition: all var(--transition);
            text-decoration: none;
        }

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

        /* ========== Not Found ========== */
        .not-found-section {
            padding: 80px 0;
            text-align: center;
            background: var(--bg-white);
        }

        .not-found-icon {
            font-size: 4rem;
            margin-bottom: 20px;
            opacity: 0.6;
        }

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

        .not-found-section p {
            color: var(--text-secondary);
            margin-bottom: 28px;
            max-width: 480px;
            margin-left: auto;
            margin-right: auto;
        }

        .btn-back-home {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 25px;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
            text-decoration: none;
            transition: all var(--transition);
            box-shadow: 0 4px 16px rgba(30,64,175,0.25);
        }

        .btn-back-home:hover {
            background: var(--primary-light);
            color: #fff;
            box-shadow: 0 6px 24px rgba(30,64,175,0.35);
            transform: translateY(-1px);
        }

        /* ========== Related Articles ========== */
        .related-section {
            padding: 56px 0 60px;
            background: var(--bg);
        }

        .section-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 32px;
            flex-wrap: wrap;
            gap: 12px;
        }

        .section-title {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text);
            letter-spacing: -0.01em;
        }

        .section-title-accent {
            display: inline-block;
            width: 32px;
            height: 4px;
            border-radius: 2px;
            background: var(--accent);
            margin-right: 12px;
            vertical-align: middle;
            margin-top: -4px;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: 20px;
        }

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

        .related-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
            border-color: transparent;
        }

        .related-card-img {
            width: 100%;
            height: 170px;
            object-fit: cover;
            display: block;
        }

        .related-card-body {
            padding: 18px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .related-card-cat {
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--primary);
            text-transform: uppercase;
            letter-spacing: 0.04em;
        }

        .related-card-title {
            font-size: 1.02rem;
            font-weight: 600;
            line-height: 1.45;
            color: var(--text);
            transition: color var(--transition);
        }

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

        .related-card-meta {
            font-size: 0.82rem;
            color: var(--text-muted);
            margin-top: auto;
        }

        .related-card-link {
            text-decoration: none;
            color: inherit;
        }

        /* ========== CTA Section ========== */
        .cta-section {
            padding: 56px 0 60px;
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            color: #fff;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(245,158,11,0.18) 0%, transparent 60%),
                        radial-gradient(ellipse at 70% 30%, rgba(255,255,255,0.06) 0%, transparent 50%);
            pointer-events: none;
        }

        .cta-section .container-narrow {
            position: relative;
            z-index: 2;
        }

        .cta-section h2 {
            font-size: 1.7rem;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .cta-section p {
            font-size: 1.05rem;
            opacity: 0.9;
            margin-bottom: 28px;
            max-width: 520px;
            margin-left: auto;
            margin-right: auto;
        }

        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 25px;
            background: var(--accent);
            color: #1a1a1a;
            font-weight: 700;
            font-size: 1rem;
            text-decoration: none;
            transition: all var(--transition);
            box-shadow: 0 6px 24px rgba(245,158,11,0.35);
        }

        .btn-cta:hover {
            background: var(--accent-light);
            color: #1a1a1a;
            transform: translateY(-2px);
            box-shadow: 0 10px 32px rgba(245,158,11,0.45);
        }

        /* ========== Footer ========== */
        .site-footer {
            background: var(--bg-dark);
            color: var(--text-light);
            padding: 48px 0 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 36px;
        }

        .footer-logo {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            display: block;
            margin-bottom: 10px;
        }

        .footer-brand p {
            font-size: 0.88rem;
            line-height: 1.6;
            opacity: 0.75;
            max-width: 280px;
        }

        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }

        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-col a {
            font-size: 0.88rem;
            color: var(--text-light);
            text-decoration: none;
            transition: color var(--transition);
            opacity: 0.8;
        }

        .footer-col a:hover {
            color: var(--accent-light);
            opacity: 1;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 20px;
            text-align: center;
            font-size: 0.82rem;
            opacity: 0.6;
        }

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

            .article-banner h1 {
                font-size: 1.8rem;
            }

            .related-grid {
                grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 60px;
            }

            .mobile-menu-toggle {
                display: flex;
            }

            .nav-links {
                position: fixed;
                top: var(--header-height);
                right: -100%;
                width: 280px;
                height: calc(100vh - var(--header-height));
                background: #fff;
                flex-direction: column;
                padding: 24px 20px;
                gap: 4px;
                box-shadow: var(--shadow-lg);
                transition: right var(--transition-slow);
                z-index: 999;
                overflow-y: auto;
                border-left: 1px solid var(--border);
            }

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

            .nav-links a {
                width: 100%;
                padding: 12px 16px;
                border-radius: var(--radius-sm);
                font-size: 0.95rem;
            }

            .nav-overlay.active {
                display: block;
                opacity: 1;
            }

            .article-banner {
                padding: 40px 0 32px;
            }

            .article-banner h1 {
                font-size: 1.5rem;
            }

            .article-banner .article-excerpt {
                font-size: 0.95rem;
            }

            .article-content {
                font-size: 0.98rem;
            }

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

            .related-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .section-title {
                font-size: 1.25rem;
            }

            .cta-section h2 {
                font-size: 1.4rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .container-narrow {
                padding: 0 16px;
            }

            .header-inner {
                padding: 0 16px;
            }

            .logo-text {
                font-size: 1rem;
            }

            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 15px;
            }

            .article-banner h1 {
                font-size: 1.3rem;
            }

            .article-banner {
                padding: 28px 0 24px;
            }

            .article-meta-top {
                font-size: 0.78rem;
                gap: 8px;
            }

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

            .related-card-img {
                height: 140px;
            }

            .article-content {
                font-size: 0.94rem;
            }

            .article-content blockquote {
                padding: 14px 18px;
            }

            .breadcrumb {
                font-size: 0.78rem;
            }

            .btn-cta {
                padding: 12px 24px;
                font-size: 0.95rem;
            }

            .nav-links {
                width: 100%;
                right: -100%;
            }
        }