*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        :root {
            --primary: #1a3a5c;
            --primary-light: #2a5a8c;
            --accent: #f5a623;
            --accent-hover: #e0941a;
            --bg-light: #f8f9fa;
            --bg-card: #ffffff;
            --text-dark: #1a1a2e;
            --text-muted: #5a6a7a;
            --border-light: #e2e8f0;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.08);
            --radius: 12px;
            --radius-sm: 8px;
            --transition: 0.25s ease;
            --font-base: 'Segoe UI', system-ui, -apple-system, sans-serif;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: var(--font-base);
            background: var(--bg-light);
            color: var(--text-dark);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent);
            text-decoration: underline;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: var(--primary);
            color: #fff;
            padding: 16px 0;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
        }
        .my-logo {
            font-size: 1.75rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: #fff;
            background: linear-gradient(135deg, #f5a623, #f7c948);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-shadow: 0 2px 8px rgba(245, 166, 35, 0.2);
            transition: opacity var(--transition);
        }
        .my-logo:hover {
            opacity: 0.85;
            text-decoration: none;
        }
        .my-logo i {
            -webkit-text-fill-color: initial;
            color: #f5a623;
            margin-right: 6px;
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }
        .nav-list {
            display: flex;
            list-style: none;
            gap: 4px;
            flex-wrap: wrap;
        }
        .nav-list li a {
            color: rgba(255, 255, 255, 0.88);
            padding: 8px 16px;
            border-radius: 40px;
            font-size: 0.9rem;
            font-weight: 500;
            transition: background var(--transition), color var(--transition);
            white-space: nowrap;
        }
        .nav-list li a:hover {
            background: rgba(255, 255, 255, 0.12);
            color: #f5a623;
            text-decoration: none;
        }
        .nav-list li a.active {
            background: rgba(245, 166, 35, 0.2);
            color: #f5a623;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.5rem;
            cursor: pointer;
            padding: 4px 10px;
            border-radius: 6px;
            transition: background var(--transition);
        }
        .hamburger:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .breadcrumb {
            background: var(--bg-card);
            padding: 12px 0;
            border-bottom: 1px solid var(--border-light);
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 6px 10px;
            align-items: center;
        }
        .breadcrumb ol li+li::before {
            content: "›";
            margin-right: 10px;
            color: #ccc;
            font-weight: 600;
        }
        .breadcrumb a {
            color: var(--primary-light);
        }
        .breadcrumb .current {
            color: var(--text-muted);
            font-weight: 500;
        }
        .hero {
            background: linear-gradient(135deg, #1a3a5c 0%, #2a5a8c 100%);
            color: #fff;
            padding: 60px 0 50px;
            text-align: center;
            border-radius: 0 0 var(--radius) var(--radius);
            margin-bottom: 40px;
        }
        .hero h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .hero h1 i {
            color: #f5a623;
            margin-right: 10px;
        }
        .hero p {
            font-size: 1.15rem;
            max-width: 720px;
            margin: 0 auto 20px;
            opacity: 0.9;
        }
        .hero .badge {
            display: inline-block;
            background: rgba(245, 166, 35, 0.2);
            border: 1px solid rgba(245, 166, 35, 0.4);
            padding: 6px 20px;
            border-radius: 40px;
            font-size: 0.85rem;
            color: #f5a623;
            font-weight: 600;
        }
        .hero .badge i {
            margin-right: 6px;
        }
        section {
            margin-bottom: 48px;
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 36px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
        }
        h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 3px solid var(--accent);
            display: inline-block;
        }
        h3 {
            font-size: 1.35rem;
            font-weight: 600;
            color: var(--primary-light);
            margin: 28px 0 12px;
        }
        h4 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-dark);
            margin: 20px 0 8px;
        }
        p {
            margin-bottom: 16px;
            color: #3a4a5a;
        }
        .highlight {
            background: #fff7e6;
            padding: 2px 8px;
            border-radius: 4px;
            font-weight: 600;
        }
        .emoji-big {
            font-size: 1.8rem;
            line-height: 1;
        }
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 24px;
            margin: 24px 0;
        }
        .card {
            background: var(--bg-light);
            border-radius: var(--radius-sm);
            padding: 24px 20px;
            border: 1px solid var(--border-light);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .card i {
            font-size: 2rem;
            color: var(--accent);
            margin-bottom: 12px;
        }
        .card h4 {
            margin-top: 0;
        }
        .feature-image {
            margin: 28px 0;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }
        .feature-image img {
            width: 100%;
            height: auto;
            max-height: 500px;
            object-fit: cover;
        }
        .feature-image figcaption {
            background: var(--bg-light);
            padding: 10px 18px;
            font-size: 0.85rem;
            color: var(--text-muted);
            border-top: 1px solid var(--border-light);
        }
        .search-box {
            display: flex;
            max-width: 520px;
            margin: 16px 0;
            border-radius: 60px;
            overflow: hidden;
            border: 2px solid var(--border-light);
            transition: border-color var(--transition);
            background: #fff;
        }
        .search-box:focus-within {
            border-color: var(--accent);
        }
        .search-box input {
            flex: 1;
            padding: 14px 20px;
            border: none;
            outline: none;
            font-size: 1rem;
            background: transparent;
            color: var(--text-dark);
        }
        .search-box button {
            background: var(--primary);
            color: #fff;
            border: none;
            padding: 0 24px;
            font-size: 1.1rem;
            cursor: pointer;
            transition: background var(--transition);
        }
        .search-box button:hover {
            background: var(--primary-light);
        }
        .form-group {
            margin-bottom: 18px;
        }
        .form-group label {
            display: block;
            font-weight: 600;
            margin-bottom: 4px;
            color: var(--text-dark);
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 12px 16px;
            border: 2px solid var(--border-light);
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-family: inherit;
            transition: border-color var(--transition);
            background: #fff;
            color: var(--text-dark);
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            border-color: var(--accent);
            outline: none;
        }
        .form-group textarea {
            min-height: 100px;
            resize: vertical;
        }
        .btn {
            background: var(--primary);
            color: #fff;
            border: none;
            padding: 12px 32px;
            border-radius: 40px;
            font-size: 0.95rem;
            font-weight: 600;
            cursor: pointer;
            transition: background var(--transition), transform var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn:hover {
            background: var(--primary-light);
            transform: scale(1.02);
        }
        .btn-accent {
            background: var(--accent);
            color: #1a1a2e;
        }
        .btn-accent:hover {
            background: var(--accent-hover);
        }
        .star-rating {
            display: flex;
            gap: 6px;
            font-size: 1.6rem;
            cursor: pointer;
            color: #d1d5db;
            transition: color var(--transition);
        }
        .star-rating i {
            transition: color var(--transition);
        }
        .star-rating i:hover,
        .star-rating i.active {
            color: #f5a623;
        }
        .site-footer {
            background: var(--primary);
            color: rgba(255, 255, 255, 0.85);
            padding: 40px 0 24px;
            margin-top: 48px;
            border-radius: var(--radius) var(--radius) 0 0;
        }
        .footer-inner {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 32px;
            margin-bottom: 32px;
        }
        .site-footer h4 {
            color: #f5a623;
            margin-bottom: 12px;
            font-size: 1.1rem;
        }
        .site-footer a {
            color: rgba(255, 255, 255, 0.75);
        }
        .site-footer a:hover {
            color: #f5a623;
        }
        friend-link {
            display: block;
            background: rgba(255, 255, 255, 0.06);
            padding: 16px 20px;
            border-radius: var(--radius-sm);
            margin-top: 12px;
            font-size: 0.9rem;
        }
        friend-link a {
            display: inline-block;
            margin-right: 16px;
            margin-bottom: 6px;
        }
        .copyright {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 20px;
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.6);
        }
        .last-update {
            display: inline-block;
            background: rgba(245, 166, 35, 0.15);
            padding: 4px 14px;
            border-radius: 40px;
            font-size: 0.8rem;
            color: #f5a623;
            font-weight: 500;
        }
        @media (max-width: 768px) {
            .header-inner {
                flex-wrap: wrap;
            }
            .nav-wrapper .nav-list {
                display: none;
                flex-direction: column;
                width: 100%;
                background: rgba(0, 0, 0, 0.2);
                border-radius: var(--radius-sm);
                padding: 8px 0;
                margin-top: 8px;
            }
            .nav-wrapper .nav-list.open {
                display: flex;
            }
            .nav-list li a {
                padding: 10px 20px;
                white-space: normal;
            }
            .hamburger {
                display: block;
            }
            .hero h1 {
                font-size: 1.8rem;
            }
            .hero p {
                font-size: 1rem;
            }
            section {
                padding: 20px 16px;
            }
            h2 {
                font-size: 1.4rem;
            }
            .card-grid {
                grid-template-columns: 1fr;
            }
            .footer-inner {
                grid-template-columns: 1fr;
            }
            .breadcrumb ol {
                font-size: 0.75rem;
                gap: 4px 6px;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 12px;
            }
            .hero {
                padding: 36px 0 30px;
            }
            .hero h1 {
                font-size: 1.5rem;
            }
            .search-box {
                flex-direction: column;
                border-radius: var(--radius-sm);
            }
            .search-box button {
                padding: 12px;
                width: 100%;
            }
            .star-rating {
                font-size: 1.3rem;
            }
        }
        .toc {
            background: var(--bg-light);
            border-left: 4px solid var(--accent);
            padding: 20px 24px;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin-bottom: 28px;
        }
        .toc ol {
            margin-left: 20px;
            color: var(--text-muted);
        }
        .toc ol li {
            margin-bottom: 4px;
        }
        .toc ol li a {
            font-weight: 500;
        }
        .flex-between {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
        }
        .gap-8 {
            gap: 8px;
        }
        .mt-12 {
            margin-top: 12px;
        }
        .mb-12 {
            margin-bottom: 12px;
        }
        .text-center {
            text-align: center;
        }
        .tag {
            display: inline-block;
            background: #eef2f7;
            padding: 2px 12px;
            border-radius: 40px;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--text-muted);
        }
        blockquote {
            background: #f0f4fa;
            padding: 20px 24px;
            border-radius: var(--radius-sm);
            border-left: 4px solid var(--primary);
            margin: 20px 0;
            font-style: italic;
            color: #2a3a4a;
        }
        blockquote cite {
            display: block;
            margin-top: 8px;
            font-size: 0.85rem;
            font-style: normal;
            color: var(--text-muted);
        }
        .data-table {
            width: 100%;
            border-collapse: collapse;
            margin: 20px 0;
            font-size: 0.9rem;
        }
        .data-table th,
        .data-table td {
            padding: 12px 16px;
            border-bottom: 1px solid var(--border-light);
            text-align: left;
        }
        .data-table th {
            background: var(--primary);
            color: #fff;
            font-weight: 600;
        }
        .data-table tr:nth-child(even) {
            background: #f8fafc;
        }
        .data-table tr:hover {
            background: #eef2f7;
        }
        @media (max-width: 600px) {
            .data-table {
                font-size: 0.75rem;
            }
            .data-table th,
            .data-table td {
                padding: 8px 8px;
            }
        }