*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        :root {
            --primary: #1a2a6c;
            --secondary: #b21f1f;
            --accent: #fdbb2d;
            --bg: #f8f9fc;
            --card-bg: #ffffff;
            --text: #1e1e2a;
            --text-light: #555;
            --border: #e0e4ed;
            --shadow: 0 8px 28px rgba(0, 0, 0, 0.06);
            --radius: 16px;
            --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --max-width: 1200px;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color 0.25s;
        }
        a:hover {
            color: var(--secondary);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius);
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: var(--card-bg);
            box-shadow: 0 2px 16px rgba(0, 0, 0, 0.05);
            position: sticky;
            top: 0;
            z-index: 100;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 20px;
            max-width: var(--max-width);
            margin: 0 auto;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.5px;
        }
        .my-logo small {
            font-size: 0.7rem;
            font-weight: 400;
            -webkit-text-fill-color: var(--text-light);
            display: block;
            letter-spacing: 1px;
        }
        .my-logo a {
            background: none;
            -webkit-text-fill-color: transparent;
        }
        .my-logo a:hover {
            opacity: 0.85;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: var(--primary);
            cursor: pointer;
            padding: 4px 8px;
        }
        nav {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        nav a {
            padding: 8px 16px;
            border-radius: 40px;
            font-weight: 500;
            color: var(--text);
            transition: background 0.2s, color 0.2s;
            font-size: 0.92rem;
        }
        nav a:hover {
            background: var(--primary);
            color: #fff;
        }
        .nav-active {
            background: var(--primary);
            color: #fff !important;
        }
        .breadcrumb {
            padding: 12px 20px;
            font-size: 0.85rem;
            background: #f0f2f7;
            border-bottom: 1px solid var(--border);
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            max-width: var(--max-width);
            margin: 0 auto;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin: 0 8px;
            color: #999;
        }
        .breadcrumb a {
            color: var(--text-light);
        }
        .breadcrumb .current {
            color: var(--text);
            font-weight: 600;
        }
        main {
            padding: 32px 0 60px;
        }
        .main-grid {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 40px;
        }
        @media (max-width: 960px) {
            .main-grid {
                grid-template-columns: 1fr;
            }
        }
        .content-area {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 32px 28px;
            box-shadow: var(--shadow);
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }
        .sidebar-card {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 20px 18px;
            box-shadow: var(--shadow);
        }
        .sidebar-card h3 {
            font-size: 1.1rem;
            margin-bottom: 12px;
            border-left: 4px solid var(--accent);
            padding-left: 12px;
        }
        h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 16px;
            color: var(--primary);
        }
        h2 {
            font-size: 1.9rem;
            font-weight: 700;
            margin: 40px 0 16px;
            color: var(--primary);
            border-bottom: 3px solid var(--accent);
            padding-bottom: 6px;
        }
        h3 {
            font-size: 1.4rem;
            font-weight: 600;
            margin: 28px 0 12px;
            color: var(--secondary);
        }
        h4 {
            font-size: 1.12rem;
            font-weight: 600;
            margin: 20px 0 10px;
            color: #2d3a6e;
        }
        p {
            margin-bottom: 18px;
        }
        .lead {
            font-size: 1.2rem;
            color: var(--text-light);
            font-weight: 400;
            line-height: 1.8;
        }
        .highlight {
            background: #fff7e0;
            padding: 2px 8px;
            border-radius: 6px;
            font-weight: 600;
        }
        .emoji-big {
            font-size: 1.6rem;
            margin-right: 6px;
        }
        .stat-box {
            background: #f0f4ff;
            border-left: 5px solid var(--primary);
            padding: 18px 22px;
            border-radius: 0 12px 12px 0;
            margin: 22px 0;
        }
        .stat-box strong {
            color: var(--secondary);
        }
        .feature-img {
            margin: 28px 0;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        .feature-img figcaption {
            font-size: 0.85rem;
            color: #777;
            text-align: center;
            margin-top: 8px;
            font-style: italic;
        }
        .link-block {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin: 18px 0;
        }
        .link-block a {
            background: #f0f2f7;
            padding: 6px 16px;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 500;
            transition: background 0.2s, transform 0.15s;
        }
        .link-block a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .search-form {
            display: flex;
            gap: 8px;
            margin: 16px 0;
        }
        .search-form input {
            flex: 1;
            padding: 12px 18px;
            border: 2px solid var(--border);
            border-radius: 40px;
            font-size: 0.95rem;
            outline: none;
            transition: border 0.2s;
            background: #fff;
        }
        .search-form input:focus {
            border-color: var(--primary);
        }
        .search-form button {
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: 40px;
            padding: 0 24px;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.2s, transform 0.15s;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .search-form button:hover {
            background: var(--secondary);
            transform: scale(1.02);
        }
        .comment-section,
        .rating-section {
            margin-top: 40px;
            padding-top: 28px;
            border-top: 2px dashed var(--border);
        }
        .comment-section h3,
        .rating-section h3 {
            margin-top: 0;
        }
        .form-group {
            margin-bottom: 16px;
        }
        .form-group label {
            display: block;
            font-weight: 600;
            margin-bottom: 4px;
            font-size: 0.95rem;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 12px 16px;
            border: 2px solid var(--border);
            border-radius: 12px;
            font-size: 0.95rem;
            font-family: var(--font);
            transition: border 0.2s;
            background: #fff;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            border-color: var(--primary);
            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: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s, transform 0.15s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn:hover {
            background: var(--secondary);
            transform: translateY(-2px);
        }
        .rating-stars {
            display: flex;
            gap: 6px;
            font-size: 1.6rem;
            color: #ddd;
            cursor: pointer;
        }
        .rating-stars .star {
            transition: color 0.2s, transform 0.15s;
        }
        .rating-stars .star:hover,
        .rating-stars .star.active {
            color: var(--accent);
            transform: scale(1.15);
        }
        .rating-stars .star:hover~.star {
            color: #ddd;
        }
        .sidebar-link-list {
            list-style: none;
        }
        .sidebar-link-list li {
            padding: 8px 0;
            border-bottom: 1px solid var(--border);
        }
        .sidebar-link-list li:last-child {
            border-bottom: none;
        }
        .sidebar-link-list a {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 500;
        }
        .sidebar-link-list a i {
            width: 20px;
            color: var(--secondary);
        }
        footer {
            background: #1a1a2e;
            color: #ccc;
            padding: 40px 20px 24px;
            margin-top: 40px;
        }
        footer .container {
            max-width: var(--max-width);
            margin: 0 auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 28px;
        }
        @media (max-width: 700px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }
        footer h4 {
            color: #fff;
            margin-bottom: 12px;
            font-size: 1.1rem;
        }
        footer a {
            color: #bbb;
        }
        footer a:hover {
            color: var(--accent);
        }
        footer .copyright {
            border-top: 1px solid #333;
            padding-top: 20px;
            text-align: center;
            font-size: 0.85rem;
            color: #888;
        }
        friend-link {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin: 12px 0;
        }
        friend-link a {
            padding: 6px 14px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: 30px;
            font-size: 0.9rem;
            transition: background 0.2s;
        }
        friend-link a:hover {
            background: rgba(255, 255, 255, 0.14);
        }
        @media (max-width: 768px) {
            .header-inner {
                padding: 10px 16px;
            }
            .my-logo {
                font-size: 1.4rem;
            }
            .nav-toggle {
                display: block;
            }
            nav {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                padding: 12px 0 4px;
                gap: 4px;
            }
            nav.open {
                display: flex;
            }
            nav a {
                padding: 10px 16px;
                border-radius: 8px;
            }
            h1 {
                font-size: 1.9rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            h3 {
                font-size: 1.2rem;
            }
            .content-area {
                padding: 20px 16px;
            }
            .sidebar {
                order: 2;
            }
            .search-form {
                flex-direction: column;
            }
            .search-form button {
                justify-content: center;
                padding: 12px;
            }
            .breadcrumb {
                font-size: 0.75rem;
                padding: 10px 16px;
            }
            .rating-stars {
                font-size: 1.3rem;
            }
        }
        @media (min-width: 769px) {
            nav {
                display: flex !important;
            }
        }
        .badge {
            display: inline-block;
            background: var(--accent);
            color: #1a1a2e;
            font-weight: 700;
            font-size: 0.75rem;
            padding: 2px 12px;
            border-radius: 30px;
            letter-spacing: 0.5px;
        }
        .updated {
            font-size: 0.85rem;
            color: #888;
            display: flex;
            align-items: center;
            gap: 6px;
            margin-bottom: 20px;
        }
        .toc {
            background: #f4f6fc;
            border-radius: var(--radius);
            padding: 18px 22px;
            margin: 20px 0 28px;
        }
        .toc ol {
            padding-left: 20px;
        }
        .toc li {
            margin: 4px 0;
        }
        .toc a {
            color: var(--text);
        }
        .toc a:hover {
            color: var(--secondary);
        }
        blockquote {
            border-left: 4px solid var(--accent);
            padding: 12px 20px;
            margin: 20px 0;
            background: #faf8f0;
            border-radius: 0 12px 12px 0;
            font-style: italic;
            color: #444;
        }
        .table-wrap {
            overflow-x: auto;
            margin: 20px 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.95rem;
        }
        th,
        td {
            padding: 10px 14px;
            border: 1px solid var(--border);
            text-align: left;
        }
        th {
            background: var(--primary);
            color: #fff;
            font-weight: 600;
        }
        tr:nth-child(even) {
            background: #f8faff;
        }
        .gallery {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 16px;
            margin: 24px 0;
        }
        .gallery figure {
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .gallery figure img {
            height: 160px;
            width: 100%;
            object-fit: cover;
        }
        .gallery figcaption {
            padding: 8px 10px;
            font-size: 0.8rem;
            text-align: center;
            background: #fff;
        }