* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        :root {
            --primary: #1a237e; 
            --secondary: #d32f2f; 
            --accent: #ffab00; 
            --light: #f5f5f5;
            --dark: #121212;
            --gray: #757575;
            --shadow: 0 4px 12px rgba(0,0,0,0.1);
            --transition: all 0.3s ease;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: #fafafa;
            color: #333;
            line-height: 1.7;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        a {
            color: var(--secondary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary);
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, var(--primary), #283593);
            color: white;
            padding: 1rem 0;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            letter-spacing: 1px;
            color: white;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
        }
        .my-logo span {
            color: var(--accent);
        }
        .breadcrumb {
            background-color: #e8eaf6;
            padding: 12px 0;
            font-size: 0.9rem;
            margin-bottom: 20px;
        }
        .breadcrumb a {
            color: var(--gray);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 1.8rem;
        }
        .main-nav a {
            color: white;
            font-weight: 600;
            padding: 8px 5px;
            border-radius: 4px;
        }
        .main-nav a:hover {
            background-color: rgba(255, 255, 255, 0.15);
            text-decoration: none;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: white;
        }
        @media (max-width: 768px) {
            .main-nav ul {
                flex-direction: column;
                position: fixed;
                top: 80px;
                left: -100%;
                background-color: var(--primary);
                width: 100%;
                padding: 2rem;
                transition: left 0.5s ease;
                box-shadow: var(--shadow);
                z-index: 999;
            }
            .main-nav.active ul {
                left: 0;
            }
            .hamburger {
                display: block;
            }
        }
        .main-content {
            flex: 1;
            padding: 2rem 0;
        }
        article {
            background-color: white;
            border-radius: 12px;
            padding: 2.5rem;
            box-shadow: var(--shadow);
            margin-bottom: 2rem;
        }
        h1 {
            color: var(--primary);
            font-size: 2.8rem;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 3px solid var(--accent);
            padding-bottom: 15px;
        }
        h2 {
            color: var(--secondary);
            font-size: 2rem;
            margin: 2.5rem 0 1rem;
            padding-top: 10px;
        }
        h3 {
            color: #1a237e;
            font-size: 1.6rem;
            margin: 2rem 0 0.8rem;
        }
        h4 {
            color: var(--gray);
            font-size: 1.3rem;
            margin: 1.5rem 0 0.5rem;
        }
        p {
            margin-bottom: 1.2rem;
            text-align: justify;
        }
        strong {
            color: var(--primary);
            font-weight: 700;
        }
        em {
            color: var(--secondary);
            font-style: italic;
        }
        .highlight-box {
            background: linear-gradient(to right, #e3f2fd, #f3e5f5);
            border-left: 5px solid var(--accent);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
        }
        .image-container {
            margin: 2.5rem auto;
            text-align: center;
        }
        .image-container img {
            border-radius: 10px;
            box-shadow: 0 6px 20px rgba(0,0,0,0.15);
            border: 1px solid #ddd;
            max-width: 800px;
            margin: 0 auto;
        }
        .image-caption {
            font-style: italic;
            color: var(--gray);
            margin-top: 10px;
            font-size: 0.95rem;
        }
        .functionality-section {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin: 3rem 0;
        }
        .search-box, .comment-box, .rating-box {
            background-color: #f8f9fa;
            padding: 1.8rem;
            border-radius: 10px;
            border: 1px solid #dee2e6;
        }
        .functionality-section h3 {
            margin-top: 0;
            color: var(--primary);
        }
        form input, form textarea, form select {
            width: 100%;
            padding: 12px;
            margin-bottom: 15px;
            border: 1px solid #ccc;
            border-radius: 6px;
            font-size: 1rem;
        }
        form button {
            background-color: var(--secondary);
            color: white;
            border: none;
            padding: 12px 24px;
            border-radius: 6px;
            cursor: pointer;
            font-weight: bold;
            transition: var(--transition);
        }
        form button:hover {
            background-color: #b71c1c;
            transform: translateY(-2px);
        }
        .stars {
            display: flex;
            justify-content: center;
            gap: 10px;
            margin: 15px 0;
            font-size: 2rem;
            color: #ffc107;
        }
        .stars i {
            cursor: pointer;
            transition: var(--transition);
        }
        .stars i:hover {
            transform: scale(1.2);
        }
        .related-links {
            background-color: #e8f5e9;
            padding: 1.5rem;
            border-radius: 10px;
            margin: 2.5rem 0;
        }
        .related-links h3 {
            color: #2e7d32;
            margin-top: 0;
        }
        .related-links ul {
            list-style: none;
            columns: 2;
        }
        .related-links li {
            margin-bottom: 10px;
            padding-left: 1.2rem;
            position: relative;
        }
        .related-links li:before {
            content: '⚔️';
            position: absolute;
            left: 0;
        }
        @media (max-width: 600px) {
            .related-links ul {
                columns: 1;
            }
        }
        .site-footer {
            background-color: var(--dark);
            color: #bbb;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section h4 {
            color: #fff;
            margin-bottom: 1.2rem;
            font-size: 1.3rem;
        }
        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            margin-top: 10px;
        }
        .friend-links a {
            background-color: #333;
            color: #bbb;
            padding: 8px 15px;
            border-radius: 20px;
            font-size: 0.9rem;
        }
        .friend-links a:hover {
            background-color: var(--accent);
            color: var(--dark);
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #444;
            font-size: 0.9rem;
            color: #888;
        }
        .update-time {
            color: var(--gray);
            font-size: 0.9rem;
            text-align: right;
            margin-bottom: 1.5rem;
            font-style: italic;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }
        .key-term {
            background-color: #fff9c4;
            padding: 2px 6px;
            border-radius: 3px;
            font-weight: 600;
        }
        .quote {
            font-style: italic;
            border-left: 4px solid var(--accent);
            padding-left: 20px;
            margin: 2rem 0;
            color: #555;
        }
        .table-container {
            overflow-x: auto;
            margin: 2rem 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
        }
        th, td {
            border: 1px solid #ddd;
            padding: 12px;
            text-align: left;
        }
        th {
            background-color: var(--primary);
            color: white;
        }
        tr:nth-child(even) {
            background-color: #f2f2f2;
        }