* { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #2c3e50;
            background: linear-gradient(135deg, #f5f7fa 0%, #e4edf5 100%);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a { color: #3498db; text-decoration: none; transition: color 0.3s; }
        a:hover { color: #1d6fa5; }
        img { max-width: 100%; height: auto; display: block; }
        .container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }
        .site-header {
            background: linear-gradient(90deg, #1a237e, #311b92);
            color: white;
            padding: 1rem 0;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container { display: flex; justify-content: space-between; align-items: center; }
        .my-logo {
            font-family: 'Impact', fantasy;
            font-size: 2.2rem;
            font-weight: bold;
            color: #ffcc00;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
            letter-spacing: 1px;
        }
        .my-logo span { color: #4fc3f7; }
        .my-logo:hover { color: #ffd740; }
        .main-nav ul { display: flex; list-style: none; }
        .main-nav li { margin-left: 1.8rem; }
        .main-nav a {
            color: #e3f2fd;
            font-weight: 600;
            padding: 0.5rem 0.8rem;
            border-radius: 4px;
            font-size: 1.05rem;
        }
        .main-nav a:hover, .main-nav a.active {
            background-color: rgba(255, 255, 255, 0.15);
            color: #fff;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        .breadcrumb {
            background-color: #e8f4fc;
            padding: 0.8rem 0;
            font-size: 0.9rem;
            border-bottom: 1px solid #d1e3f1;
        }
        .breadcrumb a { color: #555; }
        .breadcrumb a:hover { color: #1a237e; }
        .breadcrumb span { color: #777; margin: 0 5px; }
        main { flex: 1; padding: 2rem 0; }
        article { background: white; border-radius: 12px; padding: 2.5rem; box-shadow: 0 6px 20px rgba(0,0,0,0.08); margin-bottom: 2rem; }
        h1 {
            font-size: 2.8rem;
            color: #1a237e;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 3px solid #ffcc00;
            padding-bottom: 0.8rem;
        }
        h2 { font-size: 2rem; color: #311b92; margin: 2.5rem 0 1rem; padding-bottom: 0.5rem; border-bottom: 2px dashed #b39ddb; }
        h3 { font-size: 1.6rem; color: #4527a0; margin: 2rem 0 1rem; }
        h4 { font-size: 1.3rem; color: #5e35b1; margin: 1.5rem 0 0.8rem; }
        p { margin-bottom: 1.5rem; font-size: 1.1rem; }
        .lead { font-size: 1.3rem; color: #555; font-weight: 500; margin-bottom: 2rem; }
        strong { color: #1a237e; }
        em { color: #d81b60; }
        blockquote {
            border-left: 5px solid #4fc3f7;
            padding-left: 1.5rem;
            margin: 2rem 0;
            font-style: italic;
            color: #555;
            background-color: #f8fdff;
            padding: 1.5rem;
            border-radius: 0 8px 8px 0;
        }
        .highlight-box {
            background: linear-gradient(135deg, #e3f2fd, #f3e5f5);
            border-left: 5px solid #673ab7;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
        }
        ul, ol { margin-left: 2rem; margin-bottom: 1.5rem; }
        li { margin-bottom: 0.7rem; }
        .img-container {
            margin: 2.5rem auto;
            text-align: center;
            max-width: 800px;
        }
        .img-container img {
            border-radius: 10px;
            box-shadow: 0 8px 16px rgba(0,0,0,0.1);
            border: 1px solid #ddd;
        }
        .img-caption {
            font-style: italic;
            color: #666;
            margin-top: 0.8rem;
            font-size: 0.95rem;
        }
        .last-updated {
            background-color: #fff8e1;
            padding: 1rem;
            border-radius: 8px;
            margin-top: 3rem;
            text-align: center;
            font-weight: bold;
            color: #5d4037;
            border: 1px solid #ffd54f;
        }
        .interactive-module {
            background: #f9f9f9;
            border: 2px solid #e0e0e0;
            border-radius: 10px;
            padding: 2rem;
            margin: 3rem 0;
        }
        .module-title { font-size: 1.5rem; color: #1a237e; margin-bottom: 1.5rem; text-align: center; }
        .search-form, .comment-form, .rating-form {
            display: grid;
            gap: 1rem;
            max-width: 600px;
            margin: 0 auto;
        }
        .form-group { display: flex; flex-direction: column; }
        label { font-weight: 600; margin-bottom: 0.5rem; color: #333; }
        input, textarea, select {
            padding: 0.9rem;
            border: 1px solid #ccc;
            border-radius: 6px;
            font-family: inherit;
            font-size: 1rem;
            transition: border 0.3s;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: #3498db;
            box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
        }
        button, .btn {
            background: linear-gradient(90deg, #1a237e, #311b92);
            color: white;
            border: none;
            padding: 1rem 1.8rem;
            border-radius: 6px;
            font-weight: bold;
            font-size: 1rem;
            cursor: pointer;
            transition: all 0.3s;
            text-align: center;
        }
        button:hover, .btn:hover {
            background: linear-gradient(90deg, #311b92, #4527a0);
            transform: translateY(-2px);
            box-shadow: 0 6px 12px rgba(0,0,0,0.15);
        }
        .stars { display: flex; justify-content: center; gap: 0.5rem; margin: 1rem 0; }
        .star { font-size: 2rem; color: #ddd; cursor: pointer; transition: color 0.2s; }
        .star:hover, .star.active { color: #ffcc00; }
        .site-footer {
            background: #1a1a2e;
            color: #eee;
            padding: 3rem 0 1.5rem;
            margin-top: auto;
        }
        .footer-container { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 2rem; }
        .footer-logo { font-size: 1.8rem; color: #ffcc00; margin-bottom: 1rem; }
        .footer-section h3 { color: #4fc3f7; margin-bottom: 1.5rem; font-size: 1.3rem; }
        .footer-links { list-style: none; }
        .footer-links li { margin-bottom: 0.7rem; }
        .footer-links a { color: #b0bec5; }
        .footer-links a:hover { color: #4fc3f7; }
        friend-link {
            display: inline-block;
            background: #0f3460;
            color: #fff;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            margin-right: 0.8rem;
            margin-bottom: 0.8rem;
            font-size: 0.9rem;
        }
        friend-link a { color: #fff; }
        friend-link:hover { background: #16213e; }
        .copyright {
            text-align: center;
            margin-top: 3rem;
            padding-top: 1.5rem;
            border-top: 1px solid #333;
            color: #aaa;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            .header-container { flex-wrap: wrap; }
            .main-nav ul { flex-direction: column; width: 100%; background: #1a237e; position: absolute; top: 100%; left: 0; display: none; padding: 1rem 0; box-shadow: 0 10px 15px rgba(0,0,0,0.1); }
            .main-nav.active ul { display: flex; }
            .main-nav li { margin: 0; }
            .main-nav a { display: block; padding: 1rem 2rem; border-bottom: 1px solid rgba(255,255,255,0.1); }
            .hamburger { display: block; }
            h1 { font-size: 2.2rem; }
            article { padding: 1.8rem; }
        }
        @media (max-width: 576px) {
            .container { padding: 0 15px; }
            h1 { font-size: 1.8rem; }
            h2 { font-size: 1.6rem; }
            .interactive-module { padding: 1.5rem; }
            .footer-container { grid-template-columns: 1fr; }
        }