* { 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: #333;
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            background-attachment: fixed;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        img { max-width: 100%; height: auto; display: block; }
        .site-header {
            background: linear-gradient(90deg, #6a11cb 0%, #2575fc 100%);
            color: white;
            padding: 1.2rem 0;
            box-shadow: 0 4px 20px rgba(0,0,0,0.15);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo a {
            font-size: 2.2rem;
            font-weight: 900;
            color: white;
            text-decoration: none;
            text-transform: uppercase;
            letter-spacing: 2px;
            font-family: 'Arial Black', sans-serif;
            text-shadow: 3px 3px 0 #ff6b6b;
            transition: text-shadow 0.3s ease;
        }
        .logo a:hover { text-shadow: 3px 3px 0 #4ecdc4; }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            font-size: 1.1rem;
            padding: 0.5rem 1rem;
            border-radius: 30px;
            transition: all 0.3s ease;
        }
        .main-nav a:hover, .main-nav a.active {
            background: rgba(255, 255, 255, 0.25);
            transform: translateY(-3px);
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: white;
        }
        .search-box {
            display: flex;
            margin-left: 2rem;
        }
        .search-box input {
            padding: 0.7rem 1rem;
            border: none;
            border-radius: 30px 0 0 30px;
            width: 250px;
            font-size: 1rem;
        }
        .search-box button {
            background: #ff6b6b;
            color: white;
            border: none;
            border-radius: 0 30px 30px 0;
            padding: 0 1.5rem;
            cursor: pointer;
            transition: background 0.3s;
        }
        .search-box button:hover { background: #ff5252; }
        .breadcrumb {
            padding: 1rem 0;
            background: #e9f1ff;
            font-size: 0.95rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            gap: 0.7rem;
        }
        .breadcrumb a { color: #2575fc; text-decoration: none; }
        .breadcrumb a:hover { text-decoration: underline; }
        .breadcrumb li:not(:last-child)::after {
            content: '>';
            margin-left: 0.7rem;
            color: #888;
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            margin: 3rem auto;
        }
        @media (max-width: 992px) {
            .main-content { grid-template-columns: 1fr; }
        }
        article {
            background: white;
            padding: 3rem;
            border-radius: 20px;
            box-shadow: 0 15px 35px rgba(50, 50, 93, 0.1), 0 5px 15px rgba(0, 0, 0, 0.07);
        }
        h1 {
            font-size: 2.8rem;
            color: #2d3436;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-left: 6px solid #6a11cb;
            padding-left: 1.5rem;
        }
        h2 {
            font-size: 2rem;
            color: #2575fc;
            margin: 2.5rem 0 1.5rem;
            padding-bottom: 0.7rem;
            border-bottom: 3px dashed #dfe6e9;
        }
        h3 {
            font-size: 1.6rem;
            color: #6a11cb;
            margin: 2rem 0 1rem;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
            color: #444;
        }
        .lead {
            font-size: 1.3rem;
            color: #2d3436;
            font-weight: 600;
            background: #f8f9fa;
            padding: 1.5rem;
            border-radius: 10px;
            border-left: 5px solid #ff6b6b;
        }
        .highlight {
            background: linear-gradient(120deg, #a8edea 0%, #fed6e3 100%);
            padding: 2rem;
            border-radius: 15px;
            margin: 2rem 0;
            border: 2px solid #74b9ff;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin: 2rem 0;
        }
        .stat-card {
            background: white;
            padding: 1.5rem;
            border-radius: 10px;
            box-shadow: 0 7px 15px rgba(0,0,0,0.05);
            text-align: center;
            border-top: 5px solid #6a11cb;
            transition: transform 0.3s;
        }
        .stat-card:hover { transform: translateY(-10px); }
        .stat-card i { font-size: 2.5rem; color: #6a11cb; margin-bottom: 1rem; }
        .stat-card h4 { font-size: 1.2rem; margin-bottom: 0.5rem; color: #2d3436; }
        .stat-card p { font-size: 2rem; font-weight: 900; color: #2575fc; }
        .article-img {
            margin: 2.5rem auto;
            border-radius: 15px;
            overflow: hidden;
            box-shadow: 0 15px 30px rgba(0,0,0,0.15);
            max-width: 900px;
            border: 5px solid white;
        }
        .article-img figcaption {
            text-align: center;
            font-style: italic;
            padding: 1rem;
            background: #f8f9fa;
            color: #666;
        }
        .sidebar {
            background: white;
            padding: 2rem;
            border-radius: 20px;
            box-shadow: 0 10px 25px rgba(0,0,0,0.08);
            align-self: start;
            position: sticky;
            top: 140px;
        }
        .sidebar h3 {
            color: #2d3436;
            border-left: 4px solid #ff6b6b;
            padding-left: 1rem;
            margin-top: 0;
        }
        .sidebar ul {
            list-style: none;
            margin: 1.5rem 0;
        }
        .sidebar li {
            padding: 0.8rem 0;
            border-bottom: 1px solid #eee;
        }
        .sidebar a {
            color: #555;
            text-decoration: none;
            transition: color 0.3s, padding-left 0.3s;
        }
        .sidebar a:hover {
            color: #2575fc;
            padding-left: 10px;
        }
        .sidebar .download-btn {
            display: block;
            background: linear-gradient(90deg, #6a11cb, #2575fc);
            color: white;
            text-align: center;
            padding: 1.2rem;
            border-radius: 10px;
            text-decoration: none;
            font-weight: bold;
            font-size: 1.2rem;
            margin-top: 1.5rem;
            transition: transform 0.3s, box-shadow 0.3s;
        }
        .sidebar .download-btn:hover {
            transform: scale(1.05);
            box-shadow: 0 10px 20px rgba(106, 17, 203, 0.3);
        }
        .user-interaction {
            background: #f8f9ff;
            padding: 2.5rem;
            border-radius: 15px;
            margin: 3rem 0;
            border: 2px solid #c3cfe2;
        }
        .rating-section, .comment-section {
            margin-bottom: 2.5rem;
        }
        .stars {
            display: flex;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .stars i {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.3s;
        }
        .stars i:hover, .stars i.active { color: #ffd700; }
        form label {
            display: block;
            margin: 1rem 0 0.5rem;
            font-weight: 600;
        }
        form input, form textarea {
            width: 100%;
            padding: 1rem;
            border: 2px solid #c3cfe2;
            border-radius: 10px;
            font-family: inherit;
            font-size: 1rem;
            transition: border 0.3s;
        }
        form input:focus, form textarea:focus {
            outline: none;
            border-color: #6a11cb;
        }
        form button {
            background: #6a11cb;
            color: white;
            border: none;
            padding: 1rem 2.5rem;
            border-radius: 30px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            margin-top: 1.5rem;
            transition: background 0.3s, transform 0.3s;
        }
        form button:hover {
            background: #2575fc;
            transform: translateY(-3px);
        }
        .web-links {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 1.5rem;
            margin: 3rem 0;
            padding: 2rem;
            background: white;
            border-radius: 15px;
            box-shadow: 0 10px 20px rgba(0,0,0,0.05);
        }
        .web-link {
            background: #f8f9ff;
            padding: 1rem;
            border-radius: 8px;
            border-left: 4px solid #2575fc;
        }
        .web-link a {
            color: #2d3436;
            text-decoration: none;
            font-weight: 500;
            transition: color 0.3s;
        }
        .web-link a:hover { color: #6a11cb; }
        .site-footer {
            background: #2d3436;
            color: #dfe6e9;
            padding: 3rem 0 1.5rem;
            text-align: center;
        }
        .footer-container {
            display: flex;
            flex-direction: column;
            align-items: center;
        }
        .copyright {
            margin-top: 2rem;
            padding-top: 1.5rem;
            border-top: 1px solid #555;
            width: 100%;
            font-size: 0.95rem;
            color: #aaa;
        }
        @media (max-width: 768px) {
            .header-container { flex-wrap: wrap; }
            .main-nav {
                order: 3;
                width: 100%;
                margin-top: 1.5rem;
                display: none;
            }
            .main-nav.active { display: block; }
            .main-nav ul {
                flex-direction: column;
                gap: 1rem;
            }
            .hamburger { display: block; }
            .search-box {
                margin: 1rem 0 0;
                width: 100%;
            }
            .search-box input { width: 100%; }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            article { padding: 2rem; }
        }