* { 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-color: #f8f9fa;
            max-width: 100vw;
            overflow-x: hidden;
        }
        a { color: #0056b3; text-decoration: none; transition: color 0.3s ease; }
        a:hover { color: #ff6600; }
        img { max-width: 100%; height: auto; display: block; }
        .site-header {
            background: linear-gradient(135deg, #1a237e 0%, #311b92 100%);
            color: white;
            padding: 1rem 2rem;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            max-width: 1400px;
            margin: 0 auto;
        }
        .my-logo {
            font-family: 'Impact', 'Arial Black', sans-serif;
            font-size: 2.2rem;
            font-weight: bold;
            letter-spacing: 1px;
            background: linear-gradient(to right, #ffd700, #ffec5f);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            text-shadow: 0 2px 4px rgba(0,0,0,0.2);
        }
        .my-logo a { background: transparent; }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: #e0e0e0;
            font-weight: 500;
            padding: 0.5rem 0;
            border-bottom: 2px solid transparent;
        }
        .main-nav a:hover, .main-nav a.active {
            color: #ffd700;
            border-bottom-color: #ffd700;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .breadcrumb {
            background-color: #e9ecef;
            padding: 0.8rem 2rem;
            font-size: 0.9rem;
            border-bottom: 1px solid #ddd;
        }
        .breadcrumb a { color: #555; }
        .breadcrumb a:hover { color: #1a237e; }
        .breadcrumb span { color: #777; }
        .container {
            display: grid;
            grid-template-columns: 1fr minmax(300px, 350px);
            gap: 3rem;
            max-width: 1400px;
            margin: 2rem auto;
            padding: 0 2rem;
        }
        .main-content { background: white; padding: 2.5rem; border-radius: 12px; box-shadow: 0 5px 20px rgba(0,0,0,0.05); }
        .sidebar {
            background: white;
            padding: 1.8rem;
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        h1 {
            font-size: 2.8rem;
            color: #1a237e;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-left: 5px solid #ffd700;
            padding-left: 1rem;
        }
        h2 {
            font-size: 2rem;
            color: #311b92;
            margin: 2.5rem 0 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #eee;
        }
        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; text-align: justify; }
        .lead {
            font-size: 1.25rem;
            color: #555;
            font-weight: 500;
            background: #f8f9fa;
            padding: 1.5rem;
            border-radius: 8px;
            border-left: 4px solid #0056b3;
        }
        .highlight {
            background-color: #fff9c4;
            padding: 1.5rem;
            border-radius: 8px;
            border: 1px dashed #ffd700;
            margin: 2rem 0;
        }
        em { font-style: italic; }
        strong { color: #1a237e; }
        blockquote {
            border-left: 4px solid #ff6600;
            padding-left: 1.5rem;
            margin: 2rem 0;
            color: #555;
            font-style: italic;
        }
        .search-box, .comment-form, .rating-form {
            background: #f1f8ff;
            padding: 1.8rem;
            border-radius: 10px;
            margin: 2.5rem 0;
            border: 1px solid #cfe2ff;
        }
        .form-group { margin-bottom: 1.2rem; }
        label { display: block; margin-bottom: 0.5rem; font-weight: 600; color: #333; }
        input, textarea, select {
            width: 100%;
            padding: 0.8rem;
            border: 1px solid #bbb;
            border-radius: 6px;
            font-family: inherit;
            font-size: 1rem;
        }
        button, .btn {
            background: linear-gradient(to right, #ff9800, #ff5722);
            color: white;
            border: none;
            padding: 0.9rem 1.8rem;
            border-radius: 6px;
            font-weight: bold;
            cursor: pointer;
            transition: transform 0.2s, box-shadow 0.2s;
            display: inline-block;
        }
        button:hover, .btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 12px rgba(255, 87, 34, 0.3);
        }
        .stars { color: #ffd700; font-size: 1.5rem; cursor: pointer; }
        .stars span:hover { color: #ff9800; }
        .article-img {
            width: 80%;
            margin: 2rem auto;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 8px 20px rgba(0,0,0,0.15);
        }
        .article-img figcaption {
            text-align: center;
            font-style: italic;
            color: #666;
            padding: 0.8rem;
            background: #f9f9f9;
        }
        .module { margin-bottom: 2.5rem; }
        .module h3 { font-size: 1.4rem; color: #1a237e; border-left: 4px solid #ff9800; padding-left: 0.8rem; }
        .link-list { list-style: none; }
        .link-list li { margin-bottom: 0.8rem; padding-bottom: 0.8rem; border-bottom: 1px dotted #ddd; }
        .link-list a:before { content: "▶"; margin-right: 0.8rem; color: #ff9800; font-size: 0.8rem; }
        .site-footer {
            background: #1a1a1a;
            color: #ccc;
            padding: 3rem 2rem 1.5rem;
            margin-top: 4rem;
        }
        .footer-container {
            max-width: 1400px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
        }
        .footer-logo { font-size: 1.8rem; color: #ffd700; margin-bottom: 1rem; }
        friend-link {
            display: block;
            background: #2a2a2a;
            padding: 1.2rem;
            border-radius: 6px;
            margin-bottom: 1rem;
            border-left: 4px solid #ff9800;
        }
        friend-link a { color: #ffcc80; }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid #444;
            color: #aaa;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            .container { grid-template-columns: 1fr; }
            .sidebar { position: static; }
            h1 { font-size: 2.4rem; }
        }
        @media (max-width: 768px) {
            .header-container { flex-wrap: wrap; }
            .main-nav { display: none; width: 100%; order: 3; margin-top: 1rem; }
            .main-nav.active { display: block; }
            .main-nav ul { flex-direction: column; gap: 0; }
            .main-nav li { border-bottom: 1px solid rgba(255,255,255,0.1); }
            .main-nav a { display: block; padding: 1rem; }
            .hamburger { display: block; }
            .container { padding: 0 1rem; }
            .main-content, .sidebar { padding: 1.5rem; }
            .article-img { width: 100%; }
        }
        @media (max-width: 480px) {
            h1 { font-size: 2rem; }
            h2 { font-size: 1.7rem; }
            .site-header { padding: 1rem; }
        }