* { 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%);
            background-attachment: fixed;
            max-width: 100vw;
            overflow-x: hidden;
        }
        a { color: #2980b9; text-decoration: none; transition: color 0.3s ease; }
        a:hover { color: #e74c3c; }
        img { max-width: 100%; height: auto; display: block; }
        ul, ol { padding-left: 2rem; margin-bottom: 1.5rem; }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(90deg, #1a2980, #26d0ce);
            color: white;
            padding: 1.2rem 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: 'Georgia', serif;
            font-size: 2.2rem;
            font-weight: 800;
            color: white;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
            letter-spacing: 1px;
        }
        .my-logo span { color: #f1c40f; }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 1.8rem;
        }
        .main-nav a {
            color: white;
            font-weight: 600;
            font-size: 1.05rem;
            padding: 0.5rem 0.3rem;
            border-bottom: 2px solid transparent;
        }
        .main-nav a:hover, .main-nav a.active {
            border-bottom-color: #f1c40f;
            color: #f1c40f;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        .breadcrumb {
            background-color: #ecf0f1;
            padding: 0.8rem 20px;
            font-size: 0.9rem;
            border-bottom: 1px solid #bdc3c7;
        }
        .breadcrumb a { color: #7f8c8d; }
        .breadcrumb a:hover { color: #2980b9; }
        .breadcrumb i { margin: 0 8px; }
        .search-box {
            background: #34495e;
            padding: 2rem 20px;
            text-align: center;
            margin: 1.5rem 0;
            border-radius: 10px;
        }
        .search-box h3 { color: white; margin-bottom: 1rem; }
        .search-form {
            display: flex;
            max-width: 600px;
            margin: 0 auto;
        }
        .search-input {
            flex: 1;
            padding: 15px;
            border: none;
            border-radius: 5px 0 0 5px;
            font-size: 1rem;
        }
        .search-btn {
            background: #e74c3c;
            color: white;
            border: none;
            padding: 0 25px;
            border-radius: 0 5px 5px 0;
            cursor: pointer;
            font-size: 1rem;
            transition: background 0.3s;
        }
        .search-btn:hover { background: #c0392b; }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
            padding: 2rem 0;
        }
        @media (max-width: 992px) {
            .main-content { grid-template-columns: 1fr; }
        }
        .article-body {
            background: white;
            padding: 2.5rem;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.08);
        }
        .article-body h1 {
            color: #2c3e50;
            font-size: 2.8rem;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 3px solid #2980b9;
            padding-bottom: 1rem;
        }
        .article-body h2 {
            color: #2980b9;
            font-size: 2rem;
            margin: 2.5rem 0 1.2rem;
            padding-top: 1rem;
        }
        .article-body h3 {
            color: #16a085;
            font-size: 1.6rem;
            margin: 2rem 0 1rem;
        }
        .article-body h4 {
            color: #8e44ad;
            font-size: 1.3rem;
            margin: 1.8rem 0 0.8rem;
        }
        .article-body p {
            margin-bottom: 1.5rem;
            text-align: justify;
            font-size: 1.1rem;
        }
        .highlight-box {
            background: #e8f4fc;
            border-left: 5px solid #2980b9;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
        }
        .inline-link {
            font-weight: 700;
            border-bottom: 1px dashed #2980b9;
        }
        .feature-img {
            width: 100%;
            border-radius: 10px;
            margin: 2rem auto;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            border: 5px solid #ecf0f1;
        }
        .last-updated {
            background: #f8f9fa;
            padding: 1rem;
            border-radius: 8px;
            text-align: center;
            font-style: italic;
            color: #7f8c8d;
            margin: 2rem 0;
            border: 1px solid #ddd;
        }
        .sidebar {
            background: white;
            padding: 1.8rem;
            border-radius: 15px;
            box-shadow: 0 5px 20px rgba(0,0,0,0.06);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .sidebar h3 {
            color: #2c3e50;
            border-bottom: 2px solid #1abc9c;
            padding-bottom: 0.7rem;
            margin-bottom: 1.5rem;
        }
        .sidebar ul {
            list-style: none;
            padding-left: 0;
        }
        .sidebar li { margin-bottom: 1rem; }
        .sidebar a {
            display: block;
            padding: 0.8rem;
            background: #f8f9fa;
            border-radius: 5px;
            border-left: 4px solid #3498db;
        }
        .sidebar a:hover {
            background: #e3f2fd;
            border-left-color: #e74c3c;
        }
        .rating-section, .comment-section {
            background: white;
            padding: 2rem;
            border-radius: 15px;
            margin: 2rem 0;
            box-shadow: 0 5px 20px rgba(0,0,0,0.06);
        }
        .rating-form, .comment-form {
            display: flex;
            flex-direction: column;
            gap: 1.2rem;
            max-width: 700px;
        }
        .form-group { display: flex; flex-direction: column; }
        .form-group label { font-weight: 600; margin-bottom: 0.5rem; }
        .form-control {
            padding: 12px;
            border: 1px solid #bdc3c7;
            border-radius: 5px;
            font-size: 1rem;
        }
        .stars { display: flex; gap: 0.5rem; font-size: 1.8rem; }
        .star { color: #ddd; cursor: pointer; }
        .star:hover, .star.active { color: #f39c12; }
        .submit-btn {
            background: #27ae60;
            color: white;
            border: none;
            padding: 15px;
            border-radius: 5px;
            font-size: 1.1rem;
            cursor: pointer;
            transition: background 0.3s;
            align-self: flex-start;
            min-width: 150px;
        }
        .submit-btn:hover { background: #219653; }
        .site-footer {
            background: #2c3e50;
            color: #ecf0f1;
            padding: 3rem 20px 1.5rem;
            margin-top: 3rem;
        }
        .footer-container {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 2rem;
        }
        .footer-section { flex: 1; min-width: 250px; }
        .footer-section h4 {
            color: #1abc9c;
            margin-bottom: 1.5rem;
            font-size: 1.3rem;
        }
        .footer-links { list-style: none; }
        .footer-links li { margin-bottom: 0.8rem; }
        .footer-links a { color: #bdc3c7; }
        .footer-links a:hover { color: #1abc9c; }
        friend-link {
            display: inline-block;
            background: #34495e;
            color: white;
            padding: 8px 15px;
            margin: 5px;
            border-radius: 4px;
            font-size: 0.9rem;
        }
        friend-link a { color: white; }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid #4a6572;
            color: #95a5a6;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .header-container { flex-wrap: wrap; }
            .hamburger { display: block; }
            .main-nav {
                width: 100%;
                max-height: 0;
                overflow: hidden;
                transition: max-height 0.5s ease;
            }
            .main-nav.active { max-height: 400px; margin-top: 1rem; }
            .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; }
            .article-body { padding: 1.5rem; }
            .article-body h1 { font-size: 2.2rem; }
            .article-body h2 { font-size: 1.8rem; }
            .sidebar { position: static; }
        }