* { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f8f9fa;
            max-width: 100vw;
            overflow-x: hidden;
        }
        img { max-width: 100%; height: auto; display: block; }
        h1, h2, h3, h4 { font-weight: 700; line-height: 1.2; margin-bottom: 0.75rem; color: #2c3e50; }
        h1 { font-size: clamp(2.2rem, 5vw, 3.5rem); margin-top: 1.5rem; }
        h2 { font-size: clamp(1.8rem, 4vw, 2.5rem); margin-top: 2.5rem; padding-bottom: 0.5rem; border-bottom: 2px solid #3498db; }
        h3 { font-size: clamp(1.4rem, 3vw, 1.9rem); margin-top: 2rem; color: #2980b9; }
        h4 { font-size: 1.3rem; margin-top: 1.5rem; color: #16a085; }
        p, li { margin-bottom: 1.2rem; font-size: 1.1rem; }
        a { color: #3498db; text-decoration: none; transition: color 0.3s; }
        a:hover { color: #e74c3c; }
        strong { color: #2c3e50; }
        em { font-style: italic; }
        blockquote {
            border-left: 4px solid #3498db;
            padding-left: 1.5rem;
            margin: 2rem 0;
            font-style: italic;
            color: #555;
            background-color: #f0f7ff;
            padding: 1.5rem;
            border-radius: 0 8px 8px 0;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        main.container { padding-top: 2rem; }
        .site-header {
            background: linear-gradient(135deg, #2c3e50 0%, #3498db 100%);
            color: white;
            padding: 1rem 0;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i { color: #f1c40f; }
        .my-logo a { color: inherit; }
        .my-logo a:hover { text-decoration: underline; }
        .breadcrumb {
            padding: 1rem 0;
            background-color: #ecf0f1;
            font-size: 0.9rem;
        }
        .breadcrumb a { color: #7f8c8d; }
        .breadcrumb a:hover { color: #3498db; }
        .breadcrumb span { color: #95a5a6; }
        .nav-primary {
            display: flex;
            gap: 2rem;
        }
        .nav-primary a {
            color: white;
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
        }
        .nav-primary a:hover { color: #f1c40f; }
        .nav-primary a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: #f1c40f;
            transition: width 0.3s;
        }
        .nav-primary a:hover::after { width: 100%; }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 5px;
        }
        .nav-mobile {
            display: none;
            flex-direction: column;
            background: #2c3e50;
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            padding: 1rem;
            box-shadow: 0 10px 15px rgba(0,0,0,0.2);
        }
        .nav-mobile.active { display: flex; }
        .nav-mobile a {
            color: white;
            padding: 0.8rem;
            border-bottom: 1px solid #34495e;
        }
        .nav-mobile a:last-child { border-bottom: none; }
        .nav-mobile a:hover { background-color: #3498db; }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            margin: 2rem 0;
        }
        @media (max-width: 992px) {
            .content-grid { grid-template-columns: 1fr; }
        }
        .sidebar-widget {
            background: white;
            padding: 1.5rem;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            margin-bottom: 2rem;
        }
        .sidebar-widget h3 { margin-top: 0; font-size: 1.4rem; }
        .search-form { display: flex; margin-bottom: 1.5rem; }
        .search-form input {
            flex-grow: 1;
            padding: 0.8rem 1rem;
            border: 2px solid #ddd;
            border-radius: 8px 0 0 8px;
            font-size: 1rem;
        }
        .search-form button {
            background-color: #3498db;
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: 0 8px 8px 0;
            cursor: pointer;
            font-weight: 600;
            transition: background 0.3s;
        }
        .search-form button:hover { background-color: #2980b9; }
        .rating-form, .comment-form {
            background: white;
            padding: 2rem;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            margin: 3rem 0;
        }
        .form-group { margin-bottom: 1.5rem; }
        label { display: block; margin-bottom: 0.5rem; font-weight: 600; }
        input[type="text"],
        input[type="email"],
        textarea,
        select {
            width: 100%;
            padding: 0.8rem;
            border: 2px solid #ddd;
            border-radius: 8px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: #3498db;
        }
        textarea { min-height: 150px; resize: vertical; }
        .stars { display: flex; gap: 5px; font-size: 1.8rem; color: #ddd; cursor: pointer; }
        .stars .active { color: #f1c40f; }
        .submit-btn {
            background-color: #2ecc71;
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 8px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.3s;
        }
        .submit-btn:hover { background-color: #27ae60; }
        .article-content {
            background: white;
            padding: 2.5rem;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.08);
        }
        .article-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-bottom: 1.5rem;
            margin-bottom: 2rem;
            border-bottom: 1px solid #eee;
            font-size: 0.95rem;
            color: #7f8c8d;
        }
        .update-time { font-weight: 600; color: #e74c3c; }
        .featured-img {
            width: 100%;
            border-radius: 10px;
            margin: 2rem 0;
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        }
        .article-content ul, .article-content ol {
            padding-left: 2rem;
            margin-bottom: 1.5rem;
        }
        .article-content li { margin-bottom: 0.7rem; }
        .tip-box {
            background-color: #fffde7;
            border-left: 5px solid #f1c40f;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
        }
        .tip-box strong { color: #e67e22; }
        .internal-links {
            background-color: #e8f4fc;
            padding: 1.5rem;
            border-radius: 10px;
            margin: 2rem 0;
        }
        .internal-links h3 { margin-top: 0; }
        .internal-links ul { list-style-type: none; padding-left: 0; }
        .internal-links li { margin-bottom: 0.8rem; }
        .internal-links a { font-weight: 600; }
        .site-footer {
            background-color: #2c3e50;
            color: #ecf0f1;
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
        }
        .footer-content {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section { flex: 1; min-width: 250px; }
        .footer-section h3 {
            color: #f1c40f;
            border-bottom: 2px solid #34495e;
            padding-bottom: 0.5rem;
            margin-bottom: 1.5rem;
        }
        .footer-links { list-style: none; }
        .footer-links li { margin-bottom: 0.8rem; }
        .footer-links a { color: #bdc3c7; }
        .footer-links a:hover { color: #3498db; }
        friend-link {
            display: block;
            font-weight: bold;
            color: #1abc9c;
            margin-bottom: 0.5rem;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #34495e;
            color: #95a5a6;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .nav-primary { display: none; }
            .hamburger { display: block; }
            .header-content { padding: 0 15px; }
            .article-content { padding: 1.5rem; }
            .content-grid { gap: 2rem; }
            .article-meta { flex-direction: column; align-items: flex-start; gap: 10px; }
        }