:root {
            --primary: #4CAF50;
            --secondary: #2196F3;
            --accent: #FF9800;
            --dark: #333;
            --light: #f8f9fa;
            --gray: #6c757d;
            --shadow: 0 4px 12px rgba(0,0,0,0.1);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            line-height: 1.6;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            color: var(--dark);
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 15px;
        }
        a {
            color: var(--secondary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        img {
            max-width: 100%;
            height: auto;
            border-radius: 8px;
            box-shadow: var(--shadow);
        }
        .site-header {
            background: white;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
            padding: 1rem 0;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 0 20px;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            letter-spacing: -1px;
        }
        .my-logo:hover {
            transform: scale(1.03);
        }
        .nav-desktop {
            display: flex;
            gap: 2rem;
        }
        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }
        }
        .nav-desktop a {
            font-weight: 600;
            padding: 8px 12px;
            border-radius: 4px;
        }
        .nav-desktop a:hover {
            background-color: var(--light);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: var(--dark);
            cursor: pointer;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
        }
        .nav-mobile {
            display: none;
            flex-direction: column;
            background: white;
            position: absolute;
            top: 100%;
            left: 0;
            right: 0;
            box-shadow: var(--shadow);
            padding: 1rem;
            z-index: 999;
        }
        .nav-mobile.active {
            display: flex;
        }
        .nav-mobile a {
            padding: 12px 15px;
            border-bottom: 1px solid #eee;
            font-weight: 600;
        }
        .nav-mobile a:last-child {
            border-bottom: none;
        }
        .breadcrumb {
            padding: 1rem 20px;
            background: var(--light);
            border-radius: 8px;
            margin: 1rem 0;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: var(--gray);
        }
        .breadcrumb i {
            margin: 0 8px;
            color: #aaa;
        }
        .main-container {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2rem;
            margin: 2rem 0;
        }
        @media (max-width: 992px) {
            .main-container {
                grid-template-columns: 1fr;
            }
        }
        .content-area {
            background: white;
            padding: 2.5rem;
            border-radius: 12px;
            box-shadow: var(--shadow);
        }
        .sidebar {
            background: white;
            padding: 1.5rem;
            border-radius: 12px;
            box-shadow: var(--shadow);
            height: fit-content;
            position: sticky;
            top: 100px;
        }
        @media (max-width: 992px) {
            .sidebar {
                position: static;
            }
        }
        h1 {
            font-size: 2.8rem;
            color: var(--dark);
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 3px solid var(--accent);
            padding-bottom: 0.5rem;
        }
        h2 {
            font-size: 2rem;
            color: var(--primary);
            margin: 2.5rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #eee;
        }
        h3 {
            font-size: 1.6rem;
            color: var(--secondary);
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.3rem;
            color: var(--dark);
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        strong {
            color: var(--dark);
            font-weight: 700;
        }
        em {
            color: var(--gray);
        }
        blockquote {
            border-left: 4px solid var(--accent);
            padding-left: 1.5rem;
            margin: 2rem 0;
            font-style: italic;
            color: var(--gray);
            background: var(--light);
            padding: 1.5rem;
            border-radius: 0 8px 8px 0;
        }
        ul, ol {
            margin-left: 2rem;
            margin-bottom: 1.5rem;
        }
        li {
            margin-bottom: 0.8rem;
        }
        .code-block {
            background: #2d2d2d;
            color: #f8f8f2;
            padding: 1.5rem;
            border-radius: 8px;
            overflow-x: auto;
            margin: 2rem 0;
            font-family: 'Courier New', monospace;
            font-size: 0.95rem;
        }
        .code-block .keyword { color: #ff79c6; }
        .code-block .function { color: #50fa7b; }
        .code-block .string { color: #f1fa8c; }
        .code-block .comment { color: #6272a4; }
        .feature-box {
            background: linear-gradient(135deg, #e3f2fd, #f3e5f5);
            border-left: 5px solid var(--secondary);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
        }
        .feature-box h4 {
            margin-top: 0;
            color: var(--secondary);
        }
        .search-form {
            display: flex;
            margin-bottom: 2rem;
        }
        .search-input {
            flex: 1;
            padding: 12px 15px;
            border: 2px solid #ddd;
            border-right: none;
            border-radius: 8px 0 0 8px;
            font-size: 1rem;
            transition: var(--transition);
        }
        .search-input:focus {
            outline: none;
            border-color: var(--secondary);
        }
        .search-btn {
            background: var(--secondary);
            color: white;
            border: none;
            padding: 0 20px;
            border-radius: 0 8px 8px 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-btn:hover {
            background: #1976d2;
        }
        .rating-widget {
            background: var(--light);
            padding: 1.5rem;
            border-radius: 8px;
            margin: 2rem 0;
            text-align: center;
        }
        .stars {
            font-size: 1.8rem;
            color: #ffd700;
            margin: 10px 0;
            cursor: pointer;
        }
        .stars i:hover {
            transform: scale(1.2);
        }
        .rating-form input, .comment-form textarea, .comment-form input {
            width: 100%;
            padding: 12px;
            margin: 10px 0;
            border: 1px solid #ddd;
            border-radius: 8px;
            font-family: inherit;
        }
        .rating-form button, .comment-form button {
            background: var(--primary);
            color: white;
            border: none;
            padding: 12px 25px;
            border-radius: 8px;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
            width: 100%;
        }
        .rating-form button:hover, .comment-form button:hover {
            background: #388e3c;
        }
        .comment-section {
            margin-top: 3rem;
            border-top: 2px solid #eee;
            padding-top: 2rem;
        }
        .comment {
            background: var(--light);
            padding: 1.2rem;
            border-radius: 8px;
            margin-bottom: 1.5rem;
        }
        .comment-header {
            display: flex;
            justify-content: space-between;
            margin-bottom: 0.8rem;
            font-size: 0.9rem;
            color: var(--gray);
        }
        .site-footer {
            background: var(--dark);
            color: white;
            padding: 3rem 20px;
            margin-top: 3rem;
            border-radius: 12px 12px 0 0;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }
        friend-link {
            display: block;
            padding: 10px 15px;
            background: rgba(255,255,255,0.1);
            margin: 8px 0;
            border-radius: 6px;
            transition: var(--transition);
        }
        friend-link:hover {
            background: rgba(255,255,255,0.2);
            padding-left: 20px;
        }
        .copyright {
            text-align: center;
            margin-top: 2rem;
            padding-top: 2rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            color: #aaa;
            font-size: 0.9rem;
        }
        .update-time {
            background: #fff3cd;
            color: #856404;
            padding: 10px 15px;
            border-radius: 8px;
            margin: 1rem 0;
            display: inline-block;
            font-size: 0.9rem;
        }
        .tag {
            display: inline-block;
            background: #e9ecef;
            padding: 5px 12px;
            border-radius: 20px;
            margin: 0 5px 5px 0;
            font-size: 0.85rem;
            color: var(--dark);
        }
        .highlight {
            background: linear-gradient(120deg, #a1c4fd80 0%, #c2e9fb80 100%);
            padding: 2px 6px;
            border-radius: 4px;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }
        @media (max-width: 768px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.7rem; }
            h3 { font-size: 1.4rem; }
            .content-area { padding: 1.5rem; }
            .header-container { padding: 0 10px; }
        }