* { margin: 0; padding: 0; box-sizing: border-box; }
        :root {
            --primary: #1a73e8;
            --secondary: #34a853;
            --accent: #fbbc04;
            --dark: #0f1419;
            --light: #f8f9fa;
            --gray: #5f6368;
            --transition: all 0.3s ease;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            --border-radius: 8px;
        }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #333;
            background-color: var(--light);
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 15px;
        }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--accent); text-decoration: underline; }
        img { max-width: 100%; height: auto; display: block; }
        ul, ol { padding-left: 1.5rem; margin-bottom: 1.5rem; }
        .container { width: 100%; padding-right: 15px; padding-left: 15px; margin-right: auto; margin-left: auto; }
        .site-header {
            background: linear-gradient(135deg, var(--dark) 0%, #2d3748 100%);
            color: white;
            padding: 1.2rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-family: 'Arial Black', Impact, sans-serif;
            font-size: 2.2rem;
            background: linear-gradient(to right, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-shadow: 0 2px 4px rgba(0,0,0,0.2);
        }
        .my-logo a { background: none; -webkit-text-fill-color: inherit; }
        .my-logo a:hover { text-decoration: none; opacity: 0.9; }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: white;
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a:hover { color: var(--accent); text-decoration: none; }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: var(--accent);
            transition: width 0.3s;
        }
        .main-nav a:hover::after { width: 100%; }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
            padding: 0.5rem;
        }
        .mobile-nav {
            display: none;
            flex-direction: column;
            background: var(--dark);
            padding: 1rem;
            position: absolute;
            top: 100%;
            left: 0;
            right: 0;
            box-shadow: var(--shadow);
        }
        .mobile-nav.active { display: flex; }
        .mobile-nav a {
            color: white;
            padding: 0.8rem;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }
        .mobile-nav a:hover { background: rgba(255,255,255,0.05); }
        .breadcrumb {
            padding: 1rem 0;
            font-size: 0.9rem;
            color: var(--gray);
            background-color: #f1f3f4;
            border-radius: var(--border-radius);
            margin: 1rem 0;
            padding-left: 1rem;
        }
        .breadcrumb a { color: var(--gray); }
        .breadcrumb a:hover { color: var(--primary); }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
            margin: 2rem 0;
        }
        @media (max-width: 992px) {
            .content-grid { grid-template-columns: 1fr; }
        }
        article {
            background: white;
            padding: 2.5rem;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .article-header { margin-bottom: 2rem; }
        .article-meta {
            color: var(--gray);
            font-size: 0.95rem;
            margin-bottom: 0.5rem;
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
        }
        .update-time { color: var(--secondary); font-weight: 600; }
        h1 {
            font-size: 2.8rem;
            color: var(--dark);
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-left: 5px solid var(--primary);
            padding-left: 1rem;
        }
        h2 {
            font-size: 2rem;
            margin: 2.5rem 0 1.2rem;
            color: var(--primary);
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #eee;
        }
        h3 {
            font-size: 1.6rem;
            margin: 2rem 0 1rem;
            color: var(--secondary);
        }
        h4 {
            font-size: 1.3rem;
            margin: 1.5rem 0 0.8rem;
            color: var(--accent);
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .intro {
            font-size: 1.2rem;
            background: #e8f0fe;
            padding: 1.5rem;
            border-radius: var(--border-radius);
            border-left: 4px solid var(--primary);
            margin-bottom: 2rem;
        }
        .highlight {
            background: linear-gradient(120deg, #fff9c4 0%, #fff9c4 100%);
            padding: 1.5rem;
            border-radius: var(--border-radius);
            border-left: 4px solid var(--accent);
            margin: 2rem 0;
        }
        .featured-img {
            width: 100%;
            margin: 2.5rem auto;
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: 0 8px 20px rgba(0,0,0,0.15);
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: var(--gray);
            margin-top: 0.5rem;
            font-size: 0.95rem;
        }
        .sidebar {
            background: white;
            padding: 2rem;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            align-self: start;
            position: sticky;
            top: 100px;
        }
        .sidebar h3 {
            color: var(--dark);
            margin-top: 0;
        }
        .widget {
            margin-bottom: 2.5rem;
        }
        .search-form {
            display: flex;
            margin-bottom: 1.5rem;
        }
        .search-form input {
            flex: 1;
            padding: 0.8rem 1rem;
            border: 2px solid #ddd;
            border-radius: var(--border-radius) 0 0 var(--border-radius);
            font-size: 1rem;
        }
        .search-form button {
            background: var(--primary);
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            cursor: pointer;
            font-size: 1.2rem;
        }
        .search-form button:hover { background: #0d62d9; }
        .rating-widget { text-align: center; }
        .stars {
            font-size: 2rem;
            color: #ddd;
            margin: 1rem 0;
            cursor: pointer;
        }
        .stars .fa { margin: 0 0.1rem; transition: var(--transition); }
        .stars .fa:hover { transform: scale(1.2); }
        .stars .active { color: var(--accent); }
        .rating-form button {
            background: var(--secondary);
            color: white;
            border: none;
            padding: 0.8rem 2rem;
            border-radius: var(--border-radius);
            cursor: pointer;
            width: 100%;
            font-weight: 600;
            margin-top: 1rem;
        }
        .comment-form textarea {
            width: 100%;
            padding: 1rem;
            border: 2px solid #ddd;
            border-radius: var(--border-radius);
            font-family: inherit;
            font-size: 1rem;
            margin-bottom: 1rem;
            min-height: 150px;
            resize: vertical;
        }
        .comment-form button {
            background: var(--primary);
            color: white;
            border: none;
            padding: 0.9rem 2rem;
            border-radius: var(--border-radius);
            cursor: pointer;
            font-weight: 600;
            width: 100%;
        }
        .related-links ul {
            list-style: none;
            padding-left: 0;
        }
        .related-links li {
            margin-bottom: 0.8rem;
            padding: 0.8rem;
            background: #f8f9fa;
            border-radius: var(--border-radius);
            transition: var(--transition);
        }
        .related-links li:hover {
            background: #e9ecef;
            transform: translateX(5px);
        }
        .site-footer {
            background: var(--dark);
            color: white;
            padding: 3rem 0 2rem;
            margin-top: 3rem;
            border-radius: var(--border-radius) var(--border-radius) 0 0;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }
        .footer-widget h4 {
            color: var(--accent);
            margin-bottom: 1.5rem;
            font-size: 1.3rem;
        }
        friend-link {
            display: block;
            margin-bottom: 0.8rem;
            padding: 0.7rem;
            background: rgba(255,255,255,0.05);
            border-radius: var(--border-radius);
            transition: var(--transition);
        }
        friend-link:hover {
            background: rgba(255,255,255,0.1);
            padding-left: 1rem;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            color: #aaa;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .header-container { flex-wrap: wrap; }
            .main-nav { display: none; }
            .hamburger { display: block; }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            h3 { font-size: 1.5rem; }
            article, .sidebar { padding: 1.5rem; }
            .content-grid { gap: 1.5rem; }
        }