:root {
            --primary: #4a6fa5;
            --secondary: #ff66a8;
            --accent: #2ecc71;
            --dark: #2c3e50;
            --light: #ecf0f1;
            --gray: #7f8c8d;
            --shadow: 0 4px 12px rgba(0,0,0,0.1);
            --border-radius: 12px;
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.8;
            color: var(--dark);
            background-color: #f9f9f9;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        ul {
            list-style: none;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--border-radius);
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background-color: white;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
            border-bottom: 1px solid #eee;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 900;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            letter-spacing: -0.5px;
        }
        .my-logo:hover {
            transform: scale(1.03);
        }
        .search-form {
            display: flex;
            max-width: 400px;
            width: 100%;
            margin: 0 30px;
        }
        .search-input {
            flex: 1;
            padding: 12px 20px;
            border: 2px solid var(--primary);
            border-radius: 50px 0 0 50px;
            font-size: 1rem;
            outline: none;
        }
        .search-btn {
            background-color: var(--primary);
            color: white;
            border: none;
            padding: 0 25px;
            border-radius: 0 50px 50px 0;
            cursor: pointer;
            font-size: 1rem;
            transition: var(--transition);
        }
        .search-btn:hover {
            background-color: var(--dark);
        }
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: var(--primary);
            cursor: pointer;
        }
        .main-nav {
            padding: 15px 0;
        }
        .nav-list {
            display: flex;
            justify-content: center;
            gap: 30px;
            flex-wrap: wrap;
        }
        .nav-link {
            font-weight: 600;
            padding: 8px 15px;
            border-radius: 50px;
            position: relative;
        }
        .nav-link:hover {
            background-color: var(--light);
            color: var(--primary);
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 15px;
            right: 15px;
            height: 3px;
            background-color: var(--secondary);
            transform: scaleX(0);
            transition: transform 0.3s ease;
        }
        .nav-link:hover::after {
            transform: scaleX(1);
        }
        .breadcrumb {
            padding: 15px 0;
            font-size: 0.95rem;
            color: var(--gray);
            background-color: var(--light);
        }
        .breadcrumb-list {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .breadcrumb-item:not(:last-child)::after {
            content: '›';
            margin-left: 10px;
            color: var(--primary);
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            padding: 40px 0;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        .article-body {
            background-color: white;
            padding: 40px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .article-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-bottom: 20px;
            margin-bottom: 30px;
            border-bottom: 2px solid var(--light);
            font-size: 0.95rem;
            color: var(--gray);
        }
        .update-time {
            color: var(--accent);
            font-weight: 600;
        }
        h1 {
            font-size: 2.8rem;
            margin-bottom: 25px;
            color: var(--dark);
            line-height: 1.2;
        }
        h2 {
            font-size: 2rem;
            margin: 40px 0 20px;
            color: var(--primary);
            padding-bottom: 10px;
            border-bottom: 2px solid var(--light);
        }
        h3 {
            font-size: 1.6rem;
            margin: 30px 0 15px;
            color: var(--dark);
        }
        h4 {
            font-size: 1.3rem;
            margin: 25px 0 10px;
            color: var(--gray);
        }
        p {
            margin-bottom: 20px;
            text-align: justify;
        }
        .lead {
            font-size: 1.3rem;
            font-weight: 500;
            color: var(--primary);
            background-color: rgba(74, 111, 165, 0.05);
            padding: 20px;
            border-left: 5px solid var(--secondary);
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            margin-bottom: 30px;
        }
        .highlight {
            background-color: #fff9e6;
            padding: 20px;
            border-radius: var(--border-radius);
            border: 1px dashed #ffcc00;
            margin: 25px 0;
        }
        .key-term {
            font-weight: 800;
            color: var(--primary);
        }
        .inline-link {
            color: var(--secondary);
            font-weight: 600;
            border-bottom: 1px dotted var(--secondary);
        }
        .inline-link:hover {
            color: var(--primary);
            border-bottom-style: solid;
        }
        .article-img {
            margin: 30px auto;
            max-width: 800px;
            box-shadow: var(--shadow);
            overflow: hidden;
        }
        .article-img img {
            transition: transform 0.5s ease;
        }
        .article-img:hover img {
            transform: scale(1.03);
        }
        .caption {
            text-align: center;
            font-style: italic;
            color: var(--gray);
            margin-top: 10px;
            font-size: 0.9rem;
        }
        .sidebar {
            position: sticky;
            top: 20px;
            height: fit-content;
        }
        .sidebar-widget {
            background-color: white;
            padding: 25px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            margin-bottom: 30px;
        }
        .sidebar-title {
            font-size: 1.4rem;
            margin-bottom: 20px;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .sidebar-title i {
            color: var(--secondary);
        }
        .rating-widget {
            text-align: center;
        }
        .stars {
            font-size: 1.8rem;
            color: #ffcc00;
            margin: 15px 0;
            cursor: pointer;
        }
        .star:hover {
            transform: scale(1.2);
        }
        .comment-form textarea,
        .comment-form input {
            width: 100%;
            padding: 12px;
            margin-bottom: 15px;
            border: 1px solid #ddd;
            border-radius: var(--border-radius);
            font-family: inherit;
        }
        .comment-form button,
        .score-form button {
            background-color: var(--accent);
            color: white;
            border: none;
            padding: 12px 25px;
            border-radius: 50px;
            cursor: pointer;
            font-weight: 600;
            width: 100%;
            transition: var(--transition);
        }
        .comment-form button:hover,
        .score-form button:hover {
            background-color: #27ae60;
        }
        .related-links a {
            display: block;
            padding: 12px 15px;
            margin-bottom: 10px;
            background-color: var(--light);
            border-radius: var(--border-radius);
            border-left: 4px solid var(--primary);
        }
        .related-links a:hover {
            background-color: rgba(74, 111, 165, 0.1);
            transform: translateX(5px);
        }
        .site-footer {
            background-color: var(--dark);
            color: white;
            padding: 50px 0 20px;
            margin-top: 60px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-logo {
            font-size: 2rem;
            font-weight: 900;
            color: white;
            margin-bottom: 20px;
        }
        .footer-links a {
            display: block;
            padding: 8px 0;
            color: #bdc3c7;
            border-bottom: 1px solid rgba(255,255,255,0.05);
        }
        .footer-links a:hover {
            color: white;
            padding-left: 10px;
        }
        friend-link {
            display: inline-block;
            background-color: rgba(255,255,255,0.1);
            padding: 10px 20px;
            border-radius: 50px;
            margin-right: 15px;
            margin-bottom: 15px;
        }
        friend-link a:hover {
            color: var(--secondary);
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.1);
            color: #95a5a6;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .header-top {
                flex-wrap: wrap;
            }
            .search-form {
                order: 3;
                margin: 20px 0 0;
                max-width: 100%;
            }
            .mobile-toggle {
                display: block;
            }
            .main-nav {
                display: none;
                width: 100%;
                padding-top: 20px;
            }
            .main-nav.active {
                display: block;
            }
            .nav-list {
                flex-direction: column;
                gap: 10px;
            }
            .nav-link {
                display: block;
                text-align: center;
                padding: 15px;
                background-color: var(--light);
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            .article-body {
                padding: 25px;
            }
        }