* { 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: #333;
            background: linear-gradient(135deg, #f5f7fa 0%, #e4e8f0 100%);
            min-height: 100vh;
            padding-bottom: 40px;
        }
        img { max-width: 100%; height: auto; display: block; }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .main-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 30px;
        }
        @media (min-width: 992px) {
            .main-grid {
                grid-template-columns: 3fr 1fr;
            }
        }
        .site-header {
            background: linear-gradient(90deg, #1a237e 0%, #283593 50%, #3949ab 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-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .my-logo {
            font-family: 'Arial Black', sans-serif;
            font-size: 2.2rem;
            font-weight: 900;
            text-decoration: none;
            color: #FFD700;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
            display: flex;
            align-items: center;
            gap: 10px;
            transition: transform 0.3s ease;
        }
        .my-logo:hover {
            transform: scale(1.05);
        }
        .my-logo i { font-size: 2.5rem; }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 25px;
            flex-wrap: wrap;
        }
        .main-nav a {
            color: #fff;
            text-decoration: none;
            font-weight: 600;
            padding: 8px 12px;
            border-radius: 5px;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .main-nav a:hover, .main-nav a.active {
            background-color: rgba(255, 255, 255, 0.15);
            color: #FFD700;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 5px;
        }
        .breadcrumb {
            padding: 15px 0;
            background-color: #e8eaf6;
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .breadcrumb li { display: inline; }
        .breadcrumb li:not(:last-child)::after {
            content: '›';
            margin-left: 10px;
            color: #5c6bc0;
        }
        .breadcrumb a {
            color: #3949ab;
            text-decoration: none;
        }
        .breadcrumb a:hover { text-decoration: underline; }
        .content-card {
            background: white;
            border-radius: 15px;
            padding: 30px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
            margin-top: 20px;
        }
        .article-header {
            border-bottom: 3px solid #FFD700;
            padding-bottom: 20px;
            margin-bottom: 30px;
        }
        h1 {
            font-size: 2.8rem;
            color: #1a237e;
            margin-bottom: 15px;
            line-height: 1.2;
        }
        .article-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 15px;
            color: #666;
            font-size: 0.95rem;
        }
        .update-time {
            background: #e8f5e9;
            padding: 5px 10px;
            border-radius: 5px;
            font-weight: 600;
        }
        h2, h3, h4 {
            color: #283593;
            margin-top: 2.5rem;
            margin-bottom: 1rem;
            line-height: 1.3;
        }
        h2 { font-size: 2rem; border-left: 5px solid #FFD700; padding-left: 15px; }
        h3 { font-size: 1.6rem; }
        h4 { font-size: 1.3rem; color: #5c6bc0; }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
            font-size: 1.1rem;
        }
        .highlight {
            background: linear-gradient(120deg, #e1f5fe 0%, #f3e5f5 100%);
            padding: 25px;
            border-radius: 10px;
            border-left: 5px solid #3949ab;
            margin: 2rem 0;
            font-size: 1.15rem;
        }
        .emoji { font-size: 1.2em; margin-right: 5px; }
        strong { color: #1a237e; }
        .feature-img {
            width: 100%;
            max-height: 500px;
            object-fit: cover;
            border-radius: 10px;
            margin: 2rem auto;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
            transition: transform 0.5s ease;
        }
        .feature-img:hover { transform: scale(1.01); }
        .sidebar-card {
            background: white;
            border-radius: 15px;
            padding: 25px;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.06);
            margin-top: 20px;
        }
        .sidebar-card h3 {
            color: #d32f2f;
            text-align: center;
            margin-bottom: 20px;
            font-size: 1.5rem;
        }
        .quick-links ul, .featured-links ul {
            list-style: none;
            margin-bottom: 25px;
        }
        .quick-links li, .featured-links li {
            margin-bottom: 12px;
        }
        .quick-links a, .featured-links a {
            color: #3949ab;
            text-decoration: none;
            display: block;
            padding: 12px 15px;
            background: #f5f5f5;
            border-radius: 8px;
            transition: all 0.3s ease;
            border-left: 4px solid transparent;
        }
        .quick-links a:hover, .featured-links a:hover {
            background: #e8eaf6;
            border-left-color: #FFD700;
            transform: translateX(5px);
        }
        .interactive-module {
            background: #f8f9fa;
            border: 2px dashed #ccc;
            border-radius: 10px;
            padding: 25px;
            margin: 3rem 0;
            text-align: center;
        }
        .module-title {
            font-size: 1.5rem;
            color: #1a237e;
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
        }
        .search-box, .comment-form, .rating-form {
            display: flex;
            flex-direction: column;
            gap: 15px;
            max-width: 500px;
            margin: 0 auto;
        }
        input, textarea, select {
            padding: 15px;
            border: 2px solid #ddd;
            border-radius: 8px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: #3949ab;
        }
        button, .btn {
            background: linear-gradient(90deg, #3949ab, #5c6bc0);
            color: white;
            border: none;
            padding: 15px 25px;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
        }
        button:hover, .btn:hover {
            background: linear-gradient(90deg, #283593, #3949ab);
            transform: translateY(-3px);
            box-shadow: 0 7px 14px rgba(0, 0, 0, 0.1);
        }
        .stars {
            display: flex;
            justify-content: center;
            gap: 10px;
            font-size: 2rem;
            color: #ddd;
            margin: 15px 0;
        }
        .stars i { cursor: pointer; transition: color 0.2s; }
        .stars i:hover, .stars i.active { color: #FFD700; }
        .site-footer {
            background: linear-gradient(90deg, #1a237e, #283593);
            color: white;
            padding: 40px 0 20px;
            margin-top: 50px;
            border-top-left-radius: 30px;
            border-top-right-radius: 30px;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
            margin-bottom: 30px;
        }
        .footer-logo {
            font-size: 2rem;
            color: #FFD700;
            margin-bottom: 15px;
        }
        friend-link {
            display: block;
            margin: 10px 0;
        }
        friend-link a {
            color: #bbdefb;
            text-decoration: none;
            padding: 5px 0;
            display: block;
            transition: color 0.3s;
        }
        friend-link a:hover { color: #FFD700; text-decoration: underline; }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.9rem;
            color: #bbdefb;
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            .main-nav ul {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #283593;
                position: absolute;
                top: 100%;
                left: 0;
                padding: 20px;
                border-radius: 0 0 15px 15px;
                box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
            }
            .main-nav.active ul { display: flex; }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            .content-card, .sidebar-card { padding: 20px; }
            .article-meta { flex-direction: column; align-items: flex-start; }
        }