* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary: #2A5C8A;
            --secondary: #FF9900;
            --accent: #34A853;
            --dark: #1A2332;
            --light: #F8F9FA;
            --gray: #6C757D;
            --text: #333333;
            --shadow: 0 4px 12px rgba(0,0,0,0.08);
            --transition: all 0.3s ease;
            --border-radius: 12px;
            --container-width: 1200px;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--text);
            background-color: var(--light);
            font-size: 18px;
            overflow-x: hidden;
        }
        h1, h2, h3, h4 {
            color: var(--dark);
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 1rem;
        }
        h1 {
            font-size: 3.2rem;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 1.5rem;
        }
        h2 {
            font-size: 2.5rem;
            color: var(--primary);
            border-left: 5px solid var(--secondary);
            padding-left: 1rem;
            margin-top: 3rem;
        }
        h3 {
            font-size: 1.8rem;
            color: var(--dark);
            margin-top: 2rem;
        }
        h4 {
            font-size: 1.4rem;
            color: var(--gray);
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .container {
            width: 100%;
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background-color: white;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1.2rem 0;
        }
        .my-logo {
            font-size: 2.8rem;
            font-weight: 900;
            text-decoration: none;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo span {
            color: var(--secondary);
        }
        .my-logo:hover {
            transform: scale(1.05);
            transition: var(--transition);
        }
        .desktop-nav {
            display: flex;
            gap: 2rem;
        }
        .desktop-nav a {
            text-decoration: none;
            color: var(--dark);
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: var(--border-radius);
            transition: var(--transition);
        }
        .desktop-nav a:hover {
            background-color: var(--primary);
            color: white;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: var(--primary);
        }
        .mobile-nav {
            display: none;
            flex-direction: column;
            background-color: white;
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            box-shadow: var(--shadow);
            padding: 1rem;
        }
        .mobile-nav.active {
            display: flex;
        }
        .mobile-nav a {
            padding: 1rem;
            text-decoration: none;
            color: var(--dark);
            border-bottom: 1px solid #eee;
        }
        .mobile-nav a:hover {
            background-color: var(--light);
        }
        .breadcrumb {
            background-color: #f1f5f9;
            padding: 1rem 0;
            font-size: 0.95rem;
        }
        .breadcrumb a {
            color: var(--primary);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb span {
            color: var(--gray);
            margin: 0 8px;
        }
        .hero {
            background: linear-gradient(135deg, var(--primary) 0%, #1A2332 100%);
            color: white;
            padding: 4rem 0;
            text-align: center;
            margin-bottom: 3rem;
        }
        .hero h1 {
            color: white;
            -webkit-text-fill-color: white;
            background: none;
            font-size: 3.5rem;
        }
        .hero p {
            font-size: 1.3rem;
            max-width: 800px;
            margin: 0 auto 2rem;
            color: rgba(255,255,255,0.9);
        }
        .search-container {
            max-width: 600px;
            margin: 2rem auto;
            background-color: white;
            padding: 2rem;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .search-form {
            display: flex;
            gap: 10px;
        }
        .search-input {
            flex-grow: 1;
            padding: 1rem;
            border: 2px solid #e2e8f0;
            border-radius: var(--border-radius);
            font-size: 1.1rem;
        }
        .search-input:focus {
            outline: none;
            border-color: var(--primary);
        }
        .search-btn {
            background-color: var(--primary);
            color: white;
            border: none;
            padding: 0 2rem;
            border-radius: var(--border-radius);
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
        }
        .search-btn:hover {
            background-color: #1e4a75;
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            margin: 3rem 0;
        }
        .article-content {
            background-color: white;
            padding: 3rem;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .sidebar {
            background-color: white;
            padding: 2rem;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            height: fit-content;
            position: sticky;
            top: 120px;
        }
        .sidebar h3 {
            margin-top: 0;
            color: var(--primary);
            padding-bottom: 1rem;
            border-bottom: 2px solid var(--secondary);
        }
        .sidebar-links {
            list-style: none;
        }
        .sidebar-links li {
            margin-bottom: 1rem;
        }
        .sidebar-links a {
            color: var(--dark);
            text-decoration: none;
            display: block;
            padding: 0.8rem;
            border-radius: 8px;
            transition: var(--transition);
        }
        .sidebar-links a:hover {
            background-color: var(--light);
            color: var(--primary);
            padding-left: 1.2rem;
        }
        .sidebar-links i {
            margin-right: 10px;
            color: var(--secondary);
        }
        .featured-image {
            width: 100%;
            max-height: 500px;
            object-fit: cover;
            border-radius: var(--border-radius);
            margin: 2rem 0;
            box-shadow: var(--shadow);
        }
        .highlight {
            background-color: #fff9e6;
            border-left: 4px solid var(--secondary);
            padding: 2rem;
            margin: 2rem 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .stats-box {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin: 2rem 0;
        }
        .stat-card {
            background-color: #f8fafc;
            padding: 1.5rem;
            border-radius: var(--border-radius);
            border-top: 5px solid var(--accent);
            text-align: center;
        }
        .stat-number {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--primary);
            display: block;
        }
        .stat-label {
            color: var(--gray);
            font-size: 1rem;
        }
        .content-link {
            color: var(--primary);
            text-decoration: none;
            font-weight: 600;
            border-bottom: 2px dotted var(--primary);
        }
        .content-link:hover {
            color: var(--secondary);
            border-bottom-style: solid;
        }
        .interactive-section {
            background-color: #f1f8ff;
            padding: 2.5rem;
            border-radius: var(--border-radius);
            margin: 3rem 0;
        }
        .rating-container {
            display: flex;
            align-items: center;
            gap: 1rem;
            margin: 1.5rem 0;
        }
        .star-rating {
            display: flex;
            gap: 5px;
        }
        .star {
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover,
        .star.active {
            color: var(--secondary);
        }
        .comment-form, .rating-form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
            margin-top: 2rem;
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        .form-input, .form-textarea {
            padding: 1rem;
            border: 2px solid #e2e8f0;
            border-radius: var(--border-radius);
            font-size: 1rem;
            font-family: inherit;
        }
        .form-input:focus, .form-textarea:focus {
            outline: none;
            border-color: var(--primary);
        }
        .form-textarea {
            min-height: 150px;
            resize: vertical;
        }
        .submit-btn {
            background-color: var(--primary);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: var(--border-radius);
            cursor: pointer;
            font-weight: 600;
            font-size: 1.1rem;
            transition: var(--transition);
            align-self: flex-start;
        }
        .submit-btn:hover {
            background-color: #1e4a75;
            transform: translateY(-3px);
        }
        footer {
            background-color: var(--dark);
            color: white;
            padding: 4rem 0 2rem;
            margin-top: 4rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 3rem;
            margin-bottom: 3rem;
        }
        .footer-section h3 {
            color: white;
            margin-bottom: 1.5rem;
            font-size: 1.5rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a {
            color: #cbd5e1;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        friend-link {
            display: block;
            margin: 1rem 0;
            padding: 1rem;
            background-color: rgba(255,255,255,0.1);
            border-radius: 8px;
        }
        friend-link a {
            color: var(--secondary);
            text-decoration: none;
            font-weight: 600;
        }
        friend-link a:hover {
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid #334155;
            color: #94a3b8;
            font-size: 0.9rem;
        }
        .update-time {
            background-color: #e6f7ff;
            padding: 1rem;
            border-radius: var(--border-radius);
            margin: 2rem 0;
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--primary);
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
            }
            h1 {
                font-size: 2.8rem;
            }
            h2 {
                font-size: 2.2rem;
            }
        }
        @media (max-width: 768px) {
            .desktop-nav {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .header-container {
                padding: 1rem 0;
            }
            .hero {
                padding: 3rem 0;
            }
            .hero h1 {
                font-size: 2.5rem;
            }
            .article-content {
                padding: 2rem;
            }
            .search-form {
                flex-direction: column;
            }
            .search-btn {
                padding: 1rem;
            }
            .stats-box {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 480px) {
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            .container {
                padding: 0 15px;
            }
            .article-content {
                padding: 1.5rem;
            }
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .fade-in {
            animation: fadeIn 0.8s ease forwards;
        }
        @media print {
            .sidebar, .hamburger, .search-container, 
            .interactive-section, footer {
                display: none;
            }
            .article-content {
                box-shadow: none;
                padding: 0;
            }
        }