:root {
            --primary-color: #1e3a8a;
            --secondary-color: #dc2626;
            --accent-color: #f59e0b;
            --text-color: #1f2937;
            --light-bg: #f8fafc;
            --dark-bg: #0f172a;
            --gray-border: #e2e8f0;
            --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            line-height: 1.7;
            color: var(--text-color);
            background-color: #ffffff;
            overflow-x: hidden;
        }
        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background-color: var(--primary-color);
            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;
        }
        .logo a {
            font-size: 1.8rem;
            font-weight: 800;
            color: white;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo-icon {
            color: var(--accent-color);
        }
        .search-form {
            display: flex;
            max-width: 400px;
            width: 100%;
        }
        .search-input {
            flex: 1;
            padding: 10px 15px;
            border: none;
            border-radius: 4px 0 0 4px;
            font-size: 1rem;
        }
        .search-button {
            background-color: var(--secondary-color);
            color: white;
            border: none;
            padding: 0 20px;
            border-radius: 0 4px 4px 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-button:hover {
            background-color: #b91c1c;
        }
        .main-nav {
            background-color: var(--dark-bg);
            padding: 0;
        }
        .nav-list {
            display: flex;
            list-style: none;
            justify-content: center;
            flex-wrap: wrap;
        }
        .nav-list li {
            position: relative;
        }
        .nav-list a {
            color: white;
            text-decoration: none;
            padding: 15px 20px;
            display: block;
            font-weight: 500;
            transition: var(--transition);
            border-bottom: 3px solid transparent;
        }
        .nav-list a:hover,
        .nav-list a.active {
            background-color: rgba(255, 255, 255, 0.1);
            border-bottom-color: var(--accent-color);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
            padding: 5px;
        }
        .breadcrumb {
            padding: 15px 0;
            background-color: var(--light-bg);
            border-bottom: 1px solid var(--gray-border);
        }
        .breadcrumb-list {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 10px;
        }
        .breadcrumb-list li {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .breadcrumb-list a {
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 500;
        }
        .breadcrumb-list a:hover {
            text-decoration: underline;
        }
        .breadcrumb-list .separator {
            color: #94a3b8;
        }
        main {
            padding: 40px 0;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        .article-content {
            background-color: white;
            padding: 30px;
            border-radius: 8px;
            box-shadow: var(--shadow);
        }
        .article-header {
            margin-bottom: 30px;
            border-bottom: 2px solid var(--gray-border);
            padding-bottom: 20px;
        }
        .article-title {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 15px;
            line-height: 1.2;
        }
        .article-meta {
            display: flex;
            gap: 20px;
            color: #64748b;
            font-size: 0.9rem;
            margin-bottom: 15px;
        }
        .article-meta i {
            margin-right: 5px;
        }
        .featured-image {
            width: 100%;
            height: auto;
            border-radius: 8px;
            margin: 25px 0;
            box-shadow: var(--shadow);
        }
        .article-body h2 {
            color: var(--primary-color);
            margin: 35px 0 15px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--accent-color);
        }
        .article-body h3 {
            color: var(--dark-bg);
            margin: 25px 0 10px;
        }
        .article-body p {
            margin-bottom: 20px;
            font-size: 1.1rem;
        }
        .highlight-box {
            background-color: var(--light-bg);
            border-left: 4px solid var(--accent-color);
            padding: 20px;
            margin: 25px 0;
            border-radius: 0 8px 8px 0;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
            margin: 30px 0;
        }
        .stat-card {
            background: white;
            border: 1px solid var(--gray-border);
            border-radius: 8px;
            padding: 20px;
            text-align: center;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .stat-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
        }
        .stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--secondary-color);
            margin-bottom: 10px;
        }
        .internal-links {
            background-color: var(--light-bg);
            padding: 25px;
            border-radius: 8px;
            margin: 30px 0;
        }
        .internal-links h3 {
            color: var(--primary-color);
            margin-bottom: 15px;
        }
        .internal-links ul {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 10px;
        }
        .internal-links li {
            margin-bottom: 8px;
        }
        .internal-links a {
            color: var(--primary-color);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 8px;
            border-radius: 4px;
            transition: var(--transition);
        }
        .internal-links a:hover {
            background-color: white;
            padding-left: 15px;
        }
        .sidebar {
            background-color: white;
            padding: 25px;
            border-radius: 8px;
            box-shadow: var(--shadow);
            height: fit-content;
        }
        .sidebar-widget {
            margin-bottom: 30px;
            padding-bottom: 20px;
            border-bottom: 1px solid var(--gray-border);
        }
        .sidebar-widget:last-child {
            border-bottom: none;
        }
        .sidebar-title {
            color: var(--primary-color);
            font-size: 1.3rem;
            margin-bottom: 15px;
            padding-bottom: 8px;
            border-bottom: 2px solid var(--accent-color);
        }
        .rating-widget {
            text-align: center;
        }
        .stars {
            display: flex;
            justify-content: center;
            gap: 5px;
            margin: 15px 0;
        }
        .star {
            color: #d1d5db;
            font-size: 1.8rem;
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover,
        .star.active {
            color: var(--accent-color);
        }
        .rating-form {
            margin-top: 20px;
        }
        .rating-input {
            width: 100%;
            padding: 10px;
            margin: 10px 0;
            border: 1px solid var(--gray-border);
            border-radius: 4px;
        }
        .rating-button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 10px 20px;
            border-radius: 4px;
            cursor: pointer;
            width: 100%;
            transition: var(--transition);
        }
        .rating-button:hover {
            background-color: #1e40af;
        }
        .comments-section {
            margin-top: 50px;
            padding-top: 30px;
            border-top: 2px solid var(--gray-border);
        }
        .comment-form {
            background-color: var(--light-bg);
            padding: 25px;
            border-radius: 8px;
            margin-bottom: 30px;
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: var(--primary-color);
        }
        .form-input,
        .form-textarea {
            width: 100%;
            padding: 12px;
            border: 1px solid var(--gray-border);
            border-radius: 4px;
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-input:focus,
        .form-textarea:focus {
            outline: none;
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.1);
        }
        .form-textarea {
            min-height: 150px;
            resize: vertical;
        }
        .submit-button {
            background-color: var(--secondary-color);
            color: white;
            border: none;
            padding: 12px 30px;
            border-radius: 4px;
            font-size: 1rem;
            cursor: pointer;
            transition: var(--transition);
        }
        .submit-button:hover {
            background-color: #b91c1c;
            transform: translateY(-2px);
        }
        footer {
            background-color: var(--dark-bg);
            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: 1.8rem;
            font-weight: 800;
            margin-bottom: 15px;
            color: white;
        }
        .footer-description {
            color: #cbd5e1;
            line-height: 1.6;
        }
        .friend-links {
            list-style: none;
        }
        .friend-links li {
            margin-bottom: 10px;
        }
        .friend-links a {
            color: #cbd5e1;
            text-decoration: none;
            transition: var(--transition);
            display: block;
            padding: 5px 0;
        }
        .friend-links a:hover {
            color: var(--accent-color);
            padding-left: 5px;
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #334155;
            color: #94a3b8;
            font-size: 0.9rem;
        }
        @media (max-width: 1024px) {
            main {
                grid-template-columns: 1fr;
                gap: 30px;
            }
        }
        @media (max-width: 768px) {
            .header-top {
                flex-direction: column;
                gap: 15px;
            }
            .search-form {
                max-width: 100%;
            }
            .hamburger {
                display: block;
                position: absolute;
                top: 15px;
                right: 20px;
            }
            .main-nav {
                display: none;
            }
            .main-nav.active {
                display: block;
            }
            .nav-list {
                flex-direction: column;
                text-align: center;
            }
            .nav-list a {
                padding: 12px 20px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            }
            .article-title {
                font-size: 2rem;
            }
            .article-meta {
                flex-direction: column;
                gap: 10px;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
        }
        @media print {
            header, .sidebar, .comments-section, footer, .breadcrumb {
                display: none;
            }
            main {
                padding: 0;
                grid-template-columns: 1fr;
            }
            .article-content {
                box-shadow: none;
                padding: 0;
            }
        }