:root {
            --primary: #1e3a8a;
            --secondary: #dc2626;
            --accent: #059669;
            --light: #f8fafc;
            --dark: #0f172a;
            --gray: #64748b;
            --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--dark);
            background-color: #ffffff;
            max-width: 100vw;
            overflow-x: hidden;
        }
        .header {
            background: linear-gradient(135deg, var(--primary) 0%, #1e40af 100%);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            text-decoration: none;
        }
        .logo-icon {
            font-size: 2.2rem;
            color: #fbbf24;
        }
        .logo-text {
            font-size: 1.8rem;
            font-weight: 800;
            color: white;
            letter-spacing: -0.5px;
        }
        .logo-text span {
            color: #fbbf24;
        }
        .nav-desktop {
            display: flex;
            gap: 2rem;
        }
        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }
        }
        .nav-link {
            color: white;
            text-decoration: none;
            font-weight: 600;
            font-size: 1rem;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .nav-link:hover {
            background-color: rgba(255, 255, 255, 0.15);
            transform: translateY(-2px);
        }
        .nav-link.active {
            background-color: var(--secondary);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
        }
        .mobile-nav {
            display: none;
            width: 100%;
            background-color: var(--dark);
            padding: 1rem;
            flex-direction: column;
            gap: 1rem;
            animation: slideDown 0.3s ease;
        }
        @keyframes slideDown {
            from { opacity: 0; transform: translateY(-10px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .mobile-nav.active {
            display: flex;
        }
        .breadcrumb {
            background-color: var(--light);
            padding: 1rem 0;
            border-bottom: 1px solid #e2e8f0;
        }
        .breadcrumb-list {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 0.5rem;
            align-items: center;
        }
        .breadcrumb-item {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.9rem;
        }
        .breadcrumb-item a {
            color: var(--primary);
            text-decoration: none;
        }
        .breadcrumb-item a:hover {
            text-decoration: underline;
        }
        .breadcrumb-item:not(:last-child)::after {
            content: "›";
            color: var(--gray);
        }
        .main-content {
            padding: 2.5rem 0;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        .article-container {
            background: white;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .article-header {
            padding: 2.5rem 2rem;
            background: linear-gradient(rgba(30, 58, 138, 0.9), rgba(30, 58, 138, 0.8)), url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" preserveAspectRatio="none"><path d="M0,0 L100,0 L100,100 Z" fill="white"/>');
            background-size: cover;
            color: white;
            position: relative;
        }
        .article-title {
            font-size: 2.5rem;
            margin-bottom: 1rem;
            line-height: 1.2;
        }
        @media (max-width: 768px) {
            .article-title {
                font-size: 2rem;
            }
        }
        .article-meta {
            display: flex;
            gap: 1.5rem;
            color: rgba(255, 255, 255, 0.85);
            font-size: 0.9rem;
            margin-bottom: 1.5rem;
        }
        .meta-item {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .article-content {
            padding: 2.5rem;
        }
        .content-section {
            margin-bottom: 3rem;
        }
        .section-title {
            font-size: 1.8rem;
            color: var(--primary);
            margin-bottom: 1.5rem;
            padding-bottom: 0.75rem;
            border-bottom: 3px solid var(--secondary);
            position: relative;
        }
        .section-title::after {
            content: "";
            position: absolute;
            bottom: -3px;
            left: 0;
            width: 100px;
            height: 3px;
            background-color: var(--accent);
        }
        .subsection-title {
            font-size: 1.4rem;
            color: var(--dark);
            margin: 2rem 0 1rem;
            padding-left: 1rem;
            border-left: 4px solid var(--accent);
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.05rem;
        }
        .highlight {
            background-color: #fef3c7;
            padding: 1.5rem;
            border-radius: 8px;
            border-left: 5px solid #f59e0b;
            margin: 2rem 0;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin: 2rem 0;
        }
        .stat-card {
            background: var(--light);
            padding: 1.5rem;
            border-radius: 8px;
            text-align: center;
            box-shadow: 0 2px 4px rgba(0,0,0,0.05);
            transition: var(--transition);
        }
        .stat-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 6px 12px rgba(0,0,0,0.1);
        }
        .stat-value {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 0.5rem;
        }
        .stat-label {
            color: var(--gray);
            font-size: 0.95rem;
        }
        .featured-image {
            width: 100%;
            height: auto;
            border-radius: 10px;
            margin: 2rem 0;
            box-shadow: var(--shadow);
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: var(--gray);
            margin-top: 0.5rem;
            font-size: 0.9rem;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .sidebar-widget {
            background: white;
            border-radius: 10px;
            padding: 1.8rem;
            box-shadow: var(--shadow);
        }
        .widget-title {
            font-size: 1.3rem;
            color: var(--primary);
            margin-bottom: 1.5rem;
            padding-bottom: 0.75rem;
            border-bottom: 2px solid #e2e8f0;
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .search-form {
            display: flex;
            margin-bottom: 1.5rem;
        }
        .search-input {
            flex: 1;
            padding: 0.9rem 1rem;
            border: 2px solid #e2e8f0;
            border-right: none;
            border-radius: 6px 0 0 6px;
            font-size: 1rem;
            transition: var(--transition);
        }
        .search-input:focus {
            outline: none;
            border-color: var(--primary);
        }
        .search-button {
            background-color: var(--primary);
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 6px 6px 0;
            cursor: pointer;
            transition: var(--transition);
            font-size: 1.1rem;
        }
        .search-button:hover {
            background-color: #1e40af;
        }
        .related-links {
            list-style: none;
        }
        .related-link {
            margin-bottom: 0.9rem;
            padding-bottom: 0.9rem;
            border-bottom: 1px solid #e2e8f0;
        }
        .related-link:last-child {
            margin-bottom: 0;
            border-bottom: none;
        }
        .related-link a {
            color: var(--dark);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.75rem;
            transition: var(--transition);
        }
        .related-link a:hover {
            color: var(--primary);
            transform: translateX(5px);
        }
        .link-icon {
            color: var(--accent);
            font-size: 0.9rem;
        }
        .interactive-section {
            background: linear-gradient(to right, #f8fafc, #f1f5f9);
            border-radius: 10px;
            padding: 2rem;
            margin: 3rem 0;
            border: 1px solid #e2e8f0;
        }
        .rating-container {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
            margin-top: 1.5rem;
        }
        .star-rating {
            display: flex;
            gap: 0.5rem;
            font-size: 1.8rem;
            color: #e2e8f0;
            cursor: pointer;
        }
        .star-rating .star {
            transition: var(--transition);
        }
        .star-rating .star:hover,
        .star-rating .star.active {
            color: #fbbf24;
        }
        .comment-form, .rating-form {
            display: flex;
            flex-direction: column;
            gap: 1.2rem;
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        .form-label {
            font-weight: 600;
            color: var(--dark);
        }
        .form-input, .form-textarea {
            padding: 0.9rem 1rem;
            border: 2px solid #e2e8f0;
            border-radius: 6px;
            font-size: 1rem;
            font-family: inherit;
            transition: var(--transition);
        }
        .form-input:focus, .form-textarea:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.1);
        }
        .form-textarea {
            min-height: 120px;
            resize: vertical;
        }
        .submit-button {
            background-color: var(--primary);
            color: white;
            border: none;
            padding: 1rem 1.5rem;
            border-radius: 6px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: var(--transition);
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 0.75rem;
        }
        .submit-button:hover {
            background-color: #1e40af;
            transform: translateY(-2px);
            box-shadow: 0 4px 8px rgba(30, 58, 138, 0.2);
        }
        .footer {
            background-color: var(--dark);
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }
        .footer-section h3 {
            font-size: 1.3rem;
            margin-bottom: 1.5rem;
            color: #f8fafc;
            position: relative;
            padding-bottom: 0.75rem;
        }
        .footer-section h3::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 50px;
            height: 3px;
            background-color: var(--secondary);
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a {
            color: #cbd5e1;
            text-decoration: none;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .footer-links a:hover {
            color: white;
            transform: translateX(5px);
        }
        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin-top: 1.5rem;
        }
        friend-link {
            display: inline-block;
            background: rgba(255, 255, 255, 0.1);
            padding: 0.5rem 1rem;
            border-radius: 4px;
            transition: var(--transition);
        }
        friend-link a {
            color: #cbd5e1;
            text-decoration: none;
            font-size: 0.9rem;
        }
        friend-link:hover {
            background: rgba(255, 255, 255, 0.15);
            transform: translateY(-2px);
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #334155;
            color: #94a3b8;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 1rem;
            }
            .article-header, .article-content {
                padding: 1.8rem 1.5rem;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .sidebar-widget {
                padding: 1.5rem;
            }
            .footer-container {
                grid-template-columns: 1fr;
            }
        }
        @keyframes pulse {
            0% { transform: scale(1); }
            50% { transform: scale(1.05); }
            100% { transform: scale(1); }
        }
        .pulse {
            animation: pulse 2s infinite;
        }
        .schedule-table {
            width: 100%;
            border-collapse: collapse;
            margin: 2rem 0;
            box-shadow: 0 2px 8px rgba(0,0,0,0.05);
            border-radius: 8px;
            overflow: hidden;
        }
        .schedule-table th {
            background-color: var(--primary);
            color: white;
            padding: 1.2rem;
            text-align: left;
            font-weight: 600;
        }
        .schedule-table td {
            padding: 1rem 1.2rem;
            border-bottom: 1px solid #e2e8f0;
        }
        .schedule-table tr:last-child td {
            border-bottom: none;
        }
        .schedule-table tr:hover {
            background-color: #f8fafc;
        }
        .group-badge {
            display: inline-block;
            padding: 0.3rem 0.8rem;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-right: 0.5rem;
        }
        .group-a { background-color: #3b82f6; color: white; }
        .group-b { background-color: #10b981; color: white; }
        .group-c { background-color: #8b5cf6; color: white; }
        .group-d { background-color: #f59e0b; color: white; }
        .group-e { background-color: #ef4444; color: white; }
        .group-f { background-color: #ec4899; color: white; }
        .group-g { background-color: #06b6d4; color: white; }
        .group-h { background-color: #84cc16; color: white; }