:root {
            --primary-color: #ff6b35;
            --secondary-color: #1a237e;
            --accent-color: #ffd166;
            --dark-color: #121212;
            --light-color: #f5f5f5;
            --text-color: #333;
            --text-light: #666;
            --border-color: #ddd;
            --shadow: 0 4px 12px rgba(0,0,0,0.1);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            background-color: #f9f9f9;
            overflow-x: hidden;
        }
        .header {
            background: linear-gradient(135deg, var(--secondary-color), #283593);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo {
            font-size: 1.8rem;
            font-weight: 800;
            text-decoration: none;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo span {
            color: var(--accent-color);
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        .logo i {
            color: var(--primary-color);
        }
        .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: 1.1rem;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            transition: var(--transition);
        }
        .nav-link:hover {
            background-color: rgba(255, 255, 255, 0.1);
            transform: translateY(-2px);
        }
        .nav-link.active {
            background-color: var(--primary-color);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
        }
        .nav-mobile {
            position: fixed;
            top: 70px;
            right: -100%;
            width: 80%;
            height: calc(100vh - 70px);
            background-color: var(--secondary-color);
            flex-direction: column;
            padding: 2rem;
            transition: var(--transition);
            z-index: 999;
        }
        .nav-mobile.active {
            right: 0;
        }
        .nav-mobile .nav-link {
            margin-bottom: 1rem;
            font-size: 1.2rem;
            padding: 1rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .breadcrumb {
            background-color: var(--light-color);
            padding: 1rem 0;
            border-bottom: 1px solid var(--border-color);
        }
        .breadcrumb-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .breadcrumb-list {
            display: flex;
            list-style: none;
            gap: 0.5rem;
            flex-wrap: wrap;
        }
        .breadcrumb-item {
            font-size: 0.9rem;
        }
        .breadcrumb-item:not(:last-child)::after {
            content: "›";
            margin-left: 0.5rem;
            color: var(--text-light);
        }
        .breadcrumb-link {
            color: var(--primary-color);
            text-decoration: none;
        }
        .breadcrumb-link:hover {
            text-decoration: underline;
        }
        .main-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 2rem 20px;
            display: grid;
            grid-template-columns: 1fr;
            gap: 2rem;
        }
        @media (min-width: 992px) {
            .main-container {
                grid-template-columns: 3fr 1fr;
            }
        }
        .article {
            background-color: white;
            border-radius: 8px;
            padding: 2rem;
            box-shadow: var(--shadow);
        }
        .article-header {
            margin-bottom: 2rem;
            border-bottom: 2px solid var(--primary-color);
            padding-bottom: 1rem;
        }
        .article-title {
            font-size: 2.5rem;
            color: var(--secondary-color);
            line-height: 1.2;
            margin-bottom: 1rem;
        }
        @media (max-width: 768px) {
            .article-title {
                font-size: 2rem;
            }
        }
        .article-meta {
            display: flex;
            gap: 1rem;
            color: var(--text-light);
            font-size: 0.9rem;
        }
        .article-meta-item {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .content-section {
            margin-bottom: 3rem;
        }
        .section-title {
            font-size: 1.8rem;
            color: var(--secondary-color);
            margin-bottom: 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 1px solid var(--border-color);
        }
        .section-subtitle {
            font-size: 1.4rem;
            color: var(--primary-color);
            margin: 1.5rem 0 1rem 0;
        }
        .paragraph {
            margin-bottom: 1.5rem;
            line-height: 1.7;
            text-align: justify;
        }
        .highlight {
            background-color: rgba(255, 107, 53, 0.1);
            border-left: 4px solid var(--primary-color);
            padding: 1.5rem;
            margin: 1.5rem 0;
            border-radius: 0 4px 4px 0;
        }
        .highlight-title {
            font-weight: 700;
            color: var(--primary-color);
            margin-bottom: 0.5rem;
        }
        .tier-list-container {
            margin: 2rem 0;
            overflow-x: auto;
        }
        .tier-table {
            width: 100%;
            border-collapse: collapse;
            min-width: 600px;
        }
        .tier-table th {
            background-color: var(--secondary-color);
            color: white;
            padding: 1rem;
            text-align: left;
        }
        .tier-table td {
            padding: 1rem;
            border-bottom: 1px solid var(--border-color);
        }
        .tier-table tr:hover {
            background-color: rgba(26, 35, 126, 0.05);
        }
        .tier-badge {
            display: inline-block;
            padding: 0.3rem 0.8rem;
            border-radius: 20px;
            font-weight: 700;
            font-size: 0.8rem;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        .tier-s {
            background-color: #ff4757;
            color: white;
        }
        .tier-a {
            background-color: #ff6b35;
            color: white;
        }
        .tier-b {
            background-color: #ffa502;
            color: white;
        }
        .tier-c {
            background-color: #2ed573;
            color: white;
        }
        .tier-d {
            background-color: #1e90ff;
            color: white;
        }
        .tier-f {
            background-color: #747d8c;
            color: white;
        }
        .image-container {
            margin: 2rem 0;
            text-align: center;
        }
        .content-image {
            max-width: 100%;
            height: auto;
            border-radius: 8px;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .content-image:hover {
            transform: scale(1.01);
        }
        .image-caption {
            font-style: italic;
            color: var(--text-light);
            margin-top: 0.5rem;
            font-size: 0.9rem;
        }
        .interactive-section {
            background-color: #f8f9fa;
            border-radius: 8px;
            padding: 2rem;
            margin: 2rem 0;
            border: 1px solid var(--border-color);
        }
        .interactive-title {
            font-size: 1.5rem;
            margin-bottom: 1.5rem;
            color: var(--secondary-color);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .search-form {
            display: flex;
            margin-bottom: 2rem;
        }
        .search-input {
            flex: 1;
            padding: 0.8rem 1rem;
            border: 1px solid var(--border-color);
            border-radius: 4px 0 0 4px;
            font-size: 1rem;
        }
        .search-button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: 0 4px 4px 0;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
        }
        .search-button:hover {
            background-color: #e55a2b;
        }
        .rating-container {
            display: flex;
            align-items: center;
            gap: 1rem;
            margin-bottom: 2rem;
            flex-wrap: wrap;
        }
        .rating-stars {
            display: flex;
            gap: 0.2rem;
        }
        .rating-star {
            font-size: 1.5rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .rating-star.active,
        .rating-star:hover {
            color: #ffc107;
        }
        .comment-form {
            margin-top: 2rem;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        .form-input,
        .form-textarea {
            width: 100%;
            padding: 0.8rem;
            border: 1px solid var(--border-color);
            border-radius: 4px;
            font-family: inherit;
            font-size: 1rem;
        }
        .form-textarea {
            min-height: 150px;
            resize: vertical;
        }
        .submit-button {
            background-color: var(--secondary-color);
            color: white;
            border: none;
            padding: 0.8rem 2rem;
            border-radius: 4px;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
        }
        .submit-button:hover {
            background-color: #0d1a6b;
            transform: translateY(-2px);
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .sidebar-widget {
            background-color: white;
            border-radius: 8px;
            padding: 1.5rem;
            box-shadow: var(--shadow);
        }
        .widget-title {
            font-size: 1.3rem;
            color: var(--secondary-color);
            margin-bottom: 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--primary-color);
        }
        .widget-list {
            list-style: none;
        }
        .widget-item {
            margin-bottom: 1rem;
            padding-bottom: 1rem;
            border-bottom: 1px solid var(--border-color);
        }
        .widget-item:last-child {
            margin-bottom: 0;
            padding-bottom: 0;
            border-bottom: none;
        }
        .widget-link {
            color: var(--text-color);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            transition: var(--transition);
        }
        .widget-link:hover {
            color: var(--primary-color);
            transform: translateX(5px);
        }
        .web-links-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 2rem 20px;
        }
        .web-links-title {
            font-size: 1.5rem;
            color: var(--secondary-color);
            margin-bottom: 1.5rem;
            text-align: center;
        }
        .web-links-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1rem;
        }
        .web-link {
            background-color: white;
            padding: 1rem;
            border-radius: 4px;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .web-link:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 16px rgba(0,0,0,0.1);
        }
        .web-link a {
            color: var(--secondary-color);
            text-decoration: none;
            font-weight: 600;
            display: block;
            text-align: center;
        }
        .web-link a:hover {
            color: var(--primary-color);
        }
        .footer {
            background-color: var(--dark-color);
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }
        .footer-section-title {
            font-size: 1.3rem;
            margin-bottom: 1.5rem;
            color: var(--accent-color);
        }
        .footer-links {
            list-style: none;
        }
        .footer-link {
            margin-bottom: 0.8rem;
        }
        .footer-link a {
            color: #bbb;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-link a:hover {
            color: white;
            padding-left: 5px;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #aaa;
            font-size: 0.9rem;
        }
        .text-bold {
            font-weight: 700;
        }
        .text-primary {
            color: var(--primary-color);
        }
        .text-secondary {
            color: var(--secondary-color);
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 0.3rem;
        }
        @media (max-width: 768px) {
            .article {
                padding: 1.5rem;
            }
            .interactive-section {
                padding: 1.5rem;
            }
            .web-links-grid {
                grid-template-columns: 1fr;
            }
        }