:root {
            --primary-color: #0055A4; 
            --secondary-color: #FFD700; 
            --accent-color: #FF6B6B;
            --dark-color: #1a1a2e;
            --light-color: #f8f9fa;
            --text-color: #333;
            --gray-color: #6c757d;
            --border-radius: 8px;
            --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
            --max-width: 1200px;
        }
        * {
            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: var(--text-color);
            background-color: var(--light-color);
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        ul {
            list-style: none;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, var(--dark-color) 0%, #16213e 100%);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo a {
            font-size: 1.8rem;
            font-weight: 800;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo i {
            color: var(--secondary-color);
        }
        .logo span {
            background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .main-nav ul {
            display: flex;
            gap: 2rem;
        }
        .main-nav a {
            font-weight: 600;
            font-size: 1rem;
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a:hover {
            color: var(--secondary-color);
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--secondary-color);
            transition: width 0.3s ease;
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            flex-direction: column;
            cursor: pointer;
            gap: 4px;
        }
        .hamburger span {
            width: 25px;
            height: 3px;
            background-color: white;
            border-radius: 2px;
            transition: var(--transition);
        }
        .breadcrumb {
            background-color: #e9ecef;
            padding: 1rem 0;
            margin-bottom: 2rem;
        }
        .breadcrumb ul {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .breadcrumb li {
            display: flex;
            align-items: center;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '/';
            margin-left: 0.5rem;
            color: var(--gray-color);
        }
        .breadcrumb a:hover {
            color: var(--primary-color);
            text-decoration: underline;
        }
        main {
            padding: 2rem 0 4rem;
        }
        .article-header {
            text-align: center;
            margin-bottom: 3rem;
            padding-bottom: 2rem;
            border-bottom: 2px solid #eaeaea;
        }
        .article-header h1 {
            font-size: 2.8rem;
            line-height: 1.2;
            margin-bottom: 1rem;
            color: var(--dark-color);
        }
        .article-meta {
            display: flex;
            justify-content: center;
            gap: 2rem;
            color: var(--gray-color);
            font-size: 0.95rem;
            flex-wrap: wrap;
        }
        .article-meta span {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .featured-image {
            margin: 2rem auto;
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--box-shadow);
            max-width: 900px;
        }
        .featured-image figcaption {
            text-align: center;
            padding: 0.8rem;
            font-style: italic;
            color: var(--gray-color);
            background-color: #f8f9fa;
            border-top: 1px solid #dee2e6;
        }
        .article-content {
            max-width: 800px;
            margin: 0 auto;
            font-size: 1.1rem;
        }
        .article-content section {
            margin-bottom: 3rem;
        }
        .article-content h2 {
            font-size: 2rem;
            color: var(--primary-color);
            margin: 2.5rem 0 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--secondary-color);
        }
        .article-content h3 {
            font-size: 1.6rem;
            color: var(--dark-color);
            margin: 2rem 0 1rem;
        }
        .article-content p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .highlight-box {
            background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
            border-left: 4px solid var(--primary-color);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            box-shadow: var(--box-shadow);
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin: 2rem 0;
        }
        .stat-card {
            background: white;
            padding: 1.5rem;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            text-align: center;
            border-top: 4px solid var(--primary-color);
        }
        .stat-card i {
            font-size: 2rem;
            color: var(--primary-color);
            margin-bottom: 1rem;
        }
        .interactive-section {
            background: white;
            border-radius: var(--border-radius);
            padding: 2rem;
            margin: 3rem 0;
            box-shadow: var(--box-shadow);
        }
        .interactive-section h2 {
            color: var(--dark-color);
            text-align: center;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        .form-control {
            width: 100%;
            padding: 0.8rem 1rem;
            border: 1px solid #ced4da;
            border-radius: var(--border-radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-control:focus {
            outline: none;
            border-color: var(--primary-color);
            box-shadow: 0 0 0 0.2rem rgba(0, 85, 164, 0.25);
        }
        textarea.form-control {
            min-height: 150px;
            resize: vertical;
        }
        .btn {
            display: inline-block;
            padding: 0.8rem 2rem;
            background: linear-gradient(135deg, var(--primary-color) 0%, #004085 100%);
            color: white;
            border: none;
            border-radius: var(--border-radius);
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }
        .btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 15px rgba(0, 85, 164, 0.3);
        }
        .btn-secondary {
            background: linear-gradient(135deg, var(--secondary-color) 0%, #e6b400 100%);
            color: var(--dark-color);
        }
        .rating-stars {
            display: flex;
            gap: 0.5rem;
            justify-content: center;
            margin: 1rem 0;
        }
        .rating-stars input {
            display: none;
        }
        .rating-stars label {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .rating-stars label:hover,
        .rating-stars input:checked ~ label,
        .rating-stars label:hover ~ label {
            color: var(--secondary-color);
        }
        .footer-links {
            background-color: #2d3748;
            padding: 3rem 0;
            color: white;
        }
        .web-link {
            display: inline-block;
            margin: 0.5rem 1rem 0.5rem 0;
            padding: 0.5rem 1rem;
            background-color: rgba(255, 255, 255, 0.1);
            border-radius: 30px;
            transition: var(--transition);
        }
        .web-link:hover {
            background-color: var(--primary-color);
            transform: translateY(-2px);
        }
        .site-footer {
            background-color: var(--dark-color);
            color: white;
            padding: 3rem 0 2rem;
            text-align: center;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-logo {
            font-size: 1.8rem;
            font-weight: 800;
            margin-bottom: 1rem;
        }
        .copyright {
            padding-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            .article-header h1 {
                font-size: 2.4rem;
            }
            .main-nav {
                position: fixed;
                top: 70px;
                left: -100%;
                width: 100%;
                height: calc(100vh - 70px);
                background-color: var(--dark-color);
                flex-direction: column;
                align-items: center;
                justify-content: flex-start;
                padding-top: 2rem;
                transition: left 0.4s ease;
                z-index: 999;
            }
            .main-nav.active {
                left: 0;
            }
            .main-nav ul {
                flex-direction: column;
                align-items: center;
                gap: 1.5rem;
            }
            .hamburger {
                display: flex;
            }
            .hamburger.active span:nth-child(1) {
                transform: rotate(45deg) translate(6px, 6px);
            }
            .hamburger.active span:nth-child(2) {
                opacity: 0;
            }
            .hamburger.active span:nth-child(3) {
                transform: rotate(-45deg) translate(6px, -6px);
            }
        }
        @media (max-width: 768px) {
            .article-header h1 {
                font-size: 2rem;
            }
            .article-content h2 {
                font-size: 1.7rem;
            }
            .article-content h3 {
                font-size: 1.4rem;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .article-meta {
                flex-direction: column;
                gap: 0.5rem;
                align-items: center;
            }
        }
        .text-center { text-align: center; }
        .text-primary { color: var(--primary-color); }
        .text-secondary { color: var(--secondary-color); }
        .mb-1 { margin-bottom: 1rem; }
        .mb-2 { margin-bottom: 2rem; }
        .mb-3 { margin-bottom: 3rem; }
        .mt-1 { margin-top: 1rem; }
        .mt-2 { margin-top: 2rem; }
        .mt-3 { margin-top: 3rem; }
        .bold { font-weight: 700; }
        .emoji { font-size: 1.2em; }