:root {
            --primary: #1a6dfc;
            --secondary: #fc3c1a;
            --dark: #0a1428;
            --light: #f8f9fa;
            --gray: #6c757d;
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
            line-height: 1.8;
            color: #333;
            background-color: #fff;
            overflow-x: hidden;
        }
        .site-header {
            background: linear-gradient(135deg, var(--dark) 0%, #152642 100%);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo a {
            color: white;
            font-size: 2rem;
            font-weight: 800;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
            letter-spacing: -0.5px;
        }
        .logo a i {
            color: var(--primary);
        }
        .logo a span {
            background: linear-gradient(to right, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        .desktop-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .desktop-nav a {
            color: #ddd;
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
            transition: var(--transition);
        }
        .desktop-nav a:hover,
        .desktop-nav a.active {
            color: white;
        }
        .desktop-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: var(--primary);
            transition: var(--transition);
        }
        .desktop-nav a:hover::after {
            width: 100%;
        }
        .mobile-nav-toggle {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .mobile-nav {
            display: none;
            flex-direction: column;
            background: var(--dark);
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            padding: 1rem;
            box-shadow: 0 10px 20px rgba(0,0,0,0.2);
        }
        .mobile-nav.active {
            display: flex;
        }
        .mobile-nav a {
            color: #ddd;
            text-decoration: none;
            padding: 1rem;
            border-bottom: 1px solid rgba(255,255,255,0.1);
            transition: var(--transition);
        }
        .mobile-nav a:hover {
            color: white;
            background: rgba(255,255,255,0.05);
            padding-left: 1.5rem;
        }
        .breadcrumb {
            background: #f1f5f9;
            padding: 0.8rem 0;
            font-size: 0.9rem;
            margin-bottom: 2rem;
        }
        .breadcrumb a {
            color: var(--primary);
            text-decoration: none;
        }
        .breadcrumb span {
            color: var(--gray);
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            margin: 3rem 0;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        article {
            background: white;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 5px 20px rgba(0,0,0,0.08);
        }
        .article-header {
            padding: 3rem 2.5rem;
            background: linear-gradient(rgba(10, 20, 40, 0.9), rgba(10, 20, 40, 0.9)), url('https://images.unsplash.com/photo-1556056504-5c7696c4c28d?ixlib=rb-4.0.3&auto=format&fit=crop&w=1600&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            text-align: center;
        }
        .article-header h1 {
            font-size: 3.2rem;
            line-height: 1.2;
            margin-bottom: 1rem;
            font-weight: 900;
        }
        .article-header .meta {
            color: #aaa;
            font-size: 0.95rem;
        }
        .article-body {
            padding: 3rem 2.5rem;
        }
        .article-body h2 {
            color: var(--dark);
            font-size: 2.2rem;
            margin: 3rem 0 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 3px solid var(--primary);
            font-weight: 800;
        }
        .article-body h3 {
            color: var(--dark);
            font-size: 1.7rem;
            margin: 2.5rem 0 1rem;
            font-weight: 700;
        }
        .article-body p {
            margin-bottom: 1.8rem;
            font-size: 1.1rem;
            color: #444;
        }
        .article-body strong {
            color: var(--dark);
            font-weight: 700;
        }
        .article-body em {
            color: var(--secondary);
            font-style: italic;
        }
        .highlight-box {
            background: linear-gradient(135deg, #f8f9ff 0%, #eef2ff 100%);
            border-left: 5px solid var(--primary);
            padding: 2rem;
            margin: 2.5rem 0;
            border-radius: 0 10px 10px 0;
            box-shadow: 0 4px 12px rgba(0,0,0,0.05);
        }
        .highlight-box h4 {
            color: var(--primary);
            font-size: 1.4rem;
            margin-bottom: 1rem;
        }
        .feature-img {
            width: 100%;
            border-radius: 12px;
            margin: 2.5rem 0;
            box-shadow: 0 10px 30px rgba(0,0,0,0.15);
            transition: transform 0.5s ease;
        }
        .feature-img:hover {
            transform: scale(1.01);
        }
        .img-caption {
            text-align: center;
            color: var(--gray);
            font-size: 0.95rem;
            margin-top: -1.5rem;
            margin-bottom: 2.5rem;
            font-style: italic;
        }
        .interactive-section {
            background: #f8fafc;
            border-radius: 12px;
            padding: 2.5rem;
            margin: 3rem 0;
            border: 1px solid #e2e8f0;
        }
        .interactive-section h3 {
            margin-top: 0;
            color: var(--primary);
        }
        form {
            display: grid;
            gap: 1.5rem;
        }
        .form-group {
            display: flex;
            flex-direction: column;
        }
        label {
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: var(--dark);
        }
        input, textarea, select {
            padding: 1rem;
            border: 2px solid #cbd5e0;
            border-radius: 8px;
            font-size: 1rem;
            transition: var(--transition);
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(26, 111, 252, 0.2);
        }
        textarea {
            min-height: 150px;
            resize: vertical;
        }
        .rating-stars {
            display: flex;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .rating-stars i {
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .rating-stars i:hover,
        .rating-stars i.active {
            color: #ffc107;
        }
        .btn {
            background: linear-gradient(to right, var(--primary), #0d5bd9);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 8px;
            font-weight: 700;
            font-size: 1.1rem;
            cursor: pointer;
            transition: var(--transition);
            text-align: center;
            text-decoration: none;
            display: inline-block;
        }
        .btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(26, 111, 252, 0.3);
            background: linear-gradient(to right, #0d5bd9, var(--primary));
        }
        .btn-secondary {
            background: linear-gradient(to right, var(--secondary), #d9321a);
        }
        .btn-secondary:hover {
            background: linear-gradient(to right, #d9321a, var(--secondary));
            box-shadow: 0 10px 20px rgba(252, 60, 26, 0.3);
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .sidebar-widget {
            background: white;
            padding: 2rem;
            border-radius: 12px;
            box-shadow: 0 5px 20px rgba(0,0,0,0.08);
        }
        .sidebar-widget h3 {
            color: var(--dark);
            margin-bottom: 1.5rem;
            padding-bottom: 0.8rem;
            border-bottom: 2px solid var(--primary);
            font-size: 1.5rem;
        }
        .related-links {
            list-style: none;
        }
        .related-links li {
            margin-bottom: 1rem;
            padding-bottom: 1rem;
            border-bottom: 1px solid #eee;
        }
        .related-links a {
            color: #444;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
            transition: var(--transition);
        }
        .related-links a:hover {
            color: var(--primary);
            padding-left: 5px;
        }
        .related-links i {
            color: var(--primary);
        }
        .web-links-section {
            background: #0a1428;
            padding: 3rem 0;
            margin-top: 4rem;
        }
        .web-links-container {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1.5rem;
        }
        .web-link {
            background: rgba(255, 255, 255, 0.05);
            padding: 1.5rem;
            border-radius: 8px;
            border-left: 4px solid var(--primary);
            transition: var(--transition);
        }
        .web-link:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateX(5px);
        }
        .web-link a {
            color: #ddd;
            text-decoration: none;
            font-weight: 600;
            display: block;
            transition: var(--transition);
        }
        .web-link a:hover {
            color: white;
        }
        .web-link p {
            color: #aaa;
            font-size: 0.9rem;
            margin-top: 0.5rem;
        }
        .site-footer {
            background: #050d1c;
            color: #aaa;
            padding: 3rem 0 2rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }
        .footer-logo {
            font-size: 1.8rem;
            font-weight: 800;
            margin-bottom: 1rem;
        }
        .footer-logo a {
            color: white;
            text-decoration: none;
        }
        .footer-logo span {
            background: linear-gradient(to right, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 0.9rem;
            color: #888;
        }
        .text-center { text-align: center; }
        .mt-1 { margin-top: 1rem; }
        .mt-2 { margin-top: 2rem; }
        .mb-1 { margin-bottom: 1rem; }
        .mb-2 { margin-bottom: 2rem; }
        .py-2 { padding-top: 2rem; padding-bottom: 2rem; }
        @media (max-width: 768px) {
            .desktop-nav { display: none; }
            .mobile-nav-toggle { display: block; }
            .article-header h1 { font-size: 2.5rem; }
            .article-header { padding: 2rem 1.5rem; }
            .article-body { padding: 2rem 1.5rem; }
            .article-body h2 { font-size: 1.8rem; }
            .article-body h3 { font-size: 1.5rem; }
            .header-content, .footer-content {
                flex-direction: column;
                text-align: center;
            }
            .interactive-section { padding: 1.8rem; }
        }
        @media (max-width: 480px) {
            .article-header h1 { font-size: 2rem; }
            .btn { width: 100%; }
        }