* { margin: 0; padding: 0; box-sizing: border-box; }
        :root {
            --primary: #6ab7ff;
            --secondary: #ffcc5c;
            --accent: #ff6b6b;
            --dark: #2c3e50;
            --light: #f8f9fa;
            --gray: #95a5a6;
            --shadow: 0 4px 12px rgba(0,0,0,0.08);
            --transition: all 0.3s ease;
            --border-radius: 12px;
        }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.8;
            color: #333;
            background: linear-gradient(135deg, #f5f7fa 0%, #e4edf5 100%);
            min-height: 100vh;
            padding-top: 80px;
        }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--accent); }
        img { max-width: 100%; height: auto; display: block; }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .btn {
            display: inline-block;
            background: var(--primary);
            color: white;
            padding: 12px 28px;
            border-radius: 50px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: var(--transition);
        }
        .btn:hover { background: var(--accent); transform: translateY(-3px); box-shadow: var(--shadow); }
        .section-padding { padding: 60px 0; }
        .text-center { text-align: center; }
        .mb-1 { margin-bottom: 1rem; }
        .mb-2 { margin-bottom: 2rem; }
        .mb-3 { margin-bottom: 3rem; }
        .mt-2 { margin-top: 2rem; }
        .highlight { background: linear-gradient(120deg, #a1c4fd 0%, #c2e9fb 100%); padding: 2px 6px; border-radius: 4px; }
        header {
            position: fixed;
            top: 0;
            width: 100%;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            box-shadow: var(--shadow);
            z-index: 1000;
            padding: 15px 0;
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 800;
            background: linear-gradient(to right, var(--primary), var(--accent));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            letter-spacing: -0.5px;
        }
        .my-logo:hover { transform: scale(1.05); }
        .desktop-nav { display: flex; gap: 30px; }
        .desktop-nav a {
            font-weight: 600;
            position: relative;
            padding: 5px 0;
        }
        .desktop-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent);
            transition: width 0.3s;
        }
        .desktop-nav a:hover::after { width: 100%; }
        .mobile-toggle {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: var(--dark);
        }
        .mobile-nav {
            display: none;
            flex-direction: column;
            background: white;
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            box-shadow: var(--shadow);
            padding: 20px;
            border-radius: 0 0 var(--border-radius) var(--border-radius);
        }
        .mobile-nav.active { display: flex; }
        .mobile-nav a {
            padding: 15px;
            border-bottom: 1px solid #eee;
            font-weight: 600;
        }
        .mobile-nav a:last-child { border-bottom: none; }
        .breadcrumb {
            padding: 15px 0;
            font-size: 0.9rem;
            color: var(--gray);
        }
        .breadcrumb a { color: var(--gray); }
        .breadcrumb a:hover { color: var(--primary); }
        .breadcrumb span { margin: 0 8px; }
        main { background: white; border-radius: var(--border-radius); box-shadow: var(--shadow); overflow: hidden; }
        .article-header {
            background: linear-gradient(rgba(106, 183, 255, 0.85), rgba(255, 204, 92, 0.85)), url('https://images.unsplash.com/photo-1518709268805-4e9042af2176?ixlib=rb-4.0.3&auto=format&fit=crop&w=1200&q=80') center/cover no-repeat;
            color: white;
            padding: 80px 20px;
            text-align: center;
        }
        .article-header h1 {
            font-size: 3.2rem;
            margin-bottom: 20px;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
        }
        .article-header .meta {
            font-size: 1rem;
            opacity: 0.9;
        }
        .article-content {
            padding: 50px;
        }
        .article-content h2 {
            font-size: 2.2rem;
            color: var(--dark);
            border-left: 5px solid var(--primary);
            padding-left: 15px;
            margin: 3rem 0 1.5rem;
        }
        .article-content h3 {
            font-size: 1.8rem;
            color: var(--dark);
            margin: 2.5rem 0 1rem;
        }
        .article-content h4 {
            font-size: 1.4rem;
            color: var(--gray);
            margin: 2rem 0 1rem;
        }
        .article-content p {
            margin-bottom: 1.8rem;
            font-size: 1.1rem;
            text-align: justify;
        }
        .article-content blockquote {
            border-left: 4px solid var(--secondary);
            padding-left: 25px;
            margin: 2rem 0;
            font-style: italic;
            color: #555;
            background: #f9f9f9;
            padding: 20px;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .article-content ul, .article-content ol {
            margin-left: 25px;
            margin-bottom: 1.8rem;
        }
        .article-content li { margin-bottom: 0.8rem; }
        .feature-img {
            width: 80%;
            margin: 40px auto;
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .feature-img img { width: 100%; transition: transform 0.5s; }
        .feature-img img:hover { transform: scale(1.02); }
        .caption { text-align: center; font-style: italic; color: var(--gray); margin-top: 10px; }
        .interactive-module {
            background: #f0f8ff;
            border-radius: var(--border-radius);
            padding: 30px;
            margin: 40px 0;
            border: 1px dashed var(--primary);
        }
        .module-title { display: flex; align-items: center; gap: 10px; color: var(--dark); margin-bottom: 25px; }
        .module-title i { font-size: 1.5rem; color: var(--accent); }
        .form-group { margin-bottom: 20px; }
        .form-group label { display: block; margin-bottom: 8px; font-weight: 600; }
        .form-group input, .form-group textarea, .form-group select {
            width: 100%;
            padding: 15px;
            border: 2px solid #ddd;
            border-radius: var(--border-radius);
            font-family: inherit;
            transition: var(--transition);
        }
        .form-group input:focus, .form-group textarea:focus, .form-group select:focus {
            border-color: var(--primary);
            outline: none;
        }
        .rating { display: flex; gap: 10px; margin: 15px 0; }
        .rating i { font-size: 1.8rem; color: #ddd; cursor: pointer; transition: var(--transition); }
        .rating i:hover, .rating i.active { color: #ffcc00; }
        .related-links {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 20px;
            margin: 50px 0;
        }
        .link-card {
            background: white;
            border-radius: var(--border-radius);
            padding: 25px;
            box-shadow: var(--shadow);
            transition: var(--transition);
            border: 1px solid transparent;
        }
        .link-card:hover {
            transform: translateY(-10px);
            border-color: var(--primary);
        }
        .link-card h4 { margin-top: 0; }
        .link-card p { font-size: 0.95rem; color: #666; }
        footer {
            background: var(--dark);
            color: white;
            padding: 60px 0 30px;
            margin-top: 60px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-section h3 { font-size: 1.5rem; margin-bottom: 25px; position: relative; padding-bottom: 10px; }
        .footer-section h3::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 50px;
            height: 3px;
            background: var(--primary);
        }
        .footer-links { list-style: none; }
        .footer-links li { margin-bottom: 12px; }
        .footer-links a { color: #bbb; }
        .footer-links a:hover { color: white; padding-left: 5px; }
        friend-link {
            display: inline-block;
            background: rgba(255,255,255,0.1);
            padding: 8px 16px;
            border-radius: 20px;
            margin: 5px;
            font-size: 0.9rem;
        }
        friend-link a { color: #6ab7ff; }
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 0.9rem;
            color: #bbb;
        }
        @media (max-width: 992px) {
            .article-header h1 { font-size: 2.8rem; }
            .article-content { padding: 40px 30px; }
            .desktop-nav { display: none; }
            .mobile-toggle { display: block; }
        }
        @media (max-width: 768px) {
            body { padding-top: 70px; }
            .article-header h1 { font-size: 2.2rem; }
            .article-content { padding: 30px 20px; }
            .article-content h2 { font-size: 1.8rem; }
            .article-content h3 { font-size: 1.5rem; }
            .feature-img { width: 100%; }
            .interactive-module { padding: 20px; }
        }
        @media (max-width: 480px) {
            .article-header h1 { font-size: 1.8rem; }
            .article-content h2 { font-size: 1.5rem; }
            .btn { padding: 10px 20px; }
        }