* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        :root {
            --primary: #2c3e50;
            --secondary: #3498db;
            --accent: #e74c3c;
            --light: #ecf0f1;
            --dark: #1a252f;
            --text: #333;
            --gray: #95a5a6;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
            --border-radius: 8px;
        }
        body {
            color: var(--text);
            background-color: #f9f9f9;
            line-height: 1.6;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .flex {
            display: flex;
            flex-wrap: wrap;
        }
        .grid {
            display: grid;
        }
        .text-center {
            text-align: center;
        }
        .section-padding {
            padding: 60px 0;
        }
        .btn {
            display: inline-block;
            padding: 12px 28px;
            background-color: var(--secondary);
            color: white;
            border: none;
            border-radius: var(--border-radius);
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
        }
        .btn:hover {
            background-color: #2980b9;
            transform: translateY(-3px);
            box-shadow: var(--shadow);
        }
        header {
            background-color: var(--primary);
            color: white;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-top {
            padding: 15px 0;
            justify-content: space-between;
            align-items: center;
        }
        .logo {
            font-size: 2.2rem;
            font-weight: 800;
            color: white;
            letter-spacing: 1px;
        }
        .logo span {
            color: var(--secondary);
        }
        .nav-desktop {
            display: flex;
            gap: 30px;
        }
        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }
        }
        .nav-desktop a {
            font-weight: 500;
            padding: 8px 0;
            position: relative;
        }
        .nav-desktop a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--accent);
            transition: var(--transition);
        }
        .nav-desktop a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            background: none;
            border: none;
            color: white;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
        }
        .nav-mobile {
            position: fixed;
            top: 70px;
            left: -100%;
            width: 100%;
            height: calc(100vh - 70px);
            background-color: var(--dark);
            flex-direction: column;
            padding: 30px;
            transition: var(--transition);
            z-index: 999;
        }
        .nav-mobile.active {
            left: 0;
        }
        .nav-mobile a {
            padding: 15px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 1.2rem;
        }
        .breadcrumb {
            padding: 15px 0;
            background-color: var(--light);
            font-size: 0.9rem;
            color: var(--gray);
        }
        .breadcrumb a:hover {
            color: var(--secondary);
        }
        .breadcrumb i {
            margin: 0 8px;
        }
        .article-header {
            padding: 40px 0;
            text-align: center;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            margin-bottom: 40px;
        }
        .article-header h1 {
            font-size: 3.2rem;
            margin-bottom: 15px;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
        }
        @media (max-width: 768px) {
            .article-header h1 {
                font-size: 2.5rem;
            }
        }
        .article-meta {
            font-style: italic;
            opacity: 0.9;
            margin-top: 10px;
        }
        main {
            max-width: 900px;
            margin: 0 auto 60px;
            padding: 0 20px;
        }
        .article-section {
            margin-bottom: 50px;
            padding: 30px;
            background-color: white;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        h2 {
            color: var(--primary);
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 3px solid var(--secondary);
            font-size: 2.2rem;
        }
        h3 {
            color: var(--dark);
            margin: 25px 0 15px;
            font-size: 1.7rem;
        }
        p {
            margin-bottom: 20px;
            font-size: 1.1rem;
            line-height: 1.8;
        }
        .highlight {
            background-color: #fffacd;
            padding: 20px;
            border-left: 5px solid #f39c12;
            margin: 25px 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .emoji {
            font-size: 1.3rem;
            margin-right: 8px;
        }
        b, strong {
            color: var(--primary);
        }
        .featured-img {
            width: 100%;
            margin: 30px 0;
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .interactive-box {
            background-color: #f8f9fa;
            border: 2px dashed #ccc;
            padding: 30px;
            border-radius: var(--border-radius);
            margin: 40px 0;
        }
        .interactive-box h3 {
            color: var(--accent);
        }
        form {
            margin-top: 20px;
        }
        .form-group {
            margin-bottom: 20px;
        }
        label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
        }
        input, textarea, select {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid #ddd;
            border-radius: var(--border-radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: var(--secondary);
            box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
        }
        .stars {
            display: flex;
            gap: 10px;
            margin: 10px 0;
        }
        .star {
            font-size: 1.8rem;
            color: var(--gray);
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover,
        .star.active {
            color: #f1c40f;
        }
        .web-links {
            background-color: var(--light);
            padding: 40px 0;
            margin-top: 60px;
        }
        .web-link {
            display: inline-block;
            margin: 10px 15px;
            padding: 12px 25px;
            background-color: white;
            border-radius: 50px;
            box-shadow: var(--shadow);
            transition: var(--transition);
            font-weight: 500;
        }
        .web-link:hover {
            background-color: var(--secondary);
            color: white;
            transform: translateY(-5px);
        }
        footer {
            background-color: var(--dark);
            color: white;
            padding: 60px 0 30px;
        }
        .footer-content {
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-section h4 {
            font-size: 1.4rem;
            margin-bottom: 20px;
            color: var(--light);
        }
        .footer-links a {
            display: block;
            margin-bottom: 10px;
            color: #ccc;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--secondary);
            padding-left: 5px;
        }
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #aaa;
            font-size: 0.9rem;
        }
        .schema-data {
            display: none;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 15px;
            }
            .section-padding {
                padding: 40px 0;
            }
            h2 {
                font-size: 1.8rem;
            }
            h3 {
                font-size: 1.5rem;
            }
            .article-section {
                padding: 20px;
            }
            .web-link {
                margin: 8px 10px;
                padding: 10px 20px;
                font-size: 0.9rem;
            }
        }