* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.8;
            color: #333;
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            min-height: 100vh;
        }
        h1, h2, h3, h4 {
            color: #1a237e;
            margin-bottom: 1rem;
            font-weight: 700;
        }
        h1 {
            font-size: 2.8rem;
            text-align: center;
            margin-top: 2rem;
            background: linear-gradient(90deg, #1a237e, #3949ab);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            padding-bottom: 0.5rem;
            border-bottom: 3px solid #3949ab;
        }
        h2 {
            font-size: 2.2rem;
            border-left: 5px solid #ff9800;
            padding-left: 15px;
            margin-top: 3rem;
        }
        h3 {
            font-size: 1.8rem;
            color: #3949ab;
            margin-top: 2rem;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.2rem;
            text-align: justify;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, #1a237e 0%, #3949ab 100%);
            color: white;
            padding: 1rem 0;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo {
            font-size: 1.8rem;
            font-weight: 900;
            text-decoration: none;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo i {
            color: #ff9800;
        }
        .desktop-nav {
            display: flex;
            gap: 2rem;
        }
        .desktop-nav a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 5px;
            transition: all 0.3s ease;
        }
        .desktop-nav a:hover {
            background: rgba(255, 255, 255, 0.2);
            transform: translateY(-2px);
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        .mobile-nav {
            display: none;
            flex-direction: column;
            background: #1a237e;
            position: absolute;
            top: 100%;
            left: 0;
            right: 0;
            padding: 1rem;
            box-shadow: 0 4px 12px rgba(0,0,0,0.2);
        }
        .mobile-nav.active {
            display: flex;
        }
        .mobile-nav a {
            color: white;
            text-decoration: none;
            padding: 0.8rem;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }
        .breadcrumb {
            background: #e8eaf6;
            padding: 1rem;
            border-radius: 8px;
            margin: 1rem 0;
        }
        .breadcrumb a {
            color: #3949ab;
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .search-container {
            background: white;
            padding: 2rem;
            border-radius: 12px;
            box-shadow: 0 6px 20px rgba(0,0,0,0.08);
            margin: 2rem 0;
            text-align: center;
        }
        .search-form {
            display: flex;
            max-width: 600px;
            margin: 0 auto;
        }
        .search-input {
            flex: 1;
            padding: 1rem;
            border: 2px solid #3949ab;
            border-radius: 8px 0 0 8px;
            font-size: 1.1rem;
        }
        .search-button {
            background: #3949ab;
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 8px 8px 0;
            cursor: pointer;
            font-size: 1.1rem;
            transition: background 0.3s;
        }
        .search-button:hover {
            background: #1a237e;
        }
        .content-section {
            background: white;
            padding: 2.5rem;
            border-radius: 15px;
            box-shadow: 0 8px 25px rgba(0,0,0,0.06);
            margin-bottom: 2rem;
        }
        .highlight {
            background: linear-gradient(120deg, #e3f2fd 0%, #bbdefb 100%);
            border-left: 5px solid #2196f3;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
        }
        .feature-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 1.5rem;
            margin: 2rem 0;
        }
        .feature-card {
            background: #f5f5f5;
            padding: 1.5rem;
            border-radius: 10px;
            transition: transform 0.3s;
        }
        .feature-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        .feature-card i {
            color: #ff9800;
            font-size: 2rem;
            margin-bottom: 1rem;
        }
        .article-image {
            width: 100%;
            max-width: 800px;
            height: auto;
            border-radius: 12px;
            margin: 2rem auto;
            display: block;
            box-shadow: 0 10px 30px rgba(0,0,0,0.1);
        }
        .user-interaction {
            background: #f8f9fa;
            padding: 2rem;
            border-radius: 12px;
            margin: 3rem 0;
        }
        .rating-system, .comment-form {
            margin: 2rem 0;
        }
        .stars {
            display: flex;
            gap: 5px;
            margin: 1rem 0;
        }
        .star {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star:hover,
        .star.active {
            color: #ff9800;
        }
        textarea, input[type="text"], input[type="email"] {
            width: 100%;
            padding: 1rem;
            margin: 0.5rem 0 1rem;
            border: 2px solid #ddd;
            border-radius: 8px;
            font-size: 1rem;
        }
        .submit-button {
            background: linear-gradient(135deg, #4caf50, #2e7d32);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 8px;
            font-size: 1.1rem;
            cursor: pointer;
            transition: transform 0.3s;
        }
        .submit-button:hover {
            transform: scale(1.05);
        }
        .web-links {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1rem;
            margin: 3rem 0;
        }
        .web-link {
            background: white;
            padding: 1rem;
            border-radius: 8px;
            box-shadow: 0 3px 10px rgba(0,0,0,0.05);
        }
        .web-link a {
            color: #3949ab;
            text-decoration: none;
            font-weight: 600;
        }
        .web-link a:hover {
            text-decoration: underline;
        }
        footer {
            background: #1a237e;
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 0.9rem;
            opacity: 0.8;
        }
        @media (max-width: 768px) {
            .desktop-nav {
                display: none;
            }
            .hamburger {
                display: block;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            .content-section {
                padding: 1.5rem;
            }
            .search-form {
                flex-direction: column;
            }
            .search-input {
                border-radius: 8px;
                margin-bottom: 10px;
            }
            .search-button {
                border-radius: 8px;
                padding: 1rem;
            }
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .content-section, .feature-card {
            animation: fadeIn 0.6s ease-out;
        }
        @media print {
            .user-interaction, .search-container, footer {
                display: none;
            }
        }