body { font-family: 'Arial', sans-serif; line-height: 1.6; color: #333; margin: 0; padding: 0; background-color: #f5f5f5; }
        .container { max-width: 1200px; margin: 0 auto; padding: 20px; }
        header { background-color: #1a237e; color: white; padding: 15px 0; position: relative; }
        .logo { font-size: 28px; font-weight: bold; text-align: center; }
        .logo span { color: #ffeb3b; }
        nav { display: flex; justify-content: center; gap: 25px; margin-top: 10px; }
        nav a { color: white; text-decoration: none; font-weight: 500; }
        .mobile-menu-btn { display: none; position: absolute; right: 20px; top: 15px; background: none; border: none; color: white; font-size: 24px; }
        h1 { font-size: 2.2em; margin-bottom: 20px; color: #1a237e; }
        h2 { font-size: 1.8em; margin: 30px 0 15px; color: #303f9f; }
        h3 { font-size: 1.4em; margin: 25px 0 10px; color: #3949ab; }
        .download-btn, .login-btn { display: inline-block; padding: 12px 25px; margin: 15px 0; font-weight: bold; border-radius: 5px; text-align: center; text-decoration: none; }
        .download-btn { background-color: #4caf50; color: white; }
        .login-btn { background-color: #2196f3; color: white; }
        .image-container { text-align: center; margin: 25px 0; }
        .image-container img { max-width: 100%; height: auto; border-radius: 8px; }
        .stats-box { background-color: white; padding: 20px; border-radius: 8px; box-shadow: 0 2px 5px rgba(0,0,0,0.1); margin: 20px 0; }
        .community-section { background-color: #e8eaf6; padding: 20px; border-radius: 8px; margin: 25px 0; }
        footer { background-color: #1a237e; color: white; text-align: center; padding: 20px 0; margin-top: 30px; }
        .tag-list { display: flex; flex-wrap: wrap; gap: 10px; margin: 20px 0; }
        .tag { background-color: #e3f2fd; color: #1a237e; padding: 5px 10px; border-radius: 20px; text-decoration: none; }
        @media (max-width: 768px) {
            nav { flex-direction: column; align-items: center; display: none; }
            nav.active { display: flex; }
            .mobile-menu-btn { display: block; }
            h1 { font-size: 1.8em; }
            h2 { font-size: 1.5em; }
        }