:root { --primary: #0056b3; --bg: #f8f9fa; --text: #333; --border: #e2e8f0; }
    * { box-sizing: border-box; }
    body { font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif; margin: 0; padding: 0; background: var(--bg); color: var(--text); line-height: 1.7; }
    .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
    header { background: #fff; box-shadow: 0 2px 5px rgba(0,0,0,0.05); padding: 15px 0; position: sticky; top: 0; z-index: 100; }
    .nav-bar { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; }
    .logo a { font-size: 22px; font-weight: bold; color: var(--primary); text-decoration: none; display: flex; align-items: center; }
    nav.main-nav a { margin-left: 15px; text-decoration: none; color: var(--text); font-weight: 500; }
    nav.main-nav a:hover { color: var(--primary); }
    
    .breadcrumb { padding: 15px 0; font-size: 14px; background: transparent; }
    .breadcrumb ol { list-style: none; display: flex; padding: 0; margin: 0; flex-wrap: wrap; }
    .breadcrumb li::after { content: "›"; margin: 0 10px; color: #999; }
    .breadcrumb li:last-child::after { content: ""; }
    .breadcrumb a { text-decoration: none; color: var(--primary); }
    
    main { padding: 20px 0 60px; min-height: 70vh; }
    h1 { color: var(--primary); font-size: 2.2rem; margin-bottom: 20px; border-bottom: 2px solid var(--primary); padding-bottom: 10px; }
    h2 { color: #2c3e50; font-size: 1.5rem; margin-top: 30px; margin-bottom: 15px; border-left: 4px solid var(--primary); padding-left: 10px; }
    h3 { color: #34495e; font-size: 1.2rem; margin-top: 20px; }
    
    .card, section.content-block { background: #fff; padding: 25px; border-radius: 8px; box-shadow: 0 2px 8px rgba(0,0,0,0.05); margin-bottom: 25px; border: 1px solid var(--border); }
    
    ul.feature-list { list-style-type: none; padding: 0; }
    ul.feature-list li { margin-bottom: 10px; padding-left: 25px; position: relative; }
    ul.feature-list li::before { content: '✓'; position: absolute; left: 0; color: #25D366; font-weight: bold; }
    
    .grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 15px; }
    .grid a { display: block; background: #fff; padding: 15px; border-radius: 8px; text-decoration: none; color: var(--text); border: 1px solid var(--border); transition: 0.3s; font-weight: bold; }
    .grid a:hover { transform: translateY(-3px); box-shadow: 0 4px 10px rgba(0,0,0,0.1); border-color: var(--primary); color: var(--primary); }
    
    .reviews { border-left: 4px solid #f1c40f; background: #faf9f0; padding: 15px 20px; margin-bottom: 20px; border-radius: 0 8px 8px 0; }
    .faq-container details { background: #fff; padding: 15px; border: 1px solid var(--border); border-radius: 8px; margin-bottom: 15px; cursor: pointer; }
    .faq-container summary { font-weight: bold; color: var(--primary); font-size: 1.1rem; outline: none; }
    .faq-container details p { margin-top: 15px; padding-top: 15px; border-top: 1px dashed var(--border); line-height: 1.6; }
    
    footer { background: #1a1a1a; color: #f1f1f1; text-align: center; padding: 30px 0; }
    footer a { color: #4dabf7; text-decoration: none; }
    
    .whatsapp-btn { position: fixed; bottom: 30px; right: 30px; background: #25D366; color: white; padding: 15px 25px; border-radius: 50px; text-decoration: none; font-weight: bold; font-size: 18px; box-shadow: 0 4px 15px rgba(37,211,102,0.4); z-index: 999; display: flex; align-items: center; transition: 0.3s; }
    .whatsapp-btn:hover { background: #128C7E; transform: translateY(-3px); box-shadow: 0 6px 20px rgba(37,211,102,0.6); }
    
    @media (max-width: 768px) { 
        .nav-bar { flex-direction: column; text-align: center; } 
        nav.main-nav { margin-top: 15px; display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; } 
        nav.main-nav a { margin: 5px 10px; } 
        h1 { font-size: 1.8rem; }
        .whatsapp-btn { bottom: 15px; right: 15px; padding: 12px 20px; font-size: 16px; }
    }