html {
      scroll-behavior: smooth;
    }
    
    body {
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    }
    
    .hero-section {
      background-image: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('image/z_u.pdf.png');
      background-size: cover;
      background-position: center;
      height: 80vh;
      position: relative;
    }
    
    .section-padding {
      padding: 5rem 0;
    }
    
    .news-card {
      transition: transform 0.3s ease, box-shadow 0.3s ease;
    }
    
    .news-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    }
    
    .program-card {
      transition: transform 0.3s ease;
    }
    
    .program-card:hover {
      transform: translateY(-5px);
    }
    
    .back-to-top {
      display: none;
      position: fixed;
      bottom: 20px;
      right: 20px;
      z-index: 99;
      transition: opacity 0.3s;
    }
    
    .loader {
      border: 5px solid #f3f3f3;
      border-top: 5px solid #3498db;
      border-radius: 50%;
      width: 50px;
      height: 50px;
      animation: spin 1s linear infinite;
      margin: 20px auto;
    }
    
    @keyframes spin {
      0% { transform: rotate(0deg); }
      100% { transform: rotate(360deg); }
    }

    .navigation-link {
      position: relative;
    }

    .navigation-link::after {
      content: '';
      position: absolute;
      bottom: -5px;
      left: 0;
      width: 0;
      height: 2px;
      background-color: #4F46E5;
      transition: width 0.3s ease;
    }

    .navigation-link:hover::after {
      width: 100%;
    }

    .testimonial-container {
      overflow-x: hidden;
    }

    .testimonial-slider {
      display: flex;
      transition: transform 0.5s ease;
    }

    .stat-item {
      border-right: 1px solid #e5e7eb;
    }
    
    .stat-item:last-child {
      border-right: none;
    }