:root {
      --page-nn88-primary-color: #e02b2b; /* Đỏ mạnh */
      --page-nn88-secondary-color: #ffc107; /* Vàng hổ phách */
      --page-nn88-background-light: #f8f9fa; /* Nền sáng */
      --page-nn88-text-dark: #212529; /* Chữ tối */
      --page-nn88-text-light: #ffffff; /* Chữ sáng */
      --page-nn88-accent-blue: #007bff; /* Xanh dương */
      --page-nn88-border-color: #dee2e6;
    }

    .page-nn88 {
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
      color: var(--page-nn88-text-dark);
      line-height: 1.6;
      background-color: var(--page-nn88-background-light);
    }

    .page-nn88-section {
      padding: 40px 20px;
      margin: 0 auto;
      max-width: 1200px;
      text-align: center;
    }

    .page-nn88-section.page-nn88-hero {
      background-color: #1a1a1a; /* Nền tối cho banner */
      color: var(--page-nn88-text-light);
      padding: 0; /* Loại bỏ padding để banner chiếm toàn bộ */
      position: relative;
    }

    .page-nn88-hero-banner {
      width: 100%;
      height: 250px; /* Chiều cao cố định cho banner trên di động */
      object-fit: cover;
      display: block;
      margin: 0 auto;
    }

    .page-nn88-hero-content {
      position: relative; /* Đảm bảo nội dung nằm trên banner */
      z-index: 1;
      padding: 20px;
      text-align: center;
      background: linear-gradient(to top, rgba(0,0,0,0.7), rgba(0,0,0,0)); /* Hiệu ứng mờ dần */
      margin-top: -100px; /* Kéo lên trên banner */
      color: var(--page-nn88-text-light);
    }

    .page-nn88-hero-content h1 {
      font-size: 2.2em;
      margin-bottom: 10px;
      color: var(--page-nn88-secondary-color);
      line-height: 1.2;
    }

    .page-nn88-hero-content p {
      font-size: 1.1em;
      margin-bottom: 20px;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
    }

    .page-nn88-btn {
      display: inline-block;
      background-color: var(--page-nn88-primary-color);
      color: var(--page-nn88-text-light);
      padding: 12px 25px;
      border-radius: 8px;
      text-decoration: none;
      font-weight: bold;
      transition: background-color 0.3s ease, transform 0.2s ease;
      border: none;
      cursor: pointer;
      font-size: 1.1em;
    }

    .page-nn88-btn:hover {
      background-color: #c02222; /* Đỏ đậm hơn */
      transform: translateY(-2px);
    }

    .page-nn88-floating-btn {
      position: fixed;
      bottom: 20px;
      right: 20px;
      z-index: 1000;
      background-color: var(--page-nn88-primary-color);
      color: var(--page-nn88-text-light);
      padding: 15px 25px;
      border-radius: 50px;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
      text-decoration: none;
      font-weight: bold;
      font-size: 1.1em;
      display: flex;
      align-items: center;
      gap: 8px;
      animation: page-nn88-pulse 2s infinite;
    }

    .page-nn88-floating-btn:hover {
      background-color: #c02222;
      transform: scale(1.05);
      animation: none;
    }

    @keyframes page-nn88-pulse {
      0% { transform: scale(1); box-shadow: 0 0 0 0 rgba(224, 43, 43, 0.7); }
      70% { transform: scale(1.05); box-shadow: 0 0 0 15px rgba(224, 43, 43, 0); }
      100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(224, 43, 43, 0); }
    }

    .page-nn88-heading {
      font-size: 2em;
      margin-bottom: 30px;
      color: var(--page-nn88-primary-color);
      position: relative;
      padding-bottom: 10px;
    }

    .page-nn88-heading::after {
      content: '';
      position: absolute;
      left: 50%;
      bottom: 0;
      transform: translateX(-50%);
      width: 80px;
      height: 4px;
      background-color: var(--page-nn88-secondary-color);
      border-radius: 2px;
    }

    .page-nn88-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 25px;
      margin-top: 30px;
    }

    .page-nn88-card {
      background-color: var(--page-nn88-text-light);
      border-radius: 10px;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
      padding: 20px;
      text-align: center;
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      border: 1px solid var(--page-nn88-border-color);
    }

    .page-nn88-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    }

    .page-nn88-card img {
      width: 100%;
      max-width: 250px;
      height: 150px;
      object-fit: contain;
      margin-bottom: 15px;
      border-radius: 8px;
      display: block;
      margin-left: auto;
      margin-right: auto;
    }

    .page-nn88-card h3 {
      font-size: 1.3em;
      color: var(--page-nn88-primary-color);
      margin-bottom: 10px;
      line-height: 1.3;
    }

    .page-nn88-card p {
      font-size: 0.95em;
      color: #555;
      flex-grow: 1;
    }

    .page-nn88-card a.page-nn88-btn {
      margin-top: 20px;
      width: fit-content;
      align-self: center;
    }

    .page-nn88-highlight {
      background-color: var(--page-nn88-accent-blue);
      color: var(--page-nn88-text-light);
      padding: 30px 20px;
      margin-top: 40px;
      border-radius: 10px;
    }

    .page-nn88-highlight h2 {
      color: var(--page-nn88-text-light);
      font-size: 2em;
      margin-bottom: 15px;
    }

    .page-nn88-highlight p {
      font-size: 1.1em;
      margin-bottom: 25px;
      max-width: 900px;
      margin-left: auto;
      margin-right: auto;
    }

    .page-nn88-list {
      text-align: left;
      margin-top: 20px;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
    }

    .page-nn88-list li {
      background-color: var(--page-nn88-text-light);
      margin-bottom: 10px;
      padding: 15px;
      border-radius: 8px;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
      list-style: none;
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1em;
    }

    .page-nn88-list li::before {
      content: '✅';
      font-size: 1.2em;
    }

    .page-nn88-app-section {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 30px;
      margin-top: 40px;
    }

    .page-nn88-app-section img {
      max-width: 200px;
      height: auto;
      border-radius: 15px;
      box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    }

    .page-nn88-app-links {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 15px;
    }

    .page-nn88-app-links .page-nn88-btn {
      padding: 10px 20px;
      font-size: 1em;
    }

    /* Responsive adjustments */
    @media (min-width: 768px) {
      .page-nn88-hero-banner {
        height: 400px; /* Chiều cao lớn hơn trên desktop */
      }
      .page-nn88-hero-content {
        margin-top: -150px; /* Kéo lên trên banner */
      }
      .page-nn88-hero-content h1 {
        font-size: 3em;
      }
      .page-nn88-hero-content p {
        font-size: 1.2em;
      }
      .page-nn88-section {
        padding: 60px 30px;
      }
      .page-nn88-heading {
        font-size: 2.5em;
      }
      .page-nn88-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      }
      .page-nn88-floating-btn {
        bottom: 30px;
        right: 30px;
        font-size: 1.2em;
        padding: 18px 30px;
      }
      .page-nn88-app-section {
        flex-direction: row;
        justify-content: center;
      }
    }

    @media (min-width: 1024px) {
      .page-nn88-hero-banner {
        height: 500px;
      }
    }