:root {
      --page-index-primary-color: #007bff; /* Xanh dương cho nút chính */
      --page-index-secondary-color: #6c757d; /* Xám cho văn bản phụ */
      --page-index-accent-color: #ffc107; /* Vàng cho điểm nhấn, khuyến mãi */
      --page-index-text-color: #333333; /* Xám đen cho văn bản chính */
      --page-index-bg-light: #f8f9fa; /* Nền sáng */
      --page-index-bg-white: #ffffff; /* Nền trắng */
      --page-index-border-color: #dee2e6; /* Màu viền */
      --page-index-success-color: #28a745; /* Màu xanh lá cho thành công */
    }

    body {
      font-family: 'Arial', sans-serif;
      line-height: 1.6;
      color: var(--page-index-text-color);
      background-color: var(--page-index-bg-light);
    }

    .page-index-container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 20px;
    }

    .page-index-hero {
      background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), url('[GALLERY:background:tt88,bancanohu,hero_banner]') no-repeat center center/cover;
      color: var(--page-index-bg-white);
      padding: 60px 20px;
      text-align: center;
      border-radius: 10px;
      margin-bottom: 30px;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    }

    .page-index-hero h1 {
      font-size: 2.8em;
      margin-bottom: 20px;
      color: var(--page-index-accent-color);
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    }

    .page-index-hero p {
      font-size: 1.2em;
      margin-bottom: 30px;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
    }

    .page-index-btn {
      display: inline-block;
      background-color: var(--page-index-primary-color);
      color: var(--page-index-bg-white);
      padding: 12px 30px;
      border-radius: 5px;
      text-decoration: none;
      font-weight: bold;
      font-size: 1.1em;
      transition: background-color 0.3s ease, transform 0.2s ease;
      border: none;
      cursor: pointer;
      box-shadow: 0 4px 10px rgba(0, 123, 255, 0.4);
    }

    .page-index-btn:hover {
      background-color: #0056b3; /* Darker blue */
      transform: translateY(-2px);
    }

    .page-index-btn-secondary {
      background-color: var(--page-index-accent-color);
      color: var(--page-index-text-color);
      margin-left: 15px;
      box-shadow: 0 4px 10px rgba(255, 193, 7, 0.4);
    }

    .page-index-btn-secondary:hover {
      background-color: #e0a800; /* Darker yellow */
      color: var(--page-index-text-color);
    }

    .page-index-section {
      background-color: var(--page-index-bg-white);
      padding: 40px;
      border-radius: 10px;
      margin-bottom: 30px;
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    }

    .page-index-section h2 {
      font-size: 2em;
      color: var(--page-index-primary-color);
      margin-bottom: 25px;
      text-align: center;
      position: relative;
      padding-bottom: 10px;
    }

    .page-index-section h2::after {
      content: '';
      position: absolute;
      left: 50%;
      bottom: 0;
      transform: translateX(-50%);
      width: 80px;
      height: 3px;
      background-color: var(--page-index-accent-color);
      border-radius: 2px;
    }

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

    .page-index-card {
      background-color: var(--page-index-bg-light);
      border-radius: 8px;
      padding: 20px;
      text-align: center;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .page-index-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 6px 15px rgba(0, 0, 0, 0.12);
    }

    .page-index-card img {
      max-width: 100px;
      height: auto;
      margin-bottom: 15px;
      border-radius: 5px;
    }

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

    .page-index-card p {
      font-size: 0.95em;
      color: var(--page-index-secondary-color);
      flex-grow: 1;
    }

    .page-index-card .page-index-btn {
      margin-top: 20px;
      padding: 8px 15px;
      font-size: 0.9em;
    }

    .page-index-steps {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 20px;
      margin-top: 30px;
    }

    .page-index-step-item {
      flex: 1 1 280px;
      background-color: var(--page-index-bg-light);
      border-radius: 8px;
      padding: 25px;
      text-align: center;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
      min-width: 250px;
    }

    .page-index-step-item .icon {
      font-size: 3em;
      color: var(--page-index-accent-color);
      margin-bottom: 15px;
    }

    .page-index-step-item h3 {
      font-size: 1.4em;
      color: var(--page-index-primary-color);
      margin-bottom: 10px;
    }

    .page-index-step-item p {
      color: var(--page-index-text-color);
    }

    .page-index-promo-banner {
      background-color: var(--page-index-primary-color);
      color: var(--page-index-bg-white);
      padding: 30px 20px;
      text-align: center;
      border-radius: 10px;
      margin-bottom: 30px;
      box-shadow: 0 4px 15px rgba(0, 123, 255, 0.3);
    }

    .page-index-promo-banner h3 {
      font-size: 2em;
      margin-bottom: 15px;
      color: var(--page-index-accent-color);
    }

    .page-index-promo-banner p {
      font-size: 1.1em;
      margin-bottom: 25px;
    }

    .page-index-usp-list {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 20px;
      margin-top: 30px;
    }

    .page-index-usp-item {
      flex: 1 1 300px;
      background-color: var(--page-index-bg-white);
      border-left: 5px solid var(--page-index-primary-color);
      padding: 20px;
      border-radius: 8px;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    }

    .page-index-usp-item h3 {
      color: var(--page-index-primary-color);
      margin-bottom: 10px;
      font-size: 1.25em;
    }

    .page-index-usp-item p {
      color: var(--page-index-text-color);
      font-size: 0.95em;
    }

    .page-index-floating-cta {
      position: fixed;
      bottom: 20px;
      right: 20px;
      background-color: var(--page-index-success-color);
      color: var(--page-index-bg-white);
      padding: 15px 25px;
      border-radius: 50px;
      text-decoration: none;
      font-weight: bold;
      font-size: 1.1em;
      box-shadow: 0 6px 20px rgba(40, 167, 69, 0.4);
      z-index: 1000;
      transition: transform 0.3s ease, background-color 0.3s ease;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .page-index-floating-cta:hover {
      background-color: #218838;
      transform: translateY(-3px);
    }

    .page-index-floating-cta .icon {
      font-size: 1.5em;
    }

    /* Responsive adjustments */
    @media (max-width: 768px) {
      .page-index-hero {
        padding: 40px 15px;
      }
      .page-index-hero h1 {
        font-size: 2em;
      }
      .page-index-hero p {
        font-size: 1em;
      }
      .page-index-btn {
        padding: 10px 20px;
        font-size: 1em;
        margin: 5px 0;
      }
      .page-index-btn-secondary {
        margin-left: 0;
      }
      .page-index-section {
        padding: 20px;
      }
      .page-index-section h2 {
        font-size: 1.8em;
      }
      .page-index-grid {
        grid-template-columns: 1fr;
      }
      .page-index-steps {
        flex-direction: column;
      }
      .page-index-step-item {
        flex: none;
        width: 100%;
      }
      .page-index-promo-banner h3 {
        font-size: 1.5em;
      }
      .page-index-floating-cta {
        bottom: 15px;
        right: 15px;
        padding: 12px 20px;
        font-size: 0.95em;
      }
    }