/* Tổng quan */
    :root {
      --page-w88-primary-color: #f0b400; /* Vàng hổ phách */
      --page-w88-secondary-color: #ffffff; /* Trắng */
      --page-w88-dark-bg: #1a1a1a; /* Nền tối */
      --page-w88-darker-bg: #0d0d0d; /* Nền tối hơn */
      --page-w88-text-color: #e0e0e0; /* Màu chữ nhạt */
      --page-w88-accent-color: #e53935; /* Đỏ nhấn */
    }

    .page-w88 {
      font-family: 'Arial', sans-serif;
      background-color: var(--page-w88-dark-bg);
      color: var(--page-w88-text-color);
      line-height: 1.6;
      padding-bottom: 80px; /* Cho khoảng trống cho nút nổi */
    }

    .page-w88-container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 15px;
    }

    .page-w88-section {
      padding: 40px 0;
      text-align: center;
    }
    .page-w88-section:nth-child(even) {
      background-color: var(--page-w88-darker-bg);
    }

    .page-w88-heading {
      color: var(--page-w88-primary-color);
      font-size: 2.2em;
      margin-bottom: 25px;
      position: relative;
      padding-bottom: 10px;
    }
    .page-w88-heading::after {
      content: '';
      position: absolute;
      left: 50%;
      bottom: 0;
      transform: translateX(-50%);
      width: 80px;
      height: 3px;
      background-color: var(--page-w88-accent-color);
    }

    .page-w88-subheading {
      color: var(--page-w88-secondary-color);
      font-size: 1.6em;
      margin-bottom: 20px;
    }

    .page-w88-paragraph {
      margin-bottom: 15px;
      font-size: 1.1em;
      color: var(--page-w88-text-color);
    }

    .page-w88-button {
      display: inline-block;
      background-color: var(--page-w88-primary-color);
      color: var(--page-w88-dark-bg);
      padding: 12px 25px;
      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;
    }
    .page-w88-button:hover {
      background-color: #ffd700; /* Vàng sáng hơn */
      transform: translateY(-2px);
    }

    /* Banner chính */
    .page-w88-hero {
      position: relative;
      height: 300px; /* Chiều cao cố định cho di động */
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      text-align: center;
      overflow: hidden;
      background-color: #000; /* Đảm bảo nền đen nếu ảnh không tải */
    }
    .page-w88-hero-image {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      z-index: 1;
      filter: brightness(0.6); /* Làm mờ ảnh để chữ nổi bật hơn */
    }
    .page-w88-hero-content {
      position: relative;
      z-index: 2;
      color: var(--page-w88-secondary-color);
      padding: 20px;
    }
    .page-w88-hero-title {
      font-size: 2.5em;
      margin-bottom: 10px;
      color: var(--page-w88-primary-color);
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
    }
    .page-w88-hero-description {
      font-size: 1.2em;
      max-width: 80%;
      margin: 0 auto 20px;
      text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.7);
    }

    /* Nút nổi đăng ký/đăng nhập */
    .page-w88-floating-buttons {
      position: fixed;
      bottom: 20px;
      left: 50%;
      transform: translateX(-50%);
      display: flex;
      gap: 15px;
      z-index: 1000;
      width: 90%;
      max-width: 380px; /* Giới hạn chiều rộng cho di động */
      justify-content: center;
    }
    .page-w88-floating-buttons .page-w88-button {
      flex: 1;
      padding: 15px 10px;
      font-size: 1em;
      text-align: center;
      white-space: nowrap; /* Ngăn chữ xuống dòng */
    }
    .page-w88-button-register {
      background-color: var(--page-w88-accent-color);
      color: var(--page-w88-secondary-color);
    }
    .page-w88-button-register:hover {
      background-color: #ff5252;
    }
    .page-w88-button-login {
      background-color: var(--page-w88-primary-color);
      color: var(--page-w88-dark-bg);
    }
    .page-w88-button-login:hover {
      background-color: #ffd700;
    }

    /* Sản phẩm/Danh mục trò chơi */
    .page-w88-product-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
      gap: 20px;
      margin-top: 30px;
    }
    .page-w88-product-card {
      background-color: var(--page-w88-darker-bg);
      border-radius: 10px;
      overflow: hidden;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      display: flex;
      flex-direction: column;
      text-align: center;
    }
    .page-w88-product-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 8px 20px rgba(0, 0, 0, 0.5);
    }
    .page-w88-product-card-link {
      text-decoration: none;
      color: inherit;
      display: block;
      height: 100%;
    }
    .page-w88-product-image {
      width: 100%;
      height: 120px; /* Chiều cao cố định cho ảnh sản phẩm */
      object-fit: cover;
      border-bottom: 2px solid var(--page-w88-primary-color);
    }
    .page-w88-product-title {
      font-size: 1.2em;
      color: var(--page-w88-secondary-color);
      padding: 15px 10px;
      background-color: #2a2a2a;
      flex-grow: 1; /* Đảm bảo tiêu đề chiếm hết không gian */
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .page-w88-product-title a {
      color: inherit;
      text-decoration: none;
    }
    .page-w88-product-title a:hover {
      color: var(--page-w88-primary-color);
    }

    /* Danh sách ưu đãi và lợi ích */
    .page-w88-list {
      list-style: none;
      padding: 0;
      margin-top: 30px;
      display: grid;
      grid-template-columns: 1fr;
      gap: 15px;
      text-align: left;
    }
    .page-w88-list-item {
      background-color: #2a2a2a;
      padding: 20px;
      border-radius: 8px;
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
      display: flex;
      align-items: flex-start;
      gap: 15px;
      color: var(--page-w88-text-color);
    }
    .page-w88-list-item::before {
      content: '✔'; /* Biểu tượng dấu tích */
      color: var(--page-w88-primary-color);
      font-size: 1.4em;
      line-height: 1;
      flex-shrink: 0;
    }
    .page-w88-list-item strong {
      color: var(--page-w88-secondary-color);
    }

    /* Hướng dẫn */
    .page-w88-guide-step {
      background-color: #2a2a2a;
      margin-bottom: 20px;
      padding: 25px;
      border-radius: 10px;
      text-align: left;
    }
    .page-w88-guide-step h3 {
      color: var(--page-w88-primary-color);
      font-size: 1.4em;
      margin-top: 0;
      margin-bottom: 10px;
    }
    .page-w88-guide-step p {
      color: var(--page-w88-text-color);
    }
    .page-w88-guide-step a {
      color: var(--page-w88-primary-color);
      text-decoration: none;
      font-weight: bold;
    }
    .page-w88-guide-step a:hover {
      text-decoration: underline;
    }

    /* FAQ */
    .page-w88-faq-item {
      margin-bottom: 15px;
      text-align: left;
    }
    .page-w88-faq-question {
      background-color: #2a2a2a;
      color: var(--page-w88-secondary-color);
      padding: 15px 20px;
      border-radius: 8px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: bold;
      transition: background-color 0.3s ease;
    }
    .page-w88-faq-question:hover {
      background-color: #3a3a3a;
    }
    .page-w88-faq-question::after {
      content: '+';
      font-size: 1.5em;
      transition: transform 0.3s ease;
    }
    .page-w88-faq-question.active::after {
      content: '-';
      transform: rotate(180deg);
    }
    .page-w88-faq-answer {
      background-color: #1f1f1f;
      padding: 15px 20px;
      border-radius: 0 0 8px 8px;
      color: var(--page-w88-text-color);
      display: none;
      overflow: hidden;
      transition: max-height 0.3s ease-out;
      max-height: 0;
    }
    .page-w88-faq-answer.open {
      display: block;
      max-height: 200px; /* Giới hạn chiều cao để có hiệu ứng trượt */
    }

    /* Call to Action cuối trang */
    .page-w88-cta-section {
      background-color: var(--page-w88-accent-color);
      padding: 50px 20px;
      color: var(--page-w88-secondary-color);
      text-align: center;
      border-radius: 10px;
      margin-top: 40px;
    }
    .page-w88-cta-section .page-w88-heading {
      color: var(--page-w88-secondary-color);
      margin-bottom: 20px;
    }
    .page-w88-cta-section .page-w88-heading::after {
      background-color: var(--page-w88-primary-color);
    }
    .page-w88-cta-section .page-w88-paragraph {
      color: var(--page-w88-secondary-color);
      margin-bottom: 30px;
    }
    .page-w88-cta-section .page-w88-button {
      background-color: var(--page-w88-primary-color);
      color: var(--page-w88-dark-bg);
      padding: 15px 35px;
      font-size: 1.2em;
    }
    .page-w88-cta-section .page-w88-button:hover {
      background-color: #ffd700;
    }

    /* Responsive */
    @media (min-width: 768px) {
      .page-w88-hero {
        height: 400px;
      }
      .page-w88-hero-title {
        font-size: 3.5em;
      }
      .page-w88-hero-description {
        font-size: 1.4em;
      }
      .page-w88-heading {
        font-size: 2.8em;
      }
      .page-w88-subheading {
        font-size: 1.8em;
      }
      .page-w88-product-grid {
        grid-template-columns: repeat(3, 1fr);
      }
      .page-w88-list {
        grid-template-columns: repeat(2, 1fr);
      }
      .page-w88-floating-buttons {
        max-width: 450px;
        bottom: 30px;
        gap: 20px;
      }
      .page-w88-floating-buttons .page-w88-button {
        font-size: 1.1em;
        padding: 15px 20px;
      }
    }

    @media (min-width: 1024px) {
      .page-w88-hero {
        height: 500px;
      }
      .page-w88-hero-title {
        font-size: 4em;
      }
      .page-w88-hero-description {
        font-size: 1.5em;
      }
      .page-w88-product-grid {
        grid-template-columns: repeat(4, 1fr);
      }
      .page-w88-list {
        grid-template-columns: repeat(3, 1fr);
      }
    }