:root {
      --page-88online-bg-color: #1a1a1a;
      --page-88online-primary-color: #FFD700; /* Vàng */
      --page-88online-secondary-color: #FFFFFF; /* Trắng */
      --page-88online-text-color: #E0E0E0; /* Xám nhạt cho văn bản */
      --page-88online-dark-text-color: #333333; /* Màu tối cho văn bản trên nền sáng */
      --page-88online-accent-color: #FF4500; /* Cam đỏ */
    }

    .page-88online {
      background-color: var(--page-88online-bg-color);
      color: var(--page-88online-text-color);
      font-family: 'Arial', sans-serif;
      line-height: 1.6;
      overflow-x: hidden;
    }

    .page-88online__container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 20px;
      box-sizing: border-box;
    }

    /* Tiêu đề */
    .page-88online h1, .page-88online h2, .page-88online h3, .page-88online h4 {
      color: var(--page-88online-primary-color);
      text-align: center;
      margin-bottom: 25px;
      line-height: 1.2;
    }

    .page-88online h1 {
      font-size: 2.8em;
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
    }

    .page-88online h2 {
      font-size: 2.2em;
      margin-top: 40px;
      border-bottom: 2px solid var(--page-88online-primary-color);
      padding-bottom: 10px;
      display: inline-block;
      width: auto;
      max-width: 100%;
    }

    .page-88online h3 {
      font-size: 1.8em;
      color: var(--page-88online-secondary-color);
    }

    /* Đoạn văn */
    .page-88online p {
      margin-bottom: 20px;
      font-size: 1.1em;
      color: var(--page-88online-text-color);
    }

    /* Nút */
    .page-88online__button {
      display: inline-block;
      background-color: var(--page-88online-primary-color);
      color: var(--page-88online-dark-text-color);
      padding: 15px 30px;
      border-radius: 8px;
      text-decoration: none;
      font-weight: bold;
      font-size: 1.2em;
      transition: background-color 0.3s ease, transform 0.3s ease;
      border: none;
      cursor: pointer;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
      text-align: center;
    }

    .page-88online__button:hover {
      background-color: var(--page-88online-secondary-color);
      transform: translateY(-3px);
      color: var(--page-88online-dark-text-color);
    }

    /* Hình ảnh */
    .page-88online img {
      max-width: 100%;
      height: auto;
      display: block;
      margin: 0 auto;
      border-radius: 8px;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.5);
    }
    .page-88online__image-wrapper {
      width: 100%;
      max-width: 100%;
      overflow: hidden;
      box-sizing: border-box;
      margin-bottom: 20px;
    }

    /* Hero Section */
    .page-88online__hero-section {
      text-align: center;
      padding: 10px 20px 50px; /* Padding top để tránh header */
      position: relative;
      overflow: hidden;
      background-color: #000;
    }

    .page-88online__hero-image {
      width: 100%;
      max-width: 100%;
      height: auto;
      object-fit: cover;
      border-radius: 0;
      box-shadow: none;
      margin-bottom: 20px;
    }

    .page-88online__hero-content {
      position: relative;
      z-index: 1;
      padding: 20px;
      margin-top: -30px; /* Di chuyển nội dung lên trên hình ảnh một chút */
    }

    .page-88online__hero-title {
      color: var(--page-88online-primary-color);
      margin-bottom: 20px;
      font-size: 3em;
      text-shadow: 3px 3px 6px rgba(0, 0, 0, 0.8);
    }

    .page-88online__hero-description {
      font-size: 1.3em;
      color: var(--page-88online-secondary-color);
      margin-bottom: 30px;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
    }

    /* Nút Đăng nhập nổi */
    .page-88online__floating-button {
      position: fixed;
      bottom: 20px;
      right: 20px;
      z-index: 1000;
      background-color: var(--page-88online-accent-color);
      color: var(--page-88online-secondary-color);
      padding: 15px 25px;
      border-radius: 50px;
      text-decoration: none;
      font-weight: bold;
      font-size: 1.1em;
      box-shadow: 0 5px 20px rgba(0, 0, 0, 0.4);
      animation: page-88online-pulse 1.5s infinite;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .page-88online__floating-button:hover {
      background-color: #e03c00;
      transform: scale(1.05);
    }
    
    @keyframes page-88online-pulse {
      0% { transform: scale(1); }
      50% { transform: scale(1.03); }
      100% { transform: scale(1); }
    }

    /* Phần Giới thiệu */
    .page-88online__about-section {
      padding: 50px 0;
      text-align: center;
    }

    /* Phần Loại trò chơi */
    .page-88online__game-categories {
      padding: 50px 0;
      text-align: center;
    }

    .page-88online__game-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: 30px;
      margin-top: 40px;
    }

    .page-88online__game-item {
      background-color: #2a2a2a;
      border-radius: 12px;
      overflow: hidden;
      box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      padding-bottom: 15px;
    }

    .page-88online__game-item:hover {
      transform: translateY(-8px);
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
    }

    .page-88online__game-item img {
      width: 100%;
      height: 200px;
      object-fit: cover;
      border-radius: 12px 12px 0 0;
      margin-bottom: 15px;
    }

    .page-88online__game-item h3 {
      color: var(--page-88online-primary-color);
      font-size: 1.5em;
      margin-bottom: 10px;
      padding: 0 15px;
      text-align: center;
    }

    .page-88online__game-item p {
      font-size: 1em;
      color: var(--page-88online-text-color);
      padding: 0 15px;
      text-align: center;
    }

    /* Phần Ưu đãi */
    .page-88online__promotions-section {
      padding: 50px 0;
      background-color: #222;
      text-align: center;
    }

    .page-88online__promotion-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 30px;
      margin-top: 40px;
    }

    .page-88online__promotion-card {
      background-color: #2a2a2a;
      border-radius: 12px;
      padding: 25px;
      box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
      text-align: left;
      transition: transform 0.3s ease;
    }

    .page-88online__promotion-card:hover {
      transform: translateY(-5px);
    }

    .page-88online__promotion-card h3 {
      color: var(--page-88online-primary-color);
      margin-bottom: 15px;
      text-align: left;
    }

    .page-88online__promotion-card p {
      color: var(--page-88online-text-color);
      font-size: 1em;
      margin-bottom: 20px;
    }

    .page-88online__promotion-card .page-88online__button {
      width: 100%;
      padding: 12px 20px;
      font-size: 1em;
    }

    /* Nhà cung cấp trò chơi */
    .page-88online__providers-section {
      padding: 50px 0;
      text-align: center;
    }

    .page-88online__provider-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
      gap: 20px;
      margin-top: 40px;
    }

    .page-88online__provider-item {
      background-color: #2a2a2a;
      border-radius: 8px;
      padding: 15px;
      display: flex;
      justify-content: center;
      align-items: center;
      height: 100px;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
      transition: transform 0.3s ease;
    }

    .page-88online__provider-item:hover {
      transform: scale(1.05);
    }

    .page-88online__provider-item img {
      max-width: 90%;
      max-height: 70px;
      object-fit: contain;
      border-radius: 0;
      box-shadow: none;
    }

    /* Tại sao chọn 88 online */
    .page-88online__why-choose-section {
      padding: 50px 0;
      background-color: #222;
      text-align: center;
    }

    .page-88online__feature-list {
      list-style: none;
      padding: 0;
      margin-top: 40px;
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
    }

    .page-88online__feature-item {
      background-color: #2a2a2a;
      border-radius: 12px;
      padding: 25px;
      box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
      text-align: left;
      transition: transform 0.3s ease;
    }

    .page-88online__feature-item:hover {
      transform: translateY(-5px);
    }

    .page-88online__feature-item h3 {
      color: var(--page-88online-primary-color);
      margin-bottom: 15px;
      text-align: left;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .page-88online__feature-item h3::before {
      content: '✔';
      color: var(--page-88online-accent-color);
      font-size: 1.2em;
    }

    .page-88online__feature-item p {
      color: var(--page-88online-text-color);
      font-size: 1em;
    }

    /* FAQ Section */
    .page-88online__faq-section {
      padding: 50px 0;
      text-align: center;
    }

    .page-88online__faq-container {
      max-width: 800px;
      margin: 40px auto 0;
      text-align: left;
    }

    .page-88online__faq-item {
      background-color: #2a2a2a;
      margin-bottom: 15px;
      border-radius: 8px;
      overflow: hidden;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    }

    .page-88online__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 15px 20px;
      background-color: #333333;
      cursor: pointer;
      user-select: none;
      transition: background-color 0.3s ease;
    }

    .page-88online__faq-question:hover {
      background-color: #444444;
    }

    .page-88online__faq-question h3 {
      margin: 0;
      color: var(--page-88online-secondary-color);
      font-size: 1.2em;
      flex-grow: 1;
      text-align: left;
      pointer-events: none; /* Ngăn chặn h3 chặn sự kiện click */
    }

    .page-88online__faq-toggle {
      font-size: 1.8em;
      font-weight: bold;
      color: var(--page-88online-primary-color);
      margin-left: 15px;
      transition: transform 0.3s ease;
      pointer-events: none; /* Ngăn chặn toggle chặn sự kiện click */
    }

    .page-88online__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 20px;
      color: var(--page-88online-text-color);
      font-size: 1em;
      transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
      opacity: 0;
    }

    .page-88online__faq-item.active .page-88online__faq-answer {
      max-height: 2000px !important; /* Đủ lớn để chứa mọi nội dung */
      padding: 20px !important;
      opacity: 1;
    }

    .page-88online__faq-item.active .page-88online__faq-toggle {
      transform: rotate(45deg); /* Biến đổi dấu '+' thành 'x' hoặc '-' */
      color: var(--page-88online-accent-color);
    }

    /* Social Media Section */
    .page-88online__social-section {
      padding: 50px 0;
      background-color: #222;
      text-align: center;
    }

    .page-88online__social-grid {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 20px;
      margin-top: 40px;
    }

    .page-88online__social-item {
      background-color: #2a2a2a;
      border-radius: 8px;
      padding: 15px 25px;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
      display: flex;
      align-items: center;
      gap: 10px;
      text-decoration: none;
      color: var(--page-88online-secondary-color);
      font-weight: bold;
      transition: background-color 0.3s ease, transform 0.3s ease;
    }

    .page-88online__social-item:hover {
      background-color: var(--page-88online-primary-color);
      color: var(--page-88online-dark-text-color);
      transform: translateY(-3px);
    }

    .page-88online__social-item img {
      width: 40px;
      height: 40px;
      border-radius: 0;
      box-shadow: none;
      margin: 0;
    }

    /* Responsive */
    @media (max-width: 768px) {
      .page-88online__container {
        padding: 15px;
      }

      .page-88online h1 {
        font-size: 2.2em;
      }

      .page-88online h2 {
        font-size: 1.8em;
      }

      .page-88online h3 {
        font-size: 1.4em;
      }

      .page-88online p {
        font-size: 1em;
      }

      .page-88online__button {
        padding: 12px 20px;
        font-size: 1em;
      }

      .page-88online__hero-section {
        padding-top: 10px; /* An toàn cho di động */
      }
      .page-88online__hero-title {
        font-size: 2.5em;
      }
      .page-88online__hero-description {
        font-size: 1.1em;
      }

      .page-88online__floating-button {
        bottom: 15px;
        right: 15px;
        padding: 12px 20px;
        font-size: 0.95em;
      }

      .page-88online__game-grid,
      .page-88online__promotion-grid,
      .page-88online__provider-grid,
      .page-88online__feature-list {
        grid-template-columns: 1fr;
      }
      
      .page-88online__game-item img {
        height: 180px;
      }

      .page-88online__faq-question {
        padding: 12px 15px;
      }

      .page-88online__faq-question h3 {
        font-size: 1.1em;
      }

      .page-88online__faq-toggle {
        font-size: 1.5em;
      }

      .page-88online__faq-answer {
        padding: 0 15px;
      }

      .page-88online__faq-item.active .page-88online__faq-answer {
        padding: 15px !important;
      }

      .page-88online__social-item {
        width: calc(50% - 10px);
        justify-content: flex-start;
        padding: 10px 15px;
        font-size: 0.9em;
      }
      .page-88online__social-item img {
        width: 30px;
        height: 30px;
      }

      /* Image responsive important */
      .page-88online img {
        max-width: 100% !important;
        height: auto !important;
      }
      .page-88online__image-wrapper {
        width: 100% !important;
        max-width: 100% !important;
        overflow: hidden !important;
        box-sizing: border-box !important;
      }
    }

    @media (max-width: 480px) {
      .page-88online h1 {
        font-size: 1.8em;
      }
      .page-88online__hero-title {
        font-size: 2em;
      }
      .page-88online__hero-description {
        font-size: 1em;
      }
      .page-88online__floating-button {
        font-size: 0.85em;
        padding: 10px 18px;
      }
      .page-88online__social-item {
        width: 100%;
      }
    }