:root {
      --page-vn88-primary-color: #e44d26; /* Màu đỏ cam nổi bật */
      --page-vn88-secondary-color: #f0f0f0; /* Màu chữ sáng */
      --page-vn88-background-dark: #1a1a1a; /* Nền tối */
      --page-vn88-background-light: #2c2c2c; /* Nền tối hơn một chút cho các phần */
      --page-vn88-accent-color: #ffd700; /* Màu vàng kim cho điểm nhấn */
      --page-vn88-border-color: #444; /* Màu viền */
      --page-vn88-text-color: #f0f0f0; /* Màu chữ chính */
    }

    .page-vn88 {
      font-family: 'Arial', sans-serif;
      color: var(--page-vn88-text-color);
      background-color: var(--page-vn88-background-dark);
      line-height: 1.6;
      font-size: 16px;
    }

    /* Đảm bảo nội dung không bị che bởi header cố định */
    .page-vn88__hero-section,
    .page-vn88__section:first-of-type {
        padding-top: 120px; /* Khoảng cách cho header cố định trên desktop */
    }

    @media (max-width: 768px) {
        .page-vn88__hero-section,
        .page-vn88__section:first-of-type {
            padding-top: 100px; /* Khoảng cách cho header cố định trên mobile */
        }
    }

    .page-vn88__container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 20px;
    }

    @media (max-width: 768px) {
      .page-vn88__container {
        padding: 10px;
      }
    }

    .page-vn88__hero-section {
      text-align: center;
      padding-bottom: 40px;
      background-color: var(--page-vn88-background-light);
      position: relative;
    }

    .page-vn88__hero-image-wrapper {
      width: 100%;
      max-width: 100%;
      overflow: hidden;
      box-sizing: border-box;
      margin-bottom: 20px;
    }

    .page-vn88__hero-image {
      width: 100%;
      height: auto;
      display: block;
      object-fit: cover;
    }

    .page-vn88__hero-content {
      position: relative;
      z-index: 1;
      padding: 0 20px;
    }

    .page-vn88__hero-title {
      font-size: 2.8em;
      color: var(--page-vn88-accent-color);
      margin-bottom: 15px;
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
    }

    .page-vn88__hero-subtitle {
      font-size: 1.4em;
      color: var(--page-vn88-secondary-color);
      margin-bottom: 30px;
      text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.5);
    }

    .page-vn88__cta-button {
      display: inline-block;
      background-color: var(--page-vn88-primary-color);
      color: var(--page-vn88-secondary-color);
      padding: 15px 30px;
      border-radius: 8px;
      text-decoration: none;
      font-weight: bold;
      font-size: 1.2em;
      transition: background-color 0.3s ease, transform 0.2s ease;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4);
      border: none;
      cursor: pointer;
    }

    .page-vn88__cta-button:hover {
      background-color: #ff6a3d;
      transform: translateY(-2px);
    }

    .page-vn88__section {
      padding: 60px 0;
      text-align: center;
      background-color: var(--page-vn88-background-light);
      margin-bottom: 20px;
      border-radius: 10px;
      box-shadow: 0 0 15px rgba(0, 0, 0, 0.3);
    }

    .page-vn88__section--dark {
      background-color: var(--page-vn88-background-dark);
    }

    .page-vn88__section-title {
      font-size: 2.2em;
      color: var(--page-vn88-accent-color);
      margin-bottom: 30px;
      text-align: center;
    }

    .page-vn88__section-text {
      font-size: 1.1em;
      color: var(--page-vn88-text-color);
      margin-bottom: 20px;
      text-align: left;
    }

    .page-vn88__grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
      margin-top: 30px;
    }

    .page-vn88__card {
      background-color: var(--page-vn88-background-dark);
      border-radius: 10px;
      overflow: hidden;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.5);
      text-align: center;
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      display: flex;
      flex-direction: column;
      height: 100%;
    }

    .page-vn88__card:hover {
      transform: translateY(-5px);
      box-shadow: 0 8px 20px rgba(0, 0, 0, 0.7);
    }

    .page-vn88__card-image-wrapper {
      width: 100%;
      max-width: 100%;
      overflow: hidden;
      box-sizing: border-box;
      height: 200px; /* Chiều cao cố định cho hình ảnh thẻ */
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .page-vn88__card-image {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }

    .page-vn88__card-content {
      padding: 20px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .page-vn88__card-title {
      font-size: 1.5em;
      color: var(--page-vn88-primary-color);
      margin-bottom: 10px;
    }

    .page-vn88__card-text {
      font-size: 0.95em;
      color: var(--page-vn88-text-color);
      margin-bottom: 15px;
      flex-grow: 1;
    }

    .page-vn88__card-link {
      display: inline-block;
      background-color: var(--page-vn88-accent-color);
      color: var(--page-vn88-background-dark);
      padding: 10px 20px;
      border-radius: 5px;
      text-decoration: none;
      font-weight: bold;
      font-size: 1em;
      transition: background-color 0.3s ease;
    }

    .page-vn88__card-link:hover {
      background-color: #e6c200;
    }

    .page-vn88__logo-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
      gap: 20px;
      margin-top: 30px;
      align-items: center;
      justify-items: center;
    }

    .page-vn88__logo-item {
      width: 100%;
      max-width: 150px; /* Chiều rộng tối đa cho logo */
      height: auto;
      background-color: rgba(255, 255, 255, 0.05);
      border-radius: 8px;
      padding: 10px;
      box-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
      transition: transform 0.2s ease;
    }
    .page-vn88__logo-item:hover {
        transform: scale(1.05);
    }
    .page-vn88__logo-image {
        width: 100%;
        height: auto;
        display: block;
        object-fit: contain;
    }

    .page-vn88__payment-grid {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 20px;
      margin-top: 30px;
    }

    .page-vn88__payment-item {
      background-color: var(--page-vn88-background-dark);
      border-radius: 8px;
      padding: 15px 20px;
      box-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
      text-align: center;
      min-width: 120px;
      max-width: 150px;
      transition: transform 0.2s ease;
    }
    .page-vn88__payment-item:hover {
        transform: translateY(-3px);
    }

    .page-vn88__payment-image {
      width: 100%;
      height: auto;
      max-height: 50px;
      object-fit: contain;
      margin-bottom: 10px;
    }

    .page-vn88__payment-name {
      font-size: 0.9em;
      color: var(--page-vn88-secondary-color);
      font-weight: bold;
    }

    .page-vn88__how-to-list {
      list-style: none;
      padding: 0;
      margin-top: 30px;
      display: flex;
      flex-direction: column;
      gap: 25px;
      text-align: left;
    }

    .page-vn88__how-to-item {
      background-color: var(--page-vn88-background-dark);
      border-left: 5px solid var(--page-vn88-primary-color);
      padding: 20px 25px;
      border-radius: 8px;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
    }

    .page-vn88__how-to-title {
      font-size: 1.4em;
      color: var(--page-vn88-accent-color);
      margin-bottom: 10px;
    }

    .page-vn88__how-to-description {
      font-size: 1em;
      color: var(--page-vn88-text-color);
    }

    .page-vn88__advantages-list {
      list-style: none;
      padding: 0;
      margin-top: 30px;
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 20px;
      text-align: left;
    }

    .page-vn88__advantage-item {
      background-color: var(--page-vn88-background-dark);
      padding: 20px;
      border-radius: 8px;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
      border: 1px solid var(--page-vn88-border-color);
      display: flex;
      align-items: flex-start;
      gap: 15px;
    }

    .page-vn88__advantage-icon {
      color: var(--page-vn88-primary-color);
      font-size: 2em;
      line-height: 1;
    }

    .page-vn88__advantage-title {
      font-size: 1.3em;
      color: var(--page-vn88-accent-color);
      margin-bottom: 5px;
    }

    .page-vn88__advantage-description {
      font-size: 0.95em;
      color: var(--page-vn88-text-color);
    }

    .page-vn88__faq-list {
      margin-top: 30px;
      text-align: left;
    }

    .page-vn88__faq-item {
      background-color: var(--page-vn88-background-dark);
      border-radius: 8px;
      margin-bottom: 15px;
      overflow: hidden;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
    }

    .page-vn88__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 18px 25px;
      background-color: var(--page-vn88-background-light);
      color: var(--page-vn88-secondary-color);
      cursor: pointer;
      font-size: 1.1em;
      font-weight: bold;
      border-bottom: 1px solid var(--page-vn88-border-color);
      transition: background-color 0.3s ease;
    }

    .page-vn88__faq-question:hover {
      background-color: #3a3a3a;
    }

    .page-vn88__faq-question h3 {
        margin: 0;
        color: var(--page-vn88-secondary-color);
        font-size: 1.1em;
        pointer-events: none; /* Ngăn h3 chặn sự kiện click */
    }

    .page-vn88__faq-toggle {
      font-size: 1.5em;
      font-weight: bold;
      color: var(--page-vn88-primary-color);
      transition: transform 0.3s ease;
      pointer-events: none; /* Ngăn biểu tượng toggle chặn sự kiện click */
    }

    .page-vn88__faq-item.active .page-vn88__faq-toggle {
      transform: rotate(45deg); /* Thay đổi + thành X hoặc - */
      color: var(--page-vn88-accent-color);
    }
    .page-vn88__faq-item.active .page-vn88__faq-question {
        border-bottom: none;
    }

    .page-vn88__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 25px;
      background-color: var(--page-vn88-background-dark);
      color: var(--page-vn88-text-color);
      transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
      opacity: 0;
    }

    .page-vn88__faq-item.active .page-vn88__faq-answer {
      max-height: 2000px !important; /* Đủ lớn để chứa nội dung */
      padding: 20px 25px !important;
      opacity: 1;
    }

    .page-vn88__social-grid {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 20px;
      margin-top: 30px;
    }

    .page-vn88__social-link {
      display: flex;
      align-items: center;
      gap: 10px;
      background-color: var(--page-vn88-background-dark);
      color: var(--page-vn88-secondary-color);
      padding: 10px 20px;
      border-radius: 8px;
      text-decoration: none;
      font-weight: bold;
      transition: background-color 0.3s ease, transform 0.2s ease;
      box-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
    }

    .page-vn88__social-link:hover {
      background-color: #3a3a3a;
      transform: translateY(-2px);
    }

    .page-vn88__social-icon {
      width: 30px;
      height: 30px;
      object-fit: contain;
      filter: grayscale(0%); /* Đảm bảo không có bộ lọc màu */
    }

    .page-vn88__sticky-cta {
        position: sticky; /* Sử dụng sticky để nó cố định trong main khi cuộn */
        bottom: 20px;
        right: 20px;
        z-index: 100;
        text-align: center;
        padding: 10px 0;
        margin-top: 30px; /* Đảm bảo có khoảng cách với phần nội dung cuối */
    }

    /* Điều chỉnh Responsive */
    @media (max-width: 768px) {
      .page-vn88__hero-title {
        font-size: 2em;
      }

      .page-vn88__hero-subtitle {
        font-size: 1.1em;
      }

      .page-vn88__cta-button {
        padding: 12px 25px;
        font-size: 1.1em;
      }

      .page-vn88__section {
        padding: 40px 0;
      }

      .page-vn88__section-title {
        font-size: 1.8em;
      }

      .page-vn88__grid {
        grid-template-columns: 1fr;
      }

      .page-vn88__card-image-wrapper {
        height: 180px;
      }

      .page-vn88__logo-grid {
        grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
      }

      .page-vn88__logo-item {
        max-width: 120px;
      }

      .page-vn88__how-to-item,
      .page-vn88__advantage-item {
        padding: 15px 20px;
      }

      .page-vn88__how-to-title {
        font-size: 1.2em;
      }

      .page-vn88__faq-question {
        padding: 15px 20px;
        font-size: 1em;
      }

      .page-vn88__faq-question h3 {
        font-size: 1em;
      }

      .page-vn88__faq-answer {
        padding: 0 20px;
      }

      .page-vn88__faq-item.active .page-vn88__faq-answer {
        padding: 15px 20px !important;
      }

      .page-vn88__social-link {
        padding: 8px 15px;
        font-size: 0.9em;
      }

      /* Buộc hình ảnh phản hồi trên thiết bị di động */
      .page-vn88 img {
          max-width: 100% !important;
          height: auto !important;
          box-sizing: border-box !important;
      }
      .page-vn88__hero-image-wrapper,
      .page-vn88__card-image-wrapper,
      .page-vn88__logo-item,
      .page-vn88__payment-item {
          width: 100% !important;
          max-width: 100% !important;
          overflow: hidden !important;
          box-sizing: border-box !important;
      }

      .page-vn88__sticky-cta {
          position: fixed; /* Chuyển sang fixed trên mobile để luôn hiển thị */
          left: 0;
          right: 0;
          bottom: 0;
          background-color: rgba(26, 26, 26, 0.9);
          padding: 10px;
          border-top: 1px solid var(--page-vn88-border-color);
          margin-top: 0;
          box-shadow: 0 -4px 10px rgba(0, 0, 0, 0.5);
      }
    }