/* CSS cho trang 13win 20 */
    .page-13win20 {
      font-family: 'Helvetica Neue', Arial, sans-serif;
      color: #333;
      line-height: 1.6;
      background-color: #f4f7f6;
      padding-bottom: 80px; /* Khoảng trống cho nút nổi */
    }

    .page-13win20__container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 20px;
    }

    .page-13win20__hero-section {
      position: relative;
      background-color: #2a3a52;
      color: #fff;
      text-align: center;
      padding: 10px 20px 60px 20px; /* Padding-top 10px để tránh header cố định */
      overflow: hidden;
      border-radius: 0 0 15px 15px;
      margin-bottom: 30px;
    }

    .page-13win20__hero-background {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      opacity: 0.3;
      z-index: 0;
    }

    .page-13win20__hero-content {
      position: relative;
      z-index: 1;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      min-height: 250px;
    }

    .page-13win20__hero-title {
      font-size: 2.5em;
      margin-bottom: 10px;
      line-height: 1.2;
      font-weight: bold;
      color: #ffcc00;
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    }

    .page-13win20__hero-subtitle {
      font-size: 1.1em;
      margin-bottom: 25px;
      max-width: 600px;
      color: #e0e0e0;
    }

    .page-13win20__cta-button {
      display: inline-block;
      background-color: #ffcc00;
      color: #2a3a52;
      padding: 15px 30px;
      border-radius: 50px;
      text-decoration: none;
      font-weight: bold;
      font-size: 1.1em;
      transition: background-color 0.3s ease, transform 0.2s ease;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
      border: none;
      cursor: pointer;
    }

    .page-13win20__cta-button:hover {
      background-color: #e6b800;
      transform: translateY(-2px);
    }

    .page-13win20__section {
      background-color: #ffffff;
      padding: 30px 20px;
      margin-bottom: 25px;
      border-radius: 10px;
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    }

    .page-13win20__section-title {
      font-size: 2em;
      color: #2a3a52;
      text-align: center;
      margin-bottom: 25px;
      font-weight: bold;
      position: relative;
    }

    .page-13win20__section-title::after {
      content: '';
      display: block;
      width: 60px;
      height: 4px;
      background-color: #ffcc00;
      margin: 10px auto 0;
      border-radius: 2px;
    }

    .page-13win20__text-content {
      font-size: 1em;
      color: #555;
      margin-bottom: 15px;
    }

    .page-13win20__game-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
      gap: 20px;
      margin-top: 20px;
    }

    .page-13win20__game-item {
      text-align: center;
      background-color: #f9f9f9;
      padding: 15px;
      border-radius: 8px;
      box-shadow: 0 1px 5px rgba(0, 0, 0, 0.08);
      transition: transform 0.2s ease, box-shadow 0.2s ease;
    }

    .page-13win20__game-item:hover {
      transform: translateY(-5px);
      box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    }

    .page-13win20__game-image {
      width: 100%;
      max-width: 250px; /* Đảm bảo ảnh không quá nhỏ */
      height: auto;
      border-radius: 5px;
      margin-bottom: 10px;
      display: block;
      margin-left: auto;
      margin-right: auto;
      max-height: 150px;
      object-fit: cover;
    }

    .page-13win20__game-title {
      font-size: 1.1em;
      color: #2a3a52;
      font-weight: bold;
      margin-bottom: 5px;
    }

    .page-13win20__game-description {
      font-size: 0.9em;
      color: #777;
    }

    .page-13win20__list {
      list-style: none;
      padding: 0;
      margin: 0;
    }

    .page-13win20__list-item {
      background-color: #f0f8ff;
      border-left: 5px solid #ffcc00;
      padding: 10px 15px;
      margin-bottom: 10px;
      border-radius: 5px;
      font-size: 1em;
      color: #333;
    }

    .page-13win20__list-item strong {
      color: #2a3a52;
    }

    .page-13win20__floating-button {
      position: fixed;
      bottom: 20px;
      left: 50%;
      transform: translateX(-50%);
      background-color: #e74c3c;
      color: #fff;
      padding: 15px 25px;
      border-radius: 50px;
      text-decoration: none;
      font-weight: bold;
      font-size: 1.2em;
      box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
      z-index: 1000;
      transition: background-color 0.3s ease, transform 0.2s ease;
      white-space: nowrap;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
    }

    .page-13win20__floating-button:hover {
      background-color: #c0392b;
      transform: translateX(-50%) translateY(-3px);
    }

    .page-13win20__faq-section {
      margin-top: 30px;
    }

    .page-13win20__faq-item {
      background-color: #f0f0f0;
      border-radius: 8px;
      margin-bottom: 15px;
      overflow: hidden;
      box-shadow: 0 1px 5px rgba(0, 0, 0, 0.05);
    }

    .page-13win20__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 15px 20px;
      background-color: #ffcc00;
      color: #2a3a52;
      cursor: pointer;
      font-weight: bold;
      font-size: 1.1em;
      user-select: none;
      transition: background-color 0.3s ease;
    }

    .page-13win20__faq-question:hover {
      background-color: #e6b800;
    }

    .page-13win20__faq-question h3 {
      margin: 0;
      font-size: 1em; /* Giữ kích thước phù hợp với flex item */
      color: #2a3a52;
      pointer-events: none; /* Ngăn chặn h3 chặn sự kiện click */
    }

    .page-13win20__faq-toggle {
      font-size: 1.5em;
      line-height: 1;
      margin-left: 10px;
      pointer-events: none; /* Ngăn chặn toggle chặn sự kiện click */
    }

    .page-13win20__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 20px;
      background-color: #ffffff;
      transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
      opacity: 0;
      color: #555;
    }

    .page-13win20__faq-item.active .page-13win20__faq-answer {
      max-height: 2000px !important; /* Đảm bảo đủ cao cho mọi nội dung */
      padding: 20px 20px !important;
      opacity: 1;
    }

    .page-13win20__faq-item.active .page-13win20__faq-toggle {
      content: '−';
    }

    @media (max-width: 768px) {
      .page-13win20__hero-section {
        padding-top: 10px; /* Điều chỉnh cho mobile */
        padding-bottom: 40px;
      }

      .page-13win20__hero-title {
        font-size: 1.8em;
      }

      .page-13win20__hero-subtitle {
        font-size: 1em;
      }

      .page-13win20__section-title {
        font-size: 1.6em;
      }

      .page-13win20__game-grid {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
        gap: 15px;
      }

      .page-13win20__game-image {
        max-width: 180px;
      }

      .page-13win20__floating-button {
        padding: 12px 20px;
        font-size: 1em;
        bottom: 15px;
      }

      .page-13win20__container {
        padding: 15px;
      }

      .page-13win20__faq-question {
        padding: 12px 15px;
        font-size: 1em;
      }

      .page-13win20__faq-answer {
        padding: 0 15px;
      }

      .page-13win20__faq-item.active .page-13win20__faq-answer {
        padding: 15px 15px !important;
      }
    }

    /* Đảm bảo hình ảnh responsive */
    .page-13win20 img {
      max-width: 100%;
      height: auto;
      box-sizing: border-box;
    }

    .page-13win20__image-wrapper {
      width: 100%;
      max-width: 100%;
      overflow: hidden;
      box-sizing: border-box;
    }

    @media (max-width: 768px) {
      .page-13win20 img {
        max-width: 100% !important;
        height: auto !important;
      }
      .page-13win20__image-wrapper {
        width: 100% !important;
        max-width: 100% !important;
        overflow: hidden !important;
        box-sizing: border-box !important;
      }
    }