:root {
      --page-win-18-primary-color: #e44d26; /* Màu đỏ cam sống động */
      --page-win-18-secondary-color: #333;
      --page-win-18-accent-color: #ffd700; /* Màu vàng cho điểm nhấn */
      --page-win-18-background-dark: #1a1a1a;
      --page-win-18-background-light: #2c2c2c;
      --page-win-18-text-color-light: #f0f0f0;
      --page-win-18-text-color-dark: #cccccc;
      --page-win-18-border-color: #444;
      --page-win-18-spacing-sm: 10px;
      --page-win-18-spacing-md: 20px;
      --page-win-18-spacing-lg: 40px;
      --page-win-18-font-family: 'Arial', sans-serif;
    }

    .page-win-18 {
      font-family: var(--page-win-18-font-family);
      color: var(--page-win-18-text-color-light);
      background-color: var(--page-win-18-background-dark);
      line-height: 1.6;
      padding-bottom: 80px; /* Khoảng trống cho các nút nổi */
    }

    /* Khoảng cách cho thanh điều hướng cố định (giả định body đã có padding-top) */
    .page-win-18__hero-section {
      padding-top: var(--page-win-18-spacing-sm); /* Khoảng đệm trang trí nhỏ ở trên */
    }

    .page-win-18__section {
      padding: var(--page-win-18-spacing-lg) var(--page-win-18-spacing-md);
      margin: 0 auto;
      max-width: 1200px;
      text-align: center;
    }

    .page-win-18__section--dark {
      background-color: var(--page-win-18-background-light);
    }

    .page-win-18__h1, .page-win-18__h2, .page-win-18__h3 {
      color: var(--page-win-18-accent-color);
      margin-bottom: var(--page-win-18-spacing-md);
      text-transform: uppercase;
    }

    .page-win-18__h1 {
      font-size: 2.5em;
      margin-top: 0;
    }

    .page-win-18__h2 {
      font-size: 2em;
      margin-top: var(--page-win-18-spacing-lg);
    }

    .page-win-18__h3 {
      font-size: 1.5em;
    }

    .page-win-18__p {
      margin-bottom: var(--page-win-18-spacing-md);
      color: var(--page-win-18-text-color-dark);
    }

    .page-win-18__button {
      display: inline-block;
      background-color: var(--page-win-18-primary-color);
      color: #fff;
      padding: 12px 25px;
      border-radius: 5px;
      text-decoration: none;
      font-weight: bold;
      transition: background-color 0.3s ease;
      border: none;
      cursor: pointer;
      font-size: 1em;
      margin: var(--page-win-18-spacing-sm);
    }

    .page-win-18__button:hover {
      background-color: #ff6a3c;
    }

    .page-win-18__button--secondary {
      background-color: var(--page-win-18-secondary-color);
    }

    .page-win-18__button--secondary:hover {
      background-color: #555;
    }

    .page-win-18__hero-section {
      position: relative;
      overflow: hidden;
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      min-height: 500px;
      background-color: var(--page-win-18-background-dark);
      padding: var(--page-win-18-spacing-lg) var(--page-win-18-spacing-md);
    }

    .page-win-18__hero-background {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      z-index: 0;
      opacity: 0.4;
      max-width: 100%; /* Hình ảnh đáp ứng */
      height: auto; /* Hình ảnh đáp ứng */
    }

    .page-win-18__hero-content {
      position: relative;
      z-index: 1;
      text-align: center;
      padding: var(--page-win-18-spacing-md);
      max-width: 800px;
    }

    .page-win-18__hero-title {
      font-size: 3.5em;
      color: var(--page-win-18-accent-color);
      margin-bottom: var(--page-win-18-spacing-sm);
      line-height: 1.1;
    }

    .page-win-18__hero-subtitle {
      font-size: 1.5em;
      color: var(--page-win-18-text-color-light);
      margin-bottom: var(--page-win-18-spacing-lg);
    }

    .page-win-18__floating-buttons {
      position: fixed;
      bottom: var(--page-win-18-spacing-md);
      left: 50%;
      transform: translateX(-50%);
      z-index: 1000;
      display: flex;
      gap: var(--page-win-18-spacing-md);
      width: calc(100% - 2 * var(--page-win-18-spacing-md));
      max-width: 400px;
      justify-content: center;
    }

    .page-win-18__floating-button {
      flex: 1;
      text-align: center;
      padding: 15px 10px;
      font-size: 1.1em;
      border-radius: 8px;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    }

    .page-win-18__games-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: var(--page-win-18-spacing-md);
      margin-top: var(--page-win-18-spacing-lg);
    }

    .page-win-18__game-card {
      background-color: var(--page-win-18-background-light);
      border-radius: 8px;
      overflow: hidden;
      text-align: center;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
      transition: transform 0.3s ease;
      display: flex;
      flex-direction: column;
    }

    .page-win-18__game-card:hover {
      transform: translateY(-5px);
    }

    .page-win-18__game-image {
      width: 100%;
      height: 200px; /* Chiều cao cố định cho tính nhất quán */
      object-fit: cover;
      max-width: 100%; /* Hình ảnh đáp ứng */
    }

    .page-win-18__game-content {
      padding: var(--page-win-18-spacing-md);
      flex-grow: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .page-win-18__game-title {
      font-size: 1.2em;
      color: var(--page-win-18-accent-color);
      margin-bottom: var(--page-win-18-spacing-sm);
    }

    .page-win-18__game-description {
      font-size: 0.9em;
      color: var(--page-win-18-text-color-dark);
      margin-bottom: var(--page-win-18-spacing-md);
    }

    .page-win-18__promotion-item {
      background-color: var(--page-win-18-background-light);
      border-left: 5px solid var(--page-win-18-primary-color);
      padding: var(--page-win-18-spacing-md);
      margin-bottom: var(--page-win-18-spacing-md);
      border-radius: 8px;
      text-align: left;
    }

    .page-win-18__promotion-title {
      color: var(--page-win-18-accent-color);
      margin-top: 0;
    }

    .page-win-18__promotion-description {
      color: var(--page-win-18-text-color-dark);
    }

    .page-win-18__features-list {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: var(--page-win-18-spacing-md);
      margin-top: var(--page-win-18-spacing-lg);
      list-style: none;
      padding: 0;
    }

    .page-win-18__feature-item {
      background-color: var(--page-win-18-background-light);
      padding: var(--page-win-18-spacing-md);
      border-radius: 8px;
      text-align: left;
      display: flex;
      align-items: flex-start;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
      box-sizing: border-box; /* Bắt buộc cho các mục danh sách */
    }

    .page-win-18__feature-icon {
      flex-shrink: 0;
      width: 60px; /* CSS display size, actual image from GALLERY will be larger (e.g., 200x200) */
      height: 60px;
      margin-right: var(--page-win-18-spacing-sm);
      object-fit: contain;
      max-width: 100%; /* Hình ảnh đáp ứng */
      height: auto; /* Hình ảnh đáp ứng */
    }

    .page-win-18__feature-text h3 {
      color: var(--page-win-18-primary-color);
      margin-top: 0;
      margin-bottom: 5px;
    }

    .page-win-18__feature-text p {
      color: var(--page-win-18-text-color-dark);
      font-size: 0.9em;
      margin-bottom: 0;
    }

    .page-win-18__faq-container {
      margin-top: var(--page-win-18-spacing-lg);
      text-align: left;
    }

    .page-win-18__faq-item {
      background-color: var(--page-win-18-background-light);
      border-radius: 8px;
      margin-bottom: var(--page-win-18-spacing-sm);
      overflow: hidden;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    }

    .page-win-18__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: var(--page-win-18-spacing-md);
      background-color: var(--page-win-18-secondary-color);
      cursor: pointer;
      user-select: none;
      transition: background-color 0.3s ease;
    }

    .page-win-18__faq-question:hover {
      background-color: #555;
    }

    .page-win-18__faq-question h3 {
      color: var(--page-win-18-accent-color);
      margin: 0;
      pointer-events: none; /* Ngăn h3 chặn sự kiện click */
    }

    .page-win-18__faq-toggle {
      font-size: 1.5em;
      font-weight: bold;
      color: var(--page-win-18-primary-color);
      transition: transform 0.3s ease;
      pointer-events: none; /* Ngăn nút chuyển đổi chặn sự kiện click */
    }

    .page-win-18__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 var(--page-win-18-spacing-md);
      opacity: 0;
      transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
      color: var(--page-win-18-text-color-dark);
    }

    .page-win-18__faq-item.active .page-win-18__faq-answer {
      max-height: 2000px !important; /* Giá trị đủ lớn để chứa mọi nội dung */
      padding: var(--page-win-18-spacing-md) var(--page-win-18-spacing-md) !important;
      opacity: 1;
    }

    .page-win-18__faq-item.active .page-win-18__faq-toggle {
      transform: rotate(45deg); /* Thay đổi + thành hình dấu trừ */
    }

    /* Thiết kế đáp ứng */
    @media (max-width: 768px) {
      .page-win-18__h1 {
        font-size: 2em;
      }

      .page-win-18__hero-title {
        font-size: 2.5em;
      }

      .page-win-18__hero-subtitle {
        font-size: 1.2em;
      }

      .page-win-18__floating-buttons {
        bottom: var(--page-win-18-spacing-sm);
        gap: var(--page-win-18-spacing-sm);
        width: calc(100% - 2 * var(--page-win-18-spacing-sm));
      }

      .page-win-18__floating-button {
        padding: 12px 8px;
        font-size: 1em;
      }

      .page-win-18__section {
        padding: var(--page-win-18-spacing-md) var(--page-win-18-spacing-sm);
      }

      .page-win-18__games-grid,
      .page-win-18__features-list {
        grid-template-columns: 1fr;
      }

      .page-win-18__feature-item {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
        padding: var(--page-win-18-spacing-sm); /* Điều chỉnh padding cho di động */
        word-wrap: break-word !important;
        overflow-wrap: break-word !important;
        word-break: break-word !important;
      }

      .page-win-18__feature-item .page-win-18__feature-text h3 {
        font-size: 1.1em;
      }
      .page-win-18__feature-item .page-win-18__feature-text p {
        font-size: 0.85em;
      }

      .page-win-18__feature-icon {
        width: 50px;
        height: 50px;
      }

      /* Hình ảnh đáp ứng cho di động */
      .page-win-18__hero-background,
      .page-win-18__game-image,
      .page-win-18__feature-icon,
      .page-win-18 img {
        max-width: 100% !important;
        height: auto !important;
        box-sizing: border-box !important;
      }
      .page-win-18__game-card {
          width: 100% !important;
          max-width: 100% !important;
          box-sizing: border-box !important;
          margin-left: 0 !important;
          margin-right: 0 !important;
      }
      .page-win-18__games-grid, .page-win-18__features-list {
          width: 100% !important;
          max-width: 100% !important;
          box-sizing: border-box !important;
          padding: 0 !important;
          margin-left: 0 !important;
          margin-right: 0 !important;
      }
    }