:root {
      --win18-primary-color: #e0b000; /* Vàng kim */
      --win18-secondary-color: #2a2a2a; /* Xám đậm */
      --win18-accent-color: #007bff; /* Xanh dương cho nút */
      --win18-text-light: #f0f0f0;
      --win18-text-dark: #333;
      --win18-bg-dark: #1a1a1a;
      --win18-bg-light-gray: #252525;
      --win18-border-color: #444;
      --win18-success-color: #28a745; /* Xanh lá cho đăng ký */
    }

    body {
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
      line-height: 1.6;
      color: var(--win18-text-light);
      background-color: var(--win18-bg-dark);
      margin: 0;
      padding: 0;
      overflow-x: hidden;
    }

    .page-win18-login {
      max-width: 1200px;
      margin: 0 auto;
      padding: var(--header-offset, 122px) 15px 0; /* Fallback cho offset header */
      box-sizing: border-box;
    }

    .page-win18-login__section {
      padding: 40px 0;
      margin-bottom: 20px;
      border-radius: 8px;
    }

    .page-win18-login__section--dark {
      background-color: var(--win18-bg-light-gray);
      padding: 50px 20px;
      border-radius: 8px;
    }

    .page-win18-login__title {
      color: var(--win18-primary-color);
      text-align: center;
      margin-bottom: 30px;
      font-size: 2.5em;
      font-weight: bold;
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    }

    .page-win18-login__subtitle {
      color: var(--win18-text-light);
      text-align: center;
      margin-bottom: 40px;
      font-size: 1.2em;
    }

    .page-win18-login__button-group {
      display: flex;
      justify-content: center;
      gap: 20px;
      margin-top: 30px;
    }

    .page-win18-login__button {
      background-color: var(--win18-primary-color);
      color: var(--win18-text-dark);
      padding: 12px 25px;
      border-radius: 5px;
      font-weight: bold;
      text-decoration: none;
      transition: background-color 0.3s ease, transform 0.2s ease;
      border: none;
      cursor: pointer;
      font-size: 1em;
    }

    .page-win18-login__button--secondary {
      background-color: var(--win18-accent-color);
      color: var(--win18-text-light);
    }

    .page-win18-login__button:hover {
      background-color: #c29a00; /* Màu vàng đậm hơn */
      transform: translateY(-2px);
    }

    .page-win18-login__button--secondary:hover {
      background-color: #0056b3; /* Màu xanh đậm hơn */
      transform: translateY(-2px);
    }

    /* Nút Đăng Nhập/Đăng Ký Nổi */
    .page-win18-login__floating-buttons {
      position: fixed;
      bottom: 20px;
      left: 50%;
      transform: translateX(-50%);
      display: flex;
      gap: 15px;
      z-index: 1000;
      width: 90%;
      max-width: 350px;
      box-sizing: border-box;
      padding: 0 10px;
    }

    .page-win18-login__floating-button {
      flex: 1;
      padding: 12px 0;
      text-align: center;
      font-size: 1.1em;
      font-weight: bold;
      border-radius: 30px;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
      transition: background-color 0.3s ease, transform 0.2s ease;
      border: none;
      cursor: pointer;
      text-decoration: none; /* Đảm bảo không có gạch chân cho thẻ a */
    }

    .page-win18-login__floating-button--register {
      background-color: var(--win18-success-color); /* Màu xanh lá cho đăng ký */
      color: #fff;
    }

    .page-win18-login__floating-button--login {
      background-color: var(--win18-primary-color); /* Màu vàng cho đăng nhập */
      color: var(--win18-text-dark);
    }

    .page-win18-login__floating-button--register:hover {
      background-color: #218838; /* Màu xanh lá đậm hơn */
      transform: translateY(-2px);
    }

    .page-win18-login__floating-button--login:hover {
      background-color: #c29a00; /* Màu vàng đậm hơn */
      transform: translateY(-2px);
    }

    /* Phần Hero */
    .page-win18-login__hero-section {
      position: relative;
      overflow: hidden;
      border-radius: 10px;
      margin-bottom: 40px;
      padding-top: 10px; /* Padding nhỏ ở trên, body xử lý offset header */
    }

    .page-win18-login__hero-image-wrapper {
      width: 100%;
      max-width: 100%;
      overflow: hidden;
      box-sizing: border-box;
    }

    .page-win18-login__hero-image {
      width: 100%;
      height: auto;
      display: block;
      border-radius: 8px;
    }

    .page-win18-login__hero-content {
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      text-align: center;
      color: #fff;
      z-index: 10;
      width: 90%;
      max-width: 800px;
      background-color: rgba(0, 0, 0, 0.6);
      padding: 20px;
      border-radius: 10px;
    }

    .page-win18-login__hero-heading {
      font-size: 2.8em;
      margin-bottom: 10px;
      color: var(--win18-primary-color);
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
    }

    .page-win18-login__hero-text {
      font-size: 1.2em;
      margin-bottom: 20px;
      color: var(--win18-text-light);
    }

    /* Danh Mục Trò Chơi */
    .page-win18-login__game-categories {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 25px;
      margin-top: 40px;
      padding: 0 15px;
    }

    .page-win18-login__category-card {
      background-color: var(--win18-bg-light-gray);
      border-radius: 10px;
      overflow: hidden;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      display: flex;
      flex-direction: column;
      align-items: center;
      padding-bottom: 20px;
      box-sizing: border-box;
    }

    .page-win18-login__category-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 6px 20px rgba(0, 0, 0, 0.6);
    }

    .page-win18-login__category-image-wrapper {
      width: 100%;
      max-width: 100%;
      overflow: hidden;
      box-sizing: border-box;
      height: 200px; /* Chiều cao cố định để nhất quán */
    }

    .page-win18-login__category-image {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }

    .page-win18-login__category-title {
      font-size: 1.5em;
      color: var(--win18-primary-color);
      margin: 20px 0 10px;
      text-align: center;
      padding: 0 15px;
    }

    .page-win18-login__category-description {
      font-size: 0.95em;
      color: var(--win18-text-light);
      text-align: center;
      padding: 0 20px;
    }

    /* Phần Khuyến Mãi */
    .page-win18-login__promotions-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 25px;
      padding: 0 15px;
    }

    .page-win18-login__promo-card {
      background-color: var(--win18-bg-dark);
      border: 1px solid var(--win18-primary-color);
      border-radius: 10px;
      padding: 25px;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
      text-align: center;
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      box-sizing: border-box;
    }

    .page-win18-login__promo-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 6px 18px rgba(0, 0, 0, 0.5);
    }

    .page-win18-login__promo-title {
      color: var(--win18-primary-color);
      font-size: 1.8em;
      margin-bottom: 15px;
    }

    .page-win18-login__promo-description {
      color: var(--win18-text-light);
      font-size: 1em;
      margin-bottom: 20px;
    }

    /* Lý Do Chọn Win18 */
    .page-win18-login__why-list {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 20px;
      list-style: none;
      padding: 0 15px;
      margin: 0;
    }

    .page-win18-login__why-item {
      background-color: var(--win18-bg-light-gray);
      padding: 25px;
      border-radius: 8px;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
      text-align: center;
      box-sizing: border-box;
    }

    .page-win18-login__why-item-title {
      color: var(--win18-primary-color);
      font-size: 1.4em;
      margin-bottom: 10px;
    }

    .page-win18-login__why-item-text {
      color: var(--win18-text-light);
      font-size: 0.95em;
    }

    /* Phần Câu Hỏi Thường Gặp (FAQ) */
    .page-win18-login__faq-section {
      padding: 50px 0;
      background-color: var(--win18-bg-light-gray);
      border-radius: 8px;
      margin-bottom: 40px;
    }

    .page-win18-login__faq-list {
      max-width: 800px;
      margin: 0 auto;
      padding: 0 15px;
    }

    .page-win18-login__faq-item {
      background-color: var(--win18-bg-dark);
      border: 1px solid var(--win18-border-color);
      border-radius: 8px;
      margin-bottom: 15px;
      overflow: hidden;
      box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
    }

    .page-win18-login__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 20px 25px;
      cursor: pointer;
      user-select: none;
      color: var(--win18-primary-color);
      font-size: 1.2em;
      font-weight: bold;
      transition: background-color 0.3s ease;
    }

    .page-win18-login__faq-question:hover {
      background-color: rgba(var(--win18-primary-color), 0.1);
    }

    .page-win18-login__faq-question h3 {
      margin: 0;
      color: inherit;
      pointer-events: none; /* Ngăn văn bản chặn sự kiện click trên phần tử cha */
    }

    .page-win18-login__faq-toggle {
      font-size: 1.5em;
      line-height: 1;
      pointer-events: none; /* Ngăn biểu tượng chặn sự kiện click trên phần tử cha */
      transition: transform 0.3s ease;
    }

    .page-win18-login__faq-item.active .page-win18-login__faq-toggle {
      transform: rotate(45deg); /* Thay đổi '+' thành 'x' trực quan */
    }

    .page-win18-login__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 25px;
      color: var(--win18-text-light);
      background-color: var(--win18-bg-dark);
      transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
      opacity: 0;
    }

    .page-win18-login__faq-item.active .page-win18-login__faq-answer {
      max-height: 2000px !important; /* Đủ lớn để chứa mọi nội dung */
      padding: 20px 25px !important;
      opacity: 1;
    }

    /* Thiết Kế Đáp Ứng */
    @media (max-width: 1024px) {
      .page-win18-login__hero-heading {
        font-size: 2.2em;
      }
      .page-win18-login__hero-text {
        font-size: 1.1em;
      }
    }

    @media (max-width: 768px) {
      .page-win18-login {
        padding: var(--header-offset, 122px) 10px 0; /* Điều chỉnh padding cho màn hình nhỏ hơn */
      }

      .page-win18-login__title {
        font-size: 2em;
        margin-bottom: 20px;
      }

      .page-win18-login__subtitle {
        font-size: 1em;
        margin-bottom: 30px;
      }

      .page-win18-login__button-group {
        flex-direction: column;
        gap: 15px;
      }

      .page-win18-login__hero-heading {
        font-size: 1.8em;
      }

      .page-win18-login__hero-text {
        font-size: 0.95em;
      }

      .page-win18-login__game-categories,
      .page-win18-login__promotions-grid,
      .page-win18-login__why-list {
        grid-template-columns: 1fr; /* Xếp chồng các mục trên di động */
        padding: 0 10px;
      }

      /* Yêu cầu responsive cho các mục danh sách */
      .page-win18-login__why-item,
      .page-win18-login__category-card,
      .page-win18-login__promo-card {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
        padding: 20px !important; /* Điều chỉnh padding cho di động */
      }
      .page-win18-login__why-item-text,
      .page-win18-login__category-description,
      .page-win18-login__promo-description {
        word-wrap: break-word !important;
        overflow-wrap: break-word !important;
        word-break: break-word !important;
      }

      .page-win18-login__faq-list {
        padding: 0 10px;
      }

      .page-win18-login__faq-question {
        padding: 15px 20px;
        font-size: 1.1em;
      }

      .page-win18-login__faq-answer {
        padding: 15px 20px;
      }

      .page-win18-login__floating-buttons {
        width: calc(100% - 20px); /* Tính toán cho 10px padding mỗi bên */
      }
    }

    @media (max-width: 480px) {
      .page-win18-login__hero-heading {
        font-size: 1.5em;
      }
      .page-win18-login__hero-text {
        font-size: 0.9em;
      }
      .page-win18-login__floating-button {
        font-size: 1em;
        padding: 10px 0;
      }
    }