/* CSS cho trang s666 */
    .page-s666 {
      font-family: 'Arial', sans-serif;
      background-color: #1a1a1a; /* Nền tối */
      color: #f0f0f0; /* Chữ sáng */
      line-height: 1.6;
      padding-bottom: 80px; /* Để tránh nút nổi bị che */
    }

    .page-s666 .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 15px;
    }

    /* Banner Section */
    .page-s666 .banner-section {
      text-align: center;
      position: relative;
      overflow: hidden;
      padding-bottom: 20px; /* Khoảng cách giữa banner và nội dung dưới */
    }

    .page-s666 .banner-image {
      width: 100%;
      height: auto;
      display: block;
      max-width: 100%; /* Đảm bảo hình ảnh không vượt quá chiều rộng của phần tử cha */
    }

    .page-s666 .banner-content {
      position: relative;
      z-index: 10;
      padding: 15px;
      background: linear-gradient(to top, rgba(26, 26, 26, 0.9), rgba(26, 26, 26, 0.7));
      margin-top: -5px; /* Kéo lên một chút để tạo hiệu ứng liền mạch */
    }

    .page-s666 .banner-content h1 {
      font-size: 2.2em;
      color: #ffcc00; /* Màu vàng nổi bật */
      margin-bottom: 10px;
      text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
    }

    .page-s666 .banner-content p {
      font-size: 1.1em;
      color: #e0e0e0;
      margin-bottom: 20px;
    }

    .page-s666 .btn-primary {
      display: inline-block;
      background-color: #ffcc00;
      color: #1a1a1a;
      padding: 12px 25px;
      border-radius: 30px;
      text-decoration: none;
      font-weight: bold;
      transition: background-color 0.3s ease, transform 0.2s ease;
      font-size: 1.1em;
      border: none;
      cursor: pointer;
    }

    .page-s666 .btn-primary:hover {
      background-color: #ffe066;
      transform: translateY(-2px);
    }

    /* Floating Login Button */
    .page-s666 .floating-login-btn {
      position: fixed;
      bottom: 20px;
      right: 20px;
      background-color: #ff3366; /* Màu nổi bật cho khuyến mãi */
      color: #fff;
      padding: 15px 25px;
      border-radius: 50px;
      text-decoration: none;
      font-weight: bold;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
      z-index: 1000;
      display: flex;
      align-items: center;
      gap: 8px;
      transition: background-color 0.3s ease, transform 0.2s ease;
      font-size: 1.1em;
      border: none;
      cursor: pointer;
    }

    .page-s666 .floating-login-btn:hover {
      background-color: #ff6688;
      transform: translateY(-3px);
    }

    .page-s666 .floating-login-btn .icon {
      font-size: 1.2em;
    }

    /* Section Styling */
    .page-s666 .section {
      padding: 40px 0;
      text-align: center;
    }

    .page-s666 .section:nth-of-type(even) {
      background-color: #222;
    }

    .page-s666 .section h2 {
      font-size: 2em;
      color: #ffcc00;
      margin-bottom: 25px;
      position: relative;
      padding-bottom: 10px;
    }

    .page-s666 .section h2::after {
      content: '';
      position: absolute;
      left: 50%;
      bottom: 0;
      transform: translateX(-50%);
      width: 60px;
      height: 3px;
      background-color: #ffcc00;
      border-radius: 2px;
    }

    .page-s666 .section p {
      font-size: 1em;
      color: #e0e0e0;
      margin-bottom: 20px;
    }

    /* Game Categories */
    .page-s666 .game-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
      gap: 20px;
      margin-top: 30px;
    }

    .page-s666 .game-card {
      background-color: #2c2c2c;
      border-radius: 10px;
      padding: 15px;
      text-align: center;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      text-decoration: none;
      color: inherit;
    }

    .page-s666 .game-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 6px 15px rgba(0, 0, 0, 0.4);
    }

    .page-s666 .game-card img {
      width: 80px;
      height: 80px;
      object-fit: contain;
      margin-bottom: 10px;
      border-radius: 5px;
    }

    .page-s666 .game-card h3 {
      font-size: 1.1em;
      color: #ffcc00;
      margin: 0;
    }

    /* Why Choose Section */
    .page-s666 .feature-list {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 20px;
      margin-top: 30px;
    }

    .page-s666 .feature-item {
      background-color: #2c2c2c;
      border-radius: 10px;
      padding: 20px;
      flex: 1 1 calc(50% - 20px); /* 2 items per row on mobile */
      max-width: calc(50% - 20px);
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
      text-align: left;
    }

    .page-s666 .feature-item h3 {
      color: #ffcc00;
      font-size: 1.2em;
      margin-bottom: 10px;
    }

    .page-s666 .feature-item p {
      color: #e0e0e0;
      font-size: 0.95em;
    }

    /* News & Tips */
    .page-s666 .news-grid {
      display: grid;
      grid-template-columns: 1fr; /* Single column on mobile */
      gap: 20px;
      margin-top: 30px;
    }

    .page-s666 .news-card {
      background-color: #2c2c2c;
      border-radius: 10px;
      overflow: hidden;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      text-align: left;
      text-decoration: none;
      color: inherit;
    }

    .page-s666 .news-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 6px 15px rgba(0, 0, 0, 0.4);
    }

    .page-s666 .news-card img {
      width: 100%;
      height: 180px;
      object-fit: cover;
    }

    .page-s666 .news-card-content {
      padding: 15px;
    }

    .page-s666 .news-card-content h3 {
      font-size: 1.1em;
      color: #ffcc00;
      margin-bottom: 10px;
    }

    .page-s666 .news-card-content p {
      font-size: 0.9em;
      color: #aaaaaa;
    }

    /* Payment & Providers */
    .page-s666 .logo-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
      gap: 15px;
      margin-top: 30px;
    }

    .page-s666 .logo-item img {
      width: 100%;
      height: 50px;
      object-fit: contain;
      filter: grayscale(80%) brightness(1.2);
      transition: filter 0.3s ease;
    }

    .page-s666 .logo-item img:hover {
      filter: grayscale(0%) brightness(1);
    }

    /* Responsive adjustments */
    @media (min-width: 768px) {
      .page-s666 .banner-content h1 {
        font-size: 3em;
      }
      .page-s666 .banner-content p {
        font-size: 1.2em;
      }
      .page-s666 .game-grid {
        grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
      }
      .page-s666 .feature-item {
        flex: 1 1 calc(33.333% - 20px); /* 3 items per row on tablet */
        max-width: calc(33.333% - 20px);
      }
      .page-s666 .news-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); /* 2-3 columns on tablet */
      }
      .page-s666 .logo-grid {
        grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
      }
    }

    @media (min-width: 1024px) {
      .page-s666 .banner-content h1 {
        font-size: 3.5em;
      }
      .page-s666 .feature-item {
        flex: 1 1 calc(25% - 20px); /* 4 items per row on desktop */
        max-width: calc(25% - 20px);
      }
      .page-s666 .news-grid {
        grid-template-columns: repeat(3, 1fr); /* 3 columns on desktop */
      }
    }

    /* Utility classes for text alignment */
    .page-s666 .text-center { text-align: center; }
    .page-s666 .text-left { text-align: left; }
    .page-s666 .text-right { text-align: right; }