/* CSS cho trang f168 đăng nhập */
    .page-f168dangnhap {
      font-family: 'Arial', sans-serif;
      color: #333;
      background-color: #f0f2f5;
      line-height: 1.6;
    }

    .page-f168dangnhap .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 20px;
    }

    .page-f168dangnhap .section {
      background-color: #fff;
      margin-bottom: 25px;
      padding: 30px;
      border-radius: 10px;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    }

    .page-f168dangnhap .section-title {
      color: #c0392b; /* Màu đỏ đậm */
      text-align: center;
      margin-bottom: 30px;
      font-size: 2.2em;
      font-weight: bold;
      position: relative;
    }

    .page-f168dangnhap .section-title::after {
      content: '';
      display: block;
      width: 60px;
      height: 4px;
      background-color: #c0392b;
      margin: 10px auto 0;
      border-radius: 2px;
    }

    .page-f168dangnhap .hero-banner {
      position: relative;
      width: 100%;
      height: auto; /* Chiều cao tự động */
      margin-bottom: 25px;
      overflow: hidden;
      border-radius: 10px;
      padding-top: 140px; /* Vùng an toàn cho header cố định */
    }

    .page-f168dangnhap .hero-banner img {
      width: 100%;
      height: auto;
      display: block;
      border-radius: 10px;
    }

    .page-f168dangnhap .hero-content {
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      text-align: center;
      color: #fff;
      background-color: rgba(0, 0, 0, 0.5);
      padding: 20px 30px;
      border-radius: 10px;
      max-width: 90%;
    }

    .page-f168dangnhap .hero-content h1 {
      font-size: 2.8em;
      margin-bottom: 15px;
      color: #f39c12; /* Màu cam */
      line-height: 1.2;
    }

    .page-f168dangnhap .hero-content p {
      font-size: 1.2em;
      margin-bottom: 25px;
    }

    .page-f168dangnhap .btn-primary {
      display: inline-block;
      background-color: #e74c3c; /* Màu đỏ cam */
      color: #fff;
      padding: 15px 30px;
      border-radius: 50px;
      text-decoration: none;
      font-weight: bold;
      font-size: 1.1em;
      transition: background-color 0.3s ease;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    }

    .page-f168dangnhap .btn-primary:hover {
      background-color: #c0392b;
    }

    .page-f168dangnhap .steps-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 25px;
      margin-top: 20px;
    }

    .page-f168dangnhap .step-card {
      background-color: #f9f9f9;
      padding: 25px;
      border-radius: 8px;
      text-align: center;
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
      transition: transform 0.3s ease;
    }

    .page-f168dangnhap .step-card:hover {
      transform: translateY(-5px);
    }

    .page-f168dangnhap .step-card .step-number {
      font-size: 2.5em;
      color: #e74c3c;
      font-weight: bold;
      margin-bottom: 15px;
      line-height: 1;
    }

    .page-f168dangnhap .step-card h3 {
      font-size: 1.5em;
      color: #34495e;
      margin-bottom: 10px;
    }

    .page-f168dangnhap .step-card p {
      color: #555;
      font-size: 0.95em;
    }

    .page-f168dangnhap .promo-list {
      list-style: none;
      padding: 0;
      margin-top: 20px;
    }

    .page-f168dangnhap .promo-list li {
      background-color: #ecf0f1;
      padding: 15px 20px;
      margin-bottom: 10px;
      border-radius: 8px;
      display: flex;
      align-items: center;
      font-size: 1.1em;
      color: #34495e;
      box-shadow: 0 1px 5px rgba(0, 0, 0, 0.05);
    }

    .page-f168dangnhap .promo-list li::before {
      content: '✨';
      margin-right: 10px;
      font-size: 1.2em;
    }

    .page-f168dangnhap .game-categories-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
      gap: 20px;
      margin-top: 20px;
      text-align: center;
    }

    .page-f168dangnhap .game-category-card {
      background-color: #f9f9f9;
      padding: 15px;
      border-radius: 8px;
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
      transition: transform 0.3s ease;
      text-decoration: none;
      color: #333;
    }

    .page-f168dangnhap .game-category-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
    }

    .page-f168dangnhap .game-category-card img {
      width: 80px;
      height: 80px;
      object-fit: contain;
      margin-bottom: 10px;
      border-radius: 5px;
    }

    .page-f168dangnhap .game-category-card h4 {
      font-size: 1.1em;
      color: #c0392b;
      margin: 0;
    }

    .page-f168dangnhap .provider-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
      gap: 15px;
      margin-top: 20px;
      text-align: center;
    }

    .page-f168dangnhap .provider-logo {
      background-color: #ecf0f1;
      padding: 10px;
      border-radius: 8px;
      box-shadow: 0 1px 5px rgba(0, 0, 0, 0.05);
      display: flex;
      justify-content: center;
      align-items: center;
      min-height: 70px;
    }

    .page-f168dangnhap .provider-logo img {
      max-width: 100%;
      max-height: 50px;
      object-fit: contain;
    }

    .page-f168dangnhap .faq-item {
      margin-bottom: 15px;
      border-bottom: 1px solid #eee;
      padding-bottom: 15px;
    }

    .page-f168dangnhap .faq-item h3 {
      color: #34495e;
      font-size: 1.3em;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .page-f168dangnhap .faq-item h3::after {
      content: '+';
      font-size: 1.2em;
      transition: transform 0.3s ease;
    }

    .page-f168dangnhap .faq-item.active h3::after {
      content: '-';
      transform: rotate(180deg);
    }

    .page-f168dangnhap .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out;
      color: #555;
      padding-left: 10px;
      font-size: 0.95em;
    }

    .page-f168dangnhap .faq-answer.active {
      max-height: 200px; /* Adjust as needed */
      padding-top: 10px;
    }

    .page-f168dangnhap .floating-button {
      position: fixed;
      bottom: 20px;
      left: 50%;
      transform: translateX(-50%);
      background-color: #28a745; /* Màu xanh lá nổi bật */
      color: #fff;
      padding: 15px 30px;
      border-radius: 50px;
      text-decoration: none;
      font-weight: bold;
      font-size: 1.2em;
      text-align: center;
      box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
      z-index: 1000;
      transition: background-color 0.3s ease;
      white-space: nowrap; /* Ngăn nút bị xuống dòng */
    }

    .page-f168dangnhap .floating-button:hover {
      background-color: #218838;
    }
    
    /* Responsive adjustments */
    @media (max-width: 768px) {
      .page-f168dangnhap .hero-content h1 {
        font-size: 2em;
      }
      .page-f168dangnhap .hero-content p {
        font-size: 1em;
      }
      .page-f168dangnhap .btn-primary,
      .page-f168dangnhap .floating-button {
        padding: 12px 25px;
        font-size: 1em;
      }
      .page-f168dangnhap .section-title {
        font-size: 1.8em;
      }
      .page-f168dangnhap .container {
        padding: 15px;
      }
      .page-f168dangnhap .hero-banner {
        padding-top: 100px; /* Adjust safe area for smaller screens */
      }
    }

    @media (max-width: 480px) {
      .page-f168dangnhap .hero-content h1 {
        font-size: 1.6em;
      }
      .page-f168dangnhap .hero-content p {
        font-size: 0.9em;
      }
      .page-f168dangnhap .btn-primary,
      .page-f168dangnhap .floating-button {
        padding: 10px 20px;
        font-size: 0.9em;
      }
      .page-f168dangnhap .section-title {
        font-size: 1.5em;
      }
      .page-f168dangnhap .floating-button {
        width: calc(100% - 40px);
        left: 20px;
        transform: translateX(0);
        bottom: 15px;
      }
      .page-f168dangnhap .hero-banner {
        padding-top: 80px; /* Further adjust safe area for very small screens */
      }
    }