/* Tổng quan */
    :root {
      --page-kufun-primary-bg: #1a1a1a;
      --page-kufun-secondary-bg: #2c2c2c;
      --page-kufun-accent-color: #ffcc00; /* Vàng */
      --page-kufun-text-color: #f0f0f0;
      --page-kufun-light-text: #ffffff;
      --page-kufun-dark-text: #333333;
      --page-kufun-border-color: #444444;
      --page-kufun-button-hover: #e6b800;
    }

    .page-kufun {
      font-family: 'Arial', sans-serif;
      background-color: var(--page-kufun-primary-bg);
      color: var(--page-kufun-text-color);
      line-height: 1.6;
      padding-bottom: 80px; /* Để tránh nút nổi bị che */
    }

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

    .page-kufun-section {
      padding: 40px 0;
      text-align: center;
    }

    .page-kufun-section h1,
    .page-kufun-section h2,
    .page-kufun-section h3 {
      color: var(--page-kufun-accent-color);
      margin-bottom: 25px;
      font-weight: bold;
    }

    .page-kufun-section h1 {
      font-size: 2.5em;
      color: var(--page-kufun-light-text);
      text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
    }

    .page-kufun-section h2 {
      font-size: 2em;
      border-bottom: 2px solid var(--page-kufun-accent-color);
      display: inline-block;
      padding-bottom: 10px;
      margin-bottom: 30px;
    }

    .page-kufun-section p {
      margin-bottom: 20px;
      color: var(--page-kufun-text-color);
    }

    .page-kufun-button {
      display: inline-block;
      background-color: var(--page-kufun-accent-color);
      color: var(--page-kufun-dark-text);
      padding: 12px 25px;
      border-radius: 50px;
      text-decoration: none;
      font-weight: bold;
      transition: background-color 0.3s ease, transform 0.2s ease;
      border: none;
      cursor: pointer;
      font-size: 1em;
    }

    .page-kufun-button:hover {
      background-color: var(--page-kufun-button-hover);
      transform: translateY(-2px);
    }

    /* Nút đăng nhập nổi */
    .page-kufun-floating-btn {
      position: fixed;
      bottom: 20px;
      left: 50%;
      transform: translateX(-50%);
      z-index: 1000;
      background-color: var(--page-kufun-accent-color);
      color: var(--page-kufun-dark-text);
      padding: 15px 30px;
      border-radius: 50px;
      font-size: 1.1em;
      font-weight: bold;
      text-decoration: none;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4);
      animation: page-kufun-pulse 2s infinite;
      white-space: nowrap; /* Ngăn nút bị xuống dòng */
    }

    .page-kufun-floating-btn:hover {
      background-color: var(--page-kufun-button-hover);
      animation: none;
      transform: translateX(-50%) scale(1.05);
    }

    @keyframes page-kufun-pulse {
      0% { transform: translateX(-50%) scale(1); }
      50% { transform: translateX(-50%) scale(1.05); }
      100% { transform: translateX(-50%) scale(1); }
    }

    /* Phần Banner */
    .page-kufun-hero {
      position: relative;
      overflow: hidden;
      padding: 20px 0 40px; /* Đảm bảo banner ở trên, văn bản ở dưới */
      background-color: var(--page-kufun-secondary-bg);
    }

    .page-kufun-hero-image {
      width: 100%;
      max-width: 600px; /* Giới hạn chiều rộng cho thiết bị di động */
      height: auto;
      display: block;
      margin: 0 auto 20px auto; /* Căn giữa và tạo khoảng cách dưới */
      border-radius: 10px;
      box-shadow: 0 5px 20px rgba(0, 0, 0, 0.5);
    }

    .page-kufun-hero-content {
      text-align: center;
      padding: 0 15px;
    }

    .page-kufun-hero-content h1 {
      margin-top: 20px;
      font-size: 2.2em;
      line-height: 1.2;
    }

    .page-kufun-hero-content p {
      font-size: 1.1em;
      margin-bottom: 30px;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
    }

    /* Phần Danh mục trò chơi */
    .page-kufun-games .page-kufun-game-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
      gap: 20px;
      margin-top: 30px;
    }

    .page-kufun-game-card {
      background-color: var(--page-kufun-secondary-bg);
      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: center;
      padding-bottom: 15px;
    }

    .page-kufun-game-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 8px 20px rgba(0, 0, 0, 0.5);
    }

    .page-kufun-game-card img {
      width: 100%;
      height: 120px;
      object-fit: cover;
      display: block;
      border-bottom: 1px solid var(--page-kufun-border-color);
    }

    .page-kufun-game-card h3 {
      font-size: 1.1em;
      margin: 15px 10px 10px;
      color: var(--page-kufun-light-text);
    }

    .page-kufun-game-card a {
      text-decoration: none;
      color: inherit;
    }

    .page-kufun-game-card a:hover h3 {
      color: var(--page-kufun-accent-color);
    }

    /* Phần Tại sao chọn Kufun */
    .page-kufun-features ul {
      list-style: none;
      padding: 0;
      margin: 0 auto;
      max-width: 800px;
      text-align: left;
    }

    .page-kufun-features li {
      background-color: var(--page-kufun-secondary-bg);
      margin-bottom: 15px;
      padding: 20px;
      border-radius: 8px;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
      display: flex;
      align-items: center;
      gap: 15px;
    }

    .page-kufun-features li strong {
      color: var(--page-kufun-accent-color);
      font-size: 1.1em;
    }

    .page-kufun-features li::before {
      content: '✔';
      color: var(--page-kufun-accent-color);
      font-size: 1.5em;
      line-height: 1;
      margin-right: 10px;
    }

    /* Phần Tải xuống */
    .page-kufun-download-grid {
      display: flex;
      flex-direction: column;
      gap: 25px;
      margin-top: 30px;
      align-items: center;
    }

    .page-kufun-download-item {
      background-color: var(--page-kufun-secondary-bg);
      padding: 25px;
      border-radius: 10px;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
      text-align: center;
      width: 100%;
      max-width: 350px;
    }

    .page-kufun-download-item img {
      width: 100px;
      height: 100px;
      margin-bottom: 15px;
    }

    .page-kufun-download-item h3 {
      color: var(--page-kufun-accent-color);
      font-size: 1.4em;
      margin-bottom: 15px;
    }

    .page-kufun-download-item p {
      margin-bottom: 20px;
    }

    .page-kufun-download-item .page-kufun-button {
      width: 80%;
    }

    /* Phần Tin tức */
    .page-kufun-news-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 20px;
      margin-top: 30px;
    }

    .page-kufun-news-card {
      background-color: var(--page-kufun-secondary-bg);
      border-radius: 10px;
      overflow: hidden;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
      text-align: left;
      transition: transform 0.3s ease;
    }

    .page-kufun-news-card:hover {
      transform: translateY(-5px);
    }

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

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

    .page-kufun-news-card-content h3 {
      font-size: 1.2em;
      margin-top: 0;
      margin-bottom: 10px;
      color: var(--page-kufun-light-text);
    }

    .page-kufun-news-card-content p {
      font-size: 0.9em;
      color: var(--page-kufun-text-color);
      margin-bottom: 15px;
    }

    .page-kufun-news-card-content .page-kufun-button {
      padding: 8px 15px;
      font-size: 0.9em;
    }
    
    .page-kufun-news-card-content a {
        text-decoration: none;
        color: inherit;
    }

    .page-kufun-news-card-content a:hover h3 {
        color: var(--page-kufun-accent-color);
    }

    /* Phần FAQ */
    .page-kufun-faq-list {
      max-width: 800px;
      margin: 30px auto 0;
      text-align: left;
    }

    .page-kufun-faq-item {
      background-color: var(--page-kufun-secondary-bg);
      margin-bottom: 10px;
      border-radius: 8px;
      overflow: hidden;
      box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
    }

    .page-kufun-faq-question {
      padding: 15px 20px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: bold;
      color: var(--page-kufun-light-text);
      transition: background-color 0.3s ease;
    }

    .page-kufun-faq-question:hover {
      background-color: #3a3a3a;
    }

    .page-kufun-faq-question span {
      font-size: 1.2em;
      color: var(--page-kufun-accent-color);
    }

    .page-kufun-faq-answer {
      padding: 0 20px 15px;
      color: var(--page-kufun-text-color);
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out;
    }

    .page-kufun-faq-item.active .page-kufun-faq-answer {
      max-height: 200px; /* Điều chỉnh nếu nội dung câu trả lời dài hơn */
      transition: max-height 0.5s ease-in;
    }

    /* Responsive adjustments */
    @media (min-width: 768px) {
      .page-kufun-section h1 {
        font-size: 3.5em;
      }
      .page-kufun-section h2 {
        font-size: 2.5em;
      }
      .page-kufun-hero-content h1 {
        font-size: 3em;
      }
      .page-kufun-games .page-kufun-game-grid {
        grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
      }
      .page-kufun-download-grid {
        flex-direction: row;
        justify-content: center;
      }
    }

    @media (min-width: 1024px) {
      .page-kufun-hero-image {
        max-width: 800px;
      }
      .page-kufun-games .page-kufun-game-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      }
    }