
    /* CSS样式必须内联在<style>标签中，放在<head>标签内 */
    /* 所有CSS类名必须使用BEM命名规则：.page-ko66__element-name */
    /* 禁止使用后代选择器，必须使用BEM风格 */
    /* 禁止使用全局选择器（如 body, html, *） */
    /* 样式作用域限制在 .page-ko66 内 */

    :root {
      --page-ko66-primary-color: #e53935; /* Đỏ tươi */
      --page-ko66-secondary-color: #fdd835; /* Vàng */
      --page-ko66-dark-background: #1a1a1a; /* Nền tối */
      --page-ko66-light-text: #ffffff; /* Chữ trắng */
      --page-ko66-gray-text: #cccccc; /* Chữ xám */
      --page-ko66-border-color: #333333; /* Màu viền */
      --page-ko66-accent-color: #4CAF50; /* Xanh lá */
    }

    .page-ko66 {
      font-family: 'Helvetica Neue', Arial, sans-serif;
      color: var(--page-ko66-light-text);
      background-color: var(--page-ko66-dark-background);
      line-height: 1.6;
    }

    /* 确保英雄区域或第一个内容模块有足够的padding-top */
    .page-ko66__hero-section {
      padding-top: 10px; /* Cho desktop */
      background-color: #000;
      text-align: center;
      position: relative;
    }

    .page-ko66__hero-image-container {
      width: 100%;
      max-width: 100%;
      overflow: hidden;
      box-sizing: border-box;
      display: flex;
      justify-content: center;
      align-items: center;
      margin-bottom: 20px;
    }

    .page-ko66__hero-image {
      width: 100%;
      height: auto;
      display: block;
      max-width: 100%;
    }

    .page-ko66__hero-content {
      padding: 20px 15px;
      max-width: 800px;
      margin: 0 auto;
    }

    .page-ko66__hero-title {
      color: var(--page-ko66-secondary-color);
      font-size: 2.2em;
      margin-bottom: 10px;
      line-height: 1.2;
      text-shadow: 2px 2px 4px rgba(0,0,0,0.7);
    }

    .page-ko66__hero-description {
      font-size: 1.1em;
      color: var(--page-ko66-gray-text);
      margin-bottom: 20px;
    }

    .page-ko66__section {
      padding: 40px 15px;
      max-width: 1200px;
      margin: 0 auto;
      border-bottom: 1px solid var(--page-ko66-border-color);
    }

    .page-ko66__section-title {
      color: var(--page-ko66-primary-color);
      font-size: 2em;
      text-align: center;
      margin-bottom: 30px;
      text-transform: uppercase;
      letter-spacing: 1px;
    }

    .page-ko66__text-block {
      margin-bottom: 20px;
      color: var(--page-ko66-gray-text);
    }

    .page-ko66__game-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: 20px;
      margin-top: 30px;
    }

    .page-ko66__game-card {
      background-color: #2a2a2a;
      border-radius: 10px;
      overflow: hidden;
      text-align: center;
      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.4);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      padding-bottom: 15px;
    }

    .page-ko66__game-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 8px 16px rgba(0, 0, 0, 0.6);
    }

    .page-ko66__game-image-container {
      width: 100%;
      max-width: 100%;
      overflow: hidden;
      box-sizing: border-box;
      height: 180px; /* Fixed height for consistency */
      display: flex;
      justify-content: center;
      align-items: center;
    }

    .page-ko66__game-image {
      width: 100%;
      height: auto;
      display: block;
      object-fit: cover; /* Cover the container */
      max-width: 100%;
    }

    .page-ko66__game-title {
      color: var(--page-ko66-light-text);
      font-size: 1.2em;
      margin: 15px 10px 10px;
    }

    .page-ko66__game-description {
      color: var(--page-ko66-gray-text);
      font-size: 0.9em;
      padding: 0 10px;
    }

    .page-ko66__promotion-card {
      background-color: #2a2a2a;
      border-radius: 10px;
      padding: 20px;
      margin-bottom: 20px;
      box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .page-ko66__promotion-icon-container {
      width: 100px;
      height: 100px;
      flex-shrink: 0;
      overflow: hidden;
      border-radius: 5px;
      display: flex;
      justify-content: center;
      align-items: center;
      box-sizing: border-box;
    }
    .page-ko66__promotion-icon {
      width: 100%;
      height: auto;
      display: block;
      max-width: 100%;
      object-fit: cover;
    }

    .page-ko66__promotion-content {
      flex-grow: 1;
    }

    .page-ko66__promotion-title {
      color: var(--page-ko66-secondary-color);
      font-size: 1.3em;
      margin-bottom: 5px;
    }

    .page-ko66__promotion-description {
      color: var(--page-ko66-gray-text);
      font-size: 0.95em;
    }

    .page-ko66__button {
      display: inline-block;
      background-color: var(--page-ko66-primary-color);
      color: var(--page-ko66-light-text);
      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;
    }

    .page-ko66__button:hover {
      background-color: #d32f2f;
    }

    .page-ko66__button-center {
      text-align: center;
      margin-top: 30px;
    }

    .page-ko66__guide-step {
      background-color: #2a2a2a;
      border-left: 5px solid var(--page-ko66-primary-color);
      padding: 20px;
      margin-bottom: 20px;
      border-radius: 5px;
      box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    }

    .page-ko66__guide-title {
      color: var(--page-ko66-light-text);
      font-size: 1.4em;
      margin-bottom: 10px;
    }

    .page-ko66__guide-text {
      color: var(--page-ko66-gray-text);
    }

    .page-ko66__faq-section {
      background-color: #1f1f1f;
    }

    .page-ko66__faq-item {
      background-color: #2a2a2a;
      margin-bottom: 10px;
      border-radius: 8px;
      overflow: hidden;
      box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
    }

    .page-ko66__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 15px 20px;
      cursor: pointer;
      background-color: #333333;
      color: var(--page-ko66-light-text);
      font-size: 1.1em;
      font-weight: bold;
      transition: background-color 0.3s ease;
      user-select: none;
    }

    .page-ko66__faq-question:hover {
      background-color: #444444;
    }

    .page-ko66__faq-question h3 {
      margin: 0;
      color: inherit;
      font-size: 1em; /* Adjust to match parent font size */
      pointer-events: none; /* Prevent h3 from blocking click event on parent */
    }

    .page-ko66__faq-toggle {
      font-size: 1.5em;
      line-height: 1;
      transition: transform 0.3s ease;
      pointer-events: none; /* Prevent toggle from blocking click event on parent */
    }

    .page-ko66__faq-item.active .page-ko66__faq-toggle {
      transform: rotate(45deg); /* Change + to X or - */
    }

    .page-ko66__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 20px; /* Adjust padding to match question */
      background-color: #2a2a2a;
      color: var(--page-ko66-gray-text);
      transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
      opacity: 0;
    }

    .page-ko66__faq-item.active .page-ko66__faq-answer {
      max-height: 2000px !important; /* Sufficiently large to contain content */
      padding: 20px !important; /* Restore padding */
      opacity: 1;
    }

    .page-ko66__floating-button {
      position: fixed;
      bottom: 20px;
      left: 50%;
      transform: translateX(-50%);
      background-color: var(--page-ko66-accent-color);
      color: var(--page-ko66-light-text);
      padding: 15px 30px;
      border-radius: 50px;
      text-decoration: none;
      font-weight: bold;
      font-size: 1.1em;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.5);
      z-index: 1000;
      transition: background-color 0.3s ease, transform 0.3s ease;
      white-space: nowrap;
      text-align: center;
      display: block;
      max-width: 90%; /* Ensure it doesn't overflow on small screens */
    }

    .page-ko66__floating-button:hover {
      background-color: #4CAF50;
      transform: translateX(-50%) scale(1.05);
    }

    /* Responsive adjustments */
    @media (max-width: 768px) {
      .page-ko66__hero-section {
        padding-top: 10px; /* Mobile padding-top */
      }
      .page-ko66__hero-title {
        font-size: 1.8em;
      }
      .page-ko66__hero-description {
        font-size: 1em;
      }
      .page-ko66__section {
        padding: 30px 10px;
      }
      .page-ko66__section-title {
        font-size: 1.7em;
      }
      .page-ko66__game-grid {
        grid-template-columns: 1fr;
      }
      .page-ko66__promotion-card {
        flex-direction: column;
        text-align: center;
      }
      .page-ko66__promotion-icon-container {
        margin-bottom: 10px;
      }
      .page-ko66__button {
        padding: 10px 20px;
        font-size: 0.95em;
      }
      .page-ko66__faq-question {
        font-size: 1em;
        padding: 12px 15px;
      }
      .page-ko66__faq-answer {
        padding: 0 15px;
      }
      .page-ko66__faq-item.active .page-ko66__faq-answer {
        padding: 15px !important;
      }
      /* 图片响应式优化 */
      .page-ko66__hero-image-container,
      .page-ko66__game-image-container,
      .page-ko66__promotion-icon-container {
        width: 100% !important;
        max-width: 100% !important;
        overflow: hidden !important;
        box-sizing: border-box !important;
      }
      .page-ko66__hero-image,
      .page-ko66__game-image,
      .page-ko66__promotion-icon {
        max-width: 100% !important;
        height: auto !important;
      }
    }
  