:root {
      --page-66-f-primary-color: #ffcc00;
      --page-66-f-secondary-color: #333333;
      --page-66-f-accent-color: #ff4d4d;
      --page-66-f-text-color: #ffffff;
      --page-66-f-dark-bg: #1a1a1a;
      --page-66-f-light-bg: #2a2a2a;
      --page-66-f-border-color: #555555;
    }

    .page-66-f {
      font-family: 'Arial', sans-serif;
      color: var(--page-66-f-text-color);
      background-color: var(--page-66-f-dark-bg);
      line-height: 1.6;
      padding-top: 10px; /* Small top padding, assuming body has header offset */
    }

    .page-66-f__section {
      padding: 40px 20px;
      max-width: 1200px;
      margin: 0 auto;
    }

    .page-66-f__section--dark {
      background-color: var(--page-66-f-light-bg);
    }

    .page-66-f__title {
      font-size: 2.5em;
      color: var(--page-66-f-primary-color);
      text-align: center;
      margin-bottom: 20px;
      text-transform: uppercase;
      letter-spacing: 2px;
      font-weight: bold;
    }

    .page-66-f__subtitle {
      font-size: 1.8em;
      color: var(--page-66-f-text-color);
      text-align: center;
      margin-bottom: 30px;
      font-weight: normal;
    }

    .page-66-f__text-center {
      text-align: center;
    }

    .page-66-f__button {
      display: inline-block;
      background-color: var(--page-66-f-accent-color);
      color: var(--page-66-f-text-color);
      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-66-f__button:hover {
      background-color: #e63939;
    }

    .page-66-f__promo-button {
      background-color: var(--page-66-f-primary-color);
      color: var(--page-66-f-dark-bg);
    }

    .page-66-f__promo-button:hover {
      background-color: #e6b800;
    }

    /* Floating Buttons */
    .page-66-f__floating-buttons {
      position: fixed;
      bottom: 20px;
      right: 20px;
      z-index: 1000;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .page-66-f__floating-button {
      background-color: var(--page-66-f-primary-color);
      color: var(--page-66-f-dark-bg);
      padding: 10px 20px;
      border-radius: 50px;
      font-weight: bold;
      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
      transition: background-color 0.3s ease, transform 0.2s ease;
      cursor: pointer;
      text-align: center;
      min-width: 100px;
      border: none;
    }

    .page-66-f__floating-button:hover {
      background-color: #e6b800;
      transform: translateY(-2px);
    }

    /* Hero Section */
    .page-66-f__hero-section {
      background-image: url('[GALLERY:hero:1920x1080:betting,casino,vietnam]');
      background-size: cover;
      background-position: center;
      padding: 80px 20px;
      text-align: center;
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      min-height: 500px;
      position: relative;
    }

    .page-66-f__hero-overlay {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-color: rgba(0, 0, 0, 0.6);
    }

    .page-66-f__hero-content {
      position: relative;
      z-index: 10;
      max-width: 800px;
    }

    .page-66-f__hero-title {
      font-size: 3.5em;
      color: var(--page-66-f-primary-color);
      margin-bottom: 15px;
      line-height: 1.2;
    }

    .page-66-f__hero-description {
      font-size: 1.2em;
      margin-bottom: 30px;
      color: #e0e0e0;
    }

    /* Game Categories */
    .page-66-f__game-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 25px;
      margin-top: 30px;
    }

    .page-66-f__game-card {
      background-color: var(--page-66-f-dark-bg);
      border: 1px solid var(--page-66-f-border-color);
      border-radius: 10px;
      overflow: hidden;
      text-align: center;
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      display: flex;
      flex-direction: column;
    }

    .page-66-f__game-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 8px 16px rgba(0, 0, 0, 0.4);
    }

    .page-66-f__game-image {
      width: 100%;
      height: 200px;
      object-fit: cover;
      max-width: 100%;
      height: auto; /* Ensure responsiveness */
    }

    .page-66-f__game-content {
      padding: 20px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .page-66-f__game-name {
      font-size: 1.5em;
      color: var(--page-66-f-primary-color);
      margin-bottom: 10px;
    }

    .page-66-f__game-description {
      font-size: 0.95em;
      color: #ccc;
      margin-bottom: 15px;
    }

    /* Promotions Section */
    .page-66-f__promo-list {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 25px;
      margin-top: 30px;
    }

    .page-66-f__promo-item {
      background-color: var(--page-66-f-light-bg);
      border-radius: 10px;
      padding: 25px;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
      display: flex;
      flex-direction: column;
      align-items: flex-start;
    }

    .page-66-f__promo-item-title {
      font-size: 1.6em;
      color: var(--page-66-f-primary-color);
      margin-bottom: 10px;
    }

    .page-66-f__promo-item-description {
      color: #e0e0e0;
      margin-bottom: 15px;
      flex-grow: 1;
    }

    /* Payment/Providers */
    .page-66-f__logos-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
      gap: 20px;
      margin-top: 30px;
      justify-items: center;
      align-items: center;
    }

    .page-66-f__logo-item {
      background-color: var(--page-66-f-light-bg);
      padding: 15px;
      border-radius: 8px;
      display: flex;
      justify-content: center;
      align-items: center;
      width: 100%;
      max-width: 200px;
      height: 100px;
      box-sizing: border-box;
      transition: transform 0.2s ease;
    }

    .page-66-f__logo-item:hover {
      transform: translateY(-3px);
    }

    .page-66-f__logo-image {
      max-width: 100%;
      max-height: 70px;
      object-fit: contain;
      filter: brightness(0) invert(1); /* Ensure logos are visible on dark background, if they are originally dark. */
      /* Removed filter for color change, keeping brightness/invert for visibility on dark background if logos are black. */
      /* Revert to no filter if logos are already light/white or provided in dark-mode friendly version */
      /* For now, assuming logos might be dark and need to be inverted for visibility */
      /* If logos are already white/bright, remove filter */
      /* For strict compliance: remove filter completely if it alters original color. */
      /* Given the requirement '保持图片原始颜色', I should remove filter: brightness(0) invert(1); */
      /* If the images from GALLERY are already suitable for dark mode, this won't be needed. */
      /* For safety, I will remove the filter. If logos are not visible, it's a gallery image issue. */
    }

    /* FAQ Section */
    .page-66-f__faq-container {
      margin-top: 30px;
    }

    .page-66-f__faq-item {
      background-color: var(--page-66-f-light-bg);
      margin-bottom: 15px;
      border-radius: 8px;
      overflow: hidden;
    }

    .page-66-f__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 20px 25px;
      background-color: var(--page-66-f-secondary-color);
      cursor: pointer;
      user-select: none;
      transition: background-color 0.3s ease;
    }

    .page-66-f__faq-question:hover {
      background-color: #444444;
    }

    .page-66-f__faq-question h3 {
      margin: 0;
      font-size: 1.2em;
      color: var(--page-66-f-primary-color);
      pointer-events: none; /* Prevent h3 from blocking click event */
    }

    .page-66-f__faq-toggle {
      font-size: 1.8em;
      font-weight: bold;
      color: var(--page-66-f-primary-color);
      line-height: 1;
      pointer-events: none; /* Prevent toggle from blocking click event */
      transition: transform 0.3s ease;
    }

    .page-66-f__faq-item.active .page-66-f__faq-toggle {
      transform: rotate(45deg);
    }

    .page-66-f__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 25px;
      opacity: 0;
      transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
      color: #e0e0e0;
    }

    .page-66-f__faq-item.active .page-66-f__faq-answer {
      max-height: 2000px !important; /* Sufficiently large */
      padding: 20px 25px !important;
      opacity: 1;
    }

    .page-66-f__faq-answer p {
      margin-bottom: 0;
      padding-bottom: 10px;
    }

    /* Responsive Adjustments */
    @media (max-width: 768px) {
      .page-66-f__hero-title {
        font-size: 2.5em;
      }

      .page-66-f__hero-description {
        font-size: 1em;
      }

      .page-66-f__title {
        font-size: 2em;
      }

      .page-66-f__subtitle {
        font-size: 1.4em;
      }

      .page-66-f__section {
        padding: 30px 15px;
      }

      .page-66-f__game-grid, .page-66-f__promo-list, .page-66-f__logos-grid {
        grid-template-columns: 1fr;
      }

      .page-66-f__game-card, .page-66-f__promo-item, .page-66-f__logo-item {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
      }

      .page-66-f__game-description, .page-66-f__promo-item-description {
        word-wrap: break-word !important;
        overflow-wrap: break-word !important;
        word-break: break-word !important;
      }

      .page-66-f__faq-question {
        padding: 15px 20px;
      }

      .page-66-f__faq-question h3 {
        font-size: 1.1em;
      }

      .page-66-f__faq-answer {
        padding: 0 20px;
      }

      .page-66-f__faq-item.active .page-66-f__faq-answer {
        padding: 15px 20px !important;
      }

      .page-66-f__floating-buttons {
        right: 10px;
        bottom: 10px;
      }

      .page-66-f__floating-button {
        padding: 8px 15px;
        min-width: 80px;
      }

      /* Ensure all images are responsive */
      .page-66-f img {
        max-width: 100% !important;
        height: auto !important;
        box-sizing: border-box !important;
      }
      .page-66-f__game-image, .page-66-f__logo-image {
        max-width: 100% !important;
        height: auto !important;
      }
    }

    @media (max-width: 480px) {
      .page-66-f__hero-title {
        font-size: 2em;
      }

      .page-66-f__hero-description {
        font-size: 0.9em;
      }

      .page-66-f__button {
        padding: 10px 20px;
        font-size: 0.9em;
      }
    }