:root {
      --page-66ko__primary-color: #e44d26; /* Cam đậm */
      --page-66ko__secondary-color: #f7931e; /* Cam nhạt */
      --page-66ko__dark-bg: #1a1a1a; /* Nền tối */
      --page-66ko__light-text: #ffffff; /* Chữ sáng */
      --page-66ko__accent-color: #4CAF50; /* Xanh lá */
      --page-66ko__border-color: #333333; /* Màu viền */
      --page-66ko__text-color-contrast: #e0e0e0; /* Màu chữ có độ tương phản tốt */
      --page-66ko__button-hover-bg: #d4421f; /* Màu nút hover */
    }

    /* Base styles for the page-66ko content */
    .page-66ko {
      font-family: 'Arial', sans-serif;
      color: var(--page-66ko__light-text);
      background-color: var(--page-66ko__dark-bg);
      line-height: 1.6;
      padding-bottom: 100px; /* Space for fixed buttons */
      padding-top: 10px; /* Small padding top for initial content */
    }

    .page-66ko__section {
      padding: 40px 15px;
      max-width: 1200px;
      margin: 0 auto;
      text-align: center;
      box-sizing: border-box;
    }

    .page-66ko__section-title {
      font-size: 2.5em;
      color: var(--page-66ko__primary-color);
      margin-bottom: 30px;
      text-transform: uppercase;
      font-weight: bold;
    }

    .page-66ko__section-subtitle {
      font-size: 1.2em;
      color: var(--page-66ko__text-color-contrast);
      margin-bottom: 40px;
    }

    /* Hero Section */
    .page-66ko__hero-section {
      background-image: url('[GALLERY:hero:1920x1080:66ko,background,gaming,abstract]');
      background-size: cover;
      background-position: center;
      padding: 80px 15px;
      position: relative;
      overflow: hidden;
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      text-align: center;
      min-height: 400px;
      box-sizing: border-box;
    }

    .page-66ko__hero-title {
      font-size: 3.5em;
      color: var(--page-66ko__light-text);
      margin-bottom: 20px;
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
      line-height: 1.2;
    }

    .page-66ko__hero-subtitle {
      font-size: 1.5em;
      color: var(--page-66ko__text-color-contrast);
      margin-bottom: 30px;
      text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.5);
    }

    .page-66ko__hero-buttons {
      display: flex;
      gap: 20px;
      flex-wrap: wrap;
      justify-content: center;
    }

    .page-66ko__hero-button {
      display: inline-block;
      padding: 15px 30px;
      background-color: var(--page-66ko__primary-color);
      color: var(--page-66ko__light-text);
      text-decoration: none;
      border-radius: 8px;
      font-size: 1.1em;
      font-weight: bold;
      transition: background-color 0.3s ease, transform 0.2s ease;
      border: none;
      cursor: pointer;
      box-sizing: border-box;
    }

    .page-66ko__hero-button:hover {
      background-color: var(--page-66ko__button-hover-bg);
      transform: translateY(-2px);
    }

    /* Fixed Floating Buttons */
    .page-66ko__fixed-buttons-wrapper {
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      background-color: rgba(0, 0, 0, 0.8);
      padding: 10px 15px;
      display: flex;
      justify-content: space-around;
      align-items: center;
      z-index: 1000;
      box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.5);
      box-sizing: border-box;
    }

    .page-66ko__fixed-button {
      flex: 1;
      text-align: center;
      padding: 12px 0;
      background-color: var(--page-66ko__accent-color);
      color: var(--page-66ko__light-text);
      text-decoration: none;
      border-radius: 6px;
      font-size: 1em;
      font-weight: bold;
      margin: 0 5px;
      transition: background-color 0.3s ease;
      box-sizing: border-box;
    }

    .page-66ko__fixed-button--register {
      background-color: var(--page-66ko__primary-color);
    }

    .page-66ko__fixed-button--login {
      background-color: #3498db; /* Xanh dương */
    }

    .page-66ko__fixed-button--register:hover {
      background-color: var(--page-66ko__button-hover-bg);
    }

    .page-66ko__fixed-button--login:hover {
      background-color: #2980b9;
    }

    /* Game Categories/Products */
    .page-66ko__game-categories {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 25px;
      margin-top: 40px;
    }

    .page-66ko__game-card {
      background-color: #2a2a2a;
      border-radius: 12px;
      overflow: hidden;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      padding-bottom: 20px;
      border: 1px solid var(--page-66ko__border-color);
      box-sizing: border-box;
    }

    .page-66ko__game-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 8px 25px rgba(0, 0, 0, 0.5);
    }

    .page-66ko__game-card-image {
      width: 100%;
      height: 200px;
      object-fit: cover;
      display: block;
      margin-bottom: 15px;
    }

    .page-66ko__game-card-title {
      font-size: 1.5em;
      color: var(--page-66ko__secondary-color);
      margin-bottom: 10px;
      padding: 0 15px;
    }

    .page-66ko__game-card-description {
      font-size: 0.95em;
      color: var(--page-66ko__text-color-contrast);
      padding: 0 15px;
      margin-bottom: 15px;
    }

    .page-66ko__game-card-button {
      display: inline-block;
      padding: 10px 20px;
      background-color: var(--page-66ko__primary-color);
      color: var(--page-66ko__light-text);
      border-radius: 6px;
      font-weight: bold;
      transition: background-color 0.3s ease;
      border: none;
      cursor: pointer;
      box-sizing: border-box;
    }

    .page-66ko__game-card-button:hover {
      background-color: var(--page-66ko__button-hover-bg);
    }

    /* Promotions Section */
    .page-66ko__promotions-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 30px;
      margin-top: 40px;
    }

    .page-66ko__promo-card {
      background-color: #2a2a2a;
      border-radius: 12px;
      padding: 25px;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
      text-align: left;
      border: 1px solid var(--page-66ko__border-color);
      box-sizing: border-box;
    }

    .page-66ko__promo-card-image {
      width: 100%;
      height: 200px;
      object-fit: cover;
      border-radius: 8px;
      margin-bottom: 20px;
    }

    .page-66ko__promo-card-title {
      font-size: 1.6em;
      color: var(--page-66ko__accent-color);
      margin-bottom: 10px;
    }

    .page-66ko__promo-card-description {
      font-size: 1em;
      color: var(--page-66ko__text-color-contrast);
      margin-bottom: 20px;
    }

    .page-66ko__promo-card-button {
      display: inline-block;
      padding: 12px 25px;
      background-color: var(--page-66ko__primary-color);
      color: var(--page-66ko__light-text);
      border-radius: 6px;
      font-weight: bold;
      transition: background-color 0.3s ease;
      border: none;
      cursor: pointer;
      box-sizing: border-box;
    }

    .page-66ko__promo-card-button:hover {
      background-color: var(--page-66ko__button-hover-bg);
    }

    /* About Section */
    .page-66ko__about-content {
      display: flex;
      flex-direction: column;
      gap: 20px;
      text-align: left;
    }

    .page-66ko__about-text {
      font-size: 1.1em;
      color: var(--page-66ko__text-color-contrast);
    }

    .page-66ko__about-features {
      list-style: none;
      padding: 0;
      margin-top: 20px;
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 15px;
    }

    .page-66ko__about-feature-item {
      background-color: #2a2a2a;
      border-left: 4px solid var(--page-66ko__secondary-color);
      padding: 15px 20px;
      border-radius: 8px;
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
      color: var(--page-66ko__light-text);
      font-weight: bold;
      box-sizing: border-box;
    }

    /* Payment Methods & Game Providers */
    .page-66ko__partners-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
      gap: 20px;
      margin-top: 40px;
      justify-items: center;
    }

    .page-66ko__partner-logo {
      width: 180px;
      height: 100px;
      object-fit: contain;
      filter: grayscale(100%) brightness(150%);
      transition: filter 0.3s ease;
    }

    .page-66ko__partner-logo:hover {
      filter: grayscale(0%) brightness(100%);
    }

    /* FAQ Section */
    .page-66ko__faq-container {
      margin-top: 40px;
      text-align: left;
    }

    .page-66ko__faq-item {
      background-color: #2a2a2a;
      border: 1px solid var(--page-66ko__border-color);
      margin-bottom: 15px;
      border-radius: 8px;
      overflow: hidden;
      box-sizing: border-box;
    }

    .page-66ko__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 20px 25px;
      cursor: pointer;
      background-color: #333333;
      font-size: 1.15em;
      font-weight: bold;
      color: var(--page-66ko__light-text);
      transition: background-color 0.3s ease;
      user-select: none;
      box-sizing: border-box;
    }

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

    .page-66ko__faq-question h3 {
      margin: 0;
      color: inherit;
      pointer-events: none; /* Prevent h3 from blocking click on parent */
    }

    .page-66ko__faq-toggle {
      font-size: 1.5em;
      line-height: 1;
      transition: transform 0.3s ease;
      pointer-events: none; /* Prevent toggle icon from blocking click on parent */
    }

    .page-66ko__faq-item.active .page-66ko__faq-toggle {
      transform: rotate(45deg); /* Change + to X (or - by rotating) */
    }

    .page-66ko__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 25px;
      opacity: 0;
      color: var(--page-66ko__text-color-contrast);
      font-size: 1em;
      transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
      box-sizing: border-box;
    }

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

    /* News Section */
    .page-66ko__news-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
      margin-top: 40px;
    }

    .page-66ko__news-card {
      background-color: #2a2a2a;
      border-radius: 12px;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
      text-align: left;
      overflow: hidden;
      border: 1px solid var(--page-66ko__border-color);
      box-sizing: border-box;
    }

    .page-66ko__news-card-image {
      width: 100%;
      height: 180px;
      object-fit: cover;
      display: block;
      border-bottom: 1px solid var(--page-66ko__border-color);
    }

    .page-66ko__news-card-content {
      padding: 20px;
    }

    .page-66ko__news-card-date {
      font-size: 0.85em;
      color: #999999;
      margin-bottom: 10px;
    }

    .page-66ko__news-card-title {
      font-size: 1.3em;
      color: var(--page-66ko__secondary-color);
      margin-bottom: 15px;
    }

    .page-66ko__news-card-excerpt {
      font-size: 0.95em;
      color: var(--page-66ko__text-color-contrast);
      margin-bottom: 20px;
    }

    .page-66ko__news-card-read-more {
      display: inline-block;
      color: var(--page-66ko__primary-color);
      font-weight: bold;
      text-decoration: none;
      transition: color 0.3s ease;
    }

    .page-66ko__news-card-read-more:hover {
      color: var(--page-66ko__accent-color);
    }

    /* General Image Responsiveness */
    .page-66ko img {
      max-width: 100%;
      height: auto;
      display: block; /* Remove extra space below images */
    }

    /* Responsive adjustments */
    @media (max-width: 768px) {
      .page-66ko__section {
        padding: 30px 10px;
      }

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

      .page-66ko__hero-section {
        padding: 60px 10px;
        min-height: 300px;
      }

      .page-66ko__hero-title {
        font-size: 2.5em;
      }

      .page-66ko__hero-subtitle {
        font-size: 1.2em;
      }

      .page-66ko__hero-buttons {
        flex-direction: column;
        gap: 15px;
      }

      .page-66ko__hero-button {
        width: 100%;
        max-width: 280px;
      }

      .page-66ko__fixed-buttons-wrapper {
        flex-direction: row; /* Keep row for small screens */
        padding: 8px 5px;
      }

      .page-66ko__fixed-button {
        font-size: 0.9em;
        padding: 10px 0;
        margin: 0 3px;
      }

      .page-66ko__game-categories,
      .page-66ko__promotions-grid,
      .page-66ko__partners-grid,
      .page-66ko__news-grid,
      .page-66ko__about-features {
        grid-template-columns: 1fr;
        gap: 20px;
      }

      /* List item mobile responsiveness */
      .page-66ko__about-features li,
      .page-66ko__faq-item,
      .page-66ko__game-card,
      .page-66ko__promo-card,
      .page-66ko__news-card {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
        padding-left: 10px !important;
        padding-right: 10px !important;
      }
      .page-66ko__about-features {
          padding: 0 !important;
      }

      .page-66ko__faq-question {
        padding: 15px 15px;
        font-size: 1em;
      }

      .page-66ko__faq-answer {
        padding: 0 15px;
      }

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

      .page-66ko__news-card-content,
      .page-66ko__promo-card {
        padding: 15px;
      }

      /* Ensure images are fully responsive */
      .page-66ko img {
        max-width: 100% !important;
        height: auto !important;
        box-sizing: border-box !important;
      }
      .page-66ko__game-card-image,
      .page-66ko__promo-card-image,
      .page-66ko__news-card-image {
          width: 100% !important;
          height: auto !important; /* Allow height to adjust */
          min-height: 150px; /* Ensure a minimum height for images */
          max-height: 250px;
          object-fit: cover !important;
          box-sizing: border-box !important;
      }
    }