:root {
      --page-666vn__primary-color: #e0b300; /* Gold/Yellow */
      --page-666vn__secondary-color: #a30000; /* Dark Red */
      --page-666vn__dark-bg: #1a1a1a; /* Dark background */
      --page-666vn__light-text: #ffffff; /* White text */
      --page-666vn__gray-text: #cccccc; /* Light gray text */
      --page-666vn__accent-gold: #ffcc00; /* Brighter gold for accents */
      --page-666vn__border-color: #333333; /* Darker border */
    }

    .page-666vn {
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
      background-color: var(--page-666vn__dark-bg);
      color: var(--page-666vn__light-text);
      line-height: 1.6;
      overflow-x: hidden;
      padding-top: 10px; /* Minimal padding-top, assuming body has header offset */
    }

    .page-666vn__section {
      padding: 40px 15px;
      max-width: 1200px;
      margin: 0 auto;
      text-align: center;
    }

    .page-666vn__section--dark {
      background-color: #222222;
    }

    .page-666vn__title {
      color: var(--page-666vn__primary-color);
      font-size: 2.5em;
      margin-bottom: 20px;
      text-transform: uppercase;
      font-weight: 700;
    }

    .page-666vn__subtitle {
      color: var(--page-666vn__accent-gold);
      font-size: 1.8em;
      margin-bottom: 30px;
      font-weight: 600;
    }

    .page-666vn__paragraph {
      font-size: 1.1em;
      margin-bottom: 20px;
      color: var(--page-666vn__gray-text);
    }

    .page-666vn__button {
      display: inline-block;
      padding: 12px 30px;
      background-color: var(--page-666vn__primary-color);
      color: var(--page-666vn__dark-bg);
      text-decoration: none;
      border-radius: 5px;
      font-weight: bold;
      transition: background-color 0.3s ease;
      cursor: pointer;
      border: none;
      font-size: 1.1em;
    }

    .page-666vn__button:hover {
      background-color: var(--page-666vn__accent-gold);
      color: #000;
    }

    .page-666vn__button--secondary {
      background-color: var(--page-666vn__secondary-color);
      color: var(--page-666vn__light-text);
    }

    .page-666vn__button--secondary:hover {
      background-color: #c00000;
      color: var(--page-666vn__light-text);
    }

    /* Hero Section */
    .page-666vn__hero-section {
      position: relative;
      padding: 80px 15px 60px;
      background-size: cover;
      background-position: center;
      color: var(--page-666vn__light-text);
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      min-height: 500px;
      text-align: center;
      overflow: hidden;
    }

    .page-666vn__hero-overlay {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: rgba(0, 0, 0, 0.7);
      z-index: 1;
    }

    .page-666vn__hero-content {
      position: relative;
      z-index: 2;
      max-width: 800px;
    }

    .page-666vn__hero-title {
      font-size: 3em;
      margin-bottom: 20px;
      color: var(--page-666vn__primary-color);
      line-height: 1.2;
    }

    .page-666vn__hero-description {
      font-size: 1.3em;
      margin-bottom: 30px;
      color: var(--page-666vn__gray-text);
    }

    /* Floating Buttons */
    .page-666vn__floating-buttons {
      position: fixed;
      bottom: 20px;
      left: 50%;
      transform: translateX(-50%);
      display: flex;
      gap: 15px;
      z-index: 1000;
      width: calc(100% - 30px);
      max-width: 350px;
      justify-content: center;
    }

    .page-666vn__floating-button {
      flex: 1;
      padding: 12px 10px;
      background-color: var(--page-666vn__secondary-color);
      color: var(--page-666vn__light-text);
      text-align: center;
      border-radius: 8px;
      font-weight: bold;
      font-size: 1.1em;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
      transition: background-color 0.3s ease, transform 0.2s ease;
      cursor: pointer;
      border: none;
      white-space: nowrap;
      text-decoration: none; /* Ensure it looks like a button */
    }

    .page-666vn__floating-button:hover {
      background-color: #c00000;
      transform: translateY(-2px);
    }

    .page-666vn__floating-button--register {
      background-color: var(--page-666vn__primary-color);
      color: var(--page-666vn__dark-bg);
    }

    .page-666vn__floating-button--register:hover {
      background-color: var(--page-666vn__accent-gold);
      color: #000;
    }

    /* Game Categories */
    .page-666vn__game-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: 25px;
      margin-top: 30px;
    }

    .page-666vn__game-card {
      background-color: #2a2a2a;
      border-radius: 10px;
      overflow: hidden;
      box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      text-align: center;
      position: relative;
      display: flex;
      flex-direction: column;
      box-sizing: border-box;
    }

    .page-666vn__game-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
    }

    .page-666vn__game-card-image {
      width: 100%;
      height: 180px;
      object-fit: cover;
      display: block;
      max-width: 100%;
    }

    .page-666vn__game-card-content {
      padding: 20px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .page-666vn__game-card-title {
      color: var(--page-666vn__primary-color);
      font-size: 1.4em;
      margin-bottom: 10px;
      font-weight: 600;
    }

    .page-666vn__game-card-description {
      color: var(--page-666vn__gray-text);
      font-size: 0.95em;
      margin-bottom: 15px;
      flex-grow: 1;
      word-wrap: break-word;
      overflow-wrap: break-word;
    }

    /* Promotions Section */
    .page-666vn__promotion-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 30px;
      margin-top: 30px;
    }

    .page-666vn__promotion-card {
      background-color: #2a2a2a;
      border-radius: 10px;
      overflow: hidden;
      box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      text-align: left;
      display: flex;
      flex-direction: column;
      box-sizing: border-box;
    }

    .page-666vn__promotion-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
    }

    .page-666vn__promotion-card-image {
      width: 100%;
      height: 200px;
      object-fit: cover;
      display: block;
      max-width: 100%;
    }

    .page-666vn__promotion-card-content {
      padding: 20px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .page-666vn__promotion-card-title {
      color: var(--page-666vn__accent-gold);
      font-size: 1.5em;
      margin-bottom: 10px;
      font-weight: 600;
    }

    .page-666vn__promotion-card-description {
      color: var(--page-666vn__gray-text);
      font-size: 1em;
      margin-bottom: 15px;
      flex-grow: 1;
      word-wrap: break-word;
      overflow-wrap: break-word;
    }

    /* Why Choose Us Section */
    .page-666vn__features-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 25px;
      margin-top: 30px;
    }

    .page-666vn__feature-item {
      background-color: #2a2a2a;
      border-radius: 10px;
      padding: 25px;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
      text-align: left;
      transition: background-color 0.3s ease;
      box-sizing: border-box;
    }

    .page-666vn__feature-item:hover {
      background-color: #333333;
    }

    .page-666vn__feature-title {
      color: var(--page-666vn__primary-color);
      font-size: 1.3em;
      margin-bottom: 10px;
      font-weight: 600;
    }

    .page-666vn__feature-description {
      color: var(--page-666vn__gray-text);
      font-size: 0.95em;
      word-wrap: break-word;
      overflow-wrap: break-word;
    }

    /* Payment and Provider Logos */
    .page-666vn__logo-grid {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 20px;
      margin-top: 30px;
    }

    .page-666vn__logo-item {
      flex: 0 0 auto;
      background-color: #2a2a2a;
      padding: 15px 25px;
      border-radius: 8px;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
      transition: transform 0.2s ease;
      box-sizing: border-box;
      display: flex;
      align-items: center;
      justify-content: center;
      min-width: 150px;
      max-width: 200px;
      height: 80px;
    }

    .page-666vn__logo-item:hover {
      transform: translateY(-3px);
    }

    .page-666vn__logo-image {
      max-width: 100%;
      max-height: 50px;
      height: auto;
      display: block;
      filter: grayscale(100%) brightness(150%);
      transition: filter 0.3s ease;
    }

    .page-666vn__logo-item:hover .page-666vn__logo-image {
      filter: none;
    }

    /* FAQ Section */
    .page-666vn__faq-container {
      margin-top: 30px;
      text-align: left;
    }

    .page-666vn__faq-item {
      background-color: #2a2a2a;
      border-radius: 10px;
      margin-bottom: 15px;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
      overflow: hidden;
      box-sizing: border-box;
    }

    .page-666vn__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 20px 25px;
      cursor: pointer;
      user-select: none;
      background-color: #333333;
      transition: background-color 0.3s ease;
    }

    .page-666vn__faq-question:hover {
      background-color: #444444;
    }

    .page-666vn__faq-question h3 {
      margin: 0;
      color: var(--page-666vn__primary-color);
      font-size: 1.2em;
      pointer-events: none;
      flex-grow: 1;
      word-wrap: break-word;
      overflow-wrap: break-word;
    }

    .page-666vn__faq-toggle {
      font-size: 1.8em;
      font-weight: bold;
      color: var(--page-666vn__accent-gold);
      margin-left: 15px;
      transition: transform 0.3s ease;
      pointer-events: none;
    }

    .page-666vn__faq-item.active .page-666vn__faq-toggle {
      transform: rotate(45deg);
    }

    .page-666vn__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 25px;
      color: var(--page-666vn__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;
      font-size: 1em;
    }

    .page-666vn__faq-item.active .page-666vn__faq-answer {
      max-height: 2000px !important;
      padding: 20px 25px !important;
      opacity: 1;
    }

    /* Responsive Design */
    @media (max-width: 768px) {
      .page-666vn__section {
        padding: 30px 10px;
      }

      .page-666vn__title {
        font-size: 2em;
      }

      .page-666vn__subtitle {
        font-size: 1.5em;
      }

      .page-666vn__hero-section {
        padding: 60px 10px 40px;
        min-height: 400px;
      }

      .page-666vn__hero-title {
        font-size: 2.2em;
      }

      .page-666vn__hero-description {
        font-size: 1.1em;
      }

      .page-666vn__floating-buttons {
        bottom: 15px;
        gap: 10px;
        max-width: calc(100% - 20px);
      }

      .page-666vn__floating-button {
        padding: 10px 8px;
        font-size: 1em;
      }

      /* List item responsive requirements */
      .page-666vn__game-grid,
      .page-666vn__promotion-grid,
      .page-666vn__features-grid {
        grid-template-columns: 1fr;
        gap: 20px;
      }

      .page-666vn__game-card,
      .page-666vn__promotion-card,
      .page-666vn__feature-item,
      .page-666vn__logo-item,
      .page-666vn__faq-item {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
      }

      .page-666vn__game-card-description,
      .page-666vn__promotion-card-description,
      .page-666vn__feature-description,
      .page-666vn__faq-answer {
        word-wrap: break-word !important;
        overflow-wrap: break-word !important;
        word-break: break-word !important;
      }

      .page-666vn__game-card-image,
      .page-666vn__promotion-card-image,
      .page-666vn__logo-image {
        max-width: 100% !important;
        height: auto !important;
        box-sizing: border-box !important;
      }

      .page-666vn__logo-grid {
        gap: 10px;
      }

      .page-666vn__logo-item {
        min-width: 120px;
        max-width: 48%;
        height: 70px;
        padding: 10px 15px;
      }

      .page-666vn__faq-question {
        padding: 15px 20px;
      }

      .page-666vn__faq-question h3 {
        font-size: 1.1em;
      }

      .page-666vn__faq-toggle {
        font-size: 1.5em;
      }

      .page-666vn__faq-answer {
        padding: 0 20px;
      }

      .page-666vn__faq-item.active .page-666vn__faq-answer {
        padding: 15px 20px !important;
      }
    }

    @media (max-width: 480px) {
      .page-666vn__hero-title {
        font-size: 1.8em;
      }

      .page-666vn__hero-description {
        font-size: 1em;
      }

      .page-666vn__button {
        padding: 10px 20px;
        font-size: 1em;
      }

      .page-666vn__title {
        font-size: 1.8em;
      }

      .page-666vn__subtitle {
        font-size: 1.3em;
      }

      .page-666vn__logo-item {
        min-width: unset;
        width: 45%;
        max-width: 45%;
      }
    }