:root {
      --page-bk8-primary-color: #e44d26; /* Màu cam đỏ */
      --page-bk8-secondary-color: #333; /* Màu xám đậm */
      --page-bk8-accent-color: #f7b32b; /* Màu vàng cam */
      --page-bk8-text-color: #333;
      --page-bk8-light-text-color: #f8f8f8;
      --page-bk8-background-light: #f4f4f4;
      --page-bk8-background-dark: #222;
      --page-bk8-border-color: #ddd;
    }

    .page-bk8 {
      font-family: 'Arial', sans-serif;
      line-height: 1.6;
      color: var(--page-bk8-text-color);
      background-color: var(--page-bk8-background-light);
    }

    /* Fixed header spacing */
    .page-bk8__hero-section,
    .page-bk8__floating-button {
      padding-top: 120px; /* Desktop */
    }

    @media (max-width: 768px) {
      .page-bk8__hero-section,
      .page-bk8__floating-button {
        padding-top: 100px; /* Mobile */
      }
    }

    .page-bk8__section {
      padding: 60px 20px;
      max-width: 1200px;
      margin: 0 auto;
      text-align: center;
    }

    .page-bk8__section--dark {
      background-color: var(--page-bk8-background-dark);
      color: var(--page-bk8-light-text-color);
    }

    .page-bk8__heading {
      font-size: 2.8em;
      color: var(--page-bk8-primary-color);
      margin-bottom: 30px;
      font-weight: bold;
    }

    .page-bk8__heading--dark {
      color: var(--page-bk8-accent-color);
    }

    .page-bk8__subheading {
      font-size: 1.8em;
      color: var(--page-bk8-secondary-color);
      margin-bottom: 20px;
    }

    .page-bk8__paragraph {
      font-size: 1.1em;
      margin-bottom: 20px;
      line-height: 1.8;
      text-align: justify;
    }

    .page-bk8__button {
      display: inline-block;
      background-color: var(--page-bk8-primary-color);
      color: var(--page-bk8-light-text-color);
      padding: 15px 30px;
      border-radius: 8px;
      text-decoration: none;
      font-weight: bold;
      font-size: 1.1em;
      transition: background-color 0.3s ease, transform 0.3s ease;
      border: none;
      cursor: pointer;
    }

    .page-bk8__button:hover {
      background-color: #c93d18;
      transform: translateY(-2px);
    }

    /* Hero Section */
    .page-bk8__hero-section {
      position: relative;
      width: 100%;
      overflow: hidden;
      text-align: center;
      background-color: var(--page-bk8-background-dark);
      padding-bottom: 40px;
    }

    .page-bk8__hero-image-wrapper {
      width: 100%;
      overflow: hidden;
      box-sizing: border-box;
      display: flex;
      justify-content: center;
      align-items: center;
      margin-bottom: 20px;
    }

    .page-bk8__hero-image {
      max-width: 100%;
      height: auto;
      display: block;
      border-radius: 10px;
      box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
    }

    .page-bk8__hero-content {
      position: relative;
      z-index: 1;
      padding: 0 20px;
    }

    .page-bk8__hero-title {
      font-size: 3.5em;
      color: var(--page-bk8-accent-color);
      margin-bottom: 15px;
      line-height: 1.2;
      font-weight: 900;
    }

    .page-bk8__hero-description {
      font-size: 1.5em;
      color: var(--page-bk8-light-text-color);
      margin-bottom: 30px;
      font-weight: 300;
    }

    /* Floating Button */
    .page-bk8__floating-button {
      position: fixed;
      bottom: 20px;
      right: 20px;
      z-index: 1000;
      display: block;
      background-color: #28a745; /* Green for registration/promo */
      color: white;
      padding: 15px 25px;
      border-radius: 50px;
      text-decoration: none;
      font-weight: bold;
      font-size: 1.1em;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
      transition: background-color 0.3s ease, transform 0.3s ease, opacity 0.3s ease;
      opacity: 0.95;
      animation: page-bk8-pulse 2s infinite;
      text-align: center;
      max-width: 280px;
    }

    .page-bk8__floating-button:hover {
      background-color: #218838;
      transform: scale(1.05);
      opacity: 1;
    }

    @keyframes page-bk8-pulse {
      0% { transform: scale(1); box-shadow: 0 0 0 0 rgba(40, 167, 69, 0.7); }
      70% { transform: scale(1.03); box-shadow: 0 0 0 15px rgba(40, 167, 69, 0); }
      100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(40, 167, 69, 0); }
    }

    /* Game Categories */
    .page-bk8__game-categories {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
      margin-top: 40px;
    }

    .page-bk8__game-card {
      background-color: white;
      border-radius: 12px;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
      overflow: hidden;
      text-align: center;
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .page-bk8__game-card:hover {
      transform: translateY(-10px);
      box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
    }

    .page-bk8__game-card-image-wrapper {
      width: 100%;
      height: 200px;
      overflow: hidden;
      display: flex;
      justify-content: center;
      align-items: center;
      background-color: #eee;
    }

    .page-bk8__game-card-image {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }

    .page-bk8__game-card-content {
      padding: 20px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .page-bk8__game-card-title {
      font-size: 1.5em;
      color: var(--page-bk8-primary-color);
      margin-bottom: 10px;
      font-weight: bold;
    }

    .page-bk8__game-card-title a {
      color: var(--page-bk8-primary-color);
      text-decoration: none;
      transition: color 0.3s ease;
    }

    .page-bk8__game-card-title a:hover {
      color: var(--page-bk8-accent-color);
    }

    .page-bk8__game-card-description {
      font-size: 0.95em;
      color: var(--page-bk8-secondary-color);
      margin-bottom: 15px;
    }

    /* Game Providers */
    .page-bk8__providers-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(100px, 1fr)); /* Smaller for logos */
      gap: 20px;
      margin-top: 40px;
      align-items: center;
      justify-items: center;
    }

    .page-bk8__provider-logo-wrapper {
      width: 100%;
      max-width: 150px; /* Max width for logos */
      height: 100px; /* Fixed height for consistency */
      overflow: hidden;
      display: flex;
      justify-content: center;
      align-items: center;
      background-color: white;
      border-radius: 8px;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
    }

    .page-bk8__provider-logo-wrapper:hover {
      transform: translateY(-5px);
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    }

    .page-bk8__provider-logo {
      max-width: 80%;
      max-height: 80%;
      object-fit: contain;
      display: block;
    }

    /* App Download */
    .page-bk8__app-download-content {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 30px;
      margin-top: 40px;
    }

    .page-bk8__app-qr-code-wrapper {
      width: 100%;
      max-width: 250px;
      height: 250px;
      overflow: hidden;
      box-sizing: border-box;
      display: flex;
      justify-content: center;
      align-items: center;
      background-color: white;
      padding: 15px;
      border-radius: 12px;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    }

    .page-bk8__app-qr-code {
      max-width: 100%;
      height: auto;
      display: block;
    }

    .page-bk8__app-buttons {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 20px;
    }

    .page-bk8__app-button {
      background-color: #007bff; /* Blue for app stores */
      color: white;
      padding: 12px 25px;
      border-radius: 8px;
      text-decoration: none;
      font-weight: bold;
      font-size: 1em;
      transition: background-color 0.3s ease, transform 0.3s ease;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .page-bk8__app-button--android {
      background-color: #3DDC84; /* Android green */
    }

    .page-bk8__app-button--ios {
      background-color: #007AFF; /* iOS blue */
    }

    .page-bk8__app-button:hover {
      transform: translateY(-2px);
      opacity: 0.9;
    }

    /* FAQ Section */
    .page-bk8__faq-list {
      margin-top: 40px;
      text-align: left;
    }

    .page-bk8__faq-item {
      background-color: white;
      border-radius: 10px;
      margin-bottom: 15px;
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
      overflow: hidden;
    }

    .page-bk8__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 20px 25px;
      background-color: var(--page-bk8-primary-color);
      color: var(--page-bk8-light-text-color);
      cursor: pointer;
      user-select: none;
      transition: background-color 0.3s ease;
    }

    .page-bk8__faq-question:hover {
      background-color: #c93d18;
    }

    .page-bk8__faq-question h3 {
      margin: 0;
      font-size: 1.2em;
      font-weight: bold;
      pointer-events: none; /* Prevents text selection from interfering with click */
      color: var(--page-bk8-light-text-color); /* Ensure text color is white */
    }

    .page-bk8__faq-toggle {
      font-size: 1.8em;
      font-weight: bold;
      line-height: 1;
      pointer-events: none; /* Prevents toggle from interfering with click */
      transition: transform 0.3s ease;
    }

    .page-bk8__faq-item.active .page-bk8__faq-toggle {
      transform: rotate(45deg); /* Change '+' to 'x' or '-' */
    }

    .page-bk8__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 25px;
      background-color: #fff;
      color: var(--page-bk8-text-color);
      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;
      text-align: justify;
    }

    .page-bk8__faq-item.active .page-bk8__faq-answer {
      max-height: 2000px !important; /* Sufficiently large to show content */
      padding: 20px 25px !important;
      opacity: 1;
    }

    /* Responsive adjustments */
    @media (max-width: 1024px) {
      .page-bk8__hero-title {
        font-size: 3em;
      }
      .page-bk8__hero-description {
        font-size: 1.3em;
      }
      .page-bk8__heading {
        font-size: 2.2em;
      }
      .page-bk8__subheading {
        font-size: 1.6em;
      }
      .page-bk8__section {
        padding: 50px 15px;
      }
    }

    @media (max-width: 768px) {
      .page-bk8__hero-title {
        font-size: 2.5em;
      }
      .page-bk8__hero-description {
        font-size: 1.1em;
      }
      .page-bk8__heading {
        font-size: 2em;
      }
      .page-bk8__subheading {
        font-size: 1.4em;
      }
      .page-bk8__paragraph {
        font-size: 1em;
      }
      .page-bk8__floating-button {
        width: calc(100% - 40px);
        left: 20px;
        right: 20px;
        bottom: 15px;
        font-size: 1em;
        padding: 12px 20px;
        max-width: unset;
      }
      .page-bk8__game-categories {
        grid-template-columns: 1fr;
      }
      .page-bk8__game-card-image-wrapper {
        height: 180px;
      }
      .page-bk8__providers-grid {
        grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
      }
      .page-bk8__provider-logo-wrapper {
        max-width: 120px;
        height: 80px;
      }
      .page-bk8__app-download-content {
        flex-direction: column;
      }
      .page-bk8__app-qr-code-wrapper {
        width: 200px;
        height: 200px;
      }
      .page-bk8__app-buttons {
        flex-direction: column;
        width: 100%;
      }
      .page-bk8__app-button {
        width: 100%;
        justify-content: center;
      }
      .page-bk8__faq-question {
        padding: 15px 20px;
      }
      .page-bk8__faq-question h3 {
        font-size: 1.1em;
      }
      .page-bk8__faq-answer {
        padding: 0 20px;
      }
      .page-bk8__faq-item.active .page-bk8__faq-answer {
        padding: 15px 20px !important;
      }

      /* Image responsiveness for all images */
      .page-bk8 img {
        max-width: 100% !important;
        height: auto !important;
        box-sizing: border-box !important;
      }
      .page-bk8 > div:has(img) { /* Target direct parent of img, if img is sole content */
        width: 100% !important;
        max-width: 100% !important;
        overflow: hidden !important;
        box-sizing: border-box !important;
      }
    }

    @media (max-width: 480px) {
      .page-bk8__hero-title {
        font-size: 2em;
      }
      .page-bk8__hero-description {
        font-size: 0.95em;
      }
      .page-bk8__heading {
        font-size: 1.8em;
      }
      .page-bk8__subheading {
        font-size: 1.2em;
      }
      .page-bk8__button {
        padding: 12px 20px;
        font-size: 1em;
      }
    }