:root {
      --page-999betvn-primary-color: #e44d26; /* Cam đỏ */
      --page-999betvn-secondary-color: #f4f4f4; /* Xám nhạt */
      --page-999betvn-accent-color: #333; /* Đen đậm */
      --page-999betvn-text-color: #333; /* Màu chữ chính */
      --page-999betvn-light-text-color: #fff; /* Màu chữ sáng */
      --page-999betvn-border-color: #ddd; /* Màu viền */
      --page-999betvn-button-bg: #e44d26;
      --page-999betvn-button-text: #fff;
      --page-999betvn-hover-bg: #c23e1e;
    }

    .page-999betvn {
      font-family: 'Arial', sans-serif;
      line-height: 1.6;
      color: var(--page-999betvn-text-color);
      background-color: var(--page-999betvn-secondary-color);
      padding: 0;
      margin: 0;
      overflow-x: hidden;
    }

    .page-999betvn__container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 20px;
    }

    /* Hero Section */
    .page-999betvn__hero-section {
      position: relative;
      width: 100%;
      min-height: 400px;
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      text-align: center;
      color: var(--page-999betvn-light-text-color);
      padding-top: 10px; /* Required padding for fixed header */
      box-sizing: border-box;
      overflow: hidden;
    }

    .page-999betvn__hero-background {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      z-index: -1;
      filter: brightness(0.7); /* Slightly dim the background image for text readability */
    }

    .page-999betvn__hero-content {
      position: relative;
      z-index: 1;
      max-width: 800px;
      padding: 20px;
      background-color: rgba(0, 0, 0, 0.4);
      border-radius: 8px;
    }

    .page-999betvn__hero-title {
      font-size: 2.8em;
      margin-bottom: 15px;
      font-weight: bold;
      color: var(--page-999betvn-light-text-color);
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.6);
    }

    .page-999betvn__hero-description {
      font-size: 1.2em;
      margin-bottom: 25px;
      color: var(--page-999betvn-light-text-color);
    }

    .page-999betvn__hero-button {
      display: inline-block;
      background-color: var(--page-999betvn-primary-color);
      color: var(--page-999betvn-light-text-color);
      padding: 15px 30px;
      border-radius: 5px;
      font-size: 1.1em;
      font-weight: bold;
      text-decoration: none;
      transition: background-color 0.3s ease;
      cursor: pointer;
      border: none;
    }

    .page-999betvn__hero-button:hover {
      background-color: var(--page-999betvn-hover-bg);
    }

    /* Floating Login Button */
    .page-999betvn__floating-button {
      position: fixed;
      bottom: 20px;
      right: 20px;
      background-color: var(--page-999betvn-primary-color);
      color: var(--page-999betvn-light-text-color);
      padding: 15px 25px;
      border-radius: 50px;
      font-size: 1.1em;
      font-weight: bold;
      text-align: center;
      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
      z-index: 100;
      cursor: pointer;
      transition: background-color 0.3s ease, transform 0.3s ease;
      animation: page-999betvn-pulse 2s infinite;
      text-decoration: none; /* Ensure it looks like a button */
    }

    .page-999betvn__floating-button:hover {
      background-color: var(--page-999betvn-hover-bg);
      transform: scale(1.05);
    }

    @keyframes page-999betvn-pulse {
      0% { transform: scale(1); }
      50% { transform: scale(1.03); }
      100% { transform: scale(1); }
    }

    /* General Section Styling */
    .page-999betvn__section {
      padding: 40px 20px;
      background-color: var(--page-999betvn-light-text-color);
      margin-bottom: 20px;
      border-radius: 8px;
      box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    }

    .page-999betvn__section:nth-of-type(even) {
      background-color: var(--page-999betvn-secondary-color);
    }

    .page-999betvn__section-title {
      font-size: 2.2em;
      color: var(--page-999betvn-accent-color);
      text-align: center;
      margin-bottom: 30px;
      position: relative;
    }

    .page-999betvn__section-title::after {
      content: '';
      display: block;
      width: 60px;
      height: 4px;
      background-color: var(--page-999betvn-primary-color);
      margin: 10px auto 0;
      border-radius: 2px;
    }

    .page-999betvn__text-content {
      font-size: 1.1em;
      line-height: 1.8;
      margin-bottom: 20px;
      text-align: justify;
    }

    .page-999betvn__text-content strong {
      color: var(--page-999betvn-primary-color);
    }

    /* Game Categories */
    .page-999betvn__game-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 25px;
      margin-top: 30px;
    }

    .page-999betvn__game-card {
      background-color: var(--page-999betvn-light-text-color);
      border-radius: 10px;
      overflow: hidden;
      box-shadow: 0 4px 10px rgba(0,0,0,0.1);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      text-align: center;
      padding-bottom: 20px;
      display: flex;
      flex-direction: column;
      align-items: center;
    }

    .page-999betvn__game-card:hover {
      transform: translateY(-8px);
      box-shadow: 0 6px 15px rgba(0,0,0,0.15);
    }

    .page-999betvn__game-image-wrapper {
      width: 100%;
      max-height: 200px;
      overflow: hidden;
      margin-bottom: 15px;
    }

    .page-999betvn__game-image {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }

    .page-999betvn__game-title {
      font-size: 1.5em;
      color: var(--page-999betvn-primary-color);
      margin-bottom: 10px;
      padding: 0 15px;
    }

    .page-999betvn__game-description {
      font-size: 0.95em;
      color: var(--page-999betvn-text-color);
      padding: 0 15px;
      margin-bottom: 15px;
      flex-grow: 1; /* Allows description to take up available space */
    }

    .page-999betvn__game-button {
      background-color: var(--page-999betvn-accent-color);
      color: var(--page-999betvn-light-text-color);
      padding: 10px 20px;
      border-radius: 5px;
      text-decoration: none;
      font-size: 0.9em;
      transition: background-color 0.3s ease;
      cursor: pointer;
      border: none;
    }

    .page-999betvn__game-button:hover {
      background-color: var(--page-999betvn-primary-color);
    }

    /* Promotions Section */
    .page-999betvn__promo-list {
      list-style: none;
      padding: 0;
      margin: 0;
    }

    .page-999betvn__promo-item {
      background-color: var(--page-999betvn-light-text-color);
      border: 1px solid var(--page-999betvn-border-color);
      border-radius: 8px;
      padding: 20px;
      margin-bottom: 15px;
      display: flex;
      align-items: center;
      gap: 20px;
      box-shadow: 0 2px 5px rgba(0,0,0,0.05);
    }

    .page-999betvn__promo-icon {
      flex-shrink: 0;
      width: 80px;
      height: 80px;
      object-fit: cover;
      border-radius: 8px;
    }

    .page-999betvn__promo-content h3 {
      font-size: 1.4em;
      color: var(--page-999betvn-primary-color);
      margin-top: 0;
      margin-bottom: 10px;
    }

    .page-999betvn__promo-content p {
      margin: 0;
      font-size: 1em;
      color: var(--page-999betvn-text-color);
    }

    /* How-To Guide */
    .page-999betvn__guide-steps {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 25px;
      margin-top: 30px;
    }

    .page-999betvn__step-card {
      background-color: var(--page-999betvn-light-text-color);
      border-radius: 10px;
      box-shadow: 0 4px 10px rgba(0,0,0,0.1);
      padding: 25px;
      text-align: center;
      transition: transform 0.3s ease;
    }

    .page-999betvn__step-card:hover {
      transform: translateY(-5px);
    }

    .page-999betvn__step-icon {
      width: 100px;
      height: 100px;
      object-fit: contain;
      margin-bottom: 15px;
    }

    .page-999betvn__step-title {
      font-size: 1.4em;
      color: var(--page-999betvn-accent-color);
      margin-bottom: 10px;
    }

    .page-999betvn__step-description {
      font-size: 1em;
      color: var(--page-999betvn-text-color);
    }

    /* App Download Section */
    .page-999betvn__app-download {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 20px;
      padding: 30px;
      background-color: var(--page-999betvn-primary-color);
      color: var(--page-999betvn-light-text-color);
      border-radius: 8px;
      text-align: center;
    }

    .page-999betvn__app-title {
      font-size: 2em;
      margin-bottom: 10px;
      color: var(--page-999betvn-light-text-color);
    }

    .page-999betvn__app-description {
      font-size: 1.1em;
      margin-bottom: 20px;
      max-width: 700px;
    }

    .page-999betvn__app-buttons {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 15px;
    }

    .page-999betvn__download-button {
      background-color: var(--page-999betvn-accent-color);
      color: var(--page-999betvn-light-text-color);
      padding: 12px 25px;
      border-radius: 5px;
      text-decoration: none;
      font-size: 1em;
      font-weight: bold;
      transition: background-color 0.3s ease;
      cursor: pointer;
      border: none;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .page-999betvn__download-button:hover {
      background-color: var(--page-999betvn-hover-bg);
    }

    .page-999betvn__download-button img {
      width: 24px;
      height: 24px;
      object-fit: contain;
      max-width: 100%; /* Ensure responsive */
      height: auto; /* Ensure responsive */
    }

    /* FAQ Section */
    .page-999betvn__faq-section {
      background-color: var(--page-999betvn-light-text-color);
      padding: 40px 20px;
      margin-bottom: 20px;
      border-radius: 8px;
      box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    }

    .page-999betvn__faq-item {
      border-bottom: 1px solid var(--page-999betvn-border-color);
      margin-bottom: 10px;
      padding-bottom: 10px;
    }

    .page-999betvn__faq-item:last-child {
      border-bottom: none;
      margin-bottom: 0;
      padding-bottom: 0;
    }

    .page-999betvn__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      padding: 15px 0;
      font-size: 1.2em;
      font-weight: bold;
      color: var(--page-999betvn-accent-color);
      user-select: none;
      transition: color 0.3s ease;
    }

    .page-999betvn__faq-question:hover {
      color: var(--page-999betvn-primary-color);
    }

    .page-999betvn__faq-question h3 {
      margin: 0;
      font-size: 1.2em;
      pointer-events: none; /* Prevent h3 from blocking click event */
    }

    .page-999betvn__faq-toggle {
      font-size: 1.5em;
      line-height: 1;
      margin-left: 10px;
      pointer-events: none; /* Prevent toggle icon from blocking click event */
      transition: transform 0.3s ease;
      color: var(--page-999betvn-primary-color);
    }

    .page-999betvn__faq-item.active .page-999betvn__faq-toggle {
      transform: rotate(45deg); /* Change '+' to 'x' visually */
    }

    .page-999betvn__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 15px;
      opacity: 0;
      transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
      font-size: 1em;
      color: var(--page-999betvn-text-color);
    }

    .page-999betvn__faq-item.active .page-999betvn__faq-answer {
      max-height: 2000px !important; /* Use !important for override */
      padding: 20px 15px !important; /* Use !important for override */
      opacity: 1;
    }

    /* Responsive Design */
    @media (max-width: 768px) {
      .page-999betvn__hero-section {
        min-height: 300px;
        padding-top: 10px; /* Required padding for fixed header on mobile */
      }

      .page-999betvn__hero-title {
        font-size: 2em;
      }

      .page-999betvn__hero-description {
        font-size: 1em;
      }

      .page-999betvn__hero-button {
        padding: 12px 25px;
        font-size: 1em;
      }

      .page-999betvn__section {
        padding: 30px 15px;
      }

      .page-999betvn__section-title {
        font-size: 1.8em;
      }

      .page-999betvn__text-content {
        font-size: 1em;
      }

      .page-999betvn__game-grid {
        grid-template-columns: 1fr;
      }

      .page-999betvn__promo-item {
        flex-direction: column;
        text-align: center;
        gap: 10px;
      }

      .page-999betvn__promo-icon {
        width: 60px;
        height: 60px;
      }

      .page-999betvn__promo-content h3 {
        font-size: 1.2em;
      }

      .page-999betvn__guide-steps {
        grid-template-columns: 1fr;
      }

      .page-999betvn__app-title {
        font-size: 1.6em;
      }

      .page-999betvn__app-description {
        font-size: 0.95em;
      }

      .page-999betvn__app-buttons {
        flex-direction: column;
        width: 100%;
      }

      .page-999betvn__download-button {
        width: 80%;
        margin: 0 auto;
        justify-content: center;
        padding: 10px 20px;
        font-size: 0.9em;
      }

      .page-999betvn__faq-question {
        font-size: 1.1em;
        padding: 12px 0;
      }

      .page-999betvn__faq-question h3 {
        font-size: 1.1em;
      }

      .page-999betvn__faq-answer {
        padding: 15px 10px;
        font-size: 0.95em;
      }

      .page-999betvn__faq-item.active .page-999betvn__faq-answer {
        padding: 15px 10px !important; /* Use !important for override */
      }

      /* Ensure all images are responsive on mobile */
      .page-999betvn img {
        max-width: 100% !important;
        height: auto !important;
      }
      .page-999betvn__game-image-wrapper,
      .page-999betvn__step-card img {
        width: 100% !important;
        max-width: 100% !important;
        overflow: hidden !important;
        box-sizing: border-box !important;
      }
    }