/* Tổng quan */
    .page-tr88app {
      font-family: 'Arial', sans-serif;
      color: #333;
      line-height: 1.6;
      background-color: #f9f9f9;
    }

    /* Hero Section */
    .page-tr88app__hero-section {
      position: relative;
      width: 100%;
      overflow: hidden;
      text-align: center;
      padding-top: 10px; /* Adjust for fixed header */
      padding-bottom: 40px;
      background-color: #0d2a4a; /* Dark background for contrast */
      color: #fff;
    }

    .page-tr88app__hero-image {
      width: 100%;
      height: auto;
      display: block;
      object-fit: cover;
      max-height: 500px;
    }

    .page-tr88app__hero-content {
      position: relative;
      z-index: 1;
      padding: 20px;
      max-width: 900px;
      margin: 0 auto;
    }

    .page-tr88app__hero-title {
      font-size: 2.8em;
      margin-bottom: 15px;
      color: #ffd700; /* Gold color for emphasis */
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    }

    .page-tr88app__hero-subtitle {
      font-size: 1.4em;
      margin-bottom: 30px;
      color: #e0e0e0;
    }

    /* Floating Promotion Button */
    .page-tr88app__floating-button {
      position: fixed;
      bottom: 20px;
      right: 20px;
      background-color: #ff4500; /* Orange-red for urgency */
      color: #fff;
      padding: 15px 25px;
      border-radius: 50px;
      font-size: 1.2em;
      font-weight: bold;
      text-align: center;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
      cursor: pointer;
      z-index: 1000;
      transition: transform 0.3s ease, background-color 0.3s ease;
      text-decoration: none; /* Ensure it looks like a button, not a link */
      display: flex;
      align-items: center;
      justify-content: center;
      max-width: 280px; /* Limit width */
      box-sizing: border-box;
    }

    .page-tr88app__floating-button:hover {
      background-color: #cc3700;
      transform: translateY(-3px);
    }

    /* Sections */
    .page-tr88app__section {
      padding: 40px 20px;
      max-width: 1200px;
      margin: 0 auto;
      background-color: #fff;
      border-radius: 8px;
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
      margin-bottom: 30px;
    }

    .page-tr88app__section-title {
      font-size: 2.2em;
      color: #0d2a4a;
      text-align: center;
      margin-bottom: 30px;
      position: relative;
      padding-bottom: 10px;
    }

    .page-tr88app__section-title::after {
      content: '';
      position: absolute;
      left: 50%;
      bottom: 0;
      transform: translateX(-50%);
      width: 80px;
      height: 4px;
      background-color: #ffd700;
      border-radius: 2px;
    }

    .page-tr88app__content {
      font-size: 1.1em;
      margin-bottom: 20px;
      color: #555;
    }

    /* Game Categories Grid */
    .page-tr88app__game-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 25px;
      margin-top: 30px;
    }

    .page-tr88app__game-card {
      background-color: #f0f0f0;
      border-radius: 10px;
      overflow: hidden;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
      text-align: center;
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      display: flex;
      flex-direction: column;
      height: 100%;
    }

    .page-tr88app__game-card:hover {
      transform: translateY(-8px);
      box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
    }

    .page-tr88app__game-image {
      width: 100%;
      height: 200px; /* Fixed height for consistency */
      object-fit: cover;
      display: block;
    }

    .page-tr88app__game-title {
      font-size: 1.4em;
      color: #0d2a4a;
      padding: 15px 10px;
      margin-top: auto; /* Push title to bottom if image is smaller */
    }

    /* Download Guide Steps */
    .page-tr88app__steps-container {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 30px;
      margin-top: 30px;
    }

    .page-tr88app__step-item {
      background-color: #f8f8f8;
      border: 1px solid #eee;
      border-radius: 10px;
      padding: 25px;
      text-align: center;
      flex: 1 1 calc(33% - 20px); /* Three items per row on desktop */
      max-width: calc(33% - 20px);
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
      box-sizing: border-box;
    }

    .page-tr88app__step-icon {
      font-size: 3em;
      color: #ff4500;
      margin-bottom: 15px;
    }

    .page-tr88app__step-title {
      font-size: 1.5em;
      color: #0d2a4a;
      margin-bottom: 10px;
    }

    .page-tr88app__step-description {
      color: #555;
      font-size: 1em;
    }

    .page-tr88app__download-buttons {
      display: flex;
      justify-content: center;
      gap: 20px;
      margin-top: 40px;
      flex-wrap: wrap;
    }

    .page-tr88app__download-button {
      background-color: #007bff; /* Blue for app stores */
      color: #fff;
      padding: 15px 30px;
      border-radius: 8px;
      font-size: 1.2em;
      font-weight: bold;
      text-decoration: none;
      transition: background-color 0.3s ease;
      display: flex;
      align-items: center;
      gap: 10px;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
      max-width: 250px;
      box-sizing: border-box;
    }

    .page-tr88app__download-button--android {
      background-color: #3DDC84; /* Android green */
    }

    .page-tr88app__download-button--ios {
      background-color: #007bff; /* Apple blue */
    }

    .page-tr88app__download-button:hover {
      opacity: 0.9;
    }

    .page-tr88app__download-button i {
      font-size: 1.5em;
    }

    /* Features List */
    .page-tr88app__features-list {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 20px;
      margin-top: 30px;
    }

    .page-tr88app__feature-item {
      background-color: #e6f7ff;
      padding: 25px;
      border-left: 5px solid #007bff;
      border-radius: 8px;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
      box-sizing: border-box;
    }

    .page-tr88app__feature-title {
      font-size: 1.3em;
      color: #0d2a4a;
      margin-bottom: 10px;
    }

    .page-tr88app__feature-description {
      color: #555;
    }

    /* FAQ Section */
    .page-tr88app__faq-list {
      margin-top: 30px;
    }

    .page-tr88app__faq-item {
      background-color: #f8f8f8;
      border: 1px solid #eee;
      margin-bottom: 15px;
      border-radius: 8px;
      overflow: hidden;
      box-shadow: 0 2px 5px rgba(0, 0, 0, 0.03);
    }

    .page-tr88app__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 20px;
      background-color: #0d2a4a;
      color: #fff;
      cursor: pointer;
      user-select: none;
      font-size: 1.2em;
      font-weight: bold;
      transition: background-color 0.3s ease;
    }

    .page-tr88app__faq-question:hover {
      background-color: #1a3c60;
    }

    .page-tr88app__faq-question h3 {
      margin: 0;
      flex-grow: 1;
      text-align: left;
      color: #fff;
      pointer-events: none; /* Prevent h3 from blocking click event */
    }

    .page-tr88app__faq-toggle {
      font-size: 1.5em;
      margin-left: 15px;
      transition: transform 0.3s ease;
      pointer-events: none; /* Prevent toggle from blocking click event */
    }

    .page-tr88app__faq-item.active .page-tr88app__faq-toggle {
      transform: rotate(45deg);
    }

    .page-tr88app__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 15px;
      background-color: #fff;
      color: #333;
      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: 1.05em;
      line-height: 1.8;
    }

    .page-tr88app__faq-item.active .page-tr88app__faq-answer {
      max-height: 2000px !important; /* Sufficiently large */
      padding: 20px 15px !important;
      opacity: 1;
    }

    /* Mobile Responsiveness */
    @media (max-width: 768px) {
      .page-tr88app__hero-section {
        padding-top: 10px; /* Ensure space for fixed header */
        padding-bottom: 30px;
      }

      .page-tr88app__hero-title {
        font-size: 2em;
      }

      .page-tr88app__hero-subtitle {
        font-size: 1.1em;
      }

      .page-tr88app__floating-button {
        bottom: 15px;
        right: 15px;
        padding: 12px 20px;
        font-size: 1em;
        max-width: 220px;
      }

      .page-tr88app__section {
        padding: 30px 15px;
        margin-bottom: 20px;
      }

      .page-tr88app__section-title {
        font-size: 1.8em;
        margin-bottom: 25px;
      }

      .page-tr88app__game-grid {
        grid-template-columns: 1fr; /* Single column on mobile */
        gap: 20px;
      }

      .page-tr88app__step-item {
        flex: 1 1 100%;
        max-width: 100%;
        padding: 20px;
      }

      .page-tr88app__download-buttons {
        flex-direction: column;
        gap: 15px;
      }

      .page-tr88app__download-button {
        width: 100%;
        max-width: 300px; /* Limit max width even when full width */
        margin: 0 auto;
      }

      .page-tr88app__features-list {
        grid-template-columns: 1fr; /* Single column on mobile */
      }

      .page-tr88app__faq-question {
        font-size: 1em;
        padding: 15px;
      }

      .page-tr88app__faq-answer {
        font-size: 0.95em;
        padding: 0 10px;
      }

      .page-tr88app__faq-item.active .page-tr88app__faq-answer {
        padding: 15px 10px !important;
      }

      /* List item responsiveness */
      .page-tr88app__steps-container,
      .page-tr88app__features-list {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
        padding: 0 !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
      }

      .page-tr88app__step-item,
      .page-tr88app__feature-item {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
        word-wrap: break-word !important;
        overflow-wrap: break-word !important;
        word-break: break-word !important;
      }

      .page-tr88app__game-card {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
      }
    }

    @media (max-width: 480px) {
      .page-tr88app__hero-title {
        font-size: 1.8em;
      }
      .page-tr88app__hero-subtitle {
        font-size: 1em;
      }
      .page-tr88app__floating-button {
        padding: 10px 18px;
        font-size: 0.9em;
        max-width: 180px;
      }
    }