/* Reset và các biến cơ bản */
    :root {
      --page-b66download-primary-color: #007bff; /* Blue */
      --page-b66download-secondary-color: #6c757d; /* Grey */
      --page-b66download-accent-color: #ffc107; /* Yellow */
      --page-b66download-text-color: #333;
      --page-b66download-background-color: #f8f9fa;
      --page-b66download-white: #fff;
      --page-b66download-dark-grey: #495057;
      --page-b66download-light-grey: #e9ecef;
      --page-b66download-border-radius: 8px;
    }

    body {
      font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
      line-height: 1.6;
      color: var(--page-b66download-text-color);
      background-color: var(--page-b66download-background-color);
      margin: 0;
      padding: 0;
    }

    .page-b66download__container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 20px;
      box-sizing: border-box;
    }

    /* Hero Section */
    .page-b66download__hero-section {
      background: url('[GALLERY:banner:b66_download_hero,mobile_app,banner]') no-repeat center center/cover;
      color: var(--page-b66download-white);
      text-align: center;
      padding: 120px 20px 60px; /* Adjusted padding-top for fixed header */
      position: relative;
      overflow: hidden;
      border-radius: var(--page-b66download-border-radius);
      margin-bottom: 30px;
    }

    .page-b66download__hero-section::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: rgba(0, 0, 0, 0.5);
      z-index: 1;
    }

    .page-b66download__hero-content {
      position: relative;
      z-index: 2;
      max-width: 800px;
      margin: 0 auto;
    }

    .page-b66download__hero-title {
      font-size: 2.8em;
      margin-bottom: 15px;
      line-height: 1.2;
      color: var(--page-b66download-white);
    }

    .page-b66download__hero-subtitle {
      font-size: 1.4em;
      margin-bottom: 30px;
      font-weight: 300;
      color: var(--page-b66download-light-grey);
    }

    .page-b66download__download-button {
      display: inline-block;
      background-color: var(--page-b66download-accent-color);
      color: var(--page-b66download-dark-grey);
      padding: 15px 30px;
      border-radius: 50px;
      text-decoration: none;
      font-weight: bold;
      font-size: 1.1em;
      transition: background-color 0.3s ease, transform 0.2s ease;
      border: none;
      cursor: pointer;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    }

    .page-b66download__download-button:hover {
      background-color: #e0a800;
      transform: translateY(-2px);
    }

    /* Floating Login Button */
    .page-b66download__floating-button-wrapper {
      position: fixed;
      bottom: 20px;
      left: 50%;
      transform: translateX(-50%);
      z-index: 1000;
      width: 90%;
      max-width: 400px;
      box-sizing: border-box;
    }

    .page-b66download__floating-button {
      display: block;
      width: 100%;
      background-color: #dc3545; /* Red for urgency/promo */
      color: var(--page-b66download-white);
      padding: 15px 20px;
      border-radius: 50px;
      text-align: center;
      text-decoration: none;
      font-weight: bold;
      font-size: 1.1em;
      box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
      transition: background-color 0.3s ease, transform 0.2s ease;
      border: none;
      cursor: pointer;
    }

    .page-b66download__floating-button:hover {
      background-color: #c82333;
      transform: translateY(-3px);
    }

    /* General Section Styling */
    .page-b66download__section {
      background-color: var(--page-b66download-white);
      padding: 40px;
      border-radius: var(--page-b66download-border-radius);
      margin-bottom: 30px;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    }

    .page-b66download__section-title {
      font-size: 2em;
      color: var(--page-b66download-primary-color);
      margin-bottom: 25px;
      text-align: center;
      position: relative;
    }

    .page-b66download__section-title::after {
      content: '';
      display: block;
      width: 60px;
      height: 4px;
      background-color: var(--page-b66download-accent-color);
      margin: 10px auto 0;
      border-radius: 2px;
    }

    .page-b66download__text-content p {
      margin-bottom: 15px;
      color: var(--page-b66download-dark-grey);
      font-size: 1.05em;
    }

    .page-b66download__text-content strong {
      color: var(--page-b66download-primary-color);
    }

    /* How to Download Section */
    .page-b66download__steps-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 25px;
      margin-top: 30px;
    }

    .page-b66download__step-item {
      background-color: var(--page-b66download-light-grey);
      padding: 25px;
      border-radius: var(--page-b66download-border-radius);
      text-align: center;
      box-shadow: 0 2px 5px rgba(0, 0, 0, 0.08);
      transition: transform 0.3s ease;
      box-sizing: border-box; /* Crucial for responsive lists */
    }

    .page-b66download__step-item:hover {
      transform: translateY(-5px);
    }

    .page-b66download__step-number {
      font-size: 2.5em;
      color: var(--page-b66download-accent-color);
      font-weight: bold;
      margin-bottom: 10px;
    }

    .page-b66download__step-title {
      font-size: 1.3em;
      color: var(--page-b66download-primary-color);
      margin-bottom: 15px;
    }

    .page-b66download__step-description {
      color: var(--page-b66download-dark-grey);
    }

    .page-b66download__image-wrapper {
      width: 100%;
      max-width: 100%;
      overflow: hidden;
      box-sizing: border-box;
      margin-top: 20px;
    }

    .page-b66download__step-image {
      max-width: 100%;
      height: auto;
      border-radius: var(--page-b66download-border-radius);
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
      display: block; /* Ensure image takes full width of wrapper */
    }

    /* Game Showcase */
    .page-b66download__game-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: 25px;
      margin-top: 30px;
    }

    .page-b66download__game-card {
      background-color: var(--page-b66download-light-grey);
      border-radius: var(--page-b66download-border-radius);
      overflow: hidden;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
      transition: transform 0.3s ease;
      text-align: center;
      box-sizing: border-box; /* Crucial for responsive lists */
    }

    .page-b66download__game-card:hover {
      transform: translateY(-5px);
    }

    .page-b66download__game-image {
      width: 100%;
      height: 200px;
      object-fit: cover;
      display: block;
    }

    .page-b66download__game-info {
      padding: 20px;
    }

    .page-b66download__game-title {
      font-size: 1.3em;
      color: var(--page-b66download-primary-color);
      margin-bottom: 10px;
    }

    .page-b66download__game-description {
      font-size: 0.95em;
      color: var(--page-b66download-dark-grey);
    }

    /* Call to Action Section */
    .page-b66download__cta-section {
      text-align: center;
      background-color: var(--page-b66download-primary-color);
      color: var(--page-b66download-white);
      padding: 50px 20px;
      border-radius: var(--page-b66download-border-radius);
      margin-bottom: 30px;
    }

    .page-b66download__cta-title {
      font-size: 2.2em;
      margin-bottom: 20px;
    }

    .page-b66download__cta-description {
      font-size: 1.2em;
      margin-bottom: 30px;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
    }

    /* FAQ Section */
    .page-b66download__faq-section {
      background-color: var(--page-b66download-white);
      padding: 40px;
      border-radius: var(--page-b66download-border-radius);
      margin-bottom: 30px;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    }

    .page-b66download__faq-item {
      border-bottom: 1px solid var(--page-b66download-light-grey);
      margin-bottom: 10px;
      padding-bottom: 10px;
    }

    .page-b66download__faq-item:last-child {
      border-bottom: none;
      margin-bottom: 0;
      padding-bottom: 0;
    }

    .page-b66download__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      padding: 15px 0;
      font-size: 1.15em;
      color: var(--page-b66download-dark-grey);
      font-weight: bold;
      user-select: none;
      transition: color 0.3s ease;
    }

    .page-b66download__faq-question:hover {
      color: var(--page-b66download-primary-color);
    }

    .page-b66download__faq-question h3 {
      margin: 0;
      flex-grow: 1;
      text-align: left;
      font-size: 1.15em; /* Ensure h3 font size matches */
      color: inherit; /* Inherit color from parent */
      pointer-events: none; /* Prevent h3 from blocking click on parent */
    }

    .page-b66download__faq-toggle {
      font-size: 1.5em;
      line-height: 1;
      margin-left: 15px;
      color: var(--page-b66download-accent-color);
      transition: transform 0.3s ease;
      pointer-events: none; /* Prevent toggle from blocking click on parent */
    }

    .page-b66download__faq-item.active .page-b66download__faq-toggle {
      transform: rotate(45deg); /* Plus sign rotates to form an X or minus */
      color: var(--page-b66download-primary-color);
    }

    .page-b66download__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;
      color: var(--page-b66download-dark-grey);
      font-size: 1em;
      line-height: 1.7;
    }

    .page-b66download__faq-item.active .page-b66download__faq-answer {
      max-height: 2000px !important; /* Sufficiently large value */
      padding: 20px 15px !important;
      opacity: 1;
    }

    /* Responsive Design */
    @media (max-width: 768px) {
      .page-b66download__hero-section {
        padding: 100px 15px 40px; /* Adjust padding-top for smaller screens */
      }

      .page-b66download__hero-title {
        font-size: 2em;
      }

      .page-b66download__hero-subtitle {
        font-size: 1.1em;
      }

      .page-b66download__download-button {
        padding: 12px 25px;
        font-size: 1em;
      }

      .page-b66download__section {
        padding: 25px 15px;
        margin-bottom: 20px;
      }

      .page-b66download__section-title {
        font-size: 1.7em;
        margin-bottom: 20px;
      }

      .page-b66download__text-content p {
        font-size: 0.95em;
      }

      /* List Item Responsive Rules */
      .page-b66download__steps-grid,
      .page-b66download__game-grid {
        grid-template-columns: 1fr; /* Single column on mobile */
        gap: 20px;
      }

      .page-b66download__step-item,
      .page-b66download__game-card {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
        padding: 20px !important; /* Adjust padding for mobile */
        word-wrap: break-word !important; /* Ensure text wraps */
        overflow-wrap: break-word !important;
      }

      .page-b66download__game-image {
        height: 180px;
      }

      .page-b66download__cta-title {
        font-size: 1.8em;
      }

      .page-b66download__cta-description {
        font-size: 1em;
      }

      .page-b66download__faq-question {
        font-size: 1em;
        padding: 12px 0;
      }

      .page-b66download__faq-question h3 {
        font-size: 1em;
      }

      .page-b66download__faq-toggle {
        font-size: 1.3em;
      }

      .page-b66download__faq-answer {
        padding: 15px 10px !important; /* Adjust padding for mobile */
      }

      /* Image responsive */
      .page-b66download__step-image,
      .page-b66download__game-image {
        max-width: 100% !important;
        height: auto !important;
        box-sizing: border-box !important;
      }
      .page-b66download__image-wrapper { /* Ensure image containers are also responsive */
          width: 100% !important;
          max-width: 100% !important;
          overflow: hidden !important;
          box-sizing: border-box !important;
      }
    }

    @media (max-width: 480px) {
      .page-b66download__hero-title {
        font-size: 1.8em;
      }

      .page-b66download__hero-subtitle {
        font-size: 1em;
      }

      .page-b66download__floating-button {
        font-size: 1em;
        padding: 12px 15px;
      }

      .page-b66download__section-title {
        font-size: 1.5em;
      }
    }