:root {
      --page-yy777-app-apk-primary-color: #007bff; /* Blue */
      --page-yy777-app-apk-secondary-color: #6c757d; /* Gray */
      --page-yy777-app-apk-accent-color: #28a745; /* Green */
      --page-yy777-app-apk-text-color: #333333;
      --page-yy777-app-apk-light-bg: #f8f9fa;
      --page-yy777-app-apk-white: #ffffff;
      --page-yy777-app-apk-border-color: #e0e0e0;
    }

    .page-yy777-app-apk {
      font-family: 'Arial', sans-serif;
      line-height: 1.6;
      color: var(--page-yy777-app-apk-text-color);
      padding-bottom: 40px;
    }

    .page-yy777-app-apk__hero-section {
      background: linear-gradient(135deg, var(--page-yy777-app-apk-primary-color), #0056b3);
      color: var(--page-yy777-app-apk-white);
      padding: 10px 20px 60px; /* 10px for header offset, then content padding */
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      gap: 30px;
      position: relative;
      overflow: hidden;
    }

    .page-yy777-app-apk__hero-content {
      max-width: 900px;
      z-index: 1;
    }

    .page-yy777-app-apk__hero-title {
      font-size: 2.8em;
      margin-bottom: 15px;
      color: var(--page-yy777-app-apk-white);
      word-wrap: break-word;
      overflow-wrap: break-word;
    }

    .page-yy777-app-apk__hero-description {
      font-size: 1.2em;
      margin-bottom: 30px;
      word-wrap: break-word;
      overflow-wrap: break-word;
    }

    .page-yy777-app-apk__download-button {
      background-color: var(--page-yy777-app-apk-accent-color);
      color: var(--page-yy777-app-apk-white);
      padding: 15px 30px;
      font-size: 1.1em;
      border: none;
      border-radius: 5px;
      cursor: pointer;
      transition: background-color 0.3s ease;
      text-decoration: none;
      display: inline-block;
      margin-top: 10px;
      word-wrap: break-word;
      overflow-wrap: break-word;
    }

    .page-yy777-app-apk__download-button:hover {
      background-color: #218838; /* Darker green */
    }

    .page-yy777-app-apk__download-button--small {
      padding: 10px 20px;
      font-size: 1em;
    }

    .page-yy777-app-apk__download-button--large {
      padding: 18px 35px;
      font-size: 1.2em;
    }

    .page-yy777-app-apk__compatibility {
      font-size: 0.9em;
      margin-top: 20px;
      opacity: 0.9;
    }

    .page-yy777-app-apk__hero-image-container {
      width: 100%;
      max-width: 500px;
      margin-top: 30px;
      box-sizing: border-box;
      overflow: hidden;
    }

    .page-yy777-app-apk__hero-image {
      width: 100%;
      height: auto;
      display: block;
      border-radius: 10px;
      box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
    }

    .page-yy777-app-apk__section-title {
      font-size: 2em;
      color: var(--page-yy777-app-apk-primary-color);
      text-align: center;
      margin: 60px 20px 40px;
      word-wrap: break-word;
      overflow-wrap: break-word;
    }

    .page-yy777-app-apk__highlight {
      color: var(--page-yy777-app-apk-accent-color);
    }

    .page-yy777-app-apk__strong-keyword {
        font-weight: bold;
        color: var(--page-yy777-app-apk-primary-color);
    }

    .page-yy777-app-apk__features-section {
      padding: 40px 20px;
      background-color: var(--page-yy777-app-apk-light-bg);
      text-align: center;
    }

    .page-yy777-app-apk__features-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
      max-width: 1200px;
      margin: 0 auto;
    }

    .page-yy777-app-apk__feature-item {
      background-color: var(--page-yy777-app-apk-white);
      padding: 30px;
      border-radius: 8px;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
      transition: transform 0.3s ease;
      display: flex;
      flex-direction: column;
      align-items: center;
      box-sizing: border-box;
    }

    .page-yy777-app-apk__feature-item:hover {
      transform: translateY(-5px);
    }

    .page-yy777-app-apk__feature-icon {
      width: 250px; /* Min size 200x200, choosing a slightly larger one */
      height: auto;
      max-width: 100%;
      margin-bottom: 20px;
      display: block;
      border-radius: 8px;
      box-sizing: border-box;
      overflow: hidden;
    }

    .page-yy777-app-apk__feature-title {
      font-size: 1.5em;
      color: var(--page-yy777-app-apk-primary-color);
      margin-bottom: 15px;
      word-wrap: break-word;
      overflow-wrap: break-word;
    }

    .page-yy777-app-apk__feature-description {
      font-size: 1em;
      color: var(--page-yy777-app-apk-text-color);
      word-wrap: break-word;
      overflow-wrap: break-word;
    }

    .page-yy777-app-apk__download-guide-section {
      padding: 60px 20px;
      background-color: var(--page-yy777-app-apk-white);
    }

    .page-yy777-app-apk__guide-steps {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 40px;
      max-width: 1200px;
      margin: 0 auto;
    }

    .page-yy777-app-apk__guide-step {
      text-align: center;
      background-color: var(--page-yy777-app-apk-light-bg);
      padding: 30px;
      border-radius: 8px;
      box-shadow: 0 2px 5px rgba(0, 0, 0, 0.03);
      box-sizing: border-box;
    }

    .page-yy777-app-apk__step-number {
      background-color: var(--page-yy777-app-apk-primary-color);
      color: var(--page-yy777-app-apk-white);
      width: 50px;
      height: 50px;
      border-radius: 50%;
      display: flex;
      justify-content: center;
      align-items: center;
      font-size: 1.5em;
      font-weight: bold;
      margin: 0 auto 20px;
    }

    .page-yy777-app-apk__step-title {
      font-size: 1.4em;
      color: var(--page-yy777-app-apk-primary-color);
      margin-bottom: 15px;
      word-wrap: break-word;
      overflow-wrap: break-word;
    }

    .page-yy777-app-apk__step-description {
      font-size: 1em;
      margin-bottom: 20px;
      word-wrap: break-word;
      overflow-wrap: break-word;
    }

    .page-yy777-app-apk__step-image {
      width: 100%;
      height: auto;
      max-width: 400px;
      display: block;
      margin: 20px auto 0;
      border-radius: 5px;
      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
      box-sizing: border-box;
      overflow: hidden;
    }

    .page-yy777-app-apk__faq-section {
      padding: 60px 20px;
      background-color: var(--page-yy777-app-apk-light-bg);
    }

    .page-yy777-app-apk__faq-list {
      max-width: 900px;
      margin: 0 auto;
    }

    .page-yy777-app-apk__faq-item {
      background-color: var(--page-yy777-app-apk-white);
      border: 1px solid var(--page-yy777-app-apk-border-color);
      border-radius: 8px;
      margin-bottom: 15px;
      overflow: hidden;
      box-sizing: border-box;
    }

    .page-yy777-app-apk__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 20px 25px;
      cursor: pointer;
      user-select: none;
      background-color: var(--page-yy777-app-apk-white);
      transition: background-color 0.3s ease;
      box-sizing: border-box;
    }

    .page-yy777-app-apk__faq-question:hover {
      background-color: #f0f0f0;
    }

    .page-yy777-app-apk__faq-title {
      font-size: 1.2em;
      color: var(--page-yy777-app-apk-text-color);
      margin: 0;
      pointer-events: none; /* Prevents text selection from interfering with click */
      flex-grow: 1;
      text-align: left;
      word-wrap: break-word;
      overflow-wrap: break-word;
    }

    .page-yy777-app-apk__faq-toggle {
      font-size: 1.8em;
      color: var(--page-yy777-app-apk-primary-color);
      margin-left: 15px;
      transition: transform 0.3s ease;
      pointer-events: none; /* Prevents toggle icon from interfering with click */
      flex-shrink: 0;
    }

    .page-yy777-app-apk__faq-item.active .page-yy777-app-apk__faq-toggle {
      transform: rotate(45deg); /* Changes '+' to 'x' or '-' */
    }

    .page-yy777-app-apk__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 25px;
      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-yy777-app-apk-secondary-color);
      font-size: 0.95em;
      text-align: left;
      box-sizing: border-box;
    }

    .page-yy777-app-apk__faq-item.active .page-yy777-app-apk__faq-answer {
      max-height: 2000px !important; /* Sufficiently large to contain content */
      padding: 20px 25px !important;
      opacity: 1;
    }

    .page-yy777-app-apk__faq-answer p {
      margin: 0;
      word-wrap: break-word;
      overflow-wrap: break-word;
    }

    .page-yy777-app-apk__cta-section {
      background: linear-gradient(135deg, #0056b3, var(--page-yy777-app-apk-primary-color));
      color: var(--page-yy777-app-apk-white);
      padding: 60px 20px;
      text-align: center;
    }

    .page-yy777-app-apk__cta-description {
      font-size: 1.2em;
      margin-bottom: 30px;
      word-wrap: break-word;
      overflow-wrap: break-word;
    }

    .page-yy777-app-apk__promo-link {
      color: var(--page-yy777-app-apk-white);
      text-decoration: underline;
      font-weight: bold;
      transition: color 0.3s ease;
      word-wrap: break-word;
      overflow-wrap: break-word;
    }

    .page-yy777-app-apk__promo-link:hover {
      color: var(--page-yy777-app-apk-accent-color);
    }

    /* Responsive adjustments */
    @media (max-width: 768px) {
      .page-yy777-app-apk__hero-section {
        flex-direction: column;
        padding-top: 10px;
        padding-bottom: 40px;
      }

      .page-yy777-app-apk__hero-title {
        font-size: 2em;
      }

      .page-yy777-app-apk__hero-description,
      .page-yy777-app-apk__cta-description {
        font-size: 1em;
      }

      .page-yy777-app-apk__download-button {
        padding: 12px 25px;
        font-size: 1em;
      }

      .page-yy777-app-apk__download-button--large {
        padding: 15px 30px;
        font-size: 1.1em;
      }

      .page-yy777-app-apk__section-title {
        font-size: 1.8em;
        margin: 40px 15px 30px;
      }

      .page-yy777-app-apk__features-grid,
      .page-yy777-app-apk__guide-steps {
        grid-template-columns: 1fr;
        padding: 0 15px;
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
      }

      .page-yy777-app-apk__feature-item,
      .page-yy777-app-apk__guide-step,
      .page-yy777-app-apk__faq-item {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
      }

      .page-yy777-app-apk__feature-item {
        padding: 20px;
      }

      .page-yy777-app-apk__feature-icon {
        width: 200px; /* Ensure min 200px even on mobile */
        max-width: 100%;
      }

      .page-yy777-app-apk__feature-title,
      .page-yy777-app-apk__step-title {
        font-size: 1.3em;
      }

      .page-yy777-app-apk__faq-question {
        padding: 15px 20px;
      }

      .page-yy777-app-apk__faq-title {
        font-size: 1.1em;
      }

      .page-yy777-app-apk__faq-answer {
        padding: 0 20px;
      }

      .page-yy777-app-apk__faq-item.active .page-yy777-app-apk__faq-answer {
        padding: 15px 20px !important;
      }

      .page-yy777-app-apk__faq-toggle {
        font-size: 1.5em;
      }

      .page-yy777-app-apk__guide-step {
        padding: 20px;
      }
    }

    @media (max-width: 480px) {
      .page-yy777-app-apk__hero-title {
        font-size: 1.8em;
      }
      .page-yy777-app-apk__section-title {
        font-size: 1.6em;
      }
      .page-yy777-app-apk__faq-title {
        font-size: 1em;
      }
      .page-yy777-app-apk__faq-toggle {
        font-size: 1.3em;
      }
    }