:root {
      --page-apptaixiu-primary-color: #007bff;
      --page-apptaixiu-secondary-color: #6c757d;
      --page-apptaixiu-accent-color: #28a745;
      --page-apptaixiu-background-light: #f8f9fa;
      --page-apptaixiu-background-dark: #343a40;
      --page-apptaixiu-text-color: #212529;
      --page-apptaixiu-text-light: #ffffff;
      --page-apptaixiu-border-color: #dee2e6;
    }

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

    .page-apptaixiu__hero-section {
      background-color: var(--page-apptaixiu-background-dark);
      color: var(--page-apptaixiu-text-light);
      padding: 10px 20px 60px 20px; /* Decorative padding-top */
      text-align: center;
      position: relative;
      overflow: hidden;
    }

    .page-apptaixiu__hero-image {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      opacity: 0.3;
      z-index: 0;
    }

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

    .page-apptaixiu__hero-title {
      font-size: 2.8em;
      margin-bottom: 15px;
      color: var(--page-apptaixiu-text-light);
      font-weight: bold;
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    }

    .page-apptaixiu__hero-description {
      font-size: 1.2em;
      margin-bottom: 30px;
      color: var(--page-apptaixiu-text-light);
    }

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

    .page-apptaixiu__download-button:hover {
      background-color: #218838;
    }

    .page-apptaixiu__section {
      padding: 60px 20px;
      max-width: 1200px;
      margin: 0 auto;
    }

    .page-apptaixiu__section--grey {
      background-color: var(--page-apptaixiu-background-light);
    }

    .page-apptaixiu__section-title {
      font-size: 2.2em;
      color: var(--page-apptaixiu-primary-color);
      text-align: center;
      margin-bottom: 40px;
      font-weight: bold;
    }

    .page-apptaixiu__features-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
    }

    .page-apptaixiu__feature-item {
      background-color: var(--page-apptaixiu-text-light);
      border-radius: 8px;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
      padding: 30px;
      text-align: center;
      transition: transform 0.3s ease;
    }

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

    .page-apptaixiu__feature-icon {
      width: 250px; /* Min size */
      height: auto;
      margin-bottom: 20px;
      border-radius: 8px;
      max-width: 100%;
      box-sizing: border-box;
    }

    .page-apptaixiu__feature-title {
      font-size: 1.4em;
      color: var(--page-apptaixiu-primary-color);
      margin-bottom: 10px;
      font-weight: bold;
    }

    .page-apptaixiu__feature-description {
      font-size: 1em;
      color: var(--page-apptaixiu-secondary-color);
    }

    .page-apptaixiu__how-to-section {
      text-align: center;
    }

    .page-apptaixiu__how-to-steps {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 30px;
      margin-top: 40px;
    }

    .page-apptaixiu__step-item {
      background-color: var(--page-apptaixiu-text-light);
      border-radius: 8px;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
      padding: 30px;
      width: calc(33% - 20px); /* Adjust for gap */
      min-width: 280px;
      box-sizing: border-box;
      text-align: center;
    }

    .page-apptaixiu__step-number {
      font-size: 2em;
      color: var(--page-apptaixiu-primary-color);
      font-weight: bold;
      margin-bottom: 15px;
      display: block;
    }

    .page-apptaixiu__step-image {
      width: 250px; /* Min size */
      height: auto;
      margin-bottom: 20px;
      border-radius: 8px;
      max-width: 100%;
      box-sizing: border-box;
    }

    .page-apptaixiu__step-title {
      font-size: 1.3em;
      color: var(--page-apptaixiu-primary-color);
      margin-bottom: 10px;
      font-weight: bold;
    }

    .page-apptaixiu__step-description {
      font-size: 1em;
      color: var(--page-apptaixiu-secondary-color);
    }

    .page-apptaixiu__cta-section {
      background-color: var(--page-apptaixiu-primary-color);
      color: var(--page-apptaixiu-text-light);
      text-align: center;
      padding: 60px 20px;
    }

    .page-apptaixiu__cta-title {
      font-size: 2.5em;
      margin-bottom: 20px;
      font-weight: bold;
    }

    .page-apptaixiu__cta-description {
      font-size: 1.2em;
      margin-bottom: 40px;
    }

    .page-apptaixiu__faq-section {
      background-color: var(--page-apptaixiu-background-light);
      padding: 60px 20px;
      max-width: 900px;
      margin: 0 auto;
    }

    .page-apptaixiu__faq-list {
      list-style: none;
      padding: 0;
    }

    .page-apptaixiu__faq-item {
      background-color: var(--page-apptaixiu-text-light);
      border: 1px solid var(--page-apptaixiu-border-color);
      border-radius: 8px;
      margin-bottom: 15px;
      overflow: hidden;
      box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
    }

    .page-apptaixiu__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 20px 25px;
      cursor: pointer;
      background-color: #e9ecef;
      color: var(--page-apptaixiu-text-color);
      font-size: 1.1em;
      font-weight: bold;
      transition: background-color 0.3s ease;
      user-select: none;
    }

    .page-apptaixiu__faq-question h3 {
      margin: 0;
      font-size: 1.1em;
      color: var(--page-apptaixiu-primary-color);
      pointer-events: none; /* Prevent h3 from blocking click */
    }

    .page-apptaixiu__faq-toggle {
      font-size: 1.5em;
      font-weight: bold;
      color: var(--page-apptaixiu-primary-color);
      transition: transform 0.3s ease;
      pointer-events: none; /* Prevent toggle icon from blocking click */
    }

    .page-apptaixiu__faq-item.active .page-apptaixiu__faq-toggle {
      transform: rotate(45deg); /* Change + to X or similar, or just rotate */
    }

    .page-apptaixiu__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 25px;
      transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
      opacity: 0;
      color: var(--page-apptaixiu-secondary-color);
    }

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

    /* Responsive adjustments */
    @media (max-width: 768px) {
      .page-apptaixiu__hero-title {
        font-size: 2em;
      }

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

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

      .page-apptaixiu__section {
        padding: 40px 15px;
      }

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

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

      .page-apptaixiu__feature-item {
        padding: 20px;
      }

      .page-apptaixiu__feature-icon {
        width: 100% !important;
        max-width: 100% !important;
        height: auto !important;
        box-sizing: border-box !important;
      }

      .page-apptaixiu__how-to-steps {
        flex-direction: column;
        align-items: center;
      }

      .page-apptaixiu__step-item {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
        padding: 20px 15px !important;
      }

      .page-apptaixiu__step-image {
        width: 100% !important;
        max-width: 100% !important;
        height: auto !important;
        box-sizing: border-box !important;
      }

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

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

      .page-apptaixiu__faq-question {
        padding: 15px 20px;
        font-size: 1em;
      }
      
      .page-apptaixiu__faq-question h3 {
        font-size: 1em;
      }

      .page-apptaixiu__faq-answer {
        padding: 0 20px;
      }

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

    /* Ensure all images are responsive */
    .page-apptaixiu img {
      max-width: 100% !important;
      height: auto !important;
      box-sizing: border-box !important;
      overflow: hidden !important;
    }