.page-about {
  font-family: Arial, sans-serif;
  color: #333333; /* Default text color for light body background */
  background-color: #ffffff; /* Default body background */
}

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

.page-about__article-wrap {
  max-width: 900px; /* Adjusted for better readability in main content */
  margin: 0 auto;
  padding: 0 20px;
}

.page-about__top-section {
  padding-top: 10px; /* Small top padding as body handles header offset */
  padding-bottom: 40px;
  background-color: #26A9E0; /* Brand primary color */
  color: #FFFFFF;
  text-align: center;
}

.page-about__main-title {
  font-size: clamp(28px, 4vw, 48px); /* Responsive font size */
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 15px;
  color: #FFFFFF;
}

.page-about__description {
  font-size: 18px;
  line-height: 1.6;
  max-width: 800px;
  margin: 0 auto 30px auto;
  color: #FFFFFF;
}

.page-about__cta-buttons {
  display: flex;
  justify-content: center;
  gap: 15px;
  flex-wrap: wrap; /* Allow wrapping on smaller screens */
}

.page-about__btn {
  display: inline-block;
  padding: 12px 25px;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 700;
  text-decoration: none;
  transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease;
  max-width: 100%; /* Ensure button fits container */
  box-sizing: border-box;
  white-space: normal; /* Allow text wrapping */
  word-wrap: break-word; /* Allow text wrapping */
}

.page-about__btn-primary {
  background-color: #EA7C07; /* Login color for primary action */
  color: #FFFFFF;
  border: 2px solid #EA7C07;
}

.page-about__btn-primary:hover {
  background-color: #d16b06;
  border-color: #d16b06;
}

.page-about__btn-secondary {
  background-color: #FFFFFF;
  color: #26A9E0;
  border: 2px solid #26A9E0;
}

.page-about__btn-secondary:hover {
  background-color: #f0f8ff;
  color: #1e87c0;
}

.page-about__content-section {
  padding: 50px 0;
}

.page-about__section-heading {
  font-size: clamp(24px, 3.5vw, 36px);
  font-weight: 700;
  color: #26A9E0;
  text-align: center;
  margin-bottom: 30px;
  margin-top: 40px;
}

.page-about__sub-heading {
  font-size: clamp(20px, 2.5vw, 28px);
  font-weight: 600;
  color: #333333;
  margin-top: 30px;
  margin-bottom: 15px;
  text-align: left;
}

.page-about__article-wrap p {
  font-size: 16px;
  line-height: 1.7;
  margin-bottom: 20px;
  color: #333333;
}

.page-about__figure {
  margin: 30px auto;
  max-width: 100%;
  text-align: center;
}

.page-about__figure img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: 8px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  min-width: 200px; /* Enforce min size */
  min-height: 200px; /* Enforce min size */
  margin: 0 auto;
}

.page-about__figcaption {
  font-size: 14px;
  color: #666666;
  margin-top: 10px;
  font-style: italic;
}

.page-about__promo-box {
  background-color: #f0f8ff;
  border: 1px solid #26A9E0;
  border-radius: 10px;
  padding: 30px;
  margin: 40px 0;
  text-align: center;
}

.page-about__promo-title {
  font-size: clamp(22px, 3vw, 30px);
  color: #26A9E0;
  margin-bottom: 15px;
  font-weight: 700;
}

.page-about__promo-box p {
  font-size: 16px;
  line-height: 1.6;
  margin-bottom: 20px;
  color: #333333;
}

.page-about__register-steps {
  list-style: none;
  padding: 0;
  margin-bottom: 40px;
}

.page-about__step-item {
  background-color: #f9f9f9;
  border-left: 5px solid #26A9E0;
  padding: 20px;
  margin-bottom: 15px;
  border-radius: 5px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}

.page-about__step-title {
  font-size: 20px;
  color: #26A9E0;
  margin-top: 0;
  margin-bottom: 10px;
  font-weight: 600;
}

.page-about__step-item p {
  font-size: 15px;
  line-height: 1.6;
  color: #555555;
  margin-bottom: 0;
}

.page-about__cta-box {
  text-align: center;
  margin-top: 40px;
  margin-bottom: 50px;
}

.page-about__cta-box p {
  font-size: 18px;
  margin-top: 20px;
  color: #333333;
}

.page-about__app-download-cta {
  text-align: center;
  margin-top: 40px;
  margin-bottom: 50px;
}

.page-about__app-download-cta p {
  font-size: 18px;
  margin-top: 20px;
  color: #333333;
}

.page-about__final-cta {
  text-align: center;
  padding-top: 30px;
  padding-bottom: 50px;
}


/* --- Responsive Styles --- */
@media (max-width: 1024px) {
  .page-about__container {
    padding: 0 15px;
  }
  .page-about__article-wrap {
    padding: 0 15px;
  }
}

@media (max-width: 768px) {
  /* 1. 顶区标题 + 双 CTA */
  .page-about__top-section {
    padding-top: 10px !important; /* Small top padding for mobile */
    padding-bottom: 30px;
  }
  .page-about__main-title {
    font-size: 28px;
    margin-bottom: 10px;
  }
  .page-about__description {
    font-size: 16px;
    margin-bottom: 20px;
    padding: 0 10px;
  }
  .page-about__cta-buttons {
    flex-direction: column; /* Stack buttons vertically */
    gap: 10px;
    padding: 0 15px;
  }
  .page-about__btn {
    width: 100% !important;
    max-width: 100% !important;
    padding: 12px 15px;
    font-size: 15px;
    box-sizing: border-box !important;
    white-space: normal !important;
    word-wrap: break-word !important;
  }

  /* 2. 单栏长文容器 */
  .page-about__article-wrap {
    padding: 0 15px !important;
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }
  .page-about__content-section {
    padding: 30px 0;
  }
  .page-about__section-heading {
    font-size: 24px;
    margin-bottom: 20px;
    margin-top: 30px;
    padding: 0 10px;
  }
  .page-about__sub-heading {
    font-size: 20px;
    margin-top: 25px;
    margin-bottom: 10px;
    padding: 0 10px;
  }
  .page-about__article-wrap p {
    font-size: 15px;
    line-height: 1.6;
    margin-bottom: 15px;
    padding: 0 10px;
  }
  .page-about__promo-box {
    padding: 20px;
    margin: 30px 15px;
  }
  .page-about__promo-title {
    font-size: 20px;
    margin-bottom: 10px;
  }
  .page-about__promo-box p {
    font-size: 15px;
    margin-bottom: 15px;
  }

  /* 3. 通用图片与 figure */
  .page-about img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
    display: block !important;
    min-width: 200px !important; /* Ensure min size */
    min-height: 200px !important; /* Ensure min size */
  }
  .page-about__figure {
    margin: 20px auto;
    padding: 0 15px;
  }
  .page-about__figcaption {
    font-size: 13px;
    padding: 0 10px;
  }
  .page-about__container,
  .page-about__section,
  .page-about__card {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
  }

  /* 4. 按钮与按钮容器 (already handled by .page-about__cta-buttons and .page-about__btn) */
  .page-about__cta-box,
  .page-about__app-download-cta,
  .page-about__final-cta {
    margin-top: 30px;
    margin-bottom: 30px;
    padding: 0 15px;
  }
  .page-about__cta-box p,
  .page-about__app-download-cta p {
    font-size: 16px;
    margin-top: 15px;
    padding: 0 10px;
  }
  .page-about__btn-secondary {
    width: 100% !important;
    max-width: 100% !important;
    margin: 0 auto;
    display: block;
    box-sizing: border-box !important;
    white-space: normal !important;
    word-wrap: break-word !important;
  }

  /* 5. 注册教程 (register-steps) */
  .page-about__register-steps {
    margin-bottom: 30px;
    padding: 0 15px;
  }
  .page-about__step-item {
    padding: 15px;
    margin-bottom: 10px;
  }
  .page-about__step-title {
    font-size: 18px;
    margin-bottom: 8px;
  }
  .page-about__step-item p {
    font-size: 14px;
  }
}