.page-about {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  color: #333333; /* Default dark text on light body background */
  background-color: #ffffff;
}

.page-about__container {
  max-width: 1150px;
  margin: 0 auto;
  padding: 0 20px;
  box-sizing: border-box;
}

.page-about__top-section {
  background-color: #f8f8f8;
  padding-top: 10px; /* Small top padding, relying on body padding-top for header offset */
  padding-bottom: 40px;
  text-align: center;
}

.page-about__main-title {
  font-size: 2.8em;
  color: #26A9E0;
  margin-bottom: 15px;
  font-weight: bold;
  line-height: 1.2;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.page-about__description {
  font-size: 1.1em;
  color: #555555;
  margin-bottom: 30px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.page-about__top-cta {
  display: flex;
  gap: 15px;
  justify-content: center;
  flex-wrap: wrap;
}

.page-about__btn {
  display: inline-block;
  padding: 14px 28px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: bold;
  transition: background-color 0.3s ease, color 0.3s ease;
  max-width: 100%;
  box-sizing: border-box;
  white-space: normal;
  word-wrap: break-word;
  text-align: center;
}

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

.page-about__btn-primary:hover {
  background-color: #1e87c0;
  border-color: #1e87c0;
}

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

.page-about__btn-secondary:hover {
  background-color: #e0f2f7;
  color: #26A9E0;
}

.page-about__section {
  padding: 60px 0;
  border-bottom: 1px solid #eeeeee;
}

.page-about__section:last-of-type {
  border-bottom: none;
}

.page-about__section-title {
  font-size: 2.2em;
  color: #26A9E0;
  text-align: center;
  margin-bottom: 40px;
  font-weight: bold;
}

.page-about__sub-title {
  font-size: 1.6em;
  color: #333333;
  margin-top: 30px;
  margin-bottom: 15px;
  font-weight: bold;
}

.page-about__dark-bg {
  background-color: #26A9E0;
  color: #ffffff;
}

.page-about__dark-bg .page-about__section-title,
.page-about__dark-bg .page-about__sub-title {
  color: #ffffff;
}

.page-about__dark-bg .page-about__list-item {
  color: #f0f0f0;
}

.page-about__light-bg {
  background-color: #f8f8f8;
}

.page-about__article-wrap p {
  margin-bottom: 1em;
  font-size: 1.05em;
  color: #333333;
}

.page-about__article-wrap strong {
  font-weight: bold;
  color: #26A9E0;
}

.page-about__list {
  list-style-type: disc;
  margin-left: 25px;
  margin-bottom: 20px;
}

.page-about__list-item {
  margin-bottom: 10px;
  color: #333333;
}

.page-about__image-figure {
  margin: 40px auto;
  max-width: 800px;
  text-align: center;
}

.page-about__image {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.page-about__image-caption {
  font-style: italic;
  font-size: 0.9em;
  color: #777777;
  margin-top: 10px;
}

.page-about__grid-3-columns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-top: 40px;
  margin-bottom: 40px;
}

.page-about__card {
  background-color: #ffffff;
  border-radius: 12px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
  padding: 30px;
  text-align: center;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  color: #333333;
}

.page-about__card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.page-about__card-title {
  font-size: 1.5em;
  color: #26A9E0;
  margin-bottom: 15px;
  font-weight: bold;
}

.page-about__product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
  margin-top: 40px;
  margin-bottom: 40px;
}

.page-about__product-card {
  background-color: #ffffff;
  border-radius: 12px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
  padding: 20px;
  text-align: center;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  overflow: hidden;
}

.page-about__product-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.page-about__product-image {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: 8px;
  margin-bottom: 15px;
}

.page-about__product-title {
  font-size: 1.4em;
  margin-bottom: 10px;
  font-weight: bold;
}

.page-about__product-link {
  color: #26A9E0;
  text-decoration: none;
}

.page-about__product-link:hover {
  text-decoration: underline;
}

.page-about__button-group {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 30px;
  flex-wrap: wrap;
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
  overflow: hidden;
}

.page-about__commitment-list {
  list-style-type: none;
  margin-left: 0;
  padding-left: 0;
}

.page-about__commitment-list .page-about__list-item {
  position: relative;
  padding-left: 30px;
  margin-bottom: 15px;
  font-size: 1.1em;
}

.page-about__commitment-list .page-about__list-item::before {
  content: '✔';
  position: absolute;
  left: 0;
  color: #26A9E0;
  font-weight: bold;
}

.page-about__steps-list {
  list-style-type: none;
  padding-left: 0;
  margin-top: 30px;
  margin-bottom: 40px;
}

.page-about__step-item {
  background-color: #ffffff;
  border: 1px solid #e0e0e0;
  border-radius: 8px;
  padding: 25px;
  margin-bottom: 20px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.page-about__step-title {
  font-size: 1.4em;
  color: #26A9E0;
  margin-bottom: 10px;
  font-weight: bold;
}

.page-about__contact-methods {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-top: 40px;
  margin-bottom: 40px;
}

.page-about__contact-card {
  background-color: #ffffff;
  border-radius: 12px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
  padding: 30px;
  text-align: center;
  color: #333333;
}

.page-about__contact-card .page-about__card-title {
  color: #26A9E0;
}

.page-about__contact-card .page-about__btn {
  margin-top: 20px;
}

.page-about__faq-list {
  margin-top: 40px;
}

.page-about__faq-question {
  font-size: 1.3em;
  color: #26A9E0;
  margin-top: 25px;
  margin-bottom: 10px;
  font-weight: bold;
  cursor: pointer;
  border-bottom: 1px solid #eee;
  padding-bottom: 10px;
}

.page-about__faq-answer {
  font-size: 1.05em;
  color: #555555;
  margin-bottom: 15px;
  padding-top: 5px;
}

.page-about__bottom-cta {
  text-align: center;
  margin-top: 50px;
}

/* -------------------------------------------------------------------------- */
/*                            Responsive Styles                               */
/* -------------------------------------------------------------------------- */

@media (max-width: 1024px) {
  .page-about__main-title {
    font-size: 2.5em;
  }

  .page-about__description {
    font-size: 1em;
  }

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

  .page-about__sub-title {
    font-size: 1.4em;
  }

  .page-about__btn {
    padding: 12px 24px;
  }
}

@media (max-width: 768px) {
  /* 1. 顶区标题 + 双 CTA */
  .page-about__top-section {
    padding-top: 10px !important; /* Ensure small top padding */
    padding-bottom: 30px;
  }

  .page-about__main-title {
    font-size: 2em !important;
    line-height: 1.3 !important;
    padding: 0 15px;
  }

  .page-about__description {
    font-size: 0.95em !important;
    padding: 0 15px;
  }

  .page-about__top-cta {
    flex-direction: column !important; /* Stack buttons vertically */
    gap: 10px;
    padding: 0 15px;
  }

  .page-about__btn {
    width: 100% !important;
    max-width: 100% !important;
    padding-left: 15px !important;
    padding-right: 15px !important;
    box-sizing: border-box !important;
    white-space: normal !important;
    word-wrap: break-word !important;
  }

  /* 2. 单栏长文容器 */
  .page-about__container,
  .page-about__article-wrap,
  .page-about__card,
  .page-about__product-card,
  .page-about__step-item,
  .page-about__contact-card {
    padding-left: 15px !important;
    padding-right: 15px !important;
    width: 100% !important;
    max-width: 100% !important;
    box-sizing: border-box !important;
  }

  .page-about__section {
    padding: 40px 0;
  }

  .page-about__section-title {
    font-size: 1.8em !important;
    margin-bottom: 30px;
  }

  .page-about__sub-title {
    font-size: 1.2em !important;
  }

  .page-about__article-wrap p,
  .page-about__list-item,
  .page-about__faq-answer {
    font-size: 1em !important;
  }

  .page-about__grid-3-columns,
  .page-about__product-grid,
  .page-about__contact-methods {
    grid-template-columns: 1fr !important; /* Single column layout */
    gap: 20px;
  }

  /* 3. 通用图片与 figure */
  .page-about img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
    display: block;
  }

  .page-about__image-figure {
    margin: 30px auto;
  }

  .page-about__image-caption {
    font-size: 0.85em !important;
  }

  /* 4. 按钮与按钮容器 */
  .page-about__button-group {
    flex-direction: column !important;
    gap: 10px;
    padding: 0 15px !important;
  }

  .page-about__button-group .page-about__btn {
    width: 100% !important;
    max-width: 100% !important;
  }

  /* 5. 注册教程与 FAQ 区块 */
  .page-about__step-item {
    padding: 20px !important;
  }

  .page-about__step-title {
    font-size: 1.2em !important;
  }

  .page-about__faq-question {
    font-size: 1.1em !important;
    margin-top: 20px;
  }

  .page-about__bottom-cta {
    padding: 0 15px !important;
  }

  .page-about__bottom-cta .page-about__btn {
    width: 100% !important;
    max-width: 100% !important;
  }
}