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

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

.page-about__hero-image-wrapper {
  max-width: 100%;
  overflow: hidden;
  margin-bottom: 20px;
}

.page-about__hero-image {
  width: 100%;
  height: auto;
  display: block;
}

.page-about__hero-content {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 20px;
}

.page-about__main-title {
  font-size: clamp(2em, 4vw, 2.8em);
  font-weight: 700;
  color: #017439;
  margin-bottom: 15px;
  line-height: 1.2;
}

.page-about__intro-text {
  font-size: 1.1em;
  margin-bottom: 30px;
  color: #555555;
}

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

.page-about__btn {
  display: inline-block;
  padding: 12px 25px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 700;
  transition: all 0.3s ease;
  cursor: pointer;
  max-width: 100%;
  box-sizing: border-box;
  white-space: normal;
  word-wrap: break-word;
  text-align: center;
}

.page-about__btn-primary {
  background-color: #017439;
  color: #ffffff;
  border: 2px solid #017439;
}

.page-about__btn-primary:hover {
  background-color: #005a2d;
  border-color: #005a2d;
}

.page-about__btn-secondary {
  background-color: #ffffff;
  color: #017439;
  border: 2px solid #017439;
}

.page-about__btn-secondary:hover {
  background-color: #f0f0f0;
  color: #005a2d;
}

.page-about__btn-register {
  background-color: #C30808;
  color: #FFFF00;
  border-color: #C30808;
}

.page-about__btn-register:hover {
  background-color: #a00606;
  border-color: #a00606;
}

.page-about__btn-login {
  background-color: #C30808;
  color: #FFFF00;
  border-color: #C30808;
}

.page-about__btn-login:hover {
  background-color: #a00606;
  border-color: #a00606;
}

.page-about__section {
  padding: 40px 0;
  background-color: #ffffff;
}

.page-about__article-wrap {
  max-width: 1150px;
  margin: 0 auto;
  padding: 0 20px;
}

.page-about__heading {
  font-size: 2.2em;
  color: #017439;
  margin-bottom: 25px;
  text-align: center;
  font-weight: 700;
}

.page-about__sub-heading {
  font-size: 1.6em;
  color: #017439;
  margin-top: 35px;
  margin-bottom: 15px;
  font-weight: 600;
}

.page-about p {
  margin-bottom: 15px;
  font-size: 1.05em;
  color: #333333;
}

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

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

.page-about__figure {
  margin: 25px 0;
  text-align: center;
}

.page-about__img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto;
  border-radius: 8px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.page-about__figcaption {
  font-size: 0.9em;
  color: #666666;
  margin-top: 10px;
}

.page-about__promo-box {
  background-color: #017439;
  color: #ffffff;
  padding: 30px;
  border-radius: 10px;
  margin: 40px 0;
  text-align: center;
}

.page-about__promo-title {
  font-size: 1.8em;
  margin-bottom: 15px;
  color: #ffffff;
}

.page-about__promo-box p {
  color: #f0f0f0;
  margin-bottom: 20px;
}

.page-about__promo-box a {
  color: #FFFF00;
  text-decoration: underline;
}

.page-about__promo-box a:hover {
  color: #ffffff;
}

.page-about__contact-buttons {
  margin-top: 30px;
  margin-bottom: 40px;
}

.page-about__final-cta {
  margin-top: 50px;
  margin-bottom: 20px;
}

/* Responsive Styles */
@media (max-width: 1024px) {
  .page-about__main-title {
    font-size: clamp(2em, 5vw, 2.5em);
  }
  .page-about__heading {
    font-size: 2em;
  }
  .page-about__sub-heading {
    font-size: 1.4em;
  }
  .page-about__article-wrap {
    padding: 0 15px;
  }
}

@media (max-width: 768px) {
  /* 顶区标题 + 双 CTA */
  .page-about__hero-section {
    padding-top: 10px !important; /* Fixed header spacing */
    padding-bottom: 30px;
  }
  .page-about__main-title {
    font-size: clamp(1.8em, 7vw, 2.2em) !important;
    margin-bottom: 10px;
  }
  .page-about__intro-text {
    font-size: 1em;
    margin-bottom: 20px;
  }
  .page-about__cta-buttons {
    flex-direction: column;
    gap: 10px;
    padding: 0 15px;
  }
  .page-about__btn {
    width: 100% !important;
    max-width: 100% !important;
    padding-left: 15px;
    padding-right: 15px;
    white-space: normal !important;
    word-wrap: break-word !important;
    box-sizing: border-box !important;
  }

  /* 单栏长文容器 */
  .page-about__section {
    padding: 30px 0;
  }
  .page-about__article-wrap {
    padding-left: 15px;
    padding-right: 15px;
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }
  .page-about__heading {
    font-size: 1.8em;
    margin-bottom: 20px;
  }
  .page-about__sub-heading {
    font-size: 1.3em;
    margin-top: 25px;
    margin-bottom: 10px;
  }
  .page-about p,
  .page-about__list-item {
    font-size: 0.95em;
  }
  .page-about__promo-box {
    padding: 20px;
    margin: 30px 0;
  }
  .page-about__promo-title {
    font-size: 1.5em;
  }

  /* 通用图片与 figure */
  .page-about img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
    box-sizing: border-box !important;
  }
  .page-about__figure {
    margin: 20px 0;
  }

  /* 按钮容器移动端适配 */
  .page-about__cta-buttons,
  .page-about__contact-buttons,
  .page-about__final-cta {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
    flex-wrap: wrap !important;
    gap: 10px;
  }

  /* 注册教程与 FAQ 区块 (General content blocks) */
  .page-about__list {
    margin-left: 15px;
  }
}

/* Ensure all images maintain original color */
.page-about img {
  filter: none; /* Absolutely no filter to change image color */
}

/* Contrast fix classes */
.page-about__contrast-fix {
  background: #ffffff !important;
  color: #333333 !important;
  border: 1px solid #e0e0e0 !important;
}

.page-about__text-contrast-fix {
  color: #333333 !important;
  text-shadow: none !important;
}