.page-about {
  font-family: 'Arial', sans-serif;
  line-height: 1.6;
  color: #ffffff; /* Body background is dark #0a0a0a, so text is light */
  background-color: transparent; /* Rely on body background from shared.css */
}

.page-about__hero-section {
  position: relative;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 60px 20px;
  padding-top: 10px; /* Small top padding, body handles --header-offset */
  background-color: rgba(0, 0, 0, 0.4); /* Slightly dark overlay for text readability */
  box-sizing: border-box;
}

.page-about__hero-image-wrapper {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  z-index: -1;
}

.page-about__hero-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.page-about__hero-content {
  position: relative;
  z-index: 1;
  max-width: 900px;
  margin: 0 auto;
  padding: 20px;
}

.page-about__main-title {
  font-weight: bold;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: #ffffff;
  margin-bottom: 20px;
  max-width: 100%;
}

.page-about__description {
  font-size: 1.1em;
  color: #f0f0f0;
  margin-bottom: 30px;
}

.page-about__btn-primary {
  display: inline-block;
  background-color: #26A9E0;
  color: #ffffff;
  padding: 12px 25px;
  border-radius: 5px;
  text-decoration: none;
  font-weight: bold;
  transition: background-color 0.3s ease;
  box-sizing: border-box;
}

.page-about__btn-primary:hover {
  background-color: #1a8cc4;
}

.page-about__btn-secondary {
  display: inline-block;
  background-color: #ffffff;
  color: #26A9E0;
  padding: 12px 25px;
  border-radius: 5px;
  text-decoration: none;
  font-weight: bold;
  border: 2px solid #26A9E0;
  transition: background-color 0.3s ease, color 0.3s ease;
  box-sizing: border-box;
}

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

.page-about__btn-tertiary {
  display: inline-block;
  background-color: transparent;
  color: #26A9E0;
  padding: 12px 25px;
  border-radius: 5px;
  text-decoration: none;
  font-weight: bold;
  border: 2px solid #26A9E0;
  transition: background-color 0.3s ease, color 0.3s ease;
  box-sizing: border-box;
}

.page-about__btn-tertiary:hover {
  background-color: #26A9E0;
  color: #ffffff;
}

.page-about__section {
  padding: 60px 20px;
  text-align: center;
  box-sizing: border-box;
}

.page-about__section--vision {
  background-color: rgba(255, 255, 255, 0.05);
}

.page-about__section--values {
  background-color: rgba(0, 0, 0, 0.6);
}

.page-about__section--why-choose {
  background-color: rgba(255, 255, 255, 0.05);
}

.page-about__section--responsibility {
  background-color: rgba(0, 0, 0, 0.6);
}

.page-about__section--contact {
  background-color: rgba(255, 255, 255, 0.05);
}

.page-about__section--faq {
  background-color: rgba(0, 0, 0, 0.6);
}

.page-about__container {
  max-width: 1200px;
  margin: 0 auto;
  box-sizing: border-box;
}

.page-about__section-title {
  font-size: 2.5em;
  color: #26A9E0;
  margin-bottom: 30px;
  font-weight: bold;
  text-shadow: 1px 1px 2px rgba(0,0,0,0.5);
}

.page-about__text-block {
  font-size: 1.1em;
  color: #f0f0f0;
  max-width: 900px;
  margin: 0 auto 20px auto;
  line-height: 1.7;
}

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

.page-about__value-card {
  background-color: rgba(255, 255, 255, 0.1);
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
  text-align: left;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

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

.page-about__value-description {
  color: #f0f0f0;
  font-size: 1em;
}

.page-about__feature-list {
  margin-top: 40px;
  display: flex;
  flex-direction: column;
  gap: 60px;
}

.page-about__feature-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  background-color: rgba(0, 0, 0, 0.4);
  padding: 40px;
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.page-about__feature-item:nth-child(even) {
  flex-direction: column-reverse; /* Alternate layout for visual variety */
}

.page-about__feature-image {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  margin-bottom: 30px;
  object-fit: cover;
  width: 100%; /* Ensure image fills its container */
  min-height: 200px; /* Minimum size requirement */
}

.page-about__feature-title {
  font-size: 1.8em;
  color: #26A9E0;
  margin-bottom: 20px;
  font-weight: bold;
}

.page-about__feature-description {
  color: #f0f0f0;
  font-size: 1.1em;
  margin-bottom: 20px;
  line-height: 1.7;
}

.page-about__feature-details {
  list-style: none;
  padding: 0;
  margin: 0 0 20px 0;
  color: #f0f0f0;
  text-align: left;
  width: 100%;
  max-width: 600px;
}

.page-about__feature-details li {
  background: url('data:image/svg+xml;charset=UTF-8,<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="%2326A9E0"><path d="M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z"/></svg>') no-repeat left center;
  background-size: 18px;
  padding-left: 25px;
  margin-bottom: 10px;
}

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

.page-about__faq-item {
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  margin-bottom: 15px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.page-about__faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px;
  cursor: pointer;
  font-size: 1.2em;
  font-weight: bold;
  color: #ffffff;
  background-color: rgba(255, 255, 255, 0.05);
  transition: background-color 0.3s ease;
}

.page-about__faq-question:hover {
  background-color: rgba(255, 255, 255, 0.15);
}

.page-about__faq-toggle {
  font-size: 1.5em;
  line-height: 1;
  color: #26A9E0;
  margin-left: 15px;
}

/* For <details> tag, hide default marker */
.page-about__faq-item summary::-webkit-details-marker {
  display: none;
}
.page-about__faq-item summary {
  list-style: none;
}

.page-about__faq-answer {
  padding: 0 20px 20px 20px;
  font-size: 1.1em;
  color: #f0f0f0;
  line-height: 1.7;
}

.page-about__faq-answer p {
  margin-top: 0;
  margin-bottom: 15px;
}

.page-about__faq-answer a {
  color: #26A9E0;
  text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 1024px) {
  .page-about__section-title {
    font-size: 2em;
  }
  .page-about__main-title {
    font-size: 2.2em;
  }
}

@media (max-width: 768px) {
  .page-about__main-title {
    font-size: 1.8em;
    margin-bottom: 15px;
  }

  .page-about__description {
    font-size: 1em;
    margin-bottom: 20px;
  }

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

  .page-about__section-title {
    font-size: 1.8em;
    margin-bottom: 25px;
  }

  .page-about__text-block {
    font-size: 1em;
    margin-bottom: 15px;
  }

  .page-about__values-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .page-about__value-card {
    padding: 25px;
  }

  .page-about__feature-item {
    padding: 30px;
    flex-direction: column !important; /* Force column for small screens */
  }

  .page-about__feature-image {
    margin-bottom: 20px;
  }

  .page-about__feature-title {
    font-size: 1.5em;
    margin-bottom: 15px;
  }

  .page-about__feature-description {
    font-size: 0.95em;
    margin-bottom: 15px;
  }

  .page-about__faq-question {
    font-size: 1.1em;
    padding: 15px;
  }

  .page-about__faq-answer {
    font-size: 1em;
    padding: 0 15px 15px 15px;
  }

  /* 移动端图片响应式适配强制要求 */
  .page-about img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
    display: block !important;
  }
  
  .page-about__section,
  .page-about__card,
  .page-about__container,
  .page-about__hero-section,
  .page-about__values-grid,
  .page-about__feature-item,
  .page-about__faq-list,
  .page-about__faq-item {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
    overflow: hidden !important;
  }

  /* 移动端按钮响应式适配强制要求 */
  .page-about__btn-primary,
  .page-about__btn-secondary,
  .page-about__btn-tertiary,
  .page-about a[class*="button"],
  .page-about a[class*="btn"] {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    white-space: normal !important;
    word-wrap: break-word !important;
    padding-left: 15px;
    padding-right: 15px;
    margin-bottom: 10px; /* Add some space between stacked buttons */
  }

  .page-about__hero-content .page-about__btn-primary {
    margin-bottom: 0; /* Remove extra margin if only one button */
  }

  /* If multiple buttons in a group, stack them */
  .page-about__hero-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px; /* Space between buttons */
  }
}

@media (min-width: 769px) {
  .page-about__feature-item:nth-child(even) {
    flex-direction: row-reverse; /* Revert to row-reverse on larger screens */
  }
  .page-about__feature-item {
    flex-direction: row;
    gap: 40px;
    text-align: left;
  }
  .page-about__feature-image {
    flex: 1;
    max-width: 50%;
    margin-bottom: 0;
  }
  .page-about__feature-content {
    flex: 1;
    max-width: 50%;
  }
}