.page-about {
  color: #F3F8FF; /* Text Main */
  background-color: var(--deep-navy-color); /* Body background is dark, use light text */
  font-family: Arial, sans-serif;
  line-height: 1.6;
}

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

.page-about__hero-section {
  padding-top: 10px; /* Small top padding, relying on body for header offset */
  text-align: center;
  background-color: #08162B; /* Deep Navy */
  padding-bottom: 40px;
}

.page-about__hero-image {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto 20px;
  border-radius: 8px;
  object-fit: cover;
}

.page-about__hero-content {
  padding: 20px 0;
}

.page-about__main-title {
  font-size: clamp(2.2em, 4vw, 2.8em);
  font-weight: 700;
  color: #F2C14E; /* Gold */
  margin-bottom: 15px;
  line-height: 1.2;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.page-about__description {
  font-size: clamp(1em, 1.5vw, 1.2em);
  color: #AFC4E8; /* Text Secondary */
  max-width: 800px;
  margin: 0 auto 30px;
}

.page-about__section-title {
  font-size: clamp(1.8em, 3.5vw, 2.5em);
  font-weight: 700;
  color: #F2C14E; /* Gold */
  text-align: center;
  margin-bottom: 40px;
  padding-top: 40px;
}

.page-about__mission-section {
  padding: 40px 0;
  background-color: #08162B; /* Deep Navy */
}

.page-about__text-block {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}

.page-about__text-block p {
  font-size: 1.1em;
  color: #F3F8FF; /* Text Main */
  margin-bottom: 20px;
}

.page-about__image {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 30px auto;
  border-radius: 8px;
  object-fit: cover;
}

.page-about__image--centered {
  margin-left: auto;
  margin-right: auto;
}

.page-about__why-choose-section {
  padding: 40px 0;
  background-color: #10233F; /* Card BG */
}

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

.page-about__feature-card {
  background: #1B3357; /* Slightly lighter than Card BG for contrast */
  padding: 30px;
  border-radius: 10px;
  text-align: center;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  border: 1px solid #244D84; /* Border */
}

.page-about__feature-card .page-about__card-title {
  font-size: 1.5em;
  color: #F2C14E; /* Gold */
  margin-bottom: 15px;
  font-weight: 600;
}

.page-about__feature-card p {
  font-size: 1em;
  color: #AFC4E8; /* Text Secondary */
}

.page-about__cta-section {
  background: linear-gradient(180deg, #113B7A 0%, #08162B 100%);
  padding: 60px 0;
  text-align: center;
}

.page-about__cta-content {
  max-width: 800px;
  margin: 0 auto;
}

.page-about__cta-title {
  font-size: clamp(2em, 3.8vw, 2.6em);
  color: #F2C14E; /* Gold */
  margin-bottom: 20px;
  font-weight: 700;
}

.page-about__cta-description {
  font-size: 1.1em;
  color: #F3F8FF; /* Text Main */
  margin-bottom: 30px;
}

.page-about__cta-buttons {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

.page-about__btn-primary,
.page-about__btn-secondary {
  display: inline-block;
  padding: 14px 30px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  font-size: 1.1em;
  transition: all 0.3s ease;
  max-width: 100%;
  box-sizing: border-box;
  white-space: normal;
  word-wrap: break-word;
}

.page-about__btn-primary {
  background: linear-gradient(180deg, #2B73F6 0%, #1144A6 100%);
  color: #F3F8FF; /* Text Main */
  border: 2px solid transparent;
}

.page-about__btn-primary:hover {
  background: linear-gradient(180deg, #1144A6 0%, #2B73F6 100%);
  box-shadow: 0 0 15px #4FA8FF;
}

.page-about__btn-secondary {
  background: #1B3357;
  color: #F3F8FF; /* Text Main */
  border: 2px solid #2B73F6;
}

.page-about__btn-secondary:hover {
  background: #2B73F6;
  border-color: #4FA8FF;
  box-shadow: 0 0 15px rgba(79, 168, 255, 0.5);
}

.page-about__faq-section {
  padding: 40px 0 60px;
  background-color: #08162B; /* Deep Navy */
}

.page-about__faq-list {
  max-width: 900px;
  margin: 0 auto;
}

details.page-about__faq-item {
  margin-bottom: 15px;
  border-radius: 5px;
  border: 1px solid #244D84; /* Border */
  overflow: hidden;
  background: #10233F; /* Card BG */
}

details.page-about__faq-item summary.page-about__faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 20px;
  cursor: pointer;
  user-select: none;
  list-style: none;
  transition: background-color 0.3s ease;
}

details.page-about__faq-item summary.page-about__faq-question::-webkit-details-marker {
  display: none;
}

details.page-about__faq-item summary.page-about__faq-question:hover {
  background: #1B3357;
}

.page-about__faq-qtext {
  flex: 1;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  text-align: left;
  color: #F3F8FF; /* Text Main */
}

.page-about__faq-toggle {
  font-size: 24px;
  font-weight: bold;
  color: #F2C14E; /* Gold */
  flex-shrink: 0;
  margin-left: 15px;
  width: 28px;
  text-align: center;
}

details.page-about__faq-item .page-about__faq-answer {
  padding: 0 20px 20px;
  background: #08162B; /* Deep Navy */
  border-radius: 0 0 5px 5px;
  color: #AFC4E8; /* Text Secondary */
}

.page-about__faq-answer p {
  margin: 0;
  padding: 0;
}

/* 移动端 @media (max-width: 768px) 必写清单 */
@media (max-width: 768px) {
  .page-about__container {
    padding: 0 15px;
  }

  /* 首页轮播 (hero-section) */
  .page-about__hero-section {
    padding-top: 10px !important; /* Rely on body padding for header offset */
    padding-bottom: 20px;
  }
  
  .page-about__hero-image {
    margin-bottom: 15px;
  }

  .page-about__main-title {
    font-size: 1.8em;
    margin-bottom: 10px;
  }

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

  .page-about__section-title {
    font-size: 1.6em;
    margin-bottom: 30px;
    padding-top: 30px;
  }

  /* 首页双列 CTA (Not applicable to this page, but as a general rule) */
  /* If this page had a grid like __promo-duo-grid, it would be:
  .page-about__promo-duo-grid {
    grid-template-columns: 1fr;
    gap: 15px;
  }
  */

  /* 首页长文滚动框/博客滑块 (Not applicable to this page, but as a general rule) */
  /* If this page had content like __home-content, it would be:
  .page-about__home-content {
    height: auto;
    max-height: 60vh;
    overflow-y: auto;
  }
  .page-about__blog-slider .page-about__post-cover {
    aspect-ratio: 16/9;
    object-fit: cover;
  }
  .page-about__blog-slider .page-about__post-grid {
    grid-template-columns: 1fr;
  }
  */

  /* 通用图片与容器 */
  .page-about img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
  }

  .page-about__mission-section, .page-about__why-choose-section, .page-about__faq-section {
    padding: 30px 0;
  }

  .page-about__features-grid {
    gap: 20px;
  }

  .page-about__feature-card {
    padding: 20px;
  }

  .page-about__feature-card .page-about__card-title {
    font-size: 1.3em;
  }

  .page-about__feature-card p {
    font-size: 0.95em;
  }

  /* 按钮与按钮容器 */
  .page-about__cta-buttons {
    flex-direction: column; /* Stack buttons vertically */
    gap: 15px;
    padding: 0 15px;
  }

  .page-about__btn-primary,
  .page-about__btn-secondary {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    white-space: normal !important;
    word-wrap: break-word !important;
    padding-left: 20px;
    padding-right: 20px;
    font-size: 1em;
  }

  /* 内页 FAQ 等内容模块 */
  details.page-about__faq-item summary.page-about__faq-question {
    padding: 15px;
  }
  .page-about__faq-qtext {
    font-size: 15px;
  }
  details.page-about__faq-item .page-about__faq-answer {
    padding: 0 15px 15px;
  }
}