/* style/about-us.css */
.page-about-us {
  font-family: 'Arial', sans-serif;
  line-height: 1.6;
  color: #333333; /* Default dark text for light body background */
  background-color: var(--bg-color, #FFFFFF);
}

.page-about-us__container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 15px;
  box-sizing: border-box;
}

.page-about-us__hero-section {
  padding-top: 10px; /* Small top padding, assuming body has header offset */
  padding-bottom: 40px;
  text-align: center;
  background-color: #f8f8f8;
}

.page-about-us__hero-image-wrapper {
  margin-bottom: 30px;
}

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

.page-about-us__main-title {
  font-size: clamp(2em, 3.5vw, 3.2em);
  color: #26A9E0;
  margin-bottom: 20px;
  font-weight: 700;
  line-height: 1.2;
}

.page-about-us__hero-description {
  font-size: 1.1em;
  color: #555555;
  max-width: 900px;
  margin: 0 auto 30px auto;
}

.page-about-us__hero-buttons,
.page-about-us__cta-buttons {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 30px;
}

.page-about-us__btn-primary,
.page-about-us__btn-secondary {
  display: inline-block;
  padding: 12px 30px;
  border-radius: 5px;
  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;
}

.page-about-us__btn-primary {
  background-color: #26A9E0;
  color: #FFFFFF;
  border: 2px solid #26A9E0;
}

.page-about-us__btn-primary:hover {
  background-color: #1a7bb7;
  border-color: #1a7bb7;
}

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

.page-about-us__btn-secondary:hover {
  background-color: #f0f0f0;
  color: #1a7bb7;
  border-color: #1a7bb7;
}

.page-about-us__section-title {
  font-size: 2.5em;
  color: #26A9E0;
  text-align: center;
  margin-bottom: 40px;
  font-weight: 700;
}

.page-about-us__section-title--white {
  color: #FFFFFF;
}

.page-about-us__section-description {
  font-size: 1.1em;
  text-align: center;
  max-width: 900px;
  margin: 0 auto 30px auto;
}

.page-about-us__section-description--white {
  color: #f0f0f0;
}

.page-about-us__light-bg {
  background-color: #FFFFFF;
  padding: 60px 0;
  color: #333333;
}

.page-about-us__dark-bg {
  background-color: #26A9E0;
  padding: 60px 0;
  color: #FFFFFF;
}

.page-about-us__mission-vision-grid,
.page-about-us__features-grid,
.page-about-us__partners-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-top: 30px;
}

.page-about-us__card {
  background: #FFFFFF;
  border-radius: 8px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  padding: 30px;
  text-align: center;
  transition: transform 0.3s ease;
  height: 100%; /* Ensure cards have equal height */
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  color: #333333;
}

.page-about-us__card-image {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto 20px auto;
  border-radius: 5px;
}

.page-about-us__card-title {
  font-size: 1.5em;
  color: #26A9E0;
  margin-bottom: 15px;
  font-weight: 600;
}

.page-about-us__card-text {
  font-size: 1em;
  color: #555555;
  flex-grow: 1;
}

.page-about-us__feature-item {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 8px;
  padding: 25px;
  text-align: center;
  color: #FFFFFF;
}

.page-about-us__feature-title {
  font-size: 1.4em;
  color: #FFFFFF;
  margin-bottom: 10px;
  font-weight: 600;
}

.page-about-us__feature-text {
  font-size: 0.95em;
  color: #f0f0f0;
}

.page-about-us__tech-content {
  display: flex;
  align-items: center;
  gap: 40px;
  margin-top: 30px;
}

.page-about-us__tech-text {
  flex: 1;
}

.page-about-us__tech-text p {
  margin-bottom: 20px;
  font-size: 1.05em;
  color: #555555;
}

.page-about-us__tech-image {
  flex: 1;
}

.page-about-us__image-full-width {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 8px;
  object-fit: cover;
}

.page-about-us__cta-bottom {
  text-align: center;
  margin-top: 50px;
  display: flex;
  justify-content: center;
  gap: 20px;
}

.page-about-us__btn-secondary--white {
  background-color: #FFFFFF;
  color: #26A9E0;
  border-color: #FFFFFF;
}

.page-about-us__btn-secondary--white:hover {
  background-color: #f0f0f0;
  color: #1a7bb7;
  border-color: #f0f0f0;
}

/* Mobile responsive styles */
@media (max-width: 1024px) {
  .page-about-us__main-title {
    font-size: clamp(2em, 4vw, 2.8em);
  }
  .page-about-us__section-title {
    font-size: 2em;
  }
  .page-about-us__tech-content {
    flex-direction: column;
  }
  .page-about-us__hero-buttons,
  .page-about-us__cta-buttons,
  .page-about-us__cta-bottom {
    flex-direction: column;
    align-items: center;
  }
  .page-about-us__btn-primary,
  .page-about-us__btn-secondary {
    width: 80%;
  }
}

@media (max-width: 768px) {
  .page-about-us {
    font-size: 16px;
    line-height: 1.6;
  }

  /* HERO 主图区域 */
  .page-about-us__hero-section {
    padding-top: 10px !important;
    padding-bottom: 30px;
  }

  .page-about-us__main-title {
    font-size: clamp(1.8em, 6vw, 2.2em);
    margin-bottom: 15px;
  }

  .page-about-us__hero-description {
    font-size: 1em;
    margin-bottom: 20px;
    padding: 0 15px;
  }

  .page-about-us__hero-buttons,
  .page-about-us__cta-buttons,
  .page-about-us__cta-bottom {
    flex-direction: column !important;
    gap: 15px !important;
    padding: 0 15px;
    width: 100% !important;
    box-sizing: border-box !important;
  }

  /* 按钮与按钮容器 */
  .page-about-us__btn-primary,
  .page-about-us__btn-secondary,
  .page-about-us a[class*="button"],
  .page-about-us 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;
  }
  
  .page-about-us__cta-buttons,
  .page-about-us__button-group,
  .page-about-us__btn-container {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
    flex-wrap: wrap !important;
    gap: 10px;
  }

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

  .page-about-us__section,
  .page-about-us__card,
  .page-about-us__container {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
  }

  /* 其他内容模块 */
  .page-about-us__section-title {
    font-size: 1.8em;
    margin-bottom: 30px;
  }

  .page-about-us__section-description {
    font-size: 1em;
    padding: 0 10px;
  }

  .page-about-us__mission-vision-grid,
  .page-about-us__features-grid,
  .page-about-us__partners-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .page-about-us__card,
  .page-about-us__feature-item {
    padding: 20px;
  }

  .page-about-us__card-title,
  .page-about-us__feature-title {
    font-size: 1.3em;
  }

  .page-about-us__card-text,
  .page-about-us__feature-text {
    font-size: 0.9em;
  }

  .page-about-us__tech-content {
    flex-direction: column;
    gap: 20px;
  }

  .page-about-us__tech-text p {
    font-size: 1em;
  }

  .page-about-us__light-bg,
  .page-about-us__dark-bg {
    padding: 40px 0;
  }

  .page-about-us__cta-bottom {
    margin-top: 30px;
  }
}