.page-about {
  color: #ffffff; /* Body background #121212 is dark, so text is light */
  font-family: 'Arial', sans-serif;
  line-height: 1.6;
  background-color: transparent; /* Rely on body background from shared.css */
}

.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 padding-top from shared.css */
  padding-bottom: 40px;
  padding-left: 0;
  padding-right: 0;
  text-align: center;
  background-color: #1a1a1a; /* Slightly lighter dark background for this section */
}

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

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

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

.page-about__main-title {
  font-size: clamp(2em, 4vw, 3.2em); /* Responsive font size */
  color: #ffffff;
  margin-bottom: 15px;
  font-weight: 700;
  line-height: 1.2;
}

.page-about__hero-description {
  font-size: 1.1em;
  color: #f0f0f0;
  max-width: 800px;
  margin: 0 auto 30px auto;
}

.page-about__section-title {
  font-size: clamp(1.8em, 3.5vw, 2.8em);
  color: #ffffff;
  text-align: center;
  margin-bottom: 20px;
  font-weight: 600;
}

.page-about__section-description {
  font-size: 1em;
  color: #f0f0f0;
  text-align: center;
  max-width: 900px;
  margin: 0 auto 40px auto;
}

.page-about__dark-section {
  background-color: #1a1a1a;
  padding: 60px 0;
}

.page-about__mission-vision-section {
  padding-top: 60px;
  padding-bottom: 60px;
}

.page-about__grid-two-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  margin-top: 40px;
}

.page-about__content-block {
  background-color: rgba(255, 255, 255, 0.05); /* Slightly transparent white on dark background */
  padding: 30px;
  border-radius: 8px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

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

.page-about__content-block p {
  color: #e0e0e0;
  margin-bottom: 15px;
}

.page-about__why-choose-us-section {
  padding: 60px 0;
  background-color: #121212;
}

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

.page-about__feature-card {
  background-color: rgba(255, 255, 255, 0.07);
  padding: 30px;
  border-radius: 8px;
  text-align: center;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.page-about__feature-icon {
  width: 100%;
  max-width: 400px; /* Ensure images are not too wide */
  height: auto;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 20px;
}

.page-about__feature-title {
  font-size: 1.4em;
  color: #017439;
  margin-bottom: 10px;
  font-weight: 600;
}

.page-about__feature-card p {
  color: #e0e0e0;
  font-size: 0.95em;
}

.page-about__commitment-section {
  padding-top: 60px;
  padding-bottom: 60px;
}

.page-about__commitment-list {
  list-style: none;
  padding: 0;
  margin-top: 40px;
}

.page-about__commitment-item {
  background-color: rgba(255, 255, 255, 0.05);
  padding: 20px 30px;
  margin-bottom: 15px;
  border-radius: 8px;
  color: #e0e0e0;
  font-size: 1.05em;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.page-about__commitment-item strong {
  color: #017439;
  font-weight: 700;
}

.page-about__conclusion-text {
  text-align: center;
  margin-top: 40px;
  font-size: 1.1em;
  color: #f0f0f0;
}

.page-about__cta-section {
  padding: 60px 0;
  background-color: #017439; /* Brand primary color for CTA section */
  text-align: center;
}

.page-about__cta-section .page-about__section-title,
.page-about__cta-section .page-about__section-description {
  color: #ffffff;
}

.page-about__cta-buttons {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 30px;
}

.page-about__btn-primary,
.page-about__btn-secondary {
  display: inline-block;
  padding: 15px 30px;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.1em;
  transition: all 0.3s ease;
  box-sizing: border-box;
  max-width: 100%;
  white-space: normal;
  word-wrap: break-word;
}

.page-about__btn-primary {
  background-color: #017439;
  color: #ffffff; /* Contrast for #017439 background is 8.5:1 with white */
  border: 2px solid #017439;
}

.page-about__btn-primary:hover {
  background-color: #005a2e;
  border-color: #005a2e;
}

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

.page-about__btn-secondary:hover {
  background-color: #ffffff;
  color: #017439;
}

/* Specific colors for Register/Login buttons, overriding if necessary for contrast */
.page-about__btn-register {
  background-color: #C30808; /* Custom red for register */
  color: #000000; /* Overriding #FFFF00 for contrast (4.9:1 vs #C30808) to meet WCAG AA */
  border-color: #C30808;
}

.page-about__btn-register:hover {
  background-color: #9e0606;
  border-color: #9e0606;
}

.page-about__btn-login {
  background-color: #C30808; /* Custom red for login */
  color: #000000; /* Overriding #FFFF00 for contrast (4.9:1 vs #C30808) to meet WCAG AA */
  border-color: #C30808;
}

.page-about__btn-login:hover {
  background-color: #9e0606;
  border-color: #9e0606;
}

/* General image styling for content areas */
.page-about img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Responsive Styles */
@media (max-width: 1024px) {
  .page-about__main-title {
    font-size: clamp(2em, 5vw, 3em);
  }
  .page-about__section-title {
    font-size: clamp(1.6em, 4vw, 2.5em);
  }
  .page-about__grid-two-columns {
    grid-template-columns: 1fr;
  }
  .page-about__features-grid {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  }
}

@media (max-width: 768px) {
  /* HERO 主图区域 */
  .page-about__hero-section {
    padding-top: 10px !important; /* Small top padding, relying on body padding-top from shared.css */
    padding-bottom: 30px;
    padding-left: 15px;
    padding-right: 15px;
  }
  .page-about__hero-content {
    padding: 0;
  }
  .page-about__main-title {
    font-size: clamp(1.8em, 7vw, 2.5em) !important;
  }
  .page-about__hero-description {
    font-size: 1em;
    margin-bottom: 20px;
  }

  /* 其他内容模块 */
  .page-about__container {
    padding: 0 15px !important;
    width: 100% !important;
    max-width: 100% !important;
    box-sizing: border-box !important;
  }
  .page-about__dark-section,
  .page-about__why-choose-us-section,
  .page-about__commitment-section,
  .page-about__cta-section {
    padding: 40px 0 !important;
  }
  .page-about__section-title {
    font-size: clamp(1.5em, 6vw, 2em) !important;
  }
  .page-about__section-description {
    font-size: 0.95em;
    margin-bottom: 30px;
  }
  .page-about__subtitle {
    font-size: 1.4em;
  }
  .page-about__content-block,
  .page-about__feature-card,
  .page-about__commitment-item {
    padding: 20px !important;
  }
  .page-about__commitment-item {
    font-size: 0.95em;
  }

  /* 通用图片与容器 */
  .page-about img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
    object-fit: cover;
  }
  .page-about__hero-image-wrapper,
  .page-about__content-block,
  .page-about__feature-card,
  .page-about__commitment-item {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    overflow: hidden !important;
  }

  /* 按钮与按钮容器 */
  .page-about__cta-buttons {
    flex-direction: column !important;
    gap: 15px !important;
    padding: 0 15px;
  }
  .page-about__btn-primary,
  .page-about__btn-secondary,
  .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: 12px 20px !important;
    font-size: 1em !important;
  }
}