:root {
  --primary-color: #113B7A; /* 主色调 */
  --secondary-color: #1D5FD1; /* 辅助色 */
  --button-gradient: linear-gradient(180deg, #2B73F6 0%, #1144A6 100%); /* 按钮 */
  --card-bg: #10233F; /* Card BG */
  --text-main: #F3F8FF; /* Text Main */
  --text-secondary: #AFC4E8; /* Text Secondary */
  --border-color: #244D84; /* 边框 */
  --glow-color: #4FA8FF; /* Glow */
  --gold-color: #F2C14E; /* Gold */
  --divider-color: #1B3357; /* Divider */
  --deep-navy: #08162B; /* Deep Navy */
}

.page-about {
  font-family: 'Arial', sans-serif;
  line-height: 1.6;
  color: var(--text-main); /* Default text color for the page, adapting to deep-navy body bg */
  background-color: var(--deep-navy);
}

.page-about__hero-section {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 60px 20px;
  padding-top: 10px; /* Small top padding, header offset handled by body */
  background-color: var(--deep-navy);
  overflow: hidden;
}

.page-about__hero-container {
  position: relative;
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
}

.page-about__hero-image {
  width: 100%;
  margin-bottom: 30px;
}

.page-about__hero-image img {
  width: 100%;
  height: auto;
  max-width: 100%;
  display: block;
  border-radius: 8px;
  object-fit: cover;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
}

.page-about__hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  width: 100%;
}

.page-about__main-title {
  font-size: clamp(2em, 5vw, 3.5em);
  font-weight: 700;
  color: var(--gold-color);
  margin-bottom: 15px;
  line-height: 1.2;
  text-shadow: 0 0 10px rgba(242, 193, 78, 0.5);
}

.page-about__intro-text {
  font-size: 1.1em;
  color: var(--text-secondary);
  max-width: 800px;
  margin: 0 auto 30px auto;
}

.page-about__cta-button {
  display: inline-block;
  padding: 15px 40px;
  background: var(--button-gradient);
  color: #ffffff;
  text-decoration: none;
  border-radius: 5px;
  font-size: 18px;
  font-weight: bold;
  margin-top: 20px;
  transition: all 0.3s ease;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
  border: none;
  cursor: pointer;
}

.page-about__cta-button:hover {
  filter: brightness(1.1);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
}

.page-about__cta-button--secondary {
  background: var(--primary-color);
  border: 1px solid var(--border-color);
  margin-left: 15px;
}

.page-about__cta-button--secondary:hover {
  background: var(--secondary-color);
  border-color: var(--secondary-color);
}

.page-about__section {
  padding: 80px 20px;
  border-bottom: 1px solid var(--divider-color);
}

.page-about__section:last-of-type {
  border-bottom: none;
}

.page-about__container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 15px;
}

.page-about__section-title {
  font-size: clamp(1.8em, 4vw, 2.8em);
  color: var(--gold-color);
  text-align: center;
  margin-bottom: 50px;
  font-weight: 700;
  text-shadow: 0 0 8px rgba(242, 193, 78, 0.3);
}

/* Color Contrast Handling */
.page-about__intro-section,
.page-about__values-section,
.page-about__team-section,
.page-about__contact-section {
  background-color: #ffffff; /* Light background */
  color: #333333; /* Dark text for contrast */
}

.page-about__history-section,
.page-about__security-section,
.page-about__future-section {
  background-color: var(--card-bg); /* Dark background */
  color: var(--text-main); /* Light text for contrast */
}

.page-about__intro-section .page-about__section-title,
.page-about__values-section .page-about__section-title,
.page-about__team-section .page-about__section-title,
.page-about__contact-section .page-about__section-title {
  color: var(--primary-color);
  text-shadow: none;
}

.page-about__intro-section p,
.page-about__values-section p,
.page-about__team-section p,
.page-about__contact-section p {
  color: #555555;
}

.page-about__values-section .page-about__value-title {
  color: var(--primary-color);
}

.page-about__values-section .page-about__value-item {
  background-color: #f9f9f9;
  border: 1px solid #e0e0e0;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

.page-about__values-section .page-about__value-item:hover {
  box-shadow: 0 8px 15px rgba(0, 0, 0, 0.15);
}

.page-about__values-section .page-about__value-item p {
  color: #666666;
}

.page-about__content-grid {
  display: flex;
  gap: 40px;
  align-items: center;
}

.page-about__content-grid--reversed {
  flex-direction: row-reverse;
}

.page-about__text-block {
  flex: 1;
  font-size: 1.05em;
}

.page-about__text-block p {
  margin-bottom: 20px;
}

.page-about__image-block {
  flex: 1;
  min-width: 200px; /* Minimum size for content images */
}

.page-about__image-block img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 8px;
  object-fit: cover;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

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

.page-about__value-item {
  background-color: var(--card-bg);
  padding: 30px;
  border-radius: 10px;
  text-align: center;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  border: 1px solid var(--border-color);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.page-about__value-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

.page-about__value-title {
  font-size: 1.5em;
  color: var(--gold-color);
  margin-bottom: 15px;
  font-weight: 600;
}

.page-about__value-item p {
  font-size: 0.95em;
  color: var(--text-secondary);
}

.page-about__contact-description {
  text-align: center;
  font-size: 1.1em;
  max-width: 800px;
  margin: 0 auto 40px auto;
}

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

/* Mobile responsiveness */
@media (max-width: 768px) {
  .page-about {
    font-size: 15px;
    line-height: 1.5;
  }

  .page-about__hero-section {
    padding-top: 10px !important;
    padding-bottom: 40px;
    padding-left: 15px;
    padding-right: 15px;
  }

  .page-about__hero-image img {
    border-radius: 4px;
  }

  .page-about__main-title {
    font-size: 2.2em;
  }

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

  .page-about__cta-button {
    padding: 12px 30px;
    font-size: 16px;
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    white-space: normal !important;
    word-wrap: break-word !important;
  }

  .page-about__cta-button--secondary {
    margin-left: 0;
    margin-top: 15px;
  }

  .page-about__contact-buttons {
    flex-direction: column;
    gap: 15px;
    padding: 0 15px;
  }

  .page-about__section {
    padding: 50px 15px;
  }

  .page-about__section-title {
    font-size: 2em;
    margin-bottom: 30px;
  }

  .page-about__content-grid {
    flex-direction: column;
    gap: 30px;
  }

  .page-about__content-grid--reversed {
    flex-direction: column;
  }

  .page-about__image-block img,
  .page-about img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
    min-width: 200px; /* Ensure images are not too small */
    min-height: 200px; /* Ensure images are not too small */
  }

  .page-about__section,
  .page-about__container,
  .page-about__value-item {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
  }

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

  .page-about__value-title {
    font-size: 1.3em;
  }

  .page-about__value-item p {
    font-size: 0.9em;
  }

  /* Ensure all images maintain min-size or are responsive */
  .page-about__image-block,
  .page-about__content-grid img {
    width: 100%;
    height: auto;
    min-width: 200px;
    min-height: 200px;
  }
}