:root {
  --page-about-primary-color: #F2C14E;
  --page-about-secondary-color: #FFD36B;
  --page-about-card-bg: #111111;
  --page-about-background: #0A0A0A;
  --page-about-text-main: #FFF6D6;
  --page-about-border-color: #3A2A12;
  --page-about-glow-color: #FFD36B;
  --page-about-button-gradient: linear-gradient(180deg, #FFD86A 0%, #DDA11D 100%);
}

.page-about {
  color: var(--page-about-text-main); /* Light text for dark background */
  background: var(--page-about-background); /* Dark background */
  line-height: 1.6;
  font-family: Arial, sans-serif;
}

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

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

.page-about__container--reverse {
  flex-direction: row-reverse;
}

.page-about__container--center {
  text-align: center;
}

.page-about__section {
  padding: 60px 0;
  border-bottom: 1px solid var(--page-about-border-color);
}

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

.page-about__section-title {
  font-size: clamp(28px, 4vw, 38px);
  color: var(--page-about-secondary-color);
  text-align: center;
  margin-bottom: 40px;
  font-weight: 700;
  line-height: 1.2;
}

.page-about__text-block {
  font-size: 17px;
  margin-bottom: 20px;
  color: var(--page-about-text-main);
}

/* HERO SECTION */
.page-about__hero-section {
  position: relative;
  padding-top: 10px; /* Small top padding, body handles header offset */
  padding-bottom: 40px;
  background: var(--page-about-background);
  overflow: hidden;
}

.page-about__hero-image {
  position: relative;
  width: 100%;
  height: 500px; /* Fixed height for desktop */
  overflow: hidden;
  margin-bottom: 30px;
  border-radius: 10px;
}

.page-about__hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover; /* Covers the area, might crop */
  display: block;
}

.page-about__hero-content {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
  padding: 0 20px;
  position: relative;
  z-index: 2;
}

.page-about__main-title {
  font-size: clamp(36px, 5vw, 52px);
  font-weight: 800;
  color: var(--page-about-primary-color);
  margin-bottom: 20px;
  line-height: 1.1;
  text-shadow: 0 0 10px rgba(255, 211, 107, 0.5); /* Glow effect */
}

.page-about__hero-description {
  font-size: clamp(18px, 2.5vw, 22px);
  color: var(--page-about-text-main);
  margin-bottom: 30px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

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

/* BUTTONS */
.page-about__btn-primary,
.page-about__btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 15px 30px;
  border-radius: 8px;
  font-size: 18px;
  font-weight: 700;
  text-decoration: none;
  transition: all 0.3s ease;
  cursor: pointer;
  max-width: 100%;
  box-sizing: border-box;
  white-space: normal;
  word-wrap: break-word;
}

.page-about__btn-primary {
  background: var(--page-about-button-gradient);
  color: #000000; /* Dark text for bright button */
  border: none;
  box-shadow: 0 5px 15px rgba(255, 211, 107, 0.4);
}

.page-about__btn-primary:hover {
  opacity: 0.9;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(255, 211, 107, 0.6);
}

.page-about__btn-secondary {
  background: transparent;
  color: var(--page-about-primary-color);
  border: 2px solid var(--page-about-primary-color);
  box-shadow: 0 0 10px rgba(242, 193, 78, 0.3);
}

.page-about__btn-secondary:hover {
  background: var(--page-about-primary-color);
  color: #000000;
  transform: translateY(-2px);
  box-shadow: 0 0 15px rgba(242, 193, 78, 0.5);
}

.page-about__cta-buttons--center {
  justify-content: center;
  margin-top: 40px;
}

/* INTRODUCTION SECTION */
.page-about__values-list {
  list-style: none;
  padding: 0;
  margin-top: 30px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  color: var(--page-about-text-main);
}

.page-about__values-list li {
  background: var(--page-about-card-bg);
  padding: 20px;
  border-radius: 8px;
  border: 1px solid var(--page-about-border-color);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
  font-size: 16px;
  position: relative;
  padding-left: 45px;
}

.page-about__values-list li::before {
  content: '✔';
  color: var(--page-about-primary-color);
  font-size: 20px;
  position: absolute;
  left: 15px;
  top: 18px;
}

/* HISTORY SECTION */
.page-about__image-wrapper {
  flex: 1;
  min-width: 300px;
}

.page-about__image-wrapper img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 10px;
  border: 1px solid var(--page-about-border-color);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

.page-about__content-wrapper {
  flex: 1;
  min-width: 300px;
}

/* PRODUCTS AND SERVICES SECTION */
.page-about__services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.page-about__service-card {
  background: var(--page-about-card-bg);
  border: 1px solid var(--page-about-border-color);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
  text-align: center;
  display: flex;
  flex-direction: column;
}

.page-about__service-card img {
  width: 100%;
  height: 200px; /* Fixed height for consistent card appearance */
  object-fit: cover;
  display: block;
}

.page-about__card-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--page-about-primary-color);
  margin: 20px 15px 10px;
}

.page-about__card-title a {
  color: inherit;
  text-decoration: none;
}

.page-about__card-title a:hover {
  text-decoration: underline;
}

.page-about__card-description {
  font-size: 15px;
  color: var(--page-about-text-main);
  padding: 0 15px;
  margin-bottom: 20px;
  flex-grow: 1;
}

.page-about__service-card .page-about__btn-secondary {
  margin: 0 15px 20px;
}

/* SECURITY SECTION (using page-about__dark-section for explicit dark background) */
.page-about__dark-section {
  background: var(--page-about-background);
  color: var(--page-about-text-main);
}

/* SUPPORT SECTION */
.page-about__support-methods {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 25px;
  margin-top: 40px;
}

.page-about__support-item {
  background: var(--page-about-card-bg);
  border: 1px solid var(--page-about-border-color);
  border-radius: 10px;
  padding: 30px;
  text-align: center;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.page-about__support-item .page-about__card-title {
  font-size: 24px;
  margin-top: 0;
  margin-bottom: 15px;
}

.page-about__support-item .page-about__card-description {
  font-size: 16px;
  margin-bottom: 0;
  padding: 0;
}

/* PROMOTIONS SECTION */
.page-about__promotion-list {
  list-style: none;
  padding: 0;
  margin-top: 30px;
  color: var(--page-about-text-main);
}

.page-about__promotion-list li {
  background: var(--page-about-card-bg);
  border: 1px solid var(--page-about-border-color);
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 15px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  font-size: 17px;
  position: relative;
  padding-left: 45px;
}

.page-about__promotion-list li strong {
  color: var(--page-about-primary-color);
}

.page-about__promotion-list li::before {
  content: '⭐'; /* Unicode star emoji */
  font-size: 20px;
  position: absolute;
  left: 15px;
  top: 18px;
}

/* FAQ SECTION */
.page-about__faq-list {
  margin-top: 40px;
}

details.page-about__faq-item {
  margin-bottom: 15px;
  border-radius: 8px;
  border: 1px solid var(--page-about-border-color);
  overflow: hidden;
  background: var(--page-about-card-bg);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}
details.page-about__faq-item summary.page-about__faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 25px;
  cursor: pointer;
  user-select: none;
  list-style: none;
  transition: background-color 0.3s ease;
  color: var(--page-about-primary-color);
}
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: rgba(255, 211, 107, 0.1); /* Slight hover effect */
}
.page-about__faq-qtext {
  flex: 1;
  font-size: 18px;
  font-weight: 600;
  line-height: 1.5;
  text-align: left;
}
.page-about__faq-toggle {
  font-size: 26px;
  font-weight: bold;
  color: var(--page-about-secondary-color);
  flex-shrink: 0;
  margin-left: 15px;
  width: 30px;
  text-align: center;
}
details.page-about__faq-item .page-about__faq-answer {
  padding: 0 25px 25px;
  background: var(--page-about-background);
  border-radius: 0 0 8px 8px;
  color: var(--page-about-text-main);
  font-size: 16px;
}
details.page-about__faq-item .page-about__faq-answer p {
  margin-bottom: 0;
}

/* FINAL CTA SECTION */
.page-about__cta-final {
  padding-bottom: 80px;
}

.page-about__cta-final .page-about__section-title {
  margin-bottom: 25px;
}

.page-about__cta-final .page-about__text-block {
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  text-align: center;
  font-size: 18px;
}

/* RESPONSIVE STYLES */
/* General images and containers for desktop */
.page-about img {
  max-width: 100%;
  height: auto;
  display: block;
}

.page-about__section,
.page-about__container,
.page-about__card,
.page-about__image-wrapper,
.page-about__content-wrapper,
.page-about__hero-cta-buttons,
.page-about__cta-buttons,
.page-about__button-group,
.page-about__btn-container {
  max-width: 100%;
  width: 100%;
  box-sizing: border-box;
  overflow: hidden; /* Ensure no horizontal overflow */
}

@media (max-width: 1024px) {
  .page-about__container {
    padding: 20px 30px;
  }
  .page-about__hero-image {
    height: 400px;
  }
  .page-about__main-title {
    font-size: clamp(32px, 4.5vw, 48px);
  }
  .page-about__hero-description {
    font-size: clamp(16px, 2.2vw, 20px);
  }
  .page-about__container--flex {
    flex-direction: column;
  }
  .page-about__content-wrapper--right {
    padding-top: 30px;
  }
  .page-about__container--reverse {
    flex-direction: column; /* Consistent stacking on smaller screens */
  }
  .page-about__image-wrapper--right {
    padding-bottom: 30px;
  }
}

@media (max-width: 768px) {
  /* HERO 主图区域 */
  .page-about__hero-section {
    padding-top: 10px; /* Small top padding for mobile */
    padding-bottom: 30px;
  }
  .page-about__hero-image {
    height: auto; /* Allow height to adjust */
    aspect-ratio: 16/9; /* Maintain aspect ratio */
  }
  .page-about__hero-image img {
    object-fit: contain !important; /* Prevents cropping on mobile */
    height: auto !important; /* Override fixed height */
    aspect-ratio: unset !important; /* Allow natural aspect ratio based on content */
  }
  .page-about__main-title {
    font-size: clamp(28px, 8vw, 36px);
    margin-bottom: 15px;
  }
  .page-about__hero-description {
    font-size: clamp(16px, 4vw, 18px);
    margin-bottom: 25px;
  }
  .page-about__hero-cta-buttons {
    flex-direction: column;
    gap: 15px;
  }
  /* 按钮与按钮容器 */
  .page-about__btn-primary,
  .page-about__btn-secondary,
  .page-about a[class*="button"],
  .page-about a[class*="btn"] {
    padding: 12px 20px;
    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__hero-cta-buttons,
  .page-about__cta-buttons,
  .page-about__button-group,
  .page-about__btn-container {
    padding-left: 15px;
    padding-right: 15px;
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    flex-wrap: wrap !important; /* Allow multiple buttons to wrap */
    gap: 10px;
    flex-direction: column; /* Stack buttons vertically */
  }
  .page-about__section {
    padding: 40px 0;
  }
  .page-about__container {
    padding: 0 15px;
  }
  .page-about__section-title {
    font-size: clamp(24px, 7vw, 32px);
    margin-bottom: 30px;
  }
  .page-about__text-block {
    font-size: 16px;
  }
  /* 产品展示图区域 (page-about__services-grid) */
  .page-about__services-grid {
    grid-template-columns: 1fr 1fr; /* 2 columns for mobile */
    gap: 20px;
    overflow-x: hidden; /* Prevent horizontal scroll */
    padding-left: 15px;
    padding-right: 15px;
  }
  .page-about__service-card img {
     /* Adjust card image height */
  }
  /* 装饰主标题 + 长文 SEO 区 */
  .page-about__section-title-wrap,
  .page-about__article-body,
  .page-about__article-figure {
    text-align: center;
    max-width: 100% !important;
    margin-left: auto !important;
    margin-right: auto !important;
    padding-left: 15px;
    padding-right: 15px;
    box-sizing: border-box;
  }
  .page-about__values-list {
    grid-template-columns: 1fr;
    padding: 0 15px;
  }
  .page-about__values-list li,
  .page-about__promotion-list li {
    padding: 15px 15px 15px 40px;
    font-size: 15px;
  }
  .page-about__values-list li::before,
  .page-about__promotion-list li::before {
    top: 15px;
  }
  .page-about__support-methods {
    grid-template-columns: 1fr;
    gap: 15px;
  }
  .page-about__support-item {
    padding: 25px;
  }
  details.page-about__faq-item summary.page-about__faq-question {
    padding: 15px 20px;
  }
  .page-about__faq-qtext {
    font-size: 16px;
  }
  .page-about__faq-toggle {
    font-size: 22px;
  }
  details.page-about__faq-item .page-about__faq-answer {
    padding: 0 20px 20px;
    font-size: 15px;
  }
  /* 通用图片与容器 */
  .page-about img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
  }
  .page-about__section,
  .page-about__card,
  .page-about__container {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
  }
  .page-about__container--flex {
    gap: 20px;
  }
}