:root {
  --color-primary: #C91F17;
  --color-secondary: #E53935;
  --color-button-gradient-start: #FFD86A;
  --color-button-gradient-end: #E6B800;
  --color-card-bg: #D32F2F;
  --color-background-section: #B71C1C;
  --color-text-main: #FFF5E1;
  --color-border: #F2B544;
  --color-glow: #FFCC66;
  --color-gold: #F4D34D;
  --color-deep-red: #7A0E0E;
}

.page-about {
  color: var(--color-text-main); /* Assuming body background is dark, based on theme */
  background-color: var(--color-background-section);
}

.page-about__hero-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding-top: 10px; /* Small top padding as shared.css handles body padding-top */
  padding-bottom: 50px;
  position: relative;
  overflow: hidden;
  background-color: var(--color-background-section);
}

.page-about__hero-image-wrapper {
  width: 100%;
  max-height: 675px;
  overflow: hidden;
  margin-bottom: 30px;
}

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

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

.page-about__hero-title {
  font-size: clamp(2.5rem, 4vw, 3.5rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 20px;
  color: var(--color-gold);
}

.page-about__hero-description {
  font-size: 1.1rem;
  line-height: 1.6;
  margin-bottom: 30px;
  color: var(--color-text-main);
}

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

.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: 1.05rem;
  font-weight: 700;
  text-decoration: none;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  white-space: normal;
  word-wrap: break-word;
  box-sizing: border-box;
  max-width: 100%;
}

.page-about__btn-primary {
  background: var(--color-button-gradient-start);
  background-image: linear-gradient(180deg, var(--color-button-gradient-start) 0%, var(--color-button-gradient-end) 100%);
  color: #333333; /* Darker text for golden button for contrast */
  border: none;
}

.page-about__btn-primary:hover {
  filter: brightness(1.1);
  transform: translateY(-2px);
}

.page-about__btn-secondary {
  background: var(--color-deep-red);
  color: var(--color-text-main);
  border: 2px solid var(--color-border);
}

.page-about__btn-secondary:hover {
  background: var(--color-primary);
  border-color: var(--color-gold);
  transform: translateY(-2px);
}

.page-about__container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 20px;
}

.page-about__section-title {
  font-size: clamp(2rem, 3.5vw, 3rem);
  font-weight: 700;
  text-align: center;
  margin-bottom: 40px;
  color: var(--color-gold);
}

.page-about__mission-vision-section {
  background-color: var(--color-background-section);
  padding: 60px 0;
}

.page-about__content-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: center;
}

.page-about__sub-title {
  font-size: 1.8rem;
  font-weight: 600;
  margin-top: 0;
  margin-bottom: 20px;
  color: var(--color-gold);
}

.page-about__text-block p {
  font-size: 1.05rem;
  line-height: 1.7;
  margin-bottom: 15px;
  color: var(--color-text-main);
}

.page-about__value-list {
  list-style: none;
  padding: 0;
  margin-top: 20px;
}

.page-about__value-list li {
  font-size: 1.05rem;
  line-height: 1.8;
  margin-bottom: 10px;
  position: relative;
  padding-left: 25px;
  color: var(--color-text-main);
}

.page-about__value-list li::before {
  content: '✔';
  color: var(--color-gold);
  position: absolute;
  left: 0;
  top: 0;
  font-weight: bold;
}

.page-about__image-wrapper {
  text-align: center;
}

.page-about__image {
  max-width: 100%;
  height: auto;
  border-radius: 10px;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
  display: block;
  margin: 0 auto;
}

.page-about__why-choose-us-section {
  padding: 80px 0;
  background-color: var(--color-background-section);
  text-align: center;
}

.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: var(--color-card-bg);
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border: 1px solid var(--color-border);
  color: var(--color-text-main);
}

.page-about__feature-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

.page-about__feature-card .page-about__card-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-top: 0;
  margin-bottom: 15px;
  color: var(--color-gold);
}

.page-about__feature-card p {
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text-main);
}

.page-about__cta-buttons--center {
  margin-top: 50px;
}

.page-about__products-overview-section {
  padding: 80px 0;
  background-color: var(--color-background-section);
}

.page-about__products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 30px;
}

.page-about__product-card {
  background-color: var(--color-card-bg);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
  transition: transform 0.3s ease;
  border: 1px solid var(--color-border);
  color: var(--color-text-main);
  text-align: center;
}

.page-about__product-card:hover {
  transform: translateY(-5px);
}

.page-about__product-image {
  width: 100%;
  height: 250px;
  object-fit: cover;
  display: block;
  margin-bottom: 15px;
}

.page-about__product-card .page-about__card-title {
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--color-gold);
  padding: 0 15px;
}

.page-about__product-card p {
  font-size: 0.95rem;
  line-height: 1.5;
  margin-bottom: 20px;
  color: var(--color-text-main);
  padding: 0 15px;
}

.page-about__btn-link {
  display: inline-block;
  background-color: var(--color-deep-red);
  color: var(--color-text-main);
  padding: 10px 20px;
  border-radius: 5px;
  text-decoration: none;
  font-weight: 600;
  margin-bottom: 20px;
  transition: background-color 0.3s ease;
  border: 1px solid var(--color-border);
}

.page-about__btn-link:hover {
  background-color: var(--color-primary);
  border-color: var(--color-gold);
}

.page-about__responsibility-section {
  padding: 80px 0;
  background-color: var(--color-background-section);
}

.page-about__content-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: center;
}

.page-about__responsibility-list {
  list-style: none;
  padding: 0;
  margin-top: 20px;
}

.page-about__responsibility-list li {
  font-size: 1.05rem;
  line-height: 1.7;
  margin-bottom: 15px;
  position: relative;
  padding-left: 30px;
  color: var(--color-text-main);
}

.page-about__responsibility-list li::before {
  content: '•';
  color: var(--color-gold);
  position: absolute;
  left: 0;
  top: 0;
  font-size: 1.5rem;
  line-height: 1;
}

.page-about__faq-section {
  padding: 80px 0;
  background-color: var(--color-background-section);
}

details.page-about__faq-item {
  margin-bottom: 15px;
  border-radius: 5px;
  border: 1px solid var(--color-border);
  overflow: hidden;
  background: var(--color-card-bg);
  color: var(--color-text-main);
}

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: var(--color-deep-red);
}

.page-about__faq-qtext {
  flex: 1;
  font-size: 1.1rem;
  font-weight: 600;
  line-height: 1.5;
  text-align: left;
  color: var(--color-gold);
}

.page-about__faq-toggle {
  font-size: 24px;
  font-weight: bold;
  color: var(--color-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: var(--color-deep-red);
  border-radius: 0 0 5px 5px;
  color: var(--color-text-main);
}

.page-about__faq-answer p {
  margin: 0;
  font-size: 1rem;
  line-height: 1.6;
}

.page-about__contact-section {
  padding: 80px 0;
  background-color: var(--color-background-section);
  text-align: center;
}

.page-about__contact-description {
  font-size: 1.1rem;
  line-height: 1.6;
  max-width: 800px;
  margin: 0 auto 30px;
  color: var(--color-text-main);
}

.page-about__contact-info p {
  font-size: 1.1rem;
  margin-bottom: 10px;
  color: var(--color-text-main);
}

.page-about__contact-info strong {
  color: var(--color-gold);
}

/* Universal image responsive styles */
.page-about img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* --- Media Queries --- */

@media (max-width: 1024px) {
  .page-about__hero-title {
    font-size: clamp(2rem, 4.5vw, 3rem);
  }
  .page-about__hero-description {
    font-size: 1rem;
  }
  .page-about__content-grid,
  .page-about__content-wrapper {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  .page-about__image-wrapper {
    order: -1; /* Image appears above text on smaller screens */
  }
  .page-about__sub-title {
    font-size: 1.6rem;
  }
  .page-about__feature-card .page-about__card-title {
    font-size: 1.3rem;
  }
  .page-about__product-card .page-about__card-title {
    font-size: 1.2rem;
  }
  .page-about__product-image {
    height: 200px;
  }
}

@media (max-width: 849px) {
  .page-about__hero-image {
    object-fit: contain !important;
    aspect-ratio: unset !important;
    height: auto !important;
  }
}

@media (max-width: 768px) {
  /* HERO 主图区域 */
  .page-about__hero-section {
    padding-bottom: 30px;
    padding-top: 10px; /* Consistent small top padding */
  }
  .page-about__hero-title {
    font-size: clamp(1.8rem, 7vw, 2.5rem);
    margin-bottom: 15px;
  }
  .page-about__hero-description {
    font-size: 0.95rem;
    margin-bottom: 25px;
  }
  .page-about__cta-buttons {
    flex-direction: column;
    gap: 15px;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    padding: 0 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"] {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    white-space: normal !important;
    word-wrap: break-word !important;
    padding: 12px 20px;
    font-size: 1rem;
  }
  .page-about__cta-buttons,
  .page-about__button-group,
  .page-about__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;
  }

  .page-about__container {
    padding: 30px 15px;
  }
  .page-about__section-title {
    font-size: clamp(1.6rem, 6vw, 2.2rem);
    margin-bottom: 30px;
  }

  /* 通用图片与容器 */
  .page-about img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
  }
  .page-about__image-wrapper,
  .page-about__content-grid,
  .page-about__content-wrapper,
  .page-about__features-grid,
  .page-about__products-grid,
  .page-about__faq-list {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    overflow-x: hidden;
  }

  /* 产品展示图区域 (General card grid) */
  .page-about__products-grid {
    grid-template-columns: 1fr;
  }
  .page-about__product-card {
    margin-bottom: 20px;
  }
  .page-about__product-image {
    height: 180px;
  }

  /* 装饰主标题 + 长文 SEO 区 */
  .page-about__text-block p,
  .page-about__value-list li,
  .page-about__responsibility-list li,
  .page-about__contact-description,
  .page-about__contact-info p {
    font-size: 0.95rem;
    line-height: 1.6;
  }
  .page-about__sub-title {
    font-size: 1.4rem;
  }

  /* FAQ */
  details.page-about__faq-item summary.page-about__faq-question {
    padding: 15px;
  }
  .page-about__faq-qtext {
    font-size: 1rem;
  }
  .page-about__faq-toggle {
    font-size: 20px;
    width: 24px;
    margin-left: 10px;
  }
  details.page-about__faq-item .page-about__faq-answer {
    padding: 0 15px 15px;
  }
}