.page-about {
  --about-color-accent: #D93623;
  --about-color-gold: #C9975A;
  --about-color-primary: #1A3A5C;
  --about-color-text: #1C1C1E;
  --about-color-text-light: #B0B8C4;
  --about-color-bg: #F5F7FA;
  --about-font-heading: 'Noto Sans SC Bold', 'PingFang SC Semibold', sans-serif;
  --about-font-body: 'Noto Sans SC', 'PingFang SC', sans-serif;
  --about-font-numeric: 'JetBrains Mono', monospace;
  --about-radius-lg: 20px;
  --about-radius-md: 12px;
  --about-shadow-card: 0 8px 24px rgba(0,0,0,0.12);
  --about-transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  line-height: 1.6;
  color: var(--about-color-text);
}

/* 首屏英雄区 */
.about-hero {
  padding-top: 2rem;
  padding-bottom: 0;
}
.about-hero__inner {
  position: relative;
}
.about-hero__image-wrapper {
  margin: 0 auto;
  border-radius: var(--about-radius-lg);
  overflow: hidden;
  max-width: 100%;
}
.about-hero__image {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  max-height: 400px;
}
.about-hero__text-block {
  margin-top: -2rem;
  position: relative;
  z-index: 2;
  padding: 1.5rem 1.5rem 1rem;
  background: var(--about-color-bg);
  border-radius: var(--about-radius-lg) var(--about-radius-lg) 0 0;
  max-width: 480px;
}
.about-hero__kicker {
  margin-bottom: 0.5rem;
  display: inline-block;
}
.about-hero__title {
  font-family: var(--about-font-heading);
  font-size: 2rem;
  line-height: 1.2;
  color: var(--about-color-primary);
  margin: 0.25rem 0;
}
.about-hero__subtitle {
  font-family: var(--about-font-body);
  font-size: 1rem;
  color: var(--about-color-text-light);
  margin: 0.5rem 0 0;
  letter-spacing: 0.02em;
}

/* 品牌故事 */
.about-story {
  padding-top: 2.5rem;
  padding-bottom: 2rem;
}
.about-story__grid {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}
.about-story__heading {
  margin-bottom: 1rem;
}
.about-story__text {
  font-family: var(--about-font-body);
  font-size: 1rem;
  line-height: 1.7;
  margin-bottom: 1rem;
  color: var(--about-color-text);
}
.about-story__note {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  padding: 1rem 1.25rem;
  background: rgba(201, 151, 90, 0.08);
  border-radius: var(--about-radius-md);
  border-left: 4px solid var(--about-color-gold);
}
.about-story__note-icon {
  color: var(--about-color-gold);
  font-size: 1.25rem;
  flex-shrink: 0;
  line-height: 1.4;
}
.about-story__note-text {
  font-family: var(--about-font-body);
  font-size: 0.9rem;
  color: var(--about-color-primary);
  margin: 0;
}
.about-story__aside-card {
  background: #FFFFFF;
  border-radius: var(--about-radius-lg);
  padding: 1.5rem;
  box-shadow: var(--about-shadow-card);
  border: 1px solid rgba(201, 151, 90, 0.2);
}
.about-story__aside-label {
  display: block;
  font-family: var(--about-font-heading);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--about-color-gold);
  margin-bottom: 1rem;
}
.about-story__aside-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.about-story__aside-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--about-font-body);
  font-size: 0.95rem;
  color: var(--about-color-text);
}
.icon-dot--blue { background: #1A3A5C; }
.icon-dot--red { background: #D93623; }
.icon-dot--gold { background: #C9975A; }
.icon-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* 分割线 */
.about-divider {
  padding: 0.5rem 0;
}
.divider-gold {
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--about-color-gold), transparent);
  width: 60%;
  margin: 0 auto;
  border-radius: 2px;
}

/* 服务特色 */
.about-services {
  padding-top: 2.5rem;
  padding-bottom: 2.5rem;
}
.about-services__heading {
  margin-bottom: 1.5rem;
}
.about-services__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}
.about-services__item {
  padding: 1.5rem;
  background: #FFFFFF;
  border-radius: var(--about-radius-lg);
  box-shadow: var(--about-shadow-card);
  border: 1px solid rgba(26, 58, 92, 0.06);
  transition: transform var(--about-transition), box-shadow var(--about-transition);
}
.about-services__item:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(0,0,0,0.16);
}
.about-services__item-icon {
  margin-bottom: 0.75rem;
  width: 40px;
  height: 40px;
}
.about-services__item-title {
  font-family: var(--about-font-heading);
  font-size: 1.1rem;
  color: var(--about-color-primary);
  margin: 0 0 0.5rem;
}
.about-services__item-desc {
  font-family: var(--about-font-body);
  font-size: 0.9rem;
  color: var(--about-color-text);
  line-height: 1.5;
  margin-bottom: 1rem;
}
.about-services__item-meta {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  align-items: center;
}
.about-services__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  margin-top: 2rem;
}

/* 数据理念 */
.about-data {
  padding-top: 2.5rem;
  padding-bottom: 2.5rem;
}
.about-data__inner {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}
.about-data__heading {
  margin-bottom: 1rem;
}
.about-data__text {
  font-family: var(--about-font-body);
  font-size: 1rem;
  line-height: 1.7;
  margin-bottom: 1.5rem;
}
.about-data__highlights {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
}
.about-data__highlight {
  flex: 1 1 120px;
  background: #FFFFFF;
  border-radius: var(--about-radius-md);
  padding: 1.25rem 1rem;
  text-align: center;
  box-shadow: 0 4px 12px rgba(0,0,0,0.06);
  border: 1px solid rgba(201, 151, 90, 0.15);
}
.about-data__value {
  font-family: var(--about-font-numeric);
  font-size: 2rem;
  color: var(--about-color-accent);
  display: block;
  line-height: 1;
}
.about-data__value small {
  font-size: 0.7em;
  font-family: var(--about-font-body);
  color: var(--about-color-text-light);
  margin-left: 0.15em;
}
.about-data__label {
  font-family: var(--about-font-body);
  font-size: 0.8rem;
  color: var(--about-color-primary);
  margin-top: 0.4rem;
  display: block;
}
.about-data__image-wrapper {
  border-radius: var(--about-radius-lg);
  overflow: hidden;
  max-width: 100%;
}
.about-data__image {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--about-radius-lg);
}

/* 时间轴 */
.about-timeline {
  padding-top: 2.5rem;
  padding-bottom: 2rem;
}
.about-timeline__heading {
  margin-bottom: 0.5rem;
}
.about-timeline__intro {
  font-family: var(--about-font-body);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}
.about-timeline__track {
  position: relative;
  padding-left: 2rem;
}
.about-timeline__track::before {
  content: '';
  position: absolute;
  left: 10px;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, #1A3A5C, #C9975A, #D93623, #1A3A5C);
  border-radius: 3px;
  animation: about-timeline-wave 6s ease-in-out infinite;
}
@keyframes about-timeline-wave {
  0%, 100% { opacity: 0.6; }
  50% { opacity: 1; }
}
.about-timeline__item {
  position: relative;
  margin-bottom: 1.5rem;
  cursor: pointer;
}
.about-timeline__dot {
  position: absolute;
  left: -2rem;
  top: 0.7rem;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--about-color-gold);
  border: 3px solid #FFFFFF;
  box-shadow: 0 0 0 2px var(--about-color-primary);
  z-index: 1;
}
.about-timeline__node {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.75rem 1rem;
  background: #FFFFFF;
  border-radius: var(--about-radius-md);
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
  border: 1px solid rgba(26, 58, 92, 0.08);
  transition: box-shadow var(--about-transition);
}
.about-timeline__node:hover {
  box-shadow: var(--about-shadow-card);
}
.about-timeline__marker {
  color: var(--about-color-gold);
  font-size: 1.1rem;
}
.about-timeline__phase {
  font-family: var(--about-font-heading);
  font-size: 0.95rem;
  color: var(--about-color-primary);
  flex: 1;
}
.about-timeline__arrow {
  font-size: 0.85rem;
  color: var(--about-color-text-light);
  transition: transform var(--about-transition);
}
.about-timeline__item[data-expanded="true"] .about-timeline__arrow {
  transform: rotate(90deg);
}
.about-timeline__content {
  overflow: hidden;
  max-height: 0;
  transition: max-height 0.4s ease;
  padding-left: 1rem;
}
.about-timeline__item[data-expanded="true"] .about-timeline__content {
  max-height: 200px;
}
.about-timeline__detail {
  font-family: var(--about-font-body);
  font-size: 0.9rem;
  color: var(--about-color-text);
  line-height: 1.6;
  padding: 0.5rem 0 0.25rem;
  margin: 0;
  border-left: 2px solid var(--about-color-gold);
  padding-left: 1rem;
}

/* 底部CTA */
.about-cta-block {
  padding-top: 1rem;
  padding-bottom: 3rem;
}
.about-cta-block__inner {
  text-align: center;
  padding: 2rem 1.5rem;
  background: #FFFFFF;
  border-radius: var(--about-radius-lg);
  box-shadow: var(--about-shadow-card);
  border: 1px solid rgba(201, 151, 90, 0.2);
}
.about-cta-block__text {
  font-family: var(--about-font-body);
  font-size: 1.1rem;
  color: var(--about-color-primary);
  margin: 0 0 1.25rem;
}
.about-cta-block__links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
}

/* 媒体查询 */
@media (min-width: 768px) {
  .about-hero__image {
    max-height: 500px;
  }
  .about-hero__text-block {
    margin-top: -3rem;
    padding: 2rem 2.5rem;
    max-width: 600px;
  }
  .about-hero__title {
    font-size: 2.5rem;
  }
  .about-hero__subtitle {
    font-size: 1.15rem;
  }

  .about-story__grid {
    flex-direction: row;
    align-items: flex-start;
    gap: 3rem;
  }
  .about-story__main {
    flex: 2;
  }
  .about-story__aside {
    flex: 1;
    max-width: 320px;
  }

  .about-services__grid {
    grid-template-columns: 1fr 1fr;
  }

  .about-data__inner {
    flex-direction: row;
    align-items: center;
    gap: 3rem;
  }
  .about-data__content {
    flex: 1;
  }
  .about-data__image-wrapper {
    flex: 1;
    max-width: 500px;
  }
  .about-data__image {
    max-height: 400px;
  }

  .about-timeline__track {
    max-width: 600px;
    margin: 0 auto;
  }
  .about-timeline__node {
    padding: 1rem 1.25rem;
  }
}

@media (min-width: 1024px) {
  .about-services__grid {
    grid-template-columns: repeat(4, 1fr);
  }
  .about-hero__image {
    max-height: 600px;
  }
  .about-hero__text-block {
    max-width: 720px;
  }
}