.page-about {
  --about-bg: var(--color-bg);
  --about-deep: var(--color-deepblue);
  --about-accent: var(--color-orange);
  --about-teal: var(--color-teal);
  --about-gold: var(--color-gold);
  --about-body: var(--color-body);
  --about-mono: var(--font-mono);
  --about-border: rgba(15, 43, 70, 0.14);
  background:
    linear-gradient(135deg, rgba(0, 212, 170, 0.04) 0%, transparent 40%),
    linear-gradient(315deg, rgba(255, 107, 53, 0.04) 0%, transparent 40%),
    var(--about-bg);
}

.page-about .about-shell {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: start;
  padding: 1.5rem 1.25rem 4rem;
  max-width: var(--max-header);
  margin: 0 auto;
}

/* 面包屑 */
.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  margin: 0 0 1.25rem;
  padding: 0;
  font-size: 0.875rem;
  font-family: var(--font-body);
  color: var(--about-body);
}

.page-about .breadcrumb li+li::before {
  content: "/";
  margin-right: 0.5rem;
  opacity: 0.5;
}

.page-about .breadcrumb a {
  color: var(--about-deep);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

.page-about .breadcrumb a:hover {
  border-bottom-color: var(--about-accent);
}

/* 目录面板 */
.page-about .about-toc {
  position: relative;
  border-left: 2px solid var(--about-deep);
  padding: 1.25rem 0 1.25rem 1rem;
}

.page-about .about-toc__eyebrow {
  font-family: var(--about-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--about-accent);
  margin: 0 0 0.5rem;
}

.page-about .about-toc__line {
  display: block;
  width: 2.5rem;
  height: 2px;
  background: var(--about-accent);
  margin-bottom: 1.25rem;
}

.page-about .about-toc__nav {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.page-about .about-toc__link {
  font-family: var(--about-mono);
  font-size: 0.875rem;
  color: var(--about-body);
  text-decoration: none;
  padding: 0.35rem 0;
  border-bottom: 1px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease, padding-left 0.15s ease;
}

.page-about .about-toc__link:hover,
.page-about .about-toc__link[data-active] {
  color: var(--about-deep);
  border-bottom-color: var(--about-accent);
  padding-left: 0.5rem;
}

.page-about .about-toc__note {
  margin-top: 1.25rem;
  font-size: 0.75rem;
  color: var(--about-gold);
  font-family: var(--about-mono);
  letter-spacing: 0.06em;
}

/* 内容区 */
.page-about .about-content {
  min-width: 0;
}

/* 首屏 */
.page-about .about-hero {
  position: relative;
  background: var(--about-deep);
  color: #fff;
  padding: 1.75rem 1.25rem 2.25rem;
  margin-bottom: 2.5rem;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 1.5rem), 0 100%);
}

.page-about .about-hero__index {
  font-family: var(--about-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--about-teal);
  margin: 0 0 1rem;
}

.page-about .about-hero h1 {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: clamp(1.5rem, 5vw, 2.5rem);
  line-height: 1.25;
  margin: 0 0 1rem;
  color: #fff;
  max-width: 10em;
}

.page-about .about-hero__lead {
  font-size: 1rem;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.85);
  max-width: 38em;
  margin: 0;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 40%;
  height: 0.35rem;
  background: var(--about-accent);
}

/* 章节通用 */
.page-about .about-section {
  margin-bottom: 3.5rem;
}

.page-about .about-section__title {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(1.25rem, 3vw, 1.875rem);
  color: var(--about-deep);
  margin: 0 0 1.25rem;
  padding-bottom: 0.875rem;
  border-bottom: 2px solid var(--about-border);
}

.page-about .about-section__no {
  font-family: var(--about-mono);
  font-size: 0.875rem;
  color: var(--about-accent);
  font-weight: 400;
}

.page-about .about-section__intro {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--about-body);
  max-width: 45em;
  margin: 0 0 1.25rem;
}

.page-about .about-section p {
  color: var(--about-body);
  line-height: 1.75;
}

/* 品牌故事 */
.page-about .about-story,
.page-about .about-team,
.page-about .about-local {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.page-about .about-story__text p,
.page-about .about-team__text p,
.page-about .about-local__text p {
  margin: 0 0 1rem;
}

.page-about .about-story__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.25rem;
}

.page-about .about-story__facts span {
  font-family: var(--about-mono);
  font-size: 0.8125rem;
  color: var(--about-deep);
  background: rgba(15, 43, 70, 0.06);
  border: 1px solid var(--about-border);
  padding: 0.3rem 0.65rem;
}

.page-about .about-story__media figcaption {
  font-size: 0.8125rem;
  color: var(--about-body);
  margin-top: 0.5rem;
  font-family: var(--font-body);
}

.page-about .about-story__media img,
.page-about .about-team__media img,
.page-about .about-local__media img {
  width: 100%;
  max-width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

.page-about .about-story__media img {
  clip-path: polygon(0 0, 100% 0, 100% 88%, 88% 100%, 0 100%);
}

.page-about .about-team__media img {
  clip-path: polygon(6% 0, 100% 0, 100% 100%, 0 88%);
}

.page-about .about-local__media img {
  clip-path: polygon(0 0, 92% 0, 100% 100%, 0 100%);
}

/* 时间轴 */
.page-about .about-timeline {
  position: relative;
  padding-left: 1.75rem;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 0.375rem;
  top: 0.5rem;
  bottom: 0.5rem;
  width: 2px;
  background: var(--about-deep);
  opacity: 0.2;
}

.page-about .about-timeline__item {
  position: relative;
  margin-bottom: 1.5rem;
  padding-left: 1rem;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -1.9rem;
  top: 0.375rem;
  width: 0.875rem;
  height: 0.875rem;
  background: var(--about-accent);
  transform: rotate(45deg);
  border: 2px solid #fff;
  box-shadow: 0 0 0 2px var(--about-accent);
}

.page-about .about-timeline__year {
  font-family: var(--about-mono);
  font-weight: 600;
  font-size: 1rem;
  color: var(--about-deep);
  margin-bottom: 0.25rem;
}

.page-about .about-timeline__content {
  background: #fff;
  border: 1px solid var(--about-border);
  padding: 0.875rem 1rem;
  position: relative;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.page-about .about-timeline__content:hover {
  transform: translateX(0.25rem);
  box-shadow: 4px 4px 0 rgba(15, 43, 70, 0.08);
}

.page-about .about-timeline__content h3 {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  margin: 0 0 0.25rem;
  color: var(--about-deep);
}

.page-about .about-timeline__content p {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--about-body);
}

/* 认证卡片 */
.page-about .about-assure-card {
  height: 100%;
}

.page-about .about-assure-card__tag {
  display: inline-block;
  font-family: var(--about-mono);
  font-size: 0.75rem;
  color: var(--about-orange);
  letter-spacing: 0.04em;
  border: 1px solid var(--about-accent);
  padding: 0.2rem 0.5rem;
  background: rgba(255, 107, 53, 0.05);
  margin-bottom: 0.75rem;
}

.page-about .about-assure-card h3 {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--about-deep);
  margin: 0 0 0.5rem;
}

.page-about .about-assure-card p {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.75;
}

.page-about .about-assure-strip {
  margin-top: 1.5rem;
  background: var(--about-deep);
  padding: 1rem 1.25rem;
  color: #fff;
  font-family: var(--about-mono);
  font-size: 0.875rem;
  letter-spacing: 0.02em;
  clip-path: polygon(0 0, calc(100% - 0.75rem) 0, 100% 0.75rem, 100% 100%, 0.75rem 100%, 0 calc(100% - 0.75rem));
}

/* 团队 */
.page-about .about-team__text ul {
  list-style: none;
  padding: 0;
  margin: 0 0 1rem;
}

.page-about .about-team__text li {
  padding-left: 1.25rem;
  position: relative;
  margin-bottom: 0.5rem;
  color: var(--about-body);
  line-height: 1.7;
}

.page-about .about-team__text li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55rem;
  width: 10px;
  height: 2px;
  background: var(--about-accent);
}

.page-about .about-team__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-top: 2rem;
}

.page-about .about-stat {
  background: #fff;
  border: 1px solid var(--about-border);
  padding: 1rem;
  text-align: center;
  border-left: 4px solid var(--about-accent);
}

.page-about .about-stat .metric {
  display: block;
  font-family: var(--about-mono);
  font-weight: 600;
  font-size: 1.5rem;
  color: var(--about-deep);
  line-height: 1.2;
}

.page-about .about-stat__label {
  display: block;
  margin-top: 0.375rem;
  font-size: 0.8125rem;
  color: var(--about-body);
}

/* 地域 */
.page-about .about-local__text p:first-child::first-line {
  font-weight: 600;
  color: var(--about-deep);
}

.page-about .about-local__contact {
  font-family: var(--about-mono);
  font-size: 0.875rem;
  background: rgba(201, 169, 106, 0.12);
  border-left: 3px solid var(--about-gold);
  padding: 0.75rem 1rem;
  color: var(--about-deep);
}

.page-about .about-crosslinks {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 3rem;
  padding-top: 1.75rem;
  border-top: 2px solid var(--about-border);
}

.page-about .about-crosslinks .btn {
  text-decoration: none;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.9375rem;
  padding: 0.65rem 1.25rem;
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}

.page-about .about-crosslinks .btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(15, 43, 70, 0.12);
}

/* 桌面端 */
@media (min-width: 900px) {
  .page-about .about-shell {
    grid-template-columns: 220px 1fr;
    gap: 3rem;
    padding: 2.5rem 2rem 5rem;
  }

  .page-about .about-toc {
    position: sticky;
    top: 2rem;
    border-left: 2px solid var(--about-deep);
    padding-left: 1.5rem;
    margin-top: 0.5rem;
  }

  .page-about .about-hero {
    padding: 2.5rem 3rem 3rem;
    margin-bottom: 3rem;
  }

  .page-about .about-story,
  .page-about .about-team,
  .page-about .about-local {
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
    align-items: center;
  }

  .page-about .about-local {
    grid-template-columns: 0.85fr 1.15fr;
  }

  .page-about .about-team__stats {
    grid-template-columns: repeat(4, 1fr);
    gap: 1.25rem;
  }

  .page-about .about-team__stats .about-stat .metric {
    font-size: 1.75rem;
  }

  .page-about .about-timeline__content {
    padding: 1.125rem 1.375rem;
  }
}

@media (max-width: 639px) {
  .page-about .about-hero--lead {
    font-size: 0.9375rem;
  }

  .page-about .about-shell,
  .page-about .about-content {
    overflow-x: hidden;
  }

  .page-about .about-section__title {
    flex-wrap: wrap;
    gap: 0.375rem 0.75rem;
  }

  .page-about .about-timeline__content p,
  .page-about .about-assure-card p,
  .page-about .about-team__text li {
    font-size: 0.875rem;
  }
}

.page-about {
  --about-orange: var(--about-border);
}