.page-about {
  --about-tint: rgba(14, 124, 134, 0.075);
  --about-line: rgba(216, 210, 199, 0.92);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
}

.page-about .about-topbar {
  background: var(--sand);
  border-bottom: 1px solid var(--mist);
}

.page-about .about-topbar .wrap {
  padding-top: 11px;
  padding-bottom: 11px;
}

.page-about .crumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
}

.page-about .crumbs li {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.page-about .crumbs li:not(:last-child)::after {
  content: "/";
  color: var(--mist);
}

.page-about .crumbs a {
  color: var(--teal-deep);
  text-decoration: none;
}

.page-about .crumbs a:hover,
.page-about .crumbs a:focus-visible {
  color: var(--orange-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .crumbs [aria-current="page"] {
  color: var(--ink);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  padding: clamp(30px, 5vw, 68px) 0 clamp(38px, 6vw, 84px);
  background-color: var(--sand);
  background-image:
    repeating-linear-gradient(90deg, var(--about-tint) 0 1px, transparent 1px 72px),
    repeating-linear-gradient(0deg, var(--about-tint) 0 1px, transparent 1px 72px),
    linear-gradient(165deg, rgba(241, 237, 230, 0.96) 0%, rgba(251, 249, 245, 0.85) 58%, rgba(255, 227, 214, 0.45) 100%);
  border-bottom: 1px solid var(--mist);
}

.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

.page-about .about-hero-grid > * {
  min-width: 0;
}

.page-about .about-hero-copy .eyebrow {
  margin-bottom: 0.6rem;
}

.page-about .about-hero h1 {
  margin: 0.25em 0 0.45em;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(38px, 8.6vw, 82px);
  line-height: 0.98;
  letter-spacing: -0.015em;
  color: var(--night);
}

.page-about .about-hero .lede {
  max-width: 34em;
  font-size: clamp(16px, 1.7vw, 18px);
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-about .about-hero-facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 14px;
  margin: 2rem 0 0;
  padding: 1.25rem 0 0;
  list-style: none;
  border-top: 1px solid var(--mist);
}

.page-about .about-hero-facts li {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .fact-num {
  font-size: 26px;
  line-height: 1;
  color: var(--teal-deep);
  letter-spacing: -0.02em;
}

.page-about .fact-num::after {
  content: "";
  display: block;
  width: 22px;
  height: 3px;
  margin-top: 8px;
  background: var(--orange);
}

.page-about .fact-label {
  font-size: 13px;
  line-height: 1.55;
  color: var(--ink-soft);
}

.page-about .about-hero-figure {
  margin: 0;
  position: relative;
}

.page-about .about-hero-figure::before {
  content: "";
  position: absolute;
  inset: auto -10px -10px auto;
  width: 46%;
  height: 34%;
  border-radius: var(--r-md);
  background: var(--teal);
  opacity: 0.14;
  z-index: 0;
}

.page-about .about-hero-figure img {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border-radius: var(--r-lg) var(--r-sm) var(--r-lg) var(--r-sm);
  box-shadow: var(--shadow);
  background: linear-gradient(150deg, var(--teal-dark), var(--teal));
}

.page-about .media-caption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--ink-soft);
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
}

/* ---------- 主栅格 ---------- */

.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 4vw, 54px);
  padding-top: clamp(38px, 5.5vw, 76px);
  padding-bottom: clamp(38px, 5.5vw, 76px);
}

.page-about .about-layout > * {
  min-width: 0;
}

/* ---------- 章节 ---------- */

.page-about .about-chapter {
  padding-bottom: clamp(32px, 4.5vw, 56px);
  margin-bottom: clamp(32px, 4.5vw, 56px);
  border-bottom: 1px solid var(--mist);
  scroll-margin-top: 96px;
}

.page-about .about-chapter:last-of-type {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .chapter-head {
  display: flex;
  align-items: baseline;
  gap: 0.8rem;
  margin-bottom: 1.1rem;
  flex-wrap: wrap;
}

.page-about .chapter-no {
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--orange-deep);
}

.page-about .chapter-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 4vw, 40px);
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--night);
}

.page-about .about-chapter p {
  max-width: 36em;
  margin: 0 0 1em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-about .about-chapter p:last-child {
  margin-bottom: 0;
}

.page-about .about-chapter .tip-strip {
  margin-top: 1.4rem;
  border-radius: var(--r-sm);
  border-left: 3px solid var(--teal);
  background: var(--sand);
}

.page-about .about-chapter .tip-strip summary {
  font-weight: 600;
  color: var(--teal-deep);
  cursor: pointer;
}

/* ---------- 分段标签 ---------- */

.page-about .about-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 1.5rem 0 0;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--mist);
}

.page-about .about-tabs .tab-btn {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.2;
  padding: 11px 16px;
  min-height: 44px;
  border-radius: var(--r-pill);
  border: 1px solid var(--mist);
  background: transparent;
  color: var(--ink-soft);
  cursor: pointer;
  transition: background 0.24s var(--ease), color 0.24s var(--ease), border-color 0.24s var(--ease);
}

.page-about .about-tabs .tab-btn:hover {
  border-color: var(--teal);
  color: var(--teal-deep);
}

.page-about .about-tabs .tab-btn[aria-selected="true"] {
  background: var(--teal);
  border-color: var(--teal);
  color: var(--paper);
}

.page-about .about-panel {
  padding-top: 1.1rem;
}

.page-about .about-panel p {
  max-width: 36em;
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* ---------- 团队 ---------- */

.page-about .role-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 200px), 1fr));
  gap: 14px;
  margin: 1.6rem 0 0;
}

.page-about .role {
  position: relative;
  padding: 22px 18px 18px;
  background: var(--paper);
  border: 1px solid var(--mist);
  border-radius: var(--r-md);
  box-shadow: var(--shadow);
}

.page-about .role::before {
  content: "";
  position: absolute;
  top: 12px;
  left: 18px;
  width: 22px;
  height: 3px;
  background: var(--orange);
}

.page-about .role-title {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  letter-spacing: 0.01em;
  color: var(--night);
}

.page-about .role-text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-about .about-inline-figure {
  margin: 1.8rem 0 0;
}

.page-about .about-inline-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: var(--r-md);
  background: linear-gradient(150deg, var(--mist), var(--sand));
}

/* ---------- 时间轴 ---------- */

.page-about .timeline {
  position: relative;
  margin: 1.8rem 0 0;
  padding: 0 0 0 24px;
  list-style: none;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--teal) 0%, var(--teal-deep) 55%, var(--orange) 100%);
}

.page-about .timeline li {
  position: relative;
  padding-bottom: 14px;
}

.page-about .timeline li::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 14px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--paper);
  border: 2px solid var(--teal);
}

.page-about .mile {
  border: 1px solid var(--mist);
  border-radius: var(--r-sm);
  background: var(--paper);
  overflow: hidden;
}

.page-about .mile summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.55rem;
  padding: 12px 14px;
  cursor: pointer;
  min-height: 44px;
  list-style: none;
}

.page-about .mile summary::-webkit-details-marker {
  display: none;
}

.page-about .mile summary::marker {
  content: "";
}

.page-about .mile[open] summary {
  border-bottom: 1px solid var(--mist);
  background: rgba(241, 237, 230, 0.6);
}

.page-about .mile-year {
  font-size: 15px;
  color: var(--orange-deep);
  letter-spacing: -0.02em;
}

.page-about .mile-ver {
  font-size: 12px;
  padding: 2px 8px;
  border-radius: var(--r-pill);
  background: rgba(14, 124, 134, 0.1);
  color: var(--teal-deep);
}

.page-about .mile-title {
  flex: 1 1 180px;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--ink);
}

.page-about .mile-body {
  padding: 12px 14px 14px;
}

.page-about .mile-body p {
  max-width: 40em;
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--ink-soft);
}

/* ---------- 服务地区 ---------- */

.page-about .region-panel {
  margin-top: 1.6rem;
  padding: clamp(22px, 3.4vw, 36px);
  border-radius: var(--r-lg) var(--r-sm) var(--r-lg) var(--r-sm);
  background: var(--night);
  color: rgba(251, 249, 245, 0.8);
}

.page-about .region-panel p {
  max-width: 34em;
  margin: 0 0 0.9rem;
  color: rgba(251, 249, 245, 0.78);
  font-size: 15.5px;
  line-height: 1.8;
}

.page-about .region-panel .region-lede {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(20px, 2.8vw, 26px);
  line-height: 1.4;
  color: var(--paper);
  letter-spacing: 0.005em;
}

.page-about .region-list {
  display: grid;
  gap: 10px;
  margin: 1.4rem 0 0;
  padding: 1.1rem 0 0;
  list-style: none;
  border-top: 1px solid rgba(251, 249, 245, 0.16);
}

.page-about .region-list li {
  display: flex;
  align-items: baseline;
  gap: 0.55rem;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(251, 249, 245, 0.72);
}

.page-about .region-list .mono {
  font-size: 17px;
  color: var(--orange);
  min-width: 2.2em;
}

/* ---------- 结尾行动 ---------- */

.page-about .about-cta {
  margin-top: clamp(28px, 4vw, 44px);
  padding: clamp(24px, 3.6vw, 40px);
  border-radius: var(--r-md);
  background: linear-gradient(135deg, var(--orange-soft) 0%, rgba(241, 237, 230, 0.9) 72%);
  border: 1px solid rgba(255, 107, 53, 0.28);
}

.page-about .about-cta h2 {
  margin: 0 0 0.6rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 3.2vw, 30px);
  line-height: 1.2;
  color: var(--night);
}

.page-about .about-cta p {
  max-width: 36em;
  margin: 0 0 1.4rem;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-about .about-cta-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-cta-links .btn {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* ---------- 边注 ---------- */

.page-about .about-aside {
  display: grid;
  gap: 16px;
  align-self: start;
}

.page-about .about-index-card,
.page-about .about-file-card {
  padding: 18px;
  border-radius: var(--r-md);
  background: var(--paper);
  border: 1px solid var(--mist);
  box-shadow: var(--shadow);
}

.page-about .about-file-card--warm {
  background: var(--orange-soft);
  border-color: rgba(255, 107, 53, 0.3);
  box-shadow: none;
}

.page-about .aside-title {
  margin: 0 0 0.85rem;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--teal-deep);
}

.page-about .about-file-card--warm .aside-title {
  color: var(--orange-deep);
}

.page-about .about-index {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 2px;
}

.page-about .about-index a {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  padding: 8px 6px;
  border-radius: var(--r-xs);
  font-size: 14.5px;
  line-height: 1.5;
  color: var(--ink);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .about-index a:hover,
.page-about .about-index a:focus-visible {
  background: rgba(14, 124, 134, 0.08);
  border-left-color: var(--orange);
  color: var(--teal-deep);
}

.page-about .about-index .mono {
  font-size: 11.5px;
  color: var(--teal);
  letter-spacing: 0.08em;
}

.page-about .file-list {
  margin: 0;
  display: grid;
  gap: 9px;
}

.page-about .file-list > div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--mist);
}

.page-about .file-list > div:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .file-list dt {
  font-size: 13px;
  color: var(--ink-soft);
}

.page-about .file-list dd {
  margin: 0;
  font-size: 14px;
  color: var(--night);
  font-weight: 600;
}

.page-about .aside-text {
  margin: 0 0 0.9rem;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--ink-soft);
}

.page-about .aside-link {
  display: block;
  padding: 9px 0;
  font-size: 14px;
  color: var(--teal-deep);
  text-decoration: none;
  border-bottom: 1px solid rgba(14, 124, 134, 0.22);
}

.page-about .aside-link:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .aside-link:hover,
.page-about .aside-link:focus-visible {
  color: var(--orange-deep);
  border-bottom-color: var(--orange);
}

/* ---------- 断点 ---------- */

@media (min-width: 720px) {
  .page-about .about-hero-facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .region-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
  }

  .page-about .region-list li {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }

  .page-about .region-list .mono {
    font-size: 24px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 0.55fr);
    align-items: start;
  }

  .page-about .about-hero-figure {
    margin-top: 26px;
  }
}

@media (min-width: 980px) {
  .page-about .about-layout {
    grid-template-columns: minmax(0, 1fr) 292px;
    gap: clamp(36px, 4vw, 60px);
    align-items: start;
  }

  .page-about .about-aside {
    position: sticky;
    top: 96px;
  }

  .page-about .role-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-tabs .tab-btn,
  .page-about .about-index a {
    transition: none;
  }
}
<<<END>>>