.page-about {
  --about-rule: 1px solid var(--sand-line);
  --about-gap: clamp(20px, 4vw, 48px);
  background: var(--paper);
  color: var(--ink);
}

.page-about h1,
.page-about h2,
.page-about h3 {
  margin: 0;
  font-weight: 300;
  letter-spacing: -0.01em;
}

.page-about p {
  margin: 0;
}

.page-about a {
  color: inherit;
}

.page-about .about-breadcrumb {
  padding-top: 14px;
}

/* ---------- HERO ---------- */
.page-about .about-hero {
  padding-block: clamp(18px, 4vw, 40px) clamp(36px, 6vw, 76px);
}

.page-about .about-hero__grid {
  display: grid;
  gap: var(--about-gap);
}

.page-about .about-hero__text {
  display: grid;
  gap: 18px;
  align-content: start;
}

.page-about .about-hero h1 {
  font-size: clamp(2.2rem, 8vw, 4.6rem);
  font-weight: 200;
  line-height: 1.1;
  text-wrap: balance;
}

.page-about .about-hero h1 em {
  font-style: normal;
  background-image: linear-gradient(transparent 62%, var(--amber-mist) 62%);
  background-repeat: no-repeat;
  background-size: 100% 100%;
}

.page-about .about-hero__lead {
  max-width: 48ch;
  font-size: clamp(1rem, 2.4vw, 1.0625rem);
  line-height: 1.9;
  color: var(--ink);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 4px;
}

.page-about .about-hero__marks {
  display: grid;
  gap: 10px;
  margin: 8px 0 0;
  padding: 16px 0 0;
  list-style: none;
  border-top: var(--about-rule);
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--moss);
}

.page-about .about-hero__marks li {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.page-about .about-hero__marks .label-mono {
  color: var(--grass);
}

.page-about .about-hero__figure {
  margin: 0;
  border: var(--line);
  box-shadow: var(--shadow-hard);
  background: var(--sky-mist);
}

.page-about .about-hero__figure .figure__media {
  overflow: hidden;
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 16 / 10;
}

.page-about .about-hero__figure .figure__caption {
  padding: 10px 14px;
  border-top: var(--line);
  background: var(--paper);
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--moss);
}

/* ---------- 通用区块头 ---------- */
.page-about .about-head {
  display: grid;
  gap: 12px;
  max-width: 60ch;
  margin-bottom: clamp(24px, 4vw, 44px);
}

.page-about .about-head h2 {
  font-size: clamp(1.55rem, 4.4vw, 2.5rem);
  line-height: 1.25;
  font-weight: 250;
}

.page-about .about-head__lead {
  font-size: 1rem;
  line-height: 1.9;
  color: var(--moss);
}

.page-about .label-mono {
  color: var(--moss);
}

/* ---------- 使命主张 ---------- */
.page-about .about-mission__grid {
  display: grid;
  gap: 0;
  border-top: var(--line);
}

.page-about .about-mission__item {
  padding: 22px 0;
  border-bottom: var(--about-rule);
}

.page-about .about-mission__item:last-child {
  border-bottom: var(--line);
}

.page-about .about-mission__no {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  color: var(--paper);
  background: var(--grass);
  padding: 3px 8px;
  border-radius: 4px;
}

.page-about .about-mission__item h3 {
  margin: 14px 0 10px;
  font-size: clamp(1.15rem, 3vw, 1.375rem);
  font-weight: 500;
}

.page-about .about-mission__item p {
  font-size: 1rem;
  line-height: 1.9;
  color: var(--moss);
}

.page-about .about-mission__note {
  margin-top: clamp(24px, 4vw, 36px);
}

/* ---------- 发展历程 ---------- */
.page-about .about-history__layout {
  display: grid;
  gap: clamp(20px, 3vw, 40px);
}

.page-about .about-years {
  position: static;
}

.page-about .about-years__title {
  margin-bottom: 10px;
}

.page-about .about-years ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-years .toc-link {
  display: inline-block;
  padding: 5px 12px;
  border: var(--about-rule);
  border-radius: 999px;
  background: var(--paper);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-decoration: none;
  color: var(--moss);
  transition: background-color 150ms ease, color 150ms ease, border-color 150ms ease;
}

.page-about .about-years .toc-link:hover,
.page-about .about-years .toc-link[aria-current] {
  background: var(--grass);
  border-color: var(--grass);
  color: var(--paper);
}

.page-about .about-timeline {
  display: grid;
  gap: clamp(22px, 3vw, 34px);
  border-left: 1px solid var(--sand-line);
  padding-left: clamp(18px, 3vw, 30px);
}

.page-about .about-node {
  position: relative;
  display: grid;
  gap: 8px;
  scroll-margin-top: 90px;
}

.page-about .about-node::before {
  content: "";
  position: absolute;
  left: calc(clamp(18px, 3vw, 30px) * -1 - 6px);
  top: 6px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--sand);
  border: 2px solid var(--grass);
}

.page-about .about-node h3 {
  font-size: clamp(1.125rem, 3vw, 1.5rem);
  font-weight: 500;
  line-height: 1.4;
}

.page-about .about-node p {
  font-size: 1rem;
  line-height: 1.9;
  color: var(--ink);
  max-width: 62ch;
}

.page-about .about-node--now::before {
  background: var(--amber);
  border-color: var(--amber);
}

.page-about .about-node__more {
  margin-top: 4px;
  border-top: var(--about-rule);
  padding-top: 10px;
  max-width: 62ch;
}

.page-about .about-node__more summary {
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--grass);
}

.page-about .about-node__more summary::marker {
  color: var(--grass);
}

.page-about .about-node__more p {
  margin-top: 10px;
  font-size: 0.9375rem;
  color: var(--moss);
}

.page-about .about-history__figure {
  margin: 6px 0 0;
  border: var(--line);
  background: var(--sky-mist);
}

.page-about .about-history__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 12 / 7;
  object-fit: cover;
}

.page-about .about-history__figure .figure__caption {
  padding: 10px 14px;
  border-top: var(--line);
  background: var(--paper);
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--moss);
}

/* ---------- 服务台账 ---------- */
.page-about .about-ledger__wrap {
  overflow-x: auto;
  border: var(--line);
  background: var(--paper);
}

.page-about .about-ledger__table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  font-size: 0.9375rem;
  line-height: 1.75;
  text-align: left;
}

.page-about .about-ledger__table caption {
  padding: 12px 16px;
  text-align: left;
  border-bottom: var(--about-rule);
  background: var(--sand);
}

.page-about .about-ledger__table thead th {
  padding: 12px 16px;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  white-space: nowrap;
}

.page-about .about-ledger__table tbody th {
  padding: 14px 16px;
  font-weight: 500;
  white-space: nowrap;
  color: var(--ink);
  border-bottom: var(--about-rule);
}

.page-about .about-ledger__table tbody td {
  padding: 14px 16px;
  border-bottom: var(--about-rule);
  color: var(--moss);
}

.page-about .about-ledger__table tbody td:nth-child(2) {
  color: var(--grass);
  font-family: var(--font-mono);
  font-weight: 500;
  white-space: nowrap;
}

.page-about .about-ledger__table tbody tr:last-child th,
.page-about .about-ledger__table tbody tr:last-child td {
  border-bottom: 0;
}

.page-about .about-ledger__table tbody tr:nth-child(even) {
  background: var(--sand);
  background: color-mix(in srgb, var(--sand) 45%, var(--paper));
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: 16px;
}

.page-about .about-team__item {
  padding: 20px;
  border: var(--about-rule);
  border-left: var(--line);
  background: var(--paper);
}

.page-about .about-team__num {
  font-family: var(--font-mono);
  font-size: clamp(1.8rem, 6vw, 2.5rem);
  font-weight: 500;
  line-height: 1;
  color: var(--grass);
}

.page-about .about-team__item h3 {
  margin: 10px 0 8px;
  font-size: 1.0625rem;
  font-weight: 500;
}

.page-about .about-team__item p {
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--moss);
}

/* ---------- 服务原则 ---------- */
.page-about .about-principles__list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: var(--line);
}

.page-about .about-principles__item {
  display: grid;
  gap: 8px;
  padding: 20px 0;
  border-bottom: var(--about-rule);
}

.page-about .about-principles__item:last-child {
  border-bottom: var(--line);
}

.page-about .about-principles__item h3 {
  font-size: clamp(1.125rem, 3vw, 1.375rem);
  font-weight: 500;
}

.page-about .about-principles__item p {
  font-size: 1rem;
  line-height: 1.9;
  color: var(--moss);
  max-width: 62ch;
}

/* ---------- 区域服务 ---------- */
.page-about .about-region__grid {
  display: grid;
  gap: var(--about-gap);
}

.page-about .about-region__text {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-about .about-region__text h2 {
  font-size: clamp(1.55rem, 4.4vw, 2.4rem);
  line-height: 1.25;
  font-weight: 250;
}

.page-about .about-region__text p {
  font-size: 1rem;
  line-height: 1.9;
}

.page-about .about-region__list {
  display: grid;
  gap: 10px;
  margin: 4px 0;
  padding: 0;
  list-style: none;
}

.page-about .about-region__list li {
  padding-left: 16px;
  border-left: 3px solid var(--grass);
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--moss);
}

.page-about .about-region__list strong {
  color: var(--ink);
  font-weight: 500;
}

.page-about .about-region__text .btn {
  justify-self: start;
  margin-top: 6px;
}

.page-about .about-region__figure {
  margin: 0;
  border: var(--line);
  background: var(--paper);
}

.page-about .about-region__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.page-about .about-region__figure .figure__caption {
  padding: 10px 14px;
  border-top: var(--line);
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--moss);
}

/* ---------- 荣誉与下一步 ---------- */
.page-about .about-honor__grid {
  display: grid;
  gap: clamp(20px, 3vw, 36px);
}

.page-about .about-honor__block {
  padding: clamp(20px, 4vw, 32px);
  border: var(--line);
  box-shadow: var(--shadow-hard);
  background: var(--amber-mist);
}

.page-about .about-honor__block h2 {
  margin: 10px 0 12px;
  font-size: clamp(1.4rem, 4vw, 2rem);
  font-weight: 400;
  line-height: 1.3;
}

.page-about .about-honor__block p {
  font-size: 0.9375rem;
  line-height: 1.9;
  color: var(--ink);
}

.page-about .about-next {
  display: grid;
  gap: 12px;
  align-content: start;
  padding: clamp(20px, 4vw, 32px);
  border: var(--about-rule);
  background: var(--paper);
}

.page-about .about-next h3 {
  font-size: clamp(1.2rem, 3vw, 1.5rem);
  font-weight: 500;
}

.page-about .about-next p {
  font-size: 0.9375rem;
  line-height: 1.9;
  color: var(--moss);
}

.page-about .about-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 6px;
}

/* ---------- 收束 ---------- */
.page-about .about-finale {
  padding-bottom: clamp(48px, 7vw, 96px);
}

.page-about .about-finale__label {
  color: var(--grass);
}

.page-about .about-finale__statement {
  margin-top: 16px;
  font-size: clamp(1.5rem, 5.6vw, 3.4rem);
  font-weight: 200;
  line-height: 1.35;
  letter-spacing: 0.01em;
  text-wrap: balance;
}

.page-about .about-finale__foot {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 18px;
  margin-top: clamp(22px, 4vw, 36px);
  padding-top: 18px;
  border-top: var(--about-rule);
}

.page-about .about-finale__foot p {
  max-width: 52ch;
  font-size: 0.9375rem;
  line-height: 1.9;
  color: var(--moss);
}

.page-about .about-top {
  flex: 0 0 auto;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-mission__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 0;
  }

  .page-about .about-mission__item {
    padding: 24px 22px 26px;
    border-bottom: var(--line);
    border-right: var(--about-rule);
  }

  .page-about .about-mission__item:first-child {
    padding-left: 0;
  }

  .page-about .about-mission__item:last-child {
    padding-right: 0;
    border-right: 0;
  }

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

  .page-about .about-principles__list {
    grid-template-columns: repeat(2, 1fr);
    column-gap: clamp(24px, 4vw, 56px);
  }

  .page-about .about-principles__item:nth-last-child(2) {
    border-bottom: var(--line);
  }

  .page-about .about-honor__grid {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: 1.02fr 0.98fr;
    align-items: start;
  }

  .page-about .about-hero__figure {
    margin-top: 12px;
  }

  .page-about .about-history__layout {
    grid-template-columns: 132px 1fr;
    align-items: start;
  }

  .page-about .about-years {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }

  .page-about .about-years ol {
    flex-direction: column;
    gap: 6px;
  }

  .page-about .about-years .toc-link {
    display: block;
    border-radius: 4px;
    padding: 4px 10px;
    border-color: transparent;
    background: transparent;
  }

  .page-about .about-years .toc-link:hover,
  .page-about .about-years .toc-link[aria-current] {
    border-color: var(--grass);
  }

  .page-about .about-team__grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about .about-region__grid {
    grid-template-columns: 1.15fr 0.85fr;
    align-items: start;
  }

  .page-about .about-ledger__table {
    min-width: 0;
  }
}

@media (min-width: 1180px) {
  .page-about .about-hero__grid {
    grid-template-columns: 1fr 1.05fr;
    gap: 64px;
  }

  .page-about .about-mission__item {
    padding-inline: clamp(24px, 3vw, 40px);
  }

  .page-about .about-hero__lead {
    font-size: 1.125rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-years .toc-link {
    transition: none;
  }
}