.page-about {
  --about-anchor-w: 176px;
  --about-accent-download: var(--glacier);
  --about-accent-docs: var(--fir);
  --about-accent-news: var(--red);
  --about-accent-support: var(--ink);
  display: block;
}

.page-about p {
  max-width: 46em;
}

/* ---------- 面包屑与首屏 ---------- */
.page-about .crumbs {
  margin: 0 0 20px;
}

.page-about .about-hero {
  position: relative;
  padding: 26px clamp(18px, 3vw, 34px) 30px;
  border: 1px solid var(--line);
  border-left: 4px solid var(--fir);
  background:
    radial-gradient(120% 130% at 8% -45%, rgba(46, 110, 158, 0.2) 0%, rgba(46, 110, 158, 0) 62%),
    linear-gradient(180deg, var(--glacier-tint) 0%, rgba(247, 245, 242, 0) 84%);
}

.page-about .about-hero__eyebrow {
  margin: 0;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--fir);
}

.page-about .about-hero h1 {
  margin: 12px 0 14px;
  font-size: clamp(1.7rem, 5.4vw, 2.9rem);
  line-height: 1.18;
  letter-spacing: -0.01em;
  font-weight: 800;
  color: var(--ink);
  max-width: 20em;
}

.page-about .about-hero__lead {
  margin: 0;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--mute);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 26px 0 0;
  padding: 0;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-stat {
  margin: 0;
  padding: 12px 14px 14px;
  background: var(--sheet);
}

.page-about .about-stat__label {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mute);
}

.page-about .about-stat__num {
  margin: 5px 0 0;
  font-size: clamp(1.35rem, 4.4vw, 1.8rem);
  font-weight: 800;
  line-height: 1.1;
  color: var(--fir);
  font-variant-numeric: tabular-nums;
}

.page-about .about-stat__num span {
  margin-left: 3px;
  font-size: 0.58em;
  font-weight: 600;
  color: var(--mute);
}

/* ---------- 主体结构：左锚点 + 右内容流 ---------- */
.page-about .about-body {
  padding-top: 6px;
}

.page-about .about-anchor {
  position: sticky;
  top: var(--topbar-h);
  z-index: 6;
  margin: 0 0 14px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
  background: rgba(247, 245, 242, 0.94);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.page-about .about-anchor::-webkit-scrollbar {
  display: none;
}

.page-about .about-anchor__title {
  display: none;
  margin: 0 0 8px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--mute);
}

.page-about .about-anchor__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  white-space: nowrap;
}

.page-about .about-anchor__list a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border: 1px solid var(--line);
  background: var(--sheet);
  font-size: 13px;
  color: var(--ink);
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-anchor__list a:hover,
.page-about .about-anchor__list a:focus-visible {
  border-color: var(--fir);
  background: var(--fir-tint);
}

.page-about .about-anchor__list a span {
  font-size: 11px;
  font-weight: 800;
  color: var(--fir);
  font-variant-numeric: tabular-nums;
}

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

/* ---------- 章节头部 ---------- */
.page-about .about-sec {
  padding: 28px 0 34px;
  border-top: 1px solid var(--line);
  scroll-margin-top: calc(var(--topbar-h) + 56px);
}

.page-about .about-sec:first-child {
  border-top: 0;
  padding-top: 12px;
}

.page-about .sec-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 16px;
  align-items: baseline;
  margin: 0 0 18px;
}

.page-about .sec-num {
  font-size: clamp(2.1rem, 6.5vw, 3.4rem);
  font-weight: 800;
  line-height: 0.9;
  color: var(--fir);
  font-variant-numeric: tabular-nums;
}

.page-about .sec-head__title {
  margin: 0;
  font-size: clamp(1.28rem, 3.6vw, 1.85rem);
  font-weight: 800;
  line-height: 1.25;
  color: var(--ink);
}

.page-about .sec-head__lead {
  grid-column: 2;
  margin: 8px 0 0;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--mute);
}

.page-about .about-flow p {
  margin: 0 0 14px;
  line-height: 1.78;
}

/* ---------- 01 受众清单 ---------- */
.page-about .about-audience {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .about-audience li {
  display: grid;
  gap: 6px;
  padding: 15px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-audience strong {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-audience span {
  font-size: 15px;
  line-height: 1.72;
  color: var(--mute);
  max-width: 44em;
}

/* ---------- 02 团队分工 ---------- */
.page-about .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 6px;
}

.page-about .filter-status {
  min-height: 1.2em;
  margin: 6px 0 0;
  font-size: 13px;
  color: var(--mute);
}

.page-about .team-list {
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.page-about .team-card {
  padding: 16px 18px 18px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--line);
  background: var(--sheet);
}

.page-about .team-card[data-tags~="download"] {
  border-left-color: var(--about-accent-download);
}

.page-about .team-card[data-tags~="docs"] {
  border-left-color: var(--about-accent-docs);
}

.page-about .team-card[data-tags~="news"] {
  border-left-color: var(--about-accent-news);
}

.page-about .team-card[data-tags~="support"] {
  border-left-color: var(--about-accent-support);
}

.page-about .team-card__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
}

.page-about .team-card__name {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--ink);
}

.page-about .team-card__count {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--mute);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.page-about .team-card p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.72;
  color: var(--mute);
}

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

/* ---------- 图片容器 ---------- */
.page-about .about-figure {
  margin: 24px 0 0;
  padding: 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border: 1px solid var(--line);
  background: var(--glacier-tint);
  object-fit: cover;
}

.page-about .about-figure figcaption {
  margin-top: 9px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mute);
}

/* ---------- 03 资料维护 ---------- */
.page-about .index-list {
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .index-list__row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 14px;
  align-items: baseline;
  padding: 16px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .index-list__num {
  font-size: clamp(1.4rem, 4vw, 1.9rem);
  font-weight: 800;
  line-height: 1;
  color: var(--fir);
  font-variant-numeric: tabular-nums;
}

.page-about .index-list__title {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .index-list__meta {
  grid-column: 2;
  margin: 5px 0 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--mute);
}

.page-about .about-split {
  margin-top: 26px;
  padding-top: 22px;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-split__text h3 {
  margin: 0 0 10px;
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--fir);
}

.page-about .about-split__text p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.76;
  color: var(--mute);
}

/* ---------- 04 路径 ---------- */
.page-about .path-map {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
  counter-reset: pathstep;
}

.page-about .path-map__step {
  position: relative;
  padding: 15px 16px 16px 56px;
  border: 1px solid var(--line);
  background: var(--sheet);
}

.page-about .path-map__step::before {
  counter-increment: pathstep;
  content: counter(pathstep, decimal-leading-zero);
  position: absolute;
  left: 16px;
  top: 15px;
  font-size: 15px;
  font-weight: 800;
  color: var(--glacier);
  font-variant-numeric: tabular-nums;
}

.page-about .path-map__step h3 {
  margin: 0 0 6px;
  font-size: 15.5px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .path-map__step p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--mute);
}

/* ---------- 05 时间线 ---------- */
.page-about .about-timeline {
  position: relative;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 18px;
}

.page-about .about-timeline__item {
  position: relative;
  padding-left: 26px;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--fir);
}

.page-about .about-timeline__item::after {
  content: "";
  position: absolute;
  left: 9px;
  top: 24px;
  bottom: -18px;
  width: 1px;
  background: var(--line);
}

.page-about .about-timeline__item:last-child::after {
  display: none;
}

.page-about .about-timeline__year {
  display: inline-block;
  margin-bottom: 7px;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--glacier);
  font-variant-numeric: tabular-nums;
}

.page-about .about-timeline__paper {
  padding: 14px 16px 16px;
  border: 1px solid var(--line);
  background: var(--sheet);
  transition: translate var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-timeline__paper:hover,
.page-about .about-timeline__paper:focus-within {
  translate: 0 -4px;
  border-color: var(--fir);
}

.page-about .about-timeline__paper h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-timeline__paper p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--mute);
}

/* ---------- 06 服务标准 ---------- */
.page-about .status-list {
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0;
}

.page-about .status-list__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0 12px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .status-list__item:first-child {
  border-top: 1px solid var(--line);
}

.page-about .status-dot {
  margin-top: 7px;
}

.page-about .status-list__item h3 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .status-list__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.74;
  color: var(--mute);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  margin-top: 28px;
  padding: 22px clamp(16px, 2.6vw, 26px) 24px;
  border: 1px solid var(--line);
  border-top: 3px solid var(--red);
  background: linear-gradient(180deg, rgba(227, 238, 246, 0.7) 0%, rgba(255, 255, 255, 0.9) 100%);
}

.page-about .about-cta p {
  margin: 0 0 18px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .about-audience li {
    padding: 16px 20px 16px 0;
  }

  .page-about .about-audience li:nth-child(odd) {
    border-right: 1px solid var(--line-soft);
  }

  .page-about .about-audience li:nth-child(even) {
    padding-left: 20px;
  }
}

@media (min-width: 760px) {
  .page-about .team-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .about-split {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 30px;
    align-items: start;
  }

  .page-about .about-split .about-figure {
    margin-top: 0;
  }
}

@media (min-width: 900px) {
  .page-about .about-body {
    display: grid;
    grid-template-columns: var(--about-anchor-w) minmax(0, 1fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .about-anchor {
    position: sticky;
    top: calc(var(--topbar-h) + 28px);
    margin: 0;
    padding: 0 0 0 16px;
    border-bottom: 0;
    border-left: 1px solid var(--line);
    background: none;
    overflow: visible;
  }

  .page-about .about-anchor__title {
    display: block;
  }

  .page-about .about-anchor__list {
    display: block;
    white-space: normal;
  }

  .page-about .about-anchor__list li + li {
    margin-top: 2px;
  }

  .page-about .about-anchor__list a {
    display: flex;
    width: 100%;
    padding: 7px 8px;
    border: 0;
    background: none;
  }

  .page-about .about-anchor__list a:hover,
  .page-about .about-anchor__list a:focus-visible {
    background: var(--fir-tint);
  }

  .page-about .path-map {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0;
  }

  .page-about .path-map__step {
    border-right: 0;
  }

  .page-about .path-map__step:last-child {
    border-right: 1px solid var(--line);
  }

  .page-about .about-timeline {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
    padding-top: 36px;
  }

  .page-about .about-timeline::before {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: 17px;
    height: 1px;
    background: var(--line);
  }

  .page-about .about-timeline__item {
    padding-left: 0;
    padding-top: 20px;
  }

  .page-about .about-timeline__item::before {
    left: 0;
    top: 13px;
  }

  .page-about .about-timeline__item::after {
    display: none;
  }

  .page-about .about-timeline__item:nth-child(1) .about-timeline__paper {
    rotate: -0.5deg;
  }

  .page-about .about-timeline__item:nth-child(2) .about-timeline__paper {
    rotate: 0.35deg;
  }

  .page-about .about-timeline__item:nth-child(3) .about-timeline__paper {
    rotate: -0.25deg;
  }
}

@media (min-width: 1100px) {
  .page-about {
    --about-anchor-w: 196px;
  }

  .page-about .about-flow p,
  .page-about .sec-head__lead {
    font-size: 1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-anchor__list a,
  .page-about .about-timeline__paper {
    transition: none;
  }

  .page-about .about-timeline__paper:hover,
  .page-about .about-timeline__paper:focus-within {
    translate: none;
  }
}