.page-about {
  --about-line: rgba(244, 239, 228, 0.13);
  --about-gold-line: rgba(242, 193, 78, 0.3);
  --about-radius: 22px;
  padding-bottom: 88px;
  background:
    radial-gradient(1100px 560px at 86% -8%, rgba(74, 155, 255, 0.10), transparent 62%),
    radial-gradient(880px 500px at 4% 14%, rgba(242, 193, 78, 0.07), transparent 60%);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: 34px 0 0;
}

.page-about .breadcrumb {
  margin-bottom: 22px;
  font-size: 13px;
  color: var(--mist);
}

.page-about .breadcrumb a {
  color: var(--mist);
  text-decoration: none;
}

.page-about .breadcrumb a:hover {
  color: var(--blue);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  align-items: end;
}

.page-about .about-hero h1 {
  margin: 14px 0 20px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(32px, 7.6vw, 60px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--paper-100);
}

.page-about .about-hero__accent {
  color: var(--gold);
}

.page-about .about-hero .lede {
  max-width: 46ch;
  color: var(--mist);
  font-size: 16px;
  line-height: 1.8;
}

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

.page-about .about-hero__board {
  position: relative;
  padding: 20px 18px 14px;
  border: 1px solid var(--about-line);
  border-radius: var(--about-radius);
  background: linear-gradient(180deg, rgba(16, 32, 28, 0.9), rgba(11, 20, 18, 0.6));
  box-shadow: var(--shadow-soft);
}

.page-about .about-hero__board svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-hero__board-note {
  margin: 10px 0 0;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--mist);
  text-transform: uppercase;
}

/* ---------- 主布局：左侧常驻小节轴 ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  margin-top: 54px;
}

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

.page-about .anchor-nav {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 8px;
  scrollbar-width: none;
}

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

.page-about .anchor-nav__link {
  flex: 0 0 auto;
  padding: 8px 14px;
  border: 1px solid var(--about-line);
  border-radius: var(--pill);
  font-size: 13px;
  color: var(--mist);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

.page-about .anchor-nav__link:hover,
.page-about .anchor-nav__link:focus-visible {
  color: var(--paper-100);
  border-color: var(--about-gold-line);
}

.page-about .anchor-nav__link.is-active {
  color: var(--ink-900);
  background: var(--gold);
  border-color: var(--gold);
}

.page-about .about-aside__note {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 16px;
  padding: 14px 16px;
  border: 1px solid var(--about-line);
  border-radius: var(--radius-md);
  background: rgba(16, 32, 28, 0.62);
}

.page-about .about-aside__note p {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 章节排布 ---------- */
.page-about .about-main {
  display: flex;
  flex-direction: column;
  gap: 72px;
  min-width: 0;
}

.page-about .about-main .section {
  scroll-margin-top: calc(var(--header-h) + 18px);
}

.page-about .section__lede {
  max-width: 62ch;
}

.page-about .about-intro {
  max-width: 68ch;
  margin-top: 4px;
}

/* ---------- 01 规模数字 ---------- */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 30px;
}

.page-about .about-stats .stat {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
  padding: 20px 18px;
  border: 1px solid var(--about-line);
  border-radius: var(--radius-md);
  background: linear-gradient(180deg, rgba(23, 51, 44, 0.72), rgba(16, 32, 28, 0.9));
}

.page-about .about-stats .stat__value {
  font-family: var(--font-data);
  font-size: 34px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.01em;
}

.page-about .about-stats .stat--gold .stat__value { color: var(--gold); }
.page-about .about-stats .stat--blue .stat__value { color: var(--blue); }
.page-about .about-stats .stat--alert .stat__value { color: var(--alert); }
.page-about .about-stats .stat--turf .stat__value { color: var(--turf); }

.page-about .about-stats .stat__label {
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .about-main .note {
  margin-top: 18px;
  max-width: 70ch;
  font-size: 12.5px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 02 时间线 ---------- */
.page-about .timeline {
  position: relative;
  margin: 34px 0 0;
  padding: 0 0 0 30px;
  list-style: none;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--gold), rgba(242, 193, 78, 0.06));
}

.page-about .timeline__node {
  position: relative;
  margin-bottom: 16px;
}

.page-about .timeline__node::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 24px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--ink-900);
  border: 2px solid var(--gold);
  box-shadow: 0 0 0 5px rgba(242, 193, 78, 0.10);
}

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

.page-about .tl-card {
  border-radius: var(--radius-md);
  background: var(--paper-100);
  color: var(--paper-ink);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
}

.page-about .tl-card__summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
  padding: 18px 20px;
  cursor: pointer;
  list-style: none;
}

.page-about .tl-card__summary::-webkit-details-marker {
  display: none;
}

.page-about .tl-card__summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-data);
  font-size: 18px;
  line-height: 1;
  color: var(--paper-muted);
}

.page-about .tl-card[open] .tl-card__summary::after {
  content: "–";
}

.page-about .tl-card__summary:hover {
  background: var(--paper-300);
}

.page-about .tl-card__summary:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: -2px;
}

.page-about .tl-card__year {
  font-family: var(--font-data);
  font-size: 21px;
  font-weight: 700;
  color: var(--amber);
}

.page-about .tl-card__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  letter-spacing: -0.01em;
  color: var(--paper-ink);
}

.page-about .tl-card__body {
  padding: 0 20px 20px;
  border-top: 1px solid var(--line-paper);
  margin-top: 2px;
  padding-top: 14px;
}

.page-about .tl-card__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper-muted);
}

/* ---------- 03 团队 ---------- */
.page-about .team-bar {
  display: flex;
  height: 8px;
  margin: 30px 0 14px;
  border-radius: var(--pill);
  overflow: hidden;
  background: var(--ink-700);
}

.page-about .team-bar__seg {
  height: 100%;
}

.page-about .team-bar__seg--edit { width: 39%; background: var(--blue); }
.page-about .team-bar__seg--eng { width: 33%; background: var(--gold); }
.page-about .team-bar__seg--ops { width: 15%; background: var(--turf); }
.page-about .team-bar__seg--cs { width: 13%; background: var(--alert); }

.page-about .team-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin: 0 0 30px;
  padding: 0;
  list-style: none;
  font-size: 13px;
  color: var(--mist);
}

.page-about .team-legend li {
  display: flex;
  align-items: center;
  gap: 7px;
}

.page-about .team-legend__dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
}

.page-about .team-legend__dot--edit { background: var(--blue); }
.page-about .team-legend__dot--eng { background: var(--gold); }
.page-about .team-legend__dot--ops { background: var(--turf); }
.page-about .team-legend__dot--cs { background: var(--alert); }

.page-about .team-split {
  align-items: start;
}

.page-about .team-figure {
  margin: 0;
}

.page-about .pill-tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.page-about .team-panel {
  padding: 22px 20px;
  border: 1px solid var(--about-line);
  border-radius: var(--radius-md);
  background: linear-gradient(180deg, rgba(23, 51, 44, 0.8), rgba(16, 32, 28, 0.92));
}

.page-about .team-panel__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  letter-spacing: -0.01em;
  color: var(--gold);
}

.page-about .team-panel p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- 04 数据来源 ---------- */
.page-about .source-list {
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--about-line);
}

.page-about .source-list__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding: 20px 0;
  border-bottom: 1px solid var(--about-line);
}

.page-about .source-list__key {
  font-family: var(--font-data);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-about .source-list__text {
  margin: 0;
  max-width: 72ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .source-list__text a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(74, 155, 255, 0.4);
}

.page-about .source-list__text a:hover {
  border-bottom-color: var(--blue);
}

/* ---------- 05 资质 ---------- */
.page-about .honor-split {
  align-items: start;
  margin-top: 28px;
}

.page-about .honor-figure {
  margin: 0;
}

.page-about .honor-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .honor-list__item {
  position: relative;
  padding: 0 0 22px 18px;
  border-left: 2px solid var(--about-gold-line);
}

.page-about .honor-list__item + .honor-list__item {
  margin-top: 22px;
}

.page-about .honor-list__year {
  display: block;
  font-family: var(--font-data);
  font-size: 20px;
  font-weight: 700;
  color: var(--gold);
}

.page-about .honor-list__title {
  margin: 8px 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  letter-spacing: -0.01em;
  color: var(--paper-100);
}

.page-about .honor-list__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- 06 下一步 ---------- */
.page-about .next-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: 28px;
}

.page-about .next-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
  padding: 24px 20px;
  border-radius: var(--about-radius);
  border: 1px solid var(--about-line);
  background: linear-gradient(180deg, rgba(244, 239, 228, 0.06), rgba(16, 32, 28, 0.9));
}

.page-about .next-card__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
  letter-spacing: -0.01em;
  color: var(--paper-100);
}

.page-about .next-card p {
  margin: 0;
  flex: 1 1 auto;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .next-card .btn {
  margin-top: 4px;
}

/* ---------- 图片 ---------- */
.page-about .media-figure {
  margin: 26px 0 0;
  border-radius: var(--about-radius);
  overflow: hidden;
  background: linear-gradient(160deg, var(--ink-700), var(--ink-900));
}

.page-about .media-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .media-figure__caption {
  padding: 12px 18px 14px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--mist);
  background: rgba(11, 20, 18, 0.72);
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .source-list__item {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 20px;
    align-items: baseline;
  }

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

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 48px;
  }

  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (min-width: 1000px) {
  .page-about .about-layout {
    grid-template-columns: 216px minmax(0, 1fr);
    gap: 56px;
  }

  .page-about .about-aside {
    position: sticky;
    top: calc(var(--header-h) + 22px);
    align-self: start;
  }

  .page-about .anchor-nav {
    flex-direction: column;
    gap: 3px;
    padding-bottom: 0;
    overflow: visible;
  }

  .page-about .anchor-nav__link {
    border: none;
    border-left: 2px solid transparent;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    padding: 9px 12px;
    white-space: normal;
  }

  .page-about .anchor-nav__link.is-active {
    color: var(--gold);
    background: rgba(242, 193, 78, 0.10);
    border-left-color: var(--gold);
  }

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

  .page-about .about-aside__note p {
    margin-top: 10px;
  }
}

@media (min-width: 1200px) {
  .page-about .about-layout {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: 72px;
  }

  .page-about .about-main {
    gap: 88px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .anchor-nav__link,
  .page-about .tl-card__summary {
    transition: none;
  }
}