.page-about {
  --about-tl-line: rgba(77, 232, 176, 0.5);
  background: var(--ink);
  color: var(--paper);
  overflow-x: hidden;
}

.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-top: 22px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-about .breadcrumb a {
  color: var(--muted);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--mint);
}

.page-about .breadcrumb__sep {
  color: var(--line);
}

/* ---------- 首屏分屏 ---------- */
.page-about .about-hero {
  padding: 26px 0 52px;
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
}

.page-about .about-hero__story .eyebrow {
  margin: 0 0 14px;
  color: var(--amber);
}

.page-about .about-hero .display {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(34px, 7.2vw, 60px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-hero .lede {
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--paper);
  max-width: 34em;
}

.page-about .about-hero__note {
  margin: 0 0 24px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
  max-width: 34em;
}

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

.page-about .about-hero__scale {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: 22px 18px 30px;
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  background: linear-gradient(150deg, var(--grad-a), var(--grad-b));
}

.page-about .about-hero__scale > img {
  position: absolute;
  inset: 0;
  z-index: -1;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.3;
  pointer-events: none;
}

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

.page-about .year-scale__item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(10, 20, 17, 0.6);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .year-scale__item:hover {
  background: var(--panel-2);
  border-color: var(--mint);
}

.page-about .year-scale__yr {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--mint);
  line-height: 1;
}

.page-about .year-scale__cap {
  font-size: 13px;
  line-height: 1.6;
  color: var(--paper);
}

.page-about .about-hero__stamp {
  position: absolute;
  right: 14px;
  bottom: 10px;
  color: var(--amber);
  font-family: var(--font-mono);
  letter-spacing: 0.14em;
}

/* ---------- 区块头 ---------- */
.page-about .about-head {
  max-width: 42em;
}

.page-about .about-head .eyebrow {
  margin: 0 0 10px;
  color: var(--mint);
}

.page-about .about-head .h2 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 4.6vw, 38px);
  line-height: 1.16;
  letter-spacing: -0.01em;
}

.page-about .about-head__sub {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  padding: 48px 0;
  border-top: 1px solid var(--line);
}

.page-about .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 22px 0 26px;
}

.page-about .filter-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: var(--panel);
  color: var(--paper);
  font-size: 13px;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .filter-btn:hover,
.page-about .filter-btn:focus-visible {
  border-color: var(--mint);
  background: var(--panel-2);
}

.page-about .filter-btn[aria-pressed="true"] {
  border-color: var(--mint);
  background: var(--panel-2);
  color: var(--mint);
  box-shadow: inset 0 0 0 1px rgba(77, 232, 176, 0.25);
}

.page-about .filter-count {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--minted, var(--mint));
  opacity: 0.85;
}

.page-about .tl {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 0;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 14px;
  bottom: 14px;
  width: 1px;
  background: linear-gradient(180deg, var(--grad-a) 0%, var(--about-tl-line) 45%, rgba(77, 232, 176, 0.12) 100%);
}

.page-about .tl__item {
  position: relative;
  padding: 16px 0 20px 30px;
  border-bottom: 1px solid var(--line);
}

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 24px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--mint);
  box-shadow: 0 0 0 4px rgba(77, 232, 176, 0.12), 0 0 14px rgba(77, 232, 176, 0.5);
}

.page-about .tl__item.is-filtered-out {
  display: none;
}

.page-about .tl__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.page-about .tl__year {
  font-family: var(--font-mono);
  font-size: 20px;
  letter-spacing: 0.08em;
  color: var(--mint);
  font-variant-numeric: tabular-nums;
}

.page-about .tl__item .h3 {
  margin: 0 0 8px;
  font-size: 20px;
  line-height: 1.35;
  font-weight: 700;
  color: var(--paper);
}

.page-about .tl__item p {
  margin: 0 0 6px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
  max-width: 42em;
}

.page-about .tl__result {
  color: var(--paper) !important;
  font-size: 14px !important;
  border-left: 2px solid var(--amber);
  padding-left: 12px;
  margin-top: 10px !important;
}

/* ---------- 档案规模 ---------- */
.page-about .about-archive {
  position: relative;
  overflow: hidden;
  padding: 48px 0;
  border-top: 1px solid var(--line);
  background: var(--panel);
}

.page-about .about-archive__tex {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.16;
  pointer-events: none;
}

.page-about .about-archive > .container {
  position: relative;
  z-index: 1;
}

.page-about .stat-grid {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 26px 0 0;
  padding: 0;
}

.page-about .stat {
  display: grid;
  gap: 6px;
  align-content: start;
  padding: 18px 16px;
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  background: rgba(10, 20, 17, 0.72);
}

.page-about .stat__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(26px, 5vw, 38px);
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--mint-bright);
  text-shadow: 0 0 20px rgba(77, 232, 176, 0.35);
}

.page-about .stat__key {
  font-size: 14px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .stat__note {
  font-size: 12px;
  line-height: 1.65;
  color: var(--muted);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding: 48px 0;
  border-top: 1px solid var(--line);
}

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
}

.page-about .about-team__lead {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
  max-width: 38em;
}

.page-about .role-list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .role {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--panel);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .role:hover {
  transform: translateY(-3px);
  border-color: var(--mint);
}

.page-about .role__num {
  flex: 0 0 auto;
  min-width: 34px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 24px;
  line-height: 1.1;
  color: var(--mint);
}

.page-about .role__text {
  display: grid;
  gap: 4px;
}

.page-about .role__name {
  font-size: 15px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .role__desc {
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .about-team__side {
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-about .about-team__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: var(--r-img);
  border: 1px solid var(--line);
}

.page-about .about-team__cap {
  margin: 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 协作与质量 ---------- */
.page-about .about-coop {
  padding: 48px 0;
  border-top: 1px solid var(--line);
}

.page-about .coop-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-top: 26px;
}

.page-about .coop-card {
  padding: 20px 18px;
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  background: var(--panel);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .coop-card:hover {
  border-color: var(--mint);
  background: var(--panel-2);
}

.page-about .coop-card .card__head {
  margin-bottom: 12px;
}

.page-about .coop-card .card__title {
  margin: 0 0 10px;
  font-size: 17px;
  line-height: 1.4;
  font-weight: 700;
  color: var(--paper);
}

.page-about .coop-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .coop-card a {
  color: var(--mint);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .coop-card a:hover,
.page-about .coop-card a:focus-visible {
  color: var(--mint-bright);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  padding: 40px 0 64px;
  border-top: 1px solid var(--line);
}

.page-about .about-cta__inner {
  display: grid;
  gap: 20px;
  padding: 26px 22px;
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  background: linear-gradient(140deg, var(--grad-a), var(--grad-b));
}

.page-about .about-cta .h2 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 4.4vw, 34px);
  line-height: 1.18;
}

.page-about .about-cta__sub {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .stat-grid {
    gap: 14px;
  }

  .page-about .coop-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    padding: 32px 28px;
  }

  .page-about .about-cta__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 34px 0 64px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: 42fr 58fr;
    align-items: start;
    gap: 44px;
  }

  .page-about .about-hero__scale {
    padding: 26px 24px 34px;
  }

  .page-about .about-timeline,
  .page-about .about-archive,
  .page-about .about-team,
  .page-about .about-coop {
    padding: 64px 0;
  }

  .page-about .tl {
    padding-left: 8px;
  }

  .page-about .tl__item {
    display: grid;
    grid-template-columns: 96px minmax(0, 1fr);
    grid-template-areas:
      "year row"
      "year title"
      "year body";
    column-gap: 20px;
    align-items: start;
    padding: 22px 0 24px 30px;
  }

  .page-about .tl__row {
    grid-area: row;
    margin-bottom: 6px;
  }

  .page-about .tl__year {
    grid-area: year;
    font-size: 22px;
    padding-top: 2px;
  }

  .page-about .tl__item .h3 {
    grid-area: title;
  }

  .page-about .tl__item p {
    grid-area: body;
  }

  .page-about .tl__item::before {
    top: 30px;
  }

  .page-about .stat-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
    margin-top: 30px;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 40px;
    align-items: start;
  }
}

@media (min-width: 1180px) {
  .page-about .coop-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1fr) 340px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .role:hover {
    transform: none;
  }
}
<<<END>>>

.page-about {
  --minted: currentColor;
}