.page-about {
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  overflow-x: clip;
  --about-line: rgba(201, 207, 216, 0.26);
  --about-ink-soft: rgba(244, 241, 234, 0.74);
}

.page-about h1,
.page-about h2,
.page-about h3 {
  margin: 0;
  font-weight: 900;
  letter-spacing: -0.01em;
  line-height: 1.18;
}

.page-about h2 {
  font-size: clamp(24px, 4.2vw, 40px);
  max-width: 22ch;
  margin-bottom: 16px;
}

.page-about h3 {
  font-size: clamp(18px, 2.4vw, 24px);
}

.page-about p {
  margin: 0 0 16px;
}

.page-about a {
  color: inherit;
}

/* ---------- 面包屑与页头 ---------- */

.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 22px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
  color: var(--stone-soft);
}

.page-about .breadcrumb a {
  color: var(--stone-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--speed) ease, border-color var(--speed) ease;
}

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

.page-about .about-hero {
  position: relative;
  padding: clamp(36px, 6vw, 84px) 0 clamp(32px, 5vw, 64px);
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -20% -10% auto auto;
  width: min(520px, 80vw);
  height: min(520px, 80vw);
  background: radial-gradient(circle, var(--glow) 0%, transparent 68%);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(28px, 5vw, 52px);
  align-items: center;
}

.page-about .about-kicker {
  margin: 0 0 14px;
  font-size: var(--fs-12);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
}

.page-about h1 {
  font-size: clamp(28px, 5.6vw, 52px);
  max-width: 20ch;
  margin-bottom: 20px;
}

.page-about .about-lede {
  max-width: 48ch;
  font-size: var(--fs-16);
  line-height: 1.9;
  color: var(--about-ink-soft);
}

.page-about .about-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 26px;
}

.page-about .about-jump a {
  display: inline-block;
  padding: 6px 12px;
  border: 1px solid var(--about-line);
  font-size: var(--fs-12);
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
  color: var(--stone-soft);
  text-decoration: none;
  transition: color var(--speed) ease, border-color var(--speed) ease, background var(--speed) ease;
}

.page-about .about-jump a:hover,
.page-about .about-jump a:focus-visible {
  color: var(--ink);
  background: var(--accent);
  border-color: var(--accent);
}

.page-about .about-hero__media {
  position: relative;
  aspect-ratio: 3 / 2;
  overflow: hidden;
  border: 1px solid var(--about-line);
  border-left: 3px solid var(--clay);
  background: var(--ink-2);
}

.page-about .about-hero__media img,
.page-about .about-timeline__media img,
.page-about .about-team__media img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

/* ---------- 通用小节 ---------- */

.page-about .about-section-lede {
  max-width: 60ch;
  font-size: var(--fs-16);
  line-height: 1.85;
  color: var(--about-ink-soft);
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-about .panel-label {
  display: inline-block;
  margin: 0 0 16px;
  padding: 4px 10px;
  background: var(--accent);
  color: var(--ink);
  font-size: var(--fs-12);
  letter-spacing: 0.12em;
}

.page-about .prose p {
  font-size: var(--fs-16);
  line-height: 1.85;
  color: var(--about-ink-soft);
  max-width: 72ch;
}

.page-about .grid-asym {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
}

/* ---------- 我们做的事 ---------- */

.page-about .aside-note {
  border-left: 3px solid var(--clay);
  padding: 4px 0 4px 16px;
  margin-bottom: 24px;
}

.page-about .aside-note p {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.85;
  color: var(--stone-soft);
}

.page-about .aside-note strong {
  color: var(--paper);
}

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

.page-about .about-quicklinks a {
  display: block;
  padding: 12px 14px;
  border: 1px solid var(--about-line);
  border-left: 3px solid var(--clay);
  font-size: var(--fs-14);
  line-height: 1.6;
  color: var(--paper);
  text-decoration: none;
  transition: border-color var(--speed) ease, background var(--speed) ease;
}

.page-about .about-quicklinks a:hover,
.page-about .about-quicklinks a:focus-visible {
  border-left-color: var(--accent);
  background: var(--ink-2);
}

.page-about .about-more {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px;
  border-top: 2px solid var(--accent);
  background: var(--ink-2);
  font-size: var(--fs-14);
  color: var(--paper);
  text-decoration: none;
}

.page-about .about-more .mono {
  font-size: var(--fs-12);
  letter-spacing: 0.16em;
  color: var(--accent);
}

/* ---------- 演进 ---------- */

.page-about .about-timeline__grid {
  display: grid;
  gap: clamp(20px, 3vw, 36px);
}

.page-about .about-rail {
  align-self: start;
}

.page-about .about-rail__list {
  display: flex;
  gap: 8px;
  margin: 0 0 12px;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-rail__list a {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--about-line);
  text-decoration: none;
  white-space: nowrap;
  transition: border-color var(--speed) ease, background var(--speed) ease;
}

.page-about .about-rail__list a:hover,
.page-about .about-rail__list a:focus-visible {
  border-color: var(--accent);
  background: rgba(255, 106, 43, 0.1);
}

.page-about .about-rail__year {
  font-size: var(--fs-12);
  color: var(--accent);
  letter-spacing: 0.08em;
}

.page-about .about-rail__name {
  font-size: var(--fs-14);
  color: var(--paper);
}

.page-about .about-rail__top {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--stone-soft);
  text-decoration: none;
  border-bottom: 1px dashed var(--about-line);
  padding-bottom: 2px;
}

.page-about .about-rail__top:hover,
.page-about .about-rail__top:focus-visible {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.page-about .about-stages {
  display: grid;
  gap: clamp(18px, 3vw, 26px);
}

.page-about .about-stage {
  position: relative;
  padding: clamp(20px, 3vw, 34px);
  background: var(--ink-2);
  border: 1px solid var(--about-line);
  border-left: 3px solid var(--clay);
  scroll-margin-top: 96px;
}

.page-about .about-stage::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 20px;
  height: 20px;
  background: var(--accent);
  clip-path: polygon(100% 0, 100% 100%, 0 100%);
}

.page-about .about-stage--paper {
  background: var(--paper);
  color: var(--paper-ink);
  border-color: rgba(22, 33, 58, 0.14);
  border-left-color: var(--accent);
}

.page-about .about-stage__head {
  margin-bottom: 12px;
}

.page-about .about-stage__tag {
  display: block;
  margin-bottom: 8px;
  font-size: var(--fs-12);
  letter-spacing: 0.12em;
  color: var(--clay);
}

.page-about .about-stage--paper .about-stage__tag {
  color: var(--clay);
}

.page-about .about-stage p {
  font-size: var(--fs-16);
  line-height: 1.85;
  color: var(--about-ink-soft);
  margin-bottom: 14px;
}

.page-about .about-stage--paper p {
  color: rgba(22, 33, 58, 0.78);
}

.page-about .about-stage .about-stage__result {
  margin-bottom: 0;
  padding-top: 12px;
  border-top: 1px solid var(--about-line);
  font-size: var(--fs-14);
  color: var(--stone-soft);
}

.page-about .about-stage--paper .about-stage__result {
  border-top-color: rgba(22, 33, 58, 0.16);
  color: rgba(22, 33, 58, 0.66);
}

.page-about .about-timeline__media {
  position: relative;
  margin: clamp(28px, 5vw, 48px) 0 0;
  aspect-ratio: 21 / 9;
  overflow: hidden;
  border: 1px solid var(--about-line);
  border-left: 3px solid var(--clay);
  background: var(--ink-2);
}

/* ---------- 团队 ---------- */

.page-about .about-team__grid {
  display: grid;
  gap: clamp(16px, 3vw, 24px);
  margin-bottom: clamp(28px, 4vw, 44px);
}

.page-about .about-team__card {
  position: relative;
  padding: clamp(20px, 3vw, 28px);
  background: var(--ink-2);
  border: 1px solid var(--about-line);
  border-top: 3px solid var(--clay);
}

.page-about .about-team__no {
  display: inline-block;
  margin-bottom: 10px;
  font-size: var(--fs-12);
  letter-spacing: 0.2em;
  color: var(--accent);
}

.page-about .about-team__card h3 {
  margin-bottom: 10px;
}

.page-about .about-team__card p {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.85;
  color: var(--about-ink-soft);
}

.page-about .about-team__media {
  position: relative;
  margin: 0 0 clamp(28px, 4vw, 44px);
  aspect-ratio: 9 / 7;
  overflow: hidden;
  border: 1px solid var(--about-line);
  border-left: 3px solid var(--clay);
  background: var(--ink-2);
}

.page-about .about-flow h3 {
  margin-bottom: 18px;
  font-size: clamp(18px, 2.4vw, 26px);
}

.page-about .about-flow__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
  counter-reset: flow;
}

.page-about .about-flow__list li {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 14px 16px;
  border: 1px solid var(--about-line);
  background: rgba(27, 59, 111, 0.4);
}

.page-about .about-flow__step {
  font-size: var(--fs-14);
  color: var(--accent);
  letter-spacing: 0.1em;
}

.page-about .about-flow__list p {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--about-ink-soft);
}

.page-about .about-flow__list strong {
  color: var(--paper);
}

/* ---------- 检查 ---------- */

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

.page-about .about-check li {
  position: relative;
  padding: 14px 16px 14px 38px;
  background: var(--ink-2);
  border: 1px solid var(--about-line);
  font-size: var(--fs-14);
  line-height: 1.85;
  color: var(--about-ink-soft);
}

.page-about .about-check li::before {
  content: "";
  position: absolute;
  left: 16px;
  top: 20px;
  width: 9px;
  height: 9px;
  background: var(--moss);
}

.page-about .about-check strong {
  color: var(--paper);
}

.page-about .about-monthly {
  padding: clamp(20px, 3vw, 26px);
  background: var(--ink-2);
  border: 1px solid var(--about-line);
  border-left: 3px solid var(--accent);
}

.page-about .about-monthly__label {
  margin: 0 0 12px;
  font-size: var(--fs-12);
  letter-spacing: 0.14em;
  color: var(--accent);
}

.page-about .about-monthly p {
  font-size: var(--fs-14);
  line-height: 1.85;
  color: var(--about-ink-soft);
}

.page-about .about-monthly__meta {
  margin: 0;
  padding-top: 12px;
  border-top: 1px solid var(--about-line);
  font-size: var(--fs-12);
  color: var(--stone-soft);
}

/* ---------- 数据 ---------- */

.page-about .about-data {
  background: var(--paper);
  color: var(--paper-ink);
}

.page-about .about-data h2,
.page-about .about-data h3 {
  color: var(--paper-ink);
}

.page-about .about-data .panel-label {
  background: var(--paper-ink);
  color: var(--paper);
}

.page-about .about-data__lede {
  max-width: 58ch;
  font-size: var(--fs-16);
  line-height: 1.85;
  color: rgba(22, 33, 58, 0.74);
  margin-bottom: clamp(24px, 4vw, 36px);
}

.page-about .about-stats {
  list-style: none;
  margin: 0 0 clamp(28px, 4vw, 44px);
  padding: 0;
  display: grid;
  gap: 1px;
  background: rgba(22, 33, 58, 0.16);
  border: 1px solid rgba(22, 33, 58, 0.16);
}

.page-about .about-stat {
  display: grid;
  gap: 4px;
  padding: 18px 16px;
  background: var(--paper);
}

.page-about .about-stat__num {
  font-size: clamp(26px, 4vw, 38px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--accent);
}

.page-about .about-stat__label {
  font-size: var(--fs-14);
  font-weight: 700;
  color: var(--paper-ink);
}

.page-about .about-stat__note {
  font-size: var(--fs-12);
  color: var(--stone);
}

.page-about .about-data__split {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
}

.page-about .about-data__block h3 {
  margin-bottom: 12px;
  font-size: clamp(18px, 2.2vw, 22px);
}

.page-about .about-data__block p {
  font-size: var(--fs-14);
  line-height: 1.85;
  color: rgba(22, 33, 58, 0.76);
}

.page-about .about-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--fs-14);
  background: var(--white);
}

.page-about .about-table th,
.page-about .about-table td {
  padding: 11px 14px;
  text-align: left;
  border-bottom: 1px solid rgba(22, 33, 58, 0.12);
}

.page-about .about-table th {
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--stone);
  background: rgba(22, 33, 58, 0.05);
}

.page-about .about-table td:last-child {
  text-align: right;
  color: var(--paper-ink);
}

/* ---------- 参与 ---------- */

.page-about .about-join__grid {
  display: grid;
  gap: clamp(16px, 3vw, 24px);
  margin-bottom: clamp(24px, 4vw, 36px);
}

.page-about .about-join__card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
  padding: clamp(20px, 3vw, 28px);
  background: var(--ink-2);
  border: 1px solid var(--about-line);
  border-bottom: 3px solid var(--clay);
}

.page-about .about-join__card h3 {
  font-size: var(--fs-18);
}

.page-about .about-join__card p {
  margin: 0;
  flex: 1;
  font-size: var(--fs-14);
  line-height: 1.85;
  color: var(--about-ink-soft);
}

.page-about .btn {
  display: inline-block;
  padding: 9px 16px;
  font-size: var(--fs-14);
  text-decoration: none;
  border: 1px solid transparent;
  transition: background var(--speed) ease, color var(--speed) ease, border-color var(--speed) ease;
}

.page-about .btn--ghost {
  border-color: var(--about-line);
  color: var(--paper);
}

.page-about .btn--ghost:hover,
.page-about .btn--ghost:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
}

.page-about .btn--primary {
  background: var(--accent);
  color: var(--ink);
  font-weight: 700;
}

.page-about .btn--primary:hover,
.page-about .btn--primary:focus-visible {
  background: var(--accent-soft);
}

.page-about .about-join__foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  padding-top: clamp(20px, 3vw, 28px);
  border-top: 1px solid var(--about-line);
}

.page-about .about-join__foot p {
  margin: 0;
  flex: 1 1 260px;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--about-ink-soft);
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-about .about-team__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
  }

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

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

  .page-about .about-data__split {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }
}

@media (min-width: 960px) {
  .page-about .grid-asym {
    grid-template-columns: minmax(0, 7fr) minmax(0, 3fr) minmax(0, 2fr);
    gap: clamp(24px, 3vw, 44px);
    align-items: start;
  }

  .page-about .about-timeline__grid {
    grid-template-columns: 170px minmax(0, 1fr);
    gap: clamp(28px, 4vw, 52px);
  }

  .page-about .about-rail {
    position: sticky;
    top: 88px;
  }

  .page-about .about-rail__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    margin-bottom: 18px;
  }

  .page-about .about-rail__list a {
    border: none;
    border-left: 2px solid var(--about-line);
    padding: 10px 0 10px 14px;
  }

  .page-about .about-rail__list a:hover,
  .page-about .about-rail__list a:focus-visible {
    background: transparent;
    border-left-color: var(--accent);
  }
}

@media (min-width: 1100px) {
  .page-about .about-data__split {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: clamp(32px, 5vw, 64px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}
<<<END>>>