.page-about {
  background: var(--c-900);
  color: var(--c-ink);
  font-family: var(--shell-font);
}

.page-about .about-wrap {
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding-inline: var(--pad-x);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(20px, 3.6vw, 38px) clamp(48px, 8vw, 96px);
  background:
    radial-gradient(120% 100% at 6% -12%, rgba(43, 232, 196, .16), rgba(43, 232, 196, 0) 58%),
    radial-gradient(90% 80% at 100% 0%, rgba(75, 63, 134, .42), rgba(75, 63, 134, 0) 62%),
    var(--c-900);
  border-bottom: 1px solid var(--c-line);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--c-signal), rgba(43, 232, 196, 0) 72%);
  opacity: .75;
}

.page-about .about-hero__title {
  margin: clamp(14px, 2.4vw, 26px) 0 0;
  font-size: clamp(36px, 7.2vw, 94px);
  font-weight: 250;
  line-height: 1.04;
  letter-spacing: -.015em;
  color: var(--c-ink);
}

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

.page-about .about-hero__lead {
  margin: clamp(18px, 2.8vw, 30px) 0 0;
  max-width: 40em;
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.85;
  color: var(--c-ink);
  opacity: .86;
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(30px, 5vw, 52px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--c-line);
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  overflow: hidden;
}

.page-about .about-fact {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: clamp(16px, 2.4vw, 24px) clamp(14px, 2vw, 22px);
  background: rgba(12, 47, 40, .94);
}

.page-about .about-fact__num {
  font-size: clamp(30px, 4.4vw, 52px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -.02em;
  font-variant-numeric: tabular-nums;
  color: var(--c-signal);
}

.page-about .about-fact__key {
  font-size: 12.5px;
  letter-spacing: .08em;
  color: var(--c-muted);
}

/* ---------- 通用分区 ---------- */
.page-about .about-sec {
  padding-block: clamp(46px, 8vw, 104px);
  border-bottom: 1px solid rgba(32, 83, 74, .55);
}

.page-about .about-sec__title {
  margin: 10px 0 0;
  max-width: 24em;
  font-size: clamp(26px, 3.4vw, 46px);
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: -.01em;
  color: var(--c-ink);
}

.page-about .about-sec__lead {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  max-width: 40em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--c-ink);
  opacity: .84;
}

.page-about .about-figure {
  margin: clamp(24px, 4vw, 40px) 0 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--c-800);
  border: 1px solid var(--c-line);
}

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

.page-about .about-figure figcaption {
  padding: 12px 18px;
  font-size: 12.5px;
  letter-spacing: .05em;
  line-height: 1.6;
  color: var(--c-muted);
  background: var(--c-800);
  border-top: 1px solid rgba(32, 83, 74, .6);
}

.page-about .about-figure--archive {
  max-width: 760px;
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  position: relative;
  margin: clamp(30px, 5vw, 52px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 14px;
  bottom: 18px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--c-signal) 0%, var(--c-line) 46%, rgba(32, 83, 74, 0) 100%);
}

.page-about .tl-item {
  position: relative;
  padding-left: clamp(26px, 4vw, 44px);
  border-bottom: 1px dashed rgba(32, 83, 74, .6);
}

.page-about .tl-item:last-child {
  border-bottom: 0;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: clamp(20px, 2.6vw, 30px);
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--c-signal);
  box-shadow: 0 0 0 5px rgba(43, 232, 196, .14);
  transition: transform var(--t-mid) var(--ease), box-shadow var(--t-mid) var(--ease);
}

.page-about .tl-item:hover::before {
  transform: scale(1.35);
  box-shadow: 0 0 0 8px rgba(43, 232, 196, .18);
}

.page-about .tl-node {
  padding-block: clamp(16px, 2.6vw, 26px);
}

.page-about .tl-node__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .tl-node__head:focus-visible {
  outline: 2px solid var(--c-signal-2);
  outline-offset: 6px;
  border-radius: 6px;
}

.page-about .tl-node__year {
  flex: 0 0 auto;
  font-size: clamp(30px, 4.6vw, 58px);
  font-weight: 250;
  line-height: 1;
  letter-spacing: -.02em;
  font-variant-numeric: tabular-nums;
  color: var(--c-signal);
}

.page-about .tl-node__title {
  font-size: clamp(15px, 1.6vw, 19px);
  font-weight: 500;
  line-height: 1.45;
  color: var(--c-ink);
}

.page-about .tl-node__plus {
  position: relative;
  flex: 0 0 20px;
  align-self: center;
  width: 20px;
  height: 20px;
  margin-left: auto;
}

.page-about .tl-node__plus::before,
.page-about .tl-node__plus::after {
  content: "";
  position: absolute;
  background: var(--c-signal-2);
  border-radius: 2px;
}

.page-about .tl-node__plus::before {
  left: 0;
  right: 0;
  top: 9px;
  height: 2px;
}

.page-about .tl-node__plus::after {
  top: 0;
  bottom: 0;
  left: 9px;
  width: 2px;
  transition: transform var(--t-mid) var(--ease);
}

.page-about .tl-node[open] .tl-node__plus::after {
  transform: scaleY(0);
}

.page-about .tl-node__body {
  padding-top: 10px;
  max-width: 44em;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--c-muted);
}

.page-about .tl-node__body p {
  margin: 0;
}

/* ---------- 团队分工 ---------- */
.page-about .duty-list {
  display: grid;
  gap: 14px;
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .duty {
  padding: clamp(18px, 2.4vw, 24px);
  border-radius: var(--r-lg);
  background: var(--c-800);
  border: 1px solid var(--c-line);
  transition: background var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-about .duty:hover,
.page-about .duty:focus-within {
  background: var(--c-700);
  border-color: rgba(43, 232, 196, .42);
}

.page-about .duty__top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.page-about .duty__name {
  font-size: clamp(17px, 1.8vw, 21px);
  font-weight: 600;
  color: var(--c-ink);
}

.page-about .duty__count {
  display: inline-flex;
  align-items: baseline;
  gap: 3px;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--c-signal);
}

.page-about .duty__num {
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 600;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.page-about .duty__track {
  display: block;
  margin-top: 14px;
  height: 8px;
  border-radius: var(--r-pill);
  background: rgba(32, 83, 74, .7);
  overflow: hidden;
}

.page-about .duty__fill {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--c-signal), var(--c-signal-2));
}

.page-about .duty--edit .duty__fill {
  width: 75%;
}

.page-about .duty--check .duty__fill {
  width: 25%;
}

.page-about .duty__note {
  display: block;
  margin-top: 12px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-muted);
}

.page-about .shift-note {
  margin-top: clamp(20px, 3vw, 30px);
  padding: clamp(18px, 2.6vw, 26px);
  border-left: 3px solid var(--c-signal);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  background: linear-gradient(90deg, rgba(43, 232, 196, .1), rgba(43, 232, 196, 0) 84%);
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--c-ink);
}

.page-about .shift-note p {
  margin: 0 0 10px;
}

.page-about .shift-note p:last-child {
  margin-bottom: 0;
}

/* ---------- 核对流程 ---------- */
.page-about .flow {
  display: grid;
  gap: 12px;
  margin: clamp(28px, 4.4vw, 44px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .flow__step {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: clamp(18px, 2.4vw, 24px);
  border-radius: var(--r-lg);
  background: linear-gradient(160deg, var(--c-700), var(--c-800));
  border: 1px solid var(--c-line);
}

.page-about .flow__no {
  font-size: 13px;
  letter-spacing: .16em;
  font-variant-numeric: tabular-nums;
  color: var(--c-signal);
}

.page-about .flow__title {
  margin: 0;
  font-size: clamp(17px, 1.8vw, 20px);
  font-weight: 600;
  color: var(--c-ink);
}

.page-about .flow__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--c-muted);
}

.page-about .flow__arrow {
  display: none;
  color: var(--c-signal-2);
  opacity: .85;
}

/* ---------- 覆盖范围 ---------- */
.page-about .cover-big {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.4vw, 26px);
  margin-top: clamp(26px, 4vw, 40px);
  padding: clamp(20px, 3vw, 30px);
  border-radius: var(--r-lg);
  background:
    radial-gradient(90% 160% at 0% 0%, rgba(43, 232, 196, .2), rgba(43, 232, 196, 0) 64%),
    var(--c-800);
  border: 1px solid var(--c-line);
}

.page-about .cover-big__num {
  font-size: clamp(52px, 8vw, 96px);
  font-weight: 600;
  line-height: .9;
  letter-spacing: -.03em;
  font-variant-numeric: tabular-nums;
  color: var(--c-signal);
}

.page-about .cover-big__key {
  font-size: 14px;
  line-height: 1.7;
  letter-spacing: .03em;
  color: var(--c-muted);
}

.page-about .cover-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 14px;
}

.page-about .cover-card {
  padding: clamp(18px, 2.4vw, 24px);
  border-radius: var(--r-lg);
  background: var(--c-800);
  border: 1px solid var(--c-line);
}

.page-about .cover-card h3 {
  margin: 0 0 10px;
  font-size: 16px;
  font-weight: 600;
  color: var(--c-ink);
}

.page-about .cover-card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--c-muted);
}

.page-about .chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.page-about .chip {
  display: inline-flex;
  align-items: center;
  padding: 5px 12px;
  border-radius: var(--r-pill);
  font-size: 12px;
  letter-spacing: .08em;
  border: 1px solid var(--c-line);
  background: rgba(19, 66, 57, .6);
  color: var(--c-signal-2);
}

.page-about .chip--confirmed {
  color: var(--c-signal);
  border-color: rgba(43, 232, 196, .4);
  background: rgba(43, 232, 196, .09);
}

.page-about .chip--talks {
  color: #B9AFF1;
  border-color: rgba(75, 63, 134, .85);
  background: rgba(75, 63, 134, .24);
}

.page-about .chip--rumor {
  color: #E6A3B2;
  border-color: rgba(122, 43, 60, .85);
  background: rgba(122, 43, 60, .24);
}

.page-about .chip--out {
  color: var(--c-warn);
  border-color: rgba(255, 162, 58, .4);
  background: rgba(255, 162, 58, .1);
}

.page-about .chip--back {
  color: var(--c-signal-2);
  border-color: rgba(143, 244, 224, .4);
  background: rgba(143, 244, 224, .08);
}

/* ---------- 认可与同行 ---------- */
.page-about .honor-list {
  display: grid;
  gap: 0;
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--c-line);
}

.page-about .honor {
  display: grid;
  gap: 6px;
  padding: clamp(16px, 2.4vw, 22px) 0;
  border-bottom: 1px solid var(--c-line);
}

.page-about .honor__k {
  font-size: 12.5px;
  letter-spacing: .16em;
  font-variant-numeric: tabular-nums;
  color: var(--c-signal);
}

.page-about .honor__t {
  font-size: clamp(16px, 1.7vw, 19px);
  font-weight: 500;
  line-height: 1.45;
  color: var(--c-ink);
}

.page-about .honor__d {
  max-width: 46em;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--c-muted);
}

/* ---------- 收尾 ---------- */
.page-about .about-close {
  padding-block: clamp(52px, 9vw, 110px);
  background:
    radial-gradient(120% 130% at 100% 0%, rgba(43, 232, 196, .14), rgba(43, 232, 196, 0) 62%),
    var(--c-800);
}

.page-about .about-close__title {
  margin: 10px 0 0;
  max-width: 20em;
  font-size: clamp(24px, 3.2vw, 42px);
  font-weight: 300;
  line-height: 1.25;
  letter-spacing: -.01em;
  color: var(--c-ink);
}

.page-about .about-close__text {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  max-width: 40em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--c-ink);
  opacity: .88;
}

.page-about .about-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(24px, 3.4vw, 36px);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .cover-card p,
  .page-about .flow__text {
    font-size: 15px;
  }
}

@media (min-width: 760px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .honor {
    grid-template-columns: 6.5em minmax(0, 14em) minmax(0, 1fr);
    align-items: baseline;
    gap: 18px;
  }
}

@media (min-width: 900px) {
  .page-about .flow {
    grid-template-columns: 1fr 46px 1fr 46px 1fr 46px 1fr;
    gap: 0;
    align-items: start;
  }

  .page-about .flow__step {
    height: 100%;
  }

  .page-about .flow__arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: 34px;
  }
}

@media (min-width: 1100px) {
  .page-about .about-hero__title {
    max-width: 16em;
  }

  .page-about .about-figure--archive {
    margin-left: clamp(26px, 4vw, 44px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tl-item::before,
  .page-about .tl-node__plus::after,
  .page-about .duty {
    transition: none;
  }
}
<<<END>>>