.page-about {
  --about-glow: rgba(110, 11, 27, .62);
  display: block;
  overflow-x: clip;
}

.page-about img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(1.5rem, 4vw, 2.6rem) 0 clamp(2rem, 5vw, 3.4rem);
  isolation: isolate;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: -46%;
  left: -22%;
  width: 118%;
  height: 165%;
  background:
    radial-gradient(52% 46% at 20% 30%, var(--about-glow), transparent 70%),
    radial-gradient(40% 38% at 88% 12%, rgba(34, 224, 200, .10), transparent 74%);
  pointer-events: none;
}

.page-about .about-hero__title {
  margin: .85rem 0 1.15rem;
  max-width: 15em;
  font-size: clamp(2.05rem, 7.4vw, 4.5rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -.015em;
}

.page-about .about-hero__lede {
  max-width: 34em;
  margin: 0;
  color: var(--mist);
  font-size: clamp(.95rem, 1.6vw, 1.08rem);
  line-height: 1.75;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.15rem 1.5rem;
  margin: 2.2rem 0 0;
  padding: 1.45rem 0 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.page-about .about-hero__stat {
  display: flex;
  flex-direction: column;
  gap: .3rem;
  min-width: 0;
}

.page-about .about-num {
  font-family: var(--mono);
  font-size: clamp(1.4rem, 3.4vw, 2rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--gold-hi);
}

.page-about .about-num em {
  margin-left: .14em;
  font-style: normal;
  font-size: .56em;
  color: var(--gold);
}

.page-about .about-cap {
  font-size: .82rem;
  letter-spacing: .05em;
  color: var(--mist);
}

/* ---------- 01 起点 ---------- */
.page-about .about-origin__grid {
  display: grid;
  gap: 2.2rem;
  margin-top: 1.6rem;
}

.page-about .about-origin__panel {
  position: relative;
  padding: 1.45rem 1.5rem 1.6rem;
  background: linear-gradient(180deg, rgba(22, 18, 26, .97), rgba(11, 11, 13, .97));
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.page-about .about-origin__panel::after {
  content: "";
  position: absolute;
  inset: 6px;
  border: 1px solid var(--line-soft);
  pointer-events: none;
}

.page-about .about-origin__kicker {
  margin: 0;
  font-family: var(--mono);
  font-size: .74rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-origin__facts {
  display: grid;
  gap: .85rem;
  margin: 1.05rem 0 0;
}

.page-about .about-origin__facts > div {
  display: grid;
  gap: .2rem;
  padding-bottom: .85rem;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-origin__facts > div:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .about-origin__facts dt {
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .12em;
  color: var(--gold);
}

.page-about .about-origin__facts dd {
  margin: 0;
  font-size: .92rem;
  line-height: 1.6;
  color: var(--ivory);
}

/* ---------- 02 时间轴 ---------- */
.page-about .about-timeline__figure {
  margin: 1.6rem 0 2.8rem;
  border: 1px solid var(--line);
  overflow: hidden;
}

.page-about .about-timeline__figure img {
  width: 100%;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

.page-about .about-timeline__list {
  position: relative;
  margin: 0;
  padding: 0 0 0 2.4rem;
  list-style: none;
}

.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  left: .5rem;
  top: .7rem;
  bottom: .7rem;
  width: 1px;
  background: linear-gradient(180deg, transparent, var(--gold) 6%, var(--gold) 94%, transparent);
  opacity: .5;
}

.page-about .about-timeline__item {
  position: relative;
  margin-bottom: 2.2rem;
}

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

.page-about .about-timeline__item::after {
  content: "";
  position: absolute;
  left: -1.9rem;
  top: .55rem;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(34, 224, 200, .13);
  transform: translateX(-50%);
}

.page-about .about-timeline__year {
  display: block;
  margin-bottom: .4rem;
  font-family: var(--mono);
  font-size: clamp(1.35rem, 4.8vw, 1.95rem);
  font-weight: 700;
  letter-spacing: -.02em;
  color: var(--gold-hi);
}

.page-about .about-timeline__card p:last-child {
  margin: 0;
  font-size: .92rem;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .about-timeline__more {
  margin: 2.4rem 0 0;
  font-size: .92rem;
  color: var(--mist);
}

.page-about .about-timeline__more a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 224, 200, .45);
}

.page-about .about-timeline__more a:hover {
  color: var(--gold-hi);
  border-bottom-color: var(--gold-hi);
}

/* ---------- 03 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: 2rem;
  margin-top: 1.6rem;
}

.page-about .about-team__figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--ink-2);
  overflow: hidden;
}

.page-about .about-team__figure img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-team__figure figcaption {
  padding: .7rem .9rem;
  font-size: .78rem;
  letter-spacing: .04em;
  color: var(--mist);
  border-top: 1px solid var(--line-soft);
}

.page-about .about-team__ratio {
  display: flex;
  height: 12px;
  border: 1px solid var(--line);
  background: var(--ink);
  overflow: hidden;
}

.page-about .about-team__seg {
  display: block;
  height: 100%;
}

.page-about .about-team__seg--edit { flex: 18 1 0; background: var(--red-2); }
.page-about .about-team__seg--dev  { flex: 21 1 0; background: var(--gold); }
.page-about .about-team__seg--cs   { flex: 15 1 0; background: var(--cyan); }
.page-about .about-team__seg--ds   { flex: 8 1 0;  background: var(--orange); }

.page-about .about-team__list {
  display: grid;
  gap: .1rem;
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-team__list li {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: .3rem .9rem;
  align-items: baseline;
  padding: .8rem 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-team__name {
  font-weight: 700;
  font-size: .98rem;
  color: var(--ivory);
}

.page-about .about-team__count {
  font-family: var(--mono);
  font-size: .84rem;
  letter-spacing: .04em;
  color: var(--gold-hi);
}

.page-about .about-team__list li p {
  grid-column: 1 / -1;
  margin: 0;
  font-size: .9rem;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .about-team__flow {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 2.6rem 0 0;
  padding: 1px;
  list-style: none;
  counter-reset: aboutflow;
  background: var(--line-soft);
  border: 1px solid var(--line);
}

.page-about .about-team__flow li {
  counter-increment: aboutflow;
  padding: 1.05rem 1.1rem 1.15rem;
  background: var(--ink);
  font-size: .89rem;
  line-height: 1.65;
  color: var(--mist);
}

.page-about .about-team__flow li::before {
  content: "0" counter(aboutflow);
  display: block;
  margin-bottom: .5rem;
  font-family: var(--mono);
  font-size: .76rem;
  letter-spacing: .16em;
  color: var(--cyan);
}

/* ---------- 04 协作中心 ---------- */
.page-about .about-hub__grid {
  display: grid;
  gap: 2rem;
}

.page-about .about-hub__figure {
  margin: 0;
  align-self: start;
}

.page-about .about-hub__figure img {
  width: 100%;
  aspect-ratio: 12 / 7;
  object-fit: cover;
}

/* ---------- 05 三件事 ---------- */
.page-about .about-pledge__list {
  display: grid;
  gap: 1.4rem;
  margin: 1.6rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-pledge__item {
  position: relative;
  padding: 1.35rem 1.3rem 1.45rem;
  background: linear-gradient(180deg, rgba(22, 18, 26, .9), rgba(11, 11, 13, .9));
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.page-about .about-pledge__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 100%;
  background: linear-gradient(180deg, var(--gold), transparent 82%);
}

.page-about .about-pledge__no {
  display: block;
  margin-bottom: .6rem;
  font-family: var(--mono);
  font-size: .82rem;
  letter-spacing: .2em;
  color: var(--gold);
}

.page-about .about-pledge__name {
  margin: 0 0 .55rem;
  font-size: 1.1rem;
  font-weight: 800;
  line-height: 1.35;
  color: var(--ivory);
}

.page-about .about-pledge__item p {
  margin: 0 0 1rem;
  font-size: .91rem;
  line-height: 1.72;
  color: var(--mist);
}

.page-about .about-pledge__link {
  display: inline-block;
  font-size: .84rem;
  letter-spacing: .03em;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 224, 200, .42);
}

.page-about .about-pledge__link:hover {
  color: var(--gold-hi);
  border-bottom-color: var(--gold-hi);
}

/* ---------- 06 季报 ---------- */
.page-about .about-report__grid {
  display: grid;
  gap: 2.2rem;
  align-items: start;
}

.page-about .about-report__text .btn {
  margin-top: 1.4rem;
}

.page-about .about-report__cover {
  position: relative;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: .55rem;
  padding: 2.4rem 1.5rem 1.6rem;
  background: linear-gradient(155deg, var(--red) 0%, var(--red-2) 52%, var(--ink-2) 100%);
  border: 1px solid var(--line-strong);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.page-about .about-report__cover::before {
  content: "";
  position: absolute;
  inset: 8px;
  border: 1px solid rgba(240, 212, 138, .3);
  pointer-events: none;
}

.page-about .about-report__edition {
  font-family: var(--mono);
  font-size: .76rem;
  letter-spacing: .22em;
  color: var(--gold-hi);
}

.page-about .about-report__title {
  font-size: clamp(1.35rem, 4.4vw, 1.9rem);
  font-weight: 900;
  line-height: 1.2;
  color: var(--ivory);
}

.page-about .about-report__year {
  margin-top: .3rem;
  font-family: var(--mono);
  font-size: .84rem;
  letter-spacing: .1em;
  color: var(--mist);
}

.page-about .about-report__spine {
  position: absolute;
  right: 0;
  bottom: 0;
  width: 58%;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--cyan));
}

/* ---------- 快捷入口条 ---------- */
.page-about .about-quick {
  padding: clamp(2rem, 5vw, 3.2rem) 0 clamp(2.4rem, 6vw, 3.6rem);
  background:
    radial-gradient(70% 120% at 8% 0%, rgba(110, 11, 27, .5), transparent 68%),
    var(--ink-2);
  border-top: 1px solid var(--line);
}

.page-about .about-quick__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.2rem 2rem;
}

.page-about .about-quick__lead {
  margin: 0;
  max-width: 22em;
  font-size: clamp(1.02rem, 2.2vw, 1.28rem);
  font-weight: 700;
  line-height: 1.5;
  color: var(--ivory);
}

.page-about .about-quick__acts {
  display: flex;
  flex-wrap: wrap;
  gap: .8rem;
}

/* ---------- 桌面端 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .about-pledge__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0;
    border: 1px solid var(--line);
  }

  .page-about .about-pledge__item {
    border: 0;
    border-left: 1px solid var(--line-soft);
    box-shadow: none;
  }

  .page-about .about-pledge__item:first-child {
    border-left: 0;
  }
}

@media (min-width: 940px) {
  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(280px, 1fr);
    gap: 3.6rem;
    align-items: start;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.08fr);
    gap: 3.2rem;
    align-items: center;
  }

  .page-about .about-hub__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    gap: 3.2rem;
    align-items: center;
  }

  .page-about .about-report__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(280px, 1fr);
    gap: 3.4rem;
    align-items: center;
  }

  /* 时间轴：中央细线 + 左右交错 */
  .page-about .about-timeline__list {
    padding-left: 0;
  }

  .page-about .about-timeline__list::before {
    left: 50%;
  }

  .page-about .about-timeline__item {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    column-gap: 4rem;
    align-items: start;
    margin-bottom: 2.6rem;
  }

  .page-about .about-timeline__item::after {
    left: 50%;
    top: .75rem;
  }

  .page-about .about-timeline__year {
    grid-row: 1;
    margin-bottom: 0;
    line-height: 1.05;
  }

  .page-about .about-timeline__card {
    grid-row: 1;
  }

  .page-about .about-timeline__item:nth-child(odd) .about-timeline__year {
    grid-column: 1;
    text-align: right;
  }

  .page-about .about-timeline__item:nth-child(odd) .about-timeline__card {
    grid-column: 2;
  }

  .page-about .about-timeline__item:nth-child(even) .about-timeline__year {
    grid-column: 2;
  }

  .page-about .about-timeline__item:nth-child(even) .about-timeline__card {
    grid-column: 1;
  }

  .page-about .about-timeline__more {
    margin-top: 2.8rem;
  }
}

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