.page-about {
  --pa-hair-dark: rgba(7, 28, 23, .14);
  --pa-hair-light: rgba(243, 247, 238, .13);
  --pa-ink-soft: #4E5C55;
  background: var(--ink-900);
  color: var(--mist);
  overflow-x: clip;
}

/* ---------- 基础区块 ---------- */
.page-about .pa-sec {
  position: relative;
  padding: clamp(52px, 8vw, 116px) 0;
}
.page-about .pa-sec--dark { background: var(--ink-900); color: var(--mist); }
.page-about .pa-sec--charcoal { background: var(--ink-800); color: var(--mist); }
.page-about .pa-sec--light { background: var(--mist); color: var(--ink-900); }

.page-about h2 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(28px, 5.2vw, 54px);
  line-height: 1.02;
  letter-spacing: -.03em;
  margin: 0 0 16px;
  max-width: 22ch;
}
.page-about h3 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(19px, 2.4vw, 24px);
  line-height: 1.15;
  letter-spacing: -.015em;
  margin: 0 0 8px;
}
.page-about p {
  margin: 0 0 14px;
  line-height: 1.85;
  font-size: 15.5px;
}
.page-about p:last-child { margin-bottom: 0; }

.page-about .pa-head { margin-bottom: clamp(28px, 4vw, 48px); }
.page-about .pa-head__num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--lime);
  margin-bottom: 14px;
}
.page-about .pa-sec--light .pa-head__num { color: #6F7F53; }
.page-about .pa-head__lead {
  color: var(--mist-dim);
  max-width: 48ch;
  font-size: 16px;
}
.page-about .pa-sec--light .pa-head__lead { color: var(--pa-ink-soft); }

.page-about .pa-link {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(201, 255, 63, .45);
}
.page-about .pa-link:hover { border-bottom-color: var(--lime); }

/* ---------- 首屏 ---------- */
.page-about .pa-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(68px, 11vw, 132px) 0 clamp(48px, 7vw, 92px);
  background:
    radial-gradient(120% 90% at 88% 2%, rgba(201, 255, 63, .14), transparent 58%),
    linear-gradient(166deg, var(--ink-850) 0%, var(--ink-900) 66%);
  color: var(--mist);
}
.page-about .pa-hero__rings {
  position: absolute;
  top: -220px;
  right: -240px;
  width: 660px;
  height: 660px;
  border-radius: 50%;
  background: repeating-radial-gradient(circle at center,
    rgba(201, 255, 63, .16) 0 1px,
    transparent 1px 58px);
  -webkit-mask-image: radial-gradient(circle at center, #000 0 52%, transparent 78%);
  mask-image: radial-gradient(circle at center, #000 0 52%, transparent 78%);
  pointer-events: none;
}
.page-about .pa-hero__rings::after {
  content: "";
  position: absolute;
  inset: 46%;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 26px rgba(255, 90, 54, .5);
}
.page-about .pa-hero .breadcrumb { margin-bottom: clamp(26px, 4vw, 44px); }

.page-about .pa-hero__title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(40px, 10.4vw, 116px);
  line-height: .93;
  letter-spacing: -.035em;
  margin: 8px 0 0;
  max-width: 15ch;
}
.page-about .pa-hero__dot { color: var(--lime); }

.page-about .pa-hero__lead {
  margin-top: 22px;
  max-width: 40ch;
  color: var(--mist-dim);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
}

.page-about .pa-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  margin-top: 26px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  color: rgba(243, 247, 238, .58);
}
.page-about .pa-hero__facts span { position: relative; }
.page-about .pa-hero__facts span + span::before {
  content: "/";
  position: absolute;
  left: -14px;
  color: rgba(201, 255, 63, .55);
}

.page-about .pa-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

/* ---------- 01 时间线 ---------- */
.page-about .pa-timeline__banner { margin: 0 0 clamp(32px, 5vw, 56px); }

.page-about .pa-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 28px;
  position: relative;
}
.page-about .pa-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg,
    var(--lime) 0%,
    rgba(201, 255, 63, .34) 55%,
    rgba(201, 255, 63, .06) 100%);
}
.page-about .pa-timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  column-gap: 14px;
  padding-bottom: clamp(26px, 4vw, 42px);
}
.page-about .pa-timeline__item:last-child { padding-bottom: 0; }
.page-about .pa-timeline__item::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 9px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 0 4px rgba(201, 255, 63, .16);
}
.page-about .pa-timeline__year {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--lime);
  padding-top: 3px;
}
.page-about .pa-timeline__body { max-width: 60ch; }
.page-about .pa-timeline__body p { color: var(--mist-dim); font-size: 15px; }

/* ---------- 02 内容方法 ---------- */
.page-about .pa-method {
  display: grid;
  gap: clamp(30px, 5vw, 54px);
}
.page-about .pa-method__text { min-width: 0; }

.page-about .pa-types {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  border-top: 2px solid var(--ink-900);
}
.page-about .pa-types li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  column-gap: 14px;
  padding: 18px 0;
  border-bottom: 1px solid var(--pa-hair-dark);
}
.page-about .pa-types__idx {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: #7E8D80;
  padding-top: 5px;
}
.page-about .pa-types__name {
  font-size: 19px;
  margin-bottom: 6px;
}
.page-about .pa-types__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--pa-ink-soft);
}
.page-about .pa-method__figure { margin: 0; }

/* ---------- 03 团队 ---------- */
.page-about .pa-team__board {
  display: grid;
  gap: 1px;
  background: var(--pa-hair-light);
  border: 1px solid var(--pa-hair-light);
  border-radius: var(--radius-m);
  overflow: hidden;
  margin-bottom: clamp(28px, 4vw, 44px);
}
.page-about .pa-team__cell {
  background: var(--ink-850);
  padding: 22px 20px;
}
.page-about .pa-team__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(34px, 6vw, 54px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.04em;
  color: var(--lime);
}
.page-about .pa-team__cell:last-child .pa-team__num { color: var(--teal); }
.page-about .pa-team__label {
  display: block;
  margin-top: 10px;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--mist-dim);
}

.page-about .pa-flow {
  list-style: none;
  margin: 0 0 clamp(24px, 4vw, 38px);
  padding: 0;
  display: grid;
  gap: 20px;
}
.page-about .pa-flow li {
  border-top: 2px solid rgba(243, 247, 238, .14);
  padding-top: 14px;
}
.page-about .pa-flow__idx {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--lime);
  margin-bottom: 8px;
}
.page-about .pa-flow__name {
  display: block;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 17px;
  letter-spacing: -.01em;
  margin-bottom: 5px;
}
.page-about .pa-flow__note {
  display: block;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mist-dim);
}
.page-about .pa-team__foot {
  font-size: 14.5px;
  color: var(--mist-dim);
  border-left: 2px solid rgba(46, 217, 195, .5);
  padding-left: 14px;
}

/* ---------- 04 城市 ---------- */
.page-about .pa-cities__figure { margin: 0 0 clamp(24px, 4vw, 36px); }
.page-about .pa-cities {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.page-about .pa-cities li {
  border: 1px solid var(--hair-lime);
  border-radius: var(--radius-pill);
  background: rgba(201, 255, 63, .07);
  padding: 9px 20px;
  font-size: 14.5px;
  letter-spacing: .02em;
  color: var(--mist);
}
.page-about .pa-cities__note {
  margin-top: 24px;
  max-width: 46ch;
  color: var(--mist-dim);
  font-size: 15px;
}

/* ---------- 05 合作与荣誉 ---------- */
.page-about .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: clamp(22px, 3vw, 30px);
}
.page-about .filter-btn {
  font-family: inherit;
  font-size: 14px;
  padding: 9px 20px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--pa-hair-dark);
  background: transparent;
  color: #2A3A32;
  cursor: pointer;
  transition: background .18s ease, color .18s ease, border-color .18s ease;
}
.page-about .filter-btn:hover { border-color: var(--ink-900); }
.page-about .filter-btn[aria-pressed="true"] {
  background: var(--ink-900);
  border-color: var(--ink-900);
  color: var(--lime);
}

.page-about .pa-cards {
  display: grid;
  gap: 14px;
}
.page-about .pa-card {
  background: #FFFFFF;
  border-left: 3px solid var(--lime);
  border-radius: 0 var(--radius-m) var(--radius-m) 0;
  padding: 20px 22px;
}
.page-about .pa-card--award { border-left-color: var(--gold); }
.page-about .pa-card h3 { font-size: 19px; margin-bottom: 8px; }
.page-about .pa-card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--pa-ink-soft);
}
.page-about .pa-card__tag {
  display: block;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .16em;
  color: #7E8D80;
  margin-bottom: 10px;
}
.page-about .filter-empty {
  margin-top: 20px;
  font-size: 14px;
  color: var(--pa-ink-soft);
}

/* ---------- 06 继续 ---------- */
.page-about .pa-cta .pa-cta__inner {
  border: 1px solid var(--hair-lime);
  border-radius: var(--radius-l);
  padding: clamp(28px, 5vw, 62px);
  background:
    radial-gradient(90% 130% at 6% 0%, rgba(201, 255, 63, .12), transparent 62%),
    linear-gradient(140deg, rgba(46, 217, 195, .08), transparent 70%);
}
.page-about .pa-cta h2 { max-width: 18ch; }
.page-about .pa-cta__lead {
  max-width: 46ch;
  color: var(--mist-dim);
  font-size: 15.5px;
}
.page-about .pa-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .pa-team__board { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .page-about .pa-flow { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px 28px; }
  .page-about .pa-cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .page-about .pa-team__cell { padding: 28px 26px; }
}

@media (min-width: 900px) {
  .page-about .pa-hero { padding-bottom: clamp(72px, 8vw, 110px); }
  .page-about .pa-hero__lead { font-size: 17px; }

  .page-about .pa-timeline { padding-left: 44px; }
  .page-about .pa-timeline::before { left: 7px; }
  .page-about .pa-timeline__item {
    grid-template-columns: 112px minmax(0, 1fr);
    column-gap: 30px;
  }
  .page-about .pa-timeline__item::before {
    left: -37px;
    top: 12px;
    width: 10px;
    height: 10px;
  }
  .page-about .pa-timeline__year { font-size: 22px; padding-top: 4px; }
  .page-about .pa-timeline__body p { font-size: 16px; }

  .page-about .pa-method {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, .7fr);
    align-items: start;
  }
  .page-about .pa-method__figure { margin-top: 8px; }

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

@media (min-width: 1100px) {
  .page-about .pa-cards { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .page-about .pa-cards .pa-card:nth-child(1) { grid-column: span 1; }
}
<<<END>>>