.page-about {
  --about-sticky: calc(var(--header-h) + 28px);
  background: var(--ink);
  color: var(--mist);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: calc(var(--header-h) + clamp(40px, 7vw, 88px)) 0 clamp(40px, 6vw, 72px);
  background:
    radial-gradient(115% 85% at 92% -12%, rgba(34, 227, 210, 0.2), transparent 58%),
    radial-gradient(85% 75% at 2% 6%, rgba(138, 92, 255, 0.17), transparent 62%),
    radial-gradient(70% 60% at 60% 110%, rgba(255, 61, 139, 0.1), transparent 70%),
    var(--ink);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-hero__aura {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(rgba(244, 247, 250, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(244, 247, 250, 0.035) 1px, transparent 1px);
  background-size: 84px 84px;
  mask-image: radial-gradient(120% 90% at 70% 20%, #000 12%, transparent 74%);
  -webkit-mask-image: radial-gradient(120% 90% at 70% 20%, #000 12%, transparent 74%);
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(28px, 4vw, 48px);
  align-items: center;
}

.page-about .about-hero__copy > * + * {
  margin-top: 14px;
}

.page-about .about-hero__eyebrow {
  margin-top: 20px;
  color: var(--cyan);
}

.page-about .about-hero__title {
  font-size: clamp(2rem, 5.4vw, 4.1rem);
  line-height: 1.14;
  letter-spacing: -0.02em;
  margin: 0;
  color: var(--mist);
}

.page-about .about-hero__lead {
  max-width: 60ch;
  color: var(--graphite-2);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-hero__figure {
  margin: 0;
  position: relative;
  border: 1px solid var(--line);
  background: linear-gradient(150deg, rgba(34, 227, 210, 0.14), rgba(255, 61, 139, 0.12) 52%, rgba(138, 92, 255, 0.16));
  box-shadow: var(--shadow-soft);
  overflow: hidden;
}

.page-about .about-hero__figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(70% 70% at 78% 18%, rgba(34, 227, 210, 0.22), transparent 68%);
  pointer-events: none;
}

.page-about .about-hero__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  opacity: 0.9;
}

.page-about .about-stats {
  position: relative;
  z-index: 1;
  list-style: none;
  margin: clamp(36px, 5vw, 60px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-stat {
  background: var(--ink-2);
  padding: 18px 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.page-about .about-stat__num {
  font-family: var(--font-mono);
  font-size: clamp(1.35rem, 3vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--cyan);
  line-height: 1.1;
}

.page-about .about-stat__label {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--graphite);
}

/* ---------- 时间轴 ---------- */
.page-about .about-tl {
  padding: clamp(56px, 9vw, 118px) 0;
  background: var(--ink);
}

.page-about .about-tl__head {
  max-width: 62ch;
  margin-bottom: clamp(36px, 5vw, 64px);
}

.page-about .about-tl__title {
  margin: 10px 0 0;
  font-size: clamp(1.7rem, 3.6vw, 2.6rem);
  line-height: 1.24;
}

.page-about .about-tl__intro {
  margin: 16px 0 0;
  color: var(--graphite-2);
}

.page-about .about-tl__layout {
  display: grid;
  gap: clamp(24px, 4vw, 56px);
}

.page-about .about-tl__rail {
  display: none;
}

.page-about .about-tl__rail-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--graphite);
  margin: 0 0 16px;
}

.page-about .about-tl__rail-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
  border-left: 1px solid var(--line);
}

.page-about .about-tl__rail-link {
  display: block;
  padding: 6px 0 6px 16px;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--graphite);
  text-decoration: none;
  border-left: 1px solid transparent;
  margin-left: -1px;
  transition: color 0.24s var(--ease), border-color 0.24s var(--ease);
}

.page-about .about-tl__rail-link:hover,
.page-about .about-tl__rail-link:focus-visible {
  color: var(--cyan);
  border-left-color: var(--cyan);
}

.page-about .about-tl__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(30px, 4.5vw, 54px);
}

.page-about .about-tl__node {
  position: relative;
  padding-left: clamp(20px, 3vw, 34px);
  border-left: 1px solid var(--line);
}

.page-about .about-tl__node::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 16px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ink);
  border: 1px solid var(--line-cyan);
  transition: background 0.34s var(--ease), box-shadow 0.34s var(--ease), transform 0.34s var(--ease);
}

.page-about .about-tl__node.is-in::before {
  background: var(--cyan);
  box-shadow: 0 0 0 5px rgba(34, 227, 210, 0.12), 0 0 20px rgba(34, 227, 210, 0.52);
  transform: scale(1.08);
}

.page-about .about-tl__year {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(2.1rem, 5.6vw, 3.4rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--gold);
}

.page-about .about-tl__body {
  margin-top: 14px;
}

.page-about .about-tl__node-title {
  margin: 12px 0 0;
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  line-height: 1.45;
  color: var(--mist);
}

.page-about .about-tl__node-text {
  margin: 8px 0 0;
  max-width: 64ch;
  color: var(--graphite-2);
  font-size: 16px;
  line-height: 1.8;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  background: linear-gradient(180deg, var(--mint) 0%, #E4FAF6 46%, var(--mist) 100%);
  color: var(--ink);
  padding: clamp(56px, 9vw, 118px) 0;
}

.page-about .about-team__head {
  display: grid;
  gap: clamp(18px, 3vw, 40px);
  margin-bottom: clamp(32px, 5vw, 56px);
}

.page-about .about-team__eyebrow {
  color: #0C7C74;
}

.page-about .about-team__title {
  margin: 10px 0 0;
  color: var(--ink);
  font-size: clamp(1.7rem, 3.6vw, 2.6rem);
  line-height: 1.24;
}

.page-about .about-team__intro {
  margin: 0;
  color: #3A4657;
  font-size: 16px;
  line-height: 1.85;
}

.page-about .about-team__grid {
  display: grid;
  gap: clamp(22px, 3vw, 36px);
  align-items: start;
}

.page-about .about-team__figure {
  margin: 0;
  border: 1px solid rgba(7, 8, 12, 0.1);
  background: linear-gradient(150deg, rgba(34, 227, 210, 0.18), rgba(138, 92, 255, 0.14) 55%, rgba(255, 61, 139, 0.14));
  overflow: hidden;
  box-shadow: 0 28px 60px -46px rgba(7, 8, 12, 0.7);
}

.page-about .about-team__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  mix-blend-mode: multiply;
  opacity: 0.94;
}

.page-about .about-team__panel {
  background: var(--ink);
  border: 1px solid rgba(7, 8, 12, 0.14);
  box-shadow: 0 30px 64px -48px rgba(7, 8, 12, 0.72);
  padding: clamp(18px, 3vw, 30px);
  color: var(--mist);
  min-width: 0;
}

.page-about .about-team__tabs {
  min-width: 0;
}

.page-about .about-team__panel-title {
  margin: 18px 0 0;
  font-size: 1.05rem;
  line-height: 1.5;
  color: var(--cyan);
}

.page-about .about-team__panel p {
  margin: 10px 0 0;
  color: var(--graphite-2);
  font-size: 15.5px;
  line-height: 1.85;
}

.page-about .about-team__list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-team__list li {
  position: relative;
  padding-left: 20px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .about-team__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 1px;
  background: var(--gold);
}

/* ---------- 内容与工程能力 ---------- */
.page-about .about-craft {
  background: var(--ink);
  padding: clamp(56px, 9vw, 118px) 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-craft__head {
  max-width: 66ch;
  margin-bottom: clamp(30px, 4vw, 52px);
}

.page-about .about-craft__title {
  margin: 10px 0 0;
  font-size: clamp(1.6rem, 3.4vw, 2.45rem);
  line-height: 1.26;
}

.page-about .about-craft__lead {
  margin: 16px 0 0;
  color: var(--graphite-2);
}

.page-about .about-craft__grid {
  gap: clamp(14px, 2vw, 20px);
}

.page-about .about-craft__card {
  position: relative;
  background: var(--ink-2);
  border: 1px solid var(--line-soft);
  padding: clamp(20px, 2.6vw, 28px);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
}

.page-about .about-craft__card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, var(--cyan), rgba(255, 61, 139, 0.6) 55%, transparent);
  opacity: 0.7;
}

.page-about .about-craft__card .bjj-card__title {
  margin: 0;
  font-size: 1.02rem;
  line-height: 1.5;
  color: var(--mist);
}

.page-about .about-craft__card .bjj-card__text {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--graphite-2);
}

.page-about .about-craft__assure {
  margin-top: clamp(26px, 4vw, 44px);
  padding-top: clamp(22px, 3vw, 32px);
  border-top: 1px solid var(--line-soft);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.page-about .about-craft__assure-text {
  margin: 0;
  max-width: 62ch;
  color: var(--graphite-2);
  font-size: 15.5px;
  line-height: 1.85;
}

/* ---------- 服务范围 ---------- */
.page-about .about-region {
  position: relative;
  overflow: hidden;
  padding: clamp(64px, 10vw, 140px) 0;
  background: var(--ink-3);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-region__bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.page-about .about-region__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.32;
  filter: saturate(1.1);
}

.page-about .about-region::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(80% 70% at 78% 28%, rgba(34, 227, 210, 0.2), transparent 64%),
    linear-gradient(180deg, rgba(7, 8, 12, 0.86) 0%, rgba(7, 8, 12, 0.72) 55%, rgba(7, 8, 12, 0.94) 100%);
  pointer-events: none;
}

.page-about .about-region__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-region__copy {
  max-width: 64ch;
}

.page-about .about-region__copy .bjj-eyebrow {
  color: var(--cyan);
}

.page-about .about-region__title {
  margin: 10px 0 0;
  font-size: clamp(1.6rem, 3.6vw, 2.6rem);
  line-height: 1.24;
}

.page-about .about-region__lead {
  margin: 18px 0 0;
  color: var(--graphite-2);
  font-size: 16.5px;
  line-height: 1.88;
}

.page-about .about-region__facts {
  list-style: none;
  margin: clamp(28px, 4vw, 46px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-region__fact {
  background: rgba(14, 20, 32, 0.82);
  padding: 20px 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
}

.page-about .about-region__fact-num {
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--magenta);
}

.page-about .about-region__fact-label {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--graphite-2);
}

.page-about .about-region__note {
  margin: clamp(24px, 3.4vw, 36px) 0 0;
  max-width: 68ch;
  color: var(--graphite-2);
  font-size: 15.5px;
  line-height: 1.85;
  padding-left: 16px;
  border-left: 1px solid var(--line-cyan);
}

/* ---------- 合作生态 ---------- */
.page-about .about-partner {
  background: var(--mist);
  color: var(--ink);
  padding: clamp(56px, 9vw, 118px) 0;
}

.page-about .about-partner__head {
  max-width: 64ch;
  margin-bottom: clamp(30px, 4vw, 52px);
}

.page-about .about-partner__eyebrow {
  color: #B02A63;
}

.page-about .about-partner__title {
  margin: 10px 0 0;
  color: var(--ink);
  font-size: clamp(1.6rem, 3.5vw, 2.5rem);
  line-height: 1.26;
}

.page-about .about-partner__lead {
  margin: 16px 0 0;
  color: #3A4657;
  font-size: 16px;
  line-height: 1.86;
}

.page-about .about-partner__grid {
  display: grid;
  gap: 1px;
  background: rgba(7, 8, 12, 0.12);
  border: 1px solid rgba(7, 8, 12, 0.12);
}

.page-about .about-partner__item {
  background: var(--mist);
  padding: clamp(20px, 2.8vw, 30px);
  min-width: 0;
}

.page-about .about-partner__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #0C7C74;
  border: 1px solid rgba(12, 124, 116, 0.34);
  padding: 4px 9px;
}

.page-about .about-partner__item-title {
  margin: 14px 0 0;
  font-size: 1.05rem;
  line-height: 1.45;
  color: var(--ink);
}

.page-about .about-partner__item p {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.82;
  color: #414D5E;
}

.page-about .about-partner__award {
  margin-top: clamp(26px, 4vw, 42px);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  padding: clamp(20px, 2.8vw, 28px);
  background: var(--ink);
  color: var(--mist);
  border: 1px solid rgba(232, 176, 75, 0.4);
}

.page-about .about-partner__award p {
  margin: 0;
  flex: 1 1 320px;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--graphite-2);
}

/* ---------- 更新节奏 ---------- */
.page-about .about-cadence {
  background: var(--ink);
  padding: clamp(56px, 9vw, 118px) 0;
}

.page-about .about-cadence__head {
  max-width: 66ch;
  margin-bottom: clamp(30px, 4vw, 52px);
}

.page-about .about-cadence__title {
  margin: 10px 0 0;
  font-size: clamp(1.6rem, 3.5vw, 2.5rem);
  line-height: 1.26;
}

.page-about .about-cadence__lead {
  margin: 16px 0 0;
  color: var(--graphite-2);
}

.page-about .about-cadence__grid {
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-cadence__item {
  background: var(--ink-2);
  padding: clamp(20px, 2.8vw, 30px);
  min-width: 0;
}

.page-about .about-cadence__cycle {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gold);
  border-bottom: 1px solid var(--line-gold);
  padding-bottom: 4px;
}

.page-about .about-cadence__item-title {
  margin: 16px 0 0;
  font-size: 1.05rem;
  line-height: 1.45;
  color: var(--mist);
}

.page-about .about-cadence__item p {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--graphite-2);
}

.page-about .about-cadence__subscribe {
  margin-top: clamp(26px, 4vw, 44px);
  padding: clamp(22px, 3vw, 34px);
  background: linear-gradient(135deg, rgba(34, 227, 210, 0.11), rgba(138, 92, 255, 0.12) 58%, rgba(255, 61, 139, 0.1));
  border: 1px solid var(--line-cyan);
  display: grid;
  gap: 22px;
  align-items: center;
}

.page-about .about-cadence__subscribe-copy h3 {
  margin: 0;
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  line-height: 1.45;
  color: var(--mist);
}

.page-about .about-cadence__subscribe-copy p {
  margin: 10px 0 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--graphite-2);
}

.page-about .about-cadence__subscribe-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 结尾 ---------- */
.page-about .about-cta {
  position: relative;
  overflow: hidden;
  padding: clamp(56px, 8vw, 100px) 0 clamp(64px, 9vw, 112px);
  background: var(--ink-3);
  border-top: 1px solid var(--line-soft);
}

.page-about .about-cta__glow {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(60% 120% at 14% 0%, rgba(255, 61, 139, 0.22), transparent 62%),
    radial-gradient(55% 110% at 88% 100%, rgba(34, 227, 210, 0.2), transparent 66%);
}

.page-about .about-cta__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 26px;
  align-items: center;
}

.page-about .about-cta__title {
  margin: 0;
  font-size: clamp(1.5rem, 3.3vw, 2.3rem);
  line-height: 1.28;
}

.page-about .about-cta__copy p {
  margin: 14px 0 0;
  max-width: 62ch;
  color: var(--graphite-2);
  font-size: 16px;
  line-height: 1.86;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .about-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

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

@media (min-width: 860px) {
  .page-about .about-team__head {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: end;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 40px;
  }

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

  .page-about .about-cadence__subscribe {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 34px;
  }
}

@media (min-width: 980px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(36px, 5vw, 64px);
  }

  .page-about .about-stats {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-about .about-tl__layout {
    grid-template-columns: 176px minmax(0, 1fr);
  }

  .page-about .about-tl__rail {
    display: block;
    position: sticky;
    top: var(--about-sticky);
    align-self: start;
  }

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

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

@media (prefers-reduced-motion: reduce) {
  .page-about .about-tl__node::before,
  .page-about .about-tl__rail-link {
    transition: none;
  }

  .page-about .about-tl__node.is-in::before {
    transform: none;
  }
}
<<<END>>>