.page-about {
  --ab-num: clamp(3rem, 11vw, 7.2rem);
  --ab-gap: clamp(20px, 3vw, 40px);
  --ab-radius: 16px;
  --ab-line: rgba(142, 147, 168, .30);
  --ab-line-soft: rgba(122, 77, 255, .24);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(30px, 5vw, 56px) clamp(48px, 7vw, 92px);
}

.page-about .about-hero__beam {
  position: absolute;
  right: -18%;
  top: -24%;
  width: min(680px, 92vw);
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  background: radial-gradient(circle at 42% 44%, rgba(122, 77, 255, .48), rgba(58, 31, 115, .22) 48%, transparent 70%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--phantom) 30%, var(--lime) 70%, transparent);
  opacity: .55;
}

.page-about .about-hero .gs-breadcrumb {
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-about .about-hero__title {
  max-width: 15ch;
  margin-top: 10px;
  position: relative;
  z-index: 1;
}

.page-about .about-hero__lede {
  max-width: 62ch;
  margin-top: clamp(14px, 2vw, 22px);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: clamp(26px, 4vw, 46px);
}

.page-about .about-stat {
  padding: 16px 16px 14px;
}

.page-about .about-stat__unit {
  font-size: .5em;
  margin-left: 2px;
  letter-spacing: 0;
}

/* ---------- 章节通用骨架 ---------- */
.page-about .about-chapter {
  position: relative;
}

.page-about .about-chapter__grid {
  display: grid;
  gap: var(--ab-gap);
}

.page-about .about-chapter__head {
  position: relative;
}

.page-about .about-chapter__num {
  display: block;
  font-family: var(--font-display);
  font-size: var(--ab-num);
  line-height: .78;
  letter-spacing: -.04em;
  margin-bottom: 8px;
  color: rgba(122, 77, 255, .2);
}

@supports ((-webkit-text-stroke: 1px currentColor)) {
  .page-about .about-chapter__num {
    color: transparent;
    -webkit-text-stroke: 2px rgba(122, 77, 255, .58);
  }
  .page-about .gs-section--cream .about-chapter__num {
    -webkit-text-stroke-color: rgba(58, 31, 115, .44);
  }
}

.page-about .about-chapter__head .gs-title--m {
  margin-top: 6px;
  max-width: 20ch;
  text-wrap: balance;
}

.page-about .about-chapter__intro {
  max-width: 58ch;
  margin-top: 12px;
  color: var(--steel);
}

.page-about .gs-section--cream .about-chapter__intro {
  color: rgba(34, 27, 26, .68);
}

.page-about .about-chapter__main > p + p {
  margin-top: 16px;
}

.page-about .about-chapter__main .gs-lede + p {
  margin-top: 16px;
}

.page-about .gs-section--cream .gs-eyebrow {
  color: var(--phantom);
}

/* ---------- 章节 01 小卡 ---------- */
.page-about .about-mini-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin-top: 26px;
}

.page-about .about-mini {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 14px;
  border-left: 3px solid var(--phantom);
  border-radius: 0 var(--radius-s) var(--radius-s) 0;
  background: rgba(58, 31, 115, .07);
}

.page-about .about-mini__k {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--shadow-purple);
  min-width: 3.6em;
}

.page-about .about-mini__v {
  font-size: 15px;
  line-height: 1.55;
  color: rgba(34, 27, 26, .84);
}

/* ---------- 章节 02 事实标签 ---------- */
.page-about .about-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
}

.page-about .about-shot {
  margin-top: clamp(26px, 4vw, 48px);
}

/* ---------- 章节 03 时间轴 ---------- */
.page-about .about-chapter__head--wide {
  max-width: 62ch;
  margin-bottom: clamp(26px, 4vw, 46px);
}

.page-about .about-tl {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 6px 0 6px 30px;
  display: grid;
  gap: 16px;
}

.page-about .about-tl::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 10px;
  bottom: 10px;
  width: 3px;
  border-radius: 3px;
  background: linear-gradient(180deg, var(--phantom), var(--lime) 72%, rgba(255, 210, 63, .85));
  opacity: .8;
}

.page-about .about-tl__item {
  position: relative;
  display: grid;
  gap: 10px;
}

.page-about .about-tl__item::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 8px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--night);
  border: 3px solid var(--phantom);
  box-shadow: 0 0 0 4px rgba(122, 77, 255, .14);
  transition: border-color .18s var(--ease), box-shadow .18s var(--ease);
}

.page-about .gs-section--cream .about-tl__item::before {
  background: var(--cream);
}

.page-about .about-tl__item:hover::before {
  border-color: var(--lime);
  box-shadow: 0 0 0 6px rgba(198, 255, 74, .2);
}

.page-about .about-tl__year {
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 4vw, 1.9rem);
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--phantom);
  font-variant-numeric: tabular-nums;
}

.page-about .gs-section--cream .about-tl__year {
  color: var(--shadow-purple);
}

.page-about .about-tl__body {
  padding: 16px 18px;
  border: 1px solid var(--ab-line-soft);
  border-radius: var(--ab-radius-s, 12px);
  border-radius: 12px;
  background: rgba(233, 230, 245, .04);
  transition: transform .18s var(--ease), border-color .18s var(--ease);
}

.page-about .gs-section--cream .about-tl__body {
  background: rgba(255, 255, 255, .62);
  border-color: rgba(58, 31, 115, .16);
}

.page-about .about-tl__item:hover .about-tl__body {
  transform: translateY(-3px);
  border-color: rgba(198, 255, 74, .55);
}

.page-about .about-tl__stage {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-about .gs-section--cream .about-tl__stage {
  color: var(--phantom);
}

.page-about .about-tl__title {
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 3.4vw, 1.5rem);
  line-height: 1.2;
  letter-spacing: -.01em;
  margin: 6px 0 8px;
}

.page-about .about-tl__text {
  font-size: 16px;
  line-height: 1.72;
  color: var(--mist);
}

.page-about .gs-section--cream .about-tl__text {
  color: rgba(34, 27, 26, .8);
}

/* ---------- 章节 04 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: var(--ab-gap);
  margin-top: clamp(26px, 4vw, 46px);
}

.page-about .about-board {
  position: relative;
  padding: 26px 20px;
  border: 1px solid var(--ab-line);
  border-radius: var(--ab-radius);
  background:
    radial-gradient(circle at 50% 50%, rgba(122, 77, 255, .16), transparent 58%),
    rgba(233, 230, 245, .03);
  overflow: hidden;
}

.page-about .about-board__pitch {
  position: absolute;
  inset: 14px;
  border: 1px solid rgba(122, 77, 255, .2);
  border-radius: 10px;
  pointer-events: none;
}

.page-about .about-board__halfline {
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 1px;
  background: rgba(122, 77, 255, .2);
}

.page-about .about-board__center {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 88px;
  height: 88px;
  margin: -44px 0 0 -44px;
  border: 1px solid rgba(122, 77, 255, .2);
  border-radius: 50%;
}

.page-about .about-board__roles {
  position: relative;
  z-index: 1;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-board__role {
  padding: 15px 16px;
  border-left: 4px solid var(--phantom);
  border-radius: 0 12px 12px 0;
  background: rgba(11, 11, 20, .62);
  backdrop-filter: blur(5px);
}

.page-about .about-board__role--lime {
  border-left-color: var(--lime);
}

.page-about .about-board__role--purple {
  border-left-color: var(--phantom);
}

.page-about .about-board__role--yellow {
  border-left-color: var(--yellow);
}

.page-about .about-board__pos {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--steel);
  margin-bottom: 6px;
}

.page-about .about-board__role strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.1rem;
  letter-spacing: -.01em;
  color: var(--mist);
  margin-bottom: 6px;
}

.page-about .about-board__role p {
  font-size: 15px;
  line-height: 1.65;
  color: rgba(233, 230, 245, .76);
}

.page-about .about-team__shot {
  border-radius: var(--ab-radius);
  overflow: hidden;
}

/* ---------- 章节 06 折叠 ---------- */
.page-about .about-collapse {
  margin-top: 26px;
  display: grid;
  gap: 10px;
}

.page-about .about-collapse__item {
  border: 1px solid var(--ab-line);
  border-radius: 12px;
  background: rgba(233, 230, 245, .03);
  overflow: hidden;
}

.page-about .about-collapse__toggle {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 15px 16px;
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 600;
  color: var(--mist);
  text-align: left;
  cursor: pointer;
}

.page-about .about-collapse__idx {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  flex: none;
  border-radius: 50%;
  border: 1px solid var(--phantom);
  color: var(--lime);
  font-size: 12px;
}

.page-about .about-collapse__panel {
  padding: 0 16px 16px 54px;
  font-size: 15.5px;
  line-height: 1.72;
  color: rgba(233, 230, 245, .8);
}

.page-about .about-collapse__panel p + p {
  margin-top: 12px;
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  padding-block: clamp(40px, 6vw, 76px);
}

.page-about .about-cta__panel {
  padding: clamp(26px, 4vw, 48px);
  border-radius: var(--ab-radius);
  background-image:
    linear-gradient(150deg, rgba(122, 77, 255, .26), rgba(198, 255, 74, .08) 62%, transparent);
}

.page-about .about-cta__panel .gs-title--m {
  max-width: 20ch;
  margin: 8px 0 12px;
}

.page-about .about-cta__panel .gs-lede {
  max-width: 54ch;
}

.page-about .about-cta__actions {
  margin-top: 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-mini-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-chapter__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 6fr);
    column-gap: clamp(32px, 4vw, 64px);
    align-items: start;
  }

  .page-about .about-chapter__grid--flip {
    grid-template-columns: minmax(0, 6fr) minmax(0, 4fr);
  }

  .page-about .about-chapter__head {
    position: sticky;
    top: 84px;
  }

  .page-about .about-chapter__head--wide {
    position: static;
  }

  .page-about .about-tl {
    padding-left: 40px;
  }

  .page-about .about-tl__item {
    grid-template-columns: 5.4em minmax(0, 1fr);
    align-items: start;
    gap: 20px;
  }

  .page-about .about-tl__item::before {
    left: -40px;
    top: 12px;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: stretch;
  }

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

  .page-about .about-team__shot {
    margin: 0;
  }
}

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

  .page-about .about-tl__item:hover .about-tl__body {
    transform: none;
  }
}
<<<END>>>

.page-about {
  --ab-radius-s: var(--ab-radius);
}