.page-about {
  --ab-sub: #A9B3C9;
  --ab-cream-ink: #12161f;
  --ab-cream-sub: rgba(18, 22, 31, .70);
  --ab-cream-line: rgba(18, 22, 31, .15);
  background: var(--c-deep);
  color: var(--c-white);
}

/* ---------- 首屏提要 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(26px, 4vw, 46px) 0 clamp(48px, 7vw, 92px);
  overflow: hidden;
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  left: -8%;
  right: -8%;
  top: 62%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line-violet) 22%, var(--c-cyan) 58%, transparent);
  transform: rotate(-12deg);
  opacity: .75;
  z-index: 0;
}
.page-about .about-hero .wrap {
  position: relative;
  z-index: 1;
}
.page-about .about-hero__kicker {
  margin: 0;
  font-family: var(--font-data);
  font-size: .76rem;
  letter-spacing: .2em;
  color: var(--c-cyan);
}
.page-about .about-hero__title {
  margin: clamp(14px, 2.2vw, 24px) 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.95rem, 6.2vw, 4rem);
  line-height: 1.08;
  letter-spacing: -.02em;
  color: var(--c-white);
}
.page-about .about-hero__lede {
  margin: clamp(18px, 2.6vw, 28px) 0 0;
  max-width: 62ch;
  font-size: clamp(1rem, 1.6vw, 1.1rem);
  line-height: 1.85;
  color: var(--c-white);
}
.page-about .about-hero__stats {
  list-style: none;
  margin: clamp(28px, 4vw, 46px) 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);
  border-radius: var(--r-md);
  overflow: hidden;
}
.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: clamp(14px, 2.2vw, 22px);
  background: var(--c-cabin);
}
.page-about .about-stat__v {
  font-family: var(--font-data);
  font-size: clamp(1.5rem, 3.4vw, 2.15rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--c-cyan);
}
.page-about .about-stat__k {
  font-size: .82rem;
  line-height: 1.55;
  color: var(--ab-sub);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-section {
  padding: clamp(52px, 8vw, 104px) 0;
  border-top: 1px solid var(--line-soft);
}
.page-about .about-section--cream {
  background: var(--c-cream);
  color: var(--ab-cream-ink);
  border-top-color: var(--ab-cream-line);
}
.page-about .about-section__grid {
  display: grid;
  gap: clamp(18px, 3vw, 28px);
}
.page-about .about-section__rail {
  display: flex;
  align-items: baseline;
  gap: 14px;
}
.page-about .about-section__rail::after {
  content: "";
  display: none;
}
.page-about .about-section__tag {
  font-size: .78rem;
  letter-spacing: .16em;
  color: var(--ab-sub);
}
.page-about .about-section--cream .about-section__tag {
  color: var(--ab-cream-sub);
}
.page-about .chapter__title {
  margin: 0 0 clamp(14px, 2vw, 20px);
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 3.5vw, 2.35rem);
  line-height: 1.22;
  letter-spacing: -.01em;
}
.page-about .section__lede {
  margin: 0 0 clamp(22px, 3vw, 34px);
  max-width: 60ch;
  font-size: clamp(1rem, 1.5vw, 1.06rem);
  line-height: 1.85;
  color: var(--c-white);
}
.page-about .about-section--cream .section__lede {
  color: var(--ab-cream-sub);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 0 0 clamp(24px, 3.4vw, 38px);
}
.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--r-md);
  filter: saturate(.82) brightness(.9) contrast(1.06);
  background: var(--c-cabin);
}
.page-about .about-figure .figure__caption {
  margin-top: 10px;
  font-size: .8rem;
  line-height: 1.6;
  color: var(--ab-sub);
}
.page-about .about-section--cream .about-figure .figure__caption {
  color: var(--ab-cream-sub);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 2px solid var(--ab-cream-line);
}
.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 clamp(24px, 3.4vw, 36px) clamp(18px, 2.6vw, 30px);
}
.page-about .about-timeline__item:last-child {
  padding-bottom: 0;
}
.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 6px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--c-cream);
  border: 2px solid var(--c-clay);
}
.page-about .about-timeline__mark {
  display: inline-block;
  margin-bottom: 8px;
  font-family: var(--font-data);
  font-size: .78rem;
  letter-spacing: .14em;
  color: #8C5A38;
}
.page-about .about-timeline__name {
  margin: 0 0 8px;
  font-size: clamp(1.05rem, 1.9vw, 1.28rem);
  line-height: 1.4;
}
.page-about .about-timeline__text {
  margin: 0;
  max-width: 58ch;
  font-size: .94rem;
  line-height: 1.85;
  color: var(--ab-cream-sub);
}

/* ---------- 赛后流程 ---------- */
.page-about .about-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(14px, 2.2vw, 20px);
}
.page-about .about-flow__step {
  padding: clamp(18px, 2.4vw, 26px);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--glass);
}
.page-about .about-flow__step:nth-child(2) {
  border-color: var(--line-violet);
}
.page-about .about-flow__time {
  margin: 0 0 10px;
  font-family: var(--font-data);
  font-size: .78rem;
  letter-spacing: .1em;
  color: var(--c-cyan);
}
.page-about .about-flow__title {
  margin: 0 0 10px;
  font-size: 1.05rem;
  line-height: 1.45;
  color: var(--c-white);
}
.page-about .about-flow__text {
  margin: 0;
  font-size: .92rem;
  line-height: 1.8;
  color: var(--ab-sub);
}

/* ---------- 团队 ---------- */
.page-about .about-team__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(10px, 1.6vw, 14px);
}
.page-about .about-team__item {
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--c-cabin);
  transition: border-color var(--t-fast) var(--ease);
}
.page-about .about-team__item:hover,
.page-about .about-team__item[open] {
  border-color: var(--line-violet);
}
.page-about .about-team__summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: clamp(14px, 2vw, 18px) clamp(16px, 2.2vw, 22px);
  cursor: pointer;
  list-style: none;
}
.page-about .about-team__summary::-webkit-details-marker {
  display: none;
}
.page-about .about-team__summary::before {
  content: "";
  flex: 0 0 auto;
  width: 7px;
  height: 7px;
  border-right: 1.5px solid var(--c-cyan);
  border-bottom: 1.5px solid var(--c-cyan);
  transform: rotate(45deg);
  transition: transform var(--t-fast) var(--ease);
}
.page-about .about-team__item[open] .about-team__summary::before {
  transform: rotate(-135deg);
}
.page-about .about-team__name {
  flex: 1 1 auto;
  font-size: 1rem;
  font-weight: 600;
  color: var(--c-white);
}
.page-about .about-team__num {
  flex: 0 0 auto;
  font-family: var(--font-data);
  font-size: .88rem;
  color: var(--c-cyan);
}
.page-about .about-team__desc {
  margin: 0;
  padding: 14px clamp(16px, 2.2vw, 22px) clamp(16px, 2.2vw, 20px);
  border-top: 1px dashed var(--line-soft);
  font-size: .9rem;
  line-height: 1.8;
  color: var(--ab-sub);
}

/* ---------- 档案规模 ---------- */
.page-about .about-archive {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--ab-cream-line);
  border: 1px solid var(--ab-cream-line);
  border-radius: var(--r-md);
  overflow: hidden;
}
.page-about .about-archive__item {
  padding: clamp(18px, 2.4vw, 26px);
  background: var(--c-cream);
}
.page-about .about-archive__v {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-data);
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: #8C5A38;
}
.page-about .about-archive__h {
  margin: 0 0 8px;
  font-size: 1.02rem;
  line-height: 1.45;
}
.page-about .about-archive__p {
  margin: 0;
  font-size: .9rem;
  line-height: 1.8;
  color: var(--ab-cream-sub);
}

/* ---------- 备案与授权 ---------- */
.page-about .about-cred {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}
.page-about .about-cred__item {
  border-bottom: 1px solid var(--line);
}
.page-about .about-cred__summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: clamp(15px, 2vw, 20px) 0;
  cursor: pointer;
  list-style: none;
}
.page-about .about-cred__summary::-webkit-details-marker {
  display: none;
}
.page-about .about-cred__label {
  font-size: 1rem;
  font-weight: 600;
  color: var(--c-white);
}
.page-about .about-cred__hint {
  flex: 0 0 auto;
  font-family: var(--font-data);
  font-size: .74rem;
  letter-spacing: .14em;
  color: var(--c-rock);
  transition: color var(--t-fast) var(--ease);
}
.page-about .about-cred__item-inner[open] .about-cred__hint,
.page-about .about-cred__summary:hover .about-cred__hint {
  color: var(--c-cyan);
}
.page-about .about-cred__text {
  margin: 0;
  padding: 0 0 clamp(18px, 2.4vw, 24px);
  max-width: 62ch;
  font-size: .92rem;
  line-height: 1.85;
  color: var(--ab-sub);
}
.page-about .about-cred__link {
  color: var(--c-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.page-about .about-cred__link:hover {
  color: var(--c-white);
}

/* ---------- 内容伙伴 ---------- */
.page-about .about-partners {
  display: grid;
  gap: clamp(14px, 2vw, 20px);
  margin-bottom: clamp(20px, 3vw, 30px);
}
.page-about .about-partner {
  padding: clamp(18px, 2.4vw, 26px);
  border: 1px solid var(--ab-cream-line);
  border-radius: var(--r-md);
  background: rgba(255, 255, 255, .5);
}
.page-about .about-partner__v {
  margin: 0 0 8px;
  font-family: var(--font-data);
  font-size: clamp(1.5rem, 3.2vw, 2.1rem);
  font-weight: 700;
  line-height: 1;
  color: #8C5A38;
}
.page-about .about-partner__h {
  margin: 0 0 10px;
  font-size: 1.02rem;
}
.page-about .about-partner__p {
  margin: 0;
  font-size: .9rem;
  line-height: 1.8;
  color: var(--ab-cream-sub);
}
.page-about .about-open {
  padding: clamp(18px, 2.6vw, 26px);
  border-left: 3px solid var(--c-clay);
  background: rgba(18, 22, 31, .05);
  border-radius: 0 var(--r-md) var(--r-md) 0;
}
.page-about .about-open__h {
  margin: 0 0 10px;
  font-size: 1.02rem;
}
.page-about .about-open__p {
  margin: 0;
  max-width: 62ch;
  font-size: .92rem;
  line-height: 1.85;
  color: var(--ab-cream-sub);
}
.page-about .about-open__link {
  color: #8C5A38;
  text-decoration: underline;
  text-underline-offset: 3px;
}
.page-about .about-open__link:hover {
  color: var(--ab-cream-ink);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  padding: clamp(52px, 8vw, 96px) 0;
  border-top: 1px solid var(--line-soft);
  background:
    radial-gradient(120% 100% at 10% 0%, rgba(124, 92, 255, .2), transparent 62%),
    radial-gradient(90% 90% at 92% 100%, rgba(56, 225, 225, .13), transparent 60%),
    var(--c-deep);
}
.page-about .about-cta__title {
  margin: 0 0 clamp(12px, 2vw, 18px);
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3.6vw, 2.4rem);
  line-height: 1.2;
  letter-spacing: -.01em;
  color: var(--c-white);
}
.page-about .about-cta__p {
  margin: 0 0 clamp(22px, 3vw, 32px);
  max-width: 60ch;
  font-size: clamp(1rem, 1.5vw, 1.06rem);
  line-height: 1.85;
  color: var(--ab-sub);
}
.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-archive {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 820px) {
  .page-about .about-flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-team__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-partners {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-section__grid {
    grid-template-columns: minmax(110px, 1fr) minmax(0, 3.6fr);
    gap: clamp(28px, 5vw, 72px);
  }
  .page-about .about-section__rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    position: sticky;
    top: 104px;
    align-self: start;
  }
  .page-about .about-section__rail::after {
    display: block;
    width: 1px;
    height: clamp(84px, 12vw, 148px);
    margin-top: 6px;
    background: linear-gradient(180deg, var(--line-violet), transparent);
  }
  .page-about .about-section--cream .about-section__rail::after {
    background: linear-gradient(180deg, rgba(192, 132, 100, .75), transparent);
  }
  .page-about .about-timeline {
    margin-top: clamp(8px, 1.4vw, 14px);
  }
}

@media (max-width: 480px) {
  .page-about .about-cred__summary {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }
}
<<<END>>>