.page-about {
  --about-line: rgba(211, 217, 222, 0.16);
  --about-line-ink: rgba(6, 20, 35, 0.14);
  --about-ink-soft: rgba(6, 20, 35, 0.76);
  --about-tl-pad: 1.75rem;
}

/* ---------- 通用文本 ---------- */
.page-about .about-text {
  margin: 0;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.78;
  color: var(--rock-400);
  max-width: 62ch;
}
.page-about .band-light .about-text {
  color: var(--about-ink-soft);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(1.25rem, 4vw, 2.75rem) clamp(2.75rem, 7vw, 5.5rem);
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(115% 78% at 88% 6%, rgba(34, 224, 214, 0.18), transparent 62%),
    radial-gradient(85% 65% at 4% 96%, rgba(167, 123, 255, 0.16), transparent 66%);
}
.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
}
.page-about .about-hero__copy {
  display: grid;
  gap: 1.1rem;
  align-content: start;
}
.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 0.35rem;
}
.page-about .about-hero__facts {
  list-style: none;
  margin: 0.75rem 0 0;
  padding: 1.15rem 0 0;
  border-top: var(--hairline);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(96px, 1fr));
  gap: 1rem 1.25rem;
}
.page-about .about-hero__facts b {
  display: block;
  font-size: clamp(1.3rem, 3.6vw, 1.85rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--cyan-200);
  line-height: 1.1;
}
.page-about .about-hero__facts span {
  display: block;
  margin-top: 0.3rem;
  font-size: 13px;
  font-weight: 300;
  color: var(--rock-400);
}
.page-about .about-hero__figure {
  margin: 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid rgba(34, 224, 214, 0.26);
  background: linear-gradient(155deg, rgba(18, 49, 79, 0.92), rgba(6, 20, 35, 0.55));
}
.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
    gap: clamp(2rem, 4vw, 4.5rem);
  }
  .page-about .about-hero__figure {
    margin-bottom: 0.5rem;
  }
}

/* ---------- 01 只做一件事 ---------- */
.page-about .about-focus {
  position: relative;
  border-top: var(--hairline);
  background:
    linear-gradient(180deg, rgba(11, 34, 57, 0.55), rgba(6, 20, 35, 0.9));
}
.page-about .about-focus::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.35;
  background-image: repeating-linear-gradient(
    0deg,
    rgba(233, 223, 207, 0.05) 0 1px,
    transparent 1px 4px
  );
}
.page-about .about-focus__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
}
.page-about .about-focus__panel {
  border-radius: var(--r-lg);
  border: 1px solid rgba(34, 224, 214, 0.28);
  background: rgba(18, 49, 79, 0.55);
  padding: clamp(1.25rem, 3vw, 2rem);
  align-self: start;
}
.page-about .about-focus__big {
  margin: 0;
  font-size: clamp(4rem, 15vw, 8.5rem);
  font-weight: 800;
  line-height: 0.88;
  letter-spacing: -0.04em;
  font-variant-numeric: tabular-nums;
  color: var(--cream-100);
}
.page-about .about-focus__big span {
  font-size: 0.42em;
  color: var(--cyan-500);
  margin-left: 0.06em;
}
.page-about .about-focus__cap {
  margin: 0.65rem 0 0;
  font-size: clamp(14px, 1.8vw, 16px);
  font-weight: 500;
  color: var(--rock-400);
}
.page-about .about-focus__split {
  list-style: none;
  margin: 1.25rem 0 0;
  padding: 1rem 0 0;
  border-top: var(--hairline);
  display: grid;
  gap: 0.55rem;
}
.page-about .about-focus__split li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  font-size: 14px;
  color: var(--rock-400);
}
.page-about .about-focus__split b {
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--cream-100);
}
.page-about .about-focus__copy {
  display: grid;
  gap: 1rem;
  align-content: start;
}

@media (min-width: 880px) {
  .page-about .about-focus__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: clamp(2rem, 5vw, 5rem);
    align-items: start;
  }
}

/* ---------- 02 谁在用 ---------- */
.page-about .about-users__head {
  display: grid;
  gap: 0.9rem;
  max-width: 72ch;
}
.page-about .about-users__grid {
  margin-top: clamp(1.75rem, 4vw, 2.75rem);
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
}
.page-about .about-users__figure {
  margin: 0;
  border-radius: var(--r-md);
  overflow: hidden;
  border-bottom: 2px solid var(--clay-600);
}
.page-about .about-users__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .about-users__figure .figure__cap {
  padding-top: 0.6rem;
  font-size: 13px;
  color: var(--about-ink-soft);
}
.page-about .about-users__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--about-line-ink);
}
.page-about .about-user {
  display: grid;
  gap: 0.45rem;
  padding: 1.15rem 0;
  border-bottom: 1px solid var(--about-line-ink);
}
.page-about .about-user__meta {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--clay-600);
}
.page-about .about-user__fig {
  font-size: clamp(1.15rem, 3vw, 1.45rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--deep-900);
}
.page-about .about-user__title {
  margin: 0;
  font-size: clamp(1.05rem, 2.4vw, 1.25rem);
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--deep-900);
}

@media (min-width: 900px) {
  .page-about .about-users__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }
}

/* ---------- 03 时间线 ---------- */
.page-about .about-timeline {
  border-top: 1px solid var(--clay-600);
}
.page-about .about-timeline__head {
  display: grid;
  gap: 0.9rem;
  max-width: 72ch;
}
.page-about .about-timeline__figure {
  margin: clamp(1.5rem, 3.5vw, 2.25rem) 0 0;
  border-radius: var(--r-md);
  overflow: hidden;
  background: rgba(18, 49, 79, 0.06);
  border: 1px solid rgba(6, 20, 35, 0.1);
}
.page-about .about-timeline__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: contain;
}
.page-about .about-timeline__figure .figure__cap {
  padding: 0.55rem 0.9rem 0.7rem;
  font-size: 13px;
  border-bottom: 1px solid var(--clay-600);
  color: var(--about-ink-soft);
}
.page-about .about-years {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: clamp(1.5rem, 3.5vw, 2.25rem) 0 clamp(1rem, 2.5vw, 1.5rem);
}
.page-about .about-years a {
  display: inline-flex;
  align-items: center;
  padding: 0.42rem 0.9rem;
  border-radius: 999px;
  border: 1px solid rgba(6, 20, 35, 0.22);
  font-size: 14px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--deep-900);
  text-decoration: none;
  transition: background-color 180ms var(--ease), color 180ms var(--ease),
    border-color 180ms var(--ease);
}
.page-about .about-years a:hover,
.page-about .about-years a:focus-visible {
  background: var(--deep-900);
  border-color: var(--deep-900);
  color: var(--cream-100);
}

.page-about .tl {
  list-style: none;
  margin: 0;
  padding: 0 0 0 var(--about-tl-pad);
  position: relative;
}
.page-about .tl::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 1.4rem;
  bottom: 1.4rem;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan-500), rgba(34, 224, 214, 0.12));
}
.page-about .tl__item {
  position: relative;
}
.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: calc(-1 * var(--about-tl-pad) + 1px);
  top: 1.35rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--cream-100);
  border: 2px solid var(--cyan-500);
  box-sizing: border-box;
}
.page-about .tl__det {
  border-bottom: 1px solid var(--about-line-ink);
}
.page-about .tl__sum {
  list-style: none;
  cursor: pointer;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.35rem 0.9rem;
  padding: 1rem 0 1rem 0.15rem;
}
.page-about .tl__sum::-webkit-details-marker {
  display: none;
}
.page-about .tl__sum:focus-visible {
  outline: 2px solid var(--cyan-500);
  outline-offset: 3px;
}
.page-about .tl__year {
  font-size: clamp(1.6rem, 4.6vw, 2.35rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--deep-900);
}
.page-about .tl__title {
  font-size: clamp(0.95rem, 2vw, 1.1rem);
  font-weight: 700;
  color: var(--deep-900);
}
.page-about .tl__chev {
  margin-left: auto;
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--clay-600);
  border-bottom: 2px solid var(--clay-600);
  transform: rotate(45deg);
  transition: transform 200ms var(--ease);
  flex: none;
}
.page-about .tl__det[open] .tl__chev {
  transform: rotate(-135deg);
}
.page-about .tl__body {
  display: grid;
  gap: 0.75rem;
  padding: 0 0 1.35rem;
  max-width: 62ch;
}
.page-about .tl__body .about-text {
  max-width: none;
}
.page-about .tl__gain {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  padding: 0.6rem 0.85rem;
  border-left: 3px solid var(--cyan-500);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  background: rgba(34, 224, 214, 0.18);
  color: var(--deep-900);
}

/* ---------- 04 谁在维护 ---------- */
.page-about .about-team__head {
  display: grid;
  gap: 0.9rem;
  max-width: 72ch;
}
.page-about .team-grid {
  list-style: none;
  margin: clamp(1.5rem, 3.5vw, 2.25rem) 0 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}
.page-about .team-card {
  display: grid;
  gap: 0.55rem;
  align-content: start;
  padding: clamp(1.05rem, 2.4vw, 1.4rem);
  border-radius: var(--r-md);
  border: 1px solid var(--about-line-ink);
  background: rgba(18, 49, 79, 0.05);
  transition: border-color 180ms var(--ease), background-color 180ms var(--ease);
}
.page-about .team-card:hover {
  border-color: rgba(34, 224, 214, 0.7);
  background: rgba(34, 224, 214, 0.07);
}
.page-about .team-card__tag {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.16em;
  color: var(--clay-600);
}
.page-about .team-card__title {
  margin: 0;
  font-size: clamp(1rem, 2.2vw, 1.15rem);
  font-weight: 700;
  line-height: 1.45;
  color: var(--deep-900);
}
.page-about .team-card .about-text {
  font-size: 15px;
  max-width: none;
}
.page-about .team-roles {
  list-style: none;
  margin: clamp(1.25rem, 3vw, 1.75rem) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.page-about .team-roles li {
  padding: 0.42rem 0.85rem;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  color: var(--deep-900);
  background: rgba(167, 123, 255, 0.14);
  border: 1px solid rgba(167, 123, 255, 0.42);
}

@media (min-width: 720px) {
  .page-about .team-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 05 伙伴 ---------- */
.page-about .about-partners {
  border-top: var(--hairline);
  background: linear-gradient(180deg, rgba(6, 20, 35, 0.95), rgba(11, 34, 57, 0.85));
}
.page-about .about-partners__grid {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
}
.page-about .about-partners__copy {
  display: grid;
  gap: 1rem;
  align-content: start;
}
.page-about .about-partners__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  border: 1px solid var(--about-line);
  border-radius: var(--r-md);
  overflow: hidden;
  align-self: start;
}
.page-about .about-partners__list li {
  display: grid;
  gap: 0.3rem;
  align-content: start;
  padding: 1.1rem 1rem;
  background: var(--deep-900);
}
.page-about .about-partners__list b {
  font-size: clamp(1.15rem, 3vw, 1.5rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  font-variant-numeric: tabular-nums;
  color: var(--cyan-200);
  line-height: 1.15;
}
.page-about .about-partners__list span {
  font-size: 13px;
  font-weight: 300;
  color: var(--rock-400);
}

@media (min-width: 900px) {
  .page-about .about-partners__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }
}

/* ---------- 收束 ---------- */
.page-about .about-cta {
  position: relative;
  padding-block: clamp(2.75rem, 7vw, 5rem);
  border-top: 1px solid rgba(201, 106, 69, 0.5);
  background:
    radial-gradient(80% 100% at 0% 0%, rgba(255, 138, 61, 0.12), transparent 60%),
    linear-gradient(180deg, rgba(11, 34, 57, 0.6), rgba(6, 20, 35, 1));
}
.page-about .about-cta .h-section {
  margin-top: 0.75rem;
}
.page-about .about-cta .about-text {
  margin-top: 0.95rem;
}
.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}
.page-about .about-cta__index {
  list-style: none;
  margin: clamp(1.75rem, 4vw, 2.5rem) 0 0;
  padding: 1.25rem 0 0;
  border-top: var(--hairline);
  display: grid;
  gap: 0.85rem;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
}

/* ---------- 窄屏收敛 ---------- */
@media (max-width: 520px) {
  .page-about .about-partners__list {
    grid-template-columns: minmax(0, 1fr);
  }
  .page-about .about-hero__actions .btn,
  .page-about .about-cta__actions .btn {
    width: 100%;
    justify-content: center;
  }
}
<<<END>>>