.page-about {
  --about-lead: clamp(15px, 1.2vw, 17px);
  --about-radius: 2px;
  background: var(--ink);
  color: var(--mist);
  overflow-x: clip;
}

.page-about .breadcrumb {
  padding-block: clamp(14px, 2vw, 22px) 0;
}

.page-about .about-inline-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 184, 198, .45);
  transition: color .18s ease, border-color .18s ease;
}

.page-about .about-inline-link:hover,
.page-about .about-inline-link:focus-visible {
  color: var(--sand);
  border-color: var(--sand);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-block: clamp(18px, 3vw, 32px) clamp(36px, 6vw, 80px);
}

.page-about .about-hero__frame {
  position: relative;
  isolation: isolate;
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  padding: clamp(20px, 4vw, 52px);
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  background:
    linear-gradient(155deg, rgba(47, 184, 198, .13), rgba(11, 27, 43, 0) 58%),
    linear-gradient(0deg, rgba(20, 24, 29, .55), rgba(20, 24, 29, .55));
  overflow: hidden;
}

.page-about .about-hero__frame::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 9px;
  background-image: repeating-linear-gradient(90deg, var(--sand) 0 1px, transparent 1px 26px);
  opacity: .45;
  pointer-events: none;
}

.page-about .about-hero__frame::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
  opacity: .55;
  pointer-events: none;
}

.page-about .about-hero__contour {
  position: absolute;
  inset: auto -6% -12% -6%;
  width: 112%;
  height: 62%;
  z-index: -1;
  opacity: .85;
  pointer-events: none;
}

.page-about .about-hero__text {
  display: flex;
  flex-direction: column;
  gap: clamp(14px, 2vw, 22px);
  min-width: 0;
}

.page-about .about-hero__title {
  font-size: clamp(30px, 6.4vw, 64px);
  font-weight: 300;
  line-height: 1.16;
  letter-spacing: .04em;
  margin: 0;
  color: var(--mist);
}

.page-about .about-hero__lede {
  max-width: 56ch;
  font-size: var(--about-lead);
  line-height: 1.85;
  color: var(--mist);
  opacity: .86;
  margin: 0;
}

.page-about .about-hero__index {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-top: 4px;
}

.page-about .about-hero__index .tag {
  text-decoration: none;
  transition: transform .18s ease, border-color .18s ease, color .18s ease;
}

.page-about .about-hero__index .tag:hover,
.page-about .about-hero__index .tag:focus-visible {
  transform: translateY(-2px);
  border-color: var(--sand);
  color: var(--mist);
}

.page-about .about-hero__figure {
  margin: 0;
  min-width: 0;
}

.page-about .about-hero__figure .figure__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 通用区块头 ---------- */
.page-about .about-sec-no {
  font-size: 12px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--sand);
  margin: 0 0 10px;
}

.page-about .about-sec-head {
  max-width: 62ch;
  margin-bottom: clamp(22px, 3.4vw, 40px);
}

.page-about .about-sec-head .h2 {
  margin: 0 0 12px;
  font-weight: 300;
  letter-spacing: .03em;
  line-height: 1.28;
}

.page-about .about-sec-head__lede {
  margin: 0;
  color: var(--slate);
  font-size: var(--about-lead);
  line-height: 1.8;
}

.page-about .h2,
.page-about .h3 {
  color: var(--mist);
}

/* ---------- 起点 ---------- */
.page-about .about-origin__grid {
  display: grid;
  gap: clamp(22px, 3vw, 40px);
}

.page-about .about-origin__title {
  margin: 0 0 16px;
  font-weight: 300;
  letter-spacing: .03em;
}

.page-about .about-origin__main p {
  font-size: var(--about-lead);
  line-height: 1.9;
  color: var(--mist);
  opacity: .84;
  margin: 0 0 14px;
  max-width: 62ch;
}

.page-about .about-origin__aside {
  padding: clamp(18px, 2.6vw, 26px);
  align-self: start;
}

.page-about .about-origin__aside-label {
  color: var(--sand);
}

.page-about .about-facts {
  margin: 12px 0 0;
  display: grid;
  gap: 0;
}

.page-about .about-facts__row {
  display: grid;
  grid-template-columns: minmax(72px, 88px) minmax(0, 1fr);
  gap: 12px;
  padding: 10px 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-facts__row:first-child {
  border-top: 0;
}

.page-about .about-facts__key {
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--slate);
}

.page-about .about-facts__val {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .about-facts__val.num {
  color: var(--cyan);
  font-size: 15px;
}

/* ---------- 发展轴 ---------- */
.page-about .about-timeline__grid {
  display: grid;
  gap: clamp(28px, 4vw, 44px);
}

.page-about .tl {
  position: relative;
  padding-left: 26px;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan), rgba(47, 184, 198, .08));
}

.page-about .tl-node {
  position: relative;
  padding: 12px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .tl-node::before {
  content: "";
  position: absolute;
  left: -25px;
  top: 24px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--sand);
  box-shadow: 0 0 0 4px rgba(216, 178, 106, .12);
  transition: background .2s ease, box-shadow .2s ease;
}

.page-about .tl-node[open]::before {
  background: var(--cyan);
  box-shadow: 0 0 0 5px rgba(47, 184, 198, .16);
}

.page-about .tl-node__summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 14px;
  cursor: pointer;
  list-style: none;
  padding: 4px 0;
  border-radius: var(--about-radius);
}

.page-about .tl-node__summary::-webkit-details-marker {
  display: none;
}

.page-about .tl-node__summary:hover .tl-node__label,
.page-about .tl-node__summary:focus-visible .tl-node__label {
  color: var(--cyan);
}

.page-about .tl-node__year {
  font-size: clamp(20px, 2.6vw, 26px);
  color: var(--sand);
  letter-spacing: .04em;
}

.page-about .tl-node__label {
  font-size: 15px;
  letter-spacing: .05em;
  color: var(--mist);
  transition: color .18s ease;
}

.page-about .tl-node__body {
  padding: 4px 0 8px 0;
}

.page-about .tl-node__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--slate);
  max-width: 56ch;
}

.page-about .about-timeline__aside {
  display: grid;
  gap: 18px;
  align-content: start;
}

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

.page-about .about-timeline__figure .figure__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-timeline__note {
  padding: 18px 20px;
}

.page-about .about-timeline__note .label {
  color: var(--cyan);
}

.page-about .about-timeline__note-text {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--mist);
  opacity: .82;
}

/* ---------- 团队主题带 ---------- */
.page-about .team-band {
  background: var(--char);
  border-block: 1px solid var(--line);
  padding-block: clamp(34px, 5vw, 68px);
}

.page-about .about-sec-head--band {
  max-width: 64ch;
}

.page-about .team-band__grid {
  display: grid;
  gap: clamp(22px, 3vw, 36px);
}

.page-about .team-band__cards {
  display: grid;
  gap: 14px;
}

.page-about .role-card {
  position: relative;
  padding: 20px 20px 18px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--sand);
  border-radius: var(--about-radius);
  background: rgba(11, 27, 43, .55);
  transition: transform .2s ease, border-color .2s ease, background .2s ease;
}

.page-about .role-card:hover,
.page-about .role-card:focus-within {
  transform: translateY(-2px);
  border-color: var(--cyan);
  background: rgba(47, 184, 198, .08);
}

.page-about .role-card__no {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--cyan);
}

.page-about .role-card__title {
  margin: 0 0 10px;
  font-size: 20px;
  font-weight: 400;
  letter-spacing: .06em;
  color: var(--mist);
}

.page-about .role-card__desc {
  margin: 0 0 14px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--slate);
}

.page-about .role-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
}

.page-about .team-band__figure {
  margin: 0;
}

.page-about .team-band__figure .figure__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 场景 ---------- */
.page-about .scene-list {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.page-about .scene-card {
  display: grid;
  gap: 10px;
  padding: clamp(20px, 3vw, 30px) 0;
  border-bottom: 1px solid var(--line-soft);
  transition: background .2s ease;
}

.page-about .scene-card:hover {
  background: rgba(47, 184, 198, .05);
}

.page-about .scene-card__no {
  margin: 0;
  font-size: 13px;
  letter-spacing: .18em;
  color: var(--sand);
}

.page-about .scene-card__title {
  margin: 0 0 8px;
  font-size: 19px;
  font-weight: 400;
  letter-spacing: .03em;
  color: var(--mist);
}

.page-about .scene-card__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.88;
  color: var(--slate);
  max-width: 68ch;
}

.page-about .scene-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
}

/* ---------- 更新节奏 ---------- */
.page-about .about-rhythm__panel {
  padding: clamp(22px, 4vw, 48px);
}

.page-about .about-sec-head--inside {
  max-width: 58ch;
}

.page-about .cadence {
  display: grid;
  border-top: 1px solid var(--line);
}

.page-about .cadence__row {
  display: grid;
  gap: 8px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .cadence__key {
  font-size: 15px;
  letter-spacing: .05em;
  color: var(--sand);
}

.page-about .cadence__val {
  font-size: 14px;
  line-height: 1.85;
  color: var(--mist);
  opacity: .82;
}

.page-about .cadence__tag {
  display: block;
}

.page-about .about-rhythm__foot {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--slate);
}

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

.page-about .why-item {
  padding: clamp(20px, 3vw, 30px);
  background: var(--ink);
  transition: background .2s ease;
}

.page-about .why-item:hover {
  background: rgba(47, 184, 198, .07);
}

.page-about .why-item__no {
  margin: 0 0 10px;
  font-size: 26px;
  letter-spacing: .06em;
  color: rgba(216, 178, 106, .55);
}

.page-about .why-item__title {
  margin: 0 0 10px;
  font-size: 18px;
  font-weight: 400;
  letter-spacing: .05em;
  color: var(--mist);
}

.page-about .why-item__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.88;
  color: var(--slate);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  margin-top: clamp(24px, 4vw, 44px);
  display: grid;
  gap: 20px;
  padding: clamp(22px, 4vw, 40px);
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  background:
    linear-gradient(120deg, rgba(47, 184, 198, .14), rgba(11, 27, 43, .1) 62%),
    rgba(20, 24, 29, .8);
}

.page-about .about-cta__title {
  margin: 0 0 10px;
  font-weight: 300;
  letter-spacing: .04em;
  color: var(--mist);
}

.page-about .about-cta__text p {
  margin: 0;
  font-size: 15px;
  line-height: 1.88;
  color: var(--mist);
  opacity: .84;
  max-width: 62ch;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-content: start;
}

/* ---------- 桌面 ---------- */
@media (min-width: 760px) {
  .page-about .team-band__cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
  }

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

  .page-about .scene-card {
    grid-template-columns: 64px minmax(0, 1fr) auto;
    align-items: start;
    gap: 18px;
  }

  .page-about .scene-card__meta {
    justify-content: flex-end;
    max-width: 200px;
  }

  .page-about .cadence__row {
    grid-template-columns: minmax(150px, 200px) minmax(0, 1fr) auto;
    align-items: baseline;
    gap: 20px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__frame {
    grid-template-columns: minmax(0, 1.32fr) minmax(0, 1fr);
    align-items: stretch;
  }

  .page-about .about-hero__text {
    justify-content: center;
  }

  .page-about .about-hero__figure {
    align-self: stretch;
    min-height: 380px;
  }

  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-timeline__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .team-band__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: stretch;
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .role-card,
  .page-about .tl-node__label,
  .page-about .about-inline-link,
  .page-about .about-hero__index .tag {
    transition: none;
  }

  .page-about .role-card:hover,
  .page-about .about-hero__index .tag:hover {
    transform: none;
  }
}
<<<END>>>