.page-about {
  --about-side: 260px;
  --about-line: 1px solid var(--c-steel);
  --about-paper-shadow: 8px 8px 0 rgba(19, 28, 51, .9), 14px 14px 0 rgba(240, 138, 36, .16);
  --about-step: 36px;
  display: block;
  background:
    radial-gradient(90% 45% at 88% -6%, rgba(240, 138, 36, .12), transparent 62%),
    radial-gradient(70% 42% at 4% 22%, rgba(139, 92, 246, .1), transparent 60%),
    linear-gradient(180deg, var(--c-space) 0%, var(--c-space) 62%, var(--c-night) 100%);
  color: var(--c-mist);
  overflow-x: clip;
  padding-bottom: clamp(40px, 6vw, 80px);
}

.page-about .breadcrumb {
  padding-top: clamp(14px, 2.2vw, 26px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(20px, 3vw, 40px) 0 clamp(32px, 5vw, 60px);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 52px);
  align-items: start;
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(28px, 4.8vw, 52px);
  line-height: 1.2;
  letter-spacing: .01em;
  color: var(--c-mist);
}

.page-about .about-hero__hl {
  display: block;
  color: var(--c-orange);
  text-shadow: var(--glow-orange);
}

.page-about .about-hero__lede {
  margin: 20px 0 0;
  max-width: 62ch;
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.9;
  color: var(--c-mist);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 18px;
  margin: 28px 0 0;
  padding-top: 22px;
  border-top: var(--about-line);
}

.page-about .about-stat__label {
  margin: 0 0 6px;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--c-mist);
  opacity: .62;
}

.page-about .about-stat__value {
  margin: 0;
  font-family: var(--font-data);
  font-size: clamp(19px, 2.4vw, 26px);
  letter-spacing: .04em;
  color: var(--c-orange);
}

.page-about .about-hero__media {
  margin: 0;
  position: relative;
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1000 / 1400;
  object-fit: cover;
  border: 1px solid var(--c-steel);
  box-shadow: var(--about-paper-shadow);
}

.page-about .about-hero__caption {
  margin-top: 16px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--c-cyan);
}

/* ---------- 锚点条 ---------- */
.page-about .about-jump {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 12px;
  margin-bottom: clamp(30px, 5vw, 64px);
  padding-top: 16px;
  border-top: var(--about-line);
}

.page-about .about-jump__cap {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--c-orange);
  margin-right: 4px;
}

.page-about .about-jump__link {
  padding: 5px 12px;
  border: 1px solid var(--c-steel);
  border-radius: var(--r-sm);
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--c-mist);
  text-decoration: none;
  transition: color .2s var(--ease), background-color .2s var(--ease), border-color .2s var(--ease);
}

.page-about .about-jump__link:hover,
.page-about .about-jump__link:focus-visible {
  color: var(--c-ink);
  background: var(--c-orange);
  border-color: var(--c-orange);
}

/* ---------- 编者按 ---------- */
.page-about .about-editorial {
  padding-bottom: clamp(44px, 6.5vw, 84px);
}

.page-about .about-note {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 40px);
  padding: clamp(28px, 3.8vw, 50px);
  background: var(--c-paper);
  color: var(--c-ink);
  border: 1px solid var(--c-ink);
  box-shadow: var(--about-paper-shadow);
}

.page-about .about-note__stamp {
  position: absolute;
  top: -13px;
  left: clamp(16px, 3vw, 40px);
  padding: 5px 12px;
  background: var(--c-ink);
  color: var(--c-paper);
  border-radius: var(--r-sm);
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: .2em;
}

.page-about .about-note__title {
  grid-column: 1 / -1;
  margin: 0;
  font-family: var(--font-editorial);
  font-weight: 600;
  font-size: clamp(22px, 3vw, 32px);
  line-height: 1.4;
  color: var(--c-ink);
}

.page-about .about-note__body p {
  margin: 0 0 1.1em;
  font-size: 16px;
  line-height: 1.9;
  color: var(--c-ink);
}

.page-about .about-note__body p:last-child {
  margin-bottom: 0;
}

.page-about .about-note__side {
  align-self: start;
  padding-left: 16px;
  border-left: 3px solid var(--c-orange);
}

.page-about .about-note__sidetitle {
  margin: 0 0 8px;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--c-ink);
}

.page-about .about-note__side p:last-child {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--c-ink);
  opacity: .84;
}

/* ---------- 版本阶梯 ---------- */
.page-about .about-rise {
  padding-bottom: clamp(48px, 7vw, 92px);
}

.page-about .about-rise__head {
  max-width: 66ch;
}

.page-about .about-rise__title {
  margin: 12px 0 0;
  font-family: var(--font-editorial);
  font-weight: 600;
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1.35;
  color: var(--c-mist);
}

.page-about .about-rise__lede {
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.9;
  color: var(--c-mist);
  opacity: .82;
}

.page-about .about-rise__track {
  margin-top: clamp(28px, 4.5vw, 54px);
}

.page-about .rise-node {
  position: relative;
  margin-left: 0;
  padding: 2px 0 2px 22px;
  border-left: 1px solid var(--c-steel);
  transition: border-color .3s var(--ease);
}

.page-about .rise-node.is-visible {
  border-left-color: var(--c-orange);
}

.page-about .rise-node::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 16px;
  width: 13px;
  height: 13px;
  box-sizing: border-box;
  border-radius: 50%;
  background: var(--c-space);
  border: 2px solid var(--c-steel);
  transition: border-color .3s var(--ease), background-color .3s var(--ease), box-shadow .3s var(--ease);
}

.page-about .rise-node.is-visible::before {
  background: var(--c-orange);
  border-color: var(--c-orange-hi);
  box-shadow: var(--glow-orange);
}

.page-about .rise-node__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 12px;
  padding: 8px 0;
  cursor: pointer;
  list-style: none;
}

.page-about .rise-node__head::-webkit-details-marker {
  display: none;
}

.page-about .rise-node__ver {
  font-family: var(--font-data);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--c-orange);
}

.page-about .rise-node__when {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--c-mist);
  opacity: .58;
}

.page-about .rise-node__name {
  flex: 1 1 200px;
  font-family: var(--font-editorial);
  font-size: clamp(16px, 1.8vw, 19px);
  line-height: 1.5;
  color: var(--c-mist);
}

.page-about .rise-node__mark {
  align-self: center;
  width: 10px;
  height: 10px;
  border: 1px solid var(--c-steel);
  transform: rotate(45deg);
  transition: transform .24s var(--ease), background-color .24s var(--ease), border-color .24s var(--ease);
}

.page-about .rise-node[open] .rise-node__mark {
  background: var(--c-orange);
  border-color: var(--c-orange);
  transform: rotate(135deg);
}

.page-about .rise-node__body {
  max-width: 62ch;
  padding: 2px 0 18px;
}

.page-about .rise-node__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.9;
  color: var(--c-mist);
  opacity: .84;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding-bottom: clamp(48px, 7vw, 92px);
}

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 52px);
  align-items: start;
}

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

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1200 / 800;
  object-fit: cover;
  border: 1px solid var(--c-steel);
}

.page-about .about-team__figure figcaption {
  margin-top: 12px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .08em;
  line-height: 1.7;
  color: var(--c-cyan);
}

.page-about .about-team__title {
  margin: 12px 0 0;
  font-family: var(--font-editorial);
  font-weight: 600;
  font-size: clamp(24px, 3.2vw, 36px);
  line-height: 1.35;
  color: var(--c-mist);
}

.page-about .about-team__lede {
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.9;
  color: var(--c-mist);
  opacity: .84;
}

.page-about .team-list {
  list-style: none;
  margin: clamp(24px, 3vw, 36px) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .team-card {
  padding: 18px 20px;
  background: var(--c-night);
  border: 1px solid var(--c-steel);
  border-left: 3px solid var(--c-steel);
  border-radius: var(--r-md);
  transition: transform .24s var(--ease), border-color .24s var(--ease), box-shadow .24s var(--ease);
}

.page-about .team-card:hover {
  transform: translateY(-4px);
  border-left-color: var(--c-orange);
  box-shadow: 0 12px 0 -8px rgba(240, 138, 36, .45);
}

.page-about .team-card__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  letter-spacing: .04em;
  color: var(--c-mist);
}

.page-about .team-card__text {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--c-mist);
  opacity: .82;
}

.page-about .team-card__freq {
  margin: 14px 0 0;
  padding-top: 10px;
  border-top: 1px solid var(--c-steel);
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--c-cyan);
}

.page-about .team-card__freq span {
  display: inline-block;
  margin-right: 10px;
  color: var(--c-mist);
  opacity: .5;
}

/* ---------- 节奏 ---------- */
.page-about .about-cadence {
  padding-bottom: clamp(48px, 7vw, 92px);
}

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

.page-about .about-cadence__title {
  margin: 12px 0 0;
  font-family: var(--font-editorial);
  font-weight: 600;
  font-size: clamp(24px, 3.2vw, 36px);
  line-height: 1.35;
  color: var(--c-mist);
}

.page-about .about-cadence__lede {
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.9;
  color: var(--c-mist);
  opacity: .82;
}

.page-about .cadence-list {
  list-style: none;
  margin: clamp(26px, 4vw, 46px) 0 0;
  padding: 0;
  border-top: var(--about-line);
}

.page-about .cadence-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 20px 0;
  border-bottom: var(--about-line);
}

.page-about .cadence-row__beat {
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: .18em;
  color: var(--c-orange);
}

.page-about .cadence-row__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  letter-spacing: .03em;
  color: var(--c-mist);
}

.page-about .cadence-row__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--c-mist);
  opacity: .82;
}

/* ---------- 运营与备案 ---------- */
.page-about .about-ground {
  padding-bottom: clamp(48px, 7vw, 92px);
}

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

.page-about .about-ground__title {
  margin: 12px 0 0;
  font-family: var(--font-editorial);
  font-weight: 600;
  font-size: clamp(24px, 3.2vw, 36px);
  line-height: 1.35;
  color: var(--c-mist);
}

.page-about .about-ground__lede {
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.9;
  color: var(--c-mist);
  opacity: .82;
}

.page-about .ground-bar {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-top: clamp(22px, 3vw, 34px);
}

.page-about .ground-item {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  align-items: baseline;
  padding: 14px 18px;
  border: 1px solid var(--c-steel);
  border-radius: var(--r-md);
  background: linear-gradient(100deg, rgba(19, 28, 51, .92), rgba(10, 17, 34, .45));
}

.page-about .ground-item__key {
  flex: none;
  min-width: 76px;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--c-orange);
}

.page-about .ground-item__val {
  flex: 1 1 200px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-mist);
}

.page-about .about-ground__foot {
  margin: 20px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--c-mist);
  opacity: .72;
}

.page-about .about-ground__foot a {
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 224, 210, .45);
}

.page-about .about-ground__foot a:hover,
.page-about .about-ground__foot a:focus-visible {
  color: var(--c-orange-hi);
  border-bottom-color: var(--c-orange-hi);
}

/* ---------- 收尾 ---------- */
.page-about .about-close {
  padding: clamp(38px, 6vw, 72px) 0 clamp(20px, 3vw, 36px);
  border-top: var(--about-line);
}

.page-about .about-close__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
}

.page-about .about-close__title {
  margin: 12px 0 0;
  font-family: var(--font-editorial);
  font-weight: 600;
  font-size: clamp(24px, 3.2vw, 36px);
  line-height: 1.35;
  color: var(--c-mist);
}

.page-about .about-close__text {
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.9;
  color: var(--c-mist);
  opacity: .84;
}

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

.page-about .about-close__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1600 / 900;
  object-fit: cover;
  border: 1px solid var(--c-steel);
  border-radius: var(--r-md);
  box-shadow: 0 0 0 1px rgba(53, 224, 210, .16), 0 26px 60px -36px rgba(53, 224, 210, .55);
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-about .cadence-row {
    grid-template-columns: 110px minmax(180px, 250px) minmax(0, 1fr);
    align-items: baseline;
    gap: 24px;
  }

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

@media (min-width: 860px) {
  .page-about .rise-node {
    margin-left: calc(var(--step, 0) * var(--about-step));
  }

  .page-about .rise-node__head {
    flex-wrap: nowrap;
  }
}

@media (min-width: 900px) {
  .page-about .about-note {
    grid-template-columns: minmax(0, 1.75fr) minmax(200px, 1fr);
  }

  .page-about .about-close__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
  }
}

@media (min-width: 920px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1fr) minmax(280px, 400px);
  }
}

@media (min-width: 1000px) {
  .page-about .cadence-row:nth-child(2) {
    padding-left: 20px;
  }

  .page-about .cadence-row:nth-child(3) {
    padding-left: 40px;
  }

  .page-about .cadence-row:nth-child(4) {
    padding-left: 60px;
  }

  .page-about .cadence-row:nth-child(5) {
    padding-left: 80px;
  }
}

@media (min-width: 1100px) {
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 400px) minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-card,
  .page-about .rise-node,
  .page-about .rise-node::before,
  .page-about .rise-node__mark,
  .page-about .about-jump__link {
    transition: none;
  }

  .page-about .team-card:hover {
    transform: none;
  }
}

.page-about {
  --step: 1rem;
}