.page-about {
  background: var(--ink-900);
  color: var(--paper);
  overflow-x: clip;
}

.page-about .media-frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--r-l);
}

.page-about .media-frame img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumbs {
  padding-top: clamp(1rem, 3vw, 1.75rem);
}

.page-about .crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: .8rem;
  letter-spacing: .02em;
}

.page-about .crumbs a {
  color: var(--light-dim);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s ease, border-color .2s ease;
}

.page-about .crumbs a:hover,
.page-about .crumbs a:focus-visible {
  color: var(--neon);
  border-bottom-color: var(--neon);
}

.page-about .crumbs a[aria-current="page"] {
  color: var(--paper);
}

.page-about .crumbs__sep {
  color: var(--neon-deep);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  padding: clamp(1.4rem, 4vw, 2.6rem) 0 clamp(3rem, 7vw, 5.5rem);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -14% -24% auto 42%;
  height: clamp(240px, 42vw, 480px);
  z-index: -1;
  pointer-events: none;
  background: linear-gradient(135deg, rgba(53, 240, 200, .18), rgba(255, 92, 138, .10) 56%, transparent 80%);
  clip-path: polygon(18% 0, 100% 0, 100% 100%, 0 60%);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.75rem, 4vw, 3rem);
}

.page-about .about-hero__copy {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

.page-about .about-hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.05rem, 7.2vw, 4.3rem);
  line-height: 1.06;
  letter-spacing: -.02em;
  color: var(--paper);
  text-wrap: balance;
}

.page-about .about-hero h1::after {
  content: "";
  display: block;
  width: 96px;
  height: 4px;
  margin-top: 1.1rem;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--neon), transparent);
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 34em;
  font-size: clamp(1rem, 2.2vw, 1.08rem);
  line-height: 1.82;
  color: rgba(246, 238, 223, .82);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin: .9rem 0 0;
  background: var(--glass-line);
  border: 1px solid var(--glass-line);
  border-radius: var(--r-m);
  overflow: hidden;
}

.page-about .about-stat {
  padding: .9rem .75rem;
  background: rgba(10, 36, 56, .78);
}

.page-about .about-stat dt {
  font-size: .7rem;
  letter-spacing: .1em;
  color: var(--light-dim);
}

.page-about .about-stat dd {
  margin: .35rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 3.4vw, 1.85rem);
  letter-spacing: -.01em;
  color: var(--neon);
}

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

.page-about .about-hero__figure .media-frame {
  aspect-ratio: 5 / 6;
  border: 1px solid var(--glass-line);
  box-shadow: var(--dock-shadow);
}

.page-about .about-hero__cap {
  margin-top: .75rem;
  font-size: .72rem;
  letter-spacing: .1em;
  color: var(--light-dim);
}

/* ---------- 起点 ---------- */
.page-about .about-origin {
  padding: clamp(3rem, 8vw, 6rem) 0;
  background: linear-gradient(180deg, var(--ink-900), var(--ink-800));
}

.page-about .about-origin__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.6rem, 4vw, 3.4rem);
}

.page-about .about-origin__aside {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.page-about .about-origin__aside h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.65rem, 4.6vw, 2.6rem);
  line-height: 1.16;
  letter-spacing: -.02em;
  color: var(--paper);
  text-wrap: balance;
}

.page-about .about-origin__lede {
  margin: 0;
  max-width: 30em;
  line-height: 1.82;
  color: rgba(246, 238, 223, .76);
}

.page-about .about-origin__stamp {
  width: fit-content;
  margin: 0;
  padding-top: 1rem;
  font-size: .84rem;
  letter-spacing: .18em;
  color: var(--gold);
  border-top: 1px solid var(--glass-line);
}

.page-about .about-origin__body {
  display: grid;
  gap: 1.1rem;
}

.page-about .about-origin__note {
  padding: clamp(1.15rem, 3vw, 1.9rem);
  background: rgba(14, 47, 74, .5);
  border-left: 2px solid var(--neon);
  border-radius: 0 var(--r-m) var(--r-m) 0;
}

.page-about .about-origin__note h3 {
  margin: 0 0 .55rem;
  font-family: var(--font-display);
  font-size: clamp(1.02rem, 2.4vw, 1.26rem);
  letter-spacing: -.01em;
  color: var(--neon);
}

.page-about .about-origin__note p {
  margin: 0;
  font-size: .95rem;
  line-height: 1.86;
  color: rgba(246, 238, 223, .8);
}

/* ---------- 产品方法 ---------- */
.page-about .about-method {
  padding: clamp(3rem, 8vw, 6rem) 0;
  background:
    radial-gradient(circle at 84% 6%, rgba(255, 92, 138, .14), transparent 46%),
    var(--ink-950);
}

.page-about .about-method__head {
  margin-bottom: clamp(1.5rem, 4vw, 2.4rem);
}

.page-about .about-band {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin-bottom: clamp(1.4rem, 3.5vw, 2.2rem);
  background: var(--glass-line);
  border: 1px solid var(--glass-line);
  border-radius: var(--r-l);
  overflow: hidden;
}

.page-about .about-band__item {
  display: flex;
  flex-direction: column;
  gap: .55rem;
  padding: clamp(1.15rem, 3vw, 1.9rem);
  background: rgba(10, 36, 56, .84);
  transition: background .25s ease;
}

.page-about .about-band__item:hover {
  background: rgba(14, 47, 74, .96);
}

.page-about .about-band__no {
  font-size: .74rem;
  letter-spacing: .2em;
  color: var(--gold);
}

.page-about .about-band__item h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.22rem;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-about .about-band__item p {
  margin: 0;
  font-size: .93rem;
  line-height: 1.8;
  color: rgba(246, 238, 223, .76);
}

.page-about .about-tools {
  display: grid;
  gap: 1rem;
  margin-bottom: clamp(1.4rem, 3.5vw, 2.1rem);
  padding: clamp(1.1rem, 3vw, 1.7rem);
  border: 1px dashed var(--glass-line);
  border-radius: var(--r-l);
}

.page-about .about-tools__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.02rem;
  color: var(--paper);
}

.page-about .about-tools__list {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-tools__list li {
  padding: .42rem .85rem;
  font-size: .84rem;
  line-height: 1.4;
  color: var(--neon);
  background: rgba(53, 240, 200, .1);
  border: 1px solid rgba(53, 240, 200, .28);
  border-radius: 999px;
}

.page-about .about-cadence {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: .35rem 1.1rem;
  padding: clamp(1rem, 2.6vw, 1.4rem) 0;
  border-top: 1px solid var(--glass-line);
  border-bottom: 1px solid var(--glass-line);
}

.page-about .about-cadence__k {
  margin: 0;
  font-size: .92rem;
  letter-spacing: .16em;
  color: var(--rose);
}

.page-about .about-cadence__text {
  margin: 0;
  flex: 1 1 16em;
  font-size: .94rem;
  line-height: 1.8;
  color: rgba(246, 238, 223, .8);
}

.page-about .about-method__links {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin: clamp(1.3rem, 3vw, 1.9rem) 0 0;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding: clamp(3rem, 8vw, 6rem) 0;
  background: var(--ink-900);
}

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  align-items: center;
  gap: clamp(1.6rem, 4vw, 3rem);
}

.page-about .about-team__media .media-frame {
  aspect-ratio: 3 / 2;
  border: 1px solid var(--glass-line);
  box-shadow: var(--dock-shadow);
}

.page-about .about-team__copy h2 {
  margin: 0 0 .8rem;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 4.4vw, 2.4rem);
  line-height: 1.18;
  letter-spacing: -.02em;
  color: var(--paper);
  text-wrap: balance;
}

.page-about .about-team__lede {
  margin: 0;
  max-width: 32em;
  line-height: 1.82;
  color: rgba(246, 238, 223, .78);
}

.page-about .about-roles {
  display: grid;
  gap: 1px;
  margin: 1.3rem 0 0;
  padding: 0;
  list-style: none;
  background: var(--glass-line);
  border-radius: var(--r-m);
  overflow: hidden;
}

.page-about .about-roles li {
  display: grid;
  grid-template-columns: 3.2rem minmax(0, 1fr);
  align-items: baseline;
  gap: .9rem;
  padding: .9rem 1rem;
  background: rgba(10, 36, 56, .74);
}

.page-about .about-roles__n {
  font-size: clamp(1.1rem, 2.6vw, 1.42rem);
  letter-spacing: -.01em;
  color: var(--gold);
}

.page-about .about-roles__t {
  font-size: .91rem;
  line-height: 1.7;
  color: rgba(246, 238, 223, .78);
}

/* ---------- 服务网络 ---------- */
.page-about .about-network {
  padding: clamp(3rem, 8vw, 6rem) 0;
  background: linear-gradient(180deg, var(--ink-800), var(--ink-950));
}

.page-about .about-network__head {
  margin-bottom: clamp(1.3rem, 3.5vw, 2rem);
}

.page-about .about-network__banner {
  margin-bottom: clamp(1.5rem, 4vw, 2.4rem);
}

.page-about .about-network__banner .media-frame {
  aspect-ratio: 12 / 7;
  border: 1px solid var(--glass-line);
}

.page-about .about-network__grid {
  display: grid;
  grid-template-columns: 1fr;
  align-items: center;
  gap: clamp(1.5rem, 4vw, 2.6rem);
}

.page-about .about-network__map {
  padding: clamp(.4rem, 2vw, 1.1rem);
  border: 1px solid var(--glass-line);
  border-radius: var(--r-l);
  background:
    radial-gradient(circle at 50% 50%, rgba(53, 240, 200, .1), transparent 68%),
    rgba(4, 18, 30, .62);
  overflow: hidden;
}

.page-about .about-network__map svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .an-node {
  cursor: default;
  outline: none;
}

.page-about .an-node__link {
  stroke: rgba(53, 240, 200, .3);
  stroke-width: 1.2;
  transition: stroke .2s ease, stroke-width .2s ease;
}

.page-about .an-node__dot {
  fill: var(--ink-900);
  stroke: var(--neon);
  stroke-width: 2.2;
  transition: fill .2s ease, stroke .2s ease;
}

.page-about .an-node__label {
  fill: rgba(246, 238, 223, .7);
  font-family: var(--font-body);
  font-size: 16px;
  text-anchor: middle;
  transition: fill .2s ease;
}

.page-about .an-node:hover .an-node__link,
.page-about .an-node:focus-visible .an-node__link {
  stroke: var(--neon);
  stroke-width: 2.2;
}

.page-about .an-node:hover .an-node__dot,
.page-about .an-node:focus-visible .an-node__dot {
  fill: var(--neon);
}

.page-about .an-node:hover .an-node__label,
.page-about .an-node:focus-visible .an-node__label {
  fill: var(--paper);
}

.page-about .an-node:focus-visible .an-node__dot {
  stroke: var(--gold);
  stroke-width: 3;
}

.page-about .an-hub circle {
  fill: var(--gold);
}

.page-about .an-hub text {
  fill: var(--gold);
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 700;
}

.page-about .about-network__copy p {
  margin: 0 0 .95rem;
  line-height: 1.85;
  color: rgba(246, 238, 223, .8);
}

.page-about .about-network__contact {
  display: grid;
  gap: .45rem;
  margin-top: 1.3rem;
  padding-top: 1.1rem;
  border-top: 1px solid var(--glass-line);
}

.page-about .about-network__contact p {
  margin: 0;
  line-height: 1.7;
}

.page-about .about-network__contact .mono {
  color: var(--neon);
  letter-spacing: .04em;
}

/* ---------- 节点 ---------- */
.page-about .about-timeline {
  padding: clamp(3rem, 8vw, 6rem) 0;
  background: var(--ink-950);
}

.page-about .about-tl {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(230px, 76vw);
  gap: 1rem;
  overflow-x: auto;
  padding: 0 var(--gutter) 1.1rem;
  scroll-snap-type: x proximity;
}

.page-about .about-tl__item {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: .5rem;
  scroll-snap-align: start;
  padding: 1.35rem 1.1rem 1.15rem;
  background: rgba(10, 36, 56, .72);
  border: 1px solid var(--glass-line);
  border-radius: var(--r-m);
}

.page-about .about-tl__item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 1.1rem;
  width: 26px;
  height: 3px;
  border-radius: 0 0 3px 3px;
  background: var(--gold);
}

.page-about .about-tl__step {
  font-size: .72rem;
  letter-spacing: .2em;
  color: var(--light-dim);
}

.page-about .about-tl__item h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.04rem;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-about .about-tl__item p {
  margin: 0;
  font-size: .88rem;
  line-height: 1.76;
  color: rgba(246, 238, 223, .74);
}

/* ---------- 收尾 ---------- */
.page-about .about-next {
  padding: clamp(3rem, 7vw, 5rem) 0 clamp(3.5rem, 8vw, 6rem);
  background: var(--ink-900);
}

.page-about .about-next__inner {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.2rem, 3vw, 2.4rem);
  padding: clamp(1.5rem, 4vw, 2.8rem);
  color: var(--ink-text);
  background: var(--paper);
  border-radius: var(--r-l);
  overflow: hidden;
}

.page-about .about-next__inner::before {
  content: "";
  position: absolute;
  top: -50px;
  right: -50px;
  width: 220px;
  height: 220px;
  background: radial-gradient(circle, rgba(53, 240, 200, .38), transparent 70%);
  pointer-events: none;
}

.page-about .about-next__inner h2 {
  margin: 0 0 .6rem;
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 3.6vw, 2.15rem);
  letter-spacing: -.02em;
  color: var(--ink-text);
}

.page-about .about-next__inner p {
  margin: 0;
  max-width: 32em;
  line-height: 1.82;
  color: var(--muted);
}

.page-about .about-next__links {
  position: relative;
  display: grid;
  gap: .55rem;
}

.page-about .about-next__links a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: .82rem 1rem;
  font-size: .91rem;
  color: var(--paper);
  text-decoration: none;
  background: var(--ink-900);
  border-radius: var(--r-m);
  transition: transform .2s ease, background .2s ease;
}

.page-about .about-next__links a::after {
  content: "→";
  color: var(--neon);
}

.page-about .about-next__links a:hover,
.page-about .about-next__links a:focus-visible {
  transform: translateX(3px);
  background: var(--ink-700);
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-about .about-band {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-tools {
    grid-template-columns: minmax(0, .42fr) minmax(0, 1fr);
    align-items: center;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.28fr) minmax(0, .92fr);
    align-items: end;
  }

  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, .86fr) minmax(0, 1.14fr);
    align-items: start;
  }

  .page-about .about-origin__aside {
    position: sticky;
    top: 96px;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr);
  }

  .page-about .about-team__media .media-frame {
    transform: rotate(-1.2deg);
  }

  .page-about .about-network__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  }

  .page-about .about-tl {
    grid-auto-flow: row;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    grid-auto-columns: auto;
    gap: .9rem;
    max-width: var(--wrap);
    margin-inline: auto;
    padding: 0 var(--gutter);
    overflow: visible;
  }

  .page-about .about-next__inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, .92fr);
    align-items: center;
  }
}

@media (max-width: 380px) {
  .page-about .about-hero__stats {
    grid-template-columns: 1fr;
  }

  .page-about .about-roles li {
    grid-template-columns: 2.6rem minmax(0, 1fr);
    gap: .65rem;
  }

  .page-about .about-tl {
    grid-auto-columns: minmax(200px, 84vw);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-band__item,
  .page-about .about-next__links a,
  .page-about .an-node__dot,
  .page-about .an-node__link,
  .page-about .an-node__label,
  .page-about .crumbs a {
    transition: none;
  }

  .page-about .about-team__media .media-frame {
    transform: none;
  }

  .page-about .about-next__links a:hover,
  .page-about .about-next__links a:focus-visible {
    transform: none;
  }
}