.page-about {
  --about-band-pad: clamp(26px, 4vw, 48px);
  overflow-x: hidden;
  background:
    radial-gradient(980px 560px at 88% -6%, rgba(61, 245, 200, .13), transparent 62%),
    radial-gradient(760px 520px at -12% 34%, rgba(92, 200, 255, .08), transparent 66%),
    var(--ink-900);
  color: var(--paper);
}

.page-about h2 {
  font-size: clamp(24px, 3.2vw, 38px);
  line-height: 1.22;
  letter-spacing: -.012em;
  margin: 10px 0 14px;
}

.page-about h3 {
  font-size: clamp(16px, 1.8vw, 20px);
  line-height: 1.42;
  margin: 0 0 8px;
}

.page-about .about-head {
  max-width: 74ch;
  margin-bottom: clamp(22px, 3.4vw, 40px);
}

.page-about .about-head .lead {
  margin: 0;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  padding-top: clamp(30px, 5vw, 64px);
  padding-bottom: clamp(30px, 4.6vw, 60px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: -22%;
  right: -20%;
  width: min(78vw, 640px);
  aspect-ratio: 1 / 1;
  background: linear-gradient(145deg, rgba(61, 245, 200, .22), rgba(61, 245, 200, 0) 66%);
  clip-path: polygon(28% 0, 100% 0, 100% 72%, 0 100%);
  pointer-events: none;
}

.page-about .about-hero .container {
  position: relative;
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(26px, 4vw, 46px);
  align-items: start;
  margin-top: clamp(18px, 3vw, 30px);
}

.page-about .about-hero__intro h1 {
  font-size: clamp(30px, 5.2vw, 58px);
  line-height: 1.14;
  letter-spacing: -.022em;
  margin: 14px 0 18px;
  font-weight: 800;
}

.page-about .about-hero__intro .lead {
  max-width: 62ch;
  margin: 0;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 32px);
}

.page-about .about-claim {
  margin: 0 0 14px;
  padding: 18px 20px;
  border-radius: var(--r-md);
  background: linear-gradient(140deg, rgba(61, 245, 200, .18), rgba(18, 56, 46, .58));
  border: 1px solid var(--line);
  box-shadow: var(--shadow-soft);
  font-size: clamp(19px, 2.1vw, 23px);
  font-weight: 800;
  line-height: 1.45;
  letter-spacing: .01em;
  color: var(--cyan-soft);
}

.page-about .about-hero__side {
  border-left: 3px solid var(--orange);
  padding-left: 16px;
}

.page-about .about-hero__side .muted {
  margin: 0;
  line-height: 1.75;
}

@media (min-width: 920px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, .95fr);
  }

  .page-about .about-hero__side {
    margin-top: 12px;
  }
}

/* ---------- 发展历程 ---------- */
.page-about .about-track__media {
  --media-ratio: 7 / 4;
  margin: 0 0 clamp(24px, 3.6vw, 40px);
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-stage__box {
  border: 1px solid var(--line-soft);
  border-left: 3px solid var(--cyan);
  border-radius: var(--r-md);
  background: linear-gradient(120deg, rgba(18, 56, 46, .72), rgba(8, 28, 23, .46));
  overflow: hidden;
  transition: border-color var(--dur) var(--ease);
}

.page-about .about-stage:nth-child(2) .about-stage__box {
  border-left-color: var(--blue);
}

.page-about .about-stage:nth-child(3) .about-stage__box {
  border-left-color: var(--orange);
}

.page-about .about-stage:nth-child(4) .about-stage__box {
  border-left-color: var(--red);
}

.page-about .about-stage__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 8px 16px;
  align-items: center;
  padding: 15px 18px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-stage__head::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--mist);
  transition: transform var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .about-stage__box[open] .about-stage__head::after {
  transform: rotate(45deg);
  color: var(--cyan);
}

.page-about .about-stage__year {
  font-size: clamp(19px, 2.4vw, 26px);
  font-weight: 700;
  letter-spacing: .01em;
  line-height: 1.1;
  color: var(--cyan);
}

.page-about .about-stage__name {
  font-weight: 700;
  font-size: clamp(15px, 1.7vw, 18px);
  line-height: 1.45;
  min-width: 0;
}

.page-about .about-stage__body {
  padding: 0 18px 18px;
  border-top: 1px dashed var(--line);
  margin: 0 18px;
  padding-left: 0;
  padding-right: 0;
  padding-top: 14px;
}

.page-about .about-stage__body p {
  margin: 0;
  max-width: 78ch;
  line-height: 1.8;
  color: var(--paper);
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: clamp(22px, 3vw, 36px);
}

.page-about .about-team__intro p {
  margin: 0;
  max-width: 62ch;
  line-height: 1.8;
}

.page-about .about-team__media {
  --media-ratio: 3 / 2;
  margin: 0;
}

.page-about .about-crew {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-crew__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px 16px;
  align-items: start;
  padding: 16px 18px;
  border-radius: var(--r-md);
  border: 1px solid var(--line-soft);
  background: linear-gradient(120deg, rgba(18, 56, 46, .62), rgba(8, 28, 23, .4));
}

.page-about .about-crew__num {
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--cyan);
  padding-top: 2px;
}

.page-about .about-crew__text {
  min-width: 0;
}

.page-about .about-crew__text p {
  margin: 0;
  line-height: 1.75;
  color: var(--mist);
  font-size: 15px;
}

@media (min-width: 960px) {
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    grid-template-areas:
      "intro media"
      "crew  media";
    align-items: start;
    column-gap: clamp(28px, 4.4vw, 60px);
  }

  .page-about .about-team__intro {
    grid-area: intro;
  }

  .page-about .about-team__media {
    grid-area: media;
  }

  .page-about .about-crew {
    grid-area: crew;
  }
}

/* ---------- 协作网络 ---------- */
.page-about .about-network__body {
  display: grid;
  gap: clamp(22px, 3vw, 40px);
  align-items: center;
  margin: 0 0 clamp(20px, 3vw, 32px);
}

.page-about .about-network__map {
  padding: clamp(12px, 2vw, 22px);
  border-radius: var(--r-lg);
  border: 1px solid var(--line-soft);
  background:
    radial-gradient(420px 260px at 50% 50%, rgba(61, 245, 200, .09), transparent 70%),
    var(--ink-750);
  min-width: 0;
}

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

.page-about .about-net__line {
  stroke: rgba(61, 245, 200, .34);
  stroke-width: 1.5;
  stroke-dasharray: 5 7;
}

.page-about .about-net__hub {
  fill: rgba(61, 245, 200, .16);
  stroke: var(--cyan);
  stroke-width: 1.6;
}

.page-about .about-net__sat {
  fill: rgba(92, 200, 255, .1);
  stroke: rgba(92, 200, 255, .58);
  stroke-width: 1.6;
  transition: fill var(--dur) var(--ease), stroke var(--dur) var(--ease);
}

.page-about .about-net__node {
  cursor: default;
}

.page-about .about-net__node:hover .about-net__sat,
.page-about .about-net__node:focus-visible .about-net__sat {
  fill: rgba(255, 138, 61, .26);
  stroke: var(--orange);
}

.page-about .about-net__label {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 700;
  fill: var(--paper);
}

.page-about .about-net__role {
  font-family: var(--font-mono);
  font-size: 11.5px;
  fill: var(--cyan-soft);
  opacity: 0;
  transition: opacity var(--dur) var(--ease);
}

.page-about .about-net__node:hover .about-net__role,
.page-about .about-net__node:focus-visible .about-net__role {
  opacity: 1;
}

.page-about .about-network__media {
  --media-ratio: 4 / 3;
  margin: 0;
}

.page-about .about-network__note {
  margin: 0;
  padding-left: 16px;
  border-left: 3px solid var(--data-blue, var(--blue));
  max-width: 82ch;
  line-height: 1.8;
  color: var(--mist);
}

@media (min-width: 900px) {
  .page-about .about-network__body {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
  }
}

/* ---------- 覆盖与节奏 ---------- */
.page-about .about-reach__band {
  background: linear-gradient(100deg, var(--ink-750), var(--ink-800));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: var(--about-band-pad) 0 calc(var(--about-band-pad) + 26px);
  margin-top: clamp(4px, 1vw, 12px);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), 0 100%);
}

.page-about .about-reach__grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(20px, 2.6vw, 32px);
  grid-template-columns: minmax(0, 1fr);
}

.page-about .about-reach__item {
  min-width: 0;
  padding-left: 14px;
  border-left: 3px solid var(--cyan);
}

.page-about .about-reach__item:nth-child(2) {
  border-left-color: var(--blue);
}

.page-about .about-reach__item:nth-child(3) {
  border-left-color: var(--orange);
}

.page-about .about-reach__item:nth-child(4) {
  border-left-color: var(--red);
}

.page-about .about-reach__num {
  display: block;
  font-size: clamp(30px, 4.2vw, 46px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -.03em;
  color: var(--paper);
}

.page-about .about-reach__num em {
  font-style: normal;
  font-size: .6em;
  margin-left: 2px;
  color: var(--cyan);
}

.page-about .about-reach__label {
  display: block;
  margin: 6px 0 8px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--cyan);
}

.page-about .about-reach__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .about-reach__notes {
  display: grid;
  gap: 14px;
  margin-top: clamp(22px, 3vw, 34px);
  padding-top: clamp(18px, 2.4vw, 26px);
  border-top: 1px dashed var(--line);
}

.page-about .about-reach__notes p {
  margin: 0;
  line-height: 1.8;
}

.page-about .about-reach__k {
  display: inline-block;
  margin-right: 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--cyan);
}

@media (min-width: 640px) {
  .page-about .about-reach__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1040px) {
  .page-about .about-reach__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-reach__notes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 30px;
  }
}

/* ---------- 荣誉与资质 ---------- */
.page-about .about-honor__grid {
  display: grid;
  gap: clamp(24px, 3.4vw, 44px);
  align-items: start;
}

.page-about .about-honor__intro p {
  margin: 0;
  max-width: 58ch;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-honor__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .about-honor__item {
  padding: 20px 0 22px;
  border-bottom: 1px dashed var(--line-soft);
}

.page-about .about-honor__item:first-child {
  padding-top: 0;
}

.page-about .about-honor__item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.page-about .about-honor__item .tag {
  margin-bottom: 10px;
}

.page-about .about-honor__item p {
  margin: 0;
  line-height: 1.75;
  color: var(--mist);
  max-width: 64ch;
}

@media (min-width: 940px) {
  .page-about .about-honor__grid {
    grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr);
    column-gap: clamp(32px, 5vw, 72px);
  }
}

/* ---------- 继续了解 ---------- */
.page-about .about-next {
  border-top: 1px solid var(--line-soft);
}

.page-about .about-next__grid {
  display: grid;
  gap: 14px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-next__link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-rows: auto auto;
  gap: 4px 14px;
  align-items: center;
  padding: 16px 18px;
  border-radius: var(--r-md);
  border: 1px solid var(--line-soft);
  background: linear-gradient(130deg, rgba(18, 56, 46, .55), rgba(8, 28, 23, .38));
  text-decoration: none;
  color: var(--paper);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-next__link:hover,
.page-about .about-next__link:focus-visible {
  border-color: var(--cyan);
  background: linear-gradient(130deg, rgba(61, 245, 200, .14), rgba(18, 56, 46, .5));
  transform: translateY(-2px);
}

.page-about .about-next__idx {
  grid-row: 1 / span 2;
  font-size: 13px;
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: .08em;
  align-self: start;
  padding-top: 4px;
}

.page-about .about-next__name {
  font-size: clamp(16px, 1.8vw, 19px);
  font-weight: 800;
  letter-spacing: -.01em;
}

.page-about .about-next__desc {
  font-size: 14px;
  line-height: 1.6;
  color: var(--mist);
}

@media (min-width: 700px) {
  .page-about .about-next__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1060px) {
  .page-about .about-next__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-stage__head::after,
  .page-about .about-next__link,
  .page-about .about-net__sat,
  .page-about .about-net__role {
    transition: none;
  }

  .page-about .about-next__link:hover,
  .page-about .about-next__link:focus-visible {
    transform: none;
  }
}
</main>

.page-about {
  --data-blue: currentColor;
}