.page-about {
  --about-rail: 184px;
  background: linear-gradient(180deg, var(--ink) 0%, var(--space) 22%, var(--space) 82%, var(--ink) 100%);
  color: var(--paper);
  overflow-x: clip;
}

/* ============ 首屏 ============ */
.page-about .about-hero {
  position: relative;
  padding: clamp(22px, 4vw, 52px) 0 clamp(34px, 5vw, 68px);
  background:
    radial-gradient(130% 100% at 6% -12%, rgba(44, 224, 224, 0.16), transparent 62%),
    radial-gradient(90% 78% at 100% 0%, rgba(255, 162, 43, 0.12), transparent 60%);
}

.page-about .about-hero__copy {
  max-width: 60ch;
  margin-top: clamp(20px, 3vw, 34px);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-hero__figure {
  position: relative;
  margin: clamp(24px, 4vw, 42px) 0 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  aspect-ratio: 4 / 3;
  background: var(--panel);
}

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

/* ============ 关键数字 ============ */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(22px, 3.4vw, 36px) 0 0;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .about-stat {
  padding: clamp(14px, 2vw, 22px);
  background: rgba(16, 41, 61, 0.76);
}

.page-about .about-stat dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.page-about .about-stat dd {
  margin: 8px 0 0;
  font-size: clamp(14px, 1.5vw, 17px);
  color: var(--paper);
  line-height: 1.2;
}

.page-about .about-stat dd .u-num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3vw, 34px);
  color: var(--cyan);
  margin-right: 4px;
}

/* ============ 通用区块 ============ */
.page-about .about-sec {
  padding: clamp(42px, 6.5vw, 92px) 0;
}

.page-about .about-sec__head {
  max-width: 62ch;
  margin-bottom: clamp(24px, 4vw, 46px);
}

.page-about .about-sec__head .u-kicker {
  display: block;
  margin-bottom: 12px;
  color: var(--cyan);
}

.page-about .about-sec__lead {
  margin: 14px 0 0;
  color: var(--mist);
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.75;
}

/* ============ 时间线 ============ */
.page-about .about-story {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(18px, 3vw, 36px);
}

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

.page-about .about-rail__list {
  list-style: none;
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 2px 0 10px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-rail__link {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 9px 15px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line);
  background: rgba(16, 41, 61, 0.55);
  color: var(--mist);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  color: var(--cyan-soft);
  border-color: rgba(44, 224, 224, 0.45);
  background: rgba(44, 224, 224, 0.1);
  outline: none;
}

.page-about .about-rail__link:focus-visible {
  box-shadow: 0 0 0 3px rgba(44, 224, 224, 0.28);
}

.page-about .about-rail__link .u-num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--amber);
}

.page-about .about-rail__label {
  font-size: 13px;
}

.page-about .about-nodes {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(16px, 2.4vw, 24px);
  min-width: 0;
}

.page-about .about-node {
  position: relative;
  padding: clamp(20px, 2.6vw, 30px);
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: linear-gradient(158deg, rgba(16, 41, 61, 0.94), rgba(8, 24, 38, 0.94));
  scroll-margin-top: 110px;
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.page-about .about-node:hover {
  border-color: var(--line-strong);
}

.page-about .about-node:target {
  border-color: rgba(255, 162, 43, 0.55);
  box-shadow: 0 0 0 1px rgba(255, 162, 43, 0.24);
}

.page-about .about-node__tag {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--amber);
}

.page-about .about-node__tag::before {
  content: "";
  width: 24px;
  height: 2px;
  flex: none;
  border-radius: 2px;
  background: var(--amber);
}

.page-about .about-node__tag .u-num {
  font-family: var(--font-mono);
}

.page-about .about-node .u-h3 {
  margin: 0 0 10px;
  font-size: clamp(19px, 2.1vw, 24px);
}

.page-about .about-node p {
  margin: 0 0 10px;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.8;
}

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

.page-about .about-node .about-node__mark {
  display: inline-block;
  margin-top: 6px;
  padding: 6px 15px;
  border-radius: var(--r-pill);
  border: 1px solid rgba(44, 224, 224, 0.28);
  background: rgba(44, 224, 224, 0.1);
  color: var(--cyan-soft);
  font-size: 13px;
  line-height: 1.5;
}

/* ============ 团队 ============ */
.page-about .about-people {
  display: grid;
  gap: clamp(16px, 2.6vw, 28px);
}

.page-about .about-bar {
  display: flex;
  height: clamp(50px, 6.4vw, 74px);
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  overflow: hidden;
}

.page-about .about-bar__seg {
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: clamp(13px, 1.5vw, 19px);
  font-weight: 700;
  color: var(--ink);
  cursor: default;
  transition: filter 0.2s ease;
}

.page-about .about-bar__seg:hover {
  filter: brightness(1.16);
}

.page-about .about-bar__seg--data {
  flex: 22;
  background: var(--cyan);
}

.page-about .about-bar__seg--content {
  flex: 18;
  background: var(--cyan-soft);
}

.page-about .about-bar__seg--product {
  flex: 12;
  background: var(--mint);
}

.page-about .about-bar__seg--service {
  flex: 9;
  background: var(--amber);
}

.page-about .about-bar__seg--biz {
  flex: 7;
  background: var(--mist);
}

.page-about .about-teams {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--line);
  overflow: hidden;
}

.page-about .about-team {
  padding: clamp(18px, 2.4vw, 26px);
  background: rgba(16, 41, 61, 0.84);
}

.page-about .about-team__name {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-team__name .u-num {
  font-family: var(--font-mono);
  font-size: 20px;
  color: var(--cyan);
}

.page-about .about-team p:last-child {
  margin: 0;
  color: var(--mist);
  font-size: 14.5px;
  line-height: 1.78;
}

/* ============ 生产流程 ============ */
.page-about .about-flow {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 44px);
}

.page-about .about-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  min-width: 0;
}

.page-about .about-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(14px, 2vw, 24px);
  padding: clamp(16px, 2.2vw, 22px) 0;
  border-top: 1px solid var(--line);
}

.page-about .about-step:last-child {
  border-bottom: 1px solid var(--line);
}

.page-about .about-step__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--amber);
  padding-top: 4px;
}

.page-about .about-step .u-h3 {
  margin: 0 0 6px;
  font-size: clamp(17px, 1.9vw, 21px);
}

.page-about .about-step p {
  margin: 0;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.78;
}

.page-about .about-flow__figure {
  margin: 0;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: var(--panel);
  overflow: hidden;
}

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

.page-about .about-flow__cap {
  padding: 13px 18px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--mist);
  line-height: 1.7;
}

/* ============ 合作生态 ============ */
.page-about .about-eco {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3.6vw, 44px);
  align-items: center;
}

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

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

.page-about .eco-links line {
  stroke: rgba(184, 245, 242, 0.22);
  stroke-width: 1.4;
  stroke-dasharray: 4 7;
}

.page-about .eco-hub {
  fill: rgba(16, 41, 61, 0.96);
  stroke: var(--cyan);
  stroke-width: 2;
}

.page-about .about-eco__map text {
  text-anchor: middle;
  font-family: var(--font-sans);
}

.page-about .eco-hub-title {
  fill: var(--paper);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 1px;
}

.page-about .eco-hub-sub {
  fill: var(--mist);
  font-size: 12px;
}

.page-about .eco-node circle {
  fill: rgba(8, 24, 38, 0.92);
  stroke-width: 1.8;
}

.page-about .eco-node--club circle {
  stroke: var(--amber);
}

.page-about .eco-node--venue circle {
  stroke: var(--mint);
}

.page-about .eco-node--media circle {
  stroke: var(--cyan);
}

.page-about .eco-node--asso circle {
  stroke: var(--cyan-soft);
}

.page-about .eco-num {
  font-family: var(--font-mono);
  font-size: 19px;
  font-weight: 700;
}

.page-about .eco-node--club .eco-num {
  fill: var(--amber);
}

.page-about .eco-node--venue .eco-num {
  fill: var(--mint);
}

.page-about .eco-node--media .eco-num {
  fill: var(--cyan);
}

.page-about .eco-node--asso .eco-num {
  fill: var(--cyan-soft);
}

.page-about .eco-lab {
  fill: var(--mist);
  font-size: 12px;
}

.page-about .about-eco__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(10px, 1.6vw, 16px);
  min-width: 0;
}

.page-about .about-eco__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: 16px;
  row-gap: 3px;
  padding: 15px 18px;
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: rgba(16, 41, 61, 0.62);
}

.page-about .about-eco__count {
  grid-row: span 2;
  align-self: center;
  font-family: var(--font-mono);
  font-size: clamp(22px, 2.6vw, 28px);
  line-height: 1;
  color: var(--cyan);
}

.page-about .about-eco__name {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-eco__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--mist);
}

.page-about .about-eco__figure {
  margin: clamp(24px, 4vw, 44px) 0 0;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  overflow: hidden;
}

.page-about .about-eco__figure img {
  display: block;
  width: 100%;
  height: clamp(180px, 30vw, 360px);
  object-fit: cover;
}

/* ============ 服务范围 ============ */
.page-about .about-local {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3.4vw, 40px);
  align-items: start;
}

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

.page-about .about-local__main .u-kicker {
  display: block;
  margin-bottom: 12px;
  color: var(--cyan);
}

.page-about .about-local__main p {
  margin: 14px 0 0;
  max-width: 58ch;
  color: var(--mist);
  font-size: 15.5px;
  line-height: 1.82;
}

.page-about .about-local__facts {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 24px 0 0;
  padding: 0;
}

.page-about .about-local__facts li {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 16px;
  border-radius: var(--r-pill);
  border: 1px solid rgba(44, 224, 224, 0.26);
  background: rgba(44, 224, 224, 0.08);
  font-size: 14px;
  color: var(--paper);
}

.page-about .about-local__facts .u-num {
  font-family: var(--font-mono);
  font-size: 20px;
  color: var(--cyan);
}

.page-about .about-local__card {
  padding: clamp(20px, 2.6vw, 28px);
  border-radius: var(--r-lg);
  border: 1px solid var(--line-strong);
  background: linear-gradient(158deg, rgba(16, 41, 61, 0.96), rgba(8, 24, 38, 0.96));
}

.page-about .about-local__card .u-h3 {
  margin: 0 0 18px;
  font-size: 18px;
}

.page-about .about-local__card dl {
  margin: 0;
  display: grid;
  gap: 15px;
}

.page-about .about-local__card dt {
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.page-about .about-local__card dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--paper);
  word-break: break-word;
}

.page-about .about-local__card dd a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(44, 224, 224, 0.35);
}

.page-about .about-local__card dd a:hover,
.page-about .about-local__card dd a:focus-visible {
  color: var(--cyan-soft);
  border-bottom-color: var(--cyan-soft);
  outline: none;
}

.page-about .about-local__note {
  margin: 18px 0 0;
  padding-top: 15px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.72;
  color: var(--mist);
}

/* ============ 资质 ============ */
.page-about .about-cert {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--line);
  overflow: hidden;
}

.page-about .about-cert li {
  padding: clamp(22px, 3vw, 34px);
  background: rgba(16, 41, 61, 0.84);
}

.page-about .about-cert__tag {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--mint);
}

.page-about .about-cert .u-h3 {
  margin: 0 0 10px;
  font-size: clamp(17px, 1.8vw, 20px);
}

.page-about .about-cert li p:last-child {
  margin: 0;
  color: var(--mist);
  font-size: 14.5px;
  line-height: 1.78;
}

/* ============ 收尾 ============ */
.page-about .about-cta {
  padding: clamp(20px, 3vw, 40px) 0 clamp(48px, 7vw, 96px);
}

.page-about .about-cta__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 36px);
  padding: clamp(24px, 4vw, 48px);
  border-radius: var(--r-lg);
  border: 1px solid var(--line-strong);
  background:
    radial-gradient(120% 140% at 0% 0%, rgba(44, 224, 224, 0.16), transparent 62%),
    linear-gradient(140deg, rgba(16, 41, 61, 0.96), rgba(4, 9, 15, 0.96));
}

.page-about .about-cta__inner .u-h2 {
  margin: 0;
}

.page-about .about-cta__inner p {
  margin: 14px 0 0;
  max-width: 54ch;
  color: var(--mist);
  font-size: 15.5px;
  line-height: 1.8;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ============ 响应式 ============ */
@media (min-width: 720px) {
  .page-about .about-hero__figure {
    aspect-ratio: 16 / 7;
    max-height: 380px;
  }

  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

@media (min-width: 900px) {
  .page-about .about-story {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(26px, 3.6vw, 56px);
  }

  .page-about .about-rail {
    position: sticky;
    top: 96px;
    align-self: start;
  }

  .page-about .about-rail__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding: 0;
  }

  .page-about .about-rail__link {
    border-radius: var(--r-sm);
    border-color: transparent;
    background: transparent;
    padding: 11px 14px;
    white-space: normal;
  }

  .page-about .about-flow {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-about .about-eco {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
  }

  .page-about .about-local {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 7fr) auto;
    align-items: center;
  }
}

@media (min-width: 1080px) {
  .page-about .about-teams {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-cert {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about {
    --about-rail: 208px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}