.page-about {
  background: var(--ink);
  color: var(--frost);
  overflow-x: hidden;
  padding-bottom: 64px;
}

.page-about .about-crumb {
  padding-top: 26px;
  padding-bottom: 4px;
}

.page-about .breadcrumb__item a {
  color: var(--slate);
  text-decoration: none;
  transition: color .2s var(--ease);
}

.page-about .breadcrumb__item a:hover,
.page-about .breadcrumb__item a:focus-visible {
  color: var(--cyan);
}

.page-about .breadcrumb__item span {
  color: var(--frost);
}

.page-about .about-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  padding: 26px 0 54px;
  position: relative;
  background:
    radial-gradient(1100px 420px at 88% -10%, rgba(45, 226, 230, .16), transparent 62%),
    radial-gradient(700px 360px at 4% 110%, rgba(255, 107, 53, .12), transparent 66%);
}

.page-about .about-hero__grid {
  display: grid;
  gap: 30px;
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.15rem, 6.6vw, 3.7rem);
  line-height: 1.06;
  letter-spacing: -.022em;
  color: var(--mint);
  margin: 14px 0 18px;
  max-width: 18ch;
}

.page-about .about-hero__lede {
  font-size: 1.02rem;
  line-height: 1.8;
  color: rgba(232, 237, 242, .76);
  max-width: 56ch;
  margin: 0 0 26px;
}

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

.page-about .about-hero__facts {
  position: relative;
  border-radius: var(--r-lg);
  background: rgba(16, 42, 67, .74);
  border: 1px solid var(--line-strong);
  padding: 22px 20px;
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-lg);
}

.page-about .about-hero__facts::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  border-radius: var(--r-lg) 0 0 var(--r-lg);
  background: linear-gradient(180deg, var(--cyan), var(--orange));
}

.page-about .about-hero__facts-title {
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--cyan);
  margin: 0 0 16px;
}

.page-about .about-facts {
  margin: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-facts__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding-bottom: 12px;
  border-bottom: 1px dashed rgba(232, 237, 242, .14);
}

.page-about .about-facts__row:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-facts dt {
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .08em;
  color: var(--slate);
  white-space: nowrap;
}

.page-about .about-facts dd {
  margin: 0;
  font-size: .92rem;
  color: var(--frost);
  text-align: right;
}

.page-about .about-facts dd .about-num {
  color: var(--cyan);
  font-size: 1.1rem;
  font-weight: 600;
}

.page-about .about-hero__facts-foot {
  margin: 16px 0 0;
  font-size: .82rem;
  line-height: 1.65;
  color: var(--slate);
}

/* ---------- 通用区块分隔 ---------- */

.page-about .section {
  padding: 46px 0;
}

.page-about .about-lead {
  font-size: 1rem;
  line-height: 1.8;
  color: rgba(232, 237, 242, .72);
  max-width: 62ch;
  margin: 14px 0 0;
}

.page-about .kicker {
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--amber);
  margin: 0;
}

.page-about h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.6rem, 4vw, 2.35rem);
  line-height: 1.14;
  letter-spacing: -.014em;
  color: var(--mint);
  margin: 10px 0 0;
  max-width: 22ch;
}

.page-about h3 {
  font-family: var(--font-display);
  font-size: 1.16rem;
  line-height: 1.35;
  color: var(--mint);
  margin: 0 0 10px;
}

.page-about .about-figure {
  margin: 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--ink-2);
}

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

.page-about .about-figure .media__caption {
  padding: 12px 16px 14px;
  font-size: .8rem;
  line-height: 1.65;
  color: var(--slate);
  border-top: 1px solid var(--line);
}

/* ---------- 品牌起点 ---------- */

.page-about .about-origin {
  background: linear-gradient(180deg, transparent, rgba(16, 42, 67, .5) 22%, transparent);
}

.page-about .about-origin__grid {
  display: grid;
  gap: 28px;
}

.page-about .about-origin__say p {
  font-size: .97rem;
  line-height: 1.85;
  color: rgba(232, 237, 242, .74);
  margin: 16px 0 0;
  max-width: 58ch;
}

.page-about .about-origin__list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-origin__list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: .9rem;
  line-height: 1.6;
  color: var(--frost);
  padding: 12px 14px;
  border-radius: var(--r-md);
  background: rgba(45, 226, 230, .06);
  border: 1px solid rgba(45, 226, 230, .18);
}

.page-about .about-bullet {
  flex: 0 0 auto;
  width: 7px;
  height: 7px;
  margin-top: 7px;
  border-radius: 2px;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(45, 226, 230, .14);
}

/* ---------- 发展时间线 ---------- */

.page-about .about-track__banner {
  margin: 26px 0 30px;
}

.page-about .about-track__body {
  display: grid;
  gap: 22px;
}

.page-about .about-track__index {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding-bottom: 6px;
  scrollbar-width: thin;
}

.page-about .about-track__idx {
  flex: 0 0 auto;
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 14px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  text-decoration: none;
  color: var(--slate);
  transition: border-color .22s var(--ease), color .22s var(--ease), background-color .22s var(--ease);
}

.page-about .about-track__idx:hover,
.page-about .about-track__idx:focus-visible {
  border-color: var(--cyan);
  color: var(--mint);
  background: rgba(45, 226, 230, .1);
}

.page-about .about-track__idx-year {
  font-family: var(--font-mono);
  font-size: .88rem;
  font-variant-numeric: tabular-nums;
  letter-spacing: .04em;
}

.page-about .about-track__idx-txt {
  font-size: .76rem;
  letter-spacing: .1em;
}

.page-about .about-track__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-track__node {
  display: grid;
  gap: 12px;
  padding: 20px 18px;
  border-radius: var(--r-lg);
  background: rgba(16, 42, 67, .58);
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
  scroll-margin-top: 96px;
  transition: border-left-color .24s var(--ease), background-color .24s var(--ease);
}

.page-about .about-track__node:hover {
  border-left-color: var(--orange);
  background: rgba(16, 42, 67, .82);
}

.page-about .about-track__plate {
  font-family: var(--font-mono);
  font-size: 1.02rem;
  font-variant-numeric: tabular-nums;
  letter-spacing: .1em;
  color: var(--amber);
  margin: 0;
}

.page-about .about-track__content p {
  margin: 0;
  font-size: .93rem;
  line-height: 1.8;
  color: rgba(232, 237, 242, .74);
}

/* ---------- 档案库规模 ---------- */

.page-about .about-scale__head h2 {
  max-width: 20ch;
}

.page-about .about-scale__list {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .about-scale__item {
  padding: 20px 16px;
  border-radius: var(--r-md);
  background: linear-gradient(155deg, rgba(45, 226, 230, .16), rgba(16, 42, 67, .66));
  border: 1px solid rgba(45, 226, 230, .2);
}

.page-about .about-scale__num {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.5rem, 4vw, 2rem);
  line-height: 1.1;
  color: var(--cyan);
  letter-spacing: -.02em;
}

.page-about .about-scale__label {
  display: block;
  margin-top: 8px;
  font-size: .82rem;
  line-height: 1.5;
  color: rgba(232, 237, 242, .7);
}

.page-about .about-scale__split {
  margin-top: 30px;
  display: grid;
  gap: 22px;
}

.page-about .about-scale__col {
  padding: 22px 20px;
  border-radius: var(--r-lg);
  background: rgba(11, 27, 43, .62);
  border: 1px solid var(--line);
}

.page-about .about-scale__col p {
  margin: 0 0 14px;
  font-size: .93rem;
  line-height: 1.8;
  color: rgba(232, 237, 242, .74);
}

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

.page-about .about-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-index-list li {
  display: grid;
  gap: 4px;
  padding: 12px 0;
  border-bottom: 1px dashed rgba(232, 237, 242, .13);
}

.page-about .about-index-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-index-list__k {
  font-family: var(--font-mono);
  font-size: .82rem;
  letter-spacing: .08em;
  color: var(--orange);
}

.page-about .about-index-list__v {
  font-size: .88rem;
  line-height: 1.6;
  color: rgba(232, 237, 242, .78);
}

/* ---------- 维护团队 ---------- */

.page-about .about-team__head h2 {
  max-width: 18ch;
}

.page-about .about-team__grid {
  margin-top: 28px;
  display: grid;
  gap: 16px;
}

.page-about .about-team__card {
  background: var(--paper);
  color: var(--espresso);
  border-radius: var(--r-lg);
  padding: 22px 20px;
  border-top: 3px solid var(--orange);
  box-shadow: 0 14px 34px rgba(2, 9, 18, .34);
}

.page-about .about-team__card h3 {
  color: var(--espresso);
  margin-bottom: 10px;
}

.page-about .about-team__card p {
  margin: 0;
  font-size: .9rem;
  line-height: 1.78;
  color: rgba(26, 20, 16, .8);
}

.page-about .about-team__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--espresso);
  background: var(--amber);
  border-radius: 999px;
  padding: 4px 11px;
  margin: 0 0 14px;
}

.page-about .about-team__fig {
  margin-top: 24px;
}

/* ---------- 区域服务 ---------- */

.page-about .about-region__panel {
  display: grid;
  gap: 26px;
  padding: 26px 22px;
  border-radius: var(--r-lg);
  background: linear-gradient(140deg, rgba(255, 107, 53, .12), rgba(16, 42, 67, .72) 46%, rgba(45, 226, 230, .1));
  border: 1px solid var(--line-strong);
}

.page-about .about-region__say p {
  margin: 16px 0 0;
  font-size: .95rem;
  line-height: 1.82;
  color: rgba(232, 237, 242, .76);
  max-width: 52ch;
}

.page-about .about-region__meta {
  margin: 0;
  display: grid;
  gap: 0;
  align-content: start;
}

.page-about .about-region__row {
  display: grid;
  gap: 4px;
  padding: 13px 0;
  border-bottom: 1px solid rgba(232, 237, 242, .13);
}

.page-about .about-region__row:first-child {
  border-top: 1px solid rgba(232, 237, 242, .13);
}

.page-about .about-region__row dt {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--slate);
}

.page-about .about-region__row dd {
  margin: 0;
  font-size: .93rem;
  line-height: 1.6;
  color: var(--frost);
  word-break: break-word;
}

.page-about .about-region__row dd.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: .02em;
  color: var(--cyan);
}

/* ---------- 合作生态 ---------- */

.page-about .about-partners__head h2 {
  max-width: 20ch;
}

.page-about .about-partners__grid {
  margin-top: 28px;
  display: grid;
  gap: 16px;
}

.page-about .about-partners__group {
  position: relative;
  padding: 22px 20px 18px;
  border-radius: var(--r-lg);
  background: rgba(16, 42, 67, .56);
  border: 1px solid var(--line);
  transition: border-color .24s var(--ease), transform .24s var(--ease);
}

.page-about .about-partners__group:hover {
  border-color: rgba(45, 226, 230, .42);
  transform: translateY(-3px);
}

.page-about .about-partners__dot {
  display: block;
  width: 26px;
  height: 4px;
  border-radius: 999px;
  margin-bottom: 16px;
}

.page-about .about-partners__dot--cyan { background: var(--cyan); }
.page-about .about-partners__dot--amber { background: var(--amber); }
.page-about .about-partners__dot--orange { background: var(--orange); }

.page-about .about-partners__group p {
  margin: 0 0 12px;
  font-size: .9rem;
  line-height: 1.78;
  color: rgba(232, 237, 242, .75);
}

.page-about .about-partners__note {
  margin: 0;
  font-size: .74rem;
  letter-spacing: .12em;
  color: var(--slate);
}

/* ---------- 结尾 ---------- */

.page-about .about-next__panel {
  display: grid;
  gap: 22px;
  padding: 26px 22px;
  border-radius: var(--r-lg);
  background: var(--ink-2);
  border: 1px solid var(--line-strong);
  box-shadow: var(--shadow-lg);
}

.page-about .about-next__say p {
  margin: 14px 0 0;
  font-size: .95rem;
  line-height: 1.8;
  color: rgba(232, 237, 242, .74);
  max-width: 52ch;
}

.page-about .about-next__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-content: start;
}

.page-about .about-next__fine {
  margin: 18px 0 0;
  font-size: .82rem;
  color: var(--slate);
}

.page-about .about-next__fine a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(45, 226, 230, .45);
}

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

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-about .about-hero {
    padding: 34px 0 66px;
  }

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

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

  .page-about .about-scale__split {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }

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

  .page-about .about-region__panel {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    padding: 30px 28px;
    gap: 34px;
  }

  .page-about .about-next__panel {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    padding: 30px 28px;
  }

  .page-about .about-track__node {
    grid-template-columns: 92px minmax(0, 1fr);
    align-items: start;
    gap: 22px;
    padding: 22px 24px;
  }

  .page-about .about-track__plate {
    padding-top: 2px;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(300px, .9fr);
    gap: 46px;
    align-items: start;
    padding-top: 14px;
  }

  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    gap: 44px;
    align-items: center;
  }

  .page-about .about-track__body {
    grid-template-columns: 148px minmax(0, 1fr);
    gap: 40px;
  }

  .page-about .about-track__index {
    flex-direction: column;
    gap: 8px;
    overflow: visible;
    padding-bottom: 0;
    position: sticky;
    top: 92px;
  }

  .page-about .about-track__idx {
    justify-content: space-between;
    border-radius: var(--r-sm);
    padding: 10px 13px;
  }

  .page-about .section {
    padding: 62px 0;
  }

  .page-about .about-team__fig,
  .page-about .about-track__banner {
    margin-top: 32px;
  }
}

@media (min-width: 1200px) {
  .page-about .about-track__body {
    grid-template-columns: 168px minmax(0, 1fr);
    gap: 56px;
  }

  .page-about .about-origin__grid {
    gap: 60px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-track__node,
  .page-about .about-partners__group,
  .page-about .about-track__idx {
    transition: none;
  }

  .page-about .about-partners__group:hover {
    transform: none;
  }
}