.page-about {
  --about-rail-gap: 84px;
}

/* 面包屑 */
.page-about .about-crumbs {
  padding-top: clamp(88px, 14vw, 118px);
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-num);
  font-size: 14px;
  letter-spacing: 0.02em;
}
.page-about .about-crumbs a {
  color: var(--ink-2);
  text-decoration: none;
  transition: color 0.2s var(--ease-out);
}
.page-about .about-crumbs a:hover,
.page-about .about-crumbs a:focus-visible {
  color: var(--cyan);
}
.page-about .about-crumbs [aria-current="page"] {
  color: var(--ink);
}
.page-about .about-crumbs__sep {
  color: var(--line);
}

/* 首屏 */
.page-about .about-hero {
  padding: clamp(22px, 4vw, 42px) 0 clamp(34px, 6vw, 70px);
}
.page-about .about-hero__grid {
  display: grid;
  gap: clamp(30px, 5vw, 56px);
  align-items: center;
}
.page-about .about-hero h1 {
  font-family: var(--font-head);
  font-size: clamp(34px, 6.2vw, 60px);
  font-weight: 800;
  line-height: 1.07;
  letter-spacing: -0.025em;
  margin: 14px 0 0;
  color: var(--ink);
}
.page-about .about-hero__lede {
  margin: 22px 0 0;
  max-width: 40ch;
  color: var(--ink-2);
}
.page-about .about-hero__actions {
  margin-top: clamp(26px, 4vw, 34px);
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* 首屏环形视觉 */
.page-about .about-orbit {
  position: relative;
  border-radius: var(--radius-panel);
  padding: clamp(20px, 4vw, 30px);
  display: grid;
  place-items: center;
  overflow: hidden;
}
.page-about .about-orbit::before {
  content: "";
  position: absolute;
  inset: -30%;
  background: radial-gradient(circle at 50% 50%, rgba(43, 232, 200, 0.18), transparent 62%);
  pointer-events: none;
}
.page-about .about-orbit svg {
  position: relative;
  width: min(100%, 300px);
  height: auto;
  display: block;
}
.page-about .about-orbit__core {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 4px;
  text-align: center;
  pointer-events: none;
}
.page-about .about-orbit__cap {
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--ink-2);
}
.page-about .about-orbit__year {
  font-size: clamp(40px, 7vw, 62px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  text-shadow: 0 0 26px rgba(43, 232, 200, 0.4);
}
.page-about .about-orbit__sub {
  font-size: 12px;
  color: var(--ink-2);
  max-width: 16ch;
  line-height: 1.55;
}

.page-about .about-hero__stats {
  list-style: none;
  margin: clamp(18px, 3vw, 24px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(88px, 1fr));
  gap: clamp(10px, 2vw, 16px);
}
.page-about .about-hero__stats .stat {
  background: var(--glass);
  border: 1px solid var(--stroke);
  border-radius: var(--radius-soft);
  padding: 14px 12px;
  display: grid;
  gap: 4px;
}
.page-about .about-hero__stats .stat-num {
  font-family: var(--font-num);
  font-size: clamp(24px, 3.6vw, 32px);
  font-weight: 700;
  line-height: 1;
  color: var(--ink);
}
.page-about .about-hero__stats .stat-label {
  font-size: 12.5px;
  color: var(--ink-2);
  line-height: 1.5;
}

/* 竖向时间轨 */
.page-about .about-track {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 36px);
}
.page-about .about-rail {
  display: none;
}
.page-about .about-node__body {
  padding: clamp(22px, 3.6vw, 40px);
}
.page-about .about-node h2 {
  font-family: var(--font-head);
  font-size: clamp(24px, 3.4vw, 36px);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.02em;
  margin: 12px 0 0;
  color: var(--ink);
}
.page-about .about-node__lede {
  color: var(--ink-2);
  margin: 16px 0 0;
  max-width: 46ch;
  line-height: 1.75;
}
.page-about .about-node__foot {
  margin: clamp(20px, 3vw, 26px) 0 0;
  font-size: 14.5px;
  color: var(--ink-2);
}
.page-about .about-node__foot a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 232, 200, 0.4);
  padding-bottom: 1px;
}
.page-about .about-node__foot a:hover {
  border-bottom-color: var(--cyan);
}
.page-about .about-node .prose p {
  color: var(--ink-2);
}

/* 版本折叠组 */
.page-about .about-versions {
  margin-top: clamp(20px, 3vw, 30px);
  display: grid;
  gap: 10px;
}
.page-about .about-ver {
  border-radius: var(--radius-soft);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--line);
  overflow: hidden;
  transition: border-color 0.24s var(--ease-out), background 0.24s var(--ease-out);
}
.page-about .about-ver[open] {
  border-color: rgba(43, 232, 200, 0.42);
  background: rgba(43, 232, 200, 0.05);
}
.page-about .about-ver > summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  font-family: var(--font-head);
  font-weight: 700;
  transition: background 0.2s var(--ease-out);
}
.page-about .about-ver > summary:hover {
  background: rgba(255, 255, 255, 0.03);
}
.page-about .about-ver > summary::-webkit-details-marker {
  display: none;
}
.page-about .about-ver > summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -3px;
}
.page-about .about-ver__year {
  font-size: 15px;
  letter-spacing: 0.04em;
  color: var(--cyan);
  flex: none;
}
.page-about .about-ver[open] .about-ver__year {
  color: var(--gold);
}
.page-about .about-ver__name {
  font-size: 16px;
  color: var(--ink);
}
.page-about .about-ver__toggle {
  position: relative;
  margin-left: auto;
  width: 14px;
  height: 14px;
  flex: none;
}
.page-about .about-ver__toggle::before,
.page-about .about-ver__toggle::after {
  content: "";
  position: absolute;
  background: var(--ink-2);
  border-radius: 2px;
  transition: transform 0.24s var(--ease-out), background 0.24s var(--ease-out);
}
.page-about .about-ver__toggle::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 2px;
}
.page-about .about-ver__toggle::after {
  left: 6px;
  top: 0;
  width: 2px;
  height: 14px;
}
.page-about .about-ver[open] .about-ver__toggle::before {
  background: var(--cyan);
}
.page-about .about-ver[open] .about-ver__toggle::after {
  transform: rotate(90deg);
}
.page-about .about-ver .disclosure-body {
  padding: 0 18px 18px;
}
.page-about .about-ver .disclosure-body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink-2);
  max-width: 54ch;
}

/* 团队与时区 */
.page-about .about-team__grid {
  margin-top: clamp(20px, 3vw, 30px);
  display: grid;
  gap: clamp(18px, 3vw, 30px);
}
.page-about .about-team__figure {
  margin: 0;
}
.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.page-about .about-team__copy p {
  margin: 0 0 20px;
  color: var(--ink-2);
  line-height: 1.78;
}
.page-about .about-zones {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}
.page-about .about-zone {
  display: grid;
  grid-template-columns: 60px minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
}
.page-about .about-zone__name {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 14px;
  color: var(--ink);
}
.page-about .about-zone__bar {
  position: relative;
  height: 8px;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.07);
  overflow: hidden;
}
.page-about .about-zone__bar::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: var(--w, 60%);
  border-radius: var(--radius-pill);
  background: linear-gradient(90deg, var(--cyan), var(--violet));
}
.page-about .about-zone.is-eu { --w: 94%; }
.page-about .about-zone.is-sa { --w: 74%; }
.page-about .about-zone.is-asia { --w: 62%; }
.page-about .about-zone__meta {
  font-size: 12px;
  color: var(--ink-2);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

/* 资质 */
.page-about .about-certs {
  list-style: none;
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.page-about .about-certs li {
  border: 1px solid var(--line);
  border-radius: var(--radius-soft);
  padding: 18px 20px;
  display: grid;
  gap: 6px;
  background: linear-gradient(135deg, rgba(43, 232, 200, 0.08), rgba(124, 92, 255, 0.05));
}
.page-about .about-certs__num {
  font-family: var(--font-num);
  font-size: 18px;
  font-weight: 700;
  color: var(--cyan);
}
.page-about .about-certs li:last-child .about-certs__num {
  color: var(--gold);
}
.page-about .about-certs__label {
  font-size: 14px;
  color: var(--ink-2);
}

/* 合作生态与年鉴 */
.page-about .about-eco__grid {
  margin-top: clamp(20px, 3vw, 30px);
  display: grid;
  gap: clamp(22px, 3vw, 34px);
}
.page-about .about-eco__copy p {
  margin: 0 0 16px;
  color: var(--ink-2);
  line-height: 1.78;
}
.page-about .about-link {
  display: inline-block;
  margin-top: 6px;
  font-size: 14.5px;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 232, 200, 0.4);
  padding-bottom: 1px;
}
.page-about .about-link:hover {
  border-bottom-color: var(--cyan);
}
.page-about .about-eco__visual {
  display: flex;
  justify-content: center;
}
.page-about .about-almanac {
  position: relative;
  width: min(100%, 230px);
  aspect-ratio: 3 / 4;
  margin: 8px 18px 18px 0;
}
.page-about .about-almanac__layer {
  position: absolute;
  inset: 0;
  border-radius: 14px;
  border: 1px solid var(--stroke);
}
.page-about .about-almanac__layer--3 {
  transform: translate(16px, 16px) rotate(3.2deg);
  background: rgba(255, 255, 255, 0.05);
}
.page-about .about-almanac__layer--2 {
  transform: translate(8px, 8px) rotate(1.6deg);
  background: rgba(255, 255, 255, 0.08);
}
.page-about .about-almanac__layer--1 {
  background: linear-gradient(160deg, #16224c, #0b1330 62%);
  box-shadow: var(--shadow-panel);
}
.page-about .about-almanac__face {
  position: absolute;
  inset: 0;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid rgba(43, 232, 200, 0.34);
  display: grid;
  align-content: end;
  gap: 6px;
  padding: 20px;
}
.page-about .about-almanac__face::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(115deg, rgba(43, 232, 200, 0.14) 0 1px, transparent 1px 14px);
  opacity: 0.7;
  pointer-events: none;
}
.page-about .about-almanac__year {
  position: relative;
  font-size: clamp(34px, 5vw, 44px);
  font-weight: 700;
  line-height: 1;
  color: var(--gold);
}
.page-about .about-almanac__title {
  position: relative;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 15px;
  color: var(--ink);
}
.page-about .about-eco__figure {
  margin: clamp(24px, 3.5vw, 34px) 0 0;
}
.page-about .about-eco__figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 服务节奏 */
.page-about .about-promise {
  margin-top: clamp(20px, 3vw, 28px);
  display: grid;
  gap: 14px;
}
.page-about .about-promise > div {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 16px 20px;
  border-radius: var(--radius-soft);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
}
.page-about .about-promise .num {
  font-family: var(--font-num);
  font-size: clamp(28px, 4vw, 36px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  flex: none;
}
.page-about .about-promise > div:last-child .num {
  color: var(--gold);
}
.page-about .about-promise__label {
  font-size: 14.5px;
  color: var(--ink-2);
  line-height: 1.6;
}

/* 覆盖版图：横向满宽带 */
.page-about .about-map {
  position: relative;
  margin: clamp(28px, 5vw, 56px) 0;
  padding: clamp(40px, 7vw, 82px) 0;
  background:
    radial-gradient(900px 340px at 10% 0%, rgba(43, 232, 200, 0.13), transparent 70%),
    radial-gradient(700px 300px at 92% 100%, rgba(124, 92, 255, 0.14), transparent 72%),
    linear-gradient(180deg, var(--panel), rgba(7, 11, 31, 0.2));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.page-about .about-map::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(115deg, rgba(255, 255, 255, 0.03) 0 1px, transparent 1px 18px);
  pointer-events: none;
}
.page-about .about-map__inner {
  position: relative;
  z-index: 1;
}
.page-about .about-map__head h2 {
  font-family: var(--font-head);
  font-size: clamp(26px, 4vw, 42px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.022em;
  margin: 12px 0 0;
  color: var(--ink);
}
.page-about .about-map__head .lead {
  margin-top: 16px;
  max-width: 52ch;
  color: var(--ink-2);
}
.page-about .about-map__body {
  margin-top: clamp(26px, 4vw, 44px);
  display: grid;
  gap: clamp(26px, 4vw, 46px);
}
.page-about .about-dial {
  display: grid;
  gap: 18px;
  justify-items: center;
}
.page-about .about-dial svg {
  width: 100%;
  max-width: 460px;
  height: auto;
  display: block;
}
.page-about .about-dial__num {
  font-family: var(--font-num);
  font-size: 52px;
  font-weight: 700;
  fill: var(--cyan);
}
.page-about .about-dial__cap {
  font-family: var(--font-body);
  font-size: 14px;
  fill: var(--ink-2);
}
.page-about .about-dial__legend {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px 20px;
  font-size: 14px;
  color: var(--ink-2);
}
.page-about .about-dial__legend li {
  display: flex;
  align-items: center;
  gap: 8px;
}
.page-about .about-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex: none;
}
.page-about .about-dot--cyan { background: var(--cyan); }
.page-about .about-dot--violet { background: var(--violet); }
.page-about .about-dot--mint { background: rgba(43, 232, 200, 0.42); }

.page-about .about-map__facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}
.page-about .about-map__facts li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}
.page-about .about-map__facts li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}
.page-about .about-map__fact-num {
  font-family: var(--font-num);
  font-size: clamp(26px, 3.6vw, 38px);
  font-weight: 700;
  line-height: 1;
  color: var(--ink);
  white-space: nowrap;
}
.page-about .about-map__facts li:nth-child(2) .about-map__fact-num {
  color: var(--cyan);
}
.page-about .about-map__facts li:nth-child(3) .about-map__fact-num {
  color: var(--gold);
}
.page-about .about-map__fact-label {
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--ink-2);
}
.page-about .about-map__figure {
  margin: clamp(28px, 4vw, 48px) 0 0;
}
.page-about .about-map__figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 桌面时间轨与栅格 */
@media (min-width: 820px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }
  .page-about .about-eco__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }
  .page-about .about-certs {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-promise {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-track {
    grid-template-columns: var(--about-rail-gap) minmax(0, 1fr);
    column-gap: clamp(20px, 3vw, 34px);
  }
  .page-about .about-rail {
    display: block;
    grid-column: 1;
    grid-row: 1 / -1;
  }
  .page-about .about-rail__line {
    position: sticky;
    top: 148px;
    display: block;
    width: 2px;
    height: min(52vh, 420px);
    margin-left: 10px;
    border-radius: 2px;
    background: linear-gradient(180deg, var(--cyan), var(--violet) 52%, var(--gold));
    box-shadow: 0 0 24px rgba(43, 232, 200, 0.32);
  }
  .page-about .about-node {
    grid-column: 2;
  }
  .page-about .about-map__body {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    align-items: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-ver,
  .page-about .about-ver__toggle::before,
  .page-about .about-ver__toggle::after,
  .page-about .about-zone__bar::after,
  .page-about .about-crumbs a {
    transition: none;
  }
}
</final>