.page-about {
  --tl-scale: 150px;
  --about-pad: clamp(20px, 3vw, 30px);
}

/* 面包屑 */
.page-about .breadcrumb {
  margin-top: 22px;
  font-size: 14px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: clamp(28px, 5vw, 64px);
}

.page-about .about-hero__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 56px);
  align-items: center;
}

.page-about .about-hero__copy .h1 {
  margin-top: 14px;
  max-width: 20ch;
}

.page-about .about-hero__copy .lede {
  margin-top: 20px;
  max-width: 56ch;
}

.page-about .about-hero__actions {
  margin-top: 30px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-hero__panel {
  position: relative;
  aspect-ratio: 4 / 3;
  border-radius: var(--r-xl);
  border: 1px solid var(--line);
  overflow: hidden;
  background:
    radial-gradient(120% 90% at 82% 8%, rgba(124, 77, 255, .30), transparent 62%),
    radial-gradient(95% 85% at 8% 92%, rgba(34, 224, 214, .20), transparent 64%),
    var(--midnight);
  box-shadow: var(--shadow-1);
}

.page-about .about-hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(to right, rgba(42, 58, 107, .70) 0 1px, transparent 1px 46px),
    repeating-linear-gradient(to bottom, rgba(42, 58, 107, .70) 0 1px, transparent 1px 46px);
  opacity: .8;
}

.page-about .about-hero__scan {
  position: absolute;
  left: 0;
  right: 0;
  top: 32%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
  box-shadow: 0 0 26px rgba(34, 224, 214, .65);
}

.page-about .about-hero__ticks {
  position: absolute;
  right: 22px;
  bottom: 22px;
  width: 46%;
  height: 38%;
  border-left: 1px solid rgba(124, 77, 255, .75);
  border-bottom: 1px solid rgba(124, 77, 255, .75);
  background:
    linear-gradient(180deg, rgba(34, 224, 214, .00), rgba(34, 224, 214, .35)),
    repeating-linear-gradient(to right, rgba(34, 224, 214, .45) 0 3px, transparent 3px 13px);
  background-repeat: no-repeat;
  background-size: 100% 100%, 100% 46%;
  background-position: left bottom, left bottom;
}

/* ---------- 时间轴章节 ---------- */
.page-about .about-track__intro {
  margin-top: 16px;
  max-width: 62ch;
  color: var(--mist);
}

.page-about .about-track__figure {
  margin-top: clamp(28px, 4vw, 44px);
}

.page-about .about-timeline {
  margin-top: clamp(36px, 5vw, 60px);
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.page-about .about-timeline__scale {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 8px;
  scrollbar-width: thin;
}

.page-about .about-timeline__scale .toc-link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  flex: 0 0 auto;
  padding: 9px 14px;
  border-radius: var(--r-sm);
  border: 1px solid var(--line);
  background: rgba(22, 34, 74, .45);
  color: var(--mist);
  font-size: 14px;
  text-decoration: none;
  white-space: nowrap;
  transition: color .24s var(--ease), border-color .24s var(--ease), background .24s var(--ease);
}

.page-about .about-timeline__scale .toc-link:hover {
  color: var(--ice);
  border-color: rgba(124, 77, 255, .7);
}

.page-about .about-timeline__scale .toc-link[aria-current] {
  color: var(--ice);
  border-color: var(--cyan);
  background: rgba(34, 224, 214, .12);
}

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

.page-about .about-timeline__track {
  border-left: 1px solid var(--line);
  padding-left: 30px;
}

.page-about .about-timeline__item {
  position: relative;
  padding-bottom: 46px;
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -37px;
  top: 8px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--deep);
  border: 2px solid var(--violet);
}

.page-about .about-timeline__item--current::before {
  border-color: var(--cyan);
  background: var(--cyan);
  box-shadow: 0 0 0 6px rgba(34, 224, 214, .16);
}

.page-about .about-timeline__stage {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--mist);
  text-transform: uppercase;
}

.page-about .about-timeline__item .h3 {
  margin-top: 12px;
}

.page-about .about-timeline__item > p:not(.about-timeline__stage):not(.about-timeline__meter) {
  margin-top: 12px;
  max-width: 64ch;
  color: var(--mist);
  line-height: 1.75;
}

.page-about .about-timeline__meter {
  margin-top: 18px;
  height: 4px;
  border-radius: 999px;
  background: rgba(42, 58, 107, .60);
  overflow: hidden;
}

.page-about .about-timeline__meter i {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--violet), var(--cyan));
}

.page-about .about-timeline__item:nth-child(1) .about-timeline__meter i { width: 30%; }
.page-about .about-timeline__item:nth-child(2) .about-timeline__meter i { width: 46%; }
.page-about .about-timeline__item:nth-child(3) .about-timeline__meter i { width: 62%; }
.page-about .about-timeline__item:nth-child(4) .about-timeline__meter i { width: 80%; }
.page-about .about-timeline__item:nth-child(5) .about-timeline__meter i { width: 100%; }

/* ---------- 认证章节 ---------- */
.page-about .about-cert__grid {
  align-items: start;
}

.page-about .about-cert__main {
  padding: var(--about-pad);
}

.page-about .about-cert__main .h2 {
  margin-top: 12px;
}

.page-about .about-cert__main > p {
  margin-top: 16px;
  max-width: 60ch;
  color: var(--mist);
  line-height: 1.75;
}

.page-about .about-cert__list {
  margin-top: 28px;
  display: grid;
  gap: 14px;
  list-style: none;
  padding: 0;
}

.page-about .about-cert__item {
  padding: 18px 20px;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  border-left: 3px solid var(--violet);
  background: rgba(7, 11, 26, .45);
}

.page-about .about-cert__item:first-child {
  border-left-color: var(--cyan);
}

.page-about .about-cert__label {
  display: block;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--mist);
}

.page-about .about-cert__value {
  display: block;
  margin-top: 6px;
  font-size: 24px;
  color: var(--ice);
}

.page-about .about-cert__item .about-cert__note {
  margin-top: 8px;
  font-size: 14px;
  color: var(--mist);
  line-height: 1.7;
}

.page-about .about-cert__aside {
  padding: var(--about-pad);
}

.page-about .about-cert__asideList {
  margin-top: 18px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-about .about-cert__asideList li {
  position: relative;
  padding-left: 18px;
  color: var(--mist);
  line-height: 1.7;
}

.page-about .about-cert__asideList li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .65em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
}

.page-about .about-cert__honor {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  font-size: 14px;
  color: var(--mist);
  line-height: 1.7;
}

/* ---------- 六栏 ---------- */
.page-about .about-cols {
  margin-top: clamp(26px, 4vw, 42px);
  align-items: start;
}

.page-about .about-col {
  padding: 22px;
  transition: transform .26s var(--ease), border-color .26s var(--ease);
}

.page-about .about-col:hover {
  transform: translateY(-4px);
  border-color: rgba(34, 224, 214, .45);
}

.page-about .about-col--lead {
  border-left: 3px solid var(--cyan);
}

.page-about .about-col__idx {
  font-size: 13px;
  color: var(--violet);
}

.page-about .about-col .h4 {
  margin-top: 10px;
}

.page-about .about-col p:not(.about-col__idx) {
  margin-top: 10px;
  font-size: 15px;
  color: var(--mist);
  line-height: 1.7;
}

.page-about .about-cols__foot {
  margin-top: 28px;
  font-size: 15px;
  color: var(--mist);
}

.page-about .about-cols__foot a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 224, 214, .45);
}

/* ---------- 团队 ---------- */
.page-about .about-roles {
  margin-top: clamp(26px, 4vw, 40px);
}

.page-about .about-roles__bar {
  display: flex;
  gap: 4px;
  height: 12px;
  border-radius: 999px;
  overflow: hidden;
}

.page-about .about-roles__bar span {
  display: block;
  height: 100%;
}

.page-about .about-roles__bar span:nth-child(1) { flex: 7; background: var(--cyan); }
.page-about .about-roles__bar span:nth-child(2) { flex: 5; background: var(--violet); }
.page-about .about-roles__bar span:nth-child(3) { flex: 4; background: rgba(168, 182, 217, .75); }
.page-about .about-roles__bar span:nth-child(4) { flex: 2; background: var(--orange); }

.page-about .about-roles__cards {
  margin-top: 22px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .about-role {
  padding: 20px;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: rgba(22, 34, 74, .48);
  transition: border-color .26s var(--ease), transform .26s var(--ease), background .26s var(--ease);
}

.page-about .about-role:hover,
.page-about .about-role:focus-within {
  border-color: rgba(34, 224, 214, .50);
  background: rgba(22, 34, 74, .78);
  transform: translateY(-4px);
}

.page-about .about-role__name {
  font-size: 17px;
  color: var(--ice);
  font-weight: 600;
}

.page-about .about-role__num {
  margin-top: 4px;
  font-size: 26px;
  color: var(--cyan);
}

.page-about .about-role__note {
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
  transition: color .26s var(--ease);
}

.page-about .about-role:hover .about-role__note {
  color: var(--ice);
}

.page-about .about-team__figure {
  margin-top: clamp(32px, 5vw, 52px);
}

/* ---------- 重庆 ---------- */
.page-about .about-cq__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 48px);
  align-items: center;
}

.page-about .about-cq__text .h2 {
  margin-top: 12px;
}

.page-about .about-cq__text > p {
  margin-top: 16px;
  max-width: 62ch;
  color: var(--mist);
  line-height: 1.78;
}

.page-about .about-cq__addr {
  display: inline-block;
  margin-top: 22px;
  padding: 10px 16px;
  border-radius: var(--r-sm);
  border: 1px dashed var(--line);
  color: var(--ice);
  font-size: 14px;
}

.page-about .about-cq__figure {
  margin: 0;
  border-radius: var(--r-xl);
  border: 1px solid var(--line);
  overflow: hidden;
  background: var(--midnight);
}

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

.page-about .about-cq__figure .media-frame__caption {
  padding: 12px 18px;
  font-size: 13px;
  color: var(--mist);
}

/* ---------- 里程碑 ---------- */
.page-about .about-miles {
  margin-top: clamp(26px, 4vw, 40px);
  display: flex;
  gap: 16px;
  overflow-x: auto;
  padding-bottom: 16px;
  scroll-snap-type: x mandatory;
}

.page-about .about-mile {
  flex: 0 0 78%;
  scroll-snap-align: start;
  padding: 22px;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: rgba(14, 22, 48, .70);
}

.page-about .about-mile__num {
  font-size: 13px;
  color: var(--violet);
}

.page-about .about-mile .h4 {
  margin-top: 10px;
}

.page-about .about-mile p:not(.about-mile__num) {
  margin-top: 10px;
  font-size: 14px;
  color: var(--mist);
  line-height: 1.7;
}

/* ---------- 下一步 ---------- */
.page-about .about-next__inner {
  padding: var(--about-pad);
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.page-about .about-next__lead .h3 {
  margin-top: 10px;
}

.page-about .about-next__lead p:not(.eyebrow) {
  margin-top: 12px;
  color: var(--mist);
  max-width: 44ch;
}

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

.page-about .about-next__item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 18px;
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: rgba(7, 11, 26, .45);
  text-decoration: none;
  transition: border-color .24s var(--ease), transform .24s var(--ease), background .24s var(--ease);
}

.page-about .about-next__item:hover {
  border-color: var(--cyan);
  background: rgba(34, 224, 214, .08);
  transform: translateY(-3px);
}

.page-about .about-next__label {
  color: var(--ice);
  font-size: 16px;
  font-weight: 600;
}

.page-about .about-next__hint {
  color: var(--mist);
  font-size: 13px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-roles__cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-mile {
    flex: 0 0 44%;
  }

  .page-about .about-next__inner {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }

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

@media (min-width: 900px) {
  .page-about .about-timeline {
    grid-template-columns: var(--tl-scale) minmax(0, 1fr);
    gap: 48px;
  }

  .page-about .about-timeline__scale {
    flex-direction: column;
    gap: 6px;
    overflow: visible;
    padding-bottom: 0;
    position: sticky;
    top: calc(var(--cert-h) + 28px);
    align-self: start;
  }

  .page-about .about-timeline__scale .toc-link {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
    border: 0;
    border-left: 2px solid var(--line);
    border-radius: 0;
    background: transparent;
    padding: 10px 12px;
  }

  .page-about .about-timeline__scale .toc-link[aria-current] {
    background: rgba(34, 224, 214, .10);
  }

  .page-about .about-timeline__scale .toc-link .mono {
    font-size: 18px;
  }

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

  .page-about .about-miles {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-mile {
    flex: none;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

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

  .page-about .about-cq__text {
    padding-right: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-col,
  .page-about .about-role,
  .page-about .about-next__item,
  .page-about .about-timeline__scale .toc-link,
  .page-about .about-role__note {
    transition: none;
  }

  .page-about .about-col:hover,
  .page-about .about-role:hover,
  .page-about .about-next__item:hover {
    transform: none;
  }
}