.page-about {
  --about-gap: clamp(22px, 4vw, 40px);
  background: var(--ink);
  color: var(--snow);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-top: clamp(24px, 5vw, 48px);
  padding-bottom: clamp(40px, 7vw, 78px);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(120% 92% at 92% -12%, rgba(199, 255, 46, .14), transparent 56%),
    radial-gradient(90% 80% at -12% 112%, rgba(255, 138, 61, .10), transparent 58%),
    linear-gradient(180deg, #0A2018 0%, var(--ink) 80%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: -8%;
  width: 48%;
  height: 100%;
  background: repeating-linear-gradient(118deg, rgba(92, 225, 230, .07) 0 1px, transparent 1px 26px);
  pointer-events: none;
}

.page-about .about-hero .wrap {
  position: relative;
  z-index: 1;
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(36px, 7.2vw, 82px);
  line-height: 1.04;
  letter-spacing: .01em;
  margin: .34em 0 0;
  max-width: 17ch;
  color: var(--snow);
}

.page-about .about-hero .lede {
  margin-top: 20px;
  max-width: 64ch;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(26px, 4vw, 42px);
  background: var(--line);
  border: 1px solid var(--line);
  clip-path: var(--cut);
}

.page-about .about-stat {
  padding: 14px 16px 16px;
  background: rgba(11, 30, 22, .84);
}

.page-about .about-stat b {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(22px, 4.4vw, 32px);
  font-weight: 700;
  line-height: 1;
  color: var(--lime);
  overflow-wrap: anywhere;
}

.page-about .about-stat span {
  display: block;
  margin-top: 8px;
  font-size: 12.5px;
  letter-spacing: .07em;
  color: var(--mist);
}

.page-about .about-toc {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: clamp(28px, 5vw, 48px);
  padding-top: 18px;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-toc__label {
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--mist);
}

.page-about .about-toc__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-toc__link {
  display: inline-block;
  padding: 7px 13px;
  font-size: 13px;
  color: var(--snow);
  text-decoration: none;
  border: 1px solid var(--line);
  background: rgba(20, 43, 34, .55);
  clip-path: var(--cut-sm);
  transition: background .2s ease, color .2s ease, border-color .2s ease;
}

.page-about .about-toc__link:hover,
.page-about .about-toc__link:focus-visible,
.page-about .about-toc__link.is-active {
  color: var(--ink);
  background: var(--lime);
  border-color: var(--lime);
}

/* ---------- 起点与定位 ---------- */
.page-about .about-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
  margin-top: clamp(22px, 4vw, 38px);
}

.page-about .about-split__main p {
  margin: 0 0 16px;
  font-size: 15.5px;
  line-height: 1.68;
  color: rgba(242, 255, 247, .86);
  max-width: 66ch;
}

.page-about .about-card {
  padding: 20px 20px 22px;
  background: linear-gradient(160deg, var(--panel) 0%, var(--panel-deep) 100%);
  border: 1px solid var(--line);
  border-left: 3px solid var(--lime);
  clip-path: var(--cut);
}

.page-about .about-card--alt {
  margin-top: 14px;
  border-left-color: var(--orange);
}

.page-about .about-card__label {
  margin: 0 0 14px;
  font-size: 11.5px;
  letter-spacing: .18em;
  color: var(--mist);
}

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

.page-about .about-card__list li {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 10px;
  font-size: 14px;
  line-height: 1.55;
  color: rgba(242, 255, 247, .85);
}

.page-about .about-card__list .mono {
  font-size: 12px;
  color: var(--lime);
}

.page-about .about-card__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.62;
  color: rgba(242, 255, 247, .82);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
  margin-top: clamp(22px, 4vw, 38px);
}

.page-about .timeline {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .tl-item {
  position: relative;
  padding: 0 0 clamp(22px, 3.2vw, 30px) 30px;
  border-left: 1px solid var(--line);
  transition: background .22s ease;
}

.page-about .tl-item:last-child {
  padding-bottom: 4px;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: -6px;
  top: 6px;
  width: 11px;
  height: 11px;
  background: var(--orange);
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
  transition: background .2s ease, transform .2s ease;
}

.page-about .tl-item:first-child::before {
  background: var(--lime);
}

.page-about .tl-item:hover::before,
.page-about .tl-item:focus-within::before {
  background: var(--lime);
  transform: scale(1.3);
}

.page-about .tl-item:hover .tl-title {
  color: var(--lime);
}

.page-about .tl-year {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 0 0 8px;
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--lime);
}

.page-about .tl-ver {
  padding: 2px 7px;
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--ink);
  background: var(--orange);
  clip-path: var(--cut-sm);
}

.page-about .tl-title {
  margin: 0 0 7px;
  font-size: clamp(17px, 2.4vw, 21px);
  font-weight: 600;
  line-height: 1.4;
  color: var(--snow);
  transition: color .2s ease;
}

.page-about .tl-text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.62;
  color: var(--mist);
  max-width: 62ch;
}

/* ---------- 图片容器 ---------- */
.page-about .about-photo {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--panel-deep);
  clip-path: var(--cut-corner);
}

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

.page-about .about-photo::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(242, 255, 247, .09) 1px, transparent 1px);
  background-size: 4px 4px;
  pointer-events: none;
}

.page-about .about-photo--wide {
  margin-top: clamp(22px, 3.5vw, 34px);
}

/* ---------- 团队 ---------- */
.page-about .team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: clamp(22px, 4vw, 36px);
}

.page-about .team-card {
  position: relative;
  padding: 20px 18px 22px;
  background: linear-gradient(170deg, rgba(20, 43, 34, .94), rgba(11, 30, 22, .94));
  border: 1px solid var(--line);
  border-top: 3px solid var(--electro);
  clip-path: var(--cut);
  transition: border-color .22s ease, transform .22s ease;
}

.page-about .team-card:nth-child(2) { border-top-color: var(--lime); }
.page-about .team-card:nth-child(3) { border-top-color: var(--orange); }
.page-about .team-card:nth-child(4) { border-top-color: var(--violet); }

.page-about .team-card:hover {
  border-color: var(--line-strong);
  transform: translateY(-3px);
}

.page-about .team-card__role {
  margin: 0 0 9px;
  font-size: 11.5px;
  letter-spacing: .18em;
  color: var(--mist);
}

.page-about .team-card__title {
  margin: 0 0 10px;
  font-size: 16.5px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--snow);
}

.page-about .team-card__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
  color: rgba(242, 255, 247, .82);
}

.page-about .team-card__detail {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-size: 12.8px;
  line-height: 1.58;
  color: var(--mist);
}

/* ---------- 覆盖版图 ---------- */
.page-about .about-coverage {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
  margin-top: clamp(22px, 4vw, 38px);
}

.page-about .about-coverage__body p {
  margin: 0 0 16px;
  font-size: 15.5px;
  line-height: 1.68;
  color: rgba(242, 255, 247, .86);
  max-width: 62ch;
}

.page-about .about-region-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-mini-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 18px;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-mini-stats b {
  display: block;
  font-size: 23px;
  font-weight: 700;
  line-height: 1;
  color: var(--lime);
}

.page-about .about-mini-stats span {
  display: block;
  margin-top: 7px;
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--mist);
}

/* ---------- 合作与荣誉 ---------- */
.page-about .honor-list {
  margin: clamp(22px, 4vw, 38px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .honor-item {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 14px;
  padding: 20px 14px 22px;
  border-bottom: 1px solid var(--line);
  transition: background .22s ease;
}

.page-about .honor-item:hover {
  background: var(--lime-wash);
}

.page-about .honor-num {
  padding-top: 3px;
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--orange);
}

.page-about .honor-title {
  margin: 0 0 8px;
  font-size: clamp(16px, 2.3vw, 19px);
  font-weight: 600;
  color: var(--snow);
}

.page-about .honor-text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.64;
  color: rgba(242, 255, 247, .82);
  max-width: 80ch;
}

/* ---------- 下一步 ---------- */
.page-about .about-next-list {
  margin-top: clamp(20px, 3.5vw, 34px);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (min-width: 760px) {
  .page-about .team-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .honor-item {
    grid-template-columns: 48px minmax(0, 1fr);
    gap: 18px;
    padding: 24px 18px 26px;
  }
}

@media (min-width: 1000px) {
  .page-about .about-split {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
  }

  .page-about .about-timeline {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-coverage {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 1fr);
    align-items: stretch;
  }

  .page-about .about-coverage .about-photo {
    height: 100%;
    min-height: 320px;
  }
}

@media (min-width: 1140px) {
  .page-about .team-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .team-card:nth-child(even) {
    margin-top: 26px;
  }
}