.page-about {
  --about-hair: rgba(122, 140, 163, .22);
  --about-hair-soft: rgba(122, 140, 163, .12);
  --about-scan: repeating-linear-gradient(0deg, rgba(245, 241, 232, .03) 0 1px, transparent 1px 5px);
  background: var(--ink);
  color: var(--paper);
  overflow-x: hidden;
}

/* ---------- 首屏分屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background:
    radial-gradient(120% 85% at 6% 0%, rgba(27, 16, 53, .95) 0%, rgba(11, 11, 16, 0) 62%),
    radial-gradient(95% 80% at 100% 8%, rgba(14, 26, 43, .92) 0%, rgba(11, 11, 16, 0) 58%),
    var(--ink);
  border-bottom: 1px solid var(--about-hair-soft);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--about-scan);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  padding-top: clamp(24px, 4vw, 40px);
  padding-bottom: clamp(48px, 7vw, 88px);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 60px);
  align-items: end;
  margin-top: clamp(20px, 4vw, 44px);
}

.page-about .about-hero__title {
  margin: 12px 0 20px;
  font-size: clamp(34px, 8.4vw, 76px);
  font-weight: 300;
  line-height: 1.12;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-about .about-hero__copy .lede {
  max-width: 46ch;
  margin-bottom: 28px;
  color: rgba(245, 241, 232, .82);
}

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
  aspect-ratio: 5 / 7;
  background: linear-gradient(160deg, rgba(27, 16, 53, .95), rgba(14, 26, 43, .78));
  border: 1px solid var(--about-hair);
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
}

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

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: clamp(36px, 5vw, 64px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--about-hair-soft);
  border: 1px solid var(--about-hair-soft);
}

.page-about .about-hero__stats li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 20px;
  background: rgba(11, 11, 16, .72);
}

.page-about .about-hero__num {
  font-size: clamp(24px, 4vw, 32px);
  color: var(--gold);
  letter-spacing: .02em;
}

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

/* ---------- 使命 ---------- */
.page-about .about-mission__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 56px);
  align-items: start;
}

.page-about .about-mission__text p {
  color: rgba(245, 241, 232, .82);
}

.page-about .about-mission__figure {
  margin: 0;
  background: linear-gradient(200deg, rgba(14, 26, 43, .85), rgba(27, 16, 53, .7));
  border: 1px solid var(--about-hair);
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% 100%, var(--cut) 100%, 0 calc(100% - var(--cut)));
}

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

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  border-top: 1px solid var(--about-hair-soft);
  background:
    radial-gradient(80% 60% at 100% 0%, rgba(14, 26, 43, .75) 0%, rgba(11, 11, 16, 0) 60%),
    var(--ink);
}

.page-about .about-timeline__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(32px, 5vw, 64px);
  align-items: start;
}

.page-about .about-filter {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 24px 0 28px;
}

.page-about .about-filter__btn {
  appearance: none;
  padding: 8px 14px;
  font: inherit;
  font-size: 14px;
  color: var(--paper);
  background: rgba(42, 42, 53, .55);
  border: 1px solid var(--about-hair);
  cursor: pointer;
  transition: color .25s var(--ease), border-color .25s var(--ease), background .25s var(--ease);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
}

.page-about .about-filter__btn:hover,
.page-about .about-filter__btn:focus-visible {
  border-color: var(--line-gold);
  color: var(--gold-soft);
  outline: none;
}

.page-about .about-filter__count {
  margin-left: auto;
  font-size: 13px;
  color: var(--slate);
}

.page-about .about-timeline__figure {
  margin: 0 0 34px;
  background: linear-gradient(120deg, rgba(27, 16, 53, .8), rgba(14, 26, 43, .6));
  border: 1px solid var(--about-hair);
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
}

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

.page-about .tl {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 14px;
  bottom: 22px;
  width: 1px;
  background: linear-gradient(180deg, rgba(212, 162, 76, .55), rgba(122, 140, 163, .16));
}

.page-about .tl__item {
  position: relative;
  padding: 0 0 32px 36px;
  transition: transform .35s var(--ease);
}

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 15px;
  height: 15px;
  background: var(--ink);
  border: 1px solid var(--gold);
  transform: rotate(45deg);
  transition: background .3s var(--ease), box-shadow .3s var(--ease);
}

.page-about .tl__item:hover::before,
.page-about .tl__item:focus-within::before {
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(212, 162, 76, .16);
}

.page-about .tl__meta {
  margin: 0 0 6px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--gold);
}

.page-about .tl__title {
  margin: 0 0 8px;
  font-size: 20px;
  font-weight: 600;
  color: var(--paper);
}

.page-about .tl__item p {
  margin: 0;
  color: rgba(245, 241, 232, .78);
}

/* ---------- 时间线侧栏 ---------- */
.page-about .about-timeline__aside {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.page-about .about-aside__card {
  padding: 24px 22px;
  background: linear-gradient(165deg, rgba(27, 16, 53, .92), rgba(14, 26, 43, .8));
  border: 1px solid var(--about-hair);
}

.page-about .about-aside__label {
  margin: 0 0 6px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--slate);
}

.page-about .about-aside__version {
  margin: 0 0 12px;
  font-size: 40px;
  line-height: 1;
  color: var(--gold);
}

.page-about .about-aside__note {
  margin: 0 0 16px;
  font-size: 15px;
  color: rgba(245, 241, 232, .8);
}

.page-about .about-aside__link {
  display: inline-block;
  font-size: 14px;
  color: var(--celadon);
  text-decoration: none;
  border-bottom: 1px solid rgba(79, 209, 178, .4);
  padding-bottom: 2px;
}

.page-about .about-aside__link:hover {
  color: var(--gold-soft);
  border-bottom-color: var(--line-gold);
}

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

.page-about .about-aside__quote {
  margin: 0;
  padding-left: 16px;
  border-left: 2px solid var(--line-gold);
  font-size: 16px;
  color: var(--gold-soft);
}

/* ---------- 服务人群 ---------- */
.page-about .about-people {
  border-top: 1px solid var(--about-hair-soft);
}

.page-about .about-people__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin-top: 32px;
}

.page-about .about-person {
  padding: 24px 22px;
  background: rgba(42, 42, 53, .42);
  border: 1px solid var(--about-hair);
  transition: border-color .3s var(--ease), transform .3s var(--ease);
}

.page-about .about-person:hover {
  border-color: var(--line-gold);
  transform: translateY(-3px);
}

.page-about .about-person__idx {
  margin: 0 0 10px;
  font-size: 30px;
  line-height: 1;
  color: var(--gold-soft);
}

.page-about .about-person__name {
  margin: 0 0 10px;
  font-size: 18px;
  color: var(--paper);
}

.page-about .about-person p {
  margin: 0 0 16px;
  font-size: 15px;
  color: rgba(245, 241, 232, .78);
}

.page-about .about-person__link {
  font-size: 14px;
  color: var(--coral);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 107, 74, .45);
  padding-bottom: 2px;
}

.page-about .about-person__link:hover {
  color: var(--gold-soft);
  border-bottom-color: var(--line-gold);
}

/* ---------- 信息组织原则 ---------- */
.page-about .about-principles {
  border-top: 1px solid var(--about-hair-soft);
  background:
    radial-gradient(70% 70% at 0% 100%, rgba(14, 26, 43, .8) 0%, rgba(11, 11, 16, 0) 62%),
    var(--ink);
}

.page-about .about-principles__head .lede {
  max-width: 52ch;
  color: rgba(245, 241, 232, .8);
}

.page-about .about-principles__list {
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--about-hair-soft);
  border: 1px solid var(--about-hair-soft);
}

.page-about .about-principle {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  padding: 22px 20px;
  background: rgba(11, 11, 16, .82);
}

.page-about .about-principle__num {
  font-size: 22px;
  line-height: 1.3;
  color: var(--gold);
}

.page-about .about-principle h3 {
  margin: 0 0 8px;
  font-size: 17px;
  color: var(--paper);
}

.page-about .about-principle p {
  margin: 0;
  font-size: 15px;
  color: rgba(245, 241, 232, .76);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  border-top: 1px solid var(--about-hair-soft);
}

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

.page-about .about-team__text p {
  color: rgba(245, 241, 232, .8);
}

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

.page-about .about-team__flow li {
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--about-hair);
  font-size: 15px;
  color: rgba(245, 241, 232, .84);
}

.page-about .about-team__flow .mono {
  font-size: 13px;
  color: var(--celadon);
}

.page-about .about-team__stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 0;
  background: var(--about-hair-soft);
  border: 1px solid var(--about-hair-soft);
}

.page-about .about-team__stats > div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 18px;
  background: rgba(27, 16, 53, .55);
}

.page-about .about-team__stats dt {
  font-size: 14px;
  color: var(--slate);
}

.page-about .about-team__stats dd {
  margin: 0;
  font-size: 17px;
  color: var(--gold-soft);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta__panel {
  padding: clamp(28px, 5vw, 52px) clamp(22px, 4vw, 48px);
  background:
    radial-gradient(90% 140% at 100% 0%, rgba(27, 16, 53, .9) 0%, rgba(11, 11, 16, 0) 62%),
    linear-gradient(140deg, rgba(14, 26, 43, .9), rgba(42, 42, 53, .5));
  border: 1px solid var(--about-hair);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
}

.page-about .about-cta__panel p {
  max-width: 54ch;
  margin-bottom: 24px;
  color: rgba(245, 241, 232, .82);
}

/* ---------- 响应式 ---------- */
@media (min-width: 600px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(3, 1fr);
  }

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

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

  .page-about .about-principle {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
  }

  .page-about .about-hero__figure {
    aspect-ratio: 5 / 6;
  }

  .page-about .about-mission__grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, .75fr);
  }

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

@media (min-width: 1024px) {
  .page-about .about-timeline__grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(280px, .82fr);
  }

  .page-about .about-timeline__aside {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .about-person,
  .page-about .tl__item,
  .page-about .about-filter__btn {
    transition: none;
  }

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