.page-about {
  --about-gap: clamp(18px, 3.4vw, 44px);
  --about-rail: 132px;
  --about-body: 66ch;
  background: var(--ink-900);
  color: var(--text);
  overflow-x: hidden;
}

.page-about h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 4.4vw, 44px);
  line-height: 1.14;
  letter-spacing: -.01em;
  margin: 12px 0 0;
  color: var(--white);
}

.page-about h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(19px, 2.6vw, 25px);
  line-height: 1.3;
  margin: 0 0 8px;
  color: var(--text);
}

.page-about p {
  margin: 14px 0 0;
  line-height: 1.85;
  color: var(--muted);
  max-width: var(--about-body);
}

.page-about .about-crumb {
  padding-top: clamp(16px, 2.4vw, 26px);
}

.page-about .about-crumb .breadcrumb {
  margin: 0;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-block: clamp(22px, 4vw, 46px) clamp(36px, 6vw, 76px);
  background:
    radial-gradient(760px 420px at 78% -8%, rgba(79, 255, 227, .10), transparent 62%),
    radial-gradient(560px 340px at 4% 108%, rgba(184, 138, 68, .10), transparent 66%);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 4vw, 48px);
  align-items: start;
}

.page-about h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(34px, 7.6vw, 74px);
  line-height: 1.02;
  letter-spacing: -.025em;
  margin: 14px 0 0;
  color: var(--white);
}

.page-about h1 em {
  font-style: normal;
  color: var(--cyan);
  text-shadow: 0 0 34px rgba(79, 255, 227, .35);
}

.page-about .about-hero__intro {
  margin-top: 20px;
  font-size: clamp(15px, 1.7vw, 17px);
  color: var(--text);
  opacity: .88;
}

.page-about .about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 34px;
  margin-top: clamp(24px, 3.4vw, 38px);
  padding-top: 18px;
  border-top: 2px solid var(--line);
}

.page-about .about-hero__fact {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 108px;
}

.page-about .about-hero__num {
  font-size: clamp(20px, 2.6vw, 26px);
  font-weight: 700;
  color: var(--orange);
  letter-spacing: .04em;
}

.page-about .about-hero__label {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--muted);
}

.page-about .about-hero__side {
  position: relative;
  padding-left: 18px;
  border-left: 2px solid var(--line);
}

.page-about .about-vert-note {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--cyan);
  text-transform: uppercase;
  margin-bottom: 12px;
}

.page-about .about-hero__figure {
  margin: 0;
  border: 2px solid var(--line);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background: var(--ink-800);
}

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

.page-about .about-hero__caption {
  margin-top: 14px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--muted);
  max-width: 34ch;
}

/* ---------- 分栏与旁注 ---------- */
.page-about .about-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .about-split__body > p:first-of-type {
  margin-top: 18px;
}

.page-about .about-note-vert {
  display: block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--gold);
  text-transform: uppercase;
  border-top: 2px solid var(--gold);
  padding-top: 10px;
}

.page-about .about-points {
  list-style: none;
  padding: 0;
  margin: 26px 0 0;
  display: grid;
  gap: 12px;
  max-width: var(--about-body);
}

.page-about .about-points li {
  position: relative;
  padding-left: 26px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text);
  opacity: .9;
}

.page-about .about-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .55em;
  width: 12px;
  height: 3px;
  background: var(--cyan);
}

/* ---------- 章节头 ---------- */
.page-about .about-section-head {
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-about .about-section-head__lead {
  margin-top: 14px;
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .about-teammate {
  background: var(--ink-800);
  border: 2px solid var(--line);
  padding: 18px 18px 20px;
  transition: border-color var(--ease), box-shadow var(--ease), transform var(--ease);
}

.page-about .about-teammate:hover,
.page-about .about-teammate[open] {
  border-color: var(--cyan);
  box-shadow: var(--shadow-hard);
}

.page-about .about-teammate--wide {
  background: var(--ink-700);
}

.page-about .about-teammate > summary {
  list-style: none;
  cursor: pointer;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: baseline;
  gap: 12px;
}

.page-about .about-teammate > summary::-webkit-details-marker {
  display: none;
}

.page-about .about-teammate__idx {
  font-size: 12px;
  color: var(--gold);
  letter-spacing: .1em;
}

.page-about .about-teammate__name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(18px, 2.4vw, 23px);
  color: var(--white);
  letter-spacing: .01em;
}

.page-about .about-teammate__more {
  font-size: 11.5px;
  color: var(--muted);
  letter-spacing: .08em;
  white-space: nowrap;
}

.page-about .about-teammate__more::after {
  content: " +";
  color: var(--cyan);
  font-family: var(--font-mono);
}

.page-about .about-teammate[open] .about-teammate__more::after {
  content: " −";
}

.page-about .about-teammate__body {
  margin-top: 12px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-teammate__extra {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--muted);
  opacity: .9;
}

.page-about .about-team__figure {
  margin: clamp(24px, 3.4vw, 40px) 0 0;
  border: 2px solid var(--line);
  overflow: hidden;
  aspect-ratio: 3 / 2;
  background: var(--ink-800);
}

/* ---------- 时间线 ---------- */
.page-about .about-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 clamp(20px, 3vw, 30px);
}

.page-about .about-era {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  padding: 22px 0;
  border-top: 2px solid var(--line);
}

.page-about .about-era:last-child {
  border-bottom: 2px solid var(--line);
}

.page-about .about-era__stamp {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.page-about .about-era__ver {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--cyan);
  padding: 3px 8px;
  border: 1px solid var(--line);
  background: var(--ink-800);
}

.page-about .about-era__body p {
  font-size: 14.5px;
  margin-top: 8px;
}

.page-about .about-ver {
  position: relative;
  display: inline-block;
  margin-top: 14px;
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--gold);
  border-bottom: 1px dashed var(--gold);
  cursor: help;
  outline-offset: 4px;
}

.page-about .about-ver__tip {
  position: absolute;
  left: 0;
  top: calc(100% + 8px);
  z-index: 3;
  width: min(320px, 78vw);
  padding: 10px 12px;
  background: var(--ink-700);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-hard);
  font-family: var(--font-display);
  font-size: 12.5px;
  line-height: 1.7;
  letter-spacing: 0;
  color: var(--text);
  opacity: 0;
  transform: translateY(-4px);
  pointer-events: none;
  transition: opacity var(--ease), transform var(--ease);
}

.page-about .about-ver:hover .about-ver__tip,
.page-about .about-ver:focus .about-ver__tip,
.page-about .about-ver:focus-visible .about-ver__tip {
  opacity: 1;
  transform: translateY(0);
}

.page-about .about-timeline__figure {
  margin: clamp(24px, 3.4vw, 40px) 0 0;
  border: 2px solid var(--line);
  overflow: hidden;
  aspect-ratio: 3 / 2;
  background: var(--ink-800);
}

/* ---------- 存档区 ---------- */
.page-about .about-archive {
  border-top: 2px solid var(--line);
  border-bottom: 2px solid var(--line);
}

.page-about .about-archive h2 {
  color: var(--white);
}

.page-about .about-archive__head p {
  color: #F3DDE2;
  opacity: .92;
}

.page-about .about-archive__panel {
  margin-top: clamp(20px, 3vw, 30px);
  border: 2px solid rgba(255, 255, 255, .22);
  background: rgba(6, 21, 18, .42);
}

.page-about .about-archive__detail > summary {
  list-style: none;
  cursor: pointer;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
}

.page-about .about-archive__detail > summary::-webkit-details-marker {
  display: none;
}

.page-about .about-archive__idx {
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--gold);
}

.page-about .about-archive__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(15px, 2vw, 18px);
  color: var(--white);
}

.page-about .about-archive__toggle {
  width: 22px;
  height: 22px;
  border: 1px solid rgba(255, 255, 255, .4);
  position: relative;
}

.page-about .about-archive__toggle::before,
.page-about .about-archive__toggle::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--gold);
  transform: translate(-50%, -50%);
}

.page-about .about-archive__toggle::before {
  width: 10px;
  height: 1.5px;
}

.page-about .about-archive__toggle::after {
  width: 1.5px;
  height: 10px;
  transition: opacity var(--ease);
}

.page-about .about-archive__detail[open] .about-archive__toggle::after {
  opacity: 0;
}

.page-about .about-archive__list {
  list-style: none;
  margin: 0;
  padding: 4px 18px 16px;
  display: grid;
  gap: 12px;
}

.page-about .about-archive__list li {
  position: relative;
  padding-left: 22px;
  font-size: 14px;
  line-height: 1.8;
  color: #F3DDE2;
}

.page-about .about-archive__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .7em;
  width: 10px;
  height: 2px;
  background: var(--gold);
}

.page-about .about-archive__list strong {
  color: var(--white);
  font-weight: 700;
}

.page-about .about-archive__note {
  padding: 0 18px 18px;
  margin: 0;
  font-size: 13px;
  line-height: 1.8;
  color: #E7C9CF;
  max-width: var(--about-body);
}

.page-about .about-archive__note a {
  color: var(--gold);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 规模 ---------- */
.page-about .about-stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin: 0;
  border-top: 2px solid var(--line);
}

.page-about .about-stat {
  padding: 22px 0;
  border-bottom: 2px solid var(--line);
}

.page-about .about-stat dt {
  font-size: 12.5px;
  letter-spacing: .1em;
  color: var(--muted);
  text-transform: uppercase;
}

.page-about .about-stat dd {
  margin: 8px 0 0;
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.page-about .about-stat__num {
  font-size: clamp(40px, 7vw, 62px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  letter-spacing: .02em;
}

.page-about .about-stat__unit {
  font-size: 14px;
  color: var(--muted);
}

.page-about .about-stat p {
  margin-top: 10px;
  font-size: 13.5px;
  line-height: 1.75;
  max-width: 40ch;
}

/* ---------- 荣誉 ---------- */
.page-about .about-honor {
  border-top: 2px solid var(--line);
  border-bottom: 2px solid var(--line);
}

.page-about .about-honor__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3.4vw, 44px);
}

.page-about .about-honor__main p {
  color: #D9D3EC;
}

.page-about .about-honor__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  align-content: start;
  border-top: 2px solid rgba(79, 255, 227, .32);
}

.page-about .about-honor__list li {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 13px 0;
  border-bottom: 1px solid rgba(79, 255, 227, .2);
  font-size: 14px;
  line-height: 1.65;
  color: var(--text);
}

.page-about .about-honor__list .mono {
  color: var(--cyan);
  font-size: 13px;
  min-width: 48px;
  letter-spacing: .05em;
}

/* ---------- 联系 ---------- */
.page-about .about-cta__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3.4vw, 44px);
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin-top: 24px;
}

.page-about .about-cta__panel {
  background: var(--ink-800);
  border: 2px solid var(--line);
  box-shadow: var(--shadow-hard);
  padding: 20px 18px;
}

.page-about .about-contact {
  margin: 0;
  display: grid;
  gap: 0;
}

.page-about .about-contact__row {
  padding: 13px 0;
  border-bottom: 1px dashed var(--line);
}

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

.page-about .about-contact__row:first-child {
  padding-top: 0;
}

.page-about .about-contact dt {
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--muted);
  text-transform: uppercase;
}

.page-about .about-contact dd {
  margin: 7px 0 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
}

.page-about .about-contact dd a {
  font-family: var(--font-mono);
  font-size: clamp(14px, 1.9vw, 17px);
  color: var(--white);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan);
  padding-bottom: 1px;
  word-break: break-all;
}

.page-about .about-contact dd a:hover {
  color: var(--cyan);
}

.page-about .about-contact__addr {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text);
}

.page-about .about-contact__note {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 2px solid var(--line);
  font-size: 12.5px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 40ch;
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-about .about-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(20px, 4vw, 56px);
  }
}

@media (min-width: 860px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(24px, 4vw, 56px);
  }

  .page-about .about-hero__figure {
    aspect-ratio: 16 / 10;
  }

  .page-about .about-vert-note {
    writing-mode: vertical-rl;
    text-orientation: mixed;
    position: absolute;
    left: -2px;
    top: 0;
    margin: 0;
    padding-top: 8px;
    border-left: 0;
    letter-spacing: .22em;
  }

  .page-about .about-hero__side {
    padding-left: 34px;
    padding-right: 8px;
  }

  .page-about .about-split {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(20px, 3.6vw, 52px);
  }

  .page-about .about-note-vert {
    writing-mode: vertical-rl;
    text-orientation: mixed;
    border-top: 0;
    border-left: 2px solid var(--gold);
    padding-top: 0;
    padding-left: 10px;
    letter-spacing: .2em;
    margin-top: 8px;
  }

  .page-about .about-team__grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .about-teammate {
    grid-column: span 5;
  }

  .page-about .about-teammate--wide {
    grid-column: span 7;
  }

  .page-about .about-era {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: var(--about-gap);
    padding-block: 28px;
  }

  .page-about .about-era:nth-child(odd) {
    padding-right: clamp(0px, 9vw, 170px);
  }

  .page-about .about-era:nth-child(even) {
    padding-left: clamp(0px, 9vw, 170px);
  }

  .page-about .about-era__stamp {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .page-about .about-honor__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: clamp(28px, 5vw, 72px);
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: clamp(28px, 5vw, 72px);
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    column-gap: clamp(20px, 2.6vw, 40px);
  }

  .page-about .about-archive__inner {
    max-width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-teammate,
  .page-about .about-ver__tip,
  .page-about .about-archive__toggle::after {
    transition: none;
  }

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