.page-about {
  --about-rail: 112px;
  --about-wine-light: #E0879F;
  --about-teal-light: #4FD8C4;
}

/* ============ 首屏 ============ */
.page-about .about-hero {
  position: relative;
  border-bottom: 2px solid var(--line);
}

.page-about .about-hero__kicker {
  margin: 24px 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--green);
}

.page-about .about-hero__title {
  margin: 0 0 22px;
  max-width: 20ch;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(31px, 7.6vw, 66px);
  line-height: 1.04;
  letter-spacing: .01em;
  color: var(--text);
}

.page-about .about-hero__title em {
  display: block;
  font-style: normal;
  color: var(--green);
}

.page-about .about-hero__lede {
  max-width: 64ch;
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 13px 16px;
  border: 2px solid var(--line);
  border-left: 4px solid var(--green);
  background: var(--panel);
}

.page-about .about-hero__num {
  flex: 0 0 auto;
  min-width: 74px;
  font-family: var(--font-display);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: .01em;
  color: var(--green);
  font-variant-numeric: tabular-nums;
}

.page-about .about-hero__cap {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--muted);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

/* ============ 01 起点 ============ */
.page-about .about-origin__grid {
  display: grid;
  gap: 26px;
}

.page-about .about-origin__lede {
  margin: 0;
  padding: 4px 0 4px 20px;
  border-left: 4px solid var(--violet);
  font-family: var(--font-serif);
  font-size: clamp(19px, 3.4vw, 25px);
  line-height: 1.65;
  color: var(--text);
}

.page-about .about-origin__body p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .about-origin__body p:last-child {
  margin-bottom: 0;
}

/* ============ 02 编年 ============ */
.page-about .about-chrono__banner {
  margin: 0 0 36px;
}

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

.page-about .about-chrono__body {
  display: grid;
  gap: 22px;
}

.page-about .about-years {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 8px;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-year {
  flex: 0 0 auto;
  padding: 9px 15px;
  border: 2px solid var(--line);
  background: var(--panel);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--muted);
  text-decoration: none;
  transition: color .2s var(--ease), background .2s var(--ease), border-color .2s var(--ease);
}

.page-about .about-year:hover,
.page-about .about-year:focus-visible {
  color: var(--ink);
  background: var(--green);
  border-color: var(--green);
  outline: none;
}

.page-about .about-events {
  position: relative;
  margin: 0;
  padding: 0 0 0 22px;
  list-style: none;
  border-left: 2px dashed var(--line);
}

.page-about .about-event {
  position: relative;
  margin-bottom: 20px;
  padding: 18px 18px 20px;
  border: 2px solid var(--line);
  border-top: 5px solid var(--about-accent, var(--line));
  background: var(--panel);
  box-shadow: var(--shadow-soft);
  transition: box-shadow .25s var(--ease), border-color .25s var(--ease);
}

.page-about .about-event:last-child {
  margin-bottom: 0;
}

.page-about .about-event::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 24px;
  width: 10px;
  height: 10px;
  border: 2px solid var(--green);
  background: var(--ink);
  transition: transform .2s var(--ease), background .2s var(--ease);
}

.page-about .about-event:hover {
  box-shadow: var(--shadow-hard);
}

.page-about .about-event:hover::before {
  transform: scale(1.4);
  background: var(--green);
}

.page-about .about-event--wine {
  --about-accent: var(--wine);
  border-left-color: var(--line);
}

.page-about .about-event--teal {
  --about-accent: var(--teal);
}

.page-about .about-event--indigo {
  --about-accent: var(--indigo);
}

.page-about .about-event__year {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: .04em;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

.page-about .about-event__name {
  margin: 10px 0 8px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--green);
}

.page-about .about-event__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--muted);
}

/* ============ 03 团队 ============ */
.page-about .about-team__grid {
  display: grid;
  gap: 30px;
}

.page-about .about-team__lede {
  margin: 0 0 22px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .about-roles {
  display: grid;
  gap: 13px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-role {
  padding: 16px 16px 18px;
  border: 2px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow-soft);
  transition: border-color .22s var(--ease), box-shadow .22s var(--ease);
}

.page-about .about-role:hover {
  border-color: var(--green);
  box-shadow: var(--shadow-hard);
}

.page-about .about-role__no {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--amber);
}

.page-about .about-role__name {
  margin: 9px 0 7px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--text);
}

.page-about .about-role__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}

/* ============ 04 简史库 ============ */
.page-about .about-hall__grid {
  display: grid;
  gap: 30px;
}

.page-about .about-hall__lede {
  margin: 0 0 16px;
  font-family: var(--font-serif);
  font-size: clamp(18px, 3vw, 22px);
  line-height: 1.68;
  color: var(--text);
}

.page-about .about-hall__text {
  margin: 0 0 18px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-hall__text:last-child {
  margin-bottom: 0;
}

.page-about .about-badges {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(112px, 1fr));
  gap: 18px 12px;
  margin: 26px 0;
  padding: 20px 14px;
  list-style: none;
  border: 2px solid var(--line);
  background: var(--ink);
}

.page-about .about-badge-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 12px 6px 10px;
  border: 2px solid transparent;
  text-align: center;
  transition: border-color .22s var(--ease), background .22s var(--ease);
}

.page-about .about-badge-item:hover,
.page-about .about-badge-item:focus-within {
  border-color: var(--line);
  background: var(--panel);
}

.page-about .about-badge {
  display: block;
  width: 96px;
  height: 96px;
  transition: transform .25s var(--ease);
}

.page-about .about-badge-item:hover .about-badge {
  transform: scale(1.06);
}

.page-about .about-badge__core {
  fill: currentColor;
  opacity: .14;
}

.page-about .about-badge__ring {
  fill: none;
  stroke: currentColor;
  stroke-width: 3;
}

.page-about .about-badge__inner {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-dasharray: 4 7;
  opacity: .6;
}

.page-about .about-badge__glyph {
  fill: currentColor;
}

.page-about .about-badge--green { color: var(--green); }
.page-about .about-badge--amber { color: var(--amber); }
.page-about .about-badge--violet { color: var(--violet); }
.page-about .about-badge--wine { color: var(--about-wine-light); }
.page-about .about-badge--teal { color: var(--about-teal-light); }

.page-about .about-badge__label {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--text);
}

.page-about .about-badge__years {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .07em;
  color: var(--muted);
  opacity: .55;
  transition: opacity .2s var(--ease), color .2s var(--ease);
}

.page-about .about-badge-item:hover .about-badge__years,
.page-about .about-badge-item:focus-within .about-badge__years {
  opacity: 1;
  color: var(--amber);
}

/* ============ 05 版本 ============ */
.page-about .about-ver-list {
  display: grid;
  gap: 12px;
}

.page-about .about-ver {
  border: 2px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow-soft);
  transition: border-color .22s var(--ease), box-shadow .22s var(--ease);
}

.page-about .about-ver:hover {
  border-color: var(--green);
}

.page-about .about-ver[open] {
  border-left: 5px solid var(--amber);
  box-shadow: var(--shadow-hard);
}

.page-about .about-ver__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  padding: 15px 18px;
  cursor: pointer;
  list-style: none;
}

.page-about .about-ver__head::-webkit-details-marker {
  display: none;
}

.page-about .about-ver__head::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 19px;
  line-height: 1;
  color: var(--green);
}

.page-about .about-ver[open] .about-ver__head::after {
  content: "–";
  color: var(--amber);
}

.page-about .about-ver__no {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: .04em;
  color: var(--green);
  font-variant-numeric: tabular-nums;
}

.page-about .about-ver__season {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--muted);
}

.page-about .about-ver__title {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--text);
}

.page-about .about-ver__body {
  padding: 0 18px 18px;
  border-top: 1px dashed var(--line);
}

.page-about .about-ver__body p {
  margin: 15px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

/* ============ 06 伙伴 ============ */
.page-about .about-partner__panel {
  position: relative;
  padding: clamp(24px, 5vw, 50px);
  border: 2px solid var(--line);
  background: linear-gradient(142deg, var(--indigo) 0%, var(--ink) 58%, var(--wine) 100%);
  box-shadow: var(--shadow-hard);
}

.page-about .about-partner__panel .plate__note {
  color: var(--about-teal-light);
}

.page-about .about-partner__grid {
  display: grid;
  gap: 26px;
  margin-top: 24px;
}

.page-about .about-partner__lede {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text);
}

.page-about .about-partner__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--muted);
}

.page-about .about-partner__actions {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 14px;
}

.page-about .about-partner__link {
  font-size: 15px;
  color: var(--text);
}

/* ============ 响应式 ============ */
@media (min-width: 640px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

@media (min-width: 900px) {
  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.22fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    gap: 46px;
    align-items: start;
  }

  .page-about .about-hall__grid {
    grid-template-columns: minmax(0, 320px) minmax(0, 1fr);
    gap: 46px;
    align-items: start;
  }

  .page-about .about-partner__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: 44px;
    align-items: center;
  }

  .page-about .about-partner__actions {
    align-items: stretch;
  }
}

@media (min-width: 1024px) {
  .page-about .about-chrono__body {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .about-years {
    flex-direction: column;
    gap: 6px;
    overflow: visible;
    padding-bottom: 0;
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }

  .page-about .about-year {
    text-align: center;
    padding: 11px 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-year,
  .page-about .about-event,
  .page-about .about-event::before,
  .page-about .about-role,
  .page-about .about-badge,
  .page-about .about-badge__years,
  .page-about .about-ver {
    transition: none;
  }
}