.page-about {
  --ab-line: rgba(216, 166, 60, .22);
  --ab-hair: rgba(199, 187, 168, .16);
  position: relative;
  overflow-x: clip;
}

.page-about .ab-block {
  padding-block: clamp(40px, 6.5vw, 82px);
}

/* ---------- 首屏 ---------- */

.page-about .ab-hero {
  position: relative;
  padding: clamp(28px, 5vw, 60px) 0 clamp(34px, 6vw, 76px);
  border-bottom: 1px solid var(--frame-soft);
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(126deg, rgba(183, 48, 31, .34) 0%, rgba(110, 26, 17, .10) 46%, transparent 72%);
  clip-path: polygon(0 0, 100% 0, 100% 24%, 0 76%);
  pointer-events: none;
}

.page-about .ab-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 52px);
}

.page-about .ab-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 6vw, 64px);
  line-height: 1.12;
  letter-spacing: -.02em;
  color: var(--warm-white);
}

.page-about .ab-hero__title em {
  font-style: normal;
  color: var(--gold);
}

.page-about .ab-hero__lead {
  margin: 18px 0 0;
  max-width: 34em;
  color: var(--mist);
  line-height: 1.85;
}

.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .ab-hero__rail {
  display: grid;
  gap: 22px;
  align-content: start;
}

.page-about .ab-seal {
  display: block;
  width: min(168px, 46%);
  border: 1px solid var(--frame-soft);
  transition: transform 240ms var(--ease), border-color 240ms var(--ease);
}

.page-about .ab-seal:hover,
.page-about .ab-seal:focus-visible {
  transform: translateX(2px);
  border-color: var(--gold);
}

.page-about .ab-seal img {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .ab-figures {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--ab-line);
}

.page-about .ab-fig {
  border-bottom: 1px solid var(--ab-hair);
}

.page-about .ab-fig a {
  display: grid;
  grid-template-columns: minmax(0, auto) minmax(0, 1fr);
  align-items: baseline;
  gap: 14px;
  padding: 12px 2px;
  text-decoration: none;
  color: inherit;
  transition: transform 240ms var(--ease);
}

.page-about .ab-fig a:hover,
.page-about .ab-fig a:focus-visible {
  transform: translateX(2px);
}

.page-about .ab-fig__num {
  font-size: clamp(26px, 4.4vw, 40px);
  line-height: 1;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
  transition: color 240ms var(--ease);
}

.page-about .ab-fig a:hover .ab-fig__num {
  color: var(--gold-soft);
}

.page-about .ab-fig__lab {
  font-size: 13px;
  line-height: 1.6;
  color: var(--dim);
}

/* ---------- 品牌由来 ---------- */

.page-about .ab-story__body {
  max-width: 64ch;
}

.page-about .ab-story__body p {
  margin: 0 0 1.1em;
  color: var(--mist);
  line-height: 1.85;
}

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

.page-about .ab-drop::first-letter {
  float: left;
  padding: 8px 12px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 3.1em;
  line-height: .92;
  color: var(--cinnabar);
  text-shadow: 0 0 18px rgba(183, 48, 31, .45);
}

/* ---------- 时间线 ---------- */

.page-about .ab-timeline {
  --ab-pad: clamp(22px, 4vw, 44px);
  position: relative;
  margin: 0;
  padding: 0 0 0 var(--ab-pad);
  list-style: none;
}

.page-about .ab-timeline::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold-soft) 0%, rgba(216, 166, 60, .30) 45%, rgba(216, 166, 60, .08) 100%);
}

.page-about .ab-node {
  position: relative;
  padding-bottom: clamp(24px, 3.6vw, 40px);
}

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

.page-about .ab-node::before {
  content: "";
  position: absolute;
  left: calc(-1 * var(--ab-pad) - 4px);
  top: 6px;
  width: 8px;
  height: 8px;
  background: var(--gold);
  transition: transform 200ms var(--ease), background-color 200ms var(--ease);
}

.page-about .ab-node:hover::before,
.page-about .ab-node:focus-within::before {
  transform: scale(1.25);
  background: var(--gold-soft);
}

.page-about .ab-node__year {
  margin: 0;
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--gold-soft);
}

.page-about .ab-node__title {
  margin: 6px 0 4px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(18px, 2.4vw, 23px);
  line-height: 1.4;
  color: var(--warm-white);
}

.page-about .ab-node__stat {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--dim);
}

.page-about .ab-node__more {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 240ms var(--ease), opacity 200ms var(--ease);
}

.page-about .ab-node:hover .ab-node__more,
.page-about .ab-node:focus-within .ab-node__more {
  max-height: 220px;
  opacity: 1;
}

.page-about .ab-node__more p {
  margin: 10px 0 6px;
  padding-left: 12px;
  border-left: 1px solid var(--ab-line);
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .ab-node__more a {
  margin-left: 13px;
  font-size: 13px;
}

/* ---------- 团队 ---------- */

.page-about .ab-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

.page-about .ab-team__fig {
  margin: 0;
}

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

.page-about .ab-roster {
  margin: 0;
  border-top: 1px solid var(--ab-line);
}

.page-about .ab-roster__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 14px 0;
  border-bottom: 1px solid var(--ab-hair);
}

.page-about .ab-roster__role {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  color: var(--warm-white);
}

.page-about .ab-roster__num {
  font-size: 13px;
  font-weight: 400;
  color: var(--gold);
}

.page-about .ab-roster__desc {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--dim);
}

/* ---------- 三道关 ---------- */

.page-about .ab-gates {
  display: grid;
  gap: 0;
}

.page-about .ab-gate {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: start;
  gap: 8px 18px;
  padding: 20px 0;
  border-top: 1px solid var(--ab-hair);
}

.page-about .ab-gate:last-child {
  border-bottom: 1px solid var(--ab-hair);
}

.page-about .ab-gate__num {
  margin: 0;
  padding: 5px 9px;
  font-size: 14px;
  line-height: 1;
  color: var(--warm-white);
  background: linear-gradient(135deg, var(--cinnabar) 0%, var(--cinnabar-dark) 100%);
}

.page-about .ab-gate__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(17px, 2.2vw, 21px);
  color: var(--warm-white);
}

.page-about .ab-gate__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--dim);
}

.page-about .ab-gates__note {
  max-width: 62ch;
  margin: 22px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .ab-gates__note a {
  color: var(--gold-soft);
}

/* ---------- 月度花费 ---------- */

.page-about .ab-cost {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
  padding: clamp(24px, 4.2vw, 46px);
  border: 1px solid var(--frame);
  background:
    linear-gradient(122deg, rgba(23, 19, 15, .94) 0%, rgba(110, 26, 17, .28) 62%, rgba(23, 19, 15, .9) 100%);
  position: relative;
}

.page-about .ab-cost::after {
  content: "";
  position: absolute;
  right: 14px;
  bottom: 14px;
  width: 54px;
  height: 54px;
  border-right: 1px solid var(--frame-soft);
  border-bottom: 1px solid var(--frame-soft);
  opacity: .8;
  pointer-events: none;
}

.page-about .ab-cost__title {
  margin: 10px 0 14px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 3.4vw, 32px);
  line-height: 1.3;
  color: var(--warm-white);
}

.page-about .ab-cost__text p {
  margin: 0 0 1em;
  max-width: 60ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .ab-cost__text a {
  color: var(--gold-soft);
}

.page-about .ab-cost__figure {
  align-self: end;
  padding-top: 18px;
  border-top: 1px solid var(--ab-line);
}

.page-about .ab-cost__num {
  margin: 0;
  font-size: clamp(48px, 10vw, 88px);
  line-height: 1;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-cost__num span {
  font-size: .5em;
  color: var(--gold-soft);
  margin-left: 4px;
}

.page-about .ab-cost__lab {
  margin: 10px 0 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .ab-cost__meta {
  margin: 10px 0 0;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--dim);
}

/* ---------- 地域 ---------- */

.page-about .ab-city__fig {
  margin: 0 0 clamp(22px, 3.4vw, 36px);
}

.page-about .ab-city__body {
  max-width: 68ch;
}

.page-about .ab-city__body p {
  margin: 0 0 1.1em;
  color: var(--mist);
  line-height: 1.9;
}

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

/* ---------- 延伸阅读 ---------- */

.page-about .ab-next {
  margin-top: clamp(30px, 4.6vw, 52px);
  border-top: 1px solid var(--ab-line);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}

.page-about .ab-next__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 4px 16px;
  padding: 16px 2px;
  border-bottom: 1px solid var(--ab-hair);
  text-decoration: none;
  color: inherit;
  transition: transform 240ms var(--ease), border-color 240ms var(--ease);
}

.page-about .ab-next__item:hover,
.page-about .ab-next__item:focus-visible {
  transform: translateX(2px);
  border-bottom-color: var(--gold);
}

.page-about .ab-next__item .coord {
  grid-row: span 2;
  align-self: center;
  color: var(--gold);
}

.page-about .ab-next__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  color: var(--warm-white);
}

.page-about .ab-next__desc {
  font-size: 13px;
  line-height: 1.7;
  color: var(--dim);
}

/* ---------- 断点 ---------- */

@media (min-width: 700px) {
  .page-about .ab-next {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .ab-next__item {
    grid-template-columns: minmax(0, 1fr);
    align-content: start;
    gap: 6px;
    padding: 18px 18px 18px 0;
    border-bottom: none;
    border-top: none;
  }

  .page-about .ab-next__item .coord {
    grid-row: auto;
  }

  .page-about .ab-next__item + .ab-next__item {
    padding-left: 18px;
    border-left: 1px solid var(--ab-hair);
  }
}

@media (min-width: 900px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1.62fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .ab-hero__rail {
    padding-left: clamp(18px, 2.4vw, 32px);
    border-left: 1px solid var(--frame-soft);
  }

  .page-about .ab-team {
    grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr);
    gap: clamp(30px, 4vw, 56px);
  }

  .page-about .ab-roster__row {
    grid-template-columns: minmax(0, 9.5em) minmax(0, 1fr);
    align-items: baseline;
    gap: 16px;
  }

  .page-about .ab-gate:nth-child(2) {
    margin-left: 30px;
  }

  .page-about .ab-gate:nth-child(3) {
    margin-left: 60px;
  }

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

  .page-about .ab-cost__figure {
    padding-top: 22px;
    text-align: right;
  }

  .page-about .ab-city__body {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 clamp(28px, 4vw, 56px);
    max-width: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-fig a,
  .page-about .ab-seal,
  .page-about .ab-node::before,
  .page-about .ab-node__more,
  .page-about .ab-next__item {
    transition: none;
  }

  .page-about .ab-fig a:hover,
  .page-about .ab-seal:hover,
  .page-about .ab-node:hover::before,
  .page-about .ab-next__item:hover {
    transform: none;
  }
}