.page-about,
.page-about *,
.page-about *::before,
.page-about *::after {
  box-sizing: border-box;
}

.page-about {
  --about-ink-soft: #4A423C;
  --about-ink-faint: #6B625B;
  --about-radius: var(--radius-m);
  display: block;
  background: var(--ink);
  color: var(--cream);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

.page-about img {
  max-width: 100%;
  height: auto;
}

.page-about .hist-shell {
  width: 100%;
  max-width: var(--shell, 1280px);
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- 首屏 ---------- */

.page-about .hist-hero {
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(255, 122, 47, .14) 0%, rgba(255, 122, 47, 0) 58%),
    linear-gradient(158deg, var(--ink) 0%, var(--ink-deep) 52%, var(--ink-layer) 100%);
  color: var(--cream);
  padding: 36px 0 56px;
}

.page-about .hist-crumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  list-style: none;
  margin: 0 0 30px;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .05em;
}

.page-about .hist-crumbs li {
  color: var(--silver-55);
}

.page-about .hist-crumbs li + li::before {
  content: "/";
  margin: 0 8px;
  color: var(--slate-end);
}

.page-about .hist-crumbs a {
  color: var(--silver-70);
  text-decoration: none;
}

.page-about .hist-crumbs a:hover {
  color: var(--signal);
  text-decoration: underline;
}

.page-about .hist-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
}

.page-about h1 {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-size: clamp(30px, 7vw, 52px);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--cream);
  text-wrap: balance;
}

.page-about .hist-eyebrow {
  display: inline-block;
  margin: 0 0 14px;
  padding-left: 10px;
  border-left: 3px solid var(--signal);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.2;
  letter-spacing: .16em;
  color: var(--signal);
}

.page-about .hist-eyebrow--umber {
  border-left-color: var(--ember);
  color: var(--ember);
}

.page-about .hist-lede {
  max-width: 60ch;
  margin: 0 0 34px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--silver-85);
}

.page-about .hist-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 10px;
  list-style: none;
  margin: 0;
  padding: 22px 0 0;
  border-top: 1px solid var(--line-strong);
}

.page-about .hist-stats__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 32px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--signal);
}

.page-about .hist-stats__label {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--silver-55);
}

.page-about .hist-hero__figure {
  margin: 0;
}

.page-about .hist-hero__figure img {
  display: block;
  width: 100%;
  border-radius: var(--about-radius);
  border: 1px solid var(--line);
  filter: saturate(.86) contrast(1.03);
}

.page-about .hist-hero__figure figcaption {
  margin-top: 14px;
  padding-left: 10px;
  border-left: 2px solid var(--signal);
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--silver-55);
}

/* ---------- 通用分区 ---------- */

.page-about .hist-band {
  padding: 56px 0;
}

.page-about .hist-band--cream {
  background: var(--cream);
  color: var(--umber);
}

.page-about .hist-band--slate {
  background: linear-gradient(140deg, var(--slate) 0%, var(--ink-layer) 54%, var(--ink) 100%);
  color: var(--cream);
}

.page-about .hist-band--indigo {
  background: var(--ink-layer);
  color: var(--cream);
}

.page-about .hist-band--ink {
  background:
    radial-gradient(90% 120% at 10% 100%, rgba(255, 122, 47, .16) 0%, rgba(255, 122, 47, 0) 55%),
    var(--ink-deep);
  color: var(--cream);
}

.page-about .hist-head {
  max-width: 780px;
}

.page-about .hist-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(22px, 4.4vw, 32px);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.01em;
  text-wrap: balance;
}

.page-about .hist-sub {
  max-width: 62ch;
  margin: 16px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--silver-70);
}

.page-about .hist-sub--umber {
  color: var(--about-ink-soft);
}

.page-about .hist-narrative {
  max-width: 70ch;
  margin-top: 26px;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--about-ink-soft);
}

.page-about .hist-narrative p {
  margin: 0 0 20px;
}

.page-about .hist-narrative p:first-child::first-letter {
  font-size: 2.2em;
  font-weight: 800;
  line-height: 1;
  float: left;
  margin: 6px 10px 0 0;
  color: var(--ember);
  font-family: var(--font-display);
}

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

/* ---------- 版图与年表双栏 ---------- */

.page-about .hist-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 38px;
  margin-top: 38px;
}

.page-about .hist-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 26px;
  border-left: 1px solid var(--line-strong);
}

.page-about .hist-timeline > li {
  position: relative;
  padding: 0 0 30px;
}

.page-about .hist-timeline > li:last-child {
  padding-bottom: 0;
}

.page-about .hist-timeline > li::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 5px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 0 3px rgba(255, 122, 47, .18);
}

.page-about .hist-stage {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--signal);
}

.page-about .hist-stage-title {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--cream);
}

.page-about .hist-stage-text {
  margin: 0;
  max-width: 58ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--silver-70);
}

.page-about .hist-atlas {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  background: linear-gradient(180deg, rgba(51, 70, 94, .55) 0%, rgba(27, 46, 82, .35) 100%);
}

.page-about .hist-atlas__map {
  display: block;
  width: 100%;
  border-radius: var(--radius-s);
  filter: saturate(.78);
}

.page-about .hist-legend {
  list-style: none;
  margin: 18px 0 0;
  padding: 16px 0 0;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 11px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--silver-70);
}

.page-about .hist-legend li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.page-about .hist-legend__mark {
  flex: none;
  margin-top: 4px;
  width: 22px;
  height: 10px;
  border-radius: 2px;
  border: 2px solid var(--signal);
}

.page-about .hist-legend__mark--auth {
  border-color: var(--cream);
  border-style: dashed;
}

.page-about .hist-legend__mark--channel {
  border-color: var(--silver-55);
  border-style: dotted;
}

/* ---------- 省域矩阵 ---------- */

.page-about .hist-regions {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin-top: 44px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  overflow: hidden;
}

.page-about .hist-region {
  background: rgba(11, 23, 48, .78);
  padding: 16px 16px 18px;
}

.page-about .hist-region__name {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--signal);
}

.page-about .hist-region__count {
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--silver-55);
}

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

.page-about .hist-region__list li {
  padding: 4px 9px;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: rgba(198, 206, 216, .07);
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--silver-85);
}

/* ---------- 门店角色 ---------- */

.page-about .hist-roles {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  border-top: 1px solid rgba(36, 30, 27, .18);
}

.page-about .hist-role {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  padding: 24px 0;
  border-bottom: 1px solid rgba(36, 30, 27, .18);
}

.page-about .hist-role__no {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--ember);
}

.page-about .hist-role__title {
  margin: 0 0 10px;
  font-size: 19px;
  font-weight: 800;
  line-height: 1.4;
  color: var(--umber);
}

.page-about .hist-role__desc {
  max-width: 64ch;
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--about-ink-soft);
}

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

.page-about .hist-role__tags li {
  padding: 4px 10px;
  border: 1px solid rgba(36, 30, 27, .22);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--about-ink-faint);
}

/* ---------- 团队与服务 ---------- */

.page-about .hist-team {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: start;
}

.page-about .hist-team__figure {
  margin: 0;
}

.page-about .hist-team__figure img {
  display: block;
  width: 100%;
  border-radius: var(--about-radius);
  border: 1px solid var(--line);
}

.page-about .hist-team__figure figcaption {
  margin-top: 14px;
  padding-left: 10px;
  border-left: 2px solid var(--signal);
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--silver-55);
}

.page-about .hist-services {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .hist-services li {
  padding: 4px 0 4px 14px;
  border-left: 2px solid var(--signal);
}

.page-about .hist-services h3 {
  margin: 0 0 5px;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--cream);
}

.page-about .hist-services p {
  margin: 0;
  max-width: 62ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--silver-70);
}

/* ---------- 合作生态 ---------- */

.page-about .hist-eco {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin-top: 30px;
}

.page-about .hist-eco__card {
  padding: 22px 22px 24px;
  border: 1px solid rgba(36, 30, 27, .14);
  border-radius: var(--about-radius);
  background: linear-gradient(180deg, rgba(16, 30, 56, .055) 0%, rgba(228, 220, 204, .55) 100%);
}

.page-about .hist-eco__card h3 {
  margin: 0 0 10px;
  font-size: 18px;
  font-weight: 800;
  line-height: 1.4;
  color: var(--umber);
}

.page-about .hist-eco__card p {
  margin: 0;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--about-ink-soft);
}

.page-about .hist-eco__card--auth {
  border-top: 3px solid var(--ember);
}

.page-about .hist-eco__card--channel {
  border-top: 3px solid var(--green);
}

.page-about .hist-eco__card--kit {
  border-top: 3px solid var(--slate);
}

/* ---------- 收尾通道 ---------- */

.page-about .hist-cta__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  align-items: center;
}

.page-about .hist-cta__text .hist-sub {
  margin-top: 14px;
}

.page-about .hist-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .hist-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: var(--radius-s);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .02em;
  text-decoration: none;
  transition: background .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease);
}

.page-about .hist-btn--signal {
  background: var(--signal);
  color: var(--ink);
}

.page-about .hist-btn--signal:hover {
  background: var(--signal-soft);
}

.page-about .hist-btn--ghost {
  border-color: var(--line-strong);
  color: var(--cream);
}

.page-about .hist-btn--ghost:hover {
  border-color: var(--signal);
  color: var(--signal);
}

.page-about .hist-btn:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 3px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 620px) {
  .page-about .hist-shell {
    padding: 0 28px;
  }

  .page-about .hist-hero {
    padding: 44px 0 64px;
  }

  .page-about .hist-band {
    padding: 64px 0;
  }

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

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

  .page-about .hist-role {
    grid-template-columns: 68px minmax(0, 1fr);
    gap: 22px;
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-about .hist-shell {
    padding: 0 36px;
  }

  .page-about .hist-hero {
    padding: 52px 0 76px;
  }

  .page-about .hist-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 52px;
    align-items: start;
  }

  .page-about .hist-band {
    padding: 76px 0;
  }

  .page-about .hist-narrative {
    font-size: 16px;
  }

  .page-about .hist-split {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .hist-regions {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin-top: 52px;
  }

  .page-about .hist-region--last {
    grid-column: span 1;
  }

  .page-about .hist-team {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    gap: 52px;
  }

  .page-about .hist-eco {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 22px;
    margin-top: 36px;
  }

  .page-about .hist-eco__card--kit {
    grid-column: 1 / -1;
  }

  .page-about .hist-cta__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 40px;
  }

  .page-about .hist-cta__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 1180px) {
  .page-about .hist-hero__grid {
    gap: 64px;
  }

  .page-about .hist-band {
    padding: 88px 0;
  }
}