.page-about {
  display: block;
  position: relative;
  padding-bottom: clamp(56px, 8vw, 112px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(24px, 3.6vw, 40px) 0 clamp(30px, 4.4vw, 56px);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -46%;
  right: -14%;
  width: min(660px, 82vw);
  height: min(660px, 82vw);
  background: radial-gradient(circle at 50% 50%, rgba(63, 242, 208, 0.13), rgba(63, 242, 208, 0) 64%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 38%;
  height: 2px;
  background: linear-gradient(90deg, var(--signal), rgba(63, 242, 208, 0));
  pointer-events: none;
}

.page-about .about-crumb-current {
  color: var(--gold-soft);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  margin-top: 22px;
  position: relative;
  z-index: 1;
}

.page-about .about-hero__eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--muted);
}

.page-about .about-hero__flag {
  display: inline-block;
  padding: 3px 10px;
  border: 1px solid rgba(228, 180, 87, 0.5);
  border-radius: 999px;
  color: var(--gold);
  font-size: 11px;
  letter-spacing: 0.16em;
}

.page-about .about-hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 6vw, 64px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-about .about-hero__lede {
  margin: 20px 0 0;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  align-content: end;
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 14px 12px;
  background: rgba(18, 38, 31, 0.82);
  border-left: 2px solid var(--gold);
}

.page-about .about-stat__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: 24px;
  line-height: 1.1;
  color: var(--text);
}

.page-about .about-stat__num em {
  font-style: normal;
  font-size: 12px;
  margin-left: 3px;
  color: var(--gold);
}

.page-about .about-stat__label {
  font-size: 12px;
  line-height: 1.5;
  color: var(--muted);
}

/* ---------- 分栏骨架 ---------- */
.page-about .about-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  padding-top: clamp(20px, 3vw, 36px);
}

/* ---------- 章节侧栏 ---------- */
.page-about .about-rail {
  padding-bottom: 6px;
}

.page-about .about-rail__title {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--muted);
}

.page-about .about-rail__list {
  display: flex;
  gap: 6px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-rail__list::-webkit-scrollbar {
  display: none;
}

.page-about .about-rail__link {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 13px;
  color: var(--muted);
  text-decoration: none;
  white-space: nowrap;
  transition: color 180ms ease, border-color 180ms ease, background-color 180ms ease;
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  color: var(--signal);
  border-color: var(--signal);
  outline: none;
}

.page-about .about-rail__idx {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--gold);
}

/* ---------- 章节通用 ---------- */
.page-about .about-section {
  padding: clamp(34px, 4.6vw, 64px) 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: 96px;
}

.page-about .about-section:first-child {
  border-top: none;
  padding-top: 8px;
}

.page-about .about-section__kicker {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--signal);
}

.page-about .about-section__title {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(23px, 3.3vw, 38px);
  line-height: 1.22;
  letter-spacing: -0.015em;
  color: var(--text);
}

.page-about .about-section p {
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--muted);
}

.page-about .about-section__intro {
  max-width: 52ch;
  color: var(--muted);
}

.page-about .about-section--indigo {
  background: linear-gradient(155deg, rgba(35, 42, 77, 0.92), rgba(35, 42, 77, 0.42));
  border-top-color: transparent;
  border-radius: 6px;
  padding: clamp(28px, 4vw, 52px) clamp(20px, 3.4vw, 46px);
  margin: clamp(20px, 3vw, 40px) 0;
}

.page-about .about-section--wine {
  background: linear-gradient(165deg, rgba(74, 31, 51, 0.9), rgba(74, 31, 51, 0.36));
  border-top-color: transparent;
  border-radius: 6px;
  padding: clamp(28px, 4vw, 52px) clamp(20px, 3.4vw, 46px);
  margin: clamp(20px, 3vw, 40px) 0;
}

/* ---------- 配图 ---------- */
.page-about .about-figure {
  margin: 0 0 24px;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: 4px;
  background: var(--ink-1);
}

.page-about .about-figure--square {
  max-width: 420px;
  margin-left: auto;
  margin-right: auto;
  margin-top: 28px;
  margin-bottom: 0;
}

.page-about .about-figure--square img {
  aspect-ratio: 1 / 1;
}

.page-about .about-figure--flow {
  margin-top: 30px;
  margin-bottom: 0;
}

.page-about .about-figure--flow img {
  aspect-ratio: 7 / 4;
  opacity: 0.72;
}

.page-about .about-figure__caption {
  display: block;
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--muted);
  padding-left: 12px;
  border-left: 2px solid var(--line);
}

/* ---------- 品牌引语 ---------- */
.page-about .about-quote {
  margin: 26px 0 0;
  padding: 20px 22px;
  background: rgba(74, 31, 51, 0.55);
  border-left: 3px solid var(--gold);
  border-radius: 0 4px 4px 0;
}

.page-about .about-quote p {
  margin: 0;
  font-size: 17px;
  line-height: 1.75;
  color: var(--text);
}

/* ---------- 四个小组 ---------- */
.page-about .about-teams {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
}

.page-about .about-team {
  padding: 18px 0 18px 18px;
  border-left: 2px solid rgba(63, 242, 208, 0.28);
  transition: border-color 200ms ease;
}

.page-about .about-team + .about-team {
  margin-top: 6px;
}

.page-about .about-team:hover {
  border-left-color: var(--signal);
}

.page-about .about-team__name {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--text);
}

.page-about .about-team__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 成稿流程 ---------- */
.page-about .about-flow {
  position: relative;
  list-style: none;
  margin: 24px 0 0;
  padding: 0 0 0 26px;
}

.page-about .about-flow::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 18px;
  width: 1px;
  background: linear-gradient(180deg, var(--signal), rgba(63, 242, 208, 0.08));
}

.page-about .about-flow__item {
  position: relative;
  padding: 0 0 22px;
}

.page-about .about-flow__item::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 7px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ink-0);
  border: 2px solid var(--signal);
}

.page-about .about-flow__idx {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--gold);
  margin-bottom: 4px;
}

.page-about .about-flow__name {
  margin: 0 0 5px;
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
}

.page-about .about-flow__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.76;
  color: var(--muted);
}

/* ---------- 栏目演进时间线 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
}

.page-about .about-timeline__node {
  display: grid;
  grid-template-columns: 78px minmax(0, 1fr);
  gap: 14px;
  padding: 18px 0;
  border-bottom: 1px dashed rgba(240, 217, 166, 0.22);
}

.page-about .about-timeline__node:last-child {
  border-bottom: none;
}

.page-about .about-timeline__year {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: 22px;
  line-height: 1.3;
  color: var(--gold);
  letter-spacing: -0.01em;
}

.page-about .about-timeline__name {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
}

.page-about .about-timeline__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.76;
  color: var(--muted);
}

/* ---------- 合作方向 ---------- */
.page-about .about-partners {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin: 22px 0 22px;
}

.page-about .about-partner {
  padding: 18px 18px 16px;
  background: rgba(18, 38, 31, 0.7);
  border-top: 2px solid rgba(228, 180, 87, 0.55);
  border-radius: 0 0 4px 4px;
}

.page-about .about-partner__name {
  margin: 0 0 7px;
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
}

.page-about .about-partner p {
  margin: 0;
  font-size: 15px;
  line-height: 1.76;
  color: var(--muted);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: clamp(32px, 4vw, 64px);
    align-items: end;
  }

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

  .page-about .about-partners {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .page-about .about-shell {
    grid-template-columns: minmax(0, 1.62fr) minmax(230px, 0.78fr);
    column-gap: clamp(36px, 4.6vw, 80px);
    align-items: start;
  }

  .page-about .about-main {
    grid-column: 1;
    grid-row: 1;
    min-width: 0;
  }

  .page-about .about-rail {
    grid-column: 2;
    grid-row: 1;
    position: sticky;
    top: calc(var(--status-height) + 32px);
    max-height: calc(100vh - var(--status-height) - 64px);
    overflow-y: auto;
    padding-bottom: 24px;
  }

  .page-about .about-rail__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding: 0;
  }

  .page-about .about-rail__link {
    display: block;
    padding: 11px 0 11px 16px;
    border: none;
    border-left: 2px solid var(--line);
    border-radius: 0;
    white-space: normal;
    font-size: 14px;
  }

  .page-about .about-rail__link:hover,
  .page-about .about-rail__link:focus-visible {
    border-left-color: var(--signal);
    background: linear-gradient(90deg, rgba(63, 242, 208, 0.08), rgba(63, 242, 208, 0));
  }

  .page-about .about-rail__idx {
    display: inline-block;
    min-width: 24px;
  }

  .page-about .about-teams {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 32px;
  }

  .page-about .about-team + .about-team {
    margin-top: 0;
  }

  .page-about .about-section__title {
    max-width: 22ch;
  }

  .page-about .about-timeline__node {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 22px;
  }

  .page-about .about-timeline__year {
    font-size: 26px;
  }

  .page-about .about-figure--square {
    margin-left: 0;
    max-width: 340px;
  }
}

@media (min-width: 1280px) {
  .page-about .about-flow {
    padding-left: 34px;
  }

  .page-about .about-flow__item::before {
    left: -32px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-rail__link,
  .page-about .about-team {
    transition: none;
  }
}