.page-about .about-crumbs {
  padding-top: clamp(16px, 3vw, 30px);
}

/* ---------- 首屏 ---------- */
.page-about .about-lede {
  display: grid;
  gap: clamp(22px, 4vw, 46px);
  padding-block: clamp(20px, 4vw, 48px) clamp(22px, 3.6vw, 42px);
}

.page-about .about-kicker {
  color: var(--gold);
  font-size: 12px;
  letter-spacing: .22em;
  margin: 0 0 16px;
}

.page-about .about-title {
  margin: 0 0 22px;
  max-width: 14ch;
  line-height: 1.04;
  letter-spacing: -.01em;
}

.page-about .about-title em {
  display: block;
  font-style: normal;
  background: linear-gradient(98deg, var(--gold) 6%, #f0cf90 46%, var(--copper) 96%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-about .about-lede-text {
  max-width: 40ch;
  color: var(--paper-86);
}

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

.page-about .about-lede-side {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding-left: 16px;
  border-left: 2px solid var(--line);
}

.page-about .about-side-note {
  flex: 0 0 auto;
}

.page-about .about-facts {
  margin: 0;
  flex: 1 1 auto;
  min-width: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-facts > div {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--line-soft);
}

.page-about .about-facts dt {
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--mist);
}

.page-about .about-facts dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--gold);
}

/* ---------- 通栏图 ---------- */
.page-about .about-hero {
  margin-bottom: clamp(28px, 4vw, 52px);
}

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

/* ---------- 主体两栏 ---------- */
.page-about .about-grid {
  display: grid;
  gap: clamp(24px, 4vw, 46px);
  padding-bottom: clamp(46px, 7vw, 92px);
}

.page-about .about-rail {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-about .about-rail-note {
  display: none;
}

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

.page-about .about-toc a {
  display: block;
  padding: 8px 13px;
  font-size: 13.5px;
  line-height: 1.4;
  color: var(--paper-78);
  text-decoration: none;
  border: 1px solid var(--line-soft);
  background: rgba(28, 26, 34, .5);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 9px), calc(100% - 9px) 100%, 0 100%);
  transition: color var(--fast) var(--ease), border-color var(--fast) var(--ease), background var(--fast) var(--ease);
}

.page-about .about-toc a:hover,
.page-about .about-toc a:focus-visible {
  color: var(--neon);
  border-color: var(--neon);
  background: rgba(56, 225, 200, .08);
}

.page-about .about-toc .mono {
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--violet);
  margin-right: 8px;
}

/* ---------- 叙述流 ---------- */
.page-about .about-section {
  padding-block: clamp(26px, 4vw, 46px);
  scroll-margin-top: 108px;
}

.page-about .about-section > h2 {
  margin: 0 0 20px;
  max-width: 20ch;
  line-height: 1.14;
}

.page-about .about-idx {
  display: inline-block;
  margin: 0 0 14px;
  padding-left: 10px;
  border-left: 2px solid var(--violet);
  color: var(--mist);
  font-size: 12px;
  letter-spacing: .2em;
}

.page-about .about-section .prose {
  max-width: 40ch;
  color: var(--paper-86);
}

.page-about .about-section .prose + .prose {
  margin-top: 1.1em;
}

.page-about .about-dropcap::first-letter {
  float: left;
  font-family: var(--font-display);
  font-size: 3.1em;
  line-height: .88;
  padding: 4px 12px 0 0;
  color: var(--gold);
}

/* ---------- 斜切分隔带 ---------- */
.page-about .about-slash {
  height: 20px;
  background:
    linear-gradient(172deg, transparent 0 45%, var(--line) 45% 49%, transparent 49%),
    linear-gradient(176deg, transparent 0 66%, rgba(139, 92, 246, .38) 66% 68%, transparent 68%);
  background-repeat: no-repeat;
  background-size: 100% 100%;
  transform-origin: left center;
  transition: transform var(--slow) var(--ease), opacity var(--slow) var(--ease);
  opacity: .9;
}

.page-about .about-slash:hover {
  transform: translateX(12px) scaleX(.9);
  opacity: 1;
}

/* ---------- 栏目条目 ---------- */
.page-about .about-columns {
  list-style: none;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  display: grid;
  gap: clamp(14px, 2vw, 20px);
}

.page-about .about-col {
  padding: clamp(18px, 2.4vw, 26px);
  background: linear-gradient(158deg, rgba(92, 26, 43, .38), rgba(14, 11, 18, .92) 64%);
  border: 1px solid var(--line-soft);
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 20px 100%, 0 calc(100% - 20px));
  transition: border-color var(--mid) var(--ease), transform var(--mid) var(--ease), background var(--mid) var(--ease);
}

.page-about .about-col:hover {
  border-color: var(--gold);
  transform: translateY(-2px);
  background: linear-gradient(158deg, rgba(92, 26, 43, .52), rgba(14, 11, 18, .92) 64%);
}

.page-about .about-col-no {
  display: inline-block;
  margin-bottom: 12px;
  padding: 3px 9px;
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--neon);
  background: rgba(56, 225, 200, .1);
  clip-path: polygon(0 0, 100% 0, 100% 68%, 92% 100%, 0 100%);
}

.page-about .about-col h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(18px, 2.1vw, 22px);
  line-height: 1.3;
  color: var(--paper);
}

.page-about .about-col p {
  margin: 0 0 12px;
  max-width: 34ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--paper-78);
}

.page-about .about-col-note {
  padding-left: 10px;
  border-left: 2px solid var(--line);
  font-size: 13px;
  color: var(--mist);
  opacity: .78;
  transition: opacity var(--fast) var(--ease), color var(--fast) var(--ease);
}

.page-about .about-col:hover .about-col-note {
  opacity: 1;
  color: var(--neon);
}

.page-about .about-col-link {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--fast) var(--ease), border-color var(--fast) var(--ease);
}

.page-about .about-col-link:hover,
.page-about .about-col-link:focus-visible {
  color: var(--neon);
  border-bottom-color: var(--neon);
}

/* ---------- 维护区块（下沉一层色） ---------- */
.page-about .about-deep {
  background: linear-gradient(150deg, rgba(92, 26, 43, .55), rgba(28, 26, 34, .88) 72%);
  padding: clamp(24px, 4vw, 44px) clamp(18px, 3.4vw, 40px);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 28px), calc(100% - 28px) 100%, 0 100%);
  border-left: 1px solid rgba(230, 178, 90, .22);
}

.page-about .about-deep .about-idx {
  color: var(--gold);
  border-left-color: var(--gold);
}

.page-about .about-figure {
  margin: clamp(22px, 3vw, 32px) 0;
}

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

.page-about .about-steps {
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .about-steps li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px;
  align-items: baseline;
  padding: 12px 0;
  border-bottom: 1px dashed var(--line-soft);
  font-size: 15px;
  line-height: 1.72;
  color: var(--paper-78);
}

.page-about .about-steps .mono {
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--violet);
  white-space: nowrap;
}

/* ---------- 适用人群 ---------- */
.page-about .about-who {
  list-style: none;
  margin: clamp(22px, 3vw, 30px) 0 0;
  padding: 0;
  display: grid;
  gap: clamp(14px, 2vw, 18px);
}

.page-about .about-who li {
  padding: clamp(16px, 2.2vw, 22px);
  border-top: 2px solid var(--copper);
  background: linear-gradient(180deg, rgba(138, 90, 59, .16), transparent 72%);
  transition: border-color var(--mid) var(--ease), background var(--mid) var(--ease);
}

.page-about .about-who li:hover {
  border-top-color: var(--neon);
  background: linear-gradient(180deg, rgba(56, 225, 200, .14), transparent 72%);
}

.page-about .about-who h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(17px, 1.9vw, 20px);
  line-height: 1.35;
  color: var(--paper);
}

.page-about .about-who p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--paper-78);
}

/* ---------- 联系 ---------- */
.page-about .about-contact {
  margin-top: clamp(20px, 3vw, 30px);
  padding: clamp(20px, 3vw, 30px);
  background: linear-gradient(120deg, rgba(230, 178, 90, .14), rgba(14, 11, 18, .45) 62%);
  border-left: 3px solid var(--gold);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-about .about-contact-note {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .about-inline-link {
  color: var(--neon);
  text-decoration: none;
  border-bottom: 1px solid rgba(56, 225, 200, .4);
  transition: border-color var(--fast) var(--ease);
}

.page-about .about-inline-link:hover,
.page-about .about-inline-link:focus-visible {
  border-bottom-color: var(--neon);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-columns {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-columns > li:nth-child(even) {
    margin-top: 22px;
  }
}

@media (min-width: 900px) {
  .page-about .about-lede {
    grid-template-columns: minmax(0, 1.4fr) minmax(230px, .6fr);
    align-items: start;
  }

  .page-about .about-lede-side {
    margin-top: 44px;
  }
}

@media (min-width: 760px) {
  .page-about .about-who {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .page-about .about-grid {
    grid-template-columns: minmax(140px, 186px) minmax(0, 1fr);
    gap: clamp(34px, 5vw, 76px);
  }

  .page-about .about-rail {
    position: sticky;
    top: 104px;
  }

  .page-about .about-rail-note {
    display: block;
    margin: 0 0 6px;
    color: var(--gold);
    font-size: 12px;
    letter-spacing: .18em;
  }

  .page-about .about-toc {
    flex-direction: column;
    gap: 0;
  }

  .page-about .about-toc li + li {
    border-top: 1px solid var(--line-soft);
  }

  .page-about .about-toc a {
    border: 0;
    background: none;
    clip-path: none;
    padding: 11px 0 11px 12px;
    border-left: 2px solid transparent;
    transition: color var(--fast) var(--ease), border-color var(--fast) var(--ease), padding-left var(--fast) var(--ease);
  }

  .page-about .about-toc a:hover,
  .page-about .about-toc a:focus-visible {
    border-left-color: var(--neon);
    padding-left: 16px;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .about-col,
  .page-about .about-slash,
  .page-about .about-toc a,
  .page-about .about-who li {
    transition: none;
  }
}