.page-about {
  --about-gap: clamp(48px, 7vw, 88px);
  --about-tight: clamp(28px, 4vw, 44px);
  background: var(--paper);
  color: var(--ink);
  overflow-x: hidden;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumbs {
  padding-top: 22px;
  padding-bottom: 4px;
}

.page-about .crumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--mono);
  font-size: .74rem;
  letter-spacing: .06em;
  color: var(--ink-2);
}

.page-about .crumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--mist);
}

.page-about .crumbs a {
  color: var(--ink-2);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .22s var(--ease), border-color .22s var(--ease);
}

.page-about .crumbs a:hover {
  color: var(--cinnabar);
  border-bottom-color: var(--cinnabar);
}

.page-about .crumbs [aria-current="page"] {
  color: var(--bronze);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: 30px 0 clamp(40px, 6vw, 68px);
}

.page-about .about-hero__inner {
  display: block;
}

.page-about .about-hero__tag {
  color: var(--cinnabar);
  margin: 0 0 14px;
  display: inline-block;
  padding-bottom: 4px;
  border-bottom: 1px solid rgba(196, 61, 43, .35);
}

.page-about .about-hero__title {
  margin: 0;
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(1.95rem, 6.4vw, 3.5rem);
  line-height: 1.16;
  letter-spacing: -0.012em;
  color: var(--ink);
  max-width: 15em;
}

.page-about .about-hero__lede {
  margin-top: 26px;
}

.page-about .about-hero__lede .lead {
  font-size: clamp(1rem, 2.4vw, 1.1rem);
  line-height: 1.85;
  color: var(--ink-2);
  margin: 0;
  max-width: 34em;
}

.page-about .about-hero__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 26px 0 0;
}

.page-about .about-hero__rule {
  display: flex;
  gap: 6px;
  margin-top: clamp(34px, 5vw, 56px);
}

.page-about .about-hero__rule span {
  display: block;
  height: 5px;
  border-radius: 999px;
  background: var(--stone);
}

.page-about .about-hero__rule span:nth-child(1) { flex: 3; background: var(--ink); }
.page-about .about-hero__rule span:nth-child(2) { flex: 2; background: var(--cinnabar); }
.page-about .about-hero__rule span:nth-child(3) { flex: 1; background: var(--bronze); }
.page-about .about-hero__rule span:nth-child(4) { flex: 2; }
.page-about .about-hero__rule span:nth-child(5) { flex: 1; }
.page-about .about-hero__rule span:nth-child(6) { flex: 4; background: var(--sand); }

/* ---------- 主体骨架 ---------- */
.page-about .about-body {
  display: block;
  padding: 0 0 clamp(60px, 9vw, 110px);
}

.page-about .about-rail {
  margin-bottom: var(--about-tight);
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.page-about .rail__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
}

.page-about .rail__link {
  display: inline-block;
  font-family: var(--mono);
  font-size: .78rem;
  letter-spacing: .04em;
  color: var(--ink-2);
  text-decoration: none;
  padding: 4px 0;
  border-bottom: 1px solid transparent;
  transition: color .22s var(--ease), border-color .22s var(--ease);
}

.page-about .rail__link:hover,
.page-about .rail__link.is-active {
  color: var(--cinnabar);
  border-bottom-color: var(--cinnabar);
}

.page-about .rail__link.is-active {
  font-weight: 600;
}

/* ---------- 章节 ---------- */
.page-about .about-chapter {
  padding: var(--about-gap) 0;
  border-top: 1px solid var(--line);
}

.page-about .about-chapter:first-child {
  border-top: none;
  padding-top: 0;
}

.page-about .about-chapter__title {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(1.45rem, 4.2vw, 2.05rem);
  line-height: 1.28;
  letter-spacing: -0.008em;
  margin: 12px 0 0;
  color: var(--ink);
  max-width: 20em;
}

.page-about .about-chapter__copy {
  margin-top: 22px;
  max-width: 38em;
}

.page-about .about-chapter__copy p {
  font-size: 1rem;
  line-height: 1.9;
  color: var(--ink-2);
  margin: 0 0 16px;
}

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

.page-about .about-chapter__copy strong {
  color: var(--ink);
  font-weight: 600;
}

/* 石青灰宽章节 */
.page-about .about-chapter--stone {
  background: var(--stone);
  margin-left: calc(50% - 50vw);
  margin-right: calc(50% - 50vw);
  padding-left: max(24px, calc(50vw - 590px + 24px));
  padding-right: max(24px, calc(50vw - 590px + 24px));
  border-top: none;
  position: relative;
}

.page-about .about-chapter--stone::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    90deg,
    rgba(17, 16, 14, .045) 0 1px,
    transparent 1px 46px
  );
  pointer-events: none;
}

.page-about .about-chapter--stone > * {
  position: relative;
}

/* 深墨章节 */
.page-about .about-chapter--ink {
  background: var(--deep);
  color: var(--paper);
  margin-left: calc(50% - 50vw);
  margin-right: calc(50% - 50vw);
  padding-left: max(24px, calc(50vw - 590px + 24px));
  padding-right: max(24px, calc(50vw - 590px + 24px));
  border-top: none;
}

.page-about .about-kicker--light {
  color: var(--sand);
}

.page-about .about-chapter__title--light {
  color: var(--paper);
}

.page-about .about-chapter__copy--light p {
  color: rgba(247, 242, 232, .78);
}

/* 大留白单句 */
.page-about .about-axiom {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(1.2rem, 3.6vw, 1.7rem);
  line-height: 1.62;
  color: var(--ink);
  margin: 34px 0 0;
  padding: 26px 0 26px 22px;
  border-left: 3px solid var(--cinnabar);
  max-width: 30em;
}

/* ---------- 图 ---------- */
.page-about .about-figure {
  margin: 34px 0 0;
}

.page-about .about-figure .figure__frame {
  overflow: hidden;
  border-radius: 4px;
  background: var(--stone);
}

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

.page-about .about-figure .figure__caption {
  margin-top: 12px;
  font-family: var(--mono);
  font-size: .74rem;
  letter-spacing: .05em;
  color: var(--ink-2);
  line-height: 1.6;
}

.page-about .about-figure--arch .figure__frame {
  border-radius: 120px 120px 4px 4px;
}

.page-about .about-figure--timeline .figure__frame {
  border-radius: 4px;
  background: rgba(46, 90, 73, .12);
}

/* ---------- 台账 ---------- */
.page-about .about-ledger {
  margin: 34px 0 0;
  border-top: 1px solid var(--line);
  max-width: 32em;
}

.page-about .about-ledger__row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 18px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-ledger dt {
  font-size: .86rem;
  color: var(--ink-2);
  letter-spacing: .02em;
}

.page-about .about-ledger dd {
  margin: 0;
  font-size: .9rem;
  font-weight: 600;
  color: var(--ink);
  text-align: right;
}

/* ---------- 分类标签簇 ---------- */
.page-about .about-cluster {
  margin-top: 30px;
}

.page-about .about-cluster__label {
  font-family: var(--mono);
  font-size: .74rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--bronze);
  margin: 0 0 12px;
}

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

.page-about .about-tags .tag {
  border: 1px solid var(--bronze-light);
  color: var(--bronze);
  background: rgba(46, 90, 73, .06);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: .82rem;
  line-height: 1.4;
  transition: background .22s var(--ease), color .22s var(--ease);
}

.page-about .about-tags .tag:hover {
  background: var(--bronze);
  color: var(--paper);
}

.page-about .about-cluster__note {
  margin: 16px 0 0;
  font-size: .88rem;
  line-height: 1.8;
  color: var(--ink-2);
  max-width: 34em;
}

/* ---------- 支持节奏 ---------- */
.page-about .about-support {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid rgba(247, 242, 232, .16);
}

.page-about .about-support__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 0;
  border-bottom: 1px solid rgba(247, 242, 232, .16);
}

.page-about .about-support__num {
  font-size: .84rem;
  letter-spacing: .04em;
  color: var(--sand);
}

.page-about .about-support__text {
  font-size: .94rem;
  line-height: 1.78;
  color: rgba(247, 242, 232, .82);
}

.page-about .about-contact-line {
  margin: 26px 0 0;
  font-size: .88rem;
  line-height: 1.8;
  color: rgba(247, 242, 232, .68);
}

.page-about .about-contact-line .mono {
  color: var(--paper);
}

/* ---------- 时间线 ---------- */
.page-about .about-chapter--timeline {
  border-top: none;
}

.page-about .about-timeline-wrap {
  margin-top: 32px;
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(180deg, var(--sand) 0%, var(--bronze-light) 55%, rgba(114, 146, 126, .12) 100%);
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 30px 34px;
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--paper);
  border: 1px solid var(--sand);
  transition: background .22s var(--ease), transform .22s var(--ease);
}

.page-about .about-timeline__item:hover::before {
  background: var(--cinnabar);
  border-color: var(--cinnabar);
  transform: scale(1.18);
}

.page-about .about-timeline__year {
  margin: 0;
  font-size: .82rem;
  letter-spacing: .08em;
  color: var(--cinnabar);
}

.page-about .about-timeline__name {
  margin: 6px 0 0;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.08rem;
  letter-spacing: .01em;
  color: var(--ink);
}

.page-about .about-timeline__text {
  margin: 8px 0 0;
  font-size: .93rem;
  line-height: 1.8;
  color: var(--ink-2);
  max-width: 32em;
}

/* ---------- 继续了解 ---------- */
.page-about .about-chapter--plain {
  border-top: none;
  padding-bottom: 0;
}

.page-about .about-routes {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-routes li {
  border-bottom: 1px solid var(--line);
}

.page-about .about-route {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) 20px;
  gap: 14px;
  align-items: center;
  padding: 16px 2px;
  text-decoration: none;
  color: var(--ink);
  transition: color .24s var(--ease), padding .24s var(--ease);
}

.page-about .about-route:hover {
  color: var(--cinnabar);
  padding-left: 10px;
}

.page-about .about-route__num {
  font-size: .8rem;
  color: var(--sand);
}

.page-about .about-route__main {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.page-about .about-route__title {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.02rem;
  letter-spacing: .01em;
}

.page-about .about-route__desc {
  font-size: .85rem;
  line-height: 1.65;
  color: var(--ink-2);
}

.page-about .about-route:hover .about-route__desc {
  color: var(--cinnabar-deep);
}

.page-about .about-route__arrow {
  font-size: 1rem;
  color: var(--mist);
  transition: transform .24s var(--ease), color .24s var(--ease);
}

.page-about .about-route:hover .about-route__arrow {
  color: var(--cinnabar);
  transform: translateX(4px);
}

.page-about .about-next-cta {
  margin: 32px 0 0;
}

/* ---------- 浮动联系 ---------- */
.page-about .about-float {
  position: fixed;
  right: 16px;
  bottom: 18px;
  z-index: 20;
  display: none;
  padding: 10px 18px;
  border-radius: 999px;
  background: var(--cinnabar);
  color: var(--paper);
  font-size: .84rem;
  letter-spacing: .05em;
  text-decoration: none;
  box-shadow: 0 8px 22px rgba(140, 41, 29, .26);
  transition: background .22s var(--ease), transform .22s var(--ease);
}

.page-about .about-float:hover {
  background: var(--cinnabar-deep);
  transform: translateY(-2px);
}

/* ---------- 滚动显现 ---------- */
.page-about .reveal {
  opacity: 1;
}

.page-about .js .reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .6s var(--ease), transform .6s var(--ease);
}

.page-about .js .reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .page-about .js .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ---------- 中等屏 ---------- */
@media (min-width: 680px) {
  .page-about .about-support {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 32px;
  }

  .page-about .about-timeline__item {
    padding-bottom: 36px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-about .about-float {
    display: inline-block;
  }

  .page-about .about-hero {
    padding: 44px 0 clamp(52px, 6vw, 80px);
  }

  .page-about .about-hero__inner {
    display: grid;
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    gap: clamp(40px, 6vw, 84px);
    align-items: end;
  }

  .page-about .about-hero__lede {
    margin-top: 0;
    padding-bottom: 8px;
  }

  .page-about .about-body {
    display: grid;
    grid-template-columns: 178px minmax(0, 1fr);
    gap: clamp(40px, 6vw, 80px);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: 104px;
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
    border-left: 1px solid var(--line);
    padding-left: 18px;
  }

  .page-about .rail__list {
    display: block;
  }

  .page-about .rail__list li {
    margin: 0 0 4px;
  }

  .page-about .rail__link {
    font-size: .8rem;
    padding: 5px 0;
  }

  .page-about .about-chapter--stone,
  .page-about .about-chapter--ink {
    border-radius: 4px;
    margin-left: 0;
    margin-right: 0;
    padding-left: clamp(28px, 4vw, 52px);
    padding-right: clamp(28px, 4vw, 52px);
  }

  .page-about .about-timeline-wrap {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 320px);
    gap: clamp(32px, 5vw, 64px);
    align-items: start;
  }

  .page-about .about-figure--timeline {
    margin-top: 6px;
  }

  .page-about .about-chapter__copy {
    max-width: 40em;
  }

  .page-about .about-timeline__item {
    padding-left: 40px;
    padding-bottom: 40px;
  }
}

/* ---------- 大屏 ---------- */
@media (min-width: 1180px) {
  .page-about .about-hero__title {
    max-width: 13em;
  }

  .page-about .about-axiom {
    margin-top: 48px;
    margin-bottom: 8px;
  }

  .page-about .about-body {
    grid-template-columns: 200px minmax(0, 1fr);
  }
}
</｜｜DSML｜｜ parameter>
</｜｜DSML｜｜ invoke>
</｜｜DSML｜｜ calls>