.page-about {
  --about-rule: rgba(155, 171, 196, 0.14);
  --about-rule-strong: rgba(155, 171, 196, 0.3);
  --about-axis: rgba(255, 107, 26, 0.34);
  --about-slab: rgba(7, 20, 39, 0.72);
  background: var(--ink-800);
  color: var(--text);
  padding-bottom: clamp(48px, 8vw, 96px);
  overflow-x: hidden;
}

.page-about [id] {
  scroll-margin-top: calc(var(--header-h) + 28px);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding: calc(var(--header-h) + 18px) 0 clamp(36px, 6vw, 76px);
  background:
    radial-gradient(120% 100% at 6% -12%, rgba(255, 107, 26, 0.16) 0%, rgba(255, 107, 26, 0) 58%),
    linear-gradient(180deg, var(--ink-900) 0%, var(--ink-800) 100%);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 107, 26, 0.46) 22%, rgba(0, 201, 167, 0.28) 78%, transparent);
}

.page-about .about-crumb {
  margin-bottom: 20px;
}

.page-about .about-crumb .breadcrumb {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-about .about-hero__frame {
  position: relative;
  padding: clamp(26px, 5vw, 56px) clamp(20px, 4vw, 48px);
  border: 1px solid var(--about-rule-strong);
  background: var(--glass);
  backdrop-filter: blur(10px);
}

.page-about .about-hero__frame::before,
.page-about .about-hero__frame::after {
  content: "";
  position: absolute;
  width: 18px;
  height: 18px;
  border: 2px solid var(--orange);
}

.page-about .about-hero__frame::before {
  top: -1px;
  left: -1px;
  border-right: 0;
  border-bottom: 0;
}

.page-about .about-hero__frame::after {
  right: -1px;
  bottom: -1px;
  border-top: 0;
  border-left: 0;
}

.page-about .about-hero__index {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--orange);
}

.page-about .about-hero__title {
  margin: 16px 0 0;
  max-width: 17ch;
  font-size: clamp(34px, 6.6vw, 82px);
  font-weight: 200;
  letter-spacing: -0.02em;
  line-height: 1.02;
}

.page-about .about-hero__lede {
  margin: 24px 0 0;
  max-width: 64ch;
  font-size: 17px;
  line-height: 1.85;
  color: var(--text);
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 34px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--about-rule);
  background: var(--about-rule);
}

.page-about .about-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 16px;
  background: var(--about-slab);
}

.page-about .about-hero__facts .num {
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 500;
  line-height: 1;
  color: var(--orange);
}

.page-about .about-hero__facts em {
  font-style: normal;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

/* ---------- 通用章节 ---------- */

.page-about .about-section {
  padding-top: clamp(48px, 8vw, 96px);
}

.page-about .about-inline-note {
  margin: 28px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--orange);
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-inline-note a {
  color: var(--mint);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 01 建站口径 ---------- */

.page-about .about-scope {
  display: grid;
  gap: 18px;
  margin-top: 26px;
}

.page-about .about-scope__main,
.page-about .about-scope__side {
  padding: clamp(20px, 3.4vw, 34px);
}

.page-about .about-scope__title,
.page-about .about-scope__side-title {
  margin: 12px 0 0;
  font-size: clamp(20px, 2.6vw, 26px);
  font-weight: 900;
  letter-spacing: -0.01em;
  line-height: 1.28;
}

.page-about .about-scope__text {
  margin: 14px 0 0;
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
}

.page-about .about-scope__list {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-scope__list li {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2px 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-scope__list strong {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--orange);
}

.page-about .about-scope__list span {
  font-size: 14px;
  line-height: 1.65;
  color: var(--muted);
}

.page-about .about-scope__boundary {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: boundary;
}

.page-about .about-scope__boundary li {
  position: relative;
  padding: 12px 0 12px 26px;
  border-bottom: 1px solid var(--about-rule);
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
  counter-increment: boundary;
}

.page-about .about-scope__boundary li::before {
  content: counter(boundary, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--mint);
}

.page-about .about-scope__linkline {
  margin: 18px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-scope__linkline a {
  color: var(--mint);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 02 时间轴 ---------- */

.page-about .timeline {
  position: relative;
  margin: 30px 0 0;
  padding: 6px 0;
  list-style: none;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 17px;
  width: 1px;
  background: linear-gradient(180deg, transparent, var(--about-axis) 5%, var(--about-axis) 95%, transparent);
}

.page-about .timeline__item {
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr);
  gap: 0 18px;
  padding-bottom: clamp(30px, 5vw, 56px);
}

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

.page-about .timeline__node {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  margin-top: 4px;
  border: 1px solid var(--line-orange);
  border-radius: 50%;
  background: var(--ink-900);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--orange);
  text-decoration: none;
  transition: background 160ms var(--ease), color 160ms var(--ease), border-color 160ms var(--ease);
}

.page-about .timeline__node:hover,
.page-about .timeline__node:focus-visible {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--ink-900);
}

.page-about .timeline__card {
  padding: 4px 0 0;
}

.page-about .timeline__stage {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-about .timeline__title {
  margin: 10px 0 0;
  font-size: clamp(20px, 2.6vw, 26px);
  font-weight: 900;
  letter-spacing: -0.01em;
  line-height: 1.3;
}

.page-about .timeline__text {
  margin: 12px 0 0;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .timeline__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

/* ---------- 03 内容体系地图 ---------- */

.page-about .about-map__figure {
  margin: 26px 0 0;
}

.page-about .about-map__canvas-wrap {
  margin-top: 18px;
  padding: clamp(12px, 2.4vw, 24px);
  border: 1px solid var(--about-rule);
  background: rgba(7, 20, 39, 0.5);
  overflow-x: auto;
}

.page-about .about-map__canvas {
  display: block;
  width: 100%;
  min-width: 620px;
  height: auto;
  max-width: 100%;
}

.page-about .map-edge {
  fill: none;
  stroke: rgba(155, 171, 196, 0.4);
  stroke-width: 1.5;
}

.page-about .map-edge--dashed {
  stroke: rgba(0, 201, 167, 0.45);
  stroke-dasharray: 6 7;
}

.page-about .map-node rect {
  fill: rgba(18, 48, 92, 0.92);
  stroke: rgba(155, 171, 196, 0.28);
  stroke-width: 1;
  transition: stroke 160ms var(--ease), fill 160ms var(--ease);
}

.page-about .map-node text {
  fill: var(--text);
  font-family: var(--font-mono);
  font-size: 20px;
  letter-spacing: 0.03em;
  text-anchor: middle;
  dominant-baseline: middle;
}

.page-about .map-node--core rect {
  fill: rgba(255, 107, 26, 0.14);
  stroke: rgba(255, 107, 26, 0.55);
}

.page-about .map-node--core text {
  fill: var(--orange);
}

.page-about .map-node:hover rect {
  stroke: var(--mint);
}

.page-about .about-map__legend {
  margin-top: 22px;
}

.page-about .about-map__legend p {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-map__swatch {
  flex: 0 0 auto;
  width: 26px;
  height: 2px;
  margin-top: 11px;
}

.page-about .about-map__swatch--solid {
  background: rgba(155, 171, 196, 0.7);
}

.page-about .about-map__swatch--dashed {
  background: repeating-linear-gradient(90deg, var(--mint) 0 6px, transparent 6px 12px);
}

.page-about .about-map__legend a {
  color: var(--mint);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 04 编辑与校核 ---------- */

.page-about .about-editorial__figure {
  margin: 26px 0 0;
}

.page-about .about-team {
  display: grid;
  gap: 1px;
  margin-top: 28px;
  background: var(--about-rule);
  border-top: 1px solid var(--about-rule);
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-team__item {
  padding: 22px 18px;
  background: var(--ink-800);
}

.page-about .about-team__no {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.page-about .about-team__name {
  margin: 10px 0 0;
  font-size: 20px;
  font-weight: 900;
  letter-spacing: -0.01em;
}

.page-about .about-team__item p:last-child {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-flow {
  display: grid;
  gap: 18px;
  margin-top: 28px;
}

.page-about .about-step {
  padding: clamp(18px, 3vw, 26px);
  border: 1px solid var(--about-rule);
  border-top: 2px solid var(--orange);
  background: var(--ink-700);
}

.page-about .about-step__no {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.page-about .about-step__title {
  margin: 10px 0 0;
  font-size: 22px;
  font-weight: 900;
  letter-spacing: -0.01em;
}

.page-about .about-step__desc {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--muted);
}

.page-about .about-step__more {
  margin-top: 16px;
}

.page-about .about-step__more summary {
  padding-top: 12px;
  border-top: 1px solid var(--about-rule);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mint);
  cursor: pointer;
  list-style: none;
}

.page-about .about-step__more summary::-webkit-details-marker {
  display: none;
}

.page-about .about-step__more summary::after {
  content: " +";
  color: var(--mint);
}

.page-about .about-step__more[open] summary::after {
  content: " −";
}

.page-about .about-step__more dl {
  margin: 14px 0 0;
}

.page-about .about-step__more dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.page-about .about-step__more dd {
  margin: 4px 0 12px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text);
}

.page-about .about-rhythm {
  display: grid;
  gap: 14px;
  margin-top: 28px;
  padding: 20px 18px;
  border: 1px solid var(--about-rule);
  background: rgba(7, 20, 39, 0.55);
}

.page-about .about-rhythm__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--orange);
}

.page-about .about-rhythm__list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-rhythm__list li {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 05 俱乐部简史 ---------- */

.page-about .about-history {
  display: grid;
  gap: 24px;
  margin-top: 26px;
}

.page-about .about-history__figure {
  margin: 0;
  max-width: 420px;
}

.page-about .about-history__body {
  max-width: 70ch;
}

.page-about .about-history__body > p {
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text);
}

.page-about .about-history__rules {
  display: grid;
  gap: 1px;
  margin-top: 24px;
  background: var(--about-rule);
  border-top: 1px solid var(--about-rule);
}

.page-about .about-history__rule {
  padding: 16px 0;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-history__rule h3 {
  margin: 0;
  font-size: 16px;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--mint);
}

.page-about .about-history__rule p {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--muted);
}

.page-about .about-history__rule a,
.page-about .about-history__body a {
  color: var(--mint);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-history__body .muted {
  margin-top: 20px;
  font-size: 13px;
  line-height: 1.75;
}

/* ---------- 06 协作与生态 ---------- */

.page-about .about-partners {
  display: grid;
  gap: 18px;
  margin-top: 26px;
}

.page-about .about-partners__block {
  padding: clamp(20px, 3.2vw, 30px);
}

.page-about .about-partners__num {
  margin: 14px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(44px, 7vw, 68px);
  font-weight: 500;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--orange);
}

.page-about .about-partners__block h3 {
  margin: 12px 0 0;
  font-size: 19px;
  font-weight: 900;
  letter-spacing: -0.01em;
  line-height: 1.35;
}

.page-about .about-partners__block p:last-child {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--muted);
}

.page-about .about-partners__note {
  padding: 20px 18px;
  border-left: 2px solid var(--mint);
  background: rgba(0, 201, 167, 0.06);
}

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

.page-about .about-partners__note a {
  color: var(--mint);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 07 站务联系 ---------- */

.page-about .about-section--last {
  padding-bottom: clamp(8px, 2vw, 20px);
}

.page-about .about-contact {
  display: grid;
  gap: 24px;
  margin-top: 26px;
  padding: clamp(22px, 3.6vw, 36px);
  border: 1px solid var(--about-rule-strong);
  background: linear-gradient(160deg, rgba(255, 107, 26, 0.09) 0%, rgba(7, 20, 39, 0.6) 46%, rgba(18, 48, 92, 0.5) 100%);
}

.page-about .about-contact__lead p {
  margin: 0 0 20px;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text);
}

.page-about .about-contact__facts {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  background: var(--about-rule);
  border-top: 1px solid var(--about-rule);
}

.page-about .about-contact__facts > div {
  padding: 14px 0;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-contact__facts dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.page-about .about-contact__facts dd {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.7;
  word-break: break-word;
  color: var(--text);
}

.page-about .about-contact__caveat {
  margin: 0;
  font-size: 13px;
  line-height: 1.78;
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-scope__list li {
    grid-template-columns: minmax(140px, 0.36fr) minmax(0, 1fr);
    align-items: baseline;
    padding: 13px 0;
  }

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

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

  .page-about .about-rhythm {
    grid-template-columns: 140px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-rhythm__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .about-rhythm__list li {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

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

  .page-about .about-partners__note {
    grid-column: 1 / -1;
  }

  .page-about .about-contact__facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 28px;
  }
}

@media (min-width: 900px) {
  .page-about .about-scope {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 24px;
  }

  .page-about .about-history {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: clamp(24px, 4vw, 48px);
    align-items: start;
  }

  .page-about .about-history__figure {
    max-width: none;
  }

  .page-about .about-contact {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: clamp(24px, 4vw, 48px);
  }

  .page-about .about-contact__caveat {
    grid-column: 1 / -1;
  }
}

@media (min-width: 1024px) {
  .page-about .timeline::before {
    left: 50%;
  }

  .page-about .timeline__item {
    grid-template-columns: minmax(0, 1fr) 72px minmax(0, 1fr);
    gap: 0;
    align-items: start;
    padding-bottom: clamp(34px, 5vw, 64px);
  }

  .page-about .timeline__node {
    grid-column: 2;
    justify-self: center;
    margin-top: 6px;
  }

  .page-about .timeline__item--a .timeline__card {
    grid-column: 1;
    text-align: right;
    padding-right: clamp(18px, 3vw, 40px);
  }

  .page-about .timeline__item--b .timeline__card {
    grid-column: 3;
    padding-left: clamp(18px, 3vw, 40px);
  }

  .page-about .timeline__item--a .timeline__text {
    margin-left: auto;
  }

  .page-about .timeline__item--a .timeline__tags {
    justify-content: flex-end;
  }

  .page-about .about-hero__frame {
    padding-right: clamp(40px, 8vw, 120px);
  }
}
</｜｜DSML｜｜ parameter>
</｜｜DSML｜｜ invoke>
</｜｜DSML｜｜ calls>