.page-about {
  --about-cut: 14px;
  --about-gap: clamp(26px, 4vw, 56px);
  --about-sec-pad: clamp(38px, 6vw, 76px);
  position: relative;
  background: var(--dl-paper);
  color: var(--dl-inktext);
  font-family: var(--dl-sans);
  font-size: 15px;
  line-height: 1.85;
  overflow-x: clip;
}

.page-about [id] {
  scroll-margin-top: calc(var(--dl-header-h) + 26px);
}

.page-about a {
  color: inherit;
}

.page-about p {
  margin: 0 0 14px;
  max-width: 37em;
}

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

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  color: var(--dl-paper);
  background:
    radial-gradient(135% 100% at 82% -22%, var(--dl-ink-3) 0%, var(--dl-ink-2) 44%, var(--dl-ink) 100%);
  padding: calc(var(--dl-header-h) + clamp(34px, 6vw, 78px)) 0 clamp(38px, 6vw, 78px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, rgba(201, 194, 178, .10) 0 1px, transparent 1px 92px),
    repeating-linear-gradient(0deg, rgba(201, 194, 178, .07) 0 1px, transparent 1px 92px);
  mask-image: linear-gradient(105deg, transparent 0%, #000 34%, #000 100%);
  -webkit-mask-image: linear-gradient(105deg, transparent 0%, #000 34%, #000 100%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--dl-line-gold) 22%, var(--dl-line-gold) 78%, transparent);
}

.page-about .about-hero__shell {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(30px, 4.5vw, 52px);
}

.page-about .about-crumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  letter-spacing: .06em;
  color: rgba(245, 240, 230, .62);
  margin-bottom: 22px;
}

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

.page-about .about-crumb a:hover,
.page-about .about-crumb a:focus-visible {
  color: var(--dl-gold-soft);
  border-bottom-color: var(--dl-line-gold);
}

.page-about .about-crumb__sep {
  color: rgba(200, 162, 74, .6);
}

.page-about .about-crumb__cur {
  color: var(--dl-gold-soft);
}

.page-about .about-hero__title {
  margin: 14px 0 18px;
  font-family: var(--dl-serif);
  font-weight: 900;
  font-size: clamp(28px, 4.6vw, 50px);
  line-height: 1.24;
  letter-spacing: .01em;
  color: var(--dl-paper);
  max-width: 19em;
}

.page-about .about-hero__intro {
  font-size: clamp(14px, 1.15vw, 16px);
  line-height: 1.9;
  color: rgba(245, 240, 230, .82);
  max-width: 36em;
}

.page-about .about-hero__flags {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-hero__flags li {
  position: relative;
  padding-left: 20px;
  font-size: 13.5px;
  color: rgba(245, 240, 230, .74);
}

.page-about .about-hero__flags li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .78em;
  width: 10px;
  height: 1px;
  background: var(--dl-gold);
}

.page-about .about-hero__aside {
  align-self: end;
  padding: 24px 22px 22px;
  background:
    linear-gradient(160deg, rgba(30, 74, 61, .86) 0%, rgba(14, 43, 36, .66) 100%);
  border: 1px solid var(--dl-line-gold);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--about-cut)), calc(100% - var(--about-cut)) 100%, 0 100%);
}

.page-about .about-hero__stats {
  margin: 16px 0 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 18px;
}

.page-about .about-hero__stat dt {
  font-size: 12px;
  letter-spacing: .06em;
  color: rgba(245, 240, 230, .6);
  margin-bottom: 4px;
}

.page-about .about-hero__stat dd {
  margin: 0;
  font-size: 26px;
  line-height: 1.1;
  color: var(--dl-gold-soft);
}

/* ---------- 主体骨架 ---------- */

.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
  padding-top: clamp(30px, 4.5vw, 62px);
  padding-bottom: clamp(46px, 7vw, 96px);
}

.page-about .about-index {
  position: static;
  display: flex;
  flex-wrap: nowrap;
  gap: 6px;
  overflow-x: auto;
  scrollbar-width: none;
  padding-bottom: 6px;
}

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

.page-about .about-index .dl-index__link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 13px;
  border: 1px solid var(--dl-line);
  background: var(--dl-paper);
  color: var(--dl-muted);
  text-decoration: none;
  font-size: 12.5px;
  letter-spacing: .05em;
  white-space: nowrap;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 7px), calc(100% - 7px) 100%, 0 100%);
  transition: color .2s var(--dl-ease), border-color .2s var(--dl-ease), background-color .2s var(--dl-ease);
}

.page-about .about-index .dl-index__num {
  color: var(--dl-line);
  font-size: 11px;
  transition: color .2s var(--dl-ease);
}

.page-about .about-index .dl-index__link:hover,
.page-about .about-index .dl-index__link:focus-visible {
  color: var(--dl-ink);
  border-color: var(--dl-gold);
}

.page-about .about-index .dl-index__link[aria-current="true"] {
  color: var(--dl-paper);
  background: var(--dl-ink);
  border-color: var(--dl-ink);
}

.page-about .about-index .dl-index__link[aria-current="true"] .dl-index__num {
  color: var(--dl-gold);
}

/* ---------- 章节 ---------- */

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

.page-about .about-sec {
  position: relative;
  padding-block: var(--about-sec-pad);
}

.page-about .about-sec + .about-sec::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  transform: rotate(-.35deg);
  transform-origin: left center;
  background: linear-gradient(90deg, var(--dl-gold) 0 46px, var(--dl-line) 46px 100%);
  opacity: .8;
}

.page-about .about-sec__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 8px 16px;
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-about .about-sec__num {
  font-size: 13px;
  line-height: 2.1;
  color: var(--dl-gold);
  letter-spacing: .12em;
}

.page-about .about-sec__title {
  margin: 0 0 8px;
  font-family: var(--dl-serif);
  font-weight: 900;
  font-size: clamp(21px, 2.6vw, 30px);
  line-height: 1.35;
  color: var(--dl-ink);
}

.page-about .about-sec__lead {
  margin: 0;
  font-size: 14px;
  color: var(--dl-muted);
  max-width: 34em;
}

.page-about .about-sec__body {
  margin-left: 0;
}

/* ---------- 收益要点 ---------- */

.page-about .about-gains {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--dl-line);
  border-top: 1px solid var(--dl-line);
  border-bottom: 1px solid var(--dl-line);
}

.page-about .about-gains__item {
  background: var(--dl-paper);
  padding: 16px 16px 14px;
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
}

.page-about .about-gains__key {
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--dl-gold);
  padding-top: 3px;
}

.page-about .about-gains__item p {
  margin: 0;
  font-size: 14px;
  color: var(--dl-inktext);
  max-width: 32em;
}

/* ---------- 编号结构 ---------- */

.page-about .about-code {
  display: grid;
  gap: clamp(24px, 3.5vw, 42px);
}

.page-about .about-code__grid {
  display: grid;
  gap: 1px;
  background: var(--dl-line);
  border: 1px solid var(--dl-line);
}

.page-about .about-code__cell {
  background: var(--dl-paper-2);
  padding: 20px 18px 18px;
  display: grid;
  gap: 4px;
  align-content: start;
}

.page-about .about-code__val {
  font-size: clamp(26px, 3.4vw, 38px);
  line-height: 1.1;
  color: var(--dl-ink);
  letter-spacing: -.01em;
}

.page-about .about-code__key {
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--dl-gold);
  margin-bottom: 6px;
}

.page-about .about-code__cell p {
  font-size: 13.5px;
  color: var(--dl-muted);
  max-width: 30em;
}

.page-about .about-code__figure {
  margin: 0;
}

.page-about .about-code__figure .dl-figure__frame {
  border: 1px solid var(--dl-line);
  background: linear-gradient(150deg, var(--dl-ink-2) 0%, var(--dl-ink) 100%);
}

.page-about .about-code__figure .dl-figure__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .dl-figure__caption {
  margin-top: 10px;
  font-size: 12.5px;
  color: var(--dl-muted);
  line-height: 1.7;
}

/* ---------- 术语 ---------- */

.page-about .about-terms__figure {
  margin: 0 0 clamp(22px, 3vw, 34px);
}

.page-about .about-terms__figure .dl-figure__frame {
  border: 1px solid var(--dl-line);
  background: var(--dl-paper-2);
}

.page-about .about-terms__figure .dl-figure__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-terms {
  margin-top: 24px;
  display: grid;
  gap: 1px;
  background: var(--dl-line);
  border-top: 1px solid var(--dl-line);
  border-bottom: 1px solid var(--dl-line);
}

.page-about .about-terms__fold {
  background: var(--dl-paper);
}

.page-about .about-terms__trigger {
  width: 100%;
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr);
  align-items: baseline;
  gap: 4px 14px;
  padding: 15px 4px;
  background: none;
  border: 0;
  text-align: left;
  cursor: pointer;
  font: inherit;
  color: var(--dl-ink);
  transition: color .2s var(--dl-ease);
}

.page-about .about-terms__trigger:hover,
.page-about .about-terms__trigger:focus-visible {
  color: var(--dl-gold);
}

.page-about .about-terms__lvl {
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--dl-gold);
}

.page-about .about-terms__name {
  font-family: var(--dl-serif);
  font-weight: 700;
  font-size: 16px;
  line-height: 1.5;
}

.page-about .about-terms__hint {
  grid-column: 2;
  font-size: 13px;
  color: var(--dl-muted);
}

.page-about .about-terms__panel[hidden] {
  display: none;
}

.page-about .about-terms__panel .dl-fold__body {
  padding: 0 4px 18px 68px;
}

.page-about .about-terms__panel .dl-fold__body p {
  font-size: 13.5px;
  color: var(--dl-inktext);
  max-width: 34em;
}

.page-about .about-terms__meta {
  margin-top: 22px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 10px;
}

.page-about .about-terms__meta p {
  flex: 1 1 260px;
  font-size: 13px;
  color: var(--dl-muted);
  margin: 0;
}

.page-about .about-terms__meta a {
  color: var(--dl-ink);
  text-decoration: none;
  border-bottom: 1px solid var(--dl-gold);
  transition: color .2s var(--dl-ease);
}

.page-about .about-terms__meta a:hover,
.page-about .about-terms__meta a:focus-visible {
  color: var(--dl-gold);
}

.page-about .dl-tag {
  display: inline-block;
  padding: 4px 10px;
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--dl-ink);
  border: 1px solid var(--dl-line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%);
}

/* ---------- 周期 ---------- */

.page-about .about-cycle {
  margin-top: 26px;
  display: grid;
  gap: 1px;
  background: var(--dl-line);
  border: 1px solid var(--dl-line);
}

.page-about .about-cycle__phase {
  background: var(--dl-paper-2);
  padding: 20px 18px;
}

.page-about .about-cycle__idx {
  display: block;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--dl-gold);
  margin-bottom: 8px;
}

.page-about .about-cycle__name {
  margin: 0 0 8px;
  font-family: var(--dl-serif);
  font-weight: 700;
  font-size: 17px;
  color: var(--dl-ink);
}

.page-about .about-cycle__phase p {
  font-size: 13.5px;
  color: var(--dl-muted);
  max-width: 28em;
}

.page-about .about-cycle__note {
  margin-top: 20px;
  font-size: 13.5px;
  color: var(--dl-muted);
}

.page-about .about-cycle__note a {
  color: var(--dl-ink);
  text-decoration: none;
  border-bottom: 1px solid var(--dl-gold);
}

.page-about .about-cycle__note a:hover,
.page-about .about-cycle__note a:focus-visible {
  color: var(--dl-gold);
}

/* ---------- 团队 ---------- */

.page-about .about-team {
  padding: clamp(24px, 3.6vw, 40px) clamp(20px, 3vw, 36px);
  background:
    radial-gradient(120% 130% at 88% 0%, var(--dl-ink-3) 0%, var(--dl-ink-2) 46%, var(--dl-ink) 100%);
  color: var(--dl-paper);
  border: 1px solid var(--dl-line-gold);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--about-cut)), calc(100% - var(--about-cut)) 100%, 0 100%);
}

.page-about .about-team__grid {
  margin-top: 18px;
  display: grid;
  gap: 14px;
}

.page-about .about-team__card {
  border-left: 1px solid var(--dl-line-gold);
  padding-left: 16px;
}

.page-about .about-team__num {
  display: block;
  font-size: clamp(26px, 3.2vw, 36px);
  line-height: 1.1;
  color: var(--dl-gold-soft);
}

.page-about .about-team__role {
  display: block;
  margin: 4px 0 8px;
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--dl-gold);
}

.page-about .about-team__card p {
  font-size: 13px;
  line-height: 1.75;
  color: rgba(245, 240, 230, .76);
  max-width: 26em;
}

.page-about .about-team__rhythm {
  list-style: none;
  margin: 28px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--dl-line-gold);
  display: grid;
  gap: 12px;
}

.page-about .about-team__rhythm li {
  font-size: 13px;
  color: rgba(245, 240, 230, .78);
}

.page-about .about-team__rhythm .dl-mono {
  color: var(--dl-gold-soft);
  margin-right: 8px;
  letter-spacing: .04em;
}

.page-about .about-team__figure {
  margin: clamp(22px, 3vw, 34px) 0 0;
}

.page-about .about-team__figure .dl-figure__frame {
  border: 1px solid var(--dl-line);
  background: linear-gradient(160deg, var(--dl-ink-2) 0%, var(--dl-ink) 100%);
}

.page-about .about-team__figure .dl-figure__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 时间轴 ---------- */

.page-about .about-tl {
  margin-top: 8px;
}

.page-about .about-tl__chart {
  margin-bottom: 6px;
}

.page-about .about-tl__svg {
  display: block;
  width: 100%;
  height: clamp(66px, 9vw, 124px);
}

.page-about .about-tl__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .about-tl__item {
  position: relative;
  padding-top: 16px;
  border-top: 1px solid var(--dl-line);
  transition: border-color .24s var(--dl-ease);
}

.page-about .about-tl__item:hover,
.page-about .about-tl__item:focus-within {
  border-top-color: var(--dl-gold);
}

.page-about .about-tl__dot {
  position: absolute;
  top: -4px;
  left: 0;
  width: 7px;
  height: 7px;
  background: var(--dl-gold);
  transform: rotate(45deg);
}

.page-about .about-tl__season {
  margin: 0 0 6px;
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--dl-gold);
}

.page-about .about-tl__name {
  margin: 0 0 8px;
  font-family: var(--dl-serif);
  font-weight: 700;
  font-size: 16px;
  color: var(--dl-ink);
}

.page-about .about-tl__desc {
  margin: 0;
  font-size: 13px;
  line-height: 1.78;
  color: var(--dl-muted);
  max-width: 26em;
}

/* ---------- 末尾引导 ---------- */

.page-about .about-next {
  margin-top: clamp(30px, 4vw, 46px);
  padding-top: 22px;
  border-top: 1px solid var(--dl-line);
  display: grid;
  gap: 16px;
}

.page-about .about-next__text {
  margin: 0;
  font-size: 14px;
  color: var(--dl-inktext);
  max-width: 32em;
}

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

/* ---------- 响应式 ---------- */

@media (min-width: 620px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

  .page-about .about-team__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px 24px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__shell {
    grid-template-columns: minmax(0, 1fr) 320px;
    align-items: end;
  }

  .page-about .about-hero__aside {
    padding: 26px 24px 24px;
  }

  .page-about .about-body {
    grid-template-columns: 172px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: calc(var(--dl-header-h) + 26px);
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-index .dl-index__link {
    width: 100%;
    border: 0;
    border-left: 1px solid var(--dl-line);
    background: none;
    clip-path: none;
    padding: 9px 10px 9px 14px;
    white-space: normal;
  }

  .page-about .about-index .dl-index__link[aria-current="true"] {
    background: linear-gradient(90deg, rgba(200, 162, 74, .16), rgba(200, 162, 74, 0) 92%);
    border-left: 1px solid var(--dl-gold);
    color: var(--dl-ink);
  }

  .page-about .about-sec__head {
    grid-template-columns: 46px minmax(0, 1fr);
    gap: 6px 22px;
  }

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

  .page-about .about-gains__item {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
    padding: 20px 18px;
  }

  .page-about .about-code {
    grid-template-columns: minmax(0, 1fr) minmax(0, 360px);
    align-items: start;
  }

  .page-about .about-code__figure {
    margin-top: 0;
  }

  .page-about .about-team__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 22px;
  }

  .page-about .about-team__rhythm {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px 26px;
  }

  .page-about .about-tl__list {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .about-terms__panel .dl-fold__body {
    padding-left: 84px;
  }

  .page-about .about-next {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 24px;
  }
}

@media (min-width: 1180px) {
  .page-about .about-sec__body,
  .page-about .about-gains,
  .page-about .about-code,
  .page-about .about-cycle,
  .page-about .about-terms,
  .page-about .about-tl {
    max-width: 940px;
  }

  .page-about .about-team,
  .page-about .about-terms__figure {
    max-width: 1000px;
  }
}
<<<END>>>
</main>