.page-about {
  --about-mark-w: 96px;
  --about-gap: 36px;
  --about-hair: rgba(10, 30, 51, .14);
  --about-ink: rgba(10, 30, 51, .82);
  background: var(--ly-paper);
  color: var(--ly-deep);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  background: var(--ly-deep);
  color: var(--ly-paper);
  padding: 30px 0 34px;
  overflow: hidden;
}

.page-about .about-hero__grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(22, 166, 161, .18) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(22, 166, 161, .13) 1px, transparent 1px);
  background-size: 68px 68px;
  -webkit-mask-image: radial-gradient(130% 100% at 18% 0%, #000 26%, transparent 76%);
  mask-image: radial-gradient(130% 100% at 18% 0%, #000 26%, transparent 76%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -60px;
  bottom: -80px;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(242, 106, 46, .22), transparent 68%);
  pointer-events: none;
}

.page-about .about-hero .ly-container {
  position: relative;
  z-index: 1;
}

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

.page-about .about-crumb .ly-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: .72rem;
  letter-spacing: .08em;
  color: rgba(245, 240, 230, .6);
}

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

.page-about .about-crumb a:hover,
.page-about .about-crumb a:focus-visible {
  color: var(--ly-shell);
  border-bottom-color: var(--ly-teal);
}

.page-about .about-hero__cols {
  display: grid;
  gap: 26px;
}

.page-about .about-hero h1 {
  font-family: var(--ly-font-display);
  font-size: clamp(2.05rem, 7.2vw, 4rem);
  line-height: 1.06;
  letter-spacing: .03em;
  font-weight: 700;
  margin: .24em 0 .5em;
  max-width: 12em;
}

.page-about .about-hero__intro {
  margin: 0;
  max-width: 36em;
  font-size: 1rem;
  line-height: 1.85;
  color: rgba(245, 240, 230, .82);
}

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

.page-about .about-collage__cell {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 13px 13px 15px;
  background: rgba(255, 253, 248, .05);
  border: 1px solid rgba(22, 166, 161, .34);
}

.page-about .about-collage__cell--wide {
  grid-column: 1 / -1;
  border-color: rgba(242, 106, 46, .52);
  background: rgba(242, 106, 46, .09);
}

.page-about .about-collage__k {
  font-size: .68rem;
  letter-spacing: .14em;
  color: rgba(245, 240, 230, .55);
}

.page-about .about-collage__v {
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--ly-shell);
}

.page-about .about-collage__cell--wide .about-collage__v {
  color: var(--ly-orange);
}

.page-about .about-collage__d {
  font-size: .78rem;
  line-height: 1.6;
  color: rgba(245, 240, 230, .66);
}

/* ---------- 章节跳转 ---------- */
.page-about .about-jump {
  background: var(--ly-shell);
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-jump__track {
  display: flex;
  gap: 8px;
  padding: 12px 0;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-about .about-jump a {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 7px 12px;
  border: 1px solid var(--about-hair);
  color: var(--ly-deep);
  text-decoration: none;
  font-size: .8rem;
  white-space: nowrap;
  transition: border-color .2s var(--ly-ease), color .2s var(--ly-ease);
}

.page-about .about-jump a .ly-mono {
  font-size: .68rem;
  color: var(--ly-rock);
  letter-spacing: .1em;
}

.page-about .about-jump a:hover,
.page-about .about-jump a:focus-visible {
  border-color: var(--ly-teal);
  color: var(--ly-teal-dim);
}

.page-about .about-jump a:hover .ly-mono,
.page-about .about-jump a:focus-visible .ly-mono {
  color: var(--ly-teal);
}

/* ---------- 章节主体 ---------- */
.page-about .about-flow {
  padding-top: 8px;
  padding-bottom: 12px;
}

.page-about .about-chapter {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  padding: 40px 0 44px;
  border-top: 1px solid var(--about-hair);
  scroll-margin-top: 20px;
}

.page-about .about-chapter:first-child {
  border-top: 0;
}

.page-about .about-chapter__mark {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.page-about .about-chapter__num {
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1;
  color: var(--ly-teal);
  letter-spacing: .04em;
}

.page-about .about-chapter__year {
  font-size: .72rem;
  letter-spacing: .14em;
  color: var(--ly-rock);
}

.page-about .about-chapter h2 {
  font-family: var(--ly-font-display);
  font-size: clamp(1.42rem, 4.6vw, 2rem);
  line-height: 1.24;
  letter-spacing: .015em;
  font-weight: 700;
  margin: 0 0 16px;
  color: var(--ly-deep);
}

.page-about .about-prose {
  max-width: 36em;
}

.page-about .about-prose p {
  margin: 0 0 1.05em;
  font-size: 1rem;
  line-height: 1.9;
  color: var(--about-ink);
}

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

.page-about .about-prose strong {
  color: var(--ly-deep);
  font-weight: 700;
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 24px 0 6px;
}

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

.page-about .about-figure figcaption {
  margin-top: 10px;
  font-size: .75rem;
  line-height: 1.7;
  letter-spacing: .04em;
  color: var(--ly-rock);
}

/* ---------- 展签 ---------- */
.page-about .about-plate {
  position: relative;
  margin: 24px 0 0;
  padding: 18px 18px 16px;
  background: var(--ly-shell);
  border: 1px solid var(--about-hair);
  box-shadow: 4px 4px 0 rgba(10, 30, 51, .07);
}

.page-about .about-plate::after {
  content: "";
  position: absolute;
  inset: 5px;
  border: 1px dashed rgba(10, 30, 51, .16);
  pointer-events: none;
}

.page-about .about-plate__k {
  display: inline-block;
  margin-bottom: 8px;
  font-size: .7rem;
  letter-spacing: .16em;
  color: var(--ly-clay);
}

.page-about .about-plate p {
  margin: 0;
  font-size: .94rem;
  line-height: 1.8;
  color: var(--about-ink);
}

/* ---------- 评测维度 ---------- */
.page-about .about-eval {
  margin: 26px 0 0;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-eval__item {
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-eval__sum {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 15px 2px;
  cursor: pointer;
  list-style: none;
  font-size: .95rem;
  font-weight: 600;
  color: var(--ly-deep);
  transition: color .2s var(--ly-ease);
}

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

.page-about .about-eval__sum::after {
  content: "+";
  margin-left: auto;
  font-family: var(--ly-font-mono);
  font-size: 1.1rem;
  line-height: 1;
  color: var(--ly-teal);
}

.page-about .about-eval__item[open] .about-eval__sum {
  color: var(--ly-teal-dim);
}

.page-about .about-eval__item[open] .about-eval__sum::after {
  content: "−";
}

.page-about .about-eval__item[open] .about-eval__sum .about-eval__idx {
  background: var(--ly-teal);
  color: var(--ly-shell);
}

.page-about .about-eval__idx {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 24px;
  width: 24px;
  height: 24px;
  border: 1px solid var(--ly-teal);
  color: var(--ly-teal-dim);
  font-size: .7rem;
  letter-spacing: .04em;
  transition: background .2s var(--ly-ease), color .2s var(--ly-ease);
}

.page-about .about-eval__body {
  padding: 0 2px 18px 38px;
  font-size: .93rem;
  line-height: 1.85;
  color: var(--about-ink);
}

.page-about .about-eval__body p {
  margin: 0 0 .7em;
}

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

.page-about .about-eval__ask {
  font-size: .85rem;
  color: var(--ly-rock);
  border-left: 2px solid var(--ly-mist);
  padding-left: 10px;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  list-style: none;
  margin: 22px 0 24px;
  padding: 0;
}

.page-about .about-team__item {
  position: relative;
  padding: 16px 16px 18px 19px;
  background: var(--ly-shell);
  border: 1px solid var(--about-hair);
  box-shadow: 3px 3px 0 rgba(10, 30, 51, .06);
}

.page-about .about-team__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--ly-moss);
}

.page-about .about-team__item:nth-child(2n)::before {
  background: var(--ly-teal);
}

.page-about .about-team__num {
  display: block;
  font-size: .68rem;
  letter-spacing: .12em;
  color: var(--ly-rock);
}

.page-about .about-team__name {
  margin: 7px 0 7px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--ly-deep);
}

.page-about .about-team__desc {
  margin: 0;
  font-size: .88rem;
  line-height: 1.75;
  color: var(--about-ink);
}

/* ---------- 合作与认可 ---------- */
.page-about .about-facts {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  list-style: none;
  margin: 24px 0 26px;
  padding: 0;
}

.page-about .about-facts__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 16px 18px;
  background: var(--ly-shell);
  border: 1px solid var(--about-hair);
  border-left: 3px solid var(--ly-moss);
}

.page-about .about-facts__item--teal {
  border-left-color: var(--ly-teal);
}

.page-about .about-facts__item--clay {
  border-left-color: var(--ly-clay);
}

.page-about .about-facts__k {
  font-size: .68rem;
  letter-spacing: .14em;
  color: var(--ly-rock);
}

.page-about .about-facts__v {
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.15;
  color: var(--ly-deep);
}

.page-about .about-facts__d {
  font-size: .82rem;
  line-height: 1.65;
  color: var(--about-ink);
}

/* ---------- 版本时间轴 ---------- */
.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: 24px 0 0;
  padding: 0 0 0 30px;
  border-left: 1px solid rgba(22, 166, 161, .42);
}

.page-about .about-timeline__node {
  position: relative;
  padding-bottom: 26px;
}

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

.page-about .about-timeline__node::before {
  content: "";
  position: absolute;
  left: -35px;
  top: 5px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ly-teal);
  box-shadow: 0 0 0 3px rgba(22, 166, 161, .18);
}

.page-about .about-timeline__node:last-child::before {
  background: var(--ly-orange);
  box-shadow: 0 0 0 3px rgba(242, 106, 46, .2);
}

.page-about .about-timeline__year {
  display: block;
  font-size: .74rem;
  letter-spacing: .16em;
  color: var(--ly-teal-dim);
  margin-bottom: 4px;
}

.page-about .about-timeline__title {
  margin: 0 0 6px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--ly-deep);
}

.page-about .about-timeline__desc {
  margin: 0;
  max-width: 32em;
  font-size: .9rem;
  line-height: 1.8;
  color: var(--about-ink);
}

/* ---------- 收尾入口 ---------- */
.page-about .about-next {
  background: var(--ly-deep);
  color: var(--ly-paper);
  padding: 44px 0 52px;
}

.page-about .about-next h2 {
  font-family: var(--ly-font-display);
  font-size: clamp(1.35rem, 4.4vw, 1.9rem);
  line-height: 1.25;
  letter-spacing: .02em;
  font-weight: 700;
  margin: .3em 0 0;
  max-width: 20em;
}

.page-about .about-next__links {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  background: rgba(215, 230, 230, .2);
  border: 1px solid rgba(215, 230, 230, .2);
}

.page-about .about-next__links a {
  display: block;
  height: 100%;
  padding: 18px;
  background: var(--ly-deep);
  color: var(--ly-paper);
  text-decoration: none;
  transition: background .2s var(--ly-ease);
}

.page-about .about-next__links a:hover,
.page-about .about-next__links a:focus-visible {
  background: var(--ly-deep-soft);
}

.page-about .about-next__t {
  display: block;
  font-size: 1rem;
  font-weight: 700;
  color: var(--ly-teal);
}

.page-about .about-next__d {
  display: block;
  margin-top: 7px;
  font-size: .84rem;
  line-height: 1.7;
  color: rgba(245, 240, 230, .72);
}

/* ---------- 断点 ---------- */
@media (min-width: 620px) {
  .page-about .about-team {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

@media (min-width: 860px) {
  .page-about .about-hero {
    padding: 38px 0 44px;
  }

  .page-about .about-hero__cols {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: end;
    gap: 40px;
  }

  .page-about .about-chapter {
    grid-template-columns: var(--about-mark-w) minmax(0, 1fr);
    gap: var(--about-gap);
    padding: 58px 0 62px;
  }

  .page-about .about-chapter__mark {
    display: block;
    position: sticky;
    top: 24px;
    align-self: start;
  }

  .page-about .about-chapter__num {
    display: block;
    font-size: 1.75rem;
  }

  .page-about .about-chapter__year {
    display: block;
    margin-top: 10px;
    font-size: .7rem;
  }

  .page-about .about-figure--offset {
    width: 88%;
    margin-left: auto;
  }

  .page-about .about-team {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 10px;
  }

  .page-about .about-eval__sum {
    padding: 17px 2px;
  }
}

@media (min-width: 1080px) {
  .page-about .about-hero {
    padding: 46px 0 56px;
  }

  .page-about .about-chapter {
    padding: 66px 0 72px;
  }

  .page-about .about-figure {
    margin: 30px 0 10px;
  }
}
<<<END>>>