.page-about {
  --about-line: rgba(11, 42, 36, .12);
  --about-line-soft: rgba(11, 42, 36, .08);
  --about-axis: linear-gradient(180deg, var(--ld-cyan), var(--ld-flame));
  display: block;
}

/* ---------- 首屏框景 ---------- */
.page-about .about-hero {
  padding-top: clamp(1rem, 4vw, 2rem);
}

.page-about .about-hero__frame {
  position: relative;
  overflow: hidden;
  padding: clamp(1.6rem, 6vw, 3.6rem) clamp(1.15rem, 5vw, 3.6rem) clamp(1.8rem, 5vw, 3.2rem);
  border: var(--ld-hair);
  border-radius: var(--ld-radius);
  background:
    radial-gradient(120% 90% at 88% -10%, rgba(25, 227, 194, .20), rgba(25, 227, 194, 0) 60%),
    linear-gradient(170deg, rgba(255, 255, 255, .96), rgba(232, 240, 234, .72)),
    var(--ld-paper);
  box-shadow: var(--ld-shadow);
}

.page-about .about-hero__frame::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: min(46%, 320px);
  height: 16px;
  background-image: repeating-linear-gradient(90deg, rgba(11, 42, 36, .30) 0 1px, transparent 1px 12px);
  opacity: .75;
}

.page-about .about-hero__frame::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--ld-cyan) 0%, var(--ld-cyan-soft) 44%, var(--ld-flame) 100%);
}

.page-about .about-hero__title {
  margin: .85rem 0 1rem;
  max-width: 20ch;
  font-family: var(--ld-font-display);
  font-size: clamp(1.95rem, 8.4vw, 4.05rem);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -.03em;
  color: var(--ld-ink);
}

.page-about .about-hero__lede {
  max-width: 56ch;
  color: var(--ld-slate);
  line-height: 1.72;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 2rem 0 0;
  padding: 0;
  list-style: none;
  border: var(--ld-hair);
  border-radius: var(--ld-radius);
  background: var(--about-line);
  overflow: hidden;
}

.page-about .about-hero__stats > li {
  display: flex;
  flex-direction: column;
  gap: .25rem;
  padding: .95rem 1rem 1.05rem;
  background: var(--ld-white);
}

.page-about .about-hero__num {
  font-size: clamp(1.6rem, 6.4vw, 2.4rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--ld-cyan-deep);
}

.page-about .about-hero__cap {
  font-size: .78rem;
  letter-spacing: .06em;
  color: var(--ld-slate);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
  margin-top: 1.7rem;
}

/* ---------- 档案室入口 ---------- */
.page-about .about-index__head {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.5rem);
}

.page-about .about-index__title {
  margin: .55rem 0 .9rem;
  font-family: var(--ld-font-display);
  font-size: clamp(1.6rem, 5.8vw, 2.6rem);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--ld-ink);
}

.page-about .about-index__text {
  max-width: 52ch;
  margin: 0;
  color: var(--ld-slate);
  line-height: 1.72;
}

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

.page-about .about-index__list {
  display: grid;
  gap: 1px;
  margin: 2.25rem 0 0;
  padding: 0;
  list-style: none;
  border: var(--ld-hair);
  border-radius: var(--ld-radius);
  background: var(--about-line-soft);
  overflow: hidden;
}

.page-about .about-index__item {
  position: relative;
  padding: 1.35rem 1.2rem 1.45rem;
  background: var(--ld-paper);
}

.page-about .about-index__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--about-axis);
  opacity: .85;
}

.page-about .about-index__idx {
  display: block;
  font-size: .74rem;
  letter-spacing: .18em;
  color: var(--ld-cyan-deep);
}

.page-about .about-index__name {
  margin: .5rem 0 .45rem;
  font-size: 1.12rem;
  font-weight: 800;
  letter-spacing: .01em;
  color: var(--ld-ink);
}

.page-about .about-index__desc {
  margin: 0;
  font-size: .93rem;
  line-height: 1.68;
  color: var(--ld-slate);
}

/* ---------- 字段结构 ---------- */
.page-about .about-fields__grid {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
}

.page-about .about-fields__title {
  margin: .55rem 0 .9rem;
  font-family: var(--ld-font-display);
  font-size: clamp(1.6rem, 5.8vw, 2.6rem);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--ld-ink);
}

.page-about .about-fields__lede {
  max-width: 56ch;
  margin: 0;
  color: var(--ld-slate);
  line-height: 1.72;
}

.page-about .about-fields__group {
  margin-top: 1.7rem;
  padding-top: 1rem;
  border-top: var(--ld-hair);
}

.page-about .about-fields__group h3 {
  margin: 0;
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ld-cyan-deep);
}

.page-about .about-fields__chips {
  display: flex;
  flex-wrap: wrap;
  gap: .45rem;
  margin: .85rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-fields__note {
  margin: 1.8rem 0 0;
  font-size: .92rem;
  line-height: 1.72;
  color: var(--ld-slate);
}

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

.page-about .about-inline-link {
  color: var(--ld-cyan-deep);
  text-decoration: none;
  border-bottom: 1px solid rgba(10, 133, 116, .35);
}

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

/* ---------- 第 12 轮 ---------- */
.page-about .about-round__title {
  margin: .55rem 0 .9rem;
  font-family: var(--ld-font-display);
  font-size: clamp(1.55rem, 5.6vw, 2.5rem);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--ld-ink);
}

.page-about .about-round__text {
  max-width: 58ch;
  margin: 0;
  color: var(--ld-slate);
  line-height: 1.72;
}

.page-about .about-round__filters {
  margin-top: 1.6rem;
}

.page-about .about-round__grid {
  display: grid;
  gap: 1rem;
  margin-top: 1.6rem;
}

.page-about .about-round__card {
  display: flex;
  flex-direction: column;
  gap: .6rem;
  padding: 1.25rem 1.2rem 1.4rem;
  border: var(--ld-hair);
  border-top: 3px solid var(--ld-cyan);
  border-radius: var(--ld-radius);
  background: var(--ld-white);
  box-shadow: 0 1px 2px rgba(11, 42, 36, .04);
}

.page-about .about-round__card:nth-child(2) {
  border-top-color: var(--ld-cyan-soft);
}

.page-about .about-round__card:nth-child(3) {
  border-top-color: var(--ld-amber);
}

.page-about .about-round__card:nth-child(4) {
  border-top-color: var(--ld-flame);
}

.page-about .about-round__cardTitle {
  margin: 0;
  font-size: 1.06rem;
  font-weight: 800;
  color: var(--ld-ink);
}

.page-about .about-round__card p {
  margin: 0;
  font-size: .93rem;
  line-height: 1.68;
  color: var(--ld-slate);
}

.page-about .about-round__foot {
  margin: 1.6rem 0 0;
  font-size: .92rem;
  line-height: 1.72;
  color: var(--ld-slate);
}

/* ---------- 收录规模 ---------- */
.page-about .about-scale__title {
  margin: .55rem 0 .9rem;
  font-family: var(--ld-font-display);
  font-size: clamp(1.55rem, 5.6vw, 2.5rem);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--ld-ink);
}

.page-about .about-scale__text {
  max-width: 58ch;
  margin: 0;
  color: var(--ld-slate);
  line-height: 1.72;
}

.page-about .about-scale__band {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 2rem 0 0;
  padding: 0;
  list-style: none;
  border: var(--ld-hair);
  border-radius: var(--ld-radius);
  background: var(--ld-cyan);
  overflow: hidden;
}

.page-about .about-scale__cell {
  display: flex;
  flex-direction: column;
  gap: .3rem;
  padding: 1.3rem 1.15rem 1.4rem;
  background: var(--ld-mist);
}

.page-about .about-scale__num {
  font-size: clamp(1.5rem, 5.6vw, 2.2rem);
  font-weight: 700;
  line-height: 1;
  color: var(--ld-ink);
}

.page-about .about-scale__label {
  font-size: .8rem;
  letter-spacing: .05em;
  color: var(--ld-slate);
}

.page-about .about-scale__figure {
  margin: 1.75rem 0 0;
}

/* ---------- 发展历程 ---------- */
.page-about .about-timeline__title {
  margin: .6rem 0 0;
  max-width: 24ch;
  font-family: var(--ld-font-display);
  font-size: clamp(1.55rem, 5.6vw, 2.5rem);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--ld-white);
}

.page-about .about-timeline__list {
  display: grid;
  gap: 1.75rem;
  margin: 2.25rem 0 0;
  padding: 0 0 0 1.4rem;
  list-style: none;
  border-left: var(--ld-hair-dark);
}

.page-about .about-timeline__item {
  position: relative;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: calc(-1.4rem - 5px);
  top: .4rem;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ld-ink);
  border: 2px solid var(--ld-cyan);
}

.page-about .about-timeline__item:last-child::before {
  border-color: var(--ld-flame);
}

.page-about .about-timeline__era {
  display: block;
  font-size: .76rem;
  letter-spacing: .18em;
  color: var(--ld-cyan-soft);
}

.page-about .about-timeline__name {
  margin: .5rem 0 .45rem;
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--ld-white);
}

.page-about .about-timeline__item p {
  margin: 0;
  max-width: 60ch;
  font-size: .93rem;
  line-height: 1.7;
  color: rgba(232, 240, 234, .78);
}

/* ---------- 使用场景 ---------- */
.page-about .about-scenes__title {
  margin: .55rem 0 0;
  font-family: var(--ld-font-display);
  font-size: clamp(1.55rem, 5.6vw, 2.5rem);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--ld-ink);
}

.page-about .about-scenes__grid {
  display: grid;
  gap: 1rem;
  margin-top: 2rem;
}

.page-about .about-scenes__card {
  padding: 1.4rem 1.25rem 1.5rem;
  border: var(--ld-hair);
  border-radius: var(--ld-radius);
  background: linear-gradient(180deg, rgba(255, 255, 255, .94), rgba(232, 240, 234, .42));
}

.page-about .about-scenes__name {
  margin: 0;
  font-size: 1.08rem;
  font-weight: 800;
  color: var(--ld-ink);
}

.page-about .about-scenes__role {
  margin: .45rem 0 .8rem;
  font-size: .8rem;
  letter-spacing: .04em;
  color: var(--ld-cyan-deep);
}

.page-about .about-scenes__card p:last-child {
  margin: 0;
  font-size: .93rem;
  line-height: 1.7;
  color: var(--ld-slate);
}

/* ---------- 合作与认可 ---------- */
.page-about .about-trust__grid {
  display: grid;
  gap: clamp(1.75rem, 4vw, 2.75rem);
}

.page-about .about-trust__title {
  margin: .55rem 0 .9rem;
  font-family: var(--ld-font-display);
  font-size: clamp(1.55rem, 5.6vw, 2.4rem);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--ld-ink);
}

.page-about .about-trust__text {
  max-width: 58ch;
  margin: 0;
  color: var(--ld-slate);
  line-height: 1.72;
}

.page-about .about-trust__list {
  display: grid;
  gap: .9rem;
  margin: 1.75rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-trust__list > li {
  display: flex;
  align-items: baseline;
  gap: .85rem;
  padding-bottom: .85rem;
  border-bottom: var(--ld-hair);
}

.page-about .about-trust__k {
  flex: none;
  min-width: 3.4rem;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--ld-cyan-deep);
}

.page-about .about-trust__v {
  font-size: .92rem;
  line-height: 1.6;
  color: var(--ld-slate);
}

.page-about .about-trust__col--side {
  display: grid;
  gap: 1rem;
}

.page-about .about-trust__panel {
  padding: 1.35rem 1.25rem 1.5rem;
  border: var(--ld-hair);
  border-radius: var(--ld-radius);
  background: var(--ld-white);
}

.page-about .about-trust__panel--accent {
  background: linear-gradient(160deg, var(--ld-ink) 0%, var(--ld-ink-2) 100%);
  border-color: rgba(127, 245, 225, .22);
}

.page-about .about-trust__panelTitle {
  margin: 0 0 .6rem;
  font-size: 1rem;
  font-weight: 800;
  color: var(--ld-ink);
}

.page-about .about-trust__panelText {
  margin: 0;
  font-size: .92rem;
  line-height: 1.7;
  color: var(--ld-slate);
}

.page-about .about-trust__panel--accent .about-trust__panelTitle {
  color: var(--ld-white);
}

.page-about .about-trust__panel--accent .about-trust__panelText {
  color: rgba(232, 240, 234, .78);
}

.page-about .about-trust__panel--accent .ld-btn {
  margin-top: 1.1rem;
}

.page-about .about-trust__meta {
  display: grid;
  gap: .6rem;
  margin: 1.2rem 0 0;
}

.page-about .about-trust__metaRow {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: .55rem;
  border-bottom: var(--ld-hair);
}

.page-about .about-trust__metaRow dt {
  font-size: .84rem;
  color: var(--ld-slate);
}

.page-about .about-trust__metaRow dd {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--ld-ink);
}

/* ---------- 下一步 ---------- */
.page-about .about-next__inner {
  padding: clamp(1.6rem, 5vw, 3rem);
  border: var(--ld-hair);
  border-radius: var(--ld-radius);
  background:
    radial-gradient(120% 100% at 4% 0%, rgba(25, 227, 194, .16), rgba(25, 227, 194, 0) 58%),
    var(--ld-paper);
}

.page-about .about-next__title {
  margin: .55rem 0 .9rem;
  max-width: 24ch;
  font-family: var(--ld-font-display);
  font-size: clamp(1.5rem, 5.4vw, 2.35rem);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -.02em;
  color: var(--ld-ink);
}

.page-about .about-next__text {
  max-width: 56ch;
  margin: 0;
  color: var(--ld-slate);
  line-height: 1.72;
}

.page-about .about-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
  margin-top: 1.6rem;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-index__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

@media (min-width: 1024px) {
  .page-about .about-index__head {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, .98fr);
    align-items: center;
  }

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

  .page-about .about-fields__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
    align-items: start;
  }

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

  .page-about .about-trust__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: start;
  }

  .page-about .about-timeline__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(2rem, 4vw, 3.5rem);
    padding-left: 0;
    border-left: 0;
  }

  .page-about .about-timeline__item {
    padding-left: 1.4rem;
    border-left: var(--ld-hair-dark);
  }

  .page-about .about-timeline__item::before {
    left: -5px;
    top: .42rem;
  }
}

.page-about .ld-btn {
  text-decoration: none;
}

.page-about img {
  display: block;
  max-width: 100%;
  height: auto;
}