.page-about {
  --about-line: rgba(232, 201, 138, 0.42);
}

.page-about .eyebrow {
  margin: 0 0 0.7rem;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: grid;
  border-bottom: var(--bw) solid var(--ink);
}

.page-about .about-hero__year {
  background: var(--slate);
  color: var(--sand);
  padding: clamp(1.6rem, 6vw, 3.2rem);
  border-bottom: var(--bw) solid var(--ink);
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.page-about .about-hero__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.22em;
  color: var(--gold-light);
}

.page-about .about-hero__years {
  margin: 0;
  font-family: var(--font-body);
  font-weight: 200;
  font-size: clamp(2.8rem, 13vw, 6.4rem);
  line-height: 0.9;
  letter-spacing: -0.05em;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0 0.12em;
}

.page-about .about-hero__years em {
  font-style: normal;
  color: var(--gold);
  font-size: 0.4em;
  letter-spacing: -0.02em;
}

.page-about .about-hero__ticks {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.55rem;
}

.page-about .about-hero__ticks li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  border-top: 1px solid var(--about-line);
  padding-top: 0.5rem;
}

.page-about .about-hero__tick-num {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--gold-light);
}

.page-about .about-hero__tick-label {
  font-size: 0.78rem;
  color: var(--slate-light);
}

.page-about .about-hero__intro {
  background: var(--sand);
  color: var(--ink);
  padding: clamp(1.6rem, 6vw, 3.2rem);
}

.page-about .about-hero__intro h1 {
  margin: 0;
  font-size: clamp(1.85rem, 6.4vw, 3.2rem);
  line-height: 1.12;
  letter-spacing: -0.03em;
  font-weight: 900;
}

.page-about .about-hero__lead {
  margin: 1.1rem 0 0;
  font-size: clamp(1rem, 2.4vw, 1.1rem);
  line-height: 1.8;
  max-width: 42ch;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.6rem;
}

/* ---------- 起点 ---------- */
.page-about .about-origin {
  padding-block: clamp(2.4rem, 6vw, 4.6rem);
  background: var(--sand);
}

.page-about .about-origin__grid {
  display: grid;
  gap: clamp(1.6rem, 3.5vw, 2.8rem);
}

.page-about .about-origin__text h2,
.page-about .about-timeline__head h2,
.page-about .about-team__head h2,
.page-about .about-net__copy h2,
.page-about .about-honor__head h2,
.page-about .about-promise__head h2 {
  margin: 0;
  font-size: clamp(1.5rem, 4.6vw, 2.3rem);
  line-height: 1.16;
  letter-spacing: -0.025em;
  font-weight: 900;
}

.page-about .about-origin__text p {
  margin: 1rem 0 0;
  line-height: 1.8;
  max-width: 56ch;
}

.page-about .about-origin__points {
  list-style: none;
  margin: 1.6rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

.page-about .about-origin__points li {
  border-left: var(--bw) solid var(--gold);
  padding: 0.15rem 0 0.15rem 0.9rem;
  font-size: 0.95rem;
  line-height: 1.7;
}

.page-about .about-origin__points strong {
  display: block;
  font-weight: 900;
  letter-spacing: -0.01em;
  margin-bottom: 0.15rem;
}

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

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  background: var(--slate-light);
  padding-block: clamp(2.4rem, 6vw, 4.6rem);
  border-top: var(--bw) solid var(--ink);
  border-bottom: var(--bw) solid var(--ink);
}

.page-about .about-timeline__lead {
  margin: 0.9rem 0 0;
  line-height: 1.8;
  max-width: 52ch;
}

.page-about .about-timeline__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1.6rem 0 2.2rem;
}

.page-about .about-timeline__nav a {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-decoration: none;
  color: var(--ink);
  background: var(--gold-light);
  border: 2px solid var(--ink);
  padding: 0.34rem 0.75rem;
  transition: background 160ms var(--ease), color 160ms var(--ease);
}

.page-about .about-timeline__nav a:hover,
.page-about .about-timeline__nav a:focus-visible {
  background: var(--flame);
  color: #fff;
}

.page-about .about-timeline__list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 2.4rem;
  position: relative;
}

.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  left: 0.58rem;
  top: 0.4rem;
  bottom: 0.4rem;
  width: 3px;
  background: linear-gradient(var(--gold), var(--flame));
}

.page-about .about-tl {
  position: relative;
  padding-bottom: 2.1rem;
}

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

.page-about .about-tl::before {
  content: "";
  position: absolute;
  left: -2.2rem;
  top: 0.7rem;
  width: 0.95rem;
  height: 0.95rem;
  background: var(--flame);
  border: 3px solid var(--ink);
  border-radius: 50%;
}

.page-about .about-tl__year {
  margin: 0 0 0.35rem;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  color: var(--flame);
}

.page-about .about-tl__body h3 {
  margin: 0 0 0.4rem;
  font-size: clamp(1.02rem, 2.6vw, 1.3rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.35;
}

.page-about .about-tl__body p {
  margin: 0;
  line-height: 1.75;
  max-width: 62ch;
}

.page-about .about-tl:target .about-tl__body h3 {
  background: var(--gold-light);
  box-shadow: 0 0 0 4px var(--gold-light);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  background: var(--slate);
  color: var(--sand);
  padding-block: clamp(2.4rem, 6vw, 4.6rem);
}

.page-about .about-team .eyebrow {
  color: var(--gold-light);
}

.page-about .about-team__head p {
  margin: 0.9rem 0 0;
  line-height: 1.8;
  max-width: 52ch;
  color: var(--slate-light);
}

.page-about .about-team__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 3px;
  background: var(--gold);
  border: var(--bw) solid var(--gold);
  margin-top: 2rem;
}

.page-about .about-team__stat {
  background: var(--slate);
  padding: 1rem 0.9rem;
}

.page-about .about-team__stat-num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(1.7rem, 5.2vw, 2.5rem);
  line-height: 1;
  color: var(--sand);
}

.page-about .about-team__stat-label {
  display: block;
  margin-top: 0.45rem;
  font-size: 0.8rem;
  line-height: 1.5;
  color: var(--gold-light);
}

.page-about .about-team__grid {
  display: grid;
  gap: clamp(1.6rem, 3.5vw, 2.6rem);
  margin-top: 2.2rem;
}

.page-about .about-team__copy p {
  margin: 0 0 1rem;
  line-height: 1.8;
  color: var(--slate-light);
}

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

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

/* ---------- 合作网络 ---------- */
.page-about .about-net {
  background: var(--sand);
  padding-block: clamp(2.4rem, 6vw, 4.6rem);
}

.page-about .about-net__grid {
  display: grid;
  gap: clamp(1.6rem, 3.5vw, 2.8rem);
}

.page-about .about-net__map {
  background: var(--indigo);
  border: var(--bw) solid var(--ink);
  box-shadow: var(--hard);
  padding: 1rem;
}

.page-about .about-net__svg {
  display: block;
  width: 100%;
  height: auto;
  max-width: 420px;
  margin: 0 auto;
}

.page-about .about-net__node circle {
  fill: var(--sand);
  stroke: var(--ink);
  stroke-width: 3;
  transition: fill 160ms var(--ease);
}

.page-about .about-net__node text {
  fill: var(--ink);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  text-anchor: middle;
  pointer-events: none;
}

.page-about .about-net__node:hover circle,
.page-about .about-net__node:focus-visible circle {
  fill: var(--flame);
}

.page-about .about-net__node:focus-visible {
  outline: 2px solid var(--gold-light);
}

.page-about .about-net__copy p {
  margin: 0.9rem 0 0;
  line-height: 1.8;
  max-width: 56ch;
}

.page-about .about-net__figure {
  margin: 1.6rem 0 0;
}

.page-about .about-net__frame {
  aspect-ratio: 4 / 3;
}

/* ---------- 荣誉 ---------- */
.page-about .about-honor {
  background: var(--cool, var(--slate-light));
  padding-block: clamp(2.4rem, 6vw, 4.6rem);
}

.page-about .about-honor__head p {
  margin: 0.9rem 0 0;
  line-height: 1.8;
  max-width: 54ch;
}

.page-about .about-honor__bar {
  margin: 1.6rem 0 2rem;
}

.page-about .about-honor__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1.1rem;
  padding-bottom: 0.6rem;
}

.page-about .about-honor__item {
  background: var(--sand);
  border: var(--bw) solid var(--ink);
  box-shadow: var(--hard-sm);
  padding: 1.1rem 1.05rem 1.2rem;
}

.page-about .about-honor__item h3 {
  margin: 0.7rem 0 0.45rem;
  font-size: 1.02rem;
  font-weight: 900;
  line-height: 1.4;
  letter-spacing: -0.015em;
}

.page-about .about-honor__item p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.7;
}

.page-about .about-honor__year {
  margin-top: 0.8rem !important;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.78rem !important;
  letter-spacing: 0.1em;
  color: var(--wine);
}

.page-about .about-honor__empty {
  margin: 0;
  padding: 1rem 1.1rem;
  border: 2px dashed var(--ink);
  font-size: 0.9rem;
}

/* ---------- 服务节奏 ---------- */
.page-about .about-promise {
  background: var(--indigo);
  color: var(--sand);
  padding-block: clamp(2.4rem, 6vw, 4.6rem);
}

.page-about .about-promise .eyebrow {
  color: var(--blue);
}

.page-about .about-promise__grid {
  display: grid;
  gap: 1.4rem;
  margin-top: 1.8rem;
}

.page-about .about-promise__item {
  border-top: var(--bw) solid var(--flame);
  padding-top: 0.9rem;
}

.page-about .about-promise__item h3 {
  margin: 0.7rem 0 0.45rem;
  font-size: 1.05rem;
  font-weight: 900;
  letter-spacing: -0.015em;
}

.page-about .about-promise__item p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--slate-light);
}

.page-about .about-promise__foot {
  margin-top: 2.2rem;
  border-top: 1px solid rgba(215, 225, 225, 0.3);
  padding-top: 1.4rem;
}

.page-about .about-promise__foot p {
  margin: 0;
  line-height: 1.8;
  max-width: 56ch;
  color: var(--sand);
}

.page-about .about-promise__links {
  list-style: none;
  margin: 1.2rem 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1.3rem;
}

.page-about .about-promise__links a {
  color: var(--gold-light);
  font-size: 0.92rem;
  text-decoration: none;
  border-bottom: 2px solid var(--blue);
  padding-bottom: 0.12rem;
}

.page-about .about-promise__links a:hover,
.page-about .about-promise__links a:focus-visible {
  color: var(--sand);
  border-bottom-color: var(--flame);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-team__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-promise__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.2rem;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: 40% 60%;
  }

  .page-about .about-hero__year {
    border-bottom: 0;
    border-right: var(--bw) solid var(--ink);
    justify-content: space-between;
  }

  .page-about .about-origin__grid {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: start;
  }

  .page-about .about-timeline__list {
    padding-left: 200px;
  }

  .page-about .about-timeline__list::before {
    left: 148px;
  }

  .page-about .about-tl::before {
    left: -56px;
    top: 0.55rem;
    width: 1.05rem;
    height: 1.05rem;
  }

  .page-about .about-tl__year {
    position: absolute;
    left: -200px;
    top: 0.35rem;
    width: 128px;
    text-align: right;
    margin: 0;
    font-size: 1.1rem;
  }

  .page-about .about-team__grid {
    grid-template-columns: 0.9fr 1.1fr;
    align-items: start;
  }

  .page-about .about-net__grid {
    grid-template-columns: 0.82fr 1.18fr;
    align-items: start;
  }

  .page-about .about-net__map {
    position: sticky;
    top: 1.5rem;
  }

  .page-about .about-honor__item:nth-child(even) {
    transform: translateY(14px);
  }

  .page-about .about-honor__grid {
    padding-bottom: 1.4rem;
  }
}

@media (min-width: 1200px) {
  .page-about .about-hero__years {
    font-size: 7rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-timeline__nav a,
  .page-about .about-net__node circle {
    transition: none;
  }
}
<<<END>>>

.page-about {
  --cool: transparent;
}