.page-about {
  --about-rail-w: 216px;
  --about-soft: #4A443B;
  background: var(--cream);
  color: var(--ink);
  font-family: var(--font-body);
  overflow-x: clip;
}

/* ---------- 首屏：起笔 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(22px, 4vw, 40px) 0 clamp(38px, 6vw, 76px);
  background:
    repeating-linear-gradient(to right, rgba(201, 162, 39, .16) 0 1px, transparent 1px 98px),
    linear-gradient(180deg, var(--paper) 0%, var(--cream) 94%);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -90px;
  top: -90px;
  width: 340px;
  height: 340px;
  border-radius: 50%;
  background: radial-gradient(circle at 32% 32%, rgba(255, 90, 31, .16), transparent 68%);
  pointer-events: none;
}

.page-about .about-hero__inner {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
  margin-top: clamp(20px, 3vw, 34px);
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(36px, 7.2vw, 80px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--deep);
  margin: 12px 0 0;
}

.page-about .about-hero__lead {
  margin: clamp(16px, 2.2vw, 24px) 0 0;
  max-width: 52ch;
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.85;
  color: var(--soft);
}

.page-about .about-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin: clamp(20px, 2.8vw, 30px) 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--muted);
}

.page-about .about-hero__facts b {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--deep);
  margin-right: 4px;
}

.page-about .about-hero__gauge {
  border: 1px solid var(--line);
  background: var(--paper);
  padding: 16px;
  display: grid;
  gap: 12px;
  align-content: space-between;
  min-height: 190px;
}

.page-about .about-hero__gauge-head,
.page-about .about-hero__gauge-foot {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
}

.page-about .about-hero__gauge-head { color: var(--muted); }
.page-about .about-hero__gauge-foot { color: var(--orange-text); }

.page-about .about-hero__plot svg {
  display: block;
  width: 100%;
  height: auto;
}

/* ---------- 主体两栏 ---------- */
.page-about .about-body {
  padding: clamp(34px, 5.5vw, 78px) 0;
  background:
    repeating-linear-gradient(to right, rgba(232, 220, 200, .5) 0 1px, transparent 1px 98px);
}

.page-about .about-body__inner {
  display: grid;
  gap: clamp(24px, 4vw, 52px);
}

/* 刻度导航 */
.page-about .about-rail {
  background: var(--paper);
  border: 1px solid var(--line);
  padding: 12px 14px;
}

.page-about .about-rail__label {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--muted);
}

.page-about .about-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
}

.page-about .about-rail__link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  white-space: nowrap;
  padding: 7px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 13px;
  color: var(--deep);
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  border-color: var(--orange);
  color: var(--orange-text);
}

.page-about .about-rail__num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--orange-text);
}

/* ---------- 章节 ---------- */
.page-about .about-chapter {
  scroll-margin-top: 112px;
  padding-bottom: clamp(38px, 5.5vw, 70px);
}

.page-about .about-chapter + .about-chapter {
  padding-top: clamp(32px, 4.5vw, 58px);
  border-top: 1px solid var(--line);
}

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

.page-about .about-chapter__head {
  margin-bottom: clamp(16px, 2.4vw, 26px);
}

.page-about .about-chapter__num {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--orange-text);
}

.page-about .about-chapter__num::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--orange);
}

.page-about .about-chapter__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(25px, 3.4vw, 38px);
  line-height: 1.26;
  letter-spacing: -0.01em;
  color: var(--deep);
}

/* 正文流 */
.page-about .about-text p {
  margin: 0 0 1em;
  max-width: 64ch;
  font-size: 16px;
  line-height: 1.88;
  color: var(--soft);
}

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

.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: clamp(18px, 2.6vw, 26px) 0 0;
}

/* 图注区 */
.page-about .about-figure {
  margin: clamp(20px, 3vw, 32px) 0;
}

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

/* 引言块 */
.page-about .about-pull {
  margin: clamp(20px, 3vw, 32px) 0 0;
  padding: 6px 0 6px clamp(14px, 2vw, 20px);
  border-left: 3px solid var(--orange);
  font-family: var(--font-display);
  font-size: clamp(18px, 2.1vw, 23px);
  line-height: 1.62;
  color: var(--deep);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  position: relative;
  margin: 0;
  padding: 6px 0 0 34px;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold), var(--line) 88%);
}

.page-about .about-timeline__item {
  position: relative;
  padding-bottom: clamp(22px, 3vw, 32px);
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 7px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--cream);
  border: 2px solid var(--orange);
}

.page-about .about-timeline__year {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--orange-text);
}

.page-about .about-timeline__title {
  margin: 0 0 6px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 17px;
  line-height: 1.5;
  color: var(--deep);
}

.page-about .about-timeline__text {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: 12px;
  margin-top: clamp(14px, 2vw, 20px);
}

.page-about .about-team__item {
  background: var(--paper);
  border: 1px solid var(--line);
  border-top: 3px solid var(--orange);
  padding: 16px 16px 18px;
}

.page-about .about-team__count {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(28px, 4.4vw, 40px);
  line-height: 1;
  color: var(--deep);
}

.page-about .about-team__count small {
  margin-left: 6px;
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 13px;
  color: var(--muted);
}

.page-about .about-team__name {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  color: var(--deep);
}

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

/* ---------- 治理深色块 ---------- */
.page-about .about-deep {
  background: var(--deep);
  color: var(--cream);
  padding: clamp(22px, 3.4vw, 40px);
  border-radius: 4px;
  background-image:
    repeating-linear-gradient(to right, rgba(201, 162, 39, .18) 0 1px, transparent 1px 64px);
}

.page-about .about-deep p {
  margin: 0 0 1em;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.88;
  color: rgba(247, 241, 230, .88);
}

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

/* ---------- 合作生态 ---------- */
.page-about .about-partners {
  list-style: none;
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-partners__item {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  background: var(--paper);
  padding: 16px 16px 18px;
}

.page-about .about-partners__index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--cobalt);
  padding-top: 3px;
}

.page-about .about-partners__title {
  margin: 0 0 5px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  color: var(--deep);
}

.page-about .about-partners__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-partners + .about-text {
  margin-top: clamp(16px, 2.4vw, 22px);
}

/* ---------- 资质 ---------- */
.page-about .about-creds {
  display: grid;
  gap: 12px;
}

.page-about .about-creds__item {
  border-left: 2px solid var(--line);
  padding: 4px 0 4px 14px;
}

.page-about .about-creds__label {
  margin: 0 0 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--orange-text);
}

.page-about .about-creds__value {
  margin: 0;
  font-size: 16px;
  line-height: 1.7;
  color: var(--deep);
  font-weight: 500;
}

/* ---------- 到访 ---------- */
.page-about .about-visit {
  display: grid;
  gap: 12px;
}

.page-about .about-visit__card {
  background: var(--paper);
  border: 1px solid var(--line);
  padding: 18px 18px 20px;
}

.page-about .about-visit__label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--muted);
}

.page-about .about-visit__value {
  margin: 0 0 8px;
  font-size: 16px;
  line-height: 1.7;
  color: var(--deep);
}

.page-about .about-visit__value:last-of-type { margin-bottom: 10px; }

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

/* ---------- 断点 ---------- */
@media (max-width: 559px) {
  .page-about .about-hero__title br { display: none; }
}

@media (min-width: 640px) {
  .page-about .about-team { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .page-about .about-creds { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .page-about .about-visit { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, .55fr);
    align-items: end;
  }
}

@media (min-width: 960px) {
  .page-about .about-body__inner {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: clamp(32px, 4vw, 64px);
  }

  .page-about .about-rail {
    position: sticky;
    top: 104px;
    align-self: start;
    background: transparent;
    border: 0;
    padding: 0;
  }

  .page-about .about-rail__label { padding-left: 14px; }

  .page-about .about-rail__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding: 0;
  }

  .page-about .about-rail__link {
    border: 0;
    border-left: 2px solid var(--line);
    border-radius: 0;
    padding: 9px 0 9px 14px;
    font-size: 14px;
    white-space: normal;
  }

  .page-about .about-rail__link:hover,
  .page-about .about-rail__link:focus-visible {
    border-left-color: var(--orange);
    background: rgba(255, 90, 31, .05);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-rail__link { transition: none; }
}
<<<END>>>

.page-about {
  --soft: currentColor;
}