.page-about {
  --about-rail: 190px;
  --about-line: rgba(58, 68, 70, 0.16);
  --about-gold-line: rgba(201, 162, 75, 0.28);
  background: var(--paper-white);
  color: var(--ink);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(178deg, var(--paper) 0%, var(--paper-white) 88%);
  border-bottom: 1px solid var(--about-gold-line);
}
.page-about .about-hero::after {
  content: "鼎";
  position: absolute;
  right: -4%;
  top: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(200px, 34vw, 420px);
  line-height: 0.86;
  color: rgba(201, 162, 75, 0.075);
  pointer-events: none;
  user-select: none;
}
.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  padding-block: clamp(24px, 4vw, 44px) clamp(36px, 6vw, 72px);
}
.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 5.6vw, 66px);
  line-height: 1.14;
  letter-spacing: -0.015em;
  max-width: 15em;
  margin: clamp(14px, 2vw, 22px) 0 clamp(18px, 2.6vw, 28px);
}
.page-about .about-hero__lead {
  max-width: 34em;
  margin: 0;
  font-size: clamp(16px, 1.6vw, 19px);
  line-height: 1.82;
  color: var(--rock-700);
}
.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: clamp(28px, 4vw, 46px) 0 0;
  max-width: 760px;
  border-top: 1px solid var(--about-line);
}
.page-about .about-fact {
  padding: 16px 16px 16px 0;
  border-bottom: 1px solid var(--about-line);
}
.page-about .about-fact dt {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--rock-700);
}
.page-about .about-fact dd {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.2vw, 38px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

/* ---------- 主体骨架 ---------- */
.page-about .about-body {
  display: grid;
  gap: clamp(24px, 4vw, 56px);
  padding-block: clamp(34px, 5vw, 70px) clamp(46px, 6vw, 88px);
}
.page-about .about-index__title {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--gold);
}
.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0 0 8px;
  display: flex;
  gap: 6px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.page-about .about-index__list li {
  flex: 0 0 auto;
}
.page-about .about-index__list .spy-link {
  display: block;
  padding: 9px 12px;
  font-size: 13px;
  line-height: 1.2;
  white-space: nowrap;
  color: var(--rock-700);
  text-decoration: none;
  border: 1px solid var(--about-line);
  border-radius: 2px;
  transition: color 0.16s ease, border-color 0.16s ease, background-color 0.16s ease;
}
.page-about .about-index__list .spy-link:hover {
  color: var(--ink);
  border-color: var(--about-gold-line);
}
.page-about .about-index__list .spy-link.is-active {
  color: var(--ink);
  border-color: var(--gold);
  background: rgba(201, 162, 75, 0.1);
}

.page-about .about-chapter {
  padding-block: clamp(30px, 4.4vw, 54px);
  border-top: 1px solid var(--about-line);
  scroll-margin-top: 132px;
}
.page-about .about-chapter:first-child {
  border-top: 0;
  padding-top: 0;
}
.page-about .chapter-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: clamp(16px, 2vw, 24px);
}
.page-about .chapter-head__no {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--gold);
  padding-bottom: 3px;
  border-bottom: 2px solid var(--gold);
}
.page-about .chapter-head h2 {
  flex: 0 1 auto;
  margin: 0;
}
.page-about .chapter-head::after {
  content: "";
  flex: 1 1 auto;
  height: 1px;
  background: var(--about-line);
}
.page-about .chapter-lead {
  max-width: 36em;
  margin: 0 0 clamp(20px, 3vw, 32px);
  padding-left: clamp(14px, 2vw, 20px);
  border-left: 2px solid var(--gold);
  font-size: clamp(16px, 1.7vw, 19px);
  line-height: 1.82;
  color: var(--rock-700);
}
.page-about .chapter-text p {
  margin: 0 0 1.05em;
  font-size: 16px;
  line-height: 1.88;
  color: var(--ink);
}
.page-about .chapter-text p:last-child {
  margin-bottom: 0;
}
.page-about .chapter-split {
  display: grid;
  gap: clamp(18px, 3vw, 36px);
  align-items: start;
}
.page-about .media-frame__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  filter: saturate(0.84) contrast(1.03);
}
.page-about .about-forward-media {
  margin-top: clamp(22px, 3vw, 36px);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  position: relative;
  padding-left: 26px;
}
.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 16px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold) 0%, rgba(201, 162, 75, 0.1) 100%);
}
.page-about .tl-item {
  position: relative;
  padding-bottom: clamp(14px, 2vw, 22px);
}
.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: -26.5px;
  top: 9px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(243, 235, 221, 0.92);
}
.page-about .tl-item__year {
  margin: 0 0 4px;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
}
.page-about .tl-item__head {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
}
.page-about .tl-item .accordion__trigger {
  font-family: var(--font-body);
  font-size: clamp(15px, 1.6vw, 17px);
  font-weight: 700;
  line-height: 1.55;
  color: var(--ink);
}
.page-about .tl-item__body {
  padding-top: 4px;
}
.page-about .tl-item__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--rock-700);
}

/* ---------- 空间列表 ---------- */
.page-about .space-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}
.page-about .space-list li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  padding: 16px 0;
  border-bottom: 1px solid var(--about-line);
}
.page-about .space-list li:first-child {
  padding-top: 0;
}
.page-about .space-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}
.page-about .space-list__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--lake);
  padding-top: 4px;
}
.page-about .space-list h3 {
  margin: 0 0 6px;
  font-size: 17px;
  line-height: 1.4;
}
.page-about .space-list p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--rock-700);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: 2px;
  border-top: 1px solid var(--about-line);
}
.page-about .team-row {
  padding: 16px 0;
  border-bottom: 1px solid var(--about-line);
}
.page-about .team-row:last-child {
  border-bottom: 0;
}
.page-about .team-row__main {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 9px;
}
.page-about .team-row__label {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}
.page-about .team-row__num {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--lake);
  font-variant-numeric: tabular-nums;
}
.page-about .team-row__track {
  height: 6px;
  border-radius: 3px;
  background: rgba(58, 68, 70, 0.1);
  overflow: hidden;
}
.page-about .team-row__bar {
  display: block;
  height: 100%;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--lake) 0%, var(--gold) 100%);
  transition: filter 0.18s ease;
}
.page-about .team-row__bar--a { width: 31.6%; }
.page-about .team-row__bar--b { width: 23.7%; }
.page-about .team-row__bar--c { width: 28.9%; }
.page-about .team-row__bar--d { width: 15.8%; }
.page-about .team-row:hover .team-row__bar {
  filter: brightness(1.14);
}
.page-about .team-row__role {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--rock-700);
}

/* ---------- 会员回访 ---------- */
.page-about .about-revisit {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  border-top: 1px solid var(--about-line);
}
.page-about .about-revisit li {
  display: grid;
  gap: 6px;
  padding: 20px 0;
  border-bottom: 1px solid var(--about-line);
}
.page-about .about-revisit .num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--gold);
}
.page-about .about-revisit h3 {
  margin: 0;
  font-size: 17px;
  line-height: 1.4;
}
.page-about .about-revisit p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--rock-700);
}

/* ---------- 合作与环形图 ---------- */
.page-about .about-partner-grid {
  display: grid;
  gap: clamp(22px, 3vw, 40px);
  align-items: center;
}
.page-about .about-partner-grid .arrow-link {
  display: inline-block;
  margin-top: 6px;
}
.page-about .about-orbit-wrap {
  margin: 0;
}
.page-about .about-orbit {
  display: block;
  width: 100%;
  max-width: 400px;
  height: auto;
  margin: 0 auto;
}
.page-about .orbit-num {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  fill: var(--gold);
  font-variant-numeric: tabular-nums;
}
.page-about .orbit-label {
  font-family: var(--font-body);
  font-size: 10px;
  fill: var(--rock-700);
}
.page-about .orbit-label--wide {
  font-size: 11px;
  fill: var(--ink);
}
.page-about .orbit-center-a {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 900;
  fill: var(--paper);
}
.page-about .orbit-center-b {
  font-family: var(--font-body);
  font-size: 10px;
  letter-spacing: 0.16em;
  fill: var(--gold-soft);
}
.page-about .orbit-caption {
  margin-top: 10px;
  text-align: center;
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--rock-700);
}

/* ---------- 联系 ---------- */
.page-about .about-contact {
  background: var(--rock-900);
  color: var(--paper);
  padding-block: clamp(40px, 6vw, 80px);
  border-top: 3px solid var(--gold);
}
.page-about .about-contact h2 {
  margin: 10px 0 14px;
  color: var(--paper);
  max-width: 20em;
}
.page-about .about-contact__lead {
  max-width: 34em;
  margin: 0;
  font-size: 16px;
  line-height: 1.82;
  color: rgba(243, 235, 221, 0.78);
}
.page-about .about-contact__list {
  list-style: none;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  display: grid;
}
.page-about .about-contact__list li {
  padding: 14px 0;
  border-top: 1px solid rgba(243, 235, 221, 0.16);
}
.page-about .about-contact__list span {
  display: block;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--gold-soft);
  margin-bottom: 5px;
}
.page-about .about-contact__list p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--paper);
  word-break: break-word;
}
.page-about .about-contact__note {
  margin: 16px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: rgba(243, 235, 221, 0.66);
}
.page-about .about-contact__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 32px);
}

/* ---------- 断点 ---------- */
@media (min-width: 700px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-fact {
    padding: 18px 18px 18px 20px;
  }
  .page-about .about-fact:first-child {
    padding-left: 0;
  }
  .page-about .about-fact + .about-fact {
    border-left: 1px solid var(--about-line);
  }
  .page-about .about-contact__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 28px;
  }
}

@media (min-width: 820px) {
  .page-about .chapter-split--media {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.9fr);
  }
  .page-about .chapter-split--tall {
    grid-template-columns: minmax(0, 0.72fr) minmax(0, 1.28fr);
  }
  .page-about .about-partner-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }
}

@media (min-width: 860px) {
  .page-about .about-revisit {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-revisit li {
    padding: 22px 0;
  }
  .page-about .about-revisit li:nth-child(odd) {
    padding-right: 28px;
    border-right: 1px solid var(--about-line);
  }
  .page-about .about-revisit li:nth-child(even) {
    padding-left: 28px;
  }
  .page-about .about-revisit li:nth-last-child(-n + 2) {
    border-bottom: 0;
  }
}

@media (min-width: 900px) {
  .page-about .team-row__role {
    max-height: 0;
    margin-top: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height 0.22s ease, opacity 0.22s ease, margin-top 0.22s ease;
  }
  .page-about .team-row:hover .team-row__role,
  .page-about .team-row:focus-within .team-row__role {
    max-height: 6em;
    margin-top: 10px;
    opacity: 1;
  }
}

@media (min-width: 1000px) {
  .page-about .about-body {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(32px, 4vw, 72px);
  }
  .page-about .about-index {
    position: sticky;
    top: 112px;
    align-self: start;
  }
  .page-about .about-index__list {
    display: block;
    overflow: visible;
    padding-bottom: 0;
  }
  .page-about .about-index__list li {
    border-top: 1px solid var(--about-line);
  }
  .page-about .about-index__list li:last-child {
    border-bottom: 1px solid var(--about-line);
  }
  .page-about .about-index__list .spy-link {
    white-space: normal;
    padding: 11px 0 11px 14px;
    border: 0;
    border-left: 1px solid transparent;
    border-radius: 0;
    background: none;
    line-height: 1.5;
  }
  .page-about .about-index__list .spy-link:hover {
    color: var(--ink);
    border-left-color: var(--about-gold-line);
  }
  .page-about .about-index__list .spy-link.is-active {
    color: var(--ink);
    font-weight: 700;
    border-left: 1px solid var(--gold);
    background: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-row__role,
  .page-about .team-row__bar,
  .page-about .about-index__list .spy-link {
    transition: none;
  }
}
<<<END>>>