.page-about {
  --about-rail: clamp(92px, 9vw, 148px);
  --about-gap: clamp(22px, 3vw, 48px);
  --about-pad: clamp(52px, 7vw, 108px);
  --about-body: rgba(244, 251, 246, 0.84);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(26px, 4vw, 48px) 0 clamp(46px, 7vw, 96px);
  border-bottom: 1px solid var(--hair);
  position: relative;
}
.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -1px;
  width: clamp(60px, 14vw, 200px);
  height: 2px;
  background: var(--lime);
}
.page-about .about-hero__grid {
  display: grid;
  gap: var(--about-gap);
  margin-top: clamp(24px, 4vw, 48px);
}
.page-about .about-hero h1 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(38px, 8.6vw, 100px);
  line-height: 0.96;
  letter-spacing: -0.02em;
  margin: 16px 0 0;
  color: var(--paper);
}
.page-about .about-hero h1 em {
  display: block;
  font-style: normal;
  color: var(--lime);
}
.page-about .about-hero__lede {
  max-width: 46ch;
  margin: 24px 0 0;
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.82;
  color: var(--about-body);
}
.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.page-about .about-hero__panel {
  background: linear-gradient(145deg, rgba(18, 80, 60, 0.92), rgba(8, 40, 31, 0.96));
  border: 1px solid var(--hair);
  border-left: 3px solid var(--lime);
  padding: clamp(20px, 3vw, 32px);
}
.page-about .about-figure {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--hair-strong);
}
.page-about .about-figure__num {
  font-size: clamp(40px, 6vw, 64px);
  font-weight: 700;
  line-height: 1;
  color: var(--lime);
}
.page-about .about-figure__cap {
  font-size: 13px;
  line-height: 1.5;
  color: var(--mist);
}
.page-about .about-metrics {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
}
.page-about .about-metrics li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 13px 0;
  border-bottom: 1px solid var(--hair);
}
.page-about .about-metrics li:last-child {
  border-bottom: 0;
}
.page-about .about-metric__num {
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: 700;
  color: var(--copper-bright);
}
.page-about .about-metric__lab {
  font-size: 13.5px;
  color: var(--mist);
  text-align: right;
}

/* ---------- 立场 ---------- */
.page-about .about-stance {
  padding: var(--about-pad) 0;
  border-bottom: 1px solid var(--hair);
}
.page-about .about-stance__grid {
  display: grid;
  gap: var(--about-gap);
}
.page-about .about-stance h2 {
  margin: 14px 0 24px;
}
.page-about .about-stance__body p {
  max-width: 62ch;
  margin: 0 0 18px;
  font-size: var(--fs-body);
  line-height: 1.85;
  color: var(--about-body);
}
.page-about .about-stance__body p:last-child {
  margin-bottom: 0;
}
.page-about .about-stance__aside {
  border-top: 2px solid var(--copper);
  padding-top: 20px;
}
.page-about .about-stance__asidelabel {
  margin: 0 0 14px;
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--mist);
}
.page-about .about-fields {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: field;
}
.page-about .about-fields li {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 11px 0;
  border-bottom: 1px solid var(--hair);
  font-size: 16px;
  color: var(--paper);
}
.page-about .about-fields li .num {
  font-size: 12px;
  color: var(--copper);
}
.page-about .about-stance__note {
  margin: 18px 0 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mist);
}
.page-about .about-stance__link {
  display: inline-block;
  margin-top: 14px;
  font-size: 14px;
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(198, 255, 0, 0.4);
  padding-bottom: 2px;
}
.page-about .about-stance__link:hover {
  color: var(--paper);
  border-bottom-color: var(--paper);
}

/* ---------- 编年 ---------- */
.page-about .about-chron {
  padding: var(--about-pad) 0;
  border-bottom: 1px solid var(--hair);
  background: var(--turf-deep);
}
.page-about .about-chron__inner {
  display: grid;
  gap: var(--about-gap);
}
.page-about .about-chron__railtitle {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--mist);
}
.page-about .about-rail {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 4px;
  overflow-x: auto;
  scrollbar-width: none;
}
.page-about .about-rail::-webkit-scrollbar {
  display: none;
}
.page-about .about-rail__link {
  display: block;
  font-family: var(--font-num);
  font-size: 15px;
  padding: 8px 12px;
  color: var(--mist);
  text-decoration: none;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}
.page-about .about-rail__link:hover {
  color: var(--paper);
}
.page-about .about-rail__link[data-current] {
  color: var(--lime);
  border-bottom-color: var(--lime);
}
.page-about .about-chron__body h2 {
  margin: 14px 0 32px;
}
.page-about .about-chapter {
  padding-bottom: clamp(22px, 3vw, 34px);
}
.page-about .about-chapter + .about-chapter {
  margin-top: clamp(24px, 3.4vw, 40px);
  padding-top: clamp(24px, 3.4vw, 40px);
  border-top: 1px solid var(--hair);
}
.page-about .about-chapter__year {
  display: block;
  margin: 0 0 8px;
  font-family: var(--font-num);
  font-size: clamp(26px, 3.6vw, 42px);
  font-weight: 700;
  line-height: 1;
  color: var(--copper);
  transition: color 0.3s var(--ease);
}
.page-about .about-chapter[data-active] .about-chapter__year {
  color: var(--lime);
}
.page-about .about-chapter h3 {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: clamp(20px, 2.2vw, 27px);
  letter-spacing: -0.01em;
  line-height: 1.3;
  color: var(--paper);
}
.page-about .about-chapter p {
  margin: 0;
  font-size: var(--fs-body);
  line-height: 1.82;
  color: var(--about-body);
}

/* ---------- 图片 ---------- */
.page-about .about-media {
  margin: clamp(30px, 4vw, 52px) 0 0;
  border: 1px solid var(--hair);
  background: var(--turf-line);
}
.page-about .about-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .about-media--chron {
  margin-top: clamp(34px, 5vw, 60px);
}
.page-about .about-media .media-frame__caption {
  display: block;
  padding: 12px 16px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
  border-top: 1px solid var(--hair);
}
.page-about .about-media--ridge {
  margin-top: clamp(28px, 4vw, 44px);
  border-color: rgba(198, 255, 0, 0.22);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding: var(--about-pad) 0;
  border-bottom: 1px solid var(--hair);
}
.page-about .about-team h2 {
  margin: 14px 0 20px;
}
.page-about .about-team__lede {
  max-width: 62ch;
  margin: 0 0 clamp(26px, 3.6vw, 44px);
  font-size: var(--fs-body);
  line-height: 1.82;
  color: var(--about-body);
}
.page-about .about-team__grid {
  display: grid;
  gap: 1px;
  background: var(--hair);
  border: 1px solid var(--hair);
}
.page-about .about-team__card {
  background: var(--turf);
  padding: clamp(20px, 2.8vw, 30px);
}
.page-about .about-team__card[open] {
  background: var(--turf-line);
}
.page-about .about-team__card > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  list-style: none;
  cursor: pointer;
}
.page-about .about-team__card > summary::-webkit-details-marker {
  display: none;
}
.page-about .about-team__name {
  font-family: var(--font-head);
  font-size: clamp(19px, 2.1vw, 24px);
  letter-spacing: -0.01em;
  color: var(--paper);
}
.page-about .about-team__toggle {
  flex: none;
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  font-family: var(--font-num);
  font-size: 16px;
  color: var(--lime);
  border: 1px solid rgba(198, 255, 0, 0.4);
  border-radius: var(--pill);
  transition: transform 0.25s var(--ease);
}
.page-about .about-team__card[open] .about-team__toggle {
  transform: rotate(45deg);
}
.page-about .about-team__desc {
  margin: 14px 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--mist);
}
.page-about .about-team__list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
}
.page-about .about-team__list li {
  position: relative;
  padding: 9px 0 9px 18px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--about-body);
  border-top: 1px solid var(--hair);
}
.page-about .about-team__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 17px;
  width: 7px;
  height: 1px;
  background: var(--lime);
}

/* ---------- 合作 ---------- */
.page-about .about-partners {
  padding: var(--about-pad) 0;
  border-bottom: 1px solid var(--hair);
  background: var(--turf-deep);
}
.page-about .about-partners h2 {
  margin: 14px 0 20px;
}
.page-about .about-partners__lede {
  max-width: 62ch;
  margin: 0 0 clamp(26px, 3.6vw, 44px);
  font-size: var(--fs-body);
  line-height: 1.82;
  color: var(--about-body);
}
.page-about .about-partners__grid {
  display: grid;
  gap: 1px;
  background: var(--hair);
  border: 1px solid var(--hair);
}
.page-about .about-partner {
  background: var(--turf);
  padding: clamp(22px, 3vw, 34px);
  transition: background 0.25s var(--ease);
}
.page-about .about-partner:hover {
  background: var(--turf-line);
}
.page-about .about-partner__num {
  margin: 0;
  font-family: var(--font-num);
  font-size: clamp(34px, 4.6vw, 54px);
  font-weight: 700;
  line-height: 1;
  color: var(--copper-bright);
}
.page-about .about-partner__name {
  margin: 12px 0 0;
  font-size: 16px;
  font-weight: 600;
  color: var(--paper);
}
.page-about .about-partner__desc {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--mist);
}

/* ---------- 内容产品 ---------- */
.page-about .about-shelf {
  padding: var(--about-pad) 0;
  border-bottom: 1px solid var(--hair);
}
.page-about .about-shelf h2 {
  margin: 14px 0 20px;
}
.page-about .about-shelf__lede {
  max-width: 60ch;
  margin: 0 0 clamp(26px, 3.6vw, 44px);
  font-size: var(--fs-body);
  line-height: 1.82;
  color: var(--about-body);
}
.page-about .about-shelf__grid {
  display: grid;
  gap: var(--about-gap);
}
.page-about .about-shelf__item {
  border-left: 2px solid var(--copper);
  padding: 4px 0 4px 20px;
}
.page-about .about-shelf__item:nth-child(2) {
  border-left-color: var(--lime);
}
.page-about .about-shelf__item:nth-child(3) {
  border-left-color: var(--mist);
}
.page-about .about-shelf__tag {
  margin: 0 0 14px;
}
.page-about .about-shelf__item h3 {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: clamp(19px, 2.1vw, 24px);
  letter-spacing: -0.01em;
  line-height: 1.32;
  color: var(--paper);
}
.page-about .about-shelf__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-body);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  padding: clamp(44px, 6vw, 88px) 0;
}
.page-about .about-cta__inner {
  display: grid;
  gap: var(--about-gap);
  align-items: center;
  border: 1px solid var(--hair-strong);
  border-left: 3px solid var(--lime);
  background: linear-gradient(120deg, rgba(18, 80, 60, 0.86), rgba(8, 40, 31, 0.94));
  padding: clamp(24px, 3.4vw, 44px);
}
.page-about .about-cta__title {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-size: clamp(24px, 3vw, 38px);
  letter-spacing: -0.015em;
  line-height: 1.2;
  color: var(--paper);
}
.page-about .about-cta__desc {
  margin: 0;
  max-width: 52ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--mist);
}
.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 680px) {
  .page-about .about-partners__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-shelf__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-about .about-team__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: 58fr 42fr;
    align-items: end;
    gap: clamp(32px, 5vw, 72px);
  }
  .page-about .about-stance__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 76px);
  }
  .page-about .about-stance__aside {
    padding-top: 26px;
  }
  .page-about .about-chron__inner {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(30px, 4.5vw, 76px);
  }
  .page-about .about-chron__rail {
    position: sticky;
    top: calc(var(--header-h) + 34px);
    align-self: start;
  }
  .page-about .about-rail {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
  }
  .page-about .about-rail__link {
    padding: 7px 0 7px 14px;
    border-bottom: 0;
    border-left: 2px solid transparent;
  }
  .page-about .about-rail__link[data-current] {
    border-left-color: var(--lime);
  }
  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1.6fr) auto;
    gap: clamp(28px, 4vw, 56px);
  }
}

@media (min-width: 1200px) {
  .page-about .about-hero__grid {
    grid-template-columns: 56fr 44fr;
  }
  .page-about .about-hero__panel {
    padding: 36px 32px;
  }
}
<<<END>>>