.page-about {
  --about-body: #C6CEE0;
  --about-index-w: 208px;
  background: var(--ink-indigo);
  color: var(--paper);
  font-family: var(--font-body);
}

.page-about .about-crumbs {
  padding-top: clamp(18px, 3vw, 30px);
}

/* ── 首屏 ───────────────────────────────── */
.page-about .about-hero {
  padding-block: clamp(26px, 4.2vw, 52px) clamp(22px, 3.2vw, 40px);
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 5.2vw, 49px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 14px 0 0;
  max-width: 24ch;
  color: var(--paper);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(22px, 3vw, 40px);
  margin-top: clamp(20px, 2.8vw, 32px);
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 64ch;
  font-size: 17px;
  line-height: 1.8;
  color: var(--about-body);
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-hero__facts li {
  background: var(--ink-indigo);
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-hero__num {
  font-family: var(--font-mono);
  font-size: 25px;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--amber-light);
}

.page-about .about-hero__num em {
  font-style: normal;
  font-size: 0.7em;
  vertical-align: super;
}

.page-about .about-hero__label {
  font-size: 13px;
  color: var(--muted);
  letter-spacing: 0.04em;
}

@media (min-width: 860px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: start;
  }
}

/* ── 双栏骨架 ───────────────────────────── */
.page-about .about-shell {
  min-width: 0;
}

.page-about .about-flow {
  min-width: 0;
}

@media (min-width: 980px) {
  .page-about .about-shell {
    display: grid;
    grid-template-columns: var(--about-index-w) minmax(0, 1fr);
    column-gap: clamp(28px, 3.6vw, 56px);
    align-items: start;
  }
}

/* ── 章节索引 ───────────────────────────── */
.page-about .about-index {
  padding-block: clamp(18px, 3vw, 26px) 0;
}

.page-about .about-index__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--muted);
  text-transform: uppercase;
}

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

.page-about .about-index__list::-webkit-scrollbar {
  display: none;
}

.page-about .about-index__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  white-space: nowrap;
  padding: 8px 14px;
  border: 1px solid var(--line);
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.18s var(--t), border-color 0.18s var(--t);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--amber-light);
  border-color: var(--amber);
}

.page-about .about-index__link:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 2px;
}

.page-about .about-index__no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--amber);
}

@media (min-width: 980px) {
  .page-about .about-index {
    position: sticky;
    top: 96px;
    align-self: start;
    padding-block: clamp(38px, 4vw, 54px) 0;
    padding-right: clamp(16px, 2vw, 26px);
    border-right: 1px solid var(--line);
  }

  .page-about .about-index__list {
    display: block;
    overflow: visible;
  }

  .page-about .about-index__list li + li {
    margin-top: 2px;
  }

  .page-about .about-index__link {
    border: 0;
    border-left: 1px solid var(--line);
    padding: 10px 0 10px 14px;
    font-size: 14.5px;
  }

  .page-about .about-index__link:hover,
  .page-about .about-index__link:focus-visible {
    border-left-color: var(--amber);
  }
}

/* ── 章节通用 ───────────────────────────── */
.page-about .about-sec {
  border-top: 1px solid var(--line);
  padding-block: clamp(32px, 4.6vw, 60px);
}

.page-about .about-flow > .about-sec:first-child {
  border-top: 0;
  padding-top: clamp(14px, 2vw, 26px);
}

.page-about .about-sec__head {
  margin-bottom: clamp(14px, 2vw, 20px);
}

.page-about .about-sec__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--amber);
  margin-bottom: 8px;
}

.page-about .about-sec__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 3.2vw, 31px);
  line-height: 1.32;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--paper);
}

.page-about .about-sec p {
  margin: 0 0 16px;
  max-width: 70ch;
  font-size: 17px;
  line-height: 1.78;
  color: var(--about-body);
}

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

/* ── 适用场景列表 ───────────────────────── */
.page-about .about-scenes {
  list-style: none;
  margin: clamp(20px, 2.8vw, 28px) 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-scenes li {
  display: grid;
  grid-template-columns: 116px minmax(0, 1fr);
  gap: 6px 16px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
  font-size: 15.5px;
  line-height: 1.7;
  color: var(--about-body);
}

.page-about .about-scenes b {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 13px;
  letter-spacing: 0.05em;
  color: var(--amber-light);
}

@media (max-width: 560px) {
  .page-about .about-scenes li {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* ── 时间线 ─────────────────────────────── */
.page-about .about-tl {
  list-style: none;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  display: grid;
  gap: 26px;
}

.page-about .about-tl__item {
  position: relative;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.page-about .about-tl__item::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 40px;
  height: 1px;
  background: var(--amber);
}

.page-about .about-tl__year {
  display: block;
  font-family: var(--font-mono);
  font-size: 25px;
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--amber-light);
}

.page-about .about-tl__ver,
.page-about .about-tl__sites {
  display: inline-block;
  margin-top: 8px;
  margin-right: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-about .about-tl__sites {
  color: var(--celadon);
}

.page-about .about-tl__note {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--about-body);
}

@media (min-width: 720px) {
  .page-about .about-tl {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px;
  }
}

.page-about .about-history__fig {
  margin: clamp(24px, 3.4vw, 38px) 0 0;
}

.page-about .about-history__fig .media__cap {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

/* ── 数据条 ─────────────────────────────── */
.page-about .about-band {
  margin-block: clamp(8px, 1.4vw, 16px);
  padding: clamp(22px, 3vw, 34px) clamp(18px, 2.6vw, 30px);
  background: linear-gradient(118deg, #16244A 0%, #0E1830 62%, #16244A 100%);
  border-top: 1px solid var(--amber);
  border-bottom: 1px solid var(--line);
}

.page-about .about-band__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(18px, 2.6vw, 28px) clamp(14px, 2vw, 24px);
}

.page-about .about-band__stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-left: 14px;
  border-left: 1px solid var(--line);
}

.page-about .about-band__num {
  font-family: var(--font-mono);
  font-size: clamp(25px, 3.4vw, 39px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--amber-light);
}

.page-about .about-band__num em {
  font-style: normal;
  font-size: 0.62em;
  vertical-align: super;
  color: var(--celadon);
}

.page-about .about-band__label {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

@media (min-width: 760px) {
  .page-about .about-band__grid {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

/* ── 团队图片 ───────────────────────────── */
.page-about .about-team__fig {
  margin: clamp(20px, 2.8vw, 30px) 0 0;
}

.page-about .about-team__fig .media__cap {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

/* ── 角色折叠 ───────────────────────────── */
.page-about .about-roles {
  margin-top: clamp(20px, 2.8vw, 30px);
  border-top: 1px solid var(--line);
}

.page-about .about-role {
  border-bottom: 1px solid var(--line);
}

.page-about .about-role__head {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
}

.page-about .about-role__trigger {
  width: 100%;
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  align-items: center;
  gap: 14px;
  padding: 16px 4px;
  background: none;
  border: 0;
  color: var(--paper);
  font-family: inherit;
  font-size: 17px;
  text-align: left;
  cursor: pointer;
  transition: color 0.18s var(--t);
}

.page-about .about-role__trigger:hover {
  color: var(--amber-light);
}

.page-about .about-role__trigger:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 2px;
}

.page-about .about-role__no {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--amber);
}

.page-about .about-role__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  letter-spacing: -0.01em;
}

.page-about .about-role__body {
  padding: 0 4px 20px 60px;
}

.page-about .about-role__body p {
  margin: 0 0 10px;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.76;
  color: var(--about-body);
}

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

@media (max-width: 560px) {
  .page-about .about-role__trigger {
    grid-template-columns: 34px minmax(0, 1fr);
  }

  .page-about .about-role__body {
    padding-left: 4px;
  }
}

/* ── 评审机制 ───────────────────────────── */
.page-about .about-review {
  display: grid;
  gap: clamp(24px, 3.2vw, 40px);
  margin-top: clamp(20px, 2.8vw, 30px);
}

@media (min-width: 840px) {
  .page-about .about-review {
    grid-template-columns: minmax(0, 1fr) minmax(0, 300px);
    align-items: start;
  }
}

.page-about .about-review__steps {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-review__step {
  position: relative;
  margin-left: 7px;
  padding: 0 0 24px 30px;
  border-left: 1px solid var(--line);
}

.page-about .about-review__step:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-about .about-review__step::before {
  content: "";
  position: absolute;
  left: -4.5px;
  top: 6px;
  width: 8px;
  height: 8px;
  border: 1px solid var(--amber);
  border-radius: 50%;
  background: var(--ink-indigo);
}

.page-about .about-review__step h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  color: var(--paper);
}

.page-about .about-review__step p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.76;
  color: var(--about-body);
}

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

.page-about .about-review__fig .media__cap {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

/* ── 区域运营 ───────────────────────────── */
.page-about .about-regions {
  display: grid;
  gap: 1px;
  margin-top: clamp(20px, 2.8vw, 28px);
  background: var(--line);
  border: 1px solid var(--line);
}

@media (min-width: 700px) {
  .page-about .about-regions {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-about .about-region {
  background: var(--ink-indigo);
  padding: clamp(18px, 2.4vw, 26px);
}

.page-about .about-region__zone {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--amber);
  margin-bottom: 10px;
}

.page-about .about-region__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.45;
  color: var(--paper);
}

.page-about .about-region p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--about-body);
  max-width: none;
}

.page-about .about-regions__foot {
  margin-top: clamp(18px, 2.4vw, 26px) !important;
}

/* ── 协作边界 ───────────────────────────── */
.page-about .about-split {
  list-style: none;
  margin: clamp(20px, 2.8vw, 28px) 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

@media (min-width: 760px) {
  .page-about .about-split {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1px;
    background: var(--line);
    border: 1px solid var(--line);
  }
}

.page-about .about-split__item {
  padding: clamp(18px, 2.4vw, 26px);
  border-left: 2px solid var(--line);
  background: var(--ink-indigo);
}

.page-about .about-split__item--own {
  border-left-color: var(--celadon);
}

.page-about .about-split__item--partner {
  border-left-color: var(--violet);
}

.page-about .about-split__tag {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
}

.page-about .about-split__item--own .about-split__tag {
  color: var(--celadon);
}

.page-about .about-split__item--partner .about-split__tag {
  color: var(--violet);
}

.page-about .about-split__item p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.76;
  color: var(--about-body);
  max-width: none;
}

/* ── 结尾行动区 ─────────────────────────── */
.page-about .about-cta {
  padding-block: clamp(36px, 5vw, 64px);
}

.page-about .about-cta__panel {
  padding: clamp(24px, 3.6vw, 44px);
  border: 1px solid var(--line);
  background: linear-gradient(126deg, #16244A 0%, #101B36 100%);
}

.page-about .about-cta__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 3vw, 31px);
  line-height: 1.32;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-cta__text {
  margin: 0;
  max-width: 64ch;
  font-size: 16.5px;
  line-height: 1.78;
  color: var(--about-body);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 2.8vw, 30px);
}

.page-about .about-cta__actions .btn {
  text-decoration: none;
}
<<<END>>>