.page-about {
  --about-lead: clamp(17px, 2vw, 21px);
  --about-title: clamp(28px, 4.2vw, 54px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  background: var(--ink);
  color: var(--paper);
  padding-top: clamp(28px, 4.6vw, 60px);
  padding-bottom: clamp(46px, 7vw, 96px);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(244, 239, 230, .055) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(244, 239, 230, .055) 1px, transparent 1px);
  background-size: 72px 72px;
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: clamp(16px, 3vw, 34px);
  right: clamp(16px, 3vw, 34px);
  width: clamp(38px, 5vw, 60px);
  height: clamp(38px, 5vw, 60px);
  border-top: 1px solid var(--copper);
  border-right: 1px solid var(--copper);
  pointer-events: none;
}

.page-about .about-hero > .shell {
  position: relative;
  z-index: 1;
}

.page-about .about-hero .breadcrumb,
.page-about .about-hero .breadcrumb__link {
  color: var(--slate-2);
}

.page-about .about-hero .breadcrumb__link:hover {
  color: var(--copper-2);
}

.page-about .about-hero .breadcrumb__item [aria-current] {
  color: var(--paper);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 30px);
  margin-top: clamp(26px, 4vw, 52px);
}

.page-about .about-hero__rail {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--copper-2);
}

.page-about .about-hero__num {
  font-size: 13px;
  color: var(--copper);
}

.page-about .about-hero__title {
  margin: 0;
  font-size: clamp(38px, 8vw, 92px);
  font-weight: 300;
  line-height: 1.02;
  letter-spacing: -.02em;
  color: var(--paper);
  overflow-wrap: break-word;
}

.page-about .about-hero__lede {
  margin: clamp(18px, 3vw, 30px) 0 0;
  max-width: 60ch;
  font-size: var(--about-lead);
  line-height: 1.78;
  color: rgba(244, 239, 230, .84);
}

.page-about .about-hero__sub {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--slate-2);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(24px, 3.4vw, 40px);
}

.page-about .about-hero__stats {
  margin-top: clamp(38px, 6vw, 72px);
  padding-top: clamp(20px, 3vw, 30px);
  border-top: 1px solid var(--line-inv);
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 30px);
}

.page-about .about-hero__stats .data-cell__label {
  color: var(--slate-2);
}

.page-about .about-hero__stats .data-cell__value {
  color: var(--paper);
}

/* ---------- 通用区块 ---------- */
.page-about .about-block {
  padding: clamp(52px, 8.5vw, 112px) 0;
}

.page-about .about-block--paper {
  background: var(--paper);
  color: var(--ink);
}

.page-about .about-block--paper2 {
  background: var(--paper-2);
  color: var(--ink);
}

.page-about .about-block--ink {
  background: var(--ink-2);
  color: var(--paper);
}

.page-about .about-block__head {
  max-width: 78ch;
  margin-bottom: clamp(30px, 4.6vw, 58px);
}

.page-about .about-block__title {
  margin: 0 0 clamp(14px, 2vw, 22px);
  font-size: var(--about-title);
  font-weight: 300;
  line-height: 1.2;
  letter-spacing: -.01em;
}

.page-about .about-block__lede {
  margin: 0;
  max-width: 70ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.9;
  color: var(--slate);
}

.page-about .about-block--ink .eyebrow {
  color: var(--copper-2);
}

.page-about .about-block--ink .about-block__lede {
  color: var(--slate-2);
}

/* ---------- 图片框 ---------- */
.page-about .media-frame {
  aspect-ratio: auto;
  overflow: hidden;
  margin: 0;
}

.page-about .media-frame img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-figure {
  margin: 0 0 clamp(34px, 5vw, 58px);
  border: 1px solid var(--line);
}

.page-about .about-figure .media-frame__cap {
  position: static;
  display: block;
  margin: 0;
  padding: 12px clamp(14px, 2vw, 20px);
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate);
  background: var(--paper-3);
  border-top: 1px solid var(--line);
}

/* ---------- 记录条目 ---------- */
.page-about .about-records {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-records__item {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: clamp(14px, 2.4vw, 30px);
  padding: clamp(22px, 3vw, 34px) 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-records__index {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--signal);
}

.page-about .about-records__title {
  margin: 0 0 8px;
  font-size: clamp(17px, 1.9vw, 22px);
  font-weight: 500;
  line-height: 1.45;
}

.page-about .about-records__text {
  margin: 0;
  max-width: 72ch;
  font-size: 15px;
  line-height: 1.9;
  color: var(--slate);
}

/* ---------- 谁在用：图 + 台账 ---------- */
.page-about .about-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 52px);
  align-items: start;
}

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

.page-about .about-ledger {
  margin: 0;
  border-top: 1px solid var(--line-inv);
}

.page-about .about-ledger__row {
  padding: clamp(20px, 2.6vw, 30px) 0;
  border-bottom: 1px solid var(--line-inv);
}

.page-about .about-ledger__key {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  margin: 0 0 10px;
}

.page-about .about-ledger__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--copper);
}

.page-about .about-ledger__name {
  font-size: clamp(17px, 1.8vw, 20px);
  font-weight: 500;
  color: var(--paper);
}

.page-about .about-ledger__tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  padding: 3px 8px;
  color: var(--ink);
  background: var(--signal);
}

.page-about .about-ledger__val {
  margin: 0;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.9;
  color: rgba(244, 239, 230, .78);
}

/* ---------- 更新节奏 ---------- */
.page-about .about-pace {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 56px);
  align-items: start;
}

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

.page-about .about-pace__stats {
  margin-top: clamp(24px, 3vw, 36px);
  padding-top: clamp(20px, 2.6vw, 28px);
  border-top: 1px solid var(--line);
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 2.4vw, 28px);
}

/* ---------- 三条路径 ---------- */
.page-about .about-paths {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  border-top: 1px solid var(--line);
}

.page-about .about-paths__item {
  padding: clamp(24px, 3.4vw, 38px) 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-paths__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--copper);
  margin-bottom: 14px;
}

.page-about .about-paths__title {
  margin: 0 0 10px;
  font-size: clamp(17px, 1.9vw, 21px);
  font-weight: 500;
  line-height: 1.45;
}

.page-about .about-paths__text {
  margin: 0 0 18px;
  font-size: 15px;
  line-height: 1.9;
  color: var(--slate);
}

.page-about .about-paths__link {
  display: inline-block;
  font-size: 14px;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--signal);
  padding-bottom: 2px;
  transition: color .25s var(--ease), border-color .25s var(--ease);
}

.page-about .about-paths__link:hover,
.page-about .about-paths__link:focus-visible {
  color: var(--signal);
  border-color: var(--ink);
}

/* ---------- 联系与备案 ---------- */
.page-about .about-contact__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 56px);
  align-items: start;
}

.page-about .about-contact__lead .btn {
  margin-top: clamp(20px, 3vw, 32px);
}

.page-about .about-contact__list {
  margin: 0;
  border-top: 1px solid var(--line-inv);
}

.page-about .about-contact__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: clamp(16px, 2.2vw, 22px) 0;
  border-bottom: 1px solid var(--line-inv);
}

.page-about .about-contact__key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--slate-2);
}

.page-about .about-contact__val {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper);
  overflow-wrap: break-word;
}

.page-about .about-contact__note {
  margin: clamp(24px, 3.4vw, 36px) 0 0;
  padding-top: clamp(18px, 2.4vw, 24px);
  border-top: 1px solid var(--line-inv);
  font-size: 13px;
  line-height: 1.8;
  color: var(--slate-2);
  max-width: 74ch;
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-about .about-pace__stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 720px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-hero__stats .data-cell + .data-cell {
    border-left: 1px solid var(--line-inv);
    padding-left: clamp(18px, 3vw, 30px);
  }

  .page-about .about-contact__row {
    grid-template-columns: minmax(0, 150px) minmax(0, 1fr);
    gap: clamp(14px, 2.4vw, 30px);
    align-items: baseline;
  }
}

@media (min-width: 820px) {
  .page-about .about-paths {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-paths__item {
    border-bottom: none;
    padding-right: clamp(18px, 2.4vw, 34px);
  }

  .page-about .about-paths__item + .about-paths__item {
    border-left: 1px solid var(--line);
    padding-left: clamp(18px, 2.4vw, 34px);
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: 88px minmax(0, 1fr);
    gap: clamp(24px, 3.4vw, 52px);
  }

  .page-about .about-hero__rail {
    flex-direction: column;
    align-items: flex-start;
    align-self: stretch;
    border-left: 1px solid var(--line-inv);
    padding-left: 16px;
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr);
    gap: clamp(30px, 4.6vw, 64px);
  }

  .page-about .about-pace {
    grid-template-columns: minmax(0, .78fr) minmax(0, 1.22fr);
    gap: clamp(30px, 4.6vw, 64px);
  }

  .page-about .about-contact__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    gap: clamp(30px, 4.6vw, 64px);
  }
}

@media (min-width: 1100px) {
  .page-about .about-records__item {
    grid-template-columns: 88px minmax(0, 1fr);
  }
}
<<<END>>>