.page-about {
  background: var(--uf-paper);
  color: var(--uf-rock);
}

.page-about .about-top {
  padding-top: clamp(20px, 4vw, 40px);
  padding-bottom: clamp(28px, 5vw, 52px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  display: grid;
  gap: 26px;
  margin-top: clamp(16px, 3vw, 28px);
  padding: clamp(22px, 4vw, 48px);
  background: var(--uf-ink);
  color: var(--uf-paper);
  box-shadow: inset 0 0 0 3px var(--uf-gold);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 34px), calc(100% - 34px) 100%, 0 100%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(115deg, rgba(242, 208, 138, .09) 0 2px, transparent 2px 10px);
  pointer-events: none;
}

.page-about .about-hero__copy {
  position: relative;
  z-index: 1;
}

.page-about .about-hero__eyebrow {
  display: inline-block;
  margin: 0 0 18px;
  padding: 5px 11px;
  font-family: var(--uf-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--uf-ink);
  background: var(--uf-cyan);
  border: 2px solid var(--uf-rock);
  box-shadow: var(--uf-shadow-sm);
}

.page-about .about-hero__title {
  margin: 0 0 18px;
  font-size: clamp(36px, 8.4vw, 74px);
  line-height: 1.03;
  font-weight: 900;
  letter-spacing: -.02em;
  color: var(--uf-paper);
  text-shadow: 4px 4px 0 rgba(0, 0, 0, .38);
}

.page-about .about-hero__lead {
  margin: 0;
  max-width: 34em;
  font-size: clamp(15px, 3.6vw, 18px);
  line-height: 1.85;
  color: var(--uf-gold-lt);
}

.page-about .about-hero__meta {
  margin: 18px 0 0;
  font-family: var(--uf-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--uf-cyan);
}

.page-about .about-hero__media {
  position: relative;
  z-index: 1;
  margin: 0;
  background: var(--uf-score);
  border: 3px solid var(--uf-rock);
  box-shadow: var(--uf-shadow);
}

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

.page-about .about-hero__media figcaption {
  padding: 10px 12px;
  font-size: 12px;
  line-height: 1.65;
  letter-spacing: .04em;
  color: var(--uf-clay);
  background: var(--uf-score);
  border-top: 3px solid var(--uf-rock);
}

/* ---------- 数据条 ---------- */
.page-about .about-stats {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  margin: clamp(26px, 5vw, 44px) 0 0;
  padding: 0;
  background: var(--uf-score);
  border: 3px solid var(--uf-rock);
  box-shadow: var(--uf-shadow-sm);
}

.page-about .about-stats__item {
  padding: 16px 20px;
  border-bottom: 3px solid var(--uf-rock);
}

.page-about .about-stats__item:last-child {
  border-bottom: none;
}

.page-about .about-stats dt {
  font-family: var(--uf-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--uf-clay);
  margin-bottom: 6px;
}

.page-about .about-stats dd {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  color: var(--uf-ink);
  overflow-wrap: anywhere;
}

.page-about .about-stats__num {
  font-family: var(--uf-mono);
  font-size: clamp(26px, 6vw, 38px);
  font-weight: 800;
  line-height: 1;
  color: var(--uf-coral);
  margin-right: 6px;
}

/* ---------- 主体骨架 ---------- */
.page-about .about-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
  padding-top: clamp(30px, 6vw, 64px);
  padding-bottom: clamp(40px, 7vw, 84px);
}

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

/* ---------- 章节小索引 ---------- */
.page-about .about-rail__label {
  margin: 0 0 10px;
  font-family: var(--uf-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--uf-clay);
}

.page-about .about-rail__list {
  display: flex;
  gap: 10px;
  margin: 0;
  padding: 0 0 10px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-rail__list > li {
  flex: 0 0 auto;
}

.page-about .about-rail__link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  white-space: nowrap;
  font-size: 13px;
  font-weight: 700;
  color: var(--uf-ink);
  background: var(--uf-paper);
  border: 3px solid var(--uf-rock);
  box-shadow: var(--uf-shadow-sm);
  text-decoration: none;
  transition: transform .18s ease, background-color .18s ease, color .18s ease;
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  background: var(--uf-gold-lt);
  transform: translate(-2px, -2px);
}

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

.page-about .about-rail__link[data-current] {
  background: var(--uf-ink);
  color: var(--uf-gold);
}

.page-about .about-rail__link[data-current] .about-rail__num {
  color: var(--uf-gold-lt);
}

/* ---------- 章节通用 ---------- */
.page-about .about-sec {
  padding-bottom: clamp(34px, 6vw, 64px);
}

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

.page-about .about-sec__head {
  margin-bottom: clamp(18px, 3vw, 30px);
}

.page-about .about-sec__head .uf-h2 {
  margin: 8px 0 12px;
}

.page-about .about-sec__head .uf-prose {
  margin: 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.8;
}

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

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 26px;
  top: 14px;
  bottom: 14px;
  width: 3px;
  background: linear-gradient(180deg, var(--uf-gold), var(--uf-moss));
}

.page-about .about-tl {
  position: relative;
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 12px;
  margin-bottom: 18px;
}

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

.page-about .about-tl__num {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 56px;
  height: 56px;
  font-family: var(--uf-mono);
  font-size: 18px;
  font-weight: 800;
  line-height: 1;
  color: var(--uf-gold);
  background: var(--uf-ink);
  border: 3px solid var(--uf-rock);
}

.page-about .about-tl__card {
  min-width: 0;
  padding: 18px 20px;
}

.page-about .about-tl__card .uf-tag {
  margin: 0 0 10px;
}

.page-about .about-tl__card .uf-h3 {
  margin: 0 0 8px;
  font-size: clamp(17px, 4vw, 20px);
}

.page-about .about-tl__card p:last-child {
  margin: 0;
  font-size: 16px;
  line-height: 1.75;
}

/* ---------- 图片块 ---------- */
.page-about .about-photo {
  margin: clamp(20px, 4vw, 34px) 0 0;
  background: var(--uf-score);
  border: 3px solid var(--uf-rock);
  box-shadow: var(--uf-shadow);
}

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

.page-about .about-photo figcaption {
  padding: 10px 14px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--uf-clay);
  border-top: 3px solid var(--uf-rock);
}

/* ---------- 四道手 ---------- */
.page-about .about-hand {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-hand__box {
  background: var(--uf-paper);
  border: 3px solid var(--uf-rock);
  box-shadow: var(--uf-shadow-sm);
}

.page-about .about-hand__sum {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 18px;
  font-size: 16px;
  font-weight: 700;
  color: var(--uf-ink);
  cursor: pointer;
  list-style: none;
}

.page-about .about-hand__sum::-webkit-details-marker {
  display: none;
}

.page-about .about-hand__sum::after {
  content: "＋";
  margin-left: auto;
  font-family: var(--uf-mono);
  font-size: 18px;
  color: var(--uf-coral);
}

.page-about .about-hand__box[open] .about-hand__sum::after {
  content: "－";
}

.page-about .about-hand__idx {
  font-family: var(--uf-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--uf-paper);
  background: var(--uf-clay);
  border: 2px solid var(--uf-rock);
  padding: 3px 8px;
}

.page-about .about-hand__box[open] .about-hand__idx {
  background: var(--uf-coral);
}

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

.page-about .about-hand__txt {
  margin: 0;
  padding: 0 18px 18px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--uf-rock);
}

/* ---------- 团队分工 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

.page-about .about-crew {
  padding: 22px 24px;
}

.page-about .about-crew__num {
  display: inline-block;
  margin-bottom: 14px;
  padding: 8px 18px;
  font-family: var(--uf-mono);
  font-size: clamp(30px, 7vw, 46px);
  font-weight: 800;
  line-height: 1;
  color: var(--uf-gold);
  background: var(--uf-ink);
  border: 3px solid var(--uf-rock);
  box-shadow: var(--uf-shadow-sm);
}

.page-about .about-crew .uf-h3 {
  margin: 0 0 10px;
}

.page-about .about-crew p {
  margin: 0 0 12px;
  font-size: 16px;
  line-height: 1.75;
}

.page-about .about-crew__list {
  margin: 0;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--uf-rock);
}

.page-about .about-crew__list li {
  margin-bottom: 6px;
}

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

/* ---------- 更新节奏 ---------- */
.page-about .about-cadence {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.page-about .about-cadence__slot {
  padding: 20px 22px;
  background: var(--uf-score);
  border: 3px solid var(--uf-rock);
  box-shadow: var(--uf-shadow-sm);
}

.page-about .about-cadence__slot--dark {
  background: var(--uf-ink);
  color: var(--uf-paper);
}

.page-about .about-cadence__slot--moss {
  background: var(--uf-moss);
  color: var(--uf-paper);
}

.page-about .about-cadence__day {
  margin: 0 0 8px;
  font-family: var(--uf-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--uf-clay);
}

.page-about .about-cadence__slot--dark .about-cadence__day {
  color: var(--uf-gold);
}

.page-about .about-cadence__slot--moss .about-cadence__day {
  color: var(--uf-gold-lt);
}

.page-about .about-cadence__slot .uf-h3 {
  margin: 0 0 10px;
}

.page-about .about-cadence__slot p:last-child {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
}

.page-about .about-cadence__slot--dark p:last-child {
  color: var(--uf-gold-lt);
}

.page-about .about-cadence__slot--moss p:last-child {
  color: var(--uf-paper);
}

.page-about .about-cadence__slot a {
  color: var(--uf-coral);
  font-weight: 700;
}

.page-about .about-cadence__slot--moss a {
  color: var(--uf-cyan);
}

/* ---------- 联系反馈 ---------- */
.page-about .about-reach {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

.page-about .about-reach__box {
  padding: 22px 24px;
  background: var(--uf-paper);
  border: 3px solid var(--uf-rock);
  box-shadow: var(--uf-shadow);
}

.page-about .about-reach__list {
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
}

.page-about .about-reach__list li {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  padding: 10px 0;
  border-bottom: 1px dashed rgba(43, 47, 44, .35);
}

.page-about .about-reach__list li:last-child {
  border-bottom: none;
}

.page-about .about-reach__key {
  flex: 0 0 84px;
  padding-top: 3px;
  font-family: var(--uf-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--uf-clay);
}

.page-about .about-reach__val {
  font-size: 16px;
  font-weight: 600;
  color: var(--uf-ink);
  overflow-wrap: anywhere;
}

.page-about .about-reach__btn {
  display: inline-block;
}

.page-about .about-reach__side {
  padding: 22px 24px;
  background: var(--uf-moss);
  color: var(--uf-paper);
  border: 3px solid var(--uf-rock);
  box-shadow: var(--uf-shadow);
}

.page-about .about-reach__side p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.8;
}

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

.page-about .about-reach__side a {
  color: var(--uf-cyan);
  font-weight: 700;
}

/* ---------- 窄屏到中屏 ---------- */
@media (min-width: 560px) {
  .page-about .about-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-stats__item {
    border-bottom: none;
    border-right: 3px solid var(--uf-rock);
  }

  .page-about .about-stats__item:last-child {
    border-right: none;
  }
}

@media (min-width: 640px) {
  .page-about .about-timeline::before {
    left: 34px;
  }

  .page-about .about-tl {
    grid-template-columns: 72px minmax(0, 1fr);
    gap: 18px;
    margin-bottom: 22px;
  }

  .page-about .about-tl__num {
    width: 72px;
    height: 72px;
    font-size: 24px;
  }

  .page-about .about-tl:nth-child(2) .about-tl__card {
    margin-left: 12px;
  }

  .page-about .about-tl:nth-child(3) .about-tl__card {
    margin-left: 24px;
  }

  .page-about .about-tl:nth-child(4) .about-tl__card {
    margin-left: 36px;
  }

  .page-about .about-tl:nth-child(5) .about-tl__card {
    margin-left: 48px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 860px) {
  .page-about .about-cadence {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 18px 20px;
  }

  .page-about .about-cadence__slot:nth-child(1) {
    grid-column: 1 / span 7;
  }

  .page-about .about-cadence__slot:nth-child(2) {
    grid-column: 8 / span 5;
    margin-top: 32px;
  }

  .page-about .about-cadence__slot:nth-child(3) {
    grid-column: 3 / span 6;
    margin-top: 4px;
  }
}

@media (min-width: 820px) {
  .page-about .about-team {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 22px;
  }

  .page-about .about-crew--alt {
    margin-top: 38px;
  }

  .page-about .about-reach {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
  }
}

@media (min-width: 920px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: center;
    gap: clamp(28px, 4vw, 60px);
    padding: clamp(34px, 4vw, 56px);
  }

  .page-about .about-shell {
    grid-template-columns: minmax(180px, 210px) minmax(0, 1fr);
    align-items: start;
    gap: clamp(32px, 5vw, 72px);
  }

  .page-about .about-rail {
    position: sticky;
    top: 104px;
  }

  .page-about .about-rail__list {
    flex-direction: column;
    gap: 8px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-rail__list > li:nth-child(2) {
    margin-left: 6px;
  }

  .page-about .about-rail__list > li:nth-child(3) {
    margin-left: 12px;
  }

  .page-about .about-rail__list > li:nth-child(4) {
    margin-left: 18px;
  }

  .page-about .about-rail__list > li:nth-child(5) {
    margin-left: 24px;
  }
}
<<<END>>>