.page-about {
  --about-track: 170px;
  --about-inner: 42em;
  --about-hair: rgba(227, 182, 102, .26);
  --about-soft: rgba(27, 51, 88, .8);
  display: block;
}

/* ---------- 顶部标题 ---------- */
.page-about .about-top {
  position: relative;
  padding-top: 22px;
}

.page-about .about-top::before {
  content: "";
  position: absolute;
  top: 0;
  left: -40px;
  width: 220px;
  height: 220px;
  background: radial-gradient(circle at 20% 20%, rgba(227, 182, 102, .16), transparent 68%);
  pointer-events: none;
}

.page-about .about-head {
  position: relative;
  padding: 18px 0 30px;
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-head .page-head__kicker {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--gold);
}

.page-about .about-head .page-head__title {
  margin: 0 0 18px;
  max-width: 18em;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(28px, 7vw, 50px);
  line-height: 1.16;
  letter-spacing: -.015em;
  color: var(--paper);
}

.page-about .about-head .page-head__lead {
  margin: 0;
  max-width: var(--about-inner);
  font-size: 15.5px;
  line-height: 1.92;
  color: var(--paper-dim);
}

/* ---------- 主骨架 ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  padding: 24px 0 64px;
}

/* ---------- 左侧章节轨 ---------- */
.page-about .about-rail {
  min-width: 0;
}

.page-about .about-rail__list {
  display: flex;
  gap: 6px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

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

.page-about .about-rail .rail__item {
  list-style: none;
  flex: none;
}

.page-about .about-rail__link {
  display: flex;
  align-items: baseline;
  gap: 7px;
  padding: 8px 13px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--paper-faint);
  text-decoration: none;
  border: 1px solid var(--about-soft);
  border-radius: 999px;
  white-space: nowrap;
  transition: color .2s var(--ease), border-color .2s var(--ease), background-color .2s var(--ease);
}

.page-about .about-rail__link:hover {
  color: var(--gold-lite);
  border-color: var(--about-hair);
}

.page-about .about-rail .rail__idx {
  color: var(--gold);
}

.page-about .about-rail .rail__item[aria-current="true"] .about-rail__link {
  color: var(--coral);
  border-color: rgba(255, 106, 69, .55);
  background: rgba(255, 106, 69, .08);
}

.page-about .about-rail .rail__item[aria-current="true"] .rail__idx {
  color: var(--coral);
}

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

.page-about .about-chapter {
  position: relative;
  padding: 30px 0 44px;
  border-top: 1px solid var(--about-soft);
}

.page-about .about-chapter:first-child {
  border-top: 0;
  padding-top: 4px;
}

.page-about .about-chapter:last-child {
  padding-bottom: 8px;
}

.page-about .about-chapter__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 16px;
}

.page-about .about-chapter__idx {
  flex: none;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--gold);
}

.page-about .about-chapter__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(20px, 3.6vw, 29px);
  line-height: 1.32;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-about .about-lede {
  margin: 0 0 24px;
  max-width: var(--about-inner);
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--paper-dim);
}

.page-about .mono-note {
  margin: 18px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.9;
  letter-spacing: .04em;
  color: var(--paper-faint);
}

.page-about .about-link {
  color: var(--gold-lite);
  text-decoration: none;
  border-bottom: 1px solid rgba(246, 223, 168, .45);
}

.page-about .about-link:hover {
  color: var(--coral);
  border-bottom-color: var(--coral);
}

/* ---------- 图片 ---------- */
.page-about .figure {
  margin: 0 0 26px;
}

.page-about .figure__media {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--about-soft);
  background: linear-gradient(150deg, var(--ink-800), var(--ink-900));
}

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

.page-about .figure__cap {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: .03em;
  color: var(--paper-faint);
}

.page-about .figure--tall {
  margin-top: 26px;
}

/* ---------- 时间轴 ---------- */
.page-about .tl {
  position: relative;
  margin: 0;
  padding: 4px 0 0 28px;
  list-style: none;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold) 0%, var(--rail) 55%, rgba(27, 51, 88, 0) 100%);
}

.page-about .tl__item {
  position: relative;
  padding-bottom: 26px;
}

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 5px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ink-900);
  border: 2px solid var(--gold);
  box-shadow: 0 0 0 4px rgba(227, 182, 102, .08);
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease);
}

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

.page-about .tl__item:last-child::before {
  border-color: var(--coral);
  box-shadow: 0 0 0 4px rgba(255, 106, 69, .14);
}

.page-about .tl__item:hover::before {
  border-color: var(--gold-lite);
  box-shadow: 0 0 0 6px rgba(246, 223, 168, .14);
}

.page-about .tl__year {
  display: inline-block;
  margin-bottom: 5px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--gold);
}

.page-about .tl__title {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 16.5px;
  line-height: 1.45;
  color: var(--paper);
}

.page-about .tl__text {
  margin: 0;
  max-width: 40em;
  font-size: 14.5px;
  line-height: 1.88;
  color: var(--paper-dim);
}

/* ---------- 三组轮候面板 ---------- */
.page-about .crews {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .crew {
  position: relative;
  padding: 22px 18px 18px;
  border-radius: var(--radius);
  border: 1px solid var(--about-soft);
  background: var(--panel);
  overflow: hidden;
  transition: border-color .2s var(--ease), transform .2s var(--ease);
}

.page-about .crew::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gold);
}

.page-about .crew--chan::after {
  background: var(--violet);
}

.page-about .crew--sup::after {
  background: var(--jade);
}

.page-about .crew:hover {
  border-color: var(--about-hair);
  transform: translateY(-2px);
}

.page-about .crew__code {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--gold-lite);
}

.page-about .crew--chan .crew__code {
  color: var(--violet);
}

.page-about .crew--sup .crew__code {
  color: var(--jade);
}

.page-about .crew__name {
  margin: 7px 0 10px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 19px;
  color: var(--paper);
}

.page-about .crew__duty {
  margin: 0 0 14px;
  font-size: 14.5px;
  line-height: 1.88;
  color: var(--paper-dim);
}

.page-about .crew__shift {
  display: block;
  padding-top: 11px;
  border-top: 1px dashed var(--about-soft);
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.7;
  letter-spacing: .03em;
  color: var(--paper-faint);
}

/* ---------- 工序流程 ---------- */
.page-about .flow-steps {
  margin: 0;
  border-top: 1px solid var(--about-soft);
}

.page-about .fs {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 6px 14px;
  padding: 16px 0;
  border-bottom: 1px solid var(--about-soft);
}

.page-about .fs__idx {
  font-family: var(--font-mono);
  font-size: 19px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--gold);
}

.page-about .fs__name {
  margin: 0 0 5px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 16px;
  color: var(--paper);
}

.page-about .fs__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.86;
  color: var(--paper-dim);
}

.page-about .fs__time {
  grid-column: 2;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--paper-faint);
}

/* ---------- 维护窗口 ---------- */
.page-about .maint {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
}

.page-about .maint__card {
  padding: 22px 18px 20px;
  border-radius: var(--radius);
  border: 1px solid rgba(122, 108, 240, .38);
  background: linear-gradient(158deg, rgba(122, 108, 240, .16), rgba(8, 18, 42, .92) 68%);
}

.page-about .maint__label {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--violet);
}

.page-about .maint__time {
  display: block;
  margin-bottom: 12px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(26px, 8vw, 38px);
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-about .maint__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--paper-dim);
}

.page-about .cal {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 5px;
  margin-top: 20px;
}

.page-about .cal__cell {
  aspect-ratio: 1 / 1;
  border-radius: 5px;
  background: rgba(27, 51, 88, .55);
  border: 1px solid rgba(27, 51, 88, .95);
}

.page-about .cal__cell--hot {
  background: var(--violet);
  border-color: var(--violet);
  box-shadow: 0 0 0 3px rgba(122, 108, 240, .22);
}

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

.page-about .maint__list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--about-soft);
}

.page-about .maint__list li {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--about-soft);
}

.page-about .maint__k {
  flex: none;
  width: 5.4em;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--gold);
  line-height: 2;
}

.page-about .maint__v {
  font-size: 14px;
  line-height: 1.8;
  color: var(--paper-dim);
}

/* ---------- 资源互认 ---------- */
.page-about .partner-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-bottom: 26px;
}

.page-about .partner-card {
  padding: 20px 18px;
  border-radius: var(--radius);
  border: 1px solid var(--about-soft);
  background: var(--panel);
}

.page-about .partner-card--violet {
  border-color: rgba(122, 108, 240, .34);
}

.page-about .partner-card--jade {
  border-color: rgba(63, 168, 160, .34);
}

.page-about .partner-card--copper {
  border-color: rgba(201, 138, 75, .34);
}

.page-about .partner-code {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--paper-faint);
}

.page-about .partner-card__title {
  margin: 0 0 9px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 17px;
  color: var(--paper);
}

.page-about .partner-card__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.86;
  color: var(--paper-dim);
}

.page-about .disclosure {
  border: 1px solid var(--about-soft);
  border-radius: var(--radius);
  background: rgba(16, 32, 63, .5);
}

.page-about .disclosure__summary {
  cursor: pointer;
  padding: 15px 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--gold-lite);
  list-style: none;
}

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

.page-about .disclosure__summary::before {
  content: "＋ ";
  color: var(--gold);
}

.page-about .disclosure[open] .disclosure__summary::before {
  content: "－ ";
}

.page-about .disclosure__body {
  padding: 0 18px 18px;
}

.page-about .check-list {
  margin: 0;
  padding: 0 0 0 18px;
  list-style: none;
}

.page-about .check-list li {
  position: relative;
  padding: 7px 0;
  font-size: 14.5px;
  line-height: 1.86;
  color: var(--paper-dim);
}

.page-about .check-list li::before {
  content: "";
  position: absolute;
  left: -18px;
  top: 16px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gold);
}

/* ---------- 运营指标 ---------- */
.page-about .metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  border: 1px solid var(--about-soft);
  border-radius: var(--radius);
  background: var(--about-soft);
  overflow: hidden;
}

.page-about .metric {
  padding: 18px 15px;
  background: var(--ink-800);
}

.page-about .metric__num {
  display: block;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(23px, 6vw, 32px);
  line-height: 1.1;
  letter-spacing: -.02em;
  color: var(--gold-lite);
}

.page-about .metric__num small {
  margin-left: 3px;
  font-size: .48em;
  font-weight: 600;
  letter-spacing: 0;
}

.page-about .metric__label {
  display: block;
  margin-top: 8px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--paper-faint);
}

/* ---------- 结尾行动区 ---------- */
.page-about .about-cta {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  margin-top: 28px;
  padding: 24px 20px;
  border-radius: var(--radius);
  border: 1px solid var(--about-hair);
  background: linear-gradient(118deg, rgba(227, 182, 102, .14), rgba(8, 18, 42, .94) 62%);
}

.page-about .about-cta__title {
  margin: 0 0 7px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 18.5px;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .about-cta__text {
  margin: 0;
  max-width: 38em;
  font-size: 14.5px;
  line-height: 1.88;
  color: var(--paper-dim);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-foot-note {
  margin-top: 22px;
}

/* ---------- 平板 ---------- */
@media (min-width: 640px) {
  .page-about .crews {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .metrics {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .partner-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .fs {
    grid-template-columns: 46px minmax(0, 1fr) 118px;
    align-items: start;
  }

  .page-about .fs__time {
    grid-column: 3;
    text-align: right;
    padding-top: 4px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 940px) {
  .page-about .about-layout {
    grid-template-columns: var(--about-track) minmax(0, 1fr);
    gap: 56px;
    padding: 34px 0 88px;
  }

  .page-about .about-rail__list {
    position: sticky;
    top: 108px;
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding: 0;
    border-left: 1px solid var(--about-soft);
  }

  .page-about .about-rail__link {
    margin-left: -1px;
    padding: 11px 10px 11px 16px;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
  }

  .page-about .about-rail .rail__item[aria-current="true"] .about-rail__link {
    background: none;
    border-color: transparent;
    border-left-color: var(--coral);
  }

  .page-about .crews {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .partner-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-chapter {
    padding: 38px 0 58px;
  }

  .page-about .about-chapter__head {
    gap: 20px;
  }

  .page-about .figure--offset {
    width: 86%;
    margin-left: auto;
  }

  .page-about .figure--tall {
    width: 72%;
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 32px;
    padding: 30px 32px;
  }
}

@media (min-width: 1180px) {
  .page-about .maint {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    align-items: start;
    gap: 40px;
  }

  .page-about .maint__card {
    padding: 28px 26px 24px;
  }

  .page-about .figure--tall {
    width: 100%;
    margin-top: 0;
  }

  .page-about .about-head {
    padding: 26px 0 40px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .crew,
  .page-about .about-rail__link,
  .page-about .tl__item::before {
    transition: none;
  }

  .page-about .crew:hover {
    transform: none;
  }
}
<<<END>>>