.page-about {
  --about-rule: rgba(236, 233, 225, .13);
  --about-rule-ink: rgba(11, 16, 38, .14);
  --about-body: rgba(236, 233, 225, .8);
  --about-body-ink: rgba(11, 16, 38, .78);
  background: var(--night);
  color: var(--paper-text);
  overflow-x: clip;
}

.page-about a:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 3px;
  border-radius: 8px;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumbs {
  position: relative;
  z-index: 3;
  padding: 18px 0 4px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  padding: clamp(36px, 6vw, 84px) 0 clamp(52px, 7vw, 104px);
}

.page-about .about-hero__media {
  position: absolute;
  inset: 0;
  z-index: -2;
  overflow: hidden;
}

.page-about .about-hero__media img {
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  object-position: 50% 42%;
  opacity: .6;
  filter: saturate(.78);
}

.page-about .about-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(11, 16, 38, .5) 0%, rgba(11, 16, 38, .84) 48%, var(--night) 100%),
    linear-gradient(90deg, rgba(11, 16, 38, .93) 0%, rgba(11, 16, 38, .34) 62%, rgba(11, 16, 38, .78) 100%);
}

.page-about .about-hero__eyebrow {
  color: var(--signal);
}

.page-about .about-hero__title {
  margin: 16px 0 0;
  font-family: var(--font-display);
  font-size: clamp(38px, 8vw, 96px);
  line-height: 1.05;
  letter-spacing: -.015em;
  font-weight: 700;
  color: var(--paper-text);
  max-width: 18ch;
}

.page-about .about-hero__lede {
  max-width: 62ch;
  margin: clamp(20px, 3vw, 30px) 0 0;
  font-size: clamp(16px, 1.6vw, 19px);
  line-height: 1.85;
  color: rgba(236, 233, 225, .86);
}

.page-about .about-hero__ticker {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: clamp(30px, 4vw, 48px) 0 0;
  padding: 0;
  list-style: none;
  max-width: 900px;
}

.page-about .about-hero__ticker li {
  padding: 16px 18px;
  border-radius: var(--r-card);
  border: 1px solid var(--line);
  background: rgba(18, 26, 56, .66);
}

.page-about .about-hero__tnum {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(26px, 3.4vw, 38px);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--signal);
}

.page-about .about-hero__tlabel {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--mist);
}

@media (min-width: 760px) {
  .page-about .about-hero__ticker {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 阶段区块骨架 ---------- */
.page-about .phase {
  position: relative;
  padding: clamp(48px, 7vw, 104px) 0;
}

.page-about .phase--night {
  background: var(--night);
}

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

.page-about .phase__track {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 16px;
}

.page-about .phase__node {
  flex: none;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 0 4px rgba(42, 245, 176, .16);
}

.page-about .phase__stamp {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--signal);
}

.page-about .phase--paper .phase__stamp {
  color: var(--moss);
}

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

.page-about .phase--paper .phase__label {
  color: rgba(11, 16, 38, .55);
}

.page-about .phase__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(26px, 4.6vw, 52px);
  line-height: 1.1;
  letter-spacing: -.01em;
  font-weight: 700;
  color: var(--paper-text);
  max-width: 22ch;
}

.page-about .phase--paper .phase__title {
  color: var(--ink);
}

.page-about .phase__body > p,
.page-about .phase__copy > p {
  margin: 1.1em 0 0;
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--about-body);
}

.page-about .phase--paper .phase__body > p,
.page-about .phase--paper .phase__copy > p {
  color: var(--about-body-ink);
}

.page-about .phase__lede {
  margin-top: clamp(16px, 2.4vw, 24px) !important;
  max-width: 60ch !important;
  font-size: clamp(17px, 1.7vw, 20px) !important;
  line-height: 1.8 !important;
  color: rgba(236, 233, 225, .92) !important;
}

.page-about .phase--paper .phase__lede {
  color: rgba(11, 16, 38, .86) !important;
}

.page-about .phase__actions {
  margin-top: clamp(22px, 3vw, 32px) !important;
}

/* ---------- 分段栏：编号条目 ---------- */
.page-about .lanes {
  list-style: none;
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 0;
}

.page-about .lanes__item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: clamp(12px, 2vw, 28px);
  padding: clamp(20px, 2.6vw, 28px) 0;
  border-top: 1px solid var(--about-rule);
}

.page-about .phase--paper .lanes__item {
  border-top-color: var(--about-rule-ink);
}

.page-about .lanes__item:last-child {
  border-bottom: 1px solid var(--about-rule);
}

.page-about .phase--paper .lanes__item:last-child {
  border-bottom-color: var(--about-rule-ink);
}

.page-about .lanes__idx {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(22px, 2.6vw, 32px);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--signal);
}

.page-about .phase--paper .lanes__idx {
  color: var(--moss);
}

.page-about .lanes__text h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(18px, 2vw, 24px);
  line-height: 1.3;
  font-weight: 600;
  color: var(--paper-text);
}

.page-about .phase--paper .lanes__text h3 {
  color: var(--ink);
}

.page-about .lanes__text p {
  margin: .7em 0 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-body);
}

.page-about .phase--paper .lanes__text p {
  color: var(--about-body-ink);
}

@media (min-width: 768px) {
  .page-about .lanes__item {
    grid-template-columns: 84px minmax(0, 1fr);
  }
}

.page-about .phase__foot {
  margin: clamp(20px, 3vw, 32px) 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--clay);
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-body-ink);
}

/* ---------- 非对称分栏 ---------- */
.page-about .phase__split {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
  margin-top: clamp(22px, 3.4vw, 36px);
  align-items: start;
}

@media (min-width: 880px) {
  .page-about .phase__split {
    grid-template-columns: minmax(0, 1fr) minmax(0, .88fr);
  }
}

/* ---------- 图片 ---------- */
.page-about .media {
  margin: 0;
}

.page-about .media__frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: linear-gradient(140deg, var(--deck), var(--night));
  aspect-ratio: 3 / 2;
}

.page-about .phase--paper .media__frame {
  border-color: var(--about-rule-ink);
  background: linear-gradient(140deg, var(--slate), var(--night));
}

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

.page-about .media__caption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

.page-about .phase--paper .media__caption {
  color: rgba(11, 16, 38, .58);
}

/* ---------- 数字锚点 ---------- */
.page-about .board {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(12px, 2vw, 20px);
  margin-top: clamp(28px, 4vw, 44px);
}

.page-about .board__cell {
  padding: clamp(16px, 2vw, 24px);
  border-radius: var(--r-card);
  border: 1px solid var(--line-soft);
  background: var(--deck);
}

.page-about .board__num {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(26px, 4.4vw, 54px);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--signal);
}

.page-about .board__label {
  display: block;
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.55;
  color: var(--mist);
}

@media (min-width: 960px) {
  .page-about .board {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 班次表 ---------- */
.page-about .shifts-wrap {
  margin-top: clamp(28px, 4vw, 42px);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-about .shifts {
  width: 100%;
  min-width: 480px;
  border-collapse: collapse;
  text-align: left;
  font-size: 14px;
}

.page-about .shifts__caption {
  caption-side: top;
  text-align: left;
  padding-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--signal);
}

.page-about .shifts th,
.page-about .shifts td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--line-soft);
  vertical-align: top;
}

.page-about .shifts thead th {
  font-size: 12px;
  letter-spacing: .08em;
  font-weight: 500;
  color: var(--mist);
  border-bottom-color: var(--line);
}

.page-about .shifts tbody th {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  font-weight: 500;
  color: var(--paper-text);
  white-space: nowrap;
}

.page-about .shifts tbody td {
  color: var(--about-body);
}

.page-about .shifts tbody td.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--signal);
  white-space: nowrap;
}

.page-about .shifts__row {
  transition: background .25s ease;
}

.page-about .shifts__row:hover {
  background: rgba(42, 245, 176, .07);
}

/* ---------- 五维胶囊 ---------- */
.page-about .dims {
  list-style: none;
  margin: clamp(22px, 3.4vw, 34px) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .dims__item {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 18px;
  border-radius: var(--r-pill);
  border: 1px solid var(--about-rule-ink);
  background: rgba(11, 16, 38, .045);
  font-size: 15px;
  color: var(--ink);
}

.page-about .dims__k {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--moss);
}

/* ---------- 页尾导航 ---------- */
.page-about .about-next {
  background: var(--night);
  border-top: 1px solid var(--line-soft);
  padding: clamp(48px, 7vw, 96px) 0 clamp(56px, 8vw, 110px);
}

.page-about .about-next__title {
  margin: 0 0 clamp(22px, 3vw, 34px);
  font-family: var(--font-display);
  font-size: clamp(24px, 3.6vw, 40px);
  line-height: 1.14;
  font-weight: 700;
  color: var(--paper-text);
}

.page-about .about-next__links {
  display: grid;
  gap: 12px;
}

.page-about .about-next__link {
  display: block;
  padding: 20px 22px;
  border-radius: var(--r-card);
  border: 1px solid var(--line-soft);
  background: var(--deck);
  text-decoration: none;
  transition: border-color .25s ease, background .25s ease, transform .25s ease;
}

.page-about .about-next__link:hover {
  border-color: var(--signal);
  background: var(--slate);
  transform: translateY(-2px);
}

.page-about .about-next__lk {
  display: block;
  font-size: 16px;
  font-weight: 600;
  color: var(--signal);
}

.page-about .about-next__ld {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

@media (min-width: 760px) {
  .page-about .about-next__links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1120px) {
  .page-about .about-next__links {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 桌面端竖向时间刻度 ---------- */
@media (min-width: 900px) {
  .page-about .phase__grid {
    display: grid;
    grid-template-columns: 148px minmax(0, 1fr);
    gap: clamp(24px, 4vw, 60px);
  }

  .page-about .phase__track {
    display: block;
    position: relative;
    margin-bottom: 0;
    padding: 30px 0 0 26px;
  }

  .page-about .phase__track::before {
    content: "";
    position: absolute;
    left: 7px;
    top: 2px;
    bottom: -10px;
    width: 1px;
    background: var(--about-rule);
  }

  .page-about .phase--paper .phase__track::before {
    background: var(--about-rule-ink);
  }

  .page-about .phase__node {
    position: absolute;
    left: 0;
    top: 1px;
    width: 15px;
    height: 15px;
    background: var(--night);
    border: 1px solid var(--line);
    box-shadow: none;
    transition: background .45s ease, border-color .45s ease, box-shadow .45s ease;
  }

  .page-about .phase--paper .phase__node {
    background: var(--paper);
    border-color: var(--about-rule-ink);
  }

  .page-about .phase.is-in .phase__node {
    background: var(--signal);
    border-color: var(--signal);
    box-shadow: 0 0 0 7px rgba(42, 245, 176, .14);
  }

  .page-about .phase__stamp {
    display: block;
    margin-bottom: 10px;
  }

  .page-about .phase__label {
    display: block;
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .phase__node,
  .page-about .shifts__row,
  .page-about .about-next__link {
    transition: none;
  }

  .page-about .about-next__link:hover {
    transform: none;
  }
}