.page-about {
  --about-pad: clamp(20px, 4vw, 56px);
  --about-tick: clamp(14px, 3vw, 30px);
  display: block;
  color: var(--kt-ice);
}

.page-about .about-crumbs {
  padding-top: clamp(14px, 2.6vw, 26px);
}

.page-about .about-crumbs a {
  color: var(--kt-mute);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .18s ease, border-color .18s ease;
}

.page-about .about-crumbs a:hover,
.page-about .about-crumbs a:focus-visible {
  color: var(--kt-cyan);
  border-bottom-color: var(--kt-cyan);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 5vw, 62px) 0 clamp(30px, 5vw, 68px);
  border-bottom: 2px solid var(--kt-carbon);
  background:
    radial-gradient(120% 92% at 90% -6%, rgba(41, 240, 208, .13), transparent 58%),
    radial-gradient(96% 84% at 2% 104%, rgba(255, 107, 44, .11), transparent 62%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(30, 58, 95, .6) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(30, 58, 95, .6) 1px, transparent 1px);
  background-size: 68px 68px;
  -webkit-mask-image: linear-gradient(to bottom, #000 6%, transparent 84%);
  mask-image: linear-gradient(to bottom, #000 6%, transparent 84%);
  opacity: .6;
  pointer-events: none;
}

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

.page-about .about-hero__title {
  margin: clamp(12px, 2vw, 20px) 0 0;
  font-size: clamp(2rem, 6.4vw, 4.6rem);
  font-weight: 200;
  line-height: 1.04;
  letter-spacing: -.02em;
  color: var(--kt-ice);
}

.page-about .about-hero__verb {
  display: inline-block;
  margin: 0 .18em;
  font-weight: 900;
  color: var(--kt-orange);
  letter-spacing: -.03em;
}

.page-about .about-hero__lede {
  max-width: 62ch;
  margin: clamp(18px, 2.6vw, 28px) 0 0;
  font-size: clamp(1rem, 1.55vw, 1.12rem);
  line-height: 1.78;
  color: var(--kt-ice);
  opacity: .86;
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(24px, 4vw, 44px);
  background: var(--kt-line);
  border: 2px solid var(--kt-line);
  box-shadow: var(--kt-hard);
}

.page-about .about-fact {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: clamp(14px, 2.2vw, 22px);
  background: var(--kt-board);
}

.page-about .about-fact__num {
  font-size: clamp(1.6rem, 3.6vw, 2.4rem);
  font-weight: 700;
  line-height: 1;
  color: var(--kt-cyan);
}

.page-about .about-fact__key {
  font-size: .8rem;
  letter-spacing: .06em;
  color: var(--kt-mute);
}

/* ---------- 团队构成 ---------- */

.page-about .about-compose .kt-sechead__index {
  color: var(--kt-cyan);
}

.page-about .about-bar {
  display: flex;
  height: clamp(74px, 11vw, 108px);
  margin: 0 0 clamp(22px, 3.4vw, 36px);
  border: 2px solid var(--kt-line);
  background: var(--kt-carbon);
  box-shadow: var(--kt-hard);
  overflow: hidden;
}

.page-about .about-bar__seg {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 2px;
  min-width: 0;
  padding: 10px 12px;
  border-right: 2px solid var(--kt-carbon);
  transition: filter .2s ease, flex-grow .3s ease;
}

.page-about .about-bar__seg:last-child {
  border-right: 0;
}

.page-about .about-bar__seg--edit {
  flex: 18 1 0;
  background: linear-gradient(180deg, rgba(41, 240, 208, .34), rgba(14, 122, 107, .62));
}

.page-about .about-bar__seg--data {
  flex: 4 1 0;
  background: linear-gradient(180deg, rgba(255, 107, 44, .36), rgba(255, 107, 44, .58));
}

.page-about .about-bar__seg--design {
  flex: 3 1 0;
  background: linear-gradient(180deg, rgba(255, 161, 102, .3), rgba(255, 107, 44, .4));
}

.page-about .about-bar__seg:hover {
  filter: brightness(1.22);
}

.page-about .about-bar__count {
  font-size: clamp(1.15rem, 2.2vw, 1.6rem);
  font-weight: 700;
  line-height: 1;
  color: var(--kt-ice);
  text-shadow: 0 0 12px rgba(6, 12, 22, .8);
}

.page-about .about-bar__label {
  font-size: clamp(.66rem, 1.1vw, .78rem);
  letter-spacing: .05em;
  color: var(--kt-ice);
  opacity: .82;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.page-about .about-roles {
  display: grid;
  gap: clamp(14px, 2.2vw, 22px);
  grid-template-columns: minmax(0, 1fr);
}

.page-about .about-role {
  position: relative;
  padding: clamp(18px, 2.6vw, 26px);
  border: 2px solid var(--kt-line);
  background: var(--kt-board);
  box-shadow: var(--kt-hard);
  transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}

.page-about .about-role:hover,
.page-about .about-role:focus-visible {
  transform: translate(-2px, -2px);
  border-color: var(--kt-cyan);
  box-shadow: var(--kt-hard-lg);
  outline: none;
}

.page-about .about-role:focus-visible {
  outline: 2px solid var(--kt-orange);
  outline-offset: 3px;
}

.page-about .about-role__id {
  margin: 0 0 10px;
  font-size: .72rem;
  letter-spacing: .12em;
  color: var(--kt-orange-soft);
}

.page-about .about-role__title {
  margin: 0 0 10px;
  font-size: clamp(1.08rem, 1.9vw, 1.32rem);
  font-weight: 800;
  line-height: 1.35;
  color: var(--kt-ice);
}

.page-about .about-role__body {
  margin: 0;
  font-size: .94rem;
  line-height: 1.74;
  color: var(--kt-mute);
}

.page-about .about-role__hover {
  margin: 0;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  font-size: .86rem;
  line-height: 1.7;
  color: var(--kt-cyan);
  transition: max-height .26s ease, opacity .26s ease, margin-top .26s ease;
}

.page-about .about-role:hover .about-role__hover,
.page-about .about-role:focus-visible .about-role__hover,
.page-about .about-role:focus-within .about-role__hover {
  max-height: 8rem;
  margin-top: 12px;
  opacity: 1;
}

/* ---------- 生产时间线 ---------- */

.page-about .about-flow {
  border-top: 2px solid var(--kt-line);
  border-bottom: 2px solid var(--kt-line);
  background: linear-gradient(180deg, rgba(16, 30, 56, .72), rgba(10, 20, 40, .2));
}

.page-about .about-flow__grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  grid-template-columns: minmax(0, 1fr);
}

.page-about .about-timeline {
  position: relative;
  margin: 0;
  padding: 4px 0 0 34px;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  top: 12px;
  bottom: 14px;
  left: 9px;
  width: 1px;
  background: linear-gradient(180deg, var(--kt-cyan), var(--kt-line) 70%, transparent);
}

.page-about .about-timeline__node {
  position: relative;
  padding: 0 0 clamp(24px, 3.6vw, 38px);
}

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

.page-about .about-timeline__node::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 6px;
  width: 11px;
  height: 11px;
  background: var(--kt-void);
  border: 2px solid var(--kt-cyan);
  transform: rotate(45deg);
  box-shadow: 0 0 0 4px rgba(41, 240, 208, .12);
}

.page-about .about-timeline__stamp {
  display: inline-block;
  margin-bottom: 8px;
  padding: 3px 9px;
  font-size: .74rem;
  letter-spacing: .08em;
  color: var(--kt-carbon);
  background: var(--kt-cyan);
  border: 2px solid var(--kt-carbon);
}

.page-about .about-timeline__title {
  margin: 0 0 8px;
  font-size: clamp(1.06rem, 1.9vw, 1.3rem);
  font-weight: 800;
  color: var(--kt-ice);
}

.page-about .about-timeline__body {
  margin: 0;
  max-width: 46ch;
  font-size: .94rem;
  line-height: 1.76;
  color: var(--kt-mute);
}

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

.page-about .about-flow__figure .kt-figure__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 2px solid var(--kt-line);
  background: var(--kt-board);
}

/* ---------- 值守班次 ---------- */

.page-about .about-shift__figure {
  margin: 0 0 clamp(22px, 3.4vw, 36px);
}

.page-about .about-shift__figure .kt-figure__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 2px solid var(--kt-line);
  box-shadow: var(--kt-hard);
}

.page-about .about-shift__grid {
  display: grid;
  gap: 0;
  grid-template-columns: minmax(0, 1fr);
  border: 2px solid var(--kt-line);
}

.page-about .about-shift__card {
  padding: clamp(18px, 2.6vw, 28px);
  border-bottom: 2px solid var(--kt-line);
  background: var(--kt-board);
  transition: background .2s ease;
}

.page-about .about-shift__card:last-child {
  border-bottom: 0;
}

.page-about .about-shift__card:hover {
  background: rgba(30, 58, 95, .55);
}

.page-about .about-shift__tag {
  margin: 0 0 10px;
  font-size: .72rem;
  letter-spacing: .14em;
  color: var(--kt-orange);
}

.page-about .about-shift__title {
  margin: 0 0 8px;
  font-size: clamp(1.02rem, 1.8vw, 1.22rem);
  font-weight: 800;
  color: var(--kt-ice);
}

.page-about .about-shift__body {
  margin: 0;
  font-size: .93rem;
  line-height: 1.74;
  color: var(--kt-mute);
}

.page-about .about-shift__foot {
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding-left: 16px;
  border-left: 3px solid var(--kt-orange);
  font-size: .92rem;
  line-height: 1.76;
  color: var(--kt-ice);
  opacity: .84;
}

/* ---------- 版本历程 ---------- */

.page-about .about-version .kt-wrap {
  position: relative;
}

.page-about .about-version__bg {
  position: absolute;
  inset: -8% -6% auto -6%;
  z-index: 0;
  opacity: .22;
  pointer-events: none;
}

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

.page-about .about-version .kt-sechead,
.page-about .about-vers {
  position: relative;
  z-index: 1;
}

.page-about .about-vers {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 2px solid var(--kt-line);
}

.page-about .about-vers__item {
  border-bottom: 2px solid var(--kt-line);
}

.page-about .about-vers__box {
  background: transparent;
}

.page-about .about-vers__sum {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 6px 14px;
  padding: clamp(14px, 2.2vw, 22px) 0;
  cursor: pointer;
  list-style: none;
  transition: color .2s ease, padding-left .2s ease;
}

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

.page-about .about-vers__sum:hover {
  padding-left: 10px;
  color: var(--kt-cyan);
}

.page-about .about-vers__sum:focus-visible {
  outline: 2px solid var(--kt-orange);
  outline-offset: 2px;
}

.page-about .about-vers__no {
  grid-row: span 2;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 48px;
  height: 40px;
  font-size: .92rem;
  font-weight: 700;
  color: var(--kt-carbon);
  background: var(--kt-orange);
  border: 2px solid var(--kt-carbon);
}

.page-about .about-vers__name {
  font-size: clamp(1.04rem, 1.9vw, 1.26rem);
  font-weight: 800;
  color: var(--kt-ice);
}

.page-about .about-vers__hint {
  font-size: .78rem;
  letter-spacing: .06em;
  color: var(--kt-mute);
}

.page-about .about-vers__box[open] .about-vers__hint {
  color: var(--kt-cyan);
}

.page-about .about-vers__body {
  padding: 0 0 clamp(16px, 2.4vw, 24px) 62px;
}

.page-about .about-vers__body p {
  margin: 0;
  max-width: 62ch;
  font-size: .94rem;
  line-height: 1.78;
  color: var(--kt-mute);
}

/* ---------- 内容标准 ---------- */

.page-about .about-standard {
  border-top: 2px solid var(--kt-line);
}

.page-about .about-standard__grid {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
  grid-template-columns: minmax(0, 1fr);
}

.page-about .about-standard__col {
  padding: clamp(20px, 2.8vw, 30px);
  border: 2px solid var(--kt-line);
  background: var(--kt-board);
  box-shadow: var(--kt-hard);
}

.page-about .about-standard__col:last-child {
  border-color: var(--kt-orange);
}

.page-about .about-standard__title {
  margin: 0 0 16px;
  padding-bottom: 12px;
  font-size: clamp(1.04rem, 1.9vw, 1.24rem);
  font-weight: 800;
  color: var(--kt-ice);
  border-bottom: 1px solid var(--kt-line);
}

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

.page-about .about-standard__list li {
  position: relative;
  padding-left: 18px;
  margin-bottom: 14px;
  font-size: .93rem;
  line-height: 1.74;
  color: var(--kt-mute);
}

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

.page-about .about-standard__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 8px;
  height: 1px;
  background: var(--kt-cyan);
}

.page-about .about-standard__list strong {
  color: var(--kt-ice);
  font-weight: 700;
}

/* ---------- 覆盖范围 ---------- */

.page-about .about-reach {
  border-top: 2px solid var(--kt-line);
  background:
    radial-gradient(80% 70% at 96% 0%, rgba(255, 107, 44, .1), transparent 62%),
    linear-gradient(180deg, rgba(6, 12, 22, .55), transparent);
}

.page-about .about-reach__layout {
  display: grid;
  gap: clamp(22px, 3.4vw, 40px);
  grid-template-columns: minmax(0, 1fr);
}

.page-about .about-reach__stats {
  display: grid;
  gap: 1px;
  grid-template-columns: minmax(0, 1fr);
  background: var(--kt-line);
  border: 2px solid var(--kt-line);
}

.page-about .about-reach__stat {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: clamp(14px, 2vw, 20px);
  background: var(--kt-board);
}

.page-about .about-reach__num {
  font-size: clamp(1.5rem, 3.4vw, 2.2rem);
  font-weight: 700;
  line-height: 1;
  color: var(--kt-cyan);
}

.page-about .about-reach__key {
  font-size: .88rem;
  line-height: 1.5;
  color: var(--kt-mute);
}

.page-about .about-reach__copy p {
  margin: 0 0 14px;
  max-width: 56ch;
  font-size: .95rem;
  line-height: 1.8;
  color: var(--kt-ice);
  opacity: .86;
}

.page-about .about-reach__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(16px, 2.4vw, 24px);
}

/* ---------- 状态面板内文字兜底 ---------- */

.page-about .kt-status {
  font-family: var(--kt-font-sans);
}

.page-about .kt-status__val--live {
  color: var(--kt-cyan);
}

/* ---------- 响应式 ---------- */

@media (max-width: 640px) {
  .page-about .about-bar {
    flex-direction: column;
    height: auto;
  }

  .page-about .about-bar__seg {
    flex: none;
    min-height: 56px;
    flex-direction: row;
    align-items: baseline;
    justify-content: space-between;
    gap: 12px;
    border-right: 0;
    border-bottom: 2px solid var(--kt-carbon);
  }

  .page-about .about-bar__seg:last-child {
    border-bottom: 0;
  }

  .page-about .about-bar__label {
    font-size: .84rem;
    white-space: normal;
  }

  .page-about .about-vers__body {
    padding-left: 0;
  }

  .page-about .about-vers__sum {
    grid-template-columns: auto minmax(0, 1fr);
  }
}

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

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

  .page-about .about-shift__card {
    border-bottom: 0;
    border-right: 2px solid var(--kt-line);
  }

  .page-about .about-shift__card:last-child {
    border-right: 0;
  }

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

@media (min-width: 900px) {
  .page-about .about-roles {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-flow__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    align-items: start;
  }

  .page-about .about-flow__figure {
    position: sticky;
    top: 96px;
  }

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

  .page-about .about-reach__layout {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    align-items: start;
  }

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

  .page-about .about-vers__sum {
    grid-template-columns: auto minmax(0, 1fr) auto;
    gap: 6px 18px;
  }

  .page-about .about-vers__no {
    grid-row: span 1;
  }

  .page-about .about-vers__name {
    align-self: end;
  }

  .page-about .about-vers__hint {
    grid-row: 1;
    grid-column: 3;
    align-self: end;
    text-align: right;
  }

  .page-about .about-vers__body {
    padding-left: 84px;
  }
}

@media (min-width: 1180px) {
  .page-about .about-hero__lede {
    font-size: 1.14rem;
  }
}
<<<END>>>