.page-about {
  --about-rail: 216px;
  display: block;
  position: relative;
  overflow-x: clip;
}

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

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(18px, 3vw, 32px) 0 clamp(36px, 5vw, 72px);
  background:
    radial-gradient(92% 120% at 88% 0%, rgba(109, 91, 208, 0.22), transparent 62%),
    radial-gradient(72% 90% at 2% 100%, rgba(14, 59, 74, 0.5), transparent 70%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(199, 211, 232, 0.07) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(199, 211, 232, 0.07) 1px, transparent 1px);
  background-size: 68px 68px;
  -webkit-mask-image: radial-gradient(120% 95% at 74% 4%, #000 0%, transparent 74%);
  mask-image: radial-gradient(120% 95% at 74% 4%, #000 0%, transparent 74%);
  pointer-events: none;
}

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

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 44px);
  margin-top: clamp(22px, 3vw, 34px);
}

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

.page-about .about-seal {
  display: inline-block;
  transform: rotate(-3.5deg);
  transform-origin: left bottom;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--amber);
  border: 1px solid rgba(242, 181, 68, 0.45);
  border-radius: 3px;
  padding: 5px 9px 4px;
  margin-bottom: 14px;
}

.page-about .about-hero h1 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(28px, 5.4vw, 56px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-about .about-hero__lead {
  margin: 18px 0 0;
  max-width: 36em;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--silver);
}

.page-about .about-facts {
  list-style: none;
  margin: clamp(22px, 3vw, 30px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.page-about .about-facts li {
  background: var(--glass);
  padding: 13px 15px;
}

.page-about .about-facts b {
  display: block;
  font-family: var(--font-mono);
  font-size: 22px;
  line-height: 1.1;
  color: var(--amber);
  letter-spacing: 0.02em;
}

.page-about .about-facts span {
  display: block;
  margin-top: 5px;
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--mist);
}

.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 30px);
}

.page-about .about-hero__media {
  margin: 0;
  position: relative;
  border-radius: var(--radius);
  box-shadow: 0 34px 80px -46px rgba(109, 91, 208, 0.95);
}

/* ---------- 正文骨架 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3vw, 40px);
  padding-bottom: clamp(56px, 8vw, 96px);
}

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

.page-about .about-toc__title {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--mist);
  text-transform: uppercase;
}

.page-about .about-toc__list {
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(146px, 1fr));
  gap: 2px;
}

.page-about .about-toc__list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 10px;
  border-left: 2px solid transparent;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--mist);
  font-size: 13.5px;
  line-height: 1.4;
  text-decoration: none;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-toc__list a:hover {
  color: var(--white);
  background: var(--glass);
}

.page-about .about-toc__list a[data-current] {
  color: var(--amber);
  border-left-color: var(--amber);
  background: var(--amber-soft);
}

.page-about .about-toc__list .mono {
  font-size: 11px;
  opacity: 0.8;
}

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

.page-about .about-sec {
  padding: clamp(30px, 4.4vw, 54px) 0;
  border-top: 1px solid var(--line);
}

.page-about .about-sec:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: 14px;
  align-items: start;
  margin-bottom: clamp(18px, 2.4vw, 26px);
}

.page-about .about-head__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--amber);
  padding-top: 0.5em;
}

.page-about .about-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(21px, 2.9vw, 33px);
  line-height: 1.26;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-about .about-text {
  margin: 0;
  font-size: clamp(14.5px, 1.5vw, 16px);
  line-height: 1.85;
  color: var(--silver);
}

.page-about .about-text + .about-text {
  margin-top: 14px;
}

/* ---------- 轨道与四区 ---------- */
.page-about .about-orbit {
  display: block;
  width: 100%;
  height: auto;
  margin: clamp(18px, 2.8vw, 28px) 0 0;
}

.page-about .about-zones {
  list-style: none;
  margin: clamp(14px, 2vw, 22px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .about-zone {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--glass);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-zone:hover {
  border-color: var(--line-strong);
  background: rgba(18, 38, 77, 0.68);
  transform: translateY(-2px);
}

.page-about .about-zone__code {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--amber);
}

.page-about .about-zone h3 {
  margin: 9px 0 0;
  font-family: var(--font-display);
  font-size: 16px;
  color: var(--white);
}

.page-about .about-zone__text {
  margin: 8px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-zone__link {
  display: inline-block;
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--amber);
  text-decoration: none;
  border-bottom: 1px solid rgba(242, 181, 68, 0.38);
  padding-bottom: 2px;
}

.page-about .about-zone__link:hover {
  border-bottom-color: var(--amber);
}

/* ---------- 核对维度 ---------- */
.page-about .dims {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .dim {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 11px;
  border: 1px solid var(--line-strong);
  border-radius: 99px;
  background: rgba(18, 38, 77, 0.4);
  font-size: 12.5px;
  color: var(--silver);
}

.page-about .dim .mono {
  font-size: 11px;
  color: var(--amber);
}

.page-about .about-figure {
  margin: clamp(20px, 3vw, 28px) 0 0;
}

/* ---------- 勾选清单 ---------- */
.page-about .check-list {
  list-style: none;
  margin: clamp(18px, 2.6vw, 26px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.page-about .check-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 15px;
  background: rgba(7, 11, 26, 0.78);
}

.page-about .check-item__box {
  flex: none;
  width: 16px;
  height: 16px;
  margin: 3px 0 0;
  accent-color: var(--amber);
  cursor: pointer;
}

.page-about .check-item__label {
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--silver);
  cursor: pointer;
  transition: color var(--dur) var(--ease);
}

.page-about .check-item__label .mono {
  margin-right: 9px;
  font-size: 11.5px;
  color: var(--mist);
}

.page-about .check-item__box:checked + .check-item__label {
  color: var(--white);
  text-decoration: line-through;
  text-decoration-color: rgba(242, 181, 68, 0.65);
}

/* ---------- 版本阶段 ---------- */
.page-about .stages {
  margin: clamp(18px, 2.6vw, 26px) 0;
  display: grid;
  gap: 10px;
}

.page-about .stage {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--glass);
  overflow: hidden;
}

.page-about .stage[open] {
  border-color: var(--line-strong);
}

.page-about .stage__summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .stage__no {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--amber);
}

.page-about .stage__name {
  font-family: var(--font-display);
  font-size: 15px;
  color: var(--white);
}

.page-about .stage__arrow {
  width: 8px;
  height: 8px;
  margin-left: auto;
  border-right: 1.5px solid var(--amber);
  border-bottom: 1.5px solid var(--amber);
  transform: rotate(45deg);
  transition: transform var(--dur) var(--ease);
}

.page-about .stage[open] .stage__arrow {
  transform: rotate(-135deg);
}

.page-about .stage p {
  margin: 0;
  padding: 0 16px 16px;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 团队 ---------- */
.page-about .team-grid {
  list-style: none;
  margin: clamp(18px, 2.6vw, 26px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
}

.page-about .team-card {
  padding: 15px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--glass);
}

.page-about .team-card__role {
  display: block;
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--amber);
}

.page-about .flow {
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0 0 0 24px;
  border-left: 1px solid var(--line-strong);
  display: grid;
  gap: 18px;
}

.page-about .flow__item {
  position: relative;
  display: grid;
  gap: 4px;
}

.page-about .flow__item::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 6px;
  width: 9px;
  height: 9px;
  border-radius: 2px;
  background: var(--amber);
}

.page-about .flow__no {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-about .flow__name {
  font-family: var(--font-display);
  font-size: 15px;
  color: var(--white);
}

.page-about .flow__desc {
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 场景 ---------- */
.page-about .scene-grid {
  margin-top: clamp(20px, 3vw, 28px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .scene {
  padding: 17px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(27, 36, 54, 0.62);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .scene:hover {
  border-color: var(--line-strong);
  background: rgba(27, 36, 54, 0.85);
}

.page-about .scene h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 15px;
  color: var(--white);
}

.page-about .scene .about-text {
  margin-top: 8px;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .scene__link {
  display: inline-block;
  margin-top: 11px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--amber);
  text-decoration: none;
  border-bottom: 1px solid rgba(242, 181, 68, 0.35);
  padding-bottom: 2px;
}

.page-about .scene__link:hover {
  border-bottom-color: var(--amber);
}

/* ---------- 收束 ---------- */
.page-about .about-cta {
  margin-top: clamp(26px, 4vw, 44px);
  padding: clamp(22px, 3vw, 34px);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(18, 38, 77, 0.88), rgba(14, 59, 74, 0.55));
}

.page-about .about-cta__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(18px, 2.4vw, 24px);
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-about .about-cta .about-text {
  margin-top: 10px;
  max-width: 40em;
  color: var(--silver);
}

.page-about .about-cta .about-actions {
  margin-top: 20px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-zones {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

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

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
    align-items: end;
    gap: clamp(30px, 4vw, 60px);
  }

  .page-about .about-body {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(36px, 4vw, 72px);
    align-items: start;
  }

  .page-about .about-toc {
    position: sticky;
    top: 104px;
    padding-top: 4px;
  }

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

@media (min-width: 1180px) {
  .page-about .about-zone {
    padding: 20px 22px;
  }

  .page-about .scene {
    padding: 20px 22px;
  }
}
<<<END>>>