.page-about {
  --band-a: #0B1B2B;
  --band-b: #0E2334;
  --band-c: #122A3F;
  --prose-w: 60ch;
  background: var(--band-a);
  color: var(--fog);
  font-family: var(--font-body);
  overflow-x: clip;
}

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

.page-about figure {
  margin: 0;
}

.page-about .breadcrumb {
  padding-top: 4px;
}

/* ---------- 首屏 ---------- */

.page-about .about-lead {
  padding: 24px 0 52px;
  background:
    radial-gradient(120% 90% at 88% -10%, rgba(0, 229, 195, 0.12), transparent 62%),
    linear-gradient(180deg, var(--band-a) 0%, var(--band-a) 72%, var(--band-b) 100%);
}

.page-about .about-lead__grid {
  display: grid;
  gap: 30px;
  margin-top: 26px;
}

.page-about .about-statement {
  font-family: var(--font-display);
  font-weight: 800;
  font-stretch: condensed;
  font-size: clamp(38px, 10.5vw, 84px);
  line-height: 1.02;
  letter-spacing: -0.01em;
  margin: 14px 0 0;
  color: var(--fog);
}

.page-about .about-lede {
  max-width: var(--prose-w);
  margin: 20px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: #C7D4DC;
}

.page-about .about-lead__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-lead__figure {
  position: relative;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
  background: var(--band-b);
  border: 1px solid var(--line);
}

.page-about .about-lead__figure img {
  width: 100%;
  object-fit: cover;
}

.page-about .about-lead__figure .media-caption {
  display: block;
  padding: 10px 14px 12px;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--cyan);
  border-top: 1px solid var(--line);
}

/* ---------- 通用区块 ---------- */

.page-about .about-sec {
  padding: 52px 0;
  position: relative;
}

.page-about .about-sec--turn { background: var(--band-b); }
.page-about .about-sec--routes { background: var(--band-c); }
.page-about .about-sec--who { background: var(--band-b); }
.page-about .about-sec--rhythm { background: var(--band-a); }
.page-about .about-sec--figures { background: var(--band-c); }
.page-about .about-sec--contact { background: var(--band-a); }

.page-about .about-h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-stretch: condensed;
  font-size: clamp(26px, 6.4vw, 42px);
  line-height: 1.12;
  letter-spacing: -0.01em;
  margin: 10px 0 0;
  color: var(--fog);
}

.page-about .about-h2::before {
  content: "";
  display: block;
  width: 26px;
  height: 2px;
  margin-bottom: 14px;
  background: var(--cyan);
  transition: width 0.3s var(--ease);
}

.page-about .about-sec:hover .about-h2::before,
.page-about .about-sec:focus-within .about-h2::before {
  width: 58px;
}

.page-about .about-sub {
  max-width: var(--prose-w);
  margin: 18px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--rock);
}

.page-about .about-prose {
  max-width: var(--prose-w);
}

.page-about .about-prose p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.8;
  color: #C7D4DC;
}

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

/* ---------- 减法 ---------- */

.page-about .about-cols {
  display: grid;
  gap: 28px;
  margin-top: 24px;
}

.page-about .about-note {
  border-left: 2px solid var(--orange);
  padding: 4px 0 4px 16px;
  background: linear-gradient(90deg, rgba(255, 122, 26, 0.1), transparent 70%);
}

.page-about .about-note__label {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.page-about .about-note__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-note__list li {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 8px;
  font-size: 14px;
  line-height: 1.7;
  color: #C7D4DC;
}

.page-about .about-note__list .mono {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--rock);
  letter-spacing: 0.08em;
  padding-top: 2px;
}

/* ---------- 四条主线 ---------- */

.page-about .route-track {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .route-row {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 10px 14px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .route-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--rock);
  padding-top: 5px;
}

.page-about .route-body h3 {
  margin: 0 0 6px;
  font-size: 18px;
  font-weight: 700;
  color: var(--fog);
  letter-spacing: 0.01em;
}

.page-about .route-body p {
  margin: 0;
  max-width: 52ch;
  font-size: 14px;
  line-height: 1.75;
  color: var(--rock);
}

.page-about .route-go {
  grid-column: 1 / -1;
  justify-self: start;
  font-size: 14px;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 195, 0.35);
  padding-bottom: 2px;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .route-go:hover,
.page-about .route-go:focus-visible {
  color: var(--mist);
  border-color: var(--mist);
}

.page-about .about-figure {
  margin-top: 32px;
  border: 1px solid var(--line);
  background: var(--band-b);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
}

.page-about .about-figure img {
  width: 100%;
  object-fit: cover;
}

.page-about .about-figure .media-caption {
  display: block;
  padding: 10px 14px 12px;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--rock);
  border-top: 1px solid var(--line);
}

/* ---------- 场景标签页 ---------- */

.page-about .about-tabs {
  margin-top: 28px;
}

.page-about .tab-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .tab {
  appearance: none;
  -webkit-appearance: none;
  background: transparent;
  border: 1px solid var(--line);
  color: var(--rock);
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.2;
  padding: 12px 18px;
  cursor: pointer;
  clip-path: polygon(10px 0, 100% 0, 100% 100%, 0 100%, 0 10px);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-about .tab:hover {
  color: var(--fog);
  border-color: var(--rock);
}

.page-about .tab[aria-selected="true"] {
  color: var(--ink);
  background: var(--cyan);
  border-color: var(--cyan);
  font-weight: 700;
}

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

.page-about .tab-panel {
  margin-top: 18px;
  padding: 22px 18px;
  background: var(--band-c);
  border-left: 3px solid var(--cyan);
}

.page-about .tab-panel[hidden] {
  display: none;
}

.page-about .tab-panel h3 {
  margin: 0 0 10px;
  font-size: 18px;
  font-weight: 700;
  color: var(--fog);
}

.page-about .tab-panel p {
  margin: 0 0 16px;
  max-width: var(--prose-w);
  font-size: 15px;
  line-height: 1.8;
  color: #C7D4DC;
}

.page-about .about-link {
  display: inline-block;
  font-size: 14px;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 195, 0.35);
  padding-bottom: 2px;
  transition: color 0.2s var(--ease);
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--mist);
}

/* ---------- 更新节奏 ---------- */

.page-about .about-figure--wide {
  margin-top: 26px;
  background: var(--band-c);
}

.page-about .rhythm-list {
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .rhythm-item {
  background: var(--band-a);
  padding: 18px 16px;
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  gap: 12px;
}

.page-about .rhythm-item dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--orange);
  padding-top: 4px;
}

.page-about .rhythm-item dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: #C7D4DC;
}

/* ---------- 数字条 ---------- */

.page-about .stat-rail {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .stat-cell {
  background: var(--band-a);
  padding: 20px 16px 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-about .stat-num {
  font-family: var(--font-mono);
  font-size: 40px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-about .stat-cell:nth-child(even) .stat-num {
  color: var(--orange);
}

.page-about .stat-label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--rock);
}

/* ---------- 联络 ---------- */

.page-about .about-contact {
  display: grid;
  gap: 28px;
}

.page-about .about-contact__card {
  background: var(--band-b);
  border: 1px solid var(--line);
  padding: 24px 20px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
}

.page-about .about-card__label {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-about .about-card__mail {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.02em;
  color: var(--fog);
  word-break: break-all;
}

.page-about .about-card__text {
  margin: 0 0 20px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--rock);
}

/* ---------- 响应式 ---------- */

@media (min-width: 700px) {
  .page-about .about-lead {
    padding: 32px 0 68px;
  }

  .page-about .about-sec {
    padding: 68px 0;
  }

  .page-about .about-lede {
    font-size: 16px;
  }

  .page-about .about-prose p,
  .page-about .about-sub,
  .page-about .tab-panel p {
    font-size: 16px;
  }

  .page-about .about-cols {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .route-row {
    grid-template-columns: 52px minmax(0, 1fr) auto;
    align-items: center;
    gap: 24px;
    padding: 22px 0;
  }

  .page-about .route-go {
    grid-column: auto;
    justify-self: end;
  }

  .page-about .rhythm-item {
    grid-template-columns: 120px minmax(0, 1fr);
    padding: 22px 24px;
  }

  .page-about .tab-panel {
    padding: 28px 26px;
  }
}

@media (min-width: 900px) {
  .page-about .about-lead {
    padding: 36px 0 84px;
  }

  .page-about .about-lead__grid {
    grid-template-columns: minmax(0, 1.18fr) minmax(0, 0.82fr);
    align-items: end;
    gap: 56px;
  }

  .page-about .about-sec {
    padding: 84px 0;
  }

  .page-about .stat-rail {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .stat-cell {
    padding: 26px 22px 28px;
  }

  .page-about .stat-num {
    font-size: 56px;
  }

  .page-about .about-contact {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
    gap: 56px;
    align-items: start;
  }

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

  .page-about .about-figure {
    margin-top: 40px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tab,
  .page-about .about-h2::before,
  .page-about .route-go,
  .page-about .about-link {
    transition: none;
  }
}
<<<END>>>