.page-about {
  --about-gap: clamp(52px, 8vw, 100px);
  --about-rule: 1px solid var(--line-soft);
  padding-bottom: clamp(44px, 7vw, 88px);
}

.page-about .breadcrumbs {
  margin: clamp(18px, 3vw, 32px) 0 clamp(16px, 2.5vw, 24px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 44px);
  padding-bottom: clamp(28px, 4vw, 44px);
  border-bottom: 1px solid var(--line);
}

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

.page-about .about-hero__title {
  margin: 10px 0 clamp(16px, 2.6vw, 24px);
  font-family: var(--font-display);
  font-size: clamp(2rem, 6.4vw, 4rem);
  font-weight: 800;
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-hero__lede {
  max-width: var(--measure);
  margin: 0 0 clamp(20px, 3vw, 30px);
  font-size: clamp(1rem, 2.2vw, 1.1rem);
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-hero__aside {
  position: relative;
  padding: clamp(20px, 3.2vw, 30px);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(160deg, rgba(22, 55, 79, 0.9), rgba(15, 42, 64, 0.9));
  overflow: hidden;
}

.page-about .about-hero__aside::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: linear-gradient(180deg, var(--gold), rgba(216, 179, 106, 0));
}

.page-about .about-hero__aside-title {
  margin: 0 0 16px;
  font-family: var(--font-serif);
  font-size: 0.86rem;
  letter-spacing: 0.12em;
  color: var(--gold);
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px 20px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-facts__num {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 3.2vw, 1.5rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-facts__label {
  display: block;
  margin-top: 4px;
  font-size: 0.78rem;
  line-height: 1.5;
  color: var(--mist);
}

.page-about .about-hero__note {
  margin: 20px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line-soft);
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 目录 ---------- */
.page-about .about-toc {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: clamp(16px, 2.6vw, 24px) 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-toc__link {
  padding: 7px 14px;
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  font-family: var(--font-serif);
  font-size: 0.86rem;
  color: var(--mist);
  text-decoration: none;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}

.page-about .about-toc__link:hover,
.page-about .about-toc__link:focus-visible {
  color: var(--paper);
  border-color: var(--gold);
  background: rgba(216, 179, 106, 0.08);
}

/* ---------- 通用章节 ---------- */
.page-about .about-section {
  padding-top: var(--about-gap);
}

.page-about .about-section__head {
  max-width: 60ch;
  margin-bottom: clamp(22px, 3.4vw, 34px);
}

.page-about .about-section__head h2 {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 3.8vw, 2.3rem);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.015em;
  color: var(--paper);
}

.page-about .about-intro {
  max-width: var(--measure);
  margin: 0 0 clamp(20px, 3vw, 28px);
  font-size: 1rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3.5vw, 36px);
  align-items: start;
}

.page-about .prose p {
  margin: 0 0 1.1em;
  font-size: clamp(1rem, 2vw, 1.05rem);
  line-height: 1.85;
  color: var(--mist);
}

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

.page-about .about-side {
  position: relative;
  padding: 4px 0 4px 18px;
  border-left: 2px solid var(--gold);
}

.page-about .about-side__title {
  margin: 0 0 8px;
  font-family: var(--font-serif);
  font-size: 0.92rem;
  letter-spacing: 0.06em;
  color: var(--gold);
}

.page-about .about-side p:last-child {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 场景 ---------- */
.page-about .about-scenes {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin: clamp(24px, 3.6vw, 32px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-scenes__item {
  padding: 20px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  background: rgba(15, 42, 64, 0.66);
  transition: border-color var(--t-mid) var(--ease), transform var(--t-mid) var(--ease);
}

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

.page-about .about-scenes__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-about .about-scenes__text {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 演进步骤 ---------- */
.page-about .about-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-steps__item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-steps__era {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--teal);
}

.page-about .about-steps__body h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 1.06rem;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-steps__body p {
  margin: 0;
  max-width: 62ch;
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 团队 tabs ---------- */
.page-about .team-tabs {
  position: relative;
}

.page-about .team-tabs__radio {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-about .team-tabs__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.page-about .team-tabs__label {
  cursor: pointer;
  padding: 9px 16px;
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  font-size: 0.86rem;
  letter-spacing: 0.04em;
  color: var(--mist);
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}

.page-about .team-tabs__label:hover {
  color: var(--paper);
  border-color: var(--line);
}

.page-about .team-tabs__panels {
  padding: clamp(20px, 3vw, 28px);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  background: linear-gradient(165deg, rgba(22, 55, 79, 0.72), rgba(8, 24, 38, 0.7));
}

.page-about .team-tabs__panel {
  display: none;
}

.page-about .team-tabs__panel-title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--paper);
}

.page-about .team-tabs__panel p {
  margin: 0;
  max-width: 68ch;
  font-size: 0.94rem;
  line-height: 1.85;
  color: var(--mist);
}

.page-about #team-tab-tech:checked ~ .team-tabs__nav label[for="team-tab-tech"],
.page-about #team-tab-care:checked ~ .team-tabs__nav label[for="team-tab-care"],
.page-about #team-tab-content:checked ~ .team-tabs__nav label[for="team-tab-content"],
.page-about #team-tab-version:checked ~ .team-tabs__nav label[for="team-tab-version"],
.page-about #team-tab-qc:checked ~ .team-tabs__nav label[for="team-tab-qc"] {
  color: var(--paper);
  border-color: var(--gold);
  background: rgba(216, 179, 106, 0.12);
}

.page-about #team-tab-tech:checked ~ .team-tabs__panels .team-tabs__panel--tech,
.page-about #team-tab-care:checked ~ .team-tabs__panels .team-tabs__panel--care,
.page-about #team-tab-content:checked ~ .team-tabs__panels .team-tabs__panel--content,
.page-about #team-tab-version:checked ~ .team-tabs__panels .team-tabs__panel--version,
.page-about #team-tab-qc:checked ~ .team-tabs__panels .team-tabs__panel--qc {
  display: block;
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: clamp(24px, 3.6vw, 34px) 0 0;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.72);
}

.page-about .about-figure .media-frame__label {
  font-family: var(--font-serif);
}

/* ---------- 运营原则 ---------- */
.page-about .about-split--reverse {
  align-items: start;
}

.page-about .about-figure--square {
  margin: 0;
}

.page-about .principles {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .principles__item {
  padding: 18px 20px;
  border-left: 2px solid rgba(216, 179, 106, 0.5);
  background: rgba(15, 42, 64, 0.45);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.page-about .principles__mark {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  color: var(--gold);
}

.page-about .principles__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--paper);
}

.page-about .principles__item p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 时间线 ---------- */
.page-about .timeline {
  position: relative;
  margin: clamp(24px, 3.6vw, 34px) 0 0;
  padding: 0 0 0 28px;
  list-style: none;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, rgba(216, 179, 106, 0.8), rgba(216, 179, 106, 0.08));
}

.page-about .timeline__item {
  position: relative;
  padding-bottom: clamp(20px, 3vw, 28px);
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 5px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--ink-800);
  border: 2px solid var(--gold);
}

.page-about .timeline__item--live::before {
  border-color: var(--cinnabar);
  background: var(--cinnabar-soft);
}

.page-about .timeline__year {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  color: var(--gold);
}

.page-about .timeline__item--live .timeline__year {
  color: var(--cinnabar);
}

.page-about .timeline__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--paper);
}

.page-about .timeline__item p {
  margin: 0;
  max-width: 64ch;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 资质 ---------- */
.page-about .about-cred {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .about-cred__card {
  padding: 22px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  background: rgba(15, 42, 64, 0.55);
}

.page-about .about-cred__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--paper);
}

.page-about .about-cred__card p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .about-cred__card--icp {
  border-color: var(--line);
  background: linear-gradient(150deg, rgba(224, 75, 63, 0.12), rgba(15, 42, 64, 0.7));
}

.page-about .about-cred__icp {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  color: var(--paper);
}

.page-about .about-cred__card .copy-btn {
  align-self: flex-start;
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 30px);
  margin-top: var(--about-gap);
  padding: clamp(24px, 4vw, 40px);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(560px 260px at 92% 8%, rgba(33, 212, 180, 0.12), transparent 70%),
    linear-gradient(160deg, rgba(22, 55, 79, 0.9), rgba(8, 24, 38, 0.92));
}

.page-about .about-cta__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3.4vw, 1.9rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-cta__text {
  margin: 0;
  max-width: 62ch;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-content: start;
}

/* ---------- 中等屏幕 ---------- */
@media (min-width: 720px) {
  .page-about .about-scenes {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .about-cred {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .about-steps__item {
    grid-template-columns: 120px minmax(0, 1fr);
    gap: 20px;
    align-items: baseline;
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1.4fr) minmax(220px, 0.9fr);
    align-items: center;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 980px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.5fr) minmax(300px, 0.8fr);
    align-items: stretch;
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 1.65fr) minmax(250px, 0.75fr);
  }

  .page-about .about-split--reverse {
    grid-template-columns: minmax(260px, 0.75fr) minmax(0, 1.65fr);
  }

  .page-about .principles {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .timeline {
    padding-left: 34px;
    column-count: 1;
  }

  .page-about .timeline__item::before {
    left: -33px;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .about-scenes__item,
  .page-about .about-toc__link,
  .page-about .team-tabs__label {
    transition: none;
  }

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