.page-about {
  background: var(--c-sea);
  color: var(--c-light);
  font-family: var(--font-sans);
  overflow-x: clip;
}

.page-about .about-crumbs {
  padding-top: 20px;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  isolation: isolate;
  padding-bottom: 40px;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -40px 0 auto 0;
  height: 460px;
  z-index: -1;
  clip-path: polygon(0 0, 100% 0, 100% 58%, 0 100%);
  background:
    linear-gradient(150deg, rgba(255, 107, 74, 0.22) 0%, rgba(255, 107, 74, 0) 58%),
    linear-gradient(170deg, var(--c-harbor) 0%, rgba(11, 30, 58, 0) 76%);
}

.page-about .about-hero__inner {
  display: grid;
  gap: 34px;
  padding-block: 30px 38px;
}

.page-about .about-hero__title {
  margin: 16px 0 0;
  font-size: clamp(32px, 7.4vw, 72px);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -0.01em;
}

.page-about .about-hero__lede {
  margin: 20px 0 0;
  max-width: 36em;
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.78;
  color: rgba(234, 240, 248, 0.84);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-hero__stats {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}

.page-about .stat-plate {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 18px 20px;
  border: 1px solid var(--c-tide);
  border-radius: var(--r-md);
  background: linear-gradient(158deg, var(--c-harbor), rgba(11, 30, 58, 0.35));
  overflow: hidden;
}

.page-about .stat-plate::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 3px;
  background: var(--c-coral);
}

.page-about .stat-plate--gold::after { background: var(--c-gold); }
.page-about .stat-plate--jade::after { background: var(--c-jade); }

.page-about .stat-plate__num {
  font-family: var(--font-mono);
  font-size: clamp(28px, 4.2vw, 40px);
  font-weight: 700;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  color: var(--c-coral);
}

.page-about .stat-plate--gold .stat-plate__num { color: var(--c-gold); }
.page-about .stat-plate--jade .stat-plate__num { color: var(--c-jade); }

.page-about .stat-plate__label {
  font-size: 14px;
  color: var(--c-mist);
}

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

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

/* ---------- 时间线 ---------- */

.page-about .about-timeline__grid {
  display: grid;
  gap: 32px;
  margin-top: 40px;
}

.page-about .tl-list {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .tl-list::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 18px;
  bottom: 40px;
  width: 2px;
  background: linear-gradient(180deg, var(--c-gold) 0%, var(--c-tide) 18%, var(--c-tide) 82%, rgba(30, 58, 99, 0) 100%);
}

.page-about .tl-node {
  position: relative;
  padding-left: 42px;
  padding-bottom: 48px;
}

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

.page-about .tl-node__dot {
  position: absolute;
  left: 0;
  top: 10px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2px solid var(--c-tide);
  background: var(--c-sea);
  transition: border-color var(--t-mid) var(--ease), box-shadow var(--t-mid) var(--ease);
}

.page-about .tl-node:target .tl-node__dot {
  border-color: var(--c-gold);
  box-shadow: 0 0 0 6px rgba(245, 194, 107, 0.14);
}

.page-about .tl-node:target .tl-node__num {
  color: var(--c-gold);
}

.page-about .tl-node__year {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 12px;
}

.page-about .tl-node__num {
  font-family: var(--font-mono);
  font-size: clamp(38px, 9vw, 66px);
  font-weight: 700;
  line-height: 0.95;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--c-tide);
  transition: color var(--t-mid) var(--ease);
}

.page-about .tl-node__note {
  margin-top: 6px;
  color: var(--c-mist);
}

.page-about .tl-node__title {
  margin: 0 0 10px;
  font-size: clamp(19px, 2.4vw, 26px);
  font-weight: 700;
  line-height: 1.36;
}

.page-about .tl-node__body p {
  margin: 0 0 12px;
  max-width: 44em;
  font-size: 16px;
  line-height: 1.78;
  color: rgba(234, 240, 248, 0.82);
}

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

.page-about .about-timeline__index {
  display: none;
}

/* ---------- 团队 ---------- */

.page-about .about-team__inner {
  display: grid;
  gap: 36px;
}

.page-about .role-list {
  display: grid;
  gap: 14px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .role-card {
  padding: 20px;
  border: 1px solid var(--c-tide);
  border-radius: var(--r-md);
  background: rgba(6, 19, 42, 0.42);
}

.page-about .role-card__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  color: var(--c-coral);
}

.page-about .role-card__title {
  margin: 12px 0 8px;
  font-size: 19px;
  font-weight: 700;
}

.page-about .role-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: rgba(234, 240, 248, 0.78);
}

.page-about .about-team__media {
  margin: 0;
  aspect-ratio: 4 / 3;
}

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

/* ---------- 合作网络 ---------- */

.page-about .about-partners__grid {
  margin-top: 36px;
}

.page-about .about-partners__grid .card__title {
  margin: 14px 0 10px;
  font-size: 20px;
  font-weight: 700;
}

.page-about .about-partners__grid p {
  margin: 0;
  font-size: 15px;
  line-height: 1.74;
  color: rgba(234, 240, 248, 0.8);
}

/* ---------- 资质荣誉 ---------- */

.page-about .about-honor__grid {
  display: grid;
  gap: 34px;
}

.page-about .honor-list {
  display: grid;
  gap: 12px;
  margin-top: 28px;
}

.page-about .honor-pill {
  border: 1px solid rgba(245, 194, 107, 0.32);
  border-radius: var(--r-lg);
  background: linear-gradient(140deg, rgba(245, 194, 107, 0.08), rgba(11, 30, 58, 0));
  transition: border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}

.page-about .honor-pill[open] {
  border-color: var(--c-gold);
  background: linear-gradient(140deg, rgba(245, 194, 107, 0.16), rgba(11, 30, 58, 0.24));
}

.page-about .honor-pill summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  cursor: pointer;
  list-style: none;
}

.page-about .honor-pill summary::-webkit-details-marker {
  display: none;
}

.page-about .honor-pill summary::before {
  content: "";
  flex: none;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--c-gold);
}

.page-about .honor-pill summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--c-gold);
}

.page-about .honor-pill[open] summary::after {
  content: "\2013";
}

.page-about .honor-pill summary:focus-visible {
  outline: 2px solid var(--c-coral);
  outline-offset: 2px;
}

.page-about .honor-pill__body {
  margin: 0;
  padding: 0 20px 18px 41px;
  font-size: 15px;
  line-height: 1.74;
  color: rgba(234, 240, 248, 0.8);
}

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

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

/* ---------- 更新机制 ---------- */

.page-about .cadence-grid {
  display: grid;
  gap: 1px;
  margin-top: 34px;
  border-radius: var(--r-lg);
  background: var(--c-tide);
  overflow: hidden;
}

.page-about .cadence-item {
  padding: 24px 22px 28px;
  background: var(--c-sea);
}

.page-about .cadence-item__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.14em;
  color: var(--c-jade);
}

.page-about .cadence-item__title {
  margin: 14px 0 10px;
  font-size: 18px;
  font-weight: 700;
}

.page-about .cadence-item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: rgba(234, 240, 248, 0.78);
}

/* ---------- 结尾引导 ---------- */

.page-about .about-cta {
  padding-bottom: 72px;
}

.page-about .about-cta__band {
  padding: 32px 24px;
  border: 1px solid var(--c-tide);
  border-radius: var(--r-lg);
  background:
    radial-gradient(130% 150% at 0% 0%, rgba(255, 107, 74, 0.2), rgba(255, 107, 74, 0) 58%),
    linear-gradient(160deg, var(--c-harbor), var(--c-sea));
}

.page-about .about-cta__title {
  margin: 14px 0 0;
  font-size: clamp(22px, 3.4vw, 34px);
  font-weight: 900;
  line-height: 1.28;
}

.page-about .about-cta__lede {
  margin: 16px 0 0;
  max-width: 40em;
  font-size: 16px;
  line-height: 1.76;
  color: rgba(234, 240, 248, 0.82);
}

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

/* ---------- 窄屏微调 ---------- */

@media (max-width: 520px) {
  .page-about .about-hero__actions .btn,
  .page-about .about-cta__actions .btn {
    flex: 1 1 100%;
    text-align: center;
  }

  .page-about .tl-node {
    padding-left: 32px;
  }

  .page-about .tl-node__year {
    gap: 10px;
  }
}

/* ---------- 中屏 ---------- */

@media (min-width: 640px) {
  .page-about .role-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

/* ---------- 桌面 ---------- */

@media (min-width: 960px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
    align-items: end;
    padding-block: 56px 64px;
  }

  .page-about .about-hero::before {
    height: 560px;
  }

  .page-about .about-team__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-honor__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    gap: 52px;
    align-items: center;
  }

  .page-about .tl-node:nth-child(even) .tl-node__body {
    margin-left: 52px;
  }

  .page-about .about-cta__shell {
    display: grid;
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }

  .page-about .about-cta__band {
    grid-column: 2 / span 10;
    padding: 44px 48px;
  }
}

/* ---------- 宽屏 ---------- */

@media (min-width: 1100px) {
  .page-about .about-timeline__grid {
    grid-template-columns: minmax(0, 1fr) 200px;
    gap: 56px;
  }

  .page-about .about-timeline__index {
    display: block;
    position: sticky;
    top: 92px;
    align-self: start;
  }

  .page-about .about-timeline__index ul {
    display: grid;
    gap: 2px;
    margin: 12px 0 0;
    padding: 0;
    list-style: none;
  }

  .page-about .about-timeline__index a {
    display: block;
    padding: 9px 12px;
    border-left: 2px solid var(--c-tide);
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--c-mist);
    text-decoration: none;
    transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
  }

  .page-about .about-timeline__index a:hover,
  .page-about .about-timeline__index a:focus-visible {
    color: var(--c-gold);
    border-left-color: var(--c-gold);
  }

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

  .page-about .about-cta__band {
    grid-column: 2 / span 8;
  }
}
<<<END>>>