.page-about {
  --about-notch: 16px;
  padding-bottom: clamp(40px, 6vw, 88px);
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-display);
  letter-spacing: -0.02em;
}

.page-about h2 {
  font-size: clamp(1.6rem, 3.4vw, 2.6rem);
  line-height: 1.24;
  margin: 0.5rem 0 1rem;
  color: var(--paper);
}

.page-about h3 {
  font-size: clamp(1.1rem, 1.8vw, 1.32rem);
  line-height: 1.4;
  margin: 0 0 0.5rem;
  color: var(--paper);
}

.page-about p {
  line-height: 1.8;
}

/* 面包屑 */
.page-about .breadcrumb {
  margin: 0 0 clamp(16px, 2.4vw, 28px);
}

/* 首屏 */
.page-about .about-hero {
  padding-top: clamp(18px, 3vw, 36px);
}

.page-about .about-hero__window {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: clamp(16px, 2.6vw, 36px);
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(14, 59, 58, 0.55), transparent 62%),
    linear-gradient(158deg, rgba(20, 24, 29, 0.96), rgba(11, 13, 16, 0.72));
  box-shadow: var(--shadow-lift);
  overflow: hidden;
}

.page-about .about-hero__window::before,
.page-about .about-hero__window::after {
  content: "";
  position: absolute;
  width: var(--about-notch);
  height: var(--about-notch);
  border-color: var(--gold);
  border-style: solid;
  opacity: 0.75;
  pointer-events: none;
}

.page-about .about-hero__window::before {
  top: 10px;
  left: 10px;
  border-width: 1px 0 0 1px;
}

.page-about .about-hero__window::after {
  right: 10px;
  bottom: 10px;
  border-width: 0 1px 1px 0;
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 40px);
  align-items: start;
}

.page-about .about-hero__figure {
  position: relative;
}

.page-about .about-hero__plate {
  margin: 10px 0 0;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--muted);
  border-top: 1px solid var(--line-soft);
  padding-top: 10px;
}

.page-about .about-hero__plate strong {
  color: var(--gold-soft);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.page-about .about-hero__text h1 {
  font-size: clamp(1.85rem, 5.4vw, 3.6rem);
  line-height: 1.16;
  font-weight: 800;
  margin: 0.4rem 0 1rem;
  color: var(--paper);
}

.page-about .about-hero__text .lede {
  max-width: 46ch;
  color: var(--paper-78);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: clamp(18px, 2.6vw, 28px) 0;
}

.page-about .about-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  padding-top: clamp(14px, 2vw, 20px);
  border-top: 1px solid var(--line-soft);
}

.page-about .about-jump a {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 7px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line);
  color: var(--paper-86);
  font-size: 13px;
  text-decoration: none;
  transition: border-color 180ms var(--ease), color 180ms var(--ease), background 180ms var(--ease);
}

.page-about .about-jump a span {
  font-size: 11px;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
}

.page-about .about-jump a:hover,
.page-about .about-jump a:focus-visible {
  border-color: var(--gold);
  color: var(--gold-soft);
  background: rgba(216, 169, 74, 0.08);
}

/* 窄幅注释带 */
.page-about .about-band {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
  font-size: 14px;
  color: var(--paper-86);
}

.page-about .about-band li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 0;
  border-bottom: 1px dashed var(--line-soft);
}

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

.page-about .about-band__num {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
  min-width: 4.4em;
}

/* 起步与定位 */
.page-about .about-origin__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 56px);
  align-items: start;
}

.page-about .about-origin__plan {
  margin: 0;
  padding: clamp(18px, 2.6vw, 28px);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  background: linear-gradient(180deg, rgba(14, 59, 58, 0.42), rgba(20, 24, 29, 0.35));
}

.page-about .about-origin__plan svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-origin__plan figcaption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
  border-top: 1px solid var(--line-soft);
  padding-top: 10px;
}

/* 服务人群 */
.page-about .about-audience__lede {
  max-width: 58ch;
  color: var(--paper-78);
}

.page-about .about-stats {
  list-style: none;
  margin: clamp(22px, 3vw, 34px) 0 clamp(24px, 3.4vw, 40px);
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-about .about-stats li {
  background: var(--ink-2);
  padding: clamp(14px, 2vw, 22px);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-stats__num {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.35rem, 2.6vw, 1.9rem);
  color: var(--gold-soft);
  font-variant-numeric: tabular-nums;
  line-height: 1.1;
}

.page-about .about-stats__label {
  font-size: 13px;
  color: var(--muted);
  letter-spacing: 0.04em;
}

.page-about .about-scenes {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(14px, 2vw, 20px);
}

.page-about .about-scene {
  position: relative;
  padding: clamp(18px, 2.4vw, 26px);
  border-radius: var(--radius-md);
  border: 1px solid var(--line-soft);
  background: linear-gradient(200deg, rgba(20, 24, 29, 0.95), rgba(14, 59, 58, 0.35));
  min-width: 0;
}

.page-about .about-scene h3 {
  margin-top: 12px;
}

.page-about .about-scene p {
  margin: 0;
  font-size: 15px;
  color: var(--paper-78);
  max-width: 42ch;
}

/* 日常运转 */
.page-about .about-ops__head {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px 40px;
  align-items: end;
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-about .about-ops__note {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper-66);
  max-width: 46ch;
}

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

.page-about .about-op {
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  background: var(--ink-2);
  overflow: hidden;
  min-width: 0;
  transition: border-color 200ms var(--ease);
}

.page-about .about-op[open] {
  border-color: var(--line);
  background: linear-gradient(180deg, rgba(14, 59, 58, 0.5), rgba(20, 24, 29, 0.95));
}

.page-about .about-op summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 12px;
  padding: clamp(14px, 2vw, 20px);
}

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

.page-about .about-op summary::after {
  content: "+";
  margin-left: auto;
  font-size: 18px;
  line-height: 1;
  color: var(--gold);
}

.page-about .about-op[open] summary::after {
  content: "−";
}

.page-about .about-op summary:focus-visible {
  outline: 2px solid var(--gold-soft);
  outline-offset: -3px;
}

.page-about .about-op__no {
  font-family: var(--font-display);
  font-size: 13px;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
}

.page-about .about-op__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--paper);
}

.page-about .about-op__hint {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--cyan);
  border: 1px solid rgba(62, 224, 208, 0.34);
  border-radius: var(--radius-pill);
  padding: 2px 10px;
}

.page-about .about-op__body {
  padding: 0 clamp(14px, 2vw, 20px) clamp(16px, 2vw, 22px);
  border-top: 1px solid var(--line-soft);
  margin-top: 2px;
}

.page-about .about-op__body p {
  margin: 12px 0 0;
  font-size: 15px;
  color: var(--paper-78);
  max-width: 60ch;
}

/* 时间轴 */
.page-about .about-timeline__head {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-bottom: clamp(18px, 2.6vw, 28px);
}

.page-about .about-timeline .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-timeline__media {
  margin-bottom: clamp(22px, 3vw, 36px);
}

.page-about .about-timeline__list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 26px;
  position: relative;
}

.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, rgba(216, 169, 74, 0.7), rgba(216, 169, 74, 0.08));
}

.page-about .about-node {
  position: relative;
  padding: 0 0 clamp(20px, 2.8vw, 30px);
}

.page-about .about-node::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 8px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  border: 1px solid var(--gold);
  background: var(--ink);
  box-shadow: 0 0 0 4px rgba(216, 169, 74, 0.08);
}

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

.page-about .about-node__year {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.2rem, 2.2vw, 1.55rem);
  color: var(--gold-soft);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

.page-about .about-node__body {
  margin-top: 6px;
  padding: clamp(14px, 2vw, 20px);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  background: rgba(20, 24, 29, 0.9);
}

.page-about .about-node__body p {
  margin: 0;
  font-size: 15px;
  color: var(--paper-78);
  max-width: 62ch;
}

/* 团队 */
.page-about .about-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3.4vw, 44px);
  align-items: start;
}

.page-about .about-team__copy .prose {
  max-width: 60ch;
}

.page-about .about-team__facts {
  list-style: none;
  margin: clamp(18px, 2.4vw, 26px) 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-team__facts li {
  background: var(--ink);
  padding: 12px 0;
  font-size: 14px;
  color: var(--paper-78);
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
}

.page-about .about-team__facts strong {
  font-family: var(--font-display);
  color: var(--gold);
  font-size: 1.05rem;
  font-variant-numeric: tabular-nums;
}

/* 改进记录 */
.page-about .about-wins {
  list-style: none;
  margin: clamp(18px, 2.6vw, 28px) 0;
  padding: 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-wins li {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-soft);
  align-items: start;
}

.page-about .about-wins__k {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--amber);
  padding-top: 4px;
}

.page-about .about-wins p {
  margin: 0;
  font-size: 15px;
  color: var(--paper-86);
}

.page-about .about-next {
  margin-top: clamp(20px, 3vw, 32px);
  padding: clamp(18px, 2.6vw, 28px);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: linear-gradient(140deg, rgba(14, 59, 58, 0.55), rgba(11, 13, 16, 0.9));
}

.page-about .about-next p {
  margin: 0 0 14px;
  font-size: 15px;
  color: var(--paper-86);
  max-width: 48ch;
}

.page-about .about-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* 筛选态 */
.page-about [data-filter-item].is-hidden {
  display: none;
}

/* 平板 */
@media (min-width: 640px) {
  .page-about .about-band {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0;
  }

  .page-about .about-band li {
    border-bottom: 0;
    border-left: 1px solid var(--line-soft);
    padding: 6px 16px;
    flex-direction: column;
    gap: 6px;
  }

  .page-about .about-band li:first-child {
    border-left: 0;
    padding-left: 0;
  }

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

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

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

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

/* 桌面 */
@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: stretch;
  }

  .page-about .about-hero__figure {
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
  }

  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .about-origin__plan {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }

  .page-about .about-timeline__head {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    gap: clamp(28px, 4vw, 56px);
  }

  .page-about .about-timeline__list {
    padding-left: 34px;
    max-width: 880px;
  }

  .page-about .about-node {
    display: grid;
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 4px 20px;
    align-items: start;
  }

  .page-about .about-node::before {
    left: -34px;
    top: 12px;
  }

  .page-about .about-node__body {
    margin-top: 0;
  }

  .page-about .about-node:nth-child(even) .about-node__body {
    margin-left: clamp(0px, 3vw, 40px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-jump a,
  .page-about .about-op {
    transition: none;
  }
}
<<<PAGE_CSS_END>>>
<<<END>>>