.page-about {
  --about-rail-w: 200px;
  display: block;
  background: var(--mint);
  color: var(--night);
}

.page-about .about-mono {
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: 0.02em;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(22px, 3.5vw, 40px) 0 clamp(44px, 6vw, 88px);
  background: linear-gradient(158deg, var(--ink) 0%, var(--ink-2) 56%, #0d4438 100%);
  color: var(--sand);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -12%;
  bottom: -46%;
  width: min(620px, 78vw);
  height: min(620px, 78vw);
  background: radial-gradient(circle at 34% 34%, rgba(214, 169, 59, 0.24), rgba(30, 157, 242, 0.1) 46%, transparent 66%);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-hero__crumb {
  margin-bottom: clamp(18px, 3vw, 34px);
}

.page-about .about-hero .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 13px;
}

.page-about .about-hero .breadcrumb__item {
  color: var(--moss);
}

.page-about .about-hero .breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin-right: 6px;
  color: rgba(169, 198, 184, 0.55);
}

.page-about .about-hero .breadcrumb__item a {
  color: var(--sand);
  text-decoration: none;
  border-bottom: 1px solid rgba(214, 169, 59, 0.5);
}

.page-about .about-hero .breadcrumb__item a:hover,
.page-about .about-hero .breadcrumb__item a:focus-visible {
  color: var(--gold);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(26px, 4vw, 46px);
}

.page-about .about-hero__kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--gold);
  text-transform: uppercase;
}

.page-about h1 {
  margin: 14px 0 0;
  padding-inline-end: 0.24em;
  font-size: clamp(30px, 6.4vw, 58px);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -0.012em;
  color: var(--sand);
  transform: skewX(-3deg);
  transform-origin: left bottom;
  max-width: 17em;
}

.page-about .about-hero__lede {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  max-width: 36em;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(244, 232, 207, 0.9);
}

.page-about .about-hero__actions {
  margin-top: clamp(20px, 3vw, 30px);
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-hero__aside {
  border-top: 2px solid var(--gold);
  padding-top: 16px;
}

.page-about .about-hero__aside-label {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--moss);
}

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

.page-about .about-hero__facts li {
  display: grid;
  grid-template-columns: 2.9em minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  padding-top: 11px;
  border-top: 1px solid var(--line-light);
  font-size: 14px;
  line-height: 1.7;
  color: rgba(234, 246, 241, 0.82);
}

.page-about .about-hero__num {
  font-size: 24px;
  color: var(--gold);
  line-height: 1.1;
}

.page-about .about-hero__aside-note {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--moss);
}

/* ---------- 左轨 + 正文 ---------- */
.page-about .about-layout {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  padding-block: clamp(30px, 5vw, 70px);
}

.page-about .about-rail__legend {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--gold-ink);
}

.page-about .about-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-rail__list li {
  flex: 0 0 auto;
}

.page-about .about-rail__list a {
  display: grid;
  grid-template-columns: 2.2em minmax(0, 1fr);
  gap: 8px;
  align-items: center;
  padding: 8px 12px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.6);
  color: var(--ink);
  font-size: 13px;
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.page-about .about-rail__list a .about-mono {
  font-size: 11px;
  color: var(--gold-ink);
}

.page-about .about-rail__list a:hover,
.page-about .about-rail__list a:focus-visible {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--sand);
}

.page-about .about-rail__list a:hover .about-mono,
.page-about .about-rail__list a:focus-visible .about-mono {
  color: var(--gold);
}

/* ---------- 章节 ---------- */
.page-about .about-sec {
  position: relative;
  padding-block: clamp(26px, 4vw, 46px);
  border-top: 1px solid var(--line);
}

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

.page-about .about-sec__head {
  margin-bottom: clamp(14px, 2.4vw, 26px);
}

.page-about .about-kicker {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--gold-ink);
}

.page-about .about-sec h2 {
  margin: 0;
  max-width: 20em;
  font-size: clamp(21px, 3.4vw, 33px);
  font-weight: 800;
  line-height: 1.24;
  color: var(--ink);
}

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

.page-about .about-prose p {
  margin: 0 0 1em;
  max-width: 38em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--night);
}

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

.page-about .about-prose a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 2px solid var(--gold);
}

.page-about .about-prose a:hover,
.page-about .about-prose a:focus-visible {
  color: var(--gold-ink);
}

.page-about .about-prose--lead {
  margin-bottom: clamp(18px, 3vw, 28px);
  color: var(--ink-2);
}

.page-about .about-note {
  margin: 20px 0 0;
  padding: 14px 16px;
  background: var(--moss);
  color: var(--ink);
  border-left: 4px solid var(--gold);
  font-size: 14px;
  line-height: 1.8;
}

.page-about .about-note a {
  color: var(--ink);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 2px solid var(--ink);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  position: relative;
  display: grid;
  gap: 14px;
  padding-left: 26px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(180deg, var(--gold) 0%, var(--blue) 52%, var(--coral) 100%);
  opacity: 0.6;
}

.page-about .about-node {
  position: relative;
  background: #ffffff;
  border-left: 3px solid var(--gold);
  box-shadow: var(--shadow-1);
}

.page-about .about-node::before {
  content: "";
  position: absolute;
  left: -22px;
  top: 20px;
  width: 10px;
  height: 10px;
  background: var(--gold);
  transform: rotate(45deg);
}

.page-about .about-node__summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 12px;
  align-items: baseline;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--ink);
}

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

.page-about .about-node__summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--gold-ink);
  line-height: 1;
}

.page-about .about-node[open] .about-node__summary::after {
  content: "−";
  color: var(--blue);
}

.page-about .about-node[open] .about-node__summary {
  border-bottom: 1px solid var(--line);
}

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

.page-about .about-node__year {
  font-size: 13px;
  color: var(--gold-ink);
}

.page-about .about-node__body {
  padding: 14px 16px 16px;
}

.page-about .about-node__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-2);
  max-width: 36em;
}

.page-about .about-node__body a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 2px solid var(--gold);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 0;
}

.page-about .about-figure__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

.page-about .about-figure figcaption {
  padding-top: 10px;
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-2);
  border-top: 1px solid var(--line-gold);
  margin-top: 10px;
}

.page-about .about-figure--wide {
  margin-top: 6px;
}

.page-about .about-figure--night {
  margin-top: clamp(20px, 3vw, 32px);
  padding: 14px 14px 16px;
  background: linear-gradient(150deg, var(--ink) 0%, var(--ink-2) 70%, #12463a 100%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
}

.page-about .about-figure--night figcaption {
  color: var(--moss);
  border-top-color: var(--line-light);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
}

.page-about .about-team__body .about-prose {
  font-size: 16px;
  line-height: 1.85;
}

.page-about .about-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: clamp(16px, 2.4vw, 24px);
}

.page-about .filter-btn {
  padding: 7px 14px;
  font-size: 13px;
  font-family: var(--font-sans);
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 2px;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.page-about .filter-btn:hover {
  border-color: var(--gold);
}

.page-about .filter-btn[aria-pressed="true"] {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--sand);
}

.page-about .filter-status {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gold-ink);
}

.page-about .about-roles {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-role {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 4px 12px;
  align-items: baseline;
  padding: 14px 16px;
  background: var(--ink);
  color: var(--sand);
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
}

.page-about .about-role__no {
  font-size: 12px;
  color: var(--gold);
  grid-row: span 2;
}

.page-about .about-role__name {
  font-size: 16px;
  font-weight: 700;
}

.page-about .about-role__num {
  font-size: 13px;
  color: var(--blue);
}

.page-about .about-role__desc {
  grid-column: 2 / -1;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(234, 246, 241, 0.78);
}

.page-about .about-role.is-hidden {
  display: none;
}

.page-about .about-qc {
  margin-top: clamp(20px, 3vw, 30px);
  padding: 16px 18px;
  background: var(--mist);
  border: 1px dashed var(--line-gold);
}

.page-about .about-qc__title {
  margin: 0 0 10px;
  font-size: 15px;
  font-weight: 800;
  color: var(--ink);
}

.page-about .about-qc__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-2);
}

.page-about .about-qc__list .about-mono {
  display: inline-block;
  min-width: 3.6em;
  color: var(--gold-ink);
  font-size: 12px;
}

/* ---------- 伙伴 ---------- */
.page-about .about-partners {
  display: grid;
  gap: 12px;
}

.page-about .about-partner {
  padding: 16px 18px;
  background: #ffffff;
  border-top: 3px solid var(--blue);
  box-shadow: var(--shadow-1);
}

.page-about .about-partner__num {
  display: block;
  font-size: 30px;
  line-height: 1;
  color: var(--ink);
}

.page-about .about-partner__title {
  margin: 6px 0 8px;
  font-size: 15px;
  font-weight: 800;
  color: var(--ink);
}

.page-about .about-partner__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-2);
}

.page-about .about-honor {
  margin-top: clamp(18px, 2.6vw, 26px);
  padding: 16px 18px;
  background: var(--sand);
  border-left: 4px solid var(--coral);
}

.page-about .about-honor p {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink);
}

/* ---------- 收束 ---------- */
.page-about .about-sec--promise {
  padding: clamp(22px, 3.4vw, 36px) clamp(18px, 3vw, 30px);
  background: linear-gradient(145deg, var(--ink) 0%, var(--ink-2) 62%, #10453a 100%);
  border-top: 0;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
}

.page-about .about-sec--promise .about-kicker {
  color: var(--gold);
}

.page-about .about-sec--promise h2 {
  color: var(--sand);
}

.page-about .about-prose--onDark p {
  color: rgba(244, 232, 207, 0.88);
  font-size: 15px;
}

.page-about .about-prose--onDark a {
  color: var(--gold);
  border-bottom-color: rgba(214, 169, 59, 0.55);
}

.page-about .about-prose--onDark a:hover,
.page-about .about-prose--onDark a:focus-visible {
  color: var(--sand);
}

.page-about .about-promise__actions {
  margin-top: clamp(16px, 2.4vw, 24px);
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .about-partners {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: end;
    gap: clamp(32px, 5vw, 64px);
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: start;
  }

  .page-about .about-team__media {
    position: sticky;
    top: 96px;
  }
}

@media (min-width: 960px) {
  .page-about .about-layout {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 68px);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: 92px;
  }

  .page-about .about-rail__list {
    display: grid;
    gap: 0;
    overflow: visible;
  }

  .page-about .about-rail__list li {
    flex: initial;
  }

  .page-about .about-rail__list a {
    border: 0;
    border-top: 1px solid var(--line);
    background: transparent;
    padding: 11px 0 11px 8px;
    grid-template-columns: 2.4em minmax(0, 1fr);
    white-space: normal;
    border-left: 2px solid transparent;
  }

  .page-about .about-rail__list li:last-child a {
    border-bottom: 1px solid var(--line);
  }

  .page-about .about-rail__list a:hover,
  .page-about .about-rail__list a:focus-visible {
    background: transparent;
    color: var(--gold-ink);
    border-left-color: var(--gold);
  }

  .page-about .about-rail__list a:hover .about-mono,
  .page-about .about-rail__list a:focus-visible .about-mono {
    color: var(--gold-ink);
  }

  .page-about .about-sec h2 {
    font-size: clamp(24px, 2.6vw, 34px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-rail__list a,
  .page-about .filter-btn {
    transition: none;
  }
}
<<<END>>>