.page-about {
  --about-sticky-top: clamp(88px, 14vh, 132px);
  --about-gap: clamp(56px, 8vw, 104px);
  background: var(--paper);
  color: var(--ink);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-block: clamp(26px, 4vw, 46px) clamp(56px, 8vw, 100px);
  background:
    radial-gradient(120% 90% at 10% 6%, rgba(31, 111, 143, .3), transparent 58%),
    radial-gradient(90% 80% at 92% 104%, rgba(201, 162, 39, .16), transparent 62%),
    var(--felt-deep);
  color: var(--paper);
  isolation: isolate;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image: repeating-linear-gradient(90deg, rgba(245, 240, 228, .045) 0 1px, transparent 1px 88px);
  pointer-events: none;
}

.page-about .about-hero .breadcrumb__link {
  color: rgba(245, 240, 228, .74);
}

.page-about .about-hero .breadcrumb__item {
  color: rgba(245, 240, 228, .55);
}

.page-about .hero-grid {
  display: grid;
  gap: clamp(32px, 5vw, 56px);
  margin-top: clamp(26px, 4vw, 46px);
}

.page-about .hero-copy .eyebrow {
  color: var(--gold);
}

.page-about .hero-title {
  margin: 16px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(38px, 6.6vw, 76px);
  line-height: 1.03;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-about .hero-lede {
  margin: 20px 0 0;
  max-width: 34em;
  font-size: clamp(15.5px, 1.4vw, 18px);
  line-height: 1.8;
  color: rgba(245, 240, 228, .82);
}

.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 24px;
  margin-top: 28px;
}

.page-about .about-hero .btn--primary {
  background: var(--paper);
  color: var(--felt-deep);
  border-color: transparent;
}

.page-about .about-hero .btn--primary:hover {
  background: var(--card);
}

.page-about .about-hero .link-quiet {
  color: rgba(245, 240, 228, .8);
  border-bottom: 1px solid rgba(245, 240, 228, .32);
  padding-bottom: 2px;
}

.page-about .about-hero .link-quiet:hover {
  color: var(--gold);
  border-bottom-color: var(--line-gold);
}

.page-about .stat-deck {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.page-about .stat-tile {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 16px 18px;
  border: 1px solid var(--line-light);
  border-radius: var(--radius-md);
  background: rgba(251, 248, 240, .06);
}

.page-about .stat-tile__num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.4vw, 32px);
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: -.01em;
  color: var(--gold);
}

.page-about .stat-tile__label {
  font-size: 12px;
  letter-spacing: .08em;
  color: rgba(245, 240, 228, .62);
}

@media (min-width: 920px) {
  .page-about .hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }

  .page-about .stat-tile:nth-child(2),
  .page-about .stat-tile:nth-child(4) {
    transform: translateY(18px);
  }
}

/* ---------- 主体骨架 ---------- */
.page-about .about-body {
  display: grid;
  gap: 26px;
  padding-block: clamp(44px, 6vw, 88px) clamp(56px, 8vw, 104px);
}

.page-about .aside-label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--moss);
}

.page-about .toc {
  display: flex;
  gap: 8px;
  margin-top: 10px;
  padding-bottom: 6px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-about .toc__link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 8px 14px;
  border: 1px solid var(--line-strong);
  border-radius: var(--pill);
  background: var(--card);
  color: var(--ink);
  font-size: 13px;
  line-height: 1.3;
  text-decoration: none;
  white-space: nowrap;
}

.page-about .toc__key {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--moss);
}

.page-about .toc__link[aria-current="true"] {
  background: var(--felt);
  border-color: var(--felt);
  color: var(--paper);
}

.page-about .toc__link[aria-current="true"] .toc__key {
  color: var(--gold);
}

.page-about .about-article {
  display: grid;
  gap: var(--about-gap);
  min-width: 0;
}

.page-about .about-section {
  scroll-margin-top: var(--about-sticky-top);
}

.page-about .sec-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(32px, 4.6vw, 52px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -.03em;
  color: rgba(14, 59, 46, .16);
}

.page-about .about-section .section-heading {
  margin: 10px 0 0;
  max-width: 22ch;
}

.page-about .sec-body {
  margin-top: clamp(18px, 2.4vw, 28px);
}

.page-about .sec-body p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.82;
  color: #2b2b26;
}

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

/* ---------- 团队模块 ---------- */
.page-about .team-module {
  display: grid;
  gap: 24px;
  margin-top: 26px;
}

.page-about .team-ring {
  margin: 0;
  max-width: 230px;
}

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

.page-about .team-ring text {
  font-family: var(--font-mono);
}

.page-about .role-grid {
  display: grid;
  gap: 10px;
}

.page-about .role-card {
  position: relative;
  padding: 16px 18px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--card);
  transition: transform .18s var(--ease), box-shadow .18s var(--ease);
}

.page-about .role-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 26px rgba(8, 37, 29, .1);
}

.page-about .role-dot {
  display: block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  margin-bottom: 10px;
}

.page-about .role-dot--felt { background: var(--felt); }
.page-about .role-dot--cyan { background: var(--cyan); }
.page-about .role-dot--violet { background: var(--violet); }
.page-about .role-dot--gold { background: var(--gold); }

.page-about .role-card__title {
  margin: 0 0 8px;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .01em;
  color: var(--ink);
}

.page-about .role-card__title em {
  font-family: var(--font-mono);
  font-style: normal;
  font-size: 12.5px;
  color: var(--moss);
  margin-left: 4px;
}

.page-about .role-card__text {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--moss);
}

@media (min-width: 560px) {
  .page-about .role-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 780px) {
  .page-about .team-module {
    grid-template-columns: 220px minmax(0, 1fr);
    align-items: center;
    gap: 32px;
  }
}

/* ---------- 图片 ---------- */
.page-about .figure {
  margin: 28px 0 0;
}

.page-about .figure__media {
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: linear-gradient(150deg, rgba(31, 111, 143, .16), rgba(91, 62, 142, .14));
}

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

.page-about .figure--tall .figure__media {
  aspect-ratio: 5 / 7;
}

.page-about .figure__caption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--moss);
}

/* ---------- 流程步骤 ---------- */
.page-about .flow {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .flow__step {
  position: relative;
  padding-left: 48px;
}

.page-about .flow__step::before {
  content: "";
  position: absolute;
  left: 17px;
  top: 38px;
  bottom: -18px;
  width: 1px;
  background: var(--line-strong);
}

.page-about .flow__step:last-child::before {
  display: none;
}

.page-about .flow__idx {
  position: absolute;
  left: 0;
  top: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--line-strong);
  background: var(--card);
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 600;
  color: var(--felt);
}

.page-about .flow__title {
  margin: 6px 0 6px;
  font-family: var(--font-body);
  font-size: 15.5px;
  font-weight: 600;
  color: var(--ink);
}

.page-about .flow__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--moss);
}

.page-about .flow-note {
  margin-top: 26px;
  padding: 16px 18px;
  border-left: 3px solid var(--cinnabar);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: rgba(176, 46, 32, .05);
  font-size: 14.5px;
  color: #2b2b26;
}

@media (min-width: 860px) {
  .page-about .flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: clamp(14px, 2vw, 26px);
  }

  .page-about .flow__step {
    padding-left: 0;
    padding-top: 54px;
  }

  .page-about .flow__step::before {
    left: 18px;
    right: calc(-1 * clamp(14px, 2vw, 26px));
    top: 18px;
    bottom: auto;
    width: auto;
    height: 1px;
    background: linear-gradient(90deg, var(--cyan), var(--violet));
  }

  .page-about .flow__step:nth-child(4)::before {
    display: none;
  }

  .page-about .flow__idx {
    top: 0;
  }

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

/* ---------- 里程碑 ---------- */
.page-about .mile-layout {
  display: grid;
  gap: 26px;
}

.page-about .mile {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .mile__item {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  gap: 16px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

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

.page-about .mile__year {
  font-family: var(--font-mono);
  font-size: 19px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--felt);
}

.page-about .mile__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
}

.page-about .mile__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--moss);
}

.page-about .mile-layout .figure {
  margin-top: 0;
}

@media (min-width: 900px) {
  .page-about .mile-layout {
    grid-template-columns: minmax(0, 1fr) 290px;
    gap: clamp(26px, 3.4vw, 48px);
    align-items: start;
  }
}

/* ---------- 收尾卡片 ---------- */
.page-about .closing-card {
  margin-top: clamp(28px, 4vw, 44px);
  padding: clamp(24px, 3.4vw, 38px);
  border-radius: var(--radius-xl);
  border: 1px solid var(--line-gold);
  background:
    radial-gradient(120% 120% at 100% 0%, rgba(31, 111, 143, .16), transparent 60%),
    var(--felt);
  color: var(--paper);
  display: grid;
  gap: 22px;
}

.page-about .closing-card__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(21px, 2.6vw, 28px);
  line-height: 1.25;
  color: var(--paper);
}

.page-about .closing-card__text {
  margin: 12px 0 0;
  max-width: 46em;
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(245, 240, 228, .76);
}

.page-about .closing-card__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 22px;
}

.page-about .closing-card .btn--primary {
  background: var(--cinnabar);
  border-color: transparent;
  color: var(--paper);
}

.page-about .closing-card .btn--primary:hover {
  background: #9a281c;
}

.page-about .closing-card .link-quiet {
  color: rgba(245, 240, 228, .8);
  border-bottom: 1px solid rgba(245, 240, 228, .28);
  padding-bottom: 2px;
  font-size: 14px;
}

.page-about .closing-card .link-quiet:hover {
  color: var(--gold);
  border-bottom-color: var(--line-gold);
}

@media (min-width: 780px) {
  .page-about .closing-card {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }

  .page-about .closing-card__actions {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
}

/* ---------- 显现 ---------- */
.page-about [data-reveal][data-reveal-state="pending"] {
  opacity: 0;
  transform: translateY(14px);
}

.page-about [data-reveal][data-reveal-state="visible"] {
  opacity: 1;
  transform: none;
  transition: opacity .5s var(--ease), transform .5s var(--ease);
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal][data-reveal-state="pending"],
  .page-about [data-reveal][data-reveal-state="visible"] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .page-about .stat-tile,
  .page-about .role-card {
    transform: none !important;
    transition: none;
  }
}

/* ---------- 桌面粘性目录 ---------- */
@media (min-width: 1000px) {
  .page-about .about-body {
    grid-template-columns: 214px minmax(0, 1fr);
    column-gap: clamp(38px, 5vw, 72px);
    align-items: start;
  }

  .page-about .about-aside {
    position: sticky;
    top: var(--about-sticky-top);
  }

  .page-about .toc {
    display: grid;
    gap: 0;
    overflow: visible;
    margin-top: 14px;
    padding-bottom: 0;
  }

  .page-about .toc__link {
    display: grid;
    grid-template-columns: 54px minmax(0, 1fr);
    align-items: baseline;
    gap: 8px;
    padding: 10px 0 10px 14px;
    border: 0;
    border-left: 2px solid var(--line);
    border-radius: 0;
    background: none;
    color: var(--moss);
    font-size: 14px;
    white-space: normal;
  }

  .page-about .toc__link:hover {
    color: var(--felt);
    border-left-color: var(--line-strong);
  }

  .page-about .toc__link[aria-current="true"] {
    background: linear-gradient(90deg, rgba(176, 46, 32, .09), transparent 84%);
    border-left-color: var(--cinnabar);
    color: var(--ink);
  }

  .page-about .toc__link[aria-current="true"] .toc__key {
    color: var(--cinnabar);
  }
}
<<<END>>>