.page-about {
  --a-soft: #45565f;
  --a-line-soft: #e3e9ee;
  display: block;
  background: var(--mist);
  color: var(--ink);
}
.page-about img { max-width: 100%; height: auto; display: block; }
.page-about [id] { scroll-margin-top: 92px; }

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 26px 0 46px;
  background:
    radial-gradient(1000px 460px at 88% -12%, rgba(18, 214, 192, .22), transparent 62%),
    radial-gradient(720px 400px at 2% 112%, rgba(255, 107, 74, .18), transparent 60%),
    linear-gradient(158deg, var(--sea-deep) 0%, var(--sea-blue) 60%, #0e3557 100%);
  color: #e9f3f5;
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(18, 214, 192, .075) 1px, transparent 1px),
    linear-gradient(90deg, rgba(18, 214, 192, .075) 1px, transparent 1px);
  background-size: 58px 58px;
  pointer-events: none;
}
.page-about .about-hero > .wrap--wide { position: relative; z-index: 1; }

.page-about .about-crumbs { margin-bottom: 26px; }
.page-about .about-crumbs ol { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; margin: 0; padding: 0; font-size: 13px; }
.page-about .about-crumbs li + li::before { content: "/"; margin-right: 8px; color: rgba(233, 243, 245, .38); }
.page-about .about-crumbs,
.page-about .about-crumbs a { color: rgba(233, 243, 245, .68); text-decoration: none; }
.page-about .about-crumbs a:hover { color: var(--signal); }
.page-about .about-crumbs [aria-current="page"] { color: #ffffff; }

.page-about .about-hero-grid { display: grid; gap: 32px; }

.page-about .about-kicker {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--signal);
}
.page-about .about-hero h1 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(27px, 6.2vw, 50px);
  line-height: 1.16;
  letter-spacing: -.02em;
  color: #ffffff;
}
.page-about .about-lead {
  margin: 0 0 26px;
  max-width: 40em;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(233, 243, 245, .82);
}
.page-about .about-hero-cta { display: flex; flex-wrap: wrap; gap: 12px; }
.page-about .about-hero .btn--ghost {
  color: #e9f3f5;
  border-color: rgba(233, 243, 245, .42);
}
.page-about .about-hero .btn--ghost:hover {
  color: var(--sea-deep);
  background: var(--shoal);
  border-color: var(--shoal);
}

.page-about .about-toc-wrap {
  padding: 18px 18px 8px;
  border: 1px solid rgba(18, 214, 192, .3);
  border-radius: var(--r-m);
  background: rgba(7, 30, 49, .55);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .05);
}
.page-about .about-toc-wrap .label { color: var(--shoal); }
.page-about .about-toc { list-style: none; margin: 10px 0 0; padding: 0; }
.page-about .about-toc li + li { border-top: 1px solid rgba(18, 214, 192, .16); }
.page-about .about-toc a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 11px 0;
  font-size: 14px;
  color: #d9eef1;
  text-decoration: none;
  transition: color .22s var(--ease), padding-left .22s var(--ease);
}
.page-about .about-toc a .mono { color: var(--signal); font-size: 12px; letter-spacing: .1em; }
.page-about .about-toc a:hover { color: var(--signal); padding-left: 8px; }

/* ---------- 通用章节 ---------- */
.page-about .about-sec { padding: 50px 0; }
.page-about .about-sec-head { max-width: 46em; margin-bottom: 30px; }
.page-about .about-sec-index {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--coral);
}
.page-about .about-sec-title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 3.6vw, 32px);
  line-height: 1.26;
  letter-spacing: -.01em;
  color: var(--sea-blue);
}
.page-about .about-sec-note {
  margin: 0;
  max-width: 40em;
  font-size: 16px;
  line-height: 1.82;
  color: var(--slate);
}

/* ---------- 01 场景 ---------- */
.page-about .about-who-head { display: grid; gap: 26px; margin-bottom: 32px; }
.page-about .about-who-media { margin: 0; }
.page-about .about-who-media img {
  width: 100%;
  aspect-ratio: 11 / 7;
  object-fit: cover;
  border-radius: var(--r-m);
}
.page-about .media-cap { display: block; margin-top: 10px; font-size: 13px; color: var(--slate); }

.page-about .about-scenes { display: grid; gap: 16px; }
.page-about .about-scene {
  position: relative;
  padding: 22px 20px 24px;
  border: 1px solid var(--line);
  border-radius: var(--r-m);
  background: var(--cream);
  box-shadow: var(--sh-1);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease);
}
.page-about .about-scene::before {
  content: "";
  position: absolute;
  top: 0;
  left: 20px;
  width: 44px;
  height: 3px;
  border-radius: 0 0 3px 3px;
  background: var(--coral);
}
.page-about .about-scene:hover {
  transform: translateY(-4px);
  border-color: var(--signal);
  box-shadow: var(--sh-2);
}
.page-about .about-scene-tag {
  margin: 6px 0 12px;
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--coral);
}
.page-about .about-scene-title {
  margin: 0 0 10px;
  font-size: 18px;
  line-height: 1.4;
  color: var(--sea-blue);
}
.page-about .about-scene-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--a-soft);
}

/* ---------- 02 维护节奏 ---------- */
.page-about .about-maintain { background: #ffffff; border-top: 1px solid var(--a-line-soft); border-bottom: 1px solid var(--a-line-soft); }
.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: 0 0 32px;
  padding: 0;
  display: grid;
  gap: 26px;
}
.page-about .about-tl-node { position: relative; padding-top: 30px; padding-left: 32px; }
.page-about .about-tl-node::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 18px;
  bottom: -26px;
  width: 2px;
  background: linear-gradient(180deg, var(--signal), var(--shoal));
}
.page-about .about-tl-node:last-child::before { display: none; }
.page-about .about-tl-dot {
  position: absolute;
  left: 0;
  top: 14px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #ffffff;
  border: 3px solid var(--signal);
  box-shadow: 0 0 0 4px rgba(18, 214, 192, .15);
}
.page-about .about-tl-card {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--r-m);
  background: var(--cream);
  box-shadow: var(--sh-1);
  transition: transform .26s var(--ease), border-color .26s var(--ease);
}
.page-about .about-tl-card:hover { transform: translateY(-3px); border-color: var(--signal); }
.page-about .about-tl-ver {
  display: inline-block;
  margin: 0 0 12px;
  padding: 4px 10px;
  border-radius: var(--r-pill);
  background: var(--shoal);
  color: var(--sea-blue);
  font-size: 11px;
  letter-spacing: .12em;
}
.page-about .about-tl-card h3 { margin: 0 0 8px; font-size: 17px; line-height: 1.4; color: var(--sea-blue); }
.page-about .about-tl-card p { margin: 0; font-size: 15px; line-height: 1.78; color: var(--a-soft); }

.page-about .about-maintain-media { margin: 0; }
.page-about .about-maintain-media img {
  width: 100%;
  aspect-ratio: 25 / 14;
  object-fit: cover;
  border-radius: var(--r-m);
  border: 1px solid var(--line);
}

/* ---------- 03 团队 ---------- */
.page-about .about-roles { display: grid; gap: 20px; }
.page-about .about-role-tabs { display: flex; flex-wrap: wrap; gap: 10px; }
.page-about .about-role-tab {
  flex: 1 1 150px;
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: var(--r-m);
  background: var(--cream);
  color: var(--sea-blue);
  font-family: inherit;
  font-size: 16px;
  font-weight: 700;
  text-align: left;
  cursor: pointer;
  transition: transform .22s var(--ease), border-color .22s var(--ease), background .22s var(--ease), color .22s var(--ease);
}
.page-about .about-role-tab:hover { transform: translateY(-2px); border-color: var(--signal); }
.page-about .about-role-tab .about-role-sub {
  font-size: 11px;
  letter-spacing: .16em;
  font-weight: 400;
  color: var(--slate);
}
.page-about .about-role-tab[aria-selected="true"] {
  background: var(--sea-blue);
  border-color: var(--sea-blue);
  color: #ffffff;
}
.page-about .about-role-tab[aria-selected="true"] .about-role-sub { color: var(--signal); }

.page-about .about-role-panels { display: grid; gap: 14px; }
.page-about .about-role-panel {
  padding: 22px 20px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--signal);
  border-radius: var(--r-m);
  background: #ffffff;
  box-shadow: var(--sh-1);
}
.page-about .about-role-title { margin: 0 0 8px; font-size: 19px; color: var(--sea-blue); }
.page-about .about-role-lead { margin: 0 0 14px; font-size: 15px; line-height: 1.7; color: var(--coral); font-weight: 600; }
.page-about .about-role-list { margin: 0; padding: 0; list-style: none; display: grid; gap: 10px; }
.page-about .about-role-list li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--a-soft);
}
.page-about .about-role-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--shoal);
  box-shadow: 0 0 0 3px rgba(184, 238, 231, .4);
}

/* ---------- 04 仪表盘 ---------- */
.page-about .about-board { display: grid; gap: 14px; }
.page-about .about-stat {
  position: relative;
  padding: 20px 18px 22px;
  border: 1px solid var(--line);
  border-radius: var(--r-m);
  background: linear-gradient(180deg, #ffffff 0%, var(--mist) 100%);
  box-shadow: var(--sh-1);
  transition: transform .22s var(--ease), border-color .22s var(--ease), box-shadow .22s var(--ease);
}
.page-about .about-stat:hover,
.page-about .about-stat:focus-within {
  transform: translateY(-3px);
  border-color: var(--signal);
  box-shadow: var(--sh-2);
  outline: none;
}
.page-about .about-stat .status-dot { position: absolute; top: 16px; right: 16px; }
.page-about .about-stat-num {
  margin: 0;
  font-size: clamp(28px, 4.6vw, 38px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: .01em;
  color: var(--sea-blue);
}
.page-about .about-stat-unit {
  margin-left: 6px;
  font-size: 14px;
  font-weight: 400;
  letter-spacing: .04em;
  color: var(--coral);
}
.page-about .about-stat-cap { margin: 12px 0 0; font-size: 14px; line-height: 1.6; color: var(--slate); }
.page-about .about-stat-tip {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--slate);
}

.page-about .about-coverage-media { margin: 30px 0 0; }
.page-about .about-coverage-media img {
  width: 100%;
  aspect-ratio: 25 / 16;
  object-fit: cover;
  border-radius: var(--r-m);
}

/* ---------- 05 承诺 ---------- */
.page-about .about-promise { padding-bottom: 64px; }
.page-about .about-stack { display: grid; gap: 16px; }
.page-about .about-slip {
  position: relative;
  padding: 22px 20px 24px;
  border: 1px solid var(--line);
  border-radius: var(--r-s);
  background: var(--cream);
  box-shadow: var(--sh-1), 0 6px 0 -2px #f4eee4, 0 6px 0 -1px var(--line);
  transition: transform .26s var(--ease), box-shadow .26s var(--ease);
}
.page-about .about-slip::after {
  content: "";
  position: absolute;
  top: 16px;
  right: 16px;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 1px dashed rgba(90, 113, 131, .42);
}
.page-about .about-slip-id { margin: 0 0 10px; font-size: 11px; letter-spacing: .16em; color: var(--sea-blue); }
.page-about .about-slip h3 { margin: 0 0 8px; font-size: 17px; color: var(--sea-blue); }
.page-about .about-slip p { margin: 0; font-size: 15px; line-height: 1.8; color: var(--a-soft); }
.page-about .about-slip:hover { transform: translateY(-3px); box-shadow: var(--sh-2), 0 8px 0 -2px #f4eee4, 0 8px 0 -1px var(--signal); }

/* ---------- 出口 ---------- */
.page-about .about-exit {
  padding: 46px 0 54px;
  background:
    radial-gradient(760px 320px at 92% 0%, rgba(18, 214, 192, .18), transparent 60%),
    var(--sea-blue);
  color: #e6f1f3;
}
.page-about .about-exit-grid { display: grid; gap: 28px; }
.page-about .about-exit-title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(20px, 3vw, 26px);
  letter-spacing: -.01em;
  color: #ffffff;
}
.page-about .about-exit-text { margin: 0; max-width: 34em; font-size: 15px; line-height: 1.8; color: rgba(230, 241, 243, .78); }
.page-about .about-exit-links { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.page-about .about-exit-links a {
  display: block;
  padding: 14px 16px;
  border: 1px solid rgba(184, 238, 231, .26);
  border-radius: var(--r-m);
  background: rgba(7, 30, 49, .38);
  text-decoration: none;
  transition: transform .24s var(--ease), border-color .24s var(--ease), background .24s var(--ease);
}
.page-about .about-exit-links a:hover {
  transform: translateX(4px);
  border-color: var(--signal);
  background: rgba(7, 30, 49, .62);
}
.page-about .about-exit-name { display: block; font-size: 16px; font-weight: 700; color: var(--signal); }
.page-about .about-exit-desc { display: block; margin-top: 5px; font-size: 13px; line-height: 1.7; color: rgba(230, 241, 243, .74); }

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .about-scenes { grid-template-columns: repeat(3, 1fr); gap: 18px; align-items: start; }
  .page-about .about-scene:nth-child(2) { margin-top: 30px; }
  .page-about .about-scene:nth-child(3) { margin-top: 12px; }
  .page-about .about-board { grid-template-columns: repeat(2, 1fr); }
  .page-about .about-stack { grid-template-columns: repeat(2, 1fr); gap: 20px; }
}

@media (min-width: 900px) {
  .page-about .about-hero { padding: 36px 0 78px; }
  .page-about .about-hero-grid { grid-template-columns: 7fr 5fr; gap: 48px; align-items: center; }
  .page-about .about-sec { padding: 84px 0; }
  .page-about .about-who-head { grid-template-columns: 7fr 5fr; gap: 44px; align-items: start; margin-bottom: 40px; }
  .page-about .about-roles { grid-template-columns: 4fr 8fr; gap: 32px; align-items: start; }
  .page-about .about-role-tabs { flex-direction: column; flex-wrap: nowrap; }
  .page-about .about-role-tab { flex: 0 0 auto; }
  .page-about .about-board { grid-template-columns: repeat(3, 1fr); gap: 18px; }

  .page-about .about-timeline { grid-template-columns: repeat(3, 1fr); gap: 24px; }
  .page-about .about-timeline::before {
    content: "";
    position: absolute;
    top: 23px;
    left: 8px;
    right: 8px;
    height: 2px;
    background: linear-gradient(90deg, var(--signal), var(--shoal) 62%, var(--line));
  }
  .page-about .about-tl-node { padding: 38px 0 0; }
  .page-about .about-tl-node::before { display: none; }
  .page-about .about-tl-dot { top: 15px; left: 0; }

  .page-about .about-exit-grid { grid-template-columns: 5fr 7fr; gap: 44px; align-items: start; }
  .page-about .about-exit-links { grid-template-columns: repeat(2, 1fr); }

  .page-about .about-slip:nth-child(odd) { transform: rotate(-.5deg); }
  .page-about .about-slip:nth-child(even) { transform: rotate(.5deg); }
  .page-about .about-slip:hover { transform: rotate(0deg) translateY(-4px); }

  .page-about .about-stat-tip {
    position: absolute;
    left: 0;
    right: 0;
    top: calc(100% + 8px);
    z-index: 5;
    margin: 0;
    padding: 10px 12px;
    border-radius: var(--r-s);
    background: var(--sea-deep);
    color: #cfe9ee;
    box-shadow: var(--sh-2);
    opacity: 0;
    transform: translateY(-6px);
    pointer-events: none;
    transition: opacity .22s var(--ease), transform .22s var(--ease);
  }
  .page-about .about-stat:hover .about-stat-tip,
  .page-about .about-stat:focus-within .about-stat-tip {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (min-width: 1180px) {
  .page-about .about-hero { padding: 42px 0 92px; }
  .page-about .about-sec { padding: 96px 0; }
  .page-about .about-who-media img { aspect-ratio: 11 / 6.4; }
}
<<<END>>>