.page-about {
  --about-line: rgba(110, 143, 132, .42);
  --about-sheet: rgba(4, 16, 11, .5);
  padding-bottom: clamp(3rem, 8vw, 6rem);
}

.page-about .about-topbar {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem 1rem;
  align-items: center;
  justify-content: space-between;
  padding-top: 1.4rem;
}

.page-about .about-topbar__meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .16em;
  color: var(--muted);
  text-transform: uppercase;
}

/* ---------- 首屏叠层 ---------- */
.page-about .about-hero {
  display: grid;
  gap: 1.35rem;
  padding-top: 1.75rem;
}

.page-about .about-hero__sheet {
  position: relative;
  background: linear-gradient(158deg, var(--grass-panel) 0%, var(--grass-panel-2) 100%);
  border: 1px solid var(--edge);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-paper);
  padding: clamp(1.35rem, 4vw, 2.7rem);
}

.page-about .about-hero__sheet::before {
  content: "";
  position: absolute;
  inset: 10px -10px -10px 10px;
  border: 1px solid var(--edge);
  border-radius: var(--radius-lg);
  pointer-events: none;
}

.page-about .about-hero__eyebrow {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin: 0 0 1rem;
}

.page-about .about-hero h1 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 900;
  color: var(--cream);
  font-size: clamp(1.85rem, 5.4vw, 3.35rem);
  line-height: 1.16;
  letter-spacing: -.01em;
}

.page-about .about-hero__lead {
  margin: 1.1rem 0 0;
  max-width: 62ch;
  color: var(--body-text);
  font-size: clamp(1rem, 1.55vw, 1.08rem);
  line-height: 1.85;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: 1.6rem;
}

.page-about .about-hero__stack {
  display: grid;
  gap: .85rem;
}

.page-about .about-slip {
  display: flex;
  gap: .85rem;
  align-items: flex-start;
  background: var(--grass-panel-2);
  border: 1px solid var(--edge);
  border-radius: var(--radius-md);
  padding: .95rem 1.05rem;
  box-shadow: 6px 6px 0 var(--about-sheet);
}

.page-about .about-slip--cyan { border-left: 4px solid var(--neon); }
.page-about .about-slip--amber { border-left: 4px solid var(--amber); }
.page-about .about-slip--ice { border-left: 4px solid var(--ice); }

.page-about .about-slip__num {
  font-family: var(--font-mono);
  font-size: 1.45rem;
  font-weight: 700;
  line-height: 1;
  color: var(--neon);
}

.page-about .about-slip--amber .about-slip__num { color: var(--amber); }
.page-about .about-slip--ice .about-slip__num { color: var(--ice); }

.page-about .about-slip__text {
  margin: 0;
  font-size: .9rem;
  line-height: 1.72;
  color: var(--body-text);
}

/* ---------- 目录 + 正文两栏 ---------- */
.page-about .about-layout {
  display: grid;
  gap: 1.8rem;
  margin-top: clamp(2.5rem, 6vw, 4rem);
}

.page-about .about-toc {
  border-top: 1px solid var(--edge);
  padding-top: 1rem;
}

.page-about .about-toc__title {
  margin: 0 0 .7rem;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .2em;
  color: var(--muted);
  text-transform: uppercase;
}

.page-about .about-toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: .45rem;
}

.page-about .about-toc__link {
  display: block;
  padding: .45rem .72rem;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  color: var(--body-text);
  font-size: .92rem;
  text-decoration: none;
  transition: color .2s ease, border-color .2s ease, background .2s ease;
}

.page-about .about-toc__link:hover,
.page-about .about-toc__link:focus-visible {
  color: var(--neon);
  border-color: var(--edge-strong);
  background: rgba(79, 240, 208, .07);
}

.page-about .about-block {
  padding-bottom: clamp(2.2rem, 5vw, 3.4rem);
  border-bottom: 1px dashed var(--edge);
}

.page-about .about-block + .about-block {
  padding-top: clamp(2.2rem, 5vw, 3.4rem);
}

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

.page-about .about-block__grid {
  display: grid;
  gap: 1.5rem;
  margin-top: 1.4rem;
}

.page-about .about-block__text p {
  margin: 0 0 1rem;
  color: var(--body-text);
  line-height: 1.85;
}

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

.page-about .about-block__text a,
.page-about .about-block__tail a {
  color: var(--neon);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-block__tail {
  margin: 1.4rem 0 0;
  padding: 1rem 1.15rem;
  border-left: 3px solid var(--neon);
  background: rgba(79, 240, 208, .06);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--body-text);
  font-size: .95rem;
  line-height: 1.8;
}

.page-about .media-frame {
  margin: 0;
}

.page-about .media-frame__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-md);
  border: 1px solid var(--edge);
}

.page-about .media-frame__note {
  display: block;
  margin-top: .6rem;
  font-size: .8rem;
  color: var(--muted);
  line-height: 1.6;
}

/* ---------- 版本时间线 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 1.6rem 0 0;
  padding: 0 0 0 1.7rem;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: .36rem;
  top: .6rem;
  bottom: .6rem;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--orange) 0%, var(--neon) 52%, var(--ice) 100%);
}

.page-about .about-timeline__item {
  position: relative;
  margin-bottom: 1rem;
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -1.66rem;
  top: 1.25rem;
  width: .72rem;
  height: .72rem;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 122, 26, .15);
}

.page-about .about-timeline__item:nth-child(2)::before {
  background: var(--amber);
  box-shadow: 0 0 0 4px rgba(255, 194, 71, .15);
}

.page-about .about-timeline__item:nth-child(3)::before,
.page-about .about-timeline__item:nth-child(6)::before {
  background: var(--neon);
  box-shadow: 0 0 0 4px rgba(79, 240, 208, .15);
}

.page-about .about-timeline__item:nth-child(4)::before,
.page-about .about-timeline__item:nth-child(5)::before {
  background: var(--ice);
  box-shadow: 0 0 0 4px rgba(142, 216, 255, .15);
}

.page-about .about-node {
  background: var(--grass-panel);
  border: 1px solid var(--edge);
  border-radius: var(--radius-md);
  transition: border-color .25s ease, transform .25s ease;
}

.page-about .about-node:hover {
  transform: translateY(-2px);
  border-color: var(--edge-strong);
}

.page-about .about-node[open] {
  border-color: var(--edge-strong);
}

.page-about .about-node summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  flex-wrap: wrap;
  gap: .5rem .8rem;
  align-items: baseline;
  padding: .95rem 1.05rem;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.02rem;
  color: var(--cream);
}

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

.page-about .about-node summary::after {
  content: "＋";
  margin-left: auto;
  color: var(--neon);
  font-weight: 400;
  line-height: 1;
}

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

.page-about .about-node__ver {
  font-family: var(--font-mono);
  font-size: .78rem;
  color: var(--orange);
  border: 1px solid rgba(255, 122, 26, .5);
  border-radius: 999px;
  padding: .08rem .5rem;
}

.page-about .about-node__body {
  padding: 0 1.05rem 1.1rem;
  color: var(--body-text);
  font-size: .95rem;
  line-height: 1.8;
}

.page-about .about-node__body p { margin: 0 0 .7rem; }

.page-about .about-node__tags {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
  margin: 0;
}

/* ---------- 团队仪表板 ---------- */
.page-about .about-team {
  display: grid;
  gap: 1.2rem;
  margin-top: 1.5rem;
}

.page-about .about-team .media-frame { align-self: start; }

.page-about .about-team__stats {
  display: grid;
  gap: 1rem;
}

.page-about .about-team .card {
  padding: 1.1rem 1.15rem;
}

.page-about .about-team .stat {
  margin: .5rem 0 .55rem;
  display: flex;
  align-items: baseline;
  gap: .35rem;
}

.page-about .about-team .stat__value {
  font-family: var(--font-mono);
  font-size: 2.1rem;
  font-weight: 700;
  line-height: 1;
  color: var(--neon);
}

.page-about .about-team .stat__value--amber { color: var(--amber); }

.page-about .about-team .stat__label {
  font-size: .85rem;
  color: var(--muted);
}

.page-about .about-team .card__body {
  margin: 0;
  font-size: .92rem;
  line-height: 1.75;
  color: var(--body-text);
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners {
  display: grid;
  gap: 1.4rem;
  margin-top: 1.5rem;
}

.page-about .about-cloud {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
  align-content: flex-start;
}

.page-about .about-cloud__item {
  display: inline-flex;
  align-items: baseline;
  gap: .45rem;
  padding: .5rem .85rem;
  border: 1px solid var(--edge);
  border-radius: 999px;
  background: var(--grass-panel-2);
  color: var(--body-text);
  font-size: .88rem;
  line-height: 1.4;
}

.page-about .about-cloud__item--lg {
  font-size: .98rem;
  color: var(--cream);
  border-color: var(--edge-strong);
  font-family: var(--font-head);
  font-weight: 700;
}

.page-about .about-cloud__item--amber { border-color: rgba(255, 194, 71, .55); }
.page-about .about-cloud__item--ice { border-color: rgba(142, 216, 255, .55); }

.page-about .about-cloud__item .num {
  font-family: var(--font-mono);
  color: var(--neon);
}

.page-about .about-cloud__item--amber .num { color: var(--amber); }
.page-about .about-cloud__item--ice .num { color: var(--ice); }

.page-about .about-honors {
  display: grid;
  gap: 1rem;
  margin-top: 1.4rem;
}

.page-about .about-honors .card {
  padding: 1.15rem 1.2rem;
}

.page-about .about-honors .card__title {
  margin: .45rem 0 .5rem;
  font-family: var(--font-head);
  font-size: 1.06rem;
  font-weight: 700;
}

.page-about .about-honors .card__body {
  margin: 0;
  font-size: .93rem;
  line-height: 1.75;
}

/* ---------- 数据仪表板 ---------- */
.page-about .about-meters {
  display: grid;
  gap: 1rem;
  margin-top: 1.5rem;
}

.page-about .about-meter {
  background: var(--grass-panel-2);
  border: 1px solid var(--edge);
  border-radius: var(--radius-md);
  padding: 1.05rem 1.15rem;
  transition: transform .25s ease, border-color .25s ease;
}

.page-about .about-meter:hover {
  transform: translateY(-3px);
  border-color: var(--edge-strong);
}

.page-about .about-meter__head {
  display: flex;
  align-items: baseline;
  gap: .4rem;
}

.page-about .about-meter__value {
  font-family: var(--font-mono);
  font-size: 2.05rem;
  font-weight: 700;
  line-height: 1;
  color: var(--neon);
}

.page-about .about-meter--orange .about-meter__value { color: var(--orange); }
.page-about .about-meter--amber .about-meter__value { color: var(--amber); }
.page-about .about-meter--ice .about-meter__value { color: var(--ice); }

.page-about .about-meter__unit {
  font-size: .85rem;
  color: var(--muted);
}

.page-about .about-meter__label {
  margin: .6rem 0 .5rem;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: .98rem;
  color: var(--cream);
}

.page-about .about-meter__note {
  margin: 0;
  font-size: .88rem;
  line-height: 1.72;
  color: var(--body-text);
}

/* ---------- 联系 ---------- */
.page-about .about-contact__grid {
  display: grid;
  gap: 1rem;
  margin-top: 1.5rem;
}

.page-about .about-contact__grid .card {
  display: flex;
  flex-direction: column;
  gap: .6rem;
  padding: 1.15rem;
}

.page-about .about-contact__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .95rem;
  line-height: 1.65;
  color: var(--cream);
  word-break: break-word;
}

.page-about .about-contact__grid .copy-btn { align-self: flex-start; }

.page-about .about-contact__note {
  margin: 1.2rem 0 0;
  font-size: .85rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-contact__cta { margin: 1.4rem 0 0; }

/* ---------- 断点 ---------- */
@media (min-width: 620px) {
  .page-about .about-team__stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .page-about .about-team__support { grid-column: 1 / -1; }
  .page-about .about-honors { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 880px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, .75fr);
    align-items: start;
    gap: 1.75rem;
  }
  .page-about .about-block__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: start;
    gap: 2rem;
  }
  .page-about .about-team {
    grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr);
    align-items: start;
    gap: 2rem;
  }
  .page-about .about-partners {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    align-items: start;
    gap: 2rem;
  }
  .page-about .about-contact__grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (min-width: 1020px) {
  .page-about .about-layout {
    grid-template-columns: 220px minmax(0, 1fr);
    align-items: start;
    gap: 2.75rem;
  }
  .page-about .about-toc {
    border-top: 0;
    padding-top: 0;
  }
  .page-about .about-toc__inner { position: sticky; top: 118px; }
  .page-about .about-toc__list {
    flex-direction: column;
    gap: .15rem;
  }
  .page-about .about-meters { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 1180px) {
  .page-about .about-meters { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}
</style>
<<<PAGE_CSS_END>>>
</main>