.page-about {
  --rail-w: 300px;
  --about-stack: 64px;
  position: relative;
  display: block;
  background:
    radial-gradient(760px 420px at 8% -4%, rgba(56, 240, 208, .10), transparent 62%),
    radial-gradient(680px 400px at 92% 0%, rgba(255, 106, 43, .09), transparent 60%),
    var(--deep);
  color: var(--ice);
  font-family: var(--font-body);
  line-height: 1.75;
  overflow-x: clip;
}

.page-about .about-inner {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 28px 0 44px;
  border-bottom: 1px solid var(--reef);
}

.page-about .about-crumb {
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--mist);
  margin-bottom: 26px;
}

.page-about .about-crumb a {
  color: var(--mist);
  text-decoration: none;
}

.page-about .about-crumb a:hover,
.page-about .about-crumb a:focus-visible {
  color: var(--cyan);
}

.page-about .about-crumb span[aria-current] {
  color: var(--ice);
}

.page-about .about-kicker {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-hero__title {
  margin: 0;
  max-width: 22ch;
  font-family: var(--font-display);
  font-size: clamp(28px, 6.6vw, 52px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -.02em;
  color: var(--ice);
}

.page-about .about-hero__intro {
  margin: 22px 0 0;
  max-width: 64ch;
  font-size: 16px;
  color: var(--ice);
  opacity: .86;
}

.page-about .about-hero__stats {
  margin-top: 34px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--reef);
  border: 1px solid var(--reef);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 16px;
  background: var(--midnight);
}

.page-about .about-stat__value {
  font-family: var(--font-mono);
  font-size: 24px;
  line-height: 1.1;
  font-weight: 700;
  color: var(--ice);
}

.page-about .about-stat__value.is-cyan { color: var(--cyan); }
.page-about .about-stat__value.is-orange { color: var(--orange); }

.page-about .about-stat__label {
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--mist);
}

/* ---------- 分屏骨架 ---------- */
.page-about .about-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  padding: 44px 0 80px;
}

.page-about .about-rail__label {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--mist);
}

.page-about .about-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 1px solid var(--reef);
}

.page-about .about-rail__item a {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 11px 0 11px 20px;
  text-decoration: none;
  color: var(--mist);
  transition: color .2s ease;
}

.page-about .about-rail__item a::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 50%;
  width: 7px;
  height: 7px;
  margin-top: -3.5px;
  border-radius: 50%;
  background: var(--reef);
  transition: background .2s ease, box-shadow .2s ease;
}

.page-about .about-rail__item a:hover,
.page-about .about-rail__item a:focus-visible {
  color: var(--cyan);
}

.page-about .about-rail__item a:hover::before,
.page-about .about-rail__item a:focus-visible::before {
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(56, 240, 208, .18);
}

.page-about .about-rail__yr {
  font-size: 15px;
  font-weight: 700;
  color: var(--ice);
}

.page-about .about-rail__tx {
  font-size: 13px;
}

.page-about .about-rail__note {
  margin: 16px 0 0;
  font-size: 12px;
  color: var(--mist);
}

/* ---------- 流内容 ---------- */
.page-about .about-stream {
  display: grid;
  gap: var(--about-stack);
  min-width: 0;
}

.page-about .about-section {
  display: grid;
  gap: 20px;
  min-width: 0;
}

.page-about .about-sec-head {
  display: grid;
  gap: 4px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--reef);
  position: relative;
}

.page-about .about-sec-head::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 72px;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--orange));
}

.page-about .about-sec-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(22px, 4.6vw, 34px);
  line-height: 1.2;
  letter-spacing: -.01em;
  color: var(--ice);
}

.page-about .about-lede {
  margin: 0;
  max-width: 68ch;
  font-size: 16px;
  color: var(--ice);
  opacity: .84;
}

.page-about .about-hint {
  margin: 0;
  max-width: 68ch;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .about-hint a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(56, 240, 208, .4);
}

.page-about .about-hint a:hover,
.page-about .about-hint a:focus-visible {
  border-bottom-color: var(--cyan);
}

/* ---------- 图 ---------- */
.page-about .about-figure {
  margin: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--reef);
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--midnight), var(--reef));
}

.page-about .about-figure--lead img { aspect-ratio: 7 / 4; }
.page-about .about-figure--wide img { aspect-ratio: 12 / 7; }
.page-about .about-figure--side img { aspect-ratio: 10 / 7; }

.page-about .about-figure figcaption {
  font-size: 12px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 服务对象 ---------- */
.page-about .about-aud-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .about-aud {
  position: relative;
  padding: 22px 20px 20px;
  background: var(--midnight);
  border: 1px solid var(--reef);
  border-radius: var(--radius);
  border-top: 2px solid var(--reef);
  transition: border-top-color .25s ease, transform .25s ease;
}

.page-about .about-aud:hover {
  border-top-color: var(--cyan);
  transform: translateY(-3px);
}

.page-about .about-aud__idx {
  display: inline-block;
  margin-bottom: 10px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .18em;
  color: var(--orange);
}

.page-about .about-aud h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 19px;
  line-height: 1.3;
  color: var(--ice);
}

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

/* ---------- 四块服务 ---------- */
.page-about .about-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .about-flow__step {
  position: relative;
  padding: 22px 20px;
  background: var(--midnight);
  border: 1px solid var(--reef);
  border-radius: var(--radius);
}

.page-about .about-flow__idx {
  display: block;
  margin-bottom: 10px;
  font-size: 22px;
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: .04em;
}

.page-about .about-flow__step h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 18px;
  color: var(--ice);
}

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

/* ---------- 团队 ---------- */
.page-about .about-team {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-team__row {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-areas:
    "role num"
    "bar bar";
  align-items: center;
  gap: 8px 12px;
  padding: 14px 16px;
  background: var(--midnight);
  border: 1px solid var(--reef);
  border-radius: var(--radius);
}

.page-about .about-team__role {
  grid-area: role;
  font-size: 15px;
  color: var(--ice);
}

.page-about .about-team__num {
  grid-area: num;
  font-size: 20px;
  font-weight: 700;
  color: var(--orange);
}

.page-about .about-team__bar {
  grid-area: bar;
  display: block;
  height: 8px;
  border-radius: 999px;
  background: var(--reef);
  overflow: hidden;
}

.page-about .about-team__bar > span {
  display: block;
  height: 100%;
  width: var(--w, 0%);
  border-radius: inherit;
  background: linear-gradient(90deg, var(--teal), var(--cyan));
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  display: grid;
  gap: 0;
}

.page-about .about-stage {
  position: relative;
  display: grid;
  gap: 8px;
  padding: 22px 0 22px 26px;
  border-left: 1px solid var(--reef);
  scroll-margin-top: 120px;
}

.page-about .about-stage::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 30px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--deep);
  border: 2px solid var(--reef);
  transition: border-color .25s ease, box-shadow .25s ease;
}

.page-about .about-stage:target::before {
  border-color: var(--cyan);
  box-shadow: 0 0 0 5px rgba(56, 240, 208, .16);
}

.page-about .about-stage__year {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--cyan);
}

.page-about .about-stage__body h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 18px;
  color: var(--ice);
}

.page-about .about-stage__body p {
  margin: 0;
  max-width: 62ch;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 覆盖与用户 ---------- */
.page-about .about-cover {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: center;
}

.page-about .about-cover__chart {
  padding: 22px 20px;
  background: var(--midnight);
  border: 1px solid var(--reef);
  border-radius: var(--radius);
  display: grid;
  gap: 20px;
  justify-items: center;
}

.page-about .about-donut {
  position: relative;
  width: 190px;
  max-width: 70%;
}

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

.page-about .about-donut__arc {
  transition: stroke-width .25s ease;
}

.page-about .about-donut__center {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  pointer-events: none;
}

.page-about .about-donut__num {
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--ice);
}

.page-about .about-donut__cap {
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--mist);
}

.page-about .about-legend {
  list-style: none;
  margin: 0;
  padding: 0;
  width: 100%;
  display: grid;
  gap: 10px;
}

.page-about .about-legend__item {
  display: grid;
  grid-template-columns: 12px 1fr auto;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid transparent;
  font-size: 13px;
  color: var(--mist);
  transition: background .2s ease, border-color .2s ease, color .2s ease;
}

.page-about .about-legend__item:hover {
  background: rgba(56, 240, 208, .07);
  border-color: rgba(56, 240, 208, .3);
  color: var(--ice);
}

.page-about .about-legend__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--cyan);
}

.page-about .about-legend__dot--muted { background: var(--reef); }

.page-about .about-legend__val {
  font-size: 13px;
  font-weight: 700;
  color: var(--ice);
}

.page-about .about-cover:has(.about-legend__item--key:hover) .about-donut__arc {
  stroke-width: 24;
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  background: var(--reef);
  border: 1px solid var(--reef);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-facts__cell {
  padding: 16px;
  background: var(--deep);
}

.page-about .about-facts dt {
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--mist);
  margin-bottom: 6px;
}

.page-about .about-facts dd {
  margin: 0;
  font-size: 22px;
  font-weight: 700;
  color: var(--amber);
}

/* ---------- 合作表格 ---------- */
.page-about .about-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--reef);
  border-radius: var(--radius);
  -webkit-overflow-scrolling: touch;
}

.page-about .about-table {
  width: 100%;
  min-width: 580px;
  border-collapse: collapse;
  font-size: 14px;
}

.page-about .about-table thead th {
  padding: 14px 16px;
  text-align: left;
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--cyan);
  background: var(--deep);
  border-bottom: 1px solid var(--reef);
  white-space: nowrap;
}

.page-about .about-table tbody th {
  padding: 16px;
  text-align: left;
  font-weight: 700;
  font-size: 14px;
  color: var(--ice);
  white-space: nowrap;
}

.page-about .about-table tbody td {
  padding: 16px;
  color: var(--mist);
  line-height: 1.7;
}

.page-about .about-table tbody tr:nth-child(odd) {
  background: var(--midnight);
}

.page-about .about-table tbody tr:nth-child(even) {
  background: rgba(12, 39, 69, .45);
}

.page-about .about-table tbody tr + tr th,
.page-about .about-table tbody tr + tr td {
  border-top: 1px solid var(--reef);
}

/* ---------- 认证 ---------- */
.page-about .about-cert {
  display: grid;
  gap: 14px;
  padding: 20px;
  border: 1px solid var(--reef);
  border-radius: var(--radius);
  background:
    radial-gradient(420px 200px at 0% 0%, rgba(56, 240, 208, .12), transparent 70%),
    var(--glass);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
}

.page-about .about-cert__badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  border: 1px solid rgba(56, 240, 208, .35);
  border-radius: 999px;
  width: max-content;
  max-width: 100%;
}

.page-about .about-cert__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(56, 240, 208, .18);
}

.page-about .about-cert__mark {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-about .about-cert__tx {
  margin: 0;
  max-width: 68ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ice);
  opacity: .84;
}

/* ---------- 折叠条 ---------- */
.page-about .about-acc {
  display: grid;
  gap: 10px;
}

.page-about .about-acc__item {
  background: var(--midnight);
  border: 1px solid var(--reef);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-acc__item[open] {
  border-color: rgba(56, 240, 208, .4);
}

.page-about .about-acc__item summary {
  position: relative;
  list-style: none;
  cursor: pointer;
  padding: 16px 48px 16px 18px;
  font-size: 15px;
  font-weight: 700;
  color: var(--ice);
  transition: color .2s ease;
}

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

.page-about .about-acc__item summary::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--cyan);
  transition: transform .2s ease;
}

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

.page-about .about-acc__item summary:hover,
.page-about .about-acc__item summary:focus-visible {
  color: var(--cyan);
}

.page-about .about-acc__body {
  padding: 0 18px 18px;
  border-top: 1px solid var(--reef);
}

.page-about .about-acc__body p {
  margin: 14px 0 0;
  max-width: 66ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 结尾 ---------- */
.page-about .about-cta {
  display: grid;
  gap: 16px;
  padding: 28px 22px;
  border: 1px solid var(--reef);
  border-radius: var(--radius);
  background:
    radial-gradient(500px 240px at 100% 0%, rgba(255, 106, 43, .14), transparent 68%),
    radial-gradient(420px 220px at 0% 100%, rgba(56, 240, 208, .10), transparent 70%),
    var(--midnight);
}

.page-about .about-cta h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(22px, 4.4vw, 30px);
  color: var(--ice);
}

.page-about .about-cta p {
  margin: 0;
  max-width: 66ch;
  font-size: 15px;
  color: var(--mist);
}

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

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

  .page-about .about-team__row {
    grid-template-columns: 140px 1fr 48px;
    grid-template-areas: "role bar num";
    gap: 16px;
  }

  .page-about .about-team__num { text-align: right; }

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

@media (min-width: 1000px) {
  .page-about .about-hero {
    padding: 56px 0 64px;
  }

  .page-about .about-split {
    grid-template-columns: var(--rail-w) minmax(0, 1fr);
    gap: 56px;
    padding: 72px 0 120px;
  }

  .page-about .about-rail {
    position: sticky;
    top: 96px;
    align-self: start;
    max-height: calc(100vh - 140px);
    overflow-y: auto;
  }

  .page-about .about-stream {
    --about-stack: 88px;
  }

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

  .page-about .about-flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 22px;
  }

  .page-about .about-flow__step:not(:last-child)::after {
    content: "";
    position: absolute;
    top: 50%;
    right: -22px;
    width: 22px;
    height: 1px;
    background: linear-gradient(90deg, var(--reef), var(--cyan));
    opacity: .75;
  }

  .page-about .about-cover {
    grid-template-columns: 1.05fr .95fr;
    gap: 32px;
    align-items: start;
  }

  .page-about .about-cover__chart {
    justify-items: stretch;
  }

  .page-about .about-donut {
    justify-self: center;
  }

  .page-about .about-stage {
    grid-template-columns: 92px minmax(0, 1fr);
    gap: 24px;
    align-items: start;
  }

  .page-about .about-stage__year {
    font-size: 26px;
    padding-top: 2px;
  }
}
</｜｜DSML｜｜ parameter>
</｜｜DSML｜｜ invoke>
</｜｜DSML｜｜ calls>

.page-about {
  --w: 1rem;
}