.page-about {
  --about-gap: 16px;
  --about-radius: var(--radius-md);
  --about-panel: rgba(20, 50, 74, .55);
  --about-cut: 22px;
}

/* 面包屑局部节奏 */
.page-about .breadcrumb {
  padding-top: 20px;
}

.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--c-muted);
}

.page-about .breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--c-turf);
}

.page-about .breadcrumb a {
  color: var(--c-muted);
  text-decoration: none;
}

.page-about .breadcrumb a:hover {
  color: var(--c-cyan);
}

.page-about .breadcrumb li[aria-current] {
  color: var(--c-ink);
}

/* 首屏斜切 */
.page-about .about-hero {
  position: relative;
  margin-top: 18px;
  padding: 34px 0 58px;
  background:
    radial-gradient(130% 96% at 92% 0%, rgba(59, 224, 200, .14), transparent 58%),
    radial-gradient(80% 70% at 4% 100%, rgba(15, 58, 44, .85), transparent 62%),
    linear-gradient(154deg, var(--c-grass) 0%, var(--c-navy) 58%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--about-cut)), 0 100%);
}

.page-about .about-hero__inner {
  display: grid;
  gap: 30px;
}

.page-about .about-hero__copy {
  max-width: 620px;
}

.page-about .about-hero .h-display {
  margin: 12px 0 0;
  max-width: 16em;
}

.page-about .about-hero__lede {
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--c-muted);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-about .about-hero__strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 14px;
  margin: 28px 0 0;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.page-about .about-hero__strip dt {
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--c-muted);
}

.page-about .about-hero__strip dd {
  margin: 6px 0 0;
  color: var(--c-cyan);
  line-height: 1;
}

.page-about .about-hero__strip > div:nth-child(2) dd {
  color: var(--c-orange);
}

.page-about .about-hero__strip > div:nth-child(3) dd {
  color: var(--c-ink);
}

.page-about .about-hero__unit {
  font-family: var(--font-num);
  font-size: 13px;
  margin-left: 4px;
  color: var(--c-muted);
}

.page-about .about-hero__media {
  margin: 0;
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--c-navy-2);
}

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

.page-about .about-hero__cap {
  margin: 0;
  padding: 10px 14px;
  color: var(--c-muted);
  border-top: 1px solid var(--line-soft);
}

/* 定位与起点 */
.page-about .about-scope__head {
  margin-bottom: 22px;
}

.page-about .about-scope__grid {
  display: grid;
  gap: 22px;
}

.page-about .about-scope__main p {
  margin: 0 0 16px;
}

.page-about .about-scope__side {
  padding: 20px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--c-orange);
  border-radius: var(--radius-sm);
  background: var(--about-panel);
}

.page-about .about-scope__side .h-card {
  margin: 0 0 12px;
}

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

.page-about .about-scope__bounds li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-ink);
}

.page-about .about-scope__bounds li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 8px;
  transform: rotate(45deg);
  background: var(--c-cyan);
}

.page-about .about-scope__side .note {
  margin: 16px 0 0;
}

/* 三阶段轴 */
.page-about .about-stages__lede {
  margin: 10px 0 0;
  max-width: 46em;
  color: var(--c-muted);
  font-size: 15px;
  line-height: 1.75;
}

.page-about .about-stages__body {
  position: relative;
  margin-top: 26px;
}

.page-about .about-stages__bg {
  margin: 0 0 22px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line-soft);
  opacity: .62;
  background: var(--c-navy-2);
}

.page-about .phase-rail {
  list-style: none;
  margin: 0;
  padding: 4px 0 4px 28px;
  position: relative;
}

.page-about .phase-rail::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, rgba(59, 224, 200, .7), rgba(59, 224, 200, .08) 72%, transparent);
}

.page-about .phase {
  position: relative;
  padding-bottom: 20px;
}

.page-about .phase::before {
  content: "";
  position: absolute;
  left: -25px;
  top: 10px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--c-navy);
  border: 2px solid var(--c-cyan);
  box-sizing: content-box;
}

.page-about .phase.is-current::before {
  background: var(--c-orange);
  border-color: var(--c-orange);
  box-shadow: 0 0 0 5px rgba(255, 122, 41, .16);
}

.page-about .phase__tag {
  display: inline-block;
  margin-bottom: 10px;
  padding: 4px 12px;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--c-navy);
  background: var(--c-cyan);
  clip-path: polygon(7px 0, 100% 0, calc(100% - 7px) 100%, 0 100%);
}

.page-about .phase.is-current .phase__tag {
  background: var(--c-orange);
  color: #170A02;
}

.page-about .phase__card {
  padding: 18px 18px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--about-panel);
}

.page-about .phase.is-current .phase__card {
  border-color: rgba(255, 122, 41, .4);
}

.page-about .phase__card .h-card {
  margin: 0 0 10px;
}

.page-about .phase__card > p {
  margin: 0 0 14px;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--c-muted);
}

.page-about .acc__sum {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  cursor: pointer;
  font-size: 13.5px;
  color: var(--c-ink);
}

.page-about .acc__label {
  font-family: var(--font-num);
  letter-spacing: .04em;
}

.page-about .acc__state {
  flex: none;
  padding: 2px 8px;
  font-size: 11px;
  color: var(--c-cyan);
  border: 1px solid var(--line);
  border-radius: 999px;
}

.page-about .acc__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--c-muted);
}

/* 团队分工 */
.page-about .about-team__lede {
  margin: 10px 0 0;
  max-width: 44em;
  color: var(--c-muted);
  font-size: 15px;
  line-height: 1.75;
}

.page-about .about-team__grid {
  display: grid;
  gap: 14px;
  margin-top: 26px;
}

.page-about .about-team__card {
  padding: 20px;
}

.page-about .about-team__card p {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.76;
  color: var(--c-muted);
}

.page-about .about-team__card .h-card {
  margin: 0;
}

.page-about .about-team__count {
  display: block;
  font-family: var(--font-num);
  font-size: 40px;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--c-cyan);
  margin-bottom: 12px;
}

.page-about .about-team__card--lead .about-team__count {
  font-size: 56px;
  color: var(--c-orange);
}

.page-about .about-team__card--lead .note {
  margin-top: 12px;
}

/* 单场流程路径 */
.page-about .about-flow__lede {
  margin: 10px 0 0;
  max-width: 44em;
  color: var(--c-muted);
  font-size: 15px;
  line-height: 1.75;
}

.page-about .about-flow__grid {
  display: grid;
  gap: 26px;
  margin-top: 26px;
}

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

.page-about .flow-step {
  position: relative;
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 14px;
  padding-left: 14px;
  border-left: 2px solid var(--line);
}

.page-about .flow-step::before {
  content: "";
  position: absolute;
  left: -2px;
  top: 6px;
  width: 2px;
  height: 16px;
  background: var(--c-cyan);
}

.page-about .flow-step__idx {
  font-family: var(--font-num);
  font-size: 20px;
  line-height: 1.3;
  color: var(--c-orange);
}

.page-about .flow-step__body .h-card {
  margin: 0 0 8px;
}

.page-about .flow-step__body > p {
  margin: 0 0 12px;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--c-muted);
}

.page-about .about-flow__media {
  margin: 0;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--c-navy-2);
}

.page-about .about-flow__media figcaption {
  margin: 0;
  padding: 12px 16px;
  border-top: 1px solid var(--line-soft);
  color: var(--c-muted);
}

/* 校验与勘误 */
.page-about .about-check__grid {
  display: grid;
  gap: 14px;
  margin-top: 24px;
}

.page-about .about-check__item {
  padding: 20px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  background: rgba(8, 24, 43, .6);
}

.page-about .about-check__item .h-card {
  margin: 0 0 10px;
}

.page-about .about-check__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--c-muted);
}

.page-about .about-check__item--accent {
  border-color: var(--line);
  border-left: 3px solid var(--c-cyan);
  background: var(--about-panel);
}

.page-about .about-check__link {
  margin-top: 16px;
}

.page-about .about-check__foot {
  margin: 20px 0 0;
  color: var(--c-muted);
}

.page-about .about-check__foot a {
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(59, 224, 200, .4);
}

/* 口径手册 */
.page-about .about-manual {
  background: linear-gradient(120deg, rgba(15, 58, 44, .55) 0%, rgba(8, 24, 43, 0) 68%);
}

.page-about .about-manual__head {
  max-width: 52em;
}

.page-about .about-manual__lede {
  margin: 12px 0 0;
  color: var(--c-muted);
  font-size: 15px;
  line-height: 1.78;
}

.page-about .about-manual__list {
  margin-top: 24px;
  display: grid;
  gap: 10px;
}

.page-about .about-manual__list .acc__item {
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  background: rgba(20, 50, 74, .42);
}

.page-about .about-manual__list .acc__item[open] {
  border-color: var(--line);
}

.page-about .about-manual__list .acc__body {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px dashed var(--line-soft);
}

/* 在地信息与合规 */
.page-about .about-comply__grid {
  display: grid;
  gap: 22px;
}

.page-about .about-comply__main .h-section {
  margin: 10px 0 14px;
}

.page-about .about-comply__main .prose p,
.page-about .about-comply__main p.prose {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-muted);
}

.page-about .about-comply__card {
  padding: 22px;
}

.page-about .about-comply__list {
  margin: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-comply__list dt {
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--c-muted);
}

.page-about .about-comply__list dd {
  margin: 4px 0 0;
  font-size: 15px;
  line-height: 1.65;
  color: var(--c-ink);
  word-break: break-word;
}

.page-about .about-comply__card .note {
  margin: 18px 0 0;
}

.page-about .about-comply__btn {
  margin-top: 16px;
}

/* 平板与桌面 */
@media (min-width: 720px) {
  .page-about {
    --about-cut: 34px;
  }

  .page-about .about-hero {
    padding: 52px 0 78px;
  }

  .page-about .about-scope__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 3fr);
    gap: 30px;
    align-items: start;
  }

  .page-about .about-team__grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .about-team__card--lead {
    grid-column: span 3;
    grid-row: span 2;
  }

  .page-about .about-team__card--a {
    grid-column: span 3;
  }

  .page-about .about-team__card--b {
    grid-column: span 1;
  }

  .page-about .about-team__card--c {
    grid-column: span 2;
  }

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

  .page-about .about-manual__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }

  .page-about .about-comply__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 4fr);
    gap: 34px;
    align-items: start;
  }
}

@media (min-width: 1000px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 6.4fr) minmax(0, 5.6fr);
    gap: 44px;
    align-items: center;
  }

  .page-about .about-stages__body {
    display: grid;
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    gap: 38px;
    align-items: start;
  }

  .page-about .about-stages__bg {
    margin: 6px 0 0;
    position: sticky;
    top: 24px;
  }

  .page-about .phase-rail {
    padding-left: 34px;
  }

  .page-about .phase-rail::before {
    left: 11px;
  }

  .page-about .phase::before {
    left: -30px;
  }

  .page-about .about-flow__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .flow-step {
    grid-template-columns: 52px 1fr;
    padding-left: 20px;
  }

  .page-about .about-team__count {
    font-size: 46px;
  }

  .page-about .about-team__card--lead .about-team__count {
    font-size: 72px;
  }
}

@media (min-width: 1240px) {
  .page-about .about-hero__strip {
    gap: 26px;
  }

  .page-about .phase__card {
    padding: 22px 24px 16px;
  }
}
<<<END>>>