.page-about {
  --about-index-w: 220px;
  --about-gap: 24px;
  --about-pad: 24px;
}

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

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  padding: 18px 0 6px;
}

/* ---------- 首屏框景 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 26px 0 52px;
  background:
    radial-gradient(120% 110% at 6% -14%, rgba(55, 245, 210, .13), transparent 60%),
    radial-gradient(86% 96% at 100% 0%, rgba(255, 122, 47, .09), transparent 56%),
    linear-gradient(180deg, var(--panel-2) 0%, var(--ink) 76%);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan) 22%, var(--orange) 74%, transparent);
  opacity: .55;
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 34px;
  align-items: end;
}

.page-about .about-hero__lead h1 {
  margin: 12px 0 0;
  font-size: clamp(28px, 6.2vw, 46px);
  line-height: 1.16;
  letter-spacing: -.01em;
  font-weight: 700;
  color: var(--white);
  max-width: 20ch;
}

.page-about .about-hero__lead .lede {
  margin: 18px 0 0;
  max-width: 62ch;
  color: var(--text);
}

.page-about .about-hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.page-about .about-hero__stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 16px 18px;
  background: rgba(14, 42, 35, .74);
}

.page-about .about-hero__stat .num {
  display: inline-flex;
  align-items: baseline;
  gap: 2px;
  font-size: clamp(22px, 4.4vw, 30px);
  font-weight: 800;
  line-height: 1;
  color: var(--white);
  font-variant-numeric: tabular-nums;
}

.page-about .about-hero__stat:nth-child(2) .num,
.page-about .about-hero__stat:nth-child(3) .num {
  color: var(--cyan);
}

.page-about .about-hero__unit {
  font-size: .62em;
  color: var(--orange);
}

.page-about .about-hero__stat .stat__label {
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--muted);
}

/* ---------- 主体：索引 + 堆叠画板 ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  margin-top: 48px;
  padding-bottom: 72px;
}

.page-about .about-index {
  min-width: 0;
}

.page-about .about-index__title {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--cyan);
}

.page-about .about-index__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-index__item {
  min-width: 0;
}

.page-about .about-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(14, 42, 35, .5);
  color: var(--text);
  text-decoration: none;
  font-size: 13.5px;
  transition: border-color .24s var(--ease), color .24s var(--ease), background .24s var(--ease);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  border-color: var(--cyan);
  color: var(--white);
  background: rgba(55, 245, 210, .08);
}

.page-about .about-index__num {
  font-size: 12px;
  color: var(--cyan);
  letter-spacing: .06em;
}

.page-about .about-index__note {
  display: none;
  margin-top: 18px;
  padding-left: 12px;
  border-left: 1px solid var(--line);
  line-height: 1.7;
}

/* ---------- 画板 ---------- */
.page-about .about-flow {
  display: grid;
  gap: var(--about-gap);
  min-width: 0;
}

.page-about .about-panel {
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.page-about .about-panel .panel__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 16px;
  padding: 22px var(--about-pad) 16px;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-panel .panel__index {
  order: 1;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--cyan);
}

.page-about .about-panel .panel__aside {
  order: 2;
  margin-left: auto;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--muted);
}

.page-about .about-panel .panel__title {
  order: 3;
  flex: 1 1 100%;
  margin: 0;
  font-size: clamp(19px, 3.4vw, 25px);
  line-height: 1.4;
  letter-spacing: -.01em;
  font-weight: 600;
  color: var(--white);
}

.page-about .about-panel .panel__body {
  display: grid;
  gap: 18px;
  padding: 20px var(--about-pad) 26px;
}

.page-about .about-panel .panel__body > p {
  margin: 0;
  max-width: 68ch;
  line-height: 1.8;
}

.page-about .about-subhead {
  margin: 6px 0 -4px;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--muted);
}

/* ---------- 指标块 ---------- */
.page-about .about-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-metric {
  display: grid;
  gap: 4px;
  padding: 14px 16px 16px;
  background: rgba(11, 59, 52, .62);
}

.page-about .about-metric .num {
  font-size: clamp(24px, 5vw, 34px);
  font-weight: 800;
  line-height: 1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-metric:last-child .num {
  color: var(--orange);
}

.page-about .about-metric__label {
  font-size: 12.5px;
  color: var(--muted);
}

/* ---------- 栏目列表 ---------- */
.page-about .about-columns {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px dashed var(--line-soft);
}

.page-about .about-columns__item {
  display: grid;
  gap: 4px;
  padding: 13px 2px;
  border-bottom: 1px dashed var(--line-soft);
}

.page-about .about-columns__name {
  font-size: 15px;
  font-weight: 600;
  color: var(--white);
}

.page-about .about-columns__name::before {
  content: "▚ ";
  color: var(--orange);
  font-size: 12px;
}

.page-about .about-columns__desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

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

.page-about .about-team__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-areas:
    "name num"
    "bar bar";
  gap: 8px 12px;
  align-items: center;
}

.page-about .about-team__name {
  grid-area: name;
  font-size: 14.5px;
  color: var(--text);
}

.page-about .about-team__num {
  grid-area: num;
  font-size: 13px;
  color: var(--cyan);
  letter-spacing: .06em;
}

.page-about .about-team__bar {
  grid-area: bar;
  display: block;
  height: 6px;
  border-radius: 3px;
  background: rgba(31, 74, 65, .6);
  overflow: hidden;
}

.page-about .about-team__bar i {
  display: block;
  width: var(--w, 40%);
  height: 100%;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--cyan), rgba(55, 245, 210, .35));
}

.page-about .about-team__row:nth-child(2) .about-team__bar i {
  background: linear-gradient(90deg, rgba(55, 245, 210, .72), rgba(55, 245, 210, .2));
}

.page-about .about-team__row:nth-child(3) .about-team__bar i {
  background: linear-gradient(90deg, var(--orange), rgba(255, 122, 47, .28));
}

.page-about .about-team__split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  margin-top: 22px;
}

.page-about .about-team__copy {
  display: grid;
  gap: 16px;
}

.page-about .about-team__copy p {
  margin: 0;
  line-height: 1.8;
}

.page-about .about-desk {
  margin: 0;
}

/* ---------- 复核流程 ---------- */
.page-about .about-review {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
}

.page-about .about-review__copy {
  display: grid;
  gap: 18px;
  min-width: 0;
}

.page-about .about-review__copy > p {
  margin: 0;
  line-height: 1.8;
}

.page-about .about-steps {
  position: relative;
  display: grid;
  gap: 20px;
  margin: 0;
  padding: 0 0 0 22px;
  list-style: none;
}

.page-about .about-steps::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan), var(--orange) 70%, transparent);
  opacity: .6;
}

.page-about .about-steps__item {
  position: relative;
  display: grid;
  gap: 6px;
}

.page-about .about-steps__item::before {
  content: "";
  position: absolute;
  left: -22px;
  top: 5px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ink);
  border: 1px solid var(--cyan);
  box-shadow: 0 0 0 3px rgba(55, 245, 210, .12);
}

.page-about .about-steps__item:nth-child(2)::before {
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(55, 245, 210, .18);
}

.page-about .about-steps__item:nth-child(3)::before {
  border-color: var(--orange);
  box-shadow: 0 0 0 3px rgba(255, 122, 47, .18);
}

.page-about .about-steps__idx {
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--muted);
}

.page-about .about-steps__title {
  margin: 0;
  font-size: 16.5px;
  font-weight: 600;
  color: var(--white);
}

.page-about .about-steps__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-flowchart {
  margin: 0;
}

/* ---------- 合作生态 ---------- */
.page-about .about-network {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  align-items: center;
}

.page-about .about-network__chart {
  display: flex;
  justify-content: center;
  min-width: 0;
}

.page-about .about-ring {
  width: 100%;
  max-width: 330px;
  height: auto;
}

.page-about .about-ring__orbit {
  fill: none;
  stroke: var(--line);
  stroke-width: 1;
  stroke-dasharray: 3 7;
}

.page-about .about-ring__orbit--inner {
  stroke-dasharray: 1 9;
  opacity: .6;
}

.page-about .about-ring__nodes circle {
  fill: var(--cyan);
  fill-opacity: .85;
  transition: fill .2s var(--ease), fill-opacity .2s var(--ease);
}

.page-about .about-ring__nodes circle:nth-child(3n) {
  fill: var(--orange);
  fill-opacity: .8;
}

.page-about .about-ring__nodes circle:hover {
  fill: var(--white);
  fill-opacity: 1;
}

.page-about .about-ring__core {
  fill: rgba(14, 42, 35, .96);
  stroke: var(--cyan);
  stroke-width: 1;
}

.page-about .about-ring__label {
  fill: var(--white);
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: .02em;
}

.page-about .about-network__copy {
  display: grid;
  gap: 16px;
  min-width: 0;
}

.page-about .about-network__copy p {
  margin: 0;
  line-height: 1.8;
}

.page-about .about-network__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 2px;
}

/* ---------- 更新节奏与延伸入口 ---------- */
.page-about .about-next {
  margin-top: 8px;
}

.page-about .about-next .scroll-x__track {
  gap: 14px;
}

.page-about .about-next__card {
  display: grid;
  gap: 8px;
  min-width: 250px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(11, 59, 52, .55), rgba(14, 42, 35, .85));
  text-decoration: none;
  transition: border-color .24s var(--ease), transform .24s var(--ease);
}

.page-about .about-next__card:hover,
.page-about .about-next__card:focus-visible {
  border-color: var(--cyan);
  transform: translateY(-3px);
}

.page-about .about-next__k {
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--cyan);
}

.page-about .about-next__t {
  font-size: 16px;
  font-weight: 600;
  color: var(--white);
}

.page-about .about-next__d {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 媒体容器补充 ---------- */
.page-about .about-city,
.page-about .about-flowchart {
  width: 100%;
}

/* ---------- 入场显现（渐进增强） ---------- */
.page-about [data-reveal] {
  opacity: 1;
  transform: none;
}

.js .page-about [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity .5s var(--ease), transform .5s var(--ease);
}

.js .page-about [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about {
    --about-pad: 28px;
  }

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

  .page-about .about-columns__item {
    grid-template-columns: 148px minmax(0, 1fr);
    gap: 12px;
    align-items: baseline;
  }

  .page-about .about-next__card {
    min-width: 280px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 34px 0 64px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(300px, .6fr);
    gap: 48px;
  }

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

  .page-about .about-team__split {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: 32px;
    align-items: start;
  }

  .page-about .about-review {
    grid-template-columns: minmax(0, 1.15fr) minmax(260px, .85fr);
    gap: 36px;
    align-items: start;
  }

  .page-about .about-network {
    grid-template-columns: minmax(240px, .8fr) minmax(0, 1.2fr);
    gap: 40px;
  }

  .page-about .about-network__chart {
    justify-content: flex-start;
  }
}

@media (min-width: 1040px) {
  .page-about .about-layout {
    grid-template-columns: var(--about-index-w) minmax(0, 1fr);
    gap: 44px;
    margin-top: 56px;
  }

  .page-about .about-index {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }

  .page-about .about-index__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 2px;
  }

  .page-about .about-index__link {
    width: 100%;
    padding: 9px 10px;
    border-color: transparent;
    background: transparent;
    border-radius: 0;
    border-left: 1px solid var(--line);
  }

  .page-about .about-index__link:hover,
  .page-about .about-index__link:focus-visible {
    border-left-color: var(--cyan);
    background: rgba(55, 245, 210, .07);
  }

  .page-about .about-index__note {
    display: block;
  }

  .page-about .about-flow {
    gap: 32px;
  }
}

@media (min-width: 1240px) {
  .page-about {
    --about-index-w: 232px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index__link,
  .page-about .about-next__card,
  .page-about .about-ring__nodes circle {
    transition: none;
  }

  .js .page-about [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

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