.page-about {
  --about-cut: 26px;
  --about-gap: clamp(18px, 2.4vw, 28px);
  --about-anchor: 8px;
}

/* ---------- 首屏拼贴 ---------- */
.page-about .about-hero {
  padding-top: 34px;
}

.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  align-items: end;
}

.page-about .about-hero-main {
  min-width: 0;
}

.page-about .about-h1 {
  margin: 16px 0 0;
  font-size: clamp(30px, 6.4vw, 62px);
  line-height: 1.14;
  letter-spacing: -.015em;
  font-weight: 900;
  color: var(--bone);
  max-width: 16ch;
  text-shadow: 0 .5px 0 rgba(11, 31, 26, .9);
}

.page-about .about-lede {
  margin: 20px 0 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--mute);
}

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

.page-about .about-hero-aside {
  position: relative;
  padding: 22px 22px 24px;
  background: linear-gradient(155deg, rgba(18, 48, 42, .92), rgba(11, 31, 26, .72));
  border: 1px solid var(--line-gold);
  border-radius: 4px var(--about-cut) 4px var(--about-cut);
  overflow: hidden;
}

.page-about .about-hero-aside::after {
  content: "";
  position: absolute;
  right: -40px;
  bottom: -40px;
  width: 140px;
  height: 140px;
  background: radial-gradient(circle, rgba(18, 166, 122, .22), transparent 68%);
  pointer-events: none;
}

.page-about .about-aside-title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-about .about-jump {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 2px;
}

.page-about .about-jump li + li {
  border-top: 1px solid var(--line-bone);
}

.page-about .about-jump a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 4px;
  color: var(--bone);
  text-decoration: none;
  font-size: 15px;
  line-height: 1.5;
  transition: color .25s var(--ease), transform .25s var(--ease);
}

.page-about .about-jump a:hover,
.page-about .about-jump a:focus-visible {
  color: var(--jade-lite);
  transform: translateX(4px);
}

.page-about .about-jump-idx {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--gold);
  flex: none;
}

/* ---------- 数据带 ---------- */
.page-about .about-strip {
  margin-top: 44px;
  border-top: 1px solid var(--line-gold);
  border-bottom: 1px solid var(--line-bone);
}

.page-about .about-strip .data-strip-cell {
  position: relative;
  padding: 22px 0;
}

.page-about .about-strip .data-strip-value {
  font-family: var(--font-mono);
  letter-spacing: .06em;
  color: var(--jade-lite);
  font-size: clamp(26px, 4vw, 38px);
  display: block;
  line-height: 1;
}

.page-about .about-strip .data-strip-label {
  margin-top: 10px;
  color: var(--mute);
  font-size: 13px;
  letter-spacing: .04em;
  display: block;
}

/* ---------- 通用两栏 ---------- */
.page-about .about-two-col {
  align-items: start;
}

.page-about .about-prose {
  margin-top: 6px;
}

.page-about .about-prose p {
  color: var(--mute);
}

.page-about .about-story-notes {
  display: grid;
  gap: 16px;
  margin-top: 6px;
}

.page-about .about-note {
  padding: 16px 18px;
  background: rgba(18, 48, 42, .48);
  border-left: 2px solid var(--jade);
  border-radius: 0 10px 10px 0;
}

.page-about .about-note-k {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--jade-lite);
  margin-bottom: 8px;
}

.page-about .about-note p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mute);
}

.page-about .about-story-frame,
.page-about .about-partners-media .media-frame {
  transform: rotate(-1.2deg);
}

/* ---------- 团队 ---------- */
.page-about .about-team-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  margin-top: 34px;
}

.page-about .about-team-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  align-items: start;
}

.page-about .about-team-card {
  background: linear-gradient(160deg, rgba(18, 48, 42, .78), rgba(11, 31, 26, .5));
  border: 1px solid var(--line-bone);
  border-radius: 4px 20px 4px 20px;
}

.page-about .about-team-card[data-open="true"] {
  border-color: var(--line-jade);
}

.page-about .about-team-caption {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mute);
  padding-left: 14px;
  border-left: 2px solid var(--line-gold);
}

/* ---------- 服务范围 ---------- */
.page-about .about-reach-band {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  padding: 30px 24px;
  background:
    linear-gradient(120deg, rgba(18, 166, 122, .14), transparent 58%),
    rgba(18, 48, 42, .55);
  border: 1px solid var(--line-jade);
  border-left: 4px solid var(--jade);
  border-radius: 0 var(--about-cut) var(--about-cut) 0;
}

.page-about .about-reach-figure {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
}

.page-about .about-reach-num {
  font-family: var(--font-mono);
  font-size: clamp(56px, 12vw, 104px);
  line-height: .92;
  color: var(--bone);
  letter-spacing: -.02em;
  text-shadow: 0 0 26px rgba(18, 166, 122, .35);
}

.page-about .about-reach-unit {
  font-size: 16px;
  letter-spacing: .1em;
  color: var(--jade-lite);
}

.page-about .about-reach-body h2 {
  margin-top: 12px;
}

.page-about .about-reach-body p {
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--mute);
  max-width: 66ch;
}

.page-about .about-reach-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

/* ---------- 版本时间轴 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .about-node {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 16px 16px 18px 30px;
  border-radius: 0 14px 14px 0;
  transition: background-color .3s var(--ease), transform .3s var(--ease);
}

.page-about .about-node::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--gold), rgba(217, 169, 74, .06));
}

.page-about .about-node::after {
  content: "";
  position: absolute;
  left: -5px;
  top: 20px;
  width: 10px;
  height: 10px;
  box-sizing: border-box;
  background: var(--ink);
  border: 2px solid var(--gold);
  transform: rotate(45deg);
  transition: background-color .3s var(--ease), border-color .3s var(--ease);
}

.page-about .about-node:hover,
.page-about .about-node:focus-within {
  background: linear-gradient(90deg, rgba(18, 166, 122, .14), transparent 76%);
  transform: translateX(6px);
}

.page-about .about-node:hover::after,
.page-about .about-node:focus-within::after {
  background: var(--jade);
  border-color: var(--jade-lite);
}

.page-about .about-node:hover .about-node-year,
.page-about .about-node:focus-within .about-node-year {
  color: var(--jade-lite);
}

.page-about .about-node--now::before {
  background: linear-gradient(180deg, var(--jade), rgba(18, 166, 122, .1));
}

.page-about .about-node--now::after {
  border-color: var(--jade-lite);
  background: var(--jade);
}

.page-about .about-node-year {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .18em;
  color: var(--gold);
  text-transform: uppercase;
  transition: color .3s var(--ease);
}

.page-about .about-node-body h3 {
  margin: 4px 0 0;
  font-size: 20px;
  font-weight: 800;
  color: var(--bone);
  letter-spacing: .01em;
}

.page-about .about-node-body p {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mute);
  max-width: 62ch;
}

/* ---------- 合作生态 ---------- */
.page-about .about-partner-rows {
  display: grid;
  gap: 0;
  margin-top: 26px;
}

.page-about .about-partner-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding: 18px 0;
  border-top: 1px solid var(--line-bone);
}

.page-about .about-partner-row:last-child {
  border-bottom: 1px solid var(--line-bone);
}

.page-about .about-partner-k {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--cinnabar-lite);
  text-transform: uppercase;
}

.page-about .about-partner-row p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mute);
  max-width: 64ch;
}

.page-about .about-partners-tail {
  margin: 18px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mute);
}

.page-about .about-partners-tail a {
  color: var(--jade-lite);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 认可 ---------- */
.page-about .about-award-panel {
  padding: 30px 24px 34px;
  background:
    linear-gradient(140deg, rgba(200, 56, 47, .1), transparent 62%),
    rgba(18, 48, 42, .5);
}

.page-about .about-award-panel h2 {
  margin-top: 12px;
}

.page-about .about-award-panel p {
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--mute);
}

.page-about .about-award-panel a {
  color: var(--jade-lite);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 收束 ---------- */
.page-about .about-close-bar {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  padding: 28px 24px;
  background: linear-gradient(100deg, rgba(11, 31, 26, .95), rgba(18, 48, 42, .78));
  border-top: 2px solid var(--jade);
  border-radius: 0 0 var(--about-cut) var(--about-cut);
}

.page-about .about-close-title {
  margin: 0;
  font-size: clamp(22px, 3.4vw, 30px);
  font-weight: 900;
  color: var(--bone);
}

.page-about .about-close-text p {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mute);
  max-width: 60ch;
}

.page-about .about-close-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-content: center;
}

/* ---------- 窄屏防溢出 ---------- */
.page-about .about-h1,
.page-about .section-title,
.page-about .about-close-title {
  overflow-wrap: break-word;
}

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

/* ---------- 平板 ---------- */
@media (min-width: 700px) {
  .page-about .about-strip {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0;
  }

  .page-about .about-strip .data-strip-cell + .data-strip-cell {
    border-left: 1px solid var(--line-bone);
    padding-left: 20px;
  }

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

  .page-about .about-node {
    grid-template-columns: 110px minmax(0, 1fr);
    gap: 20px;
    align-items: start;
  }

  .page-about .about-node-year {
    padding-top: 4px;
  }

  .page-about .about-partner-row {
    grid-template-columns: 130px minmax(0, 1fr);
    gap: 20px;
    align-items: start;
  }

  .page-about .about-close-bar {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    padding: 32px 30px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 980px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 7.2fr) minmax(0, 4.8fr);
    gap: 48px;
  }

  .page-about .about-hero-aside {
    transform: translateY(-14px);
  }

  .page-about .about-team-layout {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .about-team-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 14px;
  }

  .page-about .about-team-grid > .about-team-card:nth-child(2) {
    margin-left: 26px;
  }

  .page-about .about-team-grid > .about-team-card:nth-child(3) {
    margin-left: 52px;
  }

  .page-about .about-team-media {
    margin-top: 46px;
  }

  .page-about .about-reach-band {
    grid-template-columns: minmax(0, 3.4fr) minmax(0, 8.6fr);
    gap: 40px;
    align-items: center;
    padding: 40px 34px;
  }

  .page-about .about-origin-media {
    margin-top: 22px;
  }

  .page-about .about-partners-media {
    margin-top: 18px;
  }
}

/* ---------- 大屏 ---------- */
@media (min-width: 1240px) {
  .page-about .about-h1 {
    max-width: 15ch;
  }

  .page-about .about-timeline {
    gap: 4px;
  }

  .page-about .about-node {
    padding-left: 36px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-node,
  .page-about .about-jump a,
  .page-about .about-node::after,
  .page-about .about-node-year {
    transition: opacity .2s linear;
  }

  .page-about .about-node:hover,
  .page-about .about-node:focus-within,
  .page-about .about-jump a:hover,
  .page-about .about-jump a:focus-visible {
    transform: none;
  }
}