.page-about {
  --about-pad-y: clamp(54px, 7.5vw, 108px);
  --about-card-pad: clamp(20px, 2.8vw, 30px);
  color: var(--text);
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  padding-top: clamp(18px, 2.6vw, 30px);
}

.page-about .breadcrumb__current {
  color: var(--muted);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(16px, 3vw, 42px) 0 clamp(44px, 7vw, 96px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--pulse) 28%, var(--kick) 64%, transparent);
  opacity: .6;
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: -34%;
  right: -26%;
  width: 86%;
  height: 168%;
  background: radial-gradient(circle at 62% 42%, rgba(198, 255, 61, .10), transparent 62%);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-hero__note {
  display: none;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .3em;
  color: var(--muted);
}

.page-about .about-hero__eyebrow {
  margin: 0 0 clamp(16px, 3.4vw, 34px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .3em;
  text-transform: uppercase;
  color: var(--pulse);
}

.page-about .about-hero__title {
  margin: 0;
  font-weight: 900;
  font-size: clamp(38px, 8.8vw, 116px);
  line-height: 1.0;
  letter-spacing: -.035em;
}

.page-about .about-hero__title-line {
  display: block;
}

.page-about .about-hero__title-line--accent {
  color: var(--pulse);
  transform: skewX(-3deg);
  transform-origin: left bottom;
  margin-top: .06em;
}

.page-about .about-hero__lede {
  margin: clamp(22px, 3.4vw, 38px) 0 0;
  max-width: 44ch;
  color: var(--muted);
  font-size: clamp(15px, 1.7vw, 18px);
  line-height: 1.8;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1px;
  margin-top: clamp(30px, 5vw, 56px);
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-hero__stats .stat {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 20px;
  background: var(--ink-800);
}

.page-about .about-hero__stats .stat__value {
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.4vw, 38px);
  font-weight: 700;
  line-height: 1;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

.page-about .about-hero__stats .stat__label {
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--muted);
}

/* ---------- 通用区块头 ---------- */
.page-about .about-section {
  padding: var(--about-pad-y) 0;
}

.page-about .about-section__head {
  max-width: 62ch;
}

.page-about .about-section__eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .3em;
  text-transform: uppercase;
  color: var(--pulse);
}

.page-about .about-section__title {
  margin: 0 0 16px;
  font-weight: 900;
  font-size: clamp(25px, 3.8vw, 42px);
  line-height: 1.14;
  letter-spacing: -.02em;
}

.page-about .about-section__lede {
  margin: 0;
  max-width: 40ch;
  color: var(--muted);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
}

.page-about .about-link {
  color: var(--pulse);
  text-decoration: none;
  border-bottom: 1px solid rgba(198, 255, 61, .45);
  transition: border-color .2s ease, color .2s ease;
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--text);
  border-bottom-color: var(--text);
}

/* ---------- 起点 ---------- */
.page-about .about-origin {
  border-top: 1px solid var(--line-soft);
}

.page-about .about-origin__grid {
  display: grid;
  gap: clamp(26px, 4vw, 56px);
}

.page-about .about-origin__lead {
  margin: 0 0 16px;
  max-width: 42ch;
  color: var(--text);
  font-size: clamp(16px, 1.7vw, 18px);
  line-height: 1.85;
}

.page-about .about-origin__text p {
  margin: 0 0 16px;
  max-width: 42ch;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.85;
}

.page-about .about-origin__facts {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-origin__facts li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 14px;
}

.page-about .about-origin__facts li span:first-child {
  color: var(--muted);
  letter-spacing: .04em;
}

.page-about .about-origin__facts li span:last-child {
  font-family: var(--font-mono);
  color: var(--text);
  text-align: right;
}

/* ---------- 版本演进 ---------- */
.page-about .about-roadmap {
  border-top: 1px solid var(--line-soft);
}

.page-about .about-roadmap__figure {
  margin: clamp(26px, 4vw, 46px) 0 clamp(30px, 5vw, 58px);
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

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

.page-about .about-roadmap__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}

.page-about .about-roadmap__index-note {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .3em;
  color: var(--muted);
}

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

.page-about .about-roadmap__year {
  display: inline-flex;
  align-items: baseline;
  gap: 9px;
  padding: 9px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--muted);
  font-size: 14px;
  text-decoration: none;
  transition: color .2s ease, border-color .2s ease, background-color .2s ease;
}

.page-about .about-roadmap__year .mono {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--text);
  font-variant-numeric: tabular-nums;
  transition: color .2s ease;
}

.page-about .about-roadmap__year:hover,
.page-about .about-roadmap__year:focus-visible {
  color: var(--pulse);
  border-color: var(--pulse);
  background: rgba(198, 255, 61, .06);
}

.page-about .about-roadmap__year:hover .mono,
.page-about .about-roadmap__year:focus-visible .mono {
  color: var(--pulse);
}

.page-about .about-roadmap__body {
  display: grid;
  gap: clamp(26px, 3.6vw, 42px);
}

.page-about .about-milestone {
  position: relative;
  padding-left: 22px;
  border-left: 1px solid var(--line);
  scroll-margin-top: 140px;
}

.page-about .about-milestone::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 6px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--pulse);
  box-shadow: 0 0 0 4px rgba(198, 255, 61, .12);
}

.page-about .about-milestone__year {
  display: inline-block;
  margin: 0 0 12px;
  padding: 4px 10px;
  border: 1px solid rgba(198, 255, 61, .45);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--pulse);
  font-variant-numeric: tabular-nums;
}

.page-about .about-milestone__title {
  margin: 0 0 12px;
  font-size: clamp(19px, 2.5vw, 27px);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -.01em;
}

.page-about .about-milestone__text {
  margin: 0;
  max-width: 46ch;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.85;
}

/* ---------- 团队 ---------- */
.page-about .about-teams {
  border-top: 1px solid var(--line-soft);
}

.page-about .about-teams__layout {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  margin-top: clamp(28px, 4vw, 50px);
}

.page-about .about-teams__figure {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

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

.page-about .about-teams__cards {
  display: grid;
  gap: clamp(16px, 2.4vw, 24px);
}

.page-about .about-team {
  position: relative;
  padding: var(--about-card-pad);
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 2px solid rgba(198, 255, 61, .55);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
  transition: border-color .25s ease, background-color .25s ease;
}

.page-about .about-team:hover,
.page-about .about-team:focus-within {
  border-color: var(--pulse);
  background: #182741;
}

.page-about .about-team__role {
  margin: 0 0 8px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .04em;
}

.page-about .about-team__size {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: clamp(30px, 4vw, 42px);
  font-weight: 700;
  line-height: 1;
  color: var(--pulse);
  font-variant-numeric: tabular-nums;
}

.page-about .about-team--b .about-team__size {
  color: var(--kick);
}

.page-about .about-team--c .about-team__size {
  color: var(--cyan);
}

.page-about .about-team__text {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.8;
}

/* ---------- 服务标准 ---------- */
.page-about .about-flow {
  border-top: 1px solid var(--line-soft);
}

.page-about .about-flow__list {
  list-style: none;
  display: grid;
  gap: 1px;
  margin: clamp(28px, 4vw, 50px) 0 0;
  padding: 0;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-flow__step {
  padding: var(--about-card-pad);
  background: var(--ink-800);
}

.page-about .about-flow__time {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--kick);
  font-variant-numeric: tabular-nums;
}

.page-about .about-flow__step:nth-child(2) .about-flow__time {
  color: var(--pulse);
}

.page-about .about-flow__step:nth-child(3) .about-flow__time {
  color: var(--cyan);
}

.page-about .about-flow__title {
  margin: 0 0 10px;
  font-size: clamp(18px, 2.2vw, 21px);
  font-weight: 800;
  line-height: 1.35;
}

.page-about .about-flow__text {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.8;
}

.page-about .about-flow__note {
  margin: 18px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--pulse);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--muted);
}

/* ---------- 资质与伙伴 ---------- */
.page-about .about-proof {
  border-top: 1px solid var(--line-soft);
}

.page-about .about-badges {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: clamp(28px, 4vw, 48px) 0 0;
  padding: 0;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-badge {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 14px;
  min-height: 152px;
  padding: var(--about-card-pad);
  background: var(--ink-900);
  transition: background-color .25s ease;
}

.page-about .about-badge:hover,
.page-about .about-badge:focus-within,
.page-about .about-badge:focus-visible {
  background: var(--ink-800);
}

.page-about .about-badge__name {
  font-size: 16px;
  font-weight: 800;
  line-height: 1.4;
  color: var(--text);
}

.page-about .about-badge__meta {
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
  opacity: .72;
  transition: opacity .25s ease, color .25s ease;
}

.page-about .about-badge:hover .about-badge__meta,
.page-about .about-badge:focus-within .about-badge__meta,
.page-about .about-badge:focus-visible .about-badge__meta {
  opacity: 1;
  color: var(--text);
}

.page-about .about-proof__tail {
  margin: clamp(22px, 3vw, 32px) 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- 甘肃 ---------- */
.page-about .about-local {
  border-top: 1px solid var(--line-soft);
}

.page-about .about-local__grid {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
}

.page-about .about-local__text p {
  margin: 0 0 16px;
  max-width: 42ch;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.85;
}

.page-about .about-local__facts {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-local__facts li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 14px;
}

.page-about .about-local__facts li span:first-child {
  color: var(--muted);
  letter-spacing: .04em;
}

.page-about .about-local__facts li span:last-child {
  font-family: var(--font-mono);
  color: var(--text);
  text-align: right;
}

.page-about .about-local__figure {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

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

/* ---------- 收束 ---------- */
.page-about .about-closing {
  padding: clamp(66px, 10vw, 148px) 0 clamp(60px, 9vw, 124px);
  border-top: 1px solid var(--line-soft);
}

.page-about .about-closing__inner {
  position: relative;
}

.page-about .about-closing__note {
  margin: 0 0 20px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .3em;
  color: var(--muted);
}

.page-about .about-closing__title {
  margin: 0;
  font-weight: 900;
  font-size: clamp(36px, 9vw, 112px);
  line-height: 1;
  letter-spacing: -.035em;
}

@supports ((background-clip: text) or (-webkit-background-clip: text)) {
  .page-about .about-closing__title {
    background-image: linear-gradient(96deg, var(--text) 32%, var(--pulse) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
  }
}

.page-about .about-closing__lede {
  margin: clamp(20px, 3vw, 30px) 0 0;
  max-width: 34ch;
  color: var(--muted);
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.8;
}

.page-about .about-closing__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(28px, 4vw, 44px);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-team--b {
    margin-left: clamp(18px, 5vw, 52px);
  }

  .page-about .about-team--c {
    margin-left: clamp(8px, 2.4vw, 26px);
  }

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

@media (min-width: 900px) {
  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-roadmap__grid {
    grid-template-columns: minmax(0, 176px) minmax(0, 1fr);
    gap: clamp(34px, 5vw, 78px);
  }

  .page-about .about-roadmap__index {
    position: sticky;
    top: 132px;
  }

  .page-about .about-roadmap__years {
    flex-direction: column;
    gap: 0;
  }

  .page-about .about-roadmap__year {
    justify-content: flex-start;
    border: none;
    border-left: 1px solid var(--line);
    border-radius: 0;
    padding: 11px 0 11px 14px;
    background: none;
  }

  .page-about .about-roadmap__year:hover,
  .page-about .about-roadmap__year:focus-visible {
    border-left-color: var(--pulse);
    background: none;
  }

  .page-about .about-local__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: center;
  }

  .page-about .about-local__figure {
    order: 2;
  }
}

@media (min-width: 960px) {
  .page-about .about-teams__layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    align-items: start;
  }

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

@media (min-width: 1000px) {
  .page-about .about-badges {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-about .about-hero__note {
    display: block;
    position: absolute;
    top: 6px;
    right: 0;
    writing-mode: vertical-rl;
    text-orientation: mixed;
  }

  .page-about .about-hero__title {
    padding-right: 60px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-team,
  .page-about .about-badge,
  .page-about .about-badge__meta,
  .page-about .about-roadmap__year,
  .page-about .about-roadmap__year .mono,
  .page-about .about-link {
    transition: none;
  }

  .page-about .about-hero__title-line--accent {
    transform: none;
  }
}