.page-about {
  --about-rail: 190px;
  color: var(--fg);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
}

/* ---------- 封面带 ---------- */
.page-about .about-cover {
  position: relative;
  overflow: hidden;
  background: var(--navy-deep);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-cover::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  z-index: 2;
  background: linear-gradient(90deg, var(--cyan), var(--violet) 46%, var(--orange));
}

.page-about .about-cover__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-about .about-cover__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .26;
  filter: saturate(.72) contrast(1.06);
}

.page-about .about-cover__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(6, 23, 41, .58) 0%, rgba(6, 23, 41, .93) 62%, rgba(6, 23, 41, .99) 100%),
    repeating-linear-gradient(90deg, var(--grid-line) 0 1px, transparent 1px 48px),
    repeating-linear-gradient(0deg, var(--grid-line) 0 1px, transparent 1px 48px);
}

.page-about .about-cover__inner {
  position: relative;
  z-index: 1;
  padding: 68px 0 48px;
}

.page-about .about-cover h1 {
  margin: 16px 0 0;
  max-width: 15em;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 5.2vw, 60px);
  line-height: 1.08;
  letter-spacing: -.012em;
  color: var(--white);
}

.page-about .about-cover__lead {
  margin: 20px 0 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .about-facts {
  margin: 36px 0 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  clip-path: polygon(18px 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%, 0 18px);
}

.page-about .about-facts__item {
  background: rgba(6, 23, 41, .78);
  padding: 14px 16px 16px;
}

.page-about .about-facts dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--rock);
  text-transform: uppercase;
}

.page-about .about-facts dd {
  margin: 6px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 24px;
  line-height: 1.1;
  color: var(--cyan);
}

.page-about .about-facts__item:nth-child(5) dd,
.page-about .about-facts__item:nth-child(6) dd {
  color: var(--orange);
}

/* ---------- 主体布局 ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  padding-top: 48px;
  padding-bottom: 72px;
  min-width: 0;
}

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

/* ---------- 左栏章节索引 ---------- */
.page-about .about-rail {
  display: none;
}

.page-about .about-rail__cap {
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--rock);
  text-transform: uppercase;
}

.page-about .about-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-rail__list a {
  display: flex;
  align-items: baseline;
  gap: 9px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--mist);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}

.page-about .about-rail__list a::before {
  content: "";
  flex: none;
  width: 6px;
  height: 6px;
  margin-top: 4px;
  background: var(--rock);
  transform: rotate(45deg);
  transition: background var(--dur) var(--ease);
}

.page-about .about-rail__no {
  font-size: 11px;
  color: var(--rock);
}

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

.page-about .about-rail__list a:hover::before,
.page-about .about-rail__list a:focus-visible::before {
  background: var(--cyan);
}

/* ---------- 章节通用 ---------- */
.page-about .about-sec {
  padding: 40px 0 44px;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-sec:first-of-type {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-sec h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(23px, 3vw, 33px);
  line-height: 1.22;
  letter-spacing: -.01em;
  color: var(--white);
}

.page-about .about-sec__intro {
  margin: 14px 0 0;
  max-width: 66ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .about-sec .prose {
  margin-top: 20px;
}

/* ---------- 覆盖城市条 ---------- */
.page-about .city-band {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .city-band li {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  padding: 6px 13px;
  color: var(--mist);
  border: 1px solid var(--line);
  background: rgba(6, 23, 41, .5);
  clip-path: polygon(7px 0, 100% 0, 100% calc(100% - 7px), calc(100% - 7px) 100%, 0 100%, 0 7px);
}

/* ---------- 方法论：陶土色横向带 ---------- */
.page-about .about-sec--method {
  border-top: 0;
  margin: 6px 0;
  padding: 30px 18px 36px;
  border-left: 3px solid var(--clay);
  background: linear-gradient(96deg, rgba(185, 113, 79, .2) 0%, rgba(185, 113, 79, .07) 46%, rgba(185, 113, 79, 0) 100%);
}

.page-about .method-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  margin-top: 26px;
}

.page-about .method-figure {
  margin: 0;
}

.page-about .method-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: mstep;
  display: grid;
  gap: 18px;
  align-content: start;
}

.page-about .method-steps li {
  position: relative;
  padding-left: 46px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .method-steps li::before {
  counter-increment: mstep;
  content: "0" counter(mstep);
  position: absolute;
  left: 0;
  top: 1px;
  width: 30px;
  height: 24px;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--clay);
  border: 1px solid rgba(185, 113, 79, .6);
}

.page-about .method-steps strong {
  display: block;
  margin-bottom: 2px;
  font-size: 15.5px;
  font-weight: 700;
  color: var(--white);
}

.page-about .method-notes {
  margin-top: 30px;
}

/* ---------- 团队构成 ---------- */
.page-about .team-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  margin-top: 26px;
}

.page-about .team-chart {
  min-width: 0;
}

.page-about .team-bars {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .team-bars li {
  display: grid;
  gap: 8px;
}

.page-about .team-bars__top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  font-size: 15px;
  color: var(--mist);
}

.page-about .team-bars__num {
  font-size: 16px;
  font-weight: 500;
  color: var(--white);
  white-space: nowrap;
}

.page-about .team-bars__track {
  height: 10px;
  border: 1px solid var(--line-soft);
  background: rgba(60, 74, 87, .3);
  overflow: hidden;
}

.page-about .team-bars__fill {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--cyan-ink), var(--cyan));
}

.page-about .team-bars li:nth-child(1) .team-bars__fill { width: 96%; }
.page-about .team-bars li:nth-child(2) .team-bars__fill { width: 87%; }
.page-about .team-bars li:nth-child(3) .team-bars__fill { width: 64%; }
.page-about .team-bars li:nth-child(4) .team-bars__fill {
  width: 100%;
  background: linear-gradient(90deg, var(--orange-ink), var(--orange));
}

.page-about .team-chart__note {
  margin: 16px 0 0;
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--rock);
}

.page-about .team-figure {
  margin: 0;
}

/* ---------- 资质徽章 ---------- */
.page-about .badge-grid {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .badge {
  padding: 20px 20px 22px;
  background: var(--navy-deep);
  border: 1px solid var(--line);
  clip-path: polygon(17px 0, 100% 0, 100% calc(100% - 17px), calc(100% - 17px) 100%, 0 100%, 0 17px);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .badge:hover,
.page-about .badge:focus-within {
  transform: translateY(-2px);
  box-shadow: inset 0 0 0 1px var(--cyan), 0 10px 24px rgba(0, 0, 0, .34);
}

.page-about .badge__k {
  margin: 0;
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--cyan);
}

.page-about .badge h3 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  line-height: 1.3;
  color: var(--white);
}

.page-about .badge__note {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 合作伙伴 ---------- */
.page-about .partner-list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .partner {
  padding: 22px 20px 24px;
  background: rgba(6, 23, 41, .62);
  border: 1px solid var(--line-soft);
}

.page-about .partner--deliver { border-top: 3px solid var(--orange); }
.page-about .partner--pack { border-top: 3px solid var(--moss); }
.page-about .partner--insure { border-top: 3px solid var(--violet); }

.page-about .partner__num {
  margin: 0;
  font-size: 26px;
  font-weight: 500;
  letter-spacing: -.01em;
  color: var(--white);
}

.page-about .partner h3 {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  color: var(--mist);
}

.page-about .partner p:last-child {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--mist);
}

/* ---------- 能力演进 ---------- */
.page-about .about-sec--road {
  padding-bottom: 56px;
}

.page-about .roadmap {
  margin-top: 30px;
}

.page-about .roadmap__rail {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  scrollbar-width: thin;
}

.page-about .roadmap__node {
  flex: 0 0 auto;
  display: grid;
  gap: 4px;
  padding: 12px 16px;
  text-decoration: none;
  color: var(--mist);
  border: 1px solid var(--line);
  background: rgba(6, 23, 41, .6);
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

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

.page-about .roadmap__node-tx {
  font-size: 14.5px;
  font-weight: 600;
}

.page-about .roadmap__node:hover,
.page-about .roadmap__node:focus-visible {
  color: var(--cyan);
  border-color: var(--cyan);
  transform: translateY(-2px);
}

.page-about .roadmap__phases {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .phase {
  position: relative;
  padding: 0 0 26px 24px;
  border-left: 1px solid var(--line);
}

.page-about .phase:last-child {
  padding-bottom: 0;
}

.page-about .phase::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 6px;
  width: 9px;
  height: 9px;
  background: var(--navy);
  border: 1px solid var(--clay);
  transform: rotate(45deg);
}

.page-about .phase h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  line-height: 1.3;
  color: var(--white);
}

.page-about .phase p {
  margin: 10px 0 0;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 结尾行动区 ---------- */
.page-about .about-cta {
  margin-top: 8px;
  padding: 34px 22px 36px;
  background:
    linear-gradient(120deg, rgba(0, 229, 199, .1) 0%, rgba(124, 92, 255, .08) 52%, rgba(255, 122, 69, .1) 100%),
    var(--navy-deep);
  border: 1px solid var(--line);
  clip-path: polygon(20px 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%, 0 20px);
}

.page-about .about-cta h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(21px, 2.6vw, 28px);
  line-height: 1.28;
  color: var(--white);
}

.page-about .about-cta__tx {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--mist);
}

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

/* ---------- 图片容器 ---------- */
.page-about .media img {
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 平板 ---------- */
@media (min-width: 720px) {
  .page-about .about-cover__inner {
    padding: 88px 0 60px;
  }

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

  .page-about .about-facts__item {
    padding: 16px 18px 18px;
  }

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

  .page-about .method-grid {
    grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr);
    align-items: start;
  }

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

@media (min-width: 860px) {
  .page-about .team-grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, .8fr);
    align-items: start;
  }

  .page-about .about-sec--method {
    padding: 34px 26px 40px;
  }

  .page-about .about-cta {
    padding: 42px 36px 44px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 960px) {
  .page-about .about-layout {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: 60px;
    padding-top: 76px;
    padding-bottom: 110px;
  }

  .page-about .about-rail {
    display: block;
    position: sticky;
    top: 96px;
    align-self: start;
    padding-left: 16px;
    border-left: 1px solid var(--line);
  }

  .page-about .about-sec {
    padding: 52px 0 56px;
  }

  .page-about .about-cover__inner {
    padding: 118px 0 76px;
  }

  .page-about .badge-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
  }

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

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .badge,
  .page-about .roadmap__node,
  .page-about .about-rail__list a,
  .page-about .about-rail__list a::before {
    transition: none;
  }

  .page-about .badge:hover,
  .page-about .badge:focus-within,
  .page-about .roadmap__node:hover,
  .page-about .roadmap__node:focus-visible {
    transform: none;
  }
}