.page-about {
  --about-rail-w: 220px;
  --about-hair: rgba(147, 160, 196, .18);
  background:
    radial-gradient(1100px 560px at 10% -4%, rgba(255, 106, 31, .10), transparent 62%),
    radial-gradient(900px 520px at 94% 6%, rgba(138, 92, 255, .10), transparent 60%),
    var(--ink-900);
  color: var(--white);
  overflow-x: hidden;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb-wrap {
  padding-top: 22px;
}
.page-about .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  letter-spacing: .05em;
  color: var(--mist);
}
.page-about .breadcrumbs a {
  color: var(--mist);
  text-decoration: none;
  transition: color .24s var(--ease);
}
.page-about .breadcrumbs a:hover {
  color: var(--neon);
}
.page-about .breadcrumbs-sep {
  color: rgba(147, 160, 196, .5);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: 26px 0 0;
}
.page-about .about-hero__frame {
  position: relative;
  display: grid;
  gap: 30px;
  padding: 30px 20px 34px;
  border: 1px solid rgba(147, 160, 196, .34);
  border-radius: var(--radius-lg);
  background: linear-gradient(170deg, rgba(27, 36, 80, .66), rgba(7, 11, 30, .92));
  box-shadow: var(--shadow-soft);
  overflow: hidden;
}
.page-about .about-hero__frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(90deg, rgba(147, 160, 196, .10) 0 1px, transparent 1px 58px),
    repeating-linear-gradient(0deg, rgba(147, 160, 196, .07) 0 1px, transparent 1px 58px);
  opacity: .55;
  pointer-events: none;
}
.page-about .about-hero__frame::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 100%;
  background: linear-gradient(180deg, var(--neon), var(--violet) 58%, transparent);
  box-shadow: var(--glow-neon);
}
.page-about .about-hero__copy,
.page-about .about-hero__deck {
  position: relative;
  z-index: 1;
}
.page-about .eyebrow {
  margin: 0;
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--amber);
  text-transform: uppercase;
}
.page-about .about-hero h1 {
  margin: 14px 0 18px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 29px;
  line-height: 1.18;
  letter-spacing: -.02em;
  color: var(--white);
  text-shadow: 0 0 26px rgba(255, 106, 31, .18);
}
.page-about .about-hero__lead {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(232, 236, 247, .9);
}
.page-about .about-hero__note {
  margin: 0;
  padding-left: 14px;
  border-left: 2px solid rgba(255, 106, 31, .55);
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-hero__deck {
  border: 1px solid var(--about-hair);
  border-radius: var(--radius);
  background: linear-gradient(158deg, rgba(27, 36, 80, .8), rgba(10, 16, 41, .92));
  padding: 4px 18px;
  box-shadow: var(--shadow-soft);
}
.page-about .deck-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 14px;
  padding: 13px 0;
  border-bottom: 1px solid var(--about-hair);
}
.page-about .deck-row:last-child {
  border-bottom: 0;
}
.page-about .deck-key {
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--mist);
  flex: 0 0 auto;
}
.page-about .deck-val {
  font-family: var(--font-mono);
  font-size: 17px;
  color: var(--amber);
  text-shadow: var(--glow-amber);
  text-align: right;
}

/* ---------- 首屏横图 ---------- */
.page-about .about-hero__figure {
  margin: 28px auto 0;
  border: 1px solid var(--about-hair);
  border-radius: var(--radius-lg);
  background: var(--ink-700);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}
.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  filter: saturate(1.05) contrast(1.02);
}

/* ---------- 主体骨架：刻度轴 + 内容流 ---------- */
.page-about .about-body {
  display: grid;
  gap: 30px;
  padding: 44px 0 0;
}
.page-about .about-rail {
  display: none;
}
.page-about .about-stream {
  display: grid;
  gap: 58px;
  min-width: 0;
}

/* ---------- 章节头 ---------- */
.page-about .about-stage {
  scroll-margin-top: 96px;
}
.page-about .about-stage__head {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 10px 14px;
  margin: 0 0 24px;
}
.page-about .band-num {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: .14em;
  color: var(--amber);
  text-shadow: var(--glow-amber);
}
.page-about .band-rule {
  display: block;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, var(--neon), rgba(138, 92, 255, .5) 46%, transparent);
}
.page-about .band-kicker {
  grid-column: 1 / -1;
  margin: 0;
  font-size: 11.5px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--mist);
}
.page-about .band-title {
  grid-column: 1 / -1;
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 25px;
  line-height: 1.32;
  color: var(--white);
}

/* ---------- 通用分栏 ---------- */
.page-about .about-cols {
  display: grid;
  gap: 22px;
}
.page-about .about-text p {
  margin: 0 0 1.15em;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(232, 236, 247, .86);
}
.page-about .about-text p:last-child {
  margin-bottom: 0;
}
.page-about .about-text a {
  color: var(--amber);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 179, 71, .4);
  transition: color .24s var(--ease), border-color .24s var(--ease);
}
.page-about .about-text a:hover {
  color: var(--neon);
  border-color: var(--neon);
}
.page-about .about-intro,
.page-about .about-tail {
  margin: 0 0 20px;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(232, 236, 247, .84);
  max-width: 62ch;
}
.page-about .about-tail {
  margin: 20px 0 0;
  color: var(--mist);
}
.page-about .about-tail a {
  color: var(--amber);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 179, 71, .4);
}
.page-about .about-tail a:hover {
  color: var(--neon);
  border-color: var(--neon);
}
.page-about .about-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 20px 0 0;
}

/* ---------- 卡片 ---------- */
.page-about .card {
  border: 1px solid var(--about-hair);
  border-radius: var(--radius);
  background: linear-gradient(158deg, rgba(27, 36, 80, .72), rgba(10, 16, 41, .9));
  padding: 22px;
  transition: transform .28s var(--ease), border-color .28s var(--ease), box-shadow .28s var(--ease);
}
.page-about .card:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 106, 31, .48);
  box-shadow: 0 0 0 1px rgba(255, 106, 31, .14), 0 16px 34px rgba(3, 6, 20, .55);
}
.page-about .card-title {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 18px;
  line-height: 1.4;
  color: var(--white);
}
.page-about .card-body {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 灯火三步 ---------- */
.page-about .about-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}
.page-about .about-steps li {
  position: relative;
  counter-increment: step;
  padding: 11px 0 11px 34px;
  font-size: 14.5px;
  line-height: 1.7;
  color: rgba(232, 236, 247, .84);
  border-bottom: 1px solid var(--about-hair);
}
.page-about .about-steps li:last-child {
  border-bottom: 0;
}
.page-about .about-steps li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
}

/* ---------- 六大模块 ---------- */
.page-about .about-modules {
  display: grid;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .about-module {
  position: relative;
  padding-top: 24px;
}
.page-about .module-num {
  position: absolute;
  top: 18px;
  right: 20px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: rgba(255, 179, 71, .5);
}
.page-about .about-module::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 40px;
  height: 2px;
  background: linear-gradient(90deg, var(--neon), transparent);
}

/* ---------- 指标块 ---------- */
.page-about .about-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  border: 1px solid var(--about-hair);
  border-radius: var(--radius);
  background: var(--about-hair);
  overflow: hidden;
}
.page-about .metric {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 20px 16px;
  background: linear-gradient(160deg, rgba(27, 36, 80, .78), rgba(10, 16, 41, .94));
}
.page-about .metric-num {
  font-family: var(--font-mono);
  font-size: 26px;
  line-height: 1;
  color: var(--amber);
  text-shadow: var(--glow-amber);
}
.page-about .metric-num em {
  font-style: normal;
  font-size: 12px;
  margin-left: 4px;
  color: var(--mist);
  text-shadow: none;
}
.page-about .metric-label {
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 团队 ---------- */
.page-about .about-team-figure {
  margin: 0 0 24px;
}
.page-about .media-frame {
  position: relative;
  border: 1px solid var(--about-hair);
  border-radius: var(--radius-lg);
  background: var(--ink-700);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}
.page-about .media-frame img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .media-frame--wide img {
  aspect-ratio: 11 / 7;
}
.page-about .media-frame--tall img {
  aspect-ratio: 3 / 2;
}
.page-about .media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(7, 11, 30, 0) 55%, rgba(7, 11, 30, .55));
  pointer-events: none;
}
.page-about .about-crews {
  display: grid;
  gap: 16px;
}
.page-about .about-crew {
  position: relative;
  padding-left: 22px;
}
.page-about .about-crew::before {
  content: "";
  position: absolute;
  left: 0;
  top: 20px;
  bottom: 20px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan), rgba(47, 224, 200, 0));
  opacity: .7;
}

/* ---------- 历程时间轴 ---------- */
.page-about .about-mile {
  position: relative;
  margin: 26px 0 0;
  padding: 0 0 0 22px;
  list-style: none;
}
.page-about .about-mile::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, rgba(255, 106, 31, .75), rgba(138, 92, 255, .35) 60%, transparent);
}
.page-about .about-mile > li {
  margin-bottom: 6px;
}
.page-about .mile {
  border-bottom: 1px solid var(--about-hair);
}
.page-about .mile__sum {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 13px 0 13px 2px;
  cursor: pointer;
  list-style: none;
}
.page-about .mile__sum::-webkit-details-marker {
  display: none;
}
.page-about .mile__dot {
  position: absolute;
  left: -21px;
  width: 9px;
  height: 9px;
  border-radius: 1px;
  border: 1px solid rgba(147, 160, 196, .5);
  background: rgba(147, 160, 196, .12);
  transition: background .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease);
}
.page-about .about-mile > li {
  position: relative;
}
.page-about .mile__sum:hover .mile__dot,
.page-about .mile[open] .mile__dot {
  background: var(--neon);
  border-color: var(--neon);
  box-shadow: 0 0 12px rgba(255, 106, 31, .75);
}
.page-about .mile__label {
  font-family: var(--font-serif);
  font-size: 16px;
  color: var(--white);
}
.page-about .mile__meta {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--mist);
  text-align: right;
}
.page-about .mile__note {
  margin: 0 0 14px;
  padding-left: 2px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist);
}
.page-about .about-history-figure {
  margin: 0;
}

/* ---------- 本地服务 ---------- */
.page-about .about-contact-card {
  padding: 22px 20px;
}
.page-about .local-line {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px 0;
  border-bottom: 1px solid var(--about-hair);
}
.page-about .local-line:last-child {
  border-bottom: 0;
}
.page-about .local-key {
  font-size: 11.5px;
  letter-spacing: .16em;
  color: rgba(47, 224, 200, .82);
}
.page-about .local-val {
  font-size: 14.5px;
  line-height: 1.7;
  color: rgba(232, 236, 247, .88);
}

/* ---------- 合作 ---------- */
.page-about .about-partner-list {
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .about-partner-list li {
  position: relative;
  padding: 10px 0 10px 16px;
  font-size: 14.5px;
  line-height: 1.7;
  color: rgba(232, 236, 247, .84);
  border-bottom: 1px solid var(--about-hair);
}
.page-about .about-partner-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18px;
  width: 6px;
  height: 6px;
  border-radius: 1px;
  background: var(--violet);
  box-shadow: 0 0 10px rgba(138, 92, 255, .6);
}
.page-about .about-partner-cta {
  margin: 18px 0 0;
}

/* ---------- 结尾 ---------- */
.page-about .about-close {
  padding: 30px 20px 8px;
  border-top: 1px solid var(--about-hair);
  background: linear-gradient(180deg, rgba(27, 36, 80, .35), transparent 80%);
}
.page-about .about-close__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 23px;
  line-height: 1.25;
  letter-spacing: -.01em;
  color: var(--white);
}
.page-about .about-close__text {
  margin: 0 0 20px;
  max-width: 60ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(232, 236, 247, .84);
}
.page-about .about-close__text a {
  color: var(--amber);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 179, 71, .4);
}
.page-about .about-close__text a:hover {
  color: var(--neon);
  border-color: var(--neon);
}
.page-about .about-close__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 0;
}
.page-about .about-close .btn {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

/* ---------- 按钮兜底 ---------- */
.page-about .btn {
  font-family: var(--font-body);
  font-size: 14.5px;
  letter-spacing: .02em;
  border-radius: var(--radius);
  padding: 11px 20px;
  text-decoration: none;
  transition: transform .24s var(--ease), box-shadow .24s var(--ease), color .24s var(--ease), border-color .24s var(--ease);
}
.page-about .btn--neon {
  background: var(--neon);
  color: #10060A;
  border: 1px solid var(--neon);
  box-shadow: var(--glow-neon);
}
.page-about .btn--neon:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 24px rgba(255, 106, 31, .55);
}
.page-about .btn--ghost {
  background: transparent;
  color: var(--white);
  border: 1px solid rgba(147, 160, 196, .38);
}
.page-about .btn--ghost:hover {
  border-color: var(--violet);
  color: var(--amber);
}

/* ---------- 移动端抽屉目录 ---------- */
.page-about .about-rail__cta {
  display: none;
}

/* ---------- 断点 ---------- */
@media (min-width: 620px) {
  .page-about .about-modules {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-crews {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-hero h1 {
    font-size: 36px;
  }
}

@media (min-width: 860px) {
  .page-about .about-hero__frame {
    grid-template-columns: 1.15fr .85fr;
    gap: 46px;
    align-items: start;
    padding: 48px 44px 52px;
  }
  .page-about .about-hero h1 {
    font-size: 46px;
  }
  .page-about .about-hero__lead {
    font-size: 17px;
  }
  .page-about .about-cols {
    grid-template-columns: 1.1fr .9fr;
    gap: 34px;
    align-items: start;
  }
  .page-about .about-cols--alt {
    grid-template-columns: .9fr 1.1fr;
  }
  .page-about .band-title {
    font-size: 32px;
  }
  .page-about .about-intro,
  .page-about .about-tail,
  .page-about .about-text p {
    font-size: 17px;
  }
  .page-about .about-close__title {
    font-size: 30px;
  }
  .page-about .about-close {
    padding: 40px 0 12px;
  }
}

@media (min-width: 1040px) {
  .page-about .about-body {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: 58px;
    align-items: start;
  }
  .page-about .about-rail {
    display: block;
    position: sticky;
    top: 96px;
    padding-left: 20px;
  }
  .page-about .about-rail::before {
    content: "";
    position: absolute;
    left: 0;
    top: 26px;
    bottom: 60px;
    width: 2px;
    background: linear-gradient(180deg, var(--neon), var(--violet) 58%, rgba(138, 92, 255, 0));
    box-shadow: var(--glow-neon);
    opacity: .75;
  }
  .page-about .toc-title {
    margin: 0 0 10px;
    font-family: var(--font-mono);
    font-size: 11.5px;
    letter-spacing: .2em;
    color: var(--mist);
    text-transform: uppercase;
  }
  .page-about .about-toc {
    margin: 0;
    padding: 0;
    list-style: none;
  }
  .page-about .about-toc > li {
    margin: 0;
  }
  .page-about .about-toc .toc-link {
    position: relative;
    display: block;
    padding: 14px 0 14px 20px;
    font-size: 14px;
    line-height: 1.5;
    color: var(--mist);
    text-decoration: none;
    border-bottom: 1px solid var(--about-hair);
    transition: color .26s var(--ease);
  }
  .page-about .about-toc .toc-link::before {
    content: "";
    position: absolute;
    left: 0;
    top: 19px;
    width: 8px;
    height: 8px;
    border-radius: 1px;
    border: 1px solid rgba(147, 160, 196, .45);
    background: rgba(147, 160, 196, .1);
    transition: background .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease);
  }
  .page-about .about-toc .toc-link:hover {
    color: var(--amber);
  }
  .page-about .about-toc .toc-link[aria-current="true"] {
    color: var(--white);
  }
  .page-about .about-toc .toc-link[aria-current="true"]::before {
    background: var(--neon);
    border-color: var(--neon);
    box-shadow: 0 0 12px rgba(255, 106, 31, .75);
  }
  .page-about .about-rail__cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-top: 22px;
    font-size: 13.5px;
    padding: 10px 16px;
  }
  .page-about .band-title {
    font-size: 36px;
  }
  .page-about .about-close__title {
    font-size: 34px;
  }
}

@media (min-width: 1200px) {
  .page-about .about-modules {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-crews {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-hero h1 {
    font-size: 54px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .card,
  .page-about .btn,
  .page-about .mile__dot,
  .page-about .about-toc .toc-link::before {
    transition: none;
  }
  .page-about .card:hover,
  .page-about .btn:hover {
    transform: none;
  }
}