.page-about {
  color: var(--white);
  --about-detail: rgba(0, 230, 118, .16);
}

.page-about .about-crumb {
  padding-top: 20px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 18px 0 0;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(130% 90% at 88% 0%, rgba(0, 230, 118, .22), transparent 58%),
    radial-gradient(100% 80% at 0% 98%, rgba(255, 109, 0, .18), transparent 62%);
  clip-path: polygon(0 0, 100% 0, 100% 70%, 0 100%);
}

.page-about .about-hero-grid {
  position: relative;
  display: grid;
  gap: 30px;
  padding-bottom: 34px;
}

.page-about .about-kicker {
  margin: 0;
  color: var(--green-soft);
  letter-spacing: .16em;
  font-size: 11px;
}

.page-about .about-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-size: clamp(34px, 9.5vw, 78px);
  line-height: .98;
  letter-spacing: -.01em;
  text-transform: none;
}

.page-about .about-hero-lede {
  margin: 18px 0 0;
  max-width: 48ch;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.95;
}

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

.page-about .about-hero-figure {
  margin: 0;
  position: relative;
}

.page-about .about-hero-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 36px), calc(100% - 36px) 100%, 0 100%);
  object-fit: cover;
}

.page-about .about-hero-figure figcaption {
  display: block;
  margin-top: 10px;
  color: var(--muted);
  letter-spacing: .12em;
  font-size: 11px;
}

.page-about .about-coords {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 22px 0 28px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 12px;
  border-top: 1px solid var(--line);
}

.page-about .about-coord-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(26px, 7vw, 42px);
  font-weight: 700;
  line-height: 1;
  color: var(--green);
}

.page-about .about-coord-label {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--muted);
}

/* ---------- 通用区块 ---------- */
.page-about .about-band {
  padding: 46px 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-band-head {
  max-width: 62ch;
  margin-bottom: 28px;
}

.page-about .about-band h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(26px, 6.4vw, 46px);
  line-height: 1.06;
  letter-spacing: .005em;
}

.page-about .about-band h3 {
  margin: 0 0 8px;
  font-size: 17px;
  line-height: 1.45;
  color: var(--white);
}

.page-about .about-band p {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.9;
}

.page-about .about-band p:last-child {
  margin-bottom: 0;
}

.page-about .about-band-lede {
  margin-top: 14px;
  max-width: 56ch;
}

/* ---------- 起点 ---------- */
.page-about .about-origin-grid {
  display: grid;
  gap: 30px;
}

.page-about .about-origin-lead p {
  font-size: 15.5px;
}

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

.page-about .about-note {
  padding: 18px 18px 18px 20px;
  background: linear-gradient(150deg, var(--ink-800), var(--ink-900));
  border-left: 2px solid var(--green);
}

.page-about .about-note h3 {
  font-size: 16px;
}

.page-about .about-note p {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
}

/* ---------- 团队 ---------- */
.page-about .about-team-grid {
  display: grid;
  gap: 24px;
}

.page-about .about-roles {
  display: grid;
  gap: 14px;
}

.page-about .about-role {
  position: relative;
  padding: 20px 20px 22px;
  background: linear-gradient(160deg, var(--ink-800), var(--ink-900) 88%);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 0 100%);
}

.page-about .about-role-index {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--orange);
  font-size: 11px;
  letter-spacing: .16em;
}

.page-about .about-role p {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
}

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

.page-about .about-team-figure img,
.page-about .about-flow-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line);
  clip-path: polygon(22px 0, 100% 0, 100% 100%, 0 100%, 0 22px);
  object-fit: cover;
}

.page-about .about-team-figure figcaption,
.page-about .about-flow-figure figcaption {
  display: block;
  margin-top: 10px;
  color: var(--muted);
  font-size: 11px;
  letter-spacing: .12em;
}

/* ---------- 生产流程 ---------- */
.page-about .about-flow-grid {
  display: grid;
  gap: 28px;
}

.page-about .about-flow-figure {
  margin: 0;
  order: 2;
}

.page-about .about-flow-body {
  order: 1;
}

.page-about .about-steps {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .about-step {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr);
  gap: 14px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.page-about .about-step-num {
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--green);
  word-break: break-word;
}

.page-about .about-step-num em {
  display: block;
  margin-top: 4px;
  font-style: normal;
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--muted);
}

.page-about .about-step:nth-child(2) .about-step-num {
  color: var(--orange);
}

.page-about .about-step:nth-child(3) .about-step-num {
  color: var(--yellow);
}

.page-about .about-step-body h3 {
  font-size: 16px;
  margin-bottom: 6px;
}

.page-about .about-step-body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 4px;
  display: grid;
  gap: 26px;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--green-soft), var(--line) 42%, var(--line));
}

.page-about .about-milestone {
  position: relative;
  padding-left: 26px;
}

.page-about .about-milestone::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 11px;
  height: 11px;
  background: var(--ink-900);
  border: 2px solid var(--green);
  transform: rotate(45deg);
}

.page-about .about-year {
  display: inline-block;
  margin-bottom: 8px;
  color: var(--green-soft);
  font-size: 12px;
  letter-spacing: .14em;
}

.page-about .about-milestone-body h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

.page-about .about-milestone-body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.9;
}

.page-about .about-more {
  margin-top: 12px;
  border: 1px solid var(--line);
  background: rgba(19, 26, 58, .7);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
}

.page-about .about-more summary {
  cursor: pointer;
  padding: 11px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--orange);
  list-style: none;
}

.page-about .about-more summary::-webkit-details-marker {
  display: none;
}

.page-about .about-more summary::after {
  content: "+";
  float: right;
  font-size: 14px;
  color: var(--muted);
}

.page-about .about-more[open] summary::after {
  content: "–";
}

.page-about .about-more-body {
  padding: 0 14px 14px;
}

.page-about .about-more-body p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- 合作与荣誉 ---------- */
.page-about .about-partners-grid {
  display: grid;
  gap: 30px;
}

.page-about .about-partners-copy p {
  font-size: 15px;
}

.page-about .about-partners-side {
  display: grid;
  gap: 18px;
}

.page-about .about-partner-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .about-partner-card {
  padding: 20px 16px;
  background:
    linear-gradient(155deg, rgba(0, 230, 118, .14), transparent 62%),
    var(--ink-800);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%);
}

.page-about .about-partner-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 40px;
  font-weight: 700;
  line-height: 1;
  color: var(--green);
}

.page-about .about-partner-label {
  display: block;
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: .04em;
  color: var(--muted);
}

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

.page-about .about-honors .tag {
  border: 1px solid var(--line);
  color: var(--white);
  font-size: 12px;
  letter-spacing: .03em;
  padding: 8px 12px;
  background: rgba(28, 42, 74, .5);
}

/* ---------- 服务承诺 ---------- */
.page-about .about-promise {
  padding-bottom: 64px;
}

.page-about .about-promise-panel {
  position: relative;
  display: grid;
  gap: 26px;
  padding: 26px 20px;
  background:
    radial-gradient(110% 120% at 100% 0%, rgba(255, 109, 0, .18), transparent 55%),
    radial-gradient(100% 120% at 0% 100%, rgba(0, 230, 118, .16), transparent 58%),
    var(--ink-800);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, calc(100% - 30px) 0, 100% 30px, 100% 100%, 30px 100%, 0 calc(100% - 30px));
}

.page-about .about-promise-copy p {
  font-size: 15px;
  line-height: 1.9;
}

.page-about .about-promise-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

.page-about .about-promise-facts {
  margin: 0;
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-about .about-fact {
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

.page-about .about-fact dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--muted);
}

.page-about .about-fact dd {
  margin: 6px 0 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--white);
  word-break: break-word;
}

/* ---------- 平板 ---------- */
@media (min-width: 640px) {
  .page-about .about-coords {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
  }

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

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

  .page-about .about-promise-panel {
    padding: 32px 30px;
  }

  .page-about .about-promise-facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px 24px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 960px) {
  .page-about .about-hero {
    padding-top: 26px;
  }

  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, .98fr);
    align-items: end;
    gap: 44px;
    padding-bottom: 46px;
  }

  .page-about .about-hero-figure {
    transform: translateY(8px);
  }

  .page-about .about-coords {
    padding: 26px 0 34px;
  }

  .page-about .about-band {
    padding: 66px 0;
  }

  .page-about .about-origin-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: 52px;
    align-items: start;
  }

  .page-about .about-origin-notes {
    grid-template-columns: minmax(0, 1fr);
    gap: 18px;
  }

  .page-about .about-team-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    gap: 32px;
    align-items: start;
  }

  .page-about .about-flow-grid {
    grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .about-flow-figure {
    order: 1;
    position: sticky;
    top: 96px;
  }

  .page-about .about-flow-body {
    order: 2;
  }

  .page-about .about-timeline {
    padding-left: 8px;
  }

  .page-about .about-milestone {
    padding-left: 40px;
  }

  .page-about .about-partners-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    gap: 52px;
    align-items: start;
  }

  .page-about .about-promise-panel {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, .8fr);
    gap: 44px;
    padding: 42px 44px;
  }

  .page-about .about-promise {
    padding-bottom: 84px;
  }
}