.page-about {
  --about-gap: clamp(18px, 3.2vw, 34px);
  padding-bottom: 10px;
}

.page-about .about-top {
  padding-top: 26px;
}

.page-about .about-top .crumbs {
  margin: 0;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: 22px;
  padding-bottom: clamp(42px, 6vw, 78px);
}

.page-about .about-hero-grid {
  align-items: center;
  gap: clamp(26px, 4vw, 52px);
}

.page-about .about-hero-copy .display {
  margin: 14px 0 18px;
  font-size: clamp(30px, 5.2vw, 58px);
  line-height: 1.06;
  letter-spacing: -0.02em;
}

.page-about .about-hero-copy .lede {
  max-width: 46ch;
}

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

.page-about .about-hero-points {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-about .about-hero-points li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--line-dark-soft);
  font-size: 15px;
  color: var(--muted-paper);
}

.page-about .about-hero-points .mono-label {
  color: var(--cyan-400);
  flex: 0 0 auto;
}

.page-about .about-hero-visual {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.page-about .about-hero-frame {
  position: relative;
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: var(--shadow-board);
}

.page-about .about-hero-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(60% 45% at 78% 12%, rgba(255, 106, 31, 0.34), transparent 68%),
    radial-gradient(52% 40% at 16% 92%, rgba(122, 60, 255, 0.4), transparent 70%);
  pointer-events: none;
}

.page-about .about-frame-cap {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--muted-paper);
  text-transform: uppercase;
}

/* ---------- 通用小节头 ---------- */
.page-about .about-head {
  max-width: 66ch;
  margin-bottom: clamp(24px, 3.4vw, 38px);
}

.page-about .about-head .section-title {
  margin: 12px 0 14px;
}

.page-about .about-lede {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--muted-paper);
}

/* ---------- 岗位线横向卷轴 ---------- */
.page-about .about-roles {
  padding-bottom: clamp(38px, 5vw, 66px);
}

.page-about .about-rail {
  gap: 16px;
  padding-bottom: 14px;
}

.page-about .about-rail > * {
  flex: 0 0 min(84vw, 322px);
  scroll-snap-align: start;
}

.page-about .about-role {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 24px 22px 26px;
  border: 1px solid var(--line-dark);
  border-radius: var(--r-lg);
  background: var(--ink-800);
  box-shadow: var(--shadow-board);
  transition: transform 0.24s var(--ease), border-color 0.24s var(--ease);
}

.page-about .about-role:hover,
.page-about .about-role:focus-within {
  transform: translateY(-4px);
  border-color: rgba(255, 106, 31, 0.55);
}

.page-about .about-role-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--gold-400);
}

.page-about .about-role-title {
  margin: 0;
  font-size: 21px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--text-paper);
}

.page-about .about-role-text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted-paper);
}

.page-about .about-role-list {
  list-style: none;
  margin: 4px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .about-role-list li {
  position: relative;
  padding-left: 16px;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--text-paper);
}

.page-about .about-role-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan-400);
}

.page-about .about-role:nth-child(2) .about-role-list li::before {
  background: var(--orange-500);
}

.page-about .about-role:nth-child(3) .about-role-list li::before {
  background: var(--violet-500);
}

.page-about .about-role:nth-child(4) .about-role-list li::before {
  background: var(--gold-400);
}

/* ---------- 流程 ---------- */
.page-about .about-flow {
  padding-bottom: clamp(38px, 5vw, 66px);
}

.page-about .about-flow-grid {
  gap: clamp(24px, 3.6vw, 48px);
  align-items: start;
}

.page-about .about-flow-copy .section-title {
  margin: 12px 0 14px;
}

.page-about .about-steps {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  border-top: 1px solid var(--line-dark-soft);
}

.page-about .about-step {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 14px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line-dark-soft);
}

.page-about .about-step-num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--orange-500);
  padding-top: 2px;
}

.page-about .about-step-title {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 800;
  color: var(--text-paper);
}

.page-about .about-step p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.74;
  color: var(--muted-paper);
}

.page-about .about-flow-media {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.page-about .about-flow-frame {
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: var(--shadow-board);
}

.page-about .about-flow-media .aside-note {
  margin: 0;
}

/* ---------- 数据条 ---------- */
.page-about .about-numbers {
  padding-bottom: clamp(38px, 5vw, 62px);
}

/* ---------- 客服 ---------- */
.page-about .about-support {
  padding-bottom: clamp(30px, 4vw, 52px);
}

.page-about .about-support-grid {
  gap: clamp(20px, 3vw, 36px);
  align-items: stretch;
}

.page-about .about-support-board {
  padding: clamp(24px, 3.6vw, 42px);
  height: 100%;
}

.page-about .about-support-board .section-title {
  margin: 12px 0 14px;
  color: var(--text-ink);
}

.page-about .about-support-board .eyebrow {
  color: var(--violet-500);
}

.page-about .about-support-board .about-lede {
  color: var(--muted-ink);
}

.page-about .contact-grid {
  display: grid;
  gap: 12px;
  margin: 24px 0 0;
}

.page-about .contact-grid .contact-row {
  padding: 12px 0;
  border-bottom: 1px solid var(--line-paper);
}

.page-about .contact-grid .contact-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--muted-ink);
}

.page-about .contact-grid .contact-value {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-ink);
}

.page-about .about-support-note {
  margin: 16px 0 22px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--muted-ink);
}

.page-about .about-support-frame {
  height: 100%;
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: var(--shadow-board);
}

/* ---------- 延伸入口 ---------- */
.page-about .about-extend {
  padding-bottom: clamp(40px, 5vw, 66px);
}

.page-about .about-extend-board {
  padding: clamp(20px, 2.8vw, 30px);
  border: 1px solid var(--line-dark);
  border-radius: var(--r-lg);
  background: linear-gradient(135deg, rgba(23, 20, 38, 0.92), rgba(10, 9, 18, 0.94));
  box-shadow: var(--shadow-board);
}

.page-about .about-extend-board > .mono-label {
  color: var(--gold-400);
}

.page-about .about-extend-links {
  display: grid;
  gap: 10px;
  margin-top: 14px;
}

.page-about .about-extend-links .link-more {
  font-size: 15px;
}

/* ---------- 媒体 ---------- */
.page-about .about-hero-frame img,
.page-about .about-flow-frame img,
.page-about .about-support-frame img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

/* ---------- 桌面增强 ---------- */
@media (min-width: 901px) {
  .page-about .about-flow-media {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }

  .page-about .about-extend-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px 32px;
  }
}

@media (max-width: 900px) {
  .page-about .about-hero-grid,
  .page-about .about-flow-grid,
  .page-about .about-support-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-about .about-hero-copy .lede {
    max-width: none;
  }

  .page-about .about-support-board {
    height: auto;
  }

  .page-about .about-support-frame {
    height: auto;
  }

  .page-about .about-support-frame img {
    aspect-ratio: 1 / 1;
  }
}

@media (max-width: 560px) {
  .page-about .about-top {
    padding-top: 18px;
  }

  .page-about .about-hero {
    padding-top: 16px;
  }

  .page-about .about-hero-actions .btn {
    flex: 1 1 auto;
    text-align: center;
  }

  .page-about .about-hero-points li {
    flex-direction: column;
    gap: 4px;
  }

  .page-about .about-step {
    grid-template-columns: 34px 1fr;
    gap: 10px;
  }

  .page-about .about-rail > * {
    flex-basis: min(88vw, 300px);
  }

  .page-about .contact-grid .contact-row {
    display: flex;
    flex-direction: column;
    gap: 4px;
  }
}