.page-about .breadcrumb {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-top: clamp(18px, 3vw, 32px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink-muted);
}

.page-about .breadcrumb__link {
  color: var(--ink-muted);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}

.page-about .breadcrumb__link:hover {
  color: var(--neon-cyan);
}

.page-about .breadcrumb__sep {
  color: var(--cool-line);
}

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

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(26px, 4.5vw, 52px) clamp(44px, 7vw, 88px);
  background:
    radial-gradient(820px 420px at 88% -18%, rgba(47, 243, 208, 0.13), transparent 62%),
    radial-gradient(680px 360px at 4% 6%, rgba(138, 107, 255, 0.14), transparent 64%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(34, 48, 76, 0.55) 1px, transparent 1px),
    linear-gradient(90deg, rgba(34, 48, 76, 0.55) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.7), transparent 74%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.7), transparent 74%);
  opacity: 0.55;
  pointer-events: none;
}

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

.page-about .about-hero__tag {
  margin: 0 0 20px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--neon-cyan);
}

.page-about .about-hero__title {
  margin: 0 0 24px;
  max-width: 880px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(36px, 7vw, 82px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-about .about-hero__lead {
  margin: 0;
  max-width: 660px;
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.85;
  color: var(--ink-muted);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(34px, 5vw, 64px);
  background: var(--cool-line);
  border: 1px solid var(--cool-line);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: clamp(16px, 2.3vw, 28px);
  background: var(--panel);
}

.page-about .about-stat__num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.2vw, 38px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--neon-cyan);
}

.page-about .about-stat__num em {
  font-style: normal;
  font-size: 0.46em;
  margin-left: 3px;
  color: var(--ink-muted);
}

.page-about .about-stat__label {
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--ink-muted);
}

/* ---------- 区块骨架 ---------- */

.page-about .about-section {
  padding-block: clamp(52px, 7vw, 94px);
}

.page-about .about-section--band {
  border-top: 1px solid var(--cool-line);
  border-bottom: 1px solid var(--cool-line);
  background: linear-gradient(180deg, rgba(22, 34, 58, 0.5), rgba(6, 11, 24, 0) 78%);
}

.page-about .about-head {
  max-width: 720px;
  margin-bottom: clamp(30px, 4vw, 52px);
}

.page-about .about-head__idx {
  display: block;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--amber);
}

.page-about .about-head__title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 3.6vw, 42px);
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .about-head__lead {
  margin: 0;
  font-size: 16.5px;
  line-height: 1.8;
  color: var(--ink-muted);
}

/* ---------- 业务三块 ---------- */

.page-about .about-what {
  display: grid;
  grid-template-columns: 1.1fr 0.95fr 0.85fr;
  gap: var(--gap);
  align-items: start;
}

.page-about .about-what__card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 14px;
  padding: clamp(22px, 2.6vw, 32px);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-what__card:hover {
  border-color: var(--neon-cyan);
  transform: translateY(-3px);
}

.page-about .about-what__card--b {
  margin-top: clamp(14px, 3vw, 44px);
}

.page-about .about-what__card--c {
  margin-top: clamp(8px, 1.6vw, 22px);
}

.page-about .about-what__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
  line-height: 1.35;
  color: var(--ink);
}

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

/* ---------- 成长历程 ---------- */

.page-about .about-era-grid {
  display: grid;
  grid-template-columns: minmax(0, 2.05fr) minmax(0, 1fr);
  gap: clamp(24px, 4vw, 56px);
  align-items: start;
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(22px, 3vw, 40px);
}

.page-about .about-era {
  position: relative;
  padding-left: 22px;
  border-left: 1px solid var(--cool-line);
}

.page-about .about-era::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 6px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--neon-cyan);
  box-shadow: 0 0 0 4px rgba(47, 243, 208, 0.14);
}

.page-about .about-era--alt::before {
  left: -6px;
  width: 11px;
  height: 11px;
  background: transparent;
  border: 2px solid var(--amber);
  box-shadow: none;
}

.page-about .about-era__year {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--neon-cyan);
}

.page-about .about-era--alt .about-era__year {
  color: var(--amber);
}

.page-about .about-era__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  line-height: 1.35;
  color: var(--ink);
}

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

.page-about .about-era__now {
  margin: clamp(28px, 3vw, 40px) 0 0;
  padding-top: 20px;
  border-top: 1px solid var(--cool-line);
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.page-about .about-era__now .num {
  color: var(--neon-cyan);
}

.page-about .about-era-figure.media-frame {
  margin: 0;
  aspect-ratio: 3 / 4;
  border-radius: var(--r-lg);
  overflow: hidden;
}

.page-about .about-era-figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 数据来源 ---------- */

.page-about .about-data-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
  gap: clamp(24px, 4vw, 56px);
  align-items: center;
}

.page-about .about-data-figure.media-frame {
  margin: 0;
  border-radius: var(--r-lg);
  overflow: hidden;
}

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

.page-about .about-data-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(14px, 2vw, 24px);
  margin-bottom: 26px;
}

.page-about .about-data-stat {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-left: 16px;
  border-left: 2px solid var(--cool-line);
}

.page-about .about-data-stat:first-child {
  border-left-color: var(--neon-cyan);
}

.page-about .about-data-stat__num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 2.8vw, 32px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--ink);
}

.page-about .about-data-stat__num em {
  font-style: normal;
  font-size: 0.44em;
  margin-left: 3px;
  color: var(--ink-muted);
}

.page-about .about-data-stat__label {
  font-size: 13px;
  color: var(--ink-muted);
}

.page-about .about-data-copy__text {
  margin: 0 0 16px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink-muted);
}

.page-about .about-data-copy__text:last-child {
  margin-bottom: 0;
}

/* ---------- 团队 ---------- */

.page-about .about-team-banner.media-frame {
  margin: 0 0 clamp(30px, 4vw, 52px);
  border-radius: var(--r-lg);
  overflow: hidden;
}

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

.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: clamp(28px, 5vw, 64px);
  align-items: center;
}

.page-about .about-donut {
  position: relative;
  width: min(240px, 68vw);
  aspect-ratio: 1;
  margin: 0 auto clamp(20px, 3vw, 28px);
  border-radius: 50%;
  background: conic-gradient(
    var(--neon-cyan) 0deg 70.43deg,
    var(--electric-violet) 70.43deg 203.48deg,
    var(--amber) 203.48deg 266.09deg,
    var(--ink-muted) 266.09deg 360deg
  );
}

.page-about .about-donut::after {
  content: "46 人";
  position: absolute;
  inset: 22%;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--void);
  font-family: var(--font-mono);
  font-size: clamp(20px, 3.4vw, 26px);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-about .about-legend {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-legend__item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--ink-muted);
}

.page-about .about-legend__item .num {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--ink);
}

.page-about .about-legend__dot {
  flex: none;
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.page-about .about-legend__dot--cyan {
  background: var(--neon-cyan);
}

.page-about .about-legend__dot--violet {
  background: var(--electric-violet);
}

.page-about .about-legend__dot--amber {
  background: var(--amber);
}

.page-about .about-legend__dot--muted {
  background: var(--ink-muted);
}

.page-about .about-body-text {
  margin: 0 0 16px;
  max-width: 58ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink-muted);
}

.page-about .about-body-text:last-child {
  margin-bottom: 0;
}

/* ---------- 校对习惯 ---------- */

.page-about .about-quality__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 36px);
}

.page-about .about-quality__step {
  padding-top: 22px;
  border-top: 1px solid var(--cool-line);
}

.page-about .about-quality__num {
  display: block;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--electric-violet);
}

.page-about .about-quality__step h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  line-height: 1.35;
  color: var(--ink);
}

.page-about .about-quality__step p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-muted);
}

/* ---------- 合作生态 ---------- */

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

.page-about .about-eco__group {
  padding: clamp(22px, 2.6vw, 30px);
  border: 1px solid var(--cool-line);
  border-top-width: 3px;
  border-radius: var(--r-md);
  background: var(--panel);
}

.page-about .about-eco__group--cyan {
  border-top-color: var(--neon-cyan);
}

.page-about .about-eco__group--amber {
  border-top-color: var(--amber);
}

.page-about .about-eco__group--violet {
  border-top-color: var(--electric-violet);
}

.page-about .about-eco__title {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  color: var(--ink);
}

.page-about .about-eco__title .num {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 600;
  letter-spacing: -0.03em;
}

.page-about .about-eco__group--cyan .about-eco__title .num {
  color: var(--neon-cyan);
}

.page-about .about-eco__group--amber .about-eco__title .num {
  color: var(--amber);
}

.page-about .about-eco__group--violet .about-eco__title .num {
  color: var(--electric-violet);
}

.page-about .about-eco__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-muted);
}

.page-about .about-eco__note {
  margin: clamp(24px, 3vw, 36px) 0 0;
  font-size: 15px;
  color: var(--ink-muted);
}

/* ---------- 里程碑 ---------- */

.page-about .about-mile {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  border: 1px solid var(--cool-line);
  border-radius: var(--r-md);
  background: var(--cool-line);
  overflow: hidden;
}

.page-about .about-mile__item {
  display: grid;
  grid-template-columns: 140px minmax(0, 1fr);
  gap: clamp(16px, 3vw, 40px);
  align-items: baseline;
  padding: clamp(18px, 2.4vw, 26px) clamp(20px, 2.6vw, 30px);
  background: var(--panel);
}

.page-about .about-mile__year {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--amber);
}

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

/* ---------- 收尾 ---------- */

.page-about .about-cta {
  padding-block: clamp(60px, 9vw, 120px);
}

.page-about .about-cta__inner {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: start;
}

.page-about .about-cta__title {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 4.4vw, 54px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-about .about-cta__text {
  margin: 0 0 28px;
  max-width: 52ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-muted);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.page-about .about-cta__aside {
  padding: clamp(22px, 3vw, 32px);
  border: 1px solid var(--cool-line);
  border-radius: var(--r-md);
  background: var(--panel);
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-muted);
}

.page-about .about-cta__aside p {
  margin: 0 0 18px;
}

.page-about .about-cta__mail {
  font-family: var(--font-mono);
  color: var(--neon-cyan);
  word-break: break-all;
}

/* ---------- 响应式 ---------- */

@media (max-width: 1080px) {
  .page-about .about-what {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-what__card--c {
    grid-column: 1 / -1;
    margin-top: 0;
  }

  .page-about .about-era-grid,
  .page-about .about-data-grid,
  .page-about .about-team,
  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-about .about-era-figure.media-frame {
    max-width: 420px;
    margin-inline: auto;
  }

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

@media (max-width: 720px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-about .about-what__card--b {
    margin-top: 0;
  }

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

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

  .page-about .about-quality__steps,
  .page-about .about-eco {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-about .about-mile__item {
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-what__card:hover {
    transform: none;
  }

  .page-about * {
    transition-duration: 1ms !important;
  }
}