.page-about {
  background: var(--color-night);
  color: var(--color-fog);
  position: relative;
  overflow: hidden;
}

.page-about .breadcrumb {
  max-width: var(--content-w);
  margin: 0 auto;
  padding: 18px 20px 0;
  font-size: 13px;
  letter-spacing: 0.04em;
}

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

.page-about .breadcrumb li + li::before {
  content: "/";
  color: var(--color-primary);
  margin-right: 8px;
}

.about-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 32px;
  height: 32px;
  margin-right: 8px;
  padding: 0 6px;
  background: var(--gradient-fire);
  color: #ffffff;
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 13px;
  line-height: 1;
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 8px 100%, 0 calc(100% - 8px));
}

.about-section-head {
  margin-bottom: 28px;
}

.about-section-head .kicker {
  margin-bottom: 10px;
}

/* ---- 品牌故事 ---- */
.about-story {
  position: relative;
  padding: 36px 0 52px;
}

.about-story::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 85% 10%, rgba(255, 106, 0, 0.14), transparent 60%),
    linear-gradient(135deg, transparent 0%, transparent 78%, rgba(0, 180, 216, 0.06) 78%, rgba(0, 180, 216, 0.06) 100%);
  pointer-events: none;
}

.about-story-grid {
  position: relative;
  display: grid;
  gap: 30px;
}

.about-lead {
  margin: 18px 0 14px;
  font-size: 17px;
  line-height: 1.7;
  font-weight: 600;
  color: var(--color-fog);
  max-width: 640px;
}

.about-story-text p {
  margin: 0 0 14px;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(240, 240, 245, 0.82);
  max-width: 640px;
}

.about-story-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.about-inpage {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  margin-top: 26px;
  padding-top: 18px;
  border-top: 1px solid rgba(192, 192, 192, 0.22);
  font-size: 13px;
}

.about-inpage a {
  color: var(--color-silver);
  text-decoration: none;
  border-bottom: 1px dashed rgba(192, 192, 192, 0.4);
  transition: color 0.22s ease, border-color 0.22s ease;
}

.about-inpage a:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.about-story-facts {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin: 0;
}

.about-fact-card {
  position: relative;
  padding: 18px 16px;
  background: var(--color-slate);
  border: 1px solid rgba(192, 192, 192, 0.14);
  overflow: hidden;
}

.about-fact-card::after {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  bottom: 12px;
  width: 3px;
  background: var(--color-primary);
}

.about-fact-card dt {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--color-silver);
  margin-bottom: 6px;
}

.about-fact-card dd {
  margin: 0;
  font-family: var(--font-data);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--color-fog);
}

/* ---- 数据能力 ---- */
.about-capability {
  padding: 52px 0 44px;
}

.about-capability-map {
  margin: 0 0 26px;
}

.about-capability-map img {
  width: 100%;
  height: auto;
  display: block;
}

.about-metric-grid {
  display: grid;
  gap: 14px;
  margin-bottom: 24px;
}

.about-metric-card {
  padding: 22px 20px;
  background: var(--color-slate);
  border: 1px solid rgba(192, 192, 192, 0.12);
}

.about-metric-num {
  display: block;
  font-family: var(--font-data);
  font-size: 46px;
  line-height: 1;
  font-weight: 700;
  color: var(--color-fog);
  margin-bottom: 4px;
}

.about-metric-card .data-label {
  font-size: 12px;
  letter-spacing: 0.08em;
}

.about-metric-card p {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: rgba(240, 240, 245, 0.74);
}

.about-metric-unit {
  font-size: 0.45em;
  margin-left: 2px;
  color: var(--color-primary);
}

.about-capability-note {
  margin: 0;
  padding: 14px 16px;
  border-left: 3px solid var(--color-cyan);
  font-size: 13px;
  line-height: 1.7;
  color: rgba(240, 240, 245, 0.72);
  background: rgba(0, 180, 216, 0.06);
}

/* ---- 版本时间线 ---- */
.about-timeline {
  padding: 56px 0 60px;
}

.about-timeline-list {
  position: relative;
  list-style: none;
  margin: 0 0 12px;
  padding: 0 0 0 48px;
}

.about-timeline-list::before {
  content: "";
  position: absolute;
  left: 13px;
  top: 6px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-primary) 0%, var(--color-primary) 70%, var(--color-cyan) 100%);
}

.about-timeline-item {
  position: relative;
  padding-bottom: 34px;
}

.about-timeline-item:last-child {
  padding-bottom: 0;
}

.about-timeline-item::before {
  content: "";
  position: absolute;
  left: -43px;
  top: 2px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-night);
  border: 4px solid var(--color-primary);
  box-shadow: 0 0 0 2px rgba(255, 106, 0, 0.35);
}

.about-timeline-item:last-child::before {
  border-color: var(--color-cyan);
  box-shadow: 0 0 0 2px rgba(0, 180, 216, 0.4);
}

.about-timeline-year {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-data);
  font-size: 18px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.02em;
}

.about-timeline-card {
  padding: 18px;
  background: var(--color-slate);
  border: 1px solid rgba(192, 192, 192, 0.12);
}

.about-timeline-card h3 {
  margin: 8px 0 6px;
  font-family: var(--font-head);
  font-size: 20px;
  letter-spacing: 0.01em;
  color: var(--color-fog);
}

.about-timeline-card p {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(240, 240, 245, 0.76);
}

.about-timeline-card .tag-new {
  background: var(--gradient-fire);
  color: #ffffff;
  border: none;
}

.about-timeline-end {
  display: grid;
  gap: 18px;
  margin-top: 20px;
  align-items: center;
}

.about-timeline-curve {
  display: block;
  width: 180px;
  height: 90px;
}

.about-timeline-figure {
  margin: 0;
}

.about-timeline-figure img {
  width: 100%;
  height: auto;
  display: block;
}

/* ---- 团队与运营 ---- */
.about-team {
  padding: 52px 0 48px;
}

.about-team .section-heading,
.about-team .kicker {
  color: var(--color-night);
}

.about-team .section-subhead {
  color: rgba(26, 26, 46, 0.72);
}

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

.about-team-card {
  padding: 22px 20px;
  background: var(--color-fog);
  border: 1px solid rgba(26, 26, 46, 0.12);
}

.about-team-num {
  display: block;
  font-family: var(--font-data);
  font-size: 38px;
  font-weight: 700;
  line-height: 1;
  color: var(--color-primary);
  margin-bottom: 10px;
}

.about-team-card h3 {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-size: 19px;
  color: var(--color-night);
}

.about-team-card p {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(26, 26, 46, 0.72);
}

.about-team-note {
  margin: 24px 0 0;
  padding: 14px 16px;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(26, 26, 46, 0.7);
  background: rgba(255, 106, 0, 0.1);
  border-left: 3px solid var(--color-primary);
}

/* ---- 荣誉与认证 ---- */
.about-honor {
  padding: 52px 0 56px;
}

.about-honor-grid {
  display: grid;
  gap: 28px;
}

.about-honor-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.about-honor-item {
  padding: 20px 18px;
  background: var(--color-slate);
  border: 1px solid rgba(192, 192, 192, 0.12);
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.about-honor-item:hover {
  transform: translateX(4px);
  border-color: var(--color-primary);
}

.about-honor-item .tag {
  display: inline-block;
  margin-bottom: 8px;
  padding: 4px 8px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.06em;
  border: 1px solid rgba(255, 106, 0, 0.35);
  color: var(--color-primary);
  background: rgba(255, 106, 0, 0.12);
}

.about-honor-item h3 {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-size: 19px;
  color: var(--color-fog);
}

.about-honor-item p {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(240, 240, 245, 0.74);
}

.about-honor-figure {
  margin: 0;
  border: 1px solid rgba(192, 192, 192, 0.16);
}

.about-honor-figure img {
  width: 100%;
  height: auto;
  display: block;
}

/* ---- 底部联系条 ---- */
.about-cta {
  padding: 40px 20px;
  background: var(--gradient-fire);
  color: #ffffff;
  text-align: center;
}

.about-cta .content-container {
  max-width: 720px;
}

.about-cta-title {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: 24px;
  line-height: 1.3;
  letter-spacing: 0.01em;
}

.about-cta p {
  margin: 0 0 18px;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.92);
}

.about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.about-cta .btn-primary {
  background: var(--color-night);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.5);
  box-shadow: none;
}

.about-cta .btn-ghost {
  border-color: rgba(255, 255, 255, 0.75);
  color: #ffffff;
}

.about-cta .btn-primary:hover,
.about-cta .btn-ghost:hover {
  color: var(--color-primary);
}

/* ---- 桌面端 ---- */
@media (min-width: 900px) {
  .page-about .breadcrumb {
    padding: 24px 24px 0;
  }

  .about-story {
    padding: 64px 0 72px;
  }

  .about-story-grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    gap: 56px;
    align-items: center;
  }

  .about-fact-card {
    padding: 24px 20px;
  }

  .about-fact-card dd {
    font-size: 34px;
  }

  .about-capability {
    padding: 64px 0 56px;
  }

  .about-metric-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
  }

  .about-metric-num {
    font-size: 54px;
  }

  .about-timeline {
    padding: 72px 0 72px;
  }

  .about-timeline-list {
    padding-left: 56px;
  }

  .about-timeline-list::before {
    left: 17px;
  }

  .about-timeline-item::before {
    left: -46px;
    width: 18px;
    height: 18px;
  }

  .about-timeline-year {
    font-size: 20px;
  }

  .about-timeline-card {
    padding: 22px 24px;
  }

  .about-timeline-end {
    grid-template-columns: 180px minmax(0, 1fr);
    gap: 28px;
  }

  .about-team {
    padding: 64px 0 56px;
  }

  .about-team-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
  }

  .about-honor {
    padding: 64px 0 68px;
  }

  .about-honor-grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr);
    gap: 40px;
    align-items: center;
  }

  .about-cta {
    padding: 52px 20px;
  }

  .about-cta-title {
    font-size: 28px;
  }
}