/* ===== 页面专属：品牌档案 ===== */
.page-about {
  --about-radius-xl: 28px;
  --about-radius-lg: 20px;
  --about-radius-md: 14px;
  --about-line: rgba(10, 46, 92, 0.1);
  position: relative;
  color: var(--ink);
  background:
    radial-gradient(circle at 90% 6%, rgba(10, 46, 92, 0.05) 0, transparent 320px),
    linear-gradient(180deg, var(--white) 0%, var(--bg-mist) 100%);
  padding: calc(var(--header-h) + clamp(20px, 4vw, 56px)) 0 0;
  overflow-x: hidden;
}

.page-about__wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: flex;
  flex-direction: column;
  gap: clamp(44px, 7vw, 96px);
}

/* 面包屑 */
.page-about .page-about__crumbs {
  margin: 0 0 -36px;
  font-size: 14px;
  color: var(--ink-soft);
}
.page-about .page-about__crumbs a {
  color: var(--brand-royal);
  text-decoration: none;
  transition: color 0.25s var(--ease);
}
.page-about .page-about__crumbs a:hover {
  color: var(--accent);
}
.page-about .site-crumbs__sep {
  margin: 0 8px;
  color: var(--accent-gold);
}

/* ===== 首屏 Hero ===== */
.page-about__hero {
  position: relative;
}
.page-about__hero::before {
  content: "";
  position: absolute;
  inset: -40px -40px auto -40px;
  height: 420px;
  background:
    linear-gradient(rgba(10, 46, 92, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(10, 46, 92, 0.045) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
  z-index: 0;
}
.page-about__hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
}
.page-about__hero-copy {
  max-width: 660px;
}
.page-about__hero-copy .section-label {
  margin-bottom: 16px;
}
.page-about__hero h1 {
  font-family: var(--font-title);
  font-weight: 800;
  font-size: clamp(32px, 5.2vw, 48px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--brand-deep);
  margin: 0 0 20px;
}
.page-about__hero-lead {
  font-family: var(--font-body);
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.7;
  color: var(--ink);
  margin: 0 0 12px;
}
.page-about__hero-sub {
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
  margin: 0 0 28px;
}
.page-about__hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.page-about__hero-figure {
  position: relative;
  margin: 0;
  background: linear-gradient(135deg, var(--brand-deep), var(--brand-royal) 55%, var(--brand-glow));
  border-radius: var(--about-radius-xl);
  padding: 20px;
  box-shadow: var(--shadow);
}
.page-about__hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: calc(var(--about-radius-xl) - 12px);
}
.page-about__hero-float {
  position: static;
  margin-top: -28px;
  margin-left: 24px;
  margin-right: auto;
  max-width: 170px;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
  padding: 14px 18px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.page-about__hero-float-num {
  font-family: var(--font-title);
  font-size: 22px;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
}
.page-about__hero-float-label {
  font-size: 13px;
  line-height: 1.4;
  color: var(--ink-soft);
}

/* ===== 区块公共标题 ===== */
.page-about__section-head {
  max-width: 720px;
  margin-bottom: 28px;
}
.page-about__section-head .section-label {
  margin-bottom: 12px;
}
.page-about__section-head h2 {
  font-family: var(--font-title);
  font-size: clamp(26px, 3.4vw, 36px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--brand-deep);
  margin: 0 0 14px;
}
.page-about__section-head p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink-soft);
  margin: 0;
}

/* ===== 发展历程 · 时间线 ===== */
.page-about__timeline {
  position: relative;
}
.page-about__timeline::before {
  content: "";
  position: absolute;
  left: 40px;
  top: 24px;
  bottom: 24px;
  width: 2px;
  transform: translateX(-50%);
  background: linear-gradient(180deg, var(--accent-gold) 0%, var(--brand-royal) 65%, rgba(10, 46, 92, 0.04) 100%);
}
.page-about__milestone {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 20px;
  position: relative;
  padding-bottom: 24px;
}
.page-about__milestone summary {
  grid-column: 1;
  grid-row: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding-top: 6px;
  list-style: none;
  cursor: pointer;
  color: inherit;
}
.page-about__milestone summary::-webkit-details-marker {
  display: none;
}
.page-about__milestone summary::marker {
  content: "";
  display: none;
}
.page-about__milestone-year {
  font-family: var(--font-title);
  font-size: 15px;
  font-weight: 800;
  color: var(--brand-deep);
  background: var(--info-blue);
  border-radius: 999px;
  padding: 6px 12px;
  line-height: 1;
  white-space: nowrap;
  transition: background 0.25s var(--ease), color 0.25s var(--ease);
}
.page-about__milestone summary:hover .page-about__milestone-year {
  background: var(--accent-gold);
  color: var(--brand-deep);
}
.page-about__milestone-dot {
  display: block;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent-gold);
  border: 3px solid var(--white);
  box-shadow: 0 0 0 2px var(--accent-gold);
}
.page-about__milestone-body {
  grid-column: 2;
  grid-row: 1;
  background: var(--white);
  border: 1px solid var(--about-line);
  border-radius: var(--about-radius-lg);
  padding: 20px;
  box-shadow: 0 4px 16px rgba(10, 46, 92, 0.06);
}
.page-about__milestone-title {
  font-family: var(--font-title);
  font-size: 20px;
  font-weight: 800;
  color: var(--brand-deep);
  margin: 0 0 10px;
}
.page-about__milestone-body p {
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ink-soft);
  margin: 0 0 10px;
}
.page-about__milestone-body p:last-child {
  margin-bottom: 0;
}
.page-about__milestone-body img {
  margin-top: 14px;
  width: 100%;
  max-width: 300px;
  height: auto;
  border-radius: var(--radius-sm);
  display: block;
}

/* ===== 服务规模 ===== */
.page-about__scale-panel {
  background:
    radial-gradient(circle at 88% 18%, rgba(59, 123, 191, 0.35) 0, transparent 220px),
    linear-gradient(135deg, var(--brand-deep), var(--brand-royal) 70%);
  border-radius: var(--about-radius-xl);
  padding: clamp(28px, 4vw, 48px);
  color: var(--white);
  box-shadow: var(--shadow);
}
.page-about__scale-head .section-label {
  color: var(--accent-gold);
  border-color: rgba(245, 185, 66, 0.6);
  margin-bottom: 12px;
}
.page-about__scale-head h2 {
  font-size: clamp(26px, 3.4vw, 36px);
  font-weight: 800;
  line-height: 1.2;
  margin: 0 0 12px;
}
.page-about__scale-head p {
  font-size: 15px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.82);
  margin: 0 0 28px;
}
.page-about__stat-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.page-about__stat {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--about-radius-md);
  padding: 18px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  backdrop-filter: blur(4px);
}
.page-about__stat-num {
  font-family: var(--font-title);
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--accent-gold);
  line-height: 1;
}
.page-about__stat-label {
  font-size: 13px;
  line-height: 1.4;
  color: rgba(255, 255, 255, 0.78);
}
.page-about__scale-note {
  margin-top: 24px;
  font-size: 13.5px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.62);
}

/* ===== 团队与资质 ===== */
.page-about__team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}
.page-about__team-card {
  position: relative;
  background: var(--white);
  border-radius: var(--about-radius-lg);
  padding: 24px;
  border: 1px solid var(--about-line);
  box-shadow: 0 4px 16px rgba(10, 46, 92, 0.05);
  overflow: hidden;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.page-about__team-card::before {
  content: "";
  position: absolute;
  inset: 0 auto auto 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-gold), var(--accent) 40%, transparent);
}
.page-about__team-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 32px rgba(10, 46, 92, 0.12);
}
.page-about__team-code {
  font-family: var(--font-title);
  font-size: 13px;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: 0.08em;
  display: inline-block;
  margin-bottom: 10px;
}
.page-about__team-name {
  font-size: 20px;
  font-weight: 800;
  color: var(--brand-deep);
  margin: 0 0 10px;
}
.page-about__team-desc {
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--ink-soft);
  margin: 0 0 14px;
}
.page-about__team-extra {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.page-about__team-extra span {
  font-size: 12.5px;
  background: var(--info-blue);
  color: var(--brand-deep);
  border-radius: 999px;
  padding: 5px 10px;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), background 0.3s var(--ease);
}
.page-about__team-card:hover .page-about__team-extra span {
  transform: translateY(-2px);
  background: #E3EEF7;
  box-shadow: 0 6px 12px rgba(10, 46, 92, 0.1);
}
.page-about__team-figure {
  margin: 26px 0 0;
  max-width: 260px;
}
.page-about__team-figure img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  display: block;
}

/* ===== 合作生态 ===== */
.page-about__partners-glass {
  background: var(--glass);
  border: 1px solid rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(8px);
  border-radius: var(--about-radius-xl);
  padding: clamp(24px, 4vw, 44px);
  box-shadow: var(--shadow);
}
.page-about__partners-glass .section-label {
  margin-bottom: 12px;
}
.page-about__partners-glass h2 {
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 800;
  line-height: 1.25;
  color: var(--brand-deep);
  margin: 0 0 14px;
}
.page-about__partners-glass > p {
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
  max-width: 640px;
  margin: 0;
}
.page-about__partner-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 22px 0;
}
.page-about__partner-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--white);
  border: 1px solid rgba(10, 46, 92, 0.12);
  border-radius: 999px;
  padding: 7px 14px;
  font-size: 13.5px;
  color: var(--brand-royal);
  font-weight: 600;
}
.page-about__partner-item::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-gold);
}
.page-about__partners-note {
  font-size: 14px;
}
.page-about__partners-note a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
  transition: text-decoration 0.25s var(--ease);
}
.page-about__partners-note a:hover {
  text-decoration: underline;
}

/* ===== 底部联系 CTA ===== */
.page-about__contact-cta {
  position: relative;
  background: linear-gradient(135deg, var(--brand-deep) 0%, var(--brand-royal) 100%);
  border-radius: var(--about-radius-xl);
  padding: clamp(28px, 5vw, 56px);
  color: var(--white);
  text-align: center;
  overflow: hidden;
  box-shadow: var(--shadow);
}
.page-about__contact-cta::before {
  content: "";
  position: absolute;
  right: -40px;
  top: -60px;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  border: 24px solid rgba(245, 185, 66, 0.12);
}
.page-about__contact-cta h2 {
  font-size: clamp(24px, 3.2vw, 34px);
  font-weight: 800;
  margin: 0 0 10px;
}
.page-about__contact-cta p {
  font-size: 15px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.85);
  margin: 0 auto 24px;
  max-width: 480px;
}
.page-about__contact-cta .btn {
  position: relative;
  z-index: 1;
}

/* ===== 响应式：平板及以上 ===== */
@media (min-width: 768px) {
  .page-about__hero-inner {
    grid-template-columns: 1.15fr 0.85fr;
  }
  .page-about__hero-figure img {
    aspect-ratio: 4 / 3;
  }
  .page-about__hero-float {
    position: absolute;
    left: -18px;
    bottom: 28px;
    margin: 0;
  }
  .page-about__timeline::before {
    left: 48px;
  }
  .page-about__milestone {
    grid-template-columns: 96px 1fr;
    gap: 28px;
  }
  .page-about__milestone:last-child {
    padding-bottom: 0;
  }
  .page-about__stat-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-about__team-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
}

/* ===== 响应式：桌面端 ===== */
@media (min-width: 1024px) {
  .page-about__stat-grid {
    grid-template-columns: repeat(6, 1fr);
  }
  .page-about__team-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  .page-about__team-card {
    padding: 20px;
  }
}