/* ==========================================================
   PAGE — ABOUT
   作用域：.page-about
   ========================================================== */

.page-about {
  --about-rail: 28px;
  --about-orange-glow: rgba(255, 90, 54, 0.38);
  --about-purple-glow: rgba(139, 92, 246, 0.32);
  --about-panel-border: rgba(255, 255, 255, 0.14);
  display: block;
  overflow-x: clip;
}

/* ---------- 首屏：框景 + 深色渐变 ---------- */

.page-about__hero {
  margin-bottom: 24px;
  position: relative;
  color: #f4f6fa;
  background:
    radial-gradient(1100px 480px at 88% -10%, rgba(139, 92, 246, 0.42), transparent 62%),
    radial-gradient(720px 380px at -5% 118%, rgba(255, 90, 54, 0.2), transparent 55%),
    linear-gradient(135deg, #0b1d3a 0%, #1a1540 72%, #211644 100%);
  overflow: hidden;
}

.page-about__hero-inner {
  padding: 28px 20px 36px;
  position: relative;
  z-index: 1;
}

.page-about__hero::after {
  content: "";
  position: absolute;
  inset: 12px;
  border: 1px solid var(--about-panel-border);
  border-radius: 10px;
  pointer-events: none;
}

.page-about__hero-top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 28px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  padding-bottom: 14px;
}

.page-about__hero-code {
  font-family: var(--pg-font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: rgba(244, 246, 250, 0.62);
}

.page-about__hero-body {
  display: grid;
  gap: 28px;
  align-items: center;
}

.page-about__hero-copy .pg-subtitle {
  color: rgba(244, 246, 250, 0.6);
  margin-bottom: 8px;
}

.page-about__hero-copy h1 {
  color: #f4f6fa;
  font-family: var(--pg-font-head);
  font-size: clamp(26px, 5vw, 42px);
  line-height: 1.22;
  letter-spacing: 0.01em;
  margin-bottom: 16px;
}

.page-about__hero-copy .pg-lead {
  color: rgba(244, 246, 250, 0.82);
  max-width: 640px;
  margin-bottom: 24px;
}

.page-about__hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about__hero-panel {
  border: 1px solid var(--about-panel-border);
  border-radius: var(--pg-radius);
  background: rgba(255, 255, 255, 0.07);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  padding: 20px 16px;
}

.page-about__stat-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.page-about__stat-item {
  display: flex;
  flex-direction: column;
  padding: 14px 12px;
  border-radius: var(--pg-radius-s);
  background: rgba(11, 29, 58, 0.38);
  border-left: 3px solid var(--pg-orange);
}

.page-about__stat-num {
  font-family: var(--pg-font-mono);
  font-size: clamp(28px, 6vw, 40px);
  font-weight: 700;
  color: #ffffff;
  line-height: 1;
  letter-spacing: -0.02em;
}

.page-about__stat-unit {
  font-family: var(--pg-font-mono);
  font-size: 14px;
  color: var(--pg-orange);
  margin-left: 2px;
}

.page-about__stat-label {
  font-size: 13px;
  color: rgba(244, 246, 250, 0.64);
  margin-top: 8px;
}

/* ---------- 通用章节标题 ---------- */

.page-about .page-about__section-head {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 28px;
}

.page-about .page-about__section-head .pg-title {
  margin: 0 0 4px;
  font-size: clamp(24px, 4vw, 34px);
  line-height: 1.2;
}

.page-about .page-about__section-head .pg-subtitle {
  margin: 0;
}

.page-about .page-about__section-head--light .pg-title {
  color: #f4f6fa;
}

.page-about .page-about__section-head--light .pg-subtitle {
  color: rgba(244, 246, 250, 0.56);
}

.page-about .page-about__index-light {
  color: rgba(255, 255, 255, 0.2);
}

/* ---------- 01 品牌定位 ---------- */

.page-about .page-about__position {
  margin-bottom: 24px;
}

.page-about__position-grid {
  display: grid;
  gap: 28px;
}

.page-about__position-copy p {
  color: var(--pg-text);
  font-size: 15px;
  line-height: 1.85;
  margin: 0 0 14px;
}

.page-about__position-copy .page-about__legal-links {
  margin-top: 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.page-about__legal-links a {
  color: var(--pg-purple);
  font-weight: 600;
  text-decoration: none;
}

.page-about__legal-links a:hover {
  color: var(--pg-orange);
}

.page-about__position-meta {
  display: grid;
  gap: 12px;
}

.page-about__meta-item {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  padding: 14px 16px;
  border-radius: var(--pg-radius-s);
  background: #f4f6fa;
  border: 1px solid rgba(11, 29, 58, 0.08);
  font-size: 14px;
  color: var(--pg-text);
}

/* ---------- 02 发展历程 ---------- */

.page-about__timeline-section {
  background:
    radial-gradient(900px 420px at 92% 8%, rgba(139, 92, 246, 0.28), transparent 62%),
    linear-gradient(150deg, #0b1d3a 0%, #1a1540 65%, #251a47 100%);
  border-radius: var(--pg-radius);
  padding: 52px 18px;
  margin-bottom: 24px;
  overflow: hidden;
}

.page-about__timeline-inner {
  max-width: 1160px;
  margin: 0 auto;
  position: relative;
}

.page-about__timeline {
  position: relative;
  margin-top: 32px;
}

.page-about__timeline-svg {
  display: none;
}

.page-about__timeline-list {
  position: relative;
  margin: 0;
  padding: 0 0 0 34px;
  list-style: none;
  display: grid;
  gap: 30px;
}

.page-about__timeline-list::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(
    180deg,
    rgba(255, 90, 54, 0.6) 0%,
    rgba(139, 92, 246, 0.5) 50%,
    rgba(139, 92, 246, 0.12) 100%
  );
}

.page-about__milestone {
  position: relative;
  display: grid;
  gap: 8px;
}

.page-about__milestone::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 18px;
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: var(--pg-orange);
  box-shadow:
    0 0 0 3px rgba(255, 90, 54, 0.2),
    0 0 18px rgba(255, 90, 54, 0.55);
}

.page-about__milestone-year {
  font-family: var(--pg-font-mono);
  font-size: 22px;
  font-weight: 700;
  color: var(--pg-orange);
  line-height: 1.2;
  letter-spacing: 0.03em;
}

.page-about__milestone-card {
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid var(--about-panel-border);
  border-radius: var(--pg-radius-s);
  padding: 16px 18px;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.page-about__milestone-card h3 {
  color: #f4f6fa;
  font-family: var(--pg-font-head);
  font-size: 18px;
  line-height: 1.4;
  margin: 0 0 8px;
}

.page-about__milestone-card p {
  color: rgba(244, 246, 250, 0.74);
  font-size: 14px;
  line-height: 1.72;
  margin: 0 0 8px;
}

.page-about__timeline-figure {
  margin: 42px 0 0;
  border-radius: var(--pg-radius);
  overflow: hidden;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--about-panel-border);
}

.page-about__timeline-figure img,
.page-about__cert-figure img,
.page-about__team-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about__timeline-figure figcaption,
.page-about__cert-figure span,
.page-about__team-figure figcaption {
  display: block;
  padding: 10px 14px;
  color: rgba(244, 246, 250, 0.58);
}

/* ---------- 03 资质与认证 ---------- */

.page-about .page-about__certs {
  margin-bottom: 24px;
}

.page-about__certs-content {
  display: grid;
  gap: 26px;
  align-items: center;
}

.page-about__certs-gallery {
  display: grid;
  gap: 14px;
}

.page-about__cert-card {
  background: #ffffff;
  border: 1px solid rgba(11, 29, 58, 0.08);
  border-radius: var(--pg-radius);
  box-shadow: var(--pg-shadow);
  padding: 20px 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: transform 0.3s var(--pg-ease), box-shadow 0.3s var(--pg-ease);
}

.page-about__cert-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--pg-shadow-lg);
}

.page-about__cert-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 4px;
}

.page-about__cert-icon svg {
  width: 100%;
  height: 100%;
  display: block;
}

.page-about__cert-card h3 {
  font-family: var(--pg-font-head);
  font-size: 18px;
  color: var(--pg-text);
  margin: 0;
}

.page-about__cert-card p {
  font-size: 13px;
  color: var(--pg-gray);
  margin: 0;
  line-height: 1.6;
}

.page-about__cert-figure {
  margin: 0;
  border-radius: var(--pg-radius);
  overflow: hidden;
  background: #ffffff;
  border: 1px solid rgba(11, 29, 58, 0.08);
}

/* ---------- 04 团队与办公 ---------- */

.page-about__team-section {
  background:
    radial-gradient(800px 420px at 0% 100%, rgba(255, 90, 54, 0.18), transparent 56%),
    linear-gradient(145deg, #0b1d3a 0%, #12294d 62%, #1a1540 100%);
  border-radius: var(--pg-radius);
  padding: 52px 18px;
  margin-bottom: 24px;
  overflow: hidden;
}

.page-about__team-inner {
  max-width: 1160px;
  margin: 0 auto;
}

.page-about__team-grid {
  display: grid;
  gap: 28px;
  align-items: stretch;
}

.page-about__team-copy {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.page-about__team-copy .page-about__team-lede {
  color: #f4f6fa;
  font-family: var(--pg-font-head);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.5;
  margin: 0;
}

.page-about__team-copy p {
  color: rgba(244, 246, 250, 0.76);
  font-size: 14px;
  line-height: 1.8;
  margin: 0;
}

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

.page-about__team-list li {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 14px;
  color: rgba(244, 246, 250, 0.86);
  padding: 10px 14px;
  border-radius: var(--pg-radius-s);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--about-panel-border);
}

.page-about__team-note {
  font-size: 13px;
  color: rgba(244, 246, 250, 0.58);
}

.page-about__team-figure {
  margin: 0;
  border-radius: var(--pg-radius);
  overflow: hidden;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--about-panel-border);
  display: flex;
  flex-direction: column;
}

/* ---------- 05 联系我们 ---------- */

.page-about .page-about__contact-cta {
  margin-bottom: 24px;
}

.page-about__contact-panel {
  display: grid;
  gap: 20px;
  background: linear-gradient(135deg, #f4f6fa 0%, #ffffff 72%);
  border: 1px solid rgba(11, 29, 58, 0.08);
  border-radius: var(--pg-radius);
  padding: 24px 20px;
  box-shadow: var(--pg-shadow);
}

.page-about__contact-copy p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--pg-text);
  margin: 0 0 12px;
}

.page-about__contact-copy strong {
  color: var(--pg-purple);
  font-family: var(--pg-font-mono);
  font-weight: 700;
}

.page-about__contact-list {
  list-style: none;
  margin: 0 0 14px;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about__contact-list li {
  font-family: var(--pg-font-mono);
  font-size: 13px;
  color: var(--pg-text);
  padding-left: 18px;
  position: relative;
}

.page-about__contact-list li::before {
  content: "▹";
  position: absolute;
  left: 0;
  color: var(--pg-orange);
}

.page-about__contact-note {
  font-size: 13px;
  color: var(--pg-gray);
}

.page-about__contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

/* ---------- 媒体查询：桌面端 ---------- */

@media (min-width: 720px) {
  .page-about__hero-inner {
    padding: 44px 40px 56px;
  }

  .page-about__hero-body {
    grid-template-columns: 1.08fr 0.92fr;
    gap: 40px;
  }

  .page-about__hero-copy h1 {
    font-size: 44px;
    max-width: 680px;
  }

  .page-about__stat-grid {
    gap: 12px;
  }

  .page-about__position-grid {
    grid-template-columns: 1.26fr 0.74fr;
    gap: 40px;
  }

  .page-about__timeline-section,
  .page-about__team-section {
    padding: 64px 32px;
  }

  .page-about__timeline-svg {
    display: block;
    position: absolute;
    top: 0;
    right: 2%;
    width: 30%;
    height: 72%;
    opacity: 0.42;
    pointer-events: none;
  }

  .page-about__timeline-list {
    padding-left: 42px;
  }

  .page-about__timeline-list::before {
    left: 13px;
  }

  .page-about__milestone {
    grid-template-columns: 120px 1fr;
    gap: 24px;
    align-items: start;
  }

  .page-about__milestone::before {
    left: calc(-42px + 13px - 5px);
    top: 22px;
  }

  .page-about__milestone-year {
    text-align: right;
    padding-top: 10px;
    font-size: 24px;
  }

  .page-about__milestone-card {
    padding: 20px 22px;
  }

  .page-about__timeline-figure {
    max-width: 860px;
  }

  .page-about__certs-content {
    grid-template-columns: 1.2fr 0.8fr;
    gap: 32px;
  }

  .page-about__certs-gallery {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }

  .page-about__cert-card {
    padding: 22px 18px;
  }

  .page-about__cert-card h3 {
    font-size: 17px;
  }

  .page-about__team-grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 40px;
    align-items: center;
  }

  .page-about__contact-panel {
    grid-template-columns: 1.3fr 0.7fr;
    gap: 32px;
    padding: 28px 32px;
    align-items: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition: none !important;
    animation: none !important;
    scroll-behavior: auto !important;
  }
}