.page-about {
  --about-grid-line: rgba(57, 255, 20, 0.05);
  --about-snow-dot: rgba(245, 240, 230, 0.06);
  --about-panel-edge: rgba(107, 123, 140, 0.32);
  color: var(--text-muted);
  background:
    radial-gradient(circle at 18% 12%, rgba(57, 255, 20, 0.04), transparent 38%),
    radial-gradient(circle at 82% 58%, rgba(255, 107, 53, 0.04), transparent 42%),
    var(--bg-primary);
  line-height: 1.75;
  overflow-x: hidden;
}

/* ---------- Hero ---------- */
.about-hero {
  position: relative;
  padding: 30px 0 64px;
  overflow: hidden;
}
.about-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--about-grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--about-grid-line) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 72%);
  pointer-events: none;
}
.about-hero::after {
  content: '';
  position: absolute;
  top: -140px;
  right: -100px;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(57, 255, 20, 0.12), transparent 68%);
  pointer-events: none;
}
.about-hero-inner {
  position: relative;
  z-index: 1;
}
.about-hero-grid {
  display: grid;
  gap: 32px;
  margin-top: 28px;
}
.about-hero-copy .section-tag {
  display: inline-block;
  margin-bottom: 18px;
}
.about-hero-copy h1 {
  color: var(--text-white);
  font-family: var(--font-display);
  font-size: clamp(28px, 6vw, 46px);
  line-height: 1.22;
  letter-spacing: 0.01em;
  max-width: 720px;
  margin: 0 0 18px;
}
.about-hero-lead {
  color: var(--text-light);
  font-size: 16px;
  line-height: 1.8;
  max-width: 560px;
  margin: 0;
}
.about-hero-side {
  min-width: 0;
}
.about-hero-float {
  background: var(--bg-panel);
  border: 1px solid var(--about-panel-edge);
  border-radius: var(--radius-xl);
  padding: 22px 18px;
  backdrop-filter: blur(6px);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.28);
}
.about-float-grid {
  display: grid;
  gap: 12px;
}
.float-item {
  display: flex;
  flex-direction: column;
  padding: 14px 16px;
  border-radius: var(--radius-md);
  background: rgba(13, 42, 74, 0.5);
  border-left: 3px solid var(--accent-green);
}
.float-label {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--support-gray);
  margin-bottom: 4px;
}
.float-value {
  color: var(--accent-green);
  font-size: 30px;
  font-weight: 700;
  line-height: 1.1;
}
.float-unit {
  color: var(--text-muted);
  font-size: 13px;
  margin-top: 4px;
}

/* ---------- 通用章节 ---------- */
.about-section {
  position: relative;
  padding: 56px 0;
}
.about-section-head {
  margin-bottom: 40px;
}
.about-section-head h2 {
  color: var(--text-white);
  font-family: var(--font-display);
  font-size: clamp(22px, 4vw, 34px);
  line-height: 1.3;
  margin: 10px 0 0;
  max-width: 680px;
}
.about-section-head .section-tag {
  display: inline-block;
}

/* ---------- 品牌理念 ---------- */
.about-philosophy {
  background:
    radial-gradient(circle at 22% 28%, var(--about-snow-dot) 0 1px, transparent 1.6px),
    radial-gradient(circle at 68% 64%, rgba(245, 240, 230, 0.04) 0 1px, transparent 1.6px);
  background-size: 180px 180px, 260px 260px;
}
.philosophy-grid {
  display: grid;
  gap: 28px;
}
.philosophy-visual,
.philosophy-content {
  background: var(--bg-panel);
  border: 1px solid var(--about-panel-edge);
  border-radius: var(--radius-xl);
  padding: 20px;
}
.philosophy-frame,
.ecosystem-frame {
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.philosophy-frame img,
.ecosystem-frame img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}
.philosophy-caption,
.ecosystem-caption {
  color: var(--support-gray);
  font-size: 12px;
  letter-spacing: 0.1em;
  margin: 14px 2px 0;
}
.philosophy-content {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.philosophy-quote {
  color: var(--accent-green);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.7;
  padding: 0 0 4px 14px;
  border-left: 3px solid var(--accent-green);
  margin: 0;
}
.philosophy-lead {
  color: var(--text-light);
  font-size: 16px;
  margin: 0;
}
.philosophy-content p {
  margin: 0;
}
.philosophy-points {
  list-style: none;
  margin: 4px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.philosophy-points li {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-light);
  font-size: 15px;
  border-radius: var(--radius-md);
  background: rgba(11, 29, 58, 0.6);
  padding: 10px 14px;
}
.point-marker {
  color: var(--accent-orange);
  font-size: 13px;
  font-weight: 700;
  min-width: 24px;
}

/* ---------- 发展历程 ---------- */
.about-journey {
  background: var(--bg-secondary);
}
.about-journey::before {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 48px;
  background: linear-gradient(to top right, transparent 48%, var(--bg-secondary) 50%, var(--bg-secondary) 100%);
  opacity: 0;
}
.journey-wrap {
  position: relative;
}
.journey-bg {
  margin-bottom: 32px;
}
.journey-frame {
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: linear-gradient(135deg, rgba(57, 255, 20, 0.08), rgba(255, 107, 53, 0.06));
}
.journey-frame img {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 180px;
  max-height: 260px;
  object-fit: cover;
  opacity: 0.8;
}
.timeline {
  list-style: none;
  position: relative;
  margin: 0;
  padding: 0;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 27px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent-green), rgba(57, 255, 20, 0.18), var(--accent-orange));
}
.timeline-item {
  position: relative;
  padding: 0 0 40px 70px;
}
.timeline-item:last-child {
  padding-bottom: 4px;
}
.timeline-node {
  position: absolute;
  left: 0;
  top: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 54px;
  height: 30px;
  padding: 0 12px;
  border-radius: 999px;
  border: 1px solid var(--accent-green);
  background: rgba(57, 255, 20, 0.08);
  color: var(--accent-green);
  font-size: 13px;
  font-weight: 700;
  cursor: default;
  transition: box-shadow var(--transition), background var(--transition);
}
.timeline-node:hover,
.timeline-node:focus-visible {
  background: rgba(57, 255, 20, 0.16);
  box-shadow: var(--glow-green);
  outline: none;
}
.timeline-tip {
  position: absolute;
  left: calc(100% + 10px);
  top: 50%;
  transform: translateY(-50%);
  padding: 4px 10px;
  background: var(--bg-panel);
  border: 1px solid var(--accent-green);
  border-radius: 999px;
  color: var(--accent-green);
  font-size: 12px;
  line-height: 1.4;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition);
  z-index: 3;
}
.timeline-node:hover .timeline-tip,
.timeline-node:focus-visible .timeline-tip {
  opacity: 1;
}
.timeline-card {
  border-radius: var(--radius-lg);
  border: 1px solid var(--about-panel-edge);
  background: rgba(11, 29, 58, 0.72);
  padding: 18px 20px;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.timeline-card:hover {
  border-color: rgba(57, 255, 20, 0.45);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.18);
}
.timeline-card h3 {
  color: var(--text-white);
  font-family: var(--font-display);
  font-size: 18px;
  margin: 0 0 8px;
}
.timeline-card p {
  color: var(--text-muted);
  font-size: 15px;
  margin: 0;
  line-height: 1.7;
}

/* ---------- 团队与生态 ---------- */
.about-ecosystem {
  background:
    radial-gradient(circle at 78% 20%, var(--about-snow-dot) 0 1px, transparent 1.6px),
    radial-gradient(circle at 35% 80%, rgba(245, 240, 230, 0.04) 0 1px, transparent 1.6px);
  background-size: 200px 200px, 240px 240px;
}
.ecosystem-grid {
  display: grid;
  gap: 28px;
}
.ecosystem-visual {
  min-width: 0;
}
.ecosystem-frame {
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, rgba(57, 255, 20, 0.06), rgba(255, 107, 53, 0.05));
}
.ecosystem-frame img {
  max-width: 100%;
  display: block;
}
.ecosystem-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.stat-block {
  border: 1px solid var(--about-panel-edge);
  border-radius: var(--radius-lg);
  background: var(--bg-panel);
  padding: 20px 18px;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.stat-block:hover {
  border-color: rgba(57, 255, 20, 0.45);
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.2);
}
.stat-block-accent {
  border-color: rgba(255, 107, 53, 0.4);
}
.stat-num {
  display: block;
  color: var(--accent-green);
  font-size: 28px;
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: 8px;
}
.stat-block-accent .stat-num {
  color: var(--accent-orange);
}
.stat-label {
  color: var(--text-light);
  font-size: 14px;
  line-height: 1.5;
}
.ecosystem-bottom {
  display: grid;
  gap: 16px;
  margin-top: 40px;
}
.eco-card {
  border-radius: var(--radius-lg);
  border: 1px solid var(--about-panel-edge);
  background: rgba(13, 42, 74, 0.55);
  padding: 22px 22px;
}
.eco-card h3 {
  color: var(--text-white);
  font-family: var(--font-display);
  font-size: 16px;
  margin: 0 0 8px;
}
.eco-card p {
  color: var(--text-muted);
  font-size: 15px;
  margin: 0;
  line-height: 1.7;
}

/* ---------- CTA ---------- */
.about-cta {
  padding-bottom: 72px;
}
.cta-panel {
  position: relative;
  padding: 40px 26px 40px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  background:
    linear-gradient(135deg, rgba(57, 255, 20, 0.06), transparent 36%),
    linear-gradient(315deg, rgba(255, 107, 53, 0.08), transparent 44%),
    var(--bg-secondary);
  clip-path: polygon(0 24px, 24px 0, 100% 0, 100% calc(100% - 24px), calc(100% - 24px) 100%, 0 100%);
}
.cta-panel .section-tag {
  display: inline-block;
  margin-bottom: 10px;
}
.cta-panel h2 {
  color: var(--text-white);
  font-family: var(--font-display);
  font-size: clamp(22px, 4vw, 32px);
  line-height: 1.3;
  margin: 0 0 12px;
}
.cta-panel p {
  color: var(--text-muted);
  font-size: 15px;
  margin: 0 0 24px;
  max-width: 520px;
}
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.cta-actions .btn {
  text-decoration: none;
}
.cta-actions .btn-outline:hover {
  border-color: rgba(255, 107, 53, 0.6);
  box-shadow: var(--glow-orange);
}

/* ---------- 滚动渐入支持 ---------- */
.page-about [data-visible] {
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.page-about [data-visible="true"] {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 768px) {
  .about-hero {
    padding: 44px 0 88px;
  }
  .about-hero-grid {
    grid-template-columns: 1fr 320px;
    align-items: end;
    gap: 48px;
    margin-top: 36px;
  }
  .about-hero-copy h1 {
    margin-bottom: 22px;
  }
  .about-hero-lead {
    font-size: 17px;
  }
  .about-float-grid {
    grid-template-columns: 1fr;
  }
  .about-section {
    padding: 76px 0;
  }
  .about-section-head {
    margin-bottom: 52px;
  }
  .philosophy-grid {
    grid-template-columns: 1fr 1.15fr;
    gap: 32px;
  }
  .philosophy-visual,
  .philosophy-content {
    padding: 24px;
  }
  .journey-bg {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 40%;
    opacity: 0.5;
    margin: 0;
  }
  .journey-frame img {
    height: 100%;
    max-height: 420px;
  }
  .timeline {
    width: 62%;
  }
  .timeline-tip {
    left: calc(100% + 10px);
  }
  .ecosystem-grid {
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 32px;
  }
  .ecosystem-stats {
    grid-template-columns: repeat(2, 1fr);
  }
  .ecosystem-bottom {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 52px;
  }
  .cta-panel {
    padding: 56px 48px;
  }
  .cta-actions {
    gap: 16px;
  }
}

/* ---------- 桌面端 ---------- */
@media (min-width: 1024px) {
  .about-hero-float {
    padding: 28px 24px;
  }
  .about-float-grid {
    grid-template-columns: 1fr;
  }
  .journey-bg {
    width: 34%;
  }
  .journey-frame img {
    max-height: 460px;
  }
  .timeline {
    width: 58%;
  }
  .journey-wrap {
    padding-right: 4%;
  }
  .philosophy-frame img {
    max-height: 360px;
  }
  .ecosystem-frame img {
    max-height: 380px;
  }
}