/* ========== 关于品牌 · page-about 专属样式 ========== */
.page-about {
  --about-title-size: clamp(26px, 4vw, 40px);
  --about-panel-pad: clamp(24px, 5vw, 56px);
}

.page-about .page-about-shell {
  padding-top: 24px;
  padding-bottom: 48px;
}

.page-about .breadcrumb {
  margin-bottom: 20px;
}

/* ---------- 堆叠面板通用 ---------- */
.page-about .about-panel {
  position: relative;
  padding: 24px 20px;
  margin-bottom: 24px;
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.32);
}

.page-about .about-hed-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.page-about .about-panel-tag {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.12em;
}

.page-about .section-kicker {
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-blue);
  margin-bottom: 8px;
}

.page-about .about-hed-copy {
  margin-bottom: 22px;
}

.page-about .about-hed-copy .section-title {
  font-size: var(--about-title-size);
  line-height: 1.2;
  margin: 0;
}

/* ---------- 01 品牌DNA ---------- */
.page-about .about-hero {
  background:
    radial-gradient(ellipse 70% 50% at 88% 8%, rgba(0, 224, 255, 0.16), transparent 60%),
    linear-gradient(135deg, rgba(10, 14, 39, 0.98), rgba(15, 31, 20, 0.94));
  border-color: rgba(0, 224, 255, 0.24);
}

.page-about .hero-grid {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.page-about .hero-title {
  font-size: clamp(30px, 6vw, 62px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin-bottom: 18px;
}

.page-about .hero-lead {
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-primary);
  max-width: 56ch;
  margin-bottom: 14px;
}

.page-about .hero-desc {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-secondary);
  max-width: 58ch;
  margin-bottom: 24px;
}

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

.page-about .hero-media {
  margin: 0;
}

/* ---------- 媒体图片填充 ---------- */
.page-about .media-frame img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

/* ---------- 02 关键数据 ---------- */
.page-about .stats-panel {
  background:
    linear-gradient(160deg, rgba(15, 31, 20, 0.92), rgba(10, 14, 39, 0.9));
  border-color: rgba(198, 255, 0, 0.2);
}

.page-about .stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.page-about .stat-cell {
  padding: 22px 14px;
  text-align: center;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  transition: border-color 0.2s ease, background-color 0.2s ease, transform 0.2s ease;
}

.page-about .stat-cell:hover {
  border-color: var(--accent-green);
  background: rgba(198, 255, 0, 0.06);
  transform: translateY(-2px);
}

.page-about .stat-num {
  display: block;
  font-family: var(--font-data);
  font-size: clamp(30px, 5vw, 42px);
  font-weight: 700;
  line-height: 1.2;
  color: var(--accent-green);
  margin-bottom: 6px;
}

.page-about .stat-label {
  display: block;
  font-family: var(--font-body);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
}

.page-about .stats-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 16px;
  margin-top: 20px;
  padding: 18px 20px;
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.02);
  border-top: 1px solid var(--border-light);
  border-right: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
  border-left: 3px solid var(--accent-green);
}

.page-about .stats-foot-num {
  font-family: var(--font-data);
  font-size: 20px;
  font-weight: 700;
  color: var(--accent-green);
}

.page-about .stats-foot-divider {
  width: 1px;
  height: 20px;
  background: var(--border-light);
}

.page-about .stats-media {
  margin-top: 28px;
  max-width: 960px;
  margin-left: auto;
  margin-right: auto;
}

/* ---------- 03 发展历程 ---------- */
.page-about .history-panel {
  background:
    radial-gradient(ellipse 60% 40% at 10% 20%, rgba(198, 255, 0, 0.07), transparent 55%),
    linear-gradient(180deg, rgba(15, 31, 20, 0.92), rgba(10, 14, 39, 0.94));
}

.page-about .history-layout {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

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

.page-about .timeline::before {
  content: '';
  position: absolute;
  left: 6px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--accent-green), var(--accent-blue), rgba(255, 255, 255, 0.12));
  opacity: 0.6;
}

.page-about .timeline-node {
  position: relative;
  padding: 0 0 28px 34px;
}

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

.page-about .timeline-dot {
  position: absolute;
  left: 1px;
  top: 4px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent-green);
  box-shadow: 0 0 0 4px rgba(198, 255, 0, 0.18);
  transition: background-color 0.25s ease, box-shadow 0.25s ease;
}

.page-about .timeline-node:hover .timeline-dot,
.page-about .timeline-node:focus-within .timeline-dot {
  background: var(--accent-blue);
  box-shadow: 0 0 0 6px rgba(0, 224, 255, 0.22), 0 0 18px rgba(0, 224, 255, 0.55);
}

.page-about .timeline-card {
  padding: 18px 20px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-light);
  border-left: 3px solid var(--border-light);
  border-radius: var(--radius);
  transition: border-color 0.25s ease, background-color 0.25s ease;
}

.page-about .timeline-node:hover .timeline-card,
.page-about .timeline-node:focus-within .timeline-card {
  border-left-color: var(--accent-green);
  background: rgba(255, 255, 255, 0.05);
}

.page-about .timeline-era {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-blue);
  margin-bottom: 6px;
}

.page-about .timeline-card h3 {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 900;
  margin: 0 0 8px;
}

.page-about .timeline-card p {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-secondary);
  margin: 0;
}

.page-about .timeline-figure {
  aspect-ratio: 7 / 9;
  margin: 0;
  max-width: 440px;
}

/* ---------- 04 技术架构 ---------- */
.page-about .tech-panel {
  background:
    radial-gradient(circle 55% 55% at 92% 94%, rgba(0, 224, 255, 0.1), transparent 60%),
    var(--primary-bg);
  border-color: rgba(0, 224, 255, 0.16);
}

.page-about .tech-grid {
  display: grid;
  gap: 16px;
}

.page-about .tech-card {
  padding: 26px 22px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-light);
  border-top: 2px solid var(--accent-blue);
  border-radius: var(--radius);
  transition: border-color 0.25s ease, background-color 0.25s ease, transform 0.25s ease;
}

.page-about .tech-card:hover {
  border-top-color: var(--accent-green);
  background: rgba(255, 255, 255, 0.05);
  transform: translateY(-2px);
}

.page-about .tech-index {
  font-family: var(--font-data);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--accent-green);
}

.page-about .tech-card h3 {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 900;
  margin: 12px 0 10px;
}

.page-about .tech-card p {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-secondary);
  margin: 0;
}

/* ---------- 继续探索 ---------- */
.page-about .connect-strip {
  margin-top: 8px;
  padding: 32px 24px;
  text-align: center;
  background: linear-gradient(120deg, rgba(198, 255, 0, 0.05), rgba(0, 224, 255, 0.05));
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
}

.page-about .connect-strip-inner {
  max-width: 720px;
  margin: 0 auto;
}

.page-about .connect-strip-title {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 900;
  margin-bottom: 18px;
}

.page-about .connect-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

/* ---------- 桌面断点 ---------- */
@media (min-width: 640px) {
  .page-about .stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about .tech-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about .tech-card:last-child {
    grid-column: span 2;
  }
}

@media (min-width: 860px) {
  .page-about .hero-grid {
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap: 40px;
    align-items: center;
  }
}

@media (min-width: 992px) {
  .page-about .history-layout {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 44px;
    align-items: start;
  }

  .page-about .timeline-figure {
    position: sticky;
    top: 24px;
  }
}

@media (min-width: 1080px) {
  .page-about .tech-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .tech-card:last-child {
    grid-column: auto;
  }
}