/* ===== 品牌故事页 page-about 专属样式 ===== */
.page-about {
  background: var(--bg-deep, #0a0e1a);
}

.page-about section[id],
.page-about div[id] {
  scroll-margin-top: 96px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 44px 0 52px;
  border-bottom: 1px solid var(--color-border, #2a3a55);
  background:
    radial-gradient(ellipse at 88% 12%, rgba(0, 200, 255, 0.14), transparent 55%),
    linear-gradient(150deg, rgba(16, 27, 45, 0.9) 0%, rgba(10, 14, 26, 0.55) 60%, transparent 100%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 46%;
  height: 4px;
  background: linear-gradient(90deg, transparent, var(--color-accent, #00ff9f));
  opacity: 0.75;
}

.page-about .about-hero .breadcrumbs {
  margin-bottom: 40px;
}

.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-about .about-hero-main .section-label {
  margin-bottom: 10px;
}

.page-about .hero-title {
  margin: 0 0 16px;
  font-size: 38px;
  line-height: 1.12;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--color-text, #e8edf7);
}

.page-about .hero-lead {
  margin: 0;
  color: var(--color-text-dim, #9aa8c1);
  font-size: 17px;
  line-height: 1.7;
  max-width: 540px;
}

.page-about .hero-index {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.page-about .hero-index a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--color-border, #2a3a55);
  border-radius: 999px;
  font-size: 13px;
  text-decoration: none;
  color: var(--color-text-dim, #9aa8c1);
  transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
}

.page-about .hero-index a:hover,
.page-about .hero-index a:focus-visible {
  color: var(--color-primary, #00c8ff);
  border-color: rgba(0, 200, 255, 0.55);
  background: rgba(0, 200, 255, 0.07);
}

.page-about .hero-index .mono {
  font-size: 11px;
  color: var(--color-accent, #00ff9f);
}

.page-about .about-hero-side {
  display: grid;
  gap: 10px;
  align-content: start;
  padding-top: 6px;
}

.page-about .hero-meta {
  margin: 0;
  padding: 4px 0 4px 14px;
  border-left: 2px solid var(--color-primary, #00c8ff);
  font-size: 14px;
  letter-spacing: 0.05em;
  color: var(--color-text-dim, #9aa8c1);
}

/* ---------- 区块标题 ---------- */
.page-about .section-label {
  margin: 0 0 8px;
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-primary, #00c8ff);
}

.page-about .section-title {
  margin: 0 0 12px;
  font-size: 32px;
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--color-text, #e8edf7);
}

.page-about .section-lead {
  margin: 0;
  color: var(--color-text-dim, #9aa8c1);
  font-size: 16px;
  line-height: 1.6;
  max-width: 520px;
}

/* ---------- 媒体容器 ---------- */
.page-about .media-frame {
  display: block;
  overflow: hidden;
  border: 1px solid var(--color-border, #2a3a55);
  border-radius: var(--radius-sm, 6px);
  background: var(--bg-panel, #101b2d);
  line-height: 0;
}

.page-about .media-frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .media-note {
  margin: 0;
  font-size: 13px;
  line-height: 1.5;
  color: var(--color-text-dim, #9aa8c1);
}

/* ---------- 品牌起源 ---------- */
.page-about .about-origin {
  padding: 60px 0;
}

.page-about .about-origin-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  margin-top: 36px;
}

.page-about .about-origin-main p {
  margin: 0 0 18px;
  line-height: 1.75;
  color: var(--color-text, #e8edf7);
}

.page-about .about-dropcap::first-letter {
  float: left;
  margin: 6px 10px 0 0;
  font-size: 3.4em;
  font-weight: 800;
  line-height: 0.8;
  color: var(--color-primary, #00c8ff);
}

.page-about .about-origin-side {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-about .about-origin-side .media-frame {
  aspect-ratio: 4 / 3;
}

.page-about .about-origin-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.page-about .about-origin-stats .stat-card {
  background: var(--bg-panel, #101b2d);
  border: 1px solid var(--color-border, #2a3a55);
  border-radius: var(--radius-sm, 6px);
  padding: 14px 16px;
}

.page-about .stat-value {
  display: block;
  font-family: var(--font-data, monospace);
  font-size: 24px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--color-accent, #00ff9f);
}

.page-about .stat-label {
  display: block;
  margin-top: 4px;
  font-size: 13px;
  color: var(--color-text-dim, #9aa8c1);
}

/* ---------- 发展里程碑 ---------- */
.page-about .about-milestones {
  padding: 60px 0;
  background: linear-gradient(180deg, rgba(16, 27, 45, 0.45), transparent 40%);
}

.page-about .about-milestone-fig {
  margin: 36px 0 0;
}

.page-about .about-milestone-fig .media-frame {
  aspect-ratio: 21 / 9;
}

.page-about .about-milestone-fig .media-note {
  margin-top: 10px;
  text-align: right;
  letter-spacing: 0.05em;
}

.page-about .about-timeline {
  display: grid;
  gap: 20px;
  margin-top: 40px;
}

.page-about .timeline-item {
  position: relative;
  padding: 4px 0 4px 44px;
  border-left: 2px solid rgba(0, 200, 255, 0.22);
}

.page-about .timeline-marker {
  position: absolute;
  left: -11px;
  top: 10px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--bg-deep, #0a0e1a);
  border: 3px solid var(--color-primary, #00c8ff);
  box-shadow: 0 0 12px rgba(0, 200, 255, 0.35);
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.page-about .timeline-item:hover .timeline-marker {
  transform: scale(1.18);
  border-color: var(--color-accent, #00ff9f);
  box-shadow: 0 0 20px rgba(0, 255, 159, 0.45);
}

.page-about .timeline-phase {
  margin-bottom: 6px;
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-primary, #00c8ff);
}

.page-about .timeline-body h3 {
  margin: 0 0 8px;
  font-size: 19px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-text, #e8edf7);
}

.page-about .timeline-body p {
  margin: 0;
  max-width: 64ch;
  line-height: 1.7;
  color: var(--color-text-dim, #9aa8c1);
}

/* ---------- 团队与理念 ---------- */
.page-about .about-team {
  padding: 60px 0;
}

.page-about .about-quote-block {
  position: relative;
  margin: 36px 0 28px;
  padding: 36px 24px 36px 68px;
  overflow: hidden;
  border: 1px solid rgba(0, 200, 255, 0.2);
  border-left: 3px solid var(--color-primary, #00c8ff);
  border-radius: var(--radius-sm, 6px);
  background: linear-gradient(120deg, rgba(0, 200, 255, 0.09), rgba(0, 255, 159, 0.03) 70%);
}

.page-about .about-quote-mark {
  position: absolute;
  left: 2px;
  top: -6px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 110px;
  font-weight: 800;
  line-height: 1;
  color: rgba(0, 200, 255, 0.14);
  pointer-events: none;
  user-select: none;
}

.page-about .about-quote-block blockquote {
  margin: 0;
}

.page-about .about-quote-block blockquote p {
  margin: 0;
  font-size: 19px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--color-text, #e8edf7);
}

.page-about .about-quote-block cite {
  display: block;
  margin-top: 14px;
  font-size: 13px;
  font-style: normal;
  letter-spacing: 0.08em;
  color: var(--color-accent, #00ff9f);
}

.page-about .about-team-visual {
  display: grid;
  gap: 10px;
  margin: 28px 0 32px;
}

.page-about .about-team-visual .media-frame {
  aspect-ratio: 16 / 7;
}

.page-about .about-values {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .about-value-card {
  overflow: hidden;
  background: var(--bg-panel, #101b2d);
  border: 1px solid var(--color-border, #2a3a55);
  border-radius: var(--radius-sm, 6px);
}

.page-about .about-value-card summary {
  display: block;
  position: relative;
  padding: 18px 48px 18px 20px;
  cursor: pointer;
  list-style: none;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--color-text, #e8edf7);
  transition: color 0.2s ease, background 0.2s ease;
}

.page-about .about-value-card summary::-webkit-details-marker {
  display: none;
}

.page-about .about-value-card summary:hover {
  background: rgba(0, 200, 255, 0.04);
}

.page-about .about-value-card summary h3 {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
}

.page-about .about-value-card summary::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-data, monospace);
  font-size: 22px;
  font-weight: 400;
  color: var(--color-primary, #00c8ff);
}

.page-about .about-value-card[open] summary {
  background: rgba(0, 200, 255, 0.06);
  color: var(--color-accent, #00ff9f);
}

.page-about .about-value-card[open] summary::after {
  content: "−";
}

.page-about .about-value-card p {
  margin: 0;
  padding: 0 20px 20px;
  line-height: 1.7;
  color: var(--color-text-dim, #9aa8c1);
}

/* ---------- 资质与认证 ---------- */
.page-about .about-cert {
  padding: 60px 0;
  background: linear-gradient(0deg, rgba(16, 27, 45, 0.6), transparent 50%);
}

.page-about .about-cert-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 36px;
}

.page-about .about-cert-card {
  padding: 24px;
  border: 1px solid var(--color-border, #2a3a55);
  border-top: 3px solid var(--color-primary, #00c8ff);
  border-radius: var(--radius-sm, 6px);
  background: linear-gradient(180deg, var(--bg-nested, #16233a), var(--bg-panel, #101b2d));
  transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
}

.page-about .about-cert-card:nth-child(even) {
  border-top-color: var(--color-warm, #ff7a00);
}

.page-about .about-cert-card:hover,
.page-about .about-cert-card:focus-within {
  transform: translateY(-3px);
  border-color: rgba(0, 200, 255, 0.5);
  box-shadow: var(--shadow-glow, 0 0 18px rgba(0, 200, 255, 0.25));
}

.page-about .about-cert-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 52px;
  min-height: 34px;
  margin-bottom: 18px;
  padding: 6px 14px;
  border: 1px solid rgba(0, 200, 255, 0.4);
  border-radius: 4px;
  background: rgba(0, 200, 255, 0.07);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--color-primary, #00c8ff);
  transition: box-shadow 0.25s ease;
}

.page-about .about-cert-card:nth-child(even) .about-cert-icon {
  border-color: rgba(255, 122, 0, 0.4);
  background: rgba(255, 122, 0, 0.07);
  color: var(--color-warm, #ff7a00);
}

.page-about .about-cert-card:hover .about-cert-icon {
  box-shadow: 0 0 14px rgba(0, 200, 255, 0.3);
}

.page-about .about-cert-card:nth-child(even):hover .about-cert-icon {
  box-shadow: 0 0 14px rgba(255, 122, 0, 0.3);
}

.page-about .about-cert-card h3 {
  margin: 0 0 10px;
  font-size: 20px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-text, #e8edf7);
}

.page-about .about-cert-card p {
  margin: 0;
  line-height: 1.7;
  color: var(--color-text-dim, #9aa8c1);
}

.page-about .about-cert-hint {
  display: block;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed var(--color-border, #2a3a55);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--color-text-dim, #9aa8c1);
  transition: color 0.25s ease;
}

.page-about .about-cert-card:hover .about-cert-hint {
  color: var(--color-accent, #00ff9f);
}

/* ---------- 信任声明 ---------- */
.page-about .about-trust {
  padding: 28px 0;
  border-top: 1px solid var(--color-border, #2a3a55);
  border-bottom: 1px solid var(--color-border, #2a3a55);
  background: rgba(0, 255, 159, 0.04);
}

.page-about .about-trust-text {
  margin: 0 auto;
  max-width: 760px;
  text-align: center;
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text, #e8edf7);
}

.page-about .about-trust-text::before {
  content: "✓  ";
  color: var(--color-accent, #00ff9f);
  font-weight: 700;
}

/* ---------- 延伸阅读 ---------- */
.page-about .about-next {
  padding: 56px 0;
}

.page-about .about-next-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  align-items: center;
}

.page-about .about-next-copy h2 {
  margin: 0 0 10px;
  font-size: 28px;
  font-weight: 800;
  line-height: 1.2;
  color: var(--color-text, #e8edf7);
}

.page-about .about-next-copy p {
  margin: 0;
  max-width: 480px;
  line-height: 1.6;
  color: var(--color-text-dim, #9aa8c1);
}

.page-about .about-next-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 平板 / 桌面 ---------- */
@media (min-width: 680px) {
  .page-about .about-cert-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 760px) {
  .page-about .hero-title {
    font-size: 52px;
  }
}

@media (min-width: 840px) {
  .page-about .about-origin-grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
    align-items: start;
  }

  .page-about .about-quote-block {
    padding: 44px 48px 44px 110px;
  }

  .page-about .about-quote-mark {
    left: 12px;
    top: -10px;
    font-size: 170px;
  }

  .page-about .about-quote-block blockquote p {
    font-size: 24px;
  }

  .page-about .about-values {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .about-next-grid {
    grid-template-columns: minmax(0, 1fr) auto;
  }
}

@media (min-width: 900px) {
  .page-about .about-timeline {
    gap: 28px;
  }

  .page-about .timeline-item {
    display: grid;
    grid-template-columns: 190px minmax(0, 1fr);
    gap: 36px;
    padding: 12px 0;
    border-left: none;
  }

  .page-about .timeline-phase {
    margin: 0;
    padding-right: 28px;
    text-align: right;
    border-right: 2px solid rgba(0, 200, 255, 0.28);
    line-height: 1.6;
  }

  .page-about .timeline-marker {
    left: 180px;
    top: 18px;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero {
    padding: 64px 0 72px;
  }

  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 48px;
    align-items: end;
  }

  .page-about .about-hero-side {
    padding-left: 24px;
    border-left: 1px solid var(--color-border, #2a3a55);
  }

  .page-about .hero-meta {
    padding-left: 0;
    border-left: none;
  }
}