.page-about {
  --about-panel: var(--color-bg-panel);
  --about-panel-deep: var(--color-bg-panel-alt);
  --about-line: var(--color-border);
  --about-text: var(--color-silver);
  --about-text-dim: var(--color-silver-dim);
  --about-bright: var(--color-white);
  --about-blue: var(--color-primary);
  --about-orange: var(--color-accent);
  position: relative;
  overflow-x: clip;
  background: var(--color-bg);
  color: var(--about-text);
}

.page-about::before,
.page-about::after {
  content: "";
  position: absolute;
  pointer-events: none;
  z-index: 0;
  border-radius: 50%;
  filter: blur(60px);
}

.page-about::before {
  top: 420px;
  right: -220px;
  width: 440px;
  height: 440px;
  background: rgba(0, 229, 255, 0.08);
}

.page-about::after {
  top: 1900px;
  left: -200px;
  width: 400px;
  height: 400px;
  background: rgba(255, 107, 0, 0.07);
}

.page-about .breadcrumb {
  position: relative;
  z-index: 1;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 24px 20px 0;
  font-size: 12px;
  letter-spacing: 0.04em;
}

.page-about .about-index {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--about-blue);
  margin-right: 6px;
  letter-spacing: 0.08em;
}

.page-about h1,
.page-about h2 {
  font-weight: 900;
  color: var(--about-bright);
  letter-spacing: -0.02em;
  line-height: 1.12;
  margin: 14px 0 18px;
}

.page-about h1 {
  font-size: clamp(32px, 7vw, 60px);
}

.page-about h2 {
  font-size: clamp(26px, 5vw, 42px);
}

.page-about .about-title-sep {
  color: var(--about-orange);
  font-weight: 300;
  padding: 0 4px;
}

/* ---------- 品牌故事 ---------- */
.page-about .about-story {
  position: relative;
  z-index: 1;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 44px 20px 68px;
}

.page-about .about-story-head {
  margin-bottom: 36px;
}

.page-about .about-lead {
  max-width: 680px;
  font-size: clamp(16px, 2.3vw, 20px);
  line-height: 1.72;
  color: var(--about-text);
  margin: 0;
}

.page-about .about-story-body {
  display: grid;
  gap: 30px;
  align-items: center;
}

.page-about .about-story-copy p {
  font-size: 15px;
  line-height: 1.78;
  color: var(--about-text);
  margin: 0 0 18px;
}

.page-about .about-story-copy p strong {
  color: var(--about-bright);
}

.page-about .about-story-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-story-media {
  position: relative;
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--about-line);
  background: var(--about-panel);
  box-shadow: var(--shadow-panel);
}

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

.page-about .about-story-media figcaption {
  padding: 12px 16px 14px;
  font-size: 12px;
  color: var(--about-text-dim);
  letter-spacing: 0.02em;
}

/* ---------- 发展历程 ---------- */
.page-about .about-milestones {
  position: relative;
  z-index: 1;
  background: var(--color-bg-deep);
  border-top: 1px solid var(--about-line);
  border-bottom: 1px solid var(--about-line);
  padding: 64px 0 72px;
}

.page-about .about-milestones::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-bar);
  opacity: 0.9;
}

.page-about .about-milestones-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 20px;
}

.page-about .about-milestones-head {
  margin-bottom: 40px;
}

.page-about .about-milestones-head > p {
  max-width: 560px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--about-text);
  margin: 0;
}

.page-about .about-milestones-wrap {
  display: grid;
  gap: 36px;
  align-items: start;
}

.page-about .about-timeline-holder {
  position: relative;
  min-width: 0;
}

.page-about .about-timeline-rail {
  position: absolute;
  left: 13px;
  top: 4px;
  bottom: 8px;
  width: 2px;
  height: calc(100% - 12px);
  z-index: 0;
  opacity: 0.85;
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
  z-index: 1;
}

.page-about .about-timeline-item {
  position: relative;
  padding: 0 0 34px 48px;
}

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

.page-about .about-timeline-marker {
  position: absolute;
  left: 8px;
  top: 4px;
  width: 12px;
  height: 12px;
  border-radius: var(--radius-pill);
  background: var(--about-blue);
  box-shadow: 0 0 0 4px rgba(0, 229, 255, 0.16), 0 0 18px rgba(0, 229, 255, 0.38);
}

.page-about .about-timeline-item.is-current .about-timeline-marker {
  background: var(--about-orange);
  box-shadow: 0 0 0 4px rgba(255, 107, 0, 0.16), 0 0 18px rgba(255, 107, 0, 0.4);
}

.page-about .about-timeline-year {
  display: block;
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  color: var(--about-blue);
  letter-spacing: 0.08em;
  margin-bottom: 4px;
}

.page-about .about-timeline-item.is-current .about-timeline-year {
  color: var(--about-orange);
}

.page-about .about-timeline-content {
  display: block;
}

.page-about .about-timeline-content strong {
  display: block;
  font-size: 17px;
  font-weight: 700;
  color: var(--about-bright);
  margin-bottom: 4px;
}

.page-about .about-timeline-content span {
  display: block;
  font-size: 14px;
  line-height: 1.66;
  color: var(--about-text-dim);
}

.page-about .about-milestones-media {
  position: relative;
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--about-line);
  background: var(--about-panel);
  box-shadow: var(--shadow-panel);
}

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

/* ---------- 核心数据 ---------- */
.page-about .about-stats {
  position: relative;
  z-index: 1;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 72px 20px 80px;
}

.page-about .about-stats-head {
  margin-bottom: 36px;
}

.page-about .about-stats-head > p {
  max-width: 560px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--about-text);
  margin: 0;
}

.page-about .about-stats-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-stat-item {
  position: relative;
  background: var(--about-panel);
  border: 1px solid var(--about-line);
  border-radius: var(--radius-md);
  padding: 26px 22px 24px;
  overflow: hidden;
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.page-about .about-stat-item::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--gradient-brand);
  opacity: 0;
  transition: opacity 0.25s ease;
}

.page-about .about-stat-item:hover {
  transform: translateY(-3px);
  border-color: rgba(0, 229, 255, 0.3);
  box-shadow: var(--shadow-blue);
}

.page-about .about-stat-item:hover::after {
  opacity: 1;
}

.page-about .about-stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(40px, 8vw, 58px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--about-blue);
  margin-bottom: 12px;
}

.page-about .about-stat-item:nth-child(2) .about-stat-num,
.page-about .about-stat-item:nth-child(5) .about-stat-num {
  color: var(--about-orange);
}

.page-about .about-stat-label {
  display: block;
  font-size: 16px;
  font-weight: 700;
  color: var(--about-bright);
  margin-bottom: 8px;
}

.page-about .about-stat-desc {
  display: block;
  font-size: 13px;
  line-height: 1.6;
  color: var(--about-text-dim);
}

/* ---------- 技术实力 ---------- */
.page-about .about-tech {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 36px;
  align-items: center;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 72px 20px 80px;
}

.page-about .about-tech-media-col {
  order: 2;
}

.page-about .about-tech-content {
  order: 1;
}

.page-about .about-tech-media {
  position: relative;
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--about-line);
  background: var(--about-panel-deep);
  box-shadow: var(--shadow-panel);
}

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

.page-about .about-tech-content > p {
  max-width: 560px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--about-text);
  margin: 0 0 28px;
}

.page-about .about-tech-grid {
  display: grid;
  gap: 14px;
}

.page-about .about-tech-card {
  position: relative;
  background: var(--about-panel);
  border: 1px solid var(--about-line);
  border-radius: var(--radius-md);
  padding: 20px 20px 18px 58px;
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.page-about .about-tech-card:hover {
  border-color: rgba(0, 229, 255, 0.35);
  transform: translateX(4px);
}

.page-about .about-tech-icon {
  position: absolute;
  left: 18px;
  top: 22px;
  font-size: 20px;
  color: var(--about-blue);
}

.page-about .about-tech-card:nth-child(2) .about-tech-icon {
  color: var(--about-orange);
}

.page-about .about-tech-card strong {
  display: block;
  font-size: 16px;
  font-weight: 700;
  color: var(--about-bright);
  margin-bottom: 6px;
}

.page-about .about-tech-card p {
  font-size: 13px;
  line-height: 1.6;
  color: var(--about-text-dim);
  margin: 0;
}

/* ---------- 信誉与认证 ---------- */
.page-about .about-trust {
  position: relative;
  z-index: 1;
  background: var(--color-bg-deep);
  border-top: 1px solid var(--about-line);
  padding: 72px 20px 88px;
}

.page-about .about-trust::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-bar);
  opacity: 0.5;
}

.page-about .about-trust-inner {
  max-width: var(--content-max);
  margin: 0 auto;
}

.page-about .about-trust-lead {
  max-width: 640px;
  font-size: 15px;
  line-height: 1.72;
  color: var(--about-text);
  margin: 0 0 32px;
}

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

.page-about .about-trust-card {
  position: relative;
  background: var(--about-panel);
  border: 1px solid var(--about-line);
  border-radius: var(--radius-md);
  padding: 22px 22px 22px 48px;
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.page-about .about-trust-card:hover {
  border-color: rgba(255, 107, 0, 0.35);
  transform: translateY(-3px);
}

.page-about .about-trust-pin {
  position: absolute;
  left: 20px;
  top: 26px;
  width: 10px;
  height: 10px;
  border-radius: var(--radius-pill);
  background: var(--about-blue);
  box-shadow: 0 0 14px rgba(0, 229, 255, 0.45);
}

.page-about .about-trust-card:nth-child(2) .about-trust-pin,
.page-about .about-trust-card:nth-child(4) .about-trust-pin {
  background: var(--about-orange);
  box-shadow: 0 0 14px rgba(255, 107, 0, 0.4);
}

.page-about .about-trust-card strong {
  display: block;
  font-size: 16px;
  font-weight: 700;
  color: var(--about-bright);
  margin-bottom: 6px;
}

.page-about .about-trust-card p {
  font-size: 13px;
  line-height: 1.62;
  color: var(--about-text-dim);
  margin: 0;
}

.page-about .about-trust-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

/* ---------- 中等屏 ---------- */
@media (min-width: 700px) {

  .page-about .about-story-body {
    grid-template-columns: 1fr 0.92fr;
    gap: 40px;
  }

  .page-about .about-stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
  }

  .page-about .about-tech-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .page-about .about-trust-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
  }

}

/* ---------- 桌面端 ---------- */
@media (min-width: 960px) {

  .page-about .breadcrumb {
    padding: 28px 32px 0;
  }

  .page-about .about-story {
    padding: 56px 32px 88px;
  }

  .page-about .about-story-head {
    margin-bottom: 48px;
  }

  .page-about .about-story-body {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 56px;
  }

  .page-about .about-milestones {
    padding: 84px 0 96px;
  }

  .page-about .about-milestones-inner {
    padding: 0 32px;
  }

  .page-about .about-milestones-wrap {
    grid-template-columns: 1.12fr 0.88fr;
    gap: 56px;
  }

  .page-about .about-milestones-media {
    position: sticky;
    top: 120px;
  }

  .page-about .about-timeline-item {
    padding-bottom: 40px;
  }

  .page-about .about-timeline-year {
    font-size: 18px;
  }

  .page-about .about-stats {
    padding: 88px 32px 96px;
  }

  .page-about .about-stats-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }

  .page-about .about-stat-item {
    padding: 30px 26px 26px;
  }

  .page-about .about-tech {
    grid-template-columns: 0.9fr 1.1fr;
    gap: 56px;
    padding: 96px 32px 100px;
  }

  .page-about .about-tech-media-col {
    order: 1;
  }

  .page-about .about-tech-content {
    order: 2;
  }

  .page-about .about-tech-content > p {
    margin-bottom: 32px;
  }

  .page-about .about-trust {
    padding: 88px 32px 100px;
  }

  .page-about .about-trust-grid {
    gap: 20px;
  }

  .page-about .about-trust-cta {
    margin-top: 36px;
  }

}