.page-about {
  --about-grid-line: rgba(0, 194, 255, 0.06);
  --about-red-glow: rgba(255, 46, 77, 0.16);
  --about-blue-glow: rgba(0, 194, 255, 0.12);
  --about-silver-edge: rgba(168, 180, 192, 0.35);
  background: var(--color-ink);
  color: var(--text-high);
  font-family: var(--font-base);
  line-height: 1.5;
  overflow-x: hidden;
}

/* ========== 篇首刊头 ========== */
.page-about .about-hero {
  position: relative;
  padding: 32px 0 80px;
  overflow: hidden;
}

.page-about .about-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 78% 12%, var(--about-red-glow), transparent 42%),
    radial-gradient(ellipse at 18% 82%, var(--about-blue-glow), transparent 42%),
    linear-gradient(var(--about-grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--about-grid-line) 1px, transparent 1px);
  background-size: auto, auto, 48px 48px, 48px 48px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 48px), 0 100%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 4px;
  background: var(--gradient-energy);
  transform: skewY(-1.2deg);
  transform-origin: left;
  opacity: 0.85;
  pointer-events: none;
}

.page-about .about-hero .shell {
  position: relative;
  z-index: 1;
}

.page-about .about-hero .breadcrumb {
  margin-bottom: 32px;
  font-size: 14px;
  color: var(--text-low);
}

.page-about .about-hero .breadcrumb a {
  color: var(--text-low);
  text-decoration: none;
  transition: color 0.25s ease;
}

.page-about .about-hero .breadcrumb a:hover {
  color: var(--color-blue);
}

.page-about .about-hero .display-title {
  font-family: var(--font-display);
  font-size: clamp(40px, 9vw, 72px);
  font-weight: 900;
  line-height: 1.04;
  letter-spacing: -0.03em;
  margin: 8px 0 4px;
  color: var(--text-high);
}

.page-about .about-hero-subtitle {
  font-family: var(--font-display);
  font-size: clamp(22px, 4.5vw, 38px);
  font-weight: 800;
  line-height: 1.2;
  margin: 0 0 20px;
  background: linear-gradient(120deg, var(--color-red), var(--color-blue));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  width: fit-content;
}

.page-about .about-hero-lead {
  max-width: 680px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-low);
  margin: 0 0 28px;
}

.page-about .about-hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-hero-tags .term-chip {
  background: rgba(20, 26, 36, 0.85);
  border: 1px solid var(--border-faint);
  color: var(--color-silver);
  font-size: 13px;
  padding: 6px 14px;
  border-radius: 2px;
  transition: border-color 0.25s ease, color 0.25s ease;
}

.page-about .about-hero-tags .term-chip:hover {
  border-color: rgba(0, 194, 255, 0.45);
  color: var(--text-high);
}

/* ========== 起源 ========== */
.page-about .about-origin {
  border-top: 1px solid var(--border-faint);
  border-bottom: 1px solid var(--border-faint);
  background:
    linear-gradient(135deg, rgba(255, 46, 77, 0.035), transparent 35%),
    linear-gradient(315deg, rgba(0, 194, 255, 0.035), transparent 35%);
}

.page-about .about-origin-grid {
  display: grid;
  gap: 28px;
  align-items: start;
}

.page-about .about-origin-copy {
  position: relative;
  background: var(--color-panel);
  border: 1px solid var(--border-faint);
  border-top: 2px solid var(--about-silver-edge);
  padding: 28px 24px 32px;
  border-radius: 2px;
}

.page-about .about-origin-copy::before {
  content: '';
  position: absolute;
  top: 10px;
  left: 10px;
  right: -10px;
  bottom: -10px;
  background: linear-gradient(135deg, rgba(255, 46, 77, 0.14), rgba(0, 194, 255, 0.14));
  border-radius: 2px;
  z-index: -1;
}

.page-about .about-origin-copy .section-title {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 800;
  line-height: 1.3;
  margin: 6px 0 16px;
  color: var(--text-high);
}

.page-about .about-origin-copy p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-low);
  margin: 0 0 16px;
}

.page-about .about-origin-copy .evidence-box {
  border-left: 3px solid var(--color-red);
  background: rgba(255, 46, 77, 0.06);
  padding: 16px 18px;
  margin-top: 20px;
  font-size: 14px;
  color: var(--text-low);
  border-radius: 0 2px 2px 0;
}

.page-about .about-origin-copy .evidence-box p {
  margin: 0;
  line-height: 1.7;
}

.page-about .about-origin-img {
  background: var(--color-panel);
  border: 1px solid var(--border-faint);
  border-radius: 2px;
  overflow: hidden;
  margin: 0;
}

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

/* ========== 里程碑 ========== */
.page-about .about-milestones {
  padding-top: 64px;
}

.page-about .about-section-head {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 36px;
}

.page-about .about-section-head .section-title {
  font-family: var(--font-display);
  font-size: clamp(30px, 5vw, 44px);
  font-weight: 900;
  line-height: 1.1;
  margin: 6px 0 0;
  color: var(--text-high);
}

.page-about .about-section-hint {
  font-size: 14px;
  color: var(--text-low);
  margin: 0;
}

.page-about .about-milestone-layout {
  display: grid;
  gap: 32px;
}

.page-about .about-milestone-figure {
  margin: 0;
  background: var(--color-panel);
  border: 1px solid var(--border-faint);
  border-radius: 2px;
  overflow: hidden;
  position: relative;
}

.page-about .about-milestone-figure::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: var(--gradient-energy);
  opacity: 0.7;
}

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

.page-about .about-milestone-figure figcaption {
  padding: 12px 14px;
  font-size: 13px;
  color: var(--text-low);
  background: rgba(11, 14, 20, 0.92);
  border-top: 1px solid var(--border-faint);
  letter-spacing: 0.04em;
}

.page-about .about-timeline {
  position: relative;
  display: grid;
  gap: 20px;
}

.page-about .about-milestone-item {
  position: relative;
  display: grid;
  gap: 12px;
  background: var(--color-panel);
  border: 1px solid var(--border-faint);
  border-radius: 2px;
  padding: 20px 20px 22px;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.page-about .about-milestone-item:hover {
  border-color: rgba(0, 194, 255, 0.3);
  box-shadow: 0 0 0 4px rgba(0, 194, 255, 0.06);
  transform: translateX(4px);
}

.page-about .about-milestone-marker {
  display: flex;
  align-items: center;
  gap: 12px;
  transform: skewX(-4deg);
}

.page-about .about-milestone-marker > * {
  transform: skewX(4deg);
}

.page-about .about-year {
  font-family: var(--font-mono);
  font-size: clamp(38px, 8vw, 54px);
  font-weight: 800;
  line-height: 0.9;
  letter-spacing: -0.04em;
  color: var(--color-red);
  background: linear-gradient(180deg, var(--color-red), var(--color-blue));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  display: block;
}

.page-about .about-milestone-item:nth-child(even) .about-year {
  color: var(--color-blue);
}

.page-about .about-milestone-tag {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text-high);
  background: rgba(255, 46, 77, 0.12);
  border: 1px solid rgba(255, 46, 77, 0.3);
  padding: 6px 12px;
  border-radius: 2px;
  white-space: nowrap;
}

.page-about .about-milestone-item:nth-child(even) .about-milestone-tag {
  background: rgba(0, 194, 255, 0.1);
  border-color: rgba(0, 194, 255, 0.3);
}

.page-about .about-milestone-body h3 {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 800;
  margin: 0 0 8px;
  color: var(--text-high);
}

.page-about .about-milestone-body p {
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-low);
  margin: 0;
}

/* ========== 数字档案 ========== */
.page-about .about-stats {
  padding-top: 64px;
  padding-bottom: 64px;
  background:
    linear-gradient(180deg, rgba(20, 26, 36, 0.6), transparent 20%),
    linear-gradient(0deg, rgba(20, 26, 36, 0.6), transparent 20%);
}

.page-about .about-stats-head {
  margin-bottom: 32px;
}

.page-about .about-stats-head .section-title {
  font-family: var(--font-display);
  font-size: clamp(30px, 5vw, 44px);
  font-weight: 900;
  margin: 6px 0 10px;
  color: var(--text-high);
}

.page-about .about-stats-head p {
  font-size: 15px;
  color: var(--text-low);
  margin: 0;
}

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

.page-about .about-stat-item {
  background: var(--color-panel);
  border: 1px solid var(--border-faint);
  border-radius: 2px;
  padding: 24px 12px 22px;
  text-align: center;
  position: relative;
  overflow: hidden;
  transition: border-color 0.3s ease, transform 0.3s ease;
}

.page-about .about-stat-item:hover {
  border-color: rgba(0, 194, 255, 0.32);
  transform: translateY(-3px);
}

.page-about .about-stat-item::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--gradient-energy);
  opacity: 0.7;
}

.page-about .about-stat-num {
  font-family: var(--font-mono);
  font-size: clamp(32px, 7vw, 46px);
  font-weight: 800;
  line-height: 1.1;
  display: block;
  margin-bottom: 8px;
  color: var(--color-red);
}

.page-about .about-stat-item:nth-child(even) .about-stat-num {
  color: var(--color-blue);
}

.page-about .about-stat-item .stat-label {
  font-size: 13px;
  color: var(--color-silver);
  letter-spacing: 0.05em;
}

/* ========== 团队理念 ========== */
.page-about .about-team {
  border-top: 1px solid var(--border-faint);
  border-bottom: 1px solid var(--border-faint);
  background:
    radial-gradient(ellipse at 85% 10%, rgba(255, 46, 77, 0.08), transparent 40%),
    radial-gradient(ellipse at 10% 90%, rgba(0, 194, 255, 0.08), transparent 40%);
}

.page-about .about-team-grid {
  display: grid;
  gap: 32px;
  align-items: center;
}

.page-about .about-team-img {
  margin: 0;
  background: var(--color-panel);
  border: 1px solid var(--border-faint);
  border-radius: 2px;
  overflow: hidden;
  position: relative;
}

.page-about .about-team-img::before {
  content: '';
  display: block;
  padding-bottom: 62.5%;
}

.page-about .about-team-img img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-team-copy .section-title {
  font-family: var(--font-display);
  font-size: clamp(28px, 5vw, 40px);
  font-weight: 900;
  margin: 6px 0 12px;
  color: var(--text-high);
}

.page-about .about-team-copy > p {
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-low);
  margin: 0 0 24px;
}

.page-about .about-principles {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-principles li {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--border-faint);
}

.page-about .about-principles li:first-child {
  padding-top: 0;
}

.page-about .about-principles li:last-child {
  border-bottom: none;
}

.page-about .about-principle-num {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  color: var(--about-silver-edge);
  line-height: 1;
  padding-top: 4px;
}

.page-about .about-principles h3 {
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 800;
  margin: 0 0 6px;
  color: var(--text-high);
}

.page-about .about-principles p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-low);
  margin: 0;
}

/* ========== 继续探索 ========== */
.page-about .about-next {
  padding-top: 64px;
  padding-bottom: 64px;
}

.page-about .about-next-card {
  background: var(--color-panel);
  border: 1px solid var(--border-faint);
  border-radius: 4px;
  padding: 40px 24px 44px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-about .about-next-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-energy);
}

.page-about .about-next-card .section-title {
  font-family: var(--font-display);
  font-size: clamp(24px, 4.5vw, 34px);
  font-weight: 900;
  margin: 6px 0 12px;
  color: var(--text-high);
}

.page-about .about-next-card > p {
  font-size: 15px;
  color: var(--text-low);
  margin: 0 auto 24px;
  max-width: 480px;
}

.page-about .about-next-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
}

/* ========== 响应式 ========== */
@media (min-width: 768px) {
  .page-about .about-hero {
    padding: 48px 0 96px;
  }

  .page-about .about-hero .display-title {
    font-size: 68px;
  }

  .page-about .about-hero-lead {
    font-size: 18px;
  }

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

  .page-about .about-origin-copy {
    padding: 36px 32px 40px;
  }

  .page-about .about-origin-img {
    margin-top: 48px;
  }

  .page-about .about-section-head {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-end;
  }

  .page-about .about-milestone-layout {
    grid-template-columns: 280px 1fr;
    gap: 40px;
    align-items: start;
  }

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

  .page-about .about-timeline {
    gap: 24px;
  }

  .page-about .about-milestone-item {
    padding: 24px 24px 26px;
  }

  .page-about .about-stats-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
  }

  .page-about .about-team-grid {
    grid-template-columns: 0.85fr 1.15fr;
    gap: 48px;
  }

  .page-about .about-next-links {
    gap: 16px;
  }
}

@media (min-width: 1200px) {
  .page-about .about-hero .display-title {
    font-size: 80px;
  }

  .page-about .about-hero-lead {
    max-width: 720px;
  }

  .page-about .about-origin-copy {
    padding: 44px 40px 48px;
  }

  .page-about .about-milestone-layout {
    grid-template-columns: 340px 1fr;
    gap: 56px;
  }

  .page-about .about-stats-grid {
    grid-template-columns: repeat(6, 1fr);
  }

  .page-about .about-stat-item {
    padding: 32px 14px 28px;
  }
}