.page-about {
  --about-lime: #D4FF3F;
  --about-blue: #00E5FF;
  --about-ink: #0A1E18;
  --about-panel: #1F3D36;
  --about-cream: #F5F0E6;
  background-color: var(--bg-night);
  color: var(--text-pale);
  font-family: var(--font-body);
  line-height: 1.8;
  overflow-x: hidden;
}

/* 面包屑 */
.page-about .breadcrumb {
  padding-top: 28px;
  padding-bottom: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
}
.page-about .breadcrumb a {
  color: var(--accent-blue);
  text-decoration: none;
  transition: color var(--ease-fast);
}
.page-about .breadcrumb a:hover {
  color: var(--accent-lime);
  text-decoration: underline;
}
.page-about .breadcrumb [aria-current="page"] {
  color: var(--text-pale);
  opacity: 0.75;
}

/* 首屏 */
.page-about .about-hero {
  padding: 40px 0 0;
  position: relative;
}
.page-about .about-hero-grid {
  display: grid;
  gap: 40px 48px;
}
.page-about .about-hero-label {
  color: var(--accent-lime);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
}
.page-about .about-hero-label-line {
  color: var(--accent-blue);
}
.page-about .about-hero-title {
  margin: 10px 0 20px;
  color: var(--text-pale);
  font-size: clamp(44px, 8vw, 96px);
  line-height: 0.95;
  text-transform: uppercase;
  letter-spacing: 0.01em;
}
.page-about .about-hero-title-sub {
  display: block;
  color: var(--accent-lime);
}
.page-about .about-hero-lead {
  max-width: 540px;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.9;
  color: var(--text-pale);
  opacity: 0.86;
  margin: 0;
}
.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}
.page-about .about-hero-index {
  background: var(--bg-forest);
  border: 1px solid var(--border-green);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  position: relative;
}
.page-about .about-hero-index::before {
  content: "";
  position: absolute;
  top: 0;
  left: 24px;
  width: 48px;
  height: 4px;
  background: var(--accent-lime);
  border-radius: 0 0 4px 4px;
}
.page-about .about-hero-index-title {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent-blue);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin: 0 0 16px;
}
.page-about .about-hero-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .about-hero-index-list li {
  border-bottom: 1px solid var(--border-green);
}
.page-about .about-hero-index-list li:last-child {
  border-bottom: 0;
}
.page-about .about-hero-index-list a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 4px;
  color: var(--text-pale);
  text-decoration: none;
  font-family: var(--font-display);
  font-size: 18px;
  letter-spacing: 0.02em;
  transition: color var(--ease-fast), padding-left var(--ease-med);
}
.page-about .about-hero-index-list a:hover {
  color: var(--accent-lime);
  padding-left: 12px;
}
.page-about .about-hero-index-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent-blue);
  min-width: 22px;
}
.page-about .about-hero-index-foot {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-pale);
  opacity: 0.7;
}
.page-about .about-hero-index-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-lime);
  animation: page-about-pulse 2s infinite;
}
@keyframes page-about-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.8); }
}
.page-about .about-hero-imgwrap {
  margin-top: 48px;
  height: 320px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-green);
}
.page-about .about-hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* 起源 */
.page-about .about-origin {
  padding: 80px 0 60px;
}
.page-about .about-origin-grid {
  display: grid;
  gap: 36px;
}
.page-about .about-origin-aside {
  border-left: 3px solid var(--accent-lime);
  padding-left: 20px;
}
.page-about .about-origin-bignum {
  font-family: var(--font-display);
  font-size: 76px;
  line-height: 1;
  color: var(--accent-blue);
  opacity: 0.22;
  display: block;
  margin: 8px 0 4px;
}
.page-about .about-origin-aside-note {
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--text-pale);
  opacity: 0.8;
}
.page-about .about-origin-main .display-md {
  margin: 12px 0 20px;
}
.page-about .about-origin-main .content p {
  font-size: 15px;
  line-height: 1.95;
  color: var(--text-pale);
  opacity: 0.88;
  margin-bottom: 16px;
}
.page-about .about-origin-quote {
  border-left: 3px solid var(--accent-lime);
  margin: 24px 0;
  padding: 12px 20px;
  background: rgba(212, 255, 63, 0.08);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  color: var(--text-pale);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

/* 里程碑 */
.page-about .about-milestones {
  padding: 80px 0;
}
.page-about .about-milestones-head {
  display: grid;
  gap: 12px;
  margin-bottom: 40px;
}
.page-about .about-milestones-lead {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.8;
  color: var(--accent-blue);
  max-width: 320px;
}
.page-about .about-milestones-layout {
  display: grid;
  gap: 40px;
}
.page-about .about-milestone-list {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}
.page-about .about-milestone-list::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent-lime), var(--border-green) 60%, var(--border-green));
}
.page-about .about-milestone-item {
  position: relative;
  padding-left: 48px;
  margin-bottom: 28px;
}
.page-about .about-milestone-item:last-child {
  margin-bottom: 0;
}
.page-about .about-milestone-dot {
  position: absolute;
  left: 8px;
  top: 8px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent-lime);
  box-shadow: 0 0 0 4px rgba(212, 255, 63, 0.15), 0 0 12px rgba(212, 255, 63, 0.3);
  z-index: 1;
  transition: box-shadow var(--ease-fast), transform var(--ease-fast);
}
.page-about .about-milestone-item:hover .about-milestone-dot {
  box-shadow: 0 0 0 6px rgba(212, 255, 63, 0.25), 0 0 20px rgba(212, 255, 63, 0.5);
  transform: scale(1.1);
}
.page-about .about-milestone-card {
  background: var(--bg-forest);
  border: 1px solid var(--border-green);
  border-radius: var(--radius-md);
  padding: 20px 22px 16px;
  transition: background var(--ease-fast), border-color var(--ease-fast), transform var(--ease-fast), box-shadow var(--ease-fast);
}
.page-about .about-milestone-card:hover,
.page-about .about-milestone-card:focus-within {
  background: rgba(212, 255, 63, 0.08);
  border-color: var(--accent-lime);
  transform: translateY(-4px);
  box-shadow: var(--shadow-soft);
}
.page-about .about-milestone-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent-blue);
  letter-spacing: 0.1em;
}
.page-about .about-milestone-card h3 {
  font-family: var(--font-display);
  font-size: 22px;
  margin: 6px 0 8px;
  color: var(--text-pale);
}
.page-about .about-milestone-card p {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.85;
  color: var(--text-pale);
  opacity: 0.8;
  margin: 0;
}
.page-about .about-milestones-figure {
  margin: 0;
  align-self: start;
}
.page-about .about-milestones-figure img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-green);
  display: block;
}
.page-about .about-milestones-figure figcaption {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-pale);
  opacity: 0.7;
  margin-top: 10px;
  padding-left: 4px;
  border-left: 2px solid var(--accent-blue);
}

/* 团队 */
.page-about .about-team {
  padding: 80px 0;
  background: linear-gradient(to bottom, rgba(10, 30, 24, 0) 0%, rgba(10, 30, 24, 0.35) 100%);
}
.page-about .about-team-grid {
  display: grid;
  gap: 40px;
}
.page-about .about-team-lead {
  font-size: 16px;
  color: var(--text-pale);
  opacity: 0.86;
  margin: 12px 0 24px;
}
.page-about .about-team-roles {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .about-team-role {
  display: flex;
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--border-green);
}
.page-about .about-team-role:first-child {
  border-top: 1px solid var(--border-green);
}
.page-about .about-team-role-code {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent-lime);
  min-width: 76px;
  padding-top: 4px;
  letter-spacing: 0.08em;
}
.page-about .about-team-role-body h3 {
  font-family: var(--font-display);
  font-size: 20px;
  margin: 0 0 6px;
  color: var(--text-pale);
}
.page-about .about-team-role-body p {
  font-size: 14px;
  line-height: 1.85;
  color: var(--text-pale);
  opacity: 0.75;
  margin: 0;
}
.page-about .about-team-visual img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-green);
  display: block;
}

/* 旧版内容中心回访 */
.page-about .about-legacy {
  padding: 80px 0;
}
.page-about .about-legacy-panel {
  display: grid;
  gap: 36px;
  background: var(--bg-forest);
  border: 1px solid var(--border-green);
  border-radius: var(--radius-lg);
  padding: 36px 28px 32px;
  position: relative;
  overflow: hidden;
}
.page-about .about-legacy-panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--accent-lime), var(--accent-blue));
}
.page-about .about-legacy-copy .content p {
  font-size: 15px;
  line-height: 1.9;
  color: var(--text-pale);
  opacity: 0.85;
  margin-bottom: 16px;
}
.page-about .about-legacy-copy .btn {
  margin-top: 8px;
}
.page-about .about-legacy-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.page-about .about-legacy-stat {
  background: var(--bg-deep);
  border: 1px solid var(--border-green);
  border-radius: var(--radius-md);
  padding: 24px 16px 20px;
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 120px;
}
.page-about .about-legacy-stat-num {
  font-family: var(--font-display);
  font-size: 42px;
  color: var(--accent-lime);
  line-height: 1;
  margin-bottom: 10px;
}
.page-about .about-legacy-stat-label {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-pale);
  opacity: 0.75;
}

/* 服务承诺 */
.page-about .about-commitment {
  padding: 80px 0;
}
.page-about .about-commitment-head {
  margin-bottom: 36px;
}
.page-about .about-commitment-grid {
  display: grid;
  gap: 20px;
}
.page-about .about-commitment-card {
  background: var(--bg-cream);
  color: var(--text-ink);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  position: relative;
  overflow: hidden;
  transition: transform var(--ease-med), box-shadow var(--ease-med);
}
.page-about .about-commitment-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lift);
}
.page-about .about-commitment-code {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--accent-blue);
}
.page-about .about-commitment-card h3 {
  font-family: var(--font-display);
  font-size: 24px;
  margin: 10px 0 8px;
  color: var(--text-ink);
}
.page-about .about-commitment-card p {
  font-size: 14px;
  line-height: 1.85;
  color: var(--text-forest);
  opacity: 0.88;
  margin: 0;
}
.page-about .about-commitment-foot {
  margin-top: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--border-green);
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: flex-start;
}
.page-about .about-commitment-foot-text {
  font-family: var(--font-display);
  font-size: 22px;
  color: var(--text-pale);
  margin: 0;
}
.page-about .about-commitment-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* 平板 */
@media (min-width: 768px) {
  .page-about .about-legacy-stats {
    grid-template-columns: repeat(4, 1fr);
  }
  .page-about .about-hero-imgwrap {
    height: 380px;
  }
  .page-about .about-commitment-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* 桌面 */
@media (min-width: 1024px) {
  .page-about .about-hero {
    padding: 48px 0 0;
  }
  .page-about .about-hero-grid {
    grid-template-columns: 7fr 5fr;
    align-items: start;
  }
  .page-about .about-hero-imgwrap {
    height: 440px;
  }
  .page-about .about-origin-grid {
    grid-template-columns: 4fr 8fr;
    gap: 60px;
  }
  .page-about .about-origin {
    padding: 100px 0 80px;
  }
  .page-about .about-milestones-head {
    grid-template-columns: 1fr auto;
    align-items: end;
    margin-bottom: 48px;
  }
  .page-about .about-milestones-layout {
    grid-template-columns: 7fr 5fr;
    gap: 60px;
    align-items: start;
  }
  .page-about .about-milestones {
    padding: 100px 0;
  }
  .page-about .about-team-grid {
    grid-template-columns: 7fr 5fr;
    gap: 60px;
    align-items: start;
  }
  .page-about .about-team {
    padding: 100px 0;
  }
  .page-about .about-legacy-panel {
    grid-template-columns: 6fr 6fr;
    gap: 48px;
    padding: 48px 44px 44px;
  }
  .page-about .about-legacy {
    padding: 100px 0;
  }
  .page-about .about-commitment {
    padding: 100px 0;
  }
  .page-about .about-commitment-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }
  .page-about .about-commitment-foot {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
  .page-about .about-commitment-actions {
    justify-content: flex-end;
  }
}