.page-about {
  --ab-line: rgba(143, 169, 172, 0.22);
  --ab-line-soft: rgba(143, 169, 172, 0.12);
  --ab-cyan-glow: rgba(47, 227, 192, 0.14);
  --ab-orange-glow: rgba(255, 106, 43, 0.12);
  display: block;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  margin-top: 22px;
  font-size: 13px;
  color: var(--stone);
}

.page-about .breadcrumb a {
  color: var(--stone);
  text-decoration: none;
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--cyan);
}

/* ---------- 首屏拼贴 ---------- */
.page-about .about-hero {
  padding: 40px 0 56px;
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(47, 227, 192, 0.10), transparent 62%),
    radial-gradient(90% 80% at 4% 100%, rgba(255, 106, 43, 0.09), transparent 64%);
}

.page-about .about-hero__inner {
  display: grid;
  gap: 36px;
}

.page-about .about-hero__lead .lede {
  margin-top: 18px;
}

.page-about .hero-stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--ab-line-soft);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .hero-stat {
  background: var(--ink-2);
  padding: 18px 16px;
  display: grid;
  gap: 6px;
  align-content: start;
  min-height: 96px;
}

.page-about .hero-stat__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  font-size: clamp(26px, 6vw, 36px);
  line-height: 1;
  color: var(--orange);
  letter-spacing: -0.02em;
}

.page-about .hero-stat:nth-child(2) .hero-stat__num,
.page-about .hero-stat:nth-child(4) .hero-stat__num {
  color: var(--cyan);
}

.page-about .hero-stat__label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--stone);
}

/* ---------- 主体双栏 ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  padding-bottom: 72px;
}

/* ---------- 左侧刻度尺 ---------- */
.page-about .about-scale {
  min-width: 0;
}

.page-about .scale-list {
  list-style: none;
  margin: 0;
  padding: 0 0 10px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .scale-item {
  display: grid;
  grid-template-columns: auto auto auto;
  gap: 8px;
  align-items: baseline;
  padding: 9px 15px;
  border: 1px solid var(--ab-line-soft);
  border-radius: var(--pill);
  text-decoration: none;
  white-space: nowrap;
  color: var(--stone);
  transition: color 200ms ease, border-color 200ms ease, background-color 200ms ease;
}

.page-about .scale-item:hover,
.page-about .scale-item:focus-visible {
  color: var(--moon);
  border-color: rgba(47, 227, 192, 0.5);
  background: rgba(47, 227, 192, 0.06);
}

.page-about .scale-mark {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--orange);
}

.page-about .scale-label {
  font-size: 14px;
  font-weight: 600;
  color: inherit;
}

.page-about .scale-ver {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--stone);
  opacity: 0.85;
}

/* ---------- 章节长卷 ---------- */
.page-about .about-chapters {
  min-width: 0;
}

.page-about .about-chapter {
  padding: 44px 0;
  border-top: 1px solid var(--ab-line-soft);
  scroll-margin-top: 96px;
}

.page-about .about-chapter:first-child {
  border-top: none;
  padding-top: 0;
}

.page-about .chapter-head {
  display: grid;
  gap: 10px;
  margin-bottom: 24px;
}

.page-about .chapter-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(23px, 4.4vw, 38px);
  line-height: 1.14;
  letter-spacing: -0.015em;
  color: var(--moon);
}

.page-about .chapter-text {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--stone);
  max-width: 64ch;
}

.page-about .chapter-text a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 227, 192, 0.4);
}

.page-about .chapter-text a:hover,
.page-about .chapter-text a:focus-visible {
  color: var(--moon);
  border-bottom-color: var(--moon);
}

.page-about .about-figure {
  margin: 24px 0 28px;
}

.page-about .about-figure--tight {
  margin: 0;
}

/* ---------- 版本时间轴 ---------- */
.page-about .ver-track {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
  display: grid;
  gap: 22px;
}

.page-about .ver-track::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan), rgba(47, 227, 192, 0.06));
}

.page-about .ver-node {
  position: relative;
  padding-left: 30px;
  display: grid;
  gap: 5px;
}

.page-about .ver-node::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(47, 227, 192, 0.08);
  transition: background-color 220ms ease, box-shadow 220ms ease;
}

.page-about .ver-node:hover::before,
.page-about .ver-node:focus-within::before {
  background: var(--cyan);
  box-shadow: 0 0 0 8px rgba(47, 227, 192, 0.16);
}

.page-about .ver-no {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-about .ver-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--moon);
  line-height: 1.4;
}

.page-about .ver-note {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--stone);
  max-width: 62ch;
}

/* ---------- 栏目形成顺序 ---------- */
.page-about .flow-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .flow-item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 14px;
  padding: 22px 0;
  border-bottom: 1px solid var(--ab-line-soft);
}

.page-about .flow-item:first-child {
  border-top: 1px solid var(--ab-line-soft);
}

.page-about .flow-no {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 24px;
  font-weight: 600;
  line-height: 1;
  color: var(--orange);
  transition: color 200ms ease;
}

.page-about .flow-item:hover .flow-no {
  color: var(--cyan);
}

.page-about .flow-name {
  margin: 0 0 6px;
  font-size: 18px;
  font-weight: 700;
  color: var(--moon);
  line-height: 1.4;
}

.page-about .flow-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--stone);
}

.page-about .flow-text a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 227, 192, 0.4);
}

.page-about .flow-text a:hover,
.page-about .flow-text a:focus-visible {
  color: var(--moon);
}

/* ---------- 团队亮区 ---------- */
.page-about .about-chapter--light {
  background: var(--lotus);
  border-radius: var(--r-lg);
  border-top: none;
  padding: 32px 20px;
  margin: 12px 0;
  color: var(--ink);
}

.page-about .about-chapter--light .chapter-title {
  color: var(--ink);
}

.page-about .about-chapter--light .eyebrow {
  color: var(--shallow);
}

.page-about .about-chapter--light .chapter-text {
  color: rgba(12, 23, 32, 0.74);
}

.page-about .team-grid {
  display: grid;
  gap: 16px;
  margin-top: 8px;
}

.page-about .team-panel {
  background: rgba(12, 23, 32, 0.06);
  border-radius: var(--r-md);
  padding: 20px 18px;
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-about .team-panel--alt {
  background: rgba(78, 124, 134, 0.16);
}

.page-about .team-panel__kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--shallow);
}

.page-about .team-panel__num {
  margin: 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  font-size: 46px;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--ink);
}

.page-about .team-duties {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .team-duties li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(12, 23, 32, 0.78);
}

.page-about .team-duties li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 7px;
  height: 1px;
  background: var(--orange);
}

.page-about .team-cadence {
  margin-top: 20px;
  margin-bottom: 0;
}

/* ---------- 刷新节奏 ---------- */
.page-about .rhythm-grid {
  display: grid;
  gap: 28px;
}

.page-about .rhythm-list {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .rhythm-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 16px 0;
  border-bottom: 1px solid var(--ab-line-soft);
}

.page-about .rhythm-item:first-child {
  border-top: 1px solid var(--ab-line-soft);
}

.page-about .rhythm-when {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  letter-spacing: 0.05em;
  color: var(--orange);
}

.page-about .rhythm-what {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--stone);
}

.page-about .rhythm-what a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 227, 192, 0.4);
}

.page-about .rhythm-what a:hover,
.page-about .rhythm-what a:focus-visible {
  color: var(--moon);
}

/* ---------- 站点所在与备案 ---------- */
.page-about .about-chapter--reg {
  border-top: 1px solid var(--ab-line);
}

.page-about .reg-block {
  padding: 20px 0;
  border-bottom: 1px solid var(--ab-line-soft);
}

.page-about .reg-label {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--stone);
}

.page-about .reg-value {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(19px, 3.6vw, 32px);
  line-height: 1.32;
  letter-spacing: -0.015em;
  color: var(--moon);
  word-break: break-word;
}

.page-about .reg-value--mono {
  font-family: var(--font-mono);
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--orange);
}

.page-about .reg-contact {
  margin: 22px 0 0;
}

.page-about .reg-contact .contact-val {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--moon);
  word-break: break-all;
}

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

/* ---------- 平板与桌面 ---------- */
@media (min-width: 768px) {
  .page-about .about-hero {
    padding: 56px 0 72px;
  }

  .page-about .hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .team-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .about-chapter--light {
    padding: 40px 32px;
  }

  .page-about .rhythm-item {
    grid-template-columns: 148px minmax(0, 1fr);
    align-items: baseline;
    gap: 18px;
  }

  .page-about .about-layout {
    padding-bottom: 96px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 64px;
    align-items: end;
  }

  .page-about .about-layout {
    grid-template-columns: 184px minmax(0, 1fr);
    gap: 56px;
  }

  .page-about .about-scale {
    position: sticky;
    top: 96px;
    align-self: start;
  }

  .page-about .scale-list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding: 0;
    border-left: 1px solid var(--ab-line);
  }

  .page-about .scale-item {
    grid-template-columns: auto minmax(0, 1fr) auto;
    gap: 12px;
    border: none;
    border-radius: 0;
    padding: 11px 10px 11px 18px;
    white-space: normal;
    position: relative;
  }

  .page-about .scale-item::before {
    content: "";
    position: absolute;
    left: -1px;
    top: 50%;
    width: 9px;
    height: 9px;
    transform: translate(-50%, -50%) rotate(45deg);
    background: var(--ink-2);
    border: 1px solid var(--shallow);
    transition: background-color 200ms ease, border-color 200ms ease, transform 200ms ease;
  }

  .page-about .scale-item:hover,
  .page-about .scale-item:focus-visible {
    background: rgba(47, 227, 192, 0.05);
  }

  .page-about .scale-item:hover::before,
  .page-about .scale-item:focus-visible::before {
    background: var(--cyan);
    border-color: var(--cyan);
    transform: translate(-50%, -50%) rotate(45deg) scale(1.15);
  }

  .page-about .about-chapter {
    padding: 56px 0;
  }

  .page-about .rhythm-grid {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 40px;
    align-items: start;
  }

  .page-about .reg-block {
    display: grid;
    grid-template-columns: 160px minmax(0, 1fr);
    gap: 20px;
    align-items: baseline;
    padding: 22px 0;
  }

  .page-about .reg-label {
    margin: 0;
  }
}

@media (min-width: 1280px) {
  .page-about .about-layout {
    grid-template-columns: 208px minmax(0, 1fr);
    gap: 72px;
  }

  .page-about .rhythm-grid {
    grid-template-columns: minmax(0, 1fr) 340px;
  }
}
<<<END>>>