.page-about {
  --about-glow: radial-gradient(120% 90% at 78% -10%, rgba(15, 59, 51, .92), rgba(7, 26, 22, 0) 62%);
  display: block;
}

/* ---------- 面包屑 ---------- */
.page-about .crumb-sep {
  margin: 0 8px;
  color: var(--graphite);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(84px, 12vw, 160px) 0 clamp(32px, 5vw, 60px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -140px 0 0 0;
  background: var(--about-glow);
  pointer-events: none;
  z-index: 0;
}

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

.page-about .about-hero .eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-about .about-hero h1 {
  margin: 16px 0 0;
  max-width: 14ch;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(40px, 11vw, 104px);
  line-height: .96;
  letter-spacing: -.02em;
  color: var(--chalk);
}

.page-about .about-hero .lede {
  margin: clamp(18px, 3vw, 28px) 0 0;
  max-width: 46ch;
  font-size: clamp(16px, 2.2vw, 18px);
  line-height: 1.8;
  color: var(--mute);
}

.page-about .about-hero-foot {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-end;
  gap: 22px;
  margin-top: clamp(32px, 5vw, 56px);
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.page-about .about-hero-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 26px;
  flex: 1 1 300px;
}

.page-about .about-hero-stats .stat-value {
  display: block;
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  line-height: 1.05;
  color: var(--chalk);
}

.page-about .about-hero-stats .stat:nth-child(1) .stat-value {
  color: var(--lime);
}

.page-about .about-hero-stats .stat:nth-child(3) .stat-value {
  color: var(--gold);
}

.page-about .about-hero-stats .stat-label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--mute);
}

.page-about .about-index {
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--mute);
  white-space: nowrap;
}

/* ---------- 章节基础 ---------- */
.page-about .section {
  padding: clamp(44px, 6.5vw, 88px) 0;
}

.page-about .section-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-about .section-title {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(28px, 4.6vw, 46px);
  line-height: 1.06;
  letter-spacing: -.02em;
  color: var(--chalk);
}

.page-about .section-head .lede {
  margin: 16px 0 0;
  max-width: 56ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--mute);
}

.page-about .section-head {
  margin-bottom: clamp(26px, 4vw, 46px);
}

.page-about .grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 26px;
}

.page-about .col-4,
.page-about .col-5,
.page-about .col-7,
.page-about .col-12 {
  grid-column: 1 / -1;
}

.page-about p {
  line-height: 1.8;
}

/* ---------- 01 立场 ---------- */
.page-about .about-who-body p {
  margin: 0 0 18px;
  color: var(--mute);
  font-size: 16px;
}

.page-about .about-who-body p:first-child {
  color: var(--chalk);
  font-size: 17px;
}

.page-about .about-who-body p:last-child {
  margin-bottom: 0;
  padding-left: 16px;
  border-left: 2px solid var(--line-gold);
  color: var(--chalk);
}

/* ---------- 02 时间轴 ---------- */
.page-about .about-timeline {
  position: relative;
  margin: 0;
  padding: 0 0 0 0;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(180deg, var(--lime), var(--gold) 55%, rgba(233, 180, 76, 0) 100%);
  opacity: .55;
}

.page-about .about-node {
  position: relative;
  padding-left: 36px;
  margin-bottom: 12px;
}

.page-about .about-node::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 24px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 0 5px rgba(200, 240, 75, .12);
}

.page-about .about-node summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  list-style: none;
  cursor: pointer;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--char);
  transition: border-color .25s ease, background .25s ease, transform .25s ease;
}

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

.page-about .about-node summary::after {
  content: "＋";
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--lime);
  line-height: 1;
}

.page-about .about-node details[open] > summary {
  border-color: var(--line-lime);
  background: linear-gradient(140deg, rgba(15, 59, 51, .75), var(--char));
}

.page-about .about-node details[open] > summary::after {
  content: "－";
}

.page-about .about-node summary:hover {
  border-color: var(--line-lime);
  transform: translateX(3px);
}

.page-about .about-node-index {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  color: rgba(230, 234, 230, .26);
}

.page-about .about-node-main {
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 0;
}

.page-about .about-node-time {
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-about .about-node-title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 17px;
  line-height: 1.3;
  color: var(--chalk);
}

.page-about .about-node .expand-body {
  padding: 14px 18px 6px 4px;
  color: var(--mute);
  font-size: 15.5px;
}

.page-about .about-node .expand-body p {
  margin: 0;
}

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

.page-about .about-figure img,
.page-about .about-archive-media img,
.page-about .about-city-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--r-lg);
}

.page-about .about-figure img {
  margin-top: 18px;
}

.page-about .media-caption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mute);
}

/* ---------- 03 校对席 ---------- */
.page-about .about-check-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .about-check-card {
  padding: 26px 24px 28px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(160deg, rgba(15, 59, 51, .6), rgba(14, 18, 17, .95));
}

.page-about .about-check-num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 44px;
  font-weight: 700;
  line-height: 1;
  color: var(--lime);
}

.page-about .about-check-card:nth-child(2) .about-check-num {
  color: var(--gold);
}

.page-about .about-check-card:nth-child(3) .about-check-num {
  color: var(--chart);
}

.page-about .about-check-unit {
  margin-left: 6px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: .04em;
  color: var(--mute);
}

.page-about .about-check-title {
  margin: 14px 0 10px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 20px;
  color: var(--chalk);
}

.page-about .about-check-card p:last-child {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mute);
}

/* ---------- 04 覆盖范围 ---------- */
.page-about .about-cover-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-bottom: clamp(26px, 4vw, 40px);
}

.page-about .about-cover-stat {
  padding: 20px 18px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--char);
}

.page-about .about-cover-value {
  display: block;
  font-family: var(--font-mono);
  font-size: 34px;
  font-weight: 700;
  line-height: 1.05;
  color: var(--chalk);
}

.page-about .about-cover-stat:nth-child(2) .about-cover-value {
  color: var(--lime);
}

.page-about .about-cover-stat:nth-child(3) .about-cover-value {
  color: var(--gold);
}

.page-about .about-cover-label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--mute);
}

.page-about .about-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
  color: var(--chalk);
}

.page-about .about-table-caption {
  padding: 0 0 12px;
  text-align: left;
  font-size: 13px;
  color: var(--mute);
}

.page-about .about-table th,
.page-about .about-table td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
  line-height: 1.75;
}

.page-about .about-table thead th {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--mute);
  border-bottom-color: var(--line-strong);
}

.page-about .about-table tbody th {
  white-space: nowrap;
  font-weight: 700;
  color: var(--lime);
}

.page-about .about-table tbody tr:nth-child(even) {
  background: rgba(28, 36, 34, .5);
}

.page-about .about-archive-media {
  margin: clamp(28px, 4vw, 46px) 0 0;
}

.page-about .about-archive-media img {
  border-radius: var(--r-xl);
}

/* ---------- 05 岗位 ---------- */
.page-about .about-role-bar {
  display: flex;
  gap: 4px;
  height: 26px;
  margin: 6px 0 clamp(24px, 3.5vw, 36px);
}

.page-about .about-role-seg {
  flex: 1 1 0;
  border-radius: var(--r-pill);
}

.page-about .about-role-seg--editor {
  flex-grow: 12;
  background: linear-gradient(90deg, var(--lime), #9dc832);
}

.page-about .about-role-seg--data {
  flex-grow: 9;
  background: linear-gradient(90deg, var(--gold), #c08f2c);
}

.page-about .about-role-seg--product {
  flex-grow: 4;
  background: linear-gradient(90deg, var(--chart), #2d6474);
}

.page-about .about-role-seg--ops {
  flex-grow: 3;
  background: linear-gradient(90deg, #4a5852, #262f2c);
}

.page-about .about-role-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-role-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 6px 12px;
  padding: 18px 4px;
  border-top: 1px solid var(--line);
}

.page-about .about-role-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  transform: translateY(-1px);
}

.page-about .about-role-dot--editor { background: var(--lime); }
.page-about .about-role-dot--data { background: var(--gold); }
.page-about .about-role-dot--product { background: var(--chart); }
.page-about .about-role-dot--ops { background: #4a5852; }

.page-about .about-role-name {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 18px;
  color: var(--chalk);
}

.page-about .about-role-num {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  color: var(--lime);
}

.page-about .about-role-desc {
  grid-column: 2 / -1;
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mute);
}

/* ---------- 06 版本 ---------- */
.page-about .about-version-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .about-version {
  position: relative;
  overflow: hidden;
  padding: 26px 24px 28px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--char);
}

.page-about .about-version::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
}

.page-about .about-version--v1::before { background: linear-gradient(90deg, var(--chart), rgba(63, 143, 163, 0)); }
.page-about .about-version--v2::before { background: linear-gradient(90deg, var(--gold), rgba(233, 180, 76, 0)); }
.page-about .about-version--v3::before { background: linear-gradient(90deg, var(--lime), rgba(200, 240, 75, 0)); }

.page-about .about-version-era {
  margin: 0;
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--mute);
}

.page-about .about-version-title {
  margin: 12px 0 16px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 21px;
  line-height: 1.25;
  color: var(--chalk);
}

.page-about .about-version-list {
  margin: 0 0 16px;
  padding: 0;
  list-style: none;
}

.page-about .about-version-list li {
  position: relative;
  padding: 6px 0 6px 18px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--mute);
}

.page-about .about-version-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 15px;
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background: var(--gold);
}

.page-about .about-version--v3 .about-version-list li::before {
  background: var(--lime);
}

.page-about .about-version-note {
  margin: 0;
  padding-top: 14px;
  border-top: 1px dashed var(--line-strong);
  font-size: 14px;
  line-height: 1.75;
  color: var(--mute);
}

/* ---------- 07 太原 ---------- */
.page-about .about-city-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  align-items: center;
}

.page-about .about-city-media {
  margin: 0;
}

.page-about .about-city-media img {
  border-radius: var(--r-xl);
}

.page-about .about-city-copy p {
  margin: 16px 0 0;
  font-size: 16px;
  color: var(--mute);
}

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

.page-about .about-crosslinks {
  margin-top: 20px;
  font-size: 14px;
  color: var(--mute);
}

.page-about .about-crosslinks a {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid var(--line-lime);
}

.page-about .about-crosslinks a:hover {
  border-bottom-color: var(--lime);
}

/* ---------- 响应式 ---------- */
@media (min-width: 600px) {
  .page-about .about-hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (min-width: 780px) {
  .page-about .about-check-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .col-4 { grid-column: span 4; }
  .page-about .col-5 { grid-column: span 5; }
  .page-about .col-7 { grid-column: span 7; }
  .page-about .col-12 { grid-column: span 12; }

  .page-about .grid {
    gap: 34px;
  }

  .page-about .about-flow-media {
    position: sticky;
    top: 108px;
    align-self: start;
  }

  .page-about .about-role-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 34px;
  }

  .page-about .about-role-item:nth-child(1),
  .page-about .about-role-item:nth-child(2) {
    border-top-color: var(--line-strong);
  }

  .page-about .about-version-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .about-city-grid {
    grid-template-columns: 5fr 7fr;
    gap: 40px;
  }
}

@media (min-width: 1100px) {
  .page-about .about-hero h1 {
    max-width: 16ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-node summary,
  .page-about .about-node summary:hover {
    transition: none;
    transform: none;
  }
}
</final>
</final>