.page-about {
  background: var(--snow);
  color: var(--graphite);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background: var(--ink-900);
  color: var(--snow);
  padding: clamp(44px, 7vw, 92px) 0 clamp(40px, 6vw, 76px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(128deg, rgba(217, 164, 65, 0.22) 0%, rgba(10, 26, 43, 0) 54%),
    repeating-linear-gradient(118deg, rgba(246, 248, 250, 0.045) 0 1px, transparent 1px 28px);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -14%;
  top: -34%;
  width: min(560px, 74vw);
  height: min(560px, 74vw);
  border-radius: 50%;
  background: radial-gradient(circle at 50% 50%, rgba(47, 182, 168, 0.18), rgba(47, 182, 168, 0) 64%);
  pointer-events: none;
}

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

.page-about .about-hero .breadcrumbs {
  margin: 0 0 clamp(20px, 3vw, 34px);
  color: var(--mist);
}

.page-about .about-hero .eyebrow {
  color: var(--gold-soft);
}

.page-about .about-hero h1 {
  margin: 14px 0 0;
  max-width: 17ch;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(32px, 6.4vw, 68px);
  line-height: 1.06;
  letter-spacing: -0.02em;
}

.page-about .about-hero__lede {
  margin: clamp(20px, 3vw, 30px) 0 0;
  max-width: 58ch;
  font-size: clamp(16px, 1.9vw, 18px);
  line-height: 1.8;
  color: var(--mist);
}

.page-about .hero-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(32px, 5vw, 56px);
  background: rgba(201, 214, 226, 0.22);
  border-top: 1px solid rgba(217, 164, 65, 0.5);
}

.page-about .hero-stats > div {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 16px 20px;
  background: var(--ink-900);
}

.page-about .hero-stats .num {
  font-size: clamp(26px, 3.6vw, 40px);
  line-height: 1;
  color: var(--gold);
}

.page-about .stat-label {
  font-family: var(--font-serif);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

/* ---------- 区块骨架 ---------- */
.page-about .about-section {
  padding: clamp(52px, 8vw, 96px) 0;
}

.page-about .about-section--night {
  background: var(--ink-900);
  color: var(--snow);
}

.page-about .about-section--deep {
  background: var(--ink-800);
  color: var(--snow);
}

.page-about .about-section--night .eyebrow,
.page-about .about-section--deep .eyebrow {
  color: var(--gold-soft);
}

.page-about .sec-head {
  max-width: 74ch;
}

.page-about .about-h2 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(25px, 4.4vw, 44px);
  line-height: 1.14;
  letter-spacing: -0.01em;
}

.page-about .about-section--night .about-h2,
.page-about .about-section--deep .about-h2 {
  color: var(--snow);
}

.page-about .about-lead {
  margin: 18px 0 0;
  max-width: 62ch;
  font-size: clamp(16px, 1.9vw, 18px);
  line-height: 1.8;
}

.page-about .about-section--night .about-lead,
.page-about .about-section--deep .about-lead {
  color: var(--mist);
}

/* ---------- 01 解决什么 ---------- */
.page-about .pullquote {
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 6px 0 6px clamp(16px, 2.4vw, 26px);
  border-left: 3px solid var(--gold);
  max-width: 30ch;
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(20px, 2.8vw, 30px);
  line-height: 1.5;
  color: var(--ink-800);
}

.page-about .pain {
  display: grid;
  gap: clamp(26px, 4vw, 36px);
  margin-top: clamp(30px, 5vw, 56px);
}

.page-about .pain__item h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(18px, 2.2vw, 21px);
  color: var(--ink-800);
}

.page-about .pain__item h3::before {
  content: "";
  display: block;
  width: 34px;
  height: 2px;
  margin-bottom: 12px;
  background: var(--gold);
}

.page-about .pain__item p {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--graphite);
}

/* ---------- 02 版本 ---------- */
.page-about .versions-layout {
  display: grid;
  gap: clamp(28px, 4vw, 40px);
  margin-top: clamp(30px, 4vw, 48px);
}

.page-about .versions-rail ol {
  display: flex;
  gap: 10px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
}

.page-about .versions-rail a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 8px 14px;
  border: 1px solid rgba(217, 164, 65, 0.42);
  border-radius: var(--radius);
  white-space: nowrap;
  font-size: 14px;
  color: var(--snow);
  text-decoration: none;
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .versions-rail a .num {
  font-size: 12px;
  color: var(--gold);
}

.page-about .versions-rail a:hover,
.page-about .versions-rail a:focus-visible {
  background: rgba(217, 164, 65, 0.16);
  border-color: var(--gold);
}

.page-about .versions-figure {
  margin: 0 0 clamp(26px, 3.5vw, 40px);
}

.page-about .version {
  padding: clamp(20px, 3vw, 30px) 0;
  border-top: 1px solid rgba(201, 214, 226, 0.22);
}

.page-about .version:last-child {
  border-bottom: 1px solid rgba(201, 214, 226, 0.22);
}

.page-about .version__label {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 0;
  font-family: var(--font-serif);
  font-size: 14px;
  letter-spacing: 0.12em;
  color: var(--gold-soft);
}

.page-about .version__label .num {
  font-size: 13px;
  color: var(--gold);
}

.page-about .version h3 {
  margin: 12px 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(19px, 2.4vw, 25px);
  line-height: 1.35;
  color: var(--snow);
}

.page-about .version p {
  margin: 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 03 编辑部 ---------- */
.page-about .flow-wrap {
  margin-top: clamp(30px, 4.5vw, 52px);
}

.page-about .flow-line {
  display: none;
  width: 100%;
  height: 48px;
  margin-bottom: 6px;
  color: var(--gold);
}

.page-about .flow-line polyline {
  fill: none;
  stroke: var(--gold);
  stroke-width: 1.5;
  stroke-opacity: 0.6;
}

.page-about .flow-line circle {
  fill: var(--saffron);
}

.page-about .flow {
  display: grid;
  gap: clamp(22px, 3vw, 30px);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .flow__step {
  padding-top: 18px;
  border-top: 1px solid rgba(28, 39, 51, 0.16);
}

.page-about .flow__idx {
  font-size: 13px;
  color: var(--gold);
  letter-spacing: 0.1em;
}

.page-about .flow__step h3 {
  margin: 8px 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  color: var(--ink-800);
}

.page-about .flow__step p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--graphite);
}

/* ---------- 04 数据 ---------- */
.page-about .data-layout {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
}

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

.page-about .data-steps {
  margin: clamp(24px, 3.5vw, 36px) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 20px;
}

.page-about .data-steps li {
  padding-left: 16px;
  border-left: 2px solid rgba(217, 164, 65, 0.55);
}

.page-about .data-steps__k {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-serif);
  font-size: 14px;
  letter-spacing: 0.14em;
  color: var(--gold-soft);
}

.page-about .data-steps p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .data-steps .tag {
  vertical-align: baseline;
}

/* ---------- 05 栏目地图 ---------- */
.page-about .map-figure {
  margin: clamp(26px, 3.5vw, 38px) 0 clamp(22px, 3vw, 32px);
}

.page-about .map {
  display: grid;
  gap: 1px;
  background: rgba(28, 39, 51, 0.14);
  border: 1px solid rgba(28, 39, 51, 0.14);
}

.page-about .map__cell {
  position: relative;
  padding: 20px 18px 22px;
  background: var(--snow);
  transition: background 0.24s var(--ease), color 0.24s var(--ease);
}

.page-about .map__cell:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: -3px;
}

.page-about .map__idx {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--gold);
}

.page-about .map__name {
  margin: 10px 0 4px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1.2;
  color: var(--ink-800);
  transition: color 0.24s var(--ease);
}

.page-about .map__count {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: #566573;
  transition: color 0.24s var(--ease);
}

.page-about .map__count .num {
  font-size: 15px;
  color: var(--saffron);
}

.page-about .map__subs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .map__subs li {
  padding: 4px 10px;
  border: 1px solid rgba(28, 39, 51, 0.16);
  border-radius: 999px;
  font-size: 12.5px;
  line-height: 1.7;
  color: #3c4a57;
  transition: border-color 0.24s var(--ease), color 0.24s var(--ease);
}

.page-about .map__cell:hover,
.page-about .map__cell:focus-within {
  background: var(--ink-900);
}

.page-about .map__cell:hover .map__name,
.page-about .map__cell:focus-within .map__name {
  color: var(--snow);
}

.page-about .map__cell:hover .map__count,
.page-about .map__cell:focus-within .map__count {
  color: var(--mist);
}

.page-about .map__cell:hover .map__subs li,
.page-about .map__cell:focus-within .map__subs li {
  border-color: rgba(217, 164, 65, 0.5);
  color: var(--gold-soft);
}

/* ---------- 06 合作 ---------- */
.page-about .partner-band {
  display: flex;
  gap: 12px;
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 4px 0 16px;
  list-style: none;
  overflow-x: auto;
  scroll-snap-type: x proximity;
}

.page-about .partner-band li {
  flex: 0 0 auto;
  scroll-snap-align: start;
  padding: 12px 18px;
  border: 1px solid rgba(217, 164, 65, 0.45);
  border-radius: var(--radius);
  font-family: var(--font-serif);
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--gold-soft);
  background: rgba(18, 40, 63, 0.58);
}

.page-about .partners-note {
  margin: 18px 0 0;
  max-width: 58ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 07 继续 ---------- */
.page-about .next-layout {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
}

.page-about .next-copy p {
  margin: 16px 0 0;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--graphite);
}

.page-about .next-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-content: start;
}

.page-about .next-actions .btn {
  min-height: 44px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 768px) {
  .page-about .hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .pain {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    column-gap: clamp(20px, 3vw, 36px);
    row-gap: clamp(30px, 4vw, 44px);
  }

  .page-about .pain__item:nth-child(1) {
    grid-column: 1 / 6;
  }

  .page-about .pain__item:nth-child(2) {
    grid-column: 7 / 13;
    margin-top: clamp(0px, 2.6vw, 40px);
  }

  .page-about .pain__item:nth-child(3) {
    grid-column: 3 / 11;
    margin-top: clamp(0px, 1.4vw, 20px);
  }

  .page-about .flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(24px, 3vw, 36px);
  }

  .page-about .map {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-about .map__cell--wide {
    grid-column: span 3;
  }

  .page-about .map__cell {
    grid-column: span 2;
  }

  .page-about .map__subs {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    margin-top: 0;
    transition: max-height 0.3s var(--ease), opacity 0.2s var(--ease), margin-top 0.3s var(--ease);
  }

  .page-about .map__cell:hover .map__subs,
  .page-about .map__cell:focus-within .map__subs {
    max-height: 320px;
    opacity: 1;
    margin-top: 14px;
  }

  .page-about .next-layout {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .page-about .versions-layout {
    grid-template-columns: 200px minmax(0, 1fr);
    column-gap: clamp(40px, 5vw, 72px);
    align-items: start;
  }

  .page-about .versions-rail {
    position: sticky;
    top: calc(var(--header-h) + 32px);
  }

  .page-about .versions-rail ol {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding: 0;
    border-left: 1px solid rgba(217, 164, 65, 0.38);
  }

  .page-about .versions-rail a {
    display: flex;
    width: 100%;
    border: 0;
    border-radius: 0;
    padding: 12px 14px;
    min-height: 46px;
    color: var(--mist);
  }

  .page-about .versions-rail a:hover,
  .page-about .versions-rail a:focus-visible {
    background: rgba(217, 164, 65, 0.14);
    color: var(--snow);
  }

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

  .page-about .flow-line {
    display: block;
  }

  .page-about .data-layout {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    column-gap: clamp(36px, 5vw, 64px);
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .map__subs,
  .page-about .map__cell,
  .page-about .map__name,
  .page-about .map__count,
  .page-about .map__subs li,
  .page-about .versions-rail a {
    transition: none;
  }
}
<<<END>>>