.page-about {
  --about-aside-w: 264px;
  display: block;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: 20px;
  padding-bottom: 8px;
}
.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  padding: 32px 0 40px;
  position: relative;
}
.page-about .about-hero__grid::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--c-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--c-grid) 1px, transparent 1px);
  background-size: 48px 48px;
  background-position: -1px -1px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0,0,0,.9), transparent 78%);
  mask-image: linear-gradient(180deg, rgba(0,0,0,.9), transparent 78%);
  pointer-events: none;
}
.page-about .about-hero__text,
.page-about .about-hero__art {
  position: relative;
  z-index: 1;
}
.page-about .about-hero h1 {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--c-ink);
  margin: 10px 0 0;
  max-width: 16em;
}
.page-about .about-hero__lead {
  margin-top: 18px;
  max-width: 40em;
  font-size: 1.03rem;
  line-height: 1.9;
  color: var(--c-ink-soft);
}
.page-about .about-hero__points {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.page-about .about-hero__points li {
  position: relative;
  padding-left: 46px;
  font-size: .95rem;
  line-height: 1.75;
  color: var(--c-ink);
}
.page-about .about-hero__points li::before {
  content: "";
  position: absolute;
  left: 18px;
  top: 12px;
  width: 12px;
  height: 1px;
  background: var(--c-snow);
  box-shadow: 0 6px 0 var(--c-gold);
}
.page-about .about-hero__points .mono-num {
  font-family: var(--font-mono);
  color: var(--c-snow-deep);
  font-weight: 700;
  letter-spacing: .04em;
}

/* 首屏视觉 */
.page-about .about-hero__art {
  display: flex;
  flex-direction: column;
  gap: 14px;
  align-self: center;
}
.page-about .hero-grid-art {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  padding: 18px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-m);
  background: var(--c-white);
  box-shadow: var(--shadow-1);
}
.page-about .hero-grid-art__cell {
  aspect-ratio: 1 / 1;
  border-radius: 8px;
  background: var(--c-snow-soft);
  border: 1px solid var(--c-line-soft);
}
.page-about .hero-grid-art__cell--snow {
  background: var(--c-snow);
  border-color: var(--c-snow);
}
.page-about .hero-grid-art__cell--gold {
  background: var(--c-gold);
  border-color: var(--c-gold);
}
.page-about .hero-grid-art__cell--grape {
  background: var(--c-grape);
  border-color: var(--c-grape);
}
.page-about .hero-grid-art__caption {
  text-align: center;
  color: var(--c-ink-faint);
}

/* ---------- 双栏骨架 ---------- */
.page-about .about-shell {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  padding: 12px 0 72px;
}
.page-about .about-aside__inner {
  display: grid;
  gap: 22px;
}
.page-about .about-aside__label {
  color: var(--c-ink-faint);
  padding-bottom: 10px;
  border-bottom: 1px solid var(--c-line);
}
.page-about .about-index {
  display: grid;
  gap: 2px;
}
.page-about .about-index__link {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--radius-s);
  color: var(--c-ink-soft);
  text-decoration: none;
  font-size: .92rem;
  border-left: 2px solid transparent;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease),
              border-color var(--dur) var(--ease);
}
.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  background: var(--c-gold-mist);
  color: var(--c-ink);
  border-left-color: var(--c-gold);
  outline: none;
}
.page-about .about-index__num {
  color: var(--c-grape);
  font-size: .78rem;
  font-weight: 700;
}

/* 关键数字 */
.page-about .about-figures {
  margin: 0;
  display: grid;
  gap: 10px;
  border-top: 1px solid var(--c-line);
  padding-top: 18px;
}
.page-about .about-figure {
  position: relative;
  padding: 10px 12px;
  border-radius: var(--radius-s);
  border: 1px solid var(--c-line-soft);
  background: var(--c-white);
  cursor: help;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.page-about .about-figure:hover,
.page-about .about-figure:focus-visible {
  border-color: var(--c-snow);
  box-shadow: var(--shadow-1);
  outline: none;
}
.page-about .about-figure__label {
  font-size: .78rem;
  color: var(--c-ink-faint);
  letter-spacing: .04em;
}
.page-about .about-figure__value {
  margin: 2px 0 0;
  display: flex;
  align-items: baseline;
  gap: 4px;
}
.page-about .about-figure__num {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--c-snow-deep);
  letter-spacing: .02em;
  line-height: 1.1;
}
.page-about .about-figure__unit {
  font-size: .82rem;
  color: var(--c-ink-soft);
}
.page-about .about-figure__tip {
  margin: 6px 0 0;
  font-size: .76rem;
  line-height: 1.6;
  color: var(--c-ink-faint);
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height 220ms var(--ease), opacity 220ms var(--ease), margin 220ms var(--ease);
}
.page-about .about-figure:hover .about-figure__tip,
.page-about .about-figure:focus-visible .about-figure__tip {
  max-height: 6em;
  opacity: 1;
}

/* ---------- 正文分段 ---------- */
.page-about .about-body {
  display: grid;
  gap: 64px;
  min-width: 0;
}
.page-about .about-block {
  scroll-margin-top: var(--header-offset);
}
.page-about .about-block .section-head {
  margin-bottom: 28px;
}

/* 故事卡片错落 */
.page-about .story-cards {
  display: grid;
  gap: 18px;
}
.page-about .story-card {
  padding: 24px;
  position: relative;
}
.page-about .story-card h3 {
  font-family: var(--font-heading);
  font-size: 1.08rem;
  font-weight: 600;
  line-height: 1.55;
  margin: 10px 0 10px;
  color: var(--c-ink);
}
.page-about .story-card p {
  margin: 0;
  font-size: .94rem;
  line-height: 1.85;
  color: var(--c-ink-soft);
}
.page-about .story-card--offset {
  background: var(--c-snow-soft);
  border-color: transparent;
}
.page-about .story-card--offset:hover {
  border-color: var(--c-snow);
}

/* 图片 */
.page-about .about-media {
  margin: 0 0 26px;
}
.page-about .about-media .media__frame {
  border-radius: var(--radius-m);
  overflow: hidden;
  border: 1px solid var(--c-line);
  background: var(--c-snow-soft);
}
.page-about .about-media .media__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .about-media .media__caption {
  margin-top: 10px;
  color: var(--c-ink-faint);
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .04em;
}

/* 班次时间条 */
.page-about .shift-block {
  margin-bottom: 26px;
}
.page-about .shift-bar {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 4px;
  background: var(--c-white);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-m);
}
.page-about .shift-bar__seg {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 16px;
  border-radius: var(--radius-s);
  background: var(--c-snow-soft);
  border-left: 3px solid var(--c-snow);
}
.page-about .shift-bar__seg--gold {
  background: var(--c-gold-mist);
  border-left-color: var(--c-gold);
}
.page-about .shift-bar__seg b {
  font-family: var(--font-heading);
  font-size: .95rem;
  color: var(--c-ink);
}
.page-about .shift-bar__seg em {
  font-style: normal;
  font-family: var(--font-mono);
  font-size: .82rem;
  letter-spacing: .04em;
  color: var(--c-ink-soft);
}
.page-about .shift-block__note {
  margin: 12px 0 0;
  font-size: .9rem;
  line-height: 1.8;
  color: var(--c-ink-soft);
}

/* 能力数字卡 */
.page-about .about-facts {
  gap: 16px;
}
.page-about .fact-card {
  padding: 20px;
}
.page-about .fact-card h3 {
  font-size: 1rem;
  margin: 8px 0 8px;
  color: var(--c-ink);
}
.page-about .fact-card p {
  margin: 0;
  font-size: .9rem;
  line-height: 1.8;
  color: var(--c-ink-soft);
}
.page-about .fact-card b.mono-num {
  font-family: var(--font-mono);
  color: var(--c-snow-deep);
  font-size: 1.02rem;
}

/* ---------- 覆盖点阵 ---------- */
.page-about .coverage-layout {
  margin-bottom: 26px;
}
.page-about .coverage-map {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(128px, 1fr));
  gap: 12px;
  padding: 20px;
  background-color: var(--c-white);
  background-image:
    linear-gradient(var(--c-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--c-grid) 1px, transparent 1px);
  background-size: 40px 40px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-m);
}
.page-about .coverage-dot {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border-radius: 999px;
  background: var(--c-white);
  border: 1px solid var(--c-line-soft);
  font-size: .82rem;
  color: var(--c-ink);
  cursor: default;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.page-about .coverage-dot:hover,
.page-about .coverage-dot:focus-visible {
  border-color: var(--c-gold);
  background: var(--c-gold-mist);
  outline: none;
}
.page-about .coverage-dot__mark {
  flex: 0 0 auto;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--c-snow);
  box-shadow: 0 0 0 3px var(--c-snow-soft);
}
.page-about .coverage-dot:nth-child(4n) .coverage-dot__mark {
  background: var(--c-gold);
  box-shadow: 0 0 0 3px var(--c-gold-mist);
}
.page-about .coverage-dot__name {
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.page-about .coverage-legend {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
  font-size: .84rem;
  line-height: 1.7;
  color: var(--c-ink-soft);
}
.page-about .coverage-legend li {
  display: flex;
  align-items: center;
  gap: 10px;
}
.page-about .coverage-legend__key {
  flex: 0 0 auto;
  width: 12px;
  height: 12px;
  border-radius: 50%;
}
.page-about .coverage-legend__key--snow {
  background: var(--c-snow);
}
.page-about .coverage-legend__key--gold {
  background: var(--c-gold);
}

/* ---------- 认证徽标 ---------- */
.page-about .badge-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-bottom: 26px;
}
.page-about .badge-item {
  position: relative;
  padding: 22px 20px 20px;
  background: var(--c-white);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-m);
  border-top: 3px solid var(--c-snow);
}
.page-about .badge-item:nth-child(2) {
  border-top-color: var(--c-gold);
}
.page-about .badge-item:nth-child(3) {
  border-top-color: var(--c-grape);
}
.page-about .badge-item__mark {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .08em;
  color: var(--c-ink-faint);
  padding: 3px 8px;
  border: 1px solid var(--c-line);
  border-radius: 999px;
}
.page-about .badge-item h3 {
  font-family: var(--font-heading);
  font-size: 1.02rem;
  margin: 12px 0 8px;
  color: var(--c-ink);
}
.page-about .badge-item p {
  margin: 0;
  font-size: .9rem;
  line-height: 1.8;
  color: var(--c-ink-soft);
}

/* 协作路径 */
.page-about .paths {
  display: grid;
  gap: 16px;
}
.page-about .path-card {
  padding: 20px;
  border-left: 3px solid var(--c-snow-soft);
}
.page-about .path-card:hover {
  border-left-color: var(--c-snow);
}
.page-about .path-card h3 {
  font-size: 1rem;
  margin: 0 0 8px;
  color: var(--c-ink);
}
.page-about .path-card p {
  margin: 0;
  font-size: .9rem;
  line-height: 1.8;
  color: var(--c-ink-soft);
}

/* ---------- 三条约定 ---------- */
.page-about .promise-list {
  list-style: none;
  margin: 0 0 32px;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--c-line);
}
.page-about .promise-item {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 16px;
  padding: 22px 4px;
  border-bottom: 1px solid var(--c-line);
  transition: background var(--dur) var(--ease);
}
.page-about .promise-item:hover {
  background: var(--c-gold-mist);
}
.page-about .promise-item__num {
  font-family: var(--font-mono);
  font-size: .95rem;
  font-weight: 700;
  color: var(--c-grape);
  letter-spacing: .04em;
  padding-top: 3px;
}
.page-about .promise-item__body h3 {
  font-family: var(--font-heading);
  font-size: 1.04rem;
  margin: 0 0 8px;
  color: var(--c-ink);
}
.page-about .promise-item__body p {
  margin: 0;
  font-size: .92rem;
  line-height: 1.85;
  color: var(--c-ink-soft);
}

/* CTA 条 */
.page-about .about-cta {
  display: grid;
  gap: 18px;
  padding: 26px;
  border-radius: var(--radius-l);
  background: var(--c-snow-soft);
  border: 1px solid var(--c-line-soft);
}
.page-about .about-cta__text h3 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  margin: 0 0 8px;
  color: var(--c-ink);
}
.page-about .about-cta__text p {
  margin: 0;
  font-size: .92rem;
  line-height: 1.8;
  color: var(--c-ink-soft);
}
.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .story-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .badge-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .paths {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .shift-bar {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-cta {
    grid-template-columns: 1fr auto;
    align-items: center;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: center;
    gap: 48px;
    padding: 44px 0 56px;
  }
  .page-about .story-cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }
  .page-about .story-card--offset {
    margin-top: 28px;
  }
  .page-about .about-facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .badge-row {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .paths {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .page-about .about-shell {
    grid-template-columns: var(--about-aside-w) minmax(0, 1fr);
    gap: 56px;
  }
  .page-about .about-aside__inner {
    position: sticky;
    top: var(--header-offset);
  }
}

@media (max-width: 420px) {
  .page-about .coverage-map {
    grid-template-columns: 1fr;
  }
  .page-about .promise-item {
    grid-template-columns: 1fr;
    gap: 8px;
  }
  .page-about .about-cta__actions .btn {
    width: 100%;
    justify-content: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition: none !important;
  }
}
<<<END>>>