.page-about {
  --about-pad: 20px;
  --about-muted: rgba(245, 241, 232, 0.74);
  --about-faint: rgba(245, 241, 232, 0.52);
  --about-line: 1px solid rgba(183, 192, 196, 0.18);
  background: var(--night-blue);
  color: var(--light-white);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about * {
  box-sizing: border-box;
}

.page-about .about-shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--about-pad);
}

.page-about a:focus-visible,
.page-about button:focus-visible {
  outline: 2px solid var(--card-yellow);
  outline-offset: 3px;
}

/* 面包屑 */
.page-about .breadcrumb {
  padding-top: 18px;
  font-size: var(--step-1);
  letter-spacing: 0.08em;
}

.page-about .breadcrumb ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  color: var(--metal-silver);
}

.page-about .breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--line-graphite);
}

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

.page-about .breadcrumb a:hover {
  text-decoration: underline;
}

/* 首屏 */
.page-about .about-hero {
  position: relative;
  padding-bottom: 40px;
  background:
    radial-gradient(120% 90% at 88% -10%, rgba(79, 209, 197, 0.16), transparent 62%),
    linear-gradient(165deg, var(--stand-green) 0%, var(--night-blue) 78%);
  border-bottom: var(--about-line);
}

.page-about .about-hero-grid {
  display: grid;
  gap: 30px;
  padding-top: 26px;
}

.page-about .about-eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: var(--step-1);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--card-yellow);
}

.page-about h1 {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(34px, 8vw, 84px);
  line-height: 1.02;
  letter-spacing: -0.04em;
  color: var(--light-white);
  max-width: 15em;
}

.page-about .about-lede {
  margin: 0;
  max-width: 46em;
  font-size: clamp(15px, 1.6vw, 19px);
  line-height: 1.78;
  color: var(--about-muted);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  margin: 0;
  border-top: var(--about-line);
}

.page-about .about-stat {
  padding: 14px 12px 14px 0;
  border-bottom: var(--about-line);
}

.page-about .about-stat dt {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--metal-silver);
  margin-bottom: 6px;
}

.page-about .about-stat dd {
  margin: 0;
  font-size: clamp(22px, 4vw, 30px);
  line-height: 1;
  color: var(--light-white);
}

/* 整幅看台图 */
.page-about .about-bleed {
  position: relative;
  margin: 0;
  border-bottom: var(--about-line);
  background: var(--stand-green);
}

.page-about .about-bleed img {
  display: block;
  width: 100%;
  height: clamp(200px, 46vw, 520px);
  object-fit: cover;
  filter: saturate(0.92) contrast(1.04);
}

.page-about .about-bleed figcaption {
  position: absolute;
  left: var(--about-pad);
  bottom: 18px;
  right: var(--about-pad);
  padding: 12px 14px;
  max-width: 34em;
  font-size: 13px;
  line-height: 1.7;
  color: var(--light-white);
  background: linear-gradient(90deg, rgba(6, 23, 35, 0.86), rgba(6, 23, 35, 0.42));
  border-left: 3px solid var(--card-yellow);
}

.page-about .about-bleed figcaption .mono {
  display: block;
  margin-bottom: 4px;
  color: var(--card-yellow);
  letter-spacing: 0.16em;
  font-size: 11px;
}

/* 通用区块 */
.page-about .about-section {
  padding-block: 46px;
  border-bottom: var(--about-line);
}

.page-about .about-section--green {
  background: linear-gradient(180deg, var(--stand-green), rgba(10, 53, 42, 0.86));
}

.page-about .about-kicker {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: var(--step-1);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--screen-cyan);
}

.page-about .about-kicker .mono {
  color: var(--card-yellow);
  letter-spacing: 0.1em;
}

.page-about h2 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(24px, 4.4vw, 44px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--light-white);
  max-width: 22em;
}

.page-about h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 500;
  line-height: 1.4;
  color: var(--light-white);
}

.page-about .about-prose p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.82;
  color: var(--about-muted);
  max-width: 34em;
}

.page-about .about-prose--lead {
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-muted);
  max-width: 34em;
}

/* 分栏 */
.page-about .about-split {
  display: grid;
  gap: 28px;
}

.page-about .about-col {
  min-width: 0;
}

/* 牌色标记 */
.page-about .about-marks {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin: 20px 0 0;
  padding: 14px 0 0;
  border-top: var(--about-line);
  list-style: none;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--metal-silver);
}

.page-about .about-marks li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.page-about .about-mark {
  width: 10px;
  height: 14px;
  border-radius: 1px;
  display: inline-block;
}

.page-about .about-mark--yellow {
  background: var(--card-yellow);
}

.page-about .about-mark--red {
  background: var(--card-red);
}

.page-about .about-mark--cyan {
  background: var(--screen-cyan);
}

/* 索引 */
.page-about .about-index {
  margin-top: 24px;
  border-top: var(--about-line);
  padding-top: 14px;
}

.page-about .about-index-title {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--metal-silver);
}

.page-about .about-index ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-index a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  border-bottom: var(--about-line);
  min-height: 44px;
  color: var(--about-muted);
  text-decoration: none;
  font-size: 14px;
  transition: color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}

.page-about .about-index a .mono {
  color: var(--card-yellow);
  font-size: 11px;
  letter-spacing: 0.1em;
  min-width: 2.4em;
}

.page-about .about-index a:hover,
.page-about .about-index a:focus-visible {
  color: var(--screen-cyan);
  padding-left: 6px;
}

/* 引语 */
.page-about .about-quote {
  border: var(--about-line);
  border-left: 3px solid var(--card-red);
  background: rgba(107, 31, 27, 0.22);
  padding: 20px;
  margin-bottom: 24px;
}

.page-about .about-quote-text {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(19px, 2.6vw, 26px);
  line-height: 1.5;
  letter-spacing: -0.01em;
  color: var(--light-white);
}

.page-about .about-quote-note {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--card-yellow);
}

/* 图片 */
.page-about .about-figure {
  margin: 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border: var(--about-line);
}

.page-about .about-figure--tilt img {
  aspect-ratio: 4 / 3;
  clip-path: polygon(0 0, 100% 3%, 100% 100%, 0 97%);
}

.page-about .about-figure--tall img {
  aspect-ratio: 5 / 6;
}

.page-about .about-caption {
  margin: 10px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--about-faint);
  border-left: 1px solid var(--line-graphite);
  padding-left: 10px;
}

/* 提供内容列表 */
.page-about .about-list {
  border-top: var(--about-line);
}

.page-about .about-list-item {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 4px 16px;
  padding: 20px 0;
  border-bottom: var(--about-line);
  transition: background var(--dur) var(--ease);
}

.page-about .about-list-num {
  grid-row: span 2;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--screen-cyan);
  padding-top: 4px;
}

.page-about .about-list-item h3 {
  margin: 0;
}

.page-about .about-list-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--about-muted);
  max-width: 46em;
}

/* 流程卡 */
.page-about .about-flow {
  display: grid;
  gap: 12px;
  margin-top: 22px;
}

.page-about .about-flow-step {
  position: relative;
  padding: 16px 18px;
  background: rgba(30, 107, 78, 0.2);
  border: var(--about-line);
  border-left: 3px solid var(--pitch-green);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.22);
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-flow-step:nth-child(2) {
  border-left-color: var(--screen-cyan);
}

.page-about .about-flow-step:nth-child(3) {
  border-left-color: var(--card-yellow);
}

.page-about .about-flow-step:nth-child(4) {
  border-left-color: var(--card-red);
}

.page-about .about-flow-step:hover {
  transform: translateY(-2px);
  background: rgba(30, 107, 78, 0.32);
}

.page-about .about-flow-num {
  margin: 0 0 6px;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--metal-silver);
}

.page-about .about-flow-step h3 {
  margin: 0 0 6px;
  font-size: 16px;
}

.page-about .about-flow-step p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--about-muted);
}

/* 侧注卡 */
.page-about .about-note-card {
  border: var(--about-line);
  background: rgba(6, 23, 35, 0.42);
  padding: 18px;
}

.page-about .about-note-title {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--card-yellow);
}

.page-about .about-note-card p {
  margin: 0 0 12px;
  font-size: 13.5px;
  line-height: 1.78;
  color: var(--about-muted);
}

.page-about .about-note-foot {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--metal-silver);
  border-top: var(--about-line);
  padding-top: 10px;
}

/* 覆盖规模 */
.page-about .about-section--coverage {
  background: var(--stand-green);
  border-block: var(--about-line);
}

.page-about .about-kpi {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 14px;
  margin-bottom: 26px;
}

.page-about .about-kpi-item {
  border-top: 2px solid var(--card-yellow);
  padding-top: 10px;
}

.page-about .about-kpi-num {
  display: block;
  font-size: clamp(28px, 5vw, 48px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--light-white);
}

.page-about .about-kpi-label {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--metal-silver);
}

.page-about .about-cat-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.page-about .about-cat {
  border: var(--about-line);
  background: rgba(6, 23, 35, 0.38);
  padding: 14px;
}

.page-about .about-cat .mono {
  display: block;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--card-yellow);
  margin-bottom: 6px;
}

.page-about .about-cat h3 {
  margin: 0 0 6px;
  font-size: 15px;
}

.page-about .about-cat p {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--about-muted);
}

.page-about .about-cat-foot {
  margin: 20px 0 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--metal-silver);
  border-left: 3px solid var(--screen-cyan);
  padding-left: 12px;
}

/* 团队 */
.page-about .about-roles {
  display: grid;
  gap: 10px;
  margin-top: 6px;
}

.page-about .about-role {
  border: var(--about-line);
  background: rgba(245, 241, 232, 0.035);
  padding: 16px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.16);
}

.page-about .about-role-tag {
  display: inline-block;
  margin-bottom: 10px;
  padding: 3px 8px;
  font-size: 10px;
  letter-spacing: 0.18em;
  border-radius: var(--radius);
  color: var(--night-blue);
}

.page-about .about-role-tag--green {
  background: var(--pitch-green);
  color: var(--light-white);
}

.page-about .about-role-tag--yellow {
  background: var(--card-yellow);
}

.page-about .about-role-tag--cyan {
  background: var(--screen-cyan);
}

.page-about .about-role-tag--red {
  background: var(--card-red);
  color: var(--light-white);
}

.page-about .about-role h3 {
  margin: 0 0 6px;
  font-size: 16px;
}

.page-about .about-role p {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--about-muted);
}

.page-about .about-shifts {
  display: grid;
  margin-top: 22px;
  border: var(--about-line);
}

.page-about .about-shift {
  padding: 14px 16px;
  border-bottom: var(--about-line);
}

.page-about .about-shift:last-child {
  border-bottom: 0;
}

.page-about .about-shift .mono {
  display: block;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--card-yellow);
  margin-bottom: 4px;
}

.page-about .about-shift p {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--about-muted);
}

/* 时间轴 */
.page-about .about-timeline {
  display: flex;
  gap: 0;
  overflow-x: auto;
  padding: 4px 0 14px;
  margin-top: 10px;
  border-top: 2px solid var(--line-graphite);
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-tl-item {
  position: relative;
  flex: 0 0 74%;
  max-width: 300px;
  padding: 22px 18px 0 0;
  scroll-snap-align: start;
}

.page-about .about-tl-item::before {
  content: "";
  position: absolute;
  top: -6px;
  left: 0;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--card-yellow);
  box-shadow: 0 0 0 3px rgba(244, 196, 48, 0.16);
}

.page-about .about-tl-item:nth-child(3)::before {
  background: var(--screen-cyan);
  box-shadow: 0 0 0 3px rgba(79, 209, 197, 0.16);
}

.page-about .about-tl-item--current::before {
  background: var(--card-red);
  box-shadow: 0 0 0 3px rgba(226, 58, 46, 0.2);
}

.page-about .about-tl-ver {
  margin: 0 0 6px;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--screen-cyan);
}

.page-about .about-tl-item--current .about-tl-ver {
  color: var(--card-red);
}

.page-about .about-tl-item h3 {
  margin: 0 0 6px;
  font-size: 15.5px;
}

.page-about .about-tl-item p {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--about-muted);
}

/* 合作生态 */
.page-about .about-partners {
  display: grid;
  gap: 0;
}

.page-about .about-partner {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 2px 12px;
  padding: 16px 0;
  border-top: var(--about-line);
}

.page-about .about-partner .mono {
  grid-row: span 2;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--card-yellow);
  padding-top: 3px;
}

.page-about .about-partner h3 {
  margin: 0;
  font-size: 16px;
}

.page-about .about-partner p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.78;
  color: var(--about-muted);
  max-width: 44em;
}

/* 服务承诺 */
.page-about .about-section--service {
  background:
    radial-gradient(90% 120% at 10% 0%, rgba(30, 107, 78, 0.5), transparent 60%),
    var(--night-blue);
}

.page-about .about-service-grid {
  display: grid;
  gap: 12px;
  margin-top: 6px;
}

.page-about .about-service-card {
  border: var(--about-line);
  border-top: 3px solid var(--screen-cyan);
  background: rgba(10, 53, 42, 0.55);
  padding: 18px;
}

.page-about .about-service-card:nth-child(2) {
  border-top-color: var(--card-yellow);
}

.page-about .about-service-card:nth-child(3) {
  border-top-color: var(--card-red);
}

.page-about .about-service-card h3 {
  margin: 0 0 8px;
  font-size: 16px;
}

.page-about .about-service-card p {
  margin: 0 0 12px;
  font-size: 13.5px;
  line-height: 1.78;
  color: var(--about-muted);
}

.page-about .about-service-mono {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--light-white);
  border-top: var(--about-line);
  padding-top: 10px;
}

.page-about .about-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.page-about .about-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 11px 18px;
  border: 1px solid var(--screen-cyan);
  border-radius: var(--radius);
  color: var(--screen-cyan);
  font-size: 14px;
  letter-spacing: 0.04em;
  text-decoration: none;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  background: var(--screen-cyan);
  color: var(--night-blue);
}

.page-about .about-link--solid {
  background: var(--card-yellow);
  border-color: var(--card-yellow);
  color: var(--night-blue);
  font-weight: 500;
}

.page-about .about-link--solid:hover,
.page-about .about-link--solid:focus-visible {
  background: var(--light-white);
  border-color: var(--light-white);
  color: var(--night-blue);
}

/* 平板 */
@media (min-width: 720px) {
  .page-about {
    --about-pad: 32px;
  }

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

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

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

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

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

  .page-about .about-shift {
    border-bottom: 0;
    border-right: var(--about-line);
  }

  .page-about .about-shift:last-child {
    border-right: 0;
  }

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

  .page-about .about-list-item {
    grid-template-columns: 64px minmax(0, 0.9fr) minmax(0, 1.4fr);
    align-items: start;
    gap: 0 20px;
    padding: 22px 0;
  }

  .page-about .about-list-num {
    grid-row: span 2;
  }

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

  .page-about .about-tl-item {
    flex-basis: 46%;
  }
}

/* 桌面 */
@media (min-width: 960px) {
  .page-about {
    --about-pad: 48px;
  }

  .page-about .about-hero {
    padding-bottom: 56px;
  }

  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 44px;
    align-items: end;
    padding-top: 34px;
  }

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

  .page-about .about-section {
    padding-block: 72px;
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-split--rev {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .about-split--narrow {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
  }

  .page-about .about-col--narrow {
    position: sticky;
    top: 96px;
  }

  .page-about .about-split--rev .about-col--narrow {
    position: static;
  }

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

  .page-about .about-flow-step {
    padding: 20px 22px;
  }

  .page-about .about-bleed figcaption {
    bottom: 28px;
    padding: 14px 18px;
  }

  .page-about .about-partner {
    padding: 20px 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-flow-step,
  .page-about .about-link,
  .page-about .about-index a,
  .page-about .about-list-item {
    transition: none;
  }

  .page-about .about-flow-step:hover {
    transform: none;
  }

  .page-about .about-timeline {
    scroll-behavior: auto;
  }
}
<<<END>>>