.page-about {
  --about-year-w: 48px;
  --about-dot-w: 26px;
  --about-gap: 12px;
  padding-bottom: clamp(56px, 9vw, 120px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 4vw, 44px) 0 clamp(34px, 5vw, 64px);
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  left: -12%;
  right: -18%;
  top: 4%;
  height: 74%;
  background: linear-gradient(112deg, rgba(18, 62, 92, .88) 0%, rgba(10, 35, 56, .55) 46%, rgba(4, 18, 31, 0) 74%);
  transform: skewY(-6deg);
  pointer-events: none;
}
.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -14%;
  top: -18%;
  width: min(52vw, 520px);
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 90, 31, .30) 0%, rgba(255, 90, 31, 0) 68%);
  pointer-events: none;
}
.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 56px);
  align-items: end;
}
.page-about .about-hero__copy .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
}
.page-about .about-hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 6.2vw, 68px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--paper);
  max-width: 15em;
}
.page-about .about-hero__lede {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: rgba(244, 235, 221, .82);
}
.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 0;
}
.page-about .stat {
  padding: 13px 14px 15px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: linear-gradient(160deg, rgba(10, 35, 56, .92), rgba(4, 18, 31, .74));
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.page-about .stat:hover {
  transform: translateY(-2px);
  border-color: var(--line-strong);
}
.page-about .stat dt {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--mist);
}
.page-about .stat dd {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(20px, 2.6vw, 27px);
  font-weight: 700;
  color: var(--paper);
  line-height: 1.2;
}
.page-about .stat .mono {
  color: var(--mint);
  font-size: 1em;
}
.page-about .stat--hot dd .mono {
  color: var(--orange);
}

/* ---------- 双栏骨架 ---------- */
.page-about .about-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  margin-top: clamp(32px, 5vw, 56px);
}
.page-about .about-index {
  border-top: 1px solid var(--line);
  padding-top: 14px;
}
.page-about .about-index__label {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--mist);
}
.page-about .about-index__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .about-index__list a {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: var(--pill);
  color: var(--paper);
  font-size: 13px;
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.page-about .about-index__list .mono {
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--mint);
}
.page-about .about-index__list a:hover,
.page-about .about-index__list a:focus-visible {
  border-color: var(--orange);
  background: rgba(255, 90, 31, .12);
}
.page-about .about-index__foot {
  display: none;
  margin: 18px 0 0;
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--line-strong);
}

/* ---------- 章节通用 ---------- */
.page-about .about-section {
  padding-top: clamp(28px, 4vw, 44px);
}
.page-about .about-section + .about-section {
  margin-top: clamp(30px, 5vw, 56px);
  border-top: 1px solid var(--line);
}
.page-about .about-section .eyebrow {
  margin: 0 0 10px;
}
.page-about .about-section .section-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(23px, 3.4vw, 38px);
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--paper);
  max-width: 22em;
}
.page-about .about-section__note {
  margin: 10px 0 0;
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--mist);
  white-space: nowrap;
}
.page-about .about-section .section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 10px 24px;
}

/* ---------- 时间线 ---------- */
.page-about .tl {
  position: relative;
  margin: clamp(22px, 3.4vw, 36px) 0 0;
  padding: 0;
  list-style: none;
}
.page-about .tl-curve {
  position: absolute;
  top: 8px;
  left: calc(var(--about-year-w) + var(--about-gap));
  width: var(--about-dot-w);
  height: calc(100% - 40px);
  pointer-events: none;
}
.page-about .tl-item {
  display: grid;
  grid-template-columns: var(--about-year-w) var(--about-dot-w) minmax(0, 1fr);
  gap: 0 var(--about-gap);
  align-items: start;
  padding-bottom: clamp(20px, 3vw, 32px);
}
.page-about .tl-year {
  grid-column: 1;
  text-align: right;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--mist);
  padding-top: 6px;
  transition: color var(--dur) var(--ease);
}
.page-about .tl-dot {
  grid-column: 2;
  justify-self: center;
  width: 13px;
  height: 13px;
  margin-top: 8px;
  border: 2px solid var(--orange);
  border-radius: 50%;
  background: var(--ink-900);
  transition: background-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.page-about .tl-dot--live {
  border-color: var(--mint);
  box-shadow: 0 0 0 4px rgba(51, 242, 192, .14);
}
.page-about .tl-item:hover .tl-dot,
.page-about .tl-item:focus-within .tl-dot {
  background: var(--orange);
  box-shadow: 0 0 0 6px rgba(255, 90, 31, .16);
}
.page-about .tl-item:hover .tl-dot--live,
.page-about .tl-item:focus-within .tl-dot--live {
  background: var(--mint);
  box-shadow: 0 0 0 6px rgba(51, 242, 192, .18);
}
.page-about .tl-item:hover .tl-year,
.page-about .tl-item:focus-within .tl-year {
  color: var(--mint);
}
.page-about .tl-body {
  grid-column: 3;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(165deg, rgba(10, 35, 56, .86), rgba(4, 18, 31, .66));
  padding: clamp(15px, 2.2vw, 22px);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.page-about .tl-item:hover .tl-body {
  transform: translateY(-2px);
  border-color: var(--line-strong);
}
.page-about .tl-body .pill-tag {
  margin-bottom: 10px;
}
.page-about .tl-title {
  margin: 0 0 8px;
  font-size: clamp(16px, 2vw, 19px);
  font-weight: 700;
  line-height: 1.45;
  color: var(--paper);
  transition: color var(--dur) var(--ease);
}
.page-about .tl-item:hover .tl-title {
  color: var(--orange);
}
.page-about .tl-body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(244, 235, 221, .76);
  max-width: 60ch;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 32px);
  margin-top: clamp(20px, 3vw, 30px);
}
.page-about .about-team__text > p {
  margin: 0 0 18px;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(244, 235, 221, .82);
}
.page-about .about-roles {
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}
.page-about .about-roles li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 9px 12px;
  border-left: 2px solid var(--ink-700);
  background: rgba(18, 62, 92, .18);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 14px;
  color: rgba(244, 235, 221, .88);
}
.page-about .about-roles .mono {
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--mint);
  min-width: 46px;
}
.page-about .about-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}
.page-about .metric {
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(10, 35, 56, .55);
}
.page-about .metric__num {
  display: block;
  font-size: clamp(19px, 2.4vw, 24px);
  font-weight: 700;
  color: var(--orange);
  line-height: 1.1;
}
.page-about .metric__label {
  display: block;
  margin-top: 6px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 图片通用 ---------- */
.page-about .about-figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  background: linear-gradient(150deg, var(--ink-700), var(--ink-900));
}
.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .about-figure figcaption {
  padding: 9px 14px 11px;
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--mist);
  border-top: 1px solid var(--line);
}

/* ---------- 本地化 ---------- */
.page-about .about-local {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 34px);
  margin-top: clamp(20px, 3vw, 30px);
}
.page-about .about-local__text > p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(244, 235, 221, .82);
}
.page-about .about-local__facts {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  margin: 0 0 20px;
}
.page-about .fact {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: linear-gradient(100deg, rgba(51, 242, 192, .10), rgba(4, 18, 31, 0) 78%);
}
.page-about .fact__num {
  font-size: clamp(20px, 2.6vw, 26px);
  font-weight: 700;
  color: var(--mint);
  line-height: 1;
}
.page-about .fact__label {
  font-size: 13px;
  color: rgba(244, 235, 221, .78);
}
.page-about .about-local .link-more {
  display: inline-block;
  color: var(--orange);
  font-size: 14px;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.page-about .about-local .link-more:hover,
.page-about .about-local .link-more:focus-visible {
  color: var(--yellow);
  border-bottom-color: var(--yellow);
}

/* ---------- 做事方式 ---------- */
.page-about .about-practice {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 32px);
  margin-top: clamp(20px, 3vw, 30px);
}
.page-about .practice-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}
.page-about .practice-list li {
  position: relative;
  padding: 16px 18px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(10, 35, 56, .48);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.page-about .practice-list li:hover {
  border-color: var(--line-strong);
  transform: translateY(-2px);
}
.page-about .practice__idx {
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--yellow);
}
.page-about .practice-list h3 {
  margin: 6px 0 8px;
  font-size: clamp(15px, 1.9vw, 17px);
  font-weight: 700;
  color: var(--paper);
}
.page-about .practice-list p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(244, 235, 221, .76);
}

/* ---------- 认证带（浅色反转） ---------- */
.page-about .about-recognition {
  margin-top: clamp(44px, 7vw, 88px);
  padding: clamp(34px, 6vw, 66px) 0 clamp(36px, 6vw, 60px);
  background: var(--paper);
  color: var(--ink-900);
  border-top: 6px solid var(--orange);
}
.page-about .about-recognition .section-title {
  color: var(--ink-900);
}
.page-about .about-recognition .eyebrow {
  color: var(--orange-deep);
}
.page-about .about-recognition .about-section__note {
  color: rgba(4, 18, 31, .5);
}
.page-about .cert-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}
.page-about .cert-card {
  padding: 18px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(4, 18, 31, .16);
  background: rgba(255, 255, 255, .42);
  cursor: default;
  outline-offset: 3px;
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.page-about .cert-card:hover,
.page-about .cert-card:focus-visible {
  background: #fff;
  border-color: var(--orange);
  transform: translateY(-2px);
  outline: none;
}
.page-about .cert-card__year {
  margin: 0;
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--orange-deep);
}
.page-about .cert-card h3 {
  margin: 8px 0 10px;
  font-size: clamp(15px, 1.9vw, 17px);
  font-weight: 800;
  line-height: 1.4;
  color: var(--ink-900);
}
.page-about .cert-card__desc {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: rgba(4, 18, 31, .72);
}
.page-about .cert-card__more {
  margin: 0;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(4, 18, 31, .62);
  transition: max-height 240ms var(--ease), opacity 200ms var(--ease), margin-top 200ms var(--ease);
}
.page-about .cert-card:hover .cert-card__more,
.page-about .cert-card:focus-within .cert-card__more,
.page-about .cert-card:focus .cert-card__more {
  max-height: 8em;
  opacity: 1;
  margin-top: 10px;
}
.page-about .about-partners {
  margin-top: clamp(24px, 4vw, 40px);
  padding-top: 18px;
  border-top: 1px solid rgba(4, 18, 31, .16);
}
.page-about .about-partners__label {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: .18em;
  color: rgba(4, 18, 31, .5);
}
.page-about .partner-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .partner-pills .pill-tag {
  background: var(--ink-900);
  color: var(--paper);
  border-color: transparent;
  font-size: 13px;
  padding: 7px 14px;
}
.page-about .partner-pills .pill-tag--new {
  background: var(--magenta);
}

/* ---------- 下一步 ---------- */
.page-about .about-next {
  margin-top: clamp(40px, 6vw, 76px);
}
.page-about .about-next .section-title {
  margin: 0 0 clamp(18px, 3vw, 26px);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 3vw, 32px);
  color: var(--paper);
}
.page-about .next-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}
.page-about .next-card {
  display: block;
  padding: 20px 20px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, rgba(10, 35, 56, .88), rgba(4, 18, 31, .62));
  text-decoration: none;
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.page-about .next-card:hover,
.page-about .next-card:focus-visible {
  transform: translateY(-2px);
  border-color: var(--orange);
  outline: none;
  box-shadow: 0 0 0 2px var(--mint);
}
.page-about .next-card__idx {
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--mint);
}
.page-about .next-card h3 {
  margin: 8px 0 8px;
  font-size: clamp(16px, 2vw, 18px);
  font-weight: 700;
  color: var(--paper);
}
.page-about .next-card p {
  margin: 0 0 14px;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(244, 235, 221, .72);
}
.page-about .next-card__go {
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--orange);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-metrics {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-local__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .cert-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .next-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about {
    --about-year-w: 72px;
    --about-dot-w: 32px;
    --about-gap: 20px;
  }
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(28px, 4vw, 64px);
  }
  .page-about .about-hero__stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin-bottom: -34px;
  }
  .page-about .about-shell {
    grid-template-columns: 208px minmax(0, 1fr);
    gap: clamp(28px, 4vw, 56px);
    align-items: start;
  }
  .page-about .about-index {
    position: sticky;
    top: 96px;
    padding-top: 18px;
  }
  .page-about .about-index__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 6px;
  }
  .page-about .about-index__list a {
    width: 100%;
    border-radius: var(--radius-sm);
    padding: 8px 12px;
  }
  .page-about .about-index__foot {
    display: block;
  }
  .page-about .about-team {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: start;
  }
  .page-about .about-local {
    grid-template-columns: minmax(0, 4fr) minmax(0, 6fr);
    align-items: start;
  }
  .page-about .about-figure--city img {
    aspect-ratio: 4 / 5;
  }
  .page-about .about-practice {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: start;
  }
  .page-about .about-figure--desk {
    position: sticky;
    top: 100px;
  }
  .page-about .tl-item {
    padding-bottom: clamp(26px, 3vw, 40px);
  }
}

@media (min-width: 1200px) {
  .page-about .about-hero__stats {
    margin-bottom: -60px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .stat,
  .page-about .tl-body,
  .page-about .tl-dot,
  .page-about .practice-list li,
  .page-about .cert-card,
  .page-about .next-card {
    transition: none;
  }
  .page-about .stat:hover,
  .page-about .tl-item:hover .tl-body,
  .page-about .practice-list li:hover,
  .page-about .cert-card:hover,
  .page-about .next-card:hover {
    transform: none;
  }
}
<<<END>>>