.page-about {
  --about-rail-w: 9rem;
  --about-hair: rgba(16, 34, 43, 0.14);
  --about-hair-light: rgba(232, 225, 210, 0.18);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(20px, 4vw, 36px) 0 clamp(44px, 7vw, 96px);
  color: var(--paper);
  background:
    radial-gradient(90% 70% at 88% 2%, rgba(53, 224, 208, 0.16), transparent 62%),
    radial-gradient(70% 60% at 8% 98%, rgba(216, 179, 106, 0.14), transparent 60%),
    linear-gradient(160deg, #123c50 0%, var(--deep) 48%, var(--night) 100%);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 46%;
  right: 0;
  bottom: 26%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(216, 179, 106, 0.5), transparent);
  pointer-events: none;
}

.page-about .about-hero .crumbs {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-about .about-hero .crumbs a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-about .about-hero .crumbs a:hover,
.page-about .about-hero .crumbs a:focus-visible {
  color: var(--glow);
  border-bottom-color: var(--glow);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  margin-top: clamp(26px, 5vw, 56px);
  position: relative;
  z-index: 1;
}

.page-about .about-hero__aside .eyebrow {
  color: var(--sand);
}

.page-about .about-hero__meta {
  margin: 12px 0 0;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-about .about-hero__aside-note {
  margin: 14px 0 0;
  max-width: 24em;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(232, 225, 210, 0.78);
}

.page-about .about-hero__main h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(40px, 8.5vw, 88px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-hero__main .lede {
  margin: clamp(18px, 3vw, 28px) 0 0;
  max-width: 34em;
  font-size: clamp(15px, 1.9vw, 17px);
  line-height: 1.8;
  color: rgba(244, 241, 233, 0.86);
}

.page-about .about-hero__index {
  list-style: none;
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 clamp(12px, 3vw, 32px);
}

.page-about .about-hero__index li {
  border-top: 1px solid var(--about-hair-light);
}

.page-about .about-hero__index a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 0;
  font-size: 14px;
  color: var(--paper);
  text-decoration: none;
  transition: color 0.18s var(--ease);
}

.page-about .about-hero__index a .mono {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--sand);
}

.page-about .about-hero__index a:hover,
.page-about .about-hero__index a:focus-visible {
  color: var(--glow);
}

/* ---------- 章节通用 ---------- */
.page-about .about-chapter {
  padding: clamp(40px, 6.5vw, 92px) 0;
}

.page-about .about-chapter__grid {
  display: grid;
  gap: clamp(16px, 3vw, 32px);
}

.page-about .about-chapter__rail {
  display: flex;
  align-items: baseline;
  gap: 14px;
}

.page-about .about-chapter__num {
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--sand);
}

.page-about .about-chapter__num::after {
  content: "";
  display: block;
  width: 28px;
  height: 2px;
  margin-top: 8px;
  background: var(--sand);
  transition: width 0.4s var(--ease);
}

.page-about .about-chapter[data-visible] .about-chapter__num::after {
  width: 56px;
}

.page-about .about-chapter__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 4.2vw, 34px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--deep);
}

.page-about .about-chapter__body > .about-prose:first-child {
  margin-top: 0;
}

.page-about .about-prose {
  max-width: 36em;
  margin: 0 0 1em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
}

.page-about .about-prose--lead {
  font-size: 17px;
  color: var(--deep);
}

.page-about .about-divider {
  margin: 0;
  border: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--sand), transparent);
  opacity: 0.7;
}

/* ---------- 品牌由来 ---------- */
.page-about .about-origin {
  display: grid;
  gap: clamp(22px, 3vw, 32px);
}

.page-about .about-quote {
  margin: clamp(18px, 3vw, 26px) 0;
  padding: 4px 0 4px clamp(14px, 2vw, 20px);
  border-left: 3px solid var(--sand);
  font-family: var(--font-display);
  font-size: clamp(18px, 2.6vw, 24px);
  font-weight: 800;
  line-height: 1.45;
  color: var(--deep);
}

.page-about .about-figure {
  margin: clamp(20px, 3vw, 28px) 0 0;
}

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

.page-about .about-figure--framed {
  padding: 10px;
  background: var(--paper);
  border: 1px solid var(--sand);
  box-shadow: 8px 8px 0 rgba(11, 43, 60, 0.08);
}

.page-about .about-figure__cap {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  line-height: 1.6;
  color: var(--ink-soft);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: clamp(20px, 3vw, 32px) 0 0;
  padding: 0;
}

.page-about .about-timeline__item {
  display: grid;
  gap: 6px clamp(16px, 3vw, 28px);
  padding: clamp(16px, 2.6vw, 24px) 0;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-timeline__item:first-child {
  border-top: 2px solid var(--sand);
}

.page-about .about-timeline__stamp {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.page-about .about-timeline__year {
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.08em;
  color: var(--deep);
}

.page-about .about-timeline__stage {
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--ink-soft);
}

.page-about .about-timeline__text h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(17px, 2.1vw, 20px);
  line-height: 1.35;
  color: var(--ink);
}

.page-about .about-timeline__text p {
  margin: 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* ---------- 服务版图 ---------- */
.page-about .about-reach {
  padding: clamp(40px, 6.5vw, 88px) 0;
  color: var(--paper);
  background: linear-gradient(180deg, var(--deep) 0%, var(--night) 100%);
}

.page-about .about-reach__eyebrow {
  color: var(--sand);
}

.page-about .about-reach__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 4.6vw, 40px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--paper);
  max-width: 20em;
}

.page-about .about-reach__lede {
  margin: clamp(14px, 2.4vw, 20px) 0 0;
  max-width: 38em;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(244, 241, 233, 0.82);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(20px, 3.4vw, 36px);
  margin-top: clamp(26px, 4vw, 44px);
}

.page-about .about-stat {
  padding-top: 16px;
  border-top: 1px solid var(--about-hair-light);
}

.page-about .about-stat__num {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(34px, 5.4vw, 48px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-stat__num::after {
  content: "";
  display: block;
  width: 18px;
  height: 2px;
  margin-top: 12px;
  background: var(--sand);
  transition: width 0.18s var(--ease);
}

.page-about .about-stat:hover .about-stat__num::after,
.page-about .about-stat:focus-within .about-stat__num::after {
  width: 56px;
}

.page-about .about-stat__unit {
  font-size: 0.42em;
  font-weight: 700;
  margin-left: 4px;
  color: var(--sand);
}

.page-about .about-stat__label {
  margin: 12px 0 0;
  font-size: 14px;
  color: var(--paper);
}

.page-about .about-stat__note {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(168, 199, 201, 0.95);
}

.page-about .about-reach__link {
  margin: clamp(24px, 4vw, 36px) 0 0;
  font-size: 14px;
}

.page-about .about-reach__link a {
  color: var(--glow);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 224, 208, 0.45);
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-about .about-reach__link a:hover,
.page-about .about-reach__link a:focus-visible {
  color: var(--paper);
  border-bottom-color: var(--paper);
}

/* ---------- 团队 ---------- */
.page-about .about-team-grid {
  display: grid;
  gap: clamp(22px, 3vw, 32px);
}

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

.page-about .about-team__cards {
  display: grid;
  gap: clamp(14px, 2vw, 20px);
}

.page-about .about-card {
  padding: clamp(16px, 2.4vw, 22px);
  background: var(--paper);
  border: 1px solid rgba(16, 34, 43, 0.12);
  border-top: 3px solid var(--sand);
  transition: transform 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-about .about-card--coral {
  border-top-color: var(--coral);
}

.page-about .about-card--jade {
  border-top-color: var(--jade);
}

.page-about .about-card:hover {
  transform: translateY(-2px);
  border-color: var(--jade);
}

.page-about .about-card__role {
  margin: 0;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  color: var(--deep);
}

.page-about .about-card__count {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
}

.page-about .about-card__brief {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-about .about-card__more {
  margin-top: 12px;
}

.page-about .about-card__more summary {
  cursor: pointer;
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--deep);
  border-bottom: 1px solid var(--sand);
  padding-bottom: 2px;
}

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

.page-about .about-card__more summary::before {
  content: "+";
  font-size: 14px;
  color: var(--coral);
}

.page-about .about-card__more[open] summary::before {
  content: "−";
}

.page-about .about-card__more p {
  margin: 12px 0 0;
  padding: 12px;
  background: var(--shell);
  font-size: 13px;
  line-height: 1.8;
  color: var(--ink);
}

.page-about .about-team-note {
  margin-top: clamp(22px, 3vw, 32px);
  padding-top: 16px;
  border-top: 1px solid var(--about-hair);
  font-size: 15px;
  color: var(--ink-soft);
}

/* ---------- 服务水准 ---------- */
.page-about .about-standards {
  padding: clamp(40px, 6.5vw, 88px) 0;
  background: var(--shell);
}

.page-about .about-metrics {
  display: grid;
  gap: clamp(18px, 2.6vw, 28px);
  margin: clamp(20px, 3vw, 30px) 0 clamp(22px, 3vw, 30px);
}

.page-about .about-metric {
  padding: 14px 0 0;
  border-top: 1px solid rgba(16, 34, 43, 0.2);
}

.page-about .about-metric__num {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 5vw, 48px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--deep);
}

.page-about .about-metric__unit {
  font-size: 0.4em;
  font-weight: 700;
  margin-left: 4px;
  color: var(--ink-soft);
}

.page-about .about-metric__label {
  margin: 10px 0 0;
  font-size: 14px;
  color: var(--ink);
}

.page-about .about-metric__note {
  margin: 6px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-about .about-inline-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  margin: 6px 0 0;
  font-size: 14px;
}

.page-about .about-inline-links a {
  color: var(--deep);
  text-decoration: none;
  border-bottom: 2px solid var(--sand);
  padding-bottom: 2px;
  transition: border-color 0.18s var(--ease), color 0.18s var(--ease);
}

.page-about .about-inline-links a:hover,
.page-about .about-inline-links a:focus-visible {
  color: var(--ink);
  border-bottom-color: var(--jade);
}

/* ---------- 备案与到访 ---------- */
.page-about .about-chapter--narrow .about-chapter__body {
  max-width: 44em;
}

.page-about .about-facts {
  margin: clamp(18px, 3vw, 26px) 0 0;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-facts__row {
  display: grid;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-facts__row dt {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--ink-soft);
}

.page-about .about-facts__row dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
}

/* ---------- 收尾 ---------- */
.page-about .about-next {
  padding: clamp(40px, 6.5vw, 88px) 0;
  color: var(--paper);
  background:
    radial-gradient(80% 70% at 90% 0%, rgba(255, 107, 74, 0.16), transparent 60%),
    linear-gradient(180deg, var(--night) 0%, #061821 100%);
}

.page-about .about-next__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 4.6vw, 42px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-next__lede {
  margin: clamp(14px, 2.4vw, 20px) 0 0;
  max-width: 36em;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(244, 241, 233, 0.82);
}

.page-about .about-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-next__note {
  margin: clamp(18px, 3vw, 26px) 0 0;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

/* ---------- 断点 ---------- */
@media (min-width: 560px) {
  .page-about .about-hero__index {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-about .about-timeline__item {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
  }

  .page-about .about-metrics {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(20px, 3vw, 36px);
  }

  .page-about .about-facts__row {
    grid-template-columns: 8rem minmax(0, 1fr);
    gap: 16px;
    align-items: baseline;
  }
}

@media (min-width: 880px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 3fr) minmax(0, 9fr);
    gap: clamp(32px, 4vw, 72px);
    align-items: start;
  }

  .page-about .about-chapter__grid {
    grid-template-columns: minmax(0, 3fr) minmax(0, 9fr);
    gap: clamp(28px, 4.5vw, 72px);
    align-items: start;
  }

  .page-about .about-chapter__rail {
    display: block;
    position: sticky;
    top: clamp(16px, 3vw, 32px);
  }

  .page-about .about-chapter__title {
    margin-top: 14px;
  }
}

@media (min-width: 900px) {
  .page-about .about-origin {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }

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

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

@media (min-width: 960px) {
  .page-about .about-team-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }

  .page-about .about-team__cards > *:nth-child(2) {
    margin-left: 24px;
  }

  .page-about .about-team__cards > *:nth-child(3) {
    margin-left: 48px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-card,
  .page-about .about-chapter__num::after,
  .page-about .about-stat__num::after {
    transition: none;
  }

  .page-about .about-card:hover {
    transform: none;
  }
}
<<<END>>>