.page-about {
  --about-line: rgba(11, 43, 69, 0.16);
  --about-line-soft: rgba(11, 43, 69, 0.08);
  --about-line-light: rgba(201, 214, 224, 0.24);
  --about-cream-soft: rgba(246, 241, 228, 0.82);
  background: var(--cream);
  color: var(--ink);
  overflow-x: clip;
}

.page-about .about-crumb {
  padding-top: clamp(0.9rem, 2.6vw, 1.5rem);
  padding-bottom: 0.4rem;
}

/* ---------- 首屏拼贴 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: var(--deep);
  color: var(--cream);
  padding: clamp(2rem, 6vw, 3.5rem) 0 clamp(2.25rem, 6vw, 4rem);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

.page-about .about-hero__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.34;
  z-index: -2;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(115% 85% at 12% 0%, rgba(11, 43, 69, 0.25), rgba(7, 28, 46, 0.94) 72%),
    repeating-linear-gradient(90deg, rgba(201, 214, 224, 0.08) 0 1px, transparent 1px 72px);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.75rem);
}

.page-about .about-hero__eyebrow {
  color: var(--silver);
}

.page-about .about-hero__title {
  margin: 0.6rem 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--fs-4xl);
  line-height: 1.1;
  letter-spacing: -0.03em;
  max-width: 14em;
}

.page-about .about-hero__lede {
  margin: 1.1rem 0 0;
  max-width: 34em;
  font-size: var(--fs-md);
  line-height: 1.85;
  color: var(--about-cream-soft);
}

.page-about .about-hero__index {
  border: 1px solid var(--about-line-light);
  border-radius: var(--radius-md);
  background: rgba(7, 28, 46, 0.55);
  padding: clamp(1rem, 3vw, 1.4rem);
}

.page-about .about-hero__index-label {
  margin: 0 0 0.5rem;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--aqua);
}

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

.page-about .about-hero__index-item + .about-hero__index-item {
  border-top: 1px dashed var(--about-line-light);
}

.page-about .about-hero__index-item a {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  padding: 0.6rem 0;
  color: var(--silver);
  text-decoration: none;
  font-size: var(--fs-sm);
  line-height: 1.55;
}

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

.page-about .about-hero__num {
  flex: none;
  font-size: var(--fs-sm);
  color: var(--sand);
  font-weight: 700;
}

.page-about .about-hero__index-item--current a {
  color: var(--cream);
  font-weight: 600;
}

.page-about .about-hero__badge {
  margin-left: auto;
  flex: none;
  text-decoration: none;
  font-size: var(--fs-xs);
}

.page-about .about-hero__coord {
  margin: 0.9rem 0 0;
  padding-top: 0.75rem;
  border-top: 1px solid var(--about-line-light);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.04em;
  color: rgba(201, 214, 224, 0.72);
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
    align-items: end;
  }
}

/* ---------- 使命与业务定位 ---------- */
.page-about .about-mission {
  padding: clamp(2.5rem, 7vw, 4.75rem) 0;
}

.page-about .about-mission__inner {
  display: grid;
  gap: clamp(1.75rem, 5vw, 3.5rem);
}

.page-about .about-mission__lead h2 {
  margin: 0.6rem 0 0;
  font-family: var(--font-display);
  font-size: var(--fs-3xl);
  line-height: 1.18;
  letter-spacing: -0.02em;
}

.page-about .about-prose {
  margin-top: 1.1rem;
  max-width: 40em;
}

.page-about .about-prose p {
  margin: 0 0 0.9rem;
  font-size: var(--fs-base);
  line-height: 1.85;
}

.page-about .about-cap {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--about-line);
}

.page-about .about-cap__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.9rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-cap__num {
  font-size: var(--fs-sm);
  color: var(--coral-deep);
  font-weight: 700;
  padding-top: 0.25rem;
}

.page-about .about-cap__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--fs-md);
  letter-spacing: -0.01em;
}

.page-about .about-cap__text {
  margin: 0.35rem 0 0;
  font-size: var(--fs-sm);
  line-height: 1.75;
  color: rgba(43, 33, 24, 0.78);
}

@media (min-width: 950px) {
  .page-about .about-mission__inner {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
    align-items: start;
  }
}

/* ---------- 版本演进 ---------- */
.page-about .about-versions {
  background: var(--abyss);
  color: var(--cream);
  padding: clamp(2.5rem, 7vw, 4.75rem) 0;
}

.page-about .about-eyebrow-light {
  color: var(--aqua);
}

.page-about .about-versions__head {
  display: grid;
  gap: 1rem;
}

.page-about .about-versions__title {
  margin: 0.6rem 0 0;
  font-family: var(--font-display);
  font-size: var(--fs-3xl);
  line-height: 1.18;
  letter-spacing: -0.025em;
  max-width: 18em;
}

.page-about .about-versions__lede {
  margin: 0;
  font-size: var(--fs-base);
  line-height: 1.85;
  color: rgba(201, 214, 224, 0.82);
  max-width: 34em;
}

.page-about .about-versions__figure {
  margin: clamp(1.5rem, 4vw, 2.25rem) 0 0;
}

.page-about .about-versions__toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.25rem;
  margin: clamp(1.25rem, 4vw, 2rem) 0 1.5rem;
  padding-bottom: 0.9rem;
  border-bottom: 1px solid var(--about-line-light);
}

.page-about .about-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.page-about .about-filter .filter-btn {
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  line-height: 1.4;
  padding: 0.4rem 1rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--about-line-light);
  background: transparent;
  color: var(--silver);
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.page-about .about-filter .filter-btn:hover,
.page-about .about-filter .filter-btn:focus-visible {
  border-color: var(--aqua);
  color: var(--cream);
}

.page-about .about-filter .filter-btn[aria-pressed="true"] {
  background: var(--coral);
  border-color: var(--coral);
  color: var(--deep);
  font-weight: 700;
}

.page-about .about-versions__status {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.05em;
  color: rgba(201, 214, 224, 0.66);
}

.page-about .about-versions__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .about-ver {
  display: grid;
  grid-template-columns: 1.1rem minmax(0, 1fr);
  gap: 0.9rem;
  padding-bottom: 1.9rem;
}

.page-about .about-ver__rail {
  position: relative;
  display: block;
}

.page-about .about-ver__rail::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0.9rem;
  bottom: 0;
  width: 1px;
  transform: translateX(-50%);
  background: linear-gradient(to bottom, var(--aqua), rgba(127, 179, 200, 0.12));
}

.page-about .about-ver:last-child .about-ver__rail::before {
  display: none;
}

.page-about .about-ver__rail::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 0.5rem;
  width: 0.65rem;
  height: 0.65rem;
  border-radius: 50%;
  border: 1px solid var(--aqua);
  background: var(--abyss);
  transform: translateX(-50%);
}

.page-about .about-ver__tag {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.1em;
  color: var(--sand);
}

.page-about .about-ver__num {
  font-size: var(--fs-lg);
  font-weight: 700;
  letter-spacing: 0;
  color: var(--sand);
}

.page-about .about-ver__title {
  margin: 0.35rem 0 0;
  font-family: var(--font-display);
  font-size: var(--fs-xl);
  line-height: 1.3;
  letter-spacing: -0.015em;
}

.page-about .about-ver__text {
  margin: 0.5rem 0 0;
  font-size: var(--fs-sm);
  line-height: 1.85;
  color: rgba(201, 214, 224, 0.84);
  max-width: 46em;
}

.page-about .about-versions__note {
  border-left: 2px solid var(--coral);
  padding: 0.15rem 0 0.15rem 1rem;
  background: rgba(232, 93, 63, 0.06);
}

.page-about .about-versions__note p {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.85;
  color: rgba(246, 241, 228, 0.88);
}

.page-about .about-link {
  color: var(--sand);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--coral);
}

@media (min-width: 900px) {
  .page-about .about-versions__head {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.9fr);
    align-items: end;
    gap: 2.5rem;
  }

  .page-about .about-ver {
    grid-template-columns: 1.6rem minmax(0, 1fr);
    gap: 1.5rem;
  }
}

/* ---------- 服务覆盖 ---------- */
.page-about .about-coverage {
  background: var(--mist);
  padding: clamp(2.5rem, 7vw, 4.75rem) 0;
}

.page-about .about-coverage__inner {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
}

.page-about .about-coverage__figure {
  margin: 0;
}

.page-about .about-coverage__body h2 {
  margin: 0.6rem 0 0;
  font-family: var(--font-display);
  font-size: var(--fs-2xl);
  line-height: 1.22;
  letter-spacing: -0.02em;
}

.page-about .about-coverage__text {
  margin: 0.9rem 0 0;
  font-size: var(--fs-base);
  line-height: 1.85;
  max-width: 34em;
}

.page-about .about-city {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 1.1rem 0 0;
  padding: 0;
}

.page-about .about-city li {
  padding: 0.28rem 0.7rem;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--about-line);
  font-size: var(--fs-sm);
  line-height: 1.6;
  color: var(--deep);
  transition: background 0.2s ease, border-color 0.2s ease;
}

.page-about .about-city li:hover {
  background: var(--deep);
  border-color: var(--deep);
  color: var(--cream);
}

.page-about .about-sla {
  margin-top: 1.5rem;
  border-top: 1px solid var(--about-line);
}

.page-about .about-sla__row {
  display: grid;
  gap: 0.2rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--about-line-soft);
}

.page-about .about-sla__key {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.12em;
  color: var(--coral-deep);
}

.page-about .about-sla__val {
  font-size: var(--fs-sm);
  line-height: 1.75;
}

@media (min-width: 900px) {
  .page-about .about-coverage__inner {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.15fr);
    align-items: start;
  }
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding: clamp(2.5rem, 7vw, 4.75rem) 0;
}

.page-about .about-team__inner {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
}

.page-about .about-team__num {
  margin: 0.35rem 0 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: var(--fs-5xl);
  line-height: 0.92;
  letter-spacing: -0.04em;
  color: var(--deep);
}

.page-about .about-team__title {
  margin: 0.6rem 0 0;
  font-family: var(--font-display);
  font-size: var(--fs-xl);
  line-height: 1.35;
  letter-spacing: -0.015em;
  max-width: 14em;
}

.page-about .about-team__text {
  margin: 0.8rem 0 0;
  font-size: var(--fs-sm);
  line-height: 1.85;
  color: rgba(43, 33, 24, 0.8);
  max-width: 26em;
}

.page-about .about-roles {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--about-line);
}

.page-about .about-role {
  display: grid;
  gap: 0.3rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-role__title {
  position: relative;
  margin: 0;
  padding-left: 1.1rem;
  font-family: var(--font-display);
  font-size: var(--fs-md);
  letter-spacing: -0.01em;
}

.page-about .about-role__title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--aqua);
}

.page-about .about-role__text {
  margin: 0;
  padding-left: 1.1rem;
  font-size: var(--fs-sm);
  line-height: 1.8;
  color: rgba(43, 33, 24, 0.78);
}

@media (min-width: 900px) {
  .page-about .about-team__inner {
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
    align-items: start;
  }

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

/* ---------- 合作与保障 ---------- */
.page-about .about-eco {
  background: var(--deep);
  color: var(--cream);
  padding: clamp(2.5rem, 7vw, 4.75rem) 0;
}

.page-about .about-eco__inner {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
}

.page-about .about-eco__head h2 {
  margin: 0.6rem 0 0;
  font-family: var(--font-display);
  font-size: var(--fs-2xl);
  line-height: 1.22;
  letter-spacing: -0.02em;
  max-width: 16em;
}

.page-about .about-eco__lede {
  margin: 0.9rem 0 0;
  font-size: var(--fs-sm);
  line-height: 1.85;
  color: rgba(201, 214, 224, 0.84);
  max-width: 32em;
}

.page-about .about-eco__pills {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 1.1rem 0 0;
  padding: 0;
}

.page-about .about-eco__panel {
  border: 1px solid var(--about-line-light);
  border-radius: var(--radius-md);
  padding: clamp(1rem, 3vw, 1.5rem);
  background: rgba(7, 28, 46, 0.5);
}

.page-about .about-eco__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(6.5rem, 1fr));
  gap: 1rem;
  padding-bottom: 1.1rem;
  border-bottom: 1px solid var(--about-line-light);
}

.page-about .about-eco__stat {
  display: grid;
  gap: 0.15rem;
}

.page-about .about-eco__figure {
  font-family: var(--font-mono);
  font-size: var(--fs-3xl);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--sand);
}

.page-about .about-eco__label {
  font-size: var(--fs-xs);
  letter-spacing: 0.06em;
  color: rgba(201, 214, 224, 0.8);
}

.page-about .about-eco__checks {
  list-style: none;
  margin: 1.1rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.7rem;
}

.page-about .about-eco__checks li {
  position: relative;
  padding-left: 1.5rem;
  font-size: var(--fs-sm);
  line-height: 1.8;
  color: rgba(246, 241, 228, 0.88);
}

.page-about .about-eco__checks li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 0.85rem;
  height: 0.85rem;
  border-radius: 3px;
  background: var(--teal);
  box-shadow: inset 0 0 0 2px rgba(7, 28, 46, 0.25);
}

.page-about .about-eco__btn {
  margin-top: 1.4rem;
  display: inline-block;
}

@media (min-width: 900px) {
  .page-about .about-eco__inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    align-items: start;
  }
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  background: var(--deep);
  color: var(--cream);
  padding: clamp(2rem, 6vw, 3.5rem) 0 clamp(2.5rem, 7vw, 4rem);
  border-top: 1px solid var(--about-line-light);
}

.page-about .about-cta__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--fs-2xl);
  line-height: 1.24;
  letter-spacing: -0.025em;
  max-width: 18em;
}

.page-about .about-cta__text {
  margin: 0.85rem 0 0;
  font-size: var(--fs-sm);
  line-height: 1.85;
  color: rgba(201, 214, 224, 0.84);
  max-width: 36em;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.4rem;
}

.page-about .about-cta__actions .btn {
  text-decoration: none;
}

@media (min-width: 900px) {
  .page-about .about-cta__inner {
    display: grid;
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.9fr);
    align-items: center;
    gap: 2.5rem;
  }

  .page-about .about-cta__actions {
    margin-top: 0;
    justify-content: flex-end;
  }
}
<<<END>>>