.page-about {
  --about-pad: clamp(48px, 8vw, 104px);
  --about-gap: clamp(20px, 4vw, 44px);
  --about-line: rgba(56, 242, 224, 0.16);
  --about-narrow: 62ch;
  padding-bottom: clamp(40px, 7vw, 88px);
  color: var(--c-ice);
}

.page-about .about-top {
  padding-top: clamp(20px, 3vw, 34px);
}

.page-about .about-h2 {
  margin: 10px 0 0;
  font-size: clamp(1.55rem, 3.6vw, 2.6rem);
  font-weight: 300;
  letter-spacing: -0.01em;
  line-height: 1.25;
  color: var(--c-ice);
}

.page-about .about-intro,
.page-about .about-team__lede,
.page-about .about-partners__lede {
  margin: 14px 0 0;
  max-width: var(--about-narrow);
  color: var(--c-steel);
  line-height: 1.75;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: clamp(26px, 4vw, 52px);
  padding-bottom: clamp(36px, 6vw, 72px);
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-size: clamp(2.15rem, 7.4vw, 4.9rem);
  font-weight: 200;
  letter-spacing: -0.035em;
  line-height: 1.06;
  background: linear-gradient(96deg, var(--c-ice) 42%, var(--c-cyan-soft) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-about .about-hero__lede {
  margin: clamp(18px, 3vw, 28px) 0 0;
  max-width: 60ch;
  font-size: clamp(1rem, 1.5vw, 1.12rem);
  line-height: 1.8;
  color: var(--c-steel);
}

.page-about .about-board {
  margin-top: clamp(28px, 5vw, 52px);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 16px 18px;
  background: var(--c-glass);
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
  transition: border-color 200ms ease, background-color 200ms ease;
}

.page-about .about-stat:hover,
.page-about .about-stat:focus-within {
  border-color: rgba(56, 242, 224, 0.55);
}

.page-about .about-stat--lead {
  grid-column: span 2;
  background: linear-gradient(150deg, rgba(56, 242, 224, 0.14), rgba(10, 32, 56, 0.55));
}

.page-about .about-stat__num {
  font-size: clamp(1.7rem, 5vw, 2.6rem);
  color: var(--c-cyan);
  letter-spacing: -0.02em;
}

.page-about .about-stat--lead .about-stat__num {
  font-size: clamp(2.4rem, 9vw, 4rem);
  color: var(--c-signal);
}

.page-about .about-stat__unit {
  font-size: 0.5em;
  margin-left: 2px;
  color: var(--c-cyan-soft);
}

.page-about .about-stat--lead .about-stat__unit {
  color: var(--c-ember);
}

.page-about .about-stat__label {
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  color: var(--c-ice);
}

.page-about .about-stat__note {
  margin-top: 4px;
  font-size: 0.8rem;
  line-height: 1.65;
  color: var(--c-steel);
}

/* ---------- 通用 section ---------- */
.page-about .about-section {
  padding: var(--about-pad) 0;
  border-top: 1px solid var(--about-line);
}

.page-about .about-section:first-of-type {
  border-top: 0;
}

/* ---------- 起点 ---------- */
.page-about .about-origin__grid {
  display: grid;
  gap: clamp(24px, 5vw, 56px);
}

.page-about .about-origin__text p {
  max-width: var(--about-narrow);
  margin: 14px 0 0;
  line-height: 1.8;
  color: var(--c-steel);
}

.page-about .about-origin__text p:first-of-type {
  color: var(--c-ice);
}

.page-about .about-origin__links {
  margin-top: clamp(22px, 3vw, 32px);
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-figure {
  margin: 0;
  position: relative;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--about-line);
}

.page-about .about-figure--origin img {
  aspect-ratio: 10 / 7;
}

.page-about .about-figure--team img {
  aspect-ratio: 11 / 7;
}

.page-about .about-figure--partners img {
  aspect-ratio: 2 / 1;
}

.page-about .about-figure__caption {
  margin-top: 10px;
  font-size: 0.76rem;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--c-steel);
}

/* ---------- 时间线 ---------- */
.page-about .about-years {
  margin: clamp(20px, 3.5vw, 30px) 0 clamp(8px, 2vw, 16px);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-years a {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  padding: 7px 13px;
  border: 1px solid var(--about-line);
  border-radius: 999px;
  color: var(--c-cyan);
  text-decoration: none;
  transition: background-color 180ms ease, border-color 180ms ease, color 180ms ease;
}

.page-about .about-years a:hover,
.page-about .about-years a:focus-visible {
  background: rgba(56, 242, 224, 0.14);
  border-color: var(--c-cyan);
  color: var(--c-ice);
}

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

.page-about .about-mile {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  padding: 24px 0 24px 26px;
  border-top: 1px solid var(--about-line);
  scroll-margin-top: 80px;
}

.page-about .about-mile::before {
  content: "";
  position: absolute;
  left: 0;
  top: 30px;
  width: 9px;
  height: 9px;
  background: var(--c-cyan);
  transform: rotate(45deg);
  box-shadow: 0 0 0 4px rgba(56, 242, 224, 0.12);
}

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

.page-about .about-mile__num {
  font-family: var(--font-mono);
  font-size: clamp(1.9rem, 7vw, 3rem);
  font-weight: 300;
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--c-cyan-soft);
  display: inline-block;
  transform: skewX(-6deg);
}

.page-about .about-mile__unit {
  font-size: 0.55em;
  margin-left: 2px;
}

.page-about .about-mile__tag {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  color: var(--c-steel);
  border-left: 1px solid var(--about-line);
  padding-left: 10px;
}

.page-about .about-mile__body h3 {
  margin: 0;
  font-size: clamp(1.05rem, 2.2vw, 1.28rem);
  font-weight: 500;
  color: var(--c-ice);
}

.page-about .about-mile__body p {
  margin: 8px 0 0;
  max-width: var(--about-narrow);
  line-height: 1.8;
  color: var(--c-steel);
  font-size: 0.95rem;
}

/* ---------- 团队 ---------- */
.page-about .about-team__head {
  display: grid;
  gap: 12px;
}

.page-about .about-lines {
  margin-top: clamp(26px, 4vw, 44px);
  display: grid;
  gap: 14px;
}

.page-about .about-line {
  position: relative;
  padding: 22px 20px 24px;
  background: var(--c-midnight);
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
  transition: border-color 220ms ease, transform 220ms ease, background-color 220ms ease;
}

.page-about .about-line:hover,
.page-about .about-line:focus-within {
  border-color: rgba(56, 242, 224, 0.55);
  background: #0d2740;
}

.page-about .about-line__idx {
  display: block;
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--c-signal);
}

.page-about .about-line h3 {
  margin: 10px 0 0;
  font-size: 1.2rem;
  font-weight: 500;
  color: var(--c-ice);
}

.page-about .about-line p {
  margin: 10px 0 0;
  font-size: 0.93rem;
  line-height: 1.8;
  color: var(--c-steel);
}

.page-about .about-line__hover {
  padding-top: 12px;
  border-top: 1px dashed var(--about-line);
  font-size: 0.85rem !important;
  color: var(--c-cyan-soft) !important;
}

.page-about .about-team__bottom {
  margin-top: clamp(26px, 4vw, 44px);
  display: grid;
  gap: clamp(20px, 4vw, 36px);
}

.page-about .about-check {
  align-self: start;
  padding: 22px 22px 24px;
}

.page-about .about-check__text {
  margin: 12px 0 0;
  font-size: 0.93rem;
  line-height: 1.8;
  color: var(--c-ice);
}

.page-about .about-check__link {
  display: inline-block;
  margin-top: 16px;
  font-size: 0.85rem;
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--about-line);
  padding-bottom: 3px;
}

.page-about .about-check__link:hover,
.page-about .about-check__link:focus-visible {
  border-bottom-color: var(--c-cyan);
}

/* ---------- 覆盖范围 ---------- */
.page-about .about-reach__grid {
  margin-top: clamp(24px, 4vw, 40px);
  display: grid;
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-reach__item {
  padding: 24px 20px 26px;
  background: var(--c-void);
}

.page-about .about-reach__num {
  display: block;
  font-size: clamp(2rem, 6vw, 3.2rem);
  color: var(--c-signal);
  letter-spacing: -0.03em;
  line-height: 1;
}

.page-about .about-reach__unit {
  font-size: 0.5em;
  color: var(--c-ember);
  margin-left: 2px;
}

.page-about .about-reach__item h3 {
  margin: 10px 0 0;
  font-size: 1rem;
  font-weight: 500;
  color: var(--c-ice);
}

.page-about .about-reach__item p {
  margin: 10px 0 0;
  font-size: 0.9rem;
  line-height: 1.78;
  color: var(--c-steel);
}

/* ---------- 合作 ---------- */
.page-about .about-partners__head {
  display: grid;
  gap: clamp(20px, 4vw, 36px);
}

.page-about .about-tags {
  list-style: none;
  margin: clamp(22px, 3.5vw, 32px) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-partners__grid {
  margin-top: clamp(22px, 3.5vw, 34px);
  display: grid;
  gap: 14px;
}

.page-about .about-partner {
  padding: 20px 20px 22px;
  border-left: 2px solid var(--c-cyan);
  background: linear-gradient(100deg, rgba(56, 242, 224, 0.09), rgba(6, 17, 31, 0) 72%);
}

.page-about .about-partner h3 {
  margin: 0;
  font-size: 1rem;
  font-weight: 500;
  color: var(--c-ice);
}

.page-about .about-partner p {
  margin: 9px 0 0;
  font-size: 0.9rem;
  line-height: 1.78;
  color: var(--c-steel);
}

.page-about .about-partners__cta {
  display: inline-block;
  margin-top: clamp(22px, 3.5vw, 32px);
  font-family: var(--font-mono);
  font-size: 0.84rem;
  letter-spacing: 0.04em;
  color: var(--c-signal);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 90, 42, 0.45);
  padding-bottom: 4px;
}

.page-about .about-partners__cta:hover,
.page-about .about-partners__cta:focus-visible {
  color: var(--c-ember);
  border-bottom-color: var(--c-ember);
}

/* ---------- 服务方式 ---------- */
.page-about .about-promise__grid {
  margin-top: clamp(24px, 4vw, 40px);
  display: grid;
  gap: clamp(20px, 4vw, 40px);
}

.page-about .about-promise__list {
  display: grid;
  gap: 0;
}

.page-about .about-promise__item {
  padding: 18px 0;
  border-top: 1px solid var(--about-line);
}

.page-about .about-promise__item:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-promise__item h3 {
  margin: 0;
  font-size: 1rem;
  font-weight: 500;
  color: var(--c-cyan-soft);
}

.page-about .about-promise__item p {
  margin: 8px 0 0;
  max-width: 56ch;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--c-steel);
}

.page-about .about-quote {
  align-self: start;
  padding: 26px 22px 24px;
  position: relative;
  overflow: hidden;
}

.page-about .about-quote__mark {
  display: block;
  font-size: 2.6rem;
  line-height: 0.7;
  color: var(--c-signal);
  opacity: 0.85;
}

.page-about .about-quote__text {
  margin: 12px 0 0;
  font-size: clamp(1rem, 2vw, 1.12rem);
  line-height: 1.75;
  font-weight: 300;
  color: var(--c-ice);
}

.page-about .about-quote__by {
  margin: 16px 0 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--c-steel);
}

.page-about .about-actions {
  margin-top: clamp(28px, 4.5vw, 44px);
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

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

/* ---------- 平板 ---------- */
@media (min-width: 640px) {
  .page-about .about-board {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-stat--lead {
    grid-column: span 3;
  }

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

  .page-about .about-reach__grid {
    gap: 1px;
  }

  .page-about .about-actions .btn {
    min-width: 160px;
    text-align: center;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-about .about-hero {
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    column-gap: clamp(28px, 5vw, 64px);
    align-items: start;
  }

  .page-about .about-hero > .u-eyebrow,
  .page-about .about-hero > .about-hero__title {
    grid-column: 1 / -1;
  }

  .page-about .about-hero__title {
    max-width: 20ch;
  }

  .page-about .about-hero__lede {
    grid-column: 1;
    margin-bottom: 0;
  }

  .page-about .about-board {
    grid-column: 2;
    grid-row: 3 / span 2;
    margin-top: clamp(18px, 2vw, 24px);
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
  }

  .page-about .about-stat--lead {
    grid-column: span 2;
  }

  .page-about .about-stat {
    padding: 14px 14px 16px;
  }

  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.82fr);
    align-items: start;
  }

  .page-about .about-figure--origin {
    margin-top: 34px;
  }

  .page-about .about-mile {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: clamp(20px, 4vw, 56px);
    padding: 30px 0 30px 30px;
    align-items: start;
  }

  .page-about .about-mile::before {
    top: 42px;
  }

  .page-about .about-mile__num {
    font-size: clamp(2.6rem, 4.4vw, 3.9rem);
  }

  .page-about .about-mile__year {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .page-about .about-mile__tag {
    border-left: 0;
    padding-left: 0;
  }

  .page-about .about-team__head {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.9fr);
    align-items: end;
    column-gap: clamp(24px, 4vw, 52px);
  }

  .page-about .about-team__lede {
    margin-top: 0;
  }

  .page-about .about-lines {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
    gap: 16px;
  }

  .page-about .about-line:nth-child(2) {
    margin-top: 38px;
  }

  .page-about .about-line:nth-child(3) {
    margin-top: 76px;
  }

  .page-about .about-team__bottom {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
    align-items: start;
  }

  .page-about .about-check {
    margin-top: 34px;
  }

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

  .page-about .about-partners__head {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: center;
    column-gap: clamp(24px, 4vw, 56px);
  }

  .page-about .about-partners__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .about-promise__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.65fr);
    align-items: start;
  }

  .page-about .about-quote {
    margin-top: 20px;
  }
}

@media (min-width: 1200px) {
  .page-about .about-hero__lede {
    max-width: 54ch;
  }

  .page-about .about-mile {
    grid-template-columns: 260px minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-stat,
  .page-about .about-line,
  .page-about .about-years a {
    transition: none;
  }
}
<<<PAGE_CSS_END>>>
</main>