.page-about {
  background: var(--sky-deep);
  color: var(--paper);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

.page-about .about-hero {
  position: relative;
  padding: clamp(24px, 5vw, 48px) 0 clamp(44px, 7vw, 84px);
  background:
    radial-gradient(120% 90% at 84% -12%, rgba(245, 197, 66, .16), transparent 62%),
    linear-gradient(180deg, var(--sky-deep) 0%, #08172b 78%, var(--sky-deep) 100%);
  overflow: hidden;
}

.page-about .about-hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-about .about-hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .3;
  filter: saturate(.85);
}

.page-about .about-hero__lines {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: repeating-linear-gradient(
    102deg,
    rgba(143, 163, 191, .13) 0 1px,
    transparent 1px 96px
  );
  -webkit-mask-image: linear-gradient(180deg, transparent 0%, #000 34%, #000 72%, transparent 100%);
  mask-image: linear-gradient(180deg, transparent 0%, #000 34%, #000 72%, transparent 100%);
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 2;
}

.page-about .about-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 22px 0 0;
  font-size: 12px;
  letter-spacing: .26em;
  color: var(--gold);
}

.page-about .about-kicker::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--gold);
}

.page-about .about-hero__title {
  margin: 16px 0 0;
  font-size: clamp(38px, 7.4vw, 92px);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-about .about-hero__lede {
  margin: 22px 0 0;
  max-width: 640px;
  font-size: clamp(15px, 1.7vw, 18px);
  line-height: 1.78;
  color: #cdd9e8;
}

.page-about .about-vertical {
  display: none;
}

.page-about .about-hero__facts {
  list-style: none;
  margin: clamp(30px, 4.5vw, 48px) 0 0;
  padding: 22px 0 0;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 20px 24px;
}

.page-about .about-fact__value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--gold);
  line-height: 1.2;
}

.page-about .about-fact__label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  padding: clamp(24px, 4vw, 40px) 0 clamp(48px, 7vw, 88px);
}

.page-about .about-index__title {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--mist);
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-index__link {
  display: inline-flex;
  align-items: center;
  box-sizing: border-box;
  min-height: 44px;
  padding: 10px 14px;
  font-size: 13px;
  color: var(--mist);
  text-decoration: none;
  border: 1px solid var(--line);
  white-space: nowrap;
  transition: color .2s var(--ease), border-color .2s var(--ease), background-color .2s var(--ease);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--gold);
  border-color: var(--gold);
}

.page-about .about-index__link[aria-current="true"] {
  color: var(--gold);
  border-color: var(--gold);
  background: rgba(245, 197, 66, .08);
}

.page-about .about-section {
  padding: clamp(32px, 5vw, 56px) 0;
  border-top: 1px solid rgba(40, 69, 107, .6);
}

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

.page-about .about-section--last {
  border-top: 1px solid rgba(40, 69, 107, .6);
}

.page-about .about-h2 {
  margin: 0 0 18px;
  font-size: clamp(26px, 4.6vw, 48px);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-about .about-p {
  margin: 0 0 18px;
  max-width: 720px;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: #d3dded;
}

.page-about .about-p:last-child {
  margin-bottom: 0;
}

.page-about .about-link {
  color: var(--gold-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(245, 197, 66, .45);
  padding-bottom: 1px;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

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

.page-about .about-link--dark {
  color: var(--sky-deep);
  border-bottom-color: rgba(11, 31, 58, .5);
}

.page-about .about-link--dark:hover,
.page-about .about-link--dark:focus-visible {
  color: #0a2a52;
  border-bottom-color: #0a2a52;
}

/* 四步流程 */
.page-about .about-steps {
  list-style: none;
  margin: 30px 0 0;
  padding: 1px;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-step {
  background: var(--sky-night);
  padding: 20px 18px;
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
}

.page-about .about-step__num {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--gold);
  letter-spacing: .06em;
  padding-top: 3px;
}

.page-about .about-step__title {
  margin: 0 0 8px;
  font-size: clamp(17px, 2vw, 21px);
  font-weight: 600;
  line-height: 1.35;
  color: var(--paper);
}

.page-about .about-step__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

/* 图片 */
.page-about .about-figure {
  margin: 28px 0 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line);
  background: linear-gradient(160deg, #0d2340, #173458);
  object-fit: cover;
}

.page-about .about-figure figcaption {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: .04em;
  color: var(--mist);
}

/* 星轨时间轴 */
.page-about .about-track-wrap {
  display: grid;
  gap: 28px;
  margin-top: 28px;
}

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

.page-about .about-track__item {
  position: relative;
  padding: 0 0 26px 34px;
}

.page-about .about-track__item::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 14px;
  bottom: -2px;
  width: 1px;
  background: linear-gradient(180deg, var(--line), rgba(40, 69, 107, .15));
}

.page-about .about-track__item:last-child {
  padding-bottom: 0;
}

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

.page-about .about-track__dot {
  position: absolute;
  left: 0;
  top: 6px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--sky-deep);
  border: 1px solid currentColor;
  box-shadow: 0 0 0 4px rgba(11, 31, 58, .9);
  transition: box-shadow .25s var(--ease);
}

.page-about .about-track__dot--green {
  color: var(--flag-green);
  background: var(--flag-green);
}

.page-about .about-track__dot--blue {
  color: var(--banner-blue);
  background: var(--banner-blue);
}

.page-about .about-track__dot--gold {
  color: var(--gold);
  background: var(--gold);
}

.page-about .about-track__dot--yellow {
  color: var(--flag-yellow);
  background: var(--flag-yellow);
}

.page-about .about-track__dot--red {
  color: var(--flag-red);
  background: var(--flag-red);
}

.page-about .about-track__item:hover .about-track__dot,
.page-about .about-track__item:focus-within .about-track__dot {
  box-shadow: 0 0 0 4px rgba(11, 31, 58, .9), 0 0 16px 2px currentColor;
}

.page-about .about-track__stage {
  margin: 0 0 6px;
  font-size: clamp(16px, 1.9vw, 19px);
  font-weight: 600;
  line-height: 1.4;
  color: var(--paper);
  transition: color .25s var(--ease);
}

.page-about .about-track__item:hover .about-track__stage {
  color: var(--gold);
}

.page-about .about-track__text {
  margin: 0;
  max-width: 620px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
  transition: color .25s var(--ease);
}

.page-about .about-track__item:hover .about-track__text {
  color: #c3d1e4;
}

/* 团队规模 */
.page-about .about-stats {
  list-style: none;
  margin: 28px 0 0;
  padding: 1px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-stat {
  background: var(--sky-night);
  padding: 22px 18px;
}

.page-about .about-stat__value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(30px, 4vw, 42px);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--gold);
  line-height: 1.1;
}

.page-about .about-stat__label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

.page-about .about-table-wrap {
  margin-top: 30px;
}

.page-about .about-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.page-about .about-table__caption {
  caption-side: top;
  text-align: left;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--mist);
  padding-bottom: 12px;
}

.page-about .about-table thead {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.page-about .about-table tr {
  display: block;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-table td {
  display: block;
  padding: 3px 0;
  line-height: 1.7;
  color: var(--mist);
  border: 0;
}

.page-about .about-table td:first-child {
  font-size: 15px;
  font-weight: 600;
  color: var(--gold);
  padding-bottom: 6px;
}

/* 浅底横带 */
.page-about .about-band {
  background: var(--wash);
  color: var(--sky-deep);
  padding: clamp(40px, 6.5vw, 76px) 0;
  border-top: 1px solid rgba(11, 31, 58, .12);
  border-bottom: 1px solid rgba(11, 31, 58, .12);
}

.page-about .about-h2--band {
  color: var(--sky-deep);
}

.page-about .about-p--band {
  color: #1e3552;
  max-width: 660px;
}

.page-about .about-contact-grid {
  margin-top: 26px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: rgba(11, 31, 58, .16);
  border: 1px solid rgba(11, 31, 58, .16);
}

.page-about .about-contact-cell {
  background: var(--wash);
  padding: 18px 16px;
}

.page-about .about-contact-label {
  display: block;
  margin-bottom: 8px;
  font-size: 12px;
  letter-spacing: .18em;
  color: #4a617f;
}

.page-about .about-contact-value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(14px, 1.7vw, 17px);
  font-weight: 600;
  line-height: 1.55;
  color: var(--sky-deep);
  overflow-wrap: break-word;
  word-break: break-word;
}

.page-about .about-contact-hint {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.65;
  color: #4a617f;
}

.page-about .about-band__foot {
  margin: 24px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: #1e3552;
}

/* 为什么留下 */
.page-about .about-why {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-why__item {
  background: var(--sky-deep);
  padding: 22px 0;
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 4px 14px;
}

.page-about .about-why__num {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--flag-yellow);
  letter-spacing: .06em;
  padding-top: 5px;
  grid-row: span 2;
}

.page-about .about-why__title {
  margin: 0;
  font-size: clamp(17px, 2.1vw, 22px);
  font-weight: 600;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .about-why__text {
  margin: 8px 0 0;
  max-width: 640px;
  font-size: 14px;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .about-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

@media (min-width: 760px) {
  .page-about .about-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

  .page-about .about-why__item {
    padding: 26px 20px;
  }
}

@media (min-width: 860px) {
  .page-about .about-track-wrap {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: clamp(28px, 4vw, 52px);
    align-items: start;
  }

  .page-about .about-figure--track {
    margin-top: 6px;
  }

  .page-about .about-table thead {
    position: static;
    width: auto;
    height: auto;
    overflow: visible;
    clip: auto;
    white-space: normal;
  }

  .page-about .about-table tr {
    display: table-row;
    padding: 0;
  }

  .page-about .about-table th {
    padding: 0 16px 12px 0;
    font-size: 12px;
    letter-spacing: .16em;
    font-weight: 600;
    color: var(--gold);
    text-align: left;
    border-bottom: 1px solid var(--line);
  }

  .page-about .about-table td {
    display: table-cell;
    padding: 16px 16px 16px 0;
    vertical-align: top;
    border-bottom: 1px solid var(--line);
  }

  .page-about .about-table td:first-child {
    font-size: 15px;
    padding-bottom: 16px;
    white-space: nowrap;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 48px;
    align-items: end;
    margin-top: 6px;
  }

  .page-about .about-vertical {
    display: block;
    writing-mode: vertical-rl;
    padding-bottom: 4px;
    font-size: 12px;
    letter-spacing: .3em;
    color: var(--mist);
  }

  .page-about .about-figure--workflow {
    max-width: 720px;
  }
}

@media (min-width: 980px) {
  .page-about .about-layout {
    grid-template-columns: 210px minmax(0, 1fr);
    gap: clamp(36px, 5vw, 72px);
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: 104px;
    align-self: start;
  }

  .page-about .about-index__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-index__link {
    display: block;
    min-height: 0;
    padding: 9px 0 9px 16px;
    font-size: 14px;
    border: 0;
    border-left: 1px solid var(--line);
    white-space: normal;
  }

  .page-about .about-index__link[aria-current="true"] {
    background: transparent;
    border-left-color: var(--gold);
  }

  .page-about .about-section {
    padding: clamp(40px, 6vw, 72px) 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-track__dot,
  .page-about .about-track__stage,
  .page-about .about-track__text,
  .page-about .about-index__link,
  .page-about .about-link {
    transition: none;
  }
}
<<<END>>>