.page-about {
  background: var(--abyss);
  color: var(--paper);
}

.page-about .about-crumb {
  padding-top: 88px;
  padding-bottom: 4px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 24px 0 64px;
  background-color: var(--abyss);
}

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

.page-about .about-hero__bg img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .3;
  filter: saturate(.6) contrast(1.05);
}

.page-about .about-hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(4, 24, 28, .74) 0%, rgba(4, 24, 28, .97) 78%),
    repeating-linear-gradient(0deg, rgba(37, 244, 208, .07) 0 1px, transparent 1px 8px);
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 28px;
}

.page-about .about-hero__card {
  background: var(--paper);
  color: var(--ink);
  padding: 26px 22px;
  border-left: 4px solid var(--coral);
}

.page-about .about-hero__card .eyebrow {
  color: var(--coral-deep);
}

.page-about .about-hero__card h1 {
  margin: 12px 0 16px;
  font-family: var(--font-display);
  font-size: clamp(34px, 6.2vw, 82px);
  font-weight: 900;
  line-height: .98;
  letter-spacing: -.02em;
  color: var(--ink);
}

.page-about .about-hero__lead {
  max-width: 46ch;
  margin: 0;
  font-size: 16px;
  line-height: 1.78;
  color: rgba(11, 17, 18, .82);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-about .about-hero__panel {
  background: var(--trench);
  border: 1px solid var(--line-strong);
  border-top: 3px solid var(--fluor);
  padding: 20px 18px;
}

.page-about .about-hero__panel-title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--fluor);
}

.page-about .about-facts {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px 14px;
}

.page-about .about-facts li {
  border-top: 1px solid var(--line);
  padding-top: 10px;
}

.page-about .about-facts__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(26px, 5vw, 40px);
  line-height: 1;
  color: var(--fluor);
}

.page-about .about-facts__label {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  line-height: 1.4;
  letter-spacing: .06em;
  color: var(--mist);
}

/* ---------- 通用章节 ---------- */
.page-about .about-band {
  padding: clamp(48px, 7vw, 96px) 0;
}

.page-about .about-head {
  max-width: 760px;
  margin-bottom: 34px;
}

.page-about .about-head h2 {
  margin: 12px 0 14px;
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 52px);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-about .about-head p {
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .about-head--ink h2 {
  color: var(--ink);
}

.page-about .about-head--ink p {
  color: rgba(11, 17, 18, .78);
}

.page-about .about-eyebrow--ink {
  color: var(--coral-deep);
}

/* ---------- 运营主张 ---------- */
.page-about .about-brief__grid {
  display: grid;
  gap: 24px;
}

.page-about .about-brief__main {
  position: relative;
  background: var(--paper);
  color: var(--ink);
  padding: 30px 22px;
  border-top: 4px solid var(--fluor);
}

.page-about .about-brief__main .tag-cut {
  color: var(--coral-deep);
  border-color: var(--coral-deep);
}

.page-about .about-brief__main h2 {
  margin: 16px 0 16px;
  font-family: var(--font-display);
  font-size: clamp(26px, 3.6vw, 42px);
  font-weight: 900;
  line-height: 1.12;
  color: var(--ink);
}

.page-about .about-brief__main p {
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(11, 17, 18, .82);
}

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

.page-about .about-note {
  align-self: start;
  background: var(--deep);
  border: 1px solid var(--line-strong);
  border-left: 3px solid var(--coral);
  padding: 22px 20px;
}

.page-about .about-note .tag-cut {
  color: var(--fluor);
  border-color: var(--line-strong);
}

.page-about .about-note__code {
  margin: 14px 0 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--fluor);
}

.page-about .about-note p:last-child {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 七个栏目 ---------- */
.page-about .about-catalog {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-catalog__item {
  display: grid;
  gap: 8px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
  transition: background .18s var(--ease);
}

.page-about .about-catalog__item:hover,
.page-about .about-catalog__item:focus-within {
  background: rgba(37, 244, 208, .05);
}

.page-about .about-catalog__idx {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--fluor);
}

.page-about .about-catalog__item h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 900;
  color: var(--paper);
}

.page-about .about-catalog__item p {
  margin: 8px 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .about-catalog__meta {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  line-height: 1.6;
  color: rgba(158, 184, 180, .85);
}

/* ---------- 运营流程 ---------- */
.page-about .about-flow__grid {
  display: grid;
  gap: 28px;
}

.page-about .about-figure {
  margin: 0;
  background: var(--trench);
  border: 1px solid var(--line-strong);
}

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

.page-about .about-figure figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--mist);
}

.page-about .about-flow__body h2 {
  margin: 12px 0 14px;
  font-family: var(--font-display);
  font-size: clamp(26px, 3.6vw, 44px);
  font-weight: 900;
  line-height: 1.08;
  color: var(--paper);
}

.page-about .about-flow__lead {
  margin: 0 0 22px;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .about-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-step {
  position: relative;
  background: var(--paper);
  color: var(--ink);
  padding: 18px 18px 18px 56px;
}

.page-about .about-step__num {
  position: absolute;
  left: 16px;
  top: 19px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 15px;
  color: var(--coral-deep);
}

.page-about .about-step h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 900;
  color: var(--ink);
}

.page-about .about-step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: rgba(11, 17, 18, .8);
}

.page-about .about-flow__foot {
  margin: 20px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--fluo, var(--fluor));
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 阶段轴 ---------- */
.page-about .about-timeline-band {
  background: var(--paper);
  color: var(--ink);
  padding: clamp(48px, 7vw, 96px) 0;
}

.page-about .about-anchors {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 30px;
}

.page-about .about-anchor {
  display: inline-block;
  padding: 7px 13px;
  border: 1px solid rgba(11, 17, 18, .3);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--ink);
  text-decoration: none;
  transition: background .18s var(--ease), color .18s var(--ease);
}

.page-about .about-anchor:hover,
.page-about .about-anchor:focus-visible {
  background: var(--ink);
  color: var(--paper);
}

.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 30px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: rgba(11, 17, 18, .28);
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 30px 4px;
  scroll-margin-top: 120px;
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 4px;
  width: 15px;
  height: 15px;
  background: var(--fluor);
  border: 1px solid var(--ink);
}

.page-about .about-timeline__stage {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--coral-deep);
}

.page-about .about-timeline__item h3 {
  margin: 8px 0 8px;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 900;
  color: var(--ink);
}

.page-about .about-timeline__item p {
  margin: 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(11, 17, 18, .78);
}

/* ---------- 团队与生态 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: 30px;
}

.page-about .about-team__body h2 {
  margin: 12px 0 16px;
  font-family: var(--font-display);
  font-size: clamp(26px, 3.6vw, 44px);
  font-weight: 900;
  line-height: 1.08;
  color: var(--paper);
}

.page-about .about-team__body > p {
  margin: 0 0 26px;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .about-bars {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-bar:focus-visible {
  outline: 2px solid var(--fluor);
  outline-offset: 4px;
}

.page-about .about-bar__row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 7px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--mist);
}

.page-about .about-bar__track {
  display: block;
  height: 12px;
  background: var(--deep);
  border: 1px solid var(--line);
}

.page-about .about-bar__fill {
  display: block;
  height: 100%;
  background: var(--fluor);
  transition: background .18s var(--ease), width .3s var(--ease);
}

.page-about .about-bar--a .about-bar__fill { width: 39.1%; }
.page-about .about-bar--b .about-bar__fill { width: 19.6%; }
.page-about .about-bar--c .about-bar__fill { width: 23.9%; }
.page-about .about-bar--d .about-bar__fill { width: 17.4%; }

.page-about .about-bar:hover .about-bar__fill,
.page-about .about-bar:focus .about-bar__fill {
  background: var(--coral);
}

.page-about .about-team__side {
  display: grid;
  gap: 20px;
}

.page-about .about-partners {
  background: var(--trench);
  border: 1px solid var(--line);
  border-left: 3px solid var(--fluor);
  padding: 20px 18px;
}

.page-about .about-partners p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 服务承诺 ---------- */
.page-about .about-promise {
  display: grid;
  gap: 16px;
}

.page-about .about-promise__card {
  background: var(--trench);
  border: 1px solid var(--line);
  border-top: 2px solid var(--fluor);
  padding: 22px 18px;
}

.page-about .about-promise__card h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 900;
  color: var(--paper);
}

.page-about .about-promise__card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  background: var(--coral);
  color: var(--ink);
  padding: clamp(38px, 5vw, 68px) 0;
}

.page-about .about-cta__inner {
  display: grid;
  gap: 22px;
}

.page-about .about-cta h2 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(26px, 3.4vw, 44px);
  font-weight: 900;
  line-height: 1.1;
  color: var(--ink);
}

.page-about .about-cta p {
  margin: 0;
  max-width: 54ch;
  font-size: 15px;
  line-height: 1.7;
  color: rgba(11, 17, 18, .84);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-cta__btn {
  display: inline-block;
  padding: 13px 22px;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
  transition: transform .18s var(--ease), background .18s var(--ease);
}

.page-about .about-cta__btn:hover,
.page-about .about-cta__btn:focus-visible {
  transform: translateY(-2px);
}

.page-about .about-cta__btn--line {
  background: transparent;
  color: var(--ink);
  border: 1px solid rgba(11, 17, 18, .6);
}

.page-about .about-cta__btn--line:hover,
.page-about .about-cta__btn--line:focus-visible {
  background: var(--ink);
  color: var(--paper);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-crumb {
    padding-top: 104px;
  }

  .page-about .about-hero__inner {
    grid-template-columns: 1.15fr .85fr;
    align-items: start;
    gap: 34px;
  }

  .page-about .about-hero__card {
    padding: 34px 30px;
  }

  .page-about .about-brief__grid {
    grid-template-columns: 1.5fr .85fr;
    align-items: start;
    gap: 28px;
  }

  .page-about .about-brief__main {
    padding: 38px 32px;
  }

  .page-about .about-catalog__item {
    grid-template-columns: 58px 1fr 210px;
    gap: 20px;
    align-items: start;
    padding: 24px 0;
  }

  .page-about .about-catalog__meta {
    text-align: right;
  }

  .page-about .about-flow__grid {
    grid-template-columns: 1fr 1fr;
    align-items: start;
    gap: 34px;
  }

  .page-about .about-team__grid {
    grid-template-columns: 1.05fr .95fr;
    align-items: start;
    gap: 34px;
  }

  .page-about .about-promise {
    grid-template-columns: 1fr 1fr;
    gap: 18px;
  }

  .page-about .about-cta__inner {
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 28px;
  }

  .page-about .about-cta__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 1080px) {
  .page-about .about-hero {
    padding-top: 34px;
    padding-bottom: 84px;
  }

  .page-about .about-hero__card {
    padding: 44px 38px;
  }

  .page-about .about-hero__panel {
    transform: rotate(-1.4deg);
  }

  .page-about .about-timeline {
    padding-left: 44px;
  }

  .page-about .about-timeline::before {
    left: 7px;
  }

  .page-about .about-timeline__item::before {
    left: -44px;
  }

  .page-about .about-timeline__item {
    padding-bottom: 38px;
    padding-left: 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-hero__panel {
    transform: none;
  }

  .page-about .about-cta__btn:hover,
  .page-about .about-cta__btn:focus-visible {
    transform: none;
  }

  .page-about .about-bar__fill {
    transition: none;
  }
}
<<<END>>>

.page-about {
  --fluo: currentColor;
}