.page-about {
  --about-rail-w: 196px;
  --about-num-ink: rgba(106, 77, 255, .26);
  display: block;
}

/* ---------- 首屏框景 ---------- */
.page-about .about-hero {
  padding: 22px 0 0;
}

.page-about .about-hero__frame {
  position: relative;
  margin-top: 18px;
  padding: 30px 18px 24px;
  border: 1px solid var(--line-purple);
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(53, 240, 216, .10), transparent 58%),
    linear-gradient(180deg, var(--ink-night), var(--ink-void));
  overflow: hidden;
}

.page-about .about-hero__frame::before,
.page-about .about-hero__frame::after {
  content: "";
  position: absolute;
  width: 22px;
  height: 22px;
  border: 2px solid var(--neon);
  pointer-events: none;
}

.page-about .about-hero__frame::before {
  top: -1px;
  left: -1px;
  border-right: 0;
  border-bottom: 0;
}

.page-about .about-hero__frame::after {
  right: -1px;
  bottom: -1px;
  border-top: 0;
  border-left: 0;
}

.page-about .about-hero__ruler {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 10px;
  background-image: repeating-linear-gradient(90deg, var(--line-purple) 0 1px, transparent 1px 18px);
  opacity: .75;
  pointer-events: none;
}

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

.page-about .about-hero__title {
  margin: 12px 0 0;
  font-size: clamp(30px, 7.4vw, 58px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -.02em;
  color: var(--white);
}

.page-about .about-hero__title em {
  font-style: normal;
  color: var(--neon);
}

.page-about .about-hero__lead {
  margin: 16px 0 0;
  max-width: 44ch;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(242, 240, 250, .82);
}

.page-about .about-hero__panel {
  margin-top: 24px;
  padding: 18px 16px;
}

.page-about .about-facts {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-about .about-facts li {
  display: flex;
  gap: 12px;
  align-items: baseline;
  justify-content: space-between;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--line-purple);
}

.page-about .about-facts li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .about-facts__label {
  font-size: 13px;
  color: var(--mist);
}

.page-about .about-facts__value {
  font-family: var(--font-num);
  font-size: 26px;
  line-height: 1;
  color: var(--neon);
  letter-spacing: .02em;
  font-variant-numeric: tabular-nums;
}

.page-about .about-facts__value--sm {
  font-size: 17px;
  letter-spacing: .04em;
}

.page-about .about-facts__unit {
  margin-left: 2px;
  font-size: 14px;
  color: var(--mist);
  font-family: var(--font-sans);
}

/* ---------- 页面主体框架 ---------- */
.page-about .about-body {
  padding-top: 34px;
  padding-bottom: 48px;
}

.page-about .about-rail {
  margin-bottom: 28px;
}

.page-about .about-rail__title {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: .3em;
  color: var(--mist);
}

.page-about .about-rail__list {
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-rail__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--line-purple);
  background: var(--ink-night);
  color: var(--white);
  font-size: 13px;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color .18s var(--ease), color .18s var(--ease), background-color .18s var(--ease);
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  border-color: var(--neon);
  color: var(--neon);
  background: rgba(53, 240, 216, .08);
}

.page-about .about-rail__link:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 2px;
}

.page-about .about-rail__num {
  font-family: var(--font-num);
  font-size: 14px;
  color: var(--mist);
  font-variant-numeric: tabular-nums;
}

/* ---------- 章节通用 ---------- */
.page-about .about-section {
  padding-top: 42px;
}

.page-about .about-section + .about-section {
  margin-top: 14px;
  border-top: 1px dashed rgba(58, 42, 99, .8);
}

.page-about .about-section__head {
  display: flex;
  align-items: flex-end;
  gap: 14px;
  margin-bottom: 20px;
}

.page-about .about-section__headings {
  min-width: 0;
}

.page-about .about-section__num {
  flex: none;
  font-family: var(--font-num);
  font-size: clamp(50px, 13vw, 96px);
  font-weight: 700;
  line-height: .74;
  letter-spacing: -.03em;
  color: var(--about-num-ink);
  font-variant-numeric: tabular-nums;
  user-select: none;
}

.page-about .section__title {
  margin: 4px 0 0;
}

.page-about .about-narrow {
  max-width: 38ch;
}

.page-about .prose p {
  color: rgba(242, 240, 250, .84);
}

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

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

.page-about .about-points__item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 14px 16px;
  border: 1px solid var(--line-purple);
  border-left: 2px solid var(--neon);
  background: var(--ink-panel);
  font-size: 14.5px;
  line-height: 1.7;
  color: rgba(242, 240, 250, .84);
}

.page-about .about-points__dot {
  flex: none;
  width: 8px;
  height: 8px;
  margin-top: 8px;
  border-radius: 50%;
  background: var(--neon);
}

/* ---------- 覆盖版图 ---------- */
.page-about .about-section--coverage {
  position: relative;
  margin-top: 34px;
  padding: 30px 18px 32px;
  border: 1px solid var(--line-purple);
  border-top: 1px solid var(--line-purple);
  overflow: hidden;
  isolation: isolate;
  background: var(--ink-void);
}

.page-about .about-coverage__visual {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.page-about .about-coverage__visual img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .26;
}

.page-about .about-section--coverage::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(180deg, rgba(18, 10, 36, .58), rgba(18, 10, 36, .93));
}

.page-about .about-coverage__intro {
  margin: 0 0 22px;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: rgba(242, 240, 250, .84);
}

.page-about .tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.page-about .tab {
  padding: 10px 16px;
  border: 1px solid var(--line-purple);
  background: rgba(18, 10, 36, .66);
  color: var(--white);
  font: inherit;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .06em;
  cursor: pointer;
  transition: border-color .18s var(--ease), color .18s var(--ease), background-color .18s var(--ease);
}

.page-about .tab:hover {
  border-color: var(--neon-soft);
  color: var(--neon-soft);
}

.page-about .tab:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 2px;
}

.page-about .tab[aria-selected="true"] {
  border-color: var(--neon);
  color: var(--neon);
  background: rgba(53, 240, 216, .12);
}

.page-about .tabs__panel + .tabs__panel {
  margin-top: 22px;
}

.page-about .about-coverage__grid {
  display: grid;
  gap: 18px;
  padding: 18px 16px;
  border: 1px dashed var(--line-purple);
  background: rgba(27, 16, 54, .62);
}

.page-about .about-coverage__stat {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-purple);
}

.page-about .about-coverage__stat .data-num--xl {
  color: var(--neon);
}

.page-about .about-coverage__stat-label {
  font-size: 13.5px;
  color: var(--mist);
}

.page-about .about-coverage__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-about .about-coverage__list li {
  position: relative;
  padding-left: 18px;
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(242, 240, 250, .84);
}

.page-about .about-coverage__list li::before {
  content: "";
  position: absolute;
  top: 9px;
  left: 0;
  width: 8px;
  height: 8px;
  border: 1px solid var(--neon);
  transform: rotate(45deg);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: 24px;
}

.page-about .about-team__media {
  aspect-ratio: 3 / 2;
}

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

.page-about .about-roles {
  display: grid;
  gap: 14px;
  margin-top: 28px;
}

.page-about .about-role {
  position: relative;
  padding: 20px 16px 18px;
  border: 1px solid var(--line-purple);
  background: var(--ink-panel);
}

.page-about .about-role::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 36px;
  height: 2px;
  background: var(--neon);
}

.page-about .about-role__idx {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: .18em;
  color: var(--mist);
}

.page-about .about-role__name {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 800;
  color: var(--white);
}

.page-about .about-role__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: rgba(242, 240, 250, .76);
}

.page-about .about-shift {
  margin-top: 24px;
  padding: 18px 16px;
  border: 1px solid var(--line-purple);
  background: linear-gradient(100deg, rgba(53, 240, 216, .10), transparent 62%);
}

.page-about .about-shift__bar {
  height: 6px;
  margin-bottom: 14px;
  background: var(--line-purple);
}

.page-about .about-shift__bar span {
  display: block;
  width: 68%;
  height: 100%;
  background: linear-gradient(90deg, var(--neon), var(--violet));
}

.page-about .about-shift__text {
  margin: 0;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(242, 240, 250, .84);
}

/* ---------- 技术基座 ---------- */
.page-about .about-tech {
  display: grid;
  gap: 24px;
}

.page-about .about-tech__media {
  aspect-ratio: 1 / 1;
  max-width: 380px;
}

/* ---------- 历程 ---------- */
.page-about .about-timeline {
  position: relative;
  margin-top: 22px;
  padding-left: 28px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  top: 8px;
  bottom: 8px;
  left: 6px;
  width: 2px;
  background: linear-gradient(180deg, var(--neon), var(--violet) 58%, rgba(58, 42, 99, .5));
}

.page-about .about-phase {
  position: relative;
  padding-bottom: 22px;
}

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

.page-about .about-phase::before {
  content: "";
  position: absolute;
  top: 8px;
  left: -28px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--neon);
  box-shadow: 0 0 0 4px rgba(53, 240, 216, .16);
}

.page-about .about-phase__label {
  margin: 0 0 10px;
  font-family: var(--font-num);
  font-size: 15px;
  letter-spacing: .1em;
  color: var(--neon);
  font-variant-numeric: tabular-nums;
}

.page-about .about-phase .fold {
  border: 1px solid var(--line-purple);
  background: var(--ink-night);
  padding: 0 14px;
}

.page-about .about-phase .fold__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(242, 240, 250, .82);
}

/* ---------- 合作 ---------- */
.page-about .about-partners {
  display: grid;
  gap: 14px;
}

.page-about .about-partner {
  padding: 20px 16px;
}

.page-about .about-partner__num {
  display: block;
  font-size: 44px;
  line-height: 1;
  color: var(--neon);
}

.page-about .about-partner__title {
  margin: 10px 0 8px;
  font-size: 15.5px;
  font-weight: 800;
  color: var(--white);
}

.page-about .about-partner__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: rgba(242, 240, 250, .76);
}

.page-about .about-partners__note {
  margin: 20px 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--violet);
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(242, 240, 250, .84);
}

/* ---------- 我们的做法 ---------- */
.page-about .about-principles {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.page-about .about-principle {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 20px 16px;
  border: 1px solid var(--line-purple);
  background: var(--ink-panel);
}

.page-about .about-principle__idx {
  flex: none;
  font-family: var(--font-num);
  font-size: 40px;
  line-height: .8;
  color: rgba(53, 240, 216, .35);
  font-variant-numeric: tabular-nums;
}

.page-about .about-principle__name {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 800;
  color: var(--white);
}

.page-about .about-principle__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.76;
  color: rgba(242, 240, 250, .8);
}

/* ---------- 结尾路径 ---------- */
.page-about .about-cta {
  display: grid;
  gap: 18px;
  margin-top: 48px;
  padding: 26px 18px;
  border: 1px solid var(--neon);
  background:
    radial-gradient(120% 120% at 100% 0%, rgba(106, 77, 255, .22), transparent 60%),
    linear-gradient(120deg, rgba(53, 240, 216, .12), rgba(27, 16, 54, .9));
}

.page-about .about-cta__title {
  margin: 6px 0 0;
  font-size: clamp(21px, 4.6vw, 30px);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -.01em;
  color: var(--white);
}

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

.page-about .about-cta__links {
  margin: 0;
  grid-column: 1 / -1;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-cta__links a {
  color: var(--neon);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 240, 216, .45);
}

.page-about .about-cta__links a:hover,
.page-about .about-cta__links a:focus-visible {
  color: var(--neon-soft);
  border-bottom-color: var(--neon-soft);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .about-hero__frame {
    padding: 34px 28px 28px;
  }

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

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

  .page-about .about-coverage__grid {
    padding: 22px 20px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding-top: 28px;
  }

  .page-about .about-hero__frame {
    display: grid;
    grid-template-columns: minmax(0, 1.35fr) minmax(290px, .65fr);
    gap: 36px;
    align-items: end;
    padding: 44px 40px 36px 58px;
  }

  .page-about .about-hero__annot {
    display: block;
    position: absolute;
    top: 46px;
    left: 18px;
    writing-mode: vertical-rl;
    font-size: 12px;
    letter-spacing: .3em;
    color: var(--mist);
    white-space: nowrap;
  }

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

  .page-about .about-cols {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 1fr) minmax(0, .86fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .about-team__media {
    margin-top: -26px;
  }

  .page-about .about-tech {
    grid-template-columns: minmax(0, 1fr) minmax(0, .72fr);
    gap: 46px;
    align-items: center;
  }

  .page-about .about-tech__media {
    justify-self: end;
  }

  .page-about .about-coverage__grid {
    grid-template-columns: minmax(190px, .5fr) minmax(0, 1.5fr);
    gap: 26px;
    align-items: start;
  }

  .page-about .about-coverage__stat {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    padding-bottom: 0;
    border-bottom: 0;
    border-right: 1px solid var(--line-purple);
    padding-right: 22px;
    height: 100%;
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    padding: 32px 30px;
  }
}

@media (min-width: 1100px) {
  .page-about .about-roles {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .page-about .about-body {
    display: grid;
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: 56px;
    align-items: start;
    padding-top: 48px;
  }

  .page-about .about-rail {
    position: sticky;
    top: 92px;
    margin-bottom: 0;
    padding-right: 18px;
    border-right: 1px solid var(--line-purple);
  }

  .page-about .about-rail__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-rail__link {
    width: 100%;
    padding: 9px 0 9px 12px;
    border: 0;
    border-left: 2px solid transparent;
    background: transparent;
    font-size: 14px;
  }

  .page-about .about-rail__link:hover,
  .page-about .about-rail__link:focus-visible {
    border-left-color: var(--neon);
    background: rgba(53, 240, 216, .07);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-rail__link,
  .page-about .tab {
    transition: none;
  }
}
</main>