.page-about {
  --about-rail: 148px;
  --about-rule: rgba(11, 58, 122, .16);
  --about-rule-dark: rgba(0, 231, 193, .28);
  background: var(--cloud);
  color: var(--ink);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero__inner {
  padding-block: clamp(22px, 3.6vw, 44px) clamp(38px, 6vw, 78px);
}

.page-about .about-hero__frame {
  position: relative;
  margin-top: clamp(18px, 2.6vw, 32px);
  padding: clamp(22px, 3.4vw, 52px);
  border: 1px solid rgba(220, 230, 247, .38);
  background:
    linear-gradient(158deg, rgba(0, 231, 193, .10), rgba(0, 231, 193, 0) 52%),
    linear-gradient(0deg, rgba(245, 248, 255, .04), rgba(245, 248, 255, 0));
}

.page-about .about-hero__frame::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 9px;
  background-image: repeating-linear-gradient(to right, rgba(0, 231, 193, .7) 0 1px, transparent 1px 28px);
  pointer-events: none;
}

.page-about .about-hero__frame::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 9px;
  background-image: repeating-linear-gradient(to right, rgba(0, 231, 193, .35) 0 1px, transparent 1px 28px);
  pointer-events: none;
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(16px, 2.6vw, 30px);
}

.page-about .about-hero__side {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(245, 248, 255, .22);
}

.page-about .about-hero__sidelabel {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: .14em;
  color: rgba(245, 248, 255, .82);
}

.page-about .about-hero__since {
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.8;
  letter-spacing: .06em;
  color: var(--cyan);
}

.page-about .about-hero__main .display {
  margin: 14px 0 0;
  line-height: 1.04;
  letter-spacing: -.018em;
}

.page-about .about-hero__main .lede {
  max-width: 58ch;
  margin-top: clamp(16px, 2.2vw, 24px);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 36px);
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(30px, 5vw, 76px);
  }

  .page-about .about-hero__side {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    padding: 0 20px 0 0;
    border-bottom: 0;
    border-right: 1px solid rgba(245, 248, 255, .22);
  }
}

/* ---------- 通用章节骨架 ---------- */
.page-about .sheet {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(14px, 2.2vw, 26px);
}

.page-about .sheet__rail {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--about-rule);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--slate);
}

.page-about .sheet__raillabel {
  text-transform: uppercase;
}

.page-about .panel--teal .sheet__rail,
.page-about .panel--indigo .sheet__rail {
  border-top-color: var(--about-rule-dark);
  color: rgba(245, 248, 255, .62);
}

.page-about .about-head {
  max-width: 74ch;
}

.page-about .about-head .section__title {
  margin: 0;
  line-height: 1.18;
  color: var(--fg, var(--ink));
}

.page-about .about-head .lede {
  margin-top: 14px;
  max-width: 62ch;
}

.page-about .about-cols {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3vw, 40px);
  margin-top: clamp(22px, 3vw, 38px);
}

.page-about .about-cols--tight {
  margin-top: clamp(24px, 3vw, 40px);
}

.page-about .about-note {
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-about .about-note__text {
  margin: 0;
  padding-left: 14px;
  border-left: 2px solid var(--sky);
  font-size: 14px;
  line-height: 1.75;
  color: var(--slate);
}

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

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

.page-about .about-figure .media__caption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.7;
  letter-spacing: .02em;
  color: var(--slate);
}

@media (min-width: 1080px) {
  .page-about .about-cols {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(32px, 4.4vw, 68px);
  }
}

@media (min-width: 900px) {
  .page-about .sheet {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(30px, 5vw, 76px);
  }

  .page-about .sheet__rail {
    position: sticky;
    top: calc(var(--header-h) + 26px);
    align-self: start;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    padding-top: 12px;
  }
}

/* ---------- 团队分工 ---------- */
.page-about .about-staff__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 3.4vw, 48px);
  margin-top: clamp(26px, 3.6vw, 46px);
}

.page-about .about-staff__roster {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: rgba(245, 248, 255, .22);
  border: 1px solid rgba(245, 248, 255, .22);
}

.page-about .about-card {
  background: var(--teal);
  padding: clamp(18px, 2.4vw, 28px);
  transition: background .3s var(--ease);
}

.page-about .about-card:hover,
.page-about .about-card:focus-visible {
  background: #084A46;
  outline: none;
}

.page-about .about-card:focus-visible {
  box-shadow: inset 0 0 0 2px var(--orange);
}

.page-about .about-card__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(34px, 4.4vw, 54px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--cyan);
}

.page-about .about-card__title {
  margin: 10px 0 6px;
  font-size: 17px;
  font-weight: 600;
  letter-spacing: .03em;
  color: var(--cloud);
}

.page-about .about-card__desc {
  margin: 0;
  font-size: 14px;
  font-weight: 300;
  line-height: 1.78;
  color: rgba(245, 248, 255, .74);
}

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

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

.page-about .about-staff__figure .media__caption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.7;
  letter-spacing: .04em;
  color: rgba(245, 248, 255, .62);
}

@media (min-width: 640px) {
  .page-about .about-staff__roster {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .page-about .about-staff__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    align-items: start;
  }
}

/* ---------- 服务范围 ---------- */
.page-about .about-scope__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin-top: clamp(24px, 3.2vw, 40px);
  background: var(--about-rule);
  border: 1px solid var(--about-rule);
}

.page-about .about-scope__item {
  background: #ffffff;
  padding: clamp(20px, 2.6vw, 32px);
}

.page-about .about-scope__idx {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--slate);
}

.page-about .about-scope__title {
  margin: 12px 0 10px;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--sky);
}

.page-about .about-scope__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--ink);
}

@media (min-width: 720px) {
  .page-about .about-scope__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1180px) {
  .page-about .about-scope__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 版本时间线 ---------- */
.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: clamp(26px, 3.6vw, 46px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
}

.page-about .about-timeline__node {
  position: relative;
  padding: 0 0 28px 30px;
  border-left: 1px solid var(--about-rule-dark);
}

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

.page-about .about-timeline__node::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 4px;
  width: 7px;
  height: 7px;
  background: var(--cyan);
}

.page-about .about-timeline__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .16em;
  color: var(--cyan);
}

.page-about .about-timeline__title {
  margin: 8px 0 8px;
  font-size: 16.5px;
  font-weight: 600;
  line-height: 1.45;
  color: var(--cloud);
}

.page-about .about-timeline__desc {
  margin: 0;
  max-width: 46ch;
  font-size: 14px;
  font-weight: 300;
  line-height: 1.78;
  color: rgba(245, 248, 255, .72);
}

.page-about .about-version__figure {
  margin: clamp(30px, 4vw, 52px) 0 0;
}

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

.page-about .about-version__figure .media__caption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.7;
  letter-spacing: .04em;
  color: rgba(245, 248, 255, .6);
}

@media (min-width: 880px) {
  .page-about .about-timeline {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-timeline__node {
    padding: 22px 22px 0 0;
    border-left: 0;
    border-top: 1px solid var(--about-rule-dark);
  }

  .page-about .about-timeline__node::before {
    left: 0;
    top: -4px;
  }

  .page-about .about-timeline__desc {
    max-width: none;
    padding-right: 12px;
  }
}

/* ---------- 数据源 ---------- */
.page-about .about-sources__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 34px);
  align-items: end;
  margin-top: clamp(22px, 3vw, 36px);
  padding-bottom: clamp(20px, 2.6vw, 30px);
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-sources__metric {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.page-about .about-sources__value {
  font-family: var(--font-mono);
  font-size: clamp(58px, 8vw, 104px);
  font-weight: 800;
  line-height: .92;
  letter-spacing: -.03em;
  color: var(--sky);
}

.page-about .about-sources__label {
  font-size: 14px;
  letter-spacing: .06em;
  color: var(--slate);
}

.page-about .about-sources__types {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-sources__type {
  padding: 8px 16px;
  border: 1px solid var(--sky);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--sky);
}

.page-about .about-sources__api {
  align-self: start;
  padding: clamp(20px, 2.6vw, 30px);
  background: var(--sky);
  color: var(--cloud);
}

.page-about .about-sources__api-title {
  margin: 0 0 12px;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--cyan);
}

.page-about .about-sources__api-text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(245, 248, 255, .88);
}

@media (min-width: 780px) {
  .page-about .about-sources__grid {
    grid-template-columns: auto minmax(0, 1fr);
    justify-content: space-between;
  }
}

/* ---------- 支持 ---------- */
.page-about .about-support__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.4vw, 44px);
  padding: clamp(24px, 3.4vw, 46px);
  border: 1px solid var(--mist);
  border-left: 4px solid var(--sky);
  background: #ffffff;
}

.page-about .about-support__copy .section__title {
  margin: 12px 0 16px;
  color: var(--sky);
}

.page-about .about-support__copy p {
  margin: 0 0 12px;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--ink);
}

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

.page-about .about-support__actions {
  display: flex;
  flex-wrap: wrap;
  align-content: start;
  gap: 12px;
}

.page-about .about-support__actions .btn--ghost {
  border-color: var(--sky);
  color: var(--sky);
}

@media (min-width: 900px) {
  .page-about .about-support__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: start;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .about-card {
    transition: none;
  }
}
<<<END>>>