.page-about {
  background: var(--paper);
  color: var(--ink);
  overflow-x: clip;
}

.page-about .about-crumb {
  padding-top: 22px;
  padding-bottom: 6px;
}

/* ===== 首屏 ===== */
.page-about .about-hero {
  padding: 10px 0 52px;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 32px;
  grid-template-columns: 1fr;
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 56px;
    align-items: center;
  }
}

.page-about .about-hero__kicker {
  color: var(--blue);
  margin: 0 0 4px;
}

.page-about .about-hero__title {
  font-size: clamp(34px, 6.6vw, 62px);
  line-height: 1.07;
  letter-spacing: -0.02em;
  font-weight: 800;
  margin: 10px 0 18px;
  color: var(--ink);
}

.page-about .about-hero__lede {
  max-width: 52ch;
  color: var(--shale);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 20px 30px;
  margin: 32px 0 0;
  padding: 20px 0 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.page-about .about-hero__stats li {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.page-about .about-hero__num {
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--blue-deep);
  letter-spacing: 0.02em;
}

.page-about .about-hero__stats em {
  font-style: normal;
  font-size: 13px;
  color: var(--shale);
}

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

.page-about .about-hero__media {
  aspect-ratio: 3 / 2;
  border-radius: var(--r-lg);
  overflow: hidden;
  background: linear-gradient(140deg, var(--blue-soft) 0%, var(--ice) 55%, var(--ink-soft) 130%);
  box-shadow: var(--shadow-1);
}

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

/* ===== 区块标题 ===== */
.page-about .about-sec-head {
  max-width: 62ch;
}

.page-about .about-sec-head h2 {
  font-size: clamp(26px, 3.6vw, 38px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  font-weight: 800;
  margin: 8px 0 12px;
  color: var(--ink);
}

.page-about .about-sec-head .lede {
  color: var(--shale);
  margin: 0;
}

.page-about .about-sec-head--dark h2 {
  color: var(--paper);
}

.page-about .about-sec-head--dark .lede {
  color: var(--blue-soft);
}

/* ===== 起点 ===== */
.page-about .about-origin {
  padding: 20px 0 64px;
}

.page-about .about-origin__grid {
  display: grid;
  gap: 32px;
  grid-template-columns: 1fr;
}

@media (min-width: 900px) {
  .page-about .about-origin__grid {
    grid-template-columns: 1.5fr 1fr;
    gap: 56px;
    align-items: start;
  }
}

.page-about .about-origin__title {
  font-size: clamp(24px, 3.2vw, 34px);
  line-height: 1.2;
  letter-spacing: -0.02em;
  font-weight: 800;
  margin: 14px 0 16px;
}

.page-about .about-origin__text p {
  color: var(--shale);
  max-width: 60ch;
}

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

.page-about .about-origin__aside {
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.page-about .about-origin__board {
  position: relative;
  background: var(--ink);
  color: var(--paper);
  border-radius: var(--r-lg);
  padding: 26px 24px 24px;
  overflow: hidden;
}

.page-about .about-origin__board::after {
  content: "";
  position: absolute;
  inset: auto -30px -60px auto;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, var(--blue) 0%, transparent 70%);
  opacity: 0.55;
  pointer-events: none;
}

.page-about .about-origin__num {
  font-size: clamp(40px, 6vw, 56px);
  font-weight: 700;
  line-height: 1;
  margin: 18px 0 8px;
  color: var(--white);
  letter-spacing: 0.02em;
}

.page-about .about-origin__unit {
  font-size: 14px;
  color: var(--blue-soft);
  margin: 0;
}

.page-about .about-origin__list {
  list-style: none;
  padding: 0;
  margin: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-origin__list li {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
  color: var(--shale);
}

.page-about .about-origin__list .mono {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--blue-deep);
  min-width: 52px;
  font-size: 17px;
  letter-spacing: 0.02em;
}

/* ===== 人群画像 ===== */
.page-about .about-audience {
  padding: 8px 0 24px;
}

.page-about .about-audience__grid {
  display: grid;
  gap: 20px;
  margin-top: 34px;
  grid-template-columns: 1fr;
}

@media (min-width: 680px) {
  .page-about .about-audience__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1020px) {
  .page-about .about-audience__grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 22px;
  }
  .page-about .about-audience__card--b {
    margin-top: 20px;
  }
  .page-about .about-audience__card--c {
    margin-top: 8px;
  }
  .page-about .about-audience__card--d {
    margin-top: 28px;
  }
}

.page-about .about-audience__card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 24px 22px 22px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.page-about .about-audience__card .card__title {
  font-size: 20px;
  line-height: 1.3;
  margin: 0;
  color: var(--ink);
}

.page-about .about-audience__card p {
  font-size: 15px;
  color: var(--shale);
  margin: 0;
  flex: 1;
}

.page-about .about-audience__link {
  align-self: flex-start;
  font-size: 14px;
  font-weight: 600;
  color: var(--blue-deep);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  padding-bottom: 1px;
  transition: color 0.2s var(--ease);
}

.page-about .about-audience__card:hover,
.page-about .about-audience__card:focus-within {
  transform: translateY(-4px);
  border-color: var(--blue);
  box-shadow: var(--shadow-1);
}

.page-about .about-audience__link:hover,
.page-about .about-audience__link:focus-visible {
  color: var(--orange-deep);
}

/* ===== 三条原则（深色满宽） ===== */
.page-about .about-principles {
  margin-top: 56px;
  padding: 64px 0 68px;
  background: var(--ink);
  color: var(--paper);
}

.page-about .about-principles__list {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  display: grid;
  gap: 26px;
  grid-template-columns: 1fr;
  counter-reset: pri;
}

@media (min-width: 780px) {
  .page-about .about-principles__list {
    grid-template-columns: repeat(3, 1fr);
    gap: 34px;
  }
}

.page-about .about-principles__item {
  counter-increment: pri;
  border-top: 1px solid rgba(203, 230, 239, 0.28);
  padding-top: 20px;
}

.page-about .about-principles__item::before {
  content: "0" counter(pri);
  display: block;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.14em;
  color: var(--blue-soft);
  margin-bottom: 14px;
}

.page-about .about-principles__item h3 {
  font-size: 21px;
  line-height: 1.3;
  margin: 0 0 10px;
  color: var(--white);
}

.page-about .about-principles__item p {
  font-size: 15px;
  color: var(--blue-soft);
  margin: 0;
}

/* ===== 版本服务地图 ===== */
.page-about .about-map {
  padding: 72px 0 8px;
}

.page-about .about-map__grid {
  display: grid;
  gap: 34px;
  grid-template-columns: 1fr;
}

@media (min-width: 900px) {
  .page-about .about-map__grid {
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    align-items: center;
  }
}

.page-about .about-map__title {
  font-size: clamp(24px, 3.2vw, 34px);
  line-height: 1.18;
  letter-spacing: -0.02em;
  font-weight: 800;
  margin: 14px 0 16px;
}

.page-about .about-map__copy p {
  color: var(--shale);
  max-width: 58ch;
}

.page-about .about-map__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px 28px;
  margin: 28px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--line);
}

.page-about .about-map__facts > div {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px dashed var(--line);
}

.page-about .about-map__facts dt {
  font-size: 13px;
  color: var(--shale);
}

.page-about .about-map__facts dd {
  margin: 0;
  font-weight: 700;
  font-size: 15px;
  color: var(--blue-deep);
}

.page-about .about-map__facts dd.mono {
  font-family: var(--font-mono);
  font-size: 20px;
  letter-spacing: 0.02em;
}

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

.page-about .about-map__media {
  aspect-ratio: 12 / 7;
  border-radius: var(--r-lg);
  overflow: hidden;
  background: linear-gradient(200deg, var(--ice) 0%, var(--blue-soft) 100%);
  box-shadow: var(--shadow-1);
}

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

/* ===== 团队 ===== */
.page-about .about-team {
  padding: 72px 0 8px;
}

.page-about .about-team__grid {
  display: grid;
  gap: 20px;
  margin-top: 32px;
  grid-template-columns: 1fr;
}

@media (min-width: 760px) {
  .page-about .about-team__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }
}

.page-about .about-team__card {
  padding: 26px 24px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-team__no {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--blue);
  margin: 0 0 14px;
}

.page-about .about-team__card .card__title {
  font-size: 20px;
  margin: 0 0 10px;
  color: var(--ink);
}

.page-about .about-team__card p:last-child {
  margin: 0;
  font-size: 15px;
  color: var(--shale);
}

.page-about .about-team__card:hover,
.page-about .about-team__card:focus-within {
  transform: translateY(-3px);
  border-color: var(--blue);
}

/* ===== 时间线 ===== */
.page-about .about-timeline {
  margin-top: 72px;
  padding: 64px 0 68px;
  background: linear-gradient(180deg, var(--ice) 0%, var(--paper) 100%);
}

.page-about .about-timeline__list {
  position: relative;
  list-style: none;
  margin: 40px 0 0;
  padding: 0;
  max-width: 720px;
}

.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 22px;
  width: 1px;
  background: linear-gradient(180deg, var(--blue) 0%, var(--blue-deep) 45%, var(--shale) 100%);
}

.page-about .about-timeline__item {
  position: relative;
  padding-left: 32px;
  padding-bottom: 34px;
}

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

.page-about .about-timeline__dot {
  position: absolute;
  left: 0;
  top: 6px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--blue);
  box-shadow: 0 0 0 3px var(--ice);
  transition: background 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-about .about-timeline__item:hover .about-timeline__dot,
.page-about .about-timeline__item:focus-within .about-timeline__dot {
  background: var(--orange);
  transform: scale(1.18);
}

.page-about .about-timeline__year {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.16em;
  color: var(--blue-deep);
  margin: 0 0 6px;
}

.page-about .about-timeline__item h3 {
  font-size: 19px;
  line-height: 1.3;
  margin: 0 0 7px;
  color: var(--ink);
  transition: color 0.2s var(--ease);
}

.page-about .about-timeline__item:hover h3 {
  color: var(--blue-deep);
}

.page-about .about-timeline__item p:last-child {
  margin: 0;
  font-size: 15px;
  color: var(--shale);
  max-width: 62ch;
}

/* ===== 资质与合作 ===== */
.page-about .about-eco {
  padding: 62px 0 8px;
}

.page-about .about-eco__grid {
  display: grid;
  gap: 32px;
  grid-template-columns: 1fr;
}

@media (min-width: 900px) {
  .page-about .about-eco__grid {
    grid-template-columns: 1.25fr 0.75fr;
    gap: 56px;
    align-items: center;
  }
}

.page-about .about-eco__title {
  font-size: clamp(24px, 3.2vw, 34px);
  line-height: 1.18;
  letter-spacing: -0.02em;
  font-weight: 800;
  margin: 14px 0 16px;
}

.page-about .about-eco__copy p {
  color: var(--shale);
  max-width: 62ch;
}

.page-about .about-eco__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-eco__list li {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
  color: var(--shale);
}

.page-about .about-eco__list .mono {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
  color: var(--blue-deep);
  letter-spacing: 0.02em;
  min-width: 80px;
}

/* ===== 行业用户 ===== */
.page-about .about-industry {
  padding: 72px 0 8px;
}

.page-about .about-industry__grid {
  display: grid;
  gap: 32px;
  grid-template-columns: 1fr;
}

@media (min-width: 900px) {
  .page-about .about-industry__grid {
    grid-template-columns: 0.92fr 1.08fr;
    gap: 56px;
    align-items: center;
  }
}

.page-about .about-industry__fig {
  margin: 0;
  order: 2;
}

@media (min-width: 900px) {
  .page-about .about-industry__fig {
    order: 0;
  }
}

.page-about .about-industry__media {
  aspect-ratio: 11 / 7;
  border-radius: var(--r-lg);
  overflow: hidden;
  background: linear-gradient(160deg, var(--blue-soft) 0%, var(--ice) 60%, var(--ink-soft) 150%);
  box-shadow: var(--shadow-1);
}

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

.page-about .about-industry__title {
  font-size: clamp(24px, 3.2vw, 34px);
  line-height: 1.18;
  letter-spacing: -0.02em;
  font-weight: 800;
  margin: 14px 0 16px;
}

.page-about .about-industry__copy p {
  color: var(--shale);
  max-width: 58ch;
}

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

/* ===== 结尾 CTA ===== */
.page-about .about-cta {
  padding: 70px 0 76px;
}

.page-about .about-cta__panel {
  background: var(--ink);
  color: var(--paper);
  border-radius: var(--r-lg);
  padding: 38px 26px;
  position: relative;
  overflow: hidden;
}

.page-about .about-cta__panel::before {
  content: "";
  position: absolute;
  top: -80px;
  right: -60px;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, var(--blue) 0%, transparent 68%);
  opacity: 0.5;
  pointer-events: none;
}

.page-about .about-cta__panel h2 {
  font-size: clamp(24px, 3.2vw, 34px);
  line-height: 1.18;
  letter-spacing: -0.02em;
  font-weight: 800;
  margin: 12px 0 12px;
  color: var(--white);
}

.page-about .about-cta__panel p {
  margin: 0;
  color: var(--blue-soft);
  font-size: 16px;
  max-width: 52ch;
}

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

@media (min-width: 820px) {
  .page-about .about-cta__panel {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 40px;
    align-items: center;
    padding: 54px 56px;
  }
  .page-about .about-cta__actions {
    margin-top: 0;
    justify-content: flex-end;
  }
}

/* ===== 焦点可达性 ===== */
.page-about a:focus-visible,
.page-about .about-audience__card:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
  border-radius: var(--r-sm);
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-audience__card,
  .page-about .about-team__card,
  .page-about .about-timeline__dot,
  .page-about .about-timeline__item h3 {
    transition: none;
  }
}
<<<END>>>