.page-about {
  --about-line: rgba(58, 63, 69, 0.14);
  --about-gap: clamp(44px, 6.5vw, 92px);
  background: var(--hp-mist);
  color: var(--hp-ink);
  font-family: var(--hp-font-sans);
  font-size: 16px;
  line-height: 1.75;
  overflow-x: hidden;
}

.page-about *,
.page-about *::before,
.page-about *::after {
  box-sizing: border-box;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  padding: calc(var(--hp-header-h) + 44px) 0 clamp(40px, 6vw, 76px);
  background:
    radial-gradient(120% 78% at 90% 4%, rgba(127, 191, 212, 0.3) 0%, rgba(127, 191, 212, 0) 62%),
    linear-gradient(180deg, var(--hp-mist) 0%, rgba(231, 227, 218, 0.6) 100%);
}

.page-about .about-hero__inner {
  display: grid;
  gap: 32px;
}

.page-about .about-hero .hp-breadcrumb {
  margin-bottom: 20px;
}

.page-about .hp-eyebrow {
  margin: 0 0 16px;
}

.page-about .about-hero__title {
  margin: 0;
  font-size: clamp(33px, 6.2vw, 62px);
  line-height: 1.16;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--hp-blue-deep);
}

.page-about .about-hero__title span {
  background: linear-gradient(180deg, transparent 64%, rgba(232, 179, 60, 0.52) 64%);
}

.page-about .about-hero__lead {
  margin: 22px 0 0;
  max-width: 36em;
  font-size: clamp(16px, 1.6vw, 18px);
  color: var(--hp-ink);
}

.page-about .about-hero__aside {
  display: grid;
  gap: 18px;
  border-top: 2px solid var(--hp-blue);
  padding-top: 18px;
}

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

.page-about .about-hero__stats {
  margin: 0;
  display: grid;
  gap: 11px;
}

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

.page-about .about-hero__stat dt {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--hp-moss);
}

.page-about .about-hero__stat dd {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
  color: var(--hp-blue-deep);
  text-align: right;
}

/* ---------- 区块骨架 ---------- */

.page-about .about-sec {
  padding: var(--about-gap) 0;
  border-top: 1px solid var(--about-line);
}

.page-about .about-sec__head {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(26px, 4vw, 48px);
}

.page-about .about-sec__no {
  margin: 0;
  font-size: clamp(30px, 5vw, 46px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--hp-blue-light);
}

.page-about .about-sec__title {
  margin: 0;
  font-size: clamp(24px, 3.4vw, 36px);
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--hp-blue-deep);
}

.page-about .about-sec__desc {
  margin: 12px 0 0;
  max-width: 34em;
  font-size: 15.5px;
  color: rgba(58, 63, 69, 0.74);
}

/* ---------- 01 我们做什么 ---------- */

.page-about .about-what__body {
  max-width: 40em;
  margin-bottom: clamp(26px, 4vw, 44px);
}

.page-about .about-what__lead {
  margin: 0 0 14px;
  font-size: clamp(16px, 1.5vw, 17.5px);
}

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

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

.page-about .about-audience__item {
  position: relative;
  padding: 22px 0 22px 20px;
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-audience__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 26px;
  width: 2px;
  height: 22px;
  background: var(--hp-moss);
}

.page-about .about-audience__item h3 {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 700;
  color: var(--hp-blue-deep);
}

.page-about .about-audience__item p {
  margin: 0;
  font-size: 15.5px;
  color: rgba(58, 63, 69, 0.86);
}

/* ---------- 02 版本走过的路 ---------- */

.page-about .about-versions__body {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
}

.page-about .about-timeline {
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scroll-snap-type: x proximity;
  padding-bottom: 16px;
}

.page-about .about-timeline:focus-visible {
  outline: 2px solid var(--hp-blue);
  outline-offset: 6px;
}

.page-about .about-timeline__list {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  min-width: max-content;
}

.page-about .about-timeline__item {
  position: relative;
  flex: 0 0 auto;
  width: min(74vw, 300px);
  padding: 0 28px 0 24px;
  border-left: 1px solid var(--about-line);
  scroll-snap-align: start;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 14px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  border: 2px solid var(--hp-blue-light);
  background: var(--hp-paper);
}

.page-about .about-timeline__item.is-current::before {
  border-color: var(--hp-yellow);
  background: var(--hp-yellow);
}

.page-about .about-timeline__ver {
  margin: 0;
  font-size: clamp(30px, 5vw, 44px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--hp-blue);
}

.page-about .about-timeline__item.is-current .about-timeline__ver {
  color: var(--hp-blue-deep);
}

.page-about .about-timeline__name {
  margin: 14px 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--hp-ink);
}

.page-about .about-timeline__text {
  margin: 0;
  font-size: 15px;
  color: rgba(58, 63, 69, 0.82);
}

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

.page-about .about-rhythm {
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding-top: 20px;
  border-top: 1px solid var(--about-line);
}

.page-about .about-rhythm svg {
  display: block;
  width: 100%;
  max-width: 640px;
  height: auto;
}

.page-about .about-rhythm figcaption {
  margin-top: 10px;
}

/* ---------- 03 团队与分工 ---------- */

.page-about .about-team__media {
  margin: 0 0 clamp(26px, 4vw, 44px);
}

.page-about .about-team__grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(18px, 2.5vw, 28px);
}

.page-about .about-role {
  padding: clamp(20px, 3vw, 28px);
}

.page-about .about-role__no {
  margin: 0 0 10px;
  font-size: clamp(28px, 4vw, 38px);
  line-height: 1;
  color: var(--hp-blue);
  letter-spacing: -0.02em;
}

.page-about .about-role .hp-card__title {
  color: var(--hp-blue-deep);
}

.page-about .about-role p {
  margin: 10px 0 0;
  font-size: 15px;
  color: rgba(58, 63, 69, 0.86);
}

/* ---------- 04 服务能力与覆盖 ---------- */

.page-about .about-coverage__body {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
}

.page-about .about-metrics {
  margin: 0;
  border-top: 1px solid var(--about-line);
}

.page-about .about-metrics__row {
  display: grid;
  gap: 4px;
  padding: 18px 0;
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-metrics__row dt {
  font-size: 13.5px;
  letter-spacing: 0.08em;
  color: var(--hp-moss);
}

.page-about .about-metrics__row dd {
  margin: 0;
  font-size: 15.5px;
  color: rgba(58, 63, 69, 0.88);
}

.page-about .about-metrics__row .hp-mono {
  font-size: 19px;
  color: var(--hp-blue);
  margin-right: 2px;
}

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

/* ---------- 05 技术适配与合作生态 ---------- */

.page-about .about-eco__body {
  display: grid;
  gap: clamp(22px, 3vw, 40px);
}

.page-about .about-eco__lead {
  margin: 0;
  max-width: 34em;
  font-size: clamp(16px, 1.5vw, 17.5px);
}

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

.page-about .about-eco__list li {
  position: relative;
  padding-left: 22px;
  font-size: 15.5px;
  color: rgba(58, 63, 69, 0.86);
}

.page-about .about-eco__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 12px;
  height: 1px;
  background: var(--hp-yellow);
}

/* ---------- 结尾 ---------- */

.page-about .about-next {
  padding: clamp(46px, 7vw, 92px) 0;
  background: linear-gradient(158deg, var(--hp-blue-deep) 0%, #0b5a72 100%);
  color: var(--hp-mist);
}

.page-about .about-next__grid {
  display: grid;
  gap: clamp(26px, 4vw, 56px);
}

.page-about .about-next h2 {
  margin: 0 0 14px;
  font-size: clamp(24px, 3.4vw, 36px);
  line-height: 1.2;
  font-weight: 800;
  color: #ffffff;
}

.page-about .about-next p {
  margin: 0;
  max-width: 34em;
  color: var(--hp-on-deep);
}

.page-about .about-next__note {
  margin-top: 16px !important;
  font-size: 14.5px;
}

.page-about .about-next__note a {
  color: var(--hp-yellow);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

.page-about .about-next .hp-btn--ghost {
  border-color: rgba(245, 244, 240, 0.42);
  color: var(--hp-mist);
}

/* ---------- 平板与桌面 ---------- */

@media (min-width: 640px) {
  .page-about .about-metrics__row {
    grid-template-columns: 180px minmax(0, 1fr);
    gap: 20px;
    align-items: baseline;
  }
}

@media (min-width: 860px) {
  .page-about .about-sec__head {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: clamp(20px, 4vw, 56px);
    align-items: start;
  }

  .page-about .about-audience {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    column-gap: clamp(24px, 3.5vw, 52px);
  }

  .page-about .about-audience__item {
    border-bottom: none;
    padding-bottom: 4px;
  }

  .page-about .about-audience {
    padding-bottom: 22px;
    border-bottom: 1px solid var(--about-line);
  }

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

  .page-about .about-eco__body {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: clamp(32px, 5vw, 72px);
    align-items: end;
  }

  .page-about .about-hero__aside {
    border-top: none;
    border-left: 2px solid var(--hp-blue);
    padding-top: 0;
    padding-left: 24px;
  }

  .page-about .about-next__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: center;
  }

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

@media (min-width: 1024px) {
  .page-about .about-versions__body {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: start;
  }

  .page-about .about-coverage__body {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
    align-items: center;
  }
}

@media (min-width: 1100px) {
  .page-about .about-hero__aside {
    display: flex;
    gap: 22px;
    align-items: stretch;
  }

  .page-about .about-hero__vert {
    display: block;
    margin: 0;
    writing-mode: vertical-rl;
    text-orientation: upright;
    letter-spacing: 0.3em;
    font-size: 12.5px;
    line-height: 1;
    color: var(--hp-moss);
  }

  .page-about .about-hero__stats {
    flex: 1 1 auto;
    min-width: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-timeline {
    scroll-behavior: auto;
  }
}
</