.page-about {
  --about-axis: 1rem;
  position: relative;
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  padding-top: clamp(1rem, 3vw, 1.75rem);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(1.5rem, 4vw, 2.5rem) 0 clamp(2.5rem, 6vw, 5rem);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -30%;
  left: -25%;
  width: 140%;
  height: 90%;
  background:
    radial-gradient(38% 46% at 22% 28%, rgba(46, 125, 209, 0.26), transparent 68%),
    radial-gradient(30% 38% at 82% 6%, rgba(255, 122, 61, 0.14), transparent 70%),
    radial-gradient(26% 30% at 60% 60%, rgba(47, 158, 110, 0.12), transparent 72%);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
}

.page-about .about-hero__title {
  font-family: var(--hh-display);
  font-weight: 900;
  font-size: clamp(2rem, 6vw, 4.2rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--hh-snow);
  margin: 0.6rem 0 1.1rem;
  text-wrap: balance;
}

.page-about .about-hero__accent {
  color: var(--hh-orange);
  position: relative;
}

.page-about .about-hero__accent::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -0.12em;
  height: 3px;
  background: linear-gradient(90deg, var(--hh-orange), rgba(255, 122, 61, 0));
  border-radius: 3px;
}

.page-about .about-hero__lead {
  max-width: 46ch;
  color: var(--hh-ink-dim);
}

.page-about .about-hero__stats {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem 2.5rem;
  margin: 1.9rem 0 0;
  padding: 1.4rem 0 0;
  border-top: 1px solid var(--hh-line);
}

.page-about .about-hero__stat {
  display: flex;
  align-items: baseline;
  gap: 0.45rem;
}

.page-about .about-hero__num {
  font-family: var(--hh-mono);
  font-size: clamp(1.5rem, 3.4vw, 2.15rem);
  font-weight: 700;
  color: var(--hh-snow);
  letter-spacing: -0.02em;
}

.page-about .about-hero__unit {
  font-size: 0.8125rem;
  color: var(--hh-ink-mute);
  letter-spacing: 0.02em;
}

.page-about .about-hero__media {
  border-radius: var(--hh-radius);
  overflow: hidden;
}

.page-about .about-hero__media .hh-media__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

@media (min-width: 960px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: end;
  }

  .page-about .about-hero__media {
    margin-top: 1rem;
  }
}

/* ---------- 起点 ---------- */
.page-about .about-origin__grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.75rem);
  margin-top: clamp(1.5rem, 4vw, 2.25rem);
}

.page-about .about-origin__text p {
  color: var(--hh-ink-dim);
  margin: 0 0 1rem;
  max-width: 62ch;
}

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

.page-about .about-origin__panel {
  padding: clamp(1.25rem, 3vw, 2rem);
}

.page-about .about-origin__kv {
  margin: 1.25rem 0 1.5rem;
}

.page-about .about-origin__kv .hh-kv__row {
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--hh-line);
}

.page-about .about-origin__kv .hh-kv__row:last-child {
  border-bottom: 0;
}

.page-about .about-origin__kv .hh-kv__v {
  font-family: var(--hh-mono);
  font-size: 0.9375rem;
  color: var(--hh-yellow);
}

.page-about .about-origin__bar {
  height: 4px;
  border-radius: 4px;
  overflow: hidden;
}

@media (min-width: 900px) {
  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-origin__panel {
    margin-top: 0.5rem;
  }
}

/* ---------- 内容板块 ---------- */
.page-about .about-pillars__grid {
  margin-top: clamp(1.5rem, 4vw, 2.5rem);
  gap: clamp(1rem, 2.5vw, 1.75rem);
}

.page-about .about-pillars__card {
  position: relative;
  padding: clamp(1.25rem, 3vw, 1.9rem);
  border-left: 3px solid var(--hh-blue);
  transition: transform 0.35s var(--hh-ease), border-color 0.35s var(--hh-ease);
}

.page-about .about-pillars__card:nth-child(2) {
  border-left-color: var(--hh-green);
}

.page-about .about-pillars__card:nth-child(3) {
  border-left-color: var(--hh-yellow);
}

.page-about .about-pillars__card:nth-child(4) {
  border-left-color: var(--hh-orange);
}

.page-about .about-pillars__card .hh-panel__index {
  font-family: var(--hh-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.16em;
  color: var(--hh-ink-mute);
}

.page-about .about-pillars__card .hh-panel__body {
  color: var(--hh-ink-dim);
  margin: 0.6rem 0 1.1rem;
}

.page-about .about-pillars__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0;
}

@media (hover: hover) {
  .page-about .about-pillars__card:hover {
    transform: translateY(-4px);
    border-left-color: var(--hh-snow);
  }
}

@media (min-width: 900px) {
  .page-about .about-pillars__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 里程碑时间轴 ---------- */
.page-about .about-milestones__grid {
  display: grid;
  gap: clamp(2rem, 5vw, 3.5rem);
  margin-top: clamp(1.5rem, 4vw, 2.5rem);
}

.page-about .about-timeline {
  list-style: none;
  position: relative;
  margin: 0;
  padding: 0 0 0 2.25rem;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: calc(1rem - 1px);
  top: 0.45rem;
  bottom: 0.45rem;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(
    to bottom,
    var(--hh-blue) 0%,
    var(--hh-green) 32%,
    var(--hh-yellow) 64%,
    var(--hh-red) 100%
  );
  opacity: 0.75;
}

.page-about .about-timeline__item {
  position: relative;
  padding-bottom: clamp(1.5rem, 4vw, 2.4rem);
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -1.25rem;
  top: 0.5rem;
  width: 0.75rem;
  height: 0.75rem;
  border-radius: 50%;
  transform: translateX(-50%);
  background: var(--hh-night);
  border: 2px solid var(--hh-blue);
  box-shadow: 0 0 0 4px rgba(11, 27, 58, 0.85);
}

.page-about .about-timeline__item:nth-child(2)::before {
  border-color: var(--hh-green);
}

.page-about .about-timeline__item:nth-child(3)::before {
  border-color: var(--hh-yellow);
}

.page-about .about-timeline__item:nth-child(4)::before {
  border-color: var(--hh-red);
}

.page-about .about-timeline__year {
  display: block;
  font-family: var(--hh-mono);
  font-size: 1.0625rem;
  letter-spacing: 0.08em;
  color: var(--hh-orange);
  margin-bottom: 0.4rem;
}

.page-about .about-timeline__title {
  font-size: clamp(1.05rem, 2.2vw, 1.3rem);
  font-weight: 700;
  color: var(--hh-snow);
  margin: 0 0 0.5rem;
  line-height: 1.35;
}

.page-about .about-timeline__text {
  color: var(--hh-ink-dim);
  margin: 0;
  max-width: 58ch;
}

.page-about .about-timeline__fold {
  margin-top: 0.85rem;
  max-width: 58ch;
}

.page-about .about-milestones__media {
  border-radius: var(--hh-radius);
  overflow: hidden;
}

.page-about .about-milestones__media .hh-media__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

@media (min-width: 900px) {
  .page-about .about-milestones__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
  }

  .page-about .about-timeline__item {
    display: grid;
    grid-template-columns: 6.5rem minmax(0, 1fr);
    gap: 1.75rem;
  }

  .page-about .about-timeline__year {
    text-align: right;
    padding-top: 0.2rem;
    margin-bottom: 0;
  }

  .page-about .about-milestones__media {
    position: sticky;
    top: 6rem;
  }
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
}

.page-about .about-team__media {
  border-radius: var(--hh-radius);
  overflow: hidden;
}

.page-about .about-team__media .hh-media__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

.page-about .about-roles {
  list-style: none;
  margin: 1.75rem 0 0;
  padding: 0;
  display: grid;
  gap: 1.25rem;
}

.page-about .about-roles__item {
  padding-top: 0.9rem;
  border-top: 2px solid var(--hh-line-strong);
}

.page-about .about-roles__item--blue {
  border-top-color: var(--hh-blue);
}

.page-about .about-roles__item--green {
  border-top-color: var(--hh-green);
}

.page-about .about-roles__item--yellow {
  border-top-color: var(--hh-yellow);
}

.page-about .about-roles__item--red {
  border-top-color: var(--hh-red);
}

.page-about .about-roles__item p {
  color: var(--hh-ink-dim);
  font-size: 0.9375rem;
  margin: 0.65rem 0 0;
}

.page-about .about-team__note {
  margin: 1.75rem 0 0;
  padding-left: 1rem;
  border-left: 2px solid var(--hh-line-strong);
  color: var(--hh-ink-mute);
  font-size: 0.9375rem;
}

@media (min-width: 700px) {
  .page-about .about-roles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.5rem;
  }
}

@media (min-width: 1080px) {
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: start;
  }

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

/* ---------- 合作生态 ---------- */
.page-about .about-partners__grid {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
  margin-top: clamp(1.5rem, 4vw, 2.25rem);
}

.page-about .about-partners__lead p {
  color: var(--hh-ink-dim);
  margin: 0 0 1rem;
  max-width: 60ch;
}

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

.page-about .about-partners__stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.25rem;
}

.page-about .about-partners__stat {
  display: grid;
  gap: 0.35rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--hh-line);
}

.page-about .about-partners__num {
  color: var(--hh-snow);
  font-weight: 700;
}

.page-about .about-partners__suffix {
  font-size: 0.55em;
  margin-left: 0.15em;
  color: var(--hh-ink-mute);
}

.page-about .about-partners__label {
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  color: var(--hh-ink-mute);
}

.page-about .about-partners__close {
  margin: clamp(1.75rem, 4vw, 2.5rem) 0 0;
  padding: clamp(1.1rem, 3vw, 1.6rem) clamp(1.1rem, 3vw, 1.75rem);
  background: var(--hh-glass);
  border-left: 3px solid var(--hh-green);
  border-radius: 0 var(--hh-radius) var(--hh-radius) 0;
  color: var(--hh-ink-dim);
  max-width: 74ch;
}

@media (min-width: 900px) {
  .page-about .about-partners__grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    align-items: start;
  }

  .page-about .about-partners__stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.5rem;
  }

  .page-about .about-partners__stat {
    border-bottom: 0;
    border-top: 2px solid var(--hh-line-strong);
    padding-top: 0.9rem;
    padding-bottom: 0;
  }

  .page-about .about-partners__stat:nth-child(1) {
    border-top-color: var(--hh-blue);
  }

  .page-about .about-partners__stat:nth-child(2) {
    border-top-color: var(--hh-yellow);
  }

  .page-about .about-partners__stat:nth-child(3) {
    border-top-color: var(--hh-orange);
  }
}

/* ---------- 联系与访问 ---------- */
.page-about .about-contact__grid {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2rem);
  margin-top: clamp(1.5rem, 4vw, 2.25rem);
}

.page-about .about-contact__card {
  padding: clamp(1.25rem, 3vw, 2rem);
  color: var(--hh-night);
}

.page-about .about-contact__card .hh-panel__title {
  color: var(--hh-night);
}

.page-about .about-contact__list {
  list-style: none;
  margin: 1.25rem 0 0;
  padding: 0;
}

.page-about .about-contact__list .hh-contact-list__item {
  display: grid;
  gap: 0.25rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid rgba(11, 27, 58, 0.14);
}

.page-about .about-contact__list .hh-contact-list__item:last-child {
  border-bottom: 0;
}

.page-about .about-contact__list .hh-contact-list__key {
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: rgba(11, 27, 58, 0.55);
}

.page-about .about-contact__list .hh-contact-list__val {
  font-family: var(--hh-mono);
  font-size: 0.9375rem;
  color: var(--hh-night);
  word-break: break-word;
}

.page-about .about-contact__list .hh-contact-list__val a {
  color: var(--hh-blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(46, 125, 209, 0.4);
}

.page-about .about-contact__note {
  margin: 1.25rem 0 0;
  font-size: 0.8125rem;
  line-height: 1.6;
  color: rgba(11, 27, 58, 0.65);
}

.page-about .about-contact__aside {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(1.25rem, 3vw, 2rem);
  background: var(--hh-glass);
  border-radius: var(--hh-radius);
}

.page-about .about-contact__prompt {
  margin: 0 0 1.1rem;
  color: var(--hh-snow);
  font-size: clamp(1.05rem, 2.2vw, 1.25rem);
  font-weight: 700;
}

.page-about .about-contact__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.1rem;
}

@media (min-width: 860px) {
  .page-about .about-contact__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: stretch;
  }
}

/* ---------- 动效与无障碍 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-pillars__card {
    transition: none;
  }

  @media (hover: hover) {
    .page-about .about-pillars__card:hover {
      transform: none;
    }
  }
}
</main>