.page-about {
  --about-hair: rgba(255, 255, 255, 0.12);
  --about-hair-strong: rgba(255, 255, 255, 0.24);
}

.page-about img {
  max-width: 100%;
  height: auto;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-block: clamp(32px, 6vw, 72px) clamp(40px, 7vw, 88px);
  background:
    radial-gradient(120% 90% at 88% 8%, rgba(20, 224, 208, 0.09), transparent 58%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-soft) 100%);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-about .about-hero__grid {
  margin-top: clamp(24px, 4vw, 48px);
  display: grid;
  gap: clamp(28px, 5vw, 56px);
  align-items: end;
}

.page-about .about-hero__title {
  margin: 12px 0 0;
  font-weight: 250;
  line-height: 1.06;
  letter-spacing: -0.04em;
}

.page-about .about-hero__lede {
  margin-top: 22px;
  max-width: 60ch;
}

.page-about .about-hero__stats {
  margin-top: clamp(28px, 4vw, 44px);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-stat {
  background: var(--bg-soft);
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-stat__value {
  font-size: clamp(1.4rem, 3.6vw, 2rem);
  font-weight: 500;
  color: var(--cyan-300);
  letter-spacing: -0.02em;
}

.page-about .about-stat__plus {
  font-size: 0.6em;
  color: var(--cyan-500);
}

.page-about .about-stat__label {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-dim);
}

.page-about .about-hero__media {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--glass);
  box-shadow: var(--shadow-soft);
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-hero__media .coord {
  display: block;
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  color: var(--ink-dim);
}

/* ---------- 品牌起点 ---------- */
.page-about .about-origin__grid {
  align-items: start;
  gap: clamp(24px, 4vw, 56px);
}

.page-about .about-origin__title {
  margin: 12px 0 0;
  font-size: clamp(1.9rem, 4.2vw, 3.1rem);
  font-weight: 300;
  line-height: 1.16;
  letter-spacing: -0.03em;
}

.page-about .about-origin__body p + p {
  margin-top: 1.1em;
}

.page-about .about-origin__body p:first-child::first-letter {
  font-size: 2.6em;
  line-height: 1;
  font-weight: 300;
  color: var(--cyan-500);
  float: left;
  margin: 0.06em 0.14em 0 0;
}

/* ---------- 服务对象 ---------- */
.page-about .about-audience__head {
  max-width: 76ch;
}

.page-about .about-audience__head .section-title {
  margin-top: 12px;
}

.page-about .about-audience__intro {
  margin-top: 18px;
}

.page-about .about-audience__grid {
  margin-top: clamp(30px, 5vw, 52px);
  display: grid;
  gap: 16px;
  grid-template-columns: 1fr;
}

.page-about .about-role {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 22px 20px;
  position: relative;
  overflow: hidden;
}

.page-about .about-role::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan-500), transparent 82%);
  opacity: 0.75;
}

.page-about .about-role__num {
  color: var(--cyan-500);
  font-size: 12px;
  letter-spacing: 0.22em;
}

.page-about .about-role__text {
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-about .about-audience__note {
  margin: 26px 0 0;
  padding-left: 14px;
  border-left: 1px solid var(--about-hair-strong);
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-dim);
  max-width: 72ch;
}

.page-about .about-audience__note a {
  color: var(--cyan-300);
  border-bottom: 1px solid rgba(125, 243, 234, 0.4);
}

/* ---------- 发展历程 ---------- */
.page-about .about-timeline {
  background: linear-gradient(180deg, var(--bg-soft) 0%, var(--bg) 100%);
  border-block: 1px solid var(--line);
}

.page-about .about-timeline__head {
  max-width: 60ch;
}

.page-about .about-timeline__head .section-title {
  margin-top: 12px;
}

.page-about .about-timeline__layout {
  margin-top: clamp(30px, 5vw, 54px);
  display: grid;
  gap: 24px;
}

.page-about .about-years {
  border: 1px solid var(--about-hair);
  background: rgba(11, 18, 38, 0.6);
  padding: 16px 18px;
}

.page-about .about-years__label {
  margin: 0 0 12px;
  color: var(--ink-dim);
  letter-spacing: 0.24em;
}

.page-about .about-years__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
}

.page-about .about-years__link {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: color 0.24s var(--ease), border-color 0.24s var(--ease);
}

.page-about .about-years__link:hover,
.page-about .about-years__link:focus-visible {
  color: var(--cyan-500);
  border-color: var(--cyan-500);
}

.page-about .about-timeline__list {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
  display: grid;
  gap: 2px;
}

.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan-500), rgba(20, 224, 208, 0.08));
}

.page-about .about-milestone {
  position: relative;
  display: grid;
  gap: 6px;
  padding: 18px 0 18px 28px;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-milestone:last-child {
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-milestone::before {
  content: "";
  position: absolute;
  left: 0;
  top: 26px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--bg);
  border: 1px solid var(--cyan-500);
  box-shadow: 0 0 0 4px rgba(20, 224, 208, 0.08);
  transition: background 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.page-about .about-milestone:hover::before {
  background: var(--cyan-500);
  box-shadow: 0 0 0 6px rgba(20, 224, 208, 0.14);
}

.page-about .about-milestone__year {
  color: var(--cyan-300);
  font-size: 13px;
  letter-spacing: 0.16em;
}

.page-about .about-milestone__title {
  margin: 0;
  font-size: clamp(1.1rem, 2.6vw, 1.45rem);
  font-weight: 500;
  letter-spacing: -0.01em;
}

.page-about .about-milestone__body p {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
  max-width: 66ch;
}

.page-about .about-timeline__figure {
  margin: clamp(28px, 4vw, 46px) 0 0;
  border: 1px solid var(--line);
}

.page-about .about-timeline__figure img {
  display: block;
  width: 100%;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

.page-about .about-timeline__figure .coord {
  display: block;
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  color: var(--ink-dim);
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  align-items: center;
  gap: clamp(24px, 4vw, 52px);
}

.page-about .about-team__intro .section-title {
  margin: 12px 0 18px;
}

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

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-team__cards {
  margin-top: clamp(30px, 5vw, 52px);
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-team-card {
  background: var(--mist-100);
  padding: 22px 22px 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: background 0.26s var(--ease);
}

.page-about .about-team-card:hover {
  background: var(--white);
}

.page-about .about-team-card__role {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--cyan-500);
}

.page-about .about-team-card__name {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.page-about .about-team-card__count {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--blue-700);
}

.page-about .about-team-card__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: rgba(11, 18, 38, 0.68);
}

.page-about .about-cadence {
  margin-top: clamp(28px, 4vw, 44px);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.page-about .about-cadence__item {
  border-top: 1px solid rgba(11, 18, 38, 0.16);
  padding-top: 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-cadence__num {
  font-size: clamp(1.25rem, 3vw, 1.7rem);
  font-weight: 500;
  color: var(--blue-900);
}

.page-about .about-cadence__text {
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: rgba(11, 18, 38, 0.58);
}

/* ---------- 覆盖与生态 ---------- */
.page-about .about-ecosystem__head {
  max-width: 74ch;
}

.page-about .about-ecosystem__intro {
  margin-top: 18px;
}

.page-about .about-eco__grid {
  margin-top: clamp(30px, 5vw, 54px);
  display: grid;
  gap: 22px;
}

.page-about .about-coverage {
  border: 1px solid var(--about-hair);
  background: linear-gradient(160deg, rgba(20, 224, 208, 0.06), rgba(6, 11, 24, 0.5) 55%);
  padding: 20px;
}

.page-about .about-coverage__label {
  margin: 0 0 14px;
  letter-spacing: 0.24em;
  color: var(--ink-dim);
}

.page-about .about-coverage__svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-coverage__node {
  fill: rgba(125, 243, 234, 0.85);
  transition: fill 0.24s var(--ease);
}

.page-about .about-coverage__node:hover {
  fill: var(--orange-500);
}

.page-about .about-coverage__node--hub {
  fill: var(--cyan-500);
}

.page-about .about-coverage__legend {
  margin-top: 16px;
}

.page-about .about-partners {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-partner {
  background: var(--bg-soft);
  padding: 20px 20px 22px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: background 0.26s var(--ease);
}

.page-about .about-partner:hover {
  background: var(--panel);
}

.page-about .about-partner__title {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.page-about .about-partner__num {
  margin: 0;
  font-size: clamp(1.2rem, 3vw, 1.6rem);
  font-weight: 500;
  color: var(--cyan-300);
}

.page-about .about-partner__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--ink-soft);
}

/* ---------- 尾段 ---------- */
.page-about .about-cta__panel {
  border: 1px solid var(--line-strong);
  background:
    radial-gradient(90% 120% at 12% 0%, rgba(255, 138, 61, 0.12), transparent 62%),
    linear-gradient(140deg, rgba(20, 224, 208, 0.08), var(--bg-soft) 60%);
  padding: clamp(26px, 5vw, 48px);
  display: grid;
  gap: 24px;
}

.page-about .about-cta__title {
  margin: 10px 0 0;
  font-size: clamp(1.6rem, 3.6vw, 2.4rem);
  font-weight: 300;
  letter-spacing: -0.03em;
  line-height: 1.2;
}

.page-about .about-cta__text {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--ink-soft);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

  .page-about .about-cadence {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }

  .page-about .about-timeline__layout {
    grid-template-columns: 180px minmax(0, 1fr);
    gap: clamp(24px, 4vw, 52px);
    align-items: start;
  }

  .page-about .about-years {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }

  .page-about .about-years__list {
    flex-direction: column;
    gap: 10px;
  }

  .page-about .about-milestone {
    grid-template-columns: 92px minmax(0, 1fr);
    align-items: start;
    padding-left: 30px;
  }

  .page-about .about-milestone__year {
    padding-top: 4px;
  }

  .page-about .about-eco__grid {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    align-items: start;
  }

  .page-about .about-cta__panel {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    align-items: center;
  }

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

@media (min-width: 1200px) {
  .page-about .about-audience__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-hero__media {
    margin-left: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-role,
  .page-about .about-team-card,
  .page-about .about-partner,
  .page-about .about-milestone::before,
  .page-about .about-coverage__node,
  .page-about .about-years__link {
    transition: none;
  }
}