.page-about {
  --about-line: rgba(11, 42, 74, 0.14);
  --about-line-strong: rgba(11, 42, 74, 0.28);
  --about-soft: rgba(11, 42, 74, 0.055);
  background: var(--paper);
  color: var(--ink);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: clamp(18px, 3vw, 40px);
}

.page-about .about-hero__title {
  margin: 16px 0 0;
  max-width: 14em;
  font-size: clamp(34px, 7.1vw, 90px);
  font-weight: 200;
  line-height: 1.04;
  letter-spacing: -0.025em;
  color: var(--ink);
}

.page-about .about-hero__mark {
  position: relative;
  display: inline-block;
  font-weight: 800;
  color: var(--navy);
  white-space: nowrap;
}

.page-about .about-hero__mark::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0.04em;
  height: 0.1em;
  border-radius: var(--pill);
  background: var(--orange);
  opacity: 0.6;
}

.page-about .about-hero__lede {
  margin-top: clamp(18px, 2.4vw, 28px);
  max-width: 40em;
  font-size: clamp(16px, 1.55vw, 19px);
  color: var(--ink);
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px 18px;
  margin: clamp(26px, 4vw, 46px) 0 0;
  padding: 20px 0 0;
  list-style: none;
  border-top: 1px solid var(--about-line);
  max-width: 680px;
}

.page-about .about-fact__num {
  display: block;
  font-size: clamp(24px, 3.4vw, 38px);
  font-weight: 500;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--navy);
}

.page-about .about-fact__label {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--slate);
}

.page-about .about-hero__figure {
  margin: clamp(30px, 5vw, 66px) 0 0;
  border-radius: var(--r-xl);
  overflow: hidden;
  background: linear-gradient(135deg, var(--navy) 0%, var(--midnight) 100%);
}

.page-about .about-hero__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 7 / 4;
  object-fit: cover;
}

/* ---------- 业务定位 ---------- */
.page-about .about-declare__grid {
  display: grid;
  gap: 14px;
}

.page-about .about-declare__side {
  color: var(--slate);
}

.page-about .about-declare__title {
  margin: 0 0 clamp(16px, 2vw, 24px);
  max-width: 18em;
  font-size: clamp(27px, 3.6vw, 46px);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--navy);
}

.page-about .about-declare__p {
  max-width: 40em;
  margin-top: 1em;
  font-size: clamp(15.5px, 1.35vw, 17.5px);
  line-height: 1.78;
  color: var(--ink);
}

.page-about .about-declare__p + .about-declare__p {
  margin-top: 0.9em;
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline .section__title {
  max-width: 18em;
  font-weight: 300;
  letter-spacing: -0.02em;
}

.page-about .tl {
  position: relative;
  margin-top: clamp(30px, 4vw, 56px);
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--orange) 0%, var(--lime) 100%);
}

.page-about .tl__item {
  position: relative;
  padding: 0 0 40px 34px;
}

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

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--mist);
  border: 3px solid var(--navy);
}

.page-about .tl__year {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 8px;
}

.page-about .tl__num {
  font-size: clamp(26px, 4.4vw, 42px);
  font-weight: 300;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--navy);
}

.page-about .tl__season {
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--slate);
}

.page-about .tl__body p {
  max-width: 38em;
  font-size: clamp(15px, 1.3vw, 17px);
  line-height: 1.78;
  color: var(--ink);
}

/* ---------- 内容分类 ---------- */
.page-about .about-cats .section__title {
  max-width: 20em;
  font-weight: 700;
}

.page-about .about-cats__lede {
  max-width: 38em;
  margin-top: 14px;
}

.page-about .cats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: clamp(28px, 4vw, 48px);
}

.page-about .cat {
  position: relative;
  padding: 26px 24px 28px;
  border-radius: var(--r-lg);
  background: var(--mist);
  border: 1px solid transparent;
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .cat:hover {
  transform: translateY(-4px);
  border-color: var(--about-line-strong);
}

.page-about .cat__idx {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--slate);
}

.page-about .cat__title {
  margin: 12px 0 8px;
  font-size: clamp(20px, 2.2vw, 26px);
  font-weight: 800;
  letter-spacing: -0.015em;
  color: var(--navy);
}

.page-about .cat__text {
  max-width: 34em;
  font-size: 15px;
  line-height: 1.72;
  color: var(--ink);
}

.page-about .cat--accent {
  background: var(--navy);
}

.page-about .cat--accent .cat__idx {
  color: var(--lime);
}

.page-about .cat--accent .cat__title,
.page-about .cat--accent .cat__text {
  color: var(--white);
}

.page-about .cat--lime {
  background: var(--paper);
  border-color: var(--lime);
  box-shadow: inset 0 0 0 3px rgba(184, 255, 61, 0.5);
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: clamp(28px, 4vw, 56px);
}

.page-about .about-team .section__title {
  max-width: 16em;
  font-weight: 800;
  margin-bottom: 16px;
}

.page-about .about-team__p {
  max-width: 36em;
  font-size: clamp(15.5px, 1.35vw, 17.5px);
  line-height: 1.78;
  color: var(--ink);
}

.page-about .roles {
  margin-top: clamp(22px, 3vw, 34px);
  list-style: none;
  display: grid;
  gap: 2px;
  border-top: 1px solid var(--about-line);
}

.page-about .role {
  display: grid;
  gap: 4px;
  padding: 16px 0;
  border-bottom: 1px solid var(--about-line);
}

.page-about .role__name {
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--orange);
}

.page-about .role__desc {
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
}

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

.page-about .about-team__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
  border-radius: var(--r-lg);
  background: linear-gradient(160deg, var(--mist), var(--navy));
}

.page-about .about-team__cap {
  margin-top: 12px;
  font-size: 12.5px;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--slate);
}

/* ---------- 资质 ---------- */
.page-about .about-cred__panel {
  position: relative;
  padding: clamp(28px, 4.4vw, 60px);
  border-radius: var(--r-xl);
  background: linear-gradient(150deg, var(--navy) 0%, var(--midnight) 72%);
  color: var(--white);
  overflow: hidden;
}

.page-about .eyebrow--on-dark {
  color: var(--lime);
}

.page-about .about-cred__title {
  margin: 14px 0 0;
  max-width: 16em;
  font-size: clamp(26px, 3.6vw, 46px);
  font-weight: 300;
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-about .about-cred__intro {
  margin-top: 16px;
  max-width: 38em;
  font-size: clamp(15px, 1.3vw, 17px);
  line-height: 1.78;
  color: rgba(255, 255, 255, 0.82);
}

.page-about .about-cred__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: clamp(26px, 3.6vw, 42px);
}

.page-about .cred {
  padding: 18px 20px;
  border-radius: var(--r-md);
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.14);
}

.page-about .cred__label {
  display: block;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: rgba(255, 255, 255, 0.62);
}

.page-about .cred__value {
  display: block;
  margin-top: 8px;
  font-size: clamp(17px, 1.9vw, 22px);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--lime);
  word-break: break-word;
}

.page-about .about-cred__figure {
  margin: clamp(26px, 3.6vw, 42px) 0 0;
}

.page-about .about-cred__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: var(--r-lg);
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco .section__title {
  max-width: 18em;
  font-weight: 300;
  letter-spacing: -0.02em;
}

.page-about .about-eco__lede {
  max-width: 38em;
  margin-top: 14px;
}

.page-about .eco-grid {
  margin-top: clamp(26px, 3.6vw, 44px);
}

.page-about .eco-card {
  position: relative;
  padding: 26px 24px 28px;
  border-radius: var(--r-lg);
  background: var(--white);
  border: 1px solid var(--about-line);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .eco-card:hover,
.page-about .eco-card:focus-within {
  transform: translateY(-5px);
  border-color: var(--orange);
  box-shadow: 0 18px 40px -28px rgba(11, 42, 74, 0.55);
}

.page-about .eco-card__count {
  display: inline-block;
  font-size: clamp(30px, 3.8vw, 44px);
  font-weight: 500;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--orange);
}

.page-about .eco-card__title {
  margin: 14px 0 8px;
  font-size: clamp(18px, 1.9vw, 22px);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--navy);
}

.page-about .eco-card__text {
  max-width: 32em;
  font-size: 15px;
  line-height: 1.74;
  color: var(--ink);
}

.page-about .about-eco__cta {
  display: grid;
  gap: 16px;
  margin-top: clamp(28px, 3.6vw, 44px);
  padding: clamp(22px, 3vw, 32px);
  border-radius: var(--r-lg);
  background: var(--soft, var(--mist));
  border-left: 5px solid var(--orange);
}

.page-about .about-eco__cta-text {
  max-width: 34em;
  font-size: clamp(15.5px, 1.4vw, 18px);
  line-height: 1.7;
  color: var(--navy);
  font-weight: 600;
}

.page-about .about-eco__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 下一步 ---------- */
.page-about .about-next__title {
  margin: 14px 0 clamp(22px, 3vw, 34px);
  max-width: 18em;
  font-size: clamp(26px, 3.8vw, 48px);
  font-weight: 200;
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-about .about-next__links {
  display: grid;
  gap: 12px;
}

.page-about .next-link {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 22px;
  border-radius: var(--r-lg);
  background: var(--mist);
  text-decoration: none;
  color: var(--navy);
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .next-link:hover {
  transform: translateX(6px);
  background: var(--navy);
  color: var(--white);
}

.page-about .next-link__k {
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--orange);
}

.page-about .next-link__t {
  font-size: clamp(16px, 1.7vw, 20px);
  font-weight: 700;
}

/* ---------- 桌面增强 ---------- */
@media (min-width: 760px) {
  .page-about .cats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .about-cred__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

  .page-about .about-eco__cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }

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

@media (min-width: 900px) {
  .page-about .about-declare__grid {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }

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

  .page-about .tl__item {
    display: grid;
    grid-template-columns: 180px minmax(0, 1fr);
    column-gap: 40px;
    padding: 0 0 46px 42px;
  }

  .page-about .tl__item::before {
    top: 10px;
  }

  .page-about .tl__year {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    margin-bottom: 0;
  }

  .page-about .roles .role {
    grid-template-columns: 120px minmax(0, 1fr);
    gap: 20px;
    align-items: baseline;
  }
}

@media (min-width: 1080px) {
  .page-about .cats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .cat--wide {
    grid-column: span 2;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .cat,
  .page-about .eco-card,
  .page-about .next-link {
    transition: none;
  }

  .page-about .cat:hover,
  .page-about .eco-card:hover,
  .page-about .next-link:hover {
    transform: none;
  }
}
</main>

.page-about {
  --soft: transparent;
}