/* ===== 关于我们 · 页面专属样式（作用域 .page-about） ===== */

.page-about {
  --about-rail: 148px;
  --about-gap: clamp(20px, 3vw, 42px);
  background: var(--c-deep);
  color: var(--ink-1);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 4.5vw, 52px) 0 clamp(54px, 7.5vw, 98px);
  background:
    radial-gradient(120% 92% at 86% -6%, rgba(20, 80, 122, 0.9) 0%, rgba(11, 42, 69, 0) 62%),
    linear-gradient(158deg, #0B2A45 0%, #071B2E 100%);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: -20%;
  right: -14%;
  width: clamp(260px, 46vw, 620px);
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  background: repeating-conic-gradient(
    from 0deg,
    rgba(62, 140, 181, 0.26) 0deg 1deg,
    transparent 1deg 15deg
  );
  -webkit-mask-image: radial-gradient(circle, transparent 51%, #000 52%, #000 71%, transparent 72%);
  mask-image: radial-gradient(circle, transparent 51%, #000 52%, #000 71%, transparent 72%);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: clamp(14px, 2vw, 22px);
  max-width: 1000px;
}

.page-about .about-hero__title {
  margin: 0;
  font-size: clamp(34px, 7.2vw, 96px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--c-cream);
  text-wrap: balance;
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 60ch;
  color: var(--ink-2);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: clamp(12px, 2vw, 22px) 0 0;
  padding: 0;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-card);
  overflow: hidden;
}

.page-about .about-hero__stats > div {
  padding: 16px 20px;
  background: rgba(11, 42, 69, 0.74);
}

.page-about .about-hero__stats dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--ink-3);
}

.page-about .about-hero__stats dd {
  margin: 8px 0 0;
  display: flex;
  align-items: baseline;
  gap: 6px;
  font-size: 17px;
  font-weight: 700;
  color: var(--c-cream);
}

.page-about .about-hero__stats dd .mono {
  font-size: 26px;
  font-weight: 700;
  color: var(--c-gold);
  letter-spacing: -0.01em;
}

/* ---------- 起点叙事 ---------- */
.page-about .about-origin {
  padding-top: clamp(44px, 6.5vw, 88px);
  padding-bottom: clamp(44px, 6.5vw, 88px);
}

.page-about .about-era {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
}

.page-about .about-era__year {
  margin: 0;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 20px;
  letter-spacing: 0.14em;
  color: var(--c-gold);
}

.page-about .about-era__year::before {
  content: "";
  flex: none;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--c-gold);
  box-shadow: 0 0 0 5px rgba(232, 179, 60, 0.16);
}

.page-about .about-era__body p {
  margin: 0 0 1.15em;
  max-width: 66ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-2);
}

.page-about .about-origin__list {
  list-style: none;
  margin: clamp(18px, 2.6vw, 28px) 0 0;
  padding: 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-origin__list li {
  display: flex;
  gap: 16px;
  align-items: baseline;
  padding: 15px 2px;
  border-bottom: 1px solid var(--line-soft);
  font-size: 16px;
  line-height: 1.7;
  color: var(--ink-1);
}

.page-about .about-origin__list .mono {
  flex: none;
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--c-cyan);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding: clamp(48px, 7vw, 94px) 0;
  background: linear-gradient(180deg, rgba(7, 27, 46, 0.94) 0%, rgba(11, 42, 69, 0.94) 100%);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-team__head {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.6vw, 46px);
  align-items: center;
  margin-bottom: clamp(30px, 4.6vw, 54px);
}

.page-about .about-team__intro .lede {
  margin: 0;
  max-width: 56ch;
  color: var(--ink-2);
}

.page-about .about-team__figure,
.page-about .about-reach__figure,
.page-about .about-timeline__figure {
  margin: 0;
  overflow: hidden;
  border: 2px solid var(--line-hard);
  border-radius: var(--radius-card);
}

.page-about .about-team__figure img,
.page-about .about-reach__figure img,
.page-about .about-timeline__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-about .about-team__cards {
  gap: clamp(16px, 2.2vw, 26px);
}

.page-about .about-team__card {
  display: flex;
  flex-direction: column;
  padding: clamp(20px, 2.8vw, 28px);
  background: rgba(20, 80, 122, 0.40);
  transition: transform var(--dur) var(--ease-out), border-color var(--dur) var(--ease-out);
}

.page-about .about-team__card:hover {
  transform: translateY(-4px);
  border-color: var(--c-cyan);
}

.page-about .about-team__card h3 {
  margin: 14px 0 12px;
  font-size: clamp(19px, 2.2vw, 24px);
  font-weight: 700;
  line-height: 1.35;
  transform: skewX(-2deg);
  color: var(--c-cream);
}

.page-about .about-team__card > p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-2);
}

.page-about .about-team__meta {
  margin: auto 0 0;
}

/* ---------- 服务覆盖 ---------- */
.page-about .about-reach {
  padding: clamp(50px, 7.5vw, 100px) 0;
  background:
    radial-gradient(90% 70% at 12% 6%, rgba(20, 80, 122, 0.72) 0%, rgba(7, 27, 46, 0) 66%),
    var(--c-night);
}

.page-about .about-reach__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 52px);
  align-items: center;
}

.page-about .about-reach__body > p {
  margin: 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-2);
}

.page-about .about-reach__scale {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px 24px;
  margin: clamp(22px, 3.2vw, 34px) 0 0;
  padding: 0;
}

.page-about .about-reach__item {
  padding: 16px 0 2px;
  border-top: 3px solid var(--c-gold);
  transition: transform 420ms var(--ease-out);
}

.page-about .about-reach__item[data-reveal] {
  transform: translateY(16px);
}

.page-about .about-reach__item[data-reveal][data-revealed] {
  transform: none;
}

.page-about .about-reach__item dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--ink-3);
}

.page-about .about-reach__item dd {
  margin: 10px 0 0;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.page-about .about-reach__num {
  font-family: var(--font-mono);
  font-size: clamp(36px, 6vw, 64px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--c-cream);
  padding-bottom: 6px;
  border-bottom: 6px solid var(--c-gold);
}

.page-about .about-reach__unit {
  font-size: 14px;
  letter-spacing: 0.08em;
  color: var(--c-gold);
}

.page-about .about-reach__wave {
  position: relative;
  height: 46px;
  margin-top: clamp(22px, 3vw, 34px);
  overflow: hidden;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-reach__wave::before,
.page-about .about-reach__wave::after {
  content: "";
  position: absolute;
  left: -10%;
  width: 120%;
  height: 60px;
  border-radius: 50%;
}

.page-about .about-reach__wave::before {
  top: 12px;
  border-top: 2px solid rgba(62, 140, 181, 0.6);
}

.page-about .about-reach__wave::after {
  top: 26px;
  border-top: 1px solid rgba(232, 179, 60, 0.45);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  padding: clamp(50px, 7.5vw, 100px) 0;
}

.page-about .about-timeline__figure {
  margin: clamp(24px, 3.6vw, 40px) 0 clamp(30px, 4.6vw, 52px);
}

.page-about .about-timeline__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 2.6vw, 26px);
}

.page-about .about-timeline__node {
  position: relative;
  padding: 24px 22px 26px;
  background: rgba(20, 80, 122, 0.42);
  border: 2px solid var(--line-hard);
  border-radius: var(--radius-card);
  transition: transform var(--dur) var(--ease-out), border-color var(--dur) var(--ease-out);
}

.page-about .about-timeline__node[data-reveal] {
  transform: translateY(16px);
  transition: transform 460ms var(--ease-out), border-color var(--dur) var(--ease-out);
}

.page-about .about-timeline__node[data-reveal][data-revealed] {
  transform: none;
}

.page-about .about-timeline__node:hover {
  transform: translateY(-4px);
  border-color: var(--c-cyan);
}

.page-about .about-timeline__node::before {
  content: "";
  position: absolute;
  top: -8px;
  left: 22px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--c-gold);
  box-shadow: 0 0 0 5px rgba(11, 42, 69, 0.95);
}

.page-about .about-timeline__year {
  margin: 0 0 12px;
  font-size: 14px;
  letter-spacing: 0.16em;
  color: var(--c-gold);
}

.page-about .about-timeline__node h3 {
  margin: 0 0 10px;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.42;
  color: var(--c-cream);
}

.page-about .about-timeline__node p:last-child {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-2);
}

/* ---------- 协作与认可 ---------- */
.page-about .about-partners {
  padding: clamp(48px, 7vw, 92px) 0;
  background: linear-gradient(180deg, var(--c-deep) 0%, var(--c-night) 100%);
  border-top: 1px solid var(--line-soft);
}

.page-about .about-partners__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin-top: clamp(26px, 3.6vw, 44px);
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-card);
  overflow: hidden;
}

.page-about .about-partners__item {
  padding: clamp(22px, 3vw, 34px);
  background: rgba(11, 42, 69, 0.72);
}

.page-about .about-partners__num {
  margin: 0;
  font-size: clamp(40px, 5.6vw, 64px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--c-gold);
  padding-bottom: 6px;
  border-bottom: 6px solid var(--c-orange);
  display: inline-block;
}

.page-about .about-partners__item h3 {
  margin: 16px 0 10px;
  font-size: 18px;
  font-weight: 700;
  color: var(--c-cream);
}

.page-about .about-partners__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--ink-2);
}

/* ---------- 服务方式 ---------- */
.page-about .about-practice {
  padding: clamp(48px, 7vw, 92px) 0;
}

.page-about .about-practice__grid {
  margin-top: clamp(26px, 3.6vw, 44px);
  gap: clamp(16px, 2.2vw, 24px);
}

.page-about .about-practice__card {
  padding: clamp(20px, 2.8vw, 30px);
  background: rgba(20, 80, 122, 0.36);
  border: 1px solid var(--line-soft);
  border-left: 4px solid var(--c-orange);
  border-radius: var(--radius-card);
  transition: transform var(--dur) var(--ease-out), background-color var(--dur) var(--ease-out);
}

.page-about .about-practice__card:hover {
  transform: translateY(-4px);
  background: rgba(20, 80, 122, 0.56);
}

.page-about .about-practice__card h3 {
  margin: 0 0 12px;
  font-size: clamp(18px, 2vw, 22px);
  font-weight: 700;
  line-height: 1.4;
  transform: skewX(-2deg);
  color: var(--c-cream);
}

.page-about .about-practice__card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-2);
}

/* ---------- 收尾引导 ---------- */
.page-about .about-next {
  padding: clamp(44px, 6vw, 78px) 0 clamp(58px, 7.5vw, 100px);
  background: var(--c-night);
  border-top: 1px solid var(--line-soft);
}

.page-about .about-next__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.4vw, 42px);
  align-items: center;
}

.page-about .about-next__text p {
  margin: 0;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-2);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(3, 1fr);
  }

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

@media (min-width: 860px) {
  .page-about .about-era {
    grid-template-columns: var(--about-rail) 1fr;
  }

  .page-about .about-era__year {
    position: sticky;
    top: calc(var(--header-h) + 28px);
    align-self: start;
  }

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

@media (min-width: 900px) {
  .page-about .about-timeline__list {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about .about-next__inner {
    grid-template-columns: 1.35fr auto;
  }

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

@media (min-width: 960px) {
  .page-about .about-hero__inner {
    padding-right: clamp(0px, 4vw, 60px);
  }

  .page-about .about-team__head {
    grid-template-columns: 1.05fr 1fr;
  }

  .page-about .about-reach__inner {
    grid-template-columns: 1fr 1.06fr;
  }

  .page-about .about-team__figure,
  .page-about .about-reach__figure {
    margin-inline: 0;
  }
}

@media (min-width: 1200px) {
  .page-about .about-era {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(40px, 5vw, 76px);
  }
}