.page-about{
  background: var(--foam);
  color: var(--ink);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero{
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(22px,5vw,42px) 0 clamp(8px,2vw,16px);
  background:
    radial-gradient(140% 100% at 88% -20%, rgba(20,92,142,.82) 0%, rgba(11,44,71,.24) 46%, transparent 72%),
    radial-gradient(90% 80% at -10% 110%, rgba(53,224,161,.16), transparent 62%),
    var(--abyss);
  color: var(--silver);
  border-bottom: 1px solid var(--line-dark);
}

.page-about .breadcrumb__list{
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 clamp(18px,3vw,28px);
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
}
.page-about .breadcrumb__item{ color: var(--mist); }
.page-about .breadcrumb__item + .breadcrumb__item::before{
  content: "/";
  margin-right: 8px;
  color: rgba(201,214,223,.4);
}
.page-about .breadcrumb__link{
  color: var(--silver);
  text-decoration: none;
  border-bottom: 1px solid rgba(201,214,223,.3);
}
.page-about .breadcrumb__link:hover{ color: var(--coral); border-color: var(--coral); }

.page-about .about-hero__kicker{
  margin: 0 0 clamp(10px,2vw,18px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--signal);
  text-transform: uppercase;
}

.page-about .about-hero__title{
  margin: 0 0 clamp(18px,3vw,26px);
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(36px, 9.4vw, 88px);
  line-height: .98;
  letter-spacing: -.05em;
  color: #fff;
  transform: skewX(-4deg);
  transform-origin: left bottom;
}
.page-about .about-hero__title em{
  display: block;
  font-style: normal;
  color: var(--coral);
  font-size: .58em;
  letter-spacing: -.03em;
  line-height: 1.06;
  margin-top: .18em;
}

.page-about .about-hero__lead{
  max-width: 34em;
  margin: 0 0 clamp(26px,4vw,40px);
  font-size: 16px;
  line-height: 1.78;
  color: var(--silver);
}

.page-about .about-hero__stats{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
  gap: clamp(12px,3vw,28px);
  margin: 0;
  padding-top: clamp(18px,3vw,26px);
  border-top: 1px solid var(--line-dark);
}
.page-about .about-hero__stat dt{
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--mist);
  margin-bottom: 6px;
}
.page-about .about-hero__stat dd{
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 4px;
}
.page-about .about-hero__num{
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(24px,4.6vw,34px);
  letter-spacing: -.02em;
  color: #fff;
}
.page-about .about-hero__unit{
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--signal);
}

.page-about .about-banner{
  max-width: 1180px;
  margin: clamp(28px,5vw,48px) auto 0;
  padding: 0 var(--gutter);
}
.page-about .about-banner img{
  display: block;
  width: 100%;
  height: auto;
  border-radius: 3px;
  border: 1px solid var(--line-dark);
}
.page-about .about-banner figcaption{
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--mist);
}

/* ---------- 起点 ---------- */
.page-about .about-origin{
  padding: clamp(48px,8vw,100px) 0 clamp(36px,6vw,72px);
  background: var(--foam);
}
.page-about .section-head__num{
  font-family: var(--font-mono);
  color: var(--coral);
  letter-spacing: .1em;
}
.page-about .section-head__title{
  letter-spacing: -.035em;
  line-height: 1.12;
}
.page-about .section-head__lead{
  max-width: 40em;
  line-height: 1.75;
  color: var(--mist-ink);
}

.page-about .about-origin__grid{
  display: grid;
  gap: clamp(24px,4vw,48px);
  margin-top: clamp(26px,4vw,44px);
}
.page-about .about-origin__prose p{
  margin: 0 0 1.1em;
  line-height: 1.8;
}
.page-about .about-origin__side{
  background: #fff;
  border: 1px solid var(--line-light);
  border-radius: 14px;
  box-shadow: var(--shadow-1);
  padding: clamp(20px,3vw,28px);
  transform: rotate(-1.2deg);
}
.page-about .about-origin__side-label{
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--current);
}
.page-about .about-origin__list{
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}
.page-about .about-origin__list li{
  position: relative;
  padding-left: 16px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--mist-ink);
}
.page-about .about-origin__list li::before{
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--coral);
}
.page-about .about-origin__list strong{ color: var(--ink); }

.page-about .about-timeline{
  margin: clamp(36px,6vw,64px) 0 0;
  padding: 0;
  list-style: none;
}
.page-about .about-timeline__item{
  position: relative;
  display: grid;
  grid-template-columns: 74px 1fr;
  gap: clamp(12px,3vw,30px);
  padding-bottom: clamp(22px,3.5vw,34px);
}
.page-about .about-timeline__item::before{
  content: "";
  position: absolute;
  left: 82px;
  top: 8px;
  bottom: 0;
  width: 1px;
  background: var(--line-light);
}
.page-about .about-timeline__item:last-child::before{ display: none; }
.page-about .about-timeline__year{
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--current);
  padding-top: 2px;
  white-space: nowrap;
}
.page-about .about-timeline__body{
  padding-left: clamp(8px,2vw,18px);
  border-left: 1px solid transparent;
}
.page-about .about-timeline__title{
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--ink);
}
.page-about .about-timeline__text{
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist-ink);
  max-width: 44em;
}

/* ---------- 覆盖范围 ---------- */
.page-about .about-coverage{
  padding: clamp(48px,8vw,100px) 0;
  background:
    radial-gradient(100% 70% at 100% 0%, rgba(20,92,142,.55), transparent 62%),
    radial-gradient(70% 60% at 0% 100%, rgba(53,224,161,.12), transparent 60%),
    var(--trench);
  color: var(--silver);
  border-top: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
}
.page-about .about-coverage .section-head__title{ color: #fff; }
.page-about .about-coverage .section-head__lead{ color: var(--mist); }

.page-about .about-bars{
  display: flex;
  gap: 12px;
  margin: clamp(26px,4vw,40px) 0 clamp(30px,5vw,48px);
  padding: 4px 2px 14px;
  list-style: none;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}
.page-about .about-bars__item{
  flex: 0 0 auto;
  min-width: 148px;
  scroll-snap-align: start;
  padding: 16px 18px;
  border: 1px solid var(--line-dark);
  border-radius: 14px;
  background: rgba(201,214,223,.05);
}
.page-about .about-bars__num{
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 28px;
  letter-spacing: -.02em;
  color: var(--signal);
}
.page-about .about-bars__label{
  display: block;
  margin-top: 6px;
  font-size: 13px;
  color: var(--mist);
}

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

.page-about .about-tabs__bar{
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 10px;
  scrollbar-width: thin;
}
.page-about .about-tabs .tab{
  flex: 0 0 auto;
  padding: 9px 16px;
  border-radius: 999px;
  border: 1px solid var(--line-dark);
  background: transparent;
  color: var(--silver);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .01em;
  cursor: pointer;
  transition: background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}
.page-about .about-tabs .tab:hover{ border-color: var(--silver); }
.page-about .about-tabs .tab[aria-selected="true"]{
  background: var(--coral);
  border-color: var(--coral);
  color: #07131f;
  font-weight: 800;
}
.page-about .about-tabs .tab:focus-visible{
  outline: 2px solid var(--signal);
  outline-offset: 2px;
}
.page-about .about-tabs__panel{ padding-top: 18px; }
.page-about .about-list{
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}
.page-about .about-list li{
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--silver);
}
.page-about .about-list li::before{
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 7px;
  height: 1px;
  background: var(--signal);
}

.page-about .about-coverage__art{
  margin: 0;
  border: 1px solid var(--line-dark);
  border-radius: 4px;
  overflow: hidden;
  background: rgba(6,26,43,.45);
}
.page-about .about-coverage__art img{
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}
.page-about .about-coverage__art figcaption{
  padding: 12px 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .03em;
  color: var(--mist);
  border-top: 1px solid var(--line-dark);
}

/* ---------- 流程 ---------- */
.page-about .about-flow{
  padding: clamp(48px,8vw,100px) 0;
  background: var(--foam);
}
.page-about .about-flow__grid{
  display: grid;
  gap: clamp(28px,4vw,52px);
  margin-top: clamp(26px,4vw,44px);
}
.page-about .about-steps{
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: clamp(20px,3vw,30px);
}
.page-about .about-step{
  position: relative;
  padding: clamp(18px,3vw,26px) clamp(18px,3vw,26px) clamp(18px,3vw,26px) clamp(56px,7vw,72px);
  background: #fff;
  border: 1px solid var(--line-light);
  border-radius: 14px;
  box-shadow: var(--shadow-1);
}
.page-about .about-step:nth-child(2){ transform: rotate(1.1deg); }
.page-about .about-step__idx{
  position: absolute;
  left: clamp(16px,2.6vw,22px);
  top: clamp(18px,3vw,26px);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 20px;
  color: var(--coral);
  letter-spacing: -.02em;
}
.page-about .about-step__title{
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -.01em;
}
.page-about .about-step__text{
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist-ink);
}
.page-about .about-flow__art{
  margin: 0;
  border: 1px solid var(--line-light);
  border-radius: 4px;
  overflow: hidden;
  background: linear-gradient(160deg, rgba(20,92,142,.10), rgba(53,224,161,.10));
}
.page-about .about-flow__art img{
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}
.page-about .about-flow__art figcaption{
  padding: 12px 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--mist-ink);
  border-top: 1px solid var(--line-light);
}

/* ---------- 呼吸段 ---------- */
.page-about .about-breath{
  padding: clamp(64px,13vw,150px) 0;
  background:
    radial-gradient(80% 120% at 50% 120%, rgba(20,92,142,.6), transparent 65%),
    var(--abyss);
  color: var(--silver);
  text-align: center;
  border-top: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
}
.page-about .about-breath__line{
  max-width: 20em;
  margin: 0 auto;
  font-size: clamp(26px, 5vw, 52px);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -.045em;
  color: #fff;
}
.page-about .about-breath__line em{
  font-style: normal;
  color: var(--signal);
  display: block;
  margin-top: .1em;
}
.page-about .about-breath__sub{
  margin: clamp(18px,3vw,28px) auto 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--mist);
}

/* ---------- 团队 ---------- */
.page-about .about-team{
  padding: clamp(48px,8vw,100px) 0;
  background: var(--foam);
}
.page-about .about-team__grid{
  display: grid;
  gap: clamp(30px,5vw,56px);
  margin-top: clamp(26px,4vw,44px);
  align-items: center;
}
.page-about .about-team__figure{
  margin: 0;
  display: grid;
  gap: clamp(20px,3vw,28px);
  justify-items: center;
}
.page-about .about-team__ring{
  position: relative;
  width: min(280px, 68vw);
  aspect-ratio: 1 / 1;
}
.page-about .about-team__ring svg{
  width: 100%;
  height: 100%;
  display: block;
}
.page-about .about-team__ring circle{
  transition: stroke-width .25s var(--ease), opacity .25s var(--ease), filter .25s var(--ease);
}
.page-about .about-team__center{
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 2px;
  pointer-events: none;
}
.page-about .about-team__num{
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(34px,7vw,46px);
  letter-spacing: -.03em;
  color: var(--ink);
}
.page-about .about-team__cap{
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--mist-ink);
}
.page-about .about-team__legend{
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
  width: 100%;
  max-width: 320px;
}
.page-about .about-team__legend li{
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 10px;
  border-radius: 8px;
  font-size: 14px;
  color: var(--mist-ink);
  transition: background .2s var(--ease), color .2s var(--ease);
}
.page-about .about-team__legend li:hover,
.page-about .about-team__legend li:focus-within{
  background: rgba(20,92,142,.08);
  color: var(--ink);
}
.page-about .about-team__legend strong{
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--ink);
}
.page-about .about-team__dot{
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex: 0 0 auto;
}
.page-about .about-team__figure:has(li[data-seg="1"]:hover) circle[data-seg="1"],
.page-about .about-team__figure:has(li[data-seg="2"]:hover) circle[data-seg="2"],
.page-about .about-team__figure:has(li[data-seg="3"]:hover) circle[data-seg="3"],
.page-about .about-team__figure:has(li[data-seg="4"]:hover) circle[data-seg="4"],
.page-about .about-team__figure:has(li[data-seg="5"]:hover) circle[data-seg="5"]{
  stroke-width: 23;
}
.page-about .about-team__heading{
  margin: 0 0 14px;
  font-size: clamp(20px,3vw,26px);
  font-weight: 800;
  letter-spacing: -.025em;
}
.page-about .about-team__copy p{
  margin: 0 0 1em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--mist-ink);
  max-width: 36em;
}
.page-about .about-team__actions{
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

/* ---------- 合作 ---------- */
.page-about .about-partners{
  padding: clamp(48px,8vw,100px) 0;
  background:
    radial-gradient(90% 70% at 0% 0%, rgba(20,92,142,.5), transparent 62%),
    var(--trench);
  color: var(--silver);
  border-top: 1px solid var(--line-dark);
}
.page-about .about-partners .section-head__title{ color: #fff; }
.page-about .about-partners .section-head__lead{ color: var(--mist); }

.page-about .about-partners__grid{
  display: grid;
  gap: clamp(14px,2.4vw,22px);
  margin-top: clamp(26px,4vw,44px);
}
.page-about .about-partner{
  padding: clamp(20px,3vw,28px);
  border: 1px solid var(--line-dark);
  border-radius: 14px;
  background: rgba(201,214,223,.05);
  transition: transform .25s var(--ease), border-color .25s var(--ease);
}
.page-about .about-partner:hover{
  transform: translateY(-4px);
  border-color: rgba(255,107,74,.55);
}
.page-about .about-partner__num{
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 34px;
  letter-spacing: -.03em;
  color: var(--signal);
}
.page-about .about-partner__num span{
  font-size: 14px;
  letter-spacing: .04em;
  color: var(--silver);
  margin-left: 4px;
}
.page-about .about-partner__title{
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 800;
  color: #fff;
  letter-spacing: -.01em;
}
.page-about .about-partner__text{
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-partners__note{
  margin-top: clamp(26px,4vw,40px);
  padding-top: clamp(20px,3vw,28px);
  border-top: 1px solid var(--line-dark);
}
.page-about .about-partners__note p{
  margin: 0 0 18px;
  max-width: 46em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--silver);
}
.page-about .about-partners__note a{
  color: var(--coral);
  text-decoration: none;
  border-bottom: 1px solid rgba(255,107,74,.5);
}
.page-about .about-partners__note a:hover{ border-color: var(--coral); }
.page-about .about-partners__actions{
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 收尾 ---------- */
.page-about .about-cta{
  padding: clamp(44px,7vw,88px) 0;
  background: var(--abyss);
  color: var(--silver);
}
.page-about .about-cta__inner{
  display: grid;
  gap: 24px;
}
.page-about .about-cta__title{
  margin: 0 0 10px;
  font-size: clamp(24px,4vw,38px);
  font-weight: 900;
  letter-spacing: -.04em;
  line-height: 1.15;
  color: #fff;
  transform: skewX(-3deg);
  transform-origin: left bottom;
}
.page-about .about-cta__text{
  margin: 0;
  max-width: 38em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}
.page-about .about-cta__actions{
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px){
  .page-about .about-flow__grid{ grid-template-columns: 1fr .82fr; align-items: start; }
  .page-about .about-partners__grid{ grid-template-columns: repeat(2, 1fr); }
  .page-about .about-cta__inner{
    grid-template-columns: 1.3fr .7fr;
    align-items: center;
  }
  .page-about .about-cta__actions{ justify-content: flex-end; }
  .page-about .about-team__figure{
    grid-template-columns: auto 1fr;
    justify-items: start;
    align-items: center;
  }
  .page-about .about-team__legend{ max-width: none; }
  .page-about .about-timeline__item{ grid-template-columns: 110px 1fr; }
  .page-about .about-timeline__item::before{ left: 118px; }
}

@media (min-width: 980px){
  .page-about .about-origin__grid{ grid-template-columns: 7fr 4fr; align-items: start; }
  .page-about .about-coverage__grid{ grid-template-columns: 1.1fr .9fr; align-items: start; }
  .page-about .about-team__grid{ grid-template-columns: 1fr 1fr; }
  .page-about .about-partners__grid{ grid-template-columns: repeat(3, 1fr); }
  .page-about .about-bars{ overflow-x: visible; flex-wrap: wrap; }
  .page-about .about-bars__item{ flex: 1 1 0; min-width: 0; }
}

@media (prefers-reduced-motion: reduce){
  .page-about .about-origin__side,
  .page-about .about-step:nth-child(2),
  .page-about .about-hero__title,
  .page-about .about-cta__title{ transform: none; }
  .page-about .about-partner{ transition: none; }
  .page-about .about-partner:hover{ transform: none; }
}