:root{
  --bg0:#07080c;
  --bg1:#0b0e18;
  --fg:#eef0f6;
  --muted:rgba(238,240,246,.72);
  --line:rgba(255,255,255,.10);
  --glass:rgba(255,255,255,.06);
  --glass2:rgba(255,255,255,.10);
  --shadow:0 18px 60px rgba(0,0,0,.55);
  --accent:#a279ff;
  --accent2:#64d2ff;
  --radius:20px;
  --radius2:26px;
  --max:1100px;
  --pad:clamp(18px,2.2vw,26px);
  --font: "Noto Sans SC", system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  color:var(--fg);
  background: radial-gradient(1200px 800px at 20% 10%, rgba(162,121,255,.20), transparent 60%),
              radial-gradient(1200px 800px at 70% 15%, rgba(100,210,255,.16), transparent 55%),
              linear-gradient(180deg, var(--bg0), var(--bg1));
  overflow-x:hidden;
}

a{color:inherit; text-decoration:none}
strong{font-weight:700}

.skip-link{
  position:absolute;
  left:-999px; top:10px;
  padding:10px 14px;
  border-radius:12px;
  background:#111428;
  border:1px solid var(--line);
  z-index:10;
}
.skip-link:focus{left:10px}

.bg{
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:-1;
}
#bg-canvas{
  width:100%;
  height:100%;
  display:block;
}
.bg__vignette{
  position:absolute; inset:0;
  background: radial-gradient(800px 600px at 50% 15%, transparent 45%, rgba(0,0,0,.60) 100%);
}
.bg__noise{
  position:absolute; inset:-20%;
  opacity:.08;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)' opacity='.55'/%3E%3C/svg%3E");
  transform:rotate(2deg);
}

.container{
  width:min(var(--max), calc(100% - var(--pad)*2));
  margin-inline:auto;
}

.topbar{
  position:sticky;
  top:0;
  z-index:20;
  backdrop-filter: blur(14px);
  background: linear-gradient(180deg, rgba(8,10,18,.70), rgba(8,10,18,.38));
  border-bottom:1px solid rgba(255,255,255,.06);
}
.topbar__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  padding:12px 0;
}
.brand{display:flex; align-items:center; gap:10px}
.brand__dot{
  width:10px; height:10px;
  border-radius:999px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  box-shadow: 0 0 0 6px rgba(162,121,255,.14);
}
.brand__text{font-weight:700; letter-spacing:.12em; text-transform:uppercase; font-size:12px; opacity:.9}
.nav{display:flex; gap:16px; flex-wrap:wrap; justify-content:flex-end}
.nav a{
  font-size:13px;
  color:rgba(238,240,246,.80);
  padding:8px 10px;
  border-radius:12px;
  border:1px solid transparent;
}
.nav a:hover{
  color:var(--fg);
  border-color:rgba(255,255,255,.10);
  background:rgba(255,255,255,.04);
}

.hero{
  padding: clamp(54px, 8vw, 92px) 0 34px;
}
.hero__inner{
  display:grid;
  grid-template-columns: 1.15fr .85fr;
  gap: clamp(18px, 3vw, 32px);
  align-items:start;
}
.kicker{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:13px;
  color:rgba(238,240,246,.74);
  letter-spacing:.12em;
  text-transform:uppercase;
}
.kicker::before{
  content:"";
  width:22px; height:1px;
  background:linear-gradient(90deg, transparent, rgba(255,255,255,.55));
}
.title{
  margin: 12px 0 14px;
  font-size: clamp(40px, 5.1vw, 62px);
  line-height: 1.02;
  letter-spacing:-.02em;
}
.title__sub{
  display:inline-block;
  font-weight:600;
  font-size: clamp(16px, 1.55vw, 20px);
  color: rgba(238,240,246,.78);
  margin-top: 12px;
}
.lead{
  margin: 0;
  max-width: 62ch;
  color: rgba(238,240,246,.78);
  font-size: 15.5px;
  line-height: 1.9;
}

.hero__stats{
  margin-top: 22px;
  display:grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}
.stat{
  border:1px solid rgba(255,255,255,.10);
  background: rgba(255,255,255,.04);
  border-radius: 18px;
  padding: 14px 14px 12px;
  box-shadow: 0 16px 40px rgba(0,0,0,.25);
}
.stat__value{
  font-weight:800;
  font-size: 22px;
  letter-spacing:-.02em;
}
.stat__label{
  margin-top:6px;
  font-size:12px;
  color: rgba(238,240,246,.68);
}

.hero__actions{
  margin-top: 18px;
  display:flex;
  gap: 12px;
  flex-wrap:wrap;
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding: 11px 14px;
  border-radius: 14px;
  border:1px solid rgba(255,255,255,.14);
  background: rgba(255,255,255,.04);
  color: var(--fg);
  cursor:pointer;
  user-select:none;
  transition: transform .15s ease, background .15s ease, border-color .15s ease;
  font-weight:600;
  font-size:13px;
}
.btn:active{transform: translateY(1px)}
.btn:hover{background: rgba(255,255,255,.06); border-color: rgba(255,255,255,.20)}
.btn--primary{
  border-color: rgba(162,121,255,.42);
  background: linear-gradient(135deg, rgba(162,121,255,.25), rgba(100,210,255,.14));
}
.btn--primary:hover{border-color: rgba(162,121,255,.62)}
.btn--ghost{background: transparent}
.btn__icon{opacity:.9}
.hint{
  margin-top: 14px;
  font-size:12px;
  color: rgba(238,240,246,.60);
}

.glass{
  background: linear-gradient(180deg, rgba(255,255,255,.08), rgba(255,255,255,.05));
  border: 1px solid rgba(255,255,255,.12);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}
.card{
  border-radius: var(--radius2);
  padding: 18px 18px 14px;
}
.card__top{display:flex; align-items:center; gap:14px}
.monogram{
  width:54px; height:54px;
  border-radius: 18px;
  display:grid; place-items:center;
  background: linear-gradient(135deg, rgba(162,121,255,.35), rgba(100,210,255,.20));
  border:1px solid rgba(255,255,255,.14);
  font-weight:800;
  letter-spacing:.08em;
}
.card__title{font-weight:800; font-size:16px; letter-spacing:.02em}
.card__subtitle{font-size:12px; color: rgba(238,240,246,.66); margin-top:2px}
.divider{
  height:1px;
  background: rgba(255,255,255,.10);
  margin: 14px 0;
}
.kv{margin:0; display:grid; gap:10px}
.kv__row{display:flex; justify-content:space-between; gap:14px}
.kv dt{color:rgba(238,240,246,.68); font-size:12px}
.kv dd{margin:0; font-weight:700; font-size:12px; letter-spacing:.02em}
.card__bottom{margin-top: 12px; display:flex; align-items:center; justify-content:space-between; gap:12px}
.badge{
  display:inline-flex; align-items:center; gap:8px;
  padding:7px 10px;
  border-radius:999px;
  background: rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.12);
  color: rgba(238,240,246,.86);
  font-size:12px;
  font-weight:700;
}
.small{font-size:12px; color: rgba(238,240,246,.68); line-height:1.7}

.section{
  padding: 56px 0;
}
.section__head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:18px;
  margin-bottom: 18px;
}
.h2{
  margin:0;
  font-size: 22px;
  letter-spacing:.02em;
}
.sub{
  margin:0;
  max-width: 68ch;
  color: rgba(238,240,246,.68);
  font-size: 13px;
  line-height: 1.9;
}
.h3{
  margin:0 0 10px;
  font-size: 16px;
  letter-spacing:.01em;
}
.panel{
  border-radius: var(--radius);
  padding: 18px;
}
.panel p{
  margin: 0 0 10px;
  color: rgba(238,240,246,.76);
  line-height: 1.95;
  font-size: 14px;
}
.panel p:last-child{margin-bottom:0}
.callout{
  margin-top: 10px;
  border-left: 2px solid rgba(162,121,255,.70);
  padding-left: 12px;
  color: rgba(238,240,246,.86);
  background: linear-gradient(90deg, rgba(162,121,255,.10), transparent 60%);
  border-radius: 10px;
}

.grid{display:grid; gap: 14px}
.grid--2{grid-template-columns: repeat(2, minmax(0, 1fr))}
.grid--3{grid-template-columns: repeat(3, minmax(0, 1fr))}

.timeline{
  border-radius: var(--radius2);
  padding: 12px;
}
.timeline__item{
  display:grid;
  grid-template-columns: 140px 1fr;
  gap: 14px;
  padding: 14px 14px;
  border-radius: 18px;
  border:1px solid rgba(255,255,255,.10);
  background: rgba(255,255,255,.03);
}
.timeline__item + .timeline__item{margin-top: 10px}
.timeline__date{
  font-size: 13px;
  font-weight:800;
  letter-spacing:.04em;
  color: rgba(238,240,246,.88);
}
.timeline__tag{
  margin-top: 8px;
  display:inline-flex;
  padding: 6px 10px;
  border-radius: 999px;
  border:1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.05);
  font-size: 12px;
  color: rgba(238,240,246,.70);
  width: fit-content;
}
.timeline__title{
  margin:0;
  font-size: 15px;
  font-weight:800;
}
.timeline__desc{
  margin: 6px 0 0;
  font-size: 13.5px;
  line-height: 1.9;
  color: rgba(238,240,246,.74);
}

.map svg{width:100%; height:auto; display:block}
.map__dot{fill: rgba(255,255,255,.92)}
.map__dot--b{fill: rgba(162,121,255,.95)}
.map__label{fill: rgba(238,240,246,.72); font-size: 15px; font-weight:700}
.map__pulse{
  fill: transparent;
  stroke: rgba(255,255,255,.55);
  stroke-width: 1.5;
  transform-origin: 160px 270px;
  animation: pulse 2.2s ease-out infinite;
}
.map__pulse--b{
  stroke: rgba(162,121,255,.62);
  transform-origin: 560px 160px;
  animation-delay: .35s;
}
.map__spark{fill: rgba(100,210,255,.92); filter: drop-shadow(0 0 10px rgba(100,210,255,.55))}
.map__caption{
  margin-top: 10px;
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap: 12px;
}

@keyframes pulse{
  0%{opacity:.0; transform: scale(.55)}
  20%{opacity:.55}
  100%{opacity:0; transform: scale(1.75)}
}

.metric{
  margin-top: 14px;
  padding: 12px 12px;
  border-radius: 18px;
  border:1px solid rgba(255,255,255,.10);
  background: rgba(255,255,255,.03);
}
.metric__num{
  font-size: 22px;
  font-weight: 900;
  letter-spacing:-.02em;
}
.metric__label{
  margin-top: 6px;
  font-size: 12px;
  color: rgba(238,240,246,.66);
}

.letter{
  border-radius: var(--radius2);
  padding: 22px 22px;
}
.letter p{
  margin: 0 0 12px;
  color: rgba(238,240,246,.80);
  line-height: 2.0;
  font-size: 14px;
}
.letter p:last-child{margin-bottom:0}
.signature{
  margin-top: 10px;
  text-align:right;
  font-weight: 800;
  letter-spacing:.08em;
}

.footer{
  padding: 26px 0 34px;
  border-top: 1px solid rgba(255,255,255,.06);
  background: rgba(0,0,0,.20);
}
.footer__inner{
  display:flex;
  justify-content:space-between;
  gap: 12px;
  flex-wrap:wrap;
}

/* reveal
   默认可见：避免本地打开时 JS 失效导致“全站无字”。当 JS 运行后会给 html 加上 .js，
   才启用渐显动画。 */
.reveal{
  opacity: 1;
  transform: none;
}
.js .reveal{
  opacity: 0;
  transform: translateY(10px);
  transition: opacity .8s cubic-bezier(.2,.8,.2,1), transform .8s cubic-bezier(.2,.8,.2,1);
}
.js .reveal.is-in{
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 980px){
  .hero__inner{grid-template-columns: 1fr; align-items:stretch}
  .hero__stats{grid-template-columns: 1fr; }
  .grid--2{grid-template-columns: 1fr}
  .grid--3{grid-template-columns: 1fr}
  .timeline__item{grid-template-columns: 1fr}
  .section__head{flex-direction:column; align-items:flex-start}
  .nav{display:none}
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  .reveal{transition:none}
  .map__pulse{animation:none}
}