:root{
  --bg:#05060a;
  --fg:#e8edf7;
  --muted:#8b95ab;
  --line:rgba(255,255,255,.09);
  --glass:rgba(18,22,34,.55);
  --violet:#7b6cff;
  --cyan:#4de3d0;
  --pink:#ff5ea8;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg);
  color:var(--fg);
  font:16px/1.7 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
  min-height:100dvh;
}

/* ── 背景 ── */
#bg{
  position:fixed;inset:0;width:100%;height:100%;
  display:block;z-index:0;
  background:radial-gradient(1200px 800px at 70% -10%, #131a33 0%, #05060a 60%);
}
.grain{
  position:fixed;inset:-50%;z-index:1;pointer-events:none;opacity:.055;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  animation:grainShift 8s steps(6) infinite;
}
@keyframes grainShift{
  0%{transform:translate(0,0)}20%{transform:translate(-3%,2%)}40%{transform:translate(2%,-3%)}
  60%{transform:translate(-2%,-2%)}80%{transform:translate(3%,1%)}100%{transform:translate(0,0)}
}

/* ── 光标 ── */
#cursor{
  position:fixed;left:0;top:0;width:34px;height:34px;border-radius:50%;
  border:1px solid rgba(124,108,255,.55);
  pointer-events:none;z-index:9999;
  transform:translate3d(-100px,-100px,0);
  transition:width .25s var(--ease),height .25s var(--ease),border-color .25s,background .25s;
  mix-blend-mode:screen;
}
#cursor.hover{width:64px;height:64px;background:rgba(123,108,255,.10);border-color:rgba(77,227,208,.7)}
#cursor-dot{
  position:fixed;left:0;top:0;width:6px;height:6px;border-radius:50%;
  background:linear-gradient(135deg,var(--violet),var(--cyan));
  pointer-events:none;z-index:10000;transform:translate3d(-100px,-100px,0);
  box-shadow:0 0 18px rgba(123,108,255,.9);
}
@media (hover:none){#cursor,#cursor-dot{display:none}}

/* ── 顶栏 ── */
.topbar{
  position:fixed;top:0;left:0;right:0;z-index:100;
  display:flex;align-items:center;justify-content:space-between;
  padding:22px clamp(20px,4vw,56px);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  background:linear-gradient(180deg,rgba(5,6,10,.72),rgba(5,6,10,0));
  border-bottom:1px solid transparent;
  transition:border-color .4s,background .4s;
}
.topbar.scrolled{border-bottom-color:var(--line);background:rgba(5,6,10,.82)}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--fg)}
.brand-mark{
  width:30px;height:30px;border-radius:9px;display:grid;place-items:center;
  font-weight:800;font-size:15px;
  background:linear-gradient(135deg,rgba(123,108,255,.22),rgba(77,227,208,.18));
  border:1px solid rgba(123,108,255,.35);
  color:#cfd6ff;
}
.brand-text{font-weight:650;letter-spacing:.02em}
.nav{display:flex;gap:6px}
.nav a{
  position:relative;color:var(--muted);text-decoration:none;
  padding:8px 14px;border-radius:10px;font-size:14.5px;
  transition:color .25s,background .25s;
}
.nav a:hover{color:var(--fg);background:rgba(255,255,255,.05)}
.nav a.active{color:var(--fg)}
.nav a.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--violet),var(--cyan));
  animation:navIn .35s var(--ease);
}
@keyframes navIn{from{transform:scaleX(0);opacity:0}to{transform:scaleX(1);opacity:1}}
.menu-btn{display:none;background:none;border:0;padding:8px;cursor:pointer}
.menu-btn span{display:block;width:22px;height:2px;background:var(--fg);margin:5px 0;border-radius:2px;transition:.3s var(--ease)}
.menu-btn[aria-expanded="true"] span:first-child{transform:translateY(3.5px) rotate(45deg)}
.menu-btn[aria-expanded="true"] span:last-child{transform:translateY(-3.5px) rotate(-45deg)}

/* ── 布局 ── */
.view{
  position:relative;z-index:2;
  min-height:100dvh;
  padding:120px clamp(20px,5vw,72px) 60px;
  max-width:1180px;margin:0 auto;
}
.page{display:none}
.page.is-active{display:block;animation:pageIn .6s var(--ease)}
@keyframes pageIn{
  from{opacity:0;transform:translateY(18px)}
  to{opacity:1;transform:none}
}
.eyebrow{
  font-size:12px;letter-spacing:.32em;color:var(--muted);
  text-transform:uppercase;margin:0 0 18px;
}
.hero-title{
  font-size:clamp(38px,7vw,84px);
  line-height:1.06;letter-spacing:-.03em;font-weight:760;
  margin:0 0 26px;
  text-shadow:0 2px 40px rgba(0,0,0,.55);
}
.hero-title .line{display:block}
.gradient-text{
  background:linear-gradient(105deg,#8b7bff 0%,#4de3d0 45%,#ff5ea8 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  background-size:200% 100%;
  animation:shine 7s linear infinite;
}
@keyframes shine{to{background-position:200% 0}}
.title{font-size:clamp(30px,4.4vw,52px);letter-spacing:-.02em;margin:0 0 34px;font-weight:720}
.lede{font-size:clamp(15px,1.5vw,18px);color:#c3ccdf;max-width:56ch;margin:0 0 36px;text-shadow:0 1px 18px rgba(0,0,0,.6)}
.lede br{display:none}
@media (min-width:720px){.lede br{display:block}}

/* ── 按钮 ── */
.cta{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:46px}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:13px 24px;border-radius:14px;text-decoration:none;
  font-size:15px;font-weight:600;letter-spacing:.01em;
  transition:transform .25s var(--ease),box-shadow .25s,background .25s,border-color .25s;
  will-change:transform;
}
.btn-primary{
  color:#08090f;background:linear-gradient(120deg,#9d8cff,#4de3d0);
  box-shadow:0 10px 40px -12px rgba(123,108,255,.8);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 50px -12px rgba(77,227,208,.7)}
.btn-ghost{
  color:var(--fg);border:1px solid var(--line);background:rgba(255,255,255,.03);
}
.btn-ghost:hover{transform:translateY(-2px);border-color:rgba(123,108,255,.6);background:rgba(123,108,255,.09)}

/* ── 打字机 ── */
.typebar{
  display:inline-flex;align-items:center;gap:10px;
  padding:12px 18px;border-radius:12px;
  border:1px solid var(--line);background:rgba(10,12,20,.6);
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:14px;color:#9fb0cc;max-width:100%;overflow:hidden;
}
.typebar .prompt{color:var(--cyan)}
.caret{display:inline-block;width:8px;height:1.05em;background:var(--violet);animation:blink 1.1s steps(2) infinite;vertical-align:-2px}
@keyframes blink{50%{opacity:0}}

/* ── 滚动提示 ── */
.scroll-hint{position:absolute;left:50%;bottom:38px;transform:translateX(-50%);opacity:.55}
.scroll-hint i{
  display:block;width:22px;height:36px;border:1px solid rgba(255,255,255,.35);
  border-radius:12px;position:relative;
}
.scroll-hint i::after{
  content:"";position:absolute;left:50%;top:7px;width:3px;height:7px;border-radius:2px;
  background:var(--cyan);transform:translateX(-50%);animation:wheel 1.8s var(--ease) infinite;
}
@keyframes wheel{0%{opacity:1;transform:translate(-50%,0)}70%{opacity:0;transform:translate(-50%,14px)}100%{opacity:0}}

/* ── 玻璃卡 ── */
.glass,.card{
  position:relative;border-radius:20px;
  border:1px solid var(--line);
  background:var(--glass);
  backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  padding:26px 28px;
}
.glass h3,.card h3{margin:0 0 10px;font-size:18px;letter-spacing:-.01em}
.glass p,.card p{margin:0;color:#a9b4c9;font-size:14.5px;line-height:1.75}
.glass.wide{margin-top:22px}
.grid{display:grid;gap:18px}
.grid + .grid{margin-top:18px}
.grid.two{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}

.stats{display:flex;gap:18px;flex-wrap:wrap;margin:22px 0}
.stat{
  flex:1 1 160px;padding:20px 22px;border-radius:18px;
  border:1px solid var(--line);background:rgba(12,14,22,.5);
}
.stat b{
  display:block;font-size:34px;font-weight:750;letter-spacing:-.03em;
  background:linear-gradient(120deg,#9d8cff,#4de3d0);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.stat span{color:var(--muted);font-size:13px}

.code{
  margin:0;padding:16px 18px;border-radius:12px;overflow:auto;
  background:rgba(0,0,0,.42);border:1px solid var(--line);
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:13px;line-height:1.8;color:#9fb0cc;
}

/* ── 项目卡 ── */
.cards{display:grid;gap:18px;grid-template-columns:repeat(auto-fit,minmax(225px,1fr))}
.card{
  overflow:hidden;transition:transform .35s var(--ease),border-color .35s,box-shadow .35s;
  transform-style:preserve-3d;will-change:transform;
  text-decoration:none;color:inherit;
}
.card:hover{
  border-color:rgba(123,108,255,.45);
  box-shadow:0 30px 70px -30px rgba(123,108,255,.55);
}
.card-glow{
  position:absolute;inset:-40% -20% auto;height:220px;pointer-events:none;
  background:radial-gradient(60% 100% at 50% 0%,rgba(123,108,255,.28),transparent 70%);
  opacity:0;transition:opacity .4s;
}
.card:hover .card-glow{opacity:1}
.tag{
  display:inline-block;font-size:11px;letter-spacing:.18em;color:var(--cyan);
  border:1px solid rgba(77,227,208,.3);border-radius:999px;padding:3px 10px;margin-bottom:14px;
}
.card .go{
  display:inline-block;margin-top:16px;font-size:13.5px;color:var(--violet);
  opacity:.85;transition:transform .3s var(--ease),opacity .3s;
}
.card:hover .go{transform:translateX(4px);opacity:1}

/* ── 实验室 ── */
.badge{
  display:inline-block;vertical-align:middle;margin-left:8px;
  font-size:11px;font-weight:500;letter-spacing:.06em;
  padding:2px 9px;border-radius:999px;color:var(--cyan);
  border:1px solid rgba(77,227,208,.32);background:rgba(77,227,208,.08);
}
.hint{margin:14px 0 0;font-size:13px;color:var(--muted)}
.hint code{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:12.5px;padding:1px 6px;border-radius:6px;
  background:rgba(255,255,255,.06);border:1px solid var(--line);color:#c8d2e6;
}

.term{
  border-radius:14px;border:1px solid var(--line);
  background:rgba(0,0,0,.42);padding:14px 16px;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:13px;line-height:1.65;height:250px;
  display:flex;flex-direction:column;overflow:hidden;
  cursor:text;
}
.term-out{
  flex:1;overflow-y:auto;padding-right:6px;
  scrollbar-gutter:stable;
  overscroll-behavior:contain;
}
/* Chrome / Safari：自定义滚动条（不要同时写 scrollbar-width，否则会被浏览器忽略） */
.term-out::-webkit-scrollbar{width:8px;height:8px}
.term-out::-webkit-scrollbar-track{background:transparent}
.term-out::-webkit-scrollbar-thumb{
  border-radius:8px;border:2px solid transparent;background-clip:content-box;
  background-image:linear-gradient(180deg,rgba(123,108,255,.80),rgba(77,227,208,.70));
}
.term-out::-webkit-scrollbar-thumb:hover{
  background-image:linear-gradient(180deg,rgba(139,126,255,.98),rgba(77,227,208,.90));
}
.term-out::-webkit-scrollbar-corner{background:transparent}
/* Firefox：只认标准属性 */
@supports not selector(::-webkit-scrollbar){
  .term-out{scrollbar-width:thin;scrollbar-color:rgba(123,108,255,.6) transparent}
}
.term-row{white-space:pre-wrap;word-break:break-word;color:#a9b6cd}
.term-row.cmd{color:#dfe7f5}
.term-row .pr{color:var(--cyan)}
.term-row.err{color:#ff8b8b}
.term-row.ok{color:#7ce7b0}
.term-row.dim{color:#6d7a92}
.term-line{display:flex;align-items:center;gap:8px;padding-top:8px;border-top:1px solid rgba(255,255,255,.05);margin-top:8px}
.term-prompt{color:var(--violet);white-space:nowrap;font-size:12.5px}
.term-in{
  flex:1;min-width:0;background:none;border:0;outline:none;
  color:var(--fg);font:inherit;caret-color:var(--cyan);
}
.term-in::placeholder{color:#55617a}

.particles{
  display:block;width:100%;height:210px;border-radius:14px;
  border:1px solid var(--line);background:rgba(0,0,0,.30);
  cursor:crosshair;touch-action:none;
}

.react{
  height:120px;border-radius:14px;border:1px solid var(--line);
  display:grid;place-items:center;text-align:center;
  font-weight:650;font-size:16px;letter-spacing:.02em;
  background:rgba(123,108,255,.10);color:var(--fg);
  cursor:pointer;user-select:none;
  transition:background .18s var(--ease),color .18s,border-color .18s,transform .12s;
}
.react:active{transform:scale(.985)}
.react.waiting{background:rgba(255,176,46,.12);border-color:rgba(255,176,46,.4);color:#ffcf7a}
.react.ready{background:rgba(61,220,151,.20);border-color:rgba(61,220,151,.55);color:#b9ffe0}
.react.done{background:rgba(77,227,208,.12);border-color:rgba(77,227,208,.4)}
.react.foul{background:rgba(255,107,107,.14);border-color:rgba(255,107,107,.45);color:#ffb3b3}

.facts{margin:0;display:grid;grid-template-columns:auto 1fr;gap:9px 16px;font-size:13px}
.facts dt{color:var(--muted);white-space:nowrap}
.facts dd{margin:0;color:#c6d0e2;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* 彩蛋：matrix 雨 */
#fx{
  position:fixed;inset:0;width:100%;height:100%;z-index:9997;
  pointer-events:none;opacity:0;transition:opacity .5s var(--ease);
}
#fx.on{opacity:.85}

/* ── 联系 ── */
.contact-list{display:flex;flex-direction:column;gap:12px;max-width:720px}
.contact-row{
  display:grid;grid-template-columns:110px 1fr 24px;align-items:center;gap:16px;
  padding:18px 22px;border-radius:16px;border:1px solid var(--line);
  background:rgba(12,14,22,.45);text-decoration:none;color:inherit;
  transition:border-color .3s,transform .3s var(--ease),background .3s;
}
.contact-row:hover{border-color:rgba(123,108,255,.5);transform:translateX(6px);background:rgba(123,108,255,.07)}
.contact-row .k{color:var(--muted);font-size:13px;letter-spacing:.08em;text-transform:uppercase}
.contact-row .v{font-size:15px}
.contact-row .a{color:var(--violet);text-align:right}
.foot-note{margin-top:28px;color:var(--muted);font-size:13.5px}

/* ── 全局滚动条（暗色主题统一） ── */
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{
  border-radius:10px;border:3px solid transparent;background-clip:content-box;
  background-image:linear-gradient(180deg,rgba(123,108,255,.42),rgba(77,227,208,.34));
}
::-webkit-scrollbar-thumb:hover{
  background-image:linear-gradient(180deg,rgba(123,108,255,.70),rgba(77,227,208,.58));
}
@supports not selector(::-webkit-scrollbar){
  html{scrollbar-width:thin;scrollbar-color:rgba(123,108,255,.45) transparent}
}

/* ── 页脚 ── */
.footer{
  position:relative;z-index:2;
  display:flex;gap:10px;flex-wrap:wrap;align-items:center;justify-content:center;
  padding:28px 20px 40px;color:var(--muted);font-size:13px;
}
.footer .dot{opacity:.4}

/* ── 文字可读性遮罩：星云仍可见，正文区域压暗 ── */
.scrim{
  position:fixed;inset:0;z-index:1;pointer-events:none;
  background:
    radial-gradient(58% 55% at 24% 46%, rgba(5,6,10,.80) 0%, rgba(5,6,10,.42) 45%, transparent 72%),
    linear-gradient(180deg, rgba(5,6,10,.55) 0%, rgba(5,6,10,.10) 28%, rgba(5,6,10,.55) 100%);
}

/* ── 进场动画（仅在 JS 可用时隐藏，避免无 JS 白屏） ── */
.js .reveal{opacity:0;transform:translateY(16px);transition:opacity .55s var(--ease),transform .55s var(--ease)}
.js .reveal.in{opacity:1;transform:none}

/* ── 移动端 ── */
@media (max-width:720px){
  .menu-btn{display:block}
  .nav{
    position:fixed;inset:70px 16px auto;flex-direction:column;gap:4px;
    padding:12px;border-radius:18px;border:1px solid var(--line);
    background:rgba(8,10,16,.94);backdrop-filter:blur(20px);
    transform:translateY(-12px) scale(.98);opacity:0;pointer-events:none;
    transition:.3s var(--ease);
  }
  .nav.open{transform:none;opacity:1;pointer-events:auto}
  .nav a{padding:12px 14px;font-size:15px}
  .nav a.active::after{display:none}
  .view{padding-top:104px}
  .scroll-hint{display:none}
  .contact-row{grid-template-columns:90px 1fr 20px;gap:10px;padding:16px}
  .hero-title{font-size:clamp(34px,10vw,52px)}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
  .js .reveal,.reveal{opacity:1!important;transform:none!important}
}