:root{
  --bg:#070812; --bg2:#0d1024; --card:rgba(255,255,255,.055);
  --line:rgba(255,255,255,.12); --text:#f2f3f8; --muted:#a7adc4;
  --violet:#7c6cff; --cyan:#38d6ff; --pink:#ff6ec7; --amber:#ffca6b;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  line-height:1.7;overflow-x:hidden}
a{color:inherit;text-decoration:none}
.wrap{max-width:1080px;margin:0 auto;padding:0 24px}
header{position:fixed;inset:0 0 auto 0;z-index:20;
  backdrop-filter:blur(14px);background:rgba(7,8,18,.65);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{font-weight:800;letter-spacing:.08em}
.logo span{color:var(--cyan)}
.nav a{margin-left:22px;color:var(--muted)}
.nav a:hover{color:var(--text)}
.hero{position:relative;padding:150px 0 70px;overflow:hidden}
#stars{position:absolute;inset:0;width:100%;height:100%;opacity:.7}
.orb{position:absolute;border-radius:50%;filter:blur(70px);opacity:.55;animation:drift 14s ease-in-out infinite alternate}
.orb.v{width:420px;height:420px;background:#6b5cff;left:-80px;top:-40px}
.orb.c{width:360px;height:360px;background:#0ea5c7;right:0;top:120px;animation-delay:-5s}
.orb.p{width:280px;height:280px;background:#ff5ea8;left:45%;bottom:-120px;animation-delay:-9s}
@keyframes drift{from{transform:translate(0,0) scale(1)}to{transform:translate(40px,-30px) scale(1.12)}}
.hero-inner{position:relative}
.eyebrow{display:inline-block;padding:6px 12px;border:1px solid var(--line);border-radius:999px;
  color:var(--muted);font-size:13px;background:rgba(255,255,255,.04)}
h1{font-size:clamp(38px,7vw,72px);line-height:1.15;margin:22px 0 16px;letter-spacing:-.02em}
h1 em{font-style:normal;background:linear-gradient(90deg,var(--cyan),var(--violet),var(--pink));
  -webkit-background-clip:text;background-clip:text;color:transparent}
.lead{color:var(--muted);font-size:18px;max-width:640px}
.btns{margin-top:28px;display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-block;padding:12px 22px;border-radius:999px;font-weight:700;border:1px solid var(--line)}
.btn.primary{background:linear-gradient(90deg,var(--violet),var(--pink));border:0}
.btn.ghost{background:rgba(255,255,255,.05)}
.marquee{margin-top:64px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  padding:14px 0;overflow:hidden;white-space:nowrap;color:var(--muted);letter-spacing:.2em;font-size:13px}
.marquee span{display:inline-block;padding-right:48px;animation:scroll 22s linear infinite}
@keyframes scroll{to{transform:translateX(-50%)}}
section{padding:64px 0}
h2{font-size:30px;margin:0 0 8px}
.sec-sub{color:var(--muted);margin:0 0 28px}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
@media(max-width:820px){.grid{grid-template-columns:1fr}.nav a{margin-left:12px}}
.card{background:var(--card);border:1px solid var(--line);border-radius:20px;padding:22px;
  transition:transform .3s,border-color .3s}
.card:hover{transform:translateY(-5px);border-color:rgba(124,108,255,.6)}
.card .tag{font-size:12px;color:var(--cyan);letter-spacing:.1em}
.card h3{margin:10px 0 8px;line-height:1.4}
.card p{color:var(--muted);font-size:15px;margin:0}
.meta{color:var(--muted);font-size:13px;margin-top:14px}
.demo{height:170px;border-radius:16px;position:relative;overflow:hidden;border:1px solid var(--line);margin-bottom:16px}
.demo.aurora{background:linear-gradient(120deg,#1b1447,#0e3a5c,#7a2a6d);background-size:200% 200%;animation:grad 8s ease infinite}
@keyframes grad{0%,100%{background-position:0% 50%}50%{background-position:100% 50%}}
.demo.orbit{background:radial-gradient(circle at 70% 30%,#1e2a66,#070812 70%)}
.demo.orbit::after{content:"";position:absolute;left:50%;top:50%;width:110px;height:110px;margin:-55px;
  border-radius:50%;background:radial-gradient(circle,#ffd98a,#ff7a3d);box-shadow:0 0 60px #ff7a3d}
.demo.orbit::before{content:"";position:absolute;left:50%;top:50%;width:200px;height:200px;margin:-100px;
  border:1px dashed rgba(255,255,255,.4);border-radius:50%;animation:spin 12s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.demo.glass{background:linear-gradient(135deg,#16224a,#0b1226);display:flex;align-items:center;justify-content:center;gap:10px}
.demo.glass i{display:block;width:70px;height:90px;border-radius:12px;background:rgba(255,255,255,.12);
  border:1px solid rgba(255,255,255,.25);backdrop-filter:blur(6px);transform:rotate(-4deg)}
.demo.glass i:nth-child(2){transform:translateY(12px) rotate(3deg);background:rgba(56,214,255,.18)}
.demo.neon{background:#0a0a14;display:flex;align-items:center;justify-content:center}
.demo.neon b{font-size:28px;letter-spacing:.15em;text-shadow:0 0 18px var(--pink),0 0 42px var(--violet)}
.post{max-width:760px;margin:0 auto;padding:140px 24px 80px}
.post h1{font-size:clamp(30px,5vw,46px)}
.post p{color:#d6d9e8;font-size:17px}
.post .note{background:rgba(255,202,107,.1);border:1px solid rgba(255,202,107,.35);border-radius:14px;padding:14px 18px;color:#ffe3ac}
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s,transform .6s}
.reveal.on{opacity:1;transform:none}
footer{border-top:1px solid var(--line);padding:36px 0;color:var(--muted);font-size:14px}
footer .wrap{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}