:root{--bg:#0d0f1c;--fg:#f3f4fb;--mut:rgba(243,244,251,.68);--line:rgba(255,255,255,.18);--acc:#9aa8ff}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;font:16px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Noto Sans CJK SC",sans-serif;color:var(--fg);background:var(--bg)}
body::before{content:"";position:fixed;inset:0;z-index:-1;background:radial-gradient(900px 500px at 15% -5%,rgba(120,100,255,.35),transparent 60%),radial-gradient(800px 500px at 90% 10%,rgba(236,72,153,.22),transparent 60%),radial-gradient(900px 600px at 50% 110%,rgba(45,212,191,.16),transparent 60%)}
a{color:var(--acc)}
.wrap{max-width:1040px;margin:0 auto;padding:0 24px}
nav{display:flex;align-items:center;justify-content:space-between;padding:20px 0}
.brand{display:flex;align-items:center;gap:10px;font-weight:600;color:var(--fg);text-decoration:none}
.brand img{width:32px;height:32px;border-radius:8px}
nav .r{display:flex;gap:16px;align-items:center}
nav a.link{color:var(--mut);text-decoration:none;font-size:14px}nav a.link:hover{color:var(--fg)}
.lang{display:inline-flex;border:1px solid var(--line);border-radius:999px;overflow:hidden}
.lang button{background:none;border:0;color:var(--mut);padding:5px 12px;font:inherit;font-size:13px;cursor:pointer}
.lang button.on{background:rgba(255,255,255,.16);color:var(--fg)}
.hero{text-align:center;padding:48px 0 24px}
.hero h1{font-size:clamp(34px,6vw,60px);line-height:1.1;margin:0 0 16px;font-weight:700;letter-spacing:-.02em}
.hero p.sub{max-width:640px;margin:0 auto 28px;color:var(--mut);font-size:18px}
.btn{display:inline-block;padding:12px 24px;border-radius:999px;font-weight:600;text-decoration:none;color:#0d0f1c;background:#fff;margin:4px}
.btn.ghost{background:rgba(255,255,255,.1);color:var(--fg);border:1px solid var(--line)}
.shot{border-radius:20px;border:1px solid var(--line);box-shadow:0 30px 80px rgba(0,0,0,.55);width:100%;display:block;background:#000}
.hero .shot{margin-top:40px}
section{padding:64px 0}
h2{font-size:clamp(26px,4vw,38px);margin:0 0 12px;letter-spacing:-.01em}
.lead{color:var(--mut);max-width:620px;margin:0 0 36px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px}
.card{padding:22px;border-radius:20px;border:1px solid var(--line);background:linear-gradient(135deg,rgba(255,255,255,.1),rgba(255,255,255,.03))}
.card h3{margin:0 0 6px;font-size:17px}.card p{margin:0;color:var(--mut);font-size:15px}
.split{display:grid;grid-template-columns:1fr 1.25fr;gap:40px;align-items:center}
.split.rev{grid-template-columns:1.25fr 1fr}.split.rev>div:first-child{order:2}
@media(max-width:800px){.split,.split.rev{grid-template-columns:1fr}.split.rev>div:first-child{order:0}}
.steps{counter-reset:s;list-style:none;padding:0;margin:0;display:grid;gap:12px}
.steps li{counter-increment:s;padding-left:46px;position:relative;color:var(--mut)}
.steps li::before{content:counter(s);position:absolute;left:0;top:0;width:32px;height:32px;border-radius:50%;display:grid;place-items:center;background:rgba(255,255,255,.14);color:var(--fg);font-weight:600}
.steps b{color:var(--fg)}
code{background:rgba(255,255,255,.12);padding:2px 6px;border-radius:6px;font-size:.92em}
footer{border-top:1px solid var(--line);padding:32px 0 48px;color:var(--mut);font-size:14px;text-align:center}
footer a{color:var(--mut)}
[data-l]{display:none}html[lang=en] [data-l=en],html[lang=zh] [data-l=zh]{display:revert}
article{max-width:760px;padding:24px 0 80px}article h1{font-size:34px}article h2{font-size:22px;margin-top:36px}article p,article li{color:var(--mut)}
.brand .tag{font-weight:400;font-size:.8rem;color:var(--muted,#7a8090);margin-left:2px}
@media(max-width:640px){.brand .tag{display:none}}