*{box-sizing:border-box}html,body{margin:0;padding:0;min-height:100%}
body{font-family:"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;background:#0a0a0f;color:rgba(255,255,255,.92);line-height:1.65}
a{color:#9db7ff;text-decoration:none}a:hover{text-decoration:underline}
.bg{position:fixed;inset:0;z-index:0;pointer-events:none}
.bg-gradient{position:absolute;inset:0;background:radial-gradient(ellipse at 50% 0%,rgba(102,126,234,.14),transparent 55%)}
.bg-grid{position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.015) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.015) 1px,transparent 1px);background-size:60px 60px}
.site-header,.main,.site-footer{position:relative;z-index:1}
.site-header{display:flex;align-items:center;gap:20px;padding:16px 28px;border-bottom:1px solid rgba(255,255,255,.06);backdrop-filter:blur(10px)}
.brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;text-decoration:none}
.brand img{border-radius:8px}
.nav{display:flex;gap:14px;flex:1;flex-wrap:wrap}
.nav-link{color:rgba(255,255,255,.7);font-size:14px}
.nav-link.active,.nav-link:hover{color:#fff;text-decoration:none}
.header-cta{margin-left:auto;white-space:nowrap}
.btn-primary,.btn-secondary{display:inline-flex;align-items:center;justify-content:center;padding:10px 18px;border-radius:10px;font-weight:600;text-decoration:none;border:1px solid transparent}
.btn-primary{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff}
.btn-primary:hover{filter:brightness(1.08);text-decoration:none}
.btn-secondary{border-color:rgba(255,255,255,.18);color:#fff;background:rgba(255,255,255,.04)}
.btn-secondary:hover{background:rgba(255,255,255,.08);text-decoration:none}
.main{max-width:960px;margin:0 auto;padding:48px 24px 72px}
.hero{text-align:center;padding:24px 0 40px}
.eyebrow{color:rgba(157,183,255,.9);letter-spacing:.08em;font-size:13px;text-transform:uppercase;margin:0 0 12px}
.hero h1,.doc-hero h1,.doc h1{margin:0 0 14px;font-size:clamp(1.8rem,4vw,2.6rem);line-height:1.25}
.lead{margin:0 auto 22px;max-width:640px;color:rgba(255,255,255,.72);font-size:1.05rem}
.hero-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-bottom:16px}
.tip,.foot-tip,.hint,.meta{color:rgba(255,255,255,.55);font-size:14px}
.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:14px;margin:28px 0}
.feature-card,.step-card{background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08);border-radius:14px;padding:18px}
.feature-card h3,.step-card h3{margin:0 0 8px;font-size:1rem}
.feature-card p,.step-card p{margin:0;color:rgba(255,255,255,.65);font-size:14px}
.formats,.platforms{margin:28px 0;padding:20px;border-radius:14px;background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.06)}
.formats h2,.platforms h2,.doc h2{margin:0 0 10px;font-size:1.15rem}
.doc-hero{text-align:center;margin-bottom:28px}
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:14px}
.step-num{display:inline-block;font-size:12px;color:#9db7ff;margin-bottom:8px;letter-spacing:.06em}
.cta-line{text-align:center;margin-top:28px}
.doc{background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.06);border-radius:16px;padding:28px 24px}
.doc ol,.doc ul{padding-left:1.2em;color:rgba(255,255,255,.78)}
.doc li{margin:8px 0}
.site-footer{text-align:center;padding:28px 16px 40px;color:rgba(255,255,255,.45);font-size:13px;border-top:1px solid rgba(255,255,255,.06)}
.footer-links{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
@media (max-width:720px){
  .site-header{flex-wrap:wrap}
  .header-cta{margin-left:0;width:100%}
  .main{padding:32px 16px 56px}
}