/* Clash-style static site */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Roboto,Helvetica,Arial,sans-serif;line-height:1.6;color:#e6e9ef;background:#0b0f1a;overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none;transition:color .2s}
ul{list-style:none}
:root{--bg:#0b0f1a;--bg-2:#111827;--card:#141b2d;--border:rgba(255,255,255,.08);--muted:#94a3b8;--text:#e6e9ef;--accent:#ff7a1a;--accent-2:#3b82f6;--radius:14px;--maxw:1200px}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(11,15,26,.85);backdrop-filter:blur(14px);border-bottom:1px solid var(--border)}
.nav{max-width:var(--maxw);margin:0 auto;padding:16px 24px;display:flex;align-items:center;gap:32px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:20px;color:var(--text)}
.brand img{width:34px;height:34px}
.nav-links{display:flex;gap:28px;margin-left:16px}
.nav-links a{color:var(--muted);font-size:15px;font-weight:500}
.nav-links a:hover,.nav-links a.active{color:var(--text)}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:14px}
.lang{color:var(--muted);font-size:14px;border:1px solid var(--border);padding:6px 12px;border-radius:999px}
.lang:hover{color:var(--text);border-color:var(--accent)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 22px;border-radius:999px;font-weight:600;font-size:15px;transition:transform .15s,box-shadow .2s,background .2s;border:1px solid transparent;cursor:pointer;white-space:nowrap}
.btn-primary{background:linear-gradient(135deg,var(--accent),#ff5544);color:#fff;box-shadow:0 6px 20px rgba(255,122,26,.35)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 30px rgba(255,122,26,.5)}
.btn-secondary{background:transparent;color:var(--text);border-color:var(--border)}
.btn-secondary:hover{border-color:var(--accent)}
.btn-lg{padding:14px 30px;font-size:16px}

/* Sections */
main{min-height:70vh}
.section{padding:96px 24px}
.section-inner{max-width:var(--maxw);margin:0 auto}
.eyebrow{display:inline-block;font-size:13px;color:var(--accent);letter-spacing:.12em;text-transform:uppercase;font-weight:600;margin-bottom:14px}
h1,h2,h3,h4{color:#fff;line-height:1.25;font-weight:700}
h1{font-size:clamp(38px,5.5vw,64px);letter-spacing:-.02em}
h2{font-size:clamp(28px,3.6vw,44px);letter-spacing:-.01em;margin-bottom:14px}
h3{font-size:20px;margin-bottom:8px}
p{color:var(--muted);font-size:16px}
.lead{font-size:18px;color:var(--muted);max-width:720px}

/* Hero */
.hero{padding:110px 24px 80px;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:radial-gradient(1200px 500px at 70% 10%,rgba(59,130,246,.18),transparent 60%),radial-gradient(800px 400px at 10% 90%,rgba(255,122,26,.14),transparent 60%);pointer-events:none}
.hero-grid{max-width:var(--maxw);margin:0 auto;display:grid;grid-template-columns:1.1fr 1fr;gap:56px;align-items:center;position:relative}
.hero h1 span{background:linear-gradient(135deg,var(--accent),#ff5544);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lead{margin:22px 0 32px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.hero-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:48px;max-width:520px}
.stat .n{font-size:28px;font-weight:800;color:#fff}
.stat .l{color:var(--muted);font-size:14px;margin-top:2px}
.hero-visual{position:relative;aspect-ratio:4/3;border-radius:24px;overflow:hidden;border:1px solid var(--border);background:var(--card)}
.hero-visual img{width:100%;height:100%;object-fit:cover}
.platform-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.platform-tag{padding:6px 14px;border-radius:999px;background:var(--card);border:1px solid var(--border);font-size:13px;color:var(--muted)}

/* Cards */
.grid{display:grid;gap:22px}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:28px;transition:transform .2s,border-color .2s}
.card:hover{transform:translateY(-4px);border-color:rgba(255,122,26,.35)}
.card .icon{width:44px;height:44px;border-radius:12px;background:linear-gradient(135deg,rgba(255,122,26,.15),rgba(59,130,246,.1));display:flex;align-items:center;justify-content:center;margin-bottom:16px;color:var(--accent);font-size:22px;font-weight:700}
.section-head{text-align:center;margin-bottom:56px}
.section-head p{max-width:640px;margin:0 auto}

/* Download cards */
.dl-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:28px;display:flex;gap:20px;align-items:flex-start}
.dl-card img{width:64px;height:64px;flex-shrink:0;background:#0b0f1a;border-radius:14px;padding:8px}
.dl-body{flex:1}
.dl-meta{color:var(--muted);font-size:14px;margin:4px 0 10px}
.badge{display:inline-block;padding:3px 10px;font-size:12px;border-radius:999px;background:rgba(255,122,26,.14);color:var(--accent);font-weight:600;margin-bottom:10px}
.dl-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
.dl-btn{padding:8px 14px;border-radius:8px;background:#1e293b;border:1px solid var(--border);color:var(--text);font-size:13px;font-weight:500}
.dl-btn:hover{background:var(--accent);border-color:var(--accent)}

/* Tabs (CSS-only) */
.tabs{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;margin-bottom:40px}
.tab-link{padding:10px 22px;border-radius:999px;background:var(--card);border:1px solid var(--border);color:var(--muted);font-weight:500;font-size:14px}
.tab-link:hover{color:var(--text);border-color:var(--accent)}

/* Steps */
.steps{display:grid;gap:20px;grid-template-columns:repeat(3,1fr)}
.step{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:28px;position:relative}
.step-num{width:34px;height:34px;border-radius:50%;background:linear-gradient(135deg,var(--accent),#ff5544);color:#fff;font-weight:700;display:flex;align-items:center;justify-content:center;margin-bottom:14px}

/* FAQ */
.faq-list{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
details.faq{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:20px 24px}
details.faq summary{list-style:none;cursor:pointer;font-weight:600;color:#fff;display:flex;justify-content:space-between;align-items:center;font-size:16px}
details.faq summary::-webkit-details-marker{display:none}
details.faq summary::after{content:"+";font-size:22px;color:var(--accent);transition:transform .2s}
details.faq[open] summary::after{content:"−"}
details.faq p{margin-top:12px;color:var(--muted)}

/* Tutorial */
.tut-block{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:32px;margin-bottom:24px}
.tut-block h3{color:#fff;font-size:22px;margin-bottom:18px}
.tut-step{display:flex;gap:16px;padding:16px 0;border-top:1px solid var(--border)}
.tut-step:first-of-type{border-top:none}
.tut-step .n{flex-shrink:0;width:30px;height:30px;border-radius:50%;background:var(--accent);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px}
.tut-step .b h4{color:#fff;font-size:16px;margin-bottom:6px}
.callout{background:rgba(59,130,246,.08);border-left:3px solid var(--accent-2);padding:14px 18px;border-radius:8px;margin:16px 0;color:var(--muted);font-size:14px}
pre{background:#05070d;border:1px solid var(--border);border-radius:10px;padding:18px;overflow:auto;font-size:13px;color:#cbd5e1;font-family:"SF Mono",Menlo,Consolas,monospace;line-height:1.6;margin:12px 0}
code{font-family:"SF Mono",Menlo,Consolas,monospace;background:rgba(255,255,255,.06);padding:2px 6px;border-radius:4px;font-size:.9em;color:#fbbf77}
pre code{background:none;padding:0;color:inherit}

/* Feature big */
.feature-hero{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;margin-bottom:80px}
.feature-hero img{border-radius:var(--radius);border:1px solid var(--border)}

/* CTA */
.cta{background:linear-gradient(135deg,rgba(255,122,26,.15),rgba(59,130,246,.15));border:1px solid var(--border);border-radius:24px;padding:64px 40px;text-align:center;margin:24px}
.cta h2{margin-bottom:14px}
.cta .btn{margin-top:22px}

/* Footer */
.site-footer{border-top:1px solid var(--border);padding:48px 24px 32px;background:#080b13}
.footer-inner{max-width:var(--maxw);margin:0 auto;display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px}
.footer-inner h4{color:#fff;font-size:14px;text-transform:uppercase;letter-spacing:.08em;margin-bottom:14px}
.footer-inner a{display:block;padding:6px 0;color:var(--muted);font-size:14px}
.footer-inner a:hover{color:var(--accent)}
.footer-inner p{font-size:14px}
.footer-bottom{max-width:var(--maxw);margin:32px auto 0;padding-top:20px;border-top:1px solid var(--border);text-align:center;color:var(--muted);font-size:13px}

/* Responsive */
@media (max-width:900px){
  .hero-grid,.feature-hero{grid-template-columns:1fr}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3,.steps{grid-template-columns:1fr}
  .grid-2{grid-template-columns:1fr}
  .nav-links{display:none}
  .footer-inner{grid-template-columns:1fr 1fr}
  .section{padding:64px 20px}
  .hero{padding:60px 20px}
  .hero-stats{grid-template-columns:repeat(3,1fr);gap:14px}
}
@media (max-width:520px){
  .footer-inner{grid-template-columns:1fr}
  .dl-card{flex-direction:column}
}