/* ios-toduesk.com.cn — Clean Dark Design */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&display=swap');

:root{
  --bg:#080c14; --card:#0f1522; --card-h:#141c2e;
  --accent:#7c5cfc; --accent2:#4dd9ff; --accent3:#22d3a0;
  --text:#e2e8f0; --dim:#8892a8; --muted:#556078;
  --border:rgba(124,92,252,0.12); --bl:rgba(255,255,255,0.05);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:'Inter',system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--text);line-height:1.7;overflow-x:hidden}
body::before{content:'';position:fixed;inset:0;z-index:-1;pointer-events:none;
  background-image:radial-gradient(rgba(124,92,252,0.06) 1px,transparent 1px);
  background-size:32px 32px;
  mask-image:radial-gradient(ellipse 80% 60% at 50% 0%,#000 40%,transparent 70%)}
header{position:sticky;top:0;z-index:999;background:rgba(8,12,20,0.85);backdrop-filter:blur(20px);border-bottom:1px solid var(--bl)}
.nav{max-width:1200px;margin:0 auto;padding:0 28px;display:flex;align-items:center;justify-content:space-between;height:72px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;color:#fff;text-decoration:none}
.logo img{height:36px;width:auto}
.nav-r{display:flex;align-items:center;gap:28px}
.nav-r a{color:var(--dim);text-decoration:none;font-size:14px;font-weight:500;transition:color .2s}
.nav-r a:hover{color:#fff}
.btn-dl{display:inline-block;background:linear-gradient(135deg,var(--accent),#8b5cf6);color:#fff!important;padding:10px 26px;border-radius:50px;font-weight:600!important}
.hero{padding:80px 0 60px}
.hero-inner{max-width:1200px;margin:0 auto;padding:0 28px;display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.hero-text h1{font-size:52px;font-weight:900;line-height:1.15;margin-bottom:20px;letter-spacing:-1px}
.grad{background:linear-gradient(135deg,var(--accent2),var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.hero-text p{font-size:17px;color:var(--dim);line-height:1.8;margin-bottom:32px;max-width:500px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.btn-p{display:inline-flex;align-items:center;gap:6px;background:linear-gradient(135deg,var(--accent),#8b5cf6);color:#fff;padding:15px 32px;border-radius:50px;font-weight:700;font-size:15px;text-decoration:none;transition:all .3s;box-shadow:0 4px 20px rgba(124,92,252,.3)}
.btn-p:hover{transform:translateY(-2px);box-shadow:0 8px 30px rgba(124,92,252,.45)}
.btn-s{display:inline-flex;align-items:center;background:var(--card);color:#fff;padding:15px 32px;border-radius:50px;font-weight:600;font-size:15px;text-decoration:none;border:1px solid var(--border);transition:all .3s}
.btn-s:hover{border-color:var(--accent);background:var(--card-h)}
.hero-img img{width:100%;border-radius:16px;box-shadow:0 8px 40px rgba(0,0,0,.5)}
.features{padding:80px 0}
.feat-title{text-align:center;margin-bottom:50px}
.feat-title h2{font-size:36px;font-weight:800}
.feat-grid{max-width:1100px;margin:0 auto;padding:0 28px;display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.feat{background:var(--card);border:1px solid var(--bl);border-radius:16px;padding:32px 24px;text-align:center;transition:all .3s;position:relative;overflow:hidden}
.feat::before{content:'';position:absolute;top:0;left:0;right:0;height:2px;opacity:0;transition:opacity .3s}
.feat:hover{transform:translateY(-4px);border-color:var(--border);box-shadow:0 8px 30px rgba(0,0,0,.3)}
.feat:hover::before{opacity:1}
.feat-icon{width:52px;height:52px;border-radius:14px;display:flex;align-items:center;justify-content:center;margin:0 auto 16px}
.feat-icon svg{width:24px;height:24px}
.i1{background:rgba(124,92,252,.12);color:#a78bfa}
.i2{background:rgba(34,211,160,.12);color:var(--accent3)}
.i3{background:rgba(77,217,255,.12);color:var(--accent2)}
.i4{background:rgba(251,191,36,.12);color:#fbbf24}
.feat h3{font-size:16px;font-weight:700;margin-bottom:10px;color:#fff}
.feat p{font-size:14px;color:var(--dim);line-height:1.6}
.cta{text-align:center;padding:80px 0}
.cta h2{font-size:34px;font-weight:800;margin-bottom:12px}
.cta p{color:var(--dim);font-size:16px;margin-bottom:28px}
.cta .btn-p{display:inline-flex;font-size:16px;padding:16px 40px}
footer{border-top:1px solid var(--bl);padding:32px 0;margin-top:40px}
.foot-inner{max-width:1200px;margin:0 auto;padding:0 28px;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:16px}
.foot-brand{display:flex;align-items:center;gap:8px;font-weight:700;color:#fff}
.foot-brand img{height:24px;width:auto}
.foot-links{display:flex;gap:24px}
.foot-links a{color:var(--dim);text-decoration:none;font-size:13px;transition:color .2s}
.foot-links a:hover{color:var(--accent2)}
.copy{font-size:13px;color:var(--muted)}
.sub-page{padding:100px 0 60px}
.sub-page h1{font-size:42px;font-weight:800;text-align:center;margin-bottom:40px}
.dl-grid{max-width:900px;margin:0 auto;display:grid;grid-template-columns:1fr 1fr 1fr;gap:16px;padding:0 28px}
.dl-card{background:var(--card);border:1px solid var(--bl);border-radius:16px;padding:32px 20px;text-align:center;transition:all .3s}
.dl-card:hover{border-color:var(--border);transform:translateY(-2px)}
.dl-card .dl-icon{width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;margin:0 auto 14px;background:rgba(124,92,252,.12)}
.dl-card .dl-icon svg{width:22px;height:22px;color:#a78bfa}
.dl-card h3{font-size:16px;font-weight:700;margin-bottom:6px}
.dl-card .ver{font-size:12px;color:var(--dim);margin-bottom:18px}
.dl-card .dl-btn{display:inline-block;background:linear-gradient(135deg,var(--accent),#8b5cf6);color:#fff;padding:10px 24px;border-radius:50px;text-decoration:none;font-size:14px;font-weight:600;transition:all .3s}
.dl-card .dl-btn:hover{box-shadow:0 4px 16px rgba(124,92,252,.4)}
.faq-list{max-width:700px;margin:0 auto;padding:0 28px}
.faq-item{background:var(--card);border:1px solid var(--bl);border-radius:14px;padding:24px;margin-bottom:10px;transition:all .3s}
.faq-item:hover{border-color:var(--border)}
.faq-item h3{font-size:16px;font-weight:700;color:var(--accent2);margin-bottom:8px}
.faq-item p{font-size:14px;color:var(--dim);line-height:1.7}
.notfound{text-align:center;padding:160px 28px 80px}
.notfound .nf-code{font-size:140px;font-weight:900;background:linear-gradient(135deg,var(--accent),var(--accent2));-webkit-background-clip:text;-webkit-text-fill-color:transparent;line-height:1;opacity:.7}
.notfound h1{font-size:28px;color:#fff;margin:16px 0 8px}
.notfound p{color:var(--dim);margin-bottom:28px}
.sitemap-page{max-width:500px;margin:0 auto;padding:0 28px}
.sitemap-page a{display:block;padding:10px 16px;color:var(--dim);text-decoration:none;border-radius:8px;transition:all .2s}
.sitemap-page a:hover{background:var(--card);color:var(--accent2)}
@media(max-width:768px){
  .hero-inner{grid-template-columns:1fr;text-align:center}.hero-text p{margin-left:auto;margin-right:auto}.hero-cta{justify-content:center}
  .hero-text h1{font-size:36px}.feat-grid{grid-template-columns:1fr 1fr}.dl-grid{grid-template-columns:1fr 1fr}.feat-title h2{font-size:28px}
}
@media(max-width:480px){
  .feat-grid{grid-template-columns:1fr}.dl-grid{grid-template-columns:1fr}.nav-r{gap:14px}.nav-r a{font-size:13px}
}