:root {
  --pri: #c62828;
  --pri2: #ff5252;
  --bg: #0a0a0a;
  --bg2: #111111;
  --card: #181818;
  --text: #f0f0f0;
  --text2: #999;
  --acc: #ff3d3d;
  --grad: linear-gradient(135deg, #c62828 0%, #d32f2f 100%);
  --grad2: linear-gradient(135deg, #ff5252, #ff8a80);
  --shadow: 0 4px 24px rgba(198,40,40,.25);
  --radius: 12px;
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:"PingFang SC","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--text);min-height:100vh;overflow-x:hidden}
body::before{content:'';position:fixed;top:0;left:0;width:100%;height:100%;background:radial-gradient(ellipse at 10% 5%, rgba(198,40,40,.15) 0%, transparent 50%),radial-gradient(ellipse at 85% 70%, rgba(255,82,82,.08) 0%, transparent 45%);pointer-events:none;z-index:0}
.container{max-width:1200px;margin:0 auto;padding:0 24px;position:relative;z-index:1}
.nav{display:flex;justify-content:space-between;align-items:center;padding:18px 0;border-bottom:1px solid rgba(255,255,255,.06)}
.logo{display:flex;align-items:center;gap:10px;font-size:22px;font-weight:700;letter-spacing:1px}
.logo .icon{width:40px;height:40px;background:var(--grad);border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:20px;font-weight:900}
.nav-links{display:flex;gap:28px;list-style:none}
.nav-links a{color:var(--text2);text-decoration:none;font-size:14px;transition:color .3s;text-transform:uppercase;letter-spacing:1px}
.nav-links a:hover,.nav-links a.active{color:var(--acc)}
.hero{padding:90px 0 60px;text-align:center}
.hero .badge{display:inline-block;padding:5px 18px;background:rgba(255,82,82,.1);border-radius:4px;font-size:12px;color:var(--pri2);margin-bottom:20px;letter-spacing:3px;text-transform:uppercase}
.hero h1{font-size:clamp(38px,6vw,58px);font-weight:900;margin-bottom:16px;line-height:1.15;text-transform:uppercase;letter-spacing:2px}
.hero h1 .hl{color:var(--acc);position:relative}
.hero h1 .hl::after{content:'';position:absolute;bottom:2px;left:0;width:100%;height:3px;background:var(--grad2)}
.hero p{color:var(--text2);font-size:17px;max-width:550px;margin:0 auto 36px;line-height:1.7}
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 32px;border-radius:4px;font-size:15px;font-weight:600;cursor:pointer;transition:all .3s;text-decoration:none;border:none;text-transform:uppercase;letter-spacing:1px}
.btn-pri{background:var(--grad);color:#fff;box-shadow:0 6px 20px rgba(198,40,40,.3)}
.btn-pri:hover{transform:translateY(-2px);box-shadow:0 10px 30px rgba(198,40,40,.45)}
.btn-out{background:transparent;border:1.5px solid rgba(255,255,255,.15);color:var(--text);margin-left:12px}
.btn-out:hover{border-color:var(--acc);color:var(--acc)}
.features{padding:60px 0 80px}
.features h2{text-align:center;font-size:30px;margin-bottom:48px;font-weight:700;letter-spacing:2px;text-transform:uppercase}
.features h2 span{color:var(--acc)}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:20px}
.card{background:var(--card);border-radius:var(--radius);padding:28px;border:1px solid rgba(255,255,255,.04);transition:all .35s}
.card:hover{transform:translateY(-5px);box-shadow:0 8px 28px rgba(198,40,40,.15);border-color:rgba(198,40,40,.25)}
.card .icon{font-size:28px;margin-bottom:14px}
.card h3{font-size:17px;margin-bottom:8px;font-weight:600}
.card p{color:var(--text2);font-size:13px;line-height:1.7}
.stats{padding:30px 0 80px}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center}
.stat-item{background:var(--card);border-radius:var(--radius);padding:28px 12px;border:1px solid rgba(255,255,255,.04)}
.stat-num{font-size:34px;font-weight:900;color:var(--acc)}
.stat-label{color:var(--text2);font-size:13px;margin-top:6px;text-transform:uppercase;letter-spacing:1px}
.cta{margin:0 0 80px;text-align:center;padding:56px;background:linear-gradient(135deg,#1a0000,#0d0000);border:1px solid rgba(198,40,40,.2);border-radius:var(--radius);position:relative;overflow:hidden}
.cta::before{content:'';position:absolute;top:-40%;right:-10%;width:250px;height:250px;background:radial-gradient(circle,rgba(255,82,82,.1) 0%,transparent 70%);border-radius:50%}
.cta h2{font-size:28px;margin-bottom:10px;position:relative;text-transform:uppercase;letter-spacing:1px}
.cta p{color:var(--text2);margin-bottom:28px;position:relative;font-size:15px}
.cta .btn-pri{font-size:16px;padding:15px 40px;position:relative}
.footer{padding:36px 0;border-top:1px solid rgba(255,255,255,.05);text-align:center;color:var(--text2);font-size:12px;text-transform:uppercase;letter-spacing:1px}
.dl-page{padding:60px 0;text-align:center}
.dl-page h1{font-size:36px;margin-bottom:14px;text-transform:uppercase;letter-spacing:2px}
.dl-page h1 .hl{color:var(--acc)}
.dl-page .sub{color:var(--text2);margin-bottom:40px;font-size:15px}
.dl-box{background:var(--card);border-radius:var(--radius);padding:40px;max-width:520px;margin:0 auto 28px;border:1px solid rgba(255,255,255,.06)}
.dl-box .platform{font-size:36px;margin-bottom:8px}
.dl-box h3{font-size:18px;margin-bottom:4px}
.dl-box .ver{color:var(--text2);font-size:13px;margin-bottom:22px}
.dl-box .size-info{color:var(--text2);font-size:12px;margin-top:10px}
.err-page{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:80vh;text-align:center;padding:40px 20px}
.err-num{font-size:clamp(90px,14vw,150px);font-weight:900;color:var(--acc);line-height:1;letter-spacing:-2px}
.err-msg{font-size:20px;color:var(--text2);margin:16px 0 32px}
@media(max-width:768px){
  .nav-links{display:none}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .cta{padding:36px 20px}
  .hero{padding:50px 0 30px}
}