:root{
  --bg:#f3f5f9; --panel:#ffffff; --ink:#1b2330; --muted:#6b7689;
  --line:#e6eaf1; --brand:#1f6feb; --brand-d:#1559c4; --ok:#1aa260;
  --soft:#eef3fb; --shadow:0 1px 3px rgba(20,30,50,.07),0 8px 24px rgba(20,30,50,.05);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:var(--bg); color:var(--ink);
  font-family:Tahoma,"Segoe UI",Vazirmatn,Arial,sans-serif;
  font-size:15px; line-height:1.85; -webkit-text-size-adjust:100%;
}
a{color:var(--brand); text-decoration:none}
a:hover{color:var(--brand-d)}
.wrap{max-width:1140px; margin:0 auto; padding:0 16px}
h1,h2,h3{line-height:1.5; margin:.2em 0 .5em}
h1{font-size:26px} h2{font-size:21px} h3{font-size:17px}

/* header */
.site-head{background:var(--panel); border-bottom:1px solid var(--line); position:sticky; top:0; z-index:20}
.head-in{display:flex; align-items:center; gap:18px; height:66px}
.brand{display:flex; align-items:center; gap:10px; font-weight:700; font-size:20px; color:var(--ink)}
.brand b{color:var(--brand)}
.logo{flex:0 0 auto; border-radius:10px}
.search{flex:1; display:flex; max-width:520px}
.search input{flex:1; border:1px solid var(--line); border-inline-end:0; border-radius:0 10px 10px 0; padding:10px 14px; font:inherit; background:var(--soft); outline:none}
.search input:focus{border-color:var(--brand); background:#fff}
.search button{border:0; background:var(--brand); color:#fff; padding:0 20px; border-radius:10px 0 0 10px; cursor:pointer; font:inherit}
.search button:hover{background:var(--brand-d)}
.topnav{display:flex; gap:16px}
.topnav a{color:var(--muted); font-weight:600}
.topnav a:hover{color:var(--brand)}

/* category bar */
.catbar{background:#0f1623}
.catbar .wrap{display:flex; flex-wrap:wrap; gap:2px}
.catbar a{color:#cdd6e6; padding:11px 14px; font-size:13.5px; font-weight:600}
.catbar a:hover{background:rgba(255,255,255,.08); color:#fff}

/* hero */
.hero{display:grid; grid-template-columns:1.6fr 1fr; gap:22px; margin:22px 0}
.hero-txt{background:linear-gradient(135deg,#1f6feb,#1559c4); color:#fff; border-radius:16px; padding:26px 28px; box-shadow:var(--shadow)}
.hero-txt h1{color:#fff; margin-top:0}
.hero-txt p{color:#dbe7ff; margin:0 0 18px}
.hero-stats{display:flex; gap:14px; flex-wrap:wrap}
.hero-stats div{background:rgba(255,255,255,.13); border-radius:12px; padding:10px 16px; min-width:120px}
.hero-stats b{display:block; font-size:20px}
.hero-stats span{font-size:12.5px; color:#cfe0ff}
.hero-card{background:var(--panel); border:1px solid var(--line); border-radius:16px; padding:18px 20px; box-shadow:var(--shadow)}
.hero-card h3{margin-top:0}
.toplist{list-style:none; margin:0; padding:0}
.toplist li{display:flex; align-items:center; justify-content:space-between; padding:9px 0; border-bottom:1px dashed var(--line)}
.toplist li:last-child{border-bottom:0}
.toplist a{display:flex; align-items:center; gap:9px; font-weight:600}
.toplist .rk{display:inline-grid; place-items:center; width:24px; height:24px; border-radius:7px; background:var(--soft); color:var(--brand); font-size:13px}
.toplist em{color:var(--muted); font-style:normal; font-size:12.5px}

/* blocks + grid */
.block{margin:26px 0}
.block-head{display:flex; align-items:center; justify-content:space-between; border-inline-start:4px solid var(--brand); padding-inline-start:12px; margin-bottom:14px}
.block-head h2{margin:0}
.more{font-size:13.5px; font-weight:600}
.grid{display:grid; grid-template-columns:repeat(auto-fill,minmax(220px,1fr)); gap:14px}
.card{background:var(--panel); border:1px solid var(--line); border-radius:14px; padding:14px; box-shadow:var(--shadow); transition:transform .12s ease, box-shadow .12s ease}
.card:hover{transform:translateY(-2px); box-shadow:0 6px 20px rgba(20,30,50,.12)}
.card .ic{width:48px; height:48px; border-radius:12px; display:grid; place-items:center; color:#fff; font-weight:700; font-size:18px; margin-bottom:10px}
.card h3{margin:.1em 0 .2em; font-size:15.5px}
.card .meta{color:var(--muted); font-size:12.5px; display:flex; gap:10px; flex-wrap:wrap}
.card .dl{display:inline-flex; margin-top:10px; background:var(--soft); color:var(--brand); border-radius:9px; padding:7px 14px; font-weight:700; font-size:13px}
.card .dl:hover{background:var(--brand); color:#fff}

/* seo + footer */
.seo{background:var(--panel); border:1px solid var(--line); border-radius:16px; padding:20px 24px; margin:26px 0; box-shadow:var(--shadow)}
.seo h2{margin-top:0}
.seo p{color:#3a4658; margin:0 0 12px}
.site-foot{background:#0f1623; color:#aeb8c9; margin-top:30px; padding:26px 0}
.foot-in{display:flex; align-items:center; justify-content:space-between; gap:18px; flex-wrap:wrap}
.foot-in b{color:#fff}
.foot-in p{margin:.2em 0 0; font-size:13px}
.foot-in nav{display:flex; gap:16px}
.foot-in nav a{color:#cdd6e6; font-size:13.5px}
.foot-in small{color:#7b879c; width:100%; border-top:1px solid rgba(255,255,255,.08); padding-top:12px; font-size:12px}

/* article (download pages) */
.crumb{color:var(--muted); font-size:13px; margin:16px 0}
.crumb a{color:var(--muted)}
.article{background:var(--panel); border:1px solid var(--line); border-radius:16px; padding:22px 26px; box-shadow:var(--shadow); margin-bottom:24px}
.article h1{margin-top:0}
.dlbox{display:flex; align-items:center; gap:14px; background:var(--soft); border:1px solid var(--line); border-radius:14px; padding:16px 18px; margin:18px 0}
.dlbox .big{background:var(--ok); color:#fff; border-radius:11px; padding:12px 26px; font-weight:700; font-size:16px}
.specs{width:100%; border-collapse:collapse; margin:14px 0}
.specs td{border-bottom:1px solid var(--line); padding:9px 6px; font-size:14px}
.specs td:first-child{color:var(--muted); width:160px}

@media(max-width:860px){
  .hero{grid-template-columns:1fr}
  .topnav{display:none}
  .head-in{height:auto; padding:10px 0; flex-wrap:wrap}
}