:root{--ink:#111827;--soft:#4B5563;--line:#E5E7EB;--bg:#F8FAFC;--card:#fff;--acc:#2563EB}
*{box-sizing:border-box}body{margin:0;font-family:"Segoe UI",system-ui,-apple-system,Roboto,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.6}
a{color:var(--acc)}.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
header{background:#fff;border-bottom:1px solid var(--line)}header .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:inline-flex;align-items:center;text-decoration:none}.logo img{height:44px;width:auto;display:block;filter:drop-shadow(0 1px 2px rgba(0,0,0,.25))}@media(max-width:640px){.logo img{height:30px}}
nav a{margin-left:18px;text-decoration:none;color:var(--soft);font-weight:600}nav a:hover{color:var(--acc)}
.hero{padding:64px 0 40px;text-align:center}.hero h1{font-size:clamp(30px,5vw,48px);margin:0 0 12px;letter-spacing:-.02em}.hero p{color:var(--soft);font-size:18px;max-width:700px;margin:0 auto}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:18px;margin:30px 0 50px}
.card{display:block;background:var(--card);border:1px solid var(--line);border-radius:16px;padding:22px;text-decoration:none;color:var(--ink);transition:transform .15s,box-shadow .15s;border-top:5px solid var(--c)}
.card:hover{transform:translateY(-3px);box-shadow:0 14px 30px rgba(17,24,39,.08)}.card h2{margin:4px 0 6px;font-size:21px}.card p{color:var(--soft);margin:0 0 10px}.card .go{font-weight:700;color:var(--c)}
.card small{text-transform:uppercase;letter-spacing:.08em;font-weight:700;color:var(--c);font-size:12px}
section.text{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:40px 0}section.text h2{margin-top:0}
details{border:1px solid var(--line);border-radius:12px;padding:12px 16px;margin:10px 0;background:#fff}summary{font-weight:700;cursor:pointer}
.page{padding:40px 0 60px}.page h1{font-size:34px;margin-top:0}
footer{padding:30px 0;color:var(--soft);font-size:14px}footer a{color:var(--soft);margin-right:14px}
@media(max-width:640px){nav a{margin-left:10px;font-size:14px}}