:root{
  --bg:#ffffff;
  --text:#0e1621;
  --muted:#5c6778;
  --line:#e6ecf5;
  --primary:#0b5fff;
  --primary2:#12a8ff;
  --shadow:0 16px 40px rgba(15,25,40,.10);
  --radius:20px;
  --max:1180px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Noto Sans JP",Arial,sans-serif}
a{text-decoration:none;color:inherit}
.container{max-width:var(--max);margin:0 auto;padding:0 24px}
.topbar{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.header{display:flex;justify-content:space-between;align-items:center;gap:18px;padding:14px 0}
.brand img{height:44px;width:auto;display:block}
.nav{display:flex;align-items:center;gap:18px}
.nav a{font-weight:800;color:var(--muted);padding:10px 8px;border-radius:12px}
.nav a:hover,.nav a.active{color:var(--text);background:#f4f7fb}
.lang{display:flex;gap:8px}
.lang button{border:1px solid var(--line);background:#fff;border-radius:12px;padding:8px 10px;font-weight:800;color:var(--muted);cursor:pointer}
.lang button.active{border-color:rgba(11,95,255,.30);box-shadow:0 0 0 4px rgba(11,95,255,.08);color:var(--text)}
.hero{position:relative;overflow:hidden}
.hero .bg{height:540px;background:url('assets/hero-banner.png') center/cover no-repeat}
.hero .overlay{position:absolute;inset:0;background:linear-gradient(90deg,rgba(5,11,22,.82),rgba(5,11,22,.56) 50%,rgba(5,11,22,.12))}
.hero .content{position:absolute;inset:0;display:flex;align-items:center}
.kicker{color:#bfdbff;letter-spacing:.09em;text-transform:uppercase;font-size:12px;font-weight:900}
.hero h1{font-size:46px;line-height:1.08;margin:12px 0 14px;color:#fff;font-weight:950;letter-spacing:-.02em;max-width:760px}
.hero p{margin:0 0 22px;color:rgba(255,255,255,.84);font-size:18px;line-height:1.75;max-width:700px}
.actions{display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 16px;border-radius:14px;font-weight:900}
.btn.primary{background:linear-gradient(90deg,var(--primary),var(--primary2));color:#fff;box-shadow:0 16px 32px rgba(11,95,255,.28)}
.btn.secondary{background:rgba(255,255,255,.10);color:#fff;border:1px solid rgba(255,255,255,.18)}
.section{padding:58px 0}
.section h2{margin:0 0 12px;font-size:30px;font-weight:950;letter-spacing:-.01em}
.sub{margin:0 0 20px;color:var(--muted);line-height:1.8}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
.card img{width:100%;height:170px;object-fit:cover;display:block}
.card .pad{padding:18px}
.card h3{margin:0 0 8px;font-size:17px;font-weight:950}
.card p{margin:0;color:var(--muted);line-height:1.7}
.grid2{display:grid;grid-template-columns:1.2fr .8fr;gap:18px;align-items:start}
.box{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px}
.kv{display:flex;flex-direction:column;gap:10px;color:var(--muted);line-height:1.75}
.kv b{color:var(--text)}
.list{display:grid;gap:12px}
.item{background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);padding:16px}
.item .t{font-weight:950;margin-bottom:6px}
.item .d{color:var(--muted);line-height:1.75}
.footer{border-top:1px solid var(--line);padding:22px 0;color:var(--muted);font-size:13px}
.video-link{display:inline-flex;align-items:center;gap:8px;color:var(--primary);font-weight:900}
@media (max-width: 980px){
  .nav{display:none}
  .hero .bg{height:470px}
  .hero h1{font-size:36px}
  .cards,.grid2{grid-template-columns:1fr}
}