:root{
  --ink:#17202e;--mut:#5b6b80;--bg:#eef2f8;--card:#ffffff;
  --brand:#1e8cff;--brand2:#0b6fe0;--accent:#00c8a0;--line:#dce5f2;
  --mybubble:#1e8cff;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:"Hiragino Kaku Gothic ProN",Meiryo,"Helvetica Neue",Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.75}
a{color:var(--brand2);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
header.site{background:#0d2b52;color:#fff;position:sticky;top:0;z-index:50}
.top{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
.logo{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:21px}
.logo:hover{text-decoration:none}
.mark{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,var(--brand),var(--accent));color:#fff;font-weight:900}
.nav-toggle{display:none;background:none;border:none;color:#fff;font-size:24px;cursor:pointer}
nav.main{display:flex;align-items:center;gap:4px;flex-wrap:wrap}
nav.main a{color:#cddff5;padding:8px 11px;border-radius:8px;font-size:14px}
nav.main a.active{color:#fff;background:var(--brand)}
nav.main a:hover{text-decoration:none;background:rgba(255,255,255,.1)}
.btn{display:inline-block;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;font-weight:700;padding:12px 22px;border-radius:9px}
.btn:hover{text-decoration:none;filter:brightness(1.06)}
.btn.sm{padding:8px 14px;font-size:13px;background:var(--accent);color:#004d3d}
.btn.ghost{background:transparent;border:2px solid var(--brand2);color:var(--brand2)}
.hero{background:linear-gradient(160deg,#0d2b52,#0b4a8f);color:#fff;padding:80px 0 88px;position:relative}
.hero:after{content:"💬";position:absolute;right:6%;top:40px;font-size:110px;opacity:.12}
.eyebrow{color:var(--accent);font-weight:700;letter-spacing:.14em;font-size:13px;text-transform:uppercase;margin:0 0 14px}
.hero h1{font-size:clamp(2rem,5vw,3.2rem);margin:0 0 16px;line-height:1.2}
.hero .sub{max-width:720px;color:#d4e6fa;font-size:16px;margin:0 0 26px}
.cta-row{display:flex;gap:14px;flex-wrap:wrap}
.blk{padding:60px 0}
.blk.alt{background:#e3ecf8}
h2.sec{font-size:clamp(1.4rem,3vw,1.9rem);margin:0 0 8px;color:var(--ink)}
.sec-sub{color:var(--mut);margin:0 0 28px}
.grid{display:grid;gap:20px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:24px;box-shadow:0 2px 12px rgba(13,43,82,.05)}
.card h3{margin:0 0 10px;font-size:1.12rem;color:var(--brand2)}
.card p{margin:0;color:var(--mut);font-size:14.5px}
.split{display:grid;grid-template-columns:1.4fr 1fr;gap:36px;align-items:center}
.panel{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px 24px}
.ph-line{display:flex;justify-content:space-between;gap:16px;padding:11px 0;border-bottom:1px dashed var(--line);font-size:14px}
.ph-line:last-child{border-bottom:none}
.ph-line b{color:var(--brand2)}
.ph-line span{color:var(--mut);text-align:right}
.note{background:#e0f7f0;border:1px solid #a9e8d4;border-radius:10px;padding:14px 16px;color:#0d6a52;font-size:14px;margin-top:26px}
.pagehead{background:linear-gradient(160deg,#0d2b52,#0b4a8f);color:#fff;padding:56px 0}
.pagehead h1{font-size:clamp(1.7rem,4vw,2.4rem);margin:0 0 12px}
.pagehead .sub{color:#d4e6fa;max-width:760px;margin:0}
.qa{background:#fff;border:1px solid var(--line);border-left:5px solid var(--brand);border-radius:12px;padding:20px 24px;margin-bottom:16px}
.qa h3{margin:0 0 8px;color:var(--brand2);font-size:1.05rem}
.qa p{margin:0;color:var(--mut);font-size:15px}
footer.site{background:#0d2b52;color:#b7cfea;padding:36px 0;font-size:13px}
footer.site p{margin:6px 0}
@media(max-width:860px){
  .nav-toggle{display:block}
  nav.main{display:none;flex-direction:column;position:absolute;top:64px;left:0;right:0;background:#0d2b52;padding:12px}
  nav.main.open{display:flex}
  nav.main a{padding:12px}
  .g2,.g3{grid-template-columns:1fr}
  .split{grid-template-columns:1fr}
  .hero,.pagehead{padding:52px 0}
  .blk{padding:42px 0}
}