:root{
  --bg:#f6f8fb; --panel:#ffffff; --panel2:#eef2f8; --line:#dfe6f0;
  --ink:#15202e; --muted:#5d6b7e; --green:#10b981; --teal:#0ea5b7; --navy:#0f2a43; --red:#ef4444;
  --radius:14px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"Hiragino Sans","Yu Gothic UI","Noto Sans JP",system-ui,sans-serif;background:var(--bg);color:var(--ink);line-height:1.8;font-size:16px}
.wrap{max-width:1140px;margin:0 auto;padding:0 22px}
a{color:var(--teal);text-decoration:none}
a:hover{text-decoration:underline}
header.site{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.95);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.top{display:flex;align-items:center;gap:16px;height:66px}
.logo{display:flex;align-items:center;gap:9px}
.logo-i{width:38px;height:38px;border-radius:11px;background:linear-gradient(135deg,var(--green),var(--teal));color:#fff;display:grid;place-items:center;font-weight:900;font-size:14px;letter-spacing:-.5px}
.logo .word{font-weight:800;font-size:21px;letter-spacing:.2px}
.nav-toggle{display:none;background:none;border:1px solid var(--line);color:var(--ink);font-size:20px;width:42px;height:42px;border-radius:9px;cursor:pointer}
nav.main{display:flex;align-items:center;gap:2px;margin-left:auto;flex-wrap:wrap}
nav.main a{color:var(--muted);padding:8px 10px;border-radius:9px;font-size:14px;font-weight:600}
nav.main a:hover{color:var(--ink);background:var(--panel2);text-decoration:none}
nav.main a.active{color:#fff;background:linear-gradient(120deg,var(--green),var(--teal))}
.btn{display:inline-block;background:linear-gradient(120deg,var(--green),var(--teal));color:#fff;padding:12px 22px;border-radius:11px;font-weight:700;transition:transform .12s}
.btn:hover{text-decoration:none;transform:translateY(-2px)}
.btn.sm{background:linear-gradient(120deg,var(--green),var(--teal));color:#fff;padding:7px 15px;font-size:13px}
.btn.ghost{background:transparent;border:1px solid var(--line);color:var(--ink)}
/* hero */
.hero{padding:72px 0 54px;background:linear-gradient(180deg,#e7fbf6,transparent 65%),radial-gradient(800px 340px at 90% 0%,rgba(14,165,183,.14),transparent 60%)}
.hero .split{display:grid;grid-template-columns:1.25fr .75fr;gap:40px;align-items:center}
.eyebrow{display:inline-block;background:rgba(16,185,129,.12);color:var(--green);font-weight:800;font-size:13px;letter-spacing:.12em;padding:5px 13px;border-radius:999px;margin-bottom:14px}
.hero h1{font-size:46px;line-height:1.14;font-weight:900;letter-spacing:-.5px;margin-bottom:16px}
.hero .sub{color:var(--muted);font-size:16.5px;max-width:58ch;margin-bottom:24px}
.cta-row{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:24px}
.chips{display:flex;flex-wrap:wrap;gap:9px}
.chips span{background:#fff;border:1px solid var(--line);color:var(--ink);font-size:13px;font-weight:600;padding:6px 13px;border-radius:999px}
.scan{background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px;box-shadow:0 20px 50px rgba(15,42,67,.12);position:relative;overflow:hidden}
.scan-line{position:absolute;left:0;right:0;top:0;height:3px;background:linear-gradient(90deg,var(--green),var(--teal));animation:scan 3s ease-in-out infinite}
@keyframes scan{0%,100%{top:0}50%{top:calc(100% - 3px)}}
.scan-text{font-size:14px;color:var(--muted);line-height:1.8;min-height:120px;background:#f8fafc;border:1px dashed var(--line);border-radius:10px;padding:14px;margin-top:8px}
.scan-text .ai{background:var(--red);color:#fff;font-size:11px;padding:2px 8px;border-radius:6px;margin-left:6px}
.scan-meter{height:12px;background:var(--panel2);border-radius:999px;margin:16px 0 8px;overflow:hidden}
.scan-meter span{display:block;height:100%;background:linear-gradient(90deg,#f59e0b,var(--red));border-radius:999px}
.scan-rate{font-weight:800;color:var(--red);font-size:14px}
/* blk */
.blk{padding:50px 0}
.blk.alt{background:var(--panel2)}
h2.sec{font-size:26px;font-weight:800;color:var(--navy);margin-bottom:8px}
p.sec-sub{color:var(--muted);margin-bottom:26px}
.grid{display:grid;gap:16px}
.g3{grid-template-columns:repeat(3,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.card h3{font-size:17px;margin-bottom:8px;color:var(--navy)}
.card p{color:var(--muted);font-size:14.5px}
.note-p{color:var(--muted);font-size:14px;margin-top:18px;border-left:3px solid var(--teal);padding-left:12px}
/* steps-mini */
.steps-mini{display:grid;gap:12px}
.steps-mini div{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 16px;display:flex;align-items:center;gap:12px;font-weight:600;color:var(--ink)}
.steps-mini span{flex:none;width:30px;height:30px;border-radius:50%;background:linear-gradient(135deg,var(--green),var(--teal));color:#fff;display:grid;place-items:center;font-size:14px;font-weight:800}
/* pagehead */
.pagehead{padding:54px 0 28px;background:linear-gradient(180deg,#e7fbf6,transparent 60%)}
.pagehead h1{font-size:34px;font-weight:900;color:var(--navy);margin:8px 0 10px}
.pagehead .sub{color:var(--muted);max-width:70ch}
.crumb{color:var(--muted);font-size:13px}
/* qa */
.qa{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px 22px;margin-bottom:14px}
.qa h3{font-size:16.5px;margin-bottom:6px;color:var(--navy)}
.qa p{color:var(--muted);font-size:14.5px}
footer.site{border-top:1px solid var(--line);padding:30px 0 40px;background:#fff}
.foot-brand{font-weight:800;color:var(--navy);margin-bottom:8px}
.foot-links{color:var(--muted);font-size:13.5px;margin-bottom:8px}
.foot-links a{color:var(--muted)}
.foot-note{color:#98a3b5;font-size:13px;max-width:72ch}
.foot-copy{color:#b3bdcc;font-size:12.5px;margin-top:8px}
@media(max-width:940px){
  .g3{grid-template-columns:repeat(2,1fr)}
  .hero .split{grid-template-columns:1fr}
  .scan{max-width:480px}
  .nav-toggle{display:block;margin-left:auto}
  nav.main{position:fixed;top:66px;right:0;width:min(78%,300px);height:calc(100vh - 66px);background:#fff;flex-direction:column;align-items:flex-start;padding:16px;gap:4px;display:none;border-left:1px solid var(--line);z-index:60}
  nav.main.open{display:flex}
  nav.main a{width:100%}
}
@media(max-width:560px){
  .g3,.g2{grid-template-columns:1fr}
  .hero h1{font-size:34px}
  .pagehead h1{font-size:26px}
}