/* ========== Base ========= */
:root{
  --brand-50:#f2f7ff;
  --brand-100:#e6f0ff;
  --brand-200:#cfe2ff;
  --brand-300:#a7c8ff;
  --brand-400:#7eb1ff;
  --brand-500:#4a90ff;
  --brand-600:#2f6ee5;
  --brand-700:#214fb0;
  --brand-800:#1b3f8c;
  --brand-900:#162f66;

  --text:#1f2937;
  --muted:#6b7280;
  --bg:#ffffff;
  --section:#fafbff;
  --card:#ffffff;
  --shadow: 0 10px 25px rgba(0,0,0,.08);
  --radius: 16px;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans JP", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  line-height:1.7;color:var(--text);background:var(--bg);
  -webkit-font-smoothing:antialiased; text-rendering:optimizeLegibility;
}
a{color:var(--brand-700);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;height:auto;display:block}

.container{width:min(1100px, 92vw);margin-inline:auto}

/* Header */
.site-header{position:sticky; top:0; z-index:50; background:rgba(255,255,255,.85); backdrop-filter:saturate(160%) blur(12px); border-bottom:1px solid #e5e7eb}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:12px 0}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;color:inherit}
.logo:hover{text-decoration:none}
.logo-mark{width:36px;height:36px}
.logo-mark.small{width:28px;height:28px}
.logo-text{font-size:18px}

.nav-toggle{display:none;border:1px solid #e5e7eb;border-radius:10px;padding:8px 12px;background:white}
.nav-list{display:flex;gap:18px;list-style:none;margin:0;padding:0;align-items:center}
.nav-list a{padding:8px 10px;border-radius:10px}
.nav-list a:hover{background:var(--brand-50);text-decoration:none}
.btn{display:inline-block;border-radius:999px;padding:10px 18px;border:1px solid transparent;box-shadow:var(--shadow);transition:transform .05s ease}
.btn:hover{transform:translateY(-1px);text-decoration:none}
.btn-sm{padding:8px 14px;box-shadow:none}
.btn-primary{background:var(--brand-600);color:white}
.btn-secondary{background:white;color:var(--brand-700);border-color:#d1d5db}

/* Hero */
.hero{background:linear-gradient(120deg,var(--brand-50),#fff); padding:56px 0 40px; border-bottom:1px solid #eef2ff}
.hero-inner{display:grid;grid-template-columns:1.1fr .9fr;gap:32px;align-items:center}
.hero h1{font-size:clamp(28px, 4.6vw, 46px);line-height:1.2;margin:0 0 12px}
.hero p{color:var(--muted);margin:0 0 22px}
.hero .cta{display:flex;gap:12px;flex-wrap:wrap}

.hero-card{background:var(--card); border-radius:var(--radius); padding:18px; box-shadow:var(--shadow); border:1px solid #e5e7eb}
.hero-card h3{margin:0 0 8px;font-size:18px}
.hero-kpis{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:12px}
.kpi{background:var(--section);border-radius:12px;padding:12px;text-align:center;border:1px solid #eef2ff}
.kpi strong{display:block;font-size:18px}
.kpi span{color:var(--muted);font-size:12px}

/* Services */
.section{padding:48px 0;background:var(--section)}
.section .title{margin:0 0 10px;font-size:26px}
.section .lead{margin:0 0 28px;color:var(--muted)}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card{background:var(--card);border-radius:var(--radius); padding:22px; box-shadow:var(--shadow); border:1px solid #e5e7eb}
.card h3{margin:10px 0;font-size:20px}
.card p{margin:0;color:#374151}
.card .icon{width:40px;height:40px;color:var(--brand-600)}

/* Links */
.links{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.link-card{display:flex;align-items:center;gap:14px;background:white;border:1px solid #e5e7eb;border-radius:14px;padding:14px;box-shadow:var(--shadow)}
.link-card strong{font-size:16px}
.link-card small{color:var(--muted)}

/* CTA band */
.cta-band{padding:30px 0;background:linear-gradient(90deg,var(--brand-100),var(--brand-200)); border-top:1px solid #e5e7eb; border-bottom:1px solid #e5e7eb}
.cta-band-inner{display:flex;align-items:center;justify-content:space-between;gap:16px}
.cta-band p{margin:0;color:#1f2937}

/* Footer */
.site-footer{padding:24px 0 0;background:#0b1022;color:#c7d2fe;margin-top:32px}
.footer-inner{display:flex;justify-content:space-between;gap:16px;align-items:flex-start}
.footer-brand p{margin:.2rem 0}
.logo-row{display:flex;align-items:center;gap:8px;margin-bottom:6px}
.footer-links{display:grid;gap:8px}
.footer-links a{color:#c7d2fe}
.footer-links a:hover{text-decoration:underline}
.copy{border-top:1px solid rgba(255,255,255,.1);padding:10px 0;text-align:center;color:#94a3b8}

/* Forms */
.form{display:grid;gap:12px}
.input, textarea{width:100%;padding:12px 14px;border:1px solid #e5e7eb;border-radius:12px}
textarea{min-height:160px;resize:vertical}
.form .row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.notice{background:#f8fafc;border:1px solid #e2e8f0;border-radius:12px;padding:12px;color:#334155}

/* Utilities */
.muted{color:var(--muted)}
.center{text-align:center}

/* Responsive */
@media (max-width: 900px){
  .hero-inner{grid-template-columns:1fr}
  .cards{grid-template-columns:1fr}
  .links{grid-template-columns:1fr}
  .nav-toggle{display:inline-block}
  .nav-list{position:absolute; right:10px; top:56px; flex-direction:column; background:white; border:1px solid #e5e7eb; border-radius:12px; padding:8px; display:none; box-shadow:var(--shadow)}
  .nav-list.open{display:flex}
  .cta-band-inner{flex-direction:column; align-items:flex-start}

  /* ← 追加：スマホでフォーム行を1列に */
  .form .row{grid-template-columns:1fr}
}