:root{
  --ink:#0d0d0f; --paper:#ffffff; --gray:#8a8f98; --line:#e6e7ea; --soft:#f5f6f8; --max:1180px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Hiragino Kaku Gothic ProN','Yu Gothic',-apple-system,sans-serif;color:var(--ink);background:var(--paper);line-height:1.8;-webkit-font-smoothing:antialiased}
.wrap{max-width:var(--max);margin:0 auto;padding:0 28px}
a{color:inherit;text-decoration:none}
img{max-width:100%}
/* Header */
header{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(255,255,255,.9);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:80px}
.brand{display:flex;align-items:center;gap:12px;font-weight:800;letter-spacing:.04em}
.brand img{height:48px;width:auto;background:#0d0d0f;border-radius:5px;padding:4px}
.brand .co{font-size:15px}
.brand .co small{display:block;font-size:10px;color:var(--gray);font-weight:600;letter-spacing:.12em}
.menu{display:flex;gap:28px;font-size:13px;font-weight:700;letter-spacing:.05em}
.menu a{color:#33363d;transition:.15s}.menu a:hover{color:#000}
.navcta{background:#0d0d0f;color:#fff;padding:10px 20px;border-radius:6px;font-size:13px;font-weight:700}
.burger{display:none;font-size:24px;cursor:pointer;background:none;border:0}
@media(max-width:880px){.menu,.navcta{display:none}.burger{display:block}}
/* page hero */
.phero{background:#0d0d0f;color:#fff;padding:150px 0 70px}
.phero .en{font-size:13px;letter-spacing:.3em;color:var(--gray);font-weight:700;margin-bottom:14px}
.phero h1{font-size:40px;font-weight:900;letter-spacing:.02em}
.phero p{margin-top:18px;color:#c3c7ce;max-width:620px;font-size:16px}
@media(max-width:680px){.phero{padding:120px 0 56px}.phero h1{font-size:28px}}
/* sections */
section{padding:84px 0}
.eyebrow{font-size:13px;letter-spacing:.22em;font-weight:800;color:var(--gray);margin-bottom:14px}
.sec-title{font-size:30px;font-weight:900;line-height:1.4;margin-bottom:10px;letter-spacing:.01em}
.sec-lead{color:#54585f;font-size:16px;max-width:700px}
@media(max-width:680px){.sec-title{font-size:23px}section{padding:56px 0}}
.btn{display:inline-block;padding:15px 32px;border-radius:7px;font-size:15px;font-weight:700;transition:.18s}
.btn-k{background:#0d0d0f;color:#fff}.btn-k:hover{transform:translateY(-2px)}
.btn-w{background:#fff;color:#0d0d0f}
.btn-o{border:1px solid rgba(255,255,255,.4);color:#fff}.btn-o:hover{background:rgba(255,255,255,.1)}
/* table */
.ctable{width:100%;border-collapse:collapse;margin-top:30px;font-size:15px}
.ctable th,.ctable td{padding:18px 20px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
.ctable th{width:200px;font-weight:800;color:#0d0d0f;background:var(--soft)}
@media(max-width:680px){.ctable th,.ctable td{display:block;width:100%}.ctable th{border-bottom:0}}
/* CTA */
.cta{background:#0d0d0f;color:#fff;text-align:center}
.cta h2{font-size:30px;font-weight:900;line-height:1.4}
.cta p{color:#c3c7ce;margin:18px 0 32px;font-size:16px}
/* footer */
footer{background:#08080a;color:#9a9ea6;padding:54px 0 28px;font-size:13px}
.fcols{display:flex;justify-content:space-between;flex-wrap:wrap;gap:30px;margin-bottom:34px}
.fbrand img{height:40px;background:#0d0d0f;border-radius:5px;padding:4px}
.fbrand p{margin-top:14px;max-width:340px;color:#777b83}
.fnav{display:flex;gap:48px;flex-wrap:wrap}
.fnav b{color:#fff;font-size:13px;display:block;margin-bottom:12px;letter-spacing:.08em}
.fnav a{display:block;color:#9a9ea6;margin-bottom:9px}
.copy{border-top:1px solid rgba(255,255,255,.1);padding-top:22px;color:#666}


/* === グループ会社セクション === */
#group{padding:96px 0}
.groupgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:46px}
@media(max-width:980px){.groupgrid{grid-template-columns:1fr 1fr}}
.gcard{display:block;border:1px solid var(--line);border-radius:14px;padding:38px 34px;background:#fff;transition:.2s;position:relative}
.gcard:hover{border-color:var(--ink);transform:translateY(-3px);box-shadow:0 14px 40px rgba(13,13,15,.08)}
.gcard .gtag{font-size:11px;letter-spacing:.14em;font-weight:800;color:var(--gray)}
.gcard .gname{font-size:26px;font-weight:900;margin-top:14px;color:var(--ink)}
.gcard .gen{font-size:12px;letter-spacing:.22em;color:var(--gray);font-weight:700;margin-top:4px}
.gcard p{font-size:14px;line-height:1.9;color:#4a4f57;margin-top:18px}
.gcard .glink{display:inline-block;margin-top:20px;font-size:13px;font-weight:800;color:var(--ink);letter-spacing:.04em}
@media(max-width:760px){.groupgrid{grid-template-columns:1fr}#group{padding:64px 0}}

/* === コラム（記事）=== */
.col-list{max-width:var(--max);margin:0 auto;padding:60px 24px 80px}
.col-item{display:block;border-bottom:1px solid var(--line);padding:28px 0;transition:.2s}
.col-item:hover{padding-left:8px}
.col-item .cat{font-size:11px;letter-spacing:.14em;font-weight:800;color:var(--gray)}
.col-item h2{font-size:21px;font-weight:800;margin:8px 0 6px;color:var(--ink)}
.col-item p{font-size:14px;color:#54585f}
.article{max-width:760px;margin:0 auto;padding:50px 24px 80px}
.article .cat{font-size:12px;letter-spacing:.14em;font-weight:800;color:var(--gray)}
.article h1{font-size:32px;font-weight:900;line-height:1.4;margin:14px 0 10px}
.article .meta{font-size:13px;color:var(--gray);border-bottom:1px solid var(--line);padding-bottom:24px;margin-bottom:30px}
.article h2{font-size:23px;font-weight:800;margin:44px 0 16px;padding-left:14px;border-left:4px solid var(--ink)}
.article h3{font-size:18px;font-weight:800;margin:30px 0 10px}
.article p{font-size:16px;line-height:2;color:#2c2f35;margin:14px 0}
.article ul,.article ol{margin:14px 0 14px 24px;line-height:2}
.article li{font-size:16px;color:#2c2f35}
.article .lead{font-size:17px;color:#444;background:var(--soft);padding:22px 24px;border-radius:12px}
.article .faq{margin-top:50px;border-top:1px solid var(--line);padding-top:30px}
.article .faq dt{font-weight:800;font-size:16px;margin-top:20px}
.article .faq dd{margin:8px 0 0;color:#44484f;line-height:1.9}
.article .cta-box{margin-top:54px;background:#0d0d0f;color:#fff;border-radius:16px;padding:40px 36px;text-align:center}
.article .cta-box h3{font-size:21px;font-weight:800;color:#fff;margin-bottom:10px}
.article .cta-box p{color:#c3c7ce;font-size:15px;margin-bottom:22px}
.article .rel{margin-top:44px}
.article .rel b{font-size:13px;letter-spacing:.1em;color:var(--gray);display:block;margin-bottom:12px}
.article .rel a{display:block;padding:10px 0;border-bottom:1px solid var(--line);font-weight:700;color:var(--ink);font-size:15px}