:root{--navy:#0a1d3d;--navy2:#07152e;--blue:#12366d;--ink:#111827;--muted:#64748b;--line:#e5e7eb;--soft:#f5f7fb;--gray:#6b7280;--white:#fff;--max:1180px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Noto Sans JP","Hiragino Kaku Gothic ProN","Yu Gothic",Meiryo,sans-serif;color:var(--ink);background:#fff;line-height:1.7}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}.container{width:min(var(--max),calc(100% - 40px));margin:0 auto}.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.94);backdrop-filter:blur(10px);border-bottom:1px solid rgba(15,23,42,.08)}.header-inner{height:82px;display:flex;align-items:center;justify-content:space-between}.brand img{width:210px;height:auto}.nav{display:flex;align-items:center;gap:28px;font-size:14px;font-weight:600;color:#172033}.nav a{padding:28px 0;border-bottom:2px solid transparent}.nav a.active,.nav 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