:root{--navy:#071827;--green:#123f35;--ink:#172026;--gold:#bfa36a;--warm:#f5f3ee;--line:rgba(7,24,39,.15);--sans:"Noto Sans JP",sans-serif;--serif:"Noto Serif JP",serif;--latin:Inter,sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);font-family:var(--sans);-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}img{display:block;width:100%}.portal-header{position:fixed;z-index:80;top:0;right:0;left:0;height:92px;display:flex;align-items:center;padding:12px clamp(24px,4.6vw,74px);background:rgba(255,255,255,.97);border-bottom:1px solid var(--line);box-shadow:0 9px 28px rgba(7,24,39,.07);backdrop-filter:blur(12px)}.portal-brand{display:flex;align-items:center;gap:14px;margin-right:auto}.portal-brand img{width:210px;height:62px;object-fit:contain}.portal-brand span{padding-left:14px;border-left:1px solid rgba(7,24,39,.25);font:500 8px 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