:root{--ink:#16212b;--paper:#f3f8fb;--paper-2:#fff;--muted:#5c6b76;--line:rgba(22,33,43,.12);--sky:#9fd9e6;--sea:#2aa7c9;--sea-deep:#1c6f8c;--matsuri:#ff5d3b;--matsuri-2:#ffb02e;--lantern:#ff7a4d;--max:1080px;--radius:22px;--shadow:0 24px 64px rgba(16,40,60,.14)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;overflow-x:hidden;background:var(--paper);color:var(--ink);font-family:Hiragino Kaku Gothic ProN,Yu Gothic,YuGothic,Noto Sans JP,system-ui,-apple-system,BlinkMacSystemFont,sans-serif;letter-spacing:.01em;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}.site-header{position:fixed;top:0;left:0;right:0;z-index:30;background:hsla(0,0%,100%,.55);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid transparent;transition:background .3s ease,box-shadow .3s ease,border-color .3s ease}.site-header.is-scrolled{background:hsla(0,0%,100%,.92);border-bottom-color:var(--line);box-shadow:0 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