:root{--navy:#08295b;--navy2:#041d43;--blue:#0b5dc8;--sky:#eaf4ff;--line:#d9e4f1;--text:#10233f;--muted:#607089;--white:#fff;--shadow:0 12px 34px rgba(5,34,76,.10);--radius:18px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--text);background:#fff;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans JP","Hiragino Kaku Gothic ProN","Yu Gothic",sans-serif;line-height:1.7}.container{width:min(1180px,calc(100% - 40px));margin:auto}.narrow{width:min(860px,calc(100% - 40px));margin:auto}.screen-reader-text{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:blur(14px);border-bottom:1px solid 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