:root{--ink:#07182f;--navy:#0b2d57;--blue:#176fe5;--cyan:#55cdf1;--ice:#eef8ff;--line:#dce8f1;--muted:#62768b;--green:#159b74}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:#fff;font-family:"Noto Sans JP","Hiragino Kaku Gothic ProN",Meiryo,sans-serif;-webkit-font-smoothing:antialiased}.bk a{color:inherit;text-decoration:none}.bk-header{height:76px;max-width:1280px;margin:auto;padding:0 32px;display:flex;align-items:center;justify-content:space-between}.bk-logo{display:flex;align-items:center;gap:10px;font:800 17px Arial;letter-spacing:.08em}.bk-logo strong{color:var(--blue)}.bk-logo small{display:block;margin-top:4px;color:#879aab;font:700 6px Arial;letter-spacing:.18em}.bk-logo>i{width:29px;height:30px;display:flex;align-items:flex-end;gap:3px}.bk-logo>i b{width:7px;border-radius:2px;background:linear-gradient(#65d3f3,#176fe5);transform:skewY(-25deg)}.bk-logo>i b:nth-child(1){height:20px}.bk-logo>i b:nth-child(2){height:28px}.bk-logo>i 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