:root{--navy:#073e79;--deep:#082f60;--blue:#1266dc;--yellow:#ffe957;--red:#ff294a;--pale:#effaff;--ink:#102f54;--light:#f4f9ff;--stroke:#d7e8f7}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:linear-gradient(155deg,#cce8ff,#f1f8ff 54%,#fff1e3);font-family:-apple-system,BlinkMacSystemFont,'Hiragino Kaku Gothic ProN','Yu Gothic',Meiryo,sans-serif;line-height:1.6}button,a{touch-action:manipulation}a{color:inherit}button{font:inherit}main.page{width:100%;max-width:448px;min-height:100vh;margin:0 auto;background:#fff;box-shadow:0 3px 50px #062c5b22;overflow:hidden}.site-head{background:#fff;min-height:80px;padding:12px 20px;display:flex;align-items:center;justify-content:space-between;gap:10px;border-bottom:1px solid #e3e9f4}.brand{display:flex;align-items:center;gap:9px;text-decoration:none;min-width:0}.brand-mark{font-size:31px;line-height:1}.brand-jp{color:var(--deep);font-size:17px;font-weight:1000;letter-spacing:-.065em;line-height:1.25;white-space:nowrap}.brand-en{font-size:8px;letter-spacing:.09em;color:#295f9c;font-weight:800;line-height:1.1}.head-nav{display:flex;gap:6px;flex-shrink:0}.head-nav a{font-size:10px;color:var(--deep);border:1.5px solid var(--stroke);border-radius:30px;padding:7px 9px;text-decoration:none;font-weight:850}.subhead{height:66px;display:flex;gap:8px;align-items:center;border-bottom:1px solid #dfebf6;background:white;padding:0 14px}.subhead a{text-decoration:none;color:var(--blue);font-size:13px;white-space:nowrap}.subhead b{font-size:17px;color:#122b4c;margin:auto;padding-right:45px}.reference-hero{width:100%;height:auto;display:block;aspect-ratio:408 / 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h2{font-size:17px;margin:0 0 8px}.contact a{color:#075cba;font-weight:700;overflow-wrap:anywhere}.contact-links{display:flex;flex-wrap:wrap;gap:8px 13px;margin:17px 0 0}.contact-links a{font-size:11px}.copyright{text-align:center;padding:13px 8px;background:#062f64;color:#fff;font-size:10px;letter-spacing:.13em}.video-frame{position:relative;background:#062745;padding:13px 0 9px}.video-hero{margin:0 15px 10px;background:#d9f0ff;padding:9px 15px;border-radius:12px;font-size:19px;font-weight:950;color:var(--deep);text-align:center}.video-hero strong{color:var(--red)}.video-player{display:block;width:min(86%,330px);max-height:545px;aspect-ratio:9/16;margin:auto;border-radius:16px;background:#0d315c;box-shadow:0 8px 25px #0007;object-fit:cover}.video-caption{text-align:center;color:#d2e8ff;font-size:11px;padding:8px 12px}.video-list-title{background:#ebf8ff;color:var(--deep);font-size:18px;font-weight:1000;padding:15px 18px}.video-list{padding:0 15px 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