:root{--blue: #00a0e9;--blue-lt: #e8f6fd;--blue-md: #7dcef5;--text: #1a1a1a;--text-sub: #6e6e73;--bg: #ffffff;--bg-soft: #f0f9fe;--off-white: #fafcfe;--border: #d8eef8;--radius: 12px;--max: 980px}[data-astro-cid-sckkx6r4]{margin:0;padding:0;box-sizing:border-box}body{font-family:Noto Sans JP,-apple-system,Hiragino Sans,sans-serif;background:var(--bg-soft);color:var(--text);line-height:1.8;font-size:16px;-webkit-font-smoothing:antialiased}header[data-astro-cid-sckkx6r4]{position:sticky;top:0;z-index:200;background:var(--off-white);border-bottom:1px solid var(--border);height:56px;display:flex;align-items:center;justify-content:center}.header-inner[data-astro-cid-sckkx6r4]{width:100%;max-width:var(--max);padding:0 1.5rem;display:flex;align-items:center;gap:.75rem}header[data-astro-cid-sckkx6r4] img[data-astro-cid-sckkx6r4]{width:36px;height:36px;flex-shrink:0}.site-name-wrap[data-astro-cid-sckkx6r4]{display:flex;flex-direction:column;gap:0;overflow:hidden}.site-name[data-astro-cid-sckkx6r4]{font-size:1.1rem;font-weight:700;letter-spacing:-.02em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;line-height:1.2}.site-tagline[data-astro-cid-sckkx6r4]{font-size:.65rem;color:var(--text-sub);font-weight:400;white-space:nowrap;letter-spacing:0;line-height:1.3}nav[data-astro-cid-sckkx6r4].desktop-nav{margin-left:auto;display:flex;gap:.1rem}.nav-item[data-astro-cid-sckkx6r4]{position:relative}.nav-item[data-astro-cid-sckkx6r4]>a[data-astro-cid-sckkx6r4]{color:var(--text-sub);text-decoration:none;font-size:.82rem;padding:.3rem .75rem;border-radius:20px;display:block;white-space:nowrap;transition:background .15s,color .15s}.nav-item[data-astro-cid-sckkx6r4]>a[data-astro-cid-sckkx6r4]:hover{background:var(--blue-lt);color:var(--blue)}.sub-menu[data-astro-cid-sckkx6r4]{position:absolute;top:100%;left:50%;transform:translate(-50%);padding-top:8px;background:var(--off-white);border:1px solid var(--border);border-radius:10px;box-shadow:0 8px 24px #00a0e91f;min-width:140px;z-index:300;overflow:hidden;opacity:0;pointer-events:none;transition:opacity .2s ease}.nav-item[data-astro-cid-sckkx6r4]:hover .sub-menu[data-astro-cid-sckkx6r4]{opacity:1;pointer-events:auto}.sub-menu[data-astro-cid-sckkx6r4] a[data-astro-cid-sckkx6r4]{display:block;padding:.6rem 1rem;font-size:.82rem;color:var(--text);text-decoration:none;border-bottom:1px solid var(--border);white-space:nowrap;transition:background .1s}.sub-menu[data-astro-cid-sckkx6r4] a[data-astro-cid-sckkx6r4]:last-child{border-bottom:none}.sub-menu[data-astro-cid-sckkx6r4] a[data-astro-cid-sckkx6r4]:hover{background:var(--blue-lt);color:var(--blue)}.hamburger[data-astro-cid-sckkx6r4]{display:none;margin-left:auto;background:none;border:none;cursor:pointer;padding:6px;border-radius:8px;transition:background .15s}.hamburger[data-astro-cid-sckkx6r4]:hover{background:var(--blue-lt)}.hamburger[data-astro-cid-sckkx6r4] span[data-astro-cid-sckkx6r4]{display:block;width:22px;height:2px;background:var(--text);border-radius:2px;transition:all .25s;margin:5px 0}.hamburger[data-astro-cid-sckkx6r4].open span[data-astro-cid-sckkx6r4]:nth-child(1){transform:translateY(7px) rotate(45deg)}.hamburger[data-astro-cid-sckkx6r4].open span[data-astro-cid-sckkx6r4]:nth-child(2){opacity:0}.hamburger[data-astro-cid-sckkx6r4].open span[data-astro-cid-sckkx6r4]:nth-child(3){transform:translateY(-7px) rotate(-45deg)}.mobile-menu[data-astro-cid-sckkx6r4]{display:none;position:fixed;top:56px;left:0;right:0;background:var(--off-white);border-bottom:1px solid var(--border);box-shadow:0 8px 24px #00000014;z-index:199;max-height:calc(100vh - 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