.site-header[data-astro-cid-atsauox2]{height:var(--header-height);background-color:#fffffff2;backdrop-filter:blur(10px);border-bottom:1px solid var(--color-border);position:sticky;top:0;z-index:100}.header-container[data-astro-cid-atsauox2]{height:100%;display:flex;align-items:center;justify-content:space-between}.logo[data-astro-cid-atsauox2]{display:flex;align-items:center;gap:.5rem;font-family:var(--font-serif);font-weight:700;font-size:1.5rem;color:var(--color-primary)}.logo-icon[data-astro-cid-atsauox2]{font-size:1.75rem;color:var(--color-secondary);display:flex}.header-right[data-astro-cid-atsauox2]{display:flex;align-items:center;gap:1.5rem}.desktop-nav[data-astro-cid-atsauox2] ul[data-astro-cid-atsauox2]{display:flex;gap:2rem}.desktop-nav[data-astro-cid-atsauox2] a[data-astro-cid-atsauox2]{font-weight:500;font-size:.95rem;color:var(--color-text);transition:color .2s}.desktop-nav[data-astro-cid-atsauox2] a[data-astro-cid-atsauox2]:hover{color:var(--color-secondary)}.search-btn[data-astro-cid-atsauox2]{background:none;border:none;cursor:pointer;font-size:1.5rem;color:var(--color-text);padding:.25rem;display:flex}.search-btn[data-astro-cid-atsauox2]:hover{color:var(--color-secondary)}.menu-toggle[data-astro-cid-atsauox2]{display:none;width:32px;height:32px;background:none;border:none;cursor:pointer;position:relative;z-index:110;padding:0}.menu-toggle[data-astro-cid-atsauox2] span[data-astro-cid-atsauox2]{display:block;width:24px;height:2px;background:var(--color-text);transition:all .3s ease;transform-origin:center;position:absolute;left:4px}.menu-toggle[data-astro-cid-atsauox2] span[data-astro-cid-atsauox2]:nth-child(1){top:8px}.menu-toggle[data-astro-cid-atsauox2] span[data-astro-cid-atsauox2]:nth-child(2){top:15px}.menu-toggle[data-astro-cid-atsauox2] span[data-astro-cid-atsauox2]:nth-child(3){top:22px}.menu-toggle[data-astro-cid-atsauox2].is-open 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a[data-astro-cid-w56vunm4]{color:#fff;font-size:1.5rem;opacity:.8;transition:opacity .2s}.social-links[data-astro-cid-w56vunm4] a[data-astro-cid-w56vunm4]:hover{opacity:1}.footer-links[data-astro-cid-w56vunm4] h4[data-astro-cid-w56vunm4]{color:#fff;margin-bottom:1.25rem;font-size:1.1rem}.footer-links[data-astro-cid-w56vunm4] ul[data-astro-cid-w56vunm4]{display:flex;flex-direction:column;gap:.75rem}.footer-links[data-astro-cid-w56vunm4] a[data-astro-cid-w56vunm4]{color:#94a3b8;transition:color .2s}.footer-links[data-astro-cid-w56vunm4] a[data-astro-cid-w56vunm4]:hover{color:#fff}.footer-bottom[data-astro-cid-w56vunm4]{border-top:1px solid rgba(255,255,255,.1);padding-top:2rem;text-align:center;color:#64748b;font-size:.875rem}@media(max-width:768px){.footer-grid[data-astro-cid-w56vunm4]{grid-template-columns:1fr}}:root{--color-primary: #0F172A;--color-secondary: #3B82F6;--color-text: #334155;--color-text-light: #64748b;--color-background: #F8FAFC;--color-surface: #FFFFFF;--color-border: #E2E8F0;--color-accent: #F59E0B;--font-base: "Noto Sans JP", sans-serif;--font-serif: "Noto Serif JP", serif;--container-width: 1200px;--header-height: 70px}*{box-sizing:border-box}body{margin:0;padding:0;font-family:var(--font-base);color:var(--color-text);background-color:var(--color-background);line-height:1.7}h1,h2,h3,h4,h5,h6{font-family:var(--font-serif);line-height:1.4;margin-top:0;color:var(--color-primary)}a{color:inherit;text-decoration:none}img{max-width:100%;height:auto;display:block}ul{list-style:none;padding:0;margin:0}.container{width:100%;max-width:var(--container-width);margin:0 auto;padding:0 1.5rem}.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}