:root{--color-bg: #fbfcfb;--color-surface: #ffffff;--color-text: #2b2c2b;--color-text-muted: #62655f;--color-primary: #2f6f5e;--color-primary-dark: #234f43;--color-primary-light: #eef4f1;--color-primary-tint: #f5f8f6;--color-border: #e6e8e3;--color-shadow: rgba(35, 79, 67, .07);--font-sans: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Noto Sans JP", "Yu Gothic", "Meiryo", sans-serif;--font-serif: "Hiragino Mincho ProN", "YuMincho", "Yu Mincho", "Noto Serif JP", "Hiragino Mincho Pro", serif;--maxw: 1060px;--maxw-prose: 700px;--radius: 10px;--radius-sm: 7px}*,*:before,*:after{box-sizing:border-box}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}body{margin:0;font-family:var(--font-sans);color:var(--color-text);background:var(--color-bg);line-height:1.9;font-size:16.5px;letter-spacing:.01em;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased}a{color:var(--color-primary-dark);text-decoration:none}a:hover{text-decoration:underline}img{max-width:100%;height:auto}.container{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:22px}.prose{max-width:var(--maxw-prose);margin-inline:auto}.prose h2{font-family:var(--font-serif);font-size:1.42rem;font-weight:700;margin-top:2.6em;margin-bottom:.8em;padding-left:.65em;border-left:4px solid var(--color-primary);line-height:1.55}.prose h3{font-size:1.16rem;margin-top:1.9em;margin-bottom:.6em;line-height:1.55;color:var(--color-primary-dark)}.prose p{margin:1.2em 0}.prose ul,.prose ol{padding-left:1.4em;margin:1.2em 0}.prose li{margin:.5em 0}.prose blockquote{margin:1.6em 0;padding:.8em 1.3em;border-left:3px solid var(--color-primary);background:var(--color-primary-tint);border-radius:var(--radius-sm);color:var(--color-text)}.prose table{width:100%;border-collapse:collapse;margin:1.6em 0;font-size:.95rem}.prose th,.prose td{border:1px solid var(--color-border);padding:.65em .85em;text-align:left}.prose th{background:var(--color-primary-light);font-weight:600}.prose strong{color:var(--color-primary-dark);font-weight:700}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5em;padding:.8em 1.7em;border-radius:8px;font-weight:700;font-size:1rem;border:1.5px solid transparent;cursor:pointer;transition:background .15s ease,border-color .15s ease,color .15s ease}.btn:hover{text-decoration:none}.btn-primary{background:var(--color-primary);color:#fff}.btn-primary:hover{background:var(--color-primary-dark)}.btn-outline{background:var(--color-surface);color:var(--color-primary-dark);border-color:var(--color-border)}.btn-outline:hover{border-color:var(--color-primary);background:var(--color-primary-tint)}.cat-icon{display:inline-flex;align-items:center;justify-content:center;width:46px;height:46px;flex:0 0 46px;border-radius:50%;background:var(--color-primary-light);color:var(--color-primary-dark);font-family:var(--font-serif);font-size:1.2rem;font-weight:700;line-height:1}.cat-icon--sm{width:34px;height:34px;flex-basis:34px;font-size:.95rem}.ad-slot{margin:2.2rem auto;text-align:center}.ad-slot__label{display:block;font-size:.7rem;letter-spacing:.08em;color:#9a9d97;margin-bottom:.4rem}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.visually-balanced{text-wrap:balance}.site-header[data-astro-cid-3ef6ksr2]{position:sticky;top:0;z-index:50;background:#ffffffeb;backdrop-filter:saturate(180%) blur(8px);border-bottom:1px solid var(--color-border)}.header-inner[data-astro-cid-3ef6ksr2]{display:flex;align-items:center;justify-content:space-between;min-height:64px;gap:1rem}.brand[data-astro-cid-3ef6ksr2]{display:inline-flex;align-items:center;gap:.55rem;font-family:var(--font-serif);font-weight:700;font-size:1.12rem;color:var(--color-primary-dark);letter-spacing:.02em}.brand[data-astro-cid-3ef6ksr2]:hover{text-decoration:none}.brand-mark[data-astro-cid-3ef6ksr2]{display:block;width:36px;height:36px;border-radius:8px;object-fit:contain;flex:0 0 auto}@media(max-width:420px){.brand-name[data-astro-cid-3ef6ksr2]{font-size:1rem}.brand-mark[data-astro-cid-3ef6ksr2]{width:32px;height:32px}}.site-nav[data-astro-cid-3ef6ksr2] ul[data-astro-cid-3ef6ksr2]{display:flex;gap:1.4rem;list-style:none;margin:0;padding:0}.site-nav[data-astro-cid-3ef6ksr2] a[data-astro-cid-3ef6ksr2]{color:var(--color-text);font-weight:600;font-size:.95rem;padding-bottom:2px;border-bottom:2px solid transparent}.site-nav[data-astro-cid-3ef6ksr2] a[data-astro-cid-3ef6ksr2]:hover,.site-nav[data-astro-cid-3ef6ksr2] a[data-astro-cid-3ef6ksr2].active{color:var(--color-primary-dark);border-bottom-color:var(--color-primary);text-decoration:none}.nav-toggle[data-astro-cid-3ef6ksr2],.nav-burger[data-astro-cid-3ef6ksr2]{display:none}@media(max-width:720px){.nav-burger[data-astro-cid-3ef6ksr2]{display:flex;flex-direction:column;gap:5px;cursor:pointer;padding:6px}.nav-burger[data-astro-cid-3ef6ksr2] span[data-astro-cid-3ef6ksr2]{width:24px;height:2px;background:var(--color-text);border-radius:2px}.site-nav[data-astro-cid-3ef6ksr2]{position:absolute;top:64px;left:0;right:0;background:var(--color-surface);border-bottom:1px solid var(--color-border);max-height:0;overflow:hidden;transition:max-height .25s ease}.site-nav[data-astro-cid-3ef6ksr2] ul[data-astro-cid-3ef6ksr2]{flex-direction:column;gap:0;padding:.5rem 20px}.site-nav[data-astro-cid-3ef6ksr2] li[data-astro-cid-3ef6ksr2]{padding:.7rem 0;border-bottom:1px solid var(--color-border)}.nav-toggle[data-astro-cid-3ef6ksr2]:checked~.site-nav[data-astro-cid-3ef6ksr2]{max-height:360px}}.site-footer[data-astro-cid-sz7xmlte]{margin-top:4rem;background:var(--color-primary-dark);color:#e8efed}.footer-grid[data-astro-cid-sz7xmlte]{display:grid;grid-template-columns:1.8fr 1fr 1fr 1fr;gap:2rem;padding-top:3rem;padding-bottom:2rem}.footer-brand[data-astro-cid-sz7xmlte]{font-family:var(--font-serif);font-weight:700;font-size:1.1rem;margin:0 0 .6rem;color:#fff}.footer-desc[data-astro-cid-sz7xmlte]{font-size:.85rem;line-height:1.7;color:#c5d6d1;margin:0 0 .7rem}.footer-contact[data-astro-cid-sz7xmlte]{font-size:.82rem;color:#c5d6d1;margin:0}.footer-contact[data-astro-cid-sz7xmlte] a[data-astro-cid-sz7xmlte]{color:#fff}.footer-col[data-astro-cid-sz7xmlte] h2[data-astro-cid-sz7xmlte]{font-size:.95rem;margin:0 0 .8rem;color:#fff}.footer-col[data-astro-cid-sz7xmlte] ul[data-astro-cid-sz7xmlte]{list-style:none;margin:0;padding:0}.footer-col[data-astro-cid-sz7xmlte] li[data-astro-cid-sz7xmlte]{margin:.4rem 0}.footer-col[data-astro-cid-sz7xmlte] a[data-astro-cid-sz7xmlte]{color:#c5d6d1;font-size:.9rem}.footer-col[data-astro-cid-sz7xmlte] a[data-astro-cid-sz7xmlte]:hover{color:#fff}.footer-bottom[data-astro-cid-sz7xmlte]{border-top:1px solid rgba(255,255,255,.15);padding:1rem 0;font-size:.8rem;color:#a9bdb7}.footer-bottom[data-astro-cid-sz7xmlte] p[data-astro-cid-sz7xmlte]{margin:0}@media(max-width:720px){.footer-grid[data-astro-cid-sz7xmlte]{grid-template-columns:1fr;gap:1.6rem}}