:root{--primary-cyan:#80deea;--light-cyan:#b2ebf2;--lighter-cyan:#e0f7fa;--white:#fff;--text-dark:#333;--text-gray:#666;--text-light:#999;--border-light:#e5e5e5;--shadow:rgba(0,0,0,.08);--font-serif:"Noto Serif JP",Georgia,"Hiragino Mincho ProN",serif;--font-sans:"Hiragino Sans","Hiragino Kaku Gothic ProN","Helvetica Neue",Arial,Meiryo,sans-serif;--content-width:760px;--max-width:1100px}*{box-sizing:border-box}html{scroll-behavior:smooth}body,html{padding:0;margin:0}body{background:var(--white);color:var(--text-dark);font-family:var(--font-sans);font-size:16px;line-height:1.9;-webkit-font-smoothing:antialiased}a{color:var(--primary-cyan)}header.site-header{background:linear-gradient(135deg,var(--lighter-cyan) 0,var(--white) 100%);padding:2.5rem 1.5rem 2rem;text-align:center;border-bottom:1px solid var(--border-light)}header.site-header .brand{font-family:var(--font-serif);font-size:1.9rem;font-weight:400;letter-spacing:.06em;text-decoration:none;color:var(--text-dark)}header.site-header .tagline{margin-top:.6rem;color:var(--text-gray);font-size:.95rem}.container{max-width:var(--max-width);margin:0 auto;padding:2.5rem 1.25rem 5rem}.intro-text{max-width:var(--content-width);margin:0 auto 2.5rem;text-align:center;color:var(--text-gray)}.post-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));grid-gap:2rem;gap:2rem}.post-card{display:block;background:var(--white);border-radius:10px;overflow:hidden;box-shadow:0 4px 14px var(--shadow);text-decoration:none;color:inherit;transition:transform .25s ease,box-shadow .25s ease}.post-card:hover{transform:translateY(-6px);box-shadow:0 10px 24px rgba(128,222,234,.35)}.post-card-image{width:100%;height:200px;object-fit:cover;background:linear-gradient(135deg,var(--lighter-cyan),var(--light-cyan));display:block}.post-card-body{padding:1.4rem}.category-badge{display:inline-block;padding:3px 12px;background:var(--lighter-cyan);color:var(--text-gray);font-size:.72rem;border-radius:12px;font-weight:500;margin-bottom:.8rem}.post-card h2{font-family:var(--font-serif);font-weight:400;font-size:1.2rem;line-height:1.5;margin:0 0 .6rem;color:var(--text-dark)}.post-meta{color:var(--text-light);font-size:.82rem}.post-card p.excerpt{color:var(--text-gray);font-size:.9rem;margin:.6rem 0 0;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}article.post-body{max-width:var(--content-width);margin:0 auto}.post-hero-image{width:100%;height:340px;object-fit:cover;border-radius:10px;box-shadow:0 6px 18px var(--shadow);margin-bottom:2rem}article.post-body h1{font-family:var(--font-serif);font-weight:400;font-size:2.1rem;line-height:1.4;color:var(--text-dark);margin-bottom:.6rem}article.post-body>.post-meta{display:block;padding-bottom:1.2rem;margin-bottom:1.6rem;border-bottom:2px solid var(--lighter-cyan)}article.post-body h2{font-size:1.5rem;margin-top:2.5rem;margin-bottom:1rem;border-left:4px solid var(--primary-cyan);padding-left:.75rem}article.post-body h2,article.post-body h3{font-family:var(--font-serif);font-weight:400}article.post-body h3{font-size:1.25rem;margin-top:1.75rem}article.post-body p{margin-bottom:1.2rem}.faq-item{margin-bottom:1.75rem;padding:1.2rem 1.4rem;background:var(--lighter-cyan);border-radius:8px}.faq-item .q{font-weight:600;margin-bottom:.5rem;color:var(--text-dark)}.faq-item .a{color:var(--text-gray)}.back-link{display:inline-block;margin-bottom:2rem;padding:.5rem 1.3rem;background:var(--lighter-cyan);color:var(--text-dark);text-decoration:none;border-radius:20px;font-size:.9rem;transition:background .25s ease,color .25s ease}.back-link:hover{background:var(--primary-cyan);color:var(--white)}@media (max-width:640px){header.site-header .brand{font-size:1.5rem}article.post-body h1{font-size:1.6rem}.post-hero-image{height:220px}}