:root{--primary:#1E3A5F;--primary2:#2D5A8A;--accent:#E8702A;--bg:#F8FAFE;--surface:#FFFFFF;--text:#1F2937;--text2:#6B7280;--border:#E5E7EB;--shadow:0 2px 12px rgba(0,0,0,0.08);--radius:12px;--serif:'Noto Serif JP',serif}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:'Noto Sans JP',sans-serif;background:var(--bg);color:var(--text);line-height:1.7;font-size:16px}
a{color:var(--primary);text-decoration:none}
a:hover{color:var(--accent)}
img{max-width:100%;height:auto;border-radius:var(--radius)}
.container{max-width:1200px;margin:0 auto;padding:0 1.5rem}
.navbar{background:var(--surface);position:sticky;top:0;z-index:100;box-shadow:var(--shadow);border-bottom:1px solid var(--border)}
.navbar .container{display:flex;align-items:center;justify-content:space-between;padding:1rem 1.5rem}
.navbar .logo{font-size:1.3rem;font-weight:700;color:var(--primary);display:flex;align-items:center;gap:0.4rem}
.navbar .logo-icon{font-size:1.5rem}
.navbar .nav-links{display:flex;list-style:none;gap:2rem;align-items:center}
.navbar .nav-links a{color:var(--text);font-weight:500;transition:color 0.2s}
.navbar .nav-links a:hover,.navbar .nav-links a.active{color:var(--accent)}
.hamburger{display:none;background:none;border:none;cursor:pointer;font-size:1.5rem;padding:0.25rem}
@media(max-width:768px){
.navbar .nav-links{position:fixed;top:60px;left:0;right:0;background:var(--surface);flex-direction:column;gap:0;padding:1rem 0;box-shadow:0 4px 12px rgba(0,0,0,0.1);display:none}
.navbar .nav-links.open{display:flex}
.navbar .nav-links li{width:100%;text-align:center;padding:0.75rem 0}
.hamburger{display:block}
}
.hero{background:linear-gradient(135deg,var(--primary) 0%,var(--primary2) 100%);color:#fff;text-align:center;padding:4rem 1.5rem}
.hero h1{font-size:2.5rem;font-weight:800;margin-bottom:1rem}
.hero p{font-size:1.2rem;opacity:0.9;max-width:600px;margin:0 auto 2rem}
.hero-btns{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap}
.btn{padding:0.8rem 2rem;border-radius:50px;font-weight:600;display:inline-block;text-align:center;cursor:pointer;border:none;font-size:1rem;transition:all 0.2s}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:#d45f22;color:#fff}
.btn-secondary{background:rgba(255,255,255,0.15);color:#fff;border:2px solid rgba(255,255,255,0.4)}
.btn-secondary:hover{background:rgba(255,255,255,0.25);color:#fff}
.section{padding:3.5rem 0}
.section-title{text-align:center;margin-bottom:2.5rem}
.section-title h2{font-size:1.8rem;color:var(--primary);margin-bottom:0.5rem}
.section-title p{color:var(--text2)}
.stats-bar{background:var(--primary);color:#fff;padding:2rem;text-align:center;display:flex;justify-content:center;gap:3rem;flex-wrap:wrap}
.stats-bar .stat strong{display:block;font-size:2rem;font-weight:800;color:var(--accent)}
.filter-bar{display:flex;gap:0.5rem;flex-wrap:wrap;justify-content:center;margin-bottom:2rem;padding:0 1rem}
.filter-btn{background:var(--surface);border:1px solid var(--border);padding:0.5rem 1.2rem;border-radius:50px;cursor:pointer;font-size:0.9rem;color:var(--text);transition:all 0.2s;font-family:inherit}
.filter-btn.active,.filter-btn:hover{background:var(--primary);color:#fff;border-color:var(--primary)}
.articles-grid,.tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.5rem}
.article-card-wrapper,.tool-card-wrapper{text-decoration:none;display:block}
.article-card,.tool-card{background:var(--surface);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);border:1px solid var(--border);transition:transform 0.2s,box-shadow 0.2s;height:100%}
.article-card:hover,.tool-card:hover{transform:translateY(-4px);box-shadow:0 8px 24px rgba(0,0,0,0.12)}
.article-card img{width:100%;height:180px;object-fit:cover}
.article-card-body,.tool-card-body{padding:1.2rem}
.category-badge{display:inline-block;background:var(--primary);color:#fff;font-size:0.75rem;padding:0.2rem 0.7rem;border-radius:50px;margin-bottom:0.5rem;font-weight:500}
.tool-card .tool-icon{font-size:2.5rem;text-align:center;padding:1.5rem;background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff}
.tool-card h3{font-size:1.1rem;color:var(--primary);margin:0.5rem 0}
.tool-card p{color:var(--text2);font-size:0.9rem}
.article-card h3{font-size:1.05rem;color:var(--primary);margin-bottom:0.5rem;line-height:1.4}
.article-card p{color:var(--text2);font-size:0.9rem}
.breadcrumb{background:var(--surface);border-bottom:1px solid var(--border);padding:0.8rem 0;font-size:0.9rem;color:var(--text2)}
.breadcrumb a{color:var(--primary)}
.page-header{background:linear-gradient(135deg,var(--primary) 0%,var(--primary2) 100%);color:#fff;padding:3rem 1.5rem;text-align:center}
.page-header h1{font-size:2rem;font-weight:800;margin-bottom:0.5rem}
.page-header .lead{font-size:1.1rem;opacity:0.9}
.article-page,.tool-page{max-width:800px;margin:2rem auto;padding:0 1.5rem}
.article-page h1,.tool-page h1{font-size:1.8rem;color:var(--primary);margin-bottom:0.5rem}
.article-meta{color:var(--text2);font-size:0.9rem;margin-bottom:1.5rem;padding-bottom:1rem;border-bottom:1px solid var(--border)}
.article-content h2{font-family:var(--serif);font-size:1.4rem;color:var(--primary);margin:2rem 0 1rem;padding-bottom:0.5rem;border-bottom:2px solid var(--accent)}
.article-content h3{font-size:1.15rem;color:var(--primary2);margin:1.5rem 0 0.75rem}
.article-content p{margin-bottom:1.2rem;color:var(--text);font-size:1.02rem;line-height:1.8}
.article-content .lead{font-size:1.15rem;color:var(--text2);margin-bottom:1.5rem;font-style:italic;border-left:4px solid var(--accent);padding-left:1rem}
.article-content ul,.article-content ol{margin:1rem 0 1.5rem 1.5rem}
.article-content li{margin-bottom:0.5rem}
.article-content blockquote{background:var(--surface);border-left:4px solid var(--accent);padding:1rem 1.5rem;margin:1.5rem 0;border-radius:0 var(--radius) var(--radius) 0;font-style:italic;color:var(--primary2)}
.article-content img{margin:1.5rem 0;border-radius:var(--radius);width:100%}
.faq-item{background:var(--surface);border-radius:var(--radius);padding:1.2rem 1.5rem;margin-bottom:1rem;border:1px solid var(--border)}
.faq-item h3{color:var(--primary);font-size:1rem;margin-bottom:0.5rem}
.faq-item p{color:var(--text2);margin:0}
.toc{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem;margin-bottom:2rem}
.toc h3{font-size:1rem;color:var(--primary);margin-bottom:0.75rem}
.toc ol{margin-left:1.5rem}
.toc li{margin-bottom:0.3rem}
.toc a{color:var(--text);font-size:0.95rem}
.toc a:hover{color:var(--accent)}
.related-articles,.related-tools{margin-top:2rem;padding-top:1.5rem;border-top:1px solid var(--border)}
.related-articles h2,.related-tools h2{font-size:1.1rem;color:var(--primary);margin-bottom:1rem}
.related-articles ul,.related-tools ul{list-style:none;display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:0.75rem}
.related-articles li,.related-tools li{background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:0.75rem 1rem}
.related-articles a,.related-tools a{color:var(--text);font-size:0.95rem}
.related-articles a:hover,.related-tools a:hover{color:var(--accent)}
.footer{background:var(--primary);color:#fff;padding:3rem 0 1.5rem;margin-top:4rem}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:2rem}
.footer h4{color:var(--accent);margin-bottom:1rem;font-size:1rem}
.footer ul{list-style:none}
.footer li{margin-bottom:0.5rem}
.footer a{color:rgba(255,255,255,0.8);font-size:0.9rem}
.footer a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,0.1);padding-top:1.5rem;margin-top:2rem;text-align:center;color:rgba(255,255,255,0.5);font-size:0.85rem}
@media(max-width:768px){
.footer-grid{grid-template-columns:1fr}
.hero h1{font-size:1.8rem}
.stats-bar{gap:1.5rem}
}
.contact-form{max-width:600px;margin:2rem auto;background:var(--surface);padding:2rem;border-radius:var(--radius);border:1px solid var(--border)}
.form-group{margin-bottom:1.2rem}
.form-group label{display:block;font-weight:500;margin-bottom:0.4rem;color:var(--primary)}
.form-group input,.form-group textarea{width:100%;padding:0.75rem;border:1px solid var(--border);border-radius:8px;font-size:1rem;font-family:inherit}
.form-group textarea{height:120px;resize:vertical}
.privacy-content h2,.terms-content h2{font-size:1.3rem;color:var(--primary);margin:2rem 0 1rem}
.privacy-content p,.terms-content p{margin-bottom:1rem;line-height:1.8}
.privacy-content ul,.terms-content ul{margin:0.5rem 0 1rem 1.5rem}
.privacy-content li,.terms-content li{margin-bottom:0.5rem}
.tool-calc{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:2rem;margin:1.5rem 0}
.calc-row{display:flex;gap:1rem;margin-bottom:1rem;flex-wrap:wrap}
.calc-row .form-group{flex:1;min-width:200px}
.calc-result{background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;padding:1.5rem;border-radius:var(--radius);text-align:center;margin-top:1.5rem}
.calc-result .value{font-size:2.5rem;font-weight:800;color:var(--accent)}
.calc-result .label{font-size:0.9rem;opacity:0.8}
@media(max-width:768px){
.calc-row{flex-direction:column}
}