*{margin:0;padding:0;box-sizing:border-box}
:root{--primary:#0d4f8b;--primary-dark:#0a3d6e;--secondary:#1a9e7a;--accent:#e67e22;--bg:#f4f7fa;--card-bg:#fff;--text:#1a1a2e;--text-muted:#5a6677;--border:#e1e8ef;--shadow:0 2px 12px rgba(13,79,139,.08);--radius:10px}
body{font-family:'PingFang TC','Microsoft JhengHei',-apple-system,BlinkMacSystemFont,sans-serif;background:var(--bg);color:var(--text);line-height:1.6}
a{text-decoration:none;color:inherit}
.navbar{background:var(--primary);padding:0 24px;position:sticky;top:0;z-index:200;box-shadow:0 2px 8px rgba(0,0,0,.15)}
.nav-container{max-width:1200px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;height:60px}
.logo{font-size:1.3rem;font-weight:700;color:#fff;letter-spacing:.5px}
.logo span{color:#7ec8e3}
.nav-links{display:flex;list-style:none;gap:4px}
.nav-links a{padding:8px 14px;color:rgba(255,255,255,.85);border-radius:6px;font-size:.92rem;transition:all .2s}
.nav-links a:hover,.nav-links a.active{background:rgba(255,255,255,.15);color:#fff}
.hamburger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:4px}
.hamburger span{width:22px;height:2px;background:#fff;border-radius:2px}
@media(max-width:768px){
.nav-links{position:absolute;top:60px;left:0;right:0;background:var(--primary);flex-direction:column;padding:12px;display:none}
.nav-links.open{display:flex}
.hamburger{display:flex}
}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.page-header{background:linear-gradient(135deg,var(--primary) 0%,var(--secondary) 100%);color:#fff;padding:52px 24px;text-align:center}
.page-header h1{font-size:2.2rem;margin-bottom:8px}
.page-header p{opacity:.9;font-size:1.05rem}
.breadcrumb{background:#fff;border-bottom:1px solid var(--border);padding:10px 24px;font-size:.85rem;color:var(--text-muted)}
.breadcrumb a{color:var(--primary)}
.breadcrumb a:hover{text-decoration:underline}
.section{padding:52px 24px}
.section-title{text-align:center;font-size:1.6rem;color:var(--primary);margin-bottom:8px}
.section-sub{text-align:center;color:var(--text-muted);margin-bottom:36px}
.tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:20px}
.tool-card{background:var(--card-bg);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);transition:transform .2s,box-shadow .2s;border:1px solid var(--border);cursor:pointer}
.tool-card:hover{transform:translateY(-3px);box-shadow:0 6px 20px rgba(13,79,139,.14)}
.tool-icon{font-size:2.4rem;margin-bottom:12px}
.tool-card h3{font-size:1.05rem;color:var(--primary);margin-bottom:6px}
.tool-card p{font-size:.88rem;color:var(--text-muted)}
.article-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px}
.article-card{background:var(--card-bg);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:transform .2s;border:1px solid var(--border);display:block}
.article-card:hover{transform:translateY(-3px)}
.article-img{height:160px;background:linear-gradient(135deg,#e8f4f8,#d4ecf5);display:flex;align-items:center;justify-content:center;font-size:3.5rem}
.article-content{padding:20px}
.article-card h3{font-size:1.1rem;color:var(--primary);margin-bottom:6px;line-height:1.4}
.article-card p{font-size:.88rem;color:var(--text-muted);margin-bottom:10px}
.article-meta{font-size:.8rem;color:var(--secondary);font-weight:500}
.tool-page{max-width:700px;margin:0 auto;background:var(--card-bg);border-radius:var(--radius);padding:36px;box-shadow:var(--shadow)}
.tool-page h1{font-size:1.8rem;color:var(--primary);margin-bottom:8px}
.tool-desc{color:var(--text-muted);margin-bottom:28px;font-size:.95rem}
.form-group{margin-bottom:18px}
.form-group label{display:block;font-weight:600;margin-bottom:6px;font-size:.9rem;color:var(--text)}
.form-group input,.form-group select,.form-group textarea{width:100%;padding:11px 14px;border:1.5px solid var(--border);border-radius:8px;font-size:.95rem;font-family:inherit;transition:border-color .2s}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{outline:none;border-color:var(--primary)}
.btn{display:inline-flex;align-items:center;gap:8px;background:var(--primary);color:#fff;padding:12px 28px;border:none;border-radius:8px;font-size:1rem;cursor:pointer;font-weight:600;transition:background .2s}
.btn:hover{background:var(--primary-dark)}
.btn-secondary{background:var(--secondary)}
.result-box{background:linear-gradient(135deg,#eaf6f2,#d9eef5);border-radius:var(--radius);padding:24px;margin-top:20px;border:1px solid #c3e4d8}
.result-label{font-size:.9rem;color:var(--text-muted);margin-bottom:4px}
.result-value{font-size:2rem;font-weight:700;color:var(--primary)}
.content-box{max-width:800px;margin:0 auto;background:var(--card-bg);border-radius:var(--radius);padding:40px;box-shadow:var(--shadow)}
.content-box h2{color:var(--primary);font-size:1.4rem;margin:24px 0 12px}
.content-box h2:first-child{margin-top:0}
.content-box p{margin-bottom:14px;line-height:1.8;font-size:1rem}
.article-page{max-width:800px;margin:0 auto;background:var(--card-bg);border-radius:var(--radius);padding:40px;box-shadow:var(--shadow)}
.article-page h1{color:var(--primary);font-size:1.9rem;line-height:1.3;margin-bottom:10px}
.article-info{color:var(--text-muted);font-size:.88rem;margin-bottom:28px;padding-bottom:16px;border-bottom:2px solid var(--border)}
.article-body h2{color:var(--primary);font-size:1.35rem;margin:28px 0 12px;padding-top:8px}
.article-body p{margin-bottom:14px;line-height:1.85;font-size:1rem}
.article-body img{border-radius:8px;width:100%;height:200px;object-fit:cover;background:#e8f4f8}
.footer{background:#0d2b45;color:rgba(255,255,255,.75);padding:48px 24px 0}
.footer-grid{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px;padding-bottom:32px}
.footer h4{color:#fff;font-size:1rem;margin-bottom:12px}
.footer a{display:block;font-size:.88rem;margin-bottom:8px;opacity:.7;transition:opacity .2s}
.footer a:hover{opacity:1}
.footer-bottom{text-align:center;padding:20px;border-top:1px solid rgba(255,255,255,.1);font-size:.85rem;max-width:1200px;margin:0 auto}
@media(max-width:768px){
.footer-grid{grid-template-columns:1fr 1fr;gap:24px}
.content-box{padding:24px}
.article-page{padding:24px}
.tool-page{padding:24px}
}