*{margin:0;padding:0;box-sizing:border-box}
body{font-family:"Microsoft YaHei","PingFang SC",sans-serif;color:#2c3e50;background:#f6f8fa;line-height:1.7}
a{color:#2563eb;text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1000px;margin:0 auto;padding:0 16px}
.site-header{background:#fff;border-bottom:1px solid #e5e7eb;position:sticky;top:0;z-index:10}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:56px}
.logo{font-size:20px;font-weight:700;color:#1e293b;display:inline-flex;align-items:center;gap:8px;letter-spacing:0}
.logo-mark{width:30px;height:30px;border-radius:8px;flex-shrink:0}
.logo-text{display:inline}
.logo-7{color:#2563eb}
.nav{display:flex;gap:18px}
.nav a{color:#475569;font-size:14px}
.main{padding:24px 16px 40px}
.hero{text-align:center;padding:36px 0 20px}
.hero h1{font-size:28px;color:#1e293b;margin-bottom:10px}
.hero p{color:#64748b}
.cat{margin-top:28px}
.cat h2{font-size:20px;color:#1e293b;border-left:4px solid #2563eb;padding-left:10px}
.cat-desc{color:#64748b;font-size:14px;margin:6px 0 12px}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px}
.card{background:#fff;border:1px solid #e5e7eb;border-radius:10px;padding:18px;display:flex;flex-direction:column;gap:6px;transition:box-shadow .2s}
.card:hover{box-shadow:0 4px 14px rgba(37,99,235,.12);text-decoration:none}
.card-icon{font-size:28px}
.card-title{font-weight:600;color:#1e293b}
.card-desc{font-size:13px;color:#64748b}
.breadcrumb{font-size:13px;color:#94a3b8;margin-bottom:12px}
article h1{font-size:24px;color:#1e293b;margin-bottom:8px}
.intro{color:#64748b;margin-bottom:18px}
.tool-box{background:#fff;border:1px solid #e5e7eb;border-radius:12px;padding:20px;margin-bottom:24px}
.form-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px;margin-bottom:16px}
.form-grid label{font-size:14px;color:#475569;display:flex;flex-direction:column;gap:6px}
.form-grid input,.form-grid select,.form-grid textarea{padding:8px 10px;border:1px solid #cbd5e1;border-radius:8px;font-size:14px;font-family:inherit}
.form-grid .chk{flex-direction:row;align-items:center;gap:8px}
.btn-row{display:flex;gap:10px;margin:14px 0;flex-wrap:wrap}
.btn{display:inline-block;background:#2563eb;color:#fff;border:none;border-radius:8px;padding:9px 22px;font-size:14px;cursor:pointer}
.btn:hover{background:#1d4ed8;text-decoration:none}
.btn-ghost{background:#fff;color:#2563eb;border:1px solid #2563eb}
.result-card{background:#f0f7ff;border:1px solid #bfdbfe;border-radius:10px;padding:14px 16px;margin:10px 0}
.result-card h3{font-size:16px;margin-bottom:8px;color:#1e40af}
.hl{color:#dc2626;font-size:18px}
.tip{font-size:13px;color:#94a3b8;margin-top:10px}
.ks-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px 18px;margin:12px 0}
.ks-item{font-size:16px;font-family:Georgia,serif;white-space:nowrap}
.ks-ans{color:#dc2626}
.ks-ans-title{margin-top:18px;font-size:16px}
.zt-out{margin-top:10px}
.zt-cell{float:left;width:76px;height:76px;border:1.5px solid #94a3b8;position:relative;margin:4px;font-size:44px;line-height:72px;text-align:center;font-family:KaiTi,STKaiti,serif;color:#1e293b}
.zt-cell::before{content:"";position:absolute;left:0;right:0;top:50%;height:0;border-top:1px dashed #f0abfc}
.zt-cell::after{content:"";position:absolute;top:0;bottom:0;left:50%;width:0;border-left:1px dashed #f0abfc}
.zt-cell.trace{color:#e8c8d8}
.zt-gap{float:left;width:10px;height:76px}
.seo-block{background:#fff;border:1px solid #e5e7eb;border-radius:12px;padding:20px;margin-bottom:24px}
.seo-block h2{font-size:18px;color:#1e293b;margin:14px 0 8px}
.seo-block h2:first-child{margin-top:0}
.seo-block p{color:#475569;font-size:14px;margin-bottom:8px}
.faq-item h3{font-size:15px;color:#1e293b;margin:10px 0 4px}
.faq-item p{font-size:14px;color:#64748b}
.related h2{font-size:18px;color:#1e293b;margin-bottom:12px}
.jt-doc{background:#fff;border:1px solid #cbd5e1;border-radius:8px;padding:24px;font-size:15px;line-height:2;font-family:KaiTi,STKaiti,serif}
.data-table{width:100%;border-collapse:collapse;font-size:14px;margin:10px 0}
.data-table th,.data-table td{border:1px solid #e5e7eb;padding:8px 10px;text-align:left}
.data-table th{background:#f0f7ff}
.site-footer{border-top:1px solid #e5e7eb;background:#fff;padding:20px 0;text-align:center;color:#94a3b8;font-size:13px}
.foot-links{margin:6px 0}
@media print{
 .site-header,.site-footer,.breadcrumb,.btn-row,.btn,.seo-block,.related,.form-grid,.tip,.bottom-nav{display:none!important}
 body{background:#fff}
 .tool-box{border:none;padding:0}
}
.bottom-nav{display:none;position:fixed;bottom:0;left:0;right:0;background:#fff;border-top:1px solid #e5e7eb;z-index:99;padding:6px 4px calc(6px + env(safe-area-inset-bottom));justify-content:space-around}
.bottom-nav a{flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;font-size:11px;color:#64748b;text-decoration:none;padding:2px 0}
.bottom-nav a .ni{font-size:20px;font-weight:400;line-height:1.2}
.bottom-nav a:active{color:#2563eb}
@media(max-width:600px){
 .header-inner{flex-direction:column;height:auto;padding:10px 0;gap:6px}
 .ks-grid{grid-template-columns:repeat(2,1fr)}
 .zt-cell{width:60px;height:60px;font-size:34px;line-height:56px}
 .zt-gap{height:60px}
 .bottom-nav{display:flex}
 body{padding-bottom:70px}
}