*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;background:#f8f9fa;color:#1a1a1a;line-height:1.6;font-size:15px}
a{color:#2563eb;text-decoration:none;transition:color .2s}
a:hover{color:#1d4ed8}
.container{max-width:960px;margin:0 auto;padding:20px}
.site-header{background:#fff;border-bottom:1px solid #e5e7eb;box-shadow:0 1px 3px rgba(0,0,0,0.05)}
.site-header .container{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo a{display:flex;align-items:center;gap:12px;font-size:20px;font-weight:700;color:#1a1a1a}
.logo img{width:40px;height:40px;border-radius:10px}
.main-nav{display:flex;gap:24px;flex-wrap:wrap}
.main-nav a{color:#6b7280;font-size:14px;font-weight:500;text-decoration:none;transition:color .2s;padding:4px 0;border-bottom:2px solid transparent}
.main-nav a:hover{color:#2563eb;border-bottom-color:#2563eb}
.page-title{font-size:32px;font-weight:700;margin-bottom:28px;color:#1a1a1a;letter-spacing:-0.02em}
.tool-tabs{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:28px}
.tab-btn{display:inline-block;padding:10px 20px;border:1px solid #e5e7eb;background:#fff;border-radius:8px;cursor:pointer;font-size:14px;font-weight:500;color:#4b5563;transition:all .2s;text-decoration:none}
.tab-btn:hover{border-color:#2563eb;color:#2563eb;background:#eff6ff}
.tab-btn.active{background:#2563eb;color:#fff;border-color:#2563eb}
.category-section{background:#fff;border-radius:12px;padding:32px;margin-top:28px;border:1px solid #e5e7eb}
.category-section h2{font-size:22px;margin-bottom:24px;color:#1a1a1a;font-weight:700}
.category-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:16px}
.category-card{display:flex;align-items:center;gap:12px;padding:16px;background:#f9fafb;border-radius:10px;color:#1a1a1a;font-size:14px;font-weight:500;transition:all .2s;border:1px solid transparent}
.category-card:hover{background:#eff6ff;border-color:#2563eb;color:#2563eb;transform:translateY(-2px)}
.category-card .icon{font-size:24px}
.category-card .name{font-size:14px}
.converter-box{background:#fff;border-radius:12px;padding:32px;margin-bottom:28px;border:1px solid #e5e7eb}
.converter-row{display:flex;align-items:flex-end;gap:16px;flex-wrap:wrap}
.input-group{display:flex;flex-direction:column;gap:8px;flex:1;min-width:160px}
.input-group label{font-size:13px;color:#6b7280;font-weight:600}
.input-group input,.input-group select{padding:12px 16px;border:1px solid #d1d5db;border-radius:8px;font-size:15px;width:100%;transition:all .2s;background:#fff}
.input-group input:focus,.input-group select:focus{outline:none;border-color:#2563eb;box-shadow:0 0 0 3px rgba(37,99,235,0.1)}
.swap-btn{width:48px;height:48px;border:1px solid #d1d5db;background:#fff;border-radius:8px;cursor:pointer;font-size:20px;color:#6b7280;flex-shrink:0;transition:all .2s}
.swap-btn:hover{border-color:#2563eb;color:#2563eb;background:#eff6ff}
.convert-btn{padding:12px 32px;background:#2563eb;color:#fff;border:none;border-radius:8px;font-size:15px;cursor:pointer;flex-shrink:0;height:48px;font-weight:600;transition:all .2s}
.convert-btn:hover{background:#1d4ed8;transform:translateY(-1px);box-shadow:0 4px 12px rgba(37,99,235,0.3)}
.result-area{margin-top:32px;padding-top:28px;border-top:1px solid #e5e7eb}
.result-label{font-size:13px;color:#6b7280;margin-bottom:16px;font-weight:600}
.result-main{font-size:32px;font-weight:700;margin-bottom:20px;line-height:1.3}
.result-main .from-val{color:#1a1a1a}
.result-main .to-val{color:#2563eb}
.related-links{font-size:13px;color:#6b7280}
.related-links a{color:#2563eb;margin-right:8px;font-weight:500}
.conversion-table{background:#fff;border-radius:12px;padding:32px;margin-bottom:28px;border:1px solid #e5e7eb}
.conversion-table h2{font-size:22px;font-weight:700;margin-bottom:20px;color:#1a1a1a}
.conversion-table table{width:100%;border-collapse:collapse}
.conversion-table thead{background:#f9fafb}
.conversion-table th{padding:14px 16px;text-align:left;font-size:14px;font-weight:700;color:#1a1a1a;border-bottom:2px solid #e5e7eb}
.conversion-table td{padding:14px 16px;font-size:14px;color:#4b5563;border-bottom:1px solid #f3f4f6}
.conversion-table td a{color:#2563eb;font-weight:500}
.conversion-table td a:hover{color:#1d4ed8}
.conversion-table tbody tr:hover{background:#f9fafb}
.conversion-table .four-col-table th:nth-child(1),.conversion-table .four-col-table td:nth-child(1){width:20%}
.conversion-table .four-col-table th:nth-child(2),.conversion-table .four-col-table td:nth-child(2){width:30%}
.conversion-table .four-col-table th:nth-child(3),.conversion-table .four-col-table td:nth-child(3){width:20%}
.conversion-table .four-col-table th:nth-child(4),.conversion-table .four-col-table td:nth-child(4){width:30%}
.related-converts{background:#fff;border-radius:12px;padding:32px;margin-bottom:28px;border:1px solid #e5e7eb}
.related-converts h2{font-size:22px;font-weight:700;margin-bottom:20px;color:#1a1a1a}
.related-list{list-style:none;display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:12px}
.related-list li a{display:block;padding:12px 16px;background:#f9fafb;border-radius:8px;color:#4b5563;font-size:14px;font-weight:500;transition:all .2s;border:1px solid transparent}
.related-list li a:hover{background:#eff6ff;color:#2563eb;border-color:#2563eb}
.seo-content{background:#fff;border-radius:12px;padding:32px;border:1px solid #e5e7eb}
.seo-content h2{font-size:24px;font-weight:700;margin:32px 0 16px;color:#1a1a1a}
.seo-content h2:first-child{margin-top:0}
.seo-content h3{font-size:18px;font-weight:700;margin:24px 0 12px;color:#1a1a1a}
.seo-content h4{font-size:16px;font-weight:600;margin:20px 0 10px;color:#1a1a1a}
.seo-content p{color:#4b5563;margin-bottom:20px;line-height:1.8}
.faq-image{display:block;width:100%;max-width:480px;height:auto;margin:28px auto;border-radius:12px;border:1px solid #e5e7eb}
.conversion-reference-table{width:100%;border-collapse:collapse;margin:20px 0}
.conversion-reference-table thead{background:#f9fafb}
.conversion-reference-table th{padding:12px 16px;text-align:left;font-size:13px;font-weight:700;color:#1a1a1a;border-bottom:2px solid #e5e7eb}
.conversion-reference-table td{padding:12px 16px;font-size:13px;color:#4b5563;border-bottom:1px solid #f3f4f6}
.conversion-reference-table tbody tr:hover{background:#f9fafb}
.seo-content a{color:#2563eb;font-weight:500}
.related-tools,.other-converts,.common-converts{list-style:none;display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:12px}
.related-tools li a,.other-converts li a,.common-converts li a{display:block;padding:12px 16px;background:#f9fafb;border-radius:8px;color:#4b5563;font-size:14px;font-weight:500;transition:all .2s;border:1px solid transparent}
.related-tools li a:hover,.other-converts li a:hover,.common-converts li a:hover{background:#eff6ff;color:#2563eb;border-color:#2563eb}
.hot-converts,.recent-converts{background:#fff;border-radius:12px;padding:32px;margin-bottom:28px;border:1px solid #e5e7eb}
.hot-converts h2,.recent-converts h2{font-size:22px;font-weight:700;margin-bottom:20px;color:#1a1a1a}
.hot-list,.recent-list{list-style:none;display:grid;grid-template-columns:repeat(3,1fr);gap:0;border:1px solid #e5e7eb;border-radius:10px;overflow:hidden}
.recent-list.three-col{grid-template-columns:repeat(3,1fr)}
.hot-list li,.recent-list li{border-bottom:1px solid #e5e7eb;border-right:1px solid #e5e7eb}
.hot-list li:nth-child(3n),.recent-list li:nth-child(3n){border-right:none}
.hot-list li:nth-last-child(-n+3),.recent-list li:nth-last-child(-n+3){border-bottom:none}
.recent-list.two-col li{border-right:1px solid #e5e7eb}
.recent-list.two-col li:nth-child(2n){border-right:none}
.hot-list li a,.recent-list li a{display:block;padding:14px 16px;color:#4b5563;font-size:14px;line-height:1.6;font-weight:500;transition:all .2s}
.hot-list li a:hover,.recent-list li a:hover{background:#f9fafb;color:#2563eb}
.site-footer{background:#fff;border-top:1px solid #e5e7eb;padding:28px 0;margin-top:40px;text-align:center;font-size:13px;color:#6b7280}
.site-footer .copyright{margin:0}
.site-footer a{color:#2563eb;font-weight:500}
.site-footer a:hover{color:#1d4ed8}
.footer-links{margin-bottom:12px}
.footer-links a{margin:0 16px}
@media(max-width:768px){
.faq-image{max-width:100%}
.site-header .container{flex-direction:column;height:auto;padding:16px 20px;gap:12px}
.main-nav{gap:12px;justify-content:center}
.main-nav a{font-size:13px;padding:4px 8px}
.page-title{font-size:24px}
.converter-row{flex-direction:column}
.input-group{width:100%}
.swap-btn{width:100%;margin:8px 0}
.convert-btn{width:100%}
.result-main{font-size:24px}
.category-grid{grid-template-columns:repeat(2,1fr)}
.hot-list,.recent-list,.recent-list.two-col,.recent-list.three-col{grid-template-columns:1fr}
.hot-list li,.recent-list li,.recent-list.two-col li,.recent-list.three-col li{border-right:none!important}
.conversion-table .four-col-table th:nth-child(3),.conversion-table .four-col-table th:nth-child(4),.conversion-table .four-col-table td:nth-child(3),.conversion-table .four-col-table td:nth-child(4){display:none}
.conversion-table .four-col-table th:nth-child(1),.conversion-table .four-col-table td:nth-child(1){width:35%}
.conversion-table .four-col-table th:nth-child(2),.conversion-table .four-col-table td:nth-child(2){width:65%}
}