/* 生活計算機：系統字型、行動優先、無外部資源 */
:root{--bg:#f6f8f7;--card:#fff;--ink:#1c2b2a;--muted:#5b6b69;--line:#dfe6e4;--pri:#0f6e63;--pri2:#e6f3f1;--acc:#c2410c;--warn:#fff7e6;--warnb:#f0c36d;--r:12px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang TC","Noto Sans TC","Microsoft JhengHei",Roboto,"Helvetica Neue",Arial,sans-serif}
@media (prefers-color-scheme:dark){:root{--bg:#0f1716;--card:#16211f;--ink:#e3ecea;--muted:#9fb0ad;--line:#2a3836;--pri:#4fc1b1;--pri2:#173431;--acc:#fb923c;--warn:#2a2416;--warnb:#7a6127}}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.7 var(--font)}
a{color:var(--pri)}a:hover{text-decoration-thickness:2px}
header.top{background:var(--card);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5}
header.top .in{max-width:980px;margin:0 auto;padding:10px 16px;display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.logo{font-weight:800;font-size:18px;text-decoration:none;color:var(--ink);display:flex;align-items:center;gap:8px}
.logo b{background:var(--pri);color:#fff;border-radius:8px;width:30px;height:30px;display:inline-grid;place-items:center;font-size:16px}
header.top nav{display:flex;gap:4px;overflow-x:auto;margin-left:auto;scrollbar-width:none}header.top nav::-webkit-scrollbar{display:none}
header.top nav a{white-space:nowrap;text-decoration:none;color:var(--muted);font-size:14px;padding:6px 10px;border-radius:999px}
header.top nav a:hover,header.top nav a[aria-current]{background:var(--pri2);color:var(--pri)}
main{max-width:980px;margin:0 auto;padding:16px}
.crumb{font-size:13px;color:var(--muted);margin:4px 0 0}.crumb a{color:var(--muted)}
h1{font-size:26px;line-height:1.35;margin:8px 0 6px}h2{font-size:20px;margin:28px 0 10px}h3{font-size:17px;margin:18px 0 6px}
.lead{color:var(--muted);margin:0 0 14px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:16px;box-shadow:0 1px 2px rgba(0,0,0,.03)}
.calc{display:grid;gap:16px}
@media(min-width:860px){.calc.two{grid-template-columns:minmax(0,1fr) minmax(0,1fr);align-items:start}.calc.two .res{position:sticky;top:72px}}
.fields{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px}
.fields .full{grid-column:1/-1}
label{display:block;font-size:14px;color:var(--muted);margin-bottom:4px}
input,select{width:100%;font:inherit;font-size:16px;padding:10px 12px;border:1px solid var(--line);border-radius:10px;background:var(--bg);color:var(--ink);min-height:44px}
input:focus,select:focus{outline:2px solid var(--pri);outline-offset:1px;border-color:transparent}
.chk{display:flex;gap:8px;align-items:center;font-size:15px;color:var(--ink)}.chk input{width:20px;height:20px;min-height:0}
.res{background:var(--pri2);border:1px solid transparent;border-radius:var(--r);padding:16px}
.big{font-size:30px;font-weight:800;color:var(--pri);line-height:1.2;margin:2px 0 6px;font-variant-numeric:tabular-nums}
.kv{display:grid;grid-template-columns:1fr auto;gap:4px 12px;font-variant-numeric:tabular-nums}.kv span:nth-child(even){text-align:right;font-weight:600}
.warnbox{background:var(--warn);border:1px solid var(--warnb);border-radius:10px;padding:10px 12px;font-size:14px;margin-top:10px}
.src{font-size:13px;color:var(--muted);border-left:3px solid var(--pri);padding:6px 12px;margin:16px 0;background:var(--card);border-radius:0 8px 8px 0}
.src ul{margin:4px 0;padding-left:18px}
table{border-collapse:collapse;width:100%;font-size:14px;font-variant-numeric:tabular-nums;background:var(--card)}
th,td{border-bottom:1px solid var(--line);padding:7px 8px;text-align:right}th{background:var(--pri2);color:var(--ink);font-weight:600}
th:first-child,td:first-child{text-align:left}
.tw{overflow-x:auto;border:1px solid var(--line);border-radius:10px;max-height:460px}
.tw thead th{position:sticky;top:0}
details{margin:10px 0}summary{cursor:pointer;color:var(--pri);font-weight:600}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px}
.grid a{display:block;background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:14px;text-decoration:none;color:var(--ink);transition:border-color .15s,transform .15s}
.grid a:hover{border-color:var(--pri);transform:translateY(-1px)}.grid a h3{margin:0 0 4px;font-size:16px;color:var(--pri)}.grid a p{margin:0;font-size:14px;color:var(--muted)}
.grid .ic{font-size:22px}
.hero{padding:18px 0 4px}.hero h1{font-size:30px}.trust{display:flex;flex-wrap:wrap;gap:8px;padding:0;margin:10px 0 0;list-style:none}
.trust li{background:var(--card);border:1px solid var(--line);border-radius:999px;padding:4px 12px;font-size:14px}
.chips{display:flex;flex-wrap:wrap;gap:6px}.chips a{font-size:14px;background:var(--card);border:1px solid var(--line);border-radius:999px;padding:4px 10px;text-decoration:none}
.faq h3{font-size:16px}.faq p{margin-top:0}
.note{font-size:13px;color:var(--muted)}
.btns{display:flex;gap:8px;flex-wrap:wrap}.btn{border:1px solid var(--pri);background:var(--card);color:var(--pri);border-radius:999px;padding:6px 14px;font:inherit;font-size:14px;cursor:pointer;min-height:36px}
.btn.on,.btn:hover{background:var(--pri);color:#fff}
.ad{display:none;margin:16px 0;text-align:center}.ad-label{display:block;font-size:11px;opacity:.5}
.ads-on.ad-top .ad[data-slot=top],.ads-on.ad-content .ad[data-slot=content],.ads-on.ad-bottom .ad[data-slot=bottom]{display:block;min-height:280px}
footer{border-top:1px solid var(--line);margin-top:32px;background:var(--card)}footer .in{max-width:980px;margin:0 auto;padding:18px 16px;font-size:13px;color:var(--muted)}
footer nav{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:6px}
[hidden]{display:none!important}
@media(max-width:480px){h1{font-size:23px}.hero h1{font-size:26px}.big{font-size:26px}main{padding:12px}.card{padding:14px}}