:root{--bg:#f5f8fa;--card:#fff;--ink:#17222b;--mute:#4f5d68;--brand:#0b6e99;--brand-2:#085a7d;--line:#dbe4ea;--chip:#e6f1f6;--focus:#c2410c;--err:#9f1c1c;--gold:#f2a900}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system, BlinkMacSystemFont, "PingFang TC", "Noto Sans TC", "Microsoft JhengHei", "Heiti TC", sans-serif;line-height:1.7;font-size:16px}
a{color:var(--brand-2)}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid var(--focus);outline-offset:2px}
.wrap{max-width:1040px;margin:0 auto;padding:0 16px}
.skip{position:absolute;left:-9999px;top:0;background:#fff;padding:8px 12px;z-index:100}
.skip:focus{left:8px;top:8px}
.sr,.offscreen{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;padding:0;margin:-1px}
.offscreen{left:-9999px;top:0}
header.top{background:#fff;border-bottom:1px solid var(--line)}
header.top .wrap{display:flex;align-items:center;gap:8px 14px;min-height:52px;flex-wrap:wrap}
.logo{display:inline-flex;align-items:center;gap:8px;font-weight:700;color:var(--ink);text-decoration:none;font-size:18px;white-space:nowrap;min-height:44px}
.logo .dot{width:20px;height:20px;border-radius:6px;background:var(--brand);box-shadow:inset 0 -6px 0 var(--gold)}
nav.main{display:flex;gap:2px;margin-left:auto}
nav.main a{text-decoration:none;color:var(--mute);padding:10px 8px;border-radius:8px;font-size:15px;white-space:nowrap;min-height:44px;display:inline-flex;align-items:center}
nav.main a[aria-current]{color:var(--brand-2);background:var(--chip);font-weight:600}
.crumb{font-size:14px;color:var(--mute);margin:-2px 0 -8px;line-height:44px}
.crumb a{color:var(--mute);display:inline-flex;align-items:center;min-height:44px;min-width:44px}
h1{font-size:24px;line-height:1.35;margin:10px 0 4px}
h2{font-size:20px;line-height:1.4;margin:28px 0 8px}
h3{font-size:17px;margin:0 0 4px}
.answer{margin:0 0 10px;font-size:15px;line-height:1.6}
.muted{color:var(--mute)}
/* tool */
.tool{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:12px;margin-bottom:6px}
.lbl{display:block;font-weight:600;margin:0 0 4px}
textarea{display:block;width:100%;font:inherit;font-size:16px;line-height:1.6;border:1px solid var(--line);border-radius:10px;padding:8px 10px;resize:vertical;min-height:160px;background:#fff;color:var(--ink)}
input[type=number],select{font:inherit;font-size:16px;min-height:44px;border:1px solid var(--line);border-radius:10px;padding:6px 10px;background:#fff;color:var(--ink);max-width:100%;width:100%}
.row{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:8px 0}
.tool button{font:inherit;font-size:15px;min-height:44px;min-width:44px;padding:6px 14px;border:1px solid var(--line);border-radius:10px;background:#fff;color:var(--ink);cursor:pointer}
.tool button.primary{background:var(--brand);color:#fff;border-color:var(--brand);font-weight:600;margin-left:auto}
.stats{list-style:none;padding:0;margin:8px 0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
.stat{background:var(--bg);border:1px solid var(--line);border-radius:12px;padding:8px 10px;min-width:0;display:flex;flex-direction:column}
.stat.main{grid-column:1/-1;background:var(--chip);border-color:#b9d7e5}
.sl{font-size:13px;color:var(--mute);line-height:1.4}
.sv{font-size:22px;font-weight:700;line-height:1.3;font-variant-numeric:tabular-nums;overflow-wrap:anywhere}
.stat.main .sv{font-size:30px;color:var(--brand-2)}
.goal{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:8px;align-items:end;border-top:1px solid var(--line);padding-top:10px;margin-top:4px}
.goal progress{grid-column:1/-1;width:100%;height:14px;accent-color:var(--brand)}
.goal p{grid-column:1/-1;margin:0;font-size:15px}
.goal p.over{color:var(--err);font-weight:600}
.acc{font-size:14px;color:var(--mute);margin:0 0 8px}
/* content */
.content section{margin:0}
.content p,.prose p{margin:0 0 10px}
.content ul,.content ol,.prose ul{margin:0 0 10px;padding-left:1.4em}
.faq .qa{background:#fff;border:1px solid var(--line);border-radius:12px;padding:12px 14px;margin-bottom:8px}
.faq .qa p{margin:0}
.cards{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:1fr;gap:10px}
.card{display:block;background:#fff;border:1px solid var(--line);border-radius:12px;padding:12px 14px;text-decoration:none;color:var(--ink);height:100%;min-height:44px}
.card:hover{border-color:var(--brand)}
.card .cn{display:block;font-weight:700;color:var(--brand-2)}
.card .cd{display:block;font-size:14px;color:var(--mute)}
.prose{background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px 16px 6px;margin:14px 0 8px}
.prose h2{font-size:18px;margin:16px 0 6px}
footer{border-top:1px solid var(--line);background:#fff;font-size:14px;color:var(--mute);margin-top:24px}
footer .wrap{display:flex;flex-wrap:wrap;gap:4px 16px;align-items:center;padding-top:10px;padding-bottom:10px}
footer a{color:var(--mute);display:inline-flex;align-items:center;min-height:44px}
.toast{position:fixed;left:50%;bottom:20px;transform:translateX(-50%) translateY(20px);background:var(--ink);color:#fff;padding:10px 16px;border-radius:10px;font-size:15px;opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;z-index:60;max-width:90vw}
.toast.on{opacity:1;transform:translateX(-50%) translateY(0)}
@media (min-width:600px){.stats{grid-template-columns:repeat(3,minmax(0,1fr))}.goal{grid-template-columns:200px 220px minmax(0,1fr)}.goal progress{grid-column:auto;align-self:center}.cards{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:900px){h1{font-size:30px}.answer{font-size:16px}.tool{padding:20px}.stats{grid-template-columns:repeat(4,minmax(0,1fr))}.stat.main{grid-column:span 2}}
@media (prefers-reduced-motion:reduce){.toast{transition:none}}