:root{--bg:#f4f6f8;--card:#fff;--text:#152033;--muted:#667085;--line:#e5e7eb;--blue:#0b1f3a;--blue2:#185a9d;--green:#16a34a;--orange:#f59e0b;--shadow:0 10px 28px rgba(16,24,40,.07)}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",Arial,sans-serif;padding-bottom:86px}.dark{--bg:#0b1220;--card:#121c2e;--text:#eef4ff;--muted:#aab4c5;--line:#243149;--shadow:0 10px 28px rgba(0,0,0,.25)}.hero{background:linear-gradient(135deg,#07182d,#123d68 55%,#1c5f96);color:white;padding:22px 16px 18px;border-bottom-left-radius:24px;border-bottom-right-radius:24px;display:flex;justify-content:space-between;align-items:flex-start}.eyebrow{margin:0;color:#d8e2ee;font-size:13px}.clock{margin:8px 0 0;color:#d8e2ee;font-size:13px}h1{margin:5px 0 0;font-size:27px}button{font-family:inherit}.ghost{border:1px solid rgba(255,255,255,.3);background:rgba(255,255,255,.12);color:white;border-radius:12px;padding:10px 12px}main{max-width:620px;margin:auto;padding:14px}.page{display:none}.page.active{display:block}.card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:16px;margin:12px 0;box-shadow:var(--shadow)}.card-title{display:flex;justify-content:space-between;align-items:center;gap:10px}h2{font-size:17px;margin:0 0 12px}.badge{font-size:11px;background:#e8f2ff;color:#0b1f3a;padding:4px 9px;border-radius:999px}.metrics{display:grid;grid-template-columns:1fr 1fr;gap:10px}.metric{background:rgba(148,163,184,.12);border:1px solid var(--line);border-radius:14px;padding:12px}.metric small{display:block;color:var(--muted);font-size:12px}.metric strong{display:block;font-size:25px;margin-top:5px}.hint{font-size:12px;color:var(--muted);line-height:1.55}.quick{display:grid;grid-template-columns:1fr 1fr;gap:10px}.quick.two{grid-template-columns:1fr 1fr}a{display:block;text-decoration:none;text-align:center;color:var(--text);background:rgba(148,163,184,.12);border:1px solid var(--line);border-radius:14px;padding:14px 8px;font-weight:750;font-size:14px}.primary{background:var(--blue)!important;color:white!important;border-color:var(--blue)!important}.dark .primary{background:#2563eb!important;border-color:#2563eb!important}label{display:flex;gap:9px;align-items:flex-start;background:rgba(148,163,184,.12);border:1px solid var(--line);border-radius:13px;padding:11px;margin:8px 0;font-size:14px;line-height:1.4}input[type=checkbox]{margin-top:3px}.mini{border:1px solid var(--line);background:transparent;color:var(--text);border-radius:10px;padding:7px 10px}.standard{font-size:14px;line-height:1.7;color:var(--text)}.form{display:grid;grid-template-columns:1fr 1fr;gap:8px}.form label{display:block;margin:0}.form input{width:100%;border:1px solid var(--line);border-radius:10px;margin-top:7px;padding:11px;background:var(--card);color:var(--text);font-size:15px}.calc,.copy{width:100%;border:0;background:var(--blue);color:white;border-radius:14px;padding:13px;font-weight:800;margin-top:12px}.result{margin-top:12px;border:1px solid var(--line);border-radius:14px;padding:13px;background:rgba(148,163,184,.12);line-height:1.7;font-size:14px}textarea{width:100%;min-height:160px;border:1px solid var(--line);border-radius:14px;padding:12px;background:rgba(148,163,184,.12);color:var(--text);font-size:14px;font-family:inherit}pre{white-space:pre-wrap;background:rgba(148,163,184,.12);border:1px solid var(--line);border-radius:14px;padding:12px;font-size:12px;line-height:1.6;color:var(--text)}nav{position:fixed;left:0;right:0;bottom:0;background:rgba(255,255,255,.96);border-top:1px solid var(--line);display:grid;grid-template-columns:repeat(6,1fr);padding:7px 6px max(7px,env(safe-area-inset-bottom));backdrop-filter:blur(12px)}.dark nav{background:rgba(18,28,46,.96)}nav button{border:0;background:transparent;color:var(--muted);font-size:12px;padding:8px 0;border-radius:12px}nav button.active{color:var(--blue2);font-weight:900;background:rgba(24,90,157,.12)}@media(min-width:760px){main{max-width:1000px}.quick{grid-template-columns:repeat(3,1fr)}.form{grid-template-columns:repeat(3,1fr)}}