:root{--bg:#f6f7f9;--card:#fff;--ink:#1a1f26;--muted:#6b7480;--line:#e4e7eb;--accent:#1f6feb;--emph:#c2410c;--warn-bg:#fff7ed;--err-bg:#fef2f2;--err:#b91c1c}*{box-sizing:border-box}body{background:var(--bg);color:var(--ink);margin:0;font:15px/1.5 system-ui,-apple-system,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif}.app{max-width:720px;margin:0 auto;padding:16px 14px 48px}header h1{margin:8px 0 4px;font-size:20px}.local-note{color:var(--muted);margin:0 0 16px;font-size:12px}.input-card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:14px}.tabs{flex-wrap:wrap;gap:6px;margin-bottom:12px;display:flex}.tab{border:1px solid var(--line);cursor:pointer;background:#fff;border-radius:8px;flex:auto;padding:8px 6px;font-size:13px}.tab.active{border-color:var(--accent);color:var(--accent);font-weight:600}.method{gap:16px;margin-bottom:12px;font-size:14px;display:flex}.leg{border:1px solid var(--line);border-radius:8px;margin:0 0 12px;padding:10px 12px}.leg legend{color:var(--muted);padding:0 4px;font-size:13px}.field{flex-direction:column;gap:4px;margin-bottom:10px;display:flex}.field span{color:var(--muted);font-size:13px}.field input,.expected input{border:1px solid var(--line);border-radius:8px;width:100%;padding:10px;font-size:16px}.combo-toggle{align-items:center;gap:8px;margin-bottom:12px;font-size:14px;display:flex}.submit{background:var(--accent);color:#fff;cursor:pointer;border:none;border-radius:8px;width:100%;padding:12px;font-size:16px;font-weight:600}.conclusion{margin-top:20px}.headline{background:var(--card);border:1px solid var(--line);text-align:center;border-radius:12px;padding:20px 16px}.headline-main{font-size:clamp(20px,6vw,28px);font-weight:700;line-height:1.25}.headline-sub{color:var(--muted);margin-top:6px;font-size:15px}.plans{grid-template-columns:1fr 1fr;gap:10px;margin-top:12px;display:grid}.plan-card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:12px}.plan-card h3{margin:0 0 8px;font-size:15px}.plan-card dl{grid-template-columns:auto 1fr;gap:4px 8px;margin:0;display:grid}.plan-card dt{color:var(--muted);font-size:12px}.plan-card dd{text-align:right;font-variant-numeric:tabular-nums;margin:0;font-size:13px}.plan-card dd.emph{color:var(--emph);font-weight:700}.drop{color:var(--muted);font-size:11px}.fact{color:var(--accent);margin:14px 0 4px;font-weight:600}.fact-secondary{color:var(--muted);margin:0;font-size:13px}.opportunity{background:var(--card);border:1px solid var(--line);border-radius:12px;margin-top:24px;padding:16px}.opportunity h2{margin:0 0 10px;font-size:17px}.expected{color:var(--muted);flex-direction:column;gap:6px;margin:14px 0;font-size:13px;display:flex}.diag{border-radius:10px;margin:14px 0;padding:12px 14px;font-size:13px;list-style:none}.diag.errors{background:var(--err-bg);color:var(--err)}.diag.warnings{background:var(--warn-bg);color:#92400e}.diag li+li{margin-top:6px}.share button{border:1px solid var(--accent);color:var(--accent);cursor:pointer;background:#fff;border-radius:8px;padding:10px 16px}.disclaimer{color:var(--muted);margin-top:16px;font-size:12px}@media (width<=380px){.plans{grid-template-columns:1fr}}