*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;background:#eef6fb;color:#15324a;padding-bottom:76px}.app-header{background:linear-gradient(135deg,#075c9b,#0aa7c8);color:#fff;padding:28px 20px 22px;border-radius:0 0 28px 28px;box-shadow:0 8px 22px rgba(0,88,135,.18)}.app-header h1{margin:0;font-size:28px}.app-header p{margin:8px 0 0;opacity:.92}main{padding:16px;max-width:860px;margin:0 auto}.search-card input{width:100%;height:48px;border:none;border-radius:16px;padding:0 16px;font-size:16px;box-shadow:0 5px 18px rgba(24,90,130,.12);outline:none}.notice{margin:14px 0;background:#fff7e6;border-left:5px solid #f0a000;border-radius:12px;padding:12px 14px;font-size:14px;line-height:1.55}h2{font-size:18px;margin:20px 0 12px}.module-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.module-card,.tool-card,.result-card,.form-card,.history-card,.ref-card{background:#fff;border-radius:18px;padding:16px;box-shadow:0 5px 18px rgba(24,90,130,.1)}.module-card{min-height:84px}.module-card strong{font-size:17px}.module-card span{display:block;margin-top:8px;color:#61788c;font-size:13px}.filter-row{display:flex;gap:8px;overflow-x:auto;margin-bottom:12px}.filter-row button{white-space:nowrap;border:none;border-radius:999px;padding:9px 12px;background:#dff2ff;color:#0b6fae}.filter-row button.active{background:#0b6fae;color:#fff}.tool-list{display:grid;gap:12px}.tool-card{display:flex;justify-content:space-between;align-items:center;gap:12px}.tool-card h3{margin:0 0 6px;font-size:17px}.tool-card p{margin:0;color:#61788c;font-size:13px}.fav-btn{border:none;background:#eaf6ff;color:#0b6fae;border-radius:999px;padding:8px 11px;font-size:18px}.back-btn,.calc-btn,.clear-btn{border:none;border-radius:12px;padding:12px 16px;background:#0b6fae;color:#fff;font-size:15px}.clear-btn{background:#d9534f;margin-bottom:12px}.form-card label{display:block;margin:12px 0 6px;font-weight:600}.form-card input,.form-card select{width:100%;height:44px;border:1px solid #c9deea;border-radius:12px;padding:0 12px;font-size:15px;background:#fbfdff}.calc-btn{width:100%;margin-top:18px}.result-card{margin-top:14px;border-left:5px solid #0aa7c8}.result-card h3{margin-top:0}.explain,.ref-card{color:#4f687b;line-height:1.7}.hidden{display:none}.bottom-nav{position:fixed;left:0;right:0;bottom:0;background:#fff;border-top:1px solid #d7e7ef;display:grid;grid-template-columns:repeat(4,1fr);height:64px;z-index:20}.bottom-nav button{border:none;background:#fff;color:#0b6fae;font-size:15px}.history-card{margin-bottom:10px}.badge{display:inline-block;background:#e8f6ff;color:#0b6fae;border-radius:999px;padding:4px 8px;font-size:12px;margin-top:8px}@media(min-width:640px){.module-grid{grid-template-columns:repeat(3,1fr)}.tool-list{grid-template-columns:repeat(2,1fr)}}