:root{color-scheme:light;font-family:system-ui,-apple-system,"Segoe UI","Microsoft YaHei",sans-serif;color:#193044;background:#f4f7f9}
*{box-sizing:border-box}body{margin:0}header{display:flex;justify-content:space-between;align-items:center;padding:22px max(24px,calc((100vw - 1100px)/2));background:#fff;border-bottom:1px solid #dde5ea;gap:20px}a{color:#176b83;text-decoration:none}.brand{font-size:18px;font-weight:700}nav{display:flex;gap:24px}main{max-width:1100px;margin:0 auto;padding:34px 24px}.chat-layout{max-width:960px}.intro{margin-bottom:28px}.eyebrow{font-size:13px;letter-spacing:2px;color:#176b83}h1{font-size:30px;line-height:1.4;margin:10px 0}p{line-height:1.7;color:#567080}.panel,#chat-form{background:white;border:1px solid #dde5ea;border-radius:14px;padding:24px;margin-bottom:24px}.fields{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:16px;margin-bottom:20px}label{display:flex;flex-direction:column;gap:8px;font-size:14px;font-weight:600}input,select,textarea{font:inherit;width:100%;border:1px solid #c4d3dd;border-radius:7px;padding:11px;color:#193044;background:#fff}input[type=file]{margin-top:12px}textarea{resize:vertical;min-height:100px}input:focus,textarea:focus,select:focus{outline:2px solid #7bc5d8;outline-offset:2px}button{font:inherit;font-size:14px;border:0;border-radius:7px;background:#176b83;color:#fff;padding:10px 16px;cursor:pointer}.secondary{background:#e9f1f5;color:#193044}button:disabled{opacity:.5;cursor:default}.actions,.section-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:16px}.actions p{margin:0;flex:1}.conversation{display:grid;gap:14px;max-height:50vh;overflow:auto;margin-bottom:24px}.turn{padding:16px;border-radius:10px;background:#f2f7fa;white-space:pre-wrap;line-height:1.8;overflow-wrap:anywhere}.turn.user{background:#e6f3f5;border-left:3px solid #176b83}.turn-label{font-size:12px;color:#567080;margin-bottom:8px}.references{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}.reference-btn{background:#e0edf2;color:#176b83;text-align:left}.hint{font-size:13px}h2{font-size:20px}.table-wrap{overflow:auto}table{border-collapse:collapse;width:100%;min-width:650px;text-align:left}th,td{padding:14px 10px;border-bottom:1px solid #dde5ea;font-size:14px;vertical-align:top}td button{margin:0 6px 6px 0}dialog{border:1px solid #c4d3dd;border-radius:12px;max-width:800px;width:90vw;max-height:85vh;padding:24px}dialog::backdrop{background:#19304466}pre{white-space:pre-wrap;overflow-wrap:anywhere;font:inherit;line-height:1.8}#status{min-height:24px}#status.error{color:#a12828}[hidden]{display:none!important}@media(max-width:600px){header{align-items:flex-start;flex-direction:column;padding:18px 20px}main{padding:22px 16px}h1{font-size:24px}.panel,#chat-form{padding:18px}.actions{flex-wrap:wrap}.actions p{flex-basis:100%}}