:root{--bg:#f5f6f8;--panel:#fff;--line:#e5e7eb;--text:#1f2329;--muted:#8a9099;--brand:#2f6bff;--brand-soft:#eaf0ff;--bubble-me:#2f6bff;--bubble-other:#fff;--ok:#12b76a;--danger:#e24b4a}*{box-sizing:border-box}html,body,#app{height:100%;margin:0}body{background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;font-family:-apple-system,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;font-size:14px}button{cursor:pointer;border:none;border-radius:8px;font-family:inherit}button:disabled{cursor:not-allowed}input,textarea{font-family:inherit;font-size:14px}.boot{height:100%;color:var(--muted);justify-content:center;align-items:center;font-size:13px;display:flex}.login-wrap{justify-content:center;align-items:center;height:100%;display:flex}.card{background:var(--panel);border:1px solid var(--line);border-radius:14px;width:350px;padding:28px}.card h1{margin:0 0 4px;font-size:18px;font-weight:600}.card p.hint{color:var(--muted);margin:0 0 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