:root{--accent: #2f6bff;--accent-grad: linear-gradient(135deg, #2f6bff 0%, #00c6ff 100%);--bg: #f6f8fc;--border: #e7edf8;--text-main: #1a2437;--text-sub: #64748b}*{margin:0;padding:0;box-sizing:border-box}html,body,#app{height:100%}body{font-family:-apple-system,PingFang SC,Microsoft YaHei,sans-serif;color:var(--text-main);background:var(--bg);-webkit-font-smoothing:antialiased}button{cursor:pointer;border:none;background:none;font-family:inherit}input,textarea{font-family:inherit}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-thumb{background:#c3cfe6;border-radius:3px}::-webkit-scrollbar-thumb:hover{background:#9fb2d8}.md-body{line-height:1.75;font-size:15px;word-break:break-word}.md-body p{margin:0 0 10px}.md-body p:last-child{margin-bottom:0}.md-body h1,.md-body h2,.md-body h3,.md-body h4{margin:14px 0 8px;font-size:1.1em}.md-body ul,.md-body ol{padding-left:22px;margin:6px 0 10px}.md-body li{margin:3px 0}.md-body blockquote{border-left:3px solid #6b93ff;padding:2px 12px;margin:8px 0;color:#57606a;background:#f4f7ff;border-radius:0 6px 6px 0}.md-body :not(pre)>code{background:#f0f2f5;border:1px solid #e6e9ee;border-radius:4px;padding:1px 6px;font-size:13px;font-family:Consolas,Monaco,monospace}.md-body pre{background:#1e2230;color:#e6e9f0;border-radius:10px;padding:14px 16px;overflow-x:auto;margin:10px 0;font-size:13.5px;line-height:1.6}.md-body pre code{font-family:Consolas,Monaco,monospace}.md-body table{border-collapse:collapse;margin:10px 0;width:100%}.md-body th,.md-body td{border:1px solid #e5e7eb;padding:6px 12px;font-size:14px}.md-body th{background:#f6f8fa}.md-body a{color:var(--accent);text-decoration:none}.reasoning{margin:2px 0 8px;border:1px solid var(--border);border-radius:10px;background:#f9fbff;overflow:hidden}.reasoning.waiting{border-color:#bcd0fb}.reasoning-pulse{width:8px;height:8px;border-radius:50%;background:#4a7cf0;animation:reasonPulse 1.2s ease-in-out infinite}@keyframes reasonPulse{0%,to{transform:scale(1);opacity:.5}50%{transform:scale(1.5);opacity:1}}.tool-hint{font-size:12.5px;color:#7a4d0d;background:#fdf6ec;border:1px solid #f3e0c3;border-radius:8px;padding:4px 12px;margin:2px 0 8px;display:inline-block}.reasoning-toggle{width:100%;text-align:left;padding:7px 12px;font-size:12.5px;color:#8a919f;display:flex;align-items:center;gap:5px}.reasoning-toggle .caret{margin-left:auto;transition:transform .15s}.reasoning.open .reasoning-toggle .caret{transform:rotate(180deg)}.reasoning-body{padding:4px 12px 10px;font-size:12.5px;color:#6b7280;line-height:1.7;white-space:pre-wrap;word-break:break-word;max-height:260px;overflow-y:auto;border-top:1px dashed #eceef1}