:root{font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-family:-apple-system,PingFang SC,Microsoft YaHei,Segoe UI,Roboto,sans-serif;line-height:1.5}html,body,#root{height:100%;margin:0;padding:0}#root{width:100%}*{box-sizing:border-box}:root{--bg:#f7f8fa;--sidebar-bg:#1f2330;--sidebar-fg:#e6e8ee;--accent:#2f6df6;--border:#e4e6eb;--user-bubble:#2f6df6;--ai-bubble:#fff}html,body,#root{height:100%;margin:0}body{color:#1a1d23;font-family:-apple-system,PingFang SC,Microsoft YaHei,Segoe UI,sans-serif}.app{background:var(--bg);height:100vh;display:flex}.sidebar{background:var(--sidebar-bg);width:260px;color:var(--sidebar-fg);flex-direction:column;flex-shrink:0;padding:16px 12px;display:flex}.sidebar-head{padding:8px 6px 16px}.brand{font-size:20px;font-weight:700}.brand-sub{opacity:.6;margin-top:4px;font-size:12px}.new-chat-btn{background:var(--accent);color:#fff;cursor:pointer;border:none;border-radius:8px;margin-bottom:12px;padding:10px;font-size:14px}.new-chat-btn:hover{filter:brightness(1.08)}.session-list{flex:1;overflow-y:auto}.session-empty{opacity:.5;padding:12px 6px;font-size:13px}.session-item{cursor:pointer;border-radius:8px;justify-content:space-between;align-items:center;margin-bottom:2px;padding:9px 10px;font-size:14px;display:flex}.session-item:hover{background:#ffffff14}.session-item.active{background:#2f6df659}.session-title{text-overflow:ellipsis;white-space:nowrap;flex:1;overflow:hidden}.session-del{color:var(--sidebar-fg);opacity:.4;cursor:pointer;background:0 0;border:none;padding:0 4px;font-size:16px}.session-del:hover{opacity:1}.chat-main{flex-direction:column;flex:1;min-width:0;display:flex}.chat-scroll{border:1px solid var(--border);background:#fff;border-radius:12px;flex:1;margin:8px 12px 0;padding:24px 0;overflow-y:auto}.welcome{max-width:720px;margin:12px auto 0;padding:0 24px}.welcome h1{margin-bottom:4px;font-size:22px}.welcome p{color:#6b7280;margin-bottom:12px;font-size:14px}.msg-area{border:1px solid var(--border);background:#fff;border-radius:12px;flex:1;min-height:40vh;margin:8px 12px 0;overflow-y:auto}.industry-grid{grid-template-columns:repeat(auto-fill,minmax(96px,1fr));gap:10px;display:grid}.industry-card{border:1px solid var(--border);cursor:pointer;background:#fff;border-radius:10px;padding:14px 8px;font-size:14px;transition:all .15s}.industry-card:hover{border-color:var(--accent);color:var(--accent);box-shadow:0 2px 8px #2f6df61f}.msg-list{max-width:820px;margin:0 auto;padding:0 24px}.msg-row{align-items:flex-start;gap:12px;margin-bottom:22px;display:flex}.msg-user{flex-direction:row-reverse}.msg-avatar{color:#fff;border-radius:8px;flex-shrink:0;justify-content:center;align-items:center;width:32px;height:32px;font-size:13px;display:flex}.msg-assistant .msg-avatar{background:#19c37d}.msg-user .msg-avatar{background:var(--accent)}.msg-bubble{word-break:break-word;border-radius:12px;max-width:80%;padding:11px 15px;font-size:14px;line-height:1.65}.msg-user .msg-bubble{background:var(--user-bubble);color:#fff}.msg-assistant .msg-bubble{background:var(--ai-bubble);border:1px solid var(--border)}.msg-text{white-space:pre-wrap}.msg-md>:first-child{margin-top:0}.msg-md>:last-child{margin-bottom:0}.msg-md pre{color:#e6edf3;background:#0d1117;border-radius:8px;padding:12px;font-size:13px;overflow-x:auto}.msg-md code{font-family:SF Mono,Menlo,monospace}.msg-md :not(pre)>code{background:#f0f1f4;border-radius:4px;padding:1px 5px;font-size:.9em}.msg-md table{border-collapse:collapse;width:100%;margin:8px 0}.msg-md th,.msg-md td{border:1px solid var(--border);text-align:left;padding:6px 10px}.msg-md th{background:#f7f8fa}.cursor-blink{color:var(--accent);animation:1s step-start infinite blink}@keyframes blink{50%{opacity:0}}.chat-error{color:#b42318;background:#fef3f2;border:1px solid #fecaca;border-radius:8px;width:100%;max-width:820px;margin:0 auto;padding:10px 16px;font-size:14px}.composer{flex-wrap:wrap;align-items:flex-end;gap:10px;width:100%;max-width:820px;margin:0 auto;padding:16px 24px 24px;display:flex}.composer-input{resize:none;border:1px solid var(--border);border-radius:12px;outline:none;flex:1;max-height:160px;margin-right:10px;padding:12px 14px;font-family:inherit;font-size:14px;line-height:1.5}.composer-input:focus{border-color:var(--accent)}.composer-send{background:var(--accent);color:#fff;cursor:pointer;border:none;border-radius:12px;flex-shrink:0;padding:12px 22px;font-size:15px}.composer-send:disabled{opacity:.45;cursor:not-allowed}.composer-send:not(:disabled):hover{filter:brightness(1.08)}.composer-mic{border:1px solid var(--border);cursor:pointer;background:#fff;border-radius:12px;flex-shrink:0;justify-content:center;align-items:center;width:46px;height:46px;font-size:20px;line-height:1;transition:background .15s,border-color .15s;display:flex}.composer-mic:not(:disabled):hover{border-color:var(--accent)}.composer-mic:disabled{opacity:.45;cursor:not-allowed}.composer-mic.recording{background:#fef3f2;border-color:#f04438;animation:1.1s ease-in-out infinite mic-pulse}@keyframes mic-pulse{0%{box-shadow:0 0 #f0443873}70%{box-shadow:0 0 0 8px #f0443800}to{box-shadow:0 0 #f0443800}}.composer-voice-error{color:#b42318;flex-basis:100%;max-width:820px;margin:4px auto 0;font-size:13px}.composer-voice-hint{color:#d92d20;flex-basis:100%;max-width:820px;margin:4px auto 0;font-size:13px}@media (width<=768px){.sidebar{display:none}.msg-list{padding:0 12px}.welcome{margin-top:4vh;padding:0 16px}.welcome h1{font-size:22px}.composer{padding:12px 12px 16px}.composer-input{font-size:15px}.composer-input::placeholder{font-size:13px}.industry-grid{grid-template-columns:repeat(5,1fr);gap:4px}.industry-card{padding:10px 4px;font-size:11px}}