*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--primary: #2563eb;--primary-light: #3b82f6;--primary-bg: #eff6ff;--bg: #f8fafc;--surface: #ffffff;--border: #e2e8f0;--text: #1e293b;--text-secondary: #64748b;--success: #22c55e;--warning: #f59e0b;--error: #ef4444;--shadow: 0 1px 3px rgba(0, 0, 0, .08);--radius: 12px}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;background:var(--bg);color:var(--text);height:100vh;overflow:hidden}#root{height:100vh}.app{display:flex;flex-direction:column;height:100vh}.app-header{display:flex;align-items:center;justify-content:space-between;padding:12px 24px;background:var(--surface);border-bottom:1px solid var(--border);box-shadow:var(--shadow);z-index:10}.header-left{display:flex;align-items:baseline;gap:12px}.header-left h1{font-size:20px;font-weight:700;color:var(--text)}.subtitle{color:var(--text-secondary);font-size:13px}.header-nav{display:flex;gap:8px}.nav-btn{padding:8px 16px;border:1px solid var(--border);border-radius:8px;background:var(--surface);color:var(--text-secondary);cursor:pointer;font-size:14px;transition:all .2s}.nav-btn:hover{background:var(--primary-bg);border-color:var(--primary-light)}.nav-btn.active{background:var(--primary);color:#fff;border-color:var(--primary)}.app-main{flex:1;overflow:hidden}.chat-layout{display:flex;height:100%;gap:0}.chat-container{flex:1;display:flex;flex-direction:column;max-width:720px;margin:0 auto;height:100%;border-right:1px solid var(--border)}.chat-header{display:flex;align-items:center;gap:12px;padding:12px 20px;border-bottom:1px solid var(--border);background:var(--surface)}.chat-status{font-size:12px;padding:3px 10px;border-radius:12px;background:var(--border);color:var(--text-secondary)}.chat-status[data-status=ready]{background:#dcfce7;color:#166534}.chat-status[data-status=submitted],.chat-status[data-status=streaming]{background:#dbeafe;color:#1e40af}.chat-error{color:var(--error);font-size:13px}.clear-btn{margin-left:auto;padding:6px 12px;border:none;border-radius:6px;background:transparent;color:var(--text-secondary);cursor:pointer;font-size:13px}.clear-btn:hover{background:#fef2f2;color:var(--error)}.chat-messages{flex:1;overflow-y:auto;padding:20px;display:flex;flex-direction:column;gap:16px}.chat-welcome{text-align:center;padding:48px 24px;color:var(--text-secondary)}.welcome-icon{font-size:48px;margin-bottom:16px}.chat-welcome h2{font-size:22px;color:var(--text);margin-bottom:8px}.chat-welcome p{margin-bottom:24px}.welcome-tips{display:flex;flex-direction:column;gap:10px;max-width:360px;margin:0 auto 24px}.tip{padding:10px 16px;background:var(--primary-bg);border-radius:8px;font-size:14px;color:var(--text);border:1px solid #dbeafe}.welcome-start{font-size:14px;color:var(--primary);font-weight:500}.message{display:flex;gap:12px;max-width:90%}.message-user{align-self:flex-end;flex-direction:row-reverse}.message-assistant{align-self:flex-start}.message-avatar{font-size:28px;flex-shrink:0;width:36px;height:36px;display:flex;align-items:center;justify-content:center;border-radius:50%;background:var(--primary-bg)}.message-user .message-avatar{background:#dbeafe}.message-content{padding:12px 16px;border-radius:var(--radius);font-size:14px;line-height:1.6;white-space:pre-wrap;word-break:break-word}.message-assistant .message-content{background:var(--surface);border:1px solid var(--border);border-top-left-radius:4px}.message-user .message-content{background:var(--primary);color:#fff;border-top-right-radius:4px}.message-user .user-text{color:#fff}.assistant-text{color:var(--text)}.tool-call{font-size:13px;color:var(--text-secondary);padding:4px 0;font-style:italic}.tool-result{font-size:13px;color:var(--success);padding:4px 0}.typing-indicator{display:flex;gap:4px;padding:4px 0}.typing-indicator span{width:8px;height:8px;border-radius:50%;background:var(--text-secondary);animation:typing 1.4s infinite}.typing-indicator span:nth-child(2){animation-delay:.2s}.typing-indicator span:nth-child(3){animation-delay:.4s}@keyframes typing{0%,60%,to{opacity:.3;transform:scale(.8)}30%{opacity:1;transform:scale(1.1)}}.chat-input-form{display:flex;gap:8px;padding:16px 20px;border-top:1px solid var(--border);background:var(--surface)}.chat-input{flex:1;padding:10px 16px;border:1px solid var(--border);border-radius:8px;font-size:14px;outline:none;transition:border-color .2s}.chat-input:focus{border-color:var(--primary);box-shadow:0 0 0 3px #2563eb1a}.send-btn{padding:10px 20px;border:none;border-radius:8px;background:var(--primary);color:#fff;font-size:14px;font-weight:500;cursor:pointer;transition:background .2s}.send-btn:hover:not(:disabled){background:var(--primary-light)}.send-btn:disabled{opacity:.5;cursor:not-allowed}.report-panel{width:420px;overflow-y:auto;padding:20px;background:var(--surface)}.charts-container{display:flex;flex-direction:column;gap:16px}.charts-title{font-size:16px;color:var(--text);margin-bottom:4px}.charts-empty{color:var(--text-secondary);text-align:center;padding:40px}.report-summary{margin-bottom:8px}.summary-cards{display:grid;grid-template-columns:1fr 1fr;gap:8px}.summary-item{display:flex;flex-direction:column;padding:12px;background:var(--primary-bg);border-radius:8px;border:1px solid #dbeafe}.summary-label{font-size:12px;color:var(--text-secondary);margin-bottom:4px}.summary-value{font-size:18px;font-weight:700;color:var(--primary)}.charts-grid{display:flex;flex-direction:column;gap:16px}.chart-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:12px;overflow:hidden}.chart-full{grid-column:1 / -1}.import-layout{max-width:640px;margin:0 auto;padding:32px 24px;height:100%;overflow-y:auto}.excel-import h2{margin-bottom:8px}.import-desc{color:var(--text-secondary);font-size:14px;margin-bottom:24px}.import-dropzone{border:2px dashed var(--border);border-radius:var(--radius);padding:40px;text-align:center;cursor:pointer;transition:all .2s;background:var(--surface)}.import-dropzone:hover{border-color:var(--primary);background:var(--primary-bg)}.file-prompt .upload-icon{font-size:36px;display:block;margin-bottom:12px}.file-prompt p{color:var(--text-secondary);font-size:14px}.file-prompt .hint{font-size:12px;margin-top:4px}.file-selected{display:flex;align-items:center;justify-content:center;gap:8px;font-size:15px;font-weight:500}.file-icon{font-size:24px}.import-error{margin-top:12px;padding:10px 16px;background:#fef2f2;border:1px solid #fecaca;border-radius:8px;color:var(--error);font-size:14px}.import-preview{margin-top:24px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px}.import-preview h3{margin-bottom:12px}.preview-date{margin-bottom:12px;font-size:14px}.preview-table{width:100%;border-collapse:collapse;font-size:14px;margin-bottom:16px}.preview-table th,.preview-table td{padding:8px 12px;text-align:left;border-bottom:1px solid var(--border)}.preview-table th{background:var(--primary-bg);font-weight:600;font-size:13px;color:var(--text-secondary)}.preview-table tfoot td{background:#f8fafc;font-weight:600}.import-btn{width:100%;padding:12px;border:none;border-radius:8px;background:var(--success);color:#fff;font-size:15px;font-weight:600;cursor:pointer;transition:background .2s}.import-btn:hover:not(:disabled){background:#16a34a}.import-btn:disabled{opacity:.6;cursor:not-allowed}