:root{--im-text: #111827;--im-text-secondary: #6b7280;--im-border: #e5e7eb;--im-bg: #f3f4f6;--im-surface: #ffffff;--im-primary: #2563eb;--im-primary-hover: #1d4ed8;--im-danger: #dc2626;--im-radius: 10px;--im-font: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif}*{margin:0;padding:0;box-sizing:border-box}html,body{height:100%;font-family:var(--im-font);color:var(--im-text);background:var(--im-bg);-webkit-font-smoothing:antialiased}#app{height:100%}a{color:var(--im-primary);text-decoration:none}a:hover{text-decoration:underline}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-thumb{background:#d1d5db;border-radius:3px}::-webkit-scrollbar-track{background:transparent}.im-toast{position:fixed;z-index:3000;left:50%;top:24px;transform:translate(-50%) translateY(-12px);padding:10px 18px;border-radius:999px;font-size:14px;box-shadow:0 10px 30px #0f172a26;opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;max-width:min(90vw,400px);text-align:center}.im-toast--visible{opacity:1;transform:translate(-50%) translateY(0)}.im-toast--info{background:#1f2937;color:#fff}.im-toast--success{background:#059669;color:#fff}.im-toast--error{background:#b91c1c;color:#fff}.im-btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:8px 14px;font-size:14px;font-weight:500;border-radius:8px;border:1px solid transparent;cursor:pointer;transition:background .15s,border-color .15s,color .15s;background:#fff;color:var(--im-text);border-color:var(--im-border)}.im-btn:disabled{opacity:.5;cursor:not-allowed}.im-btn--primary{background:var(--im-primary);color:#fff;border-color:var(--im-primary)}.im-btn--primary:hover:not(:disabled){background:var(--im-primary-hover)}.im-btn--danger{background:#fef2f2;color:var(--im-danger);border-color:#fecaca}.im-btn--danger:hover:not(:disabled){background:#fee2e2}.im-btn--ghost{background:transparent}.im-btn--sm{padding:6px 10px;font-size:13px}.im-input,.im-textarea{width:100%;font:inherit;color:var(--im-text);background:#fff;border:1px solid var(--im-border);border-radius:8px;padding:10px 12px;outline:none;transition:border-color .15s,box-shadow .15s}.im-input:focus,.im-textarea:focus{border-color:var(--im-primary);box-shadow:0 0 0 3px #2563eb33}.im-input::placeholder,.im-textarea::placeholder{color:#9ca3af}.im-textarea{resize:vertical;min-height:80px;line-height:1.5}.im-input-wrap{position:relative;display:flex;align-items:center;border:1px solid var(--im-border);border-radius:8px;background:#fff;padding-left:10px;transition:border-color .15s,box-shadow .15s}.im-input-wrap:focus-within{border-color:var(--im-primary);box-shadow:0 0 0 3px #2563eb33}.im-input-wrap .im-input{border:none;box-shadow:none;padding-left:4px}.im-input-wrap .im-input--icon{color:#9ca3af;display:flex}.im-avatar{width:40px;height:40px;min-width:40px;min-height:40px;border-radius:50%;background:linear-gradient(135deg,#3b82f6,#6366f1);color:#fff;display:flex;align-items:center;justify-content:center;font-size:16px;font-weight:600;overflow:hidden}.im-avatar img{width:100%;height:100%;object-fit:cover}.im-avatar--sm{width:32px;height:32px;min-width:32px;min-height:32px;font-size:13px}.status-dot{width:8px;height:8px;border-radius:50%;display:inline-block;flex-shrink:0}.status-dot.online{background:#22c55e}.status-dot.busy{background:#f59e0b}.status-dot.offline{background:#9ca3af}.status-dot.away{background:#8b5cf6}.im-skeleton{color:#9ca3af;font-size:13px;padding:8px 0}.im-badge{min-width:18px;height:18px;padding:0 5px;font-size:11px;line-height:18px;text-align:center;color:#fff;background:#ef4444;border-radius:9px}.message-bubble{max-width:70%;padding:10px 14px;border-radius:10px;word-break:break-word}.message-bubble.visitor{background:#e5e7eb;color:var(--im-text)}.message-bubble.agent{background:var(--im-primary);color:#fff}.message-bubble.system{background:transparent;color:#6b7280;text-align:center;max-width:100%;font-size:12px}.im-tabs{display:flex;border-bottom:1px solid var(--im-border)}.im-tabs button{flex:1;padding:12px;font:inherit;background:none;border:none;color:#6b7280;cursor:pointer;position:relative}.im-tabs button.is-active{color:var(--im-primary);font-weight:600}.im-tabs button.is-active:after{content:"";position:absolute;left:12px;right:12px;bottom:0;height:2px;background:var(--im-primary);border-radius:2px 2px 0 0}.im-empty{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;color:#9ca3af;padding:32px 16px;text-align:center}.im-empty p{font-size:14px}.im-title-sm{font-size:12px;font-weight:600;color:#6b7280;margin-bottom:6px}.im-form-row{margin-bottom:14px}.im-spin{display:inline-flex;align-items:center;gap:8px;animation:im-spin-rotate .8s linear infinite}@keyframes im-spin-rotate{to{transform:rotate(360deg)}}.im-dropdown{position:relative}.im-dropdown__menu{position:absolute;z-index:100;top:100%;right:0;margin-top:6px;min-width:180px;background:#fff;border:1px solid var(--im-border);border-radius:10px;box-shadow:0 12px 32px #0f172a1f;padding:6px}.im-dropdown__item{display:flex;align-items:center;gap:8px;width:100%;border:none;background:none;text-align:left;font:inherit;padding:8px 10px;border-radius:6px;cursor:pointer;color:var(--im-text)}.im-dropdown__item:hover{background:#f3f4f6}.im-dropdown__item--divided{border-top:1px solid var(--im-border);margin-top:6px;padding-top:8px}.im-tag{display:inline-block;padding:2px 8px;font-size:12px;border-radius:6px;background:#e5e7eb;color:#4b5563}.im-icon{display:inline-flex;align-items:center;justify-content:center;color:inherit;vertical-align:middle}.im-icon svg{width:1.1em;height:1.1em}.im-icon--sm svg{width:.85em;height:.85em}.im-icon--xl{font-size:64px;color:#d1d5db}