:root{--bg-page: #f3f5f7;--bg-panel: #ffffff;--bg-muted: #f7f8fb;--line-color: #dde2ea;--text-main: #1f2937;--text-sub: #667085;--brand: #0f7ed6;--brand-strong: #0665b0;--danger: #d92d20;--radius-md: 12px;--radius-sm: 8px}*{box-sizing:border-box}html,body,#app{width:100%;height:100%;margin:0;padding:0}body{font-family:PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;color:var(--text-main);background:var(--bg-page)}button,input,textarea{font:inherit}.login-page{min-height:100%;display:flex;align-items:center;justify-content:center;padding:24px}.login-card{width:100%;max-width:420px;padding:28px;border-radius:var(--radius-md);background:var(--bg-panel);border:1px solid var(--line-color);box-shadow:0 10px 40px #0b213514}.login-card__title{margin:0;font-size:24px}.login-card__subtitle{margin:8px 0 24px;color:var(--text-sub)}.login-card__label{display:block;margin-bottom:14px;font-size:14px;color:var(--text-sub)}.login-card__input{width:100%;margin-top:6px;border:1px solid var(--line-color);border-radius:var(--radius-sm);padding:10px 12px;background:#fff}.login-card__error{margin:0 0 12px;color:var(--danger);font-size:13px}.login-card__submit{width:100%;border:0;border-radius:var(--radius-sm);background:var(--brand);color:#fff;padding:11px 14px;cursor:pointer}.login-card__submit:disabled{opacity:.6;cursor:not-allowed}.dashboard-page{width:100%;height:100%;display:flex;flex-direction:column}.topbar{height:60px;border-bottom:1px solid var(--line-color);background:var(--bg-panel);display:flex;align-items:center;justify-content:space-between;padding:0 16px}.topbar__title{font-size:18px;font-weight:600}.topbar__right{display:flex;align-items:center;gap:12px}.topbar__profile{color:var(--text-sub);font-size:14px}.topbar__btn{border:1px solid var(--line-color);border-radius:var(--radius-sm);background:#fff;color:var(--text-main);padding:7px 11px;cursor:pointer}.dashboard-body{flex:1;min-height:0;display:flex}.conversation-panel{width:320px;min-width:280px;max-width:360px;border-right:1px solid var(--line-color);background:var(--bg-panel);display:flex;flex-direction:column;min-height:0}.conversation-panel__toolbar{padding:12px;display:flex;align-items:center;justify-content:space-between;gap:10px}.conversation-panel__tabs{display:inline-flex;border:1px solid var(--line-color);border-radius:var(--radius-sm);overflow:hidden}.conversation-panel__tab{border:0;background:#fff;padding:7px 12px;cursor:pointer;color:var(--text-sub)}.conversation-panel__tab.active{background:var(--brand);color:#fff}.conversation-panel__refresh{border:1px solid var(--line-color);background:#fff;border-radius:var(--radius-sm);padding:7px 10px;cursor:pointer}.conversation-panel__search{margin:0 12px 12px;border:1px solid var(--line-color);border-radius:var(--radius-sm);padding:9px 10px}.conversation-panel__list{flex:1;min-height:0;overflow-y:auto;padding:0 10px 12px}.conversation-item{width:100%;text-align:left;border:1px solid var(--line-color);background:#fff;border-radius:var(--radius-sm);padding:10px;margin-bottom:8px;cursor:pointer}.conversation-item.active{border-color:var(--brand);background:#0f7ed60f}.conversation-item__header{display:flex;justify-content:space-between;gap:10px}.conversation-item__name{font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.conversation-item__time{color:var(--text-sub);font-size:12px}.conversation-item__body{margin-top:8px;display:flex;align-items:center;justify-content:space-between;gap:10px}.conversation-item__summary{margin:0;color:var(--text-sub);font-size:13px;line-height:1.4;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.conversation-item__badge{min-width:18px;height:18px;border-radius:999px;background:#ef4444;color:#fff;font-size:12px;line-height:18px;text-align:center;padding:0 6px}.conversation-item__meta{margin-top:8px;font-size:12px;color:var(--text-sub)}.chat-window{flex:1;min-width:0;min-height:0;display:flex;flex-direction:column;background:var(--bg-muted)}.chat-window__header{background:#fff;border-bottom:1px solid var(--line-color);padding:14px 16px;display:flex;align-items:center;justify-content:space-between;gap:12px}.chat-window__title{margin:0;font-size:18px}.chat-window__subtitle{margin:6px 0 0;color:var(--text-sub);font-size:13px}.chat-window__actions{display:flex;gap:8px}.chat-window__action{border:1px solid var(--line-color);border-radius:var(--radius-sm);background:#fff;padding:7px 10px;cursor:pointer}.chat-window__messages{flex:1;min-height:0;overflow-y:auto;padding:16px}.message-row{display:flex;margin-bottom:12px}.message-row.is-user{justify-content:flex-start}.message-row.is-staff{justify-content:flex-end}.message-row.is-system{justify-content:center}.message-bubble{max-width:min(72%,520px);border-radius:12px;padding:10px}.message-bubble.is-user{background:#fff;border:1px solid var(--line-color)}.message-bubble.is-staff{background:var(--brand);color:#fff}.message-bubble.is-system{background:#fff6dd;color:#7a5a00;border:1px solid #f4dda0}.message-bubble__text{margin:0;white-space:pre-wrap;word-break:break-word}.message-bubble__time{margin-top:6px;display:inline-block;font-size:12px;opacity:.75}.composer{border-top:1px solid var(--line-color);padding:12px;background:#fff;display:flex;gap:10px;align-items:flex-end}.composer__input{flex:1;resize:vertical;min-height:72px;border:1px solid var(--line-color);border-radius:var(--radius-sm);padding:10px}.composer__send{border:0;border-radius:var(--radius-sm);background:var(--brand);color:#fff;padding:10px 16px;cursor:pointer}.composer__send:disabled{opacity:.6;cursor:not-allowed}.state-empty,.state-loading{color:var(--text-sub);text-align:center;padding:24px}@media (max-width: 900px){.dashboard-body{flex-direction:column}.conversation-panel{width:100%;max-width:none;min-width:0;height:300px;border-right:0;border-bottom:1px solid var(--line-color)}}