*{margin:0;padding:0;box-sizing:border-box}:root{--chat-primary: #3370ff;--chat-primary-light: #d6e2ff;--chat-padding-left: 36px;--chat-text: #303133;--chat-text-secondary: #909399;--chat-border: #dcdfe6;--chat-bg: #eef1f4;--chat-panel-bg: #ffffff;--chat-surface: #ffffff}html,body,#root{height:100%}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;background:var(--chat-bg);color:var(--chat-text);overflow:hidden}.chat-pc{height:100%;min-height:100vh;overflow:hidden;background:var(--chat-bg);display:flex;flex-direction:row}.chat-pc__left{position:relative;flex-shrink:0;z-index:11;height:100%}.chat-pc--expanded .chat-pc__right{width:calc(100% - 280px)}.chat-pc--collapsed .chat-pc__right{width:calc(100% - 65px)}.chat-pc__right{flex:1;min-width:0;min-height:0;overflow:hidden;display:flex;flex-direction:column;background:var(--chat-bg)}.chat-header{padding:16px 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var(--chat-border);border-radius:8px;color:var(--chat-text);padding:12px;font-size:13px;line-height:1.7;font-family:inherit;resize:vertical;outline:none}.content-textarea:focus{border-color:var(--chat-primary)}.editor-actions{display:flex;align-items:center;gap:8px;margin-top:8px;flex-wrap:wrap}.expand-button.cancel{border-color:var(--chat-border);color:var(--chat-text-secondary)}.expand-button.cancel:hover{border-color:#909399;color:var(--chat-text)}.editor-hint{font-size:11px;color:var(--chat-text-secondary);margin-left:4px}.option-buttons{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px}.option-btn{background:#f5f7fa;border:1px solid var(--chat-border);color:var(--chat-text);padding:6px 14px;border-radius:8px;cursor:pointer;font-size:13px;transition:all 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0;flex-shrink:0}.history-panel__brand{display:flex;align-items:center;gap:8px;margin-bottom:16px}.history-panel__logo{width:32px;height:32px;display:flex;align-items:center;justify-content:center;font-size:18px;background:var(--chat-primary-light);border-radius:6px;flex-shrink:0}.history-panel__name{font-size:15px;font-weight:500;color:var(--chat-text);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.history-panel__new-chat{display:flex;align-items:center;justify-content:center;gap:4px;width:100%;padding:8px 12px;margin-bottom:8px;border:1px solid rgba(51,112,255,.4);border-radius:6px;background:#3370ff1a;color:var(--chat-primary);font-size:14px;font-weight:500;cursor:pointer;transition:all .2s}.history-panel__new-chat:hover{background:#3370ff29}.history-panel__new-chat--icon{width:36px;height:36px;padding:0;margin:0 auto 8px}.history-panel__new-icon{font-size:16px;line-height:1}.history-panel__section-title{display:flex;align-items:center;justify-content:space-between;padding:8px 8px 0;font-size:13px;color:var(--chat-text-secondary)}.history-panel__clear{border:none;background:transparent;cursor:pointer;font-size:14px;opacity:.7;padding:4px;border-radius:4px}.history-panel__clear:hover{opacity:1;background:#0000000d}.history-panel__list{flex:1;min-height:0;overflow-y:auto;padding:8px 16px 16px}.history-panel__empty{text-align:center;font-size:13px;color:var(--chat-text-secondary);padding:24px 8px}.history-list{list-style:none}.history-list__item{position:relative;display:flex;align-items:center;border-radius:6px;margin-bottom:4px}.history-list__item.active{background:var(--chat-surface);box-shadow:0 1px 3px #0000000a}.history-list__item:hover:not(.active){background:#0000000a}.history-list__button{flex:1;min-width:0;border:none;background:transparent;text-align:left;padding:10px 12px;cursor:pointer;font-size:14px;color:var(--chat-text)}.history-list__title{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.history-list__item.active .history-list__button{font-weight:500}.history-list__actions{position:relative;flex-shrink:0;padding-right:4px}.history-list__more{width:28px;height:28px;border:none;background:transparent;border-radius:4px;cursor:pointer;color:var(--chat-text-secondary);font-size:16px;line-height:1}.history-list__more:hover{background:#0000000f}.history-list__menu{position:absolute;right:0;top:100%;z-index:20;min-width:88px;background:var(--chat-surface);border:1px solid var(--chat-border);border-radius:6px;box-shadow:0 4px 12px #0000001a;overflow:hidden}.history-list__menu button{display:block;width:100%;border:none;background:transparent;text-align:left;padding:8px 12px;font-size:13px;color:var(--chat-text);cursor:pointer}.history-list__menu button:hover{background:#f5f7fa}.history-panel__collapse{position:absolute;top:20px;right:-12px;z-index:12;width:24px;height:24px;border-radius:50%;border:1px solid var(--chat-border);background:var(--chat-surface);box-shadow:0 4px 10px #00000014;cursor:pointer;font-size:14px;color:var(--chat-text-secondary);display:flex;align-items:center;justify-content:center;padding:0}.history-panel__collapse:hover{color:var(--chat-primary);border-color:var(--chat-primary)}.history-panel__list::-webkit-scrollbar{width:4px}.history-panel__list::-webkit-scrollbar-thumb{background:#dcdfe6;border-radius:2px}@media only screen and (max-width:768px){.chat-pc{flex-direction:column}.chat-pc__left{height:auto}.history-panel{width:100%;height:auto;max-height:40vh}.history-panel--collapsed,.chat-pc--expanded .chat-pc__right,.chat-pc--collapsed .chat-pc__right{width:100%}.history-panel__collapse{display:none}}