*{box-sizing:border-box}body{margin:0;font-family:Arial,Helvetica,sans-serif;background:#f6f8fa;color:#24292f}a{color:#0969da;text-decoration:none}.auth-page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px}.auth-card{width:100%;max-width:420px;background:#fff;border:1px solid #d8dee4;border-radius:12px;padding:32px 28px;box-shadow:0 8px 24px #8c959f33}.auth-logo{width:64px;height:64px;margin:0 auto 16px;border-radius:50%;background:#24292f;color:#fff;display:flex;align-items:center;justify-content:center;font-size:28px}.auth-title{margin:0;text-align:center;font-size:32px;font-weight:700}.auth-subtitle{margin:12px 0 24px;text-align:center;color:#57606a;font-size:14px}.auth-form{display:flex;flex-direction:column;gap:16px}.auth-form-item{display:flex;flex-direction:column;gap:8px}.auth-form-item label{font-size:14px;font-weight:600}.auth-form-item input{height:44px;padding:0 14px;border:1px solid #d0d7de;border-radius:8px;font-size:14px;outline:none;transition:all .2s}.auth-form-item input:focus{border-color:#0969da;box-shadow:0 0 0 3px #0969da26}.auth-btn{margin-top:8px;height:46px;border:none;border-radius:8px;background:#1f883d;color:#fff;font-size:16px;font-weight:700;cursor:pointer;transition:background .2s}.auth-btn:hover{background:#1a7f37}.auth-btn:disabled{background:#94d3a2;cursor:not-allowed}.auth-error{padding:10px 12px;border-radius:8px;background:#ffebe9;color:#cf222e;font-size:14px}.auth-footer{margin-top:20px;text-align:center;font-size:14px;color:#57606a;display:flex;justify-content:center;gap:6px}.chat-home-page{height:100vh;display:flex;background:#f5f6f7;color:#1f2329;overflow:hidden}.sidebar{width:72px;background:#2e2f33;color:#fff;display:flex;flex-direction:column;align-items:center;padding:16px 0}.sidebar-user{margin-bottom:24px}.sidebar-avatar{width:42px;height:42px;border-radius:50%;background:#4e5969;display:flex;align-items:center;justify-content:center;font-weight:700}.sidebar-menus{display:flex;flex-direction:column;gap:12px;width:100%;align-items:center}.sidebar-bottom{margin-top:auto}.menu-btn{width:56px;height:36px;border:none;border-radius:8px;background:transparent;color:#d9d9d9;cursor:pointer}.menu-btn.active,.menu-btn:hover{background:#4e5969;color:#fff}.logout-btn{color:#ffccc7}.list-panel{width:280px;background:#fff;border-right:1px solid #e5e6eb;display:flex;flex-direction:column}.list-panel-header{height:60px;display:flex;align-items:center;justify-content:space-between;padding:0 18px;font-size:18px;font-weight:700;border-bottom:1px solid #e5e6eb}.list-panel-content{flex:1;overflow-y:auto}.list-item{padding:14px 16px;border-bottom:1px solid #f2f3f5;cursor:pointer}.list-item:hover{background:#f7f8fa}.list-item.active{background:#e8f3ff}.list-item-title{font-size:15px;font-weight:600;margin-bottom:6px}.list-item-desc{font-size:13px;color:#86909c;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.chat-window{flex:1;display:flex;flex-direction:column;background:#f7f8fa}.chat-header{height:60px;background:#fff;border-bottom:1px solid #e5e6eb;display:flex;align-items:center;padding:0 20px;font-size:18px;font-weight:700}.chat-message-list{flex:1;overflow-y:auto;padding:20px}.empty-message{color:#86909c;text-align:center;margin-top:40px}.chat-input-area{position:relative;padding:12px 20px 20px;border-top:1px solid #e5e6eb;background:#fff}.chat-toolbar{position:relative;display:flex;align-items:center;height:32px;margin-bottom:10px}.chat-tool-btn{height:34px;padding:0 14px;border:1px solid #dcdfe6;border-radius:8px;background:#fff;color:#1f2329;cursor:pointer;font-size:14px}.chat-tool-btn:hover{background:#f7f8fa}.emoji-picker-panel{position:absolute;left:0;bottom:38px;width:320px;padding:12px;border:1px solid #e5e6eb;border-radius:12px;background:#fff;box-shadow:0 8px 24px #0000001f;display:grid;grid-template-columns:repeat(8,1fr);gap:8px;z-index:120}.emoji-btn{width:32px;height:32px;border:none;border-radius:8px;background:transparent;cursor:pointer;font-size:20px;line-height:1}.emoji-btn:hover{background:#f2f3f5}.chat-tool-icon-btn{width:40px;height:40px;display:inline-flex;align-items:center;justify-content:center;padding:0;border:none;border-radius:8px;background:#fff!important;color:#111!important;cursor:pointer;line-height:1;box-shadow:none;transition:background-color .2s ease,color .2s ease;flex-shrink:0;user-select:none;-webkit-user-select:none;touch-action:none}.chat-tool-icon-btn:hover{background:#f3f4f6!important;color:#000!important}.chat-tool-icon-btn:focus{outline:none;box-shadow:none}.chat-tool-icon-btn:active,.chat-tool-icon-btn.active{background:#f3f4f6!important;color:#000!important;outline:none;box-shadow:none}.chat-input-main{display:flex;align-items:flex-end;gap:12px}.chat-input-main textarea{flex:1;min-height:92px;resize:none;border:1px solid #dcdfe6;border-radius:12px;padding:14px 16px;font-size:16px;line-height:1.6;outline:none;background:#fff}.chat-input-main textarea:focus{border-color:#07c160}.chat-input-area textarea{flex:1;resize:none;border:1px solid #d9d9d9;border-radius:8px;padding:12px;font-size:14px;outline:none}.chat-send-btn{width:96px;height:48px;border:none;border-radius:10px;background:#07c160;color:#fff;font-size:18px;font-weight:700;cursor:pointer;flex-shrink:0}.chat-send-btn:hover{background:#06ad56}.chat-input-area button{align-self:flex-end;width:88px;height:36px;border:none;border-radius:8px;background:#07c160;color:#fff;cursor:pointer;font-weight:600}.panel-action-btn{height:32px;padding:0 12px;border:none;border-radius:6px;background:#07c160;color:#fff;cursor:pointer;font-size:13px;font-weight:600}.panel-action-btn:hover{background:#06ad56}.modal-mask{position:fixed;inset:0;background:#00000059;display:flex;align-items:center;justify-content:center;z-index:999}.modal-mask-top{z-index:3000}.modal-card{width:520px;max-width:calc(100vw - 40px);background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 12px 30px #0000002e}.modal-header{height:56px;padding:0 18px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #e5e6eb;font-size:18px;font-weight:700}.modal-close{border:none;background:transparent;font-size:24px;cursor:pointer;color:#86909c}.modal-body{padding:18px}.modal-search{display:flex;gap:10px;margin-bottom:16px}.modal-search input{flex:1;height:40px;border:1px solid #dcdfe6;border-radius:8px;padding:0 12px;outline:none}.modal-search button{width:84px;border:none;border-radius:8px;background:#07c160;color:#fff;cursor:pointer;font-weight:600}.modal-result-list{max-height:320px;overflow-y:auto}.modal-empty{text-align:center;color:#86909c;padding:30px 0}.modal-user-item{display:flex;align-items:center;justify-content:space-between;padding:12px 4px;border-bottom:1px solid #f2f3f5}.modal-user-info{display:flex;align-items:center;gap:12px}.modal-user-avatar{width:42px;height:42px;border-radius:50%;background:#4e5969;color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700}.modal-user-name{font-size:15px;font-weight:600;margin-bottom:4px}.modal-user-subname{font-size:13px;color:#86909c}.modal-btn{min-width:72px;height:34px;border:none;border-radius:8px;background:#07c160;color:#fff;cursor:pointer;font-weight:600}.modal-btn.disabled{background:#c9cdd4;cursor:not-allowed}.panel-action-group{display:flex;gap:8px}.panel-action-btn.secondary{background:#86909c}.panel-action-btn.secondary:hover{background:#6b7785}.friend-item{display:flex;align-items:center;justify-content:space-between;gap:12px}.friend-main{flex:1;cursor:pointer}.friend-left{display:flex;align-items:center;gap:12px}.friend-text{display:flex;flex-direction:column}.list-avatar{width:48px;height:48px;flex-shrink:0}.list-avatar-img,.list-avatar-fallback{width:48px;height:48px;border-radius:50%;object-fit:cover}.list-avatar-fallback{display:flex;align-items:center;justify-content:center;background:#4e5969;color:#fff;font-size:20px;font-weight:700}.friend-delete-btn{border:none;background:#f53f3f;color:#fff;border-radius:6px;height:30px;padding:0 10px;cursor:pointer;font-size:12px}.friend-delete-btn:hover{background:#cf1322}.modal-btn.reject{background:#f53f3f}.modal-btn.reject:hover{background:#cf1322}.message-row{display:flex;align-items:flex-start;gap:10px;margin-bottom:18px;width:100%}.message-row.other{justify-content:flex-start}.message-row.self{justify-content:flex-end}.message-avatar{width:40px;height:40px;flex-shrink:0}.message-avatar-img,.message-avatar-fallback{width:40px;height:40px;border-radius:50%;object-fit:cover}.message-avatar-fallback{display:flex;align-items:center;justify-content:center;color:#fff;font-size:16px;font-weight:700}.message-avatar-fallback.other{background:#4e5969}.message-avatar-fallback.self{background:#07c160}.message-content-wrap{display:flex;flex-direction:column;max-width:65%}.message-content-wrap.other{align-items:flex-start}.message-content-wrap.self{align-items:flex-end}.message-meta{font-size:12px;color:#86909c;margin-bottom:6px;padding:0 4px}.message-meta.other{text-align:left}.message-meta.self{text-align:right;width:100%}.message-bubble{display:inline-block;max-width:100%;padding:10px 14px;border-radius:12px;font-size:14px;line-height:1.5;word-break:break-word}.message-bubble.other{background:#fff;border:1px solid #e5e6eb;color:#1f2329;align-self:flex-start}.message-bubble.self{background:#95ec69;border:1px solid #95ec69;color:#1f2329;align-self:flex-end}#弹窗样式 .modal-card.small{width:420px}.modal-text{font-size:15px;color:#1f2329;line-height:1.7;padding:8px 0 4px}.modal-footer{margin-top:20px;display:flex;justify-content:flex-end;gap:10px}.modal-btn.secondary{background:#86909c}.modal-btn.secondary:hover{background:#6b7785}.modal-btn.danger{background:#f53f3f}.modal-btn.danger:hover{background:#cf1322}.chat-header{height:60px;background:#fff;border-bottom:1px solid #e5e6eb;display:flex;align-items:center;justify-content:space-between;padding:0 20px}.chat-header-left{display:flex;align-items:center}.chat-header-right{display:flex;align-items:center;gap:14px}.chat-header-title{font-size:18px;font-weight:700}.chat-header-avatar{width:40px;height:40px;flex-shrink:0}.chat-header-avatar-img,.chat-header-avatar-fallback{width:40px;height:40px;border-radius:50%;object-fit:cover}.chat-header-avatar-fallback{display:flex;align-items:center;justify-content:center;background:#4e5969;color:#fff;font-size:18px;font-weight:700}.chat-header-actions{display:flex;gap:10px}.chat-header-btn{height:34px;padding:0 14px;border:none;border-radius:8px;cursor:pointer;font-size:13px;font-weight:600;color:#fff;background:#07c160}.chat-header-btn.secondary{background:#86909c}.chat-header-btn.secondary:hover{background:#6b7785}.chat-header-btn.danger{background:#f53f3f}.chat-header-btn.danger:hover{background:#cf1322}.file-message-link{color:#1677ff;text-decoration:none;font-size:13px}.file-message-link:hover{text-decoration:underline}.file-message-box{display:flex;flex-direction:column;gap:10px;min-width:180px}.file-message-name{font-size:14px;line-height:1.5;word-break:break-all}.file-message-actions{display:flex;align-items:center;gap:16px;flex-wrap:wrap}.file-message-action-link,.file-message-action-btn{border:none;background:transparent;padding:0;margin:0;color:#1677ff;text-decoration:none;font-size:13px;line-height:1;cursor:pointer;display:inline-flex;align-items:center;justify-content:center}.file-message-action-link:hover,.file-message-action-btn:hover{text-decoration:underline}.file-message-btn{border:none;background:transparent;padding:0;cursor:pointer}.recording-indicator{margin-bottom:10px;font-size:14px;color:#f53f3f}.record-active{background:#f3f4f6!important;color:#000!important}.audio-message{display:inline-flex;align-items:center;gap:8px;border:none;background:transparent;padding:0;cursor:pointer;color:inherit;font-size:14px}.audio-message.playing .audio-message-text{color:#1677ff}.audio-message-icon{font-size:16px}.audio-message-text{font-size:14px}.audio-message-duration{font-size:13px;color:#666}.voice-call-modal{width:420px}.voice-call-body{padding:24px 28px 22px}.voice-call-modal .modal-footer{justify-content:center}.voice-call-user{display:flex;flex-direction:column;align-items:center;margin-bottom:18px}.voice-call-avatar{width:72px;height:72px;margin-bottom:10px}.voice-call-avatar.large{width:80px;height:80px}.voice-call-avatar.small{width:32px;height:32px;margin-bottom:0;flex-shrink:0}.voice-call-avatar-img,.voice-call-avatar-fallback{width:100%;height:100%;border-radius:50%;object-fit:cover}.voice-call-avatar-fallback{display:flex;align-items:center;justify-content:center;background:#4e5969;color:#fff;font-size:28px;font-weight:700}.voice-call-user-name{font-size:18px;font-weight:700;color:#1f2329}.voice-call-message{text-align:center;font-size:15px;color:#4e5969;line-height:1.7;margin-bottom:14px}.voice-call-duration{text-align:center;font-size:16px;font-weight:600;color:#1f2329}.voice-call-mute-row{display:flex;justify-content:center;margin-top:14px;margin-bottom:6px}.group-call-participant-block{margin-bottom:16px}.group-call-participant-title{font-size:15px;font-weight:700;color:#1f2329;margin-bottom:10px}.group-call-participant-list{display:flex;flex-wrap:wrap;gap:10px}.group-call-participant-item{display:flex;align-items:center;gap:8px;padding:8px 10px;border-radius:10px;background:#f7f8fa}.group-call-participant-avatar{width:32px;height:32px}.group-call-participant-avatar-img,.group-call-participant-avatar-fallback{width:32px;height:32px;border-radius:50%;object-fit:cover}.group-call-participant-avatar-fallback{display:flex;align-items:center;justify-content:center;background:#4e5969;color:#fff;font-size:14px;font-weight:700}.group-call-participant-name{font-size:14px;color:#1f2329}.video-call-modal-card{width:900px;max-width:92vw}.video-call-message{text-align:center;font-size:16px;color:#4e5969;line-height:1.7;margin-bottom:18px}.video-call-duration{margin-top:18px;text-align:center;font-size:16px;font-weight:700;color:#1f2329}.video-call-private-stage{position:relative;width:100%;height:420px;border-radius:16px;overflow:hidden;background:#0f172a}.video-call-private-remote{width:100%;height:100%}.video-call-private-local{position:absolute;right:16px;bottom:16px;width:220px;height:140px;z-index:2}.video-call-tile{position:relative;width:100%;height:100%;min-height:180px;border-radius:14px;overflow:hidden;background:#111827;border:3px solid transparent;transition:border-color .2s ease,box-shadow .2s ease,transform .2s ease}.video-call-tile.small{min-height:140px}.video-call-tile.speaking{border-color:#00c853;box-shadow:0 0 0 3px #00c85338;transform:translateY(-1px)}.video-call-speaking-tag{position:absolute;top:10px;right:10px;padding:4px 10px;border-radius:999px;background:#00c853eb;color:#fff;font-size:12px;font-weight:700;z-index:2}.video-call-video{width:100%;height:100%;object-fit:cover;background:#111827}.video-call-label{position:absolute;left:10px;bottom:10px;padding:4px 10px;border-radius:999px;background:#0000007a;color:#fff;font-size:13px;font-weight:600}.video-call-group-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;width:100%;min-height:360px}.voice-call-remote-muted-tag{margin-top:8px;font-size:13px;font-weight:600;color:#ff4d4f}.group-call-participant-info{display:flex;flex-direction:column;gap:4px}.group-call-participant-muted{font-size:12px;color:#ff4d4f;font-weight:600}.video-call-media-row{display:flex;justify-content:center;gap:12px;margin-top:14px;margin-bottom:6px}.video-call-status-tags{position:absolute;left:10px;top:10px;display:flex;gap:6px;flex-wrap:wrap;z-index:2}.video-call-status-tag{padding:4px 8px;border-radius:999px;color:#fff;font-size:12px;font-weight:700;background:#00000080}.video-call-status-tag.muted{background:#ff4d4fe6}.video-call-status-tag.camera{background:#4e5969eb}.video-call-tile.camera-off{background:#1f2937}.video-call-camera-off-placeholder{width:100%;height:100%;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#1f2937,#111827)}.video-call-camera-off-text{font-size:16px;font-weight:700;color:#fff}.call-message-card{display:flex;align-items:center;gap:12px;min-width:220px;max-width:320px}.call-message-icon{font-size:24px;line-height:1}.call-message-content{display:flex;flex-direction:column;gap:4px}.call-message-title{font-size:14px;font-weight:700;color:#1f2329}.call-message-text{font-size:13px;color:#4e5969;line-height:1.5}.call-message-duration{font-size:12px;color:#86909c}.recalled-row{justify-content:center;margin:10px 0}.message-recalled-text{font-size:13px;color:#86909c;background:#f2f3f5;padding:4px 12px;border-radius:999px}.message-reply-bubble{background:#0000000a;border-left:3px solid #86909c;padding:6px 10px;border-radius:4px;margin-bottom:6px;font-size:13px;max-width:100%}.message-reply-user{font-weight:600;color:#4e5969;margin-bottom:2px}.message-reply-text{color:#86909c;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.message-actions-bar{display:flex;gap:8px;margin-top:4px;opacity:0;transition:opacity .2s ease}.message-row:hover .message-actions-bar{opacity:1}.message-content-wrap.other .message-actions-bar{justify-content:flex-start;padding-left:4px}.message-content-wrap.self .message-actions-bar{justify-content:flex-end;padding-right:4px}.message-action-btn{font-size:12px;color:#1677ff;background:transparent;border:none;cursor:pointer;padding:0}.message-action-btn:hover{text-decoration:underline}.message-read-status{font-size:12px;margin-top:4px;text-align:right;cursor:pointer;-webkit-user-select:none;user-select:none}.read-all{color:#00c853;font-weight:600}.read-count{color:#1677ff}.read-none{color:#86909c}.reply-prep-bar{display:flex;align-items:center;justify-content:space-between;background:#f7f8fa;padding:8px 14px;border-top:1px solid #e5e6eb;border-bottom:1px solid #e5e6eb;font-size:13px;color:#4e5969}.reply-prep-content{flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.reply-prep-close{background:transparent;border:none;color:#86909c;cursor:pointer;padding:0 4px;font-size:14px}.reply-prep-close:hover{color:#f53f3f}.list-unread-badge{background-color:#f53f3f;color:#fff;font-size:12px;font-weight:500;height:18px;line-height:18px;min-width:18px;padding:0 6px;border-radius:9px;text-align:center;margin-left:8px;display:inline-block}