.im-app{--brand:#3478f6;--brand-hover:#2a6ae0;--brand-soft:#eaf1fe;--brand-soft2:#f0f5ff;--bg:#f5f7fa;--card:#fff;--text:#1f2937;--text-sub:#5b6779;--muted:#94a3b8;--line:#edf1f7;--line-strong:#e2e8f2;--rail-bg:#1b2434;--rail-text:#8a94a6;--success:#22c55e;--danger:#ef4444;--warn:#f59e0b;--radius-lg:12px;--radius-md:8px;--radius-sm:6px;--shadow-sm:0 1px 2px #1018280a;--shadow-md:0 4px 16px #10182814;background:var(--bg);min-width:1180px;height:100vh;color:var(--text);-webkit-font-smoothing:antialiased;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,Noto Sans SC,sans-serif;font-size:14px;display:flex;overflow:hidden}.im-app *,.im-app :before,.im-app :after{box-sizing:border-box}.im-app button{cursor:pointer;color:inherit;font-family:inherit;font-size:inherit;background:0 0;border:none}.im-app input,.im-app textarea,.im-app select{outline:none;font-family:inherit}.im-app input:focus-visible,.im-app textarea:focus-visible,.im-app select:focus-visible,.im-app button:focus-visible,.im-app a:focus-visible,.im-app [tabindex]:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:var(--radius-sm)}.im-app ::-webkit-scrollbar{width:6px;height:6px}.im-app ::-webkit-scrollbar-thumb{background:#d5dde9;border-radius:3px}.im-app ::-webkit-scrollbar-thumb:hover{background:#c0cbdb}.im-app ::-webkit-scrollbar-track{background:0 0}.im-rail{background:var(--rail-bg);z-index:30;flex-direction:column;flex:0 0 72px;align-items:center;width:72px;padding:14px 0 16px;display:flex;position:relative}.im-rail-logo{background:linear-gradient(135deg,#5b9cff,#3478f6);border-radius:11px;justify-content:center;align-items:center;width:40px;height:40px;margin-bottom:22px;display:flex;box-shadow:0 4px 12px #3478f673}.im-rail-logo svg{fill:none;stroke:#fff;stroke-width:1.9px;stroke-linecap:round;stroke-linejoin:round;width:22px;height:22px}.im-rail-menu{flex-direction:column;align-items:center;gap:6px;width:100%;margin:0;padding:0;list-style:none;display:flex}.im-rail-item{width:56px;height:58px;color:var(--rail-text);border-radius:10px;flex-direction:column;justify-content:center;align-items:center;gap:4px;text-decoration:none;transition:background .15s,color .15s;display:flex;position:relative}.im-rail-item:hover{color:#d6deea;background:#ffffff0f}.im-rail-item.is-active{color:#5b9cff;background:#3478f62e}.im-rail-item.is-active:before{content:"";background:var(--brand);border-radius:0 3px 3px 0;width:3px;height:22px;position:absolute;top:50%;left:-8px;transform:translateY(-50%)}.im-rail-icon{display:flex;position:relative}.im-rail-icon svg{fill:none;stroke:currentColor;stroke-width:1.8px;stroke-linecap:round;stroke-linejoin:round;width:21px;height:21px}.im-rail-label{font-size:11px}.im-rail-badge{background:var(--danger);color:#fff;text-align:center;border:2px solid var(--rail-bg);border-radius:8px;min-width:16px;height:16px;padding:0 4px;font-size:10px;font-weight:600;line-height:16px;position:absolute;top:-5px;right:-9px}.im-rail-footer{flex-direction:column;align-items:center;gap:10px;margin-top:auto;display:flex}.im-conn-dot{background:#64748b;border-radius:50%;width:10px;height:10px}.im-conn-online{background:var(--success);box-shadow:0 0 0 3px #22c55e29}.im-conn-connecting{background:var(--warn)}.im-conn-offline{background:var(--danger)}.im-rail-back{color:var(--rail-text);writing-mode:vertical-rl;letter-spacing:1px;font-size:10px;text-decoration:none}.im-rail-back:hover{color:#d6deea}.im-body{flex-direction:column;flex:1;min-width:0;display:flex}.im-net-banner{color:#92400e;background:#fff7e6;border-bottom:1px solid #fde68a;padding:8px 16px;font-size:12.5px}.im-workspace{flex:1;min-height:0;display:flex}.im-list-pane{background:var(--card);border-right:1px solid var(--line-strong);flex-direction:column;flex:0 0 280px;width:280px;display:flex;position:relative;overflow:hidden}.im-list-head{flex:0 0 60px;justify-content:space-between;align-items:center;height:60px;padding:0 18px;display:flex}.im-list-head h1{letter-spacing:.2px;margin:0;font-size:17px;font-weight:600}.im-head-actions{gap:4px;display:flex}.im-icon-btn{border-radius:var(--radius-md);width:30px;height:30px;color:var(--muted);justify-content:center;align-items:center;transition:background .15s,color .15s;display:inline-flex}.im-icon-btn:hover{background:var(--bg);color:var(--text)}.im-icon-btn svg{fill:none;stroke:currentColor;stroke-width:1.8px;stroke-linecap:round;stroke-linejoin:round;width:17px;height:17px}.im-search-box{background:var(--bg);border-radius:var(--radius-md);align-items:center;gap:8px;height:36px;margin:0 16px 12px;padding:0 12px;transition:box-shadow .15s,background .15s;display:flex}.im-search-box:focus-within{box-shadow:0 0 0 2px var(--brand-soft), inset 0 0 0 1px var(--brand);background:#fff}.im-search-box svg{width:15px;height:15px;stroke:var(--muted);fill:none;stroke-width:2px;stroke-linecap:round;flex-shrink:0}.im-search-box input{min-width:0;color:var(--text);background:0 0;border:none;flex:1;font-size:13px}.im-search-box input::placeholder{color:var(--muted)}.im-search-box-flat{margin:0 0 10px}.im-add-btn{border-radius:var(--radius-md);background:var(--brand-soft);height:36px;color:var(--brand);margin:0 16px 12px;font-size:13px;font-weight:500;transition:all .15s}.im-add-btn:hover{background:var(--brand);color:#fff}.im-new-group-btn{border-radius:var(--radius-md);background:var(--brand);color:#fff;height:36px;margin:0 16px 12px;font-size:13px;font-weight:500}.im-new-group-btn:hover{background:var(--brand-hover)}.im-conv-list{flex:1;padding:0 8px 12px;overflow-y:auto}.im-conv-item{border-radius:var(--radius-lg);text-align:left;gap:11px;width:100%;padding:10px;transition:background .15s;display:flex;position:relative}.im-conv-item:hover{background:#f7f9fc}.im-conv-item.is-active{background:var(--brand-soft)}.im-conv-item.is-active .im-conv-name{color:var(--brand)}.im-conv-pin{background:var(--brand);border-radius:50%;width:4px;height:4px;position:absolute;top:50%;left:2px;transform:translateY(-50%)}.im-conv-main{flex-direction:column;flex:1;justify-content:center;gap:5px;min-width:0;display:flex}.im-conv-top{align-items:center;gap:8px;display:flex}.im-conv-name{text-overflow:ellipsis;white-space:nowrap;font-size:13.5px;font-weight:500;overflow:hidden}.im-conv-time{color:var(--muted);flex-shrink:0;margin-left:auto;font-size:11px}.im-conv-bottom{align-items:center;gap:8px;display:flex}.im-conv-preview{min-width:0;color:var(--muted);text-overflow:ellipsis;white-space:nowrap;flex:1;font-size:12.5px;overflow:hidden}.im-conv-sender{color:#8a97aa}.im-conv-muted{flex-shrink:0;font-size:11px}.im-badge-unread{background:var(--brand);color:#fff;text-align:center;border-radius:9px;flex-shrink:0;min-width:18px;height:18px;padding:0 5px;font-size:11px;font-weight:600;line-height:18px}.im-archive-toggle{border-radius:var(--radius-md);background:var(--bg);height:32px;color:var(--text-sub);flex:none;margin:0 16px 12px;font-size:12.5px}.im-archive-toggle:hover{background:#e9eef6}.im-avatar{color:#fff;-webkit-user-select:none;user-select:none;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-weight:600;display:inline-flex;overflow:hidden}.im-avatar img{object-fit:cover;width:100%;height:100%}.im-avatar-circle{border-radius:50%!important}.im-avatar-28{border-radius:9px;width:28px;height:28px;font-size:11px}.im-avatar-32{border-radius:10px;width:32px;height:32px;font-size:12px}.im-avatar-34{border-radius:10px;width:34px;height:34px;font-size:12.5px}.im-avatar-36{width:36px;height:36px;font-size:13px}.im-avatar-40{border-radius:12px;width:40px;height:40px;font-size:14px}.im-avatar-44{border-radius:13px;width:44px;height:44px;font-size:15px}.im-avatar-48{border-radius:15px;width:48px;height:48px;font-size:16px}.im-avatar-56{border-radius:17px;width:56px;height:56px;font-size:19px}.im-avatar-64{border-radius:20px;width:64px;height:64px;font-size:22px}.im-avatar-88{border-radius:26px;width:88px;height:88px;font-size:30px}.grad-blue{background:linear-gradient(135deg,#5b9cff,#3478f6)}.grad-purple{background:linear-gradient(135deg,#a78bfa,#7c5cf6)}.grad-teal{background:linear-gradient(135deg,#3fd6c9,#14a79c)}.grad-orange{background:linear-gradient(135deg,#ffc06b,#f59e0b)}.grad-pink{background:linear-gradient(135deg,#ffa0b8,#f472b6)}.grad-green{background:linear-gradient(135deg,#6fdd99,#2fa968)}.grad-slate{background:linear-gradient(135deg,#a9b8cc,#7c8ca3)}.grad-navy{background:linear-gradient(135deg,#5a6b85,#36445a)}.grad-red{background:linear-gradient(135deg,#ff8a8a,#ef4444)}.im-chat-pane{background:var(--card);flex-direction:column;flex:1;min-width:0;display:flex;position:relative}.im-chat-empty{color:var(--muted);justify-content:center;align-items:center;gap:6px}.im-chat-empty small{font-size:12px}.im-chat-head{border-bottom:1px solid var(--line);z-index:10;background:#fff;flex:0 0 60px;align-items:center;gap:12px;height:60px;padding:0 20px;display:flex}.im-chat-head-info{flex:1;min-width:0}.im-chat-head-name{align-items:center;gap:8px;font-size:15px;font-weight:600;display:flex}.im-chat-head-sub{color:var(--muted);text-overflow:ellipsis;white-space:nowrap;align-items:center;gap:6px;margin-top:3px;font-size:12px;display:flex;overflow:hidden}.im-dot-online{background:var(--success);border-radius:50%;width:7px;height:7px;box-shadow:0 0 0 3px #22c55e24}.im-typing{color:var(--brand)}.im-pill{background:var(--brand-soft);color:var(--brand);border-radius:5px;padding:2px 7px;font-size:10.5px;font-weight:500}.im-pill-danger{color:var(--danger);background:#ef44441f}.im-msg-scroll{background:var(--card);flex:1;padding:20px 24px 8px;overflow-y:auto}.im-date-divider{justify-content:center;align-items:center;margin:4px 0 20px;display:flex}.im-date-divider span{color:var(--muted);background:var(--bg);border-radius:10px;padding:3px 10px;font-size:11.5px}.im-load-more{text-align:center;margin-bottom:12px}.im-msg{align-items:flex-start;gap:10px;margin-bottom:18px;display:flex}.im-msg.is-self{flex-direction:row-reverse}.im-msg-body{flex-direction:column;min-width:0;max-width:min(62%,560px);display:flex}.im-msg.is-self .im-msg-body{align-items:flex-end}.im-msg-meta{color:var(--muted);align-items:center;gap:8px;margin-bottom:5px;padding:0 2px;font-size:11.5px;display:flex}.im-msg-name{color:var(--text-sub);font-weight:500}.im-msg.is-self .im-msg-meta{flex-direction:row-reverse}.im-msg-more{opacity:0;color:var(--muted);font-size:14px;line-height:1;transition:opacity .15s}.im-msg:hover .im-msg-more{opacity:1}.im-msg-more:focus-visible{opacity:1;outline:2px solid var(--brand);outline-offset:2px}.im-msg-more:focus{opacity:1}.im-msg-system{text-align:center;margin:10px 0 18px}.im-msg-system span{color:var(--muted);background:var(--bg);border-radius:10px;padding:3px 10px;font-size:11.5px}.im-bubble{color:var(--text);word-break:break-word;background:#f2f5f9;border-radius:4px 12px 12px;max-width:100%;padding:10px 14px;font-size:14px;line-height:1.65}.im-msg.is-self .im-bubble{background:var(--brand);color:#fff;border-radius:12px 4px 12px 12px}.im-text{white-space:pre-wrap}.im-bubble-placeholder{color:var(--muted);font-style:italic}.im-quote-inline{opacity:.9;text-overflow:ellipsis;white-space:nowrap;background:#94a3b829;border-left:2px solid;border-radius:4px;margin-bottom:6px;padding:4px 8px;font-size:12.5px;display:block;overflow:hidden}.im-quote-inline b{margin-right:6px;font-weight:600}.im-bubble-image{padding:4px;line-height:0;background:0 0!important}.im-image-btn{border-radius:10px;padding:0;display:block;overflow:hidden}.im-image-btn img{width:100%;max-width:260px;height:auto;box-shadow:var(--shadow-sm);border-radius:10px;display:block}.im-file-bubble{align-items:center;gap:12px;min-width:240px;max-width:320px;display:flex}.im-file-thumb{color:#fff;letter-spacing:.3px;border-radius:9px;flex-shrink:0;justify-content:center;align-items:center;width:40px;height:40px;font-size:9px;font-weight:700;display:inline-flex}.im-file-thumb-sm{border-radius:9px;width:34px;height:34px;font-size:9.5px}.im-file-thumb-lg{border-radius:14px;width:64px;height:64px;font-size:13px}.im-file-meta{text-align:left;flex-direction:column;flex:1;gap:4px;min-width:0;display:flex}.im-file-name{text-overflow:ellipsis;white-space:nowrap;font-size:13px;font-weight:500;overflow:hidden}.im-file-size{color:var(--muted);font-size:11.5px}.im-msg.is-self .im-file-size{color:#ffffffbf}.im-file-inline{display:inline-block}.im-msg-status{color:var(--muted);align-items:center;gap:6px;margin-top:5px;padding:0 2px;font-size:11px;display:flex}.im-status-failed{color:var(--danger)}.im-new-below{background:var(--brand);color:#fff;box-shadow:var(--shadow-md);z-index:20;border-radius:16px;padding:8px 14px;font-size:12.5px;position:absolute;bottom:190px;right:24px}.im-composer{border-top:1px solid var(--line);background:#fff;flex:none;padding:8px 20px 12px;position:relative}.im-composer-tools{align-items:center;gap:2px;margin-bottom:6px;display:flex}.im-tool-btn{border-radius:var(--radius-md);width:30px;height:30px;color:var(--muted);justify-content:center;align-items:center;transition:background .15s,color .15s;display:inline-flex}.im-tool-btn:hover{background:var(--bg);color:var(--brand)}.im-tool-btn svg{fill:none;stroke:currentColor;stroke-width:1.7px;stroke-linecap:round;stroke-linejoin:round;width:18px;height:18px}.im-divider{background:var(--line-strong);width:1px;height:16px;margin:0 5px}.im-emoji-panel{background:var(--bg);border-radius:var(--radius-md);flex-wrap:wrap;gap:4px;max-width:360px;margin-bottom:6px;padding:8px;display:flex}.im-emoji-panel button{border-radius:6px;width:30px;height:30px;font-size:17px;line-height:1}.im-emoji-panel button:hover{background:#e9eef6}.im-composer-row{align-items:flex-end;gap:12px;display:flex}.im-composer-input{background:var(--bg);border:1px solid #0000;border-radius:10px;flex:1;min-height:42px;max-height:150px;padding:10px 14px;transition:border-color .15s,background .15s}.im-composer-input:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft);background:#fff}.im-composer-input textarea{resize:none;width:100%;color:var(--text);background:0 0;border:none;min-height:22px;max-height:130px;font-size:14px;line-height:1.6}.im-composer-hint{color:var(--muted);text-align:right;-webkit-user-select:none;user-select:none;margin-top:5px;font-size:11px}.im-quote-bar{background:var(--brand-soft2);border-left:3px solid var(--brand);border-radius:var(--radius-sm);color:var(--text-sub);align-items:center;gap:8px;margin-bottom:8px;padding:6px 10px;font-size:12.5px;display:flex}.im-quote-bar span{text-overflow:ellipsis;white-space:nowrap;flex:1;min-width:0;overflow:hidden}.im-btn-send{background:var(--brand);color:#fff;border-radius:var(--radius-md);flex-shrink:0;align-items:center;gap:6px;height:42px;padding:0 18px;font-size:13.5px;font-weight:500;transition:background .15s,box-shadow .15s,opacity .15s;display:inline-flex}.im-btn-send:hover:not(:disabled){background:var(--brand-hover);box-shadow:0 4px 12px #3478f64d}.im-btn-send:disabled{opacity:.5;cursor:not-allowed}.im-btn-send svg{fill:none;stroke:#fff;stroke-width:1.9px;stroke-linecap:round;stroke-linejoin:round;width:16px;height:16px}.im-btn-primary{border-radius:var(--radius-md);background:var(--brand);color:#fff;justify-content:center;align-items:center;gap:6px;height:34px;padding:0 16px;font-size:13px;font-weight:500;text-decoration:none;display:inline-flex}.im-btn-primary:hover{background:var(--brand-hover)}.im-btn-ghost{border-radius:var(--radius-md);background:var(--bg);height:34px;color:var(--text-sub);justify-content:center;align-items:center;gap:6px;padding:0 14px;font-size:13px;font-weight:500;text-decoration:none;display:inline-flex}.im-btn-ghost:hover{color:var(--text);background:#e9eef6}.im-btn-mini{background:var(--bg);height:28px;color:var(--text-sub);border-radius:6px;justify-content:center;align-items:center;padding:0 14px;font-size:12.5px;font-weight:500;display:inline-flex}.im-btn-mini:hover{color:var(--text);background:#e9eef6}.im-btn-mini-primary{background:var(--brand);color:#fff}.im-btn-mini-primary:hover{background:var(--brand-hover);color:#fff}.im-text-btn{color:var(--brand);border-radius:4px;padding:2px 4px;font-size:12px;font-weight:500}.im-text-btn:hover{background:var(--brand-soft)}.im-text-danger{color:var(--danger)}.im-popmenu{border:1px solid var(--line-strong);border-radius:var(--radius-md);box-shadow:var(--shadow-md);z-index:40;background:#fff;flex-direction:column;min-width:104px;margin-top:2px;padding:4px;display:flex;position:absolute;left:44px;right:auto}.im-popmenu-right{left:auto;right:16px}.im-popmenu button{text-align:left;color:var(--text);border-radius:6px;padding:7px 10px;font-size:12.5px}.im-popmenu button:hover{background:var(--bg)}.im-ellipsis{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.im-empty-hint{color:var(--muted);text-align:center;padding:18px 16px;font-size:12.5px;line-height:1.7}.im-form-hint{color:var(--muted);padding:8px 0;font-size:12px;line-height:1.75}.im-skeleton{flex-direction:column;gap:14px;display:flex}.im-skeleton-row{background:linear-gradient(90deg,#f1f4f9 25%,#e9eef6 37%,#f1f4f9 63%) 0 0/400% 100%;border-radius:10px;height:48px;animation:1.4s infinite im-shimmer}@keyframes im-shimmer{0%{background-position:100%}to{background-position:0}}.im-inline-search{border-bottom:1px solid var(--line);background:#fff;flex-wrap:wrap;align-items:center;gap:8px;padding:10px 20px;display:flex}.im-inline-search input{border-radius:var(--radius-md);border:1px solid var(--line-strong);flex:1;min-width:200px;height:32px;padding:0 10px;font-size:12.5px}.im-search-results{width:100%;max-height:220px;margin:0;padding:0;list-style:none;overflow-y:auto}.im-search-results li button{text-align:left;border-radius:6px;gap:10px;width:100%;padding:7px 8px;font-size:12.5px;display:flex}.im-search-results li button:hover{background:var(--bg)}.im-search-time{color:var(--muted);flex-shrink:0}.im-search-text{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.is-flash{animation:1.5s im-flash}@keyframes im-flash{0%{background:var(--brand-soft)}to{background:0 0}}.im-lightbox{z-index:90;background:#0f172acc;justify-content:center;align-items:center;padding:40px;display:flex;position:fixed;inset:0}.im-lightbox img{border-radius:10px;max-width:92vw;max-height:88vh}.im-details-pane{background:var(--card);border-left:1px solid var(--line-strong);flex-direction:column;flex:0 0 280px;width:280px;display:flex;overflow-y:auto}.im-details-narrow{flex:0 0 300px;width:300px}.im-cover{background:linear-gradient(135deg,#8fb6e8,#5b8fd6);flex-shrink:0;height:96px;position:relative;overflow:hidden}.im-cover svg{width:100%;height:100%;display:block}.im-info-head{margin-top:-24px;padding:0 16px;position:relative}.im-avatar-edit{border-radius:12px;width:fit-content;display:inline-block;position:relative}.im-avatar-edit-mask{color:#fff;opacity:0;cursor:pointer;background:#0a141e94;border-radius:12px;place-items:center;font-size:11.5px;font-weight:600;transition:opacity .16s;display:grid;position:absolute;inset:0}.im-avatar-edit:hover 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