:root{--primary-color: #2b6cff;--primary-hover: #1a5cff;--bg-color: #f3f4f6;--sidebar-bg: #ffffff;--panel-bg: #ffffff;--border-color: #e7e7ea;--text-main: #1f2937;--text-sub: #6b7280;--msg-bg-self: #95ec69;--msg-bg-other: #ffffff;--danger-color: #f56c6c;--success-color: #22c55e;--shadow-sm: 0 1px 2px rgba(16, 24, 40, .06);--shadow-md: 0 10px 24px rgba(16, 24, 40, .1)}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background:var(--bg-color);height:100vh;overflow:hidden;color:var(--text-main)}#app{display:flex;height:100vh;width:100vw}.login-screen{width:100%;height:100%;display:flex;justify-content:center;align-items:center;background:radial-gradient(1200px 800px at 20% 0%,rgba(43,108,255,.14),transparent 60%),radial-gradient(900px 700px at 80% 20%,rgba(149,236,105,.16),transparent 55%),#fff;position:fixed;z-index:999;top:0;left:0}.login-box{width:360px;padding:40px;box-shadow:var(--shadow-md);border-radius:12px;background:#fff}.login-title{font-size:24px;font-weight:600;margin-bottom:24px;text-align:center;color:var(--primary-color)}.form-item{margin-bottom:20px}.form-input{width:100%;padding:12px;border:1px solid var(--border-color);border-radius:6px;outline:none;transition:border .3s}.form-input:focus{border-color:var(--primary-color)}.btn-block{width:100%;padding:12px;background:var(--primary-color);color:#fff;border:none;border-radius:6px;cursor:pointer;font-size:16px;font-weight:500}.btn-block:hover{background:var(--primary-hover)}.btn-block:disabled{opacity:.7;cursor:not-allowed}.error-text{color:var(--danger-color);font-size:13px;text-align:center;margin-top:10px}.layout{display:flex;width:100%;height:100%}.left-rail{display:flex;height:100%;flex-shrink:0}.iconbar{width:56px;background:#f7f8fa;border-right:1px solid var(--border-color);display:flex;flex-direction:column;align-items:center;padding:10px 6px;gap:10px}.iconbar-btn{width:44px;height:44px;border-radius:12px;border:1px solid var(--border-color);background:#fff;color:var(--text-sub);cursor:pointer;font-weight:700;letter-spacing:1px}.iconbar-btn:hover{color:var(--text-main);border-color:#2b6cff40}.iconbar-btn.active{color:var(--primary-color);border-color:#2b6cff59;box-shadow:0 6px 14px #2b6cff1f}.notice-bar{position:fixed;top:14px;left:50%;transform:translate(-50%);z-index:10000;min-width:280px;max-width:min(680px,calc(100vw - 24px));padding:10px 12px;border-radius:10px;box-shadow:var(--shadow-md);display:flex;align-items:center;justify-content:space-between;gap:10px;border:1px solid var(--border-color);background:#ffffffeb;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.notice-bar.error{border-color:#f56c6c59}.notice-text{font-size:13px;color:var(--text-main);line-height:1.4}.notice-close{width:26px;height:26px;border:none;background:#0000000d;border-radius:8px;cursor:pointer;color:var(--text-sub);font-size:16px;line-height:1}.notice-close:hover{background:#00000014;color:var(--text-main)}.sidebar{width:320px;background:var(--sidebar-bg);border-right:1px solid var(--border-color);display:flex;flex-direction:column;flex-shrink:0}.sidebar-header{padding:16px;border-bottom:1px solid var(--border-color)}.tabs{display:flex;background:#f5f7fa;border-radius:8px;padding:4px}.tab-item{flex:1;text-align:center;padding:8px 0;cursor:pointer;font-size:14px;border-radius:6px;color:var(--text-sub);transition:all .2s}.tab-item.active{background:#fff;color:var(--primary-color);font-weight:600;box-shadow:0 2px 4px #0000000d}.search-area{padding:12px 16px;border-bottom:1px solid var(--border-color);display:flex;gap:8px}.search-input{flex:1;padding:8px 12px;border:1px solid var(--border-color);border-radius:6px;font-size:13px;outline:none}.search-input:focus{border-color:var(--primary-color)}.btn-action{padding:8px 16px;background:var(--primary-color);color:#fff;border:none;border-radius:6px;cursor:pointer;font-size:13px;white-space:nowrap}.btn-action:hover{background:var(--primary-hover)}.list-header{padding:10px 16px;background:#fafafa;border-bottom:1px solid var(--border-color);display:flex;justify-content:space-between;align-items:center;font-size:12px;color:var(--text-sub);font-weight:500}.icon-btn{border:none;background:none;cursor:pointer;color:var(--text-sub);font-size:14px;padding:4px;border-radius:4px}.icon-btn:hover{background:#e6e6e6;color:var(--primary-color)}.thread-list{flex:1;overflow-y:auto;overflow-x:hidden}.group-title{padding:10px 16px;font-size:12px;color:#667085;font-weight:700;background:#fafafa;border-bottom:1px solid var(--border-color)}.star-dot{color:#f4b400;margin-right:6px}.tag-mini{display:inline-block;margin-left:8px;padding:1px 6px;font-size:11px;border-radius:999px;border:1px solid rgba(0,0,0,.08);color:#667085;background:#00000008}.contact-item{padding:12px 14px;border-bottom:1px solid var(--border-color);cursor:pointer;transition:background .2s}.contact-item:hover{background:#f9fafc}.contact-actions{display:inline-flex;align-items:center;gap:8px}.contact-profile-btn{height:22px;padding:0 8px;border:1px solid var(--border-color);border-radius:999px;background:#fff;color:var(--text-sub);font-size:11px;cursor:pointer}.contact-profile-btn:hover{color:var(--primary-color);border-color:#2b6cff59}.thread-item{padding:12px 14px;border-bottom:1px solid var(--border-color);cursor:pointer;transition:background .2s;position:relative}.thread-item:hover{background:#f9fafc}.thread-item.active{background:#f0f7ff;border-right:3px solid var(--primary-color)}.thread-main{display:flex;justify-content:space-between;align-items:center;margin-bottom:6px}.thread-title{font-size:15px;font-weight:600;color:var(--text-main);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:190px}.thread-time{font-size:12px;color:#667085;font-weight:600}.thread-sub{display:flex;justify-content:space-between;align-items:center}.thread-preview{font-size:13px;color:var(--text-sub);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:220px}.thread-badge{background:var(--danger-color);color:#fff;border-radius:10px;padding:2px 6px;font-size:10px;min-width:18px;text-align:center}.user-profile{padding:16px;border-top:1px solid var(--border-color);display:flex;justify-content:space-between;align-items:center;font-size:14px;background:#fafafa}.user-info{display:flex;align-items:center;gap:8px;font-weight:500}.logout-link{color:var(--text-sub);cursor:pointer;font-size:12px}.logout-link:hover{color:var(--danger-color)}.chat-pane{flex:1;display:flex;flex-direction:column;background:var(--panel-bg);position:relative}.chat-header{min-height:64px;padding:10px 24px;border-bottom:1px solid var(--border-color);display:flex;justify-content:space-between;align-items:center;background:#fff}.chat-header-left{display:flex;align-items:flex-start;gap:10px;min-width:0;flex-direction:column}.chat-header-right{display:flex;align-items:center;gap:10px}.chat-title-row{display:flex;align-items:center;gap:10px;min-width:0}.chat-title{font-size:16px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.chat-remark-row{display:flex;align-items:center;gap:8px;min-width:0;width:100%}.chat-remark-label{font-size:12px;color:var(--text-sub);flex-shrink:0}.chat-remark-text{font-size:12px;color:var(--text-main);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:520px}.chat-remark-input{height:28px;padding:0 10px;border:1px solid var(--border-color);border-radius:8px;outline:none;font-size:12px;width:min(520px,48vw)}.chat-remark-input:focus{border-color:#2b6cff8c}.chat-remark-btn{height:28px;padding:0 10px;border:1px solid var(--border-color);background:#fff;border-radius:8px;cursor:pointer;font-size:12px;color:var(--text-sub)}.chat-remark-btn:hover{color:var(--text-main);background:#00000008}.chat-remark-btn.primary{border-color:#2b6cff59;color:var(--primary-color)}.message-list{flex:1;padding:24px;overflow-y:auto;background:var(--bg-color);display:flex;flex-direction:column;gap:16px}.new-message-divider{text-align:center;color:var(--primary-color);font-size:12px;margin:10px 0;position:relative}.new-message-divider:before,.new-message-divider:after{content:"";position:absolute;top:50%;width:40%;height:1px;background:#dce6f2}.new-message-divider:before{left:0}.new-message-divider:after{right:0}.message-row{display:flex;max-width:78%;align-items:flex-start}.message-row.self{align-self:flex-end;flex-direction:row-reverse}.message-row.other{align-self:flex-start}.message-content{display:flex;flex-direction:column;width:100%}.message-bubble{padding:12px 16px;border-radius:12px;font-size:14px;line-height:1.5;position:relative;word-wrap:break-word;box-shadow:var(--shadow-sm)}.message-bubble.unread{outline:2px solid rgba(34,197,94,.28)}.img-frame{width:260px;max-width:260px;border-radius:10px;overflow:hidden;position:relative;background:#eef2f6}.message-img{width:100%;height:100%;display:block;cursor:pointer;object-fit:contain}.message-row.other .message-bubble{background:var(--msg-bg-other);border:1px solid #e5e7eb;border-top-left-radius:4px}.message-row.self .message-bubble{background:var(--msg-bg-self);color:#111827;border:1px solid rgba(34,197,94,.2);border-top-right-radius:4px}.message-row.other .message-bubble:before{content:"";position:absolute;left:-6px;top:12px;width:12px;height:12px;background:var(--msg-bg-other);border-left:1px solid #e5e7eb;border-bottom:1px solid #e5e7eb;transform:rotate(45deg)}.message-row.self .message-bubble:before{content:"";position:absolute;right:-6px;top:12px;width:12px;height:12px;background:var(--msg-bg-self);border-right:1px solid rgba(34,197,94,.18);border-top:1px solid rgba(34,197,94,.18);transform:rotate(45deg)}.img-skeleton{width:260px;height:180px;border-radius:10px;background:linear-gradient(90deg,#eef2f6 25%,#f7f9fc 37%,#eef2f6 63%);background-size:400% 100%;animation:shimmer 1.2s ease-in-out infinite}.img-skeleton-overlay{position:absolute;top:0;right:0;bottom:0;left:0;background:linear-gradient(90deg,#eef2f6 25%,#f7f9fc 37%,#eef2f6 63%);background-size:400% 100%;animation:shimmer 1.2s ease-in-out infinite}@keyframes shimmer{0%{background-position:100% 0}to{background-position:0 0}}.img-error{width:260px;height:180px;border-radius:10px;border:1px dashed #f56c6c;background:#f56c6c0f;color:#f56c6c;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;cursor:pointer;-webkit-user-select:none;user-select:none;font-size:13px}.img-error small{color:#c45656}.img-preview-mask{position:fixed;top:0;right:0;bottom:0;left:0;background:#000000b8;z-index:9999;display:flex;align-items:center;justify-content:center;padding:24px}.img-preview{max-width:92vw;max-height:92vh;border-radius:12px;background:#fff;object-fit:contain}.profile-mask{position:fixed;top:0;right:0;bottom:0;left:0;background:#0006;z-index:10001;display:flex;align-items:center;justify-content:center;padding:24px}.profile-card{width:min(520px,calc(100vw - 24px));background:#fff;border-radius:16px;box-shadow:var(--shadow-md);border:1px solid var(--border-color);padding:16px 18px}.profile-title{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}.profile-name{font-size:16px;font-weight:800;color:var(--text-main)}.profile-close{width:28px;height:28px;border:none;background:#0000000d;border-radius:10px;cursor:pointer;color:var(--text-sub);font-size:16px;line-height:1}.profile-row{display:flex;align-items:center;gap:10px;padding:8px 0;border-top:1px dashed rgba(0,0,0,.08)}.profile-label{width:54px;font-size:12px;color:var(--text-sub)}.profile-value{flex:1;font-size:13px;color:var(--text-main);word-break:break-all}.profile-input{flex:1;height:30px;padding:0 10px;border:1px solid var(--border-color);border-radius:10px;outline:none;font-size:13px}.profile-actions{display:flex;align-items:center;gap:10px;margin-top:12px;flex-wrap:wrap}.message-meta{font-size:11px;color:#667085;margin-top:4px;padding:0 4px}.message-row.self .message-meta{text-align:right}.chat-footer{padding:16px 24px;background:#fff;border-top:1px solid var(--border-color)}.input-wrapper{display:flex;gap:12px;align-items:flex-end}.chat-textarea{flex:1;padding:12px;border:1px solid var(--border-color);border-radius:8px;resize:none;height:80px;outline:none;font-family:inherit;font-size:14px}.chat-textarea:focus{border-color:var(--primary-color)}.empty-state{flex:1;display:flex;flex-direction:column;justify-content:center;align-items:center;background:#f9fafc;color:var(--text-sub)}.empty-icon{font-size:48px;margin-bottom:16px;opacity:.5}.empty-text{font-size:14px;max-width:300px;text-align:center;line-height:1.6}.search-dropdown{background:#fff;border:1px solid var(--border-color);border-top:none;max-height:200px;overflow-y:auto}.search-result-item{padding:10px 16px;font-size:13px;cursor:pointer;border-bottom:1px solid #f0f0f0;display:flex;justify-content:space-between}.search-result-item:hover{background:#f5f7fa}.loading-mask{position:absolute;top:0;left:0;right:0;bottom:0;background:#ffffffb3;display:flex;justify-content:center;align-items:center;z-index:10;font-size:13px;color:var(--text-sub)}