:root{font-family:Inter,"PingFang SC","Microsoft YaHei",sans-serif;color:#253552;background:#f5f8fc;--blue:#2f72ee;--soft:#edf3ff;--line:#e0e8f4;--muted:#7d8ca5}*{box-sizing:border-box}body{margin:0;min-width:1120px}button,input,select,textarea{font:inherit}button:disabled{cursor:not-allowed}.app-shell{height:100vh;min-height:680px;display:grid;grid-template-columns:328px minmax(0,1fr);overflow:hidden;background:#f5f8fc}.nav{background:linear-gradient(180deg,#fff,#f5f9ff);border-right:1px solid var(--line);padding:30px 20px 24px;overflow-y:auto}.brand{min-height:80px;display:flex;align-items:center;gap:15px;padding:2px 22px 22px;border-bottom:1px solid #e8eef7}.brand-logo{width:48px;height:48px;flex:none}.brand strong{display:block;font-size:22px}.brand small{display:block;margin-top:7px;color:#8697b2;letter-spacing:.12em;font-size:12px;font-weight:700}.workspace-switch{position:relative;margin:20px 0 25px;padding:18px 20px;border:1px solid #dce6f6;border-radius:16px;background:#f5f8ff}.workspace-switch span{display:block;color:#96a4ba;font-size:13px}.workspace-switch strong{display:block;margin-top:7px;font-size:15px}.workspace-switch b{position:absolute;right:20px;bottom:18px;color:#657694;font-size:20px}.nav nav{display:grid;gap:5px}.nav-group{margin:9px 18px 6px;color:#9aa8bd;font-size:13px}.nav a{min-height:48px;display:flex;align-items:center;gap:15px;padding:0 17px;text-decoration:none;color:#617493;border-radius:12px;font-size:18px}.nav a i{width:23px;font-style:normal;font-size:23px;text-align:center;color:#667b9f}.nav a.active{color:var(--blue);background:#eaf0ff;font-weight:750}.nav a.active i{color:var(--blue)}.workspace{min-width:0;display:grid;grid-template-rows:86px minmax(0,1fr)}.topbar{display:flex;align-items:center;gap:18px;padding:0 34px;background:#fff;border-bottom:1px solid var(--line)}.global-search{height:48px;width:min(485px,36vw);display:flex;align-items:center;gap:12px;padding:0 13px 0 17px;border:1px solid #dce5f2;border-radius:13px;color:#90a1b7;background:#fbfcff}.global-search span{font-size:30px;transform:rotate(-18deg)}.global-search input{min-width:0;flex:1;border:0;outline:0;background:transparent}.global-search input::placeholder{color:#a2afc1}.global-search kbd{border:1px solid #e0e7f2;border-radius:6px;padding:4px 7px;color:#91a0b5;background:#fff;font-size:11px}.top-actions{margin-left:auto;display:flex;gap:10px}.top-actions button,.manage-account{min-height:42px;padding:0 15px;border:1px solid #dce4f0;border-radius:11px;background:#fff;color:#45556e;font-weight:650}.top-actions button:first-child,.manage-account{color:var(--blue);border-color:#bfd4ff;background:#f5f8ff}.top-actions button:disabled{opacity:1}.user-chip{display:flex;align-items:center;gap:10px;white-space:nowrap}.user-chip span{display:grid;place-items:center;width:42px;height:42px;border-radius:12px;background:#e1f3f8;color:#306092;font-size:20px;font-weight:800}.user-chip b{font-size:15px}.communication-page{min-height:0;display:grid;grid-template-rows:82px 126px minmax(0,1fr);gap:15px;padding:26px 32px 24px;overflow:hidden}.channel-tabs,.accountbar,.columns{background:#fff;border:1px solid var(--line);border-radius:20px}.channel-tabs{display:flex;align-items:stretch;overflow:hidden;padding:0 24px}.channel-tabs button{display:flex;align-items:center;gap:10px;padding:0 21px;border:0;border-left:1px solid transparent;border-right:1px solid transparent;background:#fff;color:#63738e;font-size:16px;font-weight:700;white-space:nowrap}.channel-tabs button:disabled{opacity:.55}.channel-tabs button.selected{color:var(--blue);border-color:var(--blue);box-shadow:inset 0 -2px var(--blue)}.channel-tabs i{display:grid;place-items:center;width:31px;height:31px;border-radius:9px;background:#eaf1ff;color:#3476ef;font-style:normal;font-size:21px}.channel-tabs img{width:34px;height:34px;border-radius:50%;background:#25d366;object-fit:cover;object-position:left}.channel-tabs small{padding:3px 7px;border-radius:6px;background:#f1f4f8;color:#9ba8ba;font-size:11px}.accountbar{display:flex;align-items:center;gap:15px;padding:19px 24px}.account-avatar{width:52px;height:52px;border-radius:16px;background:#eff5ff;display:grid;place-items:center;overflow:hidden}.account-avatar img{width:42px;height:42px;border-radius:50%;background:#25d366;object-fit:cover;object-position:left}.accountbar label{display:grid;gap:5px;min-width:260px;color:#91a0b6;font-size:13px}.accountbar select{border:0;outline:0;background:transparent;color:#2e3e58;font-weight:750;font-size:17px}.status{display:flex;align-items:center;gap:8px;padding:8px 12px;border-radius:10px;color:#9a6e22;background:#fffaf0;font-size:14px;font-weight:700}.status span{width:10px;height:10px;border-radius:50%;background:#d3a14c}.status.connected{color:#16704b;background:#eefaf4}.status.connected span{background:#26a96e}.manage-account{margin-left:auto}.columns{min-height:0;display:grid;grid-template-columns:minmax(280px,28%) minmax(450px,1fr) minmax(300px,25%);overflow:hidden}.pane{min-width:0;overflow-y:auto;background:#fff}.conversation-pane,.chat-pane{border-right:1px solid var(--line)}.pane-head,.chat-head{min-height:108px;padding:0 30px;border-bottom:1px solid var(--line);display:flex;align-items:center}.pane-head{justify-content:space-between}.pane-head h2,.chat-head h2{margin:0;font-size:22px}.muted-label,.chat-head span{color:#9aa8bc;font-size:13px}.filters{display:flex;gap:8px;padding:16px 22px;border-bottom:1px solid #edf1f7}.filters button,.tabs button{border:0;background:transparent;padding:8px 11px;color:#8593a8;border-radius:8px}.filters .selected,.tabs .selected{color:var(--blue);background:var(--soft);font-weight:700}.empty,.message-empty{min-height:250px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:9px;padding:36px 26px;text-align:center;color:#96a4b8}.empty strong,.message-empty strong{color:#60728e;font-size:17px}.message-empty p{margin:0;font-size:13px}.chat-pane{display:grid;grid-template-rows:108px minmax(0,1fr) 88px}.chat-head{gap:16px}.chat-channel-mark{display:grid;place-items:center;width:60px;height:60px;border-radius:50%;background:#eaf0ff;color:#477bf0;font-weight:800;font-size:27px}.composer{display:grid;grid-template-columns:1fr 84px;gap:10px;padding:13px 18px;border-top:1px solid var(--line)}.composer textarea{min-height:58px;resize:none;padding:10px;border:1px solid #e0e7f1;border-radius:10px;background:#fafcff}.composer button{border:0;border-radius:10px;background:#c7d2e3;color:#fff}.tabs{min-height:64px;display:flex;align-items:center;gap:7px;padding:0 17px;border-bottom:1px solid var(--line)}.detail-pane section{padding:20px 22px;border-bottom:1px solid #edf1f6}.section-title{display:flex;align-items:center;justify-content:space-between}.section-title h3{margin:0;font-size:16px}.section-title button{border:0;background:transparent;color:var(--blue);font-size:13px}.section-title button:disabled{color:#a6b2c3}.empty-card{margin-top:13px;padding:17px;border-radius:11px;background:#f7f9fd;color:#95a3b7;text-align:center;font-size:13px}.message-list{padding:22px;display:flex;flex-direction:column;gap:12px}.bubble{max-width:70%;padding:11px 13px;border-radius:12px;background:#f0f4fa;line-height:1.5}.bubble.outbound{align-self:flex-end;background:#eaf2ff}.bubble small{display:block;margin-top:5px;color:var(--muted)}.customer-details,.record-list{display:grid;gap:8px;text-align:left}.record{padding:9px;border:1px solid var(--line);border-radius:7px;background:#fff}
.login-layer{position:fixed;inset:0;z-index:20;display:grid;place-items:center;background:linear-gradient(135deg,#edf4ff,#f8fbff)}.login-layer.hidden{display:none}.login-card{width:360px;display:grid;gap:15px;padding:34px;border:1px solid var(--line);border-radius:18px;background:#fff;box-shadow:0 24px 80px #7892bd33}.brand-mark{display:grid;place-items:center;width:36px;height:36px;border-radius:11px;background:var(--blue);color:#fff;font-weight:800}.login-card h1{margin:0;font-size:24px}.login-card p{margin:-8px 0 4px;color:var(--muted)}.login-card label{color:#42526c;font-size:13px}.login-card input{width:100%;margin-top:6px;padding:11px 12px;border:1px solid var(--line);border-radius:9px}.login-card button{border:0;padding:12px;border-radius:9px;background:var(--blue);color:#fff;font-weight:700}.login-card output,#editorError{color:#a33b31;font-size:13px}dialog{border:0;border-radius:16px;box-shadow:0 18px 70px #1d355966;width:420px}dialog::backdrop{background:#20365d66}#editorForm,#editorFields{display:grid;gap:12px}#editorFields label{display:grid;gap:5px;font-size:13px}#editorFields input,#editorFields textarea{padding:9px;border:1px solid var(--line);border-radius:7px}.dialog-actions{display:flex;justify-content:flex-end;gap:8px;margin-top:6px}.dialog-actions button{padding:8px 13px;border:1px solid var(--line);border-radius:7px;background:#fff}.dialog-actions #editorSave,.account-form .dialog-actions button{background:var(--blue);color:#fff}.account-dialog{width:min(720px,calc(100vw - 48px));max-height:82vh;overflow-y:auto}.dialog-heading{display:flex;justify-content:space-between;gap:20px;align-items:flex-start}.dialog-heading p,.account-form p,.technical-details p{color:var(--muted);font-size:13px;margin:6px 0 0}.icon-button{border:0;background:transparent;color:var(--muted);font-size:24px}.account-manager-list{display:grid;gap:10px;margin:20px 0}.managed-account{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:10px 16px;padding:14px;border:1px solid var(--line);border-radius:10px}.managed-account span,.managed-account small{display:block;margin-top:5px;color:var(--muted);overflow-wrap:anywhere}.managed-account button{border:1px solid var(--line);border-radius:8px;padding:7px 10px}.managed-account details{grid-column:1/-1;color:var(--muted);font-size:13px}.account-form{border-top:1px solid var(--line);padding-top:18px}.account-fields{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:14px}.account-fields label{display:grid;gap:6px;font-size:13px}.account-fields input{border:1px solid var(--line);border-radius:8px;padding:10px}#accountError{display:block;color:#a33b31;font-size:13px;margin-top:8px}.technical-details{margin-top:22px;padding-top:16px;border-top:1px solid var(--line);color:#52647f;font-size:13px}.qr-panel{display:grid;grid-template-columns:220px 1fr;gap:18px;align-items:center;margin:18px 0;padding:16px;border:1px solid #d3e2fd;border-radius:10px;background:#f4f8ff}.qr-panel[hidden]{display:none}.qr-panel img{width:220px;height:220px;background:#fff}.qr-panel p,.qr-panel small{color:var(--muted);line-height:1.5}@media(max-width:1250px){.app-shell{grid-template-columns:240px minmax(0,1fr)}.communication-page{padding:18px}.topbar{padding:0 18px}.top-actions button:nth-child(n+3){display:none}.columns{grid-template-columns:270px minmax(420px,1fr) 300px}}
/* Original-site visual assets and narrow-window behavior. */
body{min-width:0}.brand-logo{object-fit:contain}.drawer-close,.menu-button{display:none;border:0;background:transparent;color:#53647e}.drawer-close{margin-left:auto;font-size:25px}.nav a svg,.menu-button svg,.global-search svg{width:19px;height:19px;flex:none;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}.nav a svg{color:#667b9f}.global-search svg{width:21px;height:21px;color:#91a0b5}.communication-page{grid-template-rows:82px 92px minmax(0,1fr)}
@media(max-width:900px){.app-shell{display:block}.nav{position:fixed;z-index:30;inset:0 auto 0 0;width:250px;transform:translateX(-100%);transition:transform .18s ease;box-shadow:12px 0 30px #20345c28;padding:20px 14px}.nav-open .nav{transform:translateX(0)}.drawer-close,.menu-button{display:grid;place-items:center}.menu-button{width:34px;height:34px}.workspace{height:100vh;grid-template-rows:58px minmax(0,1fr)}.topbar{height:58px;padding:0 18px;gap:10px}.global-search{height:38px;width:330px}.top-actions{display:none}.user-chip b{display:none}.user-chip span{width:36px;height:36px;border-radius:10px}.communication-page{grid-template-rows:58px 76px minmax(0,1fr);padding:12px;gap:10px;overflow:auto}.channel-tabs{padding:0 10px;border-radius:14px;overflow-x:auto}.channel-tabs button{padding:0 13px;font-size:13px}.channel-tabs button:not(.selected):not(:first-child){display:none}.accountbar{padding:10px 14px;border-radius:14px;gap:10px}.account-avatar{width:40px;height:40px;border-radius:12px}.account-avatar img{width:32px;height:32px}.accountbar label{min-width:0;flex:1;font-size:11px}.accountbar select{max-width:190px;font-size:14px}.status{font-size:11px;padding:6px 8px}.manage-account{min-height:34px;padding:0 9px;font-size:12px}.columns{min-height:460px;min-width:1030px;border-radius:14px}.pane-head,.chat-head{min-height:72px;padding:0 18px}.chat-pane{grid-template-rows:72px minmax(0,1fr) 78px}.pane-head h2,.chat-head h2{font-size:17px}.detail-pane section{padding:16px}.nav a{min-height:42px;font-size:15px}.brand{min-height:55px;padding:0 8px 14px}.brand-logo{width:38px;height:38px}.brand strong{font-size:17px}.brand small{font-size:9px}.workspace-switch{margin:14px 0;padding:13px}.nav-group{font-size:11px;margin:8px 12px 4px}}