:root{--acrylic: rgba(255, 255, 255, .55);--acrylic-strong: rgba(255, 255, 255, .72);--acrylic-soft: rgba(255, 255, 255, .38);--acrylic-border: rgba(255, 255, 255, .75);--acrylic-border-inner: rgba(255, 255, 255, .9);--text: #16181d;--text-dim: rgba(24, 27, 33, .62);--primary: #0078d4;--primary-hover: #106ebe;--primary-active: #005a9e;--primary-soft: rgba(0, 120, 212, .12);--danger: #c42b1c;--success: #107c10;--radius: 8px;--radius-lg: 12px;--shadow-flyout: 0 8px 32px rgba(0, 0, 0, .14), 0 2px 8px rgba(0, 0, 0, .08), inset 0 1px 0 rgba(255, 255, 255, .6);--shadow-card: 0 4px 16px rgba(0, 0, 0, .1), inset 0 1px 0 rgba(255, 255, 255, .6)}*{box-sizing:border-box}html,body{margin:0;height:100%;color:var(--text);font-family:Segoe UI Variable,Segoe UI,system-ui,-apple-system,PingFang SC,Microsoft YaHei,sans-serif;font-size:14px;background:linear-gradient(135deg,#0067c0,#2b88d8 28%,#6ea9e0 55%,#a9c7ec 78%,#dce9fa);background-attachment:fixed}#app{height:100%}.login-card,.visitor-card,.sidebar,.chat,.modal,.qr-box{background:var(--acrylic);-webkit-backdrop-filter:blur(30px) saturate(180%);backdrop-filter:blur(30px) saturate(180%);border:1px solid var(--acrylic-border);box-shadow:var(--shadow-flyout)}button{font-family:inherit;font-size:14px;cursor:pointer;border:1px solid rgba(0,0,0,.16);border-radius:6px;padding:8px 18px;background:var(--acrylic-strong);color:var(--text);box-shadow:inset 0 1px #fffc,0 1px 2px #00000014;transition:background .12s,transform .06s,box-shadow .12s}button:hover{background:#f5f8fce6}button:active{transform:translateY(1px);background:#e6ecf5f2}button:not(.ghost){background:var(--primary);border-color:transparent;color:#fff;box-shadow:0 2px 6px #0078d459,inset 0 1px #ffffff40}button:not(.ghost):hover{background:var(--primary-hover)}button:not(.ghost):active{background:var(--primary-active)}button.ghost{background:var(--acrylic-soft);color:var(--text);border:1px solid var(--acrylic-border);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}button.ghost:hover{background:var(--acrylic-strong)}input,textarea,select{width:100%;background:#ffffffb3;border:1px solid rgba(0,0,0,.18);border-radius:6px;padding:9px 12px;color:var(--text);font-size:14px;font-family:inherit;outline:none;box-shadow:inset 0 1px #ffffffb3;transition:border-color .12s,box-shadow .12s}input:hover,textarea:hover{border-color:#0000004d}input:focus,textarea:focus{border-color:var(--primary);box-shadow:0 0 0 2px var(--primary-soft)}.login-wrap{height:100%;display:flex;align-items:center;justify-content:center;padding:20px}.login-card{width:100%;max-width:380px;border-radius:var(--radius-lg);padding:34px 30px}.login-card h1{margin:0 0 4px;font-size:24px;font-weight:600}.login-card p{margin:0 0 26px;color:var(--text-dim)}.field{margin-bottom:16px}.field label{display:block;margin-bottom:6px;color:var(--text-dim);font-weight:500}.login-card button{width:100%;margin-top:10px}.error-text{color:var(--danger);margin:10px 0 0;font-size:13px;min-height:18px}.m-app{height:100%;padding:10px}.m-page{height:100%;display:flex;flex-direction:column;min-height:0;border-radius:var(--radius-lg);overflow:hidden;background:var(--acrylic);-webkit-backdrop-filter:blur(30px) saturate(180%);backdrop-filter:blur(30px) saturate(180%);border:1px solid var(--acrylic-border);box-shadow:var(--shadow-flyout)}.m-page[hidden]{display:none}.m-header{flex:0 0 auto;padding:12px 14px;border-bottom:1px solid rgba(255,255,255,.5);display:flex;align-items:center;justify-content:space-between;gap:8px}.m-header .brand{font-weight:600;font-size:16px}.m-header .title{font-weight:600;font-size:15px;flex:1;text-align:center;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.m-header #btn-back{flex:0 0 auto;font-weight:600}.visitor-list{flex:1;overflow-y:auto;padding:8px}.visitor-item{padding:12px 14px;border:1px solid transparent;border-radius:8px;cursor:pointer;margin-bottom:4px;transition:background .12s}.visitor-item:hover{background:#ffffff73}.visitor-item.active{background:var(--primary-soft);border:1px solid rgba(0,120,212,.35);box-shadow:inset 0 1px #fff9}.visitor-item .row1{display:flex;justify-content:space-between;align-items:center;margin-bottom:4px}.visitor-item .name{font-weight:500}.visitor-item .time{color:var(--text-dim);font-size:12px}.visitor-item .preview{color:var(--text-dim);font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.badge{background:var(--danger);color:#fff;border-radius:20px;min-width:18px;padding:1px 7px;font-size:11px;text-align:center}.status-dot{display:inline-block;width:8px;height:8px;border-radius:50%;margin-right:6px}.status-dot.active{background:var(--success);box-shadow:0 0 6px #107c1080}.status-dot.closed{background:var(--text-dim)}.chat-body{flex:1;overflow-y:auto;padding:18px;display:flex;flex-direction:column;gap:14px}.msg{display:flex;max-width:72%}.msg.in{align-self:flex-start}.msg.out{align-self:flex-end}.bubble{padding:10px 14px;border-radius:12px;line-height:1.5;word-break:break-word;border:1px solid rgba(255,255,255,.5);box-shadow:var(--shadow-card)}.msg.in .bubble{background:#ffffffb8;border-bottom-left-radius:4px}.msg.out .bubble{background:#0078d4d9;color:#fff;border-color:#fff3;border-bottom-right-radius:4px}.msg .meta{font-size:11px;color:var(--text-dim);margin-top:4px}.msg.out .meta{color:#ffffffbf}.chat-empty{margin:auto;color:var(--text-dim);text-align:center}.chat-input{flex:0 0 auto;border-top:1px solid rgba(255,255,255,.5);padding:12px 14px;display:flex;gap:10px;align-items:flex-end}.chat-input textarea{resize:none;height:46px}.visitor-wrap{height:100%;display:flex;align-items:center;justify-content:center;padding:20px}.visitor-card{width:100%;max-width:420px;border-radius:var(--radius-lg);padding:30px;text-align:center}.qr-box{background:#ffffffeb;border-radius:10px;padding:14px;width:240px;height:240px;margin:18px auto;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-card)}.qr-box img{max-width:100%;max-height:100%}.qr-status{color:var(--text-dim);margin:8px 0}.toolbar{display:flex;gap:8px}.modal-mask{position:fixed;top:0;right:0;bottom:0;left:0;background:#14182059;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:50}.modal{width:100%;max-width:460px;border-radius:var(--radius-lg);padding:24px}.modal h3{margin:0 0 18px;font-size:18px}.modal .actions{display:flex;justify-content:flex-end;gap:10px;margin-top:18px}.switch-row{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}.muted{color:var(--text-dim)}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-thumb{background:#00000040;border-radius:8px}::-webkit-scrollbar-thumb:hover{background:#0006}::-webkit-scrollbar-track{background:transparent}