*{box-sizing:border-box}:root{--bg: #f5f6f8;--panel: #ffffff;--border: #e3e6ea;--primary: #2563eb;--muted: #6b7280;--text: #1f2430}body{margin:0;font-family:-apple-system,PingFang TC,Microsoft JhengHei,sans-serif;background:var(--bg);color:var(--text)}button{cursor:pointer;border:none;background:var(--primary);color:#fff;padding:8px 14px;border-radius:6px;font-size:14px}button:disabled{opacity:.5;cursor:default}.link-btn{background:none;color:var(--primary);padding:2px 4px}input,select,textarea{border:1px solid var(--border);border-radius:6px;padding:8px;font-size:14px;font-family:inherit}.muted{color:var(--muted);font-size:13px}.error{color:#dc2626}.center{display:flex;align-items:center;justify-content:center;padding:40px}.login-page{min-height:100vh;display:flex;align-items:center;justify-content:center}.login-card{background:var(--panel);padding:48px;border-radius:12px;box-shadow:0 6px 24px #0000000f;text-align:center}.login-card h1{margin:0 0 8px}.gbtn{display:flex;justify-content:center;margin-top:24px}.app{min-height:100vh;display:flex;flex-direction:column}.topbar{display:flex;align-items:center;gap:24px;background:var(--panel);border-bottom:1px solid var(--border);padding:0 20px;height:56px}.brand{font-weight:700}.topbar nav{display:flex;gap:16px;flex:1}.topbar nav a{text-decoration:none;color:var(--muted);font-size:14px}.topbar nav a.active{color:var(--primary);font-weight:600}.user{display:flex;align-items:center;gap:8px;font-size:14px}.avatar{width:28px;height:28px;border-radius:50%}.role-tag{background:#eef2ff;color:var(--primary);padding:1px 8px;border-radius:4px;font-size:12px;border:1px solid var(--primary)}.content{flex:1;padding:16px}.inbox{display:grid;grid-template-columns:320px 1fr;gap:16px;height:calc(100vh - 90px)}.conv-list{background:var(--panel);border:1px solid var(--border);border-radius:10px;overflow-y:auto}.filters{display:flex;gap:8px;padding:12px;border-bottom:1px solid var(--border);position:sticky;top:0;background:var(--panel)}.filters select{flex:1}.conv-item{padding:12px 14px;border-bottom:1px solid var(--border);cursor:pointer}.conv-item:hover{background:#f9fafb}.conv-item.active{background:#eff6ff}.conv-top{display:flex;justify-content:space-between;align-items:center}.conv-from{font-weight:600;font-size:14px}.conv-subject{font-size:13px;margin:4px 0}.conv-meta{font-size:12px;color:var(--muted)}.badge{font-size:11px;padding:1px 8px;border-radius:4px;border:1px solid transparent}.s-open{background:#fef3c7;color:#92400e;border-color:#f59e0b}.s-pending{background:#dbeafe;color:#1e40af;border-color:#2563eb}.s-closed{background:#e5e7eb;color:#374151;border-color:#9ca3af}.conv-detail{background:var(--panel);border:1px solid var(--border);border-radius:10px;overflow:hidden}.detail-inner{display:flex;flex-direction:column;height:100%}.detail-head{display:flex;justify-content:space-between;align-items:flex-start;padding:16px;border-bottom:1px solid var(--border)}.detail-subject{font-weight:700;font-size:16px}.messages{flex:1;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:12px}.msg{border-radius:8px;padding:12px;max-width:80%}.msg.inbound{background:#f3f4f6;align-self:flex-start}.msg.outbound{background:#eff6ff;align-self:flex-end}.msg-head{display:flex;justify-content:space-between;gap:16px;font-size:12px;margin-bottom:6px}.msg-body{white-space:pre-wrap;font-size:14px;line-height:1.6}.msg-body.html{white-space:normal}.msg-body.html img{max-width:100%;height:auto}.msg-body.html table{max-width:100%}.msg-body.html a{color:var(--primary)}.reply-box{border-top:1px solid var(--border);padding:12px;display:flex;flex-direction:column;gap:8px}.reply-box textarea{resize:vertical}.reply-box button{align-self:flex-end}.admin{background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:20px}.grid{width:100%;border-collapse:collapse;margin:12px 0}.grid th,.grid td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--border);font-size:14px;vertical-align:top}.grid th{color:var(--muted);font-weight:600;font-size:13px}.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin:12px 0}.form-grid label{display:flex;flex-direction:column;gap:4px;font-size:13px;color:var(--muted)}.add-user{display:flex;gap:8px;margin:12px 0}.svc-checks{display:flex;flex-wrap:wrap;gap:10px}.svc-checks label{display:flex;align-items:center;gap:4px;font-size:13px}