:root{--primary:#4B3F96;--primary-dark:#3A3078;--primary-light:#F2F0FF;--bg:#F6F7FB;--text:#1F2937;--muted:#6B7280;--border:#E5E7EB;--success:#16A34A;--warn:#F59E0B;--danger:#DC2626}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--text)}button,input,select,textarea{font:inherit}button{cursor:pointer;border:0;border-radius:10px;background:var(--primary);color:#fff;padding:10px 16px}.login-page{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#4B3F96,#7B61B5)}.login-card{width:360px;background:#fff;border-radius:20px;padding:34px;box-shadow:0 18px 50px rgba(0,0,0,.18)}.login-card h1{margin:0;color:var(--primary)}.login-card p{margin:6px 0 22px;color:var(--muted)}.login-card input{width:100%;height:44px;border:1px solid var(--border);border-radius:10px;padding:0 12px;margin-bottom:12px}.login-card button{width:100%;height:44px}.login-tip{margin-top:12px;color:var(--muted);font-size:12px}.admin-shell{display:flex;min-height:100vh}.sidebar{width:220px;background:#fff;border-right:1px solid var(--border);padding:18px 14px;position:fixed;left:0;top:0;bottom:0}.side-title{font-weight:700;font-size:20px;color:var(--primary);margin:6px 8px 22px}.nav{width:100%;display:flex;align-items:center;gap:10px;background:transparent;color:var(--text);padding:12px;border-radius:10px;text-align:left;margin-bottom:6px}.nav.active,.nav:hover{background:var(--primary-light);color:var(--primary)}.main{margin-left:220px;flex:1}.topbar{height:64px;background:#fff;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 24px;font-weight:700}.topbar button{background:#fff;color:var(--primary);border:1px solid var(--primary)}.admin-page{display:none;padding:22px}.admin-page.active{display:block}.stat-grid{display:grid;grid-template-columns:repeat(4,minmax(150px,1fr));gap:14px;margin-bottom:18px}.stat-card{background:#fff;border-radius:16px;padding:18px;border:1px solid var(--border)}.stat-card .num{font-size:28px;font-weight:800;color:var(--primary);margin-top:8px}.stat-card .label{color:var(--muted);font-size:13px}.panel{background:#fff;border:1px solid var(--border);border-radius:16px;padding:18px;margin-bottom:18px}.panel h3{margin:0 0 14px}.toolbar{display:flex;gap:10px;margin-bottom:14px}.toolbar input,.toolbar select,.form-row input,.form-row select,textarea{height:40px;border:1px solid var(--border);border-radius:10px;padding:0 10px;background:#fff}.toolbar input{min-width:260px}.table{width:100%;border-collapse:collapse}.table th,.table td{border-bottom:1px solid var(--border);padding:12px;text-align:left;font-size:14px;vertical-align:top}.table th{color:var(--muted);font-weight:600;background:#FAFAFC}.badge{display:inline-block;padding:3px 8px;border-radius:999px;font-size:12px}.pending{background:#FEF3C7;color:#92400E}.processing{background:#DBEAFE;color:#1E40AF}.replied{background:#D1FAE5;color:#065F46}.resolved{background:#F3F4F6;color:#4B5563}.mini-btn{padding:6px 10px;border-radius:8px;font-size:13px;margin-right:6px}.ghost{background:#fff;color:var(--primary);border:1px solid var(--primary)}.form-panel .form-row{display:flex;gap:10px;margin-bottom:12px}.form-panel input,.form-panel select{flex:1}.hint{font-size:13px;color:var(--muted);margin:14px 0 0}.test-mail-row{display:flex;gap:10px;margin-top:12px}.test-mail-row input{height:40px;border:1px solid var(--border);border-radius:10px;padding:0 10px;min-width:260px}.settings-tabs{display:flex;gap:10px;margin-bottom:14px;background:#fff;border:1px solid var(--border);border-radius:14px;padding:8px}.settings-tab{flex:1;background:#fff;color:var(--text);border:1px solid var(--border)}.settings-tab.active{background:var(--primary);color:#fff;border-color:var(--primary)}.settings-panel{display:none}.settings-panel.active{display:block}.modal{position:fixed;inset:0;background:rgba(0,0,0,.42);display:flex;align-items:center;justify-content:center;padding:24px}.modal-card{width:min(980px,96vw);max-height:88vh;overflow:auto;background:#fff;border-radius:18px;box-shadow:0 20px 60px rgba(0,0,0,.22)}.modal-head{display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--border);padding:16px 20px}.modal-head h3{margin:0}.modal-head button{background:#F3F4F6;color:#111;font-size:22px;padding:2px 12px}.detail-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:16px;padding:18px}.kv{display:grid;grid-template-columns:90px 1fr;gap:8px;font-size:14px;margin-bottom:8px}.kv span:first-child{color:var(--muted)}.images{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}.images img{width:86px;height:86px;object-fit:cover;border-radius:10px;border:1px solid var(--border)}.message{padding:12px;border-radius:12px;background:#F9FAFB;margin-bottom:10px;border-left:4px solid var(--primary)}.message.user{border-left-color:var(--success)}.reply-box textarea{width:100%;height:100px;padding:10px;margin-bottom:10px}.bar{height:10px;background:#E5E7EB;border-radius:999px;overflow:hidden;margin:8px 0 14px}.bar span{display:block;height:100%;background:var(--primary)}.toast-modal{position:fixed;inset:0;z-index:9999;display:none;align-items:center;justify-content:center;padding:24px;background:rgba(17,24,39,.42)}.toast-modal.show{display:flex}.toast-card{width:min(360px,calc(100vw - 40px));background:#fff;border-radius:16px;box-shadow:0 22px 70px rgba(0,0,0,.28);padding:20px;text-align:left;animation:toastPop .16s ease-out}.toast-title{font-weight:800;margin-bottom:10px}.toast-message{line-height:1.6;color:var(--text);word-break:break-word}.toast-card button{display:block;margin:18px 0 0 auto;min-width:76px;border-radius:999px;background:#2563EB}.result-box{background:#0f172a;color:#e5e7eb;border-radius:12px;padding:14px;min-height:80px;white-space:pre-wrap;overflow:auto}.qr-thumb{width:72px;height:72px;object-fit:contain;border:1px solid var(--border);border-radius:10px;background:#fff}.template-grid{display:grid;grid-template-columns:repeat(2,minmax(260px,1fr));gap:12px}.template-grid label{display:block}.template-grid textarea{width:100%;height:116px;padding:10px;margin-top:8px;line-height:1.5}@keyframes toastPop{from{opacity:0;transform:translateY(8px) scale(.96)}to{opacity:1;transform:translateY(0) scale(1)}}@media(max-width:800px){.sidebar{position:static;width:100%;height:auto}.admin-shell{display:block}.main{margin-left:0}.stat-grid{grid-template-columns:1fr 1fr}.toolbar,.form-panel .form-row{flex-direction:column}.detail-grid{grid-template-columns:1fr}}