*{box-sizing:border-box;margin:0;padding:0}
body{font-family:"Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;color:#1f2933;background:#f3f4f6;font-size:14px}
a{color:#0862c3;text-decoration:none}
a:hover{text-decoration:underline}

/* 登录页 */
.login-page{display:flex;align-items:center;justify-content:center;min-height:100vh;background:linear-gradient(135deg,#0862c3,#064a96)}
.login-box{background:#fff;padding:32px;width:340px;border-radius:12px;box-shadow:0 20px 50px rgba(0,0,0,.2)}
.login-box h1{color:#0862c3;font-size:22px}
.login-box .sub{color:#6b7280;margin:4px 0 18px}
.login-box .field{margin-bottom:14px}
.login-box label{display:block;margin-bottom:6px;font-weight:600}
.login-box input{width:100%;padding:10px;border:1px solid #d1d5db;border-radius:8px}

/* 后台布局 */
.admin-shell{display:flex;min-height:100vh}
.sidebar{width:210px;background:#0f1f33;color:#cbd5e1;flex-shrink:0}
.sidebar .brand{padding:18px 20px;color:#fff;font-size:18px;font-weight:700;border-bottom:1px solid rgba(255,255,255,.08)}
.sidebar .brand small{display:block;font-size:12px;color:#93c5fd;font-weight:400}
.sidebar nav{padding:10px 0}
.sidebar nav a{display:block;padding:11px 20px;color:#cbd5e1}
.sidebar nav a:hover{background:rgba(255,255,255,.08);text-decoration:none;color:#fff}
.admin-main{flex:1;display:flex;flex-direction:column}
.topbar{height:52px;background:#fff;border-bottom:1px solid #e5e7eb;display:flex;align-items:center;justify-content:space-between;padding:0 20px;font-weight:600}
.topbar .user{color:#6b7280;font-weight:400}
.topbar-right{display:flex;align-items:center;gap:14px}
.site-switch{display:flex;align-items:center;gap:6px;font-weight:400;font-size:13px;color:#6b7280}
.site-switch select{padding:5px 8px;border:1px solid #d1d5db;border-radius:8px;font:inherit;background:#fff;color:#1f2933;cursor:pointer}
.site-switch select:hover{border-color:#0862c3}
.content{padding:20px}

/* 卡片/面板 */
.cards-row{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:18px}
.stat{background:#fff;border:1px solid #e5e7eb;border-radius:10px;padding:16px 22px;text-align:center;min-width:110px}
.stat b{display:block;font-size:24px;color:#0862c3}
.stat span{color:#6b7280;font-size:13px}
.panel{background:#fff;border:1px solid #e5e7eb;border-radius:10px;padding:20px}
.panel h2{margin-bottom:10px;color:#111827}
.tips{margin:10px 0 0 18px;color:#4b5563;line-height:1.9}

/* 工具栏 */
.toolbar{margin-bottom:14px}
.btn{display:inline-block;background:#0862c3;color:#fff;padding:8px 16px;border-radius:8px;font-weight:600;border:0;cursor:pointer}
.btn:hover{background:#064a96;text-decoration:none}
.btn-block{width:100%;padding:11px;margin-top:6px}

/* 表格 */
.grid{width:100%;border-collapse:collapse;background:#fff;border:1px solid #e5e7eb;border-radius:10px;overflow:hidden}
.grid th,.grid td{padding:11px 14px;text-align:left;border-bottom:1px solid #eef0f3}
.grid th{background:#f8fafc;color:#374151;font-weight:600}
.grid tbody tr:hover{background:#f9fbfe}
.grid a{margin-right:10px}
.muted{color:#9ca3af}

/* 表单 */
.form{max-width:720px;background:#fff;border:1px solid #e5e7eb;border-radius:10px;padding:22px}
.form .field{margin-bottom:16px}
.form label{display:block;margin-bottom:6px;font-weight:600}
.form input[type=text],.form input[type=number],.form input[type=password],.form select,.form textarea{width:100%;padding:9px 11px;border:1px solid #d1d5db;border-radius:8px;font:inherit}
.form textarea{resize:vertical}

/* 提示 / 分页 */
.alert{background:#e8f4ff;border:1px solid #0862c3;color:#064a96;padding:9px 13px;border-radius:8px;margin-bottom:14px}
.pager{margin-top:14px}

/* 演示站只读模式提示条 */
.demo-bar{background:#faeeda;border-bottom:1px solid #ef9f27;color:#633806;padding:8px 20px;font-size:13px;display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.demo-bar b{font-weight:600}
.demo-bar .demo-tag{background:#ba7517;color:#fff;font-size:12px;padding:1px 8px;border-radius:20px;font-weight:500}

/* 登录页演示账号提示 */
.demo-hint{background:#faeeda;border:1px solid #ef9f27;border-radius:8px;padding:12px;margin-bottom:16px;color:#633806;font-size:13px}
.demo-hint .demo-hint-line{display:flex;align-items:center;gap:8px;margin-bottom:4px}
.demo-hint code{font-family:ui-monospace,Menlo,Consolas,monospace;background:#fff;border:1px solid #efc07a;border-radius:5px;padding:1px 7px;color:#633806}
.demo-hint p{margin:0 0 8px;color:#8a5a12}
.demo-tag{background:#ba7517;color:#fff;font-size:12px;padding:1px 8px;border-radius:20px;font-weight:500}
.btn-ghost-sm{background:#fff;border:1px solid #ba7517;color:#8a5a12;font-size:12px;padding:4px 10px;border-radius:6px;cursor:pointer;font:inherit;font-size:12px}
.btn-ghost-sm:hover{background:#fdf3e3}