:root{
  --bg:#f5f5f7; --card:#ffffff; --ink:#1d1d1f; --sub:#6e6e73; --line:#d2d2d7;
  --blue:#0071e3; --blue-hover:#0077ed; --red:#e30000; --green:#248a3d;
  --radius:18px; --font:-apple-system,BlinkMacSystemFont,"SF Pro Text","PingFang SC","Helvetica Neue","Microsoft YaHei",sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:var(--font);background:var(--bg);color:var(--ink);min-height:100vh;
  -webkit-font-smoothing:antialiased;display:flex;flex-direction:column;align-items:center}
.nav{width:100%;max-width:960px;display:flex;align-items:center;justify-content:space-between;padding:18px 24px}
.nav-logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-weight:600;font-size:17px}
.nav-logo img{width:28px;height:28px;border-radius:7px}
.nav-back{color:var(--blue);text-decoration:none;font-size:15px}
.nav-back:hover{text-decoration:underline}
main{width:100%;max-width:960px;padding:24px 24px 60px;flex:1}
.hero{text-align:center;padding:30px 0 26px}
.hero h1{font-size:40px;font-weight:700;letter-spacing:-.02em;line-height:1.1}
.hero p{color:var(--sub);font-size:17px;margin-top:10px;line-height:1.5}
.card{background:var(--card);border-radius:var(--radius);padding:32px;max-width:440px;margin:0 auto;
  box-shadow:0 8px 30px rgba(0,0,0,.06)}
.field{margin-bottom:18px}
.field label{display:block;font-size:14px;color:var(--sub);margin-bottom:7px;font-weight:500}
.field input,.field select{width:100%;height:46px;border:1px solid transparent;border-radius:12px;padding:0 16px;
  font-size:16px;font-family:inherit;background:#f5f5f7;color:var(--ink);outline:none;transition:border .2s,background .2s,box-shadow .2s}
.field input:focus,.field select:focus{border-color:var(--blue);background:#fff;box-shadow:0 0 0 4px rgba(0,113,227,.12)}
.btn{display:block;width:100%;height:48px;border:none;border-radius:980px;font-size:17px;font-weight:600;
  cursor:pointer;font-family:inherit;transition:all .15s}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:var(--blue-hover)}
.btn-primary:disabled{opacity:.5;cursor:not-allowed}
.btn-secondary{background:#e8e8ed;color:#1d1d1f;border:none;font-size:16px}
.btn-secondary:hover{background:#dedee3}
.btn-secondary:disabled{opacity:.5;cursor:not-allowed}
.btn-outline{display:flex;align-items:center;justify-content:center;width:100%;height:48px;border:1.5px solid var(--blue);border-radius:980px;
  font-size:16px;font-weight:600;color:var(--blue);background:#fff;cursor:pointer;
  text-decoration:none;transition:all .15s;box-sizing:border-box;margin-top:12px}
.btn-outline:hover{background:rgba(0,113,227,.07)}
.btn-outline:active{background:rgba(0,113,227,.14)}
.btn-ghost{background:#e8e8ed;color:#1d1d1f;border:none;border-radius:980px;height:48px;font-size:16px;font-weight:600;cursor:pointer;font-family:inherit;transition:all .15s}
.btn-ghost:hover{background:#dedee3}
.btn-danger{background:var(--red);color:#fff;border:none;border-radius:980px;height:48px;font-size:16px;font-weight:600;cursor:pointer;font-family:inherit;transition:all .15s}
.btn-danger:hover{background:#c00000}
.error{color:var(--red);font-size:14px;margin-top:12px;min-height:20px;text-align:center}
.tip{color:var(--sub);font-size:12px;margin-top:16px;text-align:center;line-height:1.5}
.panel{max-width:640px;margin:0 auto;display:flex;flex-direction:column;gap:20px}
.profile{background:var(--card);border-radius:var(--radius);padding:28px 32px;
  box-shadow:0 8px 30px rgba(0,0,0,.06);display:flex;align-items:center;gap:20px}
.avatar{width:64px;height:64px;border-radius:50%;background:linear-gradient(135deg,#0a84ff,#0071e3);
  display:flex;align-items:center;justify-content:center;color:#fff;font-size:28px;font-weight:600;flex-shrink:0}
.profile-info{flex:1}
.profile-name{font-size:22px;font-weight:700}
.profile-type{color:var(--sub);font-size:14px;margin-top:4px}
.section{background:var(--card);border-radius:var(--radius);padding:28px 32px;box-shadow:0 8px 30px rgba(0,0,0,.06)}
.section-title{font-size:20px;font-weight:700;margin-bottom:6px}
.section-sub{color:var(--sub);font-size:14px;margin-bottom:20px;line-height:1.5}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:16px}
.stat{background:#f5f5f7;border-radius:14px;padding:16px}
.stat-label{font-size:13px;color:var(--sub);margin-bottom:6px}
.stat-value{font-size:22px;font-weight:700}
.device{display:flex;align-items:center;gap:14px;padding:14px 0;border-bottom:1px solid var(--line)}
.device:last-child{border-bottom:none}
.device-icon{width:42px;height:42px;border-radius:11px;background:#f5f5f7;display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0}
.device-info{flex:1;min-width:0}
.device-id{font-size:14px;font-weight:600;font-family:"SF Mono",ui-monospace,monospace;word-break:break-all}
.device-time{font-size:12px;color:var(--sub);margin-top:3px}
.device-current{font-size:11px;color:var(--green);font-weight:600;margin-top:3px}
.device-actions{flex-shrink:0}
.empty{color:var(--sub);text-align:center;padding:24px 0;font-size:15px}
.hint{font-size:12px;color:var(--sub);margin-top:12px;line-height:1.5}
.code-box{margin-top:16px;background:#f5f5f7;border-radius:12px;padding:16px;font-family:"SF Mono",ui-monospace,monospace;
  font-size:15px;word-break:break-all;user-select:all}
.group{margin-bottom:4px}
.row{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 0;border-bottom:1px solid var(--line)}
.row:last-child{border-bottom:none}
.row-text{flex:1;min-width:0}
.row-label{font-size:15px;font-weight:500}
.row-sub{font-size:12px;color:var(--sub);margin-top:3px}
.scale{display:flex;align-items:center;gap:10px;flex-shrink:0}
.scale input[type="range"]{width:140px;accent-color:var(--blue)}
.scale span{font-size:14px;font-weight:600;min-width:44px;text-align:right}
.actions{display:flex;flex-direction:column;gap:10px;margin-top:20px}
.switch{position:relative;display:inline-block;width:50px;height:30px;flex-shrink:0}
.switch input{opacity:0;width:0;height:0}
.slider{position:absolute;cursor:pointer;inset:0;background:#e3e3e8;border-radius:30px;transition:.2s}
.slider:before{content:"";position:absolute;height:24px;width:24px;left:3px;bottom:3px;background:#fff;border-radius:50%;transition:.2s}
.switch input:checked+.slider{background:#34c759}
.switch input:checked+.slider:before{transform:translateX(20px)}
.user-row{display:flex;align-items:center;justify-content:space-between;padding:12px 0;border-bottom:1px solid var(--line)}
.user-row:last-child{border-bottom:none}
.user-name{font-weight:600;font-size:15px}
.user-meta{font-size:12px;color:var(--sub);margin-top:2px}
.inline-select{width:auto;height:38px;border:1px solid var(--line);border-radius:10px;padding:0 12px;font-size:14px;font-family:inherit;background:#fff}
footer{width:100%;max-width:960px;padding:0 24px 30px;text-align:center;color:var(--sub);font-size:12px}
.link{color:var(--blue);text-decoration:none}
.link:hover{text-decoration:underline}
.auth-switch{text-align:center;margin-top:18px;font-size:15px;color:var(--sub);line-height:1.5}
.auth-switch a{color:var(--blue);text-decoration:none;font-weight:500}
.auth-switch a:hover{text-decoration:underline}
a.btn-link{text-decoration:none;text-align:center;line-height:48px;box-sizing:border-box;display:block}
.inline-field{display:flex;gap:10px}
.inline-field input{flex:1;min-width:0}
.inline-btn{flex-shrink:0;width:auto;padding:0 22px;height:46px}
.divider{height:1px;background:var(--line);margin:26px 0}
.section-head{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;margin-bottom:16px}
.section-head .section-title{margin-bottom:6px}
.badge{background:var(--red);color:#fff;font-size:12px;font-weight:700;min-width:22px;height:22px;border-radius:11px;
  display:inline-flex;align-items:center;justify-content:center;padding:0 7px;flex-shrink:0}
.field textarea{width:100%;border:1px solid transparent;border-radius:12px;padding:12px 16px;font-size:16px;
  font-family:inherit;background:#f5f5f7;color:var(--ink);outline:none;resize:vertical;line-height:1.5;
  transition:border .2s,background .2s,box-shadow .2s}
.field textarea:focus{border-color:var(--blue);background:#fff;box-shadow:0 0 0 4px rgba(0,113,227,.12)}
.stats-small{grid-template-columns:repeat(auto-fit,minmax(110px,1fr))}
.notice{border-bottom:1px solid var(--line);padding:16px 0}
.notice:last-child{border-bottom:none}
.notice-head{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.dot{width:8px;height:8px;border-radius:50%;background:var(--red);flex-shrink:0}
.notice-title{font-size:15px;font-weight:600}
.notice-meta{font-size:12px;color:var(--sub);margin-left:auto}
.notice-content{font-size:14px;color:var(--sub);margin-top:8px;line-height:1.55;white-space:pre-wrap;word-break:break-word}
.notice-actions{margin-top:10px;text-align:right}
/* 维护公告（登录后显示于通知界面最下边，与客户端 APP 维护公告同源） */
.mnt-banner{color:var(--red);font-size:14px;font-weight:600;margin-bottom:8px}
.mnt-content{font-size:14px;color:var(--sub);line-height:1.6;white-space:pre-wrap;word-break:break-word}
@media (max-width:560px){
  .nav{padding:12px 16px}
  .nav-back{font-size:14px}
  main{padding:16px 16px 40px}
  .hero{padding:20px 0 18px}
  .hero h1{font-size:32px}
  .hero p{font-size:15px}
  .card,.section,.profile{padding:22px 20px}
  .profile{flex-direction:column;text-align:center}
  .section-title{font-size:18px}
  .stats{grid-template-columns:repeat(2,1fr);gap:12px}
  .stat{padding:14px}
  .stat-value{font-size:19px}
  .row{flex-direction:column;align-items:stretch;gap:10px}
  .inline-select{width:100%;height:42px;font-size:16px}
  .btn{font-size:16px}
  .field input,.field select,input,select,textarea{font-size:16px}
  .inline-field{flex-direction:column}
  .inline-btn{width:100%;height:46px}
  .notice-meta{margin-left:0;width:100%}
  .section-head{flex-direction:column;gap:6px}
}