/* DSH 远程管理 · design system */
:root{
  --bg:#f5f6f8; --bg-elev:#ffffff; --bg-sunken:#eef0f3; --fg:#111418; --fg-2:#454c57; --muted:#6b7280;
  --line:#e4e7ec; --line-strong:#d4d8df;
  --accent:#2563eb; --accent-2:#4f46e5; --accent-fg:#fff; --accent-soft:rgba(37,99,235,.10);
  --ok:#16a34a; --ok-soft:rgba(22,163,74,.12); --warn:#d97706; --warn-soft:rgba(217,119,6,.12);
  --danger:#dc2626; --danger-soft:rgba(220,38,38,.10);
  --radius:14px; --radius-sm:10px; --radius-lg:20px;
  --shadow:0 1px 2px rgba(16,24,40,.04),0 4px 16px rgba(16,24,40,.06);
  --shadow-lg:0 20px 50px rgba(16,24,40,.18);
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC","Segoe UI",system-ui,sans-serif;
  --mono:ui-monospace,"SF Mono",SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
  --nav-h:60px; --tab-h:64px;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){:root{
  --bg:#0b0d11; --bg-elev:#14171d; --bg-sunken:#0f1216; --fg:#eceef1; --fg-2:#c3c8d0; --muted:#8b939e;
  --line:#232831; --line-strong:#2f3540;
  --accent:#4c8dff; --accent-2:#7c7bff; --accent-soft:rgba(76,141,255,.14);
  --ok:#22c55e; --ok-soft:rgba(34,197,94,.14); --warn:#f59e0b; --warn-soft:rgba(245,158,11,.14);
  --danger:#f05252; --danger-soft:rgba(240,82,82,.14);
  --shadow:0 1px 2px rgba(0,0,0,.3),0 4px 16px rgba(0,0,0,.25); --shadow-lg:0 24px 60px rgba(0,0,0,.55);
  color-scheme:dark;
}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:15px/1.55 var(--font);-webkit-font-smoothing:antialiased;min-height:100vh}
a{color:var(--accent);text-decoration:none}
h1,h2,h3{margin:0;font-weight:650;letter-spacing:-.01em}
h1{font-size:24px}h2{font-size:18px}h3{font-size:16px}
p{margin:0}
code,.mono{font-family:var(--mono)}
.muted{color:var(--muted)}.small{font-size:13px}.tiny{font-size:12px}
.row{display:flex;align-items:center;gap:10px}.row.wrap{flex-wrap:wrap}.grow{flex:1;min-width:0}
.stack{display:flex;flex-direction:column;gap:12px}.stack.lg{gap:20px}
.hidden{display:none!important}
.noscript{padding:24px;text-align:center}

/* boot / spinner */
.boot{min-height:100vh;display:grid;place-items:center}
.spinner{width:28px;height:28px;border-radius:50%;border:3px solid var(--line-strong);border-top-color:var(--accent);animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(1turn)}}

/* buttons */
.btn{appearance:none;border:1px solid var(--line-strong);background:var(--bg-elev);color:var(--fg);font:inherit;font-weight:600;font-size:14px;
  height:40px;padding:0 16px;border-radius:var(--radius-sm);display:inline-flex;align-items:center;justify-content:center;gap:8px;cursor:pointer;
  transition:background .15s,border-color .15s,transform .05s,box-shadow .15s;white-space:nowrap;-webkit-tap-highlight-color:transparent}
.btn:hover{background:var(--bg-sunken)}
.btn:active{transform:translateY(1px)}
.btn:focus-visible,.input:focus-visible{outline:none;box-shadow:0 0 0 3px var(--accent-soft);border-color:var(--accent)}
.btn[disabled]{opacity:.5;cursor:not-allowed}
.btn.primary{background:linear-gradient(135deg,var(--accent),var(--accent-2));border-color:transparent;color:var(--accent-fg);box-shadow:0 4px 14px rgba(37,99,235,.28)}
.btn.primary:hover{filter:brightness(1.05)}
.btn.danger{color:var(--danger);border-color:color-mix(in srgb,var(--danger) 35%,var(--line-strong))}
.btn.danger:hover{background:var(--danger-soft)}
.btn.danger.solid{background:var(--danger);color:#fff;border-color:transparent}
.btn.ghost{border-color:transparent;background:transparent}
.btn.ghost:hover{background:var(--bg-sunken)}
.btn.lg{height:48px;font-size:16px;border-radius:12px;padding:0 20px}
.btn.block{width:100%}
.btn.sm{height:32px;padding:0 12px;font-size:13px}
.btn .spinner{width:16px;height:16px;border-width:2px;border-color:rgba(255,255,255,.4);border-top-color:#fff}
.icon{width:18px;height:18px;flex:none;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}

/* forms */
.field{display:flex;flex-direction:column;gap:6px}
.label{font-size:13px;font-weight:600;color:var(--fg-2)}
.input{width:100%;height:46px;padding:0 14px;border-radius:var(--radius-sm);border:1px solid var(--line-strong);background:var(--bg-elev);color:var(--fg);font:inherit;font-size:16px;transition:border-color .15s,box-shadow .15s}
.input::placeholder{color:var(--muted)}
.input.otp{font-family:var(--mono);font-size:26px;letter-spacing:.45em;text-align:center;height:58px;padding-left:.45em}
.hint{font-size:12.5px;color:var(--muted)}
.err{font-size:13px;color:var(--danger);min-height:1em}
.meter{height:6px;border-radius:6px;background:var(--bg-sunken);overflow:hidden}
.meter>i{display:block;height:100%;width:0;border-radius:6px;transition:width .2s,background .2s}

/* cards & layout */
.card{background:var(--bg-elev);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.card.pad{padding:18px}
.section-title{display:flex;align-items:flex-end;justify-content:space-between;gap:12px;margin:4px 0 14px}
.section-title p{margin-top:2px}

/* auth screens */
.auth{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:32px 18px calc(32px + env(safe-area-inset-bottom))}
.auth .panel{width:100%;max-width:420px}
.brand{display:flex;align-items:center;gap:12px;margin-bottom:22px}
.brand img{width:44px;height:44px;border-radius:12px;box-shadow:0 6px 18px rgba(79,70,229,.3)}
.brand b{font-size:18px;display:block}
.auth .card{padding:26px 22px}
.auth h1{font-size:22px;margin-bottom:6px}
.auth .lead{color:var(--muted);margin-bottom:20px;font-size:14px}
.steps{display:flex;gap:6px;margin-bottom:22px}
.steps span{flex:1;height:4px;border-radius:4px;background:var(--line)}
.steps span.on{background:linear-gradient(90deg,var(--accent),var(--accent-2))}
.step-label{font-size:12px;font-weight:600;color:var(--accent);letter-spacing:.04em;margin-bottom:6px}
.qr{display:flex;justify-content:center;padding:14px;background:#fff;border-radius:14px;border:1px solid var(--line);width:max-content;margin:4px auto 14px}
.qr img{width:184px;height:184px;image-rendering:pixelated;display:block}
.secret{display:flex;align-items:center;gap:8px;background:var(--bg-sunken);border:1px dashed var(--line-strong);border-radius:10px;padding:10px 12px;font-family:var(--mono);font-size:13.5px;word-break:break-all}
.secret span{flex:1}
.done-mark{width:64px;height:64px;border-radius:50%;background:var(--ok-soft);color:var(--ok);display:grid;place-items:center;margin:4px auto 16px}
.done-mark .icon{width:32px;height:32px;stroke-width:2.6}
.foot{margin-top:18px;text-align:center;font-size:12px;color:var(--muted)}

/* app shell */
.topbar{position:sticky;top:0;z-index:20;height:var(--nav-h);display:flex;align-items:center;gap:16px;padding:0 max(16px,env(safe-area-inset-left));
  background:color-mix(in srgb,var(--bg) 82%,transparent);backdrop-filter:saturate(180%) blur(14px);-webkit-backdrop-filter:saturate(180%) blur(14px);border-bottom:1px solid var(--line)}
.topbar .brand{margin:0;gap:10px}.topbar .brand img{width:32px;height:32px;border-radius:9px;box-shadow:none}.topbar .brand b{font-size:16px}
.tabs{display:flex;gap:4px;margin-left:12px}
.tab{display:flex;align-items:center;gap:7px;padding:8px 12px;border-radius:10px;color:var(--fg-2);font-weight:600;font-size:14px}
.tab:hover{background:var(--bg-sunken)}
.tab.on{color:var(--accent);background:var(--accent-soft)}
.user{margin-left:auto;display:flex;align-items:center;gap:10px}
.avatar{width:32px;height:32px;border-radius:50%;display:grid;place-items:center;font-weight:700;font-size:13px;color:#fff;background:linear-gradient(135deg,#0ea5e9,#6366f1)}
main.view{max-width:1120px;margin:0 auto;padding:24px 20px 40px}
.bottombar{display:none}
@media (max-width:760px){
  .tabs,.user .uname{display:none}
  main.view{padding:16px 14px calc(var(--tab-h) + 24px + env(safe-area-inset-bottom))}
  .bottombar{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:30;height:calc(var(--tab-h) + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);
    background:color-mix(in srgb,var(--bg-elev) 90%,transparent);backdrop-filter:saturate(180%) blur(16px);-webkit-backdrop-filter:saturate(180%) blur(16px);border-top:1px solid var(--line)}
  .bottombar a{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;font-size:11px;font-weight:600;color:var(--muted)}
  .bottombar a .icon{width:22px;height:22px}
  .bottombar a.on{color:var(--accent)}
  h1{font-size:21px}
}

/* stats strip */
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:18px}
.stat{padding:14px 16px}
.stat b{font-size:24px;display:block;line-height:1.2;font-variant-numeric:tabular-nums}
.stat span{font-size:12.5px;color:var(--muted)}
@media (max-width:760px){.stats{gap:8px}.stat{padding:12px}.stat b{font-size:20px}}

/* device grid */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:16px}
@media (max-width:760px){.grid{grid-template-columns:1fr;gap:12px}}
.device{padding:18px;display:flex;flex-direction:column;gap:14px;transition:box-shadow .2s,transform .2s}
.device:hover{box-shadow:var(--shadow-lg)}
.device .head{display:flex;align-items:flex-start;gap:12px}
.dev-icon{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;background:var(--bg-sunken);color:var(--fg-2);flex:none;position:relative}
.dev-icon .icon{width:22px;height:22px}
.dot{width:12px;height:12px;border-radius:50%;background:var(--muted);border:2px solid var(--bg-elev);position:absolute;right:-3px;bottom:-3px}
.dot.on{background:var(--ok)}
.dot.on::after{content:"";position:absolute;inset:-2px;border-radius:50%;border:2px solid var(--ok);animation:pulse 2s ease-out infinite}
.dot.wait{background:var(--warn)}
@keyframes pulse{0%{opacity:.8;transform:scale(1)}100%{opacity:0;transform:scale(2.2)}}
.device .name{font-weight:650;font-size:16px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.chip{display:inline-flex;align-items:center;gap:5px;height:22px;padding:0 8px;border-radius:20px;font-size:12px;font-weight:600;background:var(--bg-sunken);color:var(--fg-2);white-space:nowrap}
.chip.ok{background:var(--ok-soft);color:var(--ok)}.chip.warn{background:var(--warn-soft);color:var(--warn)}.chip.bad{background:var(--danger-soft);color:var(--danger)}.chip.accent{background:var(--accent-soft);color:var(--accent)}
.meta{display:flex;flex-wrap:wrap;gap:6px 14px;font-size:13px;color:var(--muted)}
.meta span{display:inline-flex;align-items:center;gap:5px}
.meta .icon{width:14px;height:14px}
.bars{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.bar label{display:flex;justify-content:space-between;font-size:12px;color:var(--muted);margin-bottom:5px}
.bar label b{color:var(--fg);font-variant-numeric:tabular-nums}
.bar .track{height:6px;border-radius:6px;background:var(--bg-sunken);overflow:hidden}
.bar .track i{display:block;height:100%;border-radius:6px;background:linear-gradient(90deg,var(--accent),var(--accent-2))}
.bar .track i.hot{background:linear-gradient(90deg,var(--warn),var(--danger))}
.device .actions{display:flex;gap:8px;margin-top:auto}
.device .actions .btn.primary{flex:1}
.notice{display:flex;gap:10px;align-items:flex-start;padding:12px 14px;border-radius:12px;font-size:13.5px;background:var(--warn-soft);color:var(--fg)}
.notice .icon{color:var(--warn);margin-top:2px}
.notice.info{background:var(--accent-soft)}.notice.info .icon{color:var(--accent)}

/* empty / error states */
.empty{text-align:center;padding:48px 20px}
.empty .art{width:72px;height:72px;border-radius:22px;margin:0 auto 16px;display:grid;place-items:center;background:var(--accent-soft);color:var(--accent)}
.empty .art .icon{width:34px;height:34px}
.empty h3{margin-bottom:6px}.empty p{color:var(--muted);margin-bottom:18px;font-size:14px}
.skeleton{background:linear-gradient(90deg,var(--bg-sunken),var(--line),var(--bg-sunken));background-size:200% 100%;animation:sk 1.2s infinite;border-radius:var(--radius);min-height:190px}
@keyframes sk{to{background-position:-200% 0}}

/* lists */
.list{display:flex;flex-direction:column}
.list>.item{display:flex;align-items:center;gap:14px;padding:14px 18px;border-top:1px solid var(--line)}
.list>.item:first-child{border-top:0}
.item.current{background:var(--accent-soft)}
.item .ico{width:40px;height:40px;border-radius:11px;display:grid;place-items:center;background:var(--bg-sunken);color:var(--fg-2);flex:none}
.item.current .ico{background:var(--accent);color:#fff}
.item .t{font-weight:600}
.kv{display:grid;grid-template-columns:120px 1fr;gap:10px 16px;font-size:14px}
.kv dt{color:var(--muted)}.kv dd{margin:0;word-break:break-all}
@media (max-width:760px){.kv{grid-template-columns:96px 1fr}}

/* audit */
.toolbar{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-bottom:14px}
.seg{display:inline-flex;background:var(--bg-sunken);border-radius:11px;padding:3px;gap:2px;overflow-x:auto;max-width:100%}
.seg button{border:0;background:transparent;color:var(--fg-2);font:inherit;font-size:13px;font-weight:600;padding:7px 12px;border-radius:9px;cursor:pointer;white-space:nowrap}
.seg button.on{background:var(--bg-elev);color:var(--fg);box-shadow:var(--shadow)}
.search{position:relative;flex:1;min-width:180px}
.search .icon{position:absolute;left:12px;top:50%;transform:translateY(-50%);color:var(--muted);width:16px;height:16px}
.search .input{height:40px;padding-left:36px;font-size:14px}
table.tbl{width:100%;border-collapse:collapse;font-size:13.5px}
.tbl th{text-align:left;font-weight:600;color:var(--muted);font-size:12px;padding:10px 16px;border-bottom:1px solid var(--line);background:var(--bg-sunken)}
.tbl td{padding:11px 16px;border-bottom:1px solid var(--line);vertical-align:middle}
.tbl tr:last-child td{border-bottom:0}
.tbl .mono{font-size:12.5px;color:var(--fg-2)}
@media (max-width:760px){
  .tbl thead{display:none}
  .tbl tr{display:grid;grid-template-columns:1fr auto;gap:2px 10px;padding:12px 14px;border-bottom:1px solid var(--line)}
  .tbl td{padding:0;border:0}
  .tbl td.c-time{grid-column:1/-1;order:3;font-size:12px;color:var(--muted)}
  .tbl td.c-ip{order:4;font-size:12px;color:var(--muted)}
  .tbl td.c-user{display:none}
}

/* dialog */
dialog{border:0;padding:0;background:transparent;color:var(--fg);max-width:min(460px,calc(100vw - 24px));width:100%}
dialog::backdrop{background:rgba(10,12,16,.48);backdrop-filter:blur(3px);-webkit-backdrop-filter:blur(3px)}
dialog[open]{animation:pop .18s ease-out}
@keyframes pop{from{opacity:0;transform:translateY(8px) scale(.98)}}
.dlg{background:var(--bg-elev);border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);padding:22px}
.dlg h2{margin-bottom:6px}.dlg .lead{color:var(--muted);font-size:14px;margin-bottom:18px}
.dlg .btns{display:flex;gap:10px;justify-content:flex-end;margin-top:20px}
@media (max-width:760px){
  dialog{max-width:100vw;margin:auto 0 0;width:100vw}
  .dlg{border-radius:22px 22px 0 0;padding:22px 18px calc(22px + env(safe-area-inset-bottom))}
  .dlg .btns{flex-direction:column-reverse}.dlg .btns .btn{width:100%;height:46px}
  @keyframes pop{from{transform:translateY(30px);opacity:.4}}
}
.code-box{display:flex;flex-direction:column;align-items:center;gap:10px;padding:18px;border-radius:16px;background:var(--bg-sunken);border:1px dashed var(--line-strong);margin:6px 0 14px}
.code-box .code{font-family:var(--mono);font-size:28px;font-weight:700;letter-spacing:.08em}
.ring{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums}
.ring .pbar{width:120px;height:5px;border-radius:5px;background:var(--line);overflow:hidden}
.ring .pbar i{display:block;height:100%;background:var(--ok);transition:width 1s linear}
ol.howto{margin:0;padding-left:20px;font-size:13.5px;color:var(--fg-2);display:flex;flex-direction:column;gap:6px}
.fp{font-family:var(--mono);font-size:20px;font-weight:700;letter-spacing:.06em;text-align:center;padding:12px;border-radius:12px;background:var(--bg-sunken)}

/* toasts */
#toasts{position:fixed;z-index:100;left:50%;transform:translateX(-50%);bottom:calc(24px + env(safe-area-inset-bottom));display:flex;flex-direction:column;gap:8px;align-items:center;pointer-events:none;width:max-content;max-width:calc(100vw - 24px)}
@media (max-width:760px){#toasts{bottom:calc(var(--tab-h) + 14px + env(safe-area-inset-bottom))}}
.toast{pointer-events:auto;display:flex;align-items:center;gap:10px;padding:11px 16px;border-radius:12px;background:#1b1f26;color:#f3f4f6;font-size:14px;font-weight:500;box-shadow:var(--shadow-lg);animation:tin .2s ease-out}
.toast .icon{width:18px;height:18px}
.toast.ok .icon{color:#4ade80}.toast.err .icon{color:#f87171}
.toast.out{opacity:0;transform:translateY(6px);transition:all .25s}
@keyframes tin{from{opacity:0;transform:translateY(10px)}}

/* back link, page header */
.back{display:inline-flex;align-items:center;gap:4px;color:var(--muted);font-size:14px;font-weight:600;margin-bottom:12px}
.page-head{display:flex;align-items:center;gap:14px;margin-bottom:18px}
.page-head .dev-icon{width:56px;height:56px;border-radius:16px}
.two{display:grid;grid-template-columns:1.3fr 1fr;gap:16px}
@media (max-width:860px){.two{grid-template-columns:1fr}}

.notice .spinner{width:18px;height:18px;border-width:2px;flex:none}
a.name{color:var(--fg);display:block;text-decoration:none}
a.name:hover{color:var(--accent)}