/* ===========================================================
   dudown.com 产品原型 UI Kit — "dudown" 服务状态 / 宕机监测站
   定位：信号(signal) · 主动探测 · 干净 · 暗墨色 + 信号绿/琥珀/红状态态
   自包含离线；与文档 doc-style 区分（这是真实产品外观）
   状态色：up #16a34a · degraded #d97706 · down #dc2626
   =========================================================== */
:root{
  --ink:#0f172a; --ink-soft:#334155; --muted:#64748b; --line:#e2e8f0; --line-2:#eef2f6;
  --bg:#ffffff; --bg-soft:#f8fafc; --bg-tint:#f1f5f9; --bg-deep:#0b1220;
  --brand:#2563eb; --brand-2:#3b82f6; --brand-ink:#1d4ed8;
  --up:#16a34a; --up-bg:#e7f6ec; --up-line:#bbe6c8;
  --deg:#d97706; --deg-bg:#fdf2e3; --deg-line:#f4dcae;
  --down:#dc2626; --down-bg:#fdeaea; --down-line:#f5c2c2;
  --radius:16px; --radius-sm:10px; --radius-xs:8px;
  --sh:0 1px 2px rgba(15,23,42,.05),0 12px 30px rgba(15,23,42,.09);
  --sh-sm:0 1px 2px rgba(15,23,42,.06),0 3px 10px rgba(15,23,42,.05);
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Noto Sans CJK SC","Helvetica Neue",Arial,sans-serif;
  --mono:"SFMono-Regular",ui-monospace,Menlo,Consolas,"Liberation Mono",monospace;
}
*{box-sizing:border-box}
body{margin:0;font-family:var(--font);color:var(--ink);background:var(--bg-soft);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:var(--brand);text-decoration:none}
img{max-width:100%}
.wrap{max-width:1080px;margin:0 auto;padding:0 18px}
.wrap-narrow{max-width:760px;margin:0 auto;padding:0 18px}

/* ---- mock back-to-gallery top bar ---- */
.mockbar{background:var(--bg-deep);color:#cbd5e1;font-size:12px;padding:7px 0}
.mockbar .wrap{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.mockbar a{color:#93c5fd;font-weight:600}
.mockbar .tagm{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14);border-radius:999px;padding:2px 9px;font-weight:600}
.mockbar .sp{margin-left:auto}

/* ---- top nav ---- */
.nav{position:sticky;top:0;z-index:40;background:rgba(255,255,255,.92);backdrop-filter:saturate(180%) blur(10px);border-bottom:1px solid var(--line)}
.nav .row{display:flex;align-items:center;gap:16px;height:58px}
.brand{display:flex;align-items:center;gap:9px;font-weight:800;font-size:18px;color:var(--ink);letter-spacing:-.02em}
.brand .logo{width:30px;height:30px;border-radius:9px;background:linear-gradient(135deg,var(--up),#22c55e);display:flex;align-items:center;justify-content:center;color:#fff;font-size:16px;box-shadow:var(--sh-sm);position:relative}
.brand .logo::after{content:"";position:absolute;width:7px;height:7px;border-radius:50%;background:#fff;right:5px;bottom:5px;box-shadow:0 0 0 2px var(--up)}
.brand small{display:block;font-size:10px;color:var(--muted);font-weight:600;letter-spacing:.02em;margin-top:-3px}
.nav nav{display:flex;gap:2px;margin-left:4px}
.nav nav a{font-size:14px;color:var(--ink-soft);padding:7px 11px;border-radius:999px;font-weight:600}
.nav nav a:hover,.nav nav a.active{background:var(--bg-tint);color:var(--brand-ink)}
.nav .right{margin-left:auto;display:flex;align-items:center;gap:9px}
.lang{font-size:12.5px;border:1px solid var(--line);border-radius:999px;padding:5px 11px;color:var(--ink-soft);background:#fff;cursor:pointer;font-weight:600}
.lang:hover{border-color:var(--brand-2);color:var(--brand-ink)}
@media(max-width:820px){.nav nav{display:none}}

/* ---- buttons ---- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:none;border-radius:10px;padding:11px 18px;font-size:14.5px;font-weight:700;cursor:pointer;font-family:inherit;transition:transform .1s,box-shadow .1s}
.btn.primary{background:linear-gradient(135deg,var(--brand-ink),var(--brand-2));color:#fff;box-shadow:var(--sh-sm)}
.btn.primary:hover{transform:translateY(-1px);box-shadow:var(--sh)}
.btn.go{background:linear-gradient(135deg,var(--up),#22c55e);color:#fff;box-shadow:var(--sh-sm)}
.btn.ghost{background:#fff;border:1px solid var(--line);color:var(--ink-soft)}
.btn.ghost:hover{border-color:var(--brand-2);color:var(--brand-ink)}
.btn.sm{padding:7px 13px;font-size:13px;border-radius:8px}
.btn.block{width:100%}

/* ---- search ---- */
.search{display:flex;align-items:center;gap:10px;background:#fff;border:1.5px solid var(--line);border-radius:12px;padding:6px 6px 6px 16px;box-shadow:var(--sh-sm)}
.search:focus-within{border-color:var(--brand-2)}
.search input{flex:1;border:none;outline:none;font-size:16px;font-family:inherit;color:var(--ink);background:transparent;padding:8px 0}
.search .ic{color:var(--muted);flex:none}

/* ---- STATUS pills / badges ---- */
.pill{display:inline-flex;align-items:center;gap:7px;font-size:13px;font-weight:700;border-radius:999px;padding:4px 12px;border:1px solid;line-height:1.3}
.pill .dot{width:8px;height:8px;border-radius:50%;flex:none}
.pill.up{background:var(--up-bg);border-color:var(--up-line);color:#15803d}
.pill.up .dot{background:var(--up);box-shadow:0 0 0 3px rgba(22,163,74,.18)}
.pill.deg{background:var(--deg-bg);border-color:var(--deg-line);color:#b45309}
.pill.deg .dot{background:var(--deg);box-shadow:0 0 0 3px rgba(217,119,6,.18)}
.pill.down{background:var(--down-bg);border-color:var(--down-line);color:#b91c1c}
.pill.down .dot{background:var(--down);box-shadow:0 0 0 3px rgba(220,38,38,.18)}
.pill.sm{font-size:11.5px;padding:3px 9px}
.pill .dot.live{animation:pulse 1.6s infinite}
@keyframes pulse{0%{opacity:1}50%{opacity:.35}100%{opacity:1}}

/* big hero status banner */
.bigstatus{border-radius:var(--radius);padding:26px 24px;display:flex;align-items:center;gap:20px;border:1px solid}
.bigstatus.up{background:linear-gradient(135deg,var(--up-bg),#fff);border-color:var(--up-line)}
.bigstatus.deg{background:linear-gradient(135deg,var(--deg-bg),#fff);border-color:var(--deg-line)}
.bigstatus.down{background:linear-gradient(135deg,var(--down-bg),#fff);border-color:var(--down-line)}
.bigstatus .ring{width:62px;height:62px;border-radius:50%;flex:none;display:flex;align-items:center;justify-content:center;font-size:30px;color:#fff}
.bigstatus.up .ring{background:linear-gradient(135deg,var(--up),#22c55e)}
.bigstatus.deg .ring{background:linear-gradient(135deg,var(--deg),#f59e0b)}
.bigstatus.down .ring{background:linear-gradient(135deg,var(--down),#ef4444)}
.bigstatus .txt h2{margin:0;font-size:24px;letter-spacing:-.01em}
.bigstatus.up .txt h2{color:#15803d}.bigstatus.deg .txt h2{color:#b45309}.bigstatus.down .txt h2{color:#b91c1c}
.bigstatus .txt p{margin:3px 0 0;font-size:13.5px;color:var(--ink-soft)}

/* ---- uptime 90-day bars ---- */
.uptime{display:flex;gap:2px;align-items:flex-end;height:34px}
.uptime i{flex:1;min-width:2px;border-radius:2px;background:var(--up);height:100%;opacity:.92}
.uptime i.deg{background:var(--deg)}
.uptime i.down{background:var(--down)}
.uptime i.na{background:var(--line)}
.uptime.sm{height:22px;gap:1.5px}
.uptime-legend{display:flex;justify-content:space-between;font-size:11.5px;color:var(--muted);margin-top:6px}

/* ---- latency sparkline (svg) ---- */
.spark{width:100%;height:64px;display:block}
.spark-fill{fill:rgba(37,99,235,.10)}
.spark-line{fill:none;stroke:var(--brand-2);stroke-width:2;stroke-linejoin:round;stroke-linecap:round}

/* ---- crowd report bar chart ---- */
.crowd{display:flex;gap:3px;align-items:flex-end;height:90px}
.crowd i{flex:1;background:linear-gradient(180deg,#93c5fd,#3b82f6);border-radius:3px 3px 0 0;min-height:2px}
.crowd i.spike{background:linear-gradient(180deg,#fca5a5,var(--down))}

/* ---- sections ---- */
section.blk{padding:36px 0}
.eyebrow{font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--brand);font-weight:800}
.h2{font-size:24px;margin:6px 0 4px;letter-spacing:-.01em}
.lead{color:var(--ink-soft);font-size:15px;margin:0 0 16px}
.center{text-align:center}
.muted{color:var(--muted)}

/* ---- grid & cards ---- */
.grid{display:grid;gap:14px}
.g2{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:repeat(3,1fr)}.g4{grid-template-columns:repeat(4,1fr)}
@media(max-width:880px){.g3,.g4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.g2,.g3,.g4{grid-template-columns:1fr}}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px;box-shadow:var(--sh-sm)}
.card.hover{transition:transform .12s,box-shadow .12s,border-color .12s;display:block;color:inherit}
.card.hover:hover{transform:translateY(-3px);box-shadow:var(--sh);border-color:var(--brand-2)}
.card h3{margin:0 0 6px;font-size:16px}
.card p{margin:0;color:var(--ink-soft);font-size:14px}
.tile-ic{width:44px;height:44px;border-radius:12px;background:var(--bg-tint);display:flex;align-items:center;justify-content:center;font-size:22px;margin-bottom:10px}

/* service row / cell (logo + name + status) */
.srv{display:flex;align-items:center;gap:12px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);padding:12px 14px;transition:border-color .12s,box-shadow .12s;color:inherit}
a.srv:hover{border-color:var(--brand-2);box-shadow:var(--sh-sm)}
.srv .ic{width:38px;height:38px;border-radius:9px;background:var(--bg-tint);display:flex;align-items:center;justify-content:center;font-size:19px;flex:none;font-weight:800;color:var(--ink-soft)}
.srv .meta{flex:1;min-width:0}
.srv .meta b{display:block;font-size:14.5px;color:var(--ink)}
.srv .meta span{font-size:12px;color:var(--muted)}
.srv .end{text-align:right;flex:none}

.kpi{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
@media(max-width:680px){.kpi{grid-template-columns:repeat(2,1fr)}}
.kpi .k{background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);padding:13px 15px}
.kpi .k .lbl{font-size:11.5px;color:var(--muted);font-weight:700;text-transform:uppercase;letter-spacing:.04em}
.kpi .k .v{font-size:22px;font-weight:800;line-height:1.15;margin-top:3px;letter-spacing:-.02em}
.kpi .k .v small{font-size:12px;color:var(--muted);font-weight:600}

/* ---- tags ---- */
.tag{display:inline-block;font-size:11px;font-weight:700;padding:2px 9px;border-radius:999px;letter-spacing:.02em}
.tag.brand{background:#e7eefe;color:var(--brand-ink)}
.tag.up{background:var(--up-bg);color:#15803d}
.tag.deg{background:var(--deg-bg);color:#b45309}
.tag.down{background:var(--down-bg);color:#b91c1c}

/* ---- chips / filters ---- */
.chips{display:flex;gap:8px;flex-wrap:wrap}
.chip{font-size:13px;background:#fff;border:1px solid var(--line);border-radius:999px;padding:6px 13px;color:var(--ink-soft);font-weight:600;cursor:pointer}
.chip:hover{border-color:var(--brand-2);color:var(--brand-ink)}
.chip.sel{background:var(--brand-ink);border-color:var(--brand-ink);color:#fff}

/* ---- trust / official block ---- */
.trust{display:flex;align-items:flex-start;gap:12px;background:var(--up-bg);border:1px solid var(--up-line);border-radius:var(--radius-sm);padding:14px 16px;font-size:13.5px;color:#166534}
.trust .ic{font-size:20px;flex:none}
.official{background:var(--bg-tint);border:1px solid var(--line);border-radius:var(--radius-sm);padding:14px 16px}
.official .hd{display:flex;align-items:center;gap:8px;font-size:13px;font-weight:700;color:var(--ink-soft);margin-bottom:8px}
.official .src{display:flex;align-items:center;gap:9px;font-size:13px;padding:6px 0;border-top:1px dashed var(--line)}

/* ---- table ---- */
.tbl{width:100%;border-collapse:collapse;font-size:13.5px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.tbl th{background:var(--bg-tint);color:var(--ink-soft);text-align:left;padding:10px 13px;font-weight:700;font-size:12.5px}
.tbl td{padding:10px 13px;border-top:1px solid var(--line-2);vertical-align:top}
.tbl tr:nth-child(even) td{background:var(--bg-soft)}

/* severity badge */
.sev{font-size:11px;font-weight:800;padding:2px 8px;border-radius:6px;text-transform:uppercase;letter-spacing:.03em}
.sev.major{background:var(--down-bg);color:#b91c1c}
.sev.minor{background:var(--deg-bg);color:#b45309}
.sev.maint{background:#e7eefe;color:var(--brand-ink)}
.sev.resolved{background:var(--up-bg);color:#15803d}

/* ---- incident timeline ---- */
.timeline{position:relative;margin:8px 0 0;padding-left:22px}
.timeline::before{content:"";position:absolute;left:6px;top:6px;bottom:6px;width:2px;background:var(--line)}
.tl{position:relative;padding:0 0 18px 4px}
.tl::before{content:"";position:absolute;left:-19px;top:5px;width:10px;height:10px;border-radius:50%;background:#fff;border:2px solid var(--brand-2)}
.tl.down::before{border-color:var(--down)}.tl.deg::before{border-color:var(--deg)}.tl.up::before{border-color:var(--up)}
.tl time{font-size:11.5px;color:var(--muted);font-weight:700}
.tl b{display:block;font-size:14px;margin:2px 0}
.tl p{margin:0;font-size:13px;color:var(--ink-soft)}

/* ---- AI summary block ---- */
.ai{background:linear-gradient(135deg,#f5f3ff,#fff);border:1px solid #ddd6fe;border-radius:var(--radius-sm);padding:13px 15px;font-size:13.5px;color:#4c1d95}
.ai .hd{display:flex;align-items:center;gap:7px;font-weight:800;font-size:12px;text-transform:uppercase;letter-spacing:.04em;color:#6d28d9;margin-bottom:6px}

/* ---- FAQ ---- */
.faq details{border:1px solid var(--line);border-radius:var(--radius-sm);padding:12px 16px;margin-bottom:10px;background:#fff}
.faq summary{font-weight:700;cursor:pointer;font-size:14.5px;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";float:right;color:var(--muted);font-weight:800}
.faq details[open] summary::after{content:"–"}
.faq p{margin:10px 0 0;font-size:13.5px;color:var(--ink-soft)}

/* ---- code / embed ---- */
pre.code{background:var(--bg-deep);color:#e2e8f0;border-radius:var(--radius-sm);padding:15px 16px;overflow:auto;font-family:var(--mono);font-size:12.5px;line-height:1.6;margin:0}
pre.code .t{color:#7dd3fc}.code .s{color:#fca5a5}.code .c{color:#64748b}.code .a{color:#fcd34d}

/* embeddable widget mock */
.widget{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 16px;box-shadow:var(--sh-sm);max-width:340px}
.widget.dark{background:#0f172a;border-color:#1e293b;color:#e2e8f0}
.widget .wtop{display:flex;align-items:center;justify-content:space-between;gap:10px}
.widget .wname{font-weight:800;font-size:14.5px}
.widget .wfoot{margin-top:10px;font-size:10.5px;color:var(--muted);text-align:right}
.widget.dark .wfoot{color:#64748b}
.widget .wfoot a{color:var(--brand-2);font-weight:700}

/* ---- form ---- */
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;font-weight:700;color:var(--ink-soft);margin-bottom:7px}
.field select,.field input,.field textarea{width:100%;border:1.5px solid var(--line);border-radius:var(--radius-sm);padding:11px 13px;font-size:14.5px;font-family:inherit;color:var(--ink);background:#fff;outline:none}
.field select:focus,.field input:focus,.field textarea:focus{border-color:var(--brand-2)}
.pickgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:9px}
@media(max-width:560px){.pickgrid{grid-template-columns:repeat(2,1fr)}}
.pick{border:1.5px solid var(--line);background:#fff;border-radius:var(--radius-sm);padding:13px 10px;text-align:center;cursor:pointer;font-size:13px;font-weight:700;color:var(--ink-soft)}
.pick:hover{border-color:var(--brand-2)}
.pick.sel{border-color:var(--down);background:var(--down-bg);color:#b91c1c}
.pick .e{display:block;font-size:22px;margin-bottom:5px}

/* ---- upsell / affiliate ---- */
.upsell{background:linear-gradient(135deg,#0f172a,#1e293b);color:#e2e8f0;border-radius:var(--radius);padding:18px 20px;display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.upsell .txt{flex:1;min-width:200px}
.upsell h4{margin:0 0 4px;font-size:16px;color:#fff}
.upsell p{margin:0;font-size:13px;color:#94a3b8}
.aff-note{font-size:11px;color:var(--muted);font-style:italic}

/* ---- disclaimer ---- */
.disc{background:var(--deg-bg);border:1px solid var(--deg-line);border-radius:var(--radius-sm);padding:10px 14px;font-size:12px;color:#92520a;margin:14px 0}

/* ---- breadcrumb ---- */
.crumb{font-size:13px;color:var(--muted);padding:14px 0 0}
.crumb a{color:var(--muted)}.crumb a:hover{color:var(--brand)}

/* ---- footer ---- */
.foot{background:#fff;border-top:1px solid var(--line);margin-top:30px}
.foot .inner{padding:28px 0;display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:20px}
@media(max-width:760px){.foot .inner{grid-template-columns:1fr 1fr}}
.foot h5{font-size:11.5px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin:0 0 10px}
.foot a{display:block;color:var(--ink-soft);font-size:13.5px;padding:3px 0}
.foot .legal{border-top:1px solid var(--line);padding:14px 0;font-size:11.5px;color:var(--muted)}

/* ---- hero ---- */
.hero{background:radial-gradient(820px 360px at 18% -10%,rgba(37,99,235,.10),transparent 60%),radial-gradient(620px 300px at 92% 0,rgba(22,163,74,.10),transparent 55%),linear-gradient(180deg,#fff,var(--bg-soft));border-bottom:1px solid var(--line)}
.hero .inner{padding:52px 0 40px;text-align:center}
.hero h1{font-size:clamp(30px,5vw,46px);line-height:1.08;margin:0 0 12px;letter-spacing:-.025em}
.hero h1 .hl{background:linear-gradient(120deg,var(--brand-ink),var(--up));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero p.sub{font-size:17px;color:var(--ink-soft);max-width:600px;margin:0 auto 22px}
.hero .searchwrap{max-width:560px;margin:0 auto}

/* ---- prototype gallery (index) ---- */
.galhead{background:linear-gradient(135deg,#0b1220,#13294b);color:#fff;padding:44px 0}
.galhead h1{margin:0 0 10px;font-size:32px;letter-spacing:-.02em}
.galhead p{margin:0;max-width:700px;color:#cbd5e1;font-size:15.5px}
.galhead .chips{margin-top:16px;display:flex;gap:8px;flex-wrap:wrap}
.galhead .c{background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.20);border-radius:999px;padding:5px 13px;font-size:12.5px;font-weight:600;color:#e2e8f0}
.frame{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--sh-sm);transition:transform .12s,box-shadow .12s;display:block;color:inherit}
.frame:hover{transform:translateY(-4px);box-shadow:var(--sh)}
.frame .top{height:140px;background:linear-gradient(135deg,#0b1220,#1e3a5f);display:flex;align-items:center;justify-content:center;font-size:52px;border-bottom:1px solid var(--line);color:#fff}
.frame .cap{padding:14px 16px}
.frame .cap .n{font-size:11px;color:var(--brand);font-weight:800;letter-spacing:.06em}
.frame .cap h3{margin:3px 0 5px;font-size:16px}
.frame .cap p{margin:0;font-size:13px;color:var(--ink-soft)}

/* utils */
.row{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.between{justify-content:space-between}
.mt8{margin-top:8px}.mt12{margin-top:12px}.mt16{margin-top:16px}.mt24{margin-top:24px}
.mb0{margin-bottom:0}
.sec-title{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:0 0 12px}
.sec-title h3{margin:0;font-size:16px}
hr.sep{border:none;border-top:1px solid var(--line);margin:22px 0}