:root {
  --bg: #0f172a;
  --card: #1e293b;
  --card-2: #273449;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --ok: #34d399;
  --warn: #fbbf24;
  --err: #f87171;
  --radius: 14px;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}
.container { max-width: 1080px; margin: 0 auto; padding: 20px; }
.narrow { max-width: 560px; }
h1 { font-size: 22px; margin: 8px 0 4px; }
h2 { font-size: 16px; margin: 0 0 12px; color: var(--muted); font-weight: 500; }
.card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 18px;
  margin-bottom: 16px;
  border: 1px solid rgba(148, 163, 184, .12);
}
.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
input, select, button {
  font-size: 16px;
  border-radius: 10px;
  border: 1px solid rgba(148, 163, 184, .25);
  background: var(--card-2);
  color: var(--text);
  padding: 12px 14px;
}
input:focus, select:focus { outline: 2px solid var(--accent); border-color: transparent; }
button { cursor: pointer; font-weight: 600; border: none; }
button.primary { background: var(--accent); color: #06283a; }
button.ok { background: var(--ok); color: #052e1f; }
button.warn { background: var(--warn); color: #3a2a02; }
button.ghost { background: transparent; border: 1px solid rgba(148, 163, 184, .35); color: var(--text); }
button:disabled { opacity: .45; cursor: not-allowed; }
.big { width: 100%; padding: 16px; font-size: 18px; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid rgba(148, 163, 184, .12); vertical-align: top; }
th { color: var(--muted); font-weight: 600; white-space: nowrap; }
td.detail { font-family: ui-monospace, monospace; font-size: 12px; color: var(--muted); word-break: break-all; }
.tag { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 12px; font-weight: 600; }
.tag.info { background: rgba(56, 189, 248, .15); color: var(--accent); }
.tag.warn { background: rgba(251, 191, 36, .15); color: var(--warn); }
.tag.error { background: rgba(248, 113, 113, .18); color: var(--err); }
.tag.server { background: rgba(148, 163, 184, .15); color: var(--muted); }
.tag.pda { background: rgba(52, 211, 153, .15); color: var(--ok); }
.muted { color: var(--muted); font-size: 13px; }
.status { padding: 10px 14px; border-radius: 10px; margin-top: 10px; font-size: 14px; display: none; }
.status.show { display: block; }
.status.ok { background: rgba(52, 211, 153, .12); color: var(--ok); }
.status.err { background: rgba(248, 113, 113, .12); color: var(--err); }
.status.warn { background: rgba(251, 191, 36, .12); color: var(--warn); }
video, canvas.preview { width: 100%; border-radius: 10px; background: #000; }
.step { display: none; }
.step.active { display: block; }
.stepbar { display: flex; gap: 6px; margin-bottom: 14px; }
.stepbar div { flex: 1; height: 6px; border-radius: 3px; background: var(--card-2); }
.stepbar div.done { background: var(--accent); }
.choice { display: flex; gap: 12px; }
.choice button { flex: 1; padding: 22px 0; font-size: 20px; }
.summary { font-size: 15px; line-height: 1.9; }
.summary b { color: var(--accent); }
.pager { display: flex; gap: 8px; align-items: center; justify-content: flex-end; margin-top: 10px; }
a { color: var(--accent); }
.home-links { display: grid; gap: 14px; margin-top: 24px; }
.home-links a {
  display: block; background: var(--card); border-radius: var(--radius);
  padding: 22px; text-decoration: none; color: var(--text); font-size: 18px; font-weight: 600;
  border: 1px solid rgba(148, 163, 184, .12);
}
.home-links a span { display: block; font-size: 13px; color: var(--muted); font-weight: 400; margin-top: 6px; }