:root {
  --bg: #0b1220;
  --surface: #111827;
  --text: #e5e7eb;
  --muted: #94a3b8;
  --line: #334155;
  --accent: #fb923c;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px 16px 40px;
}
main {
  width: min(420px, 100%);
  text-align: center;
}
.logo {
  width: 64px;
  height: 64px;
  border-radius: 14px;
}
h1 {
  margin: 12px 0 6px;
  font-size: 28px;
  letter-spacing: 0.04em;
}
.tagline, .lead, .foot, #pkg-status, #wx-hint {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.5;
}
.lead { margin: 14px 0 8px; }
#download-qr {
  width: 220px;
  height: 220px;
  margin: 18px auto 0;
  padding: 12px;
  background: #fff;
  border-radius: 12px;
}
#download-qr img, #download-qr canvas, #download-qr table {
  width: 196px !important;
  height: 196px !important;
}
.url {
  word-break: break-all;
  font-size: 13px;
  color: var(--text);
  margin: 8px 0 12px;
}
button, #btn-download {
  display: inline-block;
  background: var(--accent);
  color: #111;
  border: 0;
  border-radius: 8px;
  padding: 10px 16px;
  font-weight: 650;
  font-size: 15px;
  text-decoration: none;
  cursor: pointer;
}
#btn-copy-url {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--line);
  margin-bottom: 12px;
}
#btn-download {
  display: block;
  margin: 0 auto 10px;
  width: min(280px, 100%);
}
#btn-download.is-disabled {
  pointer-events: none;
  opacity: 0.45;
}
#wx-hint {
  color: var(--accent);
  margin-top: 4px;
}
.foot { margin-top: 28px; font-size: 12px; }