:root {
  --bg: #f5f6f8;
  --card: #ffffff;
  --border: #e5e7eb;
  --text: #1f2937;
  --muted: #6b7280;
  --ios: #0a84ff;
  --android: #3ddc84;
  --mac: #1d1d1f;
  --win: #0078d4;
  --shadow: 0 2px 10px rgba(0,0,0,.05);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
}

.site-header {
  padding: 28px 20px 12px;
  text-align: center;
}
.site-header h1 {
  margin: 0;
  font-size: 22px;
  font-weight: 600;
}
.meta {
  margin: 6px 0 0;
  font-size: 12px;
  color: var(--muted);
}

.app-list {
  max-width: 760px;
  margin: 0 auto;
  padding: 16px 14px 60px;
  display: grid;
  gap: 14px;
}

.empty {
  padding: 40px 20px;
  text-align: center;
  color: var(--muted);
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px;
  box-shadow: var(--shadow);
}

.card-head {
  display: flex;
  align-items: center;
  gap: 12px;
}
.icon {
  width: 56px;
  height: 56px;
  border-radius: 13px;
  background: #e5e7eb;
  flex-shrink: 0;
  object-fit: cover;
}
.icon-fallback {
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  color: var(--muted);
  font-size: 20px;
}
.title-wrap { flex: 1; min-width: 0; }
.app-name {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.bundle-id {
  margin: 2px 0 0;
  font-size: 12px;
  color: var(--muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.platforms {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 12px;
}
.btn-group {
  display: flex;
  gap: 6px;
  min-width: 0;
}
/* 奇数个按钮时最后一个独占整行,避免右边留空 */
.btn-group:last-child:nth-child(odd) {
  grid-column: span 2;
}
.btn {
  appearance: none;
  border: none;
  border-radius: 10px;
  padding: 8px 12px;
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  cursor: pointer;
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  text-decoration: none;
  line-height: 1.25;
}
.btn-ios { background: var(--ios); }
.btn-android { background: var(--android); color: #0b2a14; }
.btn-mac { background: var(--mac); }
.btn-win { background: var(--win); }
.btn .btn-label { font-size: 14px; }
.btn small,
.btn .btn-meta {
  font-weight: 400;
  opacity: .85;
  font-size: 11px;
  line-height: 1.35;
  text-align: center;
}
.btn .btn-bundle {
  width: 100%;
  margin-top: 4px;
  padding-top: 4px;
  border-top: 1px solid rgba(255, 255, 255, .24);
  font-size: 10px;
  line-height: 1.25;
  font-weight: 500;
  opacity: .78;
  overflow-wrap: anywhere;
}
.btn-android .btn-bundle {
  border-top-color: rgba(11, 42, 20, .18);
}
.btn-qr {
  appearance: none;
  border: none;
  border-radius: 10px;
  width: 42px;
  flex-shrink: 0;
  align-self: stretch;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: #fff;
}
.btn-qr-ios { background: var(--ios); }
.btn-qr-android { background: var(--android); color: #0b2a14; }
.btn-qr-mac { background: var(--mac); }
.btn-qr-win { background: var(--win); }
.btn-qr:hover { opacity: .9; }

.history-toggle {
  margin-top: 10px;
  font-size: 13px;
  color: var(--muted);
  background: none;
  border: none;
  padding: 6px 0;
  cursor: pointer;
}
.history {
  margin-top: 6px;
  border-top: 1px solid var(--border);
  padding-top: 8px;
}
.history-group h4 {
  margin: 8px 0 4px;
  font-size: 12px;
  color: var(--muted);
  font-weight: 600;
}
.history-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 0;
  font-size: 13px;
}
.history-item .ver { font-weight: 600; }
.history-item .when { color: var(--muted); flex: 1; font-size: 12px; }
.history-item a { color: var(--ios); text-decoration: none; }
.history-qr {
  appearance: none;
  border: none;
  background: transparent;
  color: var(--muted);
  padding: 2px 4px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
}
.history-qr svg { width: 16px; height: 16px; }
.history-qr:hover { color: var(--ios); }

.modal {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
}
.modal[hidden] { display: none; }
.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,.5);
}
.modal-panel {
  position: relative;
  background: #fff;
  padding: 16px;
  border-radius: 14px;
  max-width: 240px;
  width: calc(100% - 32px);
  text-align: center;
  box-shadow: 0 10px 40px rgba(0,0,0,.2);
}
.modal-panel h3 {
  margin: 0 0 12px;
  font-size: 16px;
}
#qr-canvas {
  display: flex;
  justify-content: center;
  margin: 10px 0;
}
#qr-canvas canvas { max-width: 100%; height: auto; }
.hint {
  color: var(--muted);
  font-size: 12px;
  margin: 10px 0 0;
}
.btn-close {
  margin-top: 14px;
  appearance: none;
  border: 1px solid var(--border);
  background: #fff;
  padding: 8px 14px;
  border-radius: 8px;
  cursor: pointer;
}

.site-footer {
  text-align: center;
  color: var(--muted);
  font-size: 12px;
  padding: 20px;
}