/* 说明书页（后台生成） */
:root {
  --ui-bg: #f4f5f3;
  --ui-card: #ffffff;
  --ui-text: #1a1c1a;
  --ui-muted: #6b726c;
  --ui-line: #e4e7e3;
  --ui-brand: #129a4b;
  --ui-brand-dark: #0b6b33;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--ui-bg);
  color: var(--ui-text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 15px;
  line-height: 1.6;
}

.docbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  height: 48px;
  padding: 0 16px;
  background: rgba(255, 255, 255, .92);
  border-bottom: 1px solid var(--ui-line);
  backdrop-filter: saturate(180%) blur(8px);
  font-size: 14px;
}

.docbar__back {
  color: var(--ui-brand-dark);
  text-decoration: none;
  white-space: nowrap;
  padding: 4px 10px;
  border: 1px solid var(--ui-line);
  border-radius: 999px;
  background: #fff;
}

.docbar__back:hover { border-color: var(--ui-brand); color: var(--ui-brand); }

.docbar__model {
  font-weight: 600;
  letter-spacing: .02em;
  white-space: nowrap;
}

.docbar__name {
  color: var(--ui-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 13px;
}

.manual {
  max-width: 820px;
  margin: 0 auto;
  background: #fff;
  box-shadow: 0 1px 2px rgba(20, 30, 20, .05);
  font-size: 0;
  line-height: 0;
}

.manual img {
  display: block;
  width: 100%;
  height: auto;
}

.docfoot {
  max-width: 820px;
  margin: 0 auto;
  padding: 20px 16px 40px;
  color: var(--ui-muted);
  font-size: 12px;
  text-align: center;
}

.docfoot a { color: var(--ui-muted); }

@media (max-width: 640px) {
  .manual { box-shadow: none; }
  .docbar { height: 44px; padding: 0 10px; gap: 8px; }
  .docbar__name { display: none; }
}

@media print {
  .docbar, .docfoot { display: none; }
  body { background: #fff; }
  .manual { box-shadow: none; max-width: none; }
}