/* App 内 WebView 教程 / FAQ 共用：品牌色与顶栏 Logo */

:root {
  --app-brand: #4a7dff;
  --app-brand-dark: #3568f0;
  --app-text: #1a1a1a;
  --app-text-muted: #6c757d;
}

.app-header {
  display: flex;
  align-items: center;
  gap: 12px;
  max-width: 640px;
  margin: 0 auto;
  padding: 16px 20px 8px;
}

.app-logo {
  width: 44px;
  height: 44px;
  border-radius: 11px;
  flex-shrink: 0;
  box-shadow: 0 4px 14px rgba(74, 125, 255, 0.28);
}

.app-brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.app-brand-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--app-text);
  letter-spacing: -0.02em;
}

.app-brand-sub {
  font-size: 0.8rem;
  color: var(--app-text-muted);
}

/* 与顶栏衔接：收紧文章顶部留白 */
.app-header + .tutorial,
.app-header + .faq-page {
  padding-top: 12px;
}

.tutorial h2 .step,
.faq-page h2 .step {
  background: var(--app-brand);
}

.tutorial .tip,
.faq-page .tip {
  border-left-color: var(--app-brand);
}

.tutorial a,
.faq-page a {
  color: var(--app-brand-dark);
}