/* ---- 页眉：设计书中标注暂留空位 ---- */
.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-line);
}

.header-inner {
  max-width: 1240px;
  margin: 0 auto;
  padding: var(--space-4) var(--space-5);
  min-height: 60px;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  column-gap: 52px;
}

.product-mark {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  justify-self: start;
}

.product-mark__name {
  color: var(--color-brand);
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.01em;
  text-decoration: none;
}

.product-mark__divider {
  width: 1px;
  height: 16px;
  background: var(--color-line-strong);
}

.product-mark__context,
.header-status {
  font-size: 13px;
  color: var(--color-ink-soft);
}

.header-tools {
  display: flex;
  align-items: center;
  justify-self: start;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.header-nav__link {
  color: var(--color-ink-soft);
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
}

.header-nav__link:hover,
.header-nav__link:focus-visible,
.header-nav__link.is-active {
  color: var(--color-brand);
}

.header-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding-left: var(--space-4);
  border-left: 1px solid var(--color-line);
  justify-self: end;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-positive);
}

/* ---- 主体 ---- */
.page {
  max-width: 1240px;
  margin: 0 auto;
  padding: 48px var(--space-5) 80px;
}

.intro {
  max-width: 720px;
  margin-bottom: var(--space-7);
}

.intro__title {
  font-family: var(--font-display);
  font-size: 38px;
  font-weight: 600;
  line-height: 1.16;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
}

.intro__desc {
  color: var(--color-ink-soft);
  font-size: 15px;
  line-height: 1.7;
}

.board {
  display: flex;
  flex-direction: column;
  gap: var(--space-7);
}

@media (max-width: 760px) {
  .header-inner { display: flex; min-height: 56px; padding: var(--space-3) var(--space-4); }
  .header-inner .product-mark__context,
  .header-inner .header-status { display: none !important; }
  .header-inner .header-tools { display: flex; margin-left: auto; }
  .header-nav { gap: var(--space-3); }
  .header-nav__link { display: inline-flex; align-items: center; min-height: 44px; font-size: 12px; }
  .page { padding: var(--space-6) var(--space-4) 56px; }
  .intro { margin-bottom: var(--space-6); }
  .intro__title { font-size: 29px; line-height: 1.25; }
  .intro__desc { font-size: 14px; }
}