/* =========================================================
   布局：容器、栅格、Section 间距 · 宋体高级版
   ========================================================= */

body {
  background-color: var(--color-bg-primary);
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

.section {
  position: relative;
  padding-top: var(--space-4xl);
  padding-bottom: var(--space-4xl);
}

.section--secondary {
  background-color: var(--color-bg-secondary);
}

.section--gradient {
  background: linear-gradient(180deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 100%);
}

.section--warm {
  background: linear-gradient(135deg, #FFF1ED 0%, #FAF8F5 50%, #EFF6FF 100%);
}

.section__header {
  text-align: center;
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: var(--space-3xl);
}

.section__tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-sans);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  letter-spacing: 0.14em;
  color: var(--color-accent);
  text-transform: uppercase;
  background: var(--color-accent-soft);
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-lg);
}

.section__tag::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--color-accent);
  border-radius: 50%;
}

.section__title {
  font-size: var(--font-size-3xl);
  color: var(--color-text-primary);
  margin-bottom: var(--space-md);
  font-weight: var(--font-weight-normal);
}

.section__desc {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  font-weight: var(--font-weight-light);
}

/* === 栅格 === */
.grid {
  display: grid;
  gap: var(--space-lg);
}

.grid--3 {
  grid-template-columns: 1fr;
}

.grid--2 {
  grid-template-columns: 1fr;
}

.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.items-center {
  align-items: center;
}

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}