/* ============================================
   layout.css — 容器、网格、区块布局
   ============================================ */

/* --- 通用容器 --- */
.container {
  max-width: var(--space-container);
  margin: 0 auto;
  padding: var(--space-section) 24px;
}

/* --- 区块标题 --- */
.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-header .cn-label {
  display: inline-block;
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 0.8rem;
  font-weight: 400;
  letter-spacing: 6px;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: 12px;
}

.section-header h2 {
  font-size: 2.4rem;
  font-weight: 500;
  color: var(--color-ink-dark);
  letter-spacing: 4px;
  margin-bottom: 16px;
}

/* 标题下的金线装饰 */
.section-header .divider {
  display: block;
  width: 50px;
  height: 2px;
  background: var(--color-gold-light);
  margin: 0 auto;
  position: relative;
}

.section-header .divider::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: -3px;
  transform: translateX(-50%);
  width: 6px;
  height: 6px;
  background: var(--color-gold);
  border-radius: 50%;
}

/* --- 图文交错布局 (intro-grid) --- */
.intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.intro-grid.reverse {
  direction: rtl;
}

.intro-grid.reverse > * {
  direction: ltr;
}

.intro-text p {
  color: var(--color-text-secondary);
  font-size: 1.05rem;
}

.intro-text p b {
  color: var(--color-ink-dark);
  font-weight: 500;
}

/* --- 卡片网格 --- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 28px;
}

.card-grid.two-col {
  grid-template-columns: repeat(2, 1fr);
}

/* --- 交替背景区块 --- */
.section-alt {
  background-color: var(--color-paper-dark);
}

/* --- 时间轴区块 --- */
.timeline-wrapper {
  max-width: 760px;
  margin: 0 auto;
  position: relative;
}

/* --- 页脚 --- */
.site-footer {
  background-color: var(--color-ink-dark);
  color: rgba(255, 255, 255, 0.75);
  text-align: center;
  padding: 48px 20px;
  font-size: 0.9rem;
  letter-spacing: 2px;
  font-weight: 300;
}

.site-footer .footer-brand {
  font-family: 'Noto Serif SC', serif;
  font-size: 1.1rem;
  color: var(--color-gold-light);
  margin-bottom: 8px;
  font-weight: 500;
}