/* ============================================================
   layout.css — 容器、栅格、响应式
   ============================================================ */

/* 顶部刊号条 */
.issue-bar {
  border-bottom: 1px solid var(--line);
  background: var(--paper-2);
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 12px;
  color: var(--ink-soft);
  letter-spacing: 0.06em;
}
.issue-bar .wrap {
  display: flex; justify-content: space-between; align-items: center;
  padding: 8px 0; gap: 16px; flex-wrap: wrap;
}
.issue-bar .issue-no { color: var(--accent); font-weight: 700; }

/* 通用 section */
.section { padding: 64px 0; position: relative; }
.section + .section { border-top: 1px dashed var(--line); }

.section-title {
  display: flex; align-items: flex-end; justify-content: space-between;
  gap: 24px; margin-bottom: 28px; flex-wrap: wrap;
}
.section-title h2 { position: relative; padding-bottom: 12px; }
.section-title h2::after {
  content: ""; position: absolute; left: 0; bottom: 0;
  width: 56px; height: 3px; background: var(--accent);
}
.section-title .sub { max-width: 640px; }

/* Hero 栅格 */
.hero-grid {
  display: grid; grid-template-columns: 1.15fr .85fr; gap: 28px; align-items: stretch;
}

/* split 栅格 */
.split {
  display: grid; grid-template-columns: .92fr 1.08fr; gap: 32px; align-items: start;
}

/* 3 列网格（议题） */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }

@media (max-width: 980px) {
  .hero-grid, .split { grid-template-columns: 1fr; }
  .grid-3, .grid-4 { grid-template-columns: 1fr 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .section { padding: 44px 0; }
}

@media (max-width: 560px) {
  :root { --wrap-pad: 22px; }
  .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .section { padding: 32px 0; }
  .section-title { flex-direction: column; align-items: flex-start; }
}