/* ===== base.css — 重置 + 设计变量 + 基础布局 ===== */
:root {
  --bg: #0d1117;
  --bg-soft: #161b22;
  --bg-card: #1a212b;
  --border: #2a323d;
  --text: #e6edf3;
  --text-dim: #9aa7b4;
  --accent: #2f81f7;
  --accent-2: #3fb950;
  --radius: 14px;
  --maxw: 1180px;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
  font-size: 16px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

img { max-width: 100%; display: block; }

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 32px 20px 64px;
}

.footer {
  border-top: 1px solid var(--border);
  padding: 28px 20px;
  text-align: center;
  color: var(--text-dim);
  font-size: 0.85rem;
}

.empty {
  color: var(--text-dim);
  padding: 40px 0;
  text-align: center;
  grid-column: 1 / -1;
}