/* ===== 基础 ===== */
* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: #f5f7fa;
  color: #1f2937;
  font-family: system-ui, -apple-system, BlinkMacSystemFont,
               "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
}

/* ===== 布局 ===== */
.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 40px 24px;
}

/* ===== 头部 ===== */
.site-header {
  margin-bottom: 40px;
}

.site-header h1 {
  margin: 0;
  font-size: 2.2rem;
}

.site-header p {
  margin-top: 8px;
  color: #6b7280;
}

/* ===== 主体网格 ===== */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

/* ===== 卡片 ===== */
.card {
  background: #ffffff;
  border-radius: 10px;
  padding: 20px 22px;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.05);
}

.card h2 {
  margin-top: 0;
  margin-bottom: 12px;
  font-size: 1.3rem;
  border-left: 4px solid #3b82f6;
  padding-left: 10px;
}

/* ===== 链接列表 ===== */
.link-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.link-list li + li {
  margin-top: 8px;
}

.link-list a {
  display: block;
  padding: 8px 10px;
  border-radius: 6px;
  color: #1f2937;
  text-decoration: none;
  transition: background 0.15s ease;
}

.link-list a:hover {
  background: #eef2ff;
}

/* ===== 页脚 ===== */
.site-footer {
  margin-top: 50px;
  font-size: 0.9rem;
  color: #9ca3af;
  text-align: center;
}