/* 随心笔记 —— 全局样式（无外部资源，系统字体，移动端自适应） */
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: #333; background: #fafaf8; line-height: 1.75; font-size: 16px;
}
a { color: #2f6f4f; text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: 760px; margin: 0 auto; padding: 0 20px; }
header { background: #fff; border-bottom: 1px solid #eee; }
.nav { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; padding: 14px 0; }
.brand { font-weight: 700; font-size: 18px; color: #2f6f4f; }
.nav-links { display: flex; flex-wrap: wrap; gap: 18px; font-size: 15px; }
.nav-links a.active { color: #1d4e35; font-weight: 600; }
main { padding: 32px 0 48px; }
.hero { text-align: center; padding: 36px 0 24px; }
.hero h1 { font-size: 30px; color: #2f6f4f; margin-bottom: 10px; }
.hero p { color: #777; font-size: 15px; }
.card-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 16px; margin: 20px 0; }
.card { background: #fff; border: 1px solid #eee; border-radius: 10px; padding: 18px; }
.card h3 { font-size: 16px; margin-bottom: 8px; }
.card .meta { font-size: 13px; color: #999; }
.card p { font-size: 14px; color: #666; margin-top: 6px; }
article { background: #fff; border: 1px solid #eee; border-radius: 10px; padding: 28px; }
article h1 { font-size: 24px; color: #2f6f4f; margin-bottom: 6px; }
article .meta { font-size: 13px; color: #999; margin-bottom: 20px; padding-bottom: 14px; border-bottom: 1px solid #f0f0f0; }
article h2 { font-size: 19px; margin: 22px 0 10px; color: #444; }
article p { margin-bottom: 14px; text-align: justify; }
.note-item { display: block; background: #fff; border: 1px solid #eee; border-radius: 10px; padding: 16px 18px; margin-bottom: 12px; }
.note-item h3 { font-size: 16px; margin-bottom: 4px; }
.note-item .meta { font-size: 13px; color: #999; }
footer { border-top: 1px solid #eee; background: #fff; padding: 20px 0; margin-top: 24px; font-size: 13px; color: #999; }
footer .nav-links { margin-top: 8px; gap: 14px; font-size: 13px; }
.contact li { list-style: none; margin-bottom: 8px; }
@media (max-width: 560px) {
  body { font-size: 15px; }
  .hero h1 { font-size: 25px; }
  article { padding: 20px; }
}