* { box-sizing: border-box; }
    body {
        font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
        line-height: 1.75; color: #333; max-width: 720px; margin: 0 auto;
        padding: 32px 20px 48px; background: #fff;
    }
    a { color: #0b57d0; text-decoration: none; }
    h1 { font-size: 1.6rem; margin: 0 0 8px; }
    .meta { color: #888; font-size: .9rem; margin-bottom: 28px; }
    h2 { font-size: 1.15rem; margin: 28px 0 10px; padding-left: 10px; border-left: 4px solid #ffca18; }
    p, li { font-size: .98rem; color: #444; }
    ul { padding-left: 1.2em; }
    li { margin-bottom: 6px; }
    footer { margin-top: 40px; padding-top: 16px; border-top: 1px solid #eee; color: #999; font-size: .85rem; }