/* 工具棚 · Shed —— 全站样式，单文件，无依赖 */
:root {
  color-scheme: light dark;
  --bg: #fbfbfd;
  --fg: #16181d;
  --dim: #6b7280;
  --line: #e6e8ee;
  --card: #ffffff;
  --accent: #4f8cff;
  --accent-soft: rgba(79, 140, 255, 0.1);
  --radius: 16px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1116;
    --fg: #e8eaed;
    --dim: #9aa2ae;
    --line: #23262f;
    --card: #161920;
    --accent: #6a9dff;
    --accent-soft: rgba(106, 157, 255, 0.14);
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.75 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: 760px; margin: 0 auto; padding: 0 24px; }

/* 顶部 */
.site-header { padding: 28px 0 8px; }
.site-header .wrap { display: flex; align-items: center; gap: 14px; }
.site-header a.brand {
  display: inline-flex; align-items: center; gap: 10px;
  color: var(--fg); text-decoration: none; font-weight: 600; letter-spacing: 0.3px;
}
.site-header img { width: 30px; height: 30px; border-radius: 8px; }
.site-header nav { margin-left: auto; display: flex; gap: 18px; }
.site-header nav a { color: var(--dim); text-decoration: none; font-size: 14px; }
.site-header nav a:hover { color: var(--fg); }

/* 首屏 */
.hero { padding: 56px 0 32px; }
.hero h1 { font-size: 40px; line-height: 1.2; margin: 0 0 12px; letter-spacing: -0.5px; }
.hero p { margin: 0; color: var(--dim); font-size: 17px; max-width: 34em; }

/* 卡片 */
.grid { display: grid; gap: 14px; padding-bottom: 56px; }
.card {
  display: flex; gap: 16px; align-items: flex-start;
  padding: 20px; border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--card); text-decoration: none; color: inherit;
  transition: border-color 0.15s, transform 0.15s;
}
a.card:hover { border-color: var(--accent); transform: translateY(-1px); }
.card img { width: 48px; height: 48px; border-radius: 12px; flex: 0 0 auto; }
.card h2 { margin: 0 0 4px; font-size: 17px; }
.card p { margin: 0; font-size: 14px; color: var(--dim); line-height: 1.65; }
.card .more { display: inline-block; margin-top: 10px; font-size: 13.5px; color: var(--accent); }
.card.muted { color: var(--dim); font-size: 14px; border-style: dashed; background: transparent; }

/* 文章（隐私政策等） */
article { padding: 24px 0 72px; }
article h1 { font-size: 30px; line-height: 1.3; margin: 0 0 8px; letter-spacing: -0.3px; }
article .meta { color: var(--dim); font-size: 13.5px; margin-bottom: 32px; }
article h2 { font-size: 18px; margin: 36px 0 12px; }
article h3 { font-size: 15.5px; margin: 24px 0 8px; }
article p, article li { font-size: 15.5px; }
article ul { padding-left: 1.3em; }
article li { margin: 6px 0; }
article a { color: var(--accent); }
article code {
  font-size: 0.9em; background: var(--accent-soft); padding: 1px 6px; border-radius: 5px;
}
article table { width: 100%; border-collapse: collapse; margin: 18px 0; font-size: 14.5px; }
article th, article td { text-align: left; padding: 9px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
article th { color: var(--dim); font-weight: 500; white-space: nowrap; }
article blockquote {
  margin: 20px 0; padding: 12px 18px; border-left: 3px solid var(--accent);
  background: var(--accent-soft); border-radius: 0 10px 10px 0; color: var(--dim);
}
article blockquote p { margin: 0; }

.back { display: inline-block; margin-bottom: 24px; font-size: 14px; color: var(--dim); text-decoration: none; }
.back:hover { color: var(--accent); }

footer {
  border-top: 1px solid var(--line); padding: 24px 0 40px;
  color: var(--dim); font-size: 13px;
}
footer .wrap { display: flex; flex-wrap: wrap; gap: 8px 20px; }
footer a { color: var(--dim); text-decoration: none; }
footer a:hover { color: var(--fg); }

@media (max-width: 560px) {
  .hero h1 { font-size: 32px; }
  .site-header nav { display: none; }
}