/* 资料分享 - 全站样式 */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --ink: #1c1e21;
  --sub: #65676b;
  --muted: #8a8c90;
  --line: #e6e8eb;
  --bg: #f6f7f9;
  --card: #ffffff;
  --link: #2f6feb;
  --green: #0a7d38;
  --green-bg: #e6f4ea;
  --green-line: #c8e6d0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
               "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------- 首页 ---------- */
.home {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 18px;
  padding: 56px 20px 110px;
}
.home h1 { font-size: 30px; font-weight: 600; letter-spacing: .5px; }
.home .slogan { color: var(--sub); font-size: 15px; }

.banner {
  width: 100%;
  max-width: 620px;
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 8px 26px rgba(18, 38, 74, .12);
  margin-bottom: 6px;
}
.banner img { display: block; width: 100%; height: auto; }

.tag {
  display: inline-block;
  padding: 3px 12px;
  font-size: 12px;
  line-height: 1.8;
  color: var(--green);
  background: var(--green-bg);
  border: 1px solid var(--green-line);
  border-radius: 999px;
}

.notes {
  width: 100%;
  max-width: 620px;
  margin-top: 22px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.notes-title {
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 1px;
  text-align: left;
}
.note-card {
  display: block;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px 18px;
  color: inherit;
  transition: border-color .15s, transform .15s;
}
.note-card:hover { border-color: #c9d6ec; transform: translateY(-1px); text-decoration: none; }
.note-card h2 { font-size: 16px; font-weight: 600; margin-bottom: 4px; }
.note-card p { font-size: 13.5px; color: var(--sub); line-height: 1.7; }
.note-card .meta { font-size: 12px; color: var(--muted); margin-top: 8px; }

/* ---------- 文章页 ---------- */
.article { max-width: 720px; margin: 0 auto; padding: 32px 20px 64px; }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
  font-size: 13px;
}
.topbar .brand { color: var(--ink); font-weight: 600; }
.topbar .back { color: var(--muted); }

.article h1 { font-size: 26px; line-height: 1.5; margin: 26px 0 10px; }
.article .lead { color: var(--sub); font-size: 15px; }
.article .meta { color: var(--muted); font-size: 12.5px; margin: 14px 0 8px; }

.article h2 {
  font-size: 18px;
  margin: 34px 0 12px;
  padding-left: 11px;
  border-left: 3px solid var(--ink);
}
.article p { margin-bottom: 14px; }
.article ul { margin: 0 0 16px 22px; }
.article li { margin-bottom: 7px; }

.highlight {
  background: var(--card);
  border: 1px solid var(--line);
  border-left: 3px solid var(--green);
  border-radius: 8px;
  padding: 14px 16px;
  margin: 18px 0;
  font-size: 15px;
}
.highlight strong { color: var(--green); }

.sources {
  margin-top: 40px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px 20px;
}
.sources h2 { font-size: 14px; margin: 0 0 12px; padding: 0; border: 0; color: var(--sub); }
.sources ul { margin: 0 0 0 18px; }
.sources li { font-size: 14px; margin-bottom: 9px; }
.sources .src-meta { color: var(--muted); font-size: 12.5px; }

.notice {
  margin-top: 20px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.9;
  border-top: 1px dashed var(--line);
  padding-top: 16px;
}
.notice .ai-label {
  display: inline-block;
  font-size: 12px;
  color: var(--green);
  background: var(--green-bg);
  border: 1px solid var(--green-line);
  border-radius: 4px;
  padding: 1px 8px;
  margin-right: 8px;
}

/* ---------- 页脚 ---------- */
footer {
  margin-top: 40px;
  text-align: center;
  font-size: 12px;
  color: var(--muted);
}
footer a { color: var(--muted); }
footer a:hover { color: var(--ink); }