/* ============ 基础 ============ */
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
               "Microsoft YaHei", sans-serif;
  color: #24292f;
  background: #f6f8fa;
  line-height: 1.7;
}
a { color: #0969da; text-decoration: none; }
a:hover { text-decoration: underline; }
code { background: #eef1f4; padding: 2px 6px; border-radius: 4px; font-size: 0.9em; }
.empty { padding: 40px; text-align: center; color: #8c959f; }

/* ============ 文档阅读页（纯净、无导航） ============ */
.doc-page { background: #fff; }
.doc-container {
  max-width: 860px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}
.doc-header { border-bottom: 1px solid #e6e8eb; padding-bottom: 16px; margin-bottom: 24px; }
.doc-title { margin: 0 0 8px; font-size: 1.9em; line-height: 1.35; }
.doc-meta { display: flex; justify-content: space-between; align-items: center; color: #6e7781; font-size: 0.9em; }
.qrcode-btn {
  background: #0969da; color: #fff; border: 0; border-radius: 6px;
  padding: 6px 14px; cursor: pointer; font-size: 0.9em;
}
.qrcode-btn:hover { background: #0860c6; }

.markdown-body { font-size: 1.02em; }
.markdown-body h1, .markdown-body h2, .markdown-body h3 { margin-top: 1.6em; }
.markdown-body h2 { border-bottom: 1px solid #e6e8eb; padding-bottom: 6px; }
.markdown-body pre {
  background: #f6f8fa; padding: 16px; border-radius: 6px;
  overflow-x: auto; font-size: 0.92em;
}
.markdown-body pre code { background: transparent; padding: 0; }
.markdown-body table {
  border-collapse: collapse; width: 100%; margin: 16px 0;
}
.markdown-body th, .markdown-body td {
  border: 1px solid #d0d7de; padding: 8px 12px;
}
.markdown-body th { background: #f6f8fa; }
.markdown-body img { max-width: 100%; border-radius: 6px; }
.markdown-body blockquote {
  margin: 0; padding: 2px 16px; color: #6e7781;
  border-left: 4px solid #d0d7de;
}

/* 二维码弹窗 */
.qrmodal {
  display: none; position: fixed; inset: 0;
  background: rgba(0,0,0,0.5); z-index: 999;
  align-items: center; justify-content: center;
}
.qrmodal.show { display: flex; }
.qrmodal-box {
  background: #fff; padding: 28px; border-radius: 10px;
  text-align: center; max-width: 320px;
}
.qrmodal-box img { width: 220px; height: 220px; }
.qr-url { font-family: monospace; font-size: 0.9em; color: #6e7781; word-break: break-all; }
.qr-tip { font-size: 0.85em; color: #8c959f; }

/* ============ 首页（目录树） ============ */
.home-header {
  background: #fff; border-bottom: 1px solid #e6e8eb;
  padding: 20px 32px; display: flex; justify-content: space-between; align-items: center;
}
.home-brand h1 { margin: 0; font-size: 1.3em; }
.home-sub { margin: 4px 0 0; color: #6e7781; font-size: 0.88em; }
.home-search input {
  padding: 8px 12px; border: 1px solid #d0d7de; border-radius: 6px; width: 260px;
}
.home-search button {
  padding: 8px 16px; margin-left: 6px; background: #0969da; color: #fff;
  border: 0; border-radius: 6px; cursor: pointer;
}
.home-layout {
  max-width: 1200px; margin: 24px auto; padding: 0 24px;
  display: grid; grid-template-columns: 220px 1fr; gap: 24px;
}
.home-sidebar { background: #fff; border-radius: 8px; padding: 16px; }
.home-sidebar h3 { margin: 0 0 12px; font-size: 0.95em; color: #6e7781; }
.cat-list { list-style: none; padding: 0; margin: 0; }
.cat-list li { margin: 4px 0; }
.cat-list a { display: block; padding: 6px 8px; border-radius: 4px; color: #24292f; }
.cat-list a:hover { background: #f0f3f6; text-decoration: none; }
.cat-list a.active { background: #0969da; color: #fff; }
.cat-list ul { list-style: none; padding-left: 14px; margin: 4px 0; }

.doc-list { list-style: none; padding: 0; margin: 0; }
.doc-item {
  background: #fff; padding: 16px 20px; border-radius: 8px;
  margin-bottom: 10px; border: 1px solid #e6e8eb;
}
.doc-item-title { font-size: 1.08em; font-weight: 600; color: #24292f; }
.doc-item-title:hover { color: #0969da; }
.doc-item-meta { margin-top: 6px; font-size: 0.85em; color: #6e7781; display: flex; gap: 12px; align-items: center; }
.tag {
  background: #eef1f4; padding: 2px 8px; border-radius: 10px; font-size: 0.82em;
}
.home-footer { text-align: center; padding: 24px; color: #8c959f; font-size: 0.85em; }

/* ============ 后台 ============ */
.admin-nav {
  background: #24292f; color: #fff; padding: 0 24px;
  display: flex; justify-content: space-between; align-items: center; height: 52px;
}
.admin-brand { font-weight: 600; }
.admin-links a { color: #c9d1d9; margin-left: 18px; }
.admin-links a:hover { color: #fff; }
.admin-user { color: #8b949e; margin-left: 18px; font-size: 0.9em; }
.admin-main { max-width: 1100px; margin: 24px auto; padding: 0 24px; }

.panel-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }

.btn {
  display: inline-block; padding: 6px 14px; border-radius: 6px;
  background: #eef1f4; color: #24292f; border: 1px solid #d0d7de;
  cursor: pointer; font-size: 0.9em;
}
.btn:hover { background: #e2e6ea; text-decoration: none; }
.btn-primary { background: #0969da; color: #fff; border-color: #0969da; }
.btn-primary:hover { background: #0860c6; }
.btn-danger { background: #cf222e; color: #fff; border-color: #cf222e; }
.btn-danger:hover { background: #b91c29; }

.flash { padding: 10px 16px; border-radius: 6px; margin-bottom: 12px; }
.flash-ok { background: #dafbe1; color: #1a7f37; }
.flash-error { background: #ffebe9; color: #cf222e; }

.table { width: 100%; border-collapse: collapse; background: #fff; border-radius: 8px; overflow: hidden; }
.table th, .table td { padding: 12px 14px; border-bottom: 1px solid #e6e8eb; text-align: left; }
.table th { background: #f6f8fa; font-weight: 600; }
.ops { display: flex; gap: 6px; flex-wrap: wrap; }

.badge { padding: 2px 10px; border-radius: 10px; font-size: 0.82em; }
.badge-ok { background: #dafbe1; color: #1a7f37; }
.badge-draft { background: #fff8c5; color: #9a6700; }

.edit-form label { display: block; margin-bottom: 10px; font-weight: 500; }
.edit-form input[type=text], .edit-form select {
  width: 100%; padding: 8px 12px; border: 1px solid #d0d7de; border-radius: 6px;
  margin-top: 4px; font-size: 0.95em;
}
.form-row { display: grid; grid-template-columns: 2fr 1fr auto; gap: 16px; align-items: end; }
.checkbox { display: flex; align-items: center; gap: 6px; padding-bottom: 10px; }
.form-actions { margin-top: 16px; }
.inline-form { display: flex; gap: 10px; }
.inline-form input, .inline-form select {
  padding: 8px 12px; border: 1px solid #d0d7de; border-radius: 6px;
}

/* 登录页 */
.login-page {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  background: #f6f8fa;
}
.login-box {
  background: #fff; padding: 36px; border-radius: 10px;
  width: 340px; box-shadow: 0 4px 20px rgba(0,0,0,0.06);
}
.login-box h1 { margin: 0 0 20px; font-size: 1.3em; text-align: center; }
.login-box label { display: block; margin-bottom: 14px; font-size: 0.9em; }
.login-box input {
  width: 100%; padding: 10px 12px; margin-top: 4px;
  border: 1px solid #d0d7de; border-radius: 6px;
}
.login-box button {
  width: 100%; padding: 10px; background: #0969da; color: #fff;
  border: 0; border-radius: 6px; cursor: pointer; font-size: 1em;
}
.login-tip { margin-top: 14px; font-size: 0.8em; color: #8c959f; text-align: center; }

/* 响应式 */
@media (max-width: 768px) {
  .home-layout { grid-template-columns: 1fr; }
  .home-header { flex-direction: column; gap: 12px; align-items: flex-start; }
  .form-row { grid-template-columns: 1fr; }
}