/* diuber.com/help 帮助中心 · 展示端样式（主站同源设计：#1677FF / PingFang SC） */
:root {
  --blue: #1677FF;
  --blue-d: #0E5FD8;
  --text: #242933;
  --text2: #5B6472;
  --text3: #8A93A2;
  --line: #E8EBF0;
  --bg: #F7F8FA;
  --card: #FFFFFF;
  --maxw: 1400px;
  --side-w: 280px;
  --outline-w: 250px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text); background: var(--bg);
  font-size: 15px; line-height: 1.7;
}
a { color: var(--blue); text-decoration: none; }
a:hover { color: var(--blue-d); }

/* ---------- 顶栏 ---------- */
.hd { position: sticky; top: 0; z-index: 50; background: #fff; border-bottom: 1px solid var(--line); }
.hd-in { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; height: 58px; display: flex; align-items: center; gap: 18px; }
.menu-btn { display: none; border: 0; background: none; color: var(--text); cursor: pointer; padding: 6px; }
.logo { display: flex; align-items: center; gap: 9px; color: var(--text); font-size: 17px; flex-shrink: 0; }
.logo img { border-radius: 6px; }
.logo strong { font-weight: 600; }
.logo-sub { font-size: 13px; color: var(--text3); border-left: 1px solid var(--line); padding-left: 9px; margin-left: 1px; }
.search { flex: 1; max-width: 360px; display: flex; align-items: center; gap: 8px; background: var(--bg); border: 1px solid var(--line); border-radius: 8px; padding: 0 12px; height: 36px; color: var(--text3); }
.search input { border: 0; outline: 0; background: none; width: 100%; font-size: 14px; color: var(--text); }
.hd-links { margin-left: auto; display: flex; gap: 22px; flex-shrink: 0; }
.hd-links a { color: var(--text2); font-size: 14px; }
.hd-links a:hover { color: var(--blue); }

/* ---------- 三栏布局 ---------- */
.layout { max-width: var(--maxw); margin: 0 auto; display: grid; grid-template-columns: var(--side-w) minmax(0, 1fr) var(--outline-w); }
.side { border-right: 1px solid var(--line); background: var(--bg); position: sticky; top: 58px; height: calc(100vh - 58px); display: flex; flex-direction: column; }
.side-scroll { flex: 1; overflow-y: auto; padding: 18px 14px; }
.grp { font-size: 13px; color: var(--text3); padding: 14px 10px 6px; font-weight: 500; }
.grp:first-child { padding-top: 2px; }
.doc-item { display: block; padding: 7px 10px; border-radius: 8px; color: var(--text2); font-size: 14px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.doc-item:hover { background: #EEF3FB; color: var(--text); }
.doc-item.cur { background: #E8F0FE; color: var(--blue); font-weight: 500; }
.side-foot { border-top: 1px solid var(--line); padding: 10px 16px; font-size: 12px; color: var(--text3); display: flex; justify-content: space-between; }
.side-foot a { color: var(--text3); }
.side-foot a:hover { color: var(--blue); }

.main { padding: 34px 44px 60px; min-height: calc(100vh - 58px); background: var(--card); }
.doc { max-width: 800px; }
.doc-title { font-size: 26px; font-weight: 600; line-height: 1.4; margin-bottom: 10px; }
.meta { display: flex; gap: 16px; color: var(--text3); font-size: 13px; padding-bottom: 18px; border-bottom: 1px solid var(--line); margin-bottom: 24px; }

/* ---------- 正文排版 ---------- */
.doc-content { font-size: 15px; color: var(--text); word-break: break-word; }
.doc-content h2 { font-size: 21px; font-weight: 600; margin: 34px 0 14px; padding-left: 10px; border-left: 4px solid var(--blue); line-height: 1.4; }
.doc-content h3 { font-size: 17px; font-weight: 600; margin: 26px 0 10px; }
.doc-content p { margin: 10px 0; }
.doc-content ul, .doc-content ol { padding-left: 24px; margin: 10px 0; }
.doc-content li { margin: 6px 0; }
.doc-content strong { color: #C2410C; }
.doc-content blockquote { border-left: 4px solid var(--blue); background: #F0F6FF; padding: 10px 16px; margin: 14px 0; border-radius: 0 8px 8px 0; color: var(--text2); }
.doc-content code { background: #F1F3F6; border: 1px solid var(--line); border-radius: 4px; padding: 1px 6px; font-size: 13px; font-family: "SF Mono", Menlo, Consolas, monospace; }
.doc-content pre { background: #282C34; color: #D8DEE9; border-radius: 10px; padding: 16px 18px; overflow-x: auto; margin: 14px 0; }
.doc-content pre code { background: none; border: 0; color: inherit; padding: 0; font-size: 13px; line-height: 1.6; }
.doc-content img { max-width: 100%; border-radius: 10px; border: 1px solid var(--line); margin: 8px 0; }
.doc-content table { border-collapse: collapse; width: 100%; margin: 14px 0; font-size: 14px; }
.doc-content th, .doc-content td { border: 1px solid var(--line); padding: 8px 12px; text-align: left; }
.doc-content th { background: var(--bg); font-weight: 500; }
.doc-content tr:nth-child(even) td { background: #FAFBFC; }
.doc-content hr { border: 0; border-top: 1px solid var(--line); margin: 26px 0; }
.doc-content a { border-bottom: 1px solid transparent; }
.doc-content a:hover { border-bottom-color: var(--blue); }

/* 上一页 / 下一页 */
.pn { max-width: 800px; display: flex; justify-content: space-between; gap: 16px; margin-top: 40px; padding-top: 20px; border-top: 1px solid var(--line); }
.pn a { flex: 1; max-width: 46%; border: 1px solid var(--line); border-radius: 10px; padding: 10px 16px; display: flex; flex-direction: column; color: var(--text); overflow: hidden; }
.pn a small { color: var(--text3); font-size: 12px; }
.pn a:hover { border-color: var(--blue); color: var(--blue); }
.pn-next { text-align: right; margin-left: auto; align-items: flex-end; }
.pn a span, .pn a { white-space: nowrap; text-overflow: ellipsis; overflow: hidden; }

/* ---------- 右侧大纲 ---------- */
.outline { position: sticky; top: 58px; height: calc(100vh - 58px); overflow-y: auto; padding: 30px 18px; font-size: 13px; }
.outline-title { color: var(--text3); font-size: 13px; font-weight: 500; margin-bottom: 10px; }
.outline-nav { border-left: 2px solid var(--line); }
.outline-nav a { display: block; color: var(--text2); padding: 5px 0 5px 14px; border-left: 2px solid transparent; margin-left: -2px; line-height: 1.5; }
.outline-nav a:hover { color: var(--blue); }
.outline-nav a.ol-l3 { padding-left: 28px; font-size: 12px; }
.outline-nav a.on { color: var(--blue); border-left-color: var(--blue); font-weight: 500; }

/* 搜索结果 */
.search-list { list-style: none; }
.search-list li { padding: 12px 0; border-bottom: 1px solid var(--line); }
.search-list a { font-size: 16px; font-weight: 500; }
.search-list p { color: var(--text3); font-size: 13px; margin-top: 4px; }

/* 移动端「大纲」按钮（顶栏右侧） */
.outline-btn { display: none; margin-left: auto; align-items: center; gap: 5px; background: var(--blue); color: #fff; border: 0; border-radius: 8px; padding: 6px 12px; font-size: 13px; font-family: inherit; cursor: pointer; flex-shrink: 0; user-select: none; }
.outline-btn:active { background: var(--blue-d); }
/* CSS 兜底开关：即使 JS 未加载（缓存/报错），点击也能展开大纲 */
.outline-toggle { display: none; }

/* ---------- 响应式 ---------- */
.mask { display: none; position: fixed; inset: 0; background: rgba(0,0,0,.35); z-index: 60; }
@media (max-width: 1080px) {
  .layout { grid-template-columns: var(--side-w) minmax(0, 1fr); }
  /* 大纲改为右侧抽屉，手机/平板也能随时跳转 */
  .outline-btn { display: inline-flex; }
  .outline {
    position: fixed; right: 0; top: 58px; bottom: 0; z-index: 70;
    width: 270px; max-width: 80vw; background: #fff;
    border-left: 1px solid var(--line); box-shadow: -4px 0 24px rgba(0,0,0,.08);
    transform: translateX(100%); transition: transform .22s ease;
    height: auto; overflow-y: auto; padding: 20px 18px;
  }
  body.outline-open .outline { transform: none; }
  body.outline-open .mask { display: block; }
  /* CSS 兜底：checkbox 选中即展开（不依赖 JS） */
  #outlineToggle:checked ~ .layout .outline { transform: none; }
  #outlineToggle:checked ~ .mask { display: block; }
}
@media (max-width: 768px) {
  .menu-btn { display: block; }
  .hd-links { display: none; }
  .logo-sub { display: none; }
  .layout { display: block; }
  .main { padding: 22px 18px 50px; }
  .side { position: fixed; left: 0; top: 58px; bottom: 0; z-index: 70; width: 300px; max-width: 82vw; transform: translateX(-105%); transition: transform .22s ease; box-shadow: 4px 0 24px rgba(0,0,0,.08); }
  body.side-open .side { transform: none; }
  body.side-open .mask { display: block; }
  .doc-title { font-size: 22px; }
  .pn a { max-width: none; }
}