/* 知识库阅读页优化层：侧边栏（VitePress 风格分组导航）+ 正文排版修正。
   在 styles.css 之后加载，仅作用于 .knowledge-reader。 */

/* ---------- 侧边栏基础 ---------- */
.knowledge-reader .reader-skeleton { display: grid; gap: 18px; max-width: 760px; padding-top: 18px; }
.knowledge-reader .reader-skeleton span { display: block; height: 15px; border-radius: 8px; background: var(--bg-soft); }
.knowledge-reader .reader-skeleton span:first-child { width: 38%; height: 13px; margin-bottom: 24px; }
.knowledge-reader .reader-skeleton span:nth-child(2) { width: 54%; height: 44px; margin-bottom: 28px; }
.knowledge-reader .reader-skeleton span:nth-child(3) { width: 88%; }
.knowledge-reader .reader-skeleton span:nth-child(4) { width: 72%; }

.knowledge-reader .docs-sidebar {
  padding-top: 24px;
  padding-right: 18px;
  padding-bottom: 40px;
  scrollbar-width: thin;
  scrollbar-color: var(--line-strong) transparent;
  overscroll-behavior: contain;
}

/* 顶部：所属栏目名 + 返回知识地图 */
.knowledge-reader .docs-sidebar .kb-side-top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 14px;
  padding: 0 10px 12px;
  border-bottom: 1px solid var(--line);
}
.knowledge-reader .docs-sidebar .kb-side-top span {
  font-size: 0.7812rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--text-3);
}
.knowledge-reader .docs-sidebar .kb-side-top a {
  font-size: 0.7812rem;
  font-weight: 650;
  color: var(--text-3);
  text-decoration: none;
  white-space: nowrap;
}
.knowledge-reader .docs-sidebar .kb-side-top a:hover { color: var(--primary); }

/* ---------- 分组（章节） ---------- */
.knowledge-reader .docs-sidebar .nav-group { margin: 4px 0 10px; }

.knowledge-reader .docs-sidebar .nav-group-head {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  min-height: 40px;
  padding: 8px 10px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--text);
  font-size: 0.875rem;
  font-weight: 750;
  text-align: left;
  line-height: 1.5;
  cursor: pointer;
  transition: background .15s ease;
}
.knowledge-reader .docs-sidebar .nav-group-head:hover { background: var(--surface); }

.knowledge-reader .docs-sidebar .nav-caret {
  flex: 0 0 auto;
  color: var(--text-3);
  transition: transform .18s ease;
}
.knowledge-reader .docs-sidebar .nav-group.collapsed .nav-caret { transform: rotate(-90deg); }

.knowledge-reader .docs-sidebar .nav-group-body {
  margin: 2px 0 4px 12px;
  padding-left: 8px;
  border-left: 1px solid var(--line);
}
.knowledge-reader .docs-sidebar .nav-group.collapsed .nav-group-body { display: none; }

/* ---------- 文章链接 ---------- */
.knowledge-reader .docs-sidebar .nav-group-body a {
  display: block;
  position: relative;
  margin: 2px 0;
  padding: 8px 10px;
  border-radius: 7px;
  color: var(--text-2);
  font-size: 0.9062rem;
  font-weight: 400;
  line-height: 1.6;
  text-decoration: none;
  overflow-wrap: anywhere;
  transition: background .15s ease, color .15s ease;
}
.knowledge-reader .docs-sidebar .nav-group-body a:hover { background: var(--surface); color: var(--primary); }
.knowledge-reader .docs-sidebar .nav-group-body a.active {
  background: var(--primary-soft);
  color: var(--primary);
  font-weight: 650;
}
.knowledge-reader .docs-sidebar .nav-group-body a.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 9px;
  bottom: 9px;
  width: 3px;
  border-radius: 3px;
  background: var(--primary);
}

.knowledge-reader .docs-sidebar a:focus-visible,
.knowledge-reader .docs-sidebar button:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }

.kb-mobile-categories,
.kb-mobile-categories[hidden] { display: none; }
@media (max-width: 820px) {
  .docs-body .site-header .menu-button[data-sidebar-toggle] { display: grid !important; }
  .kb-mobile-categories { display: flex; gap: 7px; overflow-x: auto; padding: 11px 18px; border-bottom: 1px solid var(--line); scrollbar-width: none; }
  .kb-mobile-categories::-webkit-scrollbar { display: none; }
  .kb-mobile-categories a { flex: none; padding: 7px 12px; border: 1px solid var(--line); border-radius: 999px; background: var(--surface); color: var(--text-2); font-size: 0.875rem; font-weight: 700; text-decoration: none; white-space: nowrap; }
  .kb-mobile-categories a.active { border-color: var(--primary); background: var(--primary-soft); color: var(--primary); }
}

/* ---------- 正文排版修正 ---------- */
/* 导入的正文自带「1、」「（1）」文字序号，关闭浏览器自动序号避免 1. (1) 重复。 */
.knowledge-reader .prose ol { list-style: none; margin: 12px 0; padding: 0; }
.knowledge-reader .prose ol > li { margin: 4px 0; }
.knowledge-reader .prose ol > li > p { margin: 6px 0; }
.knowledge-reader .prose ol > li > ol,
.knowledge-reader .prose li > ol { margin: 4px 0 8px; padding-left: 1.5em; }
/* 正文里以标题形式出现的加粗条目（1、××××：）保持节奏 */
.knowledge-reader .prose ol > li > p > strong:first-child { color: var(--text); }

/* 导入正文的提示框结构是 <strong>标题 + <p>正文（没有图标 span），
   套上站内 .callout 的 flex 布局会把标题挤成竖排，这里改回块级。 */
.knowledge-reader .prose .callout:has(> strong) { display: block; }
.knowledge-reader .prose .callout > strong { display: block; font-weight: 800; color: var(--text); }
.knowledge-reader .prose .callout > p { margin: 6px 0 0; }

/* 左侧只列文章；较长的标题最多两行，完整名称保存在链接 title 中。 */
.knowledge-reader .docs-sidebar .nav-group-body a.kb-article-link {
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  overflow: hidden;
}

/* 目录显示真实层级，不再用拼接的标题清单冒充摘要。 */
.knowledge-reader .prose .lead { margin: 12px 0 24px; font-size: 1.0625rem; line-height: 1.75; }
.knowledge-reader .prose .article-body :is(h2,h3,h4,h5) { scroll-margin-top: 0; }
@media (max-width: 1024px) {
  .knowledge-reader .prose .article-body :is(h2,h3,h4,h5) { scroll-margin-top: 30px; }
}
.knowledge-reader .prose .article-body h2 { margin-top: 42px; }
.knowledge-reader .prose .article-body h3 { margin: 36px 0 14px; font-size: 1.3125rem; font-weight: 770; line-height: 1.5; }
.knowledge-reader .prose .article-body h4 { margin: 26px 0 10px; font-size: 1.09375rem; font-weight: 750; line-height: 1.5; }
.knowledge-reader .prose .article-body h5 { margin: 22px 0 8px; font-size: 1rem; font-weight: 700; line-height: 1.5; }
.knowledge-reader .prose .article-body[data-outline-base="3"] h3 { margin-top: 48px; font-size: 1.625rem; }
.knowledge-reader .prose .article-disclaimer { margin: 38px 0 0; padding-top: 18px; border-top: 1px solid var(--line); color: var(--muted); font-size: 0.8125rem; line-height: 1.65; }
.knowledge-reader .prose .article-disclaimer strong { color: var(--text-2); }
.knowledge-reader .toc { min-width: 0; padding: 48px 20px 36px; }
.knowledge-reader .toc > strong { margin-bottom: 14px; font-size: 0.9375rem; }
.knowledge-reader .toc a { padding-block: 7px; font-size: 0.84375rem; line-height: 1.5; overflow-wrap: anywhere; }
.knowledge-reader .toc a.depth-1 { padding-left: 24px; }
.knowledge-reader .toc a.depth-2 { padding-left: 35px; }
.knowledge-reader .toc .toc-empty { color: var(--muted); font-size: 0.8125rem; }

/* ---------- 会员文章付费墙（对齐原站 saduck.top 的 .vipC1） ---------- */
/* 原站的做法：正文给出一小段试读，付费墙用负 margin 上移压住正文尾部，
   靠一条「透明 → 背景色」的竖向渐变把正文渐隐掉，再给提示与按钮。 */
.knowledge-reader .prose .vip-wall {
  position: relative;
  margin-top: -220px;
  padding-top: 220px;
  text-align: center;
  background-image: linear-gradient(-180deg, rgba(255, 255, 255, 0), var(--bg) 70%);
}
html[data-theme="dark"] .knowledge-reader .prose .vip-wall {
  background-image: linear-gradient(-180deg, rgba(13, 17, 24, 0), var(--bg) 70%);
}
.knowledge-reader .prose .vip-wall h3 {
  margin: 0 0 12px;
  padding-right: 0;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.01em;
  line-height: 1.6;
}
/* 原站 .heartbeat：红色 + 心跳缩放 */
.knowledge-reader .prose .heartbeat {
  display: inline-block;
  color: #ff2d2d;
  font-weight: 800;
  animation: vip-heartbeat 1.5s ease-in-out infinite both;
}
@keyframes vip-heartbeat {
  0%, 100% { transform: scale(1); }
  25% { transform: scale(1.12); }
  40% { transform: scale(1); }
  60% { transform: scale(1.08); }
}
.knowledge-reader .prose .vip-wall-status {
  margin: 0 0 20px;
  color: #2d5e14;
  font-size: 1rem;
  line-height: 1.8;
}
html[data-theme="dark"] .knowledge-reader .prose .vip-wall-status { color: #8fc46a; }
/* 原站状态行里的链接与按钮同色（淡紫） */
.knowledge-reader .prose .vip-wall-status a {
  color: #9b8aff;
  font-weight: 700;
  text-decoration: none;
}
.knowledge-reader .prose .vip-wall-status a:hover { text-decoration: underline; text-underline-offset: 2px; }
/* 原站 .btn：淡紫底 + 白字 */
.knowledge-reader .prose .vip-wall-btn {
  display: inline-block;
  padding: 5px 10px;
  border-radius: 5px;
  background: #9b8aff;
  color: #fff;
  font-size: 1rem;
  font-weight: 650;
  text-decoration: none;
}
.knowledge-reader .prose .vip-wall-btn:hover { filter: brightness(1.08); color: #fff; }
.knowledge-reader .prose .vip-wall-btn:focus-visible { outline: 2px solid var(--text); outline-offset: 2px; }

/* 会员文档徽标：原站是彩虹渐变文字（.rainbow-text） */
.knowledge-reader .prose .article-meta .rainbow-text {
  padding: 2px 8px;
  background: linear-gradient(90deg, #ff0080, #ff8c00, #40e0d0, #9d4edd, #ff0080);
  background-size: 400% 100%;
  border-radius: 6px;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-size: 0.8125rem;
  font-style: normal;
  font-weight: 800;
  animation: vip-rainbow 3s ease infinite;
}
@keyframes vip-rainbow {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}
@media (prefers-reduced-motion: reduce) {
  .knowledge-reader .prose .heartbeat,
  .knowledge-reader .prose .article-meta .rainbow-text { animation: none; }
}
@media (max-width: 480px) {
  .knowledge-reader .prose .vip-wall { margin-top: -160px; padding-top: 160px; }
}

/* 阅读页使用可用宽度，正文有舒适行宽限制；不再留两列无内容的白边。 */
@media (min-width: 1051px) {
  .docs-body .nav-shell { width: calc(100% - 48px); max-width: none; }
  .knowledge-reader .docs-content { padding: 40px clamp(30px, 3.7vw, 76px) 96px; }
  .knowledge-reader .prose { max-width: 1080px; margin-inline: auto; }
}
@media (min-width: 1051px) and (max-width: 1179px) {
  .knowledge-reader.docs-grid { grid-template-columns: 240px minmax(0, 1fr); }
  .knowledge-reader .docs-sidebar { padding-left: 22px; }
  .knowledge-reader .toc { display: none; }
}
@media (min-width: 1180px) {
  .knowledge-reader.docs-grid { grid-template-columns: clamp(254px, 18vw, 340px) minmax(0, 1fr) clamp(228px, 17vw, 320px); }
  .knowledge-reader .docs-sidebar { padding-left: clamp(20px, 2vw, 30px); padding-right: 18px; }
}