/* ==========================================================================
   Kboke 3 — 设计系统
   原则：
   1. 紧凑无框：少边框，用底色分层与间距建立层级
   2. 无侧边栏：正文单列定宽，阅读优先
   3. 色弱友好：状态色只用 蓝/橙/灰 安全对，且一律「颜色+文字」双编码；
      主按钮深底白字（明度强对比），不靠色相区分
   4. 无右侧弹窗/抽屉/模态框：一切交互用页内展开 + 行内提示
   ========================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root {
  /* 色板（中性 + 安全色对） */
  --kb3-bg: #f6f7f9;
  --kb3-surface: #ffffff;
  --kb3-surface-2: #eef0f4;
  --kb3-text: #1c2330;
  --kb3-text-2: #5a6478;
  --kb3-text-3: #8b94a8;
  --kb3-line: #e5e8ef;
  --kb3-accent: #1f6feb;        /* 蓝：链接/主行动 */
  --kb3-accent-deep: #1558c0;   /* 深蓝：主按钮底色 */
  --kb3-accent-soft: #e8f0fe;   /* 浅蓝底：徽标/悬停 */
  --kb3-warn: #b45309;          /* 橙：警告（配文字，非纯色） */
  --kb3-ink: #101623;           /* 深墨：按钮/页脚底 */

  /* 形状与阴影 */
  --kb3-r: 12px;
  --kb3-r-s: 8px;
  --kb3-shadow: 0 1px 2px rgba(16, 24, 40, .04), 0 6px 20px rgba(16, 24, 40, .06);
  --kb3-shadow-hover: 0 2px 4px rgba(16, 24, 40, .06), 0 12px 32px rgba(16, 24, 40, .10);

  /* 布局 */
  --kb3-maxw: 1080px;
  --kb3-measure: 760px;

  /* 字体 */
  --kb3-font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --kb3-font-mono: ui-monospace, SFMono-Regular, Consolas, "Courier New", monospace;
}

/* ---------- 2. 基础重置 ---------- */
*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--kb3-bg);
  color: var(--kb3-text);
  font-family: var(--kb3-font);
  font-size: 16px;
  line-height: 1.7;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }

a { color: var(--kb3-accent); text-decoration: none; transition: color .15s ease; }
a:hover { color: var(--kb3-accent-deep); }

:focus-visible { outline: 2px solid var(--kb3-accent); outline-offset: 2px; border-radius: 4px; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}

.kb3-sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.kb3-skip {
  position: absolute; left: 12px; top: -48px; z-index: 100;
  background: var(--kb3-ink); color: #fff; padding: 8px 14px; border-radius: var(--kb3-r-s);
  transition: top .15s ease;
}
.kb3-skip:focus { top: 12px; color: #fff; }

.kb3-wrap { max-width: var(--kb3-maxw); margin: 0 auto; padding: 20px 20px 48px; }

/* ---------- 3. 页头 ---------- */
.kb3-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: saturate(1.2) blur(8px);
  border-bottom: 1px solid var(--kb3-line);
}

.kb3-header-in {
  max-width: var(--kb3-maxw); margin: 0 auto; padding: 0 20px;
  height: 60px; display: flex; align-items: center; gap: 18px;
}

.kb3-brand { display: flex; align-items: center; gap: 10px; min-width: 0; }
.kb3-logo img { max-height: 36px; width: auto; }
.kb3-logo .custom-logo-link { display: block; line-height: 0; }

.kb3-site-title {
  margin: 0; font-size: 19px; font-weight: 700; letter-spacing: .2px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.kb3-site-title a { color: var(--kb3-text); }
.kb3-site-title a:hover { color: var(--kb3-accent); }

.kb3-nav { margin-left: auto; min-width: 0; }
.kb3-nav-list {
  display: flex; align-items: center; gap: 4px;
  list-style: none; margin: 0; padding: 0;
}
.kb3-nav-list li { position: relative; }
.kb3-nav-list a {
  display: block; padding: 8px 12px; border-radius: var(--kb3-r-s);
  color: var(--kb3-text-2); font-size: 15px; font-weight: 500; white-space: nowrap;
}
.kb3-nav-list a:hover { color: var(--kb3-accent); background: var(--kb3-accent-soft); }
.kb3-nav-list .current-menu-item > a,
.kb3-nav-list .current_page_item > a {
  color: var(--kb3-accent); background: var(--kb3-accent-soft);
}
/* 二级菜单（页内展开，非弹窗浮层） */
.kb3-nav-list .sub-menu {
  list-style: none; margin: 0; padding: 6px;
  position: absolute; left: 0; top: calc(100% + 6px);
  min-width: 160px; background: var(--kb3-surface);
  border-radius: var(--kb3-r-s); box-shadow: var(--kb3-shadow);
  opacity: 0; visibility: hidden; transform: translateY(-4px);
  transition: opacity .15s ease, transform .15s ease, visibility .15s;
}
.kb3-nav-list li:hover > .sub-menu,
.kb3-nav-list li:focus-within > .sub-menu {
  opacity: 1; visibility: visible; transform: translateY(0);
}
.kb3-nav-list .sub-menu a { font-size: 14px; padding: 8px 10px; }

.kb3-search-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 36px; height: 36px; flex: 0 0 auto;
  border: 0; border-radius: 50%; background: transparent; color: var(--kb3-text-2);
  cursor: pointer;
}
.kb3-search-toggle:hover { background: var(--kb3-surface-2); color: var(--kb3-accent); }
.kb3-search-toggle[aria-expanded="true"] { background: var(--kb3-accent-soft); color: var(--kb3-accent); }

.kb3-burger {
  display: none; align-items: center; justify-content: center;
  width: 36px; height: 36px; flex: 0 0 auto;
  border: 0; border-radius: var(--kb3-r-s); background: transparent; color: var(--kb3-text-2);
  cursor: pointer;
}
.kb3-burger:hover { background: var(--kb3-surface-2); }

/* 页内搜索条（展开在页头下方） */
.kb3-searchbar {
  border-top: 1px solid var(--kb3-line);
  background: var(--kb3-surface);
  padding: 12px 20px;
}
.kb3-searchbar[hidden] { display: none; }

.kb3-searchform { display: flex; gap: 8px; max-width: var(--kb3-maxw); margin: 0 auto; }
.kb3-search-input {
  flex: 1; min-width: 0; height: 40px; padding: 0 14px;
  border: 1px solid var(--kb3-line); border-radius: var(--kb3-r-s);
  background: var(--kb3-bg); color: var(--kb3-text); font-size: 15px; font-family: inherit;
}
.kb3-search-input:focus { outline: 2px solid var(--kb3-accent); outline-offset: -1px; border-color: transparent; background: var(--kb3-surface); }
.kb3-search-submit {
  height: 40px; padding: 0 20px; border: 0; border-radius: var(--kb3-r-s);
  background: var(--kb3-accent-deep); color: #fff; font-size: 15px; font-weight: 600;
  cursor: pointer; font-family: inherit;
}
.kb3-search-submit:hover { background: #0f4aa0; }

/* 移动端菜单面板（页内展开） */
.kb3-mobile-panel {
  border-top: 1px solid var(--kb3-line);
  background: var(--kb3-surface);
  padding: 8px 12px 12px;
  max-height: 70vh; overflow-y: auto;
}
.kb3-mobile-panel[hidden] { display: none; }
.kb3-mobile-list, .kb3-mobile-list .sub-menu { list-style: none; margin: 0; padding: 0; }
.kb3-mobile-list .sub-menu { padding-left: 16px; }
.kb3-mobile-list a {
  display: block; padding: 10px 12px; border-radius: var(--kb3-r-s);
  color: var(--kb3-text); font-size: 15px; font-weight: 500;
}
.kb3-mobile-list a:hover { background: var(--kb3-accent-soft); color: var(--kb3-accent); }
.kb3-mobile-list .current-menu-item > a,
.kb3-mobile-list .current_page_item > a { background: var(--kb3-accent-soft); color: var(--kb3-accent); }

/* ---------- 4. 通用组件 ---------- */
.kb3-btn { display: inline-flex; align-items: center; gap: 6px; font-family: inherit; cursor: pointer; }
.kb3-btn-primary {
  background: var(--kb3-accent-deep); color: #fff; border: 0;
  padding: 9px 20px; border-radius: var(--kb3-r-s); font-size: 15px; font-weight: 600;
}
.kb3-btn-primary:hover { background: #0f4aa0; color: #fff; }

.kb3-chip {
  display: inline-block; padding: 3px 10px; border-radius: 999px;
  background: var(--kb3-accent-soft); color: var(--kb3-accent-deep);
  font-size: 12.5px; font-weight: 600; line-height: 1.6; white-space: nowrap;
}
.kb3-chip:hover { background: #d8e5fc; color: var(--kb3-accent-deep); }

/* 面包屑（页内文本条） */
.kb3-breadcrumb {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px;
  font-size: 13px; color: var(--kb3-text-3); margin: 4px 0 18px;
}
.kb3-breadcrumb a { color: var(--kb3-text-2); }
.kb3-breadcrumb a:hover { color: var(--kb3-accent); }
.kb3-crumb-sep { color: var(--kb3-line); }
.kb3-crumb-cur { color: var(--kb3-text-3); }

/* 归档页头 */
.kb3-archive-head { margin: 6px 0 22px; }
.kb3-archive-title { margin: 0 0 6px; font-size: 26px; font-weight: 700; letter-spacing: .2px; }
.kb3-archive-desc { color: var(--kb3-text-2); font-size: 14.5px; margin: 0; }

/* ---------- 5. 文章卡片网格 ---------- */
.kb3-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}

.kb3-card {
  display: flex; flex-direction: column;
  background: var(--kb3-surface); border-radius: var(--kb3-r);
  box-shadow: var(--kb3-shadow); overflow: hidden;
  transition: box-shadow .18s ease, transform .18s ease;
}
.kb3-card:hover { box-shadow: var(--kb3-shadow-hover); transform: translateY(-2px); }

.kb3-card-cover {
  display: block; aspect-ratio: 16 / 9; overflow: hidden;
  background: var(--kb3-surface-2);
}
.kb3-card-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform .3s ease; }
.kb3-card:hover .kb3-card-cover img { transform: scale(1.03); }
.kb3-card-cover-fallback {
  display: flex; align-items: center; justify-content: center; width: 100%; height: 100%;
  font-size: 40px; font-weight: 700; color: var(--kb3-text-3);
  background: linear-gradient(135deg, var(--kb3-surface-2), #e2e7f0);
}

.kb3-card-body { display: flex; flex-direction: column; flex: 1; padding: 14px 16px 16px; }
.kb3-card-top { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 8px; }
.kb3-card-date { color: var(--kb3-text-3); font-size: 12.5px; white-space: nowrap; }

.kb3-card-title { margin: 0 0 6px; font-size: 17px; font-weight: 700; line-height: 1.45; }
.kb3-card-title a {
  color: var(--kb3-text);
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.kb3-card-title a:hover { color: var(--kb3-accent); }

.kb3-card-excerpt {
  margin: 0 0 12px; color: var(--kb3-text-2); font-size: 14px; line-height: 1.65;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}

.kb3-card-meta {
  margin-top: auto; display: flex; align-items: center; gap: 8px;
  color: var(--kb3-text-3); font-size: 12.5px;
}
.kb3-card-meta a { color: var(--kb3-text-3); }
.kb3-card-meta a:hover { color: var(--kb3-accent); }

/* ---------- 6. 分页 ---------- */
.kb3-pagination { margin: 28px 0 6px; }
.kb3-pagination .nav-links { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px; }
.kb3-pagination .page-numbers {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 38px; height: 38px; padding: 0 12px;
  border-radius: var(--kb3-r-s); background: var(--kb3-surface);
  color: var(--kb3-text-2); font-size: 14px; font-weight: 500;
  box-shadow: var(--kb3-shadow);
}
.kb3-pagination a.page-numbers:hover { color: var(--kb3-accent); background: var(--kb3-accent-soft); }
.kb3-pagination .page-numbers.current {
  background: var(--kb3-accent-deep); color: #fff; font-weight: 600;
}
.kb3-pagination .page-numbers.dots { background: transparent; box-shadow: none; }

/* ---------- 7. 文章详情 ---------- */
.kb3-single {
  max-width: var(--kb3-measure); margin: 0 auto;
  background: var(--kb3-surface); border-radius: var(--kb3-r);
  box-shadow: var(--kb3-shadow); padding: 32px 36px 36px;
}

.kb3-entry-head { margin-bottom: 20px; }
.kb3-entry-head .kb3-chip { margin-bottom: 12px; }
.kb3-entry-title {
  margin: 0 0 12px; font-size: 28px; font-weight: 700;
  line-height: 1.35; letter-spacing: .2px;
}
.kb3-entry-meta {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px;
  color: var(--kb3-text-3); font-size: 13.5px;
}
.kb3-entry-meta a { color: var(--kb3-text-3); }
.kb3-entry-meta a:hover { color: var(--kb3-accent); }

.kb3-entry-cover { margin: 0 0 24px; }
.kb3-entry-cover img { width: 100%; border-radius: var(--kb3-r-s); }

/* 目录 + 正文双列（宽屏目录靠左吸附，页内布局非浮层） */
.kb3-entry-layout { position: relative; }
.kb3-toc {
  position: absolute; right: calc(100% + 40px); top: 4px;
  width: 200px; font-size: 13px;
}
.kb3-toc[hidden] { display: none; }
.kb3-toc-title { font-weight: 700; color: var(--kb3-text-2); margin-bottom: 8px; }
.kb3-toc-nav a {
  display: block; padding: 4px 0 4px 12px; color: var(--kb3-text-3);
  border-left: 2px solid var(--kb3-line); line-height: 1.5;
}
.kb3-toc-nav a:hover { color: var(--kb3-accent); }
.kb3-toc-nav a.kb3-toc-active {
  color: var(--kb3-accent); border-left-color: var(--kb3-accent); font-weight: 600;
}
.kb3-toc-nav .kb3-toc-l3 { padding-left: 26px; }

/* 正文排版 */
.kb3-entry-content { font-size: 16.5px; line-height: 1.85; color: var(--kb3-text); word-wrap: break-word; }
.kb3-entry-content > *:first-child { margin-top: 0; }

.kb3-entry-content h2,
.kb3-entry-content h3,
.kb3-entry-content h4 { margin: 1.6em 0 .6em; font-weight: 700; line-height: 1.4; }
.kb3-entry-content h2 { font-size: 22px; padding-left: 12px; border-left: 4px solid var(--kb3-accent); }
.kb3-entry-content h3 { font-size: 18.5px; }
.kb3-entry-content h4 { font-size: 16.5px; }

.kb3-entry-content p { margin: 0 0 1.1em; }

.kb3-entry-content ul, .kb3-entry-content ol { margin: 0 0 1.1em; padding-left: 1.6em; }
.kb3-entry-content li { margin-bottom: .4em; }

.kb3-entry-content blockquote {
  margin: 1.2em 0; padding: 12px 18px;
  background: var(--kb3-accent-soft); border-left: 4px solid var(--kb3-accent);
  border-radius: 0 var(--kb3-r-s) var(--kb3-r-s) 0; color: var(--kb3-text-2);
}
.kb3-entry-content blockquote p:last-child { margin-bottom: 0; }

.kb3-entry-content code {
  font-family: var(--kb3-font-mono); font-size: .88em;
  background: var(--kb3-surface-2); padding: 2px 6px; border-radius: 4px;
}
.kb3-entry-content pre {
  position: relative; margin: 1.2em 0; padding: 16px 18px;
  background: var(--kb3-ink); color: #e6eaf2; border-radius: var(--kb3-r-s);
  overflow-x: auto; font-size: 13.5px; line-height: 1.6;
}
.kb3-entry-content pre code { background: transparent; padding: 0; color: inherit; }
.kb3-code-copy {
  position: absolute; right: 8px; top: 8px;
  border: 0; border-radius: 6px; padding: 4px 10px;
  background: rgba(255, 255, 255, .14); color: #e6eaf2;
  font-size: 12px; cursor: pointer; font-family: inherit;
}
.kb3-code-copy:hover { background: rgba(255, 255, 255, .26); }

.kb3-entry-content img { border-radius: var(--kb3-r-s); }
.kb3-entry-content a { text-decoration: underline; text-underline-offset: 3px; text-decoration-color: rgba(31, 111, 235, .4); }
.kb3-entry-content a:hover { text-decoration-color: currentColor; }

.kb3-entry-content table {
  width: 100%; border-collapse: collapse; margin: 1.2em 0; font-size: 14.5px;
}
.kb3-entry-content th, .kb3-entry-content td {
  border: 1px solid var(--kb3-line); padding: 9px 12px; text-align: left;
}
.kb3-entry-content th { background: var(--kb3-surface-2); font-weight: 600; }

.kb3-entry-content hr { border: 0; border-top: 1px solid var(--kb3-line); margin: 2em 0; }

.kb3-page-links { margin: 1.5em 0; color: var(--kb3-text-2); font-size: 14px; }
.kb3-page-links span { padding: 0 6px; color: var(--kb3-accent); font-weight: 600; }

/* 标签行 */
.kb3-tags {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px;
  margin-top: 28px; padding-top: 20px; border-top: 1px solid var(--kb3-line);
}
.kb3-tags-label { color: var(--kb3-text-3); font-size: 13px; }
.kb3-tag {
  display: inline-block; padding: 3px 10px; border-radius: 999px;
  background: var(--kb3-surface-2); color: var(--kb3-text-2);
  font-size: 12.5px; font-weight: 500;
}
.kb3-tag:hover { background: var(--kb3-accent-soft); color: var(--kb3-accent); }

/* 上一篇/下一篇 */
.kb3-postnav {
  display: grid; grid-template-columns: 1fr 1fr; gap: 14px;
  max-width: var(--kb3-measure); margin: 18px auto 0;
}
.kb3-postnav-item {
  display: flex; flex-direction: column; gap: 4px;
  padding: 14px 16px; border-radius: var(--kb3-r);
  background: var(--kb3-surface); box-shadow: var(--kb3-shadow);
}
.kb3-postnav-next { text-align: right; align-items: flex-end; }
.kb3-postnav-item:hover { box-shadow: var(--kb3-shadow-hover); }
.kb3-postnav-label { color: var(--kb3-text-3); font-size: 12.5px; }
.kb3-postnav-title {
  color: var(--kb3-text); font-size: 14.5px; font-weight: 600; line-height: 1.5;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.kb3-postnav-item:hover .kb3-postnav-title { color: var(--kb3-accent); }
.kb3-postnav-none .kb3-postnav-title { visibility: hidden; }

/* 作者卡 */
.kb3-authorcard {
  display: flex; gap: 14px; align-items: flex-start;
  max-width: var(--kb3-measure); margin: 18px auto 0;
  padding: 18px 20px; border-radius: var(--kb3-r);
  background: var(--kb3-surface); box-shadow: var(--kb3-shadow);
}
.kb3-authorcard-avatar img { border-radius: 50%; }
.kb3-authorcard-name { font-weight: 700; margin-bottom: 4px; }
.kb3-authorcard-desc { margin: 0; color: var(--kb3-text-2); font-size: 14px; line-height: 1.65; }

/* ---------- 8. 评论 ---------- */
.kb3-comments-wrap { max-width: var(--kb3-measure); margin: 28px auto 0; }
.kb3-comments {
  background: var(--kb3-surface); border-radius: var(--kb3-r);
  box-shadow: var(--kb3-shadow); padding: 24px 28px;
}
.kb3-comments-title { margin: 0 0 16px; font-size: 18px; font-weight: 700; }
.kb3-comments-none { color: var(--kb3-text-3); font-size: 14px; }
.kb3-comment-protected { color: var(--kb3-text-2); }

.kb3-comment-list { list-style: none; margin: 0; padding: 0; }
.kb3-comment-list .children { list-style: none; margin: 0; padding-left: 44px; }
.kb3-comment { padding: 14px 0; border-top: 1px solid var(--kb3-line); }
.kb3-comment-list > .kb3-comment:first-child { border-top: 0; padding-top: 0; }

.kb3-comment-head { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; flex-wrap: wrap; }
.kb3-comment-avatar img { border-radius: 50%; display: block; }
.kb3-comment-author { font-weight: 600; font-size: 14.5px; }
.kb3-comment-badge {
  padding: 1px 8px; border-radius: 999px;
  background: var(--kb3-ink); color: #fff; font-size: 11.5px; font-weight: 600;
}
.kb3-comment-date { margin-left: auto; font-size: 12.5px; color: var(--kb3-text-3); }
.kb3-comment-date a { color: var(--kb3-text-3); }
.kb3-comment-text { font-size: 14.5px; line-height: 1.7; color: var(--kb3-text); }
.kb3-comment-text p { margin: 0 0 .5em; }
.kb3-comment-pending { color: var(--kb3-warn); font-size: 13.5px; }
.kb3-comment-reply, .kb3-comment-edit { font-size: 13px; margin-right: 12px; }
.kb3-comment-reply a, .kb3-comment-edit a { color: var(--kb3-accent); }

.kb3-commentform { margin-top: 8px; }
.kb3-commentform-title { margin: 20px 0 12px; font-size: 16px; font-weight: 700; padding-top: 16px; border-top: 1px solid var(--kb3-line); }
.kb3-cf-row { display: flex; flex-direction: column; gap: 6px; margin-bottom: 12px; }
.kb3-cf-row label { font-size: 13.5px; font-weight: 600; color: var(--kb3-text-2); }
.kb3-req { color: var(--kb3-warn); }
.kb3-cf-hint { font-size: 12px; color: var(--kb3-text-3); font-weight: 400; }
.kb3-cf-row input, .kb3-cf-row textarea {
  border: 1px solid var(--kb3-line); border-radius: var(--kb3-r-s);
  padding: 10px 12px; font-size: 14.5px; font-family: inherit;
  background: var(--kb3-bg); color: var(--kb3-text);
}
.kb3-cf-row input:focus, .kb3-cf-row textarea:focus {
  outline: 2px solid var(--kb3-accent); outline-offset: -1px; background: var(--kb3-surface);
}
.kb3-comment-logged-in-as { font-size: 13.5px; color: var(--kb3-text-2); }

/* ---------- 9. 空态 / 404 ---------- */
.kb3-empty, .kb3-404 {
  text-align: center; padding: 56px 20px;
  background: var(--kb3-surface); border-radius: var(--kb3-r); box-shadow: var(--kb3-shadow);
}
.kb3-empty-title, .kb3-404-title { margin: 0 0 8px; font-size: 19px; font-weight: 700; }
.kb3-empty-text, .kb3-404-text { margin: 0 0 18px; color: var(--kb3-text-2); font-size: 14.5px; }
.kb3-404-code { margin: 0 0 6px; font-size: 56px; font-weight: 800; color: var(--kb3-accent-soft); -webkit-text-stroke: 2px var(--kb3-accent); letter-spacing: 4px; }
.kb3-404 .kb3-searchbar-inline { max-width: 460px; margin: 0 auto; }

.kb3-section-title { margin: 32px 0 16px; font-size: 20px; font-weight: 700; }

.kb3-searchbar-inline {
  border: 0; background: transparent; padding: 0;
  margin: 0 0 24px; display: block;
}

/* ---------- 10. 页脚 ---------- */
.kb3-footer { margin-top: 32px; background: var(--kb3-ink); color: #c3cad6; }
.kb3-footer-in {
  max-width: var(--kb3-maxw); margin: 0 auto; padding: 36px 20px 24px;
  display: flex; flex-wrap: wrap; gap: 32px; justify-content: space-between;
}
.kb3-footer-name { color: #fff; font-size: 17px; font-weight: 700; margin-bottom: 6px; }
.kb3-footer-desc { margin: 0; font-size: 13.5px; color: #8b94a8; max-width: 420px; }
.kb3-footer-list { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 4px 18px; }
.kb3-footer-list a { color: #c3cad6; font-size: 13.5px; }
.kb3-footer-list a:hover { color: #fff; }
.kb3-footer-bar {
  border-top: 1px solid rgba(255, 255, 255, .1);
  max-width: var(--kb3-maxw); margin: 0 auto; padding: 14px 20px;
  display: flex; flex-wrap: wrap; gap: 6px 16px; justify-content: space-between;
  font-size: 12.5px; color: #8b94a8;
}
.kb3-widget { margin-bottom: 20px; }
.kb3-widget-title { font-size: 14px; color: #fff; margin: 0 0 8px; }
.kb3-widget ul { list-style: none; margin: 0; padding: 0; }
.kb3-widget a { color: #c3cad6; font-size: 13.5px; }

/* 回顶部（页内按钮，固定角标非抽屉） */
.kb3-totop {
  position: fixed; right: 18px; bottom: 18px; z-index: 40;
  display: inline-flex; align-items: center; gap: 5px;
  border: 0; border-radius: 999px; padding: 9px 14px;
  background: var(--kb3-ink); color: #fff; font-size: 13px; font-weight: 600;
  cursor: pointer; box-shadow: var(--kb3-shadow-hover);
}
.kb3-totop:hover { background: var(--kb3-accent-deep); }
.kb3-totop[hidden] { display: none; }

/* ---------- 11. 响应式 ---------- */
@media (max-width: 1240px) {
  .kb3-toc { position: static; width: auto; margin-bottom: 20px; padding: 12px 16px; background: var(--kb3-bg); border-radius: var(--kb3-r-s); }
  .kb3-toc-nav a { border-left-color: transparent; padding-left: 0; }
  .kb3-toc-nav a.kb3-toc-active { color: var(--kb3-accent); }
}

@media (max-width: 860px) {
  .kb3-nav { display: none; }
  .kb3-burger { display: inline-flex; }
  .kb3-header-in { gap: 10px; }
  .kb3-search-toggle { margin-left: auto; }
  .kb3-nav + .kb3-search-toggle { margin-left: 0; }

  .kb3-wrap { padding: 16px 14px 40px; }
  .kb3-grid { grid-template-columns: 1fr; gap: 14px; }

  .kb3-single { padding: 22px 18px 26px; }
  .kb3-entry-title { font-size: 23px; }
  .kb3-entry-content { font-size: 16px; }
  .kb3-entry-content h2 { font-size: 20px; }

  .kb3-postnav { grid-template-columns: 1fr; }
  .kb3-postnav-none { display: none; }

  .kb3-comments { padding: 18px 16px; }
  .kb3-comment-list .children { padding-left: 20px; }

  .kb3-footer-in { flex-direction: column; gap: 22px; }
}

@media (max-width: 480px) {
  .kb3-site-title { font-size: 17px; }
  .kb3-totop span { display: none; }
  .kb3-totop { padding: 10px; }
}