@charset "UTF-8";
/*
 * Theme Name:  Lidushuxi Theme
 * Theme URI:   https://lidushuxi.com
 * Description: 极简黑白灰风格，浅蓝/深蓝强调色，大量留白，无限滚动首页，响应式设计。
 * Author:      lidushuxi
 * Author URI:  https://lidushuxi.com
 * Version:     1.0.0
 * Text Domain: lidushuxi-theme
 * License:     GPL-2.0-or-later
 */

/* ═══════════════════════════════════════════════════
   0. CSS 变量 / Design Tokens
   ═══════════════════════════════════════════════════ */
:root {
  /* 色彩 */
  --clr-bg:          #ffffff;
  --clr-surface:     #f7f8fa;
  --clr-border:      #e5e7eb;
  --clr-text:        #1a1a1a;
  --clr-text-muted:  #6b7280;
  --clr-heading:     #111111;

  /* 蓝色强调（参考 cn.wordpress.org）*/
  --clr-accent:      #0073aa;   /* WordPress 蓝 */
  --clr-accent-lt:   #00a0d2;   /* 浅蓝 */
  --clr-accent-dk:   #006291;   /* 深蓝 */
  --clr-accent-bg:   #e8f4fb;   /* 蓝色背景淡底 */

  /* 排版 */
  --font-sans:  -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
  --font-mono:  "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  --base-size:  17px;
  --line-height: 1.75;

  /* 尺寸 */
  --max-content: 720px;
  --max-wide:    1100px;
  --header-h:    112px;   /* 双行页眉高度参考值 */
  --radius:      6px;

  /* 间距 */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 32px;
  --space-xl: 64px;
}

/* ═══════════════════════════════════════════════════
   1. Reset / Base
   ═══════════════════════════════════════════════════ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-size: var(--base-size);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  color: var(--clr-text);
  background: var(--clr-bg);
  line-height: var(--line-height);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

a {
  color: var(--clr-accent);
  text-decoration: none;
  transition: color .15s;
}
a:hover { color: var(--clr-accent-dk); text-decoration: underline; }

h1,h2,h3,h4,h5,h6 {
  font-weight: 700;
  color: var(--clr-heading);
  line-height: 1.3;
}

ul, ol { padding-left: 1.5em; }
code, kbd, pre { font-family: var(--font-mono); }
pre { overflow-x: auto; }

/* ═══════════════════════════════════════════════════
   2. Layout — 页面骨架
   ═══════════════════════════════════════════════════ */
.site { display: flex; flex-direction: column; min-height: 100vh; }

.site-main {
  flex: 1;
  width: 100%;
  max-width: var(--max-wide);
  margin: 0 auto;
  padding: var(--space-xl) var(--space-lg);
}

/* 文章内容限制宽度 */
.entry-content > * {
  max-width: var(--max-content);
  margin-left: auto;
  margin-right: auto;
}
.entry-content .wp-block-image,
.entry-content .alignwide  { max-width: 960px; }
.entry-content .alignfull  { max-width: 100%; }

/* ═══════════════════════════════════════════════════
   3. 页眉 (Header)
   ═══════════════════════════════════════════════════ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--clr-bg);
  border-bottom: 1px solid var(--clr-border);
  transition: box-shadow .2s;
}
.site-header.is-scrolled {
  box-shadow: 0 2px 12px rgba(0,0,0,.07);
}

/* ── 第一行：Logo + 搜索 ── */
.header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  max-width: var(--max-wide);
  margin: 0 auto;
  padding: 20px var(--space-lg);
}

.site-logo a,
.site-title-link {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: var(--clr-heading);
  font-size: 1.3rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}
.site-logo img { height: 40px; width: auto; }

/* ── 搜索区 ── */
.header-search {
  flex-shrink: 0;
  margin-left: auto;
  display: flex;
  align-items: center;
}
.header-search > form { flex: 1; display: flex; align-items: center; border: 1.5px solid var(--clr-border); border-radius: 999px; transition: border-color .2s, box-shadow .2s; }
.header-search > form:focus-within { border-color: var(--clr-accent); box-shadow: 0 0 0 3px var(--clr-accent-bg); }
.header-search > form input[type="search"] { flex: 1; border: none; outline: none; padding: 7px 14px; font-size: .9rem; background: transparent; color: var(--clr-text); min-width: 0; }
.header-search > form input[type="submit"] { border: none; background: transparent; padding: 7px 12px; cursor: pointer; color: var(--clr-text-muted); font-size: 0; }
.header-search > form input[type="submit"]:hover { color: var(--clr-accent); }
.header-search > form input[type="submit"]:before { content: ''; display: inline-block; width: 14px; height: 14px; background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%23888' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='11' cy='11' r='8'/%3E%3Cpath d='m21 21-4.35-4.35'/%3E%3C/svg%3E") center/contain no-repeat; }
.header-search > form input[type="submit"]:hover:before { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%234a90d9' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='11' cy='11' r='8'/%3E%3Cpath d='m21 21-4.35-4.35'/%3E%3C/svg%3E"); }

/* ── 第二行：导航 ── */
.header-nav {
  border-top: 1px solid var(--clr-border);
}
.header-nav__inner {
  max-width: var(--max-wide);
  margin: 0 auto;
  padding: 0 var(--space-lg);
  display: flex;
  align-items: center;
}

/* 主菜单（ul.primary-menu） */
.primary-menu {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  align-items: center;
  gap: 0;
  flex: 1;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.primary-menu::-webkit-scrollbar { display: none; }

.primary-menu > li > a {
  display: block;
  padding: 9px 14px;
  font-size: .88rem;
  font-weight: 500;
  color: var(--clr-text);
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: color .15s, border-color .15s;
}
.primary-menu > li > a:hover {
  color: var(--clr-accent);
  text-decoration: none;
}
.primary-menu > li.current-menu-item > a,
.primary-menu > li.current-page-ancestor > a {
  color: var(--clr-accent);
  border-bottom-color: var(--clr-accent);
}

/* 「更多」三点按钮 */
.nav-more-btn {
  flex-shrink: 0;
  background: none;
  border: none;
  cursor: pointer;
  padding: 9px 14px;
  color: var(--clr-text-muted);
  display: flex;
  align-items: center;
  font-size: 1.2rem;
  letter-spacing: 2px;
  transition: color .15s;
}
.nav-more-btn:hover { color: var(--clr-accent); }

/* 展开的完整菜单 */
.nav-overflow-panel {
  display: none;
  position: absolute;
  top: calc(100% + 4px);
  right: 0;
  background: var(--clr-bg);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  box-shadow: 0 8px 24px rgba(0,0,0,.1);
  min-width: 180px;
  z-index: 200;
}
.nav-overflow-panel.is-open { display: block; }
.nav-overflow-panel ul { list-style: none; padding: 8px 0; margin: 0; }
.nav-overflow-panel ul li a {
  display: block;
  padding: 9px 20px;
  font-size: .9rem;
  color: var(--clr-text);
  white-space: nowrap;
}
.nav-overflow-panel ul li a:hover {
  background: var(--clr-surface);
  color: var(--clr-accent);
  text-decoration: none;
}
.header-nav__more { position: relative; }

/* ═══════════════════════════════════════════════════
   4. 首页文章列表
   ═══════════════════════════════════════════════════ */
.posts-feed {
  max-width: var(--max-content);
  margin: 0 auto;
}

.post-card {
  display: grid;
  grid-template-columns: 1fr;
  grid-template-areas:
    "body"
    "meta";
  gap: 0;
  padding: var(--space-md) 10px;
  border-bottom: 1px solid var(--clr-border);
  border-radius: var(--radius);
  transition: background .15s, transform .15s;
  margin: 0 -10px;
}
.post-card:hover {
  background: var(--clr-surface);
  transform: translateY(-1px);
}
.post-card.has-thumb {
  grid-template-columns: 1fr 140px;
  grid-template-areas:
    "body thumb"
    "meta meta";
  gap: var(--space-md);
}

.post-card__body  { grid-area: body; }
.post-card__thumb { grid-area: thumb; align-self: center; }
.post-card__meta  { grid-area: meta; margin-top: var(--space-sm); }

.post-card__title {
  font-size: 1.05rem;
  font-weight: 800;
  margin-bottom: 6px;
}
.post-card__title a { color: var(--clr-heading); }
.post-card__title a:hover { color: var(--clr-accent); text-decoration: none; }

.post-card__excerpt {
  font-size: .9rem;
  color: var(--clr-text-muted);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-card__thumb img {
  width: 140px;
  height: 100px;
  object-fit: cover;
  border-radius: var(--radius);
}

.post-card__meta {
  font-size: .82rem;
  color: var(--clr-text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}
.post-card__date {
  color: var(--clr-text-muted);
  font-size: .78rem;
  text-decoration: none;
}
.post-card__date:hover {
  color: var(--clr-accent);
}
.post-card__cat {
  color: var(--clr-text-muted);
  font-size: .82rem;
  text-decoration: none;
}
.post-card__cat:hover {
  color: var(--clr-accent);
}
.post-card__sep { opacity: .4; }

/* 加载状态 */
#load-more-spinner {
  text-align: center;
  padding: var(--space-xl) 0;
  color: var(--clr-text-muted);
  font-size: .9rem;
}
.spinner-dot {
  display: inline-block;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--clr-accent);
  margin: 0 3px;
  animation: ldsx-bounce 1s infinite alternate;
}
.spinner-dot:nth-child(2) { animation-delay: .2s; }
.spinner-dot:nth-child(3) { animation-delay: .4s; }
@keyframes ldsx-bounce {
  from { transform: translateY(0); opacity:.4; }
  to   { transform: translateY(-8px); opacity:1; }
}

/* ═══════════════════════════════════════════════════
   5. 文章单页
   ═══════════════════════════════════════════════════ */
.post-category-path {
  font-size: .85rem;
  color: var(--clr-text-muted);
  margin-bottom: var(--space-md);
}
.post-category-path a { color: var(--clr-text-muted); }
.post-category-path a:hover { color: var(--clr-accent); }

.entry-header {
  text-align: center;
  max-width: var(--max-content);
  margin: 0 auto var(--space-xl);
  padding: var(--space-xl) 0 0;
}
.entry-title {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -.03em;
  line-height: 1.25;
  margin-bottom: var(--space-md);
}
.entry-meta {
  font-size: .85rem;
  color: var(--clr-text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px 16px;
}
.entry-meta a { color: var(--clr-text-muted); }
.entry-meta a:hover { color: var(--clr-accent); }

/* 文章内容 */
.entry-content {
  max-width: var(--max-content);
  margin: 0 auto;
  font-size: 1.125rem;
}
.entry-content h1 { font-size: 2rem; margin: 2.2em 0 .6em; scroll-margin-top: 120px; }
.entry-content h2 { font-size: 1.65rem; margin: 2em 0 .6em; scroll-margin-top: 120px; }
.entry-content h3 { font-size: 1.4rem; margin: 1.8em 0 .5em; scroll-margin-top: 120px; }
.entry-content h4 { font-size: 1.25rem; margin: 1.6em 0 .4em; scroll-margin-top: 120px; }
.entry-content p  { margin-bottom: 1.2em; }

.entry-content blockquote {
  border-left: 3px solid var(--clr-accent);
  margin: 1.6em 0;
  padding: .6em 1.2em;
  background: var(--clr-accent-bg);
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--clr-text-muted);
}
.entry-content pre {
  background: var(--clr-surface);
  color: var(--clr-text);
  padding: 1.2em 1.4em;
  border-radius: var(--radius);
  font-size: .88rem;
  line-height: 1.6;
  margin: 1.6em 0;
  border: 1px solid var(--clr-border);
}
.entry-content code:not(pre code) {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  padding: .1em .4em;
  border-radius: 3px;
  font-size: .88em;
}
.entry-content img { border-radius: var(--radius); margin: 1.4em auto; }
.entry-content table {
  width: 100%; border-collapse: collapse; margin: 1.4em 0;
}
.entry-content th, .entry-content td {
  border: 1px solid var(--clr-border);
  padding: .5em .8em;
  text-align: left;
  font-size: .9rem;
}
.entry-content th { background: var(--clr-surface); }
.entry-content hr {
  border: none;
  border-top: 1px solid var(--clr-border);
  margin: 2.4em 0;
}
.entry-content ul, .entry-content ol { margin-bottom: 1.2em; }
.entry-content li { margin-bottom: .4em; }

/* 标签 */
.entry-tags {
  max-width: var(--max-content);
  margin: var(--space-xl) auto var(--space-lg);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.entry-tags .tag {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  color: var(--clr-text-muted);
  padding: 3px 12px;
  border-radius: 999px;
  font-size: .82rem;
  text-decoration: none;
  transition: all .15s;
}
.entry-tags .tag:hover {
  background: var(--clr-accent-bg);
  border-color: var(--clr-accent-lt);
  color: var(--clr-accent);
}

/* ── 上下篇导航 ── */
.post-navigation {
  max-width: var(--max-content);
  margin: var(--space-xl) auto;
  border-top: 1px solid var(--clr-border);
  padding-top: var(--space-lg);
}
.post-navigation__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}
.post-nav-item { display: flex; flex-direction: column; gap: 6px; }
.post-nav-prev { text-align: left; }
.post-nav-next { text-align: right; }
.nav-label {
  font-size: .78rem;
  color: var(--clr-text-muted);
  text-transform: uppercase;
  letter-spacing: .08em;
}
.post-nav-item a { font-size: .95rem; font-weight: 600; color: var(--clr-heading); }
.post-nav-item a:hover { color: var(--clr-accent); text-decoration: none; }

/* ── 相关文章 ── */
.related-posts {
  max-width: var(--max-content);
  margin: var(--space-xl) auto;
}
.related-posts__title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: var(--space-md);
  color: var(--clr-text-muted);
  text-transform: uppercase;
  letter-spacing: .08em;
}
.related-posts__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}
.related-post-item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  text-decoration: none;
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: box-shadow .2s, border-color .2s;
}
.related-post-item:hover {
  box-shadow: 0 4px 16px rgba(0,115,170,.1);
  border-color: var(--clr-accent-lt);
}
.related-post-item__thumb img {
  width: 100%; height: 140px; object-fit: cover;
}
.related-post-item__info { padding: 10px 14px 14px; }
.related-post-item__title {
  font-size: .9rem; font-weight: 600;
  color: var(--clr-heading);
  display: -webkit-box;
  -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
  margin-bottom: 6px;
}
.related-post-item__excerpt {
  font-size: .8rem;
  color: var(--clr-heading);
  display: -webkit-box;
  -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
  margin: 0;
}
.related-post-item__date { font-size: .78rem; color: var(--clr-text-muted); }

/* ═══════════════════════════════════════════════════
   6. 评论区
   ═══════════════════════════════════════════════════ */
.comments-area {
  max-width: var(--max-content);
  margin: var(--space-xl) auto;
}
.comments-title { font-size: 1.1rem; font-weight: 700; margin-bottom: var(--space-lg); }

.comment-list { list-style: none; padding: 0; margin: 0 0 var(--space-xl); }
.comment-list .comment { padding: var(--space-md) 0; border-bottom: 1px solid var(--clr-border); }
.comment-list .children { list-style: none; padding-left: 40px; }
.comment-meta { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
.comment-author-name { font-weight: 600; font-size: .9rem; }
.comment-date { font-size: .8rem; color: var(--clr-text-muted); }
.comment-content { font-size: .93rem; line-height: 1.65; }
.comment-reply-link {
  font-size: .8rem; color: var(--clr-text-muted);
  margin-top: 6px; display: inline-block;
}
.comment-reply-link:hover { color: var(--clr-accent); }

/* 评论表单 */
.comment-form label { display: block; margin-bottom: 4px; font-size: .88rem; font-weight: 500; }
.comment-form input[type="text"],
.comment-form input[type="email"],
.comment-form input[type="url"],
.comment-form textarea {
  width: 100%;
  border: 1.5px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 8px 12px;
  font-size: .9rem;
  font-family: var(--font-sans);
  background: var(--clr-bg);
  color: var(--clr-text);
  transition: border-color .2s;
  margin-bottom: var(--space-md);
}
.comment-form input:focus,
.comment-form textarea:focus {
  outline: none;
  border-color: var(--clr-accent);
  box-shadow: 0 0 0 3px var(--clr-accent-bg);
}
.comment-form textarea { min-height: 120px; resize: vertical; }
.comment-form .submit {
  background: var(--clr-accent);
  color: #fff;
  border: none;
  padding: 9px 28px;
  border-radius: var(--radius);
  font-size: .9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background .2s;
}
.comment-form .submit:hover { background: var(--clr-accent-dk); }

/* ═══════════════════════════════════════════════════
   7. 归档 / 分类页
   ═══════════════════════════════════════════════════ */
.archive-header {
  max-width: var(--max-content);
  margin: 0 auto var(--space-xl);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--clr-border);
}
.archive-title { font-size: 1.6rem; font-weight: 800; }
.archive-description { color: var(--clr-text-muted); margin-top: 8px; font-size: .93rem; }

/* 分页 */
.pagination {
  display: flex;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-xl) 0;
}
.pagination a, .pagination span {
  display: inline-flex; align-items: center; justify-content: center;
  width: 36px; height: 36px;
  border: 1.5px solid var(--clr-border);
  border-radius: var(--radius);
  font-size: .9rem;
  color: var(--clr-text);
  text-decoration: none;
  transition: all .15s;
}
.pagination a:hover {
  border-color: var(--clr-accent);
  color: var(--clr-accent);
  background: var(--clr-accent-bg);
}
.pagination .current {
  background: var(--clr-accent);
  border-color: var(--clr-accent);
  color: #fff;
}

/* ═══════════════════════════════════════════════════
   8. 搜索页 Banner（header 下方搜索框）
   ═══════════════════════════════════════════════════ */
.search-page-banner {
  padding: var(--space-lg) var(--space-md);
}

.search-page-banner__inner {
  max-width: var(--max-content);
  margin: 0 auto;
}

/* 搜索表单（胶囊形，与首页 header 搜索框一致） */
.search-page__form {
  display: flex;
  align-items: center;
  max-width: 560px;
  margin: 0 auto;
  border: 1.5px solid var(--clr-text-muted);
  border-radius: 999px;
  transition: border-color .2s, box-shadow .2s;
}

.search-page__input {
  flex: 1;
  border: none;
  background: transparent;
  padding: 9px 14px;
  font-size: .9rem;
  color: var(--clr-text);
  outline: none;
  min-width: 0;
}

.search-page__input:focus {
  outline: none;
}

.search-page__input::placeholder {
  color: var(--clr-border);
}

.search-page__submit {
  flex-shrink: 0;
  border: none;
  background: transparent;
  padding: 7px 12px;
  cursor: pointer;
  color: var(--clr-text-muted);
  font-size: 0;
  transition: color .2s;
}

.search-page__submit:hover {
  color: var(--clr-accent);
}

/* 无结果（归档页和搜索页共用） */
.no-results {
  text-align: center;
  padding: var(--space-xl) 0;
}
.no-results h2 { font-size: 1.4rem; margin-bottom: var(--space-md); }
.no-results p  { color: var(--clr-text-muted); margin-bottom: var(--space-lg); }
.no-results__cats a { color: var(--clr-accent); text-decoration: none; }
.no-results__cats a:hover { text-decoration: underline; }

/* ═══════════════════════════════════════════════════
   9. 404 页
   ═══════════════════════════════════════════════════ */
.error-404 {
  text-align: center;
  padding: var(--space-xl) 0;
  max-width: 480px;
  margin: 0 auto;
}
.error-404__code {
  font-size: 7rem;
  font-weight: 900;
  color: var(--clr-border);
  line-height: 1;
  margin-bottom: var(--space-md);
}
.error-404__title { font-size: 1.6rem; margin-bottom: var(--space-md); }
.error-404__desc  { color: var(--clr-text-muted); margin-bottom: var(--space-lg); }
.btn {
  display: inline-flex; align-items: center;
  padding: 9px 24px;
  background: var(--clr-accent);
  color: #fff !important;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: .9rem;
  text-decoration: none !important;
  transition: background .2s;
}
.btn:hover { background: var(--clr-accent-dk); }

/* ═══════════════════════════════════════════════════
   10. 独立页 (page.php)
   ═══════════════════════════════════════════════════ */
.page-header { margin-bottom: var(--space-xl); }
.page-title {
  font-size: 2rem; font-weight: 800;
  max-width: var(--max-content); margin: 0 auto;
}

/* ═══════════════════════════════════════════════════
   11. 面包屑
   ═══════════════════════════════════════════════════ */
.breadcrumb {
  font-size: .83rem;
  color: var(--clr-text-muted);
  max-width: var(--max-content);
  margin: 0 auto var(--space-md);
}
.breadcrumb a { color: var(--clr-text-muted); }
.breadcrumb a:hover { color: var(--clr-accent); }
.breadcrumb .current { color: var(--clr-text); }

/* ═══════════════════════════════════════════════════
   10.5. 搜索图标（Header）
   ═══════════════════════════════════════════════════ */
.header-search {
  flex-shrink: 0;
}

.header-search-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  color: var(--clr-text-muted);
  border-radius: var(--radius);
  transition: color .2s, background-color .2s;
}

.header-search-icon:hover {
  color: var(--clr-accent);
  background-color: var(--clr-surface);
  text-decoration: none;
}

/* ═══════════════════════════════════════════════════
   11. 页脚
   ═══════════════════════════════════════════════════ */
.site-footer {
  border-top: 1px solid var(--clr-border);
  background: var(--clr-surface);
  padding: var(--space-xl) var(--space-lg) calc(var(--space-xl) + 4px);
  text-align: center;
  font-size: .85rem;
  color: var(--clr-text-muted);
  filter: brightness(0.96);
}
.site-footer a { color: var(--clr-text-muted); }
.site-footer a:hover { color: var(--clr-accent); }
.footer-copy   { margin-bottom: 6px; }
.footer-beian  { margin-bottom: 6px; }
.footer-custom { margin-top: var(--space-md); }

/* 页脚导航 */
.footer-nav { margin-bottom: var(--space-md); }
.footer-nav ul { list-style: none; padding: 0; display: flex; justify-content: center; flex-wrap: wrap; gap: 0; }
.footer-nav ul li a { padding: 4px 12px; font-size: .84rem; color: var(--clr-text-muted); }
.footer-nav ul li a:hover { color: var(--clr-accent); text-decoration: none; }

/* ═══════════════════════════════════════════════════
   13. 响应式
   ═══════════════════════════════════════════════════ */
@media (max-width: 768px) {
  :root { --base-size: 16px; }

  .header-top { padding: 14px var(--space-md); }

  .header-nav__inner { padding: 0 var(--space-md); }
  .primary-menu > li > a { padding: 8px 10px; font-size: .85rem; }

  .site-main { padding: var(--space-lg) var(--space-md); }

  .post-card.has-thumb {
    grid-template-columns: 1fr 100px;
  }
  .post-card__thumb img { width: 100px; height: 70px; }

  .entry-title { font-size: 1.5rem; }

  .post-navigation__inner { grid-template-columns: 1fr; }
  .post-nav-next { text-align: left; }

  .related-posts__grid { grid-template-columns: 1fr; }

  .error-404__code { font-size: 5rem; }
}

@media (max-width: 480px) {
  .entry-title { font-size: 1.3rem; }
}

/* ═══════════════════════════════════════════════════
   14. 辅助 / 可访问性
   ═══════════════════════════════════════════════════ */
.screen-reader-text {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
}
.skip-link {
  position: absolute;
  top: -999px; left: 8px;
  background: var(--clr-accent);
  color: #fff !important;
  padding: 6px 14px;
  border-radius: 0 0 var(--radius) var(--radius);
  font-size: .88rem;
  z-index: 9999;
  text-decoration: none;
}
.skip-link:focus { top: 0; }

/* Focus 样式统一 */
:focus-visible {
  outline: 2px solid var(--clr-accent);
  outline-offset: 2px;
}

/* 回到顶部按钮 */
.back-to-top {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1.5px solid var(--clr-border);
  background: var(--clr-bg);
  cursor: pointer;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 8px rgba(0,0,0,.1);
  z-index: 500;
  color: var(--clr-text-muted);
  transition: border-color .2s, color .2s;
}
.back-to-top:hover {
  border-color: var(--clr-accent);
  color: var(--clr-accent);
}
/* hidden 属性优先级补偿 */
.back-to-top[hidden] { display: none; }

/* ── 悬浮目录 ── */
.toc-widget {
  position: fixed;
  bottom: 72px;           /* 回到顶部按钮上方 */
  right: 24px;
  z-index: 500;
}
.toc-widget[hidden] { display: none; }

/* 目录触发按钮（与 back-to-top 风格完全一致） */
.toc-toggle {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: 50%;
  border: 1.5px solid var(--clr-border);
  background: var(--clr-bg);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 8px rgba(0,0,0,.1);
  color: var(--clr-text-muted);
  font-size: .72rem;
  line-height: 1;
  letter-spacing: 0;
  white-space: nowrap;
  overflow: hidden;
  transition: border-color .2s, color .2s;
}
.toc-toggle:hover,
.toc-toggle[aria-expanded="true"] {
  border-color: var(--clr-accent);
  color: var(--clr-accent);
}

/* 目录面板 */
.toc-panel {
  position: absolute;
  bottom: 48px;
  right: 0;
  width: 240px;
  max-height: 60vh;
  background: var(--clr-bg);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  box-shadow: 0 4px 20px rgba(0,0,0,.12);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transform-origin: bottom right;
  animation: toc-in .18s ease;
}
.toc-panel[hidden] { display: none; }

@keyframes toc-in {
  from { opacity: 0; transform: scale(.95); }
  to   { opacity: 1; transform: scale(1);   }
}

.toc-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  border-bottom: 1px solid var(--clr-border);
  flex-shrink: 0;
}
.toc-panel-title {
  font-size: .85rem;
  font-weight: 600;
  color: var(--clr-heading);
  letter-spacing: .04em;
}
.toc-close {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--clr-text-muted);
  font-size: .8rem;
  padding: 2px 4px;
  line-height: 1;
  border-radius: 3px;
  transition: color .15s;
}
.toc-close:hover { color: var(--clr-text); }

/* 目录列表 */
.toc-list {
  overflow-y: auto;
  overflow-x: hidden;
  padding: 8px 0;
  margin: 0;
  list-style: none;
  flex: 1;
}
.toc-list li { padding: 0; }
.toc-list a {
  display: block;
  padding: 5px 14px;
  font-size: .82rem;
  color: var(--clr-text-muted);
  text-decoration: none;
  line-height: 1.4;
  border-left: 2px solid transparent;
  transition: color .15s, border-color .15s, background .15s;
  word-break: break-all;
}
.toc-list a:hover {
  color: var(--clr-accent);
  background: var(--clr-accent-bg);
}
.toc-list a.is-active {
  color: var(--clr-accent);
  border-left-color: var(--clr-accent);
  background: var(--clr-accent-bg);
  font-weight: 500;
}




/* 二级缩进（h3） */
.toc-list .toc-h3 > a { padding-left: 26px; }
/* 三级缩进（h4） */
.toc-list .toc-h4 > a { padding-left: 38px; font-size: .78rem; }

/* 移动端：面板宽度自适应 */
@media (max-width: 480px) {
  .toc-panel { width: calc(100vw - 56px); right: 0; }
}

/* ═══════════════════════════════════════════════════
   15. Widget
   ═══════════════════════════════════════════════════ */
.widget { margin-bottom: var(--space-lg); }
.widget-title {
  font-size: 1rem; font-weight: 700;
  margin-bottom: var(--space-md);
  padding-bottom: 8px;
  border-bottom: 1px solid var(--clr-border);
}
.widget ul { list-style: none; padding: 0; }
.widget ul li { padding: 5px 0; border-bottom: 1px solid var(--clr-border); font-size: .9rem; }
.widget ul li:last-child { border-bottom: none; }

/* ═══════════════════════════════════════════════════
   16. 深色模式（prefers-color-scheme）
   ═══════════════════════════════════════════════════ */
@media (prefers-color-scheme: dark) {
  :root {
    --clr-bg:          #111111;
    --clr-surface:     #1c1c1c;
    --clr-border:      #2e2e2e;
    --clr-text:        #e5e7eb;
    --clr-text-muted:  #9ca3af;
    --clr-heading:     #f3f4f6;
    --clr-accent:      #4a90d9;
    --clr-accent-bg:   rgba(74, 144, 217, .08);
  }

  /* 搜索表单（深色模式） */
  .search-page__form {
    border-color: #6b7280;
  }

  .search-page__input {
    color: #e5e7eb;
  }

  .search-page__input::placeholder {
    color: #2e2e2e;
  }

  .search-page__submit {
    color: #888;
  }

  .search-page__submit:hover {
    color: var(--clr-accent);
  }

  .search-page__submit::before {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%23888' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='11' cy='11' r='8'/%3E%3Cpath d='m21 21-4.35-4.35'/%3E%3C/svg%3E");
  }

  .search-page__submit:hover::before {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%234a90d9' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='11' cy='11' r='8'/%3E%3Cpath d='m21 21-4.35-4.35'/%3E%3C/svg%3E");
  }

  /* 登录页面背景 */
  body.login { background: #111111; }

  /* 代码块（深色模式下微调，保持可读性） */
  .entry-content pre {
    background: #1e1e1e;
    color: #d4d4d4;
    border-color: #2e2e2e;
  }

  /* 分页器 */
  .pagination a,
  .pagination .current { color: #e5e7eb; border-color: #2e2e2e; }
}

/* ═══════════════════════════════════════════════════
   17. 打印样式
   ═══════════════════════════════════════════════════ */
@media print {
  .header-nav,
  .header-actions,
  .footer-inner,
  .back-to-top,
  .post-card__meta,
  .post-navigation,
  .related-posts,
  .comments-wrap,
  #comments { display: none !important; }

  body { background: #fff; color: #000; font-size: 12pt; }

  a { color: #000; text-decoration: underline; }
  a[href]::after { content: ' (' attr(href) ')'; font-size: .8em; }

  .site-main { max-width: 100%; margin: 0; padding: 0; }
  .entry-title { font-size: 18pt; margin-bottom: .5em; }
  .entry-content { font-size: 11pt; line-height: 1.5; }
  .entry-content h1 { font-size: 16pt; }
  .entry-content h2 { font-size: 14pt; }
  .entry-content h3 { font-size: 12pt; }
  .entry-content img { max-width: 100%; page-break-inside: avoid; }
  .entry-content blockquote { border-left: 2pt solid #000; }
}