/* ============================================================
   漫画站多页样式表
   布局：内容居中，最大宽度由 --maxw 控制
   ============================================================ */

:root {
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', 'Source Han Sans SC', 'WenQuanYi Micro Hei', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --primary: #8b5cf6;
  --primary-dark: #6d28d9;
  --primary-light: #c4b5fd;
  --accent: #fb7185;
  --bg: #faf7ff;
  --bg-alt: #f3eefe;
  --card-bg: #ffffff;
  --border: #e9e2f7;
  --text: #1f2937;
  --text-muted: #6b7280;
  --text-light: #9ca3af;
  --radius: 14px;
  --radius-lg: 22px;
  --shadow: 0 4px 14px rgba(139, 92, 246, 0.10);
  --shadow-lg: 0 12px 32px rgba(139, 92, 246, 0.22);
  --maxw: 1200px;
  --pad: 24px;
  --transition: 0.25s ease;
}

body.dark {
  --bg: #171326;
  --bg-alt: #211b36;
  --card-bg: #2a2344;
  --border: #3d3460;
  --text: #f3f0ff;
  --text-muted: #b9b0d6;
  --text-light: #b9b0d6;
  --primary-light: rgba(255,255,255,0.08);
  --shadow: 0 2px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.5);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
html, body { width: 100%; overflow-x: hidden; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  transition: background var(--transition), color var(--transition);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: 6px;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: var(--primary-dark); text-decoration: underline; }

/* ---------- 通用居中容器 ---------- */
.container,
.header-inner,
main,
#banner,
#banner .banner-slider {
  width: 100%;
  max-width: var(--maxw);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--pad);
  padding-right: var(--pad);
}

#banner { padding-top: 24px; }
#banner .banner-slider { padding-left: 0; padding-right: 0; }

main {
  padding-top: 8px;
  padding-bottom: 60px;
}
main > section {
  margin-top: 48px;
  margin-bottom: 48px;
}
main > section:first-child { margin-top: 16px; }

/* ---------- 字体层级 ---------- */
h1, h2, h3, h4 {
  color: var(--text);
  line-height: 1.3;
  margin: 0 0 16px;
  font-weight: 700;
}

h1 {
  font-size: 2.1rem;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
h2 {
  font-size: 1.6rem;
  position: relative;
  padding-left: 16px;
}
h2::before {
  content: "";
  position: absolute;
  left: 0; top: 50%;
  transform: translateY(-50%);
  width: 5px; height: 1.1em;
  background: linear-gradient(180deg, var(--primary), var(--accent));
  border-radius: 3px;
}
h3 { font-size: 1.25rem; margin-top: 28px; }
h4 { font-size: 1.05rem; color: var(--text-muted); }

p { margin: 0 0 16px; color: var(--text); }
ul, ol { padding-left: 1.4em; margin: 0 0 16px; }
li { margin: 6px 0; }
strong { color: var(--text); font-weight: 600; }

code {
  background: var(--primary-light);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.9em;
}

blockquote {
  margin: 20px 0;
  padding: 16px 20px;
  border-left: 4px solid var(--primary);
  background: var(--bg-alt);
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--text-muted);
}

/* ---------- Header ---------- */
#site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.85);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition), border-color var(--transition);
  width: 100%;
}
body.dark #site-header { background: rgba(15,23,42,0.85); }

.header-inner {
  padding-top: 12px;
  padding-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 20px;
  position: relative;
  flex-wrap: nowrap;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 700;
  font-size: 1.15rem;
  text-decoration: none !important;
  flex-shrink: 0;
}
.logo svg { border-radius: 10px; }
.logo h1 {
  font-size: 1.15rem;
  margin: 0;
  color: var(--text);
  -webkit-text-fill-color: var(--text);
  background: none;
  white-space: nowrap;
}

/* ---------- 主导航：无论 AI 用什么结构，都强制横排 ---------- */
#main-nav {
  flex: 1;
  min-width: 0;
  display: flex !important;
  flex-direction: row !important;
  flex-wrap: wrap !important;
  align-items: center !important;
  gap: 4px !important;
}

#main-nav ul,
#main-nav ol {
  display: flex !important;
  flex-direction: row !important;
  flex-wrap: wrap !important;
  align-items: center !important;
  gap: 2px !important;
  list-style: none !important;
  margin: 0 !important;
  padding: 0 !important;
}

#main-nav li {
  display: inline-block !important;
  margin: 0 !important;
  padding: 0 !important;
  flex-shrink: 0 !important;
  list-style: none !important;
}

/* 干掉所有圆点和 ::before / ::after / ::marker */
#main-nav li::before,
#main-nav li::after,
#main-nav li::marker,
#main-nav > a::before,
#main-nav > a::after,
#main-nav ul::before,
#main-nav ul::after {
  content: none !important;
  display: none !important;
}

#main-nav a {
  display: inline-block !important;
  padding: 8px 12px;
  border-radius: 10px;
  color: var(--text-muted);
  font-size: 0.92rem;
  font-weight: 500;
  transition: all var(--transition);
  white-space: nowrap;
  text-decoration: none;
}
#main-nav a:hover {
  color: var(--primary);
  background: var(--primary-light);
  text-decoration: none;
}
#main-nav a[aria-current="page"] {
  color: var(--primary);
  background: var(--primary-light);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

#search-form {
  display: flex;
  align-items: center;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 999px;
  overflow: hidden;
  transition: border-color var(--transition);
}
#search-form:focus-within { border-color: var(--primary); }
#search-input {
  border: none;
  outline: none;
  padding: 8px 14px;
  font-size: 0.88rem;
  background: transparent;
  color: var(--text);
  width: 160px;
  font-family: inherit;
}
#search-input::placeholder { color: var(--text-light); }
#search-form button {
  border: none;
  padding: 8px 14px;
  background: var(--primary);
  color: #fff;
  font-size: 0.88rem;
  cursor: pointer;
  font-family: inherit;
  transition: background var(--transition);
}
#search-form button:hover { background: var(--primary-dark); }

#theme-toggle, #menu-toggle {
  border: 1px solid var(--border);
  background: var(--bg-alt);
  color: var(--text);
  width: 38px; height: 38px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
  flex-shrink: 0;
}
#theme-toggle:hover, #menu-toggle:hover {
  border-color: var(--primary);
  color: var(--primary);
}
#menu-toggle { display: none; }

main > nav:not(#breadcrumb) { display: none !important; }

/* ---------- Banner ---------- */
.banner-slider {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background: var(--bg-alt);
  min-height: 200px;
}
.banner-slide {
  display: none;
  animation: fadeIn 0.6s ease;
}
.banner-slide.active { display: block; }
.banner-slide img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 0;
  aspect-ratio: 3 / 1;
  object-fit: cover;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

.banner-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 14px;
}
.banner-dots .dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  border: none;
  background: var(--border);
  cursor: pointer;
  transition: all var(--transition);
}
.banner-dots .dot.active {
  background: var(--primary);
  width: 24px;
  border-radius: 6px;
}

/* ---------- 面包屑 ---------- */
#breadcrumb {
  margin: 20px auto 0;
  max-width: var(--maxw);
  padding: 0 var(--pad);
  font-size: 0.9rem;
  color: var(--text-muted);
}
#breadcrumb ol {
  display: flex;
  gap: 8px;
  list-style: none;
  padding: 0; margin: 0;
  flex-wrap: wrap;
}
#breadcrumb li:not(:last-child)::after {
  content: "/";
  margin-left: 8px;
  color: var(--text-light);
}
#breadcrumb a { color: var(--primary); }
#breadcrumb a:hover { color: var(--primary-dark); }

/* ---------- 通用文字块 ---------- */
.lead {
  font-size: 1.08rem;
  color: var(--text-muted);
  line-height: 1.85;
  margin-bottom: 24px;
}

/* ---------- 内容卡片 ---------- */
.article-item, .news-item {
  padding: 20px 22px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-bottom: 16px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.article-item:hover, .news-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}
.article-item h3, .news-item h3 {
  margin: 0 0 8px;
  font-size: 1.15rem;
}
.article-item h3 a, .news-item h3 a {
  color: var(--text);
  text-decoration: none;
}
.article-item h3 a:hover, .news-item h3 a:hover {
  color: var(--primary);
  text-decoration: none;
}
.meta {
  font-size: 0.85rem;
  color: var(--text-light);
  margin: 0 0 10px;
}
.summary {
  color: var(--text-muted);
  margin: 0 0 10px;
}
.read-more {
  display: inline-block;
  color: var(--primary);
  font-weight: 500;
  font-size: 0.92rem;
}
.read-more::after { content: " →"; }
.read-more:hover { text-decoration: none; }

/* ---------- 栏目入口：强制横排网格 ---------- */
.entry-list {
  display: grid !important;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)) !important;
  gap: 16px !important;
  list-style: none !important;
  padding: 0;
  margin: 0;
  width: 100%;
}
.entry-list > li {
  display: block !important;
  margin: 0 !important;
  padding: 0 !important;
  list-style: none !important;
}
.entry-list > li::before,
.entry-list > li::marker,
.entry-list > li::after {
  content: none !important;
  display: none !important;
}
.entry-list > li > a,
.entry-list a {
  display: block;
  padding: 20px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  color: var(--text);
  text-decoration: none;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  height: 100%;
}
.entry-list > li > a:hover,
.entry-list a:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
  text-decoration: none;
}
.entry-list h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
  color: var(--primary);
}
.entry-list p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* ---------- 网站地图：强制横排多列 ---------- */
#sitemap ul {
  display: grid !important;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)) !important;
  gap: 10px 20px !important;
  list-style: none !important;
  padding: 0;
  margin: 0;
}
#sitemap li {
  margin: 0 !important;
  padding: 0 !important;
  list-style: none !important;
}
#sitemap li::before,
#sitemap li::marker,
#sitemap li::after {
  content: none !important;
  display: none !important;
}
#sitemap a {
  display: block;
  padding: 10px 16px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 0.92rem;
  transition: all var(--transition);
}
#sitemap a:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  transform: translateY(-2px);
  text-decoration: none;
}

/* ---------- 友情链接：强制横排胶囊 ---------- */
#links ul {
  display: flex !important;
  flex-direction: row !important;
  flex-wrap: wrap !important;
  gap: 12px !important;
  list-style: none !important;
  padding: 0;
  margin: 0;
}
#links li {
  margin: 0 !important;
  padding: 0 !important;
  list-style: none !important;
}
#links li::before,
#links li::marker,
#links li::after {
  content: none !important;
  display: none !important;
}
#links a {
  display: inline-block;
  padding: 8px 18px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: all var(--transition);
}
#links a:hover {
  border-color: var(--primary);
  color: var(--primary);
  text-decoration: none;
}

/* ---------- 漫画卡片 ---------- */
.comic-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 18px;
  list-style: none;
  padding: 0;
  margin: 0;
}
.comic-card {
  display: flex;
  flex-direction: column;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  text-decoration: none;
  color: var(--text);
}
.comic-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
  text-decoration: none;
}
.comic-cover {
  width: 100%;
  aspect-ratio: 3 / 4;
  overflow: hidden;
  background: linear-gradient(135deg, var(--primary-light), var(--bg-alt));
}
.comic-cover img {
  width: 100% !important;
  height: 100% !important;
  object-fit: cover;
  border-radius: 0;
  display: block;
  transition: transform 0.4s ease;
}
.comic-card:hover .comic-cover img { transform: scale(1.05); }
.comic-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  margin: 10px 12px 4px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.comic-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  padding: 0 12px 12px;
}
.tag {
  display: inline-block;
  padding: 2px 10px;
  font-size: 0.72rem;
  border-radius: 999px;
  background: var(--primary-light);
  color: var(--primary-dark);
  font-weight: 500;
}
body.dark .tag { color: var(--primary-light); }

/* ---------- 角色卡片 ---------- */
.character-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 20px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: all var(--transition);
}
.character-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}
.character-card img {
  width: 100px; height: 100px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--primary);
  margin-bottom: 12px;
}
.character-card h3 {
  margin: 0 0 6px;
  font-size: 1.05rem;
  color: var(--text);
}
.character-card .role {
  color: var(--primary);
  font-size: 0.85rem;
  margin: 0 0 8px;
}
.character-card p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin: 0;
  line-height: 1.6;
}

/* ---------- 排行榜 ---------- */
.ranking-list {
  list-style: none;
  padding: 0;
  margin: 0;
  counter-reset: rank;
}
.ranking-list li {
  counter-increment: rank;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 10px;
  transition: all var(--transition);
}
.ranking-list li:hover {
  border-color: var(--primary);
  transform: translateX(3px);
  box-shadow: var(--shadow);
}
.ranking-list li::before {
  content: counter(rank);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px; height: 32px;
  border-radius: 8px;
  background: var(--primary-light);
  color: var(--primary-dark);
  font-weight: 700;
  flex-shrink: 0;
}
.ranking-list li:nth-child(1)::before { background: #fbbf24; color: #fff; }
.ranking-list li:nth-child(2)::before { background: #cbd5e1; color: #fff; }
.ranking-list li:nth-child(3)::before { background: #fb923c; color: #fff; }

/* ---------- 更新列表 ---------- */
.update-list { list-style: none; padding: 0; margin: 0; }
.update-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 8px;
  transition: all var(--transition);
}
.update-list li:hover {
  background: var(--primary-light);
  border-color: var(--primary);
}
.update-list .title { font-weight: 500; color: var(--text); }
.update-list .chapter { color: var(--text-muted); font-size: 0.9rem; }
.update-list .time { color: var(--text-light); font-size: 0.85rem; flex-shrink: 0; }

/* ---------- 分类网格 ---------- */
.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: 12px;
  list-style: none !important;
  padding: 0;
  margin: 0;
}
.category-grid li {
  margin: 0 !important;
  padding: 0 !important;
  list-style: none !important;
}
.category-grid li::before,
.category-grid li::marker {
  content: none !important;
  display: none !important;
}
.category-grid a {
  display: block;
  padding: 16px 10px;
  text-align: center;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-weight: 500;
  transition: all var(--transition);
}
.category-grid a:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  transform: translateY(-2px);
  text-decoration: none;
  box-shadow: var(--shadow-lg);
}

/* ---------- 评论 ---------- */
.comment-list { list-style: none; padding: 0; margin: 0; }
.comment-list li {
  padding: 16px 18px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 10px;
}
.comment-list .user { color: var(--primary); font-weight: 600; margin-right: 8px; }
.comment-list .time { color: var(--text-light); font-size: 0.85rem; }
.comment-list p { margin: 8px 0 0; color: var(--text); }

/* ---------- 按钮 ---------- */
.btn, .download-btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 999px;
  background: var(--primary);
  color: #fff !important;
  font-weight: 600;
  text-decoration: none !important;
  transition: all var(--transition);
  box-shadow: 0 6px 20px rgba(124,58,237,0.25);
  border: none;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.95rem;
}
.btn:hover, .download-btn:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(124,58,237,0.35);
}
.btn-secondary {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text) !important;
  box-shadow: none;
}
.btn-secondary:hover {
  border-color: var(--primary);
  color: var(--primary) !important;
}

/* ---------- FAQ ---------- */
details {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 10px;
  overflow: hidden;
  transition: border-color var(--transition);
}
details[open] { border-color: var(--primary); }
details summary {
  cursor: pointer;
  padding: 16px 48px 16px 20px;
  font-weight: 600;
  color: var(--text);
  list-style: none;
  position: relative;
  transition: background var(--transition);
}
details summary::-webkit-details-marker { display: none; }
details summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.3rem;
  color: var(--primary);
}
details[open] summary::after { content: "−"; }
details summary:hover { background: var(--primary-light); }
details p {
  margin: 0;
  padding: 0 20px 18px;
  color: var(--text-muted);
  line-height: 1.8;
}

/* ============================================================
   Footer
   ============================================================ */
#site-footer {
  width: 100%;
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  padding: 48px 0 20px;
  margin-top: 60px;
  color: var(--text-muted);
  text-align: center;
}

#site-footer > *,
#site-footer .footer-inner,
#site-footer .footer-cols,
#site-footer .footer-content,
#site-footer .footer-grid,
#site-footer .footer-top,
#site-footer .footer-main,
#site-footer .footer-bottom,
#site-footer .footer-meta,
#site-footer .footer-copyright,
#site-footer .copyright,
#site-footer .footer-info,
#site-footer .footer-links,
#site-footer .footer-links-wrap,
#site-footer .footer-contact,
#site-footer .footer-social {
  width: 100%;
  max-width: var(--maxw);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--pad);
  padding-right: var(--pad);
  box-sizing: border-box;
}

#site-footer .footer-inner,
#site-footer .footer-cols,
#site-footer .footer-content,
#site-footer .footer-grid,
#site-footer .footer-top,
#site-footer .footer-main {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1.2fr 1fr;
  gap: 40px;
  align-items: start;
  text-align: left;
}

.footer-col h3 {
  color: var(--text);
  font-size: 1rem;
  margin-bottom: 14px;
}
.footer-col ul { list-style: none; padding: 0; margin: 0; }
.footer-col li { margin: 8px 0; font-size: 0.9rem; color: var(--text-light); }
.footer-col a { color: var(--text-muted); }
.footer-col a:hover { color: var(--primary); }
.footer-col p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.8;
}

#site-footer .footer-bottom,
#site-footer .footer-meta,
#site-footer .footer-copyright,
#site-footer .copyright,
#site-footer .footer-info {
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--text-light);
  text-align: center;
}

#site-footer { text-align: center; }
#site-footer .footer-inner,
#site-footer .footer-cols,
#site-footer .footer-content,
#site-footer .footer-grid,
#site-footer .footer-top,
#site-footer .footer-main { text-align: left; }
#site-footer .footer-col { text-align: left; }

/* ---------- 返回顶部 ---------- */
#back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 44px; height: 44px;
  border-radius: 50%;
  border: none;
  background: var(--primary);
  color: #fff;
  font-size: 1.2rem;
  cursor: pointer;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition);
  z-index: 99;
}
#back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
#back-to-top:hover { background: var(--primary-dark); }

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  :root { --pad: 18px; }
  #site-footer .footer-inner,
  #site-footer .footer-cols,
  #site-footer .footer-content,
  #site-footer .footer-grid,
  #site-footer .footer-top,
  #site-footer .footer-main {
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
  }
  #main-nav { display: none; }
  #main-nav.open {
    display: flex !important;
    flex-direction: column !important;
    align-items: stretch !important;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--card-bg);
    border-bottom: 1px solid var(--border);
    padding: 12px;
    box-shadow: var(--shadow-lg);
    max-width: 100%;
    z-index: 200;
  }
  #main-nav.open ul {
    flex-direction: column !important;
    align-items: stretch !important;
    gap: 4px !important;
  }
  #main-nav.open a { display: block; }
  #menu-toggle { display: flex; }
}

@media (max-width: 640px) {
  :root { --pad: 16px; }
  h1 { font-size: 1.65rem; }
  h2 { font-size: 1.35rem; }
  .header-inner { gap: 8px; padding-top: 10px; padding-bottom: 10px; }
  #search-form { display: none; }
  .entry-list { grid-template-columns: 1fr !important; }
  .comic-grid { grid-template-columns: repeat(3, 1fr); gap: 10px; }
  .category-grid { grid-template-columns: repeat(3, 1fr); }
  #site-footer .footer-inner,
  #site-footer .footer-cols,
  #site-footer .footer-content,
  #site-footer .footer-grid,
  #site-footer .footer-top,
  #site-footer .footer-main {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  #sitemap ul { grid-template-columns: repeat(2, 1fr) !important; }
  main > section { margin-top: 32px; margin-bottom: 32px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}