```css
/* ============================================================
   jmcomic - 漫画迷收藏夹 | 完整样式表
   风格：暖色纸感 + 深蓝海洋 + 现代质感
   包含：响应式、暗色模式、动画、毛玻璃、渐变卡片
   ============================================================ */

/* ---------- 颜色与主题变量 ---------- */
:root {
  --bg-primary: #F8F5F0;
  --bg-secondary: #FFFFFF;
  --bg-card: #FFFFFF;
  --text-strong: #1A2B3C;
  --text-body: #243447;
  --text-muted: #3E4E5E;
  --text-link: #0F5B7A;
  --text-link-hover: #093C52;
  --border-light: #D8D0C5;
  --brand-accent: #2D6A8F;
  --brand-accent-dark: #124263;
  --button-bg: #1B4A6B;
  --button-text: #FFFFFF;
  --footer-bg: #16222E;
  --footer-text: #D9E2EC;
  --footer-heading: #FFFFFF;
  --tag-bg: #E3E9EF;
  --nav-bg: rgba(255, 255, 255, 0.92);
  --shadow: 0 8px 20px rgba(0, 0, 0, 0.05);
  --code-bg: #EFF3F8;
  --gradient-hero: linear-gradient(135deg, #E8F0F8 0%, #F8F5F0 50%, #FDF8F2 100%);
  --gradient-card: linear-gradient(145deg, #FFFFFF 0%, #F5F2ED 100%);
  --gradient-badge: linear-gradient(135deg, #2D6A8F, #4A9BC7);
  --hover-lift: translateY(-6px);
  --transition-base: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  --glow-accent: 0 4px 20px rgba(45, 106, 143, 0.15);
  --font-display: 'Georgia', 'Noto Serif SC', serif;
  --font-body: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', 'Noto Sans', 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

[data-theme="dark"] {
  --bg-primary: #12181F;
  --bg-secondary: #1B242D;
  --bg-card: #1C2732;
  --text-strong: #F0F6FC;
  --text-body: #E5EAF0;
  --text-muted: #B4C2D0;
  --text-link: #8BC1E0;
  --text-link-hover: #A9D4F0;
  --border-light: #34495E;
  --brand-accent: #6FA8C7;
  --brand-accent-dark: #8FC1E0;
  --button-bg: #3D7EA6;
  --button-text: #FFFFFF;
  --footer-bg: #0B1016;
  --footer-text: #C8D6E2;
  --footer-heading: #FFFFFF;
  --tag-bg: #2E3D4A;
  --nav-bg: rgba(18, 24, 32, 0.95);
  --shadow: 0 6px 16px rgba(0, 0, 0, 0.4);
  --code-bg: #25313c;
  --gradient-hero: linear-gradient(135deg, #1B242D 0%, #12181F 50%, #1A2A38 100%);
  --gradient-card: linear-gradient(145deg, #1C2732 0%, #16222E 100%);
  --gradient-badge: linear-gradient(135deg, #6FA8C7, #4A7A9B);
  --hover-lift: translateY(-6px);
  --glow-accent: 0 4px 20px rgba(139, 193, 224, 0.2);
}

/* ---------- 基础重置 ---------- */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  background: var(--bg-primary);
  color: var(--text-body);
  font-family: var(--font-body);
  line-height: 1.7;
  font-size: 16px;
  transition: background 0.3s ease, color 0.3s ease;
  overflow-x: hidden;
}

/* ---------- 排版 ---------- */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-strong);
  font-weight: 700;
  line-height: 1.4;
  font-family: var(--font-display);
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2rem, 5vw, 2.8rem);
  margin-bottom: 0.75rem;
  background: linear-gradient(120deg, var(--text-strong) 0%, var(--brand-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: inline-block;
}

h2 {
  font-size: clamp(1.6rem, 3.5vw, 2rem);
  margin: 2.5rem 0 1.2rem;
  padding-bottom: 0.6rem;
  border-bottom: 3px solid transparent;
  border-image: linear-gradient(90deg, var(--brand-accent), transparent) 1;
  position: relative;
}

h2::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background: var(--brand-accent);
  border-radius: 3px;
  margin-top: 0.5rem;
}

h3 {
  font-size: clamp(1.2rem, 2.5vw, 1.45rem);
  margin: 1.5rem 0 0.75rem;
}

h4 {
  font-size: 1.1rem;
  margin: 1.2rem 0 0.5rem;
  color: var(--text-strong);
}

p {
  margin-bottom: 1rem;
  color: var(--text-body);
  line-height: 1.8;
}

a {
  color: var(--text-link);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease, text-decoration 0.2s ease;
}

a:hover {
  color: var(--text-link-hover);
  text-decoration: underline;
}

ul, ol {
  padding-left: 1.8rem;
  margin-bottom: 1rem;
}

li {
  margin-bottom: 0.4rem;
  color: var(--text-body);
}

strong {
  color: var(--text-strong);
  font-weight: 700;
}

blockquote {
  position: relative;
  overflow: hidden;
  transition: var(--transition-base);
}

blockquote:hover {
  transform: var(--hover-lift);
  box-shadow: var(--glow-accent);
}

/* ---------- 容器与布局 ---------- */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}

.section {
  padding: 3rem 0;
  position: relative;
}

/* 分段背景装饰 */
.section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-light), transparent);
}

/* ---------- 顶部导航（毛玻璃） ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--nav-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border-light);
  transition: box-shadow 0.3s ease;
}

.site-header:hover {
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.08);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.8rem 0;
  gap: 1rem;
}

.logo a {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--text-strong);
  letter-spacing: -0.5px;
  display: flex;
  align-items: center;
  gap: 0.3rem;
  transition: transform 0.3s ease;
}

.logo a:hover {
  transform: scale(1.02);
  text-decoration: none;
}

.logo span {
  color: var(--brand-accent);
  font-weight: 600;
}

.nav-links {
  display: flex;
  gap: 1.8rem;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--text-body);
  font-weight: 500;
  padding: 0.4rem 0.2rem;
  position: relative;
  transition: color 0.3s ease;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--brand-accent);
  transition: width 0.3s ease;
  border-radius: 2px;
}

.nav-links a:hover {
  color: var(--brand-accent);
  text-decoration: none;
}

.nav-links a:hover::after {
  width: 100%;
}

.theme-toggle {
  background: var(--tag-bg);
  border: 1px solid var(--border-light);
  color: var(--text-strong);
  font-size: 1.3rem;
  border-radius: 40px;
  padding: 0.3rem 1.1rem;
  cursor: pointer;
  font-weight: 600;
  transition: var(--transition-base);
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.theme-toggle:hover {
  transform: rotate(15deg) scale(1.05);
  background: var(--brand-accent);
  color: #fff;
  border-color: var(--brand-accent);
}

.menu-toggle {
  display: none;
  background: none;
  border: 0;
  font-size: 2rem;
  color: var(--text-strong);
  cursor: pointer;
  transition: transform 0.3s ease;
}

.menu-toggle:hover {
  transform: scale(1.1);
}

/* 移动端导航 */
@media (max-width: 900px) {
  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--nav-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow);
    gap: 0.8rem;
    text-align: center;
  }

  .nav-links.open {
    display: flex;
    animation: slideDown 0.3s ease;
  }

  .menu-toggle {
    display: block;
  }

  .nav-wrap {
    flex-wrap: wrap;
  }
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- Hero 区域 ---------- */
.hero {
  background: var(--gradient-hero);
  padding: 4rem 0;
  border-bottom: 1px solid var(--border-light);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--brand-accent) 0%, transparent 70%);
  opacity: 0.08;
  border-radius: 50%;
  pointer-events: none;
}

.hero-grid {
  display: flex;
  align-items: center;
  gap: 3rem;
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
}

.hero-content {
  flex: 2 1 400px;
}

.hero-image {
  flex: 1 1 280px;
  text-align: center;
  position: relative;
}

.hero-image svg {
  transition: transform 0.5s ease, box-shadow 0.5s ease;
  box-shadow: 0 20px 40px rgba(45, 106, 143, 0.15);
}

.hero-image svg:hover {
  transform: translateY(-10px) rotate(5deg);
  box-shadow: 0 30px 60px rgba(45, 106, 143, 0.25);
}

.hero-badge {
  display: inline-block;
  background: var(--gradient-badge);
  color: #fff;
  padding: 0.4rem 1.4rem;
  border-radius: 30px;
  font-size: 0.9rem;
  margin-bottom: 1.2rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  box-shadow: 0 4px 15px rgba(45, 106, 143, 0.3);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% {
    box-shadow: 0 4px 15px rgba(45, 106, 143, 0.3);
  }
  50% {
    box-shadow: 0 4px 25px rgba(45, 106, 143, 0.5);
  }
}

.hero-content p:first-of-type {
  font-size: 1.2rem;
  line-height: 1.8;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-block;
  background: var(--button-bg);
  color: var(--button-text);
  padding: 0.7rem 2rem;
  border-radius: 50px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: var(--transition-base);
  box-shadow: 0 4px 15px rgba(27, 74, 107, 0.3);
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s ease;
}

.btn:hover {
  background: var(--brand-accent-dark);
  color: #fff;
  text-decoration: none;
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(27, 74, 107, 0.4);
}

.btn:hover::before {
  left: 100%;
}

.btn:active {
  transform: translateY(-1px);
}

/* ---------- 卡片系统 ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.card {
  background: var(--gradient-card);
  border-radius: 16px;
  padding: 2rem 1.8rem;
  box-shadow: var(--shadow);
  border: 1px solid var(--border-light);
  transition: var(--transition-base);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-badge);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.card:hover {
  transform: var(--hover-lift);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
  border-color: var(--brand-accent);
}

.card:hover::before {
  transform: scaleX(1);
}

.card h3 {
  margin-top: 0.5rem;
  color: var(--text-strong);
  font-size: 1.3rem;
}

.card p {
  color: var(--text-body);
  font-size: 0.95rem;
}

.card a {
  color: var(--text-link);
  font-weight: 600;
  transition: color 0.3s ease;
}

.card a:hover {
  color: var(--brand-accent);
}

/* 卡片图标装饰 */
.card h3:first-child {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

/* ---------- 文章列表 ---------- */
.article-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
  margin: 2.5rem 0;
}

.article-item {
  background: var(--gradient-card);
  padding: 1.8rem;
  border-radius: 14px;
  box-shadow: var(--shadow);
  border-left: 5px solid var(--brand-accent);
  transition: var(--transition-base);
  position: relative;
  overflow: hidden;
}

.article-item::after {
  content: '';
  position: absolute;
  bottom: 0;
  right: 0;
  width: 100px;
  height: 100px;
  background: radial-gradient(circle, var(--brand-accent) 0%, transparent 70%);
  opacity: 0.05;
  border-radius: 50%;
  pointer-events: none;
}

.article-item:hover {
  transform: var(--hover-lift);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.1);
  border-left-color: var(--brand-accent-dark);
}

.article-item .date {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.6rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.article-item .date::before {
  content: '📅';
  font-size: 1rem;
}

.article-item h3 {
  margin: 0.3rem 0;
  font-size: 1.25rem;
  transition: color 0.3s ease;
}

.article-item:hover h3 {
  color: var(--brand-accent);
}

.article-item p {
  font-size: 0.95rem;
  margin-bottom: 1rem;
}

.read-more {
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  transition: gap 0.3s ease;
}

.read-more::after {
  content: '→';
  transition: transform 0.3s ease;
}

.read-more:hover::after {
  transform: translateX(5px);
}

/* ---------- FAQ 手风琴 ---------- */
.faq-item {
  background: var(--gradient-card);
  border-radius: 12px;
  padding: 1.3rem 1.8rem;
  margin-bottom: 1rem;
  border: 1px solid var(--border-light);
  transition: var(--transition-base);
  overflow: hidden;
}

.faq-item:hover {
  border-color: var(--brand-accent);
  box-shadow: var(--glow-accent);
  transform: translateX(5px);
}

.faq-question {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text-strong);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  user-select: none;
  transition: color 0.3s ease;
}

.faq-question:hover {
  color: var(--brand-accent);
}

.faq-toggle {
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--brand-accent);
  transition: transform 0.3s ease;
  min-width: 30px;
  text-align: center;
  background: var(--tag-bg);
  border-radius: 50%;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

.faq-answer {
  margin-top: 1rem;
  color: var(--text-body);
  padding-top: 1rem;
  border-top: 1px solid var(--border-light);
  animation: fadeIn 0.3s ease;
  line-height: 1.8;
}

.faq-answer.hidden {
  display: none;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(-5px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- HowTo 教程块 ---------- */
.howto-container {
  background: var(--gradient-card);
  padding: 2.5rem;
  border-radius: 20px;
  position: relative;
}

.howto-container h3 {
  color: var(--brand-accent);
  margin-top: 2rem;
  font-size: 1.3rem;
}

.howto-container h3:first-child {
  margin-top: 0;
}

.howto-container ul li::marker,
.howto-container ol li::marker {
  color: var(--brand-accent);
  font-weight: bold;
}

.howto-container ol {
  counter-reset: custom-counter;
}

.howto-container ol li {
  counter-increment: custom-counter;
  position: relative;
  padding-left: 0.5rem;
}

.howto-container ol li::before {
  content: counter(custom-counter);
  color: var(--brand-accent);
  font-weight: bold;
  margin-right: 0.5rem;
}

.howto-container p {
  margin-bottom: 1rem;
}

/* ---------- 表格 ---------- */
.table-wrap {
  overflow-x: auto;
  border-radius: 12px;
  box-shadow: var(--shadow);
  margin: 2rem 0;
}

table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  background: var(--bg-card);
  border-radius: 12px;
  overflow: hidden;
}

th, td {
  padding: 1rem 1.2rem;
  border: 1px solid var(--border-light);
  text-align: left;
  transition: background 0.3s ease;
}

th {
  background: var(--tag-bg);
  color: var(--text-strong);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.3px;
}

td {
  color: var(--text-body);
}

tbody tr:hover {
  background: rgba(45, 106, 143, 0.05);
}

/* ---------- 页脚 ---------- */
.site-footer {
  background: var(--footer-bg);
  color: var(--footer-text);
  padding: 4rem 0 1.5rem;
  margin-top: 4rem;
  position: relative;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--brand-accent), var(--brand-accent-dark), var(--brand-accent));
  background-size: 200% 100%;
  animation: gradientMove 3s linear infinite;
}

@keyframes gradientMove {
  0% {
    background-position: 0% 0;
  }
  100% {
    background-position: 200% 0;
  }
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2.5rem;
  margin-bottom: 2rem;
}

.site-footer h4 {
  color: var(--footer-heading);
  margin-bottom: 1.2rem;
  font-size: 1.1rem;
  position: relative;
  padding-bottom: 0.5rem;
}

.site-footer h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 30px;
  height: 2px;
  background: var(--brand-accent);
}

.site-footer a {
  color: var(--footer-text);
  opacity: 0.9;
  transition: all 0.3s ease;
}

.site-footer a:hover {
  color: #fff;
  text-decoration: none;
  opacity: 1;
  padding-left: 5px;
}

.site-footer p {
  color: var(--footer-text);
  font-size: 0.95rem;
}

.copyright {
  border-top: 1px solid #2B3A48;
  margin-top: 3rem;
  padding-top: 1.8rem;
  text-align: center;
  color: var(--footer-text);
  font-size: 0.95rem;
}

/* ---------- 返回顶部按钮 ---------- */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: var(--button-bg);
  color: #fff;
  border: none;
  border-radius: 50%;
  width: 52px;
  height: 52px;
  font-size: 1.8rem;
  cursor: pointer;
  z-index: 2000;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
  transition: var(--transition-base);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: var(--brand-accent-dark);
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.back-to-top::before {
  content: '↑';
  line-height: 1;
}

/* ---------- 滚动动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 图片占位符 ---------- */
.svg-placeholder {
  max-width: 100%;
  height: auto;
  border-radius: 12px;
  transition: var(--transition-base);
}

.svg-placeholder:hover {
  transform: scale(1.02);
}

/* ---------- 工具类 ---------- */
.text-center {
  text-align: center;
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mt-5 { margin-top: 3rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.mb-5 { margin-bottom: 3rem; }

/* ---------- 响应式断点 ---------- */
@media (max-width: 768px) {
  body {
    font-size: 15px;
  }

  .container {
    padding: 0 16px;
  }

  .section {
    padding: 2.5rem 0;
  }

  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  .hero {
    padding: 3rem 0;
  }

  .hero-grid {
    gap: 2rem;
    text-align: center;
  }

  .hero-image {
    order: -1;
  }

  .hero-image svg {
    width: 160px;
    height: 160px;
  }

  .card-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .article-list {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .article-item {
    padding: 1.5rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
    font-size: 1.4rem;
  }

  .howto-container {
    padding: 1.5rem;
  }

  .faq-item {
    padding: 1rem 1.2rem;
  }

  .theme-toggle {
    padding: 0.2rem 0.8rem;
    font-size: 1.1rem;
  }

  .logo a {
    font-size: 1.5rem;
  }
}

@media (max-width: 480px) {
  .hero-content p:first-of-type {
    font-size: 1.1rem;
  }

  .btn {
    padding: 0.6rem 1.5rem;
    font-size: 0.95rem;
  }

  .card {
    padding: 1.5rem;
  }

  .article-item {
    padding: 1.2rem;
  }

  .nav-links a {
    font-size: 0.95rem;
  }
}

/* ---------- 无障碍与焦点样式 ---------- */
:focus-visible {
  outline: 3px solid var(--brand-accent);
  outline-offset: 2px;
  border-radius: 4px;
}

::selection {
  background: var(--brand-accent);
  color: #fff;
}

/* ---------- 滚动条美化 ---------- */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--tag-bg);
  border-radius: 5px;
  border: 2px solid var(--bg-primary);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--brand-accent);
}

/* ---------- 打印优化 ---------- */
@media print {
  .site-header,
  .site-footer,
  .back-to-top,
  .theme-toggle,
  .menu-toggle,
  .btn {
    display: none !important;
  }

  body {
    background: #fff;
    color: #000;
  }

  .card,
  .article-item,
  .faq-item {
    break-inside: avoid;
    box-shadow: none;
  }
}

/* ---------- 性能辅助 ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}
```