```css
/* ===== 棒棒TV 全站样式 ===== */
/* 主题变量与高可读性规范 */
:root {
  --bg-body: #f8fafc;
  --bg-header: rgba(255, 255, 255, 0.85);
  --bg-card: #ffffff;
  --bg-footer: #1e293b;
  --text-primary: #1f2937;
  --text-secondary: #334155;
  --text-heading: #0f172a;
  --text-link: #1d4ed8;
  --text-button: #ffffff;
  --border-color: #cbd5e1;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  --shadow-hover: 0 12px 32px rgba(0, 0, 0, 0.12);
  --nav-bg: rgba(255, 255, 255, 0.85);
  --footer-text: #e2e8f0;
  --footer-heading: #ffffff;
  --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(255, 255, 255, 0.3);
  --card-hover-transform: translateY(-6px);
  --transition-speed: 0.3s;
  --border-radius-card: 20px;
  --border-radius-small: 12px;
  --font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
}

[data-theme="dark"] {
  --bg-body: #0f172a;
  --bg-header: rgba(30, 41, 59, 0.9);
  --bg-card: #1e293b;
  --bg-footer: #0b1120;
  --text-primary: #e2e8f0;
  --text-secondary: #cbd5e1;
  --text-heading: #f8fafc;
  --text-link: #93c5fd;
  --text-button: #ffffff;
  --border-color: #334155;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --nav-bg: rgba(30, 41, 59, 0.9);
  --footer-text: #cbd5e1;
  --footer-heading: #ffffff;
  --gradient-hero: linear-gradient(135deg, #1e293b 0%, #334155 100%);
  --glass-bg: rgba(30, 41, 59, 0.8);
  --glass-border: rgba(148, 163, 184, 0.2);
  --shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-hover: 0 12px 32px rgba(0, 0, 0, 0.5);
}

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

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

body {
  font-family: var(--font-family);
  background-color: var(--bg-body);
  color: var(--text-primary);
  line-height: 1.75;
  transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
  overflow-x: hidden;
  min-height: 100vh;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-speed) ease;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

input {
  font-family: inherit;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}

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

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

::-webkit-scrollbar-thumb {
  background: var(--accent);
  border-radius: 8px;
  border: 2px solid var(--bg-body);
}

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

/* ===== 头部导航 ===== */
header {
  background-color: var(--bg-header);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 1px solid var(--border-color);
  transition: background-color var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}

.header-wrapper {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 72px;
  gap: 1rem;
}

.logo a {
  font-size: 1.9rem;
  font-weight: 800;
  color: var(--text-heading);
  text-decoration: none;
  letter-spacing: 1px;
  transition: transform var(--transition-speed) ease;
  display: inline-block;
}

.logo a:hover {
  transform: scale(1.05);
}

.logo span {
  color: var(--accent);
  background: var(--gradient-hero);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* 主导航 */
nav.main-nav ul {
  display: flex;
  list-style: none;
  gap: 2rem;
}

nav.main-nav a {
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 500;
  font-size: 1.05rem;
  padding: 0.5rem 0;
  position: relative;
  transition: color var(--transition-speed) ease;
}

nav.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width var(--transition-speed) ease;
}

nav.main-nav a:hover {
  color: var(--accent);
}

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

/* 头部操作区 */
.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* 搜索框 */
.search-box {
  display: flex;
  align-items: center;
  background: var(--bg-body);
  border: 1px solid var(--border-color);
  border-radius: 50px;
  padding: 0.3rem 0.8rem;
  transition: all var(--transition-speed) ease;
  position: relative;
}

.search-box:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.search-box input {
  border: none;
  background: transparent;
  color: var(--text-primary);
  padding: 0.4rem 0.6rem;
  font-size: 0.95rem;
  outline: none;
  width: 180px;
  transition: width var(--transition-speed) ease;
}

.search-box input:focus {
  width: 220px;
}

.search-box input::placeholder {
  color: var(--text-secondary);
  opacity: 0.8;
}

.search-box button {
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--text-primary);
  font-size: 1.2rem;
  display: flex;
  padding: 0.2rem;
  transition: color var(--transition-speed) ease;
}

.search-box button:hover {
  color: var(--accent);
}

/* 暗色模式切换 */
.dark-toggle {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 50px;
  padding: 0.4rem 1rem;
  color: var(--text-primary);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-speed) ease;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.9rem;
}

.dark-toggle:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

/* 菜单按钮 */
.menu-toggle {
  display: none;
  font-size: 2rem;
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  line-height: 1;
  transition: transform var(--transition-speed) ease;
}

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

/* 移动端菜单 */
.mobile-nav {
  display: none;
  background: var(--bg-header);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 1rem 0;
  border-top: 1px solid var(--border-color);
  animation: slideDown 0.3s ease;
}

.mobile-nav.active {
  display: block;
}

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

.mobile-nav ul {
  list-style: none;
  padding: 0 1rem;
}

.mobile-nav li {
  margin: 0.7rem 0;
}

.mobile-nav a {
  color: var(--text-primary);
  text-decoration: none;
  font-size: 1.2rem;
  display: block;
  padding: 0.4rem 0;
  border-radius: 8px;
  transition: all var(--transition-speed) ease;
}

.mobile-nav a:hover {
  color: var(--accent);
  padding-left: 0.5rem;
  background: rgba(37, 99, 235, 0.05);
}

/* ===== 英雄区 ===== */
.hero {
  background: var(--gradient-hero);
  padding: 4rem 0;
  position: relative;
  overflow: hidden;
  border-bottom: none;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
  border-radius: 50%;
  animation: float 8s ease-in-out infinite;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.08) 0%, transparent 70%);
  border-radius: 50%;
  animation: float 6s ease-in-out infinite reverse;
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-20px); }
}

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

.hero-text {
  flex: 1 1 400px;
}

.hero-text h1 {
  font-size: 3.2rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 1.2rem;
  line-height: 1.2;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
  animation: fadeInUp 0.8s ease;
}

.hero-text p {
  font-size: 1.25rem;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 2.5rem;
  max-width: 600px;
  line-height: 1.8;
  animation: fadeInUp 0.8s ease 0.2s both;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-cta {
  display: flex;
  gap: 1.2rem;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease 0.4s both;
}

/* 按钮 */
.btn {
  background: #ffffff;
  color: var(--accent);
  padding: 1rem 2.5rem;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 700;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-speed) ease;
  font-size: 1rem;
  display: inline-block;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
}

.btn-outline {
  background: transparent;
  border: 2px solid #ffffff;
  color: #ffffff;
  box-shadow: none;
}

.btn-outline:hover {
  background: #ffffff;
  color: var(--accent);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
}

.hero-visual {
  flex: 1 1 400px;
  display: flex;
  justify-content: center;
  animation: fadeInRight 0.8s ease 0.3s both;
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.hero-visual svg {
  max-width: 100%;
  height: auto;
  filter: drop-shadow(0 10px 30px rgba(0, 0, 0, 0.2));
  transition: transform var(--transition-speed) ease;
}

.hero-visual svg:hover {
  transform: scale(1.05) rotate(2deg);
}

/* ===== 通用区块标题 ===== */
.section-title {
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--text-heading);
  margin: 3rem 0 2rem;
  padding-left: 1.2rem;
  position: relative;
  line-height: 1.3;
  transition: color var(--transition-speed) ease;
}

.section-title::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 60%;
  background: var(--gradient-hero);
  border-radius: 3px;
}

/* ===== 卡片网格 ===== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 2rem;
  margin: 2rem 0;
}

/* 卡片基础 */
.card {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--border-radius-card);
  padding: 2rem;
  box-shadow: var(--shadow);
  border: 1px solid var(--glass-border);
  transition: all var(--transition-speed) ease;
  position: relative;
  overflow: hidden;
  opacity: 1;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-hero);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-speed) ease;
}

.card:hover {
  transform: var(--card-hover-transform);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent);
}

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

.card h3 {
  font-size: 1.5rem;
  color: var(--text-heading);
  margin-bottom: 0.8rem;
  font-weight: 700;
  transition: color var(--transition-speed) ease;
}

.card p {
  color: var(--text-primary);
  margin-bottom: 1.2rem;
  line-height: 1.7;
}

.card a {
  color: var(--text-link);
  font-weight: 500;
  text-decoration: none;
  transition: color var(--transition-speed) ease;
}

.card a:hover {
  color: var(--accent);
  text-decoration: underline;
}

/* ===== 文章列表 ===== */
.article-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2rem;
  margin: 2rem 0;
}

.article-item {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 1.8rem;
  border-radius: var(--border-radius-small);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow);
  transition: all var(--transition-speed) ease;
  position: relative;
  overflow: hidden;
}

.article-item::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-hero);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-speed) ease;
}

.article-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent);
}

.article-item:hover::after {
  transform: scaleX(1);
}

.article-item h4 {
  font-size: 1.3rem;
  color: var(--text-heading);
  margin-bottom: 0.3rem;
  font-weight: 700;
  transition: color var(--transition-speed) ease;
}

.article-item h4:hover {
  color: var(--accent);
}

.article-item .meta {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 0.8rem;
  border-bottom: 1px dashed var(--border-color);
  padding-bottom: 0.6rem;
  transition: color var(--transition-speed) ease;
}

.article-item p {
  color: var(--text-primary);
  line-height: 1.7;
}

.read-more {
  color: var(--text-link);
  font-weight: 600;
  text-decoration: none;
  display: inline-block;
  margin-top: 0.6rem;
  transition: all var(--transition-speed) ease;
  position: relative;
}

.read-more:hover {
  color: var(--accent);
  transform: translateX(4px);
}

/* ===== FAQ ===== */
.faq-item {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--border-radius-small);
  padding: 1.2rem 1.5rem;
  margin-bottom: 1rem;
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow);
  transition: all var(--transition-speed) ease;
}

.faq-item:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-hover);
}

.faq-question {
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--text-heading);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: color var(--transition-speed) ease;
  padding: 0.5rem 0;
}

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

.faq-question span {
  font-size: 1.5rem;
  font-weight: 400;
  transition: transform var(--transition-speed) ease;
  color: var(--accent);
  flex-shrink: 0;
  margin-left: 1rem;
}

.faq-item[data-open="true"] .faq-question span {
  transform: rotate(45deg);
}

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

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

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

/* ===== HowTo ===== */
.howto-box {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--border-radius-card);
  padding: 2.5rem;
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow);
  transition: all var(--transition-speed) ease;
}

.howto-box:hover {
  box-shadow: var(--shadow-hover);
  border-color: var(--accent);
}

.howto-box h3 {
  font-size: 1.6rem;
  color: var(--text-heading);
  margin-bottom: 1rem;
  font-weight: 700;
}

.howto-box h4 {
  font-size: 1.2rem;
  color: var(--accent);
  margin: 1.5rem 0 0.8rem;
  font-weight: 600;
}

.howto-box ol {
  margin-left: 1.5rem;
  margin-top: 1rem;
}

.howto-box li {
  margin-bottom: 0.8rem;
  color: var(--text-primary);
  line-height: 1.7;
  padding-left: 0.5rem;
}

.howto-box li::marker {
  color: var(--accent);
  font-weight: 700;
}

.howto-box p {
  color: var(--text-primary);
  line-height: 1.8;
  margin: 0.5rem 0;
}

.howto-box p:last-child {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(37, 99, 235, 0.05));
  padding: 1rem;
  border-radius: 8px;
  border-left: 3px solid var(--accent);
  margin-top: 1rem;
}

/* ===== 页脚 ===== */
footer {
  background: var(--bg-footer);
  color: var(--footer-text);
  padding: 4rem 0 2rem;
  margin-top: 5rem;
  position: relative;
}

footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-hero);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 3rem;
}

footer h4 {
  color: var(--footer-heading);
  font-size: 1.2rem;
  margin-bottom: 1.2rem;
  font-weight: 700;
  position: relative;
  padding-bottom: 0.5rem;
}

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

footer a {
  color: var(--footer-text);
  text-decoration: none;
  display: block;
  margin: 0.4rem 0;
  transition: all var(--transition-speed) ease;
  position: relative;
  padding-left: 0;
}

footer a:hover {
  color: #ffffff;
  padding-left: 10px;
}

footer p {
  line-height: 1.7;
  color: var(--footer-text);
}

.footer-bottom {
  border-top: 1px solid #334155;
  margin-top: 3rem;
  padding-top: 1.5rem;
  text-align: center;
  font-size: 0.9rem;
  color: var(--footer-text);
  transition: color var(--transition-speed) ease;
}

/* ===== 返回顶部按钮 ===== */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 50%;
  width: 52px;
  height: 52px;
  font-size: 1.8rem;
  cursor: pointer;
  box-shadow: 0 4px 15px rgba(37, 99, 235, 0.4);
  z-index: 999;
  transition: all var(--transition-speed) ease;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--accent-hover);
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(37, 99, 235, 0.5);
}

/* ===== 滚动动画 ===== */
.card, .article-item, .faq-item, .howto-box {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease, box-shadow var(--transition-speed) ease, border-color var(--transition-speed) ease;
}

.card.visible, .article-item.visible, .faq-item.visible, .howto-box.visible {
  opacity: 1;
  transform: translateY(0);
}

/* 延迟动画 */
.card:nth-child(2), .article-item:nth-child(2), .faq-item:nth-child(2) {
  transition-delay: 0.1s;
}

.card:nth-child(3), .article-item:nth-child(3), .faq-item:nth-child(3) {
  transition-delay: 0.2s;
}

.card:nth-child(4), .article-item:nth-child(4), .faq-item:nth-child(4) {
  transition-delay: 0.3s;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .hero-text h1 {
    font-size: 2.8rem;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .card-grid {
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 16px;
  }
  
  .header-wrapper {
    height: 64px;
  }
  
  .main-nav, .search-box {
    display: none;
  }
  
  .menu-toggle {
    display: block;
  }
  
  .mobile-nav.active {
    display: block;
  }
  
  .hero {
    padding: 3rem 0;
  }
  
  .hero-text h1 {
    font-size: 2.2rem;
  }
  
  .hero-text p {
    font-size: 1.1rem;
  }
  
  .section-title {
    font-size: 1.8rem;
    margin: 2rem 0 1.5rem;
  }
  
  .card-grid, .article-list {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .hero-cta {
    flex-direction: column;
    width: 100%;
  }
  
  .btn {
    width: 100%;
    text-align: center;
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
  
  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
    font-size: 1.5rem;
  }
  
  .howto-box {
    padding: 1.5rem;
  }
  
  .faq-question {
    font-size: 1.1rem;
  }
}

@media (max-width: 480px) {
  .logo a {
    font-size: 1.6rem;
  }
  
  .dark-toggle {
    padding: 0.3rem 0.8rem;
    font-size: 0.85rem;
  }
  
  .hero-text h1 {
    font-size: 1.9rem;
  }
  
  .hero-text p {
    font-size: 1rem;
  }
  
  .section-title {
    font-size: 1.5rem;
  }
  
  .card {
    padding: 1.5rem;
  }
  
  .article-item {
    padding: 1.2rem;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .footer-bottom {
    font-size: 0.8rem;
  }
}

/* ===== 无障碍与打印 ===== */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

@media print {
  header, footer, .back-to-top, .hero-cta, .search-box, .dark-toggle, .menu-toggle, .mobile-nav {
    display: none !important;
  }
  
  body {
    background: white;
    color: black;
  }
  
  .card, .article-item, .faq-item, .howto-box {
    opacity: 1 !important;
    transform: none !important;
    box-shadow: none;
    border: 1px solid #ddd;
  }
}

/* ===== 焦点样式 ===== */
:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

/* ===== 文本选择 ===== */
::selection {
  background: var(--accent);
  color: white;
}

/* ===== 卡片内链接 ===== */
.card a, .article-item a {
  position: relative;
  display: inline-block;
}

.card a::after, .article-item .read-more::after {
  content: '→';
  margin-left: 0.3rem;
  transition: transform var(--transition-speed) ease;
  display: inline-block;
}

.card a:hover::after, .article-item .read-more:hover::after {
  transform: translateX(4px);
}

/* ===== 搜索框在移动端隐藏的补充 ===== */
@media (max-width: 768px) {
  .search-box {
    display: none;
  }
  
  .header-actions {
    gap: 0.5rem;
  }
}

/* ===== 主题切换动画 ===== */
body, header, .card, .article-item, .faq-item, .howto-box, footer {
  transition: background-color var(--transition-speed) ease, 
              color var(--transition-speed) ease,
              border-color var(--transition-speed) ease,
              box-shadow var(--transition-speed) ease,
              transform var(--transition-speed) ease,
              opacity var(--transition-speed) ease;
}

/* ===== 暗色模式下的卡片优化 ===== */
[data-theme="dark"] .card,
[data-theme="dark"] .article-item,
[data-theme="dark"] .faq-item,
[data-theme="dark"] .howto-box {
  background: rgba(30, 41, 59, 0.9);
}

/* ===== 暗色模式下的搜索框 ===== */
[data-theme="dark"] .search-box {
  background: var(--bg-body);
}

[data-theme="dark"] .search-box input {
  color: var(--text-primary);
}

/* ===== 暗色模式下的按钮 ===== */
[data-theme="dark"] .dark-toggle {
  background: var(--bg-body);
  border-color: var(--border-color);
}

/* ===== 暗色模式下的导航 ===== */
[data-theme="dark"] header {
  background-color: rgba(30, 41, 59, 0.9);
}

/* ===== 暗色模式下的页脚 ===== */
[data-theme="dark"] footer {
  background: var(--bg-footer);
}

/* ===== 暗色模式下的英雄区 ===== */
[data-theme="dark"] .hero {
  background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
}

/* ===== 暗色模式下的按钮 ===== */
[data-theme="dark"] .btn {
  background: var(--accent);
  color: white;
}

[data-theme="dark"] .btn-outline {
  background: transparent;
  border-color: var(--accent);
  color: var(--accent);
}

[data-theme="dark"] .btn-outline:hover {
  background: var(--accent);
  color: white;
}

/* ===== 滚动条在暗色模式 ===== */
[data-theme="dark"] ::-webkit-scrollbar-track {
  background: var(--bg-body);
}

[data-theme="dark"] ::-webkit-scrollbar-thumb {
  border-color: var(--bg-body);
}
```