/* ===== 动漫之家 全站样式 v2.0 ===== */
/* ===== 全局变量与主题系统 ===== */
:root {
  --bg-page: #f8fafc;
  --bg-card: #ffffff;
  --bg-header: rgba(255,255,255,0.92);
  --bg-footer: #0f172a;
  --text-primary: #1f2937;
  --text-secondary: #475569;
  --text-heading: #0f172a;
  --text-link: #1d4ed8;
  --text-on-dark: #f1f5f9;
  --border-light: #e2e8f0;
  --border-medium: #cbd5e1;
  --brand-accent: #2563eb;
  --brand-accent-soft: rgba(37, 99, 235, 0.1);
  --brand-secondary: #7c3aed;
  --brand-warm: #f59e0b;
  --btn-bg: #2563eb;
  --btn-text: #ffffff;
  --btn-hover: #1d4ed8;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.10);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.12);
  --shadow-glow: 0 0 0 1px rgba(37,99,235,0.08), 0 8px 24px rgba(37,99,235,0.15);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 999px;
  --gradient-hero: linear-gradient(135deg, #0f172a 0%, #1e293b 40%, #312e81 100%);
  --gradient-card: linear-gradient(145deg, #ffffff 0%, #f1f5f9 100%);
  --gradient-accent: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
  --gradient-warm: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Consolas', monospace;
}

/* 暗色主题 */
[data-theme="dark"] {
  --bg-page: #0b1120;
  --bg-card: #1e293b;
  --bg-header: rgba(15, 23, 42, 0.92);
  --bg-footer: #020617;
  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-heading: #ffffff;
  --text-link: #93c5fd;
  --text-on-dark: #f8fafc;
  --border-light: #1e293b;
  --border-medium: #334155;
  --brand-accent: #3b82f6;
  --brand-accent-soft: rgba(59, 130, 246, 0.15);
  --brand-secondary: #a78bfa;
  --brand-warm: #fbbf24;
  --btn-bg: #3b82f6;
  --btn-text: #0b1120;
  --btn-hover: #60a5fa;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.4);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.5);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.6);
  --shadow-glow: 0 0 0 1px rgba(59,130,246,0.2), 0 8px 24px rgba(59,130,246,0.2);
  --gradient-card: linear-gradient(145deg, #1e293b 0%, #0f172a 100%);
  --gradient-hero: linear-gradient(135deg, #020617 0%, #0f172a 40%, #1e1b4b 100%);
}

/* ===== 基础重置与排版 ===== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scrollbar-width: thin;
  scrollbar-color: var(--border-medium) var(--bg-page);
}

body {
  background-color: var(--bg-page);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.7;
  font-size: 1rem;
  transition: background-color var(--transition-base), color var(--transition-base);
  overflow-x: hidden;
}

/* 滚动条美化 */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}
::-webkit-scrollbar-track {
  background: var(--bg-page);
}
::-webkit-scrollbar-thumb {
  background: var(--border-medium);
  border-radius: var(--radius-full);
  border: 2px solid var(--bg-page);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--brand-accent);
}

/* 标题层级 */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-heading);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.02em;
  margin-bottom: 0.5em;
}

h1 {
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 800;
  line-height: 1.2;
}

h2 {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  margin-top: 2.5rem;
  margin-bottom: 1.5rem;
  position: relative;
  padding-bottom: 0.5rem;
}

h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 4px;
  background: var(--gradient-accent);
  border-radius: var(--radius-full);
}

h3 {
  font-size: clamp(1.2rem, 2vw, 1.5rem);
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
}

h4 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-top: 1rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

p {
  color: var(--text-primary);
  margin-bottom: 1.2rem;
  font-size: 1rem;
  line-height: 1.8;
}

a {
  color: var(--text-link);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
  transition: all var(--transition-fast);
}

a:hover, a:focus-visible {
  color: var(--brand-accent);
  text-decoration: none;
}

ul, ol {
  padding-left: 1.5rem;
  margin-bottom: 1.2rem;
  color: var(--text-primary);
}

li {
  margin-bottom: 0.5rem;
  line-height: 1.8;
}

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

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

input, textarea, select {
  font-family: inherit;
  font-size: 1rem;
  color: var(--text-primary);
  background: var(--bg-card);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--brand-accent);
  box-shadow: 0 0 0 3px var(--brand-accent-soft);
}

/* ===== 布局容器 ===== */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 4rem 0;
}

/* ===== 卡片 ===== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
  margin: 30px 0;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(8px);
}

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

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-medium);
}

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

.card h3 {
  margin-top: 0;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 1rem;
}

.card a {
  font-weight: 600;
  font-size: 0.95rem;
}

/* 卡片图标 */
.card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--brand-accent-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  font-size: 1.5rem;
}

/* ===== 导航栏 ===== */
.navbar {
  background: var(--bg-header);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 1px solid var(--border-light);
  transition: background var(--transition-base), box-shadow var(--transition-base);
}

.navbar.scrolled {
  box-shadow: var(--shadow-md);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  padding: 0.8rem 24px;
  max-width: 1280px;
  margin: 0 auto;
}

.logo {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-heading);
  text-decoration: none;
  letter-spacing: -0.03em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.logo:hover {
  opacity: 0.9;
}

.nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
  flex-wrap: wrap;
}

.nav-links a {
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 500;
  padding: 0.5rem 0;
  border-bottom: 2px solid transparent;
  position: relative;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--transition-fast);
}

.nav-links a:hover, .nav-links a:focus-visible {
  color: var(--text-heading);
  border-bottom-color: transparent;
}

.nav-links a:hover::after, .nav-links a:focus-visible::after {
  transform: scaleX(1);
  transform-origin: left;
}

/* 主题切换按钮 */
.btn-theme {
  background: var(--gradient-accent);
  color: var(--btn-text);
  border: none;
  padding: 0.6rem 1.2rem;
  border-radius: var(--radius-full);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-sm);
  font-size: 0.9rem;
}

.btn-theme:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  opacity: 0.95;
}

/* 移动菜单按钮 */
.menu-toggle {
  display: none;
  background: var(--bg-card);
  border: 1px solid var(--border-medium);
  color: var(--text-primary);
  font-size: 1.5rem;
  padding: 0.3rem 0.8rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  line-height: 1;
}

.menu-toggle:hover {
  background: var(--brand-accent-soft);
  border-color: var(--brand-accent);
}

/* ===== Hero 首屏 ===== */
.hero {
  background: var(--gradient-hero);
  color: var(--text-on-dark);
  padding: 6rem 0;
  position: relative;
  overflow: hidden;
  border-radius: 0 0 48px 48px;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 80%;
  height: 200%;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.15) 0%, transparent 70%);
  animation: float 8s ease-in-out infinite;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 60%;
  height: 150%;
  background: radial-gradient(circle, rgba(124, 58, 237, 0.1) 0%, transparent 70%);
  animation: float 12s ease-in-out infinite reverse;
}

@keyframes float {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-20px) scale(1.05); }
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero h1 {
  color: #ffffff;
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 800;
  margin-bottom: 1rem;
  text-shadow: 0 2px 20px rgba(0,0,0,0.3);
  animation: fadeInUp 0.8s ease-out;
}

.hero p {
  color: #e2e8f0;
  font-size: clamp(1rem, 1.5vw, 1.2rem);
  max-width: 700px;
  margin-bottom: 2rem;
  line-height: 1.8;
  animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero .btn-hero {
  background: var(--gradient-warm);
  color: #ffffff;
  padding: 1rem 2.5rem;
  border-radius: var(--radius-full);
  font-weight: 700;
  display: inline-block;
  text-decoration: none;
  transition: all var(--transition-base);
  box-shadow: 0 4px 20px rgba(245, 158, 11, 0.4);
  animation: fadeInUp 0.8s ease-out 0.4s both;
  font-size: 1rem;
  border: none;
}

.hero .btn-hero:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 8px 30px rgba(245, 158, 11, 0.5);
  color: #ffffff;
}

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

/* Hero 装饰元素 */
.hero-badges {
  display: flex;
  gap: 1rem;
  margin-top: 2rem;
  flex-wrap: wrap;
}

.hero-badge {
  background: rgba(255,255,255,0.1);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.2);
  padding: 0.5rem 1.2rem;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  color: #e2e8f0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  animation: fadeInUp 0.8s ease-out 0.6s both;
}

/* ===== 面包屑 ===== */
.breadcrumb {
  font-size: 0.9rem;
  color: var(--text-secondary);
  padding: 1.5rem 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.breadcrumb a {
  color: var(--text-link);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

.breadcrumb span {
  color: var(--text-secondary);
}

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

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
}

th, td {
  padding: 1rem 1.5rem;
  text-align: left;
  border-bottom: 1px solid var(--border-light);
  color: var(--text-primary);
  font-size: 0.95rem;
}

th {
  background: var(--brand-accent-soft);
  font-weight: 700;
  color: var(--text-heading);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

tr:hover {
  background: var(--brand-accent-soft);
}

tr:last-child td {
  border-bottom: none;
}

/* ===== FAQ 样式 ===== */
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  margin-bottom: 0.75rem;
  overflow: hidden;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-sm);
}

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

details summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--text-heading);
  padding: 1.2rem 1.5rem;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background var(--transition-fast);
  user-select: none;
}

details summary::-webkit-details-marker {
  display: none;
}

details summary::after {
  content: '+';
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--brand-accent);
  transition: transform var(--transition-fast);
  display: inline-block;
}

details[open] summary {
  background: var(--brand-accent-soft);
}

details[open] summary::after {
  transform: rotate(45deg);
}

details p {
  padding: 0 1.5rem 1.2rem;
  color: var(--text-primary);
  margin: 0;
  animation: fadeInUp 0.3s ease-out;
}

/* ===== 按钮 ===== */
.btn {
  background: var(--btn-bg);
  color: var(--btn-text);
  padding: 0.8rem 2rem;
  border-radius: var(--radius-full);
  border: none;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  transition: all var(--transition-base);
  font-size: 1rem;
  box-shadow: var(--shadow-sm);
}

.btn:hover {
  background: var(--btn-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  color: var(--btn-text);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--brand-accent);
  color: var(--brand-accent);
  box-shadow: none;
}

.btn-outline:hover {
  background: var(--brand-accent);
  color: #ffffff;
}

.btn-sm {
  padding: 0.5rem 1.2rem;
  font-size: 0.9rem;
}

/* ===== 文章卡片 ===== */
.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 1.8rem;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.article-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--brand-accent);
}

.article-card h3 {
  margin-top: 0;
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  transition: color var(--transition-fast);
}

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

.article-meta {
  font-size: 0.85rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.75rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-light);
}

.article-meta span {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.article-card p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.article-card .read-more {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--brand-accent);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: gap var(--transition-fast);
}

.article-card .read-more:hover {
  gap: 0.8rem;
}

/* ===== 页脚 ===== */
footer {
  background: var(--bg-footer);
  color: var(--text-on-dark);
  padding: 4rem 0 2rem;
  margin-top: 5rem;
  border-radius: 32px 32px 0 0;
  position: relative;
}

footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-accent);
}

footer a {
  color: #cbd5e1;
  text-decoration: none;
  transition: color var(--transition-fast);
}

footer a:hover {
  color: #ffffff;
}

footer p, footer li {
  color: #cbd5e1;
  font-size: 0.95rem;
  line-height: 1.8;
}

footer h4 {
  color: #ffffff;
  font-size: 1.1rem;
  margin-bottom: 1rem;
  font-weight: 700;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 3rem;
}

.footer-grid ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-grid ul li {
  margin-bottom: 0.5rem;
}

.footer-bottom {
  margin-top: 3rem;
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 1.5rem;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

/* ===== 返回顶部按钮 ===== */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: var(--gradient-accent);
  color: var(--btn-text);
  border: none;
  border-radius: 50%;
  width: 52px;
  height: 52px;
  font-size: 1.5rem;
  cursor: pointer;
  box-shadow: var(--shadow-lg);
  z-index: 999;
  transition: all var(--transition-base);
  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 {
  transform: translateY(-4px) scale(1.1);
  box-shadow: var(--shadow-glow);
}

/* ===== 滚动动画 ===== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

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

/* ===== 锚点偏移 ===== */
[id] {
  scroll-margin-top: 90px;
}

/* ===== 文本工具类 ===== */
.text-muted {
  color: var(--text-secondary);
}

.text-center {
  text-align: center;
}

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

/* ===== 分隔线 ===== */
.divider {
  height: 1px;
  background: var(--border-light);
  margin: 2rem 0;
  border: none;
}

/* ===== 徽章 ===== */
.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  background: var(--brand-accent-soft);
  color: var(--brand-accent);
}

.badge-warm {
  background: rgba(245, 158, 11, 0.1);
  color: var(--brand-warm);
}

/* ===== 图片占位 ===== */
.svg-placeholder {
  background: linear-gradient(145deg, var(--border-light), var(--bg-page));
  border-radius: var(--radius-md);
  width: 100%;
  height: auto;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 200px;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* ===== 响应式设计 ===== */
@media (max-width: 1024px) {
  .container {
    padding: 0 20px;
  }
  
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 16px;
  }
  
  .nav-links {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.8rem;
    padding: 1rem 0;
    background: var(--bg-card);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    margin-top: 0.5rem;
  }
  
  .nav-links.open {
    display: flex;
    animation: fadeInUp 0.3s ease-out;
  }
  
  .nav-links a {
    width: 100%;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
  }
  
  .nav-links a:hover {
    background: var(--brand-accent-soft);
  }
  
  .menu-toggle {
    display: block;
  }
  
  .hero {
    padding: 4rem 0;
    border-radius: 0 0 32px 32px;
  }
  
  .hero h1 {
    font-size: 1.8rem;
  }
  
  .card-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  
  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
    font-size: 1.2rem;
  }
  
  h2 {
    font-size: 1.5rem;
  }
  
  .card {
    padding: 1.5rem;
  }
  
  .table-wrap {
    margin: 1rem -16px;
    border-radius: 0;
  }
  
  table {
    font-size: 0.85rem;
  }
  
  th, td {
    padding: 0.75rem 1rem;
  }
}

@media (max-width: 480px) {
  .hero-badges {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .btn {
    width: 100%;
    text-align: center;
  }
  
  .hero .btn-hero {
    width: 100%;
    text-align: center;
  }
  
  .card {
    padding: 1.25rem;
  }
  
  .footer-grid {
    gap: 1.5rem;
  }
}

/* ===== 打印样式 ===== */
@media print {
  .navbar, .back-to-top, .hero .btn-hero, .menu-toggle {
    display: none !important;
  }
  
  body {
    background: #ffffff;
    color: #000000;
  }
  
  .container {
    max-width: 100%;
    padding: 0;
  }
  
  .card {
    box-shadow: none;
    border: 1px solid #ddd;
  }
  
  a {
    color: #000000;
    text-decoration: underline;
  }
}

/* ===== 动画 ===== */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.animate-pulse {
  animation: pulse 2s ease-in-out infinite;
}

.animate-spin {
  animation: spin 1s linear infinite;
}

/* 减少动画偏好 */
@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;
  }
}

/* 高对比度模式 */
@media (prefers-contrast: high) {
  :root {
    --border-light: #64748b;
    --border-medium: #475569;
    --text-secondary: #1e293b;
  }
  
  [data-theme="dark"] {
    --border-light: #94a3b8;
    --border-medium: #cbd5e1;
    --text-secondary: #e2e8f0;
  }
}

/* ===== 焦点可见性 ===== */
:focus-visible {
  outline: 3px solid var(--brand-accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* ===== 选中文本样式 ===== */
::selection {
  background: var(--brand-accent);
  color: #ffffff;
}

/* ===== 代码块 ===== */
code, pre {
  font-family: var(--font-mono);
  background: var(--bg-page);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 0.2rem 0.4rem;
  font-size: 0.9em;
}

pre {
  padding: 1rem;
  overflow-x: auto;
  margin-bottom: 1.2rem;
}

pre code {
  background: none;
  border: none;
  padding: 0;
}

/* ===== 引用块 ===== */
blockquote {
  border-left: 4px solid var(--brand-accent);
  padding: 1rem 1.5rem;
  margin: 1.5rem 0;
  background: var(--brand-accent-soft);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--text-primary);
}

blockquote p {
  margin-bottom: 0;
}

/* ===== 表单 ===== */
.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: var(--text-primary);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
}

/* ===== 标签 ===== */
.tag {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: var(--brand-accent-soft);
  color: var(--brand-accent);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 500;
  margin: 0.25rem;
  transition: all var(--transition-fast);
}

.tag:hover {
  background: var(--brand-accent);
  color: #ffffff;
  transform: translateY(-2px);
}

/* ===== 统计数字 ===== */
.counter {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--text-heading);
  line-height: 1;
  margin-bottom: 0.5rem;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ===== 站点地图 ===== */
.sitemap {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 1rem 0;
}

.sitemap a {
  padding: 0.5rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-full);
  text-decoration: none;
  font-size: 0.9rem;
  transition: all var(--transition-base);
}

.sitemap a:hover {
  background: var(--brand-accent);
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}