```css
/* =========================================
   爱丫爱丫影院 - 主样式表
   设计理念：影视娱乐 + 现代科技感
   风格：深空渐变 + 霓虹点缀 + 毛玻璃
   ========================================= */

/* CSS Variables */
:root {
  --bg-light: #F8FAFC;
  --bg-dark: #0B1120;
  --text-light: #1F2937;
  --text-dark: #E2E8F0;
  --primary: #2563EB;
  --primary-light: #3B82F6;
  --primary-dark: #1E3A8A;
  --secondary: #0EA5E9;
  --accent: #F59E0B;
  --accent-light: #FBBF24;
  --card-bg-light: #FFFFFF;
  --card-bg-dark: #1E293B;
  --border-light: #E2E8F0;
  --border-dark: #334155;
  --nav-bg-light: rgba(255,255,255,0.85);
  --nav-bg-dark: rgba(15,23,42,0.85);
  --footer-bg-light: #F1F5F9;
  --footer-bg-dark: #0B1120;
  --heading-light: #111827;
  --heading-dark: #F8FAFC;
  --muted-light: #475569;
  --muted-dark: #94A3B8;
  --shadow-sm: 0 4px 12px rgba(0,0,0,0.06);
  --shadow-md: 0 8px 24px rgba(0,0,0,0.1);
  --shadow-lg: 0 16px 48px rgba(0,0,0,0.15);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --transition-fast: 0.2s ease;
  --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro SC", "PingFang SC",
    "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg-light);
  color: var(--text-light);
  line-height: 1.75;
  font-size: 16px;
  transition: background-color 0.4s ease, color 0.4s ease;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body.dark-mode {
  background-color: var(--bg-dark);
  color: var(--text-dark);
}

/* 滚动条美化 */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 20px;
  border: 2px solid transparent;
  background-clip: padding-box;
}
::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(135deg, var(--primary-light), #38BDF8);
  background-clip: padding-box;
}

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

/* 通用标题 */
.section-title {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--heading-light);
  margin-bottom: 40px;
  position: relative;
  padding-bottom: 16px;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

body.dark-mode .section-title {
  color: var(--heading-dark);
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 72px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
  border-radius: 4px;
  box-shadow: 0 2px 12px rgba(37, 99, 235, 0.4);
}

body.dark-mode .section-title::after {
  background: linear-gradient(90deg, #60A5FA, #38BDF8, #FBBF24);
  box-shadow: 0 2px 16px rgba(96, 165, 250, 0.5);
}

/* =========================================
   导航栏 Navigation
   ========================================= */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--nav-bg-light);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border-light);
  transition: background 0.4s ease, border 0.4s ease;
}

body.dark-mode .navbar {
  background: var(--nav-bg-dark);
  border-bottom-color: var(--border-dark);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 20px;
}

.logo a {
  font-size: 1.65rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--primary), var(--secondary), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-decoration: none;
  letter-spacing: -0.5px;
  white-space: nowrap;
  transition: all 0.3s ease;
  position: relative;
}

body.dark-mode .logo a {
  background: linear-gradient(135deg, #60A5FA, #38BDF8, #FBBF24);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.logo a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 2px;
  transition: width 0.3s ease;
}

.logo a:hover::after {
  width: 100%;
}

.nav-links {
  display: flex;
  gap: 32px;
  align-items: center;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  font-weight: 500;
  color: var(--text-light);
  transition: color 0.2s ease;
  font-size: 1rem;
  position: relative;
  padding: 4px 0;
}

body.dark-mode .nav-links a {
  color: var(--text-dark);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  border-radius: 2px;
  transition: width 0.3s ease;
}

.nav-links a:hover {
  color: var(--primary);
}

body.dark-mode .nav-links a:hover {
  color: #60A5FA;
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.search-box {
  display: flex;
  align-items: center;
  background: var(--card-bg-light);
  border: 1.5px solid var(--border-light);
  border-radius: 50px;
  padding: 8px 18px;
  transition: all 0.3s ease;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

body.dark-mode .search-box {
  background: var(--card-bg-dark);
  border-color: var(--border-dark);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

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

body.dark-mode .search-box:focus-within {
  border-color: #60A5FA;
  box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.2);
}

.search-box input {
  border: none;
  outline: none;
  background: transparent;
  color: var(--text-light);
  width: 160px;
  font-size: 0.95rem;
  transition: width 0.3s ease;
}

body.dark-mode .search-box input {
  color: var(--text-dark);
}

.search-box input::placeholder {
  color: var(--muted-light);
  opacity: 0.7;
}

body.dark-mode .search-box input::placeholder {
  color: var(--muted-dark);
}

.search-box input:focus {
  width: 200px;
}

.icon-btn {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.3rem;
  color: var(--text-light);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8px;
  border-radius: 50%;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

body.dark-mode .icon-btn {
  color: var(--text-dark);
}

.icon-btn:hover {
  background: rgba(37, 99, 235, 0.1);
  transform: scale(1.1);
}

body.dark-mode .icon-btn:hover {
  background: rgba(96, 165, 250, 0.15);
}

.mobile-menu-toggle {
  display: none;
  font-size: 1.8rem;
}

/* 移动端菜单 */
.mobile-nav {
  display: none;
  background: var(--bg-light);
  padding: 16px 24px;
  border-top: 1px solid var(--border-light);
  animation: slideDown 0.3s ease;
}

body.dark-mode .mobile-nav {
  background: var(--bg-dark);
  border-top-color: var(--border-dark);
}

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

.mobile-nav a {
  display: block;
  padding: 12px 0;
  font-weight: 500;
  color: var(--text-light);
  text-decoration: none;
  border-bottom: 1px solid var(--border-light);
  font-size: 1.05rem;
  transition: all 0.2s ease;
}

body.dark-mode .mobile-nav a {
  color: var(--text-dark);
  border-bottom-color: var(--border-dark);
}

.mobile-nav a:hover {
  color: var(--primary);
  padding-left: 8px;
}

body.dark-mode .mobile-nav a:hover {
  color: #60A5FA;
}

.mobile-nav a:last-child {
  border-bottom: none;
}

/* =========================================
   按钮 Buttons
   ========================================= */
.btn {
  display: inline-block;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #ffffff;
  font-weight: 600;
  padding: 12px 32px;
  border-radius: 50px;
  border: none;
  cursor: pointer;
  text-decoration: none;
  font-size: 1rem;
  transition: all 0.3s ease;
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.3);
  position: relative;
  overflow: hidden;
  letter-spacing: 0.02em;
}

.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 {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.4);
}

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

body.dark-mode .btn {
  background: linear-gradient(135deg, #2563EB, #3B82F6);
  box-shadow: 0 4px 20px rgba(37, 99, 235, 0.5);
}

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

body.dark-mode .btn-outline {
  color: #60A5FA;
  border-color: #60A5FA;
}

.btn-outline:hover {
  background: rgba(37, 99, 235, 0.1);
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.2);
}

body.dark-mode .btn-outline:hover {
  background: rgba(96, 165, 250, 0.15);
}

/* =========================================
   Hero Banner
   ========================================= */
.hero {
  padding: 80px 0 100px;
  position: relative;
  overflow: hidden;
  background: radial-gradient(circle at 10% 30%, rgba(37, 99, 235, 0.12), transparent 40%),
    radial-gradient(circle at 90% 80%, rgba(14, 165, 233, 0.1), transparent 40%),
    linear-gradient(135deg, #F0F9FF 0%, #E0F2FE 100%);
}

body.dark-mode .hero {
  background: radial-gradient(circle at 10% 30%, rgba(37, 99, 235, 0.2), transparent 40%),
    radial-gradient(circle at 90% 80%, rgba(14, 165, 233, 0.15), transparent 40%),
    linear-gradient(135deg, #0F172A 0%, #1E293B 100%);
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%232563EB' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  animation: float 20s linear infinite;
}

.hero-content {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-text h1 {
  font-size: 3.2rem;
  font-weight: 900;
  color: var(--heading-light);
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--heading-light), var(--primary));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: fadeInUp 0.8s ease;
}

body.dark-mode .hero-text h1 {
  background: linear-gradient(135deg, #F8FAFC, #60A5FA);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-text p {
  font-size: 1.15rem;
  color: var(--text-light);
  margin-bottom: 28px;
  max-width: 580px;
  line-height: 1.8;
  animation: fadeInUp 0.8s ease 0.1s both;
}

body.dark-mode .hero-text p {
  color: var(--text-dark);
}

.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 40px;
  animation: fadeInUp 0.8s ease 0.2s both;
}

.stat-item {
  text-align: center;
  padding: 16px 24px;
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(12px);
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.8);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.05);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

body.dark-mode .stat-item {
  background: rgba(30, 41, 59, 0.7);
  border-color: rgba(51, 65, 85, 0.8);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}

.stat-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.15);
}

.stat-number {
  font-size: 2.2rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: 1.2;
}

body.dark-mode .stat-number {
  background: linear-gradient(135deg, #60A5FA, #38BDF8);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--muted-light);
  margin-top: 4px;
}

body.dark-mode .stat-label {
  color: var(--muted-dark);
}

.hero-img {
  position: relative;
  animation: floatIn 1s ease;
}

.img-svg {
  width: 100%;
  height: auto;
  border-radius: 20px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
  transition: transform 0.4s ease;
}

.hero-img:hover .img-svg {
  transform: scale(1.02) rotate(1deg);
}

/* =========================================
   区块通用 Section
   ========================================= */
section {
  padding: 64px 0;
  position: relative;
}

/* =========================================
   卡片 Grid & Card
   ========================================= */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 28px;
}

.card {
  background: var(--card-bg-light);
  border-radius: var(--radius-md);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

body.dark-mode .card {
  background: var(--card-bg-dark);
  border-color: var(--border-dark);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

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

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

body.dark-mode .card:hover {
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
}

.card h3 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--heading-light);
  margin-bottom: 14px;
  line-height: 1.4;
  transition: color 0.3s ease;
}

body.dark-mode .card h3 {
  color: var(--heading-dark);
}

.card:hover h3 {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.card p {
  color: var(--text-light);
  font-size: 0.95rem;
  line-height: 1.75;
}

body.dark-mode .card p {
  color: var(--text-dark);
}

/* =========================================
   文章卡片 Article Card
   ========================================= */
.article-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 220px;
}

.article-meta {
  font-size: 0.85rem;
  color: var(--muted-light);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 12px;
  background: rgba(37, 99, 235, 0.08);
  border-radius: 20px;
  display: inline-flex;
}

body.dark-mode .article-meta {
  color: var(--muted-dark);
  background: rgba(96, 165, 250, 0.1);
}

.article-card a {
  color: var(--primary);
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s ease;
  margin-top: 16px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

body.dark-mode .article-card a {
  color: #60A5FA;
}

.article-card a:hover {
  gap: 8px;
  text-decoration: underline;
}

/* =========================================
   FAQ 手风琴
   ========================================= */
.faq-item {
  background: var(--card-bg-light);
  border: 1px solid var(--border-light);
  border-radius: 14px;
  margin-bottom: 16px;
  overflow: hidden;
  transition: all 0.3s ease;
}

body.dark-mode .faq-item {
  background: var(--card-bg-dark);
  border-color: var(--border-dark);
}

.faq-item:hover {
  border-color: var(--primary);
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.1);
}

body.dark-mode .faq-item:hover {
  border-color: #60A5FA;
  box-shadow: 0 4px 16px rgba(96, 165, 250, 0.15);
}

.faq-question {
  padding: 20px 24px;
  font-weight: 600;
  font-size: 1.05rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--heading-light);
  background: transparent;
  border: none;
  width: 100%;
  text-align: left;
  transition: all 0.3s ease;
}

body.dark-mode .faq-question {
  color: var(--heading-dark);
}

.faq-question span {
  font-size: 1.5rem;
  font-weight: 400;
  transition: transform 0.3s ease;
  color: var(--primary);
}

body.dark-mode .faq-question span {
  color: #60A5FA;
}

.faq-item.active .faq-question span {
  transform: rotate(45deg);
}

.faq-answer {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
  color: var(--text-light);
  border-top: 1px solid transparent;
  line-height: 1.8;
}

body.dark-mode .faq-answer {
  color: var(--text-dark);
}

.faq-item.active .faq-answer {
  max-height: 500px;
  padding: 16px 24px 20px;
  border-top-color: var(--border-light);
}

body.dark-mode .faq-item.active .faq-answer {
  border-top-color: var(--border-dark);
}

/* =========================================
   表格 Table
   ========================================= */
.table-wrap {
  overflow-x: auto;
  border-radius: 12px;
  box-shadow: var(--shadow-sm);
}

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

body.dark-mode table {
  background: var(--card-bg-dark);
}

th,
td {
  padding: 14px 18px;
  border: 1px solid var(--border-light);
  text-align: left;
}

body.dark-mode th,
body.dark-mode td {
  border-color: var(--border-dark);
}

th {
  background: linear-gradient(135deg, #F1F5F9, #E2E8F0);
  font-weight: 700;
  color: #1E293B;
  letter-spacing: 0.02em;
}

body.dark-mode th {
  background: linear-gradient(135deg, #1E293B, #334155);
  color: #F1F5F9;
}

tr:hover {
  background: rgba(37, 99, 235, 0.03);
}

body.dark-mode tr:hover {
  background: rgba(96, 165, 250, 0.05);
}

/* =========================================
   Footer 页脚
   ========================================= */
.site-footer {
  background: var(--footer-bg-light);
  border-top: 1px solid var(--border-light);
  padding: 60px 0 24px;
  margin-top: 40px;
  position: relative;
  overflow: hidden;
}

body.dark-mode .site-footer {
  background: var(--footer-bg-dark);
  border-top-color: var(--border-dark);
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--primary), var(--secondary), var(--accent), transparent);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand p {
  color: var(--muted-light);
  font-size: 0.9rem;
  margin-top: 12px;
  line-height: 1.7;
}

body.dark-mode .footer-brand p {
  color: var(--muted-dark);
}

.footer-brand h3 {
  font-size: 1.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

body.dark-mode .footer-brand h3 {
  background: linear-gradient(135deg, #60A5FA, #FBBF24);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
  list-style: none;
}

.footer-links a {
  color: var(--muted-light);
  text-decoration: none;
  font-size: 0.9rem;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

body.dark-mode .footer-links a {
  color: var(--muted-dark);
}

.footer-links a:hover {
  color: var(--primary);
  transform: translateX(4px);
}

body.dark-mode .footer-links a:hover {
  color: #60A5FA;
}

.copyright {
  border-top: 1px solid var(--border-light);
  padding-top: 24px;
  text-align: center;
  color: var(--muted-light);
  font-size: 0.85rem;
  line-height: 1.8;
}

body.dark-mode .copyright {
  border-top-color: var(--border-dark);
  color: var(--muted-dark);
}

.copyright p {
  margin-bottom: 4px;
}

/* =========================================
   返回顶部 Back to Top
   ========================================= */
.back-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  border: none;
  border-radius: 50%;
  width: 52px;
  height: 52px;
  font-size: 1.5rem;
  cursor: pointer;
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.35);
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  transform: translateY(20px);
}

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

.back-top:hover {
  transform: translateY(-4px) scale(1.1);
  box-shadow: 0 12px 32px rgba(37, 99, 235, 0.5);
}

/* =========================================
   滚动动画 Reveal
   ========================================= */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* =========================================
   HowTo 教程样式
   ========================================= */
.howto-card {
  max-width: 800px;
  padding: 32px;
}

.howto-card ol {
  padding-left: 28px;
  margin: 20px 0;
  color: var(--text-light);
  counter-reset: step;
}

body.dark-mode .howto-card ol {
  color: var(--text-dark);
}

.howto-card ol li {
  margin-bottom: 12px;
  position: relative;
  padding-left: 8px;
  line-height: 1.8;
}

.howto-card ol li::marker {
  color: var(--primary);
  font-weight: 700;
}

.howto-card strong {
  color: var(--primary);
}

body.dark-mode .howto-card strong {
  color: #60A5FA;
}

.howto-card p {
  margin-bottom: 12px;
}

/* =========================================
   友情链接区域
   ========================================= */
.site-links {
  padding: 40px 0;
}

.site-links .footer-links {
  flex-direction: row;
  flex-wrap: wrap;
  gap: 16px 32px;
}

.site-links .footer-links a {
  padding: 8px 16px;
  background: var(--card-bg-light);
  border: 1px solid var(--border-light);
  border-radius: 30px;
  transition: all 0.3s ease;
}

body.dark-mode .site-links .footer-links a {
  background: var(--card-bg-dark);
  border-color: var(--border-dark);
}

.site-links .footer-links a:hover {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

body.dark-mode .site-links .footer-links a:hover {
  background: #60A5FA;
  border-color: #60A5FA;
}

/* =========================================
   响应式 Media Queries
   ========================================= */
@media (max-width: 1024px) {
  .hero-content {
    gap: 40px;
  }
  
  .hero-text h1 {
    font-size: 2.6rem;
  }
  
  .stat-item {
    padding: 12px 16px;
  }
  
  .stat-number {
    font-size: 1.8rem;
  }
}

@media (max-width: 900px) {
  .nav-links {
    display: none;
  }
  
  .mobile-menu-toggle {
    display: block;
  }
  
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .hero-text p {
    margin-left: auto;
    margin-right: auto;
  }
  
  .hero-stats {
    justify-content: center;
  }
  
  .hero-img {
    max-width: 500px;
    margin: 0 auto;
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  
  .section-title {
    font-size: 1.9rem;
  }
}

@media (max-width: 600px) {
  .container {
    padding: 0 16px;
  }
  
  .nav-inner {
    height: 64px;
  }
  
  .logo a {
    font-size: 1.35rem;
  }
  
  .search-box {
    display: none;
  }
  
  .hero {
    padding: 40px 0 60px;
  }
  
  .hero-text h1 {
    font-size: 2rem;
  }
  
  .hero-text p {
    font-size: 1rem;
  }
  
  .hero-stats {
    flex-direction: column;
    gap: 16px;
    align-items: center;
  }
  
  .stat-item {
    width: 100%;
    max-width: 280px;
  }
  
  .card-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .card {
    padding: 20px;
  }
  
  .section-title {
    font-size: 1.6rem;
    margin-bottom: 28px;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  
  .back-top {
    bottom: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
    font-size: 1.2rem;
  }
  
  section {
    padding: 40px 0;
  }
  
  .faq-question {
    padding: 16px 18px;
    font-size: 0.95rem;
  }
  
  .faq-answer {
    padding: 0 18px;
  }
  
  .faq-item.active .faq-answer {
    padding: 14px 18px 18px;
  }
}

/* =========================================
   动画 Animations
   ========================================= */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes floatIn {
  from {
    opacity: 0;
    transform: translateY(40px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

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

/* =========================================
   深色模式额外优化
   ========================================= */
@media (prefers-color-scheme: dark) {
  body:not(.dark-mode) {
    color-scheme: dark;
  }
}

body.dark-mode {
  color-scheme: dark;
}

::selection {
  background: rgba(37, 99, 235, 0.3);
  color: inherit;
}

body.dark-mode ::selection {
  background: rgba(96, 165, 250, 0.3);
}

/* 焦点可见性 */
:focus-visible {
  outline: 3px solid rgba(37, 99, 235, 0.5);
  outline-offset: 2px;
}

body.dark-mode :focus-visible {
  outline-color: rgba(96, 165, 250, 0.5);
}

/* 打印样式 */
@media print {
  .navbar,
  .back-top,
  .mobile-menu-toggle,
  .icon-btn {
    display: none !important;
  }
  
  body {
    background: white;
    color: black;
  }
  
  .card {
    box-shadow: none;
    border: 1px solid #ddd;
  }
}
```