```css
/* 悦福影院 - 完整样式表 */
:root {
  --bg: #F8FAFC;
  --card-bg: #FFFFFF;
  --text-primary: #1F2937;
  --text-secondary: #3E4C59;
  --text-heading: #0B1E33;
  --brand: #0F4C81;
  --brand-dark: #0A3A60;
  --border: #D1D9E0;
  --nav-bg: rgba(255, 255, 255, 0.85);
  --footer-bg: #0B1E33;
  --footer-text: #E5E7EB;
  --btn-text: #FFFFFF;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
  --chip-bg: #EFF6FF;
  --glass-bg: rgba(255, 255, 255, 0.6);
  --glass-border: rgba(255, 255, 255, 0.3);
  --gradient-primary: linear-gradient(135deg, #0F4C81 0%, #1E6B9E 50%, #2E8BC0 100%);
  --gradient-banner: linear-gradient(120deg, #0B1E33 0%, #1F3A5F 40%, #2E5A88 100%);
  --hover-lift: translateY(-6px);
  --transition-smooth: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --font-display: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
}

[data-theme="dark"] {
  --bg: #0F172A;
  --card-bg: #1E293B;
  --text-primary: #E2E8F0;
  --text-secondary: #94A3B8;
  --text-heading: #F8FAFC;
  --brand: #38BDF8;
  --brand-dark: #7DD3FC;
  --border: #334155;
  --nav-bg: rgba(30, 41, 59, 0.85);
  --footer-bg: #020617;
  --footer-text: #CBD5E1;
  --btn-text: #0F172A;
  --chip-bg: #1E3A5F;
  --glass-bg: rgba(30, 41, 59, 0.5);
  --glass-border: rgba(148, 163, 184, 0.2);
  --gradient-primary: linear-gradient(135deg, #0EA5E9 0%, #38BDF8 100%);
  --gradient-banner: linear-gradient(120deg, #020617 0%, #0F172A 50%, #1E293B 100%);
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--bg);
  color: var(--text-primary);
  line-height: 1.7;
  transition: background 0.4s ease, color 0.4s ease;
  overflow-x: hidden;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--text-heading);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.02em;
}

p { color: var(--text-primary); }

a {
  color: var(--brand-dark);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease;
}

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

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

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

/* ===== 导航栏 ===== */
.site-header {
  background: var(--nav-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 1px solid var(--border);
  transition: background 0.4s ease, box-shadow 0.4s ease;
}

.site-header.scrolled {
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.15);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 16px;
}

.logo {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-heading);
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  letter-spacing: -0.03em;
}

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

.logo-icon {
  width: 36px;
  height: 36px;
  background: var(--gradient-primary);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: white;
  box-shadow: 0 4px 12px rgba(15, 76, 129, 0.3);
}

.nav-links {
  display: flex;
  gap: 28px;
  align-items: center;
}

.nav-links a {
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.95rem;
  position: relative;
  padding: 4px 0;
  transition: color 0.3s ease;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--brand);
  transition: width 0.3s ease;
  border-radius: 2px;
}

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

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

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

.theme-toggle,
.search-icon {
  background: var(--chip-bg);
  border: 1px solid var(--border);
  border-radius: 40px;
  padding: 8px 16px;
  color: var(--text-primary);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-smooth);
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 6px;
}

.theme-toggle:hover,
.search-icon:hover {
  background: var(--brand);
  color: white;
  border-color: var(--brand);
  transform: scale(1.02);
}

.search-icon {
  width: 42px;
  height: 42px;
  padding: 0;
  justify-content: center;
  font-size: 1.1rem;
  border-radius: 50%;
}

/* ===== 搜索区域 ===== */
.search-box {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 28px 0;
  border-bottom: 1px solid var(--border);
  transition: background 0.4s ease;
}

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

.search-flex input {
  flex: 1;
  padding: 16px 24px;
  font-size: 1rem;
  border: 2px solid var(--border);
  border-radius: 60px;
  background: var(--bg);
  color: var(--text-primary);
  transition: border-color 0.4s ease, box-shadow 0.4s ease;
  outline: none;
}

.search-flex input:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 4px rgba(15, 76, 129, 0.1);
}

.search-flex button {
  background: var(--gradient-primary);
  border: none;
  color: white;
  font-weight: 700;
  padding: 16px 32px;
  border-radius: 60px;
  cursor: pointer;
  transition: var(--transition-smooth);
  box-shadow: 0 4px 15px rgba(15, 76, 129, 0.3);
}

.search-flex button:hover {
  transform: scale(1.03);
  box-shadow: 0 6px 20px rgba(15, 76, 129, 0.4);
}

/* ===== Banner 区域 ===== */
.banner {
  background: var(--gradient-banner);
  color: white;
  padding: 48px 40px;
  margin: 32px 0;
  border-radius: 32px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(11, 30, 51, 0.3);
}

.banner::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -30%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
  animation: float 8s infinite ease-in-out;
}

.banner::after {
  content: '🎬';
  position: absolute;
  bottom: -20px;
  right: 20px;
  font-size: 120px;
  opacity: 0.15;
  transform: rotate(-10deg);
}

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

.banner-content {
  position: relative;
  z-index: 2;
  max-width: 650px;
}

.banner h2 {
  color: #FFFFFF;
  font-size: 2.4rem;
  margin-bottom: 16px;
  letter-spacing: -0.03em;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.banner p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.15rem;
  margin-bottom: 24px;
  line-height: 1.8;
}

.btn {
  background: linear-gradient(135deg, #FBBF24, #F59E0B);
  color: #0B1E33;
  border: none;
  padding: 14px 36px;
  border-radius: 60px;
  font-weight: 700;
  display: inline-block;
  font-size: 1rem;
  cursor: pointer;
  transition: var(--transition-smooth);
  box-shadow: 0 4px 15px rgba(251, 191, 36, 0.4);
  text-decoration: none;
}

.btn:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 8px 25px rgba(251, 191, 36, 0.5);
  text-decoration: none;
}

/* ===== 卡片系统 ===== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin: 32px 0;
}

.card {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-radius: 24px;
  padding: 28px;
  box-shadow: var(--shadow);
  border: 1px solid var(--glass-border);
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity 0.4s ease;
}

.card:hover {
  transform: var(--hover-lift);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.12);
  border-color: var(--brand);
}

.card:hover::before {
  opacity: 1;
}

.card h3 {
  font-size: 1.4rem;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.card h3 svg, .card h3 img {
  width: 28px;
  height: 28px;
}

.card p {
  color: var(--text-primary);
  line-height: 1.8;
}

.badge {
  display: inline-block;
  background: var(--chip-bg);
  padding: 6px 16px;
  border-radius: 40px;
  color: var(--brand-dark);
  font-weight: 600;
  font-size: 0.85rem;
  margin-bottom: 12px;
  letter-spacing: 0.02em;
}

/* ===== 文章列表 ===== */
.article-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin: 32px 0;
}

.article-list article {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 24px 28px;
  border-radius: 18px;
  border: 1px solid var(--glass-border);
  transition: var(--transition-smooth);
  cursor: pointer;
}

.article-list article:hover {
  transform: translateX(8px);
  border-color: var(--brand);
  box-shadow: var(--shadow);
}

.article-list h4 {
  font-size: 1.2rem;
  margin-bottom: 8px;
  transition: color 0.3s ease;
}

.article-list article:hover h4 {
  color: var(--brand);
}

.meta {
  color: var(--text-secondary);
  font-size: 0.85rem;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 10px;
}

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

.article-list a {
  color: var(--brand);
  font-weight: 600;
  margin-left: 4px;
}

/* ===== FAQ ===== */
.faq-item {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-radius: 20px;
  padding: 20px 24px;
  margin-bottom: 12px;
  border: 1px solid var(--glass-border);
  transition: var(--transition-smooth);
  cursor: pointer;
}

.faq-item:hover {
  border-color: var(--brand);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.faq-q {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text-heading);
  display: flex;
  align-items: center;
  gap: 10px;
}

.faq-a {
  margin-top: 8px;
  color: var(--text-primary);
  line-height: 1.8;
  padding-left: 28px;
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--footer-bg);
  color: var(--footer-text);
  padding: 50px 0 30px;
  margin-top: 60px;
  position: relative;
  overflow: hidden;
}

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

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  margin-bottom: 30px;
}

.site-footer h5 {
  color: #FFFFFF;
  margin-bottom: 16px;
  font-size: 1.1rem;
  position: relative;
  display: inline-block;
}

.site-footer h5::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 24px;
  height: 2px;
  background: var(--brand);
}

.site-footer a {
  color: #CBD5E1;
  transition: color 0.3s ease;
  margin: 0 4px;
}

.site-footer a:hover {
  color: var(--brand);
  text-decoration: none;
}

.site-footer p {
  color: #CBD5E1;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 20px;
  text-align: center;
  font-size: 0.9rem;
}

/* ===== 返回顶部 ===== */
.back-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: var(--gradient-primary);
  color: white;
  border: none;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  font-size: 1.4rem;
  cursor: pointer;
  z-index: 1000;
  box-shadow: 0 4px 20px rgba(15, 76, 129, 0.4);
  transition: var(--transition-smooth);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.back-top:hover {
  transform: translateY(-4px) scale(1.05);
  box-shadow: 0 8px 30px rgba(15, 76, 129, 0.5);
}

/* ===== 内容区块间距 ===== */
section {
  margin: 48px 0;
  scroll-margin-top: 80px;
}

section h2 {
  font-size: 2rem;
  margin-bottom: 24px;
  position: relative;
  display: inline-block;
  padding-bottom: 12px;
}

section h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 48px;
  height: 4px;
  background: var(--gradient-primary);
  border-radius: 4px;
}

/* ===== HowTo 区域 ===== */
.howto-box {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 28px;
  border-radius: 24px;
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow);
}

.howto-box p {
  margin-bottom: 12px;
  line-height: 1.9;
}

.howto-box strong {
  color: var(--brand);
}

/* ===== 联系卡片 ===== */
.contact-card {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-radius: 24px;
  padding: 28px;
  box-shadow: var(--shadow);
  border: 1px solid var(--glass-border);
  transition: var(--transition-smooth);
}

.contact-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
}

.contact-card h3 {
  margin-bottom: 12px;
}

/* ===== 动画效果 ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

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

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

.card, .article-list article, .faq-item, .banner {
  animation: fadeInUp 0.6s ease-out both;
}

.card:nth-child(1) { animation-delay: 0.1s; }
.card:nth-child(2) { animation-delay: 0.2s; }
.card:nth-child(3) { animation-delay: 0.3s; }
.card:nth-child(4) { animation-delay: 0.4s; }
.card:nth-child(5) { animation-delay: 0.5s; }
.card:nth-child(6) { animation-delay: 0.6s; }

/* ===== 滚动条 ===== */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 8px;
}

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

/* ===== 工具类 ===== */
.text-secondary { color: var(--text-secondary); }
.text-heading { color: var(--text-heading); }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.text-center { text-align: center; }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .container { padding: 0 20px; }
  .nav-links { gap: 20px; }
  .banner { padding: 40px 30px; }
  .banner h2 { font-size: 2rem; }
}

@media (max-width: 768px) {
  .container { padding: 0 16px; }
  
  .nav-wrap {
    height: 60px;
    gap: 8px;
  }
  
  .logo { font-size: 1.3rem; }
  .logo-icon { width: 32px; height: 32px; font-size: 1rem; }
  
  .nav-links {
    display: none;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--nav-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 16px 24px;
    gap: 12px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    border-bottom: 1px solid var(--border);
    animation: fadeIn 0.3s ease;
  }
  
  .nav-links.active {
    display: flex;
  }
  
  .nav-links a {
    font-size: 1.1rem;
    padding: 8px 0;
    width: 100%;
    border-bottom: 1px solid var(--border);
  }
  
  .nav-links a:last-child {
    border-bottom: none;
  }
  
  .theme-toggle {
    padding: 6px 12px;
    font-size: 0.8rem;
  }
  
  .search-icon {
    width: 38px;
    height: 38px;
  }
  
  .search-flex {
    flex-direction: column;
    gap: 10px;
  }
  
  .search-flex input {
    width: 100%;
    padding: 12px 20px;
    font-size: 0.95rem;
  }
  
  .search-flex button {
    width: 100%;
    padding: 12px 24px;
    font-size: 0.95rem;
  }
  
  .banner {
    padding: 32px 24px;
    margin: 20px 0;
    border-radius: 24px;
  }
  
  .banner h2 { font-size: 1.6rem; }
  .banner p { font-size: 1rem; }
  
  .btn {
    padding: 12px 28px;
    font-size: 0.95rem;
  }
  
  .card-grid {
    grid-template-columns: 1fr;
    gap: 16px;
    margin: 24px 0;
  }
  
  .card {
    padding: 22px;
    border-radius: 20px;
  }
  
  .article-list article {
    padding: 18px 20px;
  }
  
  .article-list h4 {
    font-size: 1.1rem;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  
  section {
    margin: 32px 0;
  }
  
  section h2 {
    font-size: 1.5rem;
  }
  
  .faq-item {
    padding: 16px 18px;
  }
  
  .faq-a {
    padding-left: 0;
  }
  
  .back-top {
    bottom: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
    font-size: 1.2rem;
  }
  
  .howto-box {
    padding: 20px;
  }
  
  .contact-card {
    padding: 20px;
  }
}

@media (max-width: 480px) {
  .logo { font-size: 1.1rem; }
  .logo-icon { width: 28px; height: 28px; font-size: 0.9rem; }
  
  .theme-toggle {
    display: none;
  }
  
  .banner h2 { font-size: 1.3rem; }
  .banner p { font-size: 0.95rem; }
  
  .card h3 { font-size: 1.2rem; }
  
  .btn {
    padding: 10px 24px;
    font-size: 0.9rem;
  }
  
  section h2 {
    font-size: 1.3rem;
  }
}

/* ===== 无障碍与可读性 ===== */
@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;
  }
}

@media (prefers-contrast: high) {
  :root {
    --border: #000;
    --text-primary: #000;
    --text-secondary: #333;
    --text-heading: #000;
  }
  
  [data-theme="dark"] {
    --border: #fff;
    --text-primary: #fff;
    --text-secondary: #ddd;
    --text-heading: #fff;
  }
}

/* ===== 打印样式 ===== */
@media print {
  .site-header,
  .search-box,
  .back-top,
  .theme-toggle,
  .search-icon,
  .btn {
    display: none !important;
  }
  
  body {
    background: white;
    color: black;
  }
  
  .card, .article-list article, .faq-item {
    background: white;
    border: 1px solid #ddd;
    box-shadow: none;
    break-inside: avoid;
  }
  
  .site-footer {
    background: white;
    color: black;
  }
}

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

/* ===== 选区样式 ===== */
::selection {
  background: var(--brand);
  color: white;
}

/* ===== 加载动画 ===== */
.loading {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 200px;
}

.loading::after {
  content: '';
  width: 40px;
  height: 40px;
  border: 4px solid var(--border);
  border-top-color: var(--brand);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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