```css
/* ===== 星辰影院 · 完整样式表 ===== */
/* 主题变量：支持明暗模式、高对比度、平滑过渡 */
:root {
  --bg: #f5f7fa;
  --bg-card: #ffffff;
  --text-primary: #17202A;
  --text-secondary: #243447;
  --text-muted: #334155;
  --text-link: #0b4f8a;
  --border-color: #cfd9e6;
  --nav-bg: rgba(255, 255, 255, 0.85);
  --footer-bg: #111c2a;
  --footer-text: #e2e8f0;
  --accent: #2563eb;
  --accent-text: #ffffff;
  --hover-bg: #e6edf5;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-md: 0 8px 24px rgba(0,0,0,0.08);
  --shadow-lg: 0 16px 40px rgba(0,0,0,0.12);
  --radius-sm: 12px;
  --radius-md: 20px;
  --radius-lg: 28px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  --bg: #0b141f;
  --bg-card: #111e2e;
  --text-primary: #F1F5F9;
  --text-secondary: #E2E8F0;
  --text-muted: #cbd5e1;
  --text-link: #93c5fd;
  --border-color: #2d3f52;
  --nav-bg: rgba(10, 20, 30, 0.85);
  --footer-bg: #0a111b;
  --footer-text: #e2e8f0;
  --accent: #3b82f6;
  --hover-bg: #1e2d40;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.4);
  --shadow-md: 0 8px 24px rgba(0,0,0,0.5);
  --shadow-lg: 0 16px 40px rgba(0,0,0,0.6);
}

/* ===== 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%;
}

body {
  background: var(--bg);
  color: var(--text-primary);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.7;
  font-size: 16px;
  transition: background 0.3s ease, color 0.3s ease;
  overflow-x: hidden;
}

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

h1, h2, h3, h4, h5, h6 {
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 0.5em;
}

h1 { font-size: clamp(1.8rem, 4vw, 2.5rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); margin-top: 2rem; padding-bottom: 0.5rem; border-bottom: 2px solid var(--border-color); }
h3 { font-size: 1.3rem; margin-top: 1.5rem; }
h4 { font-size: 1.1rem; }
p { color: var(--text-secondary); margin-bottom: 1rem; }
a { color: var(--text-link); text-decoration: none; transition: color 0.2s ease; }
a:hover { color: var(--accent); text-decoration: underline; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ===== 导航栏 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--nav-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  transition: background 0.3s ease, border-color 0.3s ease;
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  max-width: 1200px;
  margin: 0 auto;
  gap: 16px;
}

.logo {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: 0.5px;
  display: flex;
  align-items: center;
  gap: 10px;
  white-space: nowrap;
}

.logo svg {
  width: 36px;
  height: 36px;
  fill: var(--accent);
  flex-shrink: 0;
  transition: transform 0.3s ease;
}

.logo:hover svg {
  transform: rotate(20deg) scale(1.1);
}

.nav-links {
  display: flex;
  gap: 8px;
  align-items: center;
}

.nav-links a {
  color: var(--text-secondary);
  font-weight: 500;
  padding: 8px 16px;
  border-radius: 30px;
  transition: all 0.3s ease;
  position: relative;
}

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

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 60%;
  height: 3px;
  background: var(--accent);
  border-radius: 3px;
  transition: transform 0.3s ease;
}

.nav-links a:hover::after {
  transform: translateX(-50%) scaleX(1);
}

.theme-toggle, .menu-toggle {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 30px;
  padding: 8px 14px;
  color: var(--text-primary);
  cursor: pointer;
  font-size: 1rem;
  transition: all 0.3s ease;
  box-shadow: var(--shadow-sm);
  line-height: 1;
}

.theme-toggle:hover, .menu-toggle:hover {
  background: var(--hover-bg);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.menu-toggle {
  display: none;
  font-size: 1.4rem;
}

.mobile-nav {
  display: none;
  flex-direction: column;
  background: var(--bg-card);
  border-top: 1px solid var(--border-color);
  padding: 10px 20px;
  box-shadow: var(--shadow-md);
  animation: slideDown 0.3s ease;
}

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

.mobile-nav a {
  padding: 14px 12px;
  border-bottom: 1px solid var(--border-color);
  font-weight: 500;
  color: var(--text-secondary);
  transition: all 0.2s ease;
}

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

.mobile-nav a:hover {
  background: var(--hover-bg);
  color: var(--accent);
  text-decoration: none;
  padding-left: 20px;
}

.mobile-nav.open {
  display: flex;
}

/* ===== Banner区域 ===== */
.banner {
  background: linear-gradient(135deg, #1a2a3a 0%, #2d4a6f 50%, #1e3a5f 100%);
  color: white;
  border-radius: var(--radius-lg);
  padding: clamp(2rem, 5vw, 4rem);
  margin: 2rem 0;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.banner::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 60%;
  height: 200%;
  background: radial-gradient(circle, rgba(255,255,255,0.15) 0%, transparent 70%);
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-20px) rotate(5deg); }
}

.banner h1 {
  color: white;
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  position: relative;
  z-index: 1;
  text-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

.banner p {
  color: rgba(255,255,255,0.9);
  font-size: 1.1rem;
  max-width: 700px;
  position: relative;
  z-index: 1;
  text-shadow: 0 1px 4px rgba(0,0,0,0.3);
}

.banner-btn {
  display: inline-block;
  background: rgba(255,255,255,0.2);
  color: white;
  padding: 14px 32px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1rem;
  border: 2px solid rgba(255,255,255,0.3);
  backdrop-filter: blur(10px);
  transition: all 0.4s ease;
  position: relative;
  z-index: 1;
  text-decoration: none;
  margin-top: 1rem;
}

.banner-btn:hover {
  background: rgba(255,255,255,0.3);
  transform: translateY(-4px);
  box-shadow: 0 12px 24px rgba(0,0,0,0.3);
  color: white;
  text-decoration: none;
}

/* ===== 卡片网格 ===== */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin: 2rem 0;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.8rem;
  transition: all 0.3s ease;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--accent);
  transform: scaleX(0);
  transition: transform 0.3s ease;
  transform-origin: left;
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent);
}

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

.card h3 {
  margin-top: 0;
  font-size: 1.25rem;
}

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

.badge {
  display: inline-block;
  background: linear-gradient(135deg, var(--accent), #7c3aed);
  color: white;
  padding: 4px 14px;
  border-radius: 30px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
}

/* ===== 文章列表 ===== */
#articles {
  margin: 2rem 0;
}

#articles article {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 1.5rem 1.8rem;
  margin-bottom: 1rem;
  transition: all 0.3s ease;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

#articles article:hover {
  transform: translateX(8px);
  box-shadow: var(--shadow-md);
  border-left: 4px solid var(--accent);
}

#articles article h3 {
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

#articles article p {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 0;
}

#articles article a {
  font-weight: 600;
  color: var(--accent);
}

#articles article a:hover {
  text-decoration: underline;
}

/* ===== FAQ ===== */
.faq-item {
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 0;
  transition: all 0.3s ease;
}

.faq-item:last-child {
  border-bottom: none;
}

.faq-question {
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-primary);
  background: none;
  border: none;
  padding: 0;
  font-size: 1.1rem;
  text-align: left;
  width: 100%;
  transition: color 0.3s ease;
  gap: 1rem;
}

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

.faq-question span {
  font-size: 1.4rem;
  font-weight: 300;
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  color: var(--text-secondary);
  padding-right: 1rem;
  line-height: 1.6;
}

.faq-item.open .faq-answer {
  max-height: 200px;
  margin-top: 12px;
  animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== 表格 ===== */
.contact-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  background: var(--bg-card);
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.contact-table td, .contact-table th {
  border: 1px solid var(--border-color);
  padding: 16px 20px;
  color: var(--text-primary);
  text-align: left;
}

.contact-table th {
  background: var(--hover-bg);
  font-weight: 700;
  width: 30%;
  color: var(--accent);
}

.contact-table tr {
  transition: background 0.2s ease;
}

.contact-table tr:hover {
  background: var(--hover-bg);
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--footer-bg);
  color: var(--footer-text);
  padding: 3rem 0 2rem;
  margin-top: 4rem;
  border-radius: 40px 40px 0 0;
  position: relative;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(to right, transparent, rgba(255,255,255,0.2), transparent);
}

.site-footer .container {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  justify-content: space-between;
}

.site-footer a {
  color: var(--footer-text);
  text-decoration: underline;
  transition: color 0.3s ease;
}

.site-footer a:hover {
  color: #fff;
  text-decoration: none;
}

.site-footer .copyright {
  width: 100%;
  text-align: center;
  opacity: 0.8;
  margin-top: 2rem;
  font-size: 0.9rem;
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 1.5rem;
}

.footer-links a {
  margin-right: 16px;
  display: inline-block;
  transition: transform 0.2s ease;
}

.footer-links a:hover {
  transform: translateY(-2px);
}

/* ===== 搜索框 ===== */
.search-box {
  display: flex;
  gap: 10px;
  max-width: 500px;
  margin: 1.5rem auto;
}

.search-box input {
  flex: 1;
  padding: 14px 20px;
  border-radius: 50px;
  border: 2px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-primary);
  transition: all 0.3s ease;
  font-size: 1rem;
}

.search-box input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
}

/* ===== 按钮 ===== */
.btn {
  background: linear-gradient(135deg, var(--accent), #1e40af);
  color: white;
  border: none;
  padding: 14px 32px;
  border-radius: 50px;
  cursor: pointer;
  font-weight: 600;
  font-size: 1rem;
  transition: all 0.3s ease;
  display: inline-block;
  text-align: center;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.btn:hover {
  filter: brightness(1.1);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.4);
  color: white;
  text-decoration: none;
}

.btn:active {
  transform: translateY(0);
}

/* ===== 返回顶部 ===== */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: linear-gradient(135deg, var(--accent), #1e40af);
  color: white;
  padding: 14px 18px;
  border-radius: 50%;
  font-size: 1.4rem;
  cursor: pointer;
  border: none;
  z-index: 100;
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.4);
  transition: all 0.3s ease;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
}

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

.back-to-top:hover {
  transform: translateY(-6px) scale(1.1);
  box-shadow: 0 12px 32px rgba(37, 99, 235, 0.5);
}

/* ===== 滚动动画 ===== */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* ===== 工具类 ===== */
.text-center { text-align: center; }
.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }

/* ===== 响应式设计 ===== */
@media (max-width: 900px) {
  .nav-links { display: none; }
  .menu-toggle { display: block; }
  .mobile-nav.open { display: flex; }
  
  .site-header .nav-wrap {
    padding: 10px 16px;
  }
  
  .logo {
    font-size: 1.3rem;
  }
  
  .banner {
    margin: 1.5rem 0;
    padding: 2rem;
  }
  
  .grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  
  .card {
    padding: 1.2rem;
  }
  
  .site-footer .container {
    flex-direction: column;
    gap: 1.5rem;
    padding: 0 24px;
  }
  
  .contact-table th {
    width: 35%;
  }
}

@media (max-width: 600px) {
  .container {
    padding: 0 16px;
  }
  
  h1 { font-size: 1.6rem; }
  h2 { font-size: 1.4rem; }
  
  .banner {
    border-radius: 20px;
    padding: 1.5rem;
  }
  
  .banner-btn {
    padding: 12px 24px;
    font-size: 0.95rem;
  }
  
  .nav-wrap {
    padding: 8px 12px;
  }
  
  .logo {
    font-size: 1.1rem;
  }
  
  .logo svg {
    width: 28px;
    height: 28px;
  }
  
  .theme-toggle, .menu-toggle {
    padding: 6px 10px;
  }
  
  #articles article {
    padding: 1rem 1.2rem;
  }
  
  .contact-table {
    font-size: 0.9rem;
  }
  
  .contact-table td, .contact-table th {
    padding: 12px;
  }
  
  .back-to-top {
    bottom: 20px;
    right: 20px;
    padding: 12px 14px;
    font-size: 1.2rem;
  }
  
  .site-footer {
    border-radius: 24px 24px 0 0;
    padding: 2rem 0 1.5rem;
  }
}

/* ===== 暗色模式细节优化 ===== */
[data-theme="dark"] .card {
  box-shadow: 0 4px 16px rgba(0,0,0,0.3);
}

[data-theme="dark"] .banner {
  background: linear-gradient(135deg, #0a141f 0%, #1a2a3a 50%, #0d1f2e 100%);
  border: 1px solid rgba(255,255,255,0.05);
}

[data-theme="dark"] .banner::before {
  background: radial-gradient(circle, rgba(255,255,255,0.05) 0%, transparent 70%);
}

[data-theme="dark"] .btn, [data-theme="dark"] .back-to-top {
  box-shadow: 0 8px 24px rgba(59, 130, 246, 0.3);
}

[data-theme="dark"] .faq-question {
  color: var(--text-primary);
}

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

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

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 5px;
}

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

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

/* ===== 打印样式 ===== */
@media print {
  .site-header,
  .site-footer,
  .back-to-top,
  .theme-toggle,
  .menu-toggle,
  .mobile-nav {
    display: none !important;
  }
  
  body {
    font-size: 12pt;
    color: #000;
    background: #fff;
  }
  
  .card, .banner {
    box-shadow: none;
    border: 1px solid #ccc;
  }
  
  a {
    color: #000;
    text-decoration: underline;
  }
}
```