```css
/* ===== 123影院 全站样式 ===== */
:root {
  --bg-page: #f8fafc;
  --bg-soft: #eef2f7;
  --bg-card: #ffffff;
  --bg-nav: rgba(255, 255, 255, 0.85);
  --text-primary: #1f2937;
  --text-secondary: #4b5563;
  --text-title: #111827;
  --text-link: #1d4ed8;
  --text-accent: #0f3b66;
  --border-light: #e5e7eb;
  --btn-bg: #1e3a8a;
  --btn-hover: #1e40af;
  --btn-text: #ffffff;
  --footer-bg: #0f172a;
  --footer-text: #cbd5e1;
  --footer-heading: #f1f5f9;
  --code-bg: #f1f5f9;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08);
  --glass-bg: rgba(255, 255, 255, 0.6);
  --glass-border: rgba(255, 255, 255, 0.3);
  --hero-gradient: linear-gradient(135deg, #eef2f7 0%, #dbeafe 50%, #e0e7ff 100%);
  --card-hover-transform: translateY(-6px);
  --transition-speed: 0.3s ease;
}

/* 暗色模式 */
@media (prefers-color-scheme: dark) {
  :root {
    --bg-page: #0b1120;
    --bg-soft: #1e293b;
    --bg-card: #0f172a;
    --bg-nav: rgba(15, 23, 42, 0.85);
    --text-primary: #e2e8f0;
    --text-secondary: #cbd5e1;
    --text-title: #f8fafc;
    --text-link: #93c5fd;
    --border-light: #334155;
    --btn-bg: #2563eb;
    --btn-hover: #1d4ed8;
    --footer-bg: #0f172a;
    --footer-text: #cbd5e1;
    --footer-heading: #f1f5f9;
    --code-bg: #1e293b;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    --glass-bg: rgba(15, 23, 42, 0.6);
    --glass-border: rgba(255, 255, 255, 0.1);
    --hero-gradient: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #1e3a8a 100%);
  }
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  background: var(--bg-page);
  color: var(--text-primary);
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  line-height: 1.75;
  overflow-x: hidden;
  transition: background-color var(--transition-speed), color var(--transition-speed);
}

h1, h2, h3, h4, h5, h6 {
  color: var(--text-title);
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 0.5em;
}

h1 { font-size: clamp(1.8rem, 4vw, 2.5rem); }
h2 { font-size: clamp(1.5rem, 3vw, 1.8rem); border-bottom: 2px solid var(--border-light); padding-bottom: 0.5rem; margin-top: 2rem; }
h3 { font-size: 1.3rem; }
h4 { font-size: 1.1rem; }

p {
  margin-bottom: 1rem;
}

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

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

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

ul, ol {
  padding-left: 1.5rem;
  margin-bottom: 1rem;
}

button {
  font-family: inherit;
  cursor: pointer;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  color: var(--text-primary);
}

/* ===== 布局工具 ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  width: 100%;
}

.text-secondary { color: var(--text-secondary); }
.text-center { text-align: center; }
.mt-2 { margin-top: 2rem; }
.mb-2 { margin-bottom: 2rem; }

/* ===== 按钮 ===== */
.btn {
  background: var(--btn-bg);
  color: var(--btn-text);
  padding: 0.7rem 1.5rem;
  border-radius: 0.5rem;
  font-weight: 500;
  display: inline-block;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-speed);
  box-shadow: var(--shadow-sm);
  text-align: center;
}

.btn:hover {
  background: var(--btn-hover);
  color: var(--btn-text);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  text-decoration: none;
}

.btn-outline {
  background: transparent;
  color: var(--text-link);
  border: 1px solid var(--text-link);
  box-shadow: none;
}

.btn-outline:hover {
  background: var(--text-link);
  color: #fff;
}

/* ===== 导航栏 ===== */
.site-header {
  background: var(--bg-nav);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-speed);
}

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

.nav-flex {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  padding-top: 0.75rem;
  padding-bottom: 0.75rem;
}

.logo {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-title);
  background: linear-gradient(135deg, var(--btn-bg), #7c3aed);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.5px;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  align-items: center;
}

.nav-links a {
  color: var(--text-primary);
  font-weight: 500;
  padding: 0.4rem 0;
  position: relative;
  transition: color var(--transition-speed);
}

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

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

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

.search-box {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.search-box input {
  padding: 0.5rem 1rem;
  border: 1px solid var(--border-light);
  border-radius: 0.5rem;
  background: var(--bg-card);
  color: var(--text-primary);
  transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
  min-width: 200px;
}

.search-box input:focus {
  outline: none;
  border-color: var(--text-link);
  box-shadow: 0 0 0 3px rgba(29, 78, 216, 0.15);
}

.search-box button {
  background: var(--btn-bg);
  color: white;
  border: none;
  padding: 0.5rem 1.2rem;
  border-radius: 0.5rem;
  font-weight: 500;
  transition: background var(--transition-speed);
}

.search-box button:hover {
  background: var(--btn-hover);
}

/* ===== Hero 首屏 ===== */
.hero {
  background: var(--hero-gradient);
  padding: clamp(2rem, 5vw, 4rem);
  border-radius: 1.5rem;
  margin-bottom: 3rem;
  position: relative;
  overflow: hidden;
  animation: heroFadeIn 0.8s ease-out;
}

@keyframes heroFadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 60%;
  height: 200%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.2) 0%, transparent 70%);
  pointer-events: none;
}

.hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  margin-bottom: 1rem;
  position: relative;
  z-index: 1;
}

.hero p {
  font-size: 1.1rem;
  max-width: 800px;
  position: relative;
  z-index: 1;
}

.hero .btn-group {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
  position: relative;
  z-index: 1;
}

.hero .meta-info {
  margin-top: 1.5rem;
  font-size: 0.9rem;
  opacity: 0.8;
}

/* ===== 卡片网格 ===== */
.grid-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: 1rem;
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-speed), box-shadow var(--transition-speed), border-color var(--transition-speed);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
}

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

.card h3 {
  margin-top: 0;
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}

.card p {
  margin-bottom: 0;
  color: var(--text-secondary);
}

/* ===== FAQ 样式 ===== */
.faq-item {
  border-bottom: 1px solid var(--border-light);
  padding: 1.25rem 0;
  transition: background var(--transition-speed);
}

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

.faq-question {
  font-weight: 600;
  color: var(--text-title);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 0;
  transition: color var(--transition-speed);
}

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

.faq-question::after {
  content: '+';
  font-size: 1.5rem;
  font-weight: 300;
  transition: transform var(--transition-speed);
}

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

.faq-answer {
  color: var(--text-primary);
  margin-top: 0.5rem;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, margin-top 0.4s ease, padding 0.4s ease;
  padding: 0;
  line-height: 1.7;
}

.faq-answer.open {
  max-height: 500px;
  margin-top: 0.75rem;
  padding-top: 0.25rem;
}

/* ===== 表格 ===== */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  overflow: hidden;
  border-radius: 0.75rem;
  box-shadow: var(--shadow-sm);
}

th, td {
  border: 1px solid var(--border-light);
  padding: 0.75rem 1rem;
  color: var(--text-primary);
  text-align: left;
}

th {
  background: var(--bg-soft);
  color: var(--text-title);
  font-weight: 600;
}

tr {
  transition: background var(--transition-speed);
}

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

/* ===== 文章列表 ===== */
.article-list {
  list-style: none;
  padding: 0;
}

.article-list li {
  padding: 0.9rem 0;
  border-bottom: 1px dashed var(--border-light);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  transition: padding-left var(--transition-speed);
}

.article-list li:hover {
  padding-left: 0.5rem;
}

.article-list li a {
  font-weight: 500;
  transition: color var(--transition-speed);
}

.timestamp {
  color: var(--text-secondary);
  font-size: 0.85rem;
  white-space: nowrap;
}

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

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--btn-bg), #7c3aed, var(--btn-bg));
}

.site-footer a {
  color: #93c5fd;
  transition: color var(--transition-speed);
}

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

.site-footer h4 {
  color: var(--footer-heading);
  margin-bottom: 1rem;
  font-size: 1.1rem;
}

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

.footer-flex > div {
  flex: 1;
  min-width: 200px;
}

.footer-flex p {
  margin-bottom: 0.5rem;
}

/* ===== 返回顶部按钮 ===== */
#backToTop {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: var(--btn-bg);
  color: white;
  border: none;
  padding: 0.75rem 1rem;
  border-radius: 0.75rem;
  display: none;
  z-index: 99;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-speed);
  font-size: 1.2rem;
  line-height: 1;
}

#backToTop:hover {
  background: var(--btn-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

/* ===== 滚动动画 ===== */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== 响应式设计 ===== */
@media (max-width: 768px) {
  .container {
    padding: 0.75rem 1rem;
  }

  .nav-flex {
    flex-direction: column;
    align-items: stretch;
    gap: 0.75rem;
  }

  .nav-links {
    justify-content: center;
    gap: 1rem;
    font-size: 0.9rem;
  }

  .search-box {
    width: 100%;
  }

  .search-box input {
    flex: 1;
    min-width: 0;
  }

  .hero {
    padding: 1.5rem;
    border-radius: 1rem;
  }

  .hero .btn-group {
    flex-direction: column;
  }

  .hero .btn {
    width: 100%;
  }

  .grid-cards {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .card {
    padding: 1.25rem;
  }

  .footer-flex {
    flex-direction: column;
    gap: 1.5rem;
  }

  .article-list li {
    flex-direction: column;
    align-items: flex-start;
  }

  #backToTop {
    bottom: 1rem;
    right: 1rem;
    padding: 0.6rem 0.8rem;
  }

  h1 { font-size: 1.8rem; }
  h2 { font-size: 1.5rem; }
}

@media (max-width: 480px) {
  .nav-links {
    gap: 0.75rem;
    font-size: 0.85rem;
  }

  .nav-links a {
    padding: 0.25rem 0;
  }

  .search-box {
    flex-direction: column;
  }

  .search-box button {
    width: 100%;
  }

  .hero p {
    font-size: 1rem;
  }

  table {
    font-size: 0.9rem;
  }

  th, td {
    padding: 0.5rem 0.75rem;
  }
}

/* ===== 打印样式 ===== */
@media print {
  .site-header,
  .site-footer,
  #backToTop,
  .search-box,
  .btn {
    display: none !important;
  }

  body {
    background: white;
    color: black;
  }

  .container {
    max-width: 100%;
    padding: 0;
  }

  .hero {
    background: none;
    padding: 1rem 0;
    border-radius: 0;
  }

  .card {
    break-inside: avoid;
    box-shadow: none;
    border: 1px solid #ddd;
    background: white;
  }
}

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

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

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

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

/* ===== 选中文本 ===== */
::selection {
  background: var(--btn-bg);
  color: white;
}

/* ===== 焦点可见性 ===== */
:focus-visible {
  outline: 3px solid var(--text-link);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ===== 无障碍辅助 ===== */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* ===== 内容区块间距 ===== */
section {
  margin-bottom: 3rem;
  scroll-margin-top: 100px;
}

section > h2 {
  margin-bottom: 1.5rem;
}

/* ===== 毛玻璃特效增强 ===== */
.glass-effect {
  background: var(--glass-bg);
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
  border: 1px solid var(--glass-border);
  border-radius: 1rem;
}

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

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

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

.slide-in-left {
  animation: slideInLeft 0.6s ease-out;
}

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

.slide-in-right {
  animation: slideInRight 0.6s ease-out;
}

/* ===== 阴影增强 ===== */
.shadow-hover {
  transition: box-shadow var(--transition-speed), transform var(--transition-speed);
}

.shadow-hover:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

/* ===== 圆角卡片细节 ===== */
.rounded-xl {
  border-radius: 1.25rem;
}

.rounded-2xl {
  border-radius: 1.5rem;
}

/* ===== 渐变文字 ===== */
.gradient-text {
  background: linear-gradient(135deg, var(--btn-bg), #7c3aed);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ===== 图片占位符 ===== */
.svg-placeholder {
  background: var(--bg-soft);
  border-radius: 0.75rem;
  min-height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* ===== 徽章样式 ===== */
.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: var(--btn-bg);
  color: white;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 500;
}

.badge-outline {
  background: transparent;
  border: 1px solid var(--text-link);
  color: var(--text-link);
}

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

/* ===== 列表样式 ===== */
.checklist {
  list-style: none;
  padding: 0;
}

.checklist li {
  padding: 0.5rem 0;
  padding-left: 1.75rem;
  position: relative;
}

.checklist li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--btn-bg);
  font-weight: bold;
}

/* ===== 数字统计 ===== */
.stat-number {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-title);
  line-height: 1.2;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* ===== 响应式字体大小 ===== */
@media (min-width: 769px) {
  .container {
    padding: 1.5rem 2rem;
  }
}

/* ===== 暗色模式下的额外调整 ===== */
@media (prefers-color-scheme: dark) {
  .hero {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  }

  .card {
    background: rgba(15, 23, 42, 0.7);
    border-color: rgba(255, 255, 255, 0.08);
  }

  .card:hover {
    border-color: var(--text-link);
  }

  .site-footer {
    background: #0b1120;
  }

  .search-box input {
    background: var(--bg-soft);
    border-color: var(--border-light);
  }

  .search-box input:focus {
    border-color: var(--text-link);
    box-shadow: 0 0 0 3px rgba(147, 197, 253, 0.15);
  }

  .stat-number {
    color: var(--text-title);
  }

  .badge {
    background: var(--btn-bg);
  }
}

/* ===== 性能优化：仅使用 transform 和 opacity 动画 ===== */
@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;
  }
}
```