```css
/* ===== 阳光影院 全站样式表 ===== */
/* 主题变量 — 默认浅色 + 暗色模式 */
:root {
  --bg-page: #f7f9fc;
  --bg-card: #ffffff;
  --bg-header: #0B1E33;
  --bg-footer: #0B1E33;
  --text-primary: #1F2937;
  --text-title: #0B1E33;
  --text-secondary: #3E4C59;
  --text-link: #1D4ED8;
  --text-button: #ffffff;
  --border-light: #d1d9e6;
  --hover-bg: #e5eaf0;
  --text-faq-q: #1E3A5F;
  --text-faq-a: #243447;
  --text-nav: #f0f6ff;
  --text-muted-dark: #2D3B4A;
  --shadow: 0 8px 20px rgba(0, 0, 0, 0.05);
  --banner-gradient: linear-gradient(135deg, #101f33, #1a2d47);
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(255, 255, 255, 0.3);
  --accent: #F1C40F;
  --accent-soft: rgba(241, 196, 15, 0.15);
  --radius-lg: 20px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  --bg-page: #111a24;
  --bg-card: #1e293b;
  --bg-header: #0a121c;
  --bg-footer: #0a121c;
  --text-primary: #E2E8F0;
  --text-title: #F8FAFC;
  --text-secondary: #B0BEC5;
  --text-link: #93C5FD;
  --text-button: #ffffff;
  --border-light: #334155;
  --hover-bg: #2a394f;
  --text-faq-q: #E2E8F0;
  --text-faq-a: #CBD5E1;
  --text-nav: #E2E8F0;
  --text-muted-dark: #CBD5E1;
  --shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
  --glass-bg: rgba(30, 41, 59, 0.7);
  --glass-border: rgba(255, 255, 255, 0.1);
  --accent-soft: rgba(241, 196, 15, 0.1);
}

/* ===== 基础重置与全局 ===== */
*,
*::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, 'Helvetica Neue', 'Noto Sans', sans-serif;
  background-color: var(--bg-page);
  color: var(--text-primary);
  line-height: 1.7;
  transition: background-color 0.4s ease, color 0.4s ease;
  word-break: break-word;
  min-height: 100vh;
  overflow-x: hidden;
}

/* 滚动条美化 */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-page);
}
::-webkit-scrollbar-thumb {
  background: var(--accent);
  border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
  background: #d4a017;
}

/* ===== 标题与段落 ===== */
h1, h2, h3, h4, h5 {
  font-weight: 700;
  color: var(--text-title);
  line-height: 1.3;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(1.8rem, 4vw, 2.2rem);
  margin-bottom: 1rem;
  position: relative;
  display: inline-block;
}

h1::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 60px;
  height: 3px;
  background: var(--accent);
  border-radius: 2px;
}

h2 {
  font-size: clamp(1.5rem, 3vw, 1.9rem);
  margin: 2rem 0 1rem;
  border-left: 6px solid var(--accent);
  padding-left: 1rem;
  position: relative;
}

h3 {
  font-size: clamp(1.2rem, 2.5vw, 1.4rem);
  margin: 1.5rem 0 0.8rem;
}

h4 {
  font-size: clamp(1.1rem, 2vw, 1.2rem);
  margin: 1rem 0 0.5rem;
}

p {
  margin-bottom: 1rem;
  color: var(--text-primary);
  font-weight: 400;
  line-height: 1.8;
}

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

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

/* ===== 容器 ===== */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
  width: 100%;
}

/* ===== 头部导航 ===== */
.site-header {
  background-color: var(--bg-header);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.12);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  padding: 0.8rem 0;
  gap: 0.5rem;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.logo-icon {
  font-size: 2rem;
  filter: drop-shadow(0 0 8px rgba(241, 196, 15, 0.5));
  animation: pulse 3s infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

.logo-text {
  color: #ffffff;
  font-size: clamp(1.3rem, 2.5vw, 1.8rem);
  font-weight: 700;
  letter-spacing: 1px;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.logo-text span {
  color: var(--accent);
}

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

.nav-links a {
  color: var(--text-nav);
  font-weight: 500;
  font-size: 1.05rem;
  padding: 0.4rem 0.2rem;
  border-bottom: 2px solid transparent;
  transition: all 0.3s ease;
  position: relative;
}

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

.nav-links a:hover {
  border-bottom-color: transparent;
  color: var(--accent);
  text-decoration: none;
}

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

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.search-box {
  display: flex;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 40px;
  padding: 0.15rem 0.15rem 0.15rem 1rem;
  border: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(5px);
  transition: all 0.3s ease;
}

.search-box:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(241, 196, 15, 0.2);
}

.search-box input {
  background: transparent;
  border: none;
  color: #fff;
  padding: 0.4rem;
  outline: none;
  font-size: 0.95rem;
  width: 140px;
  transition: width 0.3s ease;
}

.search-box input::placeholder {
  color: #d1dbe6;
  opacity: 0.8;
}

.search-box input:focus {
  width: 180px;
}

.search-btn {
  background: var(--accent);
  border: none;
  border-radius: 40px;
  padding: 0.3rem 1.2rem;
  font-weight: 600;
  color: #0B1E33;
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 0.9rem;
}

.search-btn:hover {
  background: #d4a017;
  transform: scale(1.05);
}

.theme-toggle {
  background: none;
  border: 2px solid var(--accent);
  color: var(--accent);
  border-radius: 20px;
  padding: 0.2rem 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 1rem;
}

.theme-toggle:hover {
  background: var(--accent);
  color: #0B1E33;
  transform: scale(1.05);
}

.mobile-menu {
  display: none;
  background: none;
  border: none;
  font-size: 2rem;
  color: #fff;
  cursor: pointer;
  padding: 0.2rem 0.5rem;
  border-radius: 8px;
  transition: all 0.3s ease;
}

.mobile-menu:hover {
  background: rgba(255, 255, 255, 0.1);
}

/* 移动导航 */
#mobileNav {
  display: none;
  background: var(--bg-header);
  padding: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  animation: slideDown 0.3s ease;
}

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

#mobileNav a {
  color: #fff;
  padding: 0.6rem 1rem;
  border-radius: 8px;
  transition: all 0.3s ease;
  font-size: 1.05rem;
}

#mobileNav a:hover {
  background: rgba(241, 196, 15, 0.1);
  color: var(--accent);
  text-decoration: none;
}

/* ===== Banner ===== */
.banner {
  background: var(--banner-gradient);
  color: white;
  padding: clamp(2rem, 5vw, 3.5rem) clamp(1.5rem, 4vw, 3rem);
  margin: 1.5rem 0;
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
  min-height: 280px;
  display: flex;
  align-items: center;
  animation: fadeInUp 0.8s ease;
}

.banner::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 60%;
  height: 200%;
  background: radial-gradient(circle, rgba(241, 196, 15, 0.1) 0%, transparent 70%);
  pointer-events: none;
}

.banner::after {
  content: '';
  position: absolute;
  bottom: -20%;
  left: -10%;
  width: 40%;
  height: 100%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.05) 0%, transparent 70%);
  pointer-events: none;
}

.banner-content {
  max-width: 700px;
  position: relative;
  z-index: 1;
}

.banner h2 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  color: #fff;
  border-left: none;
  margin-top: 0;
  margin-bottom: 1rem;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.banner p {
  color: #f0f4fa;
  font-size: clamp(1rem, 2vw, 1.2rem);
  text-shadow: 0 1px 10px rgba(0, 0, 0, 0.2);
}

.banner .btn {
  display: inline-block;
  background: var(--accent);
  color: #0B1E33;
  padding: 0.8rem 2.5rem;
  border-radius: 50px;
  font-weight: 700;
  margin-top: 1.2rem;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(241, 196, 15, 0.4);
  border: none;
  cursor: pointer;
  font-size: 1.05rem;
}

.banner .btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(241, 196, 15, 0.5);
  background: #d4a017;
  text-decoration: none;
}

/* ===== 区块 ===== */
.section {
  margin: 2rem 0;
  animation: fadeInUp 0.6s ease;
}

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

/* ===== 卡片网格 ===== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.8rem;
  margin: 2rem 0;
}

.card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 1.8rem 1.5rem;
  box-shadow: var(--shadow);
  border: 1px solid var(--border-light);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), transparent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.1);
}

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

.card h3 {
  margin-bottom: 0.5rem;
  font-size: 1.3rem;
}

.card p {
  color: var(--text-primary);
  font-size: 1rem;
  line-height: 1.7;
}

.card .more-link {
  color: var(--text-link);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: all 0.3s ease;
  margin-top: 0.5rem;
}

.card .more-link:hover {
  gap: 8px;
  color: var(--accent);
  text-decoration: none;
}

/* ===== 徽章 ===== */
.badge {
  background: var(--accent-soft);
  color: var(--accent);
  padding: 0.2rem 1rem;
  border-radius: 30px;
  font-size: 0.85rem;
  font-weight: 600;
  display: inline-block;
  margin-bottom: 0.8rem;
  border: 1px solid rgba(241, 196, 15, 0.3);
  letter-spacing: 0.3px;
}

/* ===== 文章列表 ===== */
.article-list {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.article-item {
  border-bottom: 1px solid var(--border-light);
  padding-bottom: 1.8rem;
  transition: padding-left 0.3s ease;
  animation: fadeInUp 0.5s ease;
}

.article-item:hover {
  padding-left: 1rem;
}

.article-item h4 {
  font-size: clamp(1.2rem, 2.5vw, 1.5rem);
  transition: color 0.3s ease;
  margin-bottom: 0.5rem;
}

.article-item:hover h4 {
  color: var(--accent);
}

.article-item .meta {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 0.8rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

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

.article-item > a {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-weight: 600;
  transition: all 0.3s ease;
}

.article-item > a:hover {
  gap: 8px;
  color: var(--accent);
  text-decoration: none;
}

/* ===== FAQ / HowTo ===== */
.faq-block,
.howto-block {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: clamp(1.5rem, 3vw, 2.5rem);
  margin: 2rem 0;
  box-shadow: var(--shadow);
  border: 1px solid var(--border-light);
}

details {
  background: var(--bg-page);
  padding: 1rem 1.5rem;
  border-radius: var(--radius-sm);
  margin-bottom: 0.8rem;
  border: 1px solid var(--border-light);
  transition: all 0.3s ease;
  overflow: hidden;
}

details:hover {
  border-color: var(--accent);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

details[open] {
  border-color: var(--accent);
  background: var(--accent-soft);
}

summary {
  font-weight: 600;
  cursor: pointer;
  color: var(--text-faq-q);
  font-size: 1.05rem;
  list-style: none;
  position: relative;
  padding-left: 1.5rem;
  transition: color 0.3s ease;
}

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

summary::before {
  content: '▸';
  position: absolute;
  left: 0;
  top: 0;
  color: var(--accent);
  transition: transform 0.3s ease;
}

details[open] summary::before {
  transform: rotate(90deg);
}

details[open] summary {
  color: var(--accent);
}

details p {
  margin-top: 0.8rem;
  color: var(--text-faq-a);
  padding-top: 0.8rem;
  border-top: 1px solid var(--border-light);
  animation: fadeIn 0.3s ease;
}

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

/* ===== HowTo 列表 ===== */
.howto-block ol {
  margin-left: 1.2rem;
  color: var(--text-primary);
  counter-reset: howto;
}

.howto-block ol li {
  padding: 0.6rem 0;
  border-bottom: 1px dashed var(--border-light);
  position: relative;
  padding-left: 0.5rem;
  transition: padding-left 0.3s ease;
}

.howto-block ol li:hover {
  padding-left: 1rem;
  color: var(--accent);
}

.howto-block ol li:last-child {
  border-bottom: none;
}

/* ===== 联系/关于区块 ===== */
#contact {
  background: var(--bg-card);
  padding: clamp(1.5rem, 3vw, 2.5rem);
  border-radius: var(--radius-lg);
  margin: 2rem 0;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow);
}

#contact address {
  font-style: normal;
  margin-top: 1rem;
  padding: 1rem;
  background: var(--bg-page);
  border-radius: var(--radius-sm);
  border-left: 4px solid var(--accent);
  line-height: 2;
}

/* ===== 页脚 ===== */
.site-footer {
  background-color: var(--bg-footer);
  color: #d0ddee;
  padding: 2.5rem 0;
  margin-top: 2rem;
  border-radius: 24px 24px 0 0;
  position: relative;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 2rem;
}

.site-footer h3,
.site-footer h4 {
  color: #ffffff;
  margin-bottom: 1rem;
  font-size: 1.1rem;
}

.site-footer a {
  color: #bcd0f0;
  transition: color 0.3s ease;
  padding: 0.2rem 0;
}

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

.footer-bottom {
  border-top: 1px solid #2a3a55;
  margin-top: 2rem;
  padding-top: 1.2rem;
  text-align: center;
  font-size: 0.9rem;
  color: #c0d0ea;
}

.footer-bottom p {
  color: #c0d0ea;
  margin-bottom: 0.3rem;
}

/* ===== 返回顶部按钮 ===== */
.back-to-top {
  position: fixed;
  right: 20px;
  bottom: 20px;
  background: var(--bg-header);
  color: #fff;
  border: 2px solid var(--accent);
  padding: 10px 16px;
  border-radius: 40px;
  font-weight: bold;
  cursor: pointer;
  z-index: 999;
  font-size: 1.2rem;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
}

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

.back-to-top:hover {
  background: var(--accent);
  color: #0B1E33;
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(241, 196, 15, 0.4);
}

/* ===== 按钮 ===== */
.btn-primary {
  background: var(--accent);
  color: #0B1E33;
  border: none;
  padding: 0.6rem 1.8rem;
  border-radius: 40px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 1rem;
}

.btn-primary:hover {
  background: #d4a017;
  transform: scale(1.05);
  box-shadow: 0 4px 15px rgba(241, 196, 15, 0.3);
}

/* ===== 面包屑 ===== */
nav[aria-label="面包屑"] {
  margin: 1.5rem 0 0.2rem;
}

nav[aria-label="面包屑"] ol {
  list-style: none;
  display: flex;
  gap: 0.5rem;
  font-size: 0.95rem;
  flex-wrap: wrap;
  color: var(--text-secondary);
}

nav[aria-label="面包屑"] a {
  color: var(--text-link);
  transition: color 0.3s ease;
}

nav[aria-label="面包屑"] a:hover {
  color: var(--accent);
  text-decoration: none;
}

/* 面包屑下面的一句话描述 */
main > p:first-of-type {
  font-size: 1.1rem;
  background: var(--bg-card);
  padding: 0.8rem 1.2rem;
  border-radius: var(--radius-sm);
  border-left: 6px solid var(--accent);
  box-shadow: var(--shadow);
  margin-bottom: 1.5rem;
}

/* ===== 图片懒加载 ===== */
img[lazy] {
  background: linear-gradient(135deg, var(--bg-page), var(--border-light));
  min-height: 100px;
}

/* ===== 辅助 ===== */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ===== 数字动画 ===== */
.stat-number {
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent);
  display: inline-block;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .card-grid {
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.2rem;
  }
  
  .nav-links {
    gap: 1rem;
  }
}

@media (max-width: 800px) {
  .nav-links,
  .header-actions .search-box {
    display: none;
  }
  
  .mobile-menu {
    display: block;
  }
  
  .header-inner {
    flex-wrap: nowrap;
    padding: 0.6rem 0;
  }
  
  .logo-text {
    font-size: 1.3rem;
  }
  
  .header-actions {
    gap: 0.5rem;
  }
  
  .banner {
    padding: 2rem 1.5rem;
    min-height: 220px;
  }
  
  .banner h2 {
    font-size: 1.8rem;
  }
  
  .card-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .article-item:hover {
    padding-left: 0;
  }
  
  .site-footer {
    border-radius: 16px 16px 0 0;
    padding: 2rem 0;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
    text-align: center;
  }
  
  .back-to-top {
    right: 15px;
    bottom: 15px;
    padding: 8px 14px;
    font-size: 1rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 15px;
  }
  
  h1 {
    font-size: 1.6rem;
  }
  
  h2 {
    font-size: 1.4rem;
    padding-left: 0.8rem;
  }
  
  .banner {
    padding: 1.5rem 1rem;
    border-radius: 16px;
  }
  
  .banner h2 {
    font-size: 1.5rem;
  }
  
  .banner .btn {
    padding: 0.6rem 1.8rem;
    font-size: 0.95rem;
  }
  
  .card {
    padding: 1.2rem;
  }
  
  .faq-block,
  .howto-block,
  #contact {
    padding: 1.2rem;
    border-radius: 16px;
  }
  
  details {
    padding: 0.8rem 1rem;
  }
  
  .logo-icon {
    font-size: 1.6rem;
  }
  
  .logo-text {
    font-size: 1.1rem;
  }
  
  .theme-toggle {
    padding: 0.15rem 0.6rem;
    font-size: 0.9rem;
  }
}

/* 打印样式 */
@media print {
  .site-header,
  .banner,
  .back-to-top,
  .site-footer {
    display: none !important;
  }
  
  body {
    background: #fff;
    color: #000;
  }
}

/* 性能优化：减少重绘 */
.card,
.banner,
.article-item,
details {
  will-change: transform;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 滚动动画增强 */
@media (prefers-reduced-motion: no-preference) {
  .card,
  .article-item,
  .faq-block,
  .howto-block,
  #contact {
    animation: fadeInUp 0.6s ease both;
    animation-timeline: view();
    animation-range: entry 0% entry 40%;
  }
}
```