/* style.css - 西瓜影院 */
:root {
  --primary: #ff6b35;
  --primary-dark: #e55a2b;
  --bg: #f8f9fa;
  --bg-card: #ffffff;
  --text: #333333;
  --text-light: #666666;
  --shadow: 0 4px 20px rgba(0,0,0,0.08);
  --radius: 16px;
  --transition: 0.3s ease;
}
[data-theme="dark"] {
  --bg: #1a1a2e;
  --bg-card: #16213e;
  --text: #e0e0e0;
  --text-light: #a0a0a0;
  --shadow: 0 4px 20px rgba(0,0,0,0.4);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  transition: background var(--transition), color var(--transition);
}
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0,0,0,0.05);
  padding: 0 20px;
}
[data-theme="dark"] header {
  background: rgba(26,26,46,0.85);
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
nav {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}
.logo {
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary), #ff9a56);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.nav-links {
  display: flex;
  list-style: none;
  gap: 24px;
}
.nav-links a {
  text-decoration: none;
  color: var(--text);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color var(--transition);
}
.nav-links a:hover { color: var(--primary); }
.menu-toggle, .dark-mode-toggle {
  background: none;
  border: none;
  font-size: 1.4rem;
  cursor: pointer;
  color: var(--text);
  display: none;
}
.dark-mode-toggle { display: block; }
@media (max-width: 768px) {
  .nav-links { display: none; }
  .menu-toggle { display: block; }
  .nav-links.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(20px);
    padding: 20px;
    gap: 16px;
    border-bottom: 1px solid rgba(0,0,0,0.05);
  }
  [data-theme="dark"] .nav-links.active {
    background: rgba(26,26,46,0.95);
  }
}
.banner {
  padding: 120px 20px 80px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  text-align: center;
  color: #fff;
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
}
.banner-content h1 {
  font-size: 3rem;
  margin-bottom: 16px;
  text-shadow: 0 2px 10px rgba(0,0,0,0.2);
}
.banner-content p {
  font-size: 1.2rem;
  opacity: 0.9;
  margin-bottom: 30px;
}
.search-box {
  display: flex;
  max-width: 500px;
  margin: 0 auto;
  gap: 0;
  border-radius: 50px;
  overflow: hidden;
  box-shadow: 0 8px 30px rgba(0,0,0,0.2);
}
.search-box input {
  flex: 1;
  padding: 16px 24px;
  border: none;
  outline: none;
  font-size: 1rem;
  background: #fff;
  color: #333;
}
.search-box button {
  padding: 16px 32px;
  border: none;
  background: var(--primary);
  color: #fff;
  font-size: 1rem;
  cursor: pointer;
  transition: background var(--transition);
}
.search-box button:hover { background: var(--primary-dark); }
.breadcrumb {
  max-width: 1200px;
  margin: 20px auto;
  padding: 0 20px;
  font-size: 0.9rem;
  color: var(--text-light);
}
.breadcrumb a { color: var(--primary); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb-sub {
  margin-top: 16px;
  font-size: 0.85rem;
  color: var(--text-light);
}
.breadcrumb-sub a { color: var(--primary); text-decoration: none; }
section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 60px 20px;
}
h2 {
  font-size: 2rem;
  margin-bottom: 32px;
  position: relative;
  display: inline-block;
}
h2::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: linear-gradient(135deg, var(--primary), #ff9a56);
  border-radius: 2px;
  margin-top: 8px;
}
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}
.card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform 0.3s, box-shadow 0.3s;
}
.card:hover { transform: translateY(-4px); box-shadow: 0 8px 30px rgba(0,0,0,0.12); }
.card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
}
.card-body {
  padding: 20px;
}
.card-body h3 {
  font-size: 1.2rem;
  margin-bottom: 8px;
}
.card-body p {
  color: var(--text-light);
  font-size: 0.95rem;
  margin-bottom: 12px;
}
.card-link {
  display: inline-block;
  padding: 8px 20px;
  background: linear-gradient(135deg, var(--primary), #ff9a56);
  color: #fff;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
  transition: opacity 0.3s;
}
.card-link:hover { opacity: 0.9; }
.ranking-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.ranking-item {
  display: flex;
  align-items: center;
  gap: 20px;
  background: var(--bg-card);
  padding: 16px 24px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.rank-num {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--primary);
  min-width: 40px;
}
.rank-info h3 { font-size: 1.1rem; margin-bottom: 4px; }
.rank-info p { color: var(--text-light); font-size: 0.9rem; }
.rank-info a { color: var(--primary); text-decoration: none; font-weight: 500; }
.category-tags, .tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.tag {
  padding: 8px 20px;
  background: var(--bg-card);
  border-radius: 50px;
  text-decoration: none;
  color: var(--text);
  box-shadow: var(--shadow);
  font-size: 0.9rem;
  transition: background 0.3s, color 0.3s;
}
.tag:hover {
  background: var(--primary);
  color: #fff;
}
.news-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.news-item {
  background: var(--bg-card);
  padding: 20px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.news-item h3 a { color: var(--text); text-decoration: none; }
.news-item h3 a:hover { color: var(--primary); }
.news-item p { color: var(--text-light); margin: 8px 0; }
.news-item time { font-size: 0.85rem; color: var(--text-light); }
.about-content p {
  margin-bottom: 16px;
  line-height: 1.8;
  color: var(--text-light);
}
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.faq-item {
  background: var(--bg-card);
  padding: 20px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.faq-item h3 { font-size: 1.1rem; margin-bottom: 8px; cursor: pointer; }
.faq-item p { color: var(--text-light); }
.friend-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}
.friend-links a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 500;
}
.friend-links a:hover { text-decoration: underline; }
footer {
  background: var(--bg-card);
  padding: 40px 20px;
  text-align: center;
  border-top: 1px solid rgba(0,0,0,0.05);
}
[data-theme="dark"] footer {
  border-top: 1px solid rgba(255,255,255,0.05);
}
.footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
  margin-bottom: 20px;
}
.footer-nav a {
  color: var(--text);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
}
.footer-nav a:hover { color: var(--primary); }
.footer-info p {
  color: var(--text-light);
  font-size: 0.85rem;
  margin-bottom: 8px;
}
#backToTop {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  box-shadow: 0 4px 15px rgba(0,0,0,0.2);
  display: none;
  z-index: 999;
  transition: opacity 0.3s;
}
#backToTop:hover { opacity: 0.9; }
@media (max-width: 480px) {
  .banner-content h1 { font-size: 2rem; }
  .banner-content p { font-size: 1rem; }
  .card-grid { grid-template-columns: 1fr; }
  section { padding: 40px 16px; }
}
/* 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);
}