/* 品鉴影视 - UI Style: 温暖舒适 (15) */
/* Layout Variant: A */

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
  background: #f5f5f5;
  color: #333;
  line-height: 1.6;
}

header {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  padding: 1rem 0;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.logo {
  color: #fff;
  font-size: 1.5rem;
  font-weight: bold;
  text-align: center;
  padding: 0.5rem 0;
  margin: 0;
}

nav ul {
  list-style: none;
  margin: 0;
  padding: 0 1rem;
  display: flex;
  flex-wrap: nowrap;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
}

nav ul li {
  flex: 1 1 0;
  min-width: 0;
  text-align: center;
}

nav a {
  color: #fff;
  text-decoration: none;
  padding: 0.5rem;
  display: block;
  border-radius: 4px;
  transition: background 0.3s, transform 0.2s;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

nav a:hover {
  background: rgba(255,255,255,0.2);
  transform: translateY(-2px);
}

main {
  min-height: 60vh;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-weight: 600;
  line-height: 1.3;
}

a {
  transition: color 0.3s;
}

a:hover {
  color: #764ba2;
}

button {
  cursor: pointer;
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: 4px;
  font-size: 1rem;
  transition: all 0.3s;
}

button:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.card {
  background: #fff;
  border-radius: 8px;
  padding: 1.5rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
  transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 4px 16px rgba(0,0,0,0.12);
}

@media (max-width: 768px) {
  nav ul {
    padding: 0 0.5rem;
  }

  nav a {
    font-size: 0.85rem;
    padding: 0.4rem 0.3rem;
  }

  .logo {
    font-size: 1.2rem;
  }

  main {
    padding: 0 0.5rem !important;
  }
}

@media (max-width: 480px) {
  nav a {
    font-size: 0.75rem;
    padding: 0.3rem 0.2rem;
  }
}

/* 返回顶部按钮 */
#backToTop {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: #fff;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: none;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
  transition: all 0.3s;
  z-index: 999;
}

#backToTop:hover {
  transform: translateY(-4px);
  box-shadow: 0 6px 16px rgba(0,0,0,0.4);
}

#backToTop.show {
  display: flex;
}