/* 通用样式 */
body {
  margin: 0;
  padding: 0;
  font-family: 'Noto Sans SC', sans-serif;
  background: #f7f7f7;
  color: #333;
}

/* 顶部导航栏 */
header nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: white;
  border-bottom: 1px solid #ddd;
  padding: 10px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 10;
  box-sizing: border-box;
  max-width: 100vw;
}

header nav h1 {
  font-size: 1.2rem;
  margin: 0;
  cursor: pointer;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

header nav a {
  text-decoration: none;
  color: #a083ea;
  font-weight: bold;
  white-space: nowrap;
}

/* 主体容器 */
main#container {
  padding: 70px 16px 80px 16px;
  max-width: 700px;
  margin: 0 auto;
  box-sizing: border-box;
}

/* 卡片式书籍条目 */
.card {
  display: flex;
  flex-direction: row;
  background: white;
  border-radius: 12px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.08);
  margin-bottom: 24px;
  overflow: hidden;
  cursor: pointer;
  transition: transform 0.2s;
}

.card:hover {
  transform: translateY(-2px);
}

.card img {
  width: 120px;
  height: auto;
  object-fit: cover;
  flex-shrink: 0;
}

.card-content {
  padding: 16px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.card-content h2 {
  font-size: 1.1rem;
  margin: 0 0 8px;
}

.card-content p {
  font-size: 0.95rem;
  color: #555;
  line-height: 1.6;
}

/* 章节页面头部 */
.chapter-header {
  margin-bottom: 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.chapter-select {
  padding: 6px;
  font-size: 0.95rem;
  max-width: 100%;
}

/* 章节内容展示 */
.chapter-content {
  background: white;
  padding: 20px;
  border-radius: 12px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
  white-space: pre-wrap;
  word-wrap: break-word;
  line-height: 1.8;
  font-size: 1rem;
}

/* 底部章节导航 */
#chapter-nav {
  display: flex;
  justify-content: space-between;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: white;
  padding: 10px 16px;
  border-top: 1px solid #ccc;
  box-shadow: 0 -1px 4px rgba(0, 0, 0, 0.06);
  box-sizing: border-box;
  max-width: 100vw;
}

#chapter-nav button {
  background: #ea83c8;
  color: white;
  border: none;
  padding: 8px 16px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.95rem;
  flex-shrink: 1;
}

#chapter-nav button:hover {
  background: #ea83c8;
}

.hidden {
  display: none !important;
  visibility: hidden;
  opacity: 0;
  pointer-events: none;
}


/* 响应式调整 */
@media (max-width: 600px) {
  .card {
    flex-direction: column;
  }
  .card img {
    width: 100%;
    height: auto;
  }
  .card-content h2 {
    font-size: 1rem;
  }
  .card-content p {
    font-size: 0.88rem;
  }
  .chapter-content {
    font-size: 0.95rem;
  }
  #chapter-nav button {
    font-size: 0.9rem;
    padding: 6px 12px;
  }
  .chapter-header {
    flex-direction: column;
    align-items: flex-start;
  }
}