/* Header 样式 */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 20px;
  background-color: #6b4f3b; /* 深棕色背景 */
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

/* Logo 和网站名称 */
.logo-and-name {
  display: flex;
  align-items: center;
}

.logo {
  height: 40px;
  margin-right: 10px;
}

.site-name {
  font-size: 32px;
  font-weight: bold;
  color: #fbf2e3; /* 柔和淡米色字体 */
}

/* 用户头像和消息中心 */
.user-and-message {
  display: flex;
  align-items: center;
}

.user-avatar {
  height: 50px;
  width: 50px;
  border-radius: 50%;
  margin-right: 10px;
}

.message-center {
  font-size: 24px;
  color: #fbf2e3;
  cursor: pointer;
  transition: color 0.3s ease;
}

.message-center:hover {
  color: #eecfc1; /* 清透粉 hover */
}

/* 导航栏样式 */
.nav {
  display: flex;
  justify-content: center;
  background-color: #fffaf7; /* 粉米底 */
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.05);
  border-bottom: 2px solid #e2cfc3;
}

/* 每个导航项 */
.nav-item {
  padding: 14px 12px;
  text-decoration: none;
  color: #6b4f3b; /* 主文字棕色 */
  font-size: 18px;
  font-weight: 500;
  text-align: center;
  border-radius: 8px;
  transition: background-color 0.3s, color 0.3s, transform 0.3s ease;
  position: relative;
}

.nav-item:hover {
  background-color: #f3ded7; /* 柔粉 hover 背景 */
  color: #4b3325;
  transform: scale(1.05);
}

/* 选中状态 */
.nav-item.active {
  background-color: #eecfc1;
  color: #3c271b;
  font-weight: bold;
  border-radius: 16px;
  padding: 4px 12px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.08);
  transform: scale(1.1);
  line-height: 40px;
}

/* 新手指南按钮 */
.guide-button {
  display: flex;
  align-items: center;
  background-color: #eecfc1; /* 清透粉底色 */
  color: #4e342e; /* 深棕文字 */
  border: none;
  border-radius: 20px;
  padding: 6px 12px;
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.3s ease, transform 0.2s ease;
}

.guide-button:hover {
  background-color: #f3ded7; /* 更柔和 hover */
  transform: scale(1.05);
}

.guide-button span {
  user-select: none;
}