/* =========================================
   全局基础样式调整 (小白主题风格)
   ========================================= */
body {
    background-color: #f5f6f7; /* 极简的浅灰色背景，让卡片更凸显 */
}

/* 覆盖 Bootstrap 默认导航栏的高度和文字颜色 */
#header {
    border-bottom: 1px solid #eaeaea;
}
.navbar-light .navbar-nav .nav-link {
    color: #333;
    font-weight: 500;
}
.navbar-light .navbar-nav .nav-link:hover {
    color: #009688; /* 悬停时显示青绿色 */
}

/* =========================================
   移动端自定义汉堡菜单图标 (.menuico)
   ========================================= */
.menuico {
    width: 24px;
    height: 18px;
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    margin: 4px;
}
.menuico span {
    display: block;
    height: 2px;
    width: 100%;
    background-color: #333;
    border-radius: 2px;
    transition: all 0.3s ease;
}