.the-header{
    height: 50px;
    position: sticky;
}

.header-container{
    height: 50px;
    min-height: 50px;
    background-color: #1b8dde;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    position: relative;
    z-index: 999;
}

.header-title{
    margin-right: 50px;
}

.the-navigater{
    margin-right: 60px;
    text-align: center;
}

.the-navigater a{
    color: #fff !important;
    position: relative;
    text-decoration: none;
    display: inline-block;
    /* 添加平滑过渡效果 */
    transition: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    /* 添加阴影效果，增强弹起感 */
    text-shadow: 0 1px 0 rgba(0, 0, 0, 0.1);
    /* 初始位置 */
    transform: translateY(0);
    font-weight: bold;  
}

.the-navigater a:hover {
    color: #f0f0f0 !important;
    /* 使用更平滑的弹起动画 */
    transform: translateY(-5px);
    /* 添加阴影效果，增强立体感 */
    text-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

/* 添加下划线动画效果 */
.the-navigater a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%; /* 从中间开始 */
    width: 0;
    height: 2px;
    background-color: #fff;
    transition: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    transform: translateX(-50%); /* 居中对齐 */
    border-radius: 2px;
}

.the-navigater a:hover::after {
    width: 100%; /* 鼠标悬停时下划线展开到全宽 */
    left: 0; /* 展开后从左边开始 */
    transform: translateX(0); /* 重置变换 */
}

.sign-div{
    color: #fff;
}

.btn-login {
    background-color: #e91f00; 
    color: white;
    border: none;
    padding: 8px 16px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 14px;
    margin: 4px 2px;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.btn-register {
    background-color: #e91f00;
    color: white;
    border: none;
    padding: 8px 16px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 14px;
    margin: 4px 2px;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.btn-login:hover {
    background-color: #ab2915;
    transform: translateY(-2px);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.btn-register:hover {   
    background-color: #ab2915;
    transform: translateY(-2px);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}