.w120 {
    width: 120px;
}
.w320 {
    width: 320px;
}
.top_title {
    height: 38px;
    border: 1px solid rgba(34, 36, 38, 0.15);
}
.head_row {
    line-height: 38px;
    width: 1200px;
    margin: auto;
}
.c_blue {
    color: blue;
}
.header {
    background-color: #333;
    color: white;
    padding: 10px 0;
}

.navbar {
    width: 100%;
    margin: 0 auto;
}

.main_navbar {
    width: 80%;
    margin: 0 auto;
}

.nav-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    justify-content: start;
}

.nav-item {
    margin-right: 20px;
    line-height: 50px;
}

.nav-item a {
    text-decoration: none;
    color: white;
    font-weight: bold;
}

.nav-item a:hover,
.nav-item a:active {
    color: #ddd;
}

.nav-item.active a {
    color: #4CAF50; /* 选中项的颜色为绿色，你可以根据实际需要调整此颜色 */
}

/* 添加响应式设计以改进移动显示 */
@media (max-width: 600px) {
    .navbar {
        width: 100%;
    }

    .nav-list {
        justify-content: center;
    }

    .nav-item {
        margin-right: 10px;
    }
}
.username {
    display: block;
    position: absolute;
    top: 25px;
    right: 10%;
}
.username_quit {
    color: #4CAF50;
}
.table-responsive {
    width: 100%;
    overflow: hidden;
}