Bootstrap 3忽略列宽

Question

我的表的开始如下，但是，列宽除了我要指定的内容以外都没有。有什么想法吗？

如果我添加以下内容，则所有列均会平均分配，而是具有我要指定的宽度

table {
table-layout: fixed;
word-wrap: break-word;
}

代码

<div class="table-responsive">
            <table class="table table-bordered table-striped table-hover">
                <thead>
                    <tr>
                        <th colspan="3" class="info" style="width:800px !important;"></th>
                        <th colspan="18" class="text-center success" style="border-bottom:1px black solid !important; width: 1800px !important;">Actuals</th>
                    </tr>
                    <tr>
                        <th rowspan="2" class="info" style="width:100px !important;"></th>
                        <th rowspan="2" class="info" style="width:100px !important;">Measure Type</th>
                        <th rowspan="2" class="info border-right" style="width:600px !important;">Measure</th>
                        <th colspan="3" class="success border-right border-bottom" style="width:300px !important;">October 18</th>
                        <th colspan="3" class="success border-right border-bottom" style="width:300px !important;">November 18</th>
                        <th colspan="3" class="success border-right border-bottom" style="width:300px !important;">December 18</th>
                        <th colspan="3" class="success border-right border-bottom" style="width:300px !important;">January 19</th>
                        <th colspan="3" class="success border-right border-bottom" style="width:300px !important;">February 19</th>
                        <th colspan="3" class="success border-right border-bottom" style="width:300px !important;">March 19</th>
                    </tr>
                    <tr class="success">
                        <th class="border-bottom border-right" style="width:100px !important;">Target</th>
                        <th class="border-bottom border-right" style="width:100px !important;">Actual</th>
                        <th class="border-bottom border-right" style="width:100px !important;">RAG Status</th>
                        <th class="border-bottom border-right" style="width:100px !important;">Target</th>
                        <th class="border-bottom border-right" style="width:100px !important;">Actual</th>
                        <th class="border-bottom border-right" style="width:100px !important;">RAG Status</th>
                        <th class="border-bottom border-right" style="width:100px !important;">Target</th>
                        <th class="border-bottom border-right" style="width:100px !important;">Actual</th>
                        <th class="border-bottom border-right" style="width:100px !important;">RAG Status</th>
                        <th class="border-bottom border-right" style="width:100px !important;">Target</th>
                        <th class="border-bottom border-right" style="width:100px !important;">Actual</th>
                        <th class="border-bottom border-right" style="width:100px !important;">RAG Status</th>
                        <th class="border-bottom border-right" style="width:100px !important;">Target</th>
                        <th class="border-bottom border-right" style="width:100px !important;">Actual</th>
                        <th class="border-bottom border-right" style="width:100px !important;">RAG Status</th>
                        <th class="border-bottom border-right" style="width:100px !important;">Target</th>
                        <th class="border-bottom border-right" style="width:100px !important;">Actual</th>
                        <th class="border-bottom border-right" style="width:100px !important;">RAG Status</th>
                    </tr>
                </thead>