/* Bootstrap v4.6.0 核心样式简化版 */
/* 确保基本布局和组件样式可用 */

/* 基础重置 */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* 网格系统简化 */
.container, .container-fluid {
    width: 100%;
    padding-right: 15px;
    padding-left: 15px;
    margin-right: auto;
    margin-left: auto;
}

@media (min-width: 576px) {
    .container {
        max-width: 540px;
    }
}

@media (min-width: 768px) {
    .container {
        max-width: 720px;
    }
}

@media (min-width: 992px) {
    .container {
        max-width: 960px;
    }
}

@media (min-width: 1200px) {
    .container {
        max-width: 1140px;
    }
}

/* 行和列 */
.row {
    display: flex;
    flex-wrap: wrap;
    margin-right: -15px;
    margin-left: -15px;
}

.col-md-4, .col-md-6, .col-md-8 {
    position: relative;
    width: 100%;
    padding-right: 15px;
    padding-left: 15px;
}

@media (min-width: 768px) {
    .col-md-4 {
        flex: 0 0 33.333333%;
        max-width: 33.333333%;
    }
    
    .col-md-6 {
        flex: 0 0 50%;
        max-width: 50%;
    }
    
    .col-md-8 {
        flex: 0 0 66.666667%;
        max-width: 66.666667%;
    }
}

/* 表格样式 */
.table {
    width: 100%;
    margin-bottom: 1rem;
    color: #212529;
    border-collapse: collapse;
}

.table th, .table td {
    padding: 0.75rem;
    vertical-align: top;
    border-top: 1px solid #dee2e6;
}

.table thead th {
    vertical-align: bottom;
    border-bottom: 2px solid #dee2e6;
}

.table-hover tbody tr:hover {
    color: #212529;
    background-color: rgba(0, 0, 0, 0.075);
}

.table-responsive {
    display: block;
    width: 100%;
    overflow-x: auto;
}

/* 卡片样式 */
.card {
    position: relative;
    display: flex;
    flex-direction: column;
    min-width: 0;
    word-wrap: break-word;
    background-color: #fff;
    background-clip: border-box;
    border: 1px solid rgba(0, 0, 0, 0.125);
    border-radius: 0.25rem;
    margin-bottom: 1rem;
}

.card-header {
    padding: 0.75rem 1.25rem;
    margin-bottom: 0;
    background-color: rgba(0, 0, 0, 0.03);
    border-bottom: 1px solid rgba(0, 0, 0, 0.125);
}

.card-body {
    flex: 1 1 auto;
    min-height: 1px;
    padding: 1.25rem;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    font-weight: 400;
    color: #212529;
    text-align: center;
    vertical-align: middle;
    cursor: pointer;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    background-color: transparent;
    border: 1px solid transparent;
    padding: 0.375rem 0.75rem;
    font-size: 1rem;
    line-height: 1.5;
    border-radius: 0.25rem;
    transition: color 0.15s ease-in-out, background-color 0.15s ease-in-out, border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
    margin-right: 0.5rem;
    margin-bottom: 0.5rem;
}

.btn-primary {
    color: #fff;
    background-color: #007bff;
    border-color: #007bff;
}

.btn-secondary {
    color: #fff;
    background-color: #6c757d;
    border-color: #6c757d;
}

.btn-danger {
    color: #fff;
    background-color: #dc3545;
    border-color: #dc3545;
}

.btn-sm {
    padding: 0.25rem 0.5rem;
    font-size: 0.875rem;
    line-height: 1.5;
    border-radius: 0.2rem;
}

/* 表单样式 */
.form-group {
    margin-bottom: 1rem;
}

.form-label {
    display: inline-block;
    margin-bottom: 0.5rem;
}

.form-control {
    display: block;
    width: 100%;
    height: calc(1.5em + 0.75rem + 2px);
    padding: 0.375rem 0.75rem;
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
    color: #495057;
    background-color: #fff;
    background-clip: padding-box;
    border: 1px solid #ced4da;
    border-radius: 0.25rem;
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.form-row {
    display: flex;
    flex-wrap: wrap;
    margin-right: -5px;
    margin-left: -5px;
}

.form-row > .col, .form-row > [class*="col-"] {
    padding-right: 5px;
    padding-left: 5px;
}

/* 下拉菜单 */
select.form-control {
    height: calc(1.5em + 0.75rem + 2px);
}

/* 徽章样式 */
.badge {
    display: inline-block;
    padding: 0.25em 0.4em;
    font-size: 75%;
    font-weight: 700;
    line-height: 1;
    text-align: center;
    white-space: nowrap;
    vertical-align: baseline;
    border-radius: 0.25rem;
}

.badge-success {
    color: #fff;
    background-color: #28a745;
}

.badge-warning {
    color: #212529;
    background-color: #ffc107;
}

/* 文本辅助类 */
.text-center {
    text-align: center !important;
}

.text-left {
    text-align: left !important;
}

/* 浮动 */
.clearfix::after {
    display: block;
    content: "";
    clear: both;
}

.float-left {
    float: left !important;
}

.float-right {
    float: right !important;
}

/* 边距 */
.mb-0 { margin-bottom: 0 !important; }
.mb-1 { margin-bottom: 0.25rem !important; }
.mb-2 { margin-bottom: 0.5rem !important; }
.mb-3 { margin-bottom: 1rem !important; }
.mb-4 { margin-bottom: 1.5rem !important; }
.mb-5 { margin-bottom: 3rem !important; }

.mt-0 { margin-top: 0 !important; }
.mt-1 { margin-top: 0.25rem !important; }
.mt-2 { margin-top: 0.5rem !important; }
.mt-3 { margin-top: 1rem !important; }
.mt-4 { margin-top: 1.5rem !important; }
.mt-5 { margin-top: 3rem !important; }

.ml-0 { margin-left: 0 !important; }
.ml-1 { margin-left: 0.25rem !important; }
.ml-2 { margin-left: 0.5rem !important; }
.ml-3 { margin-left: 1rem !important; }
.ml-4 { margin-left: 1.5rem !important; }
.ml-5 { margin-left: 3rem !important; }

.mr-0 { margin-right: 0 !important; }
.mr-1 { margin-right: 0.25rem !important; }
.mr-2 { margin-right: 0.5rem !important; }
.mr-3 { margin-right: 1rem !important; }
.mr-4 { margin-right: 1.5rem !important; }
.mr-5 { margin-right: 3rem !important; }

/* 内边距 */
.p-0 { padding: 0 !important; }
.p-1 { padding: 0.25rem !important; }
.p-2 { padding: 0.5rem !important; }
.p-3 { padding: 1rem !important; }
.p-4 { padding: 1.5rem !important; }
.p-5 { padding: 3rem !important; }

/* 警告框 */
.alert {
    position: relative;
    padding: 0.75rem 1.25rem;
    margin-bottom: 1rem;
    border: 1px solid transparent;
    border-radius: 0.25rem;
}

.alert-info {
    color: #0c5460;
    background-color: #d1ecf1;
    border-color: #bee5eb;
}

/* 响应式工具 */
.d-md-block {
    display: block !important;
}

@media (max-width: 767.98px) {
    .d-md-block {
        display: none !important;
    }
}

/* 弹性布局 */
.d-flex {
    display: flex !important;
}

.justify-content-between {
    justify-content: space-between !important;
}

.align-items-center {
    align-items: center !important;
}

.flex-column {
    flex-direction: column !important;
}

/* 列表组 */
.list-group {
    display: flex;
    flex-direction: column;
    padding-left: 0;
    margin-bottom: 0;
    border-radius: 0.25rem;
}

.list-group-item {
    position: relative;
    display: block;
    padding: 0.75rem 1.25rem;
    background-color: #fff;
    border: 1px solid rgba(0, 0, 0, 0.125);
}

.list-group-item:first-child {
    border-top-left-radius: inherit;
    border-top-right-radius: inherit;
}

.list-group-item:last-child {
    border-bottom-right-radius: inherit;
    border-bottom-left-radius: inherit;
    border-bottom: none;
}

/* 激活状态 */
.active {
    color: #fff !important;
    background-color: #007bff !important;
    border-color: #007bff !important;
}

/* 响应式图片 */
.img-fluid {
    max-width: 100%;
    height: auto;
}

/* 文本颜色 */
.text-muted {
    color: #6c757d !important;
}

.text-danger {
    color: #dc3545 !important;
}

/* 链接样式 */
a {
    color: #007bff;
    text-decoration: none;
    background-color: transparent;
}

a:hover {
    color: #0056b3;
    text-decoration: underline;
}

/* 响应式工具 */
@media print {    
    .d-print-none {
        display: none !important;
    }
}

/* 确保基本功能可用 */
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
    color: #212529;
    background-color: #fff;
}

h1, h2, h3, h4, h5, h6 {
    margin-top: 0;
    margin-bottom: 0.5rem;
    font-weight: 500;
    line-height: 1.2;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
    margin-top: 0;
    margin-bottom: 1rem;
}

/* 移除焦点轮廓 */
.btn:focus, .form-control:focus {
    outline: 0;
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

/* 确保媒体查询正常工作 */
@media (max-width: 575.98px) {
    .table-responsive-sm {
        display: block;
        width: 100%;
        overflow-x: auto;
    }
}

@media (max-width: 767.98px) {
    .table-responsive-md {
        display: block;
        width: 100%;
        overflow-x: auto;
    }
}

@media (max-width: 991.98px) {
    .table-responsive-lg {
        display: block;
        width: 100%;
        overflow-x: auto;
    }
}

@media (max-width: 1199.98px) {
    .table-responsive-xl {
        display: block;
        width: 100%;
        overflow-x: auto;
    }
}