/*
!* Bootstrap 5.3 兼容性样式 - 修复升级后的布局问题 *!

!* 1. 修复网格系统间距问题 *!
.row {
    margin-left: -15px;
    margin-right: -15px;
}

.row > * {
    padding-left: 15px;
    padding-right: 15px;
}

!* 2. 修复 container 最大宽度 *!
@media (min-width: 576px) {
    .container, .container-sm {
        max-width: 540px;
    }
}

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

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

@media (min-width: 1200px) {
    .container, .container-xl, .container-lg, .container-md, .container-sm {
        max-width: 1140px;
    }
}

!* 3. 修复 col-md-* 等列类的浮动和宽度 *!
.col-md-1, .col-md-2, .col-md-3, .col-md-4, .col-md-5, .col-md-6,
.col-md-7, .col-md-8, .col-md-9, .col-md-10, .col-md-11, .col-md-12,
.col-sm-1, .col-sm-2, .col-sm-3, .col-sm-4, .col-sm-5, .col-sm-6,
.col-sm-7, .col-sm-8, .col-sm-9, .col-sm-10, .col-sm-11, .col-sm-12,
.col-lg-1, .col-lg-2, .col-lg-3, .col-lg-4, .col-lg-5, .col-lg-6,
.col-lg-7, .col-lg-8, .col-lg-9, .col-lg-10, .col-lg-11, .col-lg-12 {
    position: relative;
    min-height: 1px;
    padding-right: 15px;
    padding-left: 15px;
    float: left;
}

.col-md-1 { width: 8.333333%; }
.col-md-2 { width: 16.666667%; }
.col-md-3 { width: 25%; }
.col-md-4 { width: 33.333333%; }
.col-md-5 { width: 41.666667%; }
.col-md-6 { width: 50%; }
.col-md-7 { width: 58.333333%; }
.col-md-8 { width: 66.666667%; }
.col-md-9 { width: 75%; }
.col-md-10 { width: 83.333333%; }
.col-md-11 { width: 91.666667%; }
.col-md-12 { width: 100%; }

.col-sm-1 { width: 8.333333%; }
.col-sm-2 { width: 16.666667%; }
.col-sm-3 { width: 25%; }
.col-sm-4 { width: 33.333333%; }
.col-sm-5 { width: 41.666667%; }
.col-sm-6 { width: 50%; }
.col-sm-7 { width: 58.333333%; }
.col-sm-8 { width: 66.666667%; }
.col-sm-9 { width: 75%; }
.col-sm-10 { width: 83.333333%; }
.col-sm-11 { width: 91.666667%; }
.col-sm-12 { width: 100%; }

.col-lg-1 { width: 8.333333%; }
.col-lg-2 { width: 16.666667%; }
.col-lg-3 { width: 25%; }
.col-lg-4 { width: 33.333333%; }
.col-lg-5 { width: 41.666667%; }
.col-lg-6 { width: 50%; }
.col-lg-7 { width: 58.333333%; }
.col-lg-8 { width: 66.666667%; }
.col-lg-9 { width: 75%; }
.col-lg-10 { width: 83.333333%; }
.col-lg-11 { width: 91.666667%; }
.col-lg-12 { width: 100%; }

!* 4. 清除浮动 *!
.clearfix::after {
    content: "";
    display: table;
    clear: both;
}

!* 5. 修复表单控件样式 *!
.form-control {
    display: block;
    width: 100%;
    height: 34px;
    padding: 6px 12px;
    font-size: 14px;
    line-height: 1.428571;
    color: #555;
    background-color: #fff;
    background-image: none;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075);
    transition: border-color ease-in-out 0.15s, box-shadow ease-in-out 0.15s;
}

.form-control:focus {
    border-color: #66afe9;
    outline: 0;
    box-shadow: inset 0 1px 1px rgba(0,0,0,.075), 0 0 8px rgba(102, 175, 233, 0.6);
}

!* 6. 修复按钮样式 *!
.btn {
    display: inline-block;
    padding: 6px 12px;
    margin-bottom: 0;
    font-size: 14px;
    font-weight: normal;
    line-height: 1.428571;
    text-align: center;
    white-space: nowrap;
    vertical-align: middle;
    cursor: pointer;
    background-image: none;
    border: 1px solid transparent;
    border-radius: 4px;
}

.btn-primary {
    color: #fff;
    background-color: #337ab7;
    border-color: #2e6da4;
}

.btn-primary:hover,
.btn-primary:focus,
.btn-primary:active {
    background-color: #286090;
    border-color: #204d74;
}

!* 7. 修复导航栏 *!
.navbar {
    position: relative;
    min-height: 50px;
    margin-bottom: 20px;
    border: 1px solid transparent;
}

.navbar-default {
    background-color: #f8f8f8;
    border-color: #e7e7e7;
}

.navbar-brand {
    float: left;
    height: 50px;
    padding: 15px 15px;
    font-size: 18px;
    line-height: 20px;
}

!* 8. 修复下拉菜单 *!
.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    z-index: 1000;
    display: none;
    float: left;
    min-width: 160px;
    padding: 5px 0;
    margin: 2px 0 0;
    font-size: 14px;
    text-align: left;
    list-style: none;
    background-color: #fff;
    background-clip: padding-box;
    border: 1px solid #ccc;
    border: 1px solid rgba(0, 0, 0, 0.15);
    border-radius: 4px;
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.175);
}

.dropdown.open > .dropdown-menu {
    display: block;
}

!* 9. 修复表格样式 *!
.table {
    width: 100%;
    max-width: 100%;
    margin-bottom: 20px;
}

.table > thead > tr > th,
.table > tbody > tr > th,
.table > tfoot > tr > th,
.table > thead > tr > td,
.table > tbody > tr > td,
.table > tfoot > tr > td {
    padding: 8px;
    line-height: 1.428571;
    vertical-align: top;
    border-top: 1px solid #ddd;
}

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

!* 10. 修复媒体查询断点 *!
@media (max-width: 767px) {
    .hidden-xs {
        display: none !important;
    }
}

@media (min-width: 768px) and (max-width: 991px) {
    .hidden-sm {
        display: none !important;
    }
}

@media (min-width: 992px) and (max-width: 1199px) {
    .hidden-md {
        display: none !important;
    }
}

@media (min-width: 1200px) {
    .hidden-lg {
        display: none !important;
    }
}

!* 11. 文本对齐工具类 *!
.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

.text-center {
    text-align: center;
}

!* 12. 边距工具类 *!
.mt-20 {
    margin-top: 20px;
}

.mb-20 {
    margin-bottom: 20px;
}

.ml-20 {
    margin-left: 20px;
}

.mr-20 {
    margin-right: 20px;
}

!* 13. 内边距工具类 *!
.pt-20 {
    padding-top: 20px;
}

.pb-20 {
    padding-bottom: 20px;
}

.pl-20 {
    padding-left: 20px;
}

.pr-20 {
    padding-right: 20px;
}

!* 14. 响应式图片 *!
.img-responsive {
    display: block;
    max-width: 100%;
    height: auto;
}

!* 15. 中心块 *!
.center-block {
    display: block;
    margin-left: auto;
    margin-right: auto;
}
*/

// ... existing code ...

    /* 31. Bootstrap 3 offset 兼容性修复 */
.col-md-offset-1 {
    margin-left: 8.333333%;
}

.col-md-offset-2 {
    margin-left: 2.666667%;
}

.col-md-offset-3 {
    margin-left: 25%;
}

.col-md-offset-4 {
    margin-left: 33.333333%;
}

.col-md-offset-5 {
    margin-left: 41.666667%;
}

.col-md-offset-6 {
    margin-left: 50%;
}

.col-md-offset-7 {
    margin-left: 58.333333%;
}

.col-md-offset-8 {
    margin-left: 66.666667%;
}

.col-md-offset-9 {
    margin-left: 72%;
}

.col-md-offset-10 {
    margin-left: 83.333333%;
}

.col-md-offset-11 {
    margin-left: 91.666667%;
}
.container {
    margin-right: auto;
    margin-left: auto;
    padding-left: 15px;
    padding-right: 15px;
}
/* 32. Text align 工具类 */
.text-left {
    text-align: left !important;
}

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

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

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

/* 33. Center block 工具类 */
.center-block {
    display: block;
    margin-left: auto;
    margin-right: auto;
}

.mx-auto {
    margin-left: auto;
    margin-right: auto;
}

/* 34. Pull left/right 工具类 */
.pull-left {
    float: left !important;
}

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

/* 35. Hidden 工具类 */
.hidden {
    display: none !important;
}

.invisible {
    visibility: hidden !important;
}

/* 36. Clearfix 工具类 */
.clearfix::before,
.clearfix::after {
    content: " ";
    display: table;
}

.clearfix::after {
    clear: both;
}

/* 37. Image responsive */
.img-responsive {
    max-width: 100%;
    height: auto;
    display: block;
}

.img-rounded {
    border-radius: 6px;
}

.img-circle {
    border-radius: 50%;
}

.img-thumbnail {
    display: inline-block;
    max-width: 100%;
    height: auto;
    padding: 4px;
    line-height: 1.428571;
    background-color: #fff;
    border: 1px solid #ddd;
    border-radius: 4px;
    transition: all 0.2s ease-in-out;
}

/* 38. Well 样式 */
.well {
    min-height: 20px;
    padding: 19px;
    margin-bottom: 20px;
    background-color: #f5f5f5;
    border: 1px solid #e3e3e3;
    border-radius: 4px;
    box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.05);
}

.well-sm {
    padding: 9px;
    border-radius: 3px;
}

.well-lg {
    padding: 24px;
    border-radius: 6px;
}

/* 39. Alert 样式 */
.alert {
    padding: 15px;
    margin-bottom: 20px;
    border: 1px solid transparent;
    border-radius: 4px;
}

.alert-success {
    color: #3c763d;
    background-color: #dff0d8;
    border-color: #d6e9c6;
}

.alert-info {
    color: #31708f;
    background-color: #d9edf7;
    border-color: #bce8f1;
}

.alert-warning {
    color: #8a6d3b;
    background-color: #fcf8e3;
    border-color: #faebcc;
}

.alert-danger {
    color: #a94442;
    background-color: #f2dede;
    border-color: #ebccd1;
}

/* 40. Panel 样式 */
.panel {
    margin-bottom: 20px;
    background-color: #fff;
    border: 1px solid transparent;
    border-radius: 4px;
    box-shadow: 0 1px 1px rgba(0, 0, 0, 0.05);
}

.panel-default {
    border-color: #ddd;
}

.panel-heading {
    padding: 10px 15px;
    border-bottom: 1px solid transparent;
    border-top-left-radius: 3px;
    border-top-right-radius: 3px;
}

.panel-body {
    padding: 15px;
}

.panel-footer {
    padding: 10px 15px;
    background-color: #f5f5f5;
    border-top: 1px solid #ddd;
    border-bottom-right-radius: 3px;
    border-bottom-left-radius: 3px;
}

/* 41. Label 样式 */
.label {
    display: inline;
    padding: .2em .6em .3em;
    font-size: 75%;
    font-weight: bold;
    line-height: 1;
    color: #fff;
    text-align: center;
    white-space: nowrap;
    vertical-align: baseline;
    border-radius: .25em;
}

.label-default {
    background-color: #777;
}

.label-primary {
    background-color: #337ab7;
}

.label-success {
    background-color: #5cb85c;
}

.label-info {
    background-color: #5bc0de;
}

.label-warning {
    background-color: #f0ad4e;
}

.label-danger {
    background-color: #d9534f;
}

/* 42. Badge 样式 */
.badge {
    display: inline-block;
    min-width: 10px;
    padding: 3px 7px;
    font-size: 12px;
    font-weight: bold;
    line-height: 1;
    color: #fff;
    text-align: center;
    white-space: nowrap;
    vertical-align: middle;
    background-color: #777;
    border-radius: 10px;
}

/* 43. Breadcrumb 样式 */
.breadcrumb {
    padding: 8px 15px;
    margin-bottom: 20px;
    list-style: none;
    background-color: #f5f5f5;
    border-radius: 4px;
}

.breadcrumb > li + li::before {
    padding: 0 5px;
    color: #ccc;
    content: "/\00a0";
}

.breadcrumb > .active {
    color: #777;
}

/* 44. Pagination 样式 */
.pagination {
    display: inline-block;
    padding-left: 0;
    margin: 20px 0;
    border-radius: 4px;
}

.pagination > li > a,
.pagination > li > span {
    position: relative;
    float: left;
    padding: 6px 12px;
    margin-left: -1px;
    line-height: 1.428571;
    color: #337ab7;
    text-decoration: none;
    background-color: #fff;
    border: 1px solid #ddd;
}

.pagination > li:first-child > a,
.pagination > li:first-child > span {
    margin-left: 0;
    border-top-left-radius: 4px;
    border-bottom-left-radius: 4px;
}

.pagination > li:last-child > a,
.pagination > li:last-child > span {
    border-top-right-radius: 4px;
    border-bottom-right-radius: 4px;
}

.pagination > li > a:hover,
.pagination > li > span:hover {
    z-index: 2;
    color: #23527c;
    background-color: #eee;
    border-color: #ddd;
}

.pagination > .active > a,
.pagination > .active > span {
    z-index: 3;
    color: #fff;
    cursor: default;
    background-color: #337ab7;
    border-color: #337ab7;
}

/* 45. Pager 样式 */
.pager {
    padding-left: 0;
    margin: 20px 0;
    text-align: center;
    list-style: none;
}

.pager li > a,
.pager li > span {
    display: inline-block;
    padding: 5px 14px;
    background-color: #fff;
    border: 1px solid #ddd;
    border-radius: 15px;
}

.pager li > a:hover,
.pager li > a:focus {
    text-decoration: none;
    background-color: #eee;
}

.pager .next > a,
.pager .next > span {
    float: right;
}

.pager .previous > a,
.pager .previous > span {
    float: left;
}

/* 46. Thumbnail 样式 */
.thumbnail {
    display: block;
    padding: 4px;
    margin-bottom: 20px;
    line-height: 1.428571;
    background-color: #fff;
    border: 1px solid #ddd;
    border-radius: 4px;
    transition: border 0.2s ease-in-out;
}

.thumbnail > img {
    display: block;
    max-width: 100%;
    height: auto;
    margin-right: auto;
    margin-left: auto;
}

.thumbnail .caption {
    padding: 9px;
    color: #333;
}

/* 47. Progress bar 样式 */
.progress {
    height: 20px;
    margin-bottom: 20px;
    overflow: hidden;
    background-color: #f5f5f5;
    border-radius: 4px;
    box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.1);
}

.progress-bar {
    float: left;
    width: 0%;
    height: 100%;
    font-size: 12px;
    line-height: 20px;
    color: #fff;
    text-align: center;
    background-color: #337ab7;
    box-shadow: inset 0 -1px 0 rgba(0, 0, 0, 0.15);
    transition: width 0.6s ease;
}

/* 48. Media object 样式 */
.media {
    margin-top: 15px;
}

.media::after {
    content: "";
    display: table;
    clear: both;
}

.media-body {
    width: 10000px;
}

.media-left,
.media-right,
.media-body {
    display: table-cell;
    vertical-align: top;
}

.media-left {
    padding-right: 10px;
}

.media-right {
    padding-left: 10px;
}

.media-heading {
    margin-top: 0;
    margin-bottom: 5px;
}

/* 49. List group 样式 */
.list-group {
    padding-left: 0;
    margin-bottom: 20px;
}

.list-group-item {
    position: relative;
    display: block;
    padding: 10px 15px;
    margin-bottom: -1px;
    background-color: #fff;
    border: 1px solid #ddd;
}

.list-group-item:first-child {
    border-top-left-radius: 4px;
    border-top-right-radius: 4px;
}

.list-group-item:last-child {
    margin-bottom: 0;
    border-bottom-right-radius: 4px;
    border-bottom-left-radius: 4px;
}

/* 50. Close button 样式 */
.close {
    float: right;
    font-size: 21px;
    font-weight: bold;
    line-height: 1;
    color: #000;
    text-shadow: 0 1px 0 #fff;
    filter: alpha(opacity=20);
    opacity: .2;
}

.close:hover,
.close:focus {
    color: #000;
    text-decoration: none;
    cursor: pointer;
    filter: alpha(opacity=50);
    opacity: .5;
}