/* 
   ========== 合并优化后的CSS文件 ==========
   包含：base.css + index.css + css.css 的优化合并版本
   专门用于 xuexi.html 页面
*/

/* ========== 基础重置样式 (来自base.css) ========== */
html, body, ul, ol, li, p, h1, h2, h3, h4, h5, h6,
form, fieldset, img, dl, dt, dd, iframe, span {
    margin: 0;
    padding: 0;
    border: 0;
    list-style-type: none;
}

table, td {
    margin: 0;
    padding: 0;
}

b {
    text-decoration: none;
    font-weight: normal;
}

body {
    padding: 0;
    margin: 0;
    zoom: 100%;
    font-size: 16px;
    background-color: #ffffff;
    line-height: 1;
    font-family: 'Microsoft YaHei', 寰蒋闆呴粦, 瀹嬩綋, 榛戜綋, 'Helvetica Neue', Tahoma, Arial, 'Hiragino Sans GB';
}

table {
    width: 100% !important;
    max-width: 100% !important;
    text-align: center;
}

table td {
    word-break: break-all;
    word-wrap: break-word;
    font: 500 14px Arial;
}

ul, dl, dt, dd, ol {
    list-style-type: none;
}

select, input {
    vertical-align: middle;
    padding: 0;
    margin: 0;
    outline: none;
}

textarea {
    resize: none;
    outline: none;
}

input[type='button'],
input[type='submit'],
input[type='file'],
button {
    cursor: pointer;
    -webkit-appearance: none;
}

a {
    color: #333333;
    text-decoration: none;
}

a:hover {
    cursor: pointer;
}

em {
    font-style: normal;
}

i {
    font-style: normal;
}

* html .clear {
    zoom: 1;
}

*+html .clear {
    zoom: 1;
}

* {
    margin: auto;
    padding: auto;
    font-family: 'Microsoft YaHei', 寰蒋闆呴粦, 瀹嬩綋, 榛戜綋, 'Helvetica Neue', Tahoma, Arial, 'Hiragino Sans GB';
}

.Clear {
    clear: both;
}

.container {
    width: 1200px;
    margin: 0 auto;
}

.r {
    float: right;
}

.l {
    float: left;
}

.clearfix:before,
.clearfix:after {
    content: '';
    display: table;
}

.clearfix:after {
    clear: both;
}

.clearfix {
    *zoom: 1;
    /*IE/7/6*/
}

.tong_VisualArea {
    margin-top: 80px;
    background-color: #fff;
    box-sizing: border-box;
    padding: 50px 30px;
    min-height: 300px;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.1);
}

html, body {
    min-width: 1200px;
    max-width: 1920px;
    margin: auto;
}

/* ========== 主页布局样式 (来自index.css，已针对学习页面优化) ========== */
.index_bj {
    min-height: 2000px;
    margin-bottom: 60px;
    background: url(../img/index_bj.png) no-repeat center top;
}

.header a:first-child {
    float: left;
}

.header a img {
    width: 296px;
    height: 60px;
    margin-top: 30px;
}

.header a:last-child {
    display: block;
    width: 130px;
    height: 37px;
    margin-top: 36px;
    font-size: 16px;
    text-align: center;
    line-height: 37px;
    color: #af1d1e;
    background: url(../img/fhsy.png) no-repeat center;
    float: right;
    padding-left: 25px;
    box-sizing: border-box;
}

.toutiao {
    height: 201px;
    margin-top: 578px;
    background: url(../img/toutiao_bj.png) no-repeat center;
}

.toutiao a:first-child {
    width: 65px;
    height: 201px;
    display: block;
    float: left;
}

.toutiao a:nth-child(2) {
    font-size: 38px;
    color: #ffffff;
    display: block;
    height: 38px;
    line-height: 38px;
    font-weight: bold;
    text-align: center;
    width: 1098px;
    float: left;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    margin-left: 20px;
    margin-top: 41px;
}

.toutiao a:nth-child(2):hover {
    color: #ffdd8c;
}

.toutiao span {
    float: left;
    width: 1098px;
    font-size: 18px;
    margin-left: 80px;
    display: block;
    margin-top: 22px;
    color: #ffdd8c;
    line-height: 34px;
    text-indent: 2em;
}

.toutiao span:hover {
    color: #fff;
}

.xxjxs {
    padding-top: 50px;
}

.xxjxs_t {
    height: 158px;
    background: url(../img/xxjxs_t.png) no-repeat center;
}

.xxjxs_t a {
    float: right;
    font-size: 14px;
    display: block;
    color: #c10001;
    margin-top: 50px;
    margin-right: 31px;
}

.xxjxs_c {
    margin-top: 36px;
    height: 583px;
    overflow: hidden;
    position: relative;
    background: url(../img/xxjxs_c_bj.png) no-repeat left center;
}

.xxjxs_c .bd {
    width: 848px;
    height: 549px;
    overflow: hidden;
    position: absolute;
    left: 14px;
    top: 14px;
}

.xxjxs_c .bd ul li .pic {
    width: 100%;
    height: 477px;
}

.xxjxs_c .bd ul li .pic img {
    width: 100%;
    height: 477px;
}

.xxjxs_c .bd ul li .title {
    width: 100%;
    height: 70px;
    float: left;
    border-top: 1px solid #ffc273;
    box-sizing: border-box;
    background-color: #e41a1b;
}

.xxjxs_c .bd ul li .title a {
    display: block;
    padding: 0 30px;
    box-sizing: border-box;
    line-height: 70px;
    font-size: 18px;
    color: #ffffff;
    text-align: center;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.xxjxs_c .hd {
    width: 302px;
    height: 550px;
    margin-top: 5px;
    position: absolute;
    right: 0;
    top: 0;
}

.xxjxs_c .hd ul li {
    width: 302px;
    height: 170px !important;
    border: 10px solid #ffc273;
    box-sizing: border-box;
    margin-bottom: 19px !important;
    cursor: pointer;
}

.xxjxs_c .hd ul li img {
    width: 284px;
    height: 151px;
}

.xxjxs_c .hd ul li.on {
    border: 10px solid #e41a1b;
}

.gd {
    display: block;
    width: 302px;
    position: absolute;
    right: 0;
    bottom: 0;
    font-size: 14px;
    color: #c10001;
    text-align: center;
}

.fldt {
    padding-top: 50px;
    margin: 20px;
}

.fldt_t {
    height: 158px;
    background: url(../img/fldt_t.png) no-repeat center;
}

.fldt_t a {
    float: right;
    font-size: 14px;
    display: block;
    color: #c10001;
    margin-top: 50px;
    margin-right: 31px;
}

.fldt_c {
    padding-top: 35px;
    overflow: hidden;
}

.fldt_c ul li {
    float: left;
}

.fldt_c ul li:nth-child(1),
.fldt_c ul li:nth-child(2),
.fldt_c ul li:nth-child(3),
.fldt_c ul li:nth-child(4),
.fldt_c ul li:nth-child(5),
.fldt_c ul li:nth-child(6) {
    width: 380px;
    height: 243px;
    margin-right: 30px;
    overflow: hidden;
}

.fldt_c ul li:nth-child(3) {
    margin-right: 0 !important;
}

.fldt_c ul li:nth-child(1) a,
.fldt_c ul li:nth-child(2) a,
.fldt_c ul li:nth-child(3) a,
.fldt_c ul li:nth-child(4) a,
.fldt_c ul li:nth-child(5) a,
.fldt_c ul li:nth-child(6) a {
    width: 380px;
    height: 243px;
    display: block;
    position: relative;
    overflow: hidden;
}

.fldt_c ul li a {
    transition: all .3s;
}

.fldt_c ul li a:hover img {
    opacity: .75;
}

.fldt_c ul li:nth-child(1) a img,
.fldt_c ul li:nth-child(2) a img,
.fldt_c ul li:nth-child(3) a img,
.fldt_c ul li:nth-child(4) a img,
.fldt_c ul li:nth-child(5) a img,
.fldt_c ul li:nth-child(6) a img {
    width: 380px;
    height: 214px;
    border: 4px solid #e41a1b;
    box-sizing: border-box;
}

.fldt_c ul li:nth-child(1) a span,
.fldt_c ul li:nth-child(2) a span,
.fldt_c ul li:nth-child(3) a span,
.fldt_c ul li:nth-child(4) a span,
.fldt_c ul li:nth-child(5) a span,
.fldt_c ul li:nth-child(6) a span {
    width: 340px;
    height: 57px;
    display: block;
    position: absolute;
    bottom: 0;
    left: 20px;
    background-color: #fee6b7;
}

.fldt_c ul li:nth-child(1) a span i,
.fldt_c ul li:nth-child(2) a span i,
.fldt_c ul li:nth-child(3) a span i,
.fldt_c ul li:nth-child(4) a span i,
.fldt_c ul li:nth-child(5) a span i,
.fldt_c ul li:nth-child(6) a span i {
    width: 330px;
    height: 47px;
    margin: 5px;
    box-sizing: border-box;
    display: block;
    font-size: 18px;
    padding: 0 10px;
    line-height: 45px;
    color: #c10001;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.fldt_xx {
    margin-top: 35px;
}

.fldt_xx ul li {
    width: 580px;
    height: 114px;
    border-bottom: 1px dashed #e1e1e1;
    box-sizing: border-box;
    float: left;
    margin-top: 40px;
}

.fldt_xx ul li:nth-child(2n) {
    margin-left: 40px;
}

.fldt_xx ul li a {
    width: 580px;
    display: block;
    font-size: 20px;
    color: #af1d1e;
    font-weight: bold;
    height: 22px;
    line-height: 22px;
    float: left;
    background: url(../img/fldt_li.png) no-repeat left center;
    box-sizing: border-box;
    padding-left: 20px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    transition: all .3s;
}

.fldt_xx ul li span {
    display: block;
    font-size: 16px;
    line-height: 32px;
    float: left;
    margin-top: 12px;
    text-indent: 2em;
    color: #999999;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    transition: all .3s;
}

.fldt_xx ul li span:hover {
    color: #c10001;
}

.fldt_xx ul li a:hover {
    color: #333;
}

.footer {
    height: 133px;
    background-color: #c10001;
}

.footer_l {
    float: left;
    margin-left: 206px;
    margin-top: 37px;
}

.footer_l a {
    width: 50px;
    height: 59px;
    display: block;
    background: url(../img/dzjg.png) no-repeat center;
}

.footer_r {
    width: 670px;
    float: left;
    margin-top: 41px;
    margin-left: 80px;
}

.footer_r ul li {
    width: 100%;
    margin-bottom: 14px;
    font-size: 16px;
    float: left;
    color: #fcbbbb;
}

.footer_r ul li span {
    position: relative;
}

.footer_r ul li span a {
    width: 20px;
    height: 20px;
    position: absolute;
    margin-left: 10px;
    top: 1px;
    display: inline-block;
    background: url(../img/pic.png) no-repeat center;
}

.footer_r ul li a {
    font-size: 16px;
    color: #fcbbbb;
}

.footer_r ul li .a2 {
    background: url(../img/gaba.png) no-repeat left center;
    padding-left: 25px;
}

/* ========== 学习页面专属优化样式 (来自css.css) ========== */
/* 注意：这些选择器使用 .xuexi-page 前缀确保只影响学习页面 */

/* 重置专题容器基础样式 */
.xuexi-page .fldt {
    width: 100% !important;
    float: none !important;
    margin: 0 auto !important;
    padding: 0;
    box-sizing: border-box;
}

/* 专题标题样式统一优化 */
.xuexi-page .xxjxs_t,
.xuexi-page .fldt_t {
    height: auto !important;
    padding: 20px;
    background: none !important;
    border-bottom: 1px solid #eee;
    margin-bottom: 15px;
}

.xuexi-page .xxjxs_t h2,
.xuexi-page .fldt_t h3 {
    text-align: left !important;
    color: #c10001 !important;
    font-size: 24px !important;
    padding: 0 !important;
    margin: 0 !important;
    font-weight: 600;
}

/* 字体大小统一为24px，与h2保持一致 - 已删除单独的h3字体大小设置 */

/* 列表容器优化（保留内部内容，仅优化容器） */
.xuexi-page .fldt_xx {
    width: 100%;
    margin: 0 !important;
    padding: 0;
}

.xuexi-page .fldt_xx ul {
    width: 100%;
    padding: 0 10px;
    box-sizing: border-box;
}

.xuexi-page .fldt_xx ul li {
    width: 580px !important;
    float: left !important;
    height: auto !important;
    padding: 15px 0;
    border-bottom: 1px dashed #e1e1e1 !important;
    margin-top: 20px !important;
}

.xuexi-page .fldt_xx ul li:nth-child(2n) {
    margin-left: 40px !important;
}

/* 活动图片容器优化（保留内部内容，仅优化布局） */
.xuexi-page .fldt_c {
    padding: 10px 0 !important;
    width: 100% !important;
    overflow: hidden !important;
}

.xuexi-page .fldt_c ul {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: flex-start;
    padding: 0 10px;
    margin: 0 !important;
    width: 100% !important;
}

.xuexi-page .fldt_c ul li {
    float: none !important;
    margin: 0 !important;
    padding: 0 !important;
    flex: 0 0 calc(25% - 15px);
    max-width: calc(25% - 15px);
    height: auto !important;
    width: auto !important;
}

/* 响应式适配：屏幕小于1200px时调整 */
@media (max-width: 1200px) {
    .xuexi-page .fldt_c ul li {
        flex: 0 0 calc(33.33% - 13px);
        max-width: calc(33.33% - 13px);
    }
}

@media (max-width: 768px) {
    .xuexi-page .fldt_c ul li {
        flex: 0 0 calc(50% - 10px);
        max-width: calc(50% - 10px);
    }
}

@media (max-width: 480px) {
    .xuexi-page .fldt_c ul li {
        flex: 0 0 100%;
        max-width: 100%;
    }
}

/* 交互体验优化 */
.xuexi-page .fldt_c ul li a {
    display: block;
    transition: all 0.3s ease;
}

.xuexi-page .fldt_c ul li a:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.xuexi-page .fldt_xx ul li a {
    transition: color 0.3s ease;
}

.xuexi-page .fldt_xx ul li a:hover {
    color: #c10001 !important;
}

/* 时间文本样式优化 */
.xuexi-page .time {
    display: inline-block;
    margin-top: 8px;
    color: #999 !important;
    font-size: 12px !important;
}