/* ========== 开课时间 kcpx.css ========== */

/* 头部黑色背景 */
.top_bg {
    position: relative;
    height: 135px;
    width: 100%;
    background: rgba(0, 0, 0, 1);
    z-index: 11;
}

.top_bg:before {
    content: "";
    width: 100%;
    height: 1px;
    background: rgba(255, 255, 255, 0.3);
    position: absolute;
    bottom: 0;
    left: 0;
}

/* 覆盖layout的padding-top */
#app{padding-top:0!important}

/* ===== 面包屑 ===== */
.plc{width:1200px;margin:0 auto;height:40px;line-height:40px;font-size:14px;color:#808080;display: none;}
.p102-curmbs-1{height:40px;line-height:40px;font-size:14px;color:#808080}
.p102-curmbs-1 b{font-weight:normal;padding-left:18px;background:url(../images/p102-curmbs-icon1.png) no-repeat left center}
.p102-curmbs-1 i{font-style:normal}
.p102-curmbs-1 span{padding:0 6px}
.p102-curmbs-1 a{color:#808080}
.p102-curmbs-1 a:hover{color:#000}

/* ===== 分类导航 ===== */
.ztkc-category-nav{background:#fafafa;padding:24px 0;border-bottom:1px solid #f0f0f0}
.ztkc-category-inner{width:1200px;margin:0 auto;display:flex;align-items:center;gap:30px}
.ztkc-category-list{display:flex;gap:12px;flex-wrap:wrap}
.ztkc-category-item{display:inline-block;padding:10px 28px;font-size:14px;color:#666;background:#fff;border:1px solid #e5e5e5;border-radius:30px;text-decoration:none;transition:all .3s}
.ztkc-category-item:hover{background:#000;color:#fff;border-color:#000}
.ztkc-category-item.active{background:#000;color:#fff;border-color:#000}

/* ===== 文章列表 ===== */
.kcpx-article-list{padding:60px 0 0}
.kcpx-article-list dl{float:left;width:570px;padding:25px 0;border-bottom:4px solid #f0f0f0;position:relative;margin:0 60px 60px 0}
.kcpx-article-list dl:nth-child(3n-1){margin-right:0}
.kcpx-article-list dt{position:relative;width:265px;height:190px;overflow:hidden}
.kcpx-article-list dt img{width:100%;height:100%;object-fit:cover;display:block}
.kcpx-article-list dd{position:absolute;width:260px;right:20px;top:20px;bottom:25px}
.kcpx-article-list dd h4{font-weight:normal;padding-top:20px;margin-bottom:5px}
.kcpx-article-list dd h4 a{display:block;line-height:30px;font-size:18px;color:#1a1a1a;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.kcpx-article-list dd span{display:block;height:26px;font:14px/26px Arial;color:#999}
.kcpx-article-list .kcpx-article-desc{position:absolute;width:100%;font-size:14px;line-height:24px;color:#737373;text-align:justify;right:0;bottom:20px;display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:2;overflow:hidden;text-overflow:ellipsis}
.kcpx-article-list dl:hover{background-color:#f2f2f2;border-color:#000}

/* ===== 两列布局修正（仅桌面端） =====
   原因：reset.css 给 .blk-main 设了 padding:0 15px + box-sizing:border-box，
   使 1200px 容器内容区实际只有 1170px；而两个卡片需要 570+60+570=1200px，
   差 30px 放不下 → 第二个卡片被挤到下一行，列表退化成单列。
   处理：用负 margin 抵消那 15px（与 news.css 的 .p101-article-1-list 同一手法），
   并把卡片宽度改为自适应，留 4px 余量避免亚像素舍入导致换行。
   移动端（≤1024px）不受影响，仍走下方媒体查询的单列规则。 */
@media screen and (min-width: 1025px) {
    .kcpx-article-list {
        margin: 0 -15px;
    }
    .kcpx-article-list dl {
        width: calc(50% - 32px);
    }
}

/* ===== 分页 ===== */
.kcpx-pagination{padding:20px 0 60px;text-align:center}
.kcpx-pagination-main{display:flex;justify-content:center;align-items:center;gap:8px}
.kcpx-pagination-main a{display:inline-block;min-width:40px;height:40px;line-height:40px;text-align:center;font-size:14px;color:#666;background:#fff;border:1px solid #e5e5e5;border-radius:8px;text-decoration:none;transition:all .3s;padding:0 12px}
.kcpx-pagination-main a:hover{background:#1a1a1a;color:#fff;border-color:#1a1a1a}
.kcpx-pagination-main .page_curr{background:#1a1a1a;color:#fff;border-color:#1a1a1a}

/* ===== 通用 ===== */
.blk-main{width:1200px;margin:0 auto}
.clearafter:after{content:"";display:table;clear:both}
.clear{clear:both}

/* ========== 移动端适配 ========== */
/* 大屏降级 (max-width: 1500px) */
@media screen and (max-width: 1500px) {
    .plc,
    .blk-main {
        width: 1200px;
    }
    .ztkc-category-inner {
        width: 1200px;
    }
}

/* 平板 (max-width: 1024px) */
@media screen and (max-width: 1024px) {
    .plc,
    .blk-main {
        width: 100% !important;
        padding: 0 20px;
        box-sizing: border-box;
    }
    .ztkc-category-inner {
        width: 100%;
        padding: 0 20px;
        box-sizing: border-box;
    }
    .kcpx-article-list {
        padding: 30px 20px 0;
        box-sizing: border-box;
    }
    .kcpx-article-list dl {
        float: none;
        width: 100% !important;
        margin: 0 0 30px !important;
        padding: 20px 0;
    }
    .kcpx-article-list dl:nth-child(3n-1) {
        margin-right: 0;
    }
    .kcpx-article-list dt {
        width: 100% !important;
        height: auto;
        aspect-ratio: 265/190;
    }
    .kcpx-article-list dd {
        position: static;
        width: 100% !important;
        padding-top: 15px;
    }
}

/* 手机 (max-width: 768px) */
@media screen and (max-width: 768px) {
    /* ---- 顶部头部 ---- */
    .top_bg {
        position: relative;
        height: auto;
        min-height: 60px;
    }
    .top_bg:before {
        display: none;
    }
    #app {
        padding-top: 0 !important;
    }

    /* ---- 分类导航：移动端两列网格 ---- */
    .ztkc-category-nav {
        padding: 12px 0 !important;
        border-bottom: 1px solid #f0f0f0 !important;
    }
    .ztkc-category-inner {
        width: 100% !important;
        padding: 0 15px !important;
        box-sizing: border-box !important;
        display: block !important;
        gap: 0 !important;
    }
    .ztkc-category-list {
        display: flex !important;
        flex-wrap: wrap !important;
        gap: 10px !important;
    }
    .ztkc-category-item {
        display: block !important;
        flex: 0 1 48% !important;
        min-width: 0 !important;
        max-width: 48% !important;
        box-sizing: border-box !important;
        height: 36px !important;
        line-height: 34px !important;
        font-size: 15px !important;
        padding: 0 8px !important;
        text-align: center !important;
        white-space: nowrap !important;
        overflow: hidden !important;
        text-overflow: ellipsis !important;
        background: #fff !important;
        color: #666 !important;
        border: 1px solid #e5e5e5 !important;
        border-radius: 30px !important;
        text-decoration: none !important;
    }
    .ztkc-category-item.active {
        background: #000 !important;
        color: #fff !important;
        border-color: #000 !important;
    }

    /* ---- 固定宽容器改 100% ---- */
    .plc,
    .blk-main {
        width: 100% !important;
        padding: 0 15px;
        box-sizing: border-box;
    }

    /* ---- 课程文章列表：单列，改流式布局 ---- */
    .kcpx-article-list {
        padding: 30px 15px 0;
        box-sizing: border-box;
    }
    .kcpx-article-list dl {
        float: none;
        width: 100% !important;
        margin: 0 0 25px !important;
        padding: 15px 0;
    }
    .kcpx-article-list dl:nth-child(3n-1) {
        margin-right: 0;
    }
    .kcpx-article-list dt {
        width: 100% !important;
        height: auto;
        aspect-ratio: 265/190;
        margin-bottom: 12px;
    }
    .kcpx-article-list dt img {
        width: 100%;
        height: 100%;
    }
    .kcpx-article-list dd {
        position: static;
        width: 100% !important;
        right: auto;
        top: auto;
        bottom: auto;
        padding-top: 0;
    }
    .kcpx-article-list dd h4 {
        padding-top: 10px;
    }
    .kcpx-article-list dd h4 a {
        font-size: 16px;
        line-height: 26px;
    }
    .kcpx-article-list .kcpx-article-desc {
        position: static;
        width: 100% !important;
        bottom: auto;
        margin-top: 8px;
        line-height: 22px;
    }

    /* ---- 分页 ---- */
    .kcpx-pagination {
        padding: 10px 0 40px;
    }
    .kcpx-pagination-main {
        flex-wrap: wrap;
        gap: 6px;
    }
    .kcpx-pagination-main a {
        min-width: 34px;
        height: 34px;
        line-height: 34px;
        padding: 0 10px;
    }

    /* ---- 富文本防溢出 ---- */
    .endit-content img,
    .endit-content table,
    .endit-content video,
    .endit-content iframe {
        max-width: 100% !important;
        height: auto;
    }
}

/* 小屏 (max-width: 480px) */
@media screen and (max-width: 480px) {
    .kcpx-article-list {
        padding: 20px 12px 0;
    }
    .kcpx-article-list dd h4 a {
        font-size: 15px;
    }
}