@charset "utf-8";
/* index.css 首页独立样式 */
.index-main{
    background:#fff;
}
/*首屏banner高度900px */
.index-banner{
    width:100%;
    height:900px;
    position:relative;
    overflow:hidden;
}
.banner-slide-wrap{
    width:100%;
    height:100%;
}
.banner-slide-item{
    width:100%;
    height:100%;
    position:absolute;
    left:0;
    top:0;
    opacity:0;
    transition:opacity 0.6s ease;
}
.banner-slide-item.active{
    opacity:1;
}
.banner-bg{
    width:100%;
    height:100%;
    background-size:cover;
    background-position:center;
    position:absolute;
    left:0;
    top:0;
}
.banner-text-box{
    width:100%;
    height:100%;
    display:flex;
    flex-direction:column;
    justify-content:center;
    position:relative;
    z-index:2;
}
/*新增：内部容器控制max-width:1400px，水平居中，左右安全边距 */
.banner-text-inner{
    max-width:1400px;
    width:100%;
    margin:0 auto;
    padding:0 20px;
}
.banner-title{
    font-size:40px;
    font-weight:bold;
    color:#ffffff;
    margin-bottom:55px;
}
.banner-btn{
    display:inline-flex;
    align-items:center;
    gap:12px;
    padding:14px 26px;
    background-color:#0081cc;
    border-radius:999px;
    color:#fff;
    text-decoration:none;
    font-size:16px;
    /*限制按钮最大宽度，不会拉满 */
    max-width:180px;
}
a.banner-btn{ color:#FFFFFF;}
.btn-icon-left{
    width:20px;
    height:20px;
    /*图标自行替换背景 */
	background:url(../img/yuanicon.png) 0 0 no-repeat;
}
.btn-icon-right{
    width:20px;
    height:20px;
    background:url(../img/yuanicon1.png) 0 0 no-repeat;
}
/*底部线条指示器，距离底部30px */
.banner-dots{
    position:absolute;
    bottom:30px;
    left:50%;
    transform:translateX(-50%);
    display:flex;
    gap:12px;
}
.dot-line{
    width:40px;
    height:4px;
    background:rgba(255,255,255,0.3);
    transition:0.25s;
}
.dot-line.active{
    background:#ffffff;
}
/*通用区块间距 */
.index-section{
    margin-top:95px;
}
.section-head{
    text-align:center;
    margin-bottom:20px;
}
.section-title-wrap{
    text-align:center;
}
.sec-big-title{
    font-size:35px;
    font-weight:bold;
    color:#222;
    margin:0;
}
.sec-sub-title-gray{
    font-size:18px;
    color:#b3b3b3;
    margin-top:20px;
}
/*热门产品tab */
.hot-prod-tab-wrap{
    margin-top:70px;
    display:flex;
    justify-content:center;
    gap:32px;
}
.hot-prod-tab{
    font-size:20px;
    font-weight:bold;
    color:#333333;
    text-decoration:none;
    transition:0.25s;
}
.hot-prod-tab:hover,.hot-prod-tab.active{
    color:#0081cc;
}
.line-gray{
    width:100%;
    height:1px;
    background:#cccccc;
    margin-top:30px;
}
/*热门产品横向滚动 ——【修复按钮Mac笔记本超出屏幕】 */
.hot-prod-scroll-outer{
    position:relative;
    margin-top:50px;
    /*给按钮预留向内边距，禁止按钮跑到外面 */
    padding-left:60px;
    padding-right:60px;
}
.prod-scroll-btn{
    width:52px;
    height:52px;
    border-radius:50%;
    background-color:#0081cc;
    color:#fff;
    border:none;
    font-size:20px;
    position:absolute;
    top:50%;
    transform:translateY(-50%);
    z-index:2;
    cursor:pointer;
}
.prod-prev{
    left:0px;
}
.prod-next{
    right:0px;
}
.hot-prod-scroll-wrap{
    overflow:hidden;
    padding-left:0;
    padding-right:0;
}
.hot-prod-scroll{
    display:flex;
    gap:25px;
    transition:transform 0.4s ease;
}
.hot-prod-card{
    flex-shrink:0;
    /* 改用固定像素宽度，解决滚动错位；4张卡片一屏展示 */
    width:320px;
    padding-left:20px;
    padding-right:20px;
    padding-top:45px;
    background-color:#f7f7f7;
    border-radius:12px; /*圆角*/
    box-sizing:border-box; /*重要，padding算进300px宽度内*/
}
.prod-card-title{
    font-size:18px;
    color:#0081cc;
    font-weight:bold;
    margin:0 0 25px;
}
.prod-card-desc{
    font-size:16px;
    color:#b3b3b3;
    margin:0 0 65px;
}
.prod-card-img img{
    width:100%;
    height:auto;
    display:block;
}
.prod-card-img{
    margin-bottom:55px;
}
/*热门解决方案tab */
.sol-tab-wrap{
    margin-top:70px;
    display:flex;
    justify-content:center;
    gap:32px;
}
.sol-tab-item{
    font-size:20px;
    font-weight:bold;
    color:#333333;
    text-decoration:none;
    transition:0.25s;
}
.sol-tab-item:hover,.sol-tab-item.active{
    color:#0081cc;
}
.sol-panel{
    display:none;
}
.sol-panel.active{
    display:block;
}
.sol-panel-inner{
    background-color:#f7f7f7;
    border-radius:12px;
    padding:50px 125px;
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:160px;
    align-items:center;
    margin-top:70px;
}
.sol-panel-left img{
    width:100%;
    height:auto;
    border-radius:8px;
}
.sol-panel-title{
    font-size:38px;
    font-weight:bold;
    margin-bottom:30px;
}
.sol-sub-title{
    font-size:18px;
    margin-bottom:30px;
}
.sol-list{
    list-style:none;
    padding:0;
    margin:0 0 65px;
}
.sol-list li{
    font-size:18px;
    margin-bottom:18px;
}
.sol-btn{
    display:inline-flex;
    align-items:center;
    gap:10px;
    padding:14px 40px;
    background-color:#0081cc;
    border-radius:999px;
    color:#fff;
    text-decoration:none;
    font-size:16px;
}
a.sol-btn{ color:#FFFFFF;}
/*核心优势 满屏背景 */
.core-adv-section{
    margin-top:95px;
}
.core-adv-bg{
    width:100vw;
    margin-left:calc(-50vw + 50%);
    background:url('../img/syhxysbg.jpg') center / cover no-repeat;
    padding-top:65px;
    padding-bottom:120px;
    position:relative;
}
/*背景蒙版 */
.core-adv-bg::before{
    content:"";
    position:absolute;
    left:0;
    top:0;
    width:100%;
    height:100%;
    background:rgba(0,0,0,0.55);
    z-index:1;
}
.core-adv-inner{
    position:relative;
    z-index:2;
    max-width:1400px;
    margin:0 auto;
    padding-left:20px;
    padding-right:20px;
}
.adv-head{
    margin-bottom:40px;
}
.adv-big-title{
    font-size:35px;
    font-weight:bold;
    color:#ffffff;
    margin:0 0 18px;
}
.adv-sub-title{
    font-size:18px;
    color:#ffffff;
}
/* 两栏：左菜单，右卡片【已修复，删除多余ys】 */
.core-adv-two-col{
    display:grid;
    grid-template-columns:350px 1fr;
    gap:80px;
    align-items:start;
}
/*左侧垂直hover菜单 */
.adv-col-left{
    color:#fff;
}
/*右侧卡片模块 */
.adv-col-right{
    color:#fff;
}
.adv-vert-wrap{
    position:relative;
    padding-left:28px;
}
/*竖线：上下暗，中间亮渐变 */
.adv-vert-line{
    position:absolute;
    left:0;
    top:0;
    width:2px;
    height:100%;
    background:linear-gradient(to bottom, rgba(255,255,255,0.12), #ffffff 47%, #ffffff 53%, rgba(255,255,255,0.12));
}
.adv-vert-item{
    position:relative;
    margin-bottom:1px;
    cursor:pointer;
	padding-left:15px;
}
/*圆点：left -52px，宽高52px */
.adv-dot{
    position:absolute;
    left:-52px;
    top:0;
    width:52px;
    height:52px;
    border-radius:50%;
    background-color:transparent;
    display:flex;
    align-items:center;
    justify-content:center;
    color:#fff;
    font-size:20px;
}
/*箭头默认隐藏 */
.adv-dot::after{
    content:"→";
    display:none;
}
/*激活态：圆形背景 + 显示箭头 */
.adv-vert-item.active .adv-dot{
    background-color:#0081cc;
}
.adv-vert-item.active .adv-dot::after{
    display:flex;
}
.adv-vert-text{
    font-size:20px;
    line-height:52px;
}
/*面板：和上方菜单间距固定15px */
.adv-panel{
    display:none;
    margin-top:10px;
    margin-bottom:10px;
	padding-left:15px;
    max-width:440px;
}
.adv-panel.active{
    display:block;
}
.adv-panel p{
    font-size:16px;
    line-height:1.7;
    color:#fff;
    margin:0;
}
.adv-btn{
    display:inline-flex;
    align-items:center;
    gap:10px;
    padding:14px 40px;
    background-color:#0081cc;
    border-radius:999px;
    color:#fff;
    text-decoration:none;
    font-size:16px;
	margin-top:50px;
}
a.adv-btn{ color:#FFFFFF}
/*卡片网格 ——【修复Mac笔记本中等屏幕卡片溢出横向滚动】 */
.adv-card-grid{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:20px;
}
/*卡片：去掉固定px宽高，改用100%自适应格子，大屏保持340px效果，小一点屏幕自动收缩，不再溢出 */
.adv-card{
    width:100%;
    height:525px;
    position:relative;
    border-radius:12px;
    overflow:hidden;
}
.adv-card img{
    width:100%;
    height:100%;
    object-fit:cover;
    display:block;
}
/*蒙版：只占下半部分，从底部到中间，渐变到透明 */
.adv-card-mask{
    position:absolute;
    left:0;
    bottom:0;
    width:100%;
    height:100%;
    background:linear-gradient(to top,#0f87ce,transparent 50%);
    opacity:0.85;
}
.adv-card-text{
    position:absolute;
    left:0;
    bottom:85px;
    padding-left:25px;
    padding-right:25px;
    z-index:2;
}
.adv-card-text p{
    font-size:18px;
    color:#ffffff;
    margin:0;
}
.adv-card-num{
    position:absolute;
    right:20px;
    bottom:10px;
    font-size:50px;
    color:#a6cde3;
    z-index:2;
}
/*居中图片 */
.center-img-section{
    margin-top:140px;
}
.center-img-box{ text-align:center;}
.center-img-box img{
    max-width:100%;
    border-radius:12px;
}
/*----------1、关于我们 了解更多按钮----------*/
.intro-more-btn{
    display:inline-flex;
    align-items:center;
    gap:10px;
    margin-top:35px;
    padding:14px 36px;
    background-color:#0081cc;
    border-radius:999px;
    color:#ffffff;
    text-decoration:none;
    font-size:16px;
}
a.intro-more-btn{color:#fff;}
.intro-btn-icon{
    width:20px;
    height:20px;
    background:#fff;
	background:url(../img/yuanicon.png) 0 0 no-repeat;
}
/*----------2、统计数字：㎡ 和 + 字号缩小16px----------*/
.count-num{
    font-size:36px;
    font-weight:bold;
    color:#0081cc;
    margin-bottom:12px;
}
.count-num small{
    font-size:16px;
    font-weight:normal;
}
/*资讯中心板块，背景#f7f7f7 */
.news-section{
    margin-top:50px;
}
.news-bg{
    width:100vw;
    margin-left:calc(-50vw + 50%);
    background-color:#f7f7f7;
    padding-top:95px;
    padding-bottom:95px;
}
.news-inner-1400{
    max-width:1400px;
    margin:0 auto;
    padding-left:20px;
    padding-right:20px;
}
.news-head{
    text-align:center;
    margin-bottom:75px;
}
.news-big-title{
    font-size:35px;
    font-weight:bold;
}
.news-tab-wrap{
    display:flex;
    justify-content:center;
    gap:24px;
    margin-bottom:50px;
}
.news-tab-item{
    padding:10px 26px;
    background-color:#ffffff;
    border-radius:999px;
    text-decoration:none;
    color:#222;
    font-size:18px;
    transition:0.25s;
}
.news-tab-item:hover,.news-tab-item.active{
    background-color:#0081cc;
    color:#ffffff;
}
.news-card-grid{
    display:grid;
    grid-template-columns:1.8fr 1fr 1fr;
    gap:20px;
}
.news-card{
    border-radius:12px;
    overflow:hidden;
    background:#fff;
}
.news-card-img img{
    width:100%;
    height:auto;
    display:block;
}
.news-card-imgleft img{ height:400px !important; }
.big-news-card .big-card-text{
    position:relative;
    padding-bottom:30px;
    padding-left:30px;
}
.big-news-card h4{
    font-size:18px;
    font-weight:bold;
    color:#fff;
}
.news-card-text{
    padding-left:20px;
    padding-right:20px;
    padding-top:30px;
}
.news-card-text h4{
    font-size:18px;
    font-weight:bold;
    margin-bottom:35px;
}
.news-card-text p{
    font-size:16px;
    color:#8c8c8c;
    margin-bottom:30px;
}
.news-more{
    display:block;
    text-align:right;
    color:#222;
    text-decoration:none;
}
/*----------3、资讯大卡片，文字悬浮图片上层，距离底部25px----------*/
.big-news-card{
    position:relative;
}
.big-news-card .big-card-text{
    position:absolute;
    left:0;
    bottom:25px; /*距离底部25px */
    padding:0 30px;
    z-index:2;
}
.big-news-card .big-card-text h4{
    font-size:18px;
    font-weight:bold;
    color:#fff;
    margin:0;
}
.news-card-img{
    width:100%;
}
.news-card-img img{
    width:100%;
    height:auto;
    display:block;
}
/* 复用about.css的两栏与统计样式，只做适配 */
.intro-wrap{
    display:flex;
    gap:100px;
    align-items:flex-start;
}
.intro-left{
    flex:1;
    padding-top:50px;
}
.intro-main-title{
    font-size:40px;
    font-weight:bold;
    margin-bottom:20px;
    color:#222;
}
.intro-sub-title{
    font-size:20px;
    color:#666666;
    margin-bottom:80px;
}
.intro-high-title{
    font-size:40px;
    font-weight:bold;
    color:#0081cc;
    margin-bottom:55px;
}
.intro-desc p{
    font-size:18px;
    color:#666666;
    line-height:1.8;
}
.intro-desc p strong{
    color:#111;
}
.intro-right{
    width:590px;
    flex-shrink:0;
    margin-top:140px;
}
.intro-right img{
    width:100%;
    border-radius:12px;
    object-fit:cover;
    display:block;
}
.count-wrap{
    display:grid;
    grid-template-columns:repeat(5,1fr);
    gap:20px;
    text-align:left;
}
.count-item{
    display:flex;
    align-items:center;
    background:#fff;
    border-radius:12px;
    padding:35px 20px;
}
.count-line{
    width:3px;
    height:60px;
    background-color:#e4e4e4;
    flex-shrink:0;
}
.count-content{
    margin-left:25px;
}
.count-num{
    font-size:36px;
    font-weight:bold;
    color:#0081cc;
    margin-bottom:12px;
}
.count-text{
    font-size:16px;
    color:#444;
}
/*联系表单模块 ——对齐case‑list.css */
.contact-block {
    width:1400px;
    margin:70px auto 0;
    background:#f8f8f8;
    border-radius:12px;
    padding:60px 40px;
}
.contact-head {
    text-align:center;
}
.contact-block h2 {
    font-size:28px;
    font-weight:bold;
    color:#222;
}
.contact-desc {
    margin-top:12px;
    font-size:14px;
    color:#999;
}
.contact-form {
    margin-top:40px;
}
.form-row-four {
    display:grid;
    grid-template-columns:repeat(4, 1fr);
    gap:24px;
    margin-bottom:24px;
}
.form-row-full {
    margin-bottom:30px;
}
.form-label {
    display:block;
    font-size:14px;
    color:#222;
    margin-bottom:8px;
    text-align:left;
}
.form-item input,
.form-item select {
    width:100%;
    height:46px;
    border:1px solid #dde3ec;
    border-radius:6px;
    padding:0 14px;
    font-size:14px;
    background:#fff;
}
.form-textarea {
    width:100%;
    min-height:140px;
    border:1px solid #dde3ec;
    border-radius:6px;
    padding:14px;
    resize:none;
    font-size:14px;
    background:#fff;
}
.form-btn-wrap {
    text-align:center;
}
.btn-submit {
    padding:14px 48px;
    background:#000000;
    color:#fff;
    border:none;
    border-radius:99px;
    cursor:pointer;
    font-size:16px;
}
.bottom-gap {
    height:80px;
}

/*移动端适配，修复首页手机端不合理问题 */
@media(max-width:1440px){
    .hot-prod-card{
        width:280px;
    }
    /*表单1440下宽度+四栏变两栏（对齐case‑list.css） */
    .contact-block{
        width:96%;
    }
    .form-row-four {
        grid-template-columns:repeat(2, 1fr);
    }
}
@media(max-width:1200px){
    .intro-wrap{
        flex-direction:column;
    }
    .intro-right{
        width:100%;
        margin-top:40px;
    }
    .count-wrap{
        grid-template-columns:repeat(3,1fr);
    }
    .sol-panel-inner{
        grid-template-columns:1fr;
        gap:40px;
        padding:30px 20px;
    }
    .core-adv-two-col{
        grid-template-columns:1fr;
        gap:60px;
    }
    .adv-card-grid{
        grid-template-columns:repeat(2,1fr);
    }
    .news-card-grid{
        grid-template-columns:1fr 1fr;
    }
}
@media(max-width:768px){
    .index-banner{
        height:600px;
    }
    .banner-title{
        font-size:30px;
    }
    .sec-big-title{
        font-size:28px;
    }
    .hot-prod-card{
        width:260px;
    }
    /*修复：产品滚动按钮小屏被切，向内缩进 */
    .prod-prev{
        left:10px;
    }
    .prod-next{
        right:10px;
    }
    .count-wrap{
        grid-template-columns:repeat(2,1fr);
    }
    .adv-card-grid{
        grid-template-columns:1fr;
    }
    .news-card-grid{
        grid-template-columns:1fr;
    }
    /*表单768px下改为单列（对齐case‑list.css） */
    .form-row-four{
        grid-template-columns:1fr;
    }
    .contact-block{
        padding:30px 16px;
    }
}
@media(max-width:480px){
    .hot-prod-card{
        width:calc(100% - 40px);
    }
}