<style>
*{
    box-sizing:border-box;
    margin:0;
    padding:0;
    font-family:system-ui, sans-serif;
}
img{
    max-width:100%;
    display:block;
}
html{
    scroll-behavior: smooth;
}
/*===== Banner首屏 =====*/
.banner-hero{
    width:100%;
    min-height:600px;
    background: url("{sdcms[web_dir]}/theme/20170102/MerchantCooperation/tu/shotu.png") no-repeat center center;
    background-size:cover;
    position:relative;
    display:flex;
    flex-direction:column;
    align-items:center;
    justify-content:center;
    color:#fff;
    text-align:center;
    padding:40px 20px;
}
.banner-hero::before{
    content:"";
    position:absolute;
    left:0;top:0;
    width:100%;height:100%;
    background:rgba(8,22,60,0.65);
    z-index:1;
}
.banner-hero > *{
    position:relative;
    z-index:2;
}
.banner-title{
    font-size:58px;
    line-height:1.4;
    font-weight:bold;
    margin:0 0 12px;
}
.banner-sub{
    font-size:26px;
    margin:0 0 40px;
    opacity:0.95;
}
.banner-btn{
    display:inline-block;
    padding:18px 60px;
    background:#ffffff;
    color:#ff6600;
    font-size:24px;
    border-radius:999px;
    text-decoration:none;
    font-weight:500;
    transition:0.3s;
}
.banner-btn:hover{
    background:#fff8f0;
}
/*===== 难题标题模块 =====*/
.problem-title{
    width:100%;
    padding:80px 20px;
    background:#f7fbff;
}
.problem-title .container{
    max-width:1200px;
    margin:0 auto;
    text-align:center;
}
.problem-title h2{
    font-size:48px;
    color:#222;
    font-weight:bold;
    position:relative;
    padding-bottom:24px;
}
.problem-title h2::after{
    content:"";
    position:absolute;
    left:50%;
    transform:translateX(-50%);
    bottom:0;
    width:180px;
    height:2px;
    background:#b8c2cc;
}
/*===== 难题卡片 =====*/
.problem-card-wrap{
    width:100%;
    padding:90px 20px;
    background:#f7fbff;
}
.problem-card-wrap .container{
    max-width:1320px;
    margin:0 auto;
}
.problem-card-wrap .row{
    display:grid;
    grid-template-columns: 1fr 1fr;
    gap:40px;
}
.problem-card{
    background:#ffffff;
    border-radius:28px;
    box-shadow:0 6px 34px rgba(0,0,0,0.08);
    padding:48px;
    position:relative;
    overflow:hidden;
    min-height:760px;
}
.problem-card h3{
    font-size:36px;
    color:#222;
    margin:0 0 36px;
    font-weight:bold;
}
.tag-group{
    display:flex;
    flex-wrap:wrap;
    gap:20px;
}
.tag-item{
    background:#ff7320;
    color:#fff;
    font-size:18px;
    padding:12px 24px;
    border-radius:999px;
    box-shadow:0 3px 10px rgba(255,115,32,0.35);
}
.left-tag{
    justify-content:flex-start;
}
.right-tag{
    justify-content:flex-end;
}
.card-img{
    position:absolute;
    bottom:0;
    left:0;
    width:100%;
    text-align:center;
    padding-bottom:10px;
}
.card-img img{
    width:50%;
    max-width:420px;
}
/*===== 服务标题区块 =====*/
.service-title-block{
    width:100%;
    padding:80px 20px;
    background-color:#f0f4f8;
    text-align:center;
}
.service-title-block .container{
    max-width:1200px;
    margin:0 auto;
}
.service-title-block h2{
    font-size:48px;
    color:#222222;
    font-weight:bold;
    margin:0 0 24px;
}
.service-title-block .line{
    width:180px;
    height:2px;
    background:#c8ced6;
    margin:0 auto 24px;
}
.service-title-block .en-title{
    font-size:30px;
    color:#333;
    margin:0 0 40px;
    font-weight:400;
}
.service-title-block .desc{
    font-size:26px;
    color:#666666;
    margin:0;
}
/*===== 服务卡片模块 =====*/
.service-item-wrap{
    width:100%;
    padding:60px 20px;
    background:#f0f4f8;
}
.service-item-wrap .container{
    max-width:1320px;
    margin:0 auto;
}
.service-card{
    background: #f8fafc;
    border-radius:32px;
    box-shadow: 0 2px 20px rgba(0,0,0,0.04);
    padding:60px;
    display:grid;
    grid-template-columns: 1fr 1fr;
    gap:40px;
    align-items:center;
}
.service-card.reverse{
    grid-template-columns: 1fr 1fr;
}
.text-part h3{
    font-size:40px;
    color:#ff6c22;
    display:flex;
    align-items:center;
    gap:12px;
    margin:0 0 24px;
}
.icon-box{
    display:inline-block;
    width:42px;
    height:42px;
    background:linear-gradient(135deg,#ffb070,#ff6c22);
    border-radius:8px;
}
.title-desc{
    font-size:24px;
    color:#222;
    margin:0 0 32px;
}
.feature-list{
    padding:0;
    margin:0;
    list-style:none;
}
.feature-list li{
    font-size:18px;
    color:#444;
    line-height:1.8;
    margin-bottom:22px;
    padding-left:28px;
    position:relative;
}
.feature-list li::before{
    content:"✅";
    position:absolute;
    left:0;
    top:0;
}
.img-wrap img{
    width:100%;
    display:block;
}
/*===== 视频案例模块 =====*/
.video-case-wrap{
    width:100%;
    padding:80px 0;
    background:#f0f4f8;
}
.video-case-wrap .container{
    max-width:1320px;
    margin:0 auto;padding:0 20px;
}
.video-case-wrap h2{
    font-size:42px;
    text-align:center;
    color:#222;
    margin:0 0 12px;
}
.video-case-wrap .sub-title{
    text-align:center;
    color:#666;
    font-size:18px;
    margin-bottom:50px;
}
.video-grid{
    display:grid;
    grid-template-columns: repeat(3,1fr);
    gap:30px;
}
.video-card{
    background:#fff;
    border-radius:24px;
    overflow:hidden;
    box-shadow:0 4px 20px rgba(0,0,0,.06);
    cursor:pointer;
    transition:transform .25s ease, box-shadow .25s ease;
}
.video-card:hover{
    transform:translateY(-6px);
    box-shadow:0 12px 30px rgba(0,0,0,.1);
}
.video-cover{
    position:relative;
    width:100%;
    padding-top:56.25%;
    overflow:hidden;
    background:#000;
}
.video-cover img{
    position:absolute;
    left:0;
    top:0;
    width:100%;
    height:100%;
    object-fit:cover;
    display:block;
}
.play-btn{
    position:absolute;
    left:50%;
    top:50%;
    transform:translate(-50%,-50%);
    width:84px;
    height:84px;
    border-radius:50%;
    background:rgba(255,115,32,.92);
    box-shadow:0 0 0 10px rgba(255,115,32,.25);
    z-index:2;
}
.play-btn::before{
    content:"";
    position:absolute;
    left:50%;
    top:50%;
    transform:translate(-45%,-50%);
    width:0;
    height:0;
    border-left:24px solid #fff;
    border-top:16px solid transparent;
    border-bottom:16px solid transparent;
}
.video-info{
    padding:28px;
}
.video-info h4{
    font-size:22px;
    color:#222;
    margin:0 0 10px;
}
.video-info p{
    font-size:15px;
    color:#555;
    margin:0;
    line-height:1.7;
}
.video-modal{
    position:fixed;
    left:0;
    top:0;
    width:100%;
    height:100%;
    z-index:9999;
    display:none;
    align-items:center;
    justify-content:center;
}
.video-modal.active{
    display:flex;
}
.video-mask{
    position:absolute;
    left:0;
    top:0;
    width:100%;
    height:100%;
    background:rgba(0,0,0,.72);
}
.video-modal-box{
    position:relative;
    width:92%;
    max-width:960px;
    z-index:2;
}
.video-modal-box video{
    width:100%;
    border-radius:16px;
    display:block;
}
.video-close{
    position:absolute;
    right:-40px;
    top:-40px;
    width:36px;
    height:36px;
    line-height:36px;
    text-align:center;
    color:#fff;
    font-size:30px;
    cursor:pointer;
    user-select:none;
}
/*===== 合作品牌模块 =====*/
.brand-wrap{
    width:100%;
    background:#071030;
    padding:80px 20px;
}
.brand-container{
    max-width:1200px;
    margin:0 auto;
}
.brand-title{
    text-align:center;
    color:#fff;
    font-size:36px;
    font-weight:bold;
    margin-bottom:48px;
}
.brand-grid{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:24px;
}
.brand-card{
    border-radius:16px;
    overflow:hidden;
    position:relative;
}
.brand-card img{
    width:100%;
    display:block;
}
.brand-card-header{
    position:absolute;
    top:24px;
    left:24px;
    display:flex;
    align-items:center;
    gap:12px;
}
.brand-logo{
    width:72px;
    height:72px;
    border-radius:50%;
    background:#fff;
    display:flex;
    align-items:center;
    justify-content:center;
}
.brand-logo img{
    width:80%;
    height:80%;
    object-fit:contain;
}
.brand-name{
    color:#fff;
    font-size:24px;
    font-weight:600;
}
/*===== CTA合作区块 =====*/
.cta-wrap{
    width:100%;
    background:#f0f2f5;
    padding:80px 20px;
}
.cta-container{
    max-width:1200px;
    margin:0 auto;
}
.cta-box{
    background:#071030;
    border-radius:16px;
    padding:110px 30px;
    text-align:center;
    color:#ffffff;
}
.cta-title{
    font-size:58px;
    font-weight:bold;
    margin-bottom:26px;
}
.cta-desc{
    font-size:24px;
    opacity:0.92;
    margin-bottom:44px;
    line-height:1.7;
}
.cta-btn{
    display:inline-block;
    padding:20px 64px;
    background:#ffffff;
    color:#ff6700;
    border-radius:999px;
    font-size:26px;
    font-weight:600;
    text-decoration:none;
    border:none;
    transition:all 0.3s ease;
}
.cta-btn:hover{
    transform:translateY(-3px);
    box-shadow:0 10px 26px rgba(255,103,0,0.28);
}
/*===== 移动端统一适配 =====*/
@media(max-width: 992px){
    .banner-title{
        font-size:32px;
    }
    .banner-sub{
        font-size:18px;
    }
    .banner-btn{
        font-size:20px;
        padding:14px 40px;
    }
    .banner-hero{
        min-height:420px;
    }
}
@media(max-width:768px){
    .problem-title h2{
        font-size:28px;
    }
    .problem-title{
        padding:50px 15px;
    }
    .problem-card-wrap{
        padding:60px 15px;
    }
    .problem-card-wrap .row{
        grid-template-columns:1fr;
        gap:30px;
    }
    .problem-card{
        padding:30px;
        min-height:560px;
    }
    .problem-card h3{
        font-size:26px;
    }
    .tag-item{
        font-size:15px;
        padding:10px 18px;
    }
    .card-img img{
        width:72%;
    }
    .service-title-block{
        padding:50px 15px;
    }
    .service-title-block h2{
        font-size:36px;
    }
    .service-title-block .en-title{
        font-size:24px;
    }
    .service-title-block .desc{
        font-size:20px;
    }
    .service-title-block .line{
        width:100px;
    }
    .service-card,
    .service-card.reverse{
        grid-template-columns:1fr;
        padding:30px 24px;
    }
    .text-part h3{
        font-size:28px;
    }
    .title-desc{
        font-size:18px;
    }
    .feature-list li{
        font-size:16px;
    }
    .video-grid{
        grid-template-columns:1fr;
    }
    .video-case-wrap h2{
        font-size:30px;
    }
    .play-btn{
        width:64px;
        height:64px;
    }
    .play-btn::before{
        border-left:18px solid #fff;
        border-top:12px solid transparent;
        border-bottom:12px solid transparent;
    }
    .video-close{
        right:0;
        top:-44px;
    }
    .brand-wrap{
        padding:40px 16px;
    }
    .brand-title{
        font-size:26px;
        margin-bottom:30px;
    }
    .brand-grid{
        grid-template-columns:1fr;
        gap:16px;
    }
    .brand-card-header{
        top:16px;
        left:16px;
    }
    .brand-logo{
        width:60px;
        height:60px;
    }
    .brand-name{
        font-size:20px;
    }
    .cta-wrap{
        padding:40px 16px;
    }
    .cta-box{
        padding:60px 20px;
    }
    .cta-title{
        font-size:34px;
        margin-bottom:18px;
    }
    .cta-desc{
        font-size:18px;
        margin-bottom:30px;
    }
    .cta-btn{
        padding:15px 42px;
        font-size:20px;
    }
    
    /*===== 视频弹窗样式（非全屏）=====*/
.video-modal{
    display: none;
    position: fixed;
    top:0;
    left:0;
    width:100%;
    height:100%;
    z-index:9999;
}
.video-modal.active{
    display:block;
}
.video-mask{
    position:absolute;
    top:0;
    left:0;
    width:100%;
    height:100%;
    background:rgba(0,0,0,0.75);
}
.video-modal-box{
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 90%;
    max-width: 900px;
    background: #000;
    border-radius: 12px;
    padding:16px;
    box-sizing: border-box;
}
.video-modal-box video{
    width:100%;
    display:block;
    border-radius:8px;
}
/* 关闭按钮 放大+置顶 */
.video-close{
    position: absolute;
    top: -30px;
    right:0;
    font-size:36px;
    color:#fff;
    cursor:pointer;
    z-index:100;
    line-height:1;
    user-select:none;
}
.video-close:hover{
    color:#ff4444;
}
/* 移动端适配 */
@media (max-width:768px){
    .video-modal-box{
        max-width:96%;
    }
    .video-close{
        top:-26px;
        font-size:30px;
    }
}

}
</style>