body {
     margin: 0;
     padding: 0;
     font-family: 'Microsoft YaHei', Arial, sans-serif;
     background: #fff;
 }

 .container {
     max-width: 1100px;
     margin: 40px auto 0 auto;
     padding: 0 20px;
 }

 .title {
     text-align: center;
     font-size: 32px;
     font-weight: bold;
     margin-bottom: 8px;
     margin-top: 0;
 }

 .subtitle {
     text-align: center;
     font-size: 16px;
     color: #888;
     letter-spacing: 2px;
     margin-bottom: 16px;
 }

 .dashed-line {
     width: 220px;
     height: 1px;
     border-bottom: 2px dashed #d2b48c;
     margin: 0 auto 32px auto;
 }

 .cases-grid {
     display: grid;
     grid-template-columns: repeat(4, 1fr);
     grid-template-rows: repeat(2, 1fr);
     gap: 0;
     width: 100%;
     aspect-ratio: 3/2;
     min-height: 600px;
 }

 .case-block {
     position: relative;
     min-height: 300px;
     display: flex;
     flex-direction: column;
     justify-content: center;
     background-size: cover;
     background-position: center;
     color: #fff;
 }

 .case-block.blue {
     background: #2176b8;
     color: #fff;
 }

 .case-block .case-content {
     padding: 32px 24px 24px 24px;
 }

 .case-block h3 {
     font-size: 20px;
     font-weight: bold;
     margin: 0 0 12px 0;
 }

 .case-block p {
     font-size: 16px;
     margin: 0;
     line-height: 1.7;
 }

 /* 左右箭头 */
 .arrow-btn {
     position: absolute;
     top: 50%;
     transform: translateY(-50%);
     width: 36px;
     height: 36px;
     background: #fff;
     border-radius: 50%;
     box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
     display: flex;
     align-items: center;
     justify-content: center;
     cursor: pointer;
     z-index: 10;
 }

 .arrow-btn.left {
     left: -60px;
 }

 .arrow-btn.right {
     right: -60px;
 }

 .arrow-btn img {
     width: 18px;
     height: 18px;
 }

 @media(min-width:1024px) {
     #mobile_header-container {
         display: none;
     }
    
 }

 @media(max-width:1025px) {
     #header-container {
         display: none;
     }
      .csr-head-text {
        width: 100%;
     }
     .img-title img {
         display: none;
     }
     .advertime_box {
        width: 50%;
     }
     .img-title {
        
         max-width: 100%;
     }
     .advertime_item {
        width: 100%;
         display: flex;
         flex-wrap: wrap;
         justify-content: space-between;
     }
 }

 @media (max-width: 900px) {
     .cases-grid {
         grid-template-columns: 1fr;
         grid-template-rows: repeat(6, 1fr);
         aspect-ratio: unset;
     }

     .img-title img {
         display: none;
     }

     .img-title {
         display: flex;
         flex-wrap: wrap;
         max-width: 100%;
     }

     .arrow-btn.left,
     .arrow-btn.right {
         display: none;
     }
 }