.di9-1 {
    height: 840px;
    background-color: #060606;
   
}


.di9-2 {
     margin-top: 30px;
    width: 1200px;
    height: 550px;
    
    margin: 0 auto;
}


.di9-3  h3 {
padding-top: 120px;
    text-align: center; 
    font-size: 45px;
}

.di9-4 {
    background-image: url(./images/ndfbdf.jpg);
    margin-top: 60px;
    width: 1200px;
    height: 355px;
  
}
/* 浮动 */
.data {
    width: 1200px;
    height: 800px;
   
    margin: 0 auto;
}
        
        .containermo {
            position: relative;
            display: flex;
            gap: 60px;
            padding: 50px;
        }
        
      .containermo div { 
        border-radius: 8px;
        width: 300px;
            height: 160px;
            background-color: #1b1b1d;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
        }

 .containermi {
            position: relative;
            display: flex;
            gap: 60px;
            padding: 50px;
        }
        
      .containermi div {
         border-radius: 8px;
        width: 300px;
            height: 160px;
            background-color: #1b1b1d;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
        }

 .containermo div h4 {
    font-size: 24px;
 }

 .containermi div h4 {
    font-size: 24px;
 }

.di9-5 {
    padding: 30px 30px;
}


.rectangle1 {
    margin: 0px 40px 0px 30px;
}

.rectangle2 {
    margin: 30px 0px 0px 350px;
}
.rectangle3 {
    margin: 0px 0px 0px 120px;
}

.rectangle4 {
    margin: 0px 0px 0px 80px;
}


        
        /* 每个矩形不同的浮动动画 */
        .rectangle1:nth-child(1) {
            animation: float 4s ease-in-out infinite;
        }
        
        .rectangle2:nth-child(2) {
            animation: float 5s ease-in-out infinite;
            animation-delay: 0.5s;
        }
        
        .rectangle3:nth-child(1) {
            animation: float 3.5s ease-in-out infinite;
            animation-delay: 1s;
        }
        
        .rectangle4:nth-child(2) {
            animation: float 4.5s ease-in-out infinite;
            animation-delay: 1.5s;
        }
        
        /* 浮动动画 */
       @keyframes float {
            0%, 100% {
                transform: translateY(0);
            }
            50% {
                transform: translateY(-40px);
            }
        }
        
        /* 响应式设计 */
        @media (max-width: 768px) {
            .containermo {
                flex-direction: column;
                gap: 80px;
            }
             .containermi {
                flex-direction: column;
                gap: 80px;
            }
            
           .containermo div {
                width: 70px;
                height: 100px;
            }
             .containermi div {
                width: 70px;
                height: 100px;
            }
        }