body {
 font-family: Arial, sans-serif;
 /* background-image: linear-gradient(to right, #200652, #000000); */
 background-size: 200% 100%;
 animation: gradientAnimation 10s ease-in-out infinite;
 }


        h1 {
            text-align: center;
            color: #555;
        }

        form {
            text-align: center;
            margin-bottom: 20px;
        }

        label {
            font-weight: bold;
        }

select {
    padding: 9px 10px 11px;
    width: 480px;
    font-size: 16px;
    background-image: linear-gradient(to right, #ffffff6b, #ffffff);
    font-weight: bold;
    color: #555;
    /* border-radius: 10px; */
}

@media only screen and (max-width: 500px) {
    select {
        width: 375px;
    }
}

@media only screen and (max-width: 400px) {
    select {
        width: 335px;
    }
}


.file-list {
    text-align: center;
    width: 100%;
    max-width: 500px;
    color: #0f153e;
    margin: auto;
    margin-bottom: 60px;
}

@media only screen and (max-width: 500px) {
    .file-list {
        max-width: 400px;
    }
}

@media only screen and (max-width: 400px) {
    .file-list {
        max-width: 360px;
    }
}


        .file-item {
            display: flex;
            align-items: center;
            margin: 10px;
            padding-top: 5px;
            padding-bottom: 5px;
            padding-left: 10px;
            /* border-radius: 10px; */
            /* background: linear-gradient(90deg, #5457c3 0%, #0f153e 100%); */
            padding-right: 10px;
            border: 1px solid #5557bc;
            text-align: center;
        }

        .file-name {
            margin-right: 10px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            color: #555;
        }

        .file-name:hover {
            white-space: normal;
            overflow: visible;
            text-overflow: unset;
        }

        .file-link {
            color: #ffffff;
            text-decoration: none;
            margin-left: auto;
            padding: 4px 10px;
            background: #555;
            border-radius: 5px;
            white-space: nowrap;
        }

        .file-link-button {
            display: flex;
            justify-content: flex-end;
        }

        .load-more {
            text-align: center;
            margin-top: 20px;
        }

        .load-more button {
            padding: 10px 20px;
            font-size: 16px;
            border-radius: 5px;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            /*padding: 20px;*/
        }
        
        /* 媒体查询 */
        @media (max-width: 768px) {
            /* 在小屏幕上的样式 */
            .container {
                padding: 10px;
            }
        }
        
        /*在线客服*/
     .floating-button {
    position: fixed;
    bottom: 100px;
    right: 20px;
    width: 50px;
    height: 50px;
    background-image: linear-gradient(to right, #9749e6, #375dd4);
    background-size: 200% 100%;
    animation: gradientAnimation 10s ease-in-out infinite;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.3s;
    color: #fff;
    font-weight: bold;
    text-align: center;
    line-height: 1;
    font-size: 12px;
    white-space: nowrap;
  }

  .floating-button:hover {
    background-color: #3c1f6e;
  }

  .contact-module {
    position: fixed;
    bottom: 50px;
    right: 20px;
    text-align: center;
    opacity: 0;
    transition: opacity 0.3s;
    padding: 10px;
    background-color: #fff;
    border: 1px solid #ccc;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
    z-index: 999;
  }

  .floating-button:hover + .contact-module,
  .contact-module:hover {
    opacity: 1;
  }
   /*在线客服*/