* {
        border: 0px;
        margin: 0px;
        padding: 0px;

    }

    body{
        display: flex;
        flex-wrap: nowrap;
        flex-direction: column;
        justify-content: center;
        background-color: rgb(94, 163, 242);
    }

    .header_logo{
        position: relative;
        left: 30px;
        top: 20px;
    }

    .header {
        position: relative;
        height: 160px;
        min-width: 1920px;
        background-color: rgb(52, 126, 213);
    }

    .banner {
        position: relative;
        width: 100%;
        min-width: 1920px;
        min-height: 0; /* 清除旧高度限制 */
        aspect-ratio: 1920 / 660; /* 关键：保持图片原始比例 */
        background-image: url('../img/banner.png');
        background-repeat: no-repeat;
        background-position: center;
        background-size: 100% 100%; /* 关键：完整铺满，不裁切 */
    }

    .banner a{
        display: flex;
        flex-direction: row-reverse;
        position: absolute;
        top: 89.5454%;
        right: 9%;
        height: 7.575757%;
        width: 10.57291666%;
    }

    .footer {
        position: relative;
        display: flex;
        flex-direction: row;
        justify-content: space-between;
        height: 346px;
        min-width: 1920px;
        background-color: rgb(52, 126, 213);
        background-repeat: no-repeat;
        background-size: cover;
        z-index: 20;
    }

    .lefttext{
        position: absolute;
        display: flex;
        flex-direction: column;
        gap: 30px;
        top: 80px;
        left: 245px;
    }

    .header_logo {
        position: absolute;
        top: 33px;
        left: 46px;
    }

    .footer_logo_u {
        display: flex;
        flex-direction: row;
        top: 76px;
        left: 260px;    
    }

    .footer_logo_d {
        display: flex;
        flex-direction: column;
        gap: 20px;
        top: 196px;
        left: 260px;
        color: white;
    }

    .logoimg{
        position: relative;
        display: flex;
        flex-direction: column;
        gap: 40px;
        left: 20px;
    }

    .logo{
        display: flex;
        flex-direction: column;
    }

    .weixin {
        position: relative;
        top: 0px;
    }

    .weibo{
        position: relative;
        top: 10px;
    }

    .logo img{
        position: absolute;
    }

    .logo img:last-child{
        opacity: 0;
    }

    .animate_logo_enter{
        animation: logoenter 1s forwards;
    }

    .animate_logo_leave{
        animation: logoleave 1s forwards;
    }

    @keyframes logoenter {
        0%{
            opacity: 0;
        }  
        100%{
            opacity: 1;
        }  
    }

    @keyframes logoleave {
        0%{
            opacity: 1;
        }
        100%{
            opacity: 0;
        }
    }

    .qrimg{
        position: absolute;
        display: flex;
        flex-direction: column;
        top: 30px;
        left: 520px;
    }

    .qrimg img:last-child{
        position: absolute;
        top: 50px;
    }

    .qrimg img{
        position: relative;
        opacity: 0;
    }

    .qrenter{
        animation: qrenter1 1s forwards;
    }

    .qrleave{
        animation: qrleave1 1s forwards;
    }

    @keyframes qrenter1 {
        0%{
            opacity: 0;
            left: 300px;
        }
        100%{
            opacity: 1;
            left: 30px;
        }
    }

    @keyframes qrleave1 {
        0%{
            opacity: 1;
            left: 30px;
        }
        100%{
            opacity: 0;
            left: 300px;
        }
    }

    .righttext {
        display: flex;
        flex-direction: column;
        gap: 20px;
        position: absolute;
        right: 260px;
        top: 66px;
        height: 120px;
        text-align: right;
        line-height: 0px;
        margin:0px
    }

    .righttext p {
        color: white;
        display: block;
        margin-top: 1em;
        gap: 6px;
        margin-bottom: 1.9em;
    }

    .footlinks {
        height: 30px;
        display: flex;
        flex-direction: row-reverse;
        gap: 75px;
    }

    .friendlinks a {
        font-size: 20px;
        text-decoration: none;
        color: white;
        outline: none;
    }

    .friendemail a{
        font-size: 20px;
        text-decoration: none;
        color: white;
        outline: none;
    }