/* 定义动画 */
    @keyframes float-up-down {

        0%,
        100% {
            transform: translateY(0);
        }

        50% {
            transform: translateY(-6.25rem);
        }
    }

    @keyframes float-up-down1 {

        0%,
        100% {
            transform: translateY(0);
        }

        50% {
            transform: translateY(-12.5rem);
        }
    }

    /* 定义左右移动动画 */
    @keyframes move-left-right {

        0%,
        100% {
            transform: translateX(0);
        }

        50% {
            transform: translateX(-6.25rem);
        }
    }

    @keyframes move-right-left {

        0%,
        100% {
            transform: translateX(0);
        }

        50% {
            transform: translateX(6.25rem);
        }
    }

    body,
    html {
        margin: 0;
        padding: 0;
        height: 100%;
        font-family: Arial, sans-serif;
        overflow: hidden;
    }

    .zhanshu_bg1,
    .zhanshu_bg2,
    .zhanshu_bg3,
    .zhanshu_bg4,
    .zhanshu_bg5,
    .zhanshu_bg6,
    .zhanshu_bg7 {
        position: absolute;
    }

    /* 应用到所有元素 */
    .zhanshu_bg1,
    .zhanshu_bg2 {
        animation: float-up-down1 7s ease-in-out infinite;
    }

    .zhanshu_bg3,
    .zhanshu_bg4,
    .zhanshu_bg5 {
        animation: float-up-down 4s ease-in-out infinite;
    }

    /* 可选：错开动画时间（波浪效果） */
    .zhanshu_bg2 {
        animation-delay: 0.2s;
    }

    .zhanshu_bg3 {
        animation-delay: 0.4s;
    }

    .zhanshu_bg4 {
        animation-delay: 0.6s;
    }

    .zhanshu_bg5 {
        animation-delay: 0.8s;
    }

    .zhanshu_bg6 {
        animation: move-left-right 5s ease-in-out infinite;
        position: absolute;
    }

    .zhanshu_bg7 {
        animation: move-right-left 5s ease-in-out infinite;
        position: absolute;
    }

    .zhanshu_bg1 {
        top: 52%;
        left: 8.4%;
        height: 2.8125rem;
    }

    .zhanshu_bg2 {
        top: 56%;
        left: 23.5%;
        height: 3.125rem;
    }

    .zhanshu_bg3 {
        top: 34%;
        right: 19.5%;
        height: 5.625rem;
    }

    .zhanshu_bg4 {
        top: 48%;
        right: 12%;
        height: 5.3125rem;
    }

    .zhanshu_bg5 {
        top: 65%;
        right: 21.5%;
    }

    .zhanshu_bg6 {
        bottom: -3%;
        width: 110%;
    }

    .zhanshu_bg7 {
        right: 0%;
        bottom: 0%;
    }

    .login-container {
        background-image: url(/static/images/login/zhanshu_bg.png);
        background-repeat: no-repeat;
        background-size: cover;
        background-position: center;
        background-attachment: fixed;
        min-height: 100vh;
        position: relative;
    }

    .logo {
        position: absolute;
        top: 8.25rem;
        left: 50%;
        transform: translate(-50%, -50%);
        height: 4.75rem;
    }

    .login-card {
        position: absolute;
        display: flex;
        flex-direction: column;
        align-items: center;
        margin-top: 6.25rem;
        top: 47%;
        left: 50%;
        transform: translate(-50%, -50%);
        width: 35.5625rem;
        height: 37.6875rem;
        border-radius: 3.125rem;
        background: rgba(255, 255, 255, 1);
    }

    .login-title {
        margin-top: 2.125rem;
        font-size: 2.75rem;
        text-align: center;
        margin-bottom: 1rem;
        color: rgba(0, 0, 0, 1);
    }

    .system-name {
        font-size: 1.25rem;
        color: rgba(140, 140, 140, 1);
        text-align: center;
        margin-bottom: 2.5rem;
        font-weight: 700;
    }

    .input-group {
        display: flex;
        align-items: center;
        border: .125rem solid rgba(0, 0, 0, 1);
        margin-top: .5625rem;
        border-radius: 3.125rem;
        padding: 0 1.25rem;
        margin-bottom: 3.4375rem;
        height: 2.8125rem;
        width: 25.125rem;
    }

    .input-icon {
        margin-right: .625rem;

        img {
            width: 1.875rem;
            height: 1.875rem;
        }
    }

    .input-field {
        flex: 1;
        height: 1.375rem;
        font-size: 1.875rem;
        color: #333;
        border: none;
        outline: none;
        padding-top: 0;
    }

    .input-field::placeholder {
        color: rgba(207, 207, 207, 1);
        font-weight: 700;
        font-size: 1.1875rem;
        line-height: 1;
        transform: translateY(-0.125rem);
        display: inline-block;
    }

    .login-btn {
        width: 28.75rem;
        height: 3.125rem;
        display: flex;
        align-items: center;
        justify-content: center;
        background: rgba(84, 127, 255, 1);
        color: white;
        border: none;
        border-radius: 3.125rem;
        font-size: 1.5rem;
        margin-top: 6.875rem;
        cursor: pointer;
    }

    .login-btn:hover {
        opacity: 0.9;
    }

    .botton_logo {
        position: absolute;
        background-repeat: no-repeat;
        height: 5.75rem;
        width: 5.75rem;
        right: 3%;
        bottom: 3.125rem;
    }

    .input-field {
        transition: all 0.3s ease;
    }

    .input-group:hover {
        transform: scale(1.02);
        box-shadow: 0 0 0.3125rem rgba(0, 0, 0, 0.1);
    }

    .input-group {
        transition: all 0.3s ease;
        display: flex;
        align-items: center;
    }

    input:-webkit-autofill,
    input:-webkit-autofill:hover,
    input:-webkit-autofill:focus,
    input:-webkit-autofill:active,
    input:-internal-autofill-selected {
        -webkit-box-shadow: 0 0 0 62.5rem white inset !important;
        background-color: white !important;
        background-image: none !important;
        color: inherit !important;
        border: 0 !important;
    }