.index_loading  {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}
.pl {
    width: 6em;
    height: 6em;
}

.pl__ring {
    animation: ringA 2s linear infinite;
}

.pl__ring--a {
    stroke: #f42f25;
}

.pl__ring--b {
    animation-name: ringB;
    stroke: #f49725;
}

.pl__ring--c {
    animation-name: ringC;
    stroke: #255ff4;
}

.pl__ring--d {
    animation-name: ringD;
    stroke: #f42582;
}

/* Animations */
@keyframes ringA {
    from, 4% {
        stroke-dasharray: 0 660;
        stroke-width: 20;
        stroke-dashoffset: -330;
    }

    12% {
        stroke-dasharray: 60 600;
        stroke-width: 30;
        stroke-dashoffset: -335;
    }

    32% {
        stroke-dasharray: 60 600;
        stroke-width: 30;
        stroke-dashoffset: -595;
    }

    40%, 54% {
        stroke-dasharray: 0 660;
        stroke-width: 20;
        stroke-dashoffset: -660;
    }

    62% {
        stroke-dasharray: 60 600;
        stroke-width: 30;
        stroke-dashoffset: -665;
    }

    82% {
        stroke-dasharray: 60 600;
        stroke-width: 30;
        stroke-dashoffset: -925;
    }

    90%, to {
        stroke-dasharray: 0 660;
        stroke-width: 20;
        stroke-dashoffset: -990;
    }
}

@keyframes ringB {
    from, 12% {
        stroke-dasharray: 0 220;
        stroke-width: 20;
        stroke-dashoffset: -110;
    }

    20% {
        stroke-dasharray: 20 200;
        stroke-width: 30;
        stroke-dashoffset: -115;
    }

    40% {
        stroke-dasharray: 20 200;
        stroke-width: 30;
        stroke-dashoffset: -195;
    }

    48%, 62% {
        stroke-dasharray: 0 220;
        stroke-width: 20;
        stroke-dashoffset: -220;
    }

    70% {
        stroke-dasharray: 20 200;
        stroke-width: 30;
        stroke-dashoffset: -225;
    }

    90% {
        stroke-dasharray: 20 200;
        stroke-width: 30;
        stroke-dashoffset: -305;
    }

    98%, to {
        stroke-dasharray: 0 220;
        stroke-width: 20;
        stroke-dashoffset: -330;
    }
}

@keyframes ringC {
    from {
        stroke-dasharray: 0 440;
        stroke-width: 20;
        stroke-dashoffset: 0;
    }

    8% {
        stroke-dasharray: 40 400;
        stroke-width: 30;
        stroke-dashoffset: -5;
    }

    28% {
        stroke-dasharray: 40 400;
        stroke-width: 30;
        stroke-dashoffset: -175;
    }

    36%, 58% {
        stroke-dasharray: 0 440;
        stroke-width: 20;
        stroke-dashoffset: -220;
    }

    66% {
        stroke-dasharray: 40 400;
        stroke-width: 30;
        stroke-dashoffset: -225;
    }

    86% {
        stroke-dasharray: 40 400;
        stroke-width: 30;
        stroke-dashoffset: -395;
    }

    94%, to {
        stroke-dasharray: 0 440;
        stroke-width: 20;
        stroke-dashoffset: -440;
    }
}

@keyframes ringD {
    from, 8% {
        stroke-dasharray: 0 440;
        stroke-width: 20;
        stroke-dashoffset: 0;
    }

    16% {
        stroke-dasharray: 40 400;
        stroke-width: 30;
        stroke-dashoffset: -5;
    }

    36% {
        stroke-dasharray: 40 400;
        stroke-width: 30;
        stroke-dashoffset: -175;
    }

    44%, 50% {
        stroke-dasharray: 0 440;
        stroke-width: 20;
        stroke-dashoffset: -220;
    }

    58% {
        stroke-dasharray: 40 400;
        stroke-width: 30;
        stroke-dashoffset: -225;
    }

    78% {
        stroke-dasharray: 40 400;
        stroke-width: 30;
        stroke-dashoffset: -395;
    }

    86%, to {
        stroke-dasharray: 0 440;
        stroke-width: 20;
        stroke-dashoffset: -440;
    }
}

#catalogModal .modal-content {
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
    border: none;
    max-width: 420px;
    margin: 0 auto;
}

#catalogModal .modal-header {
    background: linear-gradient(135deg, #5a5ac9, #8a72e0);
    position: relative;
}

#catalogModal .modal-body {
    background: #fff;
}

#catalogModal .close-btn {
    transition: all 0.3s ease;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

#catalogModal .close-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.1);
}

@keyframes gentleBounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
}

#catalogModal .input-group-text {
    border-radius: 8px 0 0 8px !important;
    border: 1px solid #ebebeb;
    border-right: none;
}

#catalogModal .form-control {
    border-radius: 0 8px 8px 0 !important;
    border: 1px solid #ebebeb;
    border-left: none;
    font-size: 14px;
}

#catalogModal .form-control:focus {
    box-shadow: none;
    border-color: #5a5ac9;
}

#catalogModal .btn-primary {
    background: linear-gradient(135deg, #5a5ac9, #8a72e0);
    border: none;
    transition: all 0.3s ease;
    font-size: 14px;
}

#catalogModal .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(90, 90, 201, 0.3);
}

/* 响应式调整 */
@media (max-width: 576px) {
    #catalogModal .modal-dialog {
        margin: 20px;
    }

    #catalogModal .modal-content {
        max-width: 100%;
    }
}