.loader {
    position: relative;
    margin: 0 auto;
    width: 100px;
}

.loader:before {
    content: '';
    display: block;
    padding-top: 100%;
}

.circular {
    animation: rotate 2s linear infinite;
    height: 100%;
    transform-origin: center center;
    width: 100%;
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    margin: auto;
}

.path {
    stroke-dasharray: 1, 200;
    stroke-dashoffset: 0;
    animation: dash 1.5s ease-in-out infinite, color-fade 3s ease-in-out infinite;
    stroke-linecap: round;
    stroke-width: 3;
}

@keyframes rotate {
    100% {
        transform: rotate(360deg);
    }
}

@keyframes dash {
    0% {
        stroke-dasharray: 1, 200;
        stroke-dashoffset: 0;
    }
    50% {
        stroke-dasharray: 89, 200;
        stroke-dashoffset: -35px;
    }
    100% {
        stroke-dasharray: 89, 200;
        stroke-dashoffset: -124px;
    }
}

@keyframes color-fade {
    0%,
    100% {
        stroke: #000000;
        /* 纯黑 */
    }
    50% {
        stroke: #888888;
        /* 中灰色 */
    }
}

body {
    background-color: #f5f5f5;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    overflow: hidden;
    animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translate(-50%, -50%) scale(0.95);
        /* 添加轻微缩放动画 */
    }
    to {
        opacity: 1;
        transform: translate(-50%, -50%) scale(1);
    }
}

.showbox {
    position: relative;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    /* padding: 5%; */
}