Loading 动画 - 螺旋

            
            body {
    background: #282c34;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.container {
    --uib-size: 45px;
    --uib-color: #c7f93e;
    --uib-speed: 2.5s;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: var(--uib-size);
    width: var(--uib-size);
}

.slice {
    position: relative;
    height: calc(var(--uib-size) / 6);
    width: 100%;
}

.slice::before,
.slice::after {
    --uib-a: calc(var(--uib-speed) / -2);
    --uib-b: calc(var(--uib-speed) / -6);
    content: '';
    position: absolute;
    top: 0;
    left: calc(50% - var(--uib-size) / 12);
    height: 100%;
    width: calc(100% / 6);
    border-radius: 50%;
    background-color: var(--uib-color);
    flex-shrink: 0;
    animation: orbit var(--uib-speed) linear infinite;
    transition: background-color 0.3s ease;
}

.slice:nth-child(1)::after {
    animation-delay: var(--uib-a);
}

.slice:nth-child(2)::before {
    animation-delay: var(--uib-b);
}

.slice:nth-child(2)::after {
    animation-delay: calc(var(--uib-a) + var(--uib-b));
}

.slice:nth-child(3)::before {
    animation-delay: calc(var(--uib-b) * 2);
}

.slice:nth-child(3)::after {
    animation-delay: calc(var(--uib-a) + var(--uib-b) * 2);
}

.slice:nth-child(4)::before {
    animation-delay: calc(var(--uib-b) * 3);
}

.slice:nth-child(4)::after {
    animation-delay: calc(var(--uib-a) + var(--uib-b) * 3);
}

.slice:nth-child(5)::before {
    animation-delay: calc(var(--uib-b) * 4);
}

.slice:nth-child(5)::after {
    animation-delay: calc(var(--uib-a) + var(--uib-b) * 4);
}

.slice:nth-child(6)::before {
    animation-delay: calc(var(--uib-b) * 5);
}

.slice:nth-child(6)::after {
    animation-delay: calc(var(--uib-a) + var(--uib-b) * 5);
}

@keyframes orbit {
    0% {
        transform: translateX(calc(var(--uib-size) * 0.25)) scale(0.73684);
        opacity: 0.65;
    }

    5% {
        transform: translateX(calc(var(--uib-size) * 0.235)) scale(0.684208);
        opacity: 0.58;
    }

    10% {
        transform: translateX(calc(var(--uib-size) * 0.182)) scale(0.631576);
        opacity: 0.51;
    }

    15% {
        transform: translateX(calc(var(--uib-size) * 0.129)) scale(0.578944);
        opacity: 0.44;
    }

    20% {
        transform: translateX(calc(var(--uib-size) * 0.076)) scale(0.526312);
        opacity: 0.37;
    }

    25% {
        transform: translateX(0%) scale(0.47368);
        opacity: 0.3;
    }

    30% {
        transform: translateX(calc(var(--uib-size) * -0.076)) scale(0.526312);
        opacity: 0.37;
    }

    35% {
        transform: translateX(calc(var(--uib-size) * -0.129)) scale(0.578944);
        opacity: 0.44;
    }

    40% {
        transform: translateX(calc(var(--uib-size) * -0.182)) scale(0.631576);
        opacity: 0.51;
    }

    45% {
        transform: translateX(calc(var(--uib-size) * -0.235)) scale(0.684208);
        opacity: 0.58;
    }

    50% {
        transform: translateX(calc(var(--uib-size) * -0.25)) scale(0.73684);
        opacity: 0.65;
    }

    55% {
        transform: translateX(calc(var(--uib-size) * -0.235)) scale(0.789472);
        opacity: 0.72;
    }

    60% {
        transform: translateX(calc(var(--uib-size) * -0.182)) scale(0.842104);
        opacity: 0.79;
    }

    65% {
        transform: translateX(calc(var(--uib-size) * -0.129)) scale(0.894736);
        opacity: 0.86;
    }

    70% {
        transform: translateX(calc(var(--uib-size) * -0.076)) scale(0.947368);
        opacity: 0.93;
    }

    75% {
        transform: translateX(0%) scale(1);
        opacity: 1;
    }

    80% {
        transform: translateX(calc(var(--uib-size) * 0.076)) scale(0.947368);
        opacity: 0.93;
    }

    85% {
        transform: translateX(calc(var(--uib-size) * 0.129)) scale(0.894736);
        opacity: 0.86;
    }

    90% {
        transform: translateX(calc(var(--uib-size) * 0.182)) scale(0.842104);
        opacity: 0.79;
    }

    95% {
        transform: translateX(calc(var(--uib-size) * 0.235)) scale(0.789472);
        opacity: 0.72;
    }

    100% {
        transform: translateX(calc(var(--uib-size) * 0.25)) scale(0.73684);
        opacity: 0.65;
    }
}