<!-- html结构 -->
<body>
    <div class="btn-list">
        <div class="btn twinkle">开始</div>
        <div class="btn slide">开始</div>
        <div class="btn ball">
            <span>开始</span>
            <div class="dot"></div>
        </div>
        <div class="btn boom">开始</div>
        <div class="btn circle">开始</div>
        <div class="btn three-d">开始</div>
    </div>
</body>
/* 按钮btn 基础样式 */
body {
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #bdc3c7;
}

.btn-list {
    display: grid;
    grid-template-columns: repeat(3,200px);
    gap: 50px;
    background: #fff;
    border-radius: 20px;
    padding: 50px;
    box-shadow: 0 0 5px 5px rgb(0 0 0 / 8%);
}

.btn {
    width: 200px;
    height: 80px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 2rem;
    cursor: pointer;
    user-select: none;
    letter-spacing: 1rem;
    text-indent: 1rem;
    border-radius: 20px;
    box-sizing: border-box;
}

.twinkle {
    overflow: hidden;
    position: relative;
    border: 2px solid #2c3e50;
    color: #2c3e50;
    transition: background-color .2s;
}

.twinkle::before {
    content: "";
    position: absolute;
    width: 50px;
    height: 200%;
    background-color: rgba(255, 255, 255, .6);
    transform: skew(45deg) translate3d(-200px,0,0);
}

.twinkle:hover {
    background-color: #2c3e50;
}

.twinkle:hover::before {
    transition: ease-in-out .5s;
    transform: skew(45deg) translate3d(300px,0,0);
}

.slide {
    border: 2px solid #2980b9;
    color: #2980b9;
    position: relative;
    overflow: hidden;
    z-index: 1;
    transition: .5s;
}

.slide::before {
    content: "";
    position: absolute;
    z-index: -1;
    width: 0;
    height: 100%;
    left: 0;
    background-color: #2980b9;
    transition: ease-in-out .5s;
}

.slide:hover::before {
    width: 100%;
}

.ball {
    border: 2px solid #8e44ad;
    color: #8e44ad;
    position: relative;
}

.dot {
    position: absolute;
    left: 0;
    top: 0;
    width: 60px;
    height: 100%;
    border-radius: 20px;
    background-color: #bdc3c7;
    transition: all .3s ease;
    display: none;
}

.dot::before {
    content: "";
    position: absolute;
    top: -11px;
    width: 10px;
    height: 10px;
    background-color: #8e44ad;
    border-radius: 50%;
    border: 4px solid #8e44ad;
    box-shadow: 0 0 10px 0 #8e44ad;
}

.ball:hover {
    color: #8e44ad;
}

.ball:hover .dot {
    animation: move 2s infinite linear;
    display: block;
}

@keyframes move {
    0% {
        transform: translateX(0) rotate(0);
    }
    30% {
        transform: translateX(calc(200px - 60px)) rotate(0);
    }
    50% {
        transform: translateX(calc(200px - 60px)) rotate(180deg);
    }
    80% {
        transform: translateX(0) rotate(180deg);
    }
    100% {
        transform: translateX(0) rotate(360deg);
    }
}

.boom {
    background-color: #16a085;
    color: #fff;
    position: relative;
    z-index: 1;
}

.boom::before {
    content: "";
    position: absolute;
    z-index: -1;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    border: 2px solid #16a085;
    border-radius: 20px;
    transform-origin: center;
}

.boom:hover::before {
    transform: scale(1.25);
    transition: all ease-out .5s;
    border: 1px solid #96f3e0;
    opacity: 0;
}

.circle {
    background-color: #e74c3c;
    color: #fff;
    position: relative;
    z-index: 1;
    overflow: hidden;
}

.circle::before {
    content: "";
    position: absolute;
    z-index: -1;
    top: 50%;
    left: 50%;
    width: 1rem;
    height: 1rem;
    transform: translate3d(-50%,-50%,0) scale(0,0);
    border-radius: 50%;
    background-color: #c0392b;
    transform-origin: center;
    transition: ease-in-out .5s;
}

.circle:hover::before {
    transform: translate3d(-50%,-50%,0) scale(15,15);
}

.three-d {
    color: #fff;
    background-color: #f1c40f;
    text-shadow: -2px 2px 2px rgb(209 132 0),
                -2px 2px 2px rgb(209 132 0),
                -2px 2px 2px rgb(209 132 0),
                -2px 2px 2px rgb(209 132 0),
                -2px 2px 2px rgb(209 132 0),
                -2px 2px 2px rgb(209 132 0);
    box-shadow: 0px 15px 0px 0px #f39c12;
    transition: all .5s;
}

.three-d:hover {
    background-color: #fcdc5e;
}

.three-d:active {
    transform: translate(0,4px);
    box-shadow: 0px 1px 0px 0px #f39c12;
}
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