body {
    background-image: url('https://static.runoob.com/images/mix/paper.gif');
    background-color: #cccccc;
}

.blue {
    color: rgb(8, 69, 235);
    text-indent: 30px;
}

.box {
    background-image: url('https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fimg.zcool.cn%2Fcommunity%2F0186cd5ac42c71a8012062e3f8d763.png%401280w_1l_2o_100sh.png&refer=http%3A%2F%2Fimg.zcool.cn&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=auto?sec=1651544785&t=197a98c7757f0c75590eb41f1b4cdbd6');
}

.words_box {
    background-image: url('https://img0.baidu.com/it/u=255820472,3712711141&fm=253&fmt=auto&app=138&f=GIF?w=1000&h=200');
}

.mouse {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    ;
    position: fixed;
    left: -200px;
    z-index: 1000;
    pointer-events: none;
}

.kuang {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -10;
    background-image: linear-gradient(180deg, rgb(78, 168, 241), rgb(37, 91, 241));
}

.bubble {
    position: absolute;
    border-radius: 50%;
    border: 2px solid #fff;
    box-shadow: inset 0 0 8px #fff;
    animation: flutter 10s infinite;
    opacity: 0;
}

@keyframes flutter {
    0% {
        transform: translateX(0);
        bottom: -100px;
        opacity: 1;
    }
    50% {
        transform: translateX(100px);
        opacity: 0.5;
    }
    100% {
        transform: translateX(0px);
        bottom: 100%;
        opacity: 0;
    }
}

.bubble:nth-child(1) {
    left: -10%;
    width: 50px;
    height: 50px;
    animation-duration: 9s;
    animation-delay: 0.1s;
}

.bubble:nth-child(2) {
    left: 15%;
    width: 20px;
    height: 20px;
    animation-duration: 6s;
    animation-delay: 1.5s;
}

.bubble:nth-child(3) {
    left: 20%;
    width: 60px;
    height: 60px;
    animation-duration: 10s;
}

.bubble:nth-child(4) {
    left: 30%;
    width: 30px;
    height: 30px;
    animation-duration: 5.5s;
    animation-delay: 1.5s;
}

.bubble:nth-child(5) {
    left: 40%;
    width: 50px;
    height: 50px;
    animation-duration: 12s;
}

.bubble:nth-child(6) {
    left: 50%;
    width: 20px;
    height: 20px;
    animation-duration: 6s;
    animation-delay: 1s;
}

.bubble:nth-child(7) {
    left: 60%;
    width: 40px;
    height: 40px;
    animation-duration: 8s;
    animation-delay: 1s;
}

.bubble:nth-child(8) {
    left: 65%;
    width: 60px;
    height: 60px;
    animation-duration: 15s;
}

.bubble:nth-child(9) {
    left: 80%;
    width: 55px;
    height: 55px;
    animation-duration: 9s;
    animation-delay: 0.5s;
}

.bubble:nth-child(10) {
    left: 100%;
    width: 40px;
    height: 40px;
    animation-duration: 12s;
}


/* 流光文 */

* {
    font-family: 'Merienda', cursive;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    height: 100vh;
    background-color: rgb(0, 0, 0);
    display: flex;
    justify-content: center;
    align-items: center;
}

main {
    position: relative;
    overflow: hidden;
}


/* .txt {
    color: rgb(255, 255, 255);
    text-transform: uppercase;
    background-color: rgb(0, 0, 0);
    user-select: none;
}

.txt::before {
    content: "来首";
    position: absolute;
    text-shadow: 0 0 10px rgb(255, 255, 255), 0 0 10px rgb(255, 255, 255), 0 0 10px rgb(255, 255, 255);
    filter: blur(3px);
    mix-blend-mode: difference;
}

.txt2 {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, rgb(255, 0, 212), rgb(0, 119, 255), rgb(255, 187, 0), rgb(1, 255, 77));
    mix-blend-mode: multiply;
} */

.txt3 {
    position: absolute;
    top: -100%;
    left: -100%;
    right: 0;
    bottom: 0;
    background-image: radial-gradient(circle, white, black 30%);
    background-size: 25% 25%;
    mix-blend-mode: color-dodge;
    animation: shine 3s linear infinite;
}

@keyframes shine {
    100% {
        transform: translate(50%, 50%);
    }
}


/* 流光文 */

body {
    background-size: cover;
    /*保持图像的纵横比并将图像完全覆盖父容器*/
    overflow: hidden;
    /*内容溢出就隐藏*/
}