404页面设计

            
            @import url('https://fonts.googleapis.cn/css?family=Lato|Russo+One');

*,
*:after,
*:before {
    box-sizing: border-box;
}

body {
    padding: 0;
    margin: 0;
}

.container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    overflow: hidden;
}

//stars
.container-star {
    background-image: linear-gradient(to bottom,
            #292256 0%,
            #8446cf 70%,
            #a871d6 100%);

    &:after {
        background: radial-gradient(ellipse at center,
                rgba(255, 255, 255, 0) 0%,
                rgba(255, 255, 255, 0) 40%,
                rgba(15, 10, 38, 0.2) 100%);
        content: "";
        width: 100%;
        height: 100%;
        position: absolute;
        top: 0;
    }
}

.star-1 {
    position: absolute;
    border-radius: 50%;
    background-color: #ffffff;
    animation: twinkle 5s infinite ease-in-out;

    &:after {
        height: 100%;
        width: 100%;
        transform: rotate(90deg);
        content: "";
        position: absolute;
        background-color: #fff;
        border-radius: 50%;
    }

    &:before {
        background: radial-gradient(ellipse at center,
                rgba(255, 255, 255, 0.5) 0%,
                rgba(255, 255, 255, 0) 60%,
                rgba(255, 255, 255, 0) 100%);
        position: absolute;
        border-radius: 50%;
        content: "";
        top: -20%;
        left: -50%;
    }
}

@for $i from 1 through (30) {
    $top: random(100)+vh;
    $left: random(100)+vw;
    $size: random(6) + 3px;

    .star-1:nth-of-type(#{$i}) {
        top: $top;
        left: $left;
        width: $size;
        height: calc($size/3);
        animation-delay: random(5) + s;

        &:before {
            width: $size *2;
            height: $size *2;
            top: -250%;
        }
    }
}

.star-2 {
    position: absolute;
    border-radius: 50%;
    background-color: #ffffff;
    animation: twinkle 5s infinite ease-in-out;
}

@for $i from 31 through (60) {
    $top: random(100)+vh;
    $left: random(100)+vw;
    $size: random(3) + 1px;

    .star-2:nth-of-type(#{$i}) {
        top: $top;
        left: $left;
        width: $size;
        height: $size;
        animation-delay: random(5) + s;

        &:before {
            width: $size *2;
            height: $size *2;
            top: -250%;
        }
    }
}

//text and moon
.container-title {
    width: 600px;
    height: 450px;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    position: absolute;
    color: white;
    line-height: 1;
    font-weight: 700;
    text-align: center;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    display: flex;
}

.title>* {
    display: inline-block;
    font-size: 200px;
}

.number {
    text-shadow: 20px 20px 20px rgba(0, 0, 0, 0.2);
    padding: 0 0.2em;
    font-family: 'Russo One', sans-serif;
}

.subtitle {
    font-size: 25px;
    margin-top: 1.5em;
    font-family: "Lato", sans-serif;
    text-shadow: 4px 4px 4px rgba(0, 0, 0, 0.2);
}

button {
    font-size: 22px;
    margin-top: 1.5em;
    padding: 0.5em 1em;
    letter-spacing: 1px;
    font-family: "Lato", sans-serif;
    color: white;
    background-color: transparent;
    border: 0;
    cursor: pointer;
    z-index: 999;
    border: 2px solid white;
    border-radius: 5px;
    text-shadow: 4px 4px 4px rgba(0, 0, 0, 0.2);
    transition: opacity 0.2s ease;

    &:hover {
        opacity: 0.7;
    }

    &:focus {
        outline: 0;
    }
}

.moon {
    position: relative;
    border-radius: 50%;
    width: 160px;
    height: 160px;
    z-index: 2;
    background-color: #fff;
    box-shadow: 0 0 10px #fff, 0 0 20px #fff, 0 0 30px #fff, 0 0 40px #fff,
        0 0 70px #fff, 0 0 80px #fff, 0 0 100px #ff1177;
    animation: rotate 5s ease-in-out infinite;

    .face {
        top: 60%;
        left: 47%;
        position: absolute;

        .mouth {
            border-top-left-radius: 50%;
            border-bottom-right-radius: 50%;
            border-top-right-radius: 50%;
            background-color: #5c3191;
            width: 25px;
            height: 25px;
            position: absolute;
            animation: snore 5s ease-in-out infinite;
            transform: rotate(45deg);
            box-shadow: inset -4px -4px 4px rgba(0, 0, 0, 0.3);
        }

        .eyes {
            position: absolute;
            top: -30px;
            left: -30px;

            .eye-left,
            .eye-right {
                border: 4px solid #5c3191;
                width: 30px;
                height: 15px;
                border-bottom-left-radius: 100px;
                border-bottom-right-radius: 100px;
                border-top: 0;
                position: absolute;

                &:before,
                &:after {
                    content: "";
                    position: absolute;
                    border-radius: 50%;
                    width: 4px;
                    height: 4px;
                    background-color: #5c3191;
                    top: -2px;
                    left: -4px;
                }

                &:after {
                    left: auto;
                    right: -4px;
                }
            }

            .eye-right {
                left: 50px;
            }
        }
    }
}

//birds
.container-bird {
    perspective: 2000px;
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
}

.bird {
    position: absolute;
    z-index: 1000;
    left: 50%;
    top: 50%;
    height: 40px;
    width: 50px;
    transform: translate3d(-100vw, 0, 0) rotateY(90deg);
    transform-style: preserve-3d;

}

.bird-container {
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    transform-style: preserve-3d;
    transform: translate3d(50px, 30px, -300px);
}

.wing {
    position: absolute;
    left: 0;
    top: 0;
    right: 0;
    bottom: 0;
    border-radius: 3px;
    transform-style: preserve-3d;
    transform-origin: center bottom;
    z-index: 300;
}

.wing-left {
    background: linear-gradient(to bottom, #a58dc4 0%, #7979a8 100%);
    transform: translate3d(0, 0, 0) rotateX(-30deg);
    animation: wingLeft 1.3s cubic-bezier(0.45, 0, 0.50, 0.95) infinite;
}

.wing-right {
    background: linear-gradient(to bottom, #d9d3e2 0%, #b8a5d1 100%);
    transform: translate3d(0, 0, 0) rotateX(-30deg);
    animation: wingRight 1.3s cubic-bezier(0.45, 0, 0.50, 0.95) infinite;
}

.wing-right-top,
.wing-left-top {
    border-right: 25px solid transparent;
    border-left: 25px solid transparent;
    top: -20px;
    width: 100%;
    position: absolute;
    transform-origin: 100% 100%;
}

.wing-right-top {
    border-bottom: 20px solid #b8a5d1;
    transform: translate3d(0, 0, 0) rotateX(60deg);
    animation: wingRightTop 1.3s cubic-bezier(0.45, 0, 0.50, 0.95) infinite;
}

.wing-left-top {
    border-bottom: 20px solid #7979a8;
    transform: translate3d(0, 0, 0) rotateX(-60deg);
    animation: wingLeftTop 1.3s cubic-bezier(0.45, 0, 0.50, 0.95) infinite;
}

.bird-anim:nth-child(1) {
    animation: bird1 30s linear infinite forwards;
}

.bird-anim:nth-child(2) {
    animation: bird2 30s linear infinite forwards;
    animation-delay: 3s;
    z-index: -1;
}

.bird-anim:nth-child(3) {
    animation: bird3 30s linear infinite forwards;
    animation-delay: 5s;
}

.bird-anim:nth-child(4) {
    animation: bird4 30s linear infinite forwards;
    animation-delay: 7s;
}

.bird-anim:nth-child(5) {
    animation: bird5 30s linear infinite forwards;
    animation-delay: 14s;
}

.bird-anim:nth-child(6) {
    animation: bird6 30s linear infinite forwards;
    animation-delay: 10s;
    z-index: -1;
}

//keyframes
@keyframes rotate {

    0%,
    100% {
        transform: rotate(-8deg);
    }

    50% {
        transform: rotate(0deg);
    }
}

@keyframes snore {

    0%,
    100% {
        transform: scale(1) rotate(30deg);
    }

    50% {
        transform: scale(0.5) rotate(30deg);
        border-bottom-left-radius: 50%;
    }
}

@keyframes twinkle {

    0%,
    100% {
        opacity: 0.7;
    }

    50% {
        opacity: 0.3;
    }
}

@keyframes wingLeft {

    0%,
    100% {
        transform: translate3d(0, 0, 0) rotateX(-50deg);
    }

    50% {
        transform: translate3d(0, -20px, 0) rotateX(-130deg);
        background: linear-gradient(to bottom, #d9d3e2 0%, #b8a5d1 100%);
    }
}

@keyframes wingLeftTop {

    0%,
    100% {
        transform: translate3d(0, 0, 0) rotateX(-10deg);
    }

    50% {
        transform: translate3d(0px, 0px, 0) rotateX(-40deg);
        border-bottom: 20px solid #b8a5d1;
    }
}

@keyframes wingRight {

    0%,
    100% {
        transform: translate3d(0, 0, 0) rotateX(50deg);
    }

    50% {
        transform: translate3d(0, -20px, 0) rotateX(130deg);
        background: linear-gradient(to bottom, #a58dc4 0%, #7979a8 100%);
    }
}

@keyframes wingRightTop {

    0%,
    100% {
        transform: translate3d(0, 0, 0) rotateX(10deg);
    }

    50% {
        transform: translate3d(0px, 0px, 0px) rotateX(40deg);
        border-bottom: 20px solid #7979a8;
    }
}

@keyframes bird1 {
    0% {
        transform: translate3d(-120vw, -20px, -1000px) rotateY(-40deg) rotateX(0deg);
    }

    100% {
        transform: translate3d(100vw, -40vh, 1000px) rotateY(-40deg) rotateX(0deg);
    }
}

@keyframes bird2 {

    0%,
    15% {
        transform: translate3d(100vw, -300px, -1000px) rotateY(10deg) rotateX(0deg);
    }

    100% {
        transform: translate3d(-100vw, -20px, -1000px) rotateY(10deg) rotateX(0deg);
    }
}

@keyframes bird3 {
    0% {
        transform: translate3d(100vw, -50vh, 100px) rotateY(-5deg) rotateX(-20deg);
    }

    100% {
        transform: translate3d(-100vw, -10vh, 100px) rotateY(-5deg) rotateX(-20deg);
    }
}

@keyframes bird4 {
    0% {
        transform: translate3d(100vw, 30vh, 200px) rotateY(-5deg) rotateX(10deg);
    }

    100% {
        transform: translate3d(-100vw, -30vh, 200px) rotateY(-5deg) rotateX(10deg);
    }
}

@keyframes bird5 {

    0%,
    5% {
        transform: translate3d(100vw, 30vh, 400px) rotateY(-15deg) rotateX(-10deg);
    }

    100% {
        transform: translate3d(-100vw, 10vh, 400px) rotateY(-15deg) rotateX(-10deg);
    }
}

@keyframes bird6 {

    0%,
    10% {
        transform: translate3d(-100vw, 20vh, -500px) rotateY(15deg) rotateX(10deg)
    }

    100% {
        transform: translate3d(100vw, 40vh, -800px) rotateY(5deg) rotateX(10deg)
    }
}

@media screen and (max-width: 580px) {
    .container-404 {
        width: 100%;
    }

    .number {
        font-size: 100px;
    }

    .subtitle {
        font-size: 20px;
        padding: 0 1em;
    }

    .moon {
        width: 100px;
        height: 100px;
    }

    .face {
        transform: scale(0.7)
    }
}