巧妙利用了transform将两个伪元素平移到相应位置产生叠加错觉。

meet

.meet {    position: relative;    width: 200px;    height: 200px;    background-color: #f66;    transform: rotate(45deg);    &::before,    &::after {        position: absolute;        left: 0;        top: 0;        border-radius: 100%;        width: 100%;        height: 100%;        background-color: #f66;        content: "";    }    &::before {        transform: translateX(-100px);    }    &::after {        transform: translateY(-100px);    }}

meet

Love You

当你真的爱上心仪妹纸时，心里就会产生爱的荷尔蒙，慢慢布满曾经受伤而变得有棱角的心(前提是你曾经受过伤害，不然心也是圆圆的)。

使用clip-path的polygon()裁剪出一个棱角心形，实质上是一个多边形。

.love {    width: 300px;    height: 300px;    background-image: linear-gradient(to bottom, #f66, #66f);    clip-path: polygon(25% 0, 50% 20%, 75% 0, 100% 20%, 100% 60%, 50% 95%, 0 60%, 0 20%);}

love

Miss You

当你和心仪妹纸在一起后都日想夜念，恨不得每天都腻在一起，心情就像过山车那样随时带着惊喜。

前段时间看到「陈大鱼头兄」的心形加载条，觉得挺漂亮的，很带感觉。

miss

通过动图分析，发现每条线条的背景色和动画时延不一致，另外动画运行时的高度也不一致。细心的你可能还会发现，第1条和第9条的高度一致，第2条和第8条的高度一致，以此类推，得到高度变换相同类的公式：对称index = 总数 + 1 - index。

背景色使用了滤镜的色相旋转hue-rotate()，目的是为了让颜色过渡得更自然。

.miss {    display: flex;    justify-content: center;    align-items: center;    width: 200px;    height: 200px;    ul {        display: flex;        justify-content: space-between;        width: 150px;        height: 10px;    }    li {        --Θ: calc(var(--line-index) / var(--line-count) * .5turn);        --time: calc((var(--line-index) - 1) * 40ms);        border-radius: 5px;        width: 10px;        height: 10px;        background-color: #3c9;        filter: hue-rotate(var(--Θ));        animation-duration: 1s;        animation-delay: var(--time);        animation-iteration-count: infinite;        &.line-1,        &.line-9 {            animation-name: beat-1;        }        &.line-2,        &.line-8 {            animation-name: beat-2;        }        &.line-3,        &.line-7 {            animation-name: beat-3;        }        &.line-4,        &.line-6 {            animation-name: beat-4;        }        &.line-5 {            animation-name: beat-5;        }    }}@keyframes beat-1 {    0%,    10%,    90%,    100% {        height: 10px;    }    45%,    55% {        height: 30px;        transform: translate3d(0, -15px, 0);    }}@keyframes beat-2 {    0%,    10%,    90%,    100% {        height: 10px;    }    45%,    55% {        height: 60px;        transform: translate3d(0, -30px, 0);    }}@keyframes beat-3 {    0%,    10%,    90%,    100% {        height: 10px;    }    45%,    55% {        height: 80px;        transform: translate3d(0, -40px, 0);    }}@keyframes beat-4 {    0%,    10%,    90%,    100% {        height: 10px;    }    45%,    55% {        height: 90px;        transform: translate3d(0, -30px, 0);    }}@keyframes beat-5 {    0%,    10%,    90%,    100% {        height: 10px;    }    45%,    55% {        height: 90px;        transform: translate3d(0, -20px, 0);    }}

一波操作后就有了以下效果。和陈大鱼头兄的心形加载条相比，颜色、波动曲线和跳动频率有点不一样，在暖色调的蔓延和肾上腺素的飙升下，这是一种心动的感觉。对着你心仪妹纸说：I Miss You。

miss

CSS变量怎样玩，可回顾笔者曾经的文章《妙用CSS变量，让你的CSS变得更心动》。

Marry You

当你娶到心仪妹纸后，在你眼里整个世界都是她。也许，你会感激曾经在某一天某一刻某一地遇上那个对的她。写到最后，送给各位同学一个大大的彩蛋，一个暖心彩虹色调搭配的爱心点赞按钮。

marry

$heart-color: #f66;$easing: cubic-bezier(.7, 0, .3, 1);$duration: 500ms;.marry {    position: relative;    z-index: 1;    border: none;    border-radius: 100%;    width: 1em;    height: 1em;    appearance: none;    background-color: #fff;    cursor: pointer;    font-size: 200px;    transition: all $duration $easing;    &::before {        position: absolute;        left: 0;        top: 0;        z-index: -1;        border-radius: inherit;        width: 100%;        height: 100%;        box-shadow: 0 .3em .6em rgba(#000, .3);        content: "";        transition: inherit;    }    &::after {        position: absolute;        left: 0;        top: 0;        z-index: -1;        border-radius: inherit;        width: 100%;        height: 100%;        background-color: #fff;        content: "";    }    &:active {        &::before {            animation: depress-shadow $duration $easing both;        }    }    &:focus::after {        animation: depress $duration $easing both;    }}.like-wrapper {    display: grid;    justify-content: center;    align-items: center;    > * {        grid-area: 1/1;        margin: auto;    }}.like-ripple {    overflow: hidden;    position: relative;    border-radius: 100%;    width: 1em;    height: 1em;    &::before {        position: absolute;        left: 0;        top: 0;        border: .4em solid $heart-color;        border-radius: inherit;        width: 100%;        height: 100%;        content: "";        transform: scale(0);    }    .marry:focus & {        &::before {            animation: ripple-out $duration $easing;        }    }}.like-heart {    display: block;    width: .5em;    height: .5em;    transform-origin: center 80%;    path {        transition: all $duration $easing;        stroke: $heart-color;        stroke-width: 2;        fill: transparent;        .marry:focus & {            fill: $heart-color;        }    }    .marry:focus & {        animation: heart-bounce $duration $easing;    }}.like-particle {    position: relative;    width: 1px;    height: 1px;}.like-particle-item {    --Θ: calc(var(--line-index) / var(--line-count) * 1turn);    $color-list: #f66 #66f #f90 #09f #9c3 #3c9;    position: absolute;    left: 0;    top: 0;    border-radius: .05em;    width: .1em;    height: .1em;    transform: translate(-50%, -50%) rotate(var(--Θ)) translateY(0) scaleY(0);    transition: all $duration $easing;    @each $v in $color-list {        $index: index($color-list, $v);        &:nth-child(#{$index}) {            background-color: $v;        }    }    .marry:focus & {        animation: particle-out calc(#{$duration} * 1.2) $easing forwards;    }}.marry:focus {    cursor: normal;    pointer-events: none;}@keyframes depress {    0%,    100% {        transform: none;    }    50% {        transform: translateY(5%) scale(.9);    }}@keyframes depress-shadow {    0%,    100% {        transform: none;    }    50% {        transform: scale(.5);    }}@keyframes heart-bounce {    0%,    80%,    100% {        transform: scale(1);    }    40% {        transform: scale(.7);    }}@keyframes particle-out {    50% {        height: .3em;    }    50%,    60% {        height: .3em;        transform: translate(-50%, -50%) rotate(var(--Θ)) translateY(.8em) scale(1);    }    60% {        height: .2em;    }    100% {        transform: translate(-50%, -50%) rotate(var(--Θ)) translateY(1em) scale(0);    }}@keyframes ripple-out {    from {        transform: scale(0);    }    to {        transform: scale(5);    }}

七夕快乐

最后，祝天下有情人终成眷属，也祝未脱单的兄弟们在未来会遇到那个对的她，也恳请单身姑娘们多给一些机会追你的男生，相信也能找到一个疼爱你一辈子的男生。

作者：JowayYoung

转发链接：https://mp.weixin.qq.com/s/pGAVZYvm3YGqnsJuc41shw