svg+css实现信封邮件鼠标悬停翻转打开信件圣诞节快乐祝福效果代码-html代码-BFW代码库

代码语言：html

所属分类：悬停

代码描述：svg+css实现信封邮件鼠标悬停翻转打开信件圣诞节快乐祝福效果代码

下面为部分代码预览，完整代码请点击下载或在bfwstudio webide中打开

<!DOCTYPE html>
<html lang="en" >

<head>
  <meta charset="UTF-8">
  
  
  
<style>
@import url(https://fonts.bunny.net/css?family=nothing-you-could-do:400);

*,
::before,
::after {
        box-sizing: border-box;
}
body {
        font-family: "Nothing You Could Do", handwriting;

        background: radial-gradient(#005f8f, #001f3f, black);
        color: #4a4a4a;
        display: flex;
        justify-content: center;
        align-items: center;
        min-height: 100vh;
        padding: 1rem;
}

.envelope {
        --duration: 1000ms;

        --shadow-width: calc(var(--envelope-width) * 0.85);
        --shadow-blur: 15px;

        --envelope-width: 300px;
        --envelope-height: 175px;
        --envelope-clr-bg: #d14d44;
        --envelope-clr-bg-side: #c24e46;
        --envelope-clr-bg-bottom: #e15349;
        --envelope-clr-bg-top: #d14d44;
        --envelope-clr-txt: #fff;

        /*--envelope-transform: rotateY(0deg);*/
        --envelope-transform-hover: rotateY(180deg);
        --evelope-rotate-delay: calc(var(--duration) / 1);
        --evelope-rotate-delay-hover: 0ms;

        --letter-clr-bg: #fff;
        --letter-clr-text: green;
        --letter-font-size: 1rem;
        --letter-delay: 0ms;
        --letter-delay-hover: calc(
                var(--duration) * 1.25
        ); /* delay before revealing card */

        --letter-height: calc(var(--envelope-height) - 2rem);
        --letter-height-hover: calc(var(--envelope-height) * 1.75);

        --fold-rotate: rotateX(0deg);
        /*--fold-zindex: 10;*/
        --fold-zindex-hover: 0;
        --fold-rotate-hover: rotateX(180deg);
        --fold-delay: calc(var(--duration) / 2); /* delay before opening top section */
        --fold-delay-hover: calc(var(--duration) * .75);

        --front-font-size: 1rem;
        --snowman-width: 50px;
        --bells-width: 30px;

        position: relative;
        height: var(--envelope-height);
        width: var(--envelope-width);
        perspective: 1000px;
        cursor: pointer;
}

@media (min-width: 720px) {
        .envelope {
                --envelope-width: 600px;
                --envelope-height: 350px;
                --letter-font-size: 1.6rem;
                --snowman-width: 130px;
                --bells-width: 60px;
                --front-font-size: 1.25rem;
        }
}
/* shadow */
.envelope::after {
        content: "";
        position: absolute;
        top: 110%;
        left: 50%;
        width: var(--shadow-width);
        height: 40px;
        transition: var(--duration) ease-in-out;
        transition-delay: var(--evelope-rotate-delay);
        transform: var(--shadow-transform);
        translate: -50% 0;
        border-radius: 50%;
        background: rgba(56, 6, 6, 0.4);
        filter: blur(var(--shadow-blur));
}

.envelope:hover {
        --envelope-transform: var(--envelope-transform-hover, 0deg);
        --evelope-rotate-delay: var(--evelope-rotate-delay-hover);
        --shadow-transform: rotateY(180deg);
        --fold-rotate: var(--fold-rotate-hover);
        --fold-delay: var(--fold-delay-hover);
        --fold-zindex: var(--fold-zindex-hover);
        --letter-height: var(--letter-height-hover);
        --letter-delay: var(--letter-delay-hover);
}

.envelope-inner {
        position: relative;
        width: 100%;
        height: 100%;

        transition: var(--duration) ease-in-out;
        transition-delay: var(--evelope-rotate-delay);
        transform-style: preserve-3d;
        transform: var(--envelope-transform);
        display: grid;
}

.envelope-front,
.envelope-back {
        position: relative;
        grid-area: 1/1;
        width: 100%;
        height: 100%;
        background-color: var(--envelope-clr-bg);
        -webkit-backface-visibility: hidden;
        backface-visibility: hidden;
        perspective: 1000px;
        isolation: isolate;
}

.envelope-front {
        color: var(--envelope-clr-txt);
        display: grid;
        place-content: center;
}
.envelope-front .postage-stamp {
        position: absolute;
        top: 1em;
        right: 0.5em;
        width: 15%;
}
.envelope-front .address {
        text-align: left;
        font-size: var(--front-font-size);
}
.envelope-front .address > p > span:first-child {
        font-family: system-ui;
        font-weight: 200;
}
.envelope-front .address > p > span:last-of-type {
        font-weight: 800;
}

.envelope-back {
        /* start with back rotated*/
        transform: rotateY(180deg);
}
/* back folds */
.envelope-back::after {
        content: "";
        position: absolute;
        inset: 0;
        z-index: 3;
        background-image: conic-gradient(
                transparent 60deg,
                var(--envelope-clr-bg-side) 60deg 120deg,
                var(--envelope-clr-bg-bottom) 120deg 240deg,
                var(--envelope-clr-bg-side) 240deg 300deg,
                transparent 300deg
        );
}
/* top fold which folds up on hover */
.envelope-back .top-fold {
        position: absolute;
        inset: 0;
        z-index: var(--fold-zindex, 10);
        background-color: var(--envelope-clr-bg-top);
        clip-path: polygon(0% 0%, 50% 55%, 100% 0%);

        transform: var(--fold-rotate);
        transform-origin: top;
        transition: var(--duration) ease-in-out;
        transition-delay: var(--fold-delay);
}

.letter {
        position: absolute;
        bottom: 5px;
        left: 50%;
        width: 90%;
        height: var(--letter-height);
        font-size: var(--letter-font-size);
        transform: translateX(-50%);
        background: var(--letter-clr-bg);
        z-index: 2;
        padding: 2em 3em;
        display: flex;
        flex-direction: column;
        gap: 1rem;
        align-items: center;
        text-align: center;
        transition: var(--duration) ease-in-out;
        transition-delay: var(--letter-delay);
        overflow: hidden;
}
.letter > svg.snowman {
        width: var(--snowman-width);
}
.letter svg.bells {
        width: var(--bells-width);
        color: orange;
}
.letter p {
        margin: 0;
        font-weight: bold;
        width: 32ch;
        color: var(--letter-clr-text);
}
</style>


  
  
</head>

<body translate="no">
  <div class="envelope">

        <div class="envelope-inner">

                <div class="envelope-front">

                        <div class="postage-stamp ">
                                <svg fill="currentColor" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 300 300" xml:space="preserve">
                                        <path d="M253.98,257.652c0-8.568,8.568-17.748,17.136-18.361c-1.224-4.895-1.224-10.402-0.611-15.299 c-3.061,0.611-7.345,0-10.404-1.225c-6.12-3.061-9.792-9.18-9.792-15.912c0-9.18,7.956-20.807,17.136-21.42 c0-2.447,0.612-4.896,0.612-7.344s0.612-4.896,0.612-7.344c-7.956,3.061-17.137-4.283-18.973-12.24 c-1.836-9.792,4.284-17.748,12.853-21.42c-0.612-1.836-0.612-4.284-0.612-6.12c0-3.672,0-7.344,0.612-11.016 c-3.061,0-6.12-1.224-9.181-3.06c-4.283-3.06-6.731-7.344-7.344-12.24c0-0.612,0-1.836,0-2.448c0-9.792,8.568-15.3,17.136-16.524 c-0.611-3.672,0-7.956,0-11.628c0-3.06,0-6.12,0.612-9.18c-7.956,2.448-18.36-4.284-20.808-12.24 c-2.448-7.956,1.836-17.748,9.792-20.808c-1.225-3.06-.........完整代码请登录后点击上方下载按钮下载查看