素雅的登录界面，简单而优雅
先上效果图：
再上代码：
<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><title>Title</title><style>*, *::after, *::before {margin: 0;padding: 0;box-sizing: border-box;user-select: none;}/* Generic */body {width: 100%;height: 100vh;display: flex;justify-content: center;align-items: center;font-family: "Montserrat", sans-serif;font-size: 12px;background-color: #ecf0f3;color: #a0a5a8;}/**/.main {position: relative;width: 1000px;min-width: 1000px;min-height: 600px;height: 600px;padding: 25px;background-color: #ecf0f3;box-shadow: 10px 10px 10px #d1d9e6, -10px -10px 10px #f9f9f9;border-radius: 12px;overflow: hidden;}@media (max-width: 1200px) {.main {transform: scale(0.7);}}@media (max-width: 1000px) {.main {transform: scale(0.6);}}@media (max-width: 800px) {.main {transform: scale(0.5);}}@media (max-width: 600px) {.main {transform: scale(0.4);}}.container {display: flex;justify-content: center;align-items: center;position: absolute;top: 0;width: 600px;height: 100%;padding: 25px;background-color: #ecf0f3;transition: 1.25s;}.form {display: flex;justify-content: center;align-items: center;flex-direction: column;width: 100%;height: 100%;}.form__icon {object-fit: contain;width: 30px;margin: 0 5px;opacity: 0.5;transition: 0.15s;}.form__icon:hover {opacity: 1;transition: 0.15s;cursor: pointer;}.form__input {width: 350px;height: 40px;margin: 4px 0;padding-left: 25px;font-size: 13px;letter-spacing: 0.15px;border: none;outline: none;font-family: "Montserrat", sans-serif;background-color: #ecf0f3;transition: 0.25s ease;border-radius: 8px;box-shadow: inset 2px 2px 4px #d1d9e6, inset -2px -2px 4px #f9f9f9;}.form__input:focus {box-shadow: inset 4px 4px 4px #d1d9e6, inset -4px -4px 4px #f9f9f9;}.form__span {margin-top: 30px;margin-bottom: 12px;}.form__link {color: #181818;font-size: 15px;margin-top: 25px;border-bottom: 1px solid #a0a5a8;line-height: 2;}.title {font-size: 34px;font-weight: 700;line-height: 3;color: #181818;}.description {font-size: 14px;letter-spacing: 0.25px;text-align: center;line-height: 1.6;}.button {width: 180px;height: 50px;border-radius: 25px;margin-top: 50px;font-weight: 700;font-size: 14px;letter-spacing: 1.15px;background-color: #4B70E2;color: #f9f9f9;box-shadow: 8px 8px 16px #d1d9e6, -8px -8px 16px #f9f9f9;border: none;outline: none;}/**/.a-container {z-index: 100;left: calc(100% - 600px );}.b-container {left: calc(100% - 600px );z-index: 0;}.switch {display: flex;justify-content: center;align-items: center;position: absolute;top: 0;left: 0;height: 100%;width: 400px;padding: 50px;z-index: 200;transition: 1.25s;background-color: #ecf0f3;overflow: hidden;box-shadow: 4px 4px 10px #d1d9e6, -4px -4px 10px #f9f9f9;}.switch__circle {position: absolute;width: 500px;height: 500px;border-radius: 50%;background-color: #ecf0f3;box-shadow: inset 8px 8px 12px #d1d9e6, inset -8px -8px 12px #f9f9f9;bottom: -60%;left: -60%;transition: 1.25s;}.switch__circle--t {top: -30%;left: 60%;width: 300px;height: 300px;}.switch__container {display: flex;justify-content: center;align-items: center;flex-direction: column;position: absolute;width: 400px;padding: 50px 55px;transition: 1.25s;}.switch__button {cursor: pointer;}.switch__button:hover {box-shadow: 6px 6px 10px #d1d9e6, -6px -6px 10px #f9f9f9;transform: scale(0.985);transition: 0.25s;}.switch__button:active, .switch__button:focus {box-shadow: 2px 2px 6px #d1d9e6, -2px -2px 6px #f9f9f9;transform: scale(0.97);transition: 0.25s;}/**/.is-txr {left: calc(100% - 400px );transition: 1.25s;transform-origin: left;}.is-txl {left: 0;transition: 1.25s;transform-origin: right;}.is-z200 {z-index: 200;transition: 1.25s;}.is-hidden {visibility: hidden;opacity: 0;position: absolute;transition: 1.25s;}.is-gx {animation: is-gx 1.25s;}@keyframes is-gx {0%, 10%, 100% {width: 400px;}30%, 50% {width: 500px;}}header {top: 0;position: fixed;display: flex;align-items: center;justify-content: space-between;padding: 0 0 1% 1%;width: 100%;z-index: 3;height: 7em;font-family: "Bebas Neue", sans-serif;font-size: clamp(0.66rem, 2vw, 1rem);letter-spacing: 0.5em;}a{color: #B3B8BC;text-decoration: none;}</style>
</head>
<body>
<header><div>Animated Sections</div><div><a href="https://blog.csdn.net/qq_35241329?type=blog">Original By TiMi先生</a></div>
</header>
<div class="main"><div class="container a-container" id="a-container"><form class="form" id="a-form" method="" action=""><h2 class="form_title title">Create Account</h2><div class="form__icons"><img class="form__icon" src="data:image/svg+xml;base64,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" alt=""><img class="form__icon" src="data:image/svg+xml;base64,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"><img class="form__icon" src="data:image/svg+xml;base64,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"></div><span class="form__span">or use email for registration</span><input class="form__input" type="text" placeholder="Name"><input class="form__input" type="text" placeholder="Email"><input class="form__input" type="password" placeholder="Password"><button class="form__button button submit">SIGN UP</button></form></div><div class="container b-container" id="b-container"><form class="form" id="b-form" method="" action=""><h2 class="form_title title">Sign in to Website</h2><div class="form__icons"><img class="form__icon" 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alt=""><img class="form__icon" 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