css动画库
纯CSS实现BB-8 机器人在沙漠和太空来回切换场景
Dec 22, 2025
107 阅读
官方团队
这是一个非常精致的纯 CSS 作品，还原了《星球大战》中 BB-8 机器人在塔图因星球（Tatooine）沙漠和太空之间切换的场景。
### 效果预览
请点击开关，观察 BB-8 的滚动动画、头部的晃动细节，以及背景从沙漠白天切换到星空夜晚的过渡：
***donghua
<style>
.bb8-toggle {
--toggle-size: 16px;
--toggle-width: 10.625em;
--toggle-height: 5.625em;
--toggle-offset: calc((var(--toggle-height) - var(--bb8-diameter)) / 2);
--toggle-bg: linear-gradient(#2c4770, #070e2b 35%, #628cac 50% 70%, #a6c5d4)
no-repeat;
--bb8-diameter: 4.375em;
--radius: 99em;
--transition: 0.4s;
--accent: #de7d2f;
--bb8-bg: #fff;
}
.bb8-toggle,
.bb8-toggle *,
.bb8-toggle *::before,
.bb8-toggle *::after {
-webkit-box-sizing: border-box;
box-sizing: border-box;
}
.bb8-toggle {
cursor: pointer;
margin-top: var(--margin-top-for-head);
font-size: var(--toggle-size);
display: flex; /* 简单居中，不加额外背景色 */
justify-content: center;
margin: 50px auto;
}
.bb8-toggle__checkbox {
-webkit-appearance: none;
-moz-appearance: none;
appearance: none;
display: none;
}
.bb8-toggle__container {
width: var(--toggle-width);
height: var(--toggle-height);
background: var(--toggle-bg);
background-size: 100% 11.25em;
background-position-y: -5.625em;
border-radius: var(--radius);
position: relative;
-webkit-transition: var(--transition);
-o-transition: var(--transition);
transition: var(--transition);
}
.bb8 {
display: -webkit-box;
display: -ms-flexbox;
display: flex;
-webkit-box-orient: vertical;
-webkit-box-direction: normal;
-ms-flex-direction: column;
flex-direction: column;
-webkit-box-align: center;
-ms-flex-align: center;
align-items: center;
position: absolute;
top: calc(var(--toggle-offset) - 1.688em + 0.188em);
left: var(--toggle-offset);
-webkit-transition: var(--transition);
-o-transition: var(--transition);
transition: var(--transition);
z-index: 2;
}
.bb8__head-container {
position: relative;
-webkit-transition: var(--transition);
-o-transition: var(--transition);
transition: var(--transition);
z-index: 2;
-webkit-transform-origin: 1.25em 3.75em;
-ms-transform-origin: 1.25em 3.75em;
transform-origin: 1.25em 3.75em;
}
.bb8__head {
overflow: hidden;
margin-bottom: -0.188em;
width: 2.5em;
height: 1.688em;
background: -o-linear-gradient(
transparent 0.063em,
dimgray 0.063em 0.313em,
transparent 0.313em 0.375em,
var(--accent) 0.375em 0.5em,
transparent 0.5em 1.313em,
silver 1.313em 1.438em,
transparent 1.438em
),
-o-linear-gradient(45deg, transparent 0.188em, var(--bb8-bg) 0.188em 1.25em, transparent
1.25em),
-o-linear-gradient(135deg, transparent 0.188em, var(--bb8-bg) 0.188em 1.25em, transparent
1.25em),
-o-linear-gradient(var(--bb8-bg) 1.25em, transparent 1.25em);
background: linear-gradient(
transparent 0.063em,
dimgray 0.063em 0.313em,
transparent 0.313em 0.375em,
var(--accent) 0.375em 0.5em,
transparent 0.5em 1.313em,
silver 1.313em 1.438em,
transparent 1.438em
),
linear-gradient(
45deg,
transparent 0.188em,
var(--bb8-bg) 0.188em 1.25em,
transparent 1.25em
),
linear-gradient(
-45deg,
transparent 0.188em,
var(--bb8-bg) 0.188em 1.25em,
transparent 1.25em
),
linear-gradient(var(--bb8-bg) 1.25em, transparent 1.25em);
border-radius: var(--radius) var(--radius) 0 0;
position: relative;
z-index: 1;
-webkit-filter: drop-shadow(0 0.063em 0.125em gray);
filter: drop-shadow(0 0.063em 0.125em gray);
}
.bb8__head::before {
content: "";
position: absolute;
width: 0.563em;
height: 0.563em;
background: -o-radial-gradient(
0.25em 0.375em,
0.125em circle,
red,
transparent
),
-o-radial-gradient(0.375em 0.188em, 0.063em circle, var(--bb8-bg) 50%, transparent
100%),
-o-linear-gradient(45deg, #000 0.188em, dimgray 0.313em 0.375em, #000 0.5em);
background: radial-gradient(
0.125em circle at 0.25em 0.375em,
red,
transparent
),
radial-gradient(
0.063em circle at 0.375em 0.188em,
var(--bb8-bg) 50%,
transparent 100%
),
linear-gradient(45deg, #000 0.188em, dimgray 0.313em 0.375em, #000 0.5em);
border-radius: var(--radius);
top: 0.413em;
left: 50%;
-webkit-transform: translate(-50%);
-ms-transform: translate(-50%);
transform: translate(-50%);
-webkit-box-shadow: 0 0 0 0.089em lightgray, 0.563em 0.281em 0 -0.148em,
0.563em 0.281em 0 -0.1em var(--bb8-bg), 0.563em 0.281em 0 -0.063em;
box-shadow: 0 0 0 0.089em lightgray, 0.563em 0.281em 0 -0.148em,
0.563em 0.281em 0 -0.1em var(--bb8-bg), 0.563em 0.281em 0 -0.063em;
z-index: 1;
-webkit-transition: var(--transition);
-o-transition: var(--transition);
transition: var(--transition);
}
.bb8__head::after {
content: "";
position: absolute;
bottom: 0.375em;
left: 0;
width: 100%;
height: 0.188em;
background: -o-linear-gradient(
left,
var(--accent) 0.125em,
transparent 0.125em 0.188em,
var(--accent) 0.188em 0.313em,
transparent 0.313em 0.375em,
var(--accent) 0.375em 0.938em,
transparent 0.938em 1em,
var(--accent) 1em 1.125em,
transparent 1.125em 1.875em,
var(--accent) 1.875em 2em,
transparent 2em 2.063em,
var(--accent) 2.063em 2.25em,
transparent 2.25em 2.313em,
var(--accent) 2.313em 2.375em,
transparent 2.375em 2.438em,
var(--accent) 2.438em
);
background: linear-gradient(
to right,
var(--accent) 0.125em,
transparent 0.125em 0.188em,
var(--accent) 0.188em 0.313em,
transparent 0.313em 0.375em,
var(--accent) 0.375em 0.938em,
transparent 0.938em 1em,
var(--accent) 1em 1.125em,
transparent 1.125em 1.875em,
var(--accent) 1.875em 2em,
transparent 2em 2.063em,
var(--accent) 2.063em 2.25em,
transparent 2.25em 2.313em,
var(--accent) 2.313em 2.375em,
transparent 2.375em 2.438em,
var(--accent) 2.438em
);
-webkit-transition: var(--transition);
-o-transition: var(--transition);
transition: var(--transition);
}
.bb8__antenna {
position: absolute;
-webkit-transform: translateY(-90%);
-ms-transform: translateY(-90%);
transform: translateY(-90%);
width: 0.059em;
border-radius: var(--radius) var(--radius) 0 0;
-webkit-transition: var(--transition);
-o-transition: var(--transition);
transition: var(--transition);
}
.bb8__antenna:nth-child(1) {
height: 0.938em;
right: 0.938em;
background: -o-linear-gradient(#000 0.188em, silver 0.188em);
background: linear-gradient(#000 0.188em, silver 0.188em);
}
.bb8__antenna:nth-child(2) {
height: 0.375em;
left: 50%;
-webkit-transform: translate(-50%, -90%);
-ms-transform: translate(-50%, -90%);
transform: translate(-50%, -90%);
background: silver;
}
.bb8__body {
width: 4.375em;
height: 4.375em;
background: var(--bb8-bg);
border-radius: var(--radius);
position: relative;
overflow: hidden;
-webkit-transition: var(--transition);
-o-transition: var(--transition);
transition: var(--transition);
z-index: 1;
-webkit-transform: rotate(45deg);
-ms-transform: rotate(45deg);
transform: rotate(45deg);
background: -o-linear-gradient(
right,
var(--bb8-bg) 4%,
var(--accent) 4% 10%,
transparent 10% 90%,
var(--accent) 90% 96%,
var(--bb8-bg) 96%
),
-o-linear-gradient(var(--bb8-bg) 4%, var(--accent) 4% 10%, transparent 10%
90%, var(--accent) 90% 96%, var(--bb8-bg) 96%),
-o-linear-gradient(left, transparent 2.156em, silver 2.156em 2.219em, transparent
2.188em),
-o-linear-gradient(transparent 2.156em, silver 2.156em 2.219em, transparent
2.188em);
background: linear-gradient(
-90deg,
var(--bb8-bg) 4%,
var(--accent) 4% 10%,
transparent 10% 90%,
var(--accent) 90% 96%,
var(--bb8-bg) 96%
),
linear-gradient(
var(--bb8-bg) 4%,
var(--accent) 4% 10%,
transparent 10% 90%,
var(--accent) 90% 96%,
var(--bb8-bg) 96%
),
linear-gradient(
to right,
transparent 2.156em,
silver 2.156em 2.219em,
transparent 2.188em
),
linear-gradient(
transparent 2.156em,
silver 2.156em 2.219em,
transparent 2.188em
);
background-color: var(--bb8-bg);
}
.bb8__body::after {
content: "";
bottom: 1.5em;
left: 0.563em;
position: absolute;
width: 0.188em;
height: 0.188em;
background: rgb(236, 236, 236);
color: rgb(236, 236, 236);
border-radius: 50%;
-webkit-box-shadow: 0.875em 0.938em, 0 -1.25em, 0.875em -2.125em,
2.125em -2.125em, 3.063em -1.25em, 3.063em 0, 2.125em 0.938em;
box-shadow: 0.875em 0.938em, 0 -1.25em, 0.875em -2.125em, 2.125em -2.125em,
3.063em -1.25em, 3.063em 0, 2.125em 0.938em;
}
.bb8__body::before {
content: "";
width: 2.625em;
height: 2.625em;
position: absolute;
border-radius: 50%;
z-index: 0.1;
overflow: hidden;
top: 50%;
left: 50%;
-webkit-transform: translate(-50%, -50%);
-ms-transform: translate(-50%, -50%);
transform: translate(-50%, -50%);
border: 0.313em solid var(--accent);
background: -o-radial-gradient(
center,
1em circle,
rgb(236, 236, 236) 50%,
transparent 51%
),
-o-radial-gradient(center, 1.25em circle, var(--bb8-bg) 50%, transparent 51%),
-o-linear-gradient(right, transparent 42%, var(--accent) 42% 58%, transparent
58%),
-o-linear-gradient(var(--bb8-bg) 42%, var(--accent) 42% 58%, var(--bb8-bg)
58%);
background: radial-gradient(
1em circle at center,
rgb(236, 236, 236) 50%,
transparent 51%
),
radial-gradient(1.25em circle at center, var(--bb8-bg) 50%, transparent 51%),
linear-gradient(
-90deg,
transparent 42%,
var(--accent) 42% 58%,
transparent 58%
),
linear-gradient(var(--bb8-bg) 42%, var(--accent) 42% 58%, var(--bb8-bg) 58%);
}
.artificial__hidden {
position: absolute;
border-radius: inherit;
inset: 0;
pointer-events: none;
overflow: hidden;
}
.bb8__shadow {
content: "";
width: var(--bb8-diameter);
height: 20%;
border-radius: 50%;
background: #3a271c;
-webkit-box-shadow: 0.313em 0 3.125em #3a271c;
box-shadow: 0.313em 0 3.125em #3a271c;
opacity: 0.25;
position: absolute;
bottom: 0;
left: calc(var(--toggle-offset) - 0.938em);
-webkit-transition: var(--transition);
-o-transition: var(--transition);
transition: var(--transition);
-webkit-transform: skew(-70deg);
-ms-transform: skew(-70deg);
transform: skew(-70deg);
z-index: 1;
}
.bb8-toggle__scenery {
width: 100%;
height: 100%;
pointer-events: none;
overflow: hidden;
position: relative;
border-radius: inherit;
}
.bb8-toggle__scenery::before {
content: "";
position: absolute;
width: 100%;
height: 30%;
bottom: 0;
background: #b18d71;
z-index: 1;
}
.bb8-toggle__cloud {
z-index: 1;
position: absolute;
border-radius: 50%;
}
.bb8-toggle__cloud:nth-last-child(1) {
width: 0.875em;
height: 0.625em;
-webkit-filter: blur(0.125em) drop-shadow(0.313em 0.313em #ffffffae)
drop-shadow(-0.625em 0 #fff) drop-shadow(-0.938em -0.125em #fff);
filter: blur(0.125em) drop-shadow(0.313em 0.313em #ffffffae)
drop-shadow(-0.625em 0 #fff) drop-shadow(-0.938em -0.125em #fff);
right: 1.875em;
top: 2.813em;
background: -o-linear-gradient(bottom left, #ffffffae, #ffffffae);
background: linear-gradient(to top right, #ffffffae, #ffffffae);
-webkit-transition: var(--transition);
-o-transition: var(--transition);
transition: var(--transition);
}
.bb8-toggle__cloud:nth-last-child(2) {
top: 0.625em;
right: 4.375em;
width: 0.875em;
height: 0.375em;
background: #dfdedeae;
-webkit-filter: blur(0.125em) drop-shadow(-0.313em -0.188em #e0dfdfae)
drop-shadow(-0.625em -0.188em #bbbbbbae) drop-shadow(-1em 0.063em #cfcfcfae);
filter: blur(0.125em) drop-shadow(-0.313em -0.188em #e0dfdfae)
drop-shadow(-0.625em -0.188em #bbbbbbae) drop-shadow(-1em 0.063em #cfcfcfae);
-webkit-transition: 0.6s;
-o-transition: 0.6s;
transition: 0.6s;
}
.bb8-toggle__cloud:nth-last-child(3) {
top: 1.25em;
right: 0.938em;
width: 0.875em;
height: 0.375em;
background: #ffffffae;
-webkit-filter: blur(0.125em) drop-shadow(0.438em 0.188em #ffffffae)
drop-shadow(-0.625em 0.313em #ffffffae);
filter: blur(0.125em) drop-shadow(0.438em 0.188em #ffffffae)
drop-shadow(-0.625em 0.313em #ffffffae);
-webkit-transition: 0.8s;
-o-transition: 0.8s;
transition: 0.8s;
}
.gomrassen,
.hermes,
.chenini {
position: absolute;
border-radius: var(--radius);
background: -o-linear-gradient(#fff, #6e8ea2);
background: linear-gradient(#fff, #6e8ea2);
top: 100%;
}
.gomrassen {
left: 0.938em;
width: 1.875em;
height: 1.875em;
-webkit-box-shadow: 0 0 0.188em #ffffff52, 0 0 0.188em #6e8ea24b;
box-shadow: 0 0 0.188em #ffffff52, 0 0 0.188em #6e8ea24b;
-webkit-transition: var(--transition);
-o-transition: var(--transition);
transition: var(--transition);
}
.gomrassen::before,
.gomrassen::after {
content: "";
position: absolute;
border-radius: inherit;
-webkit-box-shadow: inset 0 0 0.063em rgb(140, 162, 169);
box-shadow: inset 0 0 0.063em rgb(140, 162, 169);
background: rgb(184, 196, 200);
}
.gomrassen::before {
left: 0.313em;
top: 0.313em;
width: 0.438em;
height: 0.438em;
}
.gomrassen::after {
width: 0.25em;
height: 0.25em;
left: 1.25em;
top: 0.75em;
}
.hermes {
left: 3.438em;
width: 0.625em;
height: 0.625em;
-webkit-box-shadow: 0 0 0.125em #ffffff52, 0 0 0.125em #6e8ea24b;
box-shadow: 0 0 0.125em #ffffff52, 0 0 0.125em #6e8ea24b;
-webkit-transition: 0.6s;
-o-transition: 0.6s;
transition: 0.6s;
}
.chenini {
left: 4.375em;
width: 0.5em;
height: 0.5em;
-webkit-box-shadow: 0 0 0.125em #ffffff52, 0 0 0.125em #6e8ea24b;
box-shadow: 0 0 0.125em #ffffff52, 0 0 0.125em #6e8ea24b;
-webkit-transition: 0.8s;
-o-transition: 0.8s;
transition: 0.8s;
}
.tatto-1,
.tatto-2 {
position: absolute;
width: 1.25em;
height: 1.25em;
border-radius: var(--radius);
}
.tatto-1 {
background: #fefefe;
right: 3.125em;
top: 0.625em;
-webkit-box-shadow: 0 0 0.438em #fdf4e1;
box-shadow: 0 0 0.438em #fdf4e1;
-webkit-transition: var(--transition);
-o-transition: var(--transition);
transition: var(--transition);
}
.tatto-2 {
background: -o-linear-gradient(#e6ac5c, #d75449);
background: linear-gradient(#e6ac5c, #d75449);
right: 1.25em;
top: 2.188em;
-webkit-box-shadow: 0 0 0.438em #e6ad5c3d, 0 0 0.438em #d755494f;
box-shadow: 0 0 0.438em #e6ad5c3d, 0 0 0.438em #d755494f;
-webkit-transition: 0.7s;
-o-transition: 0.7s;
transition: 0.7s;
}
.bb8-toggle__star {
position: absolute;
width: 0.063em;
height: 0.063em;
background: #fff;
border-radius: var(--radius);
-webkit-filter: drop-shadow(0 0 0.063em #fff);
filter: drop-shadow(0 0 0.063em #fff);
color: #fff;
top: 100%;
}
.bb8-toggle__star:nth-child(1) {
left: 3.75em;
-webkit-box-shadow: 1.25em 0.938em, -1.25em 2.5em, 0 1.25em, 1.875em 0.625em,
-3.125em 1.875em, 1.25em 2.813em;
box-shadow: 1.25em 0.938em, -1.25em 2.5em, 0 1.25em, 1.875em 0.625em,
-3.125em 1.875em, 1.25em 2.813em;
-webkit-transition: 0.2s;
-o-transition: 0.2s;
transition: 0.2s;
}
.bb8-toggle__star:nth-child(2) {
left: 4.688em;
-webkit-box-shadow: 0.625em 0, 0 0.625em, -0.625em -0.625em, 0.625em 0.938em,
-3.125em 1.25em, 1.25em -1.563em;
box-shadow: 0.625em 0, 0 0.625em, -0.625em -0.625em, 0.625em 0.938em,
-3.125em 1.25em, 1.25em -1.563em;
-webkit-transition: 0.3s;
-o-transition: 0.3s;
transition: 0.3s;
}
.bb8-toggle__star:nth-child(3) {
left: 5.313em;
-webkit-box-shadow: -0.625em -0.625em, -2.188em 1.25em, -2.188em 0,
-3.75em -0.625em, -3.125em -0.625em, -2.5em -0.313em, 0.75em -0.625em;
box-shadow: -0.625em -0.625em, -2.188em 1.25em, -2.188em 0, -3.75em -0.625em,
-3.125em -0.625em, -2.5em -0.313em, 0.75em -0.625em;
-webkit-transition: var(--transition);
-o-transition: var(--transition);
transition: var(--transition);
}
.bb8-toggle__star:nth-child(4) {
left: 1.875em;
width: 0.125em;
height: 0.125em;
-webkit-transition: 0.5s;
-o-transition: 0.5s;
transition: 0.5s;
}
.bb8-toggle__star:nth-child(5) {
left: 5em;
width: 0.125em;
height: 0.125em;
-webkit-transition: 0.6s;
-o-transition: 0.6s;
transition: 0.6s;
}
.bb8-toggle__star:nth-child(6) {
left: 2.5em;
width: 0.125em;
height: 0.125em;
-webkit-transition: 0.7s;
-o-transition: 0.7s;
transition: 0.7s;
}
.bb8-toggle__star:nth-child(7) {
left: 3.438em;
width: 0.125em;
height: 0.125em;
-webkit-transition: 0.8s;
-o-transition: 0.8s;
transition: 0.8s;
}
/* actions */
.bb8-toggle__checkbox:checked
+ .bb8-toggle__container
.bb8-toggle__star:nth-child(1) {
top: 0.625em;
}
.bb8-toggle__checkbox:checked
+ .bb8-toggle__container
.bb8-toggle__star:nth-child(2) {
top: 1.875em;
}
.bb8-toggle__checkbox:checked
+ .bb8-toggle__container
.bb8-toggle__star:nth-child(3) {
top: 1.25em;
}
.bb8-toggle__checkbox:checked
+ .bb8-toggle__container
.bb8-toggle__star:nth-child(4) {
top: 3.438em;
}
.bb8-toggle__checkbox:checked
+ .bb8-toggle__container
.bb8-toggle__star:nth-child(5) {
top: 3.438em;
}
.bb8-toggle__checkbox:checked
+ .bb8-toggle__container
.bb8-toggle__star:nth-child(6) {
top: 0.313em;
}
.bb8-toggle__checkbox:checked
+ .bb8-toggle__container
.bb8-toggle__star:nth-child(7) {
top: 1.875em;
}
.bb8-toggle__checkbox:checked + .bb8-toggle__container .bb8-toggle__cloud {
right: -100%;
}
.bb8-toggle__checkbox:checked + .bb8-toggle__container .gomrassen {
top: 0.938em;
}
.bb8-toggle__checkbox:checked + .bb8-toggle__container .hermes {
top: 2.5em;
}
.bb8-toggle__checkbox:checked + .bb8-toggle__container .chenini {
top: 2.75em;
}
.bb8-toggle__checkbox:checked + .bb8-toggle__container {
background-position-y: 0;
}
.bb8-toggle__checkbox:checked + .bb8-toggle__container .tatto-1 {
top: 100%;
}
.bb8-toggle__checkbox:checked + .bb8-toggle__container .tatto-2 {
top: 100%;
}
.bb8-toggle__checkbox:checked + .bb8-toggle__container .bb8 {
left: calc(100% - var(--bb8-diameter) - var(--toggle-offset));
}
.bb8-toggle__checkbox:checked + .bb8-toggle__container .bb8__shadow {
left: calc(100% - var(--bb8-diameter) - var(--toggle-offset) + 0.938em);
-webkit-transform: skew(70deg);
-ms-transform: skew(70deg);
transform: skew(70deg);
}
.bb8-toggle__checkbox:checked + .bb8-toggle__container .bb8__body {
-webkit-transform: rotate(180deg);
-ms-transform: rotate(180deg);
transform: rotate(225deg);
}
.bb8-toggle__checkbox:hover + .bb8-toggle__container .bb8__head::before {
left: 100%;
}
.bb8-toggle__checkbox:not(:checked):hover
+ .bb8-toggle__container
.bb8__antenna:nth-child(1) {
right: 1.5em;
}
.bb8-toggle__checkbox:hover
+ .bb8-toggle__container
.bb8__antenna:nth-child(2) {
left: 0.938em;
}
.bb8-toggle__checkbox:hover + .bb8-toggle__container .bb8__head::after {
background-position: 1.375em 0;
}
.bb8-toggle__checkbox:checked:hover
+ .bb8-toggle__container
.bb8__head::before {
left: 0;
}
.bb8-toggle__checkbox:checked:hover
+ .bb8-toggle__container
.bb8__antenna:nth-child(2) {
left: calc(100% - 0.938em);
}
.bb8-toggle__checkbox:checked:hover + .bb8-toggle__container .bb8__head::after {
background-position: -1.375em 0;
}
.bb8-toggle__checkbox:active + .bb8-toggle__container .bb8__head-container {
-webkit-transform: rotate(25deg);
-ms-transform: rotate(25deg);
transform: rotate(25deg);
}
.bb8-toggle__checkbox:checked:active
+ .bb8-toggle__container
.bb8__head-container {
-webkit-transform: rotate(-25deg);
-ms-transform: rotate(-25deg);
transform: rotate(-25deg);
}
.bb8:hover .bb8__head::before,
.bb8:hover .bb8__antenna:nth-child(2) {
left: 50% !important;
}
.bb8:hover .bb8__antenna:nth-child(1) {
right: 0.938em !important;
}
.bb8:hover .bb8__head::after {
background-position: 0 0 !important;
}
</style>
<label class="bb8-toggle">
<input class="bb8-toggle__checkbox" type="checkbox">
<div class="bb8-toggle__container">
<div class="bb8-toggle__scenery">
<div class="bb8-toggle__star"></div>
<div class="bb8-toggle__star"></div>
<div class="bb8-toggle__star"></div>
<div class="bb8-toggle__star"></div>
<div class="bb8-toggle__star"></div>
<div class="bb8-toggle__star"></div>
<div class="bb8-toggle__star"></div>
<div class="tatto-1"></div>
<div class="tatto-2"></div>
<div class="gomrassen"></div>
<div class="hermes"></div>
<div class="chenini"></div>
<div class="bb8-toggle__cloud"></div>
<div class="bb8-toggle__cloud"></div>
<div class="bb8-toggle__cloud"></div>
</div>
<div class="bb8">
<div class="bb8__head-container">
<div class="bb8__antenna"></div>
<div class="bb8__antenna"></div>
<div class="bb8__head"></div>
</div>
<div class="bb8__body"></div>
</div>
<div class="artificial__hidden">
<div class="bb8__shadow"></div>
</div>
</div>
</label>
***
### 技术亮点解析
这个开关的细节非常惊人，作者 Galahhad 在 Uiverse.io 上发布了这个重制版。
1. **背景切换机制**：
* `.bb8-toggle__container` 的背景是一个巨大的 `linear-gradient`，包含了白天的蓝色天空和夜晚的深蓝星空。
* 通过改变 `background-position-y`，实现从白天（沙漠）到夜晚（太空）的平滑过渡。
2. **纯 CSS 绘图**：
* BB-8 的身体纹理、头部的眼睛、甚至背景中的云朵和卫星（Gomrassen, Hermes, Chenini 是塔图因的三颗卫星），全部是用 `linear-gradient` 和 `radial-gradient` 堆叠出来的，没有使用任何 SVG 或图片。
3. **动态交互细节**：
* **滚动动画**：当开关切换时，BB-8 的身体 `.bb8__body` 会旋转 225 度，模拟滚动的效果。
* **头部惯性**：在 `active`（按住鼠标）状态下，头部会有一个倾斜动画 (`rotate(25deg)`)，模拟急停或加速时的惯性。
* **阴影跟随**：底部的阴影 `.bb8__shadow` 会随着 BB-8 的移动而改变 `skew`（倾斜）角度，增强了移动的真实感。
4. **彩蛋**：
* 背景中甚至包含了塔图因的双子太阳（Tatooine's twin suns），在白天模式下可见。
### 源码自取
```html
<label class="bb8-toggle">
<input class="bb8-toggle__checkbox" type="checkbox">
<div class="bb8-toggle__container">
<div class="bb8-toggle__scenery">
<div class="bb8-toggle__star"></div>
<div class="bb8-toggle__star"></div>
<div class="bb8-toggle__star"></div>
<div class="bb8-toggle__star"></div>
<div class="bb8-toggle__star"></div>
<div class="bb8-toggle__star"></div>
<div class="bb8-toggle__star"></div>
<div class="tatto-1"></div>
<div class="tatto-2"></div>
<div class="gomrassen"></div>
<div class="hermes"></div>
<div class="chenini"></div>
<div class="bb8-toggle__cloud"></div>
<div class="bb8-toggle__cloud"></div>
<div class="bb8-toggle__cloud"></div>
</div>
<div class="bb8">
<div class="bb8__head-container">
<div class="bb8__antenna"></div>
<div class="bb8__antenna"></div>
<div class="bb8__head"></div>
</div>
<div class="bb8__body"></div>
</div>
<div class="artificial__hidden">
<div class="bb8__shadow"></div>
</div>
</div>
</label>
<style>
.bb8-toggle {
--toggle-size: 16px;
--toggle-width: 10.625em;
--toggle-height: 5.625em;
--toggle-offset: calc((var(--toggle-height) - var(--bb8-diameter)) / 2);
--toggle-bg: linear-gradient(#2c4770, #070e2b 35%, #628cac 50% 70%, #a6c5d4) no-repeat;
--bb8-diameter: 4.375em;
--radius: 99em;
--transition: 0.4s;
--accent: #de7d2f;
--bb8-bg: #fff;
}
.bb8-toggle, .bb8-toggle *, .bb8-toggle *::before, .bb8-toggle *::after {
box-sizing: border-box;
}
.bb8-toggle {
cursor: pointer;
font-size: var(--toggle-size);
display: flex;
justify-content: center;
}
.bb8-toggle__checkbox {
appearance: none;
display: none;
}
.bb8-toggle__container {
width: var(--toggle-width);
height: var(--toggle-height);
background: var(--toggle-bg);
background-size: 100% 11.25em;
background-position-y: -5.625em;
border-radius: var(--radius);
position: relative;
transition: var(--transition);
}
.bb8 {
display: flex;
flex-direction: column;
align-items: center;
position: absolute;
top: calc(var(--toggle-offset) - 1.688em + 0.188em);
left: var(--toggle-offset);
transition: var(--transition);
z-index: 2;
}
.bb8__head-container {
position: relative;
transition: var(--transition);
z-index: 2;
transform-origin: 1.25em 3.75em;
}
.bb8__head {
overflow: hidden;
margin-bottom: -0.188em;
width: 2.5em;
height: 1.688em;
background: linear-gradient(transparent 0.063em, dimgray 0.063em 0.313em, transparent 0.313em 0.375em, var(--accent) 0.375em 0.5em, transparent 0.5em 1.313em, silver 1.313em 1.438em, transparent 1.438em),
linear-gradient(45deg, transparent 0.188em, var(--bb8-bg) 0.188em 1.25em, transparent 1.25em),
linear-gradient(-45deg, transparent 0.188em, var(--bb8-bg) 0.188em 1.25em, transparent 1.25em),
linear-gradient(var(--bb8-bg) 1.25em, transparent 1.25em);
border-radius: var(--radius) var(--radius) 0 0;
position: relative;
z-index: 1;
filter: drop-shadow(0 0.063em 0.125em gray);
}
.bb8__head::before {
content: "";
position: absolute;
width: 0.563em;
height: 0.563em;
background: radial-gradient(0.125em circle at 0.25em 0.375em, red, transparent),
radial-gradient(0.063em circle at 0.375em 0.188em, var(--bb8-bg) 50%, transparent 100%),
linear-gradient(45deg, #000 0.188em, dimgray 0.313em 0.375em, #000 0.5em);
border-radius: var(--radius);
top: 0.413em;
left: 50%;
transform: translate(-50%);
box-shadow: 0 0 0 0.089em lightgray, 0.563em 0.281em 0 -0.148em, 0.563em 0.281em 0 -0.1em var(--bb8-bg), 0.563em 0.281em 0 -0.063em;
z-index: 1;
transition: var(--transition);
}
.bb8__head::after {
content: "";
position: absolute;
bottom: 0.375em;
left: 0;
width: 100%;
height: 0.188em;
background: linear-gradient(to right, var(--accent) 0.125em, transparent 0.125em 0.188em, var(--accent) 0.188em 0.313em, transparent 0.313em 0.375em, var(--accent) 0.375em 0.938em, transparent 0.938em 1em, var(--accent) 1em 1.125em, transparent 1.125em 1.875em, var(--accent) 1.875em 2em, transparent 2em 2.063em, var(--accent) 2.063em 2.25em, transparent 2.25em 2.313em, var(--accent) 2.313em 2.375em, transparent 2.375em 2.438em, var(--accent) 2.438em);
transition: var(--transition);
}
.bb8__antenna {
position: absolute;
transform: translateY(-90%);
width: 0.059em;
border-radius: var(--radius) var(--radius) 0 0;
transition: var(--transition);
}
.bb8__antenna:nth-child(1) {
height: 0.938em;
right: 0.938em;
background: linear-gradient(#000 0.188em, silver 0.188em);
}
.bb8__antenna:nth-child(2) {
height: 0.375em;
left: 50%;
transform: translate(-50%, -90%);
background: silver;
}
.bb8__body {
width: 4.375em;
height: 4.375em;
background: var(--bb8-bg);
border-radius: var(--radius);
position: relative;
overflow: hidden;
transition: var(--transition);
z-index: 1;
transform: rotate(45deg);
background: linear-gradient(-90deg, var(--bb8-bg) 4%, var(--accent) 4% 10%, transparent 10% 90%, var(--accent) 90% 96%, var(--bb8-bg) 96%),
linear-gradient(var(--bb8-bg) 4%, var(--accent) 4% 10%, transparent 10% 90%, var(--accent) 90% 96%, var(--bb8-bg) 96%),
linear-gradient(to right, transparent 2.156em, silver 2.156em 2.219em, transparent 2.188em),
linear-gradient(transparent 2.156em, silver 2.156em 2.219em, transparent 2.188em);
background-color: var(--bb8-bg);
}
.bb8__body::after {
content: "";
bottom: 1.5em;
left: 0.563em;
position: absolute;
width: 0.188em;
height: 0.188em;
background: rgb(236, 236, 236);
border-radius: 50%;
box-shadow: 0.875em 0.938em, 0 -1.25em, 0.875em -2.125em, 2.125em -2.125em, 3.063em -1.25em, 3.063em 0, 2.125em 0.938em;
}
.bb8__body::before {
content: "";
width: 2.625em;
height: 2.625em;
position: absolute;
border-radius: 50%;
z-index: 0.1;
overflow: hidden;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
border: 0.313em solid var(--accent);
background: radial-gradient(1em circle at center, rgb(236, 236, 236) 50%, transparent 51%),
radial-gradient(1.25em circle at center, var(--bb8-bg) 50%, transparent 51%),
linear-gradient(-90deg, transparent 42%, var(--accent) 42% 58%, transparent 58%),
linear-gradient(var(--bb8-bg) 42%, var(--accent) 42% 58%, var(--bb8-bg) 58%);
}
.artificial__hidden {
position: absolute;
border-radius: inherit;
inset: 0;
pointer-events: none;
overflow: hidden;
}
.bb8__shadow {
content: "";
width: var(--bb8-diameter);
height: 20%;
border-radius: 50%;
background: #3a271c;
box-shadow: 0.313em 0 3.125em #3a271c;
opacity: 0.25;
position: absolute;
bottom: 0;
left: calc(var(--toggle-offset) - 0.938em);
transition: var(--transition);
transform: skew(-70deg);
z-index: 1;
}
.bb8-toggle__scenery {
width: 100%;
height: 100%;
pointer-events: none;
overflow: hidden;
position: relative;
border-radius: inherit;
}
.bb8-toggle__scenery::before {
content: "";
position: absolute;
width: 100%;
height: 30%;
bottom: 0;
background: #b18d71;
z-index: 1;
}
.bb8-toggle__cloud {
z-index: 1;
position: absolute;
border-radius: 50%;
}
.bb8-toggle__cloud:nth-last-child(1) {
width: 0.875em;
height: 0.625em;
filter: blur(0.125em) drop-shadow(0.313em 0.313em #ffffffae) drop-shadow(-0.625em 0 #fff) drop-shadow(-0.938em -0.125em #fff);
right: 1.875em;
top: 2.813em;
background: linear-gradient(to top right, #ffffffae, #ffffffae);
transition: var(--transition);
}
.bb8-toggle__cloud:nth-last-child(2) {
top: 0.625em;
right: 4.375em;
width: 0.875em;
height: 0.375em;
background: #dfdedeae;
filter: blur(0.125em) drop-shadow(-0.313em -0.188em #e0dfdfae) drop-shadow(-0.625em -0.188em #bbbbbbae) drop-shadow(-1em 0.063em #cfcfcfae);
transition: 0.6s;
}
.bb8-toggle__cloud:nth-last-child(3) {
top: 1.25em;
right: 0.938em;
width: 0.875em;
height: 0.375em;
background: #ffffffae;
filter: blur(0.125em) drop-shadow(0.438em 0.188em #ffffffae) drop-shadow(-0.625em 0.313em #ffffffae);
transition: 0.8s;
}
.gomrassen, .hermes, .chenini {
position: absolute;
border-radius: var(--radius);
background: linear-gradient(#fff, #6e8ea2);
top: 100%;
}
.gomrassen {
left: 0.938em;
width: 1.875em;
height: 1.875em;
box-shadow: 0 0 0.188em #ffffff52, 0 0 0.188em #6e8ea24b;
transition: var(--transition);
}
.gomrassen::before, .gomrassen::after {
content: "";
position: absolute;
border-radius: inherit;
box-shadow: inset 0 0 0.063em rgb(140, 162, 169);
background: rgb(184, 196, 200);
}
.gomrassen::before { left: 0.313em; top: 0.313em; width: 0.438em; height: 0.438em; }
.gomrassen::after { width: 0.25em; height: 0.25em; left: 1.25em; top: 0.75em; }
.hermes {
left: 3.438em;
width: 0.625em;
height: 0.625em;
box-shadow: 0 0 0.125em #ffffff52, 0 0 0.125em #6e8ea24b;
transition: 0.6s;
}
.chenini {
left: 4.375em;
width: 0.5em;
height: 0.5em;
box-shadow: 0 0 0.125em #ffffff52, 0 0 0.125em #6e8ea24b;
transition: 0.8s;
}
.tatto-1, .tatto-2 {
position: absolute;
width: 1.25em;
height: 1.25em;
border-radius: var(--radius);
}
.tatto-1 {
background: #fefefe;
right: 3.125em;
top: 0.625em;
box-shadow: 0 0 0.438em #fdf4e1;
transition: var(--transition);
}
.tatto-2 {
background: linear-gradient(#e6ac5c, #d75449);
right: 1.25em;
top: 2.188em;
box-shadow: 0 0 0.438em #e6ad5c3d, 0 0 0.438em #d755494f;
transition: 0.7s;
}
.bb8-toggle__star {
position: absolute;
width: 0.063em;
height: 0.063em;
background: #fff;
border-radius: var(--radius);
filter: drop-shadow(0 0 0.063em #fff);
color: #fff;
top: 100%;
}
.bb8-toggle__star:nth-child(1) { left: 3.75em; box-shadow: 1.25em 0.938em, -1.25em 2.5em, 0 1.25em, 1.875em 0.625em, -3.125em 1.875em, 1.25em 2.813em; transition: 0.2s; }
.bb8-toggle__star:nth-child(2) { left: 4.688em; box-shadow: 0.625em 0, 0 0.625em, -0.625em -0.625em, 0.625em 0.938em, -3.125em 1.25em, 1.25em -1.563em; transition: 0.3s; }
.bb8-toggle__star:nth-child(3) { left: 5.313em; box-shadow: -0.625em -0.625em, -2.188em 1.25em, -2.188em 0, -3.75em -0.625em, -3.125em -0.625em, -2.5em -0.313em, 0.75em -0.625em; transition: var(--transition); }
.bb8-toggle__star:nth-child(4) { left: 1.875em; width: 0.125em; height: 0.125em; transition: 0.5s; }
.bb8-toggle__star:nth-child(5) { left: 5em; width: 0.125em; height: 0.125em; transition: 0.6s; }
.bb8-toggle__star:nth-child(6) { left: 2.5em; width: 0.125em; height: 0.125em; transition: 0.7s; }
.bb8-toggle__star:nth-child(7) { left: 3.438em; width: 0.125em; height: 0.125em; transition: 0.8s; }
/* 状态切换逻辑 */
.bb8-toggle__checkbox:checked + .bb8-toggle__container .bb8-toggle__star:nth-child(1) { top: 0.625em; }
.bb8-toggle__checkbox:checked + .bb8-toggle__container .bb8-toggle__star:nth-child(2) { top: 1.875em; }
.bb8-toggle__checkbox:checked + .bb8-toggle__container .bb8-toggle__star:nth-child(3) { top: 1.25em; }
.bb8-toggle__checkbox:checked + .bb8-toggle__container .bb8-toggle__star:nth-child(4) { top: 3.438em; }
.bb8-toggle__checkbox:checked + .bb8-toggle__container .bb8-toggle__star:nth-child(5) { top: 3.438em; }
.bb8-toggle__checkbox:checked + .bb8-toggle__container .bb8-toggle__star:nth-child(6) { top: 0.313em; }
.bb8-toggle__checkbox:checked + .bb8-toggle__container .bb8-toggle__star:nth-child(7) { top: 1.875em; }
.bb8-toggle__checkbox:checked + .bb8-toggle__container .bb8-toggle__cloud { right: -100%; }
.bb8-toggle__checkbox:checked + .bb8-toggle__container .gomrassen { top: 0.938em; }
.bb8-toggle__checkbox:checked + .bb8-toggle__container .hermes { top: 2.5em; }
.bb8-toggle__checkbox:checked + .bb8-toggle__container .chenini { top: 2.75em; }
.bb8-toggle__checkbox:checked + .bb8-toggle__container { background-position-y: 0; }
.bb8-toggle__checkbox:checked + .bb8-toggle__container .tatto-1 { top: 100%; }
.bb8-toggle__checkbox:checked + .bb8-toggle__container .tatto-2 { top: 100%; }
.bb8-toggle__checkbox:checked + .bb8-toggle__container .bb8 { left: calc(100% - var(--bb8-diameter) - var(--toggle-offset)); }
.bb8-toggle__checkbox:checked + .bb8-toggle__container .bb8__shadow { left: calc(100% - var(--bb8-diameter) - var(--toggle-offset) + 0.938em); transform: skew(70deg); }
.bb8-toggle__checkbox:checked + .bb8-toggle__container .bb8__body { transform: rotate(225deg); }
.bb8-toggle__checkbox:hover + .bb8-toggle__container .bb8__head::before { left: 100%; }
.bb8-toggle__checkbox:not(:checked):hover + .bb8-toggle__container .bb8__antenna:nth-child(1) { right: 1.5em; }
.bb8-toggle__checkbox:hover + .bb8-toggle__container .bb8__antenna:nth-child(2) { left: 0.938em; }
.bb8-toggle__checkbox:hover + .bb8-toggle__container .bb8__head::after { background-position: 1.375em 0; }
.bb8-toggle__checkbox:checked:hover + .bb8-toggle__container .bb8__head::before { left: 0; }
.bb8-toggle__checkbox:checked:hover + .bb8-toggle__container .bb8__antenna:nth-child(2) { left: calc(100% - 0.938em); }
.bb8-toggle__checkbox:checked:hover + .bb8-toggle__container .bb8__head::after { background-position: -1.375em 0; }
.bb8-toggle__checkbox:active + .bb8-toggle__container .bb8__head-container { transform: rotate(25deg); }
.bb8-toggle__checkbox:checked:active + .bb8-toggle__container .bb8__head-container { transform: rotate(-25deg); }
.bb8:hover .bb8__head::before, .bb8:hover .bb8__antenna:nth-child(2) { left: 50% !important; }
.bb8:hover .bb8__antenna:nth-child(1) { right: 0.938em !important; }
.bb8:hover .bb8__head::after { background-position: 0 0 !important; }
</style>
```