本文介绍了一套精心设计的CSS样式规则，这些规则应用于HTML元素，确保了网页布局的一致性和高效性。通过设置通用选择器和特定类别的样式，能够实现响应式设计并保持良好的视觉效果。
CSS
语言：
CSSSCSS
确定
*, *:after, *:before {
-webkit-box-sizing: border-box;
-moz-box-sizing: border-box;
box-sizing: border-box; }
html, body {
height: 100%; }
body {
margin: 0;
padding: 0;
position: relative;
background: #023454; }
.wrapper {
position: relative;
display: block;
width: 480px;
overflow: hidden;
margin: 0 auto;
margin-top: 100px; }
.group {
position: relative; }
canvas {
width: 480px;
height: 280px;
border: 5px solid #fff;
background: #382742; }
video {
display: block;
width: 150px;
height: 90px;
position: absolute;
top: 0;
right: 0;
border: 5px solid #fff; }
input:focus {
outline: none; }
.snapinput {
color: #fff;
font-family: Helvetica, Arial, sans-serif;
font-weight: 500;
font-size: 18px;
border-radius: 0;
line-height: 22px;
background: #002e4e;
padding: 13px;
margin-bottom: 10px;
width: 80%;
border: 3px solid rgba(0, 0, 0, 0);
transition: all 0.5s ease; }
.snapinput:focus {
background: #fff;
box-shadow: 0;
border: 3px solid #002e4e;
color: #002e4e;
outline: none;
padding: 13px;
transition: all 0.5s ease; }
.snapBtn {
float: right;
width: 20%;
font-family: Helvetica, Arial, sans-serif;
font-weight: 500;
font-size: 18px;
border-radius: 0;
line-height: 22px;
padding: 13px;
margin-bottom: 10px;
border: 3px solid #002e4e;
cursor: pointer;
background: #031c40;
color: #fff;
transition: all 0.3s; }
.snapBtn:hover {
background: #fff;
box-shadow: 0;
border: 3px solid #002e4e;
color: #002e4e;
transition: all 0.3s; }
.load {
background: url(https://dl.dropboxusercontent.com/u/23834858/fotos/loader.gif) no-repeat center center #002e4e;
padding: 0;
margin: 0; }
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