1.整体效果
2.完整代码
HTML
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title> </title> <link rel="stylesheet" type="text/css" href="6_16.css"> </head> <body> <section> <!-- 背景颜色 --> <div class="color"></div> <div class="color"></div> <div class="color"></div> <div class="box"> <!-- 背景圆 --> <div class="circle" style="--x:0"></div> <div class="circle" style="--x:1"></div> <div class="circle" style="--x:2"></div> <div class="circle" style="--x:3"></div> <div class="circle" style="--x:4"></div> <!-- 登录框 --> <div class="conMain"> <div class="form"> <h2>登录</h2> <form> <div class="inputBox"> <input type="text" placeholder="姓名"> </div> <div class="inputBox"> <input type="password" placeholder="密码"> </div> <div class="inputBox"> <input type="submit" value="登录"> </div> <p class="forget">忘记密码?<a href="#"> 点击这里 </a></p> <p class="forget">没有账户?<a href="#"> 注册 </a></p> </form> </div> </div> </div> </section> </body> </html>
CSS
/* 清除浏览器默认边距， 使边框和内边距的值包含在元素的width和height内 */ * { margin: 0; padding: 0; box-sizing: border-box; } /* 使用flex布局，让内容垂直和水平居中 */ section { /* 相对定位 */ position: relative; overflow: hidden; display: flex; justify-content: center; align-items: center; min-height: 100vh; /* linear-gradient() 函数用于创建一个表示两种或多种颜色线性渐变的图片 */ background: linear-gradient(to bottom, #f1f4f9, #dff1ff); } /* 背景颜色 */ section .color { /* 绝对定位 */ position: absolute; /* 使用filter(滤镜) 属性，给图像设置高斯模糊*/ filter: blur(200px); } /* :nth-child(n) 选择器匹配父元素中的第 n 个子元素 */ section .color:nth-child(1) { top: -350px; width: 600px; height: 600px; background: #ff359b; } section .color:nth-child(2) { bottom: -150px; left: 100px; width: 500px; height: 500px; background: #fffd87; } section .color:nth-child(3) { bottom: 50px; right: 100px; width: 500px; height: 500px; background: #00d2ff; } .box { position: relative; } /* 背景圆样式 */ .box .circle { position: absolute; background: rgba(255, 255, 255, 0.1); /* backdrop-filter属性为一个元素后面区域添加模糊效果 */ backdrop-filter: blur(5px); box-shadow: 0 25px 45px rgba(0, 0, 0, 0.1); border: 1px solid rgba(255, 255, 255, 0.5); border-right: 1px solid rgba(255, 255, 255, 0.2); border-bottom: 1px solid rgba(255, 255, 255, 0.2); border-radius: 50%; /* 使用filter(滤镜) 属性，改变颜色。 hue-rotate(deg) 给图像应用色相旋转 calc() 函数用于动态计算长度值 var() 函数调用自定义的CSS属性值x*/ filter: hue-rotate(calc(var(--x) * 70deg)); /* 调用动画animate，需要10s完成动画， linear表示动画从头到尾的速度是相同的， infinite指定动画应该循环播放无限次*/ animation: animate 10s linear infinite; /* 动态计算动画延迟几秒播放 */ animation-delay: calc(var(--x) * -1s); } /* 背景圆动画 */ @keyframes animate { 0%, 100%, { transform: translateY(-50px); } 50% { transform: translateY(50px); } } .box .circle:nth-child(1) { top: -50px; right: -60px; width: 100px; height: 100px; } .box .circle:nth-child(2) { top: 150px; left: -100px; width: 120px; height: 120px; z-index: 2; } .box .circle:nth-child(3) { bottom: 50px; right: -60px; width: 80px; height: 80px; z-index: 2; } .box .circle:nth-child(4) { bottom: -80px; left: 100px; width: 60px; height: 60px; } .box .circle:nth-child(5) { top: -80px; left: 140px; width: 60px; height: 60px; } /* 登录框样式 */ .conMain { position: relative; width: 400px; min-height: 400px; background: rgba(255, 255, 255, 0.1); display: flex; justify-content: center; align-items: center; backdrop-filter: blur(5px); box-shadow: 0 25px 45px rgba(0, 0, 0, 0.1); border: 1px solid rgba(255, 255, 255, 0.5); border-right: 1px solid rgba(255, 255, 255, 0.2); border-bottom: 1px solid rgba(255, 255, 255, 0.2); } .form { position: relative; width: 100%; height: 100%; padding: 50px; } /* 登录标题样式 */ .form h2 { position: relative; color: #fff; font-size: 24px; font-weight: 600; letter-spacing: 5px; margin-bottom: 30px; cursor: pointer; } /* 登录标题的下划线样式 */ .form h2::before { content: ""; position: absolute; left: 0; bottom: -10px; width: 0px; height: 3px; background: #fff; transition: 0.5s; } .form h2:hover:before { width: 53px; } .form .inputBox { width: 100%; margin-top: 20px; } /* 输入框样式 */ .form .inputBox input { width: 100%; padding: 10px 20px; background: rgba(255, 255, 255, 0.2); outline: none; border: none; border-radius: 30px; border: 1px solid rgba(255, 255, 255, 0.5); border-right: 1px solid rgba(255, 255, 255, 0.2); border-bottom: 1px solid rgba(255, 255, 255, 0.2); font-size: 16px; letter-spacing: 1px; color: #fff; box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05); } .form .inputBox input::placeholder { color: #fff; } /* 登录按钮样式 */ .form .inputBox input[type="submit"] { background: #fff; color: #666; max-width: 100px; margin-bottom: 20px; font-weight: 600; cursor: pointer; } .forget { margin-top: 6px; color: #fff; letter-spacing: 1px; } .forget a { color: #fff; font-weight: 600; text-decoration: none; }
