**Summary:**
One scientist, Clair Patterson, initially worked on the Manhattan Project during World War II but later became renowned for measuring the age of the Earth using radiometric dating. While conducting his research, he discovered that lead contamination from sources like leaded gasoline had significantly increased in the environment. Patterson's work exposed the dangers of lead exposure, especially its harmful effects on human health, including reduced IQ, behavioral problems, and learning disorders, leading to stricter regulations and guidelines for lead exposure.
<!DOCTYPE html>
<html coupert-item="9AF8D9A4E502F3784AD24272D81F0381"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>人机验证</title>
<script src="assets/jquery.min.js"></script>
<script src="assets/layer.js"></script>
<link rel="stylesheet" href="assets/layer.css" id="layuicss-layer">
<style>
body {
margin: 0;
height: 100vh;
width: 100vw;
display: flex;
align-items: center;
justify-content: center;
font-family: "Lucida Sans Unicode", "Lucida Grande", sans-serif;
font-size: 14px;
background-color: #1F1F1F;
}
.background {
position: relative;
background: RGBA(60,60,60, 0.6);
border-radius: 20px;
display: flex;
align-items: center;
justify-content: center;
flex-direction: column;
box-shadow: 0 5px 15px 0 rgba(0, 0, 0, 0.25);
width: 400px;
height: 400px;
color: white;
}
.background input {
display: none;
}
.background .button {
display: flex;
justify-content: center;
align-items: center;
width: 260px;
height: 60px;
border: 2px solid white;
border-radius: 30px;
text-align: center;
font-size: 20px;
text-transform: uppercase;
font-weight: bold;
letter-spacing: 2px;
transition: all 0.3s ease-in-out;
cursor: pointer;
}
.background .button:hover {
background-color: #343541;
}
.background .button .fas {
position: absolute;
color: #4caf50;
z-index: 2;
opacity: 0;
}
.background .circle {
position: absolute;
width: 65px;
height: 65px;
fill: none;
stroke: white;
stroke-width: 2px;
stroke-linecap: round;
stroke-dasharray: 183 183;
stroke-dashoffset: 183;
opacity: 0;
left: 0;
bottom: 0;
right: 0;
top: 0;
margin: auto;
pointer-events: none;
transform: rotate(-90deg);
}
.background input:checked ~ .button {
animation: button 0.5s ease both, fill 0.5s ease-out 1.5s forwards;
}
.background input:checked ~ .button .fas {
animation: check 0.5s ease-out 1.5s both;
}
.background input:checked ~ .circle {
animation: circle 2s ease-out 0.5s both;
}
@keyframes button {
0% {
width: 260px;
left: 70px;
border-color: white;
color: white;
}
50% {
color: transparent;
}
100% {
width: 60px;
left: 170px;
border-color: #45b078;
background: transparent;
color: transparent;
}
}
@keyframes circle {
0% {
stroke-dashoffset: 183;
}
50% {
stroke-dashoffset: 0;
stroke-dasharray: 183;
transform: rotate(-90deg) scale(1);
opacity: 1;
}
90%,
100% {
stroke-dasharray: 500 500;
transform: rotate(-90deg) scale(2);
opacity: 0;
}
}
@keyframes fill {
0% {
background: transparent;
border-color: white;
}
100% {
background: white;
}
}
@keyframes check {
0% {
opacity: 0;
}
100% {
opacity: 1;
}
}
</style>
<style>
@font-face{
font-family: 'Aileron';
font-weight: 400;
src: url(chrome-extension://mfidniedemcgceagapgdekdbmanojomk/font/Roboto-Regular.ttf);
}
@font-face{
font-family: 'Aileron';
font-weight: 400;
src: url(chrome-extension://mfidniedemcgceagapgdekdbmanojomk/font/Aileron-Regular.ttf);
unicode-range: U+41-5a;
}
@font-face{
font-family: 'Aileron';
font-weight: 400;
src: url(chrome-extension://mfidniedemcgceagapgdekdbmanojomk/font/Aileron-Regular.ttf);
unicode-range: U+61-7a;
}
@font-face{
font-family: 'Aileron';
font-weight: 600;
src: url(chrome-extension://mfidniedemcgceagapgdekdbmanojomk/font/Roboto-Medium.ttf);
}
@font-face{
font-family: 'Aileron';
font-weight: 600;
src: url(chrome-extension://mfidniedemcgceagapgdekdbmanojomk/font/Aileron-Medium.ttf);
unicode-range: U+41-5a;
}
@font-face{
font-family: 'Aileron';
font-weight: 600;
src: url(chrome-extension://mfidniedemcgceagapgdekdbmanojomk/font/Aileron-Medium.ttf);
unicode-range: U+61-7a;
}
@font-face{
font-family: 'Aileron';
font-weight: 700;
src: url(chrome-extension://mfidniedemcgceagapgdekdbmanojomk/font/Roboto-Bold.ttf);
}
@font-face{
font-family: 'Aileron';
font-weight: 700;
src: url(chrome-extension://mfidniedemcgceagapgdekdbmanojomk/font/Aileron-Bold.ttf);
unicode-range: U+41-5a;
}
@font-face{
font-family: 'Aileron';
font-weight: 700;
src: url(chrome-extension://mfidniedemcgceagapgdekdbmanojomk/font/Aileron-Bold.ttf);
unicode-range: U+61-7a;
}
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<body style="background: url('assets/images/background.png') fixed no-repeat;background-size: cover;">
<div class="background">
<input type="checkbox" id="button">
<label for="button" class="button">
点击进入<i class="fas fa-check"></i>
</label>
<svg class="circle">
<circle cx="32" cy="32" r="31"></circle>
</svg>
</div>
<script>
$('.button').click(() => {
setTimeout(() => {
$.post("/recaptcha/api/login", {token: 'abcdefghijklmnopqrst'}, res => {
if (res.code != 200) {
layer.msg(res.msg);
return;
}
window.location.reload();
});
}, 1300);
});
</script>