html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
b, u, i, center,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, embed, 
figure, figcaption, footer, header, hgroup, 
menu, nav, output, ruby, section, summary,
time, mark, audio, video {
	margin: 0;
	padding: 0;
	border: 0;
	font-size: 100%;
	/* font: inherit; */
	vertical-align: baseline;
}

body {
    font-family: "Helvetica", "Arial", sans-serif;
}

body {
    line-height: 1.5;
}

body {
    color: #555;
}

body {
    color: #566b78;
}

header,
main {
    margin: 0 auto;
    max-width: 50em;
}






  
h2 {
    margin-top: 1em;
    padding-top: 1em;
}



h1,
h2,
strong {
  color: #333;
}

code,
pre {
  background: #eee;
}

code {
    padding: 2px 4px;
    vertical-align: text-bottom;
}

pre {
    padding: 1em;
}

a {
    color: #e81c4f;
}



code,
pre {
  background: #f5f7f9;
  border-bottom: 1px solid #d8dee9;
  color: #a7adba;
}

pre {
    border-left: 2px solid #69c;
}





main {
    padding: 4em 1em;
}
  
header {
    background-color: #263d36;
    background-image: url("header.jpg");
    background-position: center top;
    background-repeat: no-repeat;
    background-size: cover;
    line-height: 1.2;
    max-width: none;
    padding: 10vw 2em;
    text-align: center;
  }
  
header img {
    display: inline-block;
    height: 120px;
    vertical-align: top;
    width: 120px;
}
  
header h1 {
    color: white;
    font-size: 2.5em;
    font-weight: 300;
  }
  
header a {
    border: 1px solid #e81c4f;
    border-radius: 290486px;
    color: white;
    font-size: 0.6em;
    letter-spacing: 0.2em;
    padding: 1em 2em;
    text-transform: uppercase;
    text-decoration: none;
    transition: none 200ms ease-out;
    transition-property: color, background;
    display: inline-block;
}
  
header a:hover {
    background: #e81c4f;
    color: white;
}


.clearfix:after {
    content: ".";
    display: block;
    height: 0;
    clear: both;
    visibility: hidden;
}
.clearfix {
    zoom: 1;/* triggers hasLayout */
}

　h2 {font-size:18px; border:1px solid blue; color:#000; background-color:#FFF;}