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;
}
/* HTML5 display-role reset for older browsers  */

article, aside, details, figcaption, figure, footer, header, hgroup, menu, nav, section {
    display: block;
}
body {
    line-height: 1;
}
img {
	max-width:100%;
}
.sec {
	max-width: 750px;
	margin: 0 auto;
}
.sec img {
	vertical-align: bottom;
}
.btn {
	width: 90%;
	margin: 0 auto 30px;
	display: block;
}
/*
@media の外に記述したスタイルは、全サイズで読み込まれます。
*/

@media screen and (max-width: 640px) {
    /*SP　画面サイズが480px以下の場合、ここのスタイルを読み込む　*/
    body {
    }
    
}