@charset "UTF-8";

/* Reset default style */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    line-height: 1.7;
    color: #24292e;
    background-color: #f6f8fa;
}


h1,
h2,
h3,
h4,
h5,
h6 {
    color: #24292e;
    line-height: 1.3;
    font-weight: 600;
}

p {
    font-size: 14px;
    line-height: 1.5;
    color: #586069;
}

a {
    text-decoration: none;
    color: #0366d6;
    font-size: 14px;
    font-weight: 600;
    transition: color 0.3s;
}

a:hover,
a:focus {
    color: #005cc5;
    outline: 0 solid transparent;
}

ul,
ol {
    padding: 0;
}

ul li,
ol li {
    list-style: none;
}

img {
    height: auto;
    max-width: 100%;
}

.header-area {
    position: sticky;
    padding-top: 10px;
    z-index: 1000;
    top: 0;
    width: 100%;
    height: 70px !important;
    padding: 15px;
    background-color: #24292e;
    box-shadow: 0 0px 8px 0 rgba(0, 0, 0, 0.12), 0 2px 4px 0 rgba(0, 0, 0, 0.24);
}

/* introduce menus */
.introduce-menus {
    float: left;
    width: 200px;
    font-size: 14px;
    margin-top: 10px;
    margin-right: 50px;
}

.introduce-paper {
    margin-top: 20px;
}

.introduce-img {
    width: 100%;
    max-height: 250px;
    margin-top: 20px;
    margin-bottom: 20px;
    object-fit: cover;
}

.introduce-item {
    margin-left: 220px;
    border: 1px solid #e1e4e8;
    padding: 20px;
    background-color: #fff;
    border-radius: 6px;
    box-shadow: 0 1px 0 0 #e1e4e8, 0 3px 6px 0 rgba(0, 0, 0, 0.15);
}

.news-bar {
    height: 30px;
    background-color: #f6f8fa;
}