/*! HTML5 Boilerplate v6.0.1 | MIT License | https://html5boilerplate.com/ */

/*
 * What follows is the result of much research on cross-browser styling.
 * Credit left inline and big thanks to Nicolas Gallagher, Jonathan Neal,
 * Kroc Camen, and the H5BP dev community and team.
 */

/* ==========================================================================
   Base styles: opinionated defaults
   ========================================================================== */

html {
    color: #222;
    font-size: 1em;
    line-height: 1.4;
}

/*
 * Remove text-shadow in selection highlight:
 * https://twitter.com/miketaylr/status/12228805301
 *
 * Vendor-prefixed and regular ::selection selectors cannot be combined:
 * https://stackoverflow.com/a/16982510/7133471
 *
 * Customize the background color to match your design.
 */

::-moz-selection {
    background: #b3d4fc;
    text-shadow: none;
}

::selection {
    background: #b3d4fc;
    text-shadow: none;
}

/*
 * A better looking default horizontal rule
 */

hr {
    display: block;
    height: 1px;
    border: 0;
    border-top: 1px solid #ccc;
    margin: 1em 0;
    padding: 0;
}

/*
 * Remove the gap between audio, canvas, iframes,
 * images, videos and the bottom of their containers:
 * https://github.com/h5bp/html5-boilerplate/issues/440
 */

audio, canvas, iframe, img, svg, video {
    vertical-align: middle;
}

/*
 * Remove default fieldset styles.
 */

fieldset {
    border: 0;
    margin: 0;
    padding: 0;
}

/*
 * Allow only vertical resizing of textareas.
 */

textarea {
    resize: vertical;
}

/* ==========================================================================
   Browser Upgrade Prompt
   ========================================================================== */

.browserupgrade {
    margin: 0.2em 0;
    background: #ccc;
    color: #000;
    padding: 0.2em 0;
}

/* ==========================================================================
   Author's custom styles
   ========================================================================== */

/* ==========================================================================
   Helper classes
   ========================================================================== */

/*
 * Hide visually and from screen readers
 */

.hidden {
    display: none !important;
}

/*
 * Hide only visually, but have it available for screen readers:
 * https://snook.ca/archives/html_and_css/hiding-content-for-accessibility
 *
 * 1. For long content, line feeds are not interpreted as spaces and small width
 *    causes content to wrap 1 word per line:
 *    https://medium.com/@jessebeach/beware-smushed-off-screen-accessible-text-5952a4c2cbfe
 */

.visuallyhidden {
    border: 0;
    clip: rect(0 0 0 0);
    -webkit-clip-path: inset(50%);
    clip-path: inset(50%);
    height: 1px;
    margin: -1px;
    overflow: hidden;
    padding: 0;
    position: absolute;
    width: 1px;
    white-space: nowrap;
    /* 1 */
}

/*
 * Extends the .visuallyhidden class to allow the element
 * to be focusable when navigated to via the keyboard:
 * https://www.drupal.org/node/897638
 */

.visuallyhidden.focusable:active, .visuallyhidden.focusable:focus {
    clip: auto;
    -webkit-clip-path: none;
    clip-path: none;
    height: auto;
    margin: 0;
    overflow: visible;
    position: static;
    width: auto;
    white-space: inherit;
}

/*
 * Hide visually and from screen readers, but maintain layout
 */

.invisible {
    visibility: hidden;
}

/*
 * Clearfix: contain floats
 *
 * For modern browsers
 * 1. The space content is one way to avoid an Opera bug when the
 *    `contenteditable` attribute is included anywhere else in the document.
 *    Otherwise it causes space to appear at the top and bottom of elements
 *    that receive the `clearfix` class.
 * 2. The use of `table` rather than `block` is only necessary if using
 *    `:before` to contain the top-margins of child elements.
 */

.clearfix:before, .clearfix:after {
    content: " ";
    /* 1 */
    display: table;
    /* 2 */
}

.clearfix:after {
    clear: both;
}

/* ==========================================================================
   EXAMPLE Media Queries for Responsive Design.
   These examples override the primary ('mobile first') styles.
   Modify as content requires.
   ========================================================================== */

@media only screen and (min-width: 35em) {
    /* Style adjustments for viewports that meet the condition */
}

@media print, (-webkit-min-device-pixel-ratio: 1.25), (min-resolution: 1.25dppx), (min-resolution: 120dpi) {
    /* Style adjustments for high resolution devices */
}

/* ==========================================================================
   Print styles.
   Inlined to avoid the additional HTTP request:
   http://www.phpied.com/delay-loading-your-print-css/
   ========================================================================== */

@media print {
    *, *:before, *:after {
        background: transparent !important;
        color: #000 !important;
        /* Black prints faster:
                                   http://www.sanbeiji.com/archives/953 */
        box-shadow: none !important;
        text-shadow: none !important;
    }
    a, a:visited {
        text-decoration: underline;
    }
    a[href]:after {
        content: " (" attr(href) ")";
    }
    abbr[title]:after {
        content: " (" attr(title) ")";
    }
    /*
     * Don't show links that are fragment identifiers,
     * or use the `javascript:` pseudo protocol
     */
    a[href^="#"]:after, a[href^="javascript:"]:after {
        content: "";
    }
    pre {
        white-space: pre-wrap !important;
    }
    pre, blockquote {
        border: 1px solid #999;
        page-break-inside: avoid;
    }
    /*
     * Printing Tables:
     * http://css-discuss.incutio.com/wiki/Printing_Tables
     */
    thead {
        display: table-header-group;
    }
    tr, img {
        page-break-inside: avoid;
    }
    p, h2, h3 {
        orphans: 3;
        widows: 3;
    }
    h2, h3 {
        page-break-after: avoid;
    }
}

/* 全局样式开始 =================================================================*/

html, body {
    height: 100%;
}

body {
    font-size: 15px;
    line-height: 1.50;
    color: #333;
    background-color: #fff;
    position: relative;
}

a:hover {
    text-decoration: none;
}

section {
    background-color: #ffffff;
    padding: 80px 0;
    margin: 0;
}

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

/* 全局样式结束 =================================================================*/

/* 头部样式开始 =================================================================*/

header {
    color: #fff;
    background-color: rgba(0, 0, 0, 0.5);
    padding: 10px 0;
}

.logo {
    float: left;
    margin: 10px 10px 10px 0;
}

.site-name {
    font-size: 36px;
    transition: all 0.3s ease-in-out;
}

.site-name a {
    color: #fff;
}

.site-slogan {
    font-size: 12px;
}

header .col-md-8 {
    margin-top: 15px;
}

.navbar-default {
    background-color: transparent;
    border: none;
}

.navbar-default .navbar-nav>li>a {
    color: #fff;
    font-size: 18px;
}

.navbar-default .navbar-nav>li.active>a:hover, .navbar-default .navbar-nav>li>a:hover {
    color: #55ACEE;
}

.navbar-default .navbar-nav>li.active>a {
    background-color: transparent;
    color: #55ACEE;
}

.navbar-default .navbar-nav>.active>a:hover {
    background-color: transparent;
}

.fixed-header-on header {
    height: 70px;
    background-color: rgba(0, 0, 0, 0.95);
    padding: 5px 0;
}

.fixed-header-on .logo {
    transform: scale(0.8);
    margin: 0;
}

.fixed-header-on .site-name {
    font-size: 24px;
}

.fixed-header-on .site-slogan {
    font-size: 12px;
}

.fixed-header-on .col-md-8 {
    margin-top: 5px;
}

/* 头部样式结束 =================================================================*/

/* 首页样式开始 =================================================================*/

.index {
    height: 100%;
}

.index h3, .index p {
    color: #fff;
    font-size: 24px;
}

.index h1 {
    color: #55ACEE;
    font-size: 60px;
    font-weight: 700;
}

.index::after {
    position: absolute;
    left: 0;
    top: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    content: '';
}

.index .catpion {
    z-index: 1;
    position: absolute;
    top: 35%;
    width: 100%;
}

/* 首页样式结束 =================================================================*/

/* 关于样式开始 =================================================================*/

.space {
    padding: 20px 0;
}

.about .list-unstyled li {
    padding: 5px 0;
}

.about .list-unstyled li i {
    color: #55ACEE;
}

.panel-default>.panel-heading {
    padding: 0;
}

.panel-default>.panel-heading a {
    display: inline-block;
    width: 100%;
    background-color: #55ACEE;
    color: #fff;
    position: relative;
    text-decoration: none;
    padding: 12px 15px;
}

.panel-default>.panel-heading a::after {
    font-family: "fontawesome";
    content: '\f147';
    position: absolute;
    right: 15px;
    font-size: 14px;
    top: 35%;
}

.panel-default>.panel-heading a.collapsed {
    background-color: #333;
}

.panel-default>.panel-heading a.collapsed::after {
    content: '\f196';
}

.panel-default>.panel-heading a:hover {
    background-color: #55ACEE;
}

.object-non-visiable {
    opacity: 0;
}

.object-visiable {
    opacity: 1;
}

/* 关于样式结束 =================================================================*/

/* 服务样式开始 =================================================================*/

.service {
    position: relative;
    background: url("../img/02.jpg")
}

.service::after {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    width: 100%;
    height: 100%;
    content: '';
    background-color: rgba(98, 165, 216, 0.7);
}

.service {
    color: #fff;
    font-weight: 600px;
}

.service .container {
    position: relative;
    z-index: 1;
}

.service h1 {
    font-weight: 700;
}

.service i {
    color: #fff;
    transform: scale(0.8);
}

/* 服务样式结束 =================================================================*/

/* 一起学习样式开始=================================================================*/

.togther {
    background-color: #55ACEE;
    padding: 15px 0;
}

.togther h1 {
    color: #fff;
}

/* 一起学习样式结束 =================================================================*/

/* 图集样式开始 =================================================================*/

.filter li {
    float: none;
    display: inline-block;
}

.overlay-container {
    position: relative;
}

.overlay {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: rgba(98, 165, 216, 0.7);
    cursor: pointer;
    transform: scale(0.8);
    transition: all 0.2s;
    opacity: 0;
}

.overlay i {
    position: absolute;
    left: 45%;
    top: 40%;
    font-size: 18px;
    color: #fff;
}

.overlay span {
    position: absolute;
    bottom: 10px;
    font-size: 13px;
    color: #fff;
    text-align: center;
    width: 100%;
}

.overlay-container:hover .overlay {
    opacity: 1;
    transform: scale(1);
}

.modal-header {
    background-color: #55ACEE;
    color: #fff;
}

.modal-header .close {
    color: #fff;
    opacity: 1;
}

/* 图集样式结束 =================================================================*/

/* 认证样式开始 =================================================================*/

.authentication {
    position: relative;
    background: url('../img/bg-image-2.jpg') no-repeat center center;
    background-size: cover;
}

.authentication::after {
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    width: 100%;
    height: 100%;
    content: '';
    background-color: rgba(0, 0, 0, 0.5);
}

.authentication {
    color: #fff;
    font-weight: 400;
    padding-bottom: 150px;
}

.authentication .container {
    position: relative;
    z-index: 1;
}

.authentication h1 {
    font-size: 36px;
    font-weight: 900;
    padding: 60px 0 25px;
}

.authentication .media-left {
    width: 60px;
    display: block;
    float: left;
}

blockquote {
    border-left: none;
    padding-left: 0px;
}

blockquote footer {
    color: #ccc;
}

.ad {
    position: absolute;
    bottom: 0;
    width: 100%;
    background-color: rgba(98, 165, 216, 0.7);
    padding: 20px 0;
}

.happy {
    background-color: rgb(0, 0, 0);
    padding: 20px 0;
}

.happy h1 {
    color: #fff;
    font-weight: 700;
}

/* 认证样式结束 =================================================================*/

/* 联系我们开始 =================================================================*/

.contact .row {
    font-size: 18px;
}

.contact ul {
    list-style: none;
    padding: 0;
}

.contact ul li {
    margin: 20px 0;
}

.contact .links li {
    float: left;
    font-size: 36px;
    margin: 15px 30px 15px 0;
}

.contact .links li a {
    color: #000;
}

.contact .links li.facebook a:hover {
    color: yellow;
}

.contact .links li.twitter a:hover {
    color: blue;
}

.contact span {
    margin-top: 6px;
}

/* 联系我们结束 =================================================================*/