:root {
    --background_color_one: #fff;
    --background_color_two: #F2F4F6;

    --border_color: #D6E3F0;

    --highlight_color: #fff;

    --text_color_one: #5C6163;
    --text_color_two: #24282A;
    --text_color_three: #939FA4;
    --text_color_four: #A7B0B4;
    --text_color_five: #F799A6;
}

html, body {
    height: 100%;
}

body {
    margin: 0;
    font-family: 'Titillium Web', sans-serif;
}

a {
    text-decoration: none;
    color: var(--highlight_color);
}

.wrapper {
    width: 100%;
    max-width: 90rem;
    min-width: 37.5rem;
    margin: 0 auto;
    background-color: var(--background_color_one);
    min-height: 10rem;
    border-left: 1px solid var(--border_color);
    border-right: 1px solid var(--border_color);
    box-sizing: border-box;
}

.inner {
    width: 100%;
    max-width: 78rem;
    margin: 0 auto;
    height: inherit;
}

.top_header {
    height: 3.25rem;
}

.top_header_inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    font-weight: 600;
}

.header_left {
    height: 2.5rem;
    line-height: 2rem;
    display: flex;
    align-content: center;
}

.logo {
    width: 2rem;
}

.header_left span {
    margin-left: 0.5rem;
}

.header_left .date {
    background-color: #BEFBE1;
    height: 2.125rem;
    padding-left: 1rem;
    padding-right: 1rem;
}

.header_right {
    display: flex;
    align-items: stretch;
    line-height: 2.5rem;
}

.button {
    height: 2.5rem;
    background: #353558;
    padding-left: 1rem;
    padding-right: 1rem;
    border-radius: 55px;
    margin-left: 0.5rem;
    display: flex;
    align-content: center;
}

.button img {
    width: 1.2rem;
}

.button span {
    color: #fff;
    margin-left: 0.2rem;
}


.main_header {
    min-height: 51.4375rem;
    background-color: #fff;
    background-image: url(img/banner_bg2.jpg);
    background-size: cover;
    background-position: center;
    margin-top: -3.25rem;
}

.main_header_inner {
    text-align: center;
}

.main_logo img {
    width: 17.5rem;
    margin-top: 10rem;
}

.main_title {
    font-size: 3.5rem;
    color: #fff;
    margin-top: 1rem;
}
.main_title span {
    font-weight: 600;
}

.intro {
    font-size: 1.5rem;
    color: #fff;
    margin-top: 1rem;
}

.cfp {
    display: inline-block;
    background: blue;
    border-radius: 50px;
    font-size: 1.5rem;
    width: 14.75rem;
    line-height: 3.5rem;
    color: #fff;
    margin-top: 2rem;
    margin-right: 0.1rem;
}

.tickets {
    display: inline-block;
    background: #ED1A3B;
    border-radius: 50px;
    font-size: 1.5rem;
    width: 14.75rem;
    line-height: 3.5rem;
    color: #fff;
    margin-top: 2rem;
    margin-left: 0.1rem;
}

.location {
    background-color: #353558;
    color: #fff;
}

.location_header_inner {
    /*display: flex;*/
    justify-content: space-between;
    align-items: center;
    padding-top: 2.75rem;
    padding-bottom: 2.75rem;
}

.address {
    margin-left: 1.5rem;
    padding-right: 1.5rem;
}

.location_header_inner .address div {
    margin-top: 0.5rem;
}

.talks {
    font-size: 1.5rem;
}

.building {
    font-size: 1.5rem;
    font-weight: 600;
}

.road {
    font-size: 1.25rem;
}

.location .map {
    width: 25rem;
    height: 14rem; 
    padding-right: 1rem;
}

main {
    text-align: center;
    margin-top: 3.5rem;
}

.sponsors > div {
    font-size: 1.5rem;
    padding-top: 0.5rem;
    padding-bottom: 0.5rem;
}

.sponsors .caption {
    font-size: 1.5rem;
    padding-bottom: 1rem;
}

.sponsors .header img {
    max-width: 70%
}

.entity {
	display: flex;
	align-items: center;
	justify-content: center;
	flex-wrap: wrap;
}

.sponsors .entity a {
    display: block;
    padding: 3rem;
}

.sponsors .diamond .entity a {
    padding: 0.8rem;
}

.sponsors img {
    width: 100%;
}

.sponsors .super .entity a {
    width: 40%;
}

.sponsors .diamond .entity a {
    width: 33%;
}

.sponsors .gold .entity a {
    width: 28%;
}

.sponsors .silver .entity a {
    width: 20%;
}

.sponsors .ordinary .entity a {
    width: 14%;
}

.coworkers {
    background-color: #F7FBFE;    
    font-weight: 600;
    padding-top: 2rem;
    padding-bottom: 2rem;
}

.coworkers img {
    width: 100%;
}

.coworkers .header {
    font-size: 1.5rem;
}

.coworkers .entity a {
    display: block;
    padding: 2rem;
}

.coworkers .host .entity a {
    width: 30%;
}

.coworkers .community .entity a {
    width: 22%;
}

.coworkers .entity a {
    width: 15%;
}

.coorgnizers > div {
    padding-top: 0.6rem;
    padding-bottom: 0.6rem;
}

.footer {
    background-color: #353558;
    height: 5.5rem;
}

.footer .inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.875rem;
    color: #FFF;
}

.footer .start {
    display: flex;
    align-items: center;
    padding-left: 1rem;
}

.footer .start .logo {
    width: 3rem;
}

.footer .start span {
    margin-left: 1.5rem;
}

.footer .end a {
    margin-right: 0.75rem;
}

.footer .end {
    padding-right: 1rem;
}

.schedule {
    text-align: left;
    padding-top: 2rem;
    padding-bottom: 2rem;
}

.schedule .date {
    font-weight: 600;
    font-size: 32px;
    padding-top: 2rem;
    padding-bottom: 2rem;
}

.schedule_header {
    min-height: 12.625rem;
    background-color: #fff;
    background-image: url(img/banner_bg2.jpg);
    background-size: cover;
    margin-top: -3.25rem;
    color: #353558;
}

.schedule_header_inner {
    text-align: left;
}

.schedule_header_inner .title {
    font-weight: 600;
    font-size: 3rem;   
    padding-top: 6rem;
}

.schedule_content {
    color: #353558;
    display: grid;
    grid-template-columns: 4rem 4rem auto;
    grid-gap: 1.5rem 1.5rem;
    align-items: center;
}

.schedule_content .time {
    font-size: 1rem;
}

.schedule_content .title {
    font-weight: 600;
    font-size: 1.25rem;
}

.schedule_content .detail {
    font-size: 1rem;
}

.detail a, .links a {
    text-decoration: none;
    color: blue;
}