* {
    box-sizing: border-box
}

body {
    margin: 0;
    font-family: Arial, "Microsoft YaHei", sans-serif;
    background: #fff url(../images/background_image.png) repeat;
    color: #222
}

html {
    scroll-behavior: smooth
}

a {
    text-decoration: none;
    color: inherit
}

.wrap {
    width: 100%;
    max-width: 100%;
    margin-left: auto;
    margin-right: auto;
    padding-left: 15px;
    padding-right: 15px;
    background-color: #fff
}

.top {
    padding: 12px 0 0
}

.site-header {
    margin: 0
}

.header-banner-wrap {
    width: 100%;
    padding: 8px 0 14px;
    background: #fff
}

.header-banner {
    display: flex;
    flex-wrap: nowrap;
    align-items: center;
    gap: clamp(14px, 2.2vw, 32px);
    width: 100%
}

.header-title-col {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: 2px;
    text-align: left
}

.eng-subrow {
    display: flex;
    flex-wrap: nowrap;
    align-items: center;
    justify-content: flex-start;
    gap: 4px 10px;
    width: 100%;
    min-width: 0
}

.eng {
    margin: 0;
    font-weight: 600;
    color: #2c3333;
    line-height: 1.22
}

.eng-l1 {
    font-size: clamp(13px, 1.55vw, 20px)
}

.eng-l2 {
    font-size: clamp(13px, 1.55vw, 20px);
    flex: 0 1 auto;
    min-width: 0;
    max-width: 100%
}

.logo {
    width: 124px;
    height: auto;
    max-height: 120px;
    display: block;
    flex: 0 0 auto;
    object-fit: contain
}

.icons {
    flex-shrink: 0;
    display: flex;
    align-items: center
}

.icons img {
    display: block;
    height: auto;
    width: min(270px, 36vw);
    max-width: 100%
}

.year {
    font-size: clamp(44px, 6vw, 82px);
    font-weight: 900;
    line-height: 1;
    color: #2c3333;
    letter-spacing: -0.03em;
    flex-shrink: 0
}

.titlename {
    text-align: center;
    margin-top: 8px;
    margin-bottom: 10px;
    padding: 0 4px
}

.titlename .titlename-line {
    margin: 0 0 10px;
    font-weight: 700;
    line-height: 1.35;
    font-size: clamp(15px, 1.75vw, 19px)
}

.titlename-lead {
    color: #31708f
}

.titlename-zh {
    display: block;
    font-size: clamp(14px, 1.45vw, 18px);
    color: #385e86;
    font-weight: 700
}

.titlename-meta {
    color: #333;
    font-size: clamp(14px, 1.55vw, 19px)
}

.header-date {
    color: #c00000
}

.header-venue {
    color: #00f
}

.gallery {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    padding: 14px 10px 36px
}

.slide {
    position: relative;
    height: 245px;
    border-radius: 6px;
    overflow: hidden;
    box-shadow: 0 3px 10px rgba(0, 0, 0, .12)
}

.slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block
}

.overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, .22), rgba(0, 0, 0, .04) 35%, rgba(0, 0, 0, .06))
}

.arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    font-size: 54px;
    color: rgba(255, 255, 255, .85);
    font-weight: 300;
    line-height: 1
}

.arrow.left {
    left: 14px
}

.arrow.right {
    right: 14px
}

.dots {
    position: absolute;
    left: 50%;
    bottom: 16px;
    transform: translateX(-50%);
    display: flex;
    gap: 8px
}

.dots span {
    width: 11px;
    height: 11px;
    border: 2px solid #fff;
    border-radius: 50%;
    background: transparent
}

.dots span.on {
    background: #fff
}

.divider {
    height: 3px;
    background: #0563c1;
    border: 0;
    margin: 8px 0 26px
}

.content {
    display: grid;
    grid-template-columns: 170px 1fr;
    gap: 32px;
    padding-bottom: 40px
}

.sidebar {
    border-top: 4px solid #2f76b7
}

.menu {
    border: 1px solid #c8d8e8
}

.menu a {
    display: block;
    padding: 11px 12px;
    background: #d8ebf7;
    border-bottom: 1px solid #c5d7e6;
    color: #32536f;
    font-size: 14px;
    line-height: 1.35
}

.menu a.active {
    background: #675aa9;
    color: #fff;
    font-weight: 700;
    position: relative
}

.menu a.active:after {
    content: "";
    position: absolute;
    right: -12px;
    top: 0;
    border-top: 22px solid transparent;
    border-bottom: 22px solid transparent;
    border-left: 12px solid #675aa9
}

.main {
    border-top: 4px solid #2f76b7;
    padding-top: 10px
}

.panel {
    display: none;
    padding: 16px 8px 24px;
    border-bottom: 1px solid #d7d7d7
}

.panel.active {
    display: block
}

.panel:last-child {
    border-bottom: 0
}

.content-panel {
    display: none
}

.content-panel.active {
    display: block
}

.welcome {
    font-size: 28px;
    color: #118119;
    text-align: center;
    font-weight: 700;
    margin: 10px 0 18px
}

.line-title {
    border-top: 3px solid #8c8c8c;
    border-bottom: 3px solid #8c8c8c;
    text-align: center;
    padding: 12px 10px;
    margin: 0 0 20px
}

.line-title .small {
    display: block;
    font-size: 26px;
    color: #6b96c8;
    font-weight: 700;
    line-height: 1.2
}

.line-title .big {
    display: block;
    font-size: 26px;
    color: #1339ff;
    font-weight: 800;
    line-height: 1.2;
    margin-top: 6px
}

.placeholder {
    border: 1px dashed #b9c8d8;
    background: #f8fbff;
    border-radius: 4px;
    padding: 18px 16px;
    margin: 14px 0
}

.placeholder h3 {
    margin: 0 0 10px;
    font-size: 20px;
    color: #234b7c
}

.placeholder p {
    margin: 0;
    color: #7a8694;
    line-height: 1.8
}

.dates-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px
}

.dates-table td,
.dates-table th {
    border-bottom: 1px solid #e5e5e5;
    padding: 12px 10px;
    text-align: left;
    vertical-align: top
}

.dates-table th {
    width: 48%;
    font-weight: 700
}

.submit-link {
    font-size: 18px;
    color: #4a7fb3;
    font-weight: 700;
    margin-top: 18px
}

.sponsors {
    padding: 26px 0 34px;
    width: 100%;
    overflow: hidden
}

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

.sponsor-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 18px
}

.slogo {
    height: 92px;
    border: 1px solid #d8e1ea;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #6d87a2;
    background: #fafcff;
    font-weight: 700;
    text-align: center;
    padding: 10px
}

.foot {
    text-align: center;
    color: #666;
    font-size: 13px;
    padding: 6px 0 30px;
    clear: both
}

@media(min-width:768px) {
    .wrap {
        max-width: 750px
    }
}

@media(min-width:992px) {
    .wrap {
        max-width: 970px
    }
}

@media(min-width:1200px) {
    .wrap {
        max-width: 1170px
    }
}

@media(max-width:980px) {
    .year {
        font-size: clamp(52px, 9vw, 70px)
    }

    .header-banner {
        flex-wrap: wrap;
        row-gap: 12px
    }

    .eng-subrow {
        flex-wrap: wrap
    }

    .icons img {
        width: min(240px, 48vw)
    }

    .titlename .titlename-line {
        font-size: clamp(14px, 1.9vw, 17px)
    }

    .gallery,
    .sponsor-grid,
    .content {
        grid-template-columns: 1fr
    }

    .slide {
        height: 260px
    }
}

@media(max-width:700px) {
    .header-banner {
        flex-direction: column;
        align-items: center;
        text-align: center
    }

    .header-title-col {
        align-items: center;
        text-align: center;
        width: 100%
    }

    .eng-subrow {
        justify-content: center
    }

    .icons {
        padding-top: 2px
    }

    .year {
        font-size: 58px
    }

    .titlename .titlename-line {
        font-size: 16px
    }

    .titlename-zh {
        font-size: 15px
    }
}