/* 首页 Banner：淡入淡出 + Ken Burns，不用 slick */
.ck-hero{
    position: relative;
    overflow: hidden;
    background: #0b1a2c;
}
.ck-hero-list{
    position: relative;
    margin: 0;
    padding: 0;
    list-style: none;
}
.ck-hero .ys-ban-li{
    display: block !important;
    position: absolute;
    inset: 0;
    opacity: 0;
    visibility: hidden;
    z-index: 0;
    transition: opacity .85s ease, visibility .85s ease;
}
.ck-hero:not(.is-ready) .ys-ban-li:first-child,
.ck-hero .ys-ban-li.is-active{
    position: relative;
    opacity: 1;
    visibility: visible;
    z-index: 1;
}
.ck-hero .ys-ban-imgbox,
.ck-hero .ys-banner-wai,
.ck-hero .ys-banner-add{
    height: 100%;
}
.ck-hero .ys-ban-imgbox img.ys-ban-pc,
.ck-hero .ys-ban-imgbox video{
    width: 100%;
    height: min(78vh, 820px);
    object-fit: cover;
    transform: scale(1.08);
    transition: transform 6.5s ease-out;
}
.ck-hero .ys-ban-li.is-active .ys-ban-imgbox img.ys-ban-pc,
.ck-hero .ys-ban-li.is-active .ys-ban-imgbox video{
    transform: scale(1);
}
.ck-hero .ys-ban-title,
.ck-hero .ys-ban-txtbox .std-btn2,
.ck-hero .ys-ban-txtbox .std-btn1{
    opacity: 0;
    transform: translateY(18px);
    transition: opacity .55s ease .2s, transform .55s ease .2s;
}
.ck-hero .ys-ban-li.is-active .ys-ban-title,
.ck-hero .ys-ban-li.is-active .ys-ban-txtbox .std-btn2,
.ck-hero .ys-ban-li.is-active .ys-ban-txtbox .std-btn1{
    opacity: 1;
    transform: none;
}
.ck-hero-ui{
    position: absolute;
    right: 36px;
    bottom: 48px;
    z-index: 6;
    display: flex;
    align-items: center;
    gap: 10px;
}
.ck-hero-arrow{
    width: 42px;
    height: 42px;
    border: 1px solid rgba(255,255,255,.55);
    border-radius: 4px;
    background: rgba(11,26,44,.28);
    color: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}
.ck-hero-arrow svg{
    width: 16px;
    height: 16px;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.8;
    stroke-linecap: round;
    stroke-linejoin: round;
}
.ck-hero-arrow:hover{
    background: #1a4d8c;
    border-color: #1a4d8c;
}
.ck-hero-dots{
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-left: 8px;
}
.ck-hero-dots button{
    position: relative;
    width: 3px;
    height: 22px;
    padding: 0;
    border: 0;
    background: rgba(255,255,255,.32);
    cursor: pointer;
    overflow: hidden;
}
.ck-hero-dots button.is-on{
    height: 42px;
    background: rgba(255,255,255,.22);
}
.ck-hero-dots button.is-on::after{
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 0;
    background: #fff;
    animation: ckHeroBar 5s linear forwards;
}
.ck-hero.is-paused .ck-hero-dots button.is-on::after{
    animation-play-state: paused;
}
@keyframes ckHeroBar{
    from { height: 0; }
    to { height: 100%; }
}
/* 滚动提示：圆框 + 下箭头，替代原站鼠标图标 */
.ck-hero .ck-scroll-hint .mouse_screen_icon{
    width: 36px;
    height: 36px;
    color: #fff;
}
.ck-hero .ck-scroll-hint .mouse_screen_icon svg{
    display: block;
    width: 100%;
    height: 100%;
}

@media (max-width: 991px){
    .ck-hero .ys-ban-imgbox img.ys-ban-pc,
    .ck-hero .ys-ban-imgbox video{
        height: 56vh;
    }
    .ck-hero-ui{
        right: 16px;
        bottom: 24px;
    }
}