/* ---- reset ---- */
body {
    margin: 0;
    font: normal 75% Arial, Helvetica, sans-serif;
}

canvas {
    display: block;
    vertical-align: bottom;
}

/* ---- tsparticles container ---- */
#tsparticles {
    position: absolute;
    width: 100%;
    height: 100%;
    background-color: #0d47a1;
    /*background-image: url("");*/
    background-repeat: no-repeat;
    background-size: cover;
    background-position: 50% 50%;
}

.vertical-center {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 95vh; /* 使容器高度占满整个视口 */
}

.bg1 {
    background-color: #1e2022;
}

.bg2 {
    color: #52616b;
}

.bg3 {
    background-color: #c9d6df;
}

.bg4 {
    background-color: #f0f5f9;
}

@keyframes blink {
    0% {
        opacity: 1;
    }
    25% {
        opacity: 1;
    }
    50% {
        opacity: 0;
    }
    75% {
        opacity: 1;
    }
    100% {
        opacity: 1;
    }
}

.blink {
    animation: blink 3s infinite;
}

.z-index-1 {
    z-index: 1;
}

.z-index-0 {
    z-index: 0;
}

.glowing-text {
    color: white;
    letter-spacing: 6vw;
    text-shadow: 0px 0px 20px #fff;
    font-weight: bold;
}

.full-screen-text {
    font-size: 6vw;
}

#picbar {
    -webkit-column-width: calc(100vw / 4); /*Safari and Chrome*/
    -moz-column-width: calc(100vw / 4); /*Firefox*/
    -o-column-width: calc(100vw / 4); /*Opera*/
    -ms-column-width: calc(100vw / 4); /*IE*/
    column-width: calc(100vw / 4);
}

#picbar > div {
    width: calc(100vw / 4); /*宽度根据实际情况调节，应与上面一致*/
    overflow: auto; /*防止内容溢出导致布局错位*/
}