.container {
    display: flex;
    height: 100%;
    width: 100%;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}

.container.HelloWord_Animation_0 {
    align-content: stretch;
    align-items: stretch;

}

.letter {
    text-align: center;
    color: black;
    font-size: 4vmax;
    font-weight: 400;
    display: flex;
    align-items: center;
    justify-content: center;
    will-change: width;
}

.container.HelloWord_Animation_0 .letter {
    color: white;
}

.container.HelloWord_Animation_1 .letter {
    color: black;
}

.background {
    position: absolute;
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    background-color: rgba(255, 255, 255, 1);
    z-index: -1;
    animation: pulse 4s ease-in-out;
    animation-fill-mode: forwards;
    transform-style: preserve-3d;
    perspective: 1000px;
    transform-origin: top left;
    transform: translateZ(0);
    will-change: transform, opacity;
    contain: layout paint;
    padding: 1em;
    border-radius: 16px;
    box-shadow: 10px 10px 15px rgba(0, 0, 0, 0.3);
}

.background_watch_cards {
    position: absolute;
    width: 100vw;
    height: 100vh;
    display: grid;
    grid-auto-flow: column;
    align-content: space-evenly;
    justify-content: space-evenly;
    align-items: center;
    justify-items: center;
    z-index: -1;
    opacity: 0;
    animation: pulse2 2s ease-in-out;
    animation-fill-mode: forwards;
    animation-delay: 4s;
    transform-style: preserve-3d;
    perspective: 1000px;
    transform: translateZ(0);
    will-change: opacity;
    contain: layout paint;
    transform: translate3d(-5vw, 0, 0) scale3d(2, 1.5, 1) rotate3d(0, 1, 1, 30deg);
}

.background_watch_cards_title {
    position: absolute;
    width: 100vw;
    height: 100vh;
    display: grid;
    grid-auto-flow: column;
    align-content: space-evenly;
    justify-content: space-evenly;
    align-items: center;
    justify-items: center;
}

.background_watch_cards_title>div {
    background-color: rgba(255, 255, 255, 1);
    box-shadow: 10px 10px 15px rgba(0, 0, 0, 0.3);
    padding: 1em;
    margin-left: 10vw;
    border-radius: 16px;
    z-index: -1;
    opacity: 0;
    animation: pulse2b 2s ease-in-out;
    animation-fill-mode: forwards;
    animation-delay: 4.2s;
    transform: translate3d(-5vw, 0, 0) scale3d(2, 1.5, 1) rotate3d(0, 1, 1, 30deg);
}

@media only screen and (max-width: 1152px) {
    .background_watch_cards_title>div {
        margin-left: 0;
    }
}

.background_watch_cards_a {
    height: 100vh;
    display: grid;
    align-content: space-evenly;
    justify-content: space-evenly;
    align-items: center;
    justify-items: center;
}

.background_watch_cards_a>img {
    height: 100vh;
    z-index: -1;
    margin: 1em;
}

.background_watch_cards_a>img

/*:nth-child(odd)*/
    {
    height: 20vh;
    opacity: 0;
    animation: pulse3a 4s ease-in-out;
    animation-fill-mode: forwards;
    transform-style: preserve-3d;
    perspective: 1000px;
    transform-origin: top left;
    transform: translateZ(0);
    will-change: transform, opacity;
    contain: layout paint;
    border-radius: 16px;
    box-shadow: 10px 10px 15px rgba(0, 0, 0, 0.3);
}

/*.background_watch_cards_a > img:nth-child(even) {
    width: 10vw;
    height: 20vh;
    opacity: 0;
    animation: pulse3b 1s ease-in-out;
    animation-fill-mode: forwards;
    transform-style: preserve-3d;
    perspective: 1000px;
    transform-origin: top left;
    transform: translateZ(0);
    will-change: transform, opacity;
    contain: layout paint;
    border-radius: 16px;
}*/
.background_watch_cards_a>img:nth-child(1) {
    animation-delay: 3.6s;
}

.background_watch_cards_a>img:nth-child(2) {
    animation-delay: 3.7s;
}

.background_watch_cards_a>img:nth-child(3) {
    animation-delay: 3.8s;
}

.background_watch_cards_a>img:nth-child(4) {
    animation-delay: 3.9s;
}

.background_watch_cards_a>img:nth-child(5) {
    animation-delay: 4.0s;
}

@keyframes pulse {
    0% {
        transform: translate3d(20vw, 0, 0) scale3d(16, 16, 1) rotate3d(0, 1, 1, 120deg);
    }

    30% {
        transform: translate3d(20vw, 20vw, 0) scale3d(8, 8, 1) rotate3d(0, 1, 1, 60deg);
    }

    50% {
        transform: translate3d(50vw, 50vh, 0) scale3d(1, 0.5, 1) rotate3d(0, 1, 1, 30deg);
    }

    80% {
        opacity: 1;
        transform: translate3d(50vw, 50vh, 0) scale3d(1, 0.5, 1) rotate3d(0, 1, 1, 30deg);
    }

    100% {
        opacity: 0;
        transform: translate3d(-20vw, -100vh, 0) scale3d(3, 2.5, 1) rotate3d(0, 1, 1, 30deg);
    }
}

@keyframes pulse2 {
    0% {
        opacity: 0;
    }

    100% {
        opacity: 1;
    }
}

@keyframes pulse2b {
    0% {
        /*backdrop-filter: blur(0px);*/
        opacity: 0;
    }

    100% {
        /*backdrop-filter: blur(8px);*/
        opacity: 0.8;
    }
}

@keyframes pulse3a {
    0% {
        opacity: 0;
        transform: translate3d(0, 20vh, 0) scale3d(0.6, 0.6, 1)
    }

    25% {
        opacity: 0.4;
        transform: translate3d(0, 0, 0) scale3d(1, 1, 1)
    }

    75% {
        opacity: 0.4;
        transform: translate3d(0, 0, 0) scale3d(1, 1, 1)
    }

    100% {
        opacity: 0.4;
        transform: translate3d(0, 0, 0) scale3d(1, 1, 1)
    }
}

@keyframes pulse3b {
    0% {
        opacity: 0;
        transform: translate3d(0, -20vh, 0) scale3d(0.6, 0.6, 1)
    }

    25% {
        opacity: 0.4;
        transform: translate3d(0, 0, 0) scale3d(1, 1, 1)
    }

    75% {
        opacity: 0.4;
        transform: translate3d(0, 0, 0) scale3d(1, 1, 1)
    }

    100% {
        opacity: 0.4;
        transform: translate3d(0, 0, 0) scale3d(1, 1, 1)
    }
}












.description {
    width: 100vw;
    height: 100vh;
}


body {
    height: 100vh;
    overflow-x: hidden;
    margin: 0;
    /* 添加 */
}

#Main {
    overflow: hidden;
    /* 防止水平滚动条出现 */
}

.container.horizontal {
    display: flex;
    width: 100vw;
    height: 100vh;
    flex-wrap: nowrap;
}

.container.horizontal .panel {
    width: 100vw;
    /* 改为视口宽度百分比 */
    height: 100vh;
}

.swipe-section {
    position: relative;
    width: 100vw;
    height: 100vh;
    overflow: hidden;
}

.swipe-section .panel {
    position: absolute;
    width: 100vw;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2em;
    color: white;
    font-weight: bold;
}

/* 添加面板颜色 */
.panel.red {
    background: #ff6b6b;
}

.panel.orange {
    background: #ffa726;
}

.panel.purple {
    background: #7e57c2;
}

.panel.blue {
    background: #42a5f5;
}

.panel.green {
    background: #66bb6a;
}

.panel.description {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}