* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    background: url('../images/1.jpg') no-repeat center center;
    background-size: cover;
    cursor: pointer;
    font-family: Arial, sans-serif;
    transition: background-image 1s ease-in-out;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: inherit;
    background-size: cover;
    z-index: -1;
}

/* 移动端竖屏时，背景图旋转90度 */
@media (max-width: 768px) and (orientation: portrait) {
    body::before {
        transform: rotate(90deg);
        transform-origin: center center;
        width: 100vh;
        height: 100vw;
        top: 50%;
        left: 50%;
        margin-left: -50vh;
        margin-top: -50vw;
    }
}

.container {
    width: 100%;
    height: 100%;
    position: relative;
}

/* 中间跳动的文本 */
.center-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: clamp(24px, 8vw, 64px);
    font-weight: 300;
    color: #000;
    text-shadow: 0 0 20px rgba(0, 0, 0, 0.3),
                 0 0 40px rgba(0, 0, 0, 0.2);
    z-index: 100;
    white-space: nowrap;
    display: flex;
    -webkit-box-reflect: below 10px linear-gradient(transparent, transparent 40%, rgba(0, 0, 0, 0.1));
    padding: 0 10px;
}

.center-text span {
    display: inline-block;
    animation: wave 0.5s ease-in-out infinite;
}

.center-text span:nth-child(1) { animation-delay: 0s; }
.center-text span:nth-child(2) { animation-delay: 0.0625s; }
.center-text span:nth-child(3) { animation-delay: 0.125s; }
.center-text span:nth-child(4) { animation-delay: 0.1875s; }
.center-text span:nth-child(5) { animation-delay: 0.25s; }
.center-text span:nth-child(6) { animation-delay: 0.3125s; }
.center-text span:nth-child(7) { animation-delay: 0.375s; }
.center-text span:nth-child(8) { animation-delay: 0.4375s; }
.center-text span:nth-child(9) { animation-delay: 0.5s; }
.center-text span:nth-child(10) { animation-delay: 0.5625s; }
.center-text span:nth-child(11) { animation-delay: 0.625s; }
.center-text span:nth-child(12) { animation-delay: 0.6875s; }
.center-text span:nth-child(13) { animation-delay: 0.75s; }
.center-text span:nth-child(14) { animation-delay: 0.8125s; }
.center-text span:nth-child(15) { animation-delay: 0.875s; }
.center-text span:nth-child(16) { animation-delay: 0.9375s; }

@keyframes wave {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(clamp(-10px, -3vw, -20px));
    }
}

/* 弹幕容器 */
.danmaku-container {
    width: 100%;
    height: 100%;
    position: relative;
    overflow: hidden;
}

/* 弹幕项 */
.danmaku-item {
    position: absolute;
    font-weight: normal;
    white-space: nowrap;
    animation: scroll-left 15s linear infinite;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    will-change: transform;
    margin: 0;
    padding-left: 100%;
}

/* 用户发送的弹幕 */
.user-danmaku {
    border: 1px solid #888;
    padding: 4px 8px;
    border-radius: 8px;
    background: rgba(0, 0, 0, 0.2);
    box-shadow: 0 0 5px rgba(136, 136, 136, 0.3);
}

/* 移动端适配 */
@media (max-width: 768px) {
    .center-text {
        font-size: clamp(20px, 6vw, 48px);
    }
    
    .danmaku-item {
        font-size: clamp(14px, 4vw, 24px) !important;
    }
    
    .user-danmaku {
        padding: 2px 6px;
        border-width: 1px;
    }
}

@keyframes scroll-left {
    0% {
        transform: translate(0);
    }
    100% {
        transform: translate(-115%);
    }
}