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

body,
html {
    overflow-x: hidden;
    font-size: 16px;
    font-family: Arial, "Microsoft YaHei", sans-serif;
}

/* 基础样式 */
video {
    width: 100%;
    height: 100vh;
    object-fit: cover;
}

.imgs-hober {
    transition: all 0.3s ease;
}

.imgs-hober:hover {
    transform: scale(1.1);
}

/* 头部区域 */
.header {
    position: relative;
    width: 100%;
    height: 100vh;
    overflow: hidden;
}

.logo {
    position: absolute;
    top: 3rem;
    left: 2rem;
    height: 8rem;
    z-index: 10;
}

.age-tip {
    position: absolute;
    bottom: 2rem;
    left: 2rem;
    width: 2rem;
    z-index: 10;
}

.slogan {
    position: absolute;
    bottom: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80%;
    max-width: 80rem;
    z-index: 10;
}

.download-btn {
    position: absolute;
    bottom: 3rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
}

.download-btn img {
    height: 5rem;
}

/* 页脚 */
.footer {
    width: 100%;
    padding: 1rem 0;
    background-color: #000;
    color: #fff;
    text-align: center;
    font-size: 1rem;
}

.footer img {
    height: 0.8rem;
    vertical-align: middle;
    margin: 0 0.3rem;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .logo {
        height: 2rem;
        left: 1rem;
        top: 0.5rem;
    }

    .age-tip {
        top: 8rem;
        left: 1rem;
        width: 3rem;
    }

    .slogan {
        width: 90%;
    }

    .download-btn {
        bottom: 2rem;
    }

    .download-btn img {
        height: 2rem;
    }

    .footer {
        font-size: 0.7rem;
        padding: 0.8rem 0;
    }
}

@media (max-width: 480px) {
    .logo {
        height: 1.5rem;
    }

    .age-tip {
        top: 6rem;
        width: 2.5rem;
    }

    .download-btn img {
        height: 1.8rem;
    }
}