* {
    margin: 0;
    padding: 0;
}

body {
    overflow: hidden;
}

.wrap {
    position: relative;
}

/* 背景图设置 */
.bg {
    width: 100%;
    height: 100vh;
    object-fit: cover;
}

/* PC端背景图 */
.bg-desktop {
    display: block;
}

/* 移动端背景图 */
.bg-mobile {
    display: none;
}

.text {
    position: absolute;
    top: 35%;
    left: 50%;
    transform: translateX(-50%);
}

.obtns {
    position: absolute;
    top: 35%;
    left: 50%;
    transform: translateX(-50%);
    width: 50%;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.obtns .single-column {
    display: flex;
    flex-direction: column;
    gap: 20px;
    width: 100%;
    align-items: center;
}

.obtns a {
    display: block;
    margin-bottom: 0;
}

.obtns img {
    cursor: pointer;
}

.obtns img:hover {
    transform: translateY(-6px);
    Filter: brightness(1.2);
    transition: transform 0.5s, filter 0.5s;
}

.kefu {
    position: fixed;
    right: 0;
    width: 30px;
    background-color: #64b0f7;
    top: 35%;
    z-index: 999999;
    text-align: center;
    padding: 10px 3px;
    color: #FFFFFF;
    text-decoration: none;
    border-radius: 10px 0px 0px 10px;
  }
  .kefu img{
    width: 100%;
  }

/* 按钮项样式 - 优化对齐 */
.btn-item {
    display: flex;
    align-items: center;
    background-color: rgba(255, 255, 255, 0.6);
    border-radius: 40px;
    padding: 16px 33px;
    box-shadow: 0 3px 10px rgba(0,0,0,0.05);
    text-decoration: none;
    width: 406px;
    box-sizing: border-box;
    transition: transform 0.3s, box-shadow 0.3s, background-color 0.3s;
}

.btn-item:hover {
    transform: translateY(-6px);
    box-shadow: 0 6px 15px rgba(0,0,0,0.1);
    background-color: rgba(255, 255, 255, 0.8);
}

/* Logo容器样式 - 确保图片居中 */
.logo-container {
    width: 32px;
    height: 32px;
    min-width: 32px;
    display: inline-block;
    text-align: center;
    line-height: 32px;
    margin-right: 20px;
}

.logo-img {
    max-width: 175%;
    max-height: 130%;
    vertical-align: middle;
}

/* 网站名称样式 - 确保文字垂直居中 */
.site-name {
    font-size: 21px;
    color: #333;
    font-weight: 500;
    display: inline-block;
    vertical-align: middle; 
    line-height: 32px;
}

/* 移动端适配 */
@media (max-width: 768px) {
    /* 移动端显示移动背景图，隐藏PC背景图 */
    .bg-desktop {
        display: none;
    }
    
    .bg-mobile {
        display: block;
    }
    
    /* 移动端布局调整 */
    body {
        overflow: hidden;
    }
    
    .wrap {
        height: 100vh;
        position: relative;
    }
    
    .obtns {
        position: absolute;
        top: 16%;
        left: 50%;
        transform: translate(-50%, -50%);
        width: 90%;
        z-index: 10;
    }
    
    .btn-item {
        width: 100%;
        max-width: 350px;
        font-size: 16px;
        padding: 14px 25px;
        margin: 0 auto;
        background-color: rgba(255, 255, 255, 0.9);
    }
    
    .btn-item:hover {
        background-color: rgba(255, 255, 255, 0.95);
    }
    
    .site-name {
        font-size: 18px;
        line-height: 28px;
    }
    
    .logo-container {
        width: 28px;
        height: 28px;
        min-width: 28px;
        line-height: 28px;
        margin-right: 15px;
    }
}