.UUbut{
    cursor: pointer;
    display: block;
    width: 121px;
    height: 39px;
    line-height: 39px;
    text-align: center;
    font-size: 18px;
    color: #fff;
    border-radius: 7px;
    background-color: #00446b;
    margin: 20px auto;
    -webkit-transition: all 0.3s ease;
    -ms-transition: all 0.3s ease;
    -moz-transition: all 0.3s ease;
    transition: all 0.3s ease;
}

/* 响应式媒体查询 - 移动端适配 */

/* 平板设备 (768px - 1024px) */
@media (max-width: 1024px) {
    .container, .container-fluid {
        width: 100% !important;
        padding: 0 15px !important;
        box-sizing: border-box !important;
    }
    
    #hd {
        min-width: auto !important;
        width: 100% !important;
    }
    
    .header-content {
        flex-direction: column !important;
        align-items: center !important;
        text-align: center !important;
    }
    
    .navbar-nav {
        flex-wrap: wrap !important;
        justify-content: center !important;
    }
    
    .navbar-nav li {
        padding: 0 10px !important;
    }
}

/* 手机设备 (480px - 768px) */
@media (max-width: 768px) {
    body {
        font-size: 14px !important;
    }
    
    .container, .container-fluid {
        width: 100% !important;
        max-width: 100% !important;
        padding: 0 10px !important;
    }
    
    .hd-main {
        flex-direction: column !important;
        padding: 10px !important;
    }
    
    .hd-main-logo {
        margin-bottom: 10px !important;
    }
    
    .hd-main-search {
        width: 100% !important;
        max-width: 100% !important;
        padding: 0 !important;
        margin-bottom: 10px !important;
    }
    
    .hd-menu {
        margin-top: 5px !important;
    }
    
    #hd-nav li a {
        padding: 12px 15px !important;
        font-size: 13px !important;
    }
    
    .full-width-banner {
        height: auto !important;
    }
    
    #j-slide-promotion,
    #j-slide-promotion .hp-slide-promotion,
    #j-slide-promotion .j-sw-clip,
    #j-slide-promotion .j-sw-c,
    #j-slide-promotion .j-sw-c li {
        height: auto !important;
        min-height: auto !important;
        max-height: 300px !important;
    }
    
    #j-slide-promotion .j-sw-c li img {
        height: auto !important;
        min-height: auto !important;
        max-height: 300px !important;
    }
    
    .main-content {
        padding: 10px !important;
    }
    
    .contentWrap {
        padding: 0 !important;
    }
    
    /* 隐藏PC端特有的元素 */
    .tool-box {
        display: none !important;
    }
    
    .float-supp-layer {
        display: none !important;
    }
}

/* 小屏手机设备 (小于480px) */
@media (max-width: 480px) {
    body {
        font-size: 12px !important;
    }
    
    #hd-nav li a {
        padding: 10px 8px !important;
        font-size: 12px !important;
    }
    
    .login-modal, .register-modal {
        width: 90% !important;
        max-width: 320px !important;
        margin: 0 auto !important;
    }
    
    .login-modal-group input {
        font-size: 14px !important;
        padding: 10px !important;
    }
    
    .login-modal-btn {
        padding: 12px !important;
        font-size: 14px !important;
    }
}

/* IE 10及以下兼容 */
@media screen and (-ms-high-contrast: active), (-ms-high-contrast: none) {
    .hd-menu {
        background: #667eea !important;
    }
    
    .container {
        display: block !important;
    }
}