* {
    box-sizing: border-box;
}

html {
    line-height: 1.5;
}

body {
    background: #ffffff;
    margin: 0;
    padding: 0;
}

body, h1, h2, h3, h4, h5, h6, ul, ol, dl, dd, p {
    margin: 0;
}

body, h1, input, button, select, textarea {
    font-family: "Microsoft Yahei", "PingFang SC", "Helvetica Neue", sans-serif;
    font-size: .28rem;
    color: #fff;
}

input, button, select, textarea {
    border: none;
    outline: none;
}

input, button, textarea, th, td {
    padding: 0;
}

i, em, cite {
    font-style: normal;
}

ul, ol {
    padding: 0;
    list-style: none;
}

img {
    vertical-align: top;
    border: none;
    max-width: 100%;
    height: auto;
}

a {
    text-decoration: none;
    color: inherit;
}

.warp, .header {
    margin: 0 auto;
    width: 7.5rem;
    max-width: 100%;
}

.warp:after {
    content: '';
    display: table;
    clear: both;
}

.header {
    position: fixed;
    display: table;
    background: rgba(40, 40, 40, 0.5);
    z-index: 3;
}

.soft-logo, .soft-name, .soft-down {
    display: table-cell;
    height: 1rem;
    vertical-align: middle;
}

.soft-logo {
    width: .9rem;
    text-align: right;
}

.soft-logo img {
    border-radius: .15rem;
    width: .7rem;
    height: .7rem;
}

.soft-name {
    padding: 0 .17rem;
    line-height: .2rem;
    font-size: .18rem;
    font-weight: 300;
    color: #fff;
}

.soft-name p:first-child {
    line-height: .4rem;
    font-size: .3rem;
    font-weight: bold;
}

.soft-down {
    width: 1.66rem;
}

.soft-btn {
    border-radius: .5rem;
    width: 1.0rem;
    height: .6rem;
    background: #fff;
    text-align: center;
}

.soft-btn img {
    margin: .04rem 0 0 .05rem;
    width: 1.3rem;
}

.soft-cont {
    position: relative;
}

.soft-cont img {
    width: 100%;
    display: block;
}

.down-btn {
    position: absolute;
    top: 5.5rem;
    right: .4rem;
    padding: .5rem 0 0.1rem .5rem;
    width: 2.05rem !important;
    height: .48rem;
}

.step {
    margin: 0 auto;
    width: 7.5rem;
    max-width: 100%;
    background: #000 url("../images/step/step-header.jpg") no-repeat top / contain;
    text-align: center;
}

.step-header {
    padding: .5rem 0;
    font-size: .36rem;
    color: #fff;
}

.step img {
    margin-bottom: .3rem;
    width: 6.9rem;
    max-width: 100%;
}

.weixin {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    text-align: center;
    background: rgba(0, 0, 0, 0.8);
    z-index: 9;
}

.weixin img {
    margin: .3rem 0 0 .4rem;
    width: 5.73rem;
    height: 2.65rem;
    max-width: 100%;
}

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid #fff;
    border-top: 4px solid transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

.error-message {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0, 0, 0, 0.8);
    color: #fff;
    padding: 20px 30px;
    border-radius: 8px;
    display: none;
    z-index: 1001;
    text-align: center;
}

.download-btn {
    cursor: pointer;
    transition: opacity 0.3s;
}

.download-btn:hover {
    opacity: 0.8;
}

.download-btn:active {
    opacity: 0.6;
}

#weixin-tip {
    position: fixed;
    left: 0;
    top: 0;
    filter: alpha(opacity=80);
    width: 100%;
    height: 100%;
    z-index: 100;
}

#weixin-tip p {
    text-align: center;
    margin-top: 0%;
    padding: 0;
}

#weixin-tip img {
    display: block;
}