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

body {
    font-family: "Microsoft YaHei", sans-serif;
    color: #333;
    width: 100%;
    margin: 0 auto;
    max-width: 1920px;    
    font-size: 1.5rem;
}

.section-bg {
    max-width: 1920px;
    width: 100%;
    position: relative;
}

.earth-bg {
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    height: auto;
    z-index: -1;
    max-height: 1920px;
}

.section-bg section {
    width: 80%;
    position: relative;
    z-index: 1;
    margin: 0 auto;
    clear: both;
}

.banner {
    text-align: center;
    border-radius: 10px;
    width: 100%;
    margin: 0 auto;
    overflow: hidden;
    position: relative;
}

.banner img {
    position: relative;
    left: 50%;
    transform: translateX(-50%);
    max-width: 1920px;
    width: 100%;
    height: auto;
    display: block;
}


.introduction{
    position: relative;
    max-width: 1920px;
    width: 100%;
}

.introduction img{
    width: 100%;
    height: auto;
}
.time-period {
    margin-left: 10%;
    width: 80%;
    clear: both;
    margin-top: 2%;
    margin-bottom: 2%;
}
.time-period h3{
    float: left;
    margin-right: 80px;
    margin-top: 15px;
    font-size: 1.5rem;
}
.time-period img{
    width: 35%;
}

.contact-info {
    margin:30px 0;
}

.contact-item {
    margin-bottom: 15px;
    margin-left: 20px;
}
.contact-item img{
    width: 65%;
}

.requirements-box {
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

.requirements-box ul {
    list-style-position: inside;
    padding: 10px;
}

.notes {
    max-width: 1920px;
    margin: 60px 0 60px;
}
.notes .section-title{
    margin-left: 10%;
}

.notes img {
    width: 80%;
}

h3 {
    color: #315275;
    margin-bottom: 15px;
}


.section-title {
    position: relative;
    padding-bottom: 15px;
    margin-bottom: 20px;
    font-size: 1.5rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 2px;
    background-color: #315275;
}

.process-steps {
    position: relative;
    margin-bottom: 60px;
}
.process-map .section-title{
    margin-bottom: 20px;
}

.step-item {
    color: #315275;
    position: relative;
    clear: both;
    margin: 30px 0 30px 20px;
}
.step-title{
    margin-bottom: 12px;
    font-weight: bold;
}
.step-content {
    position: relative;
    display: inline-block;
}

.download-button{
    float: right;
    width: 200px;
    max-width: 400px;
}
.download-button img{
    width: 200px;
    max-width: 400px;
    cursor: pointer;
}
.process-map img{
    width: 100%;
}
.user-list{
    max-width: 1920px;
    width: 100%;
    position: relative;
}
.user-bg{
    width: 100%;
    height: auto;
    max-width: 1920px;
}
.user-list .section-title{
    position: absolute;
    top: 16%;
    left: 10%;
    color: #fff;
}
.user-list .section-title::after {
    background-color: #fff;
}

.user-list-box{
    position: absolute;
    right: 5%;
    width: 60%;
    top: 10%;
}

.user-list-box img{
    width: 100%;
    height: auto;
    max-height: 700px;
}

/* 修改媒体查询，确保文字大小在不同缩放比例下保持一致 */
@media screen and (min-width: 1200px) {
    body {
        min-width: 1200px;
        -webkit-text-size-adjust: none;  /* 禁止 iOS 设备自动调整字体大小 */
        -moz-text-size-adjust: none;
        -ms-text-size-adjust: none;
        text-size-adjust: none;
    }

    .step-item {
        margin: 25px 0 25px 15px;
    }

    .download-button {
        width: 180px;
    }

    .download-button img {
        width: 180px;
    }
}

/* 处理超大屏幕和高缩放比例 */
@media screen and (min-width: 1920px) {

    body {
        font-size: 1rem;
    }
    .earth-bg {
        max-height: 100%;
    }

}

/* 添加打印媒体查询 */
@media print {
    body {
        width: 100%;
        margin: 0;
        padding: 20px;
    }
}