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

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
}

.title{
	width: 100%;
    max-width: 1200px;
	margin: 0 auto;
	height: 110px;
	padding-top: 26px;
}
.title > div{
	display: inline-block;
}
.logo{
	margin-right: 31px;
}
.logo > img{
	vertical-align: -6px;
    max-width: 100%;
    height: auto;
}
.logo-txt{
	border-left: 2px #ff6816 solid;
	padding-left: 20px;
}
.logo-txt p{
	margin-bottom: 0;
	font-size: 18px;
}
.logo-txt p:nth-child(1){
	margin-bottom: 16px;
}
.nav{
	float: right;
	height: 58px;
	line-height: 58px;
}
.nav > div{
	display: inline-block;
	margin-right: 90px;
}
.nav > div:nth-child(3){
	margin-right: 0;
}

.banner{
	background: url(images/banner-bj.png) no-repeat center center;
	background-size: cover;
	height: 500px;
	width: 100%;
}
.banner-main{
	width: 100%;
    max-width: 1200px;
	margin: 0 auto;
	overflow: hidden;
}
.banner-main > div{
	width: 50%;
	display: inline-block;
	margin-left: -2px;
	height: 500px;
    vertical-align: top;
}
.banner-main > div:nth-child(1){
	padding-top: 145px;
}
.banner-main > div:nth-child(2){
	padding-top: 78px;
}
.banner-left > div:nth-child(1){
	font-size: 50px;
	color: #fff;
	letter-spacing: 10px;
	margin-bottom: 18px;
	animation:myfirst 2s;
}
.banner-left > div:nth-child(2){
	font-size: 32px;
	color: #fff;
	margin-bottom: 42px;
	animation:myfirst 4s;
}
.banner-left > div:nth-child(3){
	font-size: 20px;
	color: #fff;
	animation:myfirst 6s;
}

@keyframes myfirst {
    from {padding-top:345px;}
    to {padding-top:0;}
}

.title-txt{
	font-size: 30px;
	color: #000;
	text-align: center;
	padding: 24px 0 20px;
}
.subhead-txt{
	font-size: 18px;
	color: #999;
	text-align: center;
	padding: 10px 0 40px;
}

/* ========== 产品列表区域修复 ========== */
.list{
	margin-bottom: 30px;
    position: relative;
}
.list-title{
	width: 1200px;
	margin: 0 auto;
	margin-bottom: 30px;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
}
.list-piece{
	width: 230px;
	height: 80px;
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	text-align: center;
    cursor: pointer;
    border: 2px solid transparent;
    border-radius: 8px;
    transition: all 0.3s ease;
    padding: 10px;
    position: relative;
}
.list-piece:hover {
    border-color: #ff6816;
    background: rgba(255, 104, 22, 0.05);
}
.list-piece > img{
	width: 40px;
    height: 40px;
    margin-bottom: 5px;
}
.list-piece p {
    margin: 0;
    font-size: 16px;
    color: #333;
    transition: color 0.3s ease;
}

/* ========== 内容区域修复 ========== */
.content{
	width: 100%;
	height: 240px;
	background: #eceff5;
	opacity: 0;
	transition: opacity 0.3s ease;
    position: absolute;
    left: 0;
    z-index: 100;
}
.content:not(.hidden) {
	opacity: 1;
}

.content-main{
	width: 1200px;
	margin: 0 auto;
	position: relative;
}
.content-list{
	position: relative;
    display: flex;
    align-items: center;
    min-height: 240px;
}
.content-list > div{
	display: inline-block;
}
.content-list > div:nth-child(1){
	width: 45%;
	text-align: right;
	padding-right: 165px;
	vertical-align: top;
	padding-top: 40px;
}
.content-list > div:nth-child(2){
	width: 55%;
	margin-left: -4px;
}
.content-list > div:nth-child(1) > p:nth-child(1){
	color: #ff6816;
	font-size: 24px;
	margin-bottom: 30px;
}
.content-list > div:nth-child(1) > p{
	color: #999;
	font-size: 16px;
}
.content-list > div:nth-child(2) > img{
    max-width: 100%;
    height: auto;
}
.content-list > div:nth-child(3){
    border-left: 10px solid transparent;
    border-right: 10px solid transparent;
    border-bottom: 16px solid #eceff5;
    position: absolute;
    top: -15px;
    left: 105px;
}

/* 隐藏类 */
.hidden {
    display: none !important;
}

/* ========== 下载区域优化 ========== */
.three {
    width: 100%;
    background: url(images/public_signal.png) no-repeat center center;
    background-size: cover;
    padding: 60px 0;
    display: flex;
    align-items: center;
}

.three .main {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.download-section {
    width: 100%;
    text-align: center;
}

.download-title {
    font-size: 32px;
    color: #fff;
    margin-bottom: 12px;
    font-weight: bold;
}

.download-subtitle {
    font-size: 18px;
    color: #fff;
    margin-bottom: 40px;
    opacity: 0.9;
}

/* 四列网格布局 */
.download-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    align-items: stretch;
}

.download-column {
    background: rgba(255, 255, 255, 0.15);
    padding: 25px 15px;
    border-radius: 12px;
    text-align: center;
    backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.25);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    height: 380px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.download-column::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #ff6816, #ff8c42);
}

.column-title {
    font-size: 18px;
    color: #ff6816;
    margin-bottom: 20px;
    font-weight: bold;
    padding-bottom: 12px;
    border-bottom: 2px solid rgba(255, 104, 22, 0.4);
    width: 100%;
}

.step-item {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    margin-bottom: 10px;
    color: #fff;
    font-size: 14px;
    width: 100%;
    padding: 0 8px;
}

.step-item img {
    width: 18px;
    height: 18px;
    margin-right: 8px;
    flex-shrink: 0;
}

/* 下载链接样式优化 */
.download-link-item {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    margin-bottom: 10px;
    color: #fff;
    font-size: 14px;
    width: 100%;
    padding: 0 8px;
}

.download-link-item a {
    color: #ff6816;
    text-decoration: none;
    font-size: 14px;
    padding: 8px 16px;
    border: 1px solid #ff6816;
    border-radius: 6px;
    transition: all 0.3s ease;
    display: inline-block;
    font-weight: 600;
    background: rgba(255, 255, 255, 0.1);
    width: 100%;
    text-align: center;
}

.download-link-item a:hover {
    background-color: #ff6816;
    color: #fff;
    transform: scale(1.05);
}

/* 二维码和下载按钮区域统一 */
.qrcode-box, .download-btn-box {
    margin: 10px 0;
    padding: 20px 15px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    width: 100%;
    border: 1px solid rgba(255, 255, 255, 0.2);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 160px;
    flex: none;
}

.qrcode-img {
    width: 120px;
    height: 120px;
    border-radius: 8px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    object-fit: contain;
    margin-bottom: 8px;
}

.download-btn-large {
    width: 120px;
    height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #ff6816, #ff8c42);
    border-radius: 8px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    transition: all 0.3s ease;
    text-decoration: none;
    margin-bottom: 8px;
}

.download-btn-large:hover {
    background: transparent;
    border-color: #ff6816;
    transform: scale(1.05);
}

.download-btn-large img {
    width: 50px;
    height: 50px;
}

.download-links {
    margin: 5px 0;
    width: 100%;
}

.download-links a {
    color: #ff6816;
    text-decoration: none;
    font-size: 13px;
    padding: 6px 12px;
    border: 1px solid #ff6816;
    border-radius: 4px;
    transition: all 0.3s ease;
    display: inline-block;
    margin: 3px 0;
    font-weight: 600;
    background: rgba(255, 255, 255, 0.1);
}

.download-links a:hover {
    background-color: #ff6816;
    color: #fff;
}

.update-info {
    color: #d0d0d0;
    font-size: 11px;
    margin: 8px 0;
    text-align: center;
    width: 100%;
    font-style: italic;
}

/* 联系我们区域 */
.four{
	width: 100%;
    max-width: 1200px;
	margin: 0 auto;
	margin-top: 20px;
	margin-bottom: 20px;
    padding: 0 15px;
}
.four > p:nth-child(1){
	font-size: 30px;
	color: #000;
	text-align: center;
	margin-bottom: 15px;
}
.four > p:nth-child(2){
	font-size: 18px;
	color: #999;
	text-align: center;
	margin-bottom: 50px;
}
.four > div > div{
	display: inline-block;
	width: 50%;
	margin-left: -2px;
	padding-left: 75px;
}
.four > div > div > div:nth-child(1){
	font-size: 24px;
	color: #ff6816;
	margin-bottom: 10px;
}
.four > div > div > div{
	font-size: 18px;
	color: #999;
	margin-bottom: 6px;
}
.four > div > div > div > img{
	margin-right: 15px;
	padding-left: 5px;
} 
.four > div > div > div:nth-child(1) > img{
    margin-right: 10px;
    vertical-align: -13px;
    padding-left: 0;
} 

.record{
	width: 100%;
	height: auto;
	min-height: 30px;
	line-height: 1.5;
	text-align: center;
	color: #fff;
	background: #000;
    padding: 15px;
    box-sizing: border-box;
    font-size: 14px;
}

a,a:hover, a:visited, a:link, a:active {
  	color: #fff;
  	font-size: 14px;  
    text-decoration: none;
}

.hidden {
    display: none !important;
}

/* ========== 移动端优化 ========== */
@media screen and (max-width: 1200px) {
    .download-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
        max-width: 800px;
    }
}

@media screen and (max-width: 768px) {
    .title {
        height: auto;
        padding: 15px;
        text-align: center;
    }
    
    .logo-txt {
        border-left: none;
        padding-left: 0;
        margin: 10px 0;
    }
    
    .nav {
        float: none;
        width: 100%;
        text-align: center;
        height: auto;
        line-height: 40px;
    }
    
    .nav > div {
        margin: 0 10px;
        display: inline-block;
    }
    
    .banner {
        height: 350px;
    }
    
    .banner-main > div {
        width: 100%;
        height: auto;
        padding-top: 50px !important;
        text-align: center;
    }
    
    .banner-left > div:nth-child(1) {
        font-size: 28px;
        letter-spacing: 3px;
    }
    
    .banner-left > div:nth-child(2) {
        font-size: 20px;
    }
    
    .banner-left > div:nth-child(3) {
        font-size: 16px;
    }
    
    .list-title {
        gap: 8px;
        padding: 0 10px;
        flex-direction: column;
        align-items: center;
    }
    
    .list-piece {
        width: 100%;
        max-width: 280px;
        height: 60px;
        margin-bottom: 5px;
        padding: 8px;
        flex-direction: row;
        justify-content: flex-start;
    }
    
    .list-piece > img {
        width: 28px;
        height: 28px;
        margin-right: 10px;
        margin-bottom: 0;
    }
    
    .list-piece p {
        font-size: 16px;
    }
    
    /* 手机端内容显示优化 */
    .content {
        position: relative;
        margin-top: 0;
        margin-bottom: 0;
    }
    
    .content-main {
        padding: 0 15px;
    }
    
    .content-list {
        flex-direction: column;
        min-height: auto;
        padding: 20px 0;
    }
    
    .content-list > div:nth-child(1) {
        width: 100%;
        text-align: center;
        padding: 0;
        order: 1;
    }
    
    .content-list > div:nth-child(2) {
        width: 100%;
        padding: 15px 0;
        order: 2;
    }
    
    .content-list > div:nth-child(3) {
        display: none;
    }
    
    .three {
        padding: 40px 0;
    }
    
    .download-title {
        font-size: 26px;
        padding: 0 15px;
    }
    
    .download-subtitle {
        font-size: 16px;
        padding: 0 15px;
        margin-bottom: 30px;
    }
    
    .download-grid {
        grid-template-columns: 1fr;
        gap: 20px;
        padding: 0 15px;
        max-width: 400px;
    }
    
    .download-column {
        height: auto;
        min-height: 350px;
        padding: 20px 15px;
    }
    
    .qrcode-img {
        width: 110px;
        height: 110px;
    }
    
    .download-btn-large {
        width: 110px;
        height: 110px;
    }
    
    .download-link-item a {
        padding: 10px 16px;
        font-size: 16px;
    }
    
    .four > div > div {
        width: 100%;
        display: block;
        padding-left: 20px;
        margin-bottom: 30px;
    }
}

@media screen and (max-width: 480px) {
    .list-piece {
        max-width: 100%;
    }
    
    .nav > div {
        display: block;
        margin: 5px 0;
    }
    
    .banner {
        height: 300px;
    }
    
    .banner-left > div:nth-child(1) {
        font-size: 24px;
    }
    
    .download-title {
        font-size: 22px;
    }
    
    .download-subtitle {
        font-size: 14px;
    }
    
    .download-column {
        min-height: 320px;
        padding: 15px 12px;
    }   
}
/* ========== 移动端修复 ========== */
@media screen and (max-width: 768px) {
    .list-title {
        width: 100% !important;
        max-width: 100% !important;
        padding: 0 15px;
        display: flex !important;
        flex-wrap: wrap !important;
        justify-content: center !important;
    }
    
    .list-piece {
        width: 45% !important;
        max-width: 200px !important;
        height: 80px !important;
        display: flex !important;
        margin: 5px !important;
        flex-direction: column !important;
    }
    
    .list-piece > img {
        width: 40px !important;
        height: 40px !important;
        margin-bottom: 5px !important;
    }
    
    .content {
        position: relative !important;
        margin-top: 10px !important;
        height: auto !important;
        min-height: 200px !important;
    }
    
    .content-main {
        width: 100% !important;
        max-width: 100% !important;
        padding: 0 15px;
    }
    
    .content-list {
        flex-direction: column !important;
        min-height: auto !important;
        padding: 20px 0 !important;
    }
    
    .content-list > div:nth-child(1) {
        width: 100% !important;
        text-align: center !important;
        padding: 0 !important;
        padding-top: 20px !important;
    }
    
    .content-list > div:nth-child(2) {
        width: 100% !important;
        padding: 15px 0 !important;
        text-align: center !important;
    }
    
    .content-list > div:nth-child(3) {
        display: none !important;
    }
    .address-line {
        white-space: normal !important;
        word-break: break-word;
    }
}