:root {
    --primary-color: #4A90E2;
    --secondary-color: #2C3E50;
    --accent-color: #E74C3C;
    --text-color: #333;
    --light-gray: #f5f6fa;
    --white: #ffffff;
}

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

body {
    font-family: 'Noto Sans SC', sans-serif;
    color: #222;
    background: #fff;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    -webkit-tap-highlight-color: transparent;
}

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
}

.nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.nav-links a {
    margin-left: 2rem;
    text-decoration: none;
    color: var(--secondary-color);
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-links a:hover {
    color: var(--primary-color);
}

.hero-bg {
    min-height: 800px;
    background-image: url(./img/bg-black.png);
    background-size: cover;
    background-position: center;
    position: relative;
    padding-bottom: 40px;
    overflow: hidden;
}

/* LOGO区 */
.main-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100px;
    padding: 16px 48px 0 48px;
    background: rgba(255, 255, 255, 0.7);
}
.logo-area {
    display: flex;
    align-items: center;
}

/* 头部导航 */
.header-nav {
    display: flex;
    align-items: center;
    gap: 30px;
}
.nav-link {
    color: #333;
    text-decoration: none;
    font-size: 1rem;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}
.nav-link:hover {
    color: #4A90E2;
}
.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background-color: #4A90E2;
    transition: width 0.3s ease;
}
.nav-link:hover::after {
    width: 100%;
}
.logo-img {
    width: 120px;
    height: 50px;
    /* width: 48px;
    height: 48px;
    border-radius: 12px;
    background: #fff;
    margin-right: 12px; */
}
.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: #222;
}

/* 主标题 副标题 */
.hero-content {
    text-align: center;
    margin-top: 40px;
}
.main-title {
    font-size: 2.8rem;
    font-weight: 700;
    color: #222;
    line-height: 1.3;
    margin-bottom: 18px;
}
.main-subtitle {
    font-size: 1.2rem;
    color: #666;
    /* margin-bottom: 36px; */
}

.platform-right-icon{
    font-size: 124px;
    color:Red;
    height: 100px;
    text-align: left;
    margin-left: -90px;
}
.platform-right-title{
    font-size: 24px;
    font-weight: 700;
    color: #ffffff;
}
.platform-right-text{
    font-size: 14px;
    color: rgb(255, 255, 255,0.8);
    margin: 20px 0;
    line-height: 1.8;
}
.platform-right-support-title{
    font-size: 24px;
    font-weight: 700;
    color: #ffffff;
    margin-top: 40px;
}
.platform-right-support-list{
    display: flex;
    margin-top: 20px;
}
.platform-right-support-list img{
    width: 42px;
    height: 42px;
    margin-right: 10px;

}




/* 二维码下载区 */
.qrcode-download {
    display: flex;
    justify-content: center;
    gap: 48px;
    margin-top: 42px;
    margin-bottom: 32px;
}
.platform-content{
    width: 100%;
    display: flex;
    /* padding: 0 100px; */
    /* align-items: center; */
    justify-content: center;
}
.platform-right{
    width: 50%;
    padding: 0 100px;
}
.qrcode-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}
.qrcode-item img {
    width: 120px;
    height: 120px;
    border-radius: 16px;
    background: #fff;
    box-shadow: 0 4px 24px rgba(0,0,0,0.08);
}
.qrcode-label {
    margin-top: 10px;
    font-size: 1rem;
    color: #444;
}

/* 平台icon区 */
.platform-icons {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-top: 10px;
    font-size: 1rem;
    color: #888;
}
.platform-icons img {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: #fff;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

/* 功能模块区 */
.features-section {
    background: #fff;
    padding: 64px 0 32px 0;
}
.features-title {
    text-align: center;
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 48px;
    color: #222;
}
.features-list {
    /* max-width: 1100px; */
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 64px;
}
.feature-block {
    height: 520px;
    display: flex;
    align-items: center;
    gap: 48px;
    justify-content: space-between;
}
.feature-block.reverse {
    flex-direction: row-reverse;
}
.feature-img{
    width: 50%;
}
.feature-img img {
    max-width: 100%;
    max-height: 100%;
    min-height: 480px;
    /* width: 200px;
    height: 400px;
    border-radius: 24px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.10);
    background: #f5f5f5; */
}
.feature-desc {
    flex: 1;
    min-width: 260px;
    padding-right: 155px;
}
.feature-desc h3 {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: #222;
}
.feature-desc p {
    font-size: 1.2rem;
    color: #555;
    line-height: 1.8;
}

/* 页脚 */
.footer {
    background: #181818;
    color: #fff;
    padding: 40px 0 0 0;
    /* margin-top: 60px; */
}
.footer-main {
    /* display: flex; */
    align-items: center;
    justify-content: center;
    gap: 48px;
    margin-bottom: 16px;
}
.footer-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    font-size: 1.2rem;
    font-weight: 700;
}
/* .footer-logo img {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: #fff;
} */
.footer-info {
    display: flex;
    margin-top: 50px;
    gap: 4px;
    font-size: 1rem;
    color: #ccc;
}
.footer-copyright {
    text-align: center;
    color: #888;
    font-size: 0.95rem;
    padding: 12px 0 24px 0;
}
.platform-bg{
    width: 100%;
    height: auto;
    display: block;
}

.platform-section {
    overflow: hidden;
    width: 100%;
    height: 524px;
    background: #000000;
}
.platform-left{
    width: 50%;
}
.pl-144{
    padding-left: 240px;
}
.feature-desc-title{
    font-weight: 700;
    color: #222;
}
.feature-desc-list{
  margin-top: 30px;
}
.feature-desc-item{
    font-size: 18px;
    line-height: 1.8;
}
.footer-info-item{
   flex: 1;
   text-align: center;
   display: flex;
   align-items: center;
   justify-content: center;
   gap: 12px;
}

/* 响应式 - 平板和小屏幕 */
@media (max-width: 1024px) {
    .feature-desc {
        padding-right: 80px;
    }
    .pl-144 {
        padding-left: 120px;
    }
}

@media (max-width: 900px) {
    .features-list {
        gap: 32px;
    }
    .feature-block, .feature-block.reverse {
        flex-direction: column;
        gap: 24px;
        align-items: flex-start;
        height: auto;
        padding: 0 20px;
    }
    .feature-img {
        width: 100%;
        text-align: center;
    }
    .feature-img img {
        width: 280px;
        height: auto;
        min-height: auto;
        max-width: 100%;
    }
    .feature-desc {
        width: 100%;
        padding-right: 20px;
    }
    .pl-144 {
        padding-left: 20px;
    }
    .feature-desc h3 {
        font-size: 1.3rem;
    }
    .feature-desc p {
        font-size: 1.1rem;
    }
    .feature-desc-item {
        font-size: 16px;
    }
}

/* 移动端优化 */
@media (max-width: 768px) {
    .hero-bg {
        min-height: 600px;
        padding-bottom: 20px;
    }
    
    .main-header {
        padding: 16px 20px 0 20px;
        height: auto;
        min-height: 80px;
        flex-direction: column;
        gap: 15px;
        align-items: center;
    }
    
    .header-nav {
        gap: 20px;
    }
    
    .nav-link {
        font-size: 0.95rem;
    }
    
    .logo-img {
        width: 100px;
        height: 42px;
    }
    
    .hero-content {
        margin-top: 30px;
        padding: 0 20px;
    }
    
    .main-title {
        font-size: 2rem;
        line-height: 1.2;
        margin-bottom: 16px;
    }
    
    .main-subtitle {
        font-size: 1.1rem;
        margin-bottom: 30px;
        line-height: 1.5;
    }
    
    .qrcode-download {
        gap: 30px;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .qrcode-item img {
        width: 100px;
        height: 100px;
    }
    
    .qrcode-label {
        font-size: 0.9rem;
    }
    
    .features-section {
        padding: 40px 0 20px 0;
    }
    
    .features-title {
        font-size: 1.6rem;
        margin-bottom: 30px;
        padding: 0 20px;
    }
    
    .footer-info {
        flex-direction: column;
        gap: 15px;
        margin-top: 30px;
        padding: 0 20px;
    }
    
    .footer-info-item {
        justify-content: flex-start;
        text-align: left;
        font-size: 0.9rem;
    }
    
    .footer-copyright {
        font-size: 0.85rem;
        padding: 16px 20px 20px 20px;
    }
}

@media (max-width: 600px) {
    .main-header {
        padding: 12px 16px 0 16px;
        height: auto;
        min-height: 70px;
    }
    
    .header-nav {
        gap: 16px;
    }
    
    .nav-link {
        font-size: 0.9rem;
    }
    
    .logo-img {
        width: 90px;
        height: 38px;
    }
    
    .main-title {
        font-size: 1.6rem;
        line-height: 1.3;
    }
    
    .main-subtitle {
        font-size: 1rem;
    }
    
    .qrcode-download {
        gap: 20px;
    }
    
    .qrcode-item img {
        width: 90px;
        height: 90px;
    }
    
    .qrcode-label {
        font-size: 0.85rem;
        margin-top: 8px;
    }
    
    .features-title {
        font-size: 1.4rem;
        margin-bottom: 25px;
    }
    
    .feature-block {
        padding: 0 16px;
    }
    
    .feature-desc {
        padding-right: 16px;
    }
    
    .pl-144 {
        padding-left: 16px;
    }
    
    .feature-desc h3 {
        font-size: 1.2rem;
        margin-bottom: 12px;
    }
    
    .feature-desc p {
        font-size: 1rem;
    }
    
    .feature-desc-item {
        font-size: 15px;
        line-height: 1.6;
    }
    
    .feature-desc-list {
        margin-top: 20px;
    }
    
    .feature-img img {
        width: 240px;
    }
}

/* 超小屏幕优化 */
@media (max-width: 480px) {
    .hero-bg {
        min-height: 550px;
    }
    
         .main-title {
         font-size: 1.4rem;
     }
     
     .main-title br {
         display: none;
     }
    
    .main-subtitle {
        font-size: 0.95rem;
        margin-bottom: 25px;
    }
    
    .qrcode-download {
        gap: 15px;
        margin-bottom: 20px;
    }
    
    .qrcode-item img {
        width: 80px;
        height: 80px;
    }
    
    .qrcode-label {
        font-size: 0.8rem;
    }
    
    .features-title {
        font-size: 1.3rem;
        margin-bottom: 20px;
    }
    
    .feature-desc h3 {
        font-size: 1.1rem;
    }
    
    .feature-desc p {
        font-size: 0.95rem;
    }
    
    .feature-desc-item {
        font-size: 14px;
    }
    
    .feature-img img {
        width: 200px;
    }
    
    .footer-info-item {
        font-size: 0.85rem;
    }
}