/* 全局样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans', sans-serif;
    color: rgba(0, 0, 0, 0.85);
    background-color: #f0f2f5;
    line-height: 1.5;
    margin: 0;
}

.container {
    max-width: 1440px;
    margin: 0 auto;
    overflow: hidden;
}

/* 头部导航样式 */
.header-wrapper {
    width: 100%;
    background-color: #fff;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 50px;
    background-color: #fff;
    max-width: 1440px;
    margin: 0 auto;
}

.logo img {
    height: 32px;
}

.nav ul {
    display: flex;
    list-style: none;
}

.nav li {
    margin-left: 32px;
}

.nav a {
    color: rgba(0, 0, 0, 0.65);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s;
}

.nav a:hover {
    color: #1890ff;
}

/* 主横幅区域样式 */
.banner-wrapper {
    width: 100%;
    background-image: url('img/bg.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    height: 530px;
}

.banner {
    max-width: 1440px;
    margin: 0 auto;
    padding: 64px 50px;
    height: 100%;
    display: flex;
    align-items: center;
}

.banner-content {
    display: flex;
    justify-content: flex-start;
    align-items: center;
    width: 100%;
}

.banner-text {
    max-width: 800px;
    text-align: left;
    margin-left: 120px;
}

.banner-text h1 {
    font-size: 38px;
    font-weight: 600;
    margin-bottom: 10px;
    color: rgba(0, 0, 0, 0.85);
}

.banner-text p {
    font-size: 18px;
    color: rgba(0, 0, 0, 0.65);
    margin-bottom: 30px;
}

.download-area {
    display: flex;
    gap: 24px;
    justify-content: flex-start;
}

.download-box {
    background-color: #fff;
    border-radius: 8px;
    padding: 24px;
    text-align: center;
    width: 160px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.qr-code {
    width: 100px;
    height: 100px;
    margin-bottom: 8px;
}

.download-box p {
    font-size: 14px;
    margin-bottom: 12px;
}

.download-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #f5f5f5;
    color: rgba(0, 0, 0, 0.65);
    padding: 8px 12px;
    border-radius: 4px;
    text-decoration: none;
    font-size: 14px;
    transition: background-color 0.3s;
}

.download-btn:hover {
    background-color: #e8e8e8;
}

.download-icon {
    width: 16px;
    height: 16px;
    margin-right: 4px;
}

/* 我们的优势样式 */
.advantages {
    padding: 40px 24px 0 24px;
    background-color: #f0f2f5;
    text-align: center;
}

.section-title {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 48px;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -12px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 3px;
    background-color: #1890ff;
}

.advantage-cards {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    margin: 0 -12px;
}

.advantage-card {
    flex: 1;
    min-width: 240px;
    background-color: #fff;
    border-radius: 20px;
    padding: 32px 24px;
    margin: 12px;
    transition: transform 0.3s, box-shadow 0.3s;
    text-align: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.advantage-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.advantage-icon {
    width: 44px;
    height: 40px;
    margin-bottom: 16px;
}

.advantage-card h3 {
    font-size: 18px;
    margin-bottom: 12px;
    font-weight: 500;
}

.advantage-card p {
    color: rgba(0, 0, 0, 0.65);
    font-size: 14px;
    line-height: 1.6;
    text-align: left;
}

/* 功能介绍样式 */
.features {
    padding: 20px 30px 0 30px;
    text-align: center; /* 标题居中 */
}

/* 功能模块基本样式 - 默认为左图右文布局 */
.feature {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
    justify-content: space-between;
    text-align: left; /* 内容文字左对齐 */
    background-color: #fff;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.05);
}

/* 反向布局 - 用于第二个功能模块的左文右图布局 */
.feature.reverse {
    flex-direction: row-reverse;
}

/* 功能图片区域样式 */
.feature-image {
    flex: 1;
    max-width: 600px;
    display: flex;
    align-items: flex-end;
    justify-content: center;
}

.feature-image img {
    max-width: 70%;
    border-radius: 12px 12px 0 0;

    margin-bottom: -40px;
}

/* 功能内容区域样式 */
.feature-content {
    flex: 1;
    max-width: 620px;
    padding: 0 24px;
}

.feature-icon {
    width: 40px;
    height: 40px;
    margin-bottom: 16px;
}

.feature-content h3 {
    font-size: 24px;
    margin-bottom: 16px;
    font-weight: 500;
}

.feature-content p {
    color: rgba(0, 0, 0, 0.65);
    font-size: 16px;
    line-height: 1.6;
}

/* 页脚样式 */
.footer {
    text-align: center;
    padding: 0 24px 10px 24px;
    color: rgba(0, 0, 0, 0.45);
    font-size: 14px;
}

/* 移动端吸底下载按钮样式 */
.mobile-download-bar {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background-color: #fff;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
    padding: 12px 20px;
    z-index: 100;
    text-align: center;
}

.mobile-download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: #1890ff;
    color: #fff;
    border-radius: 24px;
    padding: 12px 30px;
    font-size: 16px;
    font-weight: 500;
    text-decoration: none;
    width: 100%;
    transition: background-color 0.3s;
}

.mobile-download-btn:hover {
    background-color: #40a9ff;
}

.mobile-download-btn .download-icon {
    filter: brightness(0) invert(1);
    margin-right: 8px;
}

/* 动画效果 */
@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .container {
        max-width: 100%;
    }
    
    .header {
        padding: 16px 24px;
    }
    
    .banner {
        padding: 40px 24px;
    }
    
    .banner-content {
        justify-content: center;
    }
    
    .banner-text {
        margin-left: 0;
        text-align: center;
        max-width: none;
    }
    
    .download-area {
        justify-content: center;
    }
    
    .feature, .feature.reverse {
        flex-direction: column;
        text-align: center;
        padding: 30px 20px;
    }
    
    .feature-content {
        max-width: none;
        margin-top: 32px;
        order: 2;
        text-align: center;
    }
    
    .feature-image {
        max-width: none;
        order: 1;
        margin-bottom: 0;
    }
    
    .feature-image img {
        margin-bottom: 0;
        border-radius: 12px;
    }
    
    .feature.reverse .feature-content {
        order: 2;
    }
    
    .feature.reverse .feature-image {
        order: 1;
    }
}

@media (max-width: 768px) {
    .header {
        padding: 16px 16px;
    }
    
    .banner-wrapper {
        height: auto;
        min-height: 530px;
        background-position: calc(50% - 270px) center;
    }
    
    .banner {
        padding: 40px 16px;
    }
    
    .banner-content {
        justify-content: center;
        margin-top: 30px;
    }
    
    .banner-text {
        margin-left: 0;
        text-align: center;
    }
    
    .banner-text h1 {
        font-size: 32px;
    }
    
    .banner-text p {
        font-size: 16px;
    }
    
    .download-area {
        flex-direction: column;
        align-items: center;
        justify-content: center;
    }
    
    .mobile-hide {
        display: none;
    }
    
    .mobile-download-bar {
        display: block;
    }
    
    /* 为了给吸底按钮腾出空间，给页面底部添加内边距 */
    body {
        padding-bottom: 70px;
    }
    
    .download-box {
        width: 100%;
        max-width: 200px;
        margin-bottom: 16px;
    }
    
    .advantage-cards {
        flex-direction: column;
    }
    
    .advantage-card {
        margin-bottom: 16px;
    }
    
    .features {
        padding: 40px 16px 0 16px;
    }
    
    .feature {
        margin-bottom: 20px;
        padding: 24px 16px;
    }
    
    .feature-content h3 {
        font-size: 20px;
        text-align: center;
    }
    
    .feature-content p {
        font-size: 14px;
        text-align: center;
    }
    
    .feature-image img {
        max-width: 70%;
        margin-bottom: 0;
        border-radius: 12px;
    }
}

/* 关于我们浮层样式 */
.about-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
}

.about-overlay.active {
    opacity: 1;
    visibility: visible;
}

.about-content {
    width: 90%;
    max-width: 600px;
    background-color: #fff;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    overflow: hidden;
    transform: translateY(20px);
    transition: transform 0.3s;
}

.about-overlay.active .about-content {
    transform: translateY(0);
}

.about-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    border-bottom: 1px solid #f0f0f0;
}

.about-header h2 {
    margin: 0;
    font-size: 18px;
    color: rgba(0, 0, 0, 0.85);
}

.close-btn {
    background: none;
    border: none;
    font-size: 24px;
    color: rgba(0, 0, 0, 0.45);
    cursor: pointer;
    transition: color 0.2s;
}

.close-btn:hover {
    color: rgba(0, 0, 0, 0.85);
}

.about-body {
    padding: 24px;
    max-height: 70vh;
    overflow-y: auto;
}

.about-body p {
    margin: 0 0 16px;
    line-height: 1.6;
    color: rgba(0, 0, 0, 0.75);
    text-align: justify;
}

.about-body p:last-child {
    margin-bottom: 0;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .about-content {
        width: 95%;
    }
    
    .about-header {
        padding: 16px 20px;
    }
    
    .about-body {
        padding: 20px;
    }
}