:root {
            --primary: #4a6cf7;
            --dark: #1e293b;
            --light: #f8fafc;
            --gray: #94a3b8;
            --success: #10b981;
            --danger: #ef4444;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', system-ui, sans-serif;
        }
        li{
            list-style: none;
        }
        a{
            text-decoration: none;
            color: var(--light);
        }
        body {
            background: linear-gradient(135deg, #0f172a, #1e293b);
            color: var(--light);
            min-height: 100vh;
            padding: 2rem;
            line-height: 1.6;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
        }
        .nav{
            padding: 1.2rem 0;
            /* text-align: center; */
            border-bottom: 2px solid rgba(30, 41, 59, 0.7);
        }
        .nav img{
            height: 40px;
        }
        .main{
            margin: 2rem 0;
            display: flex;
            justify-content: center;
            align-items: center;
            /* flex-wrap: wrap; */
            gap: 50px;
        }
        .header {
            /* text-align: left; */
            padding: 2rem 0;
            margin-bottom: 2rem;
            width: 100%;
        }

        h1 {
            padding-right: 3rem;
            font-size: 2.5rem;
            margin-bottom: 0.5rem;
            background: linear-gradient(90deg, #4a6cf7, #8b5cf6);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        .btn-box{
            display: flex;
            justify-content: start;
            gap: 1rem;
            margin: 1rem 0 2rem;

        }
        .btn {
            color: white;
            border: none;
            /* padding: 1rem; */
            border-radius: 8px;
            font-size: 1.2rem;
            font-weight: 400;
            cursor: pointer;
            transition: background 0.3s, transform 0.2s;
        }
        
        .btn:hover {
            background: #3a5ae8;
            transform: translateY(-2px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);

        }
        .b1{
            padding:1rem  4rem;
            background: var(--primary);
            /* color: #000; */
        }
        .b2{
            padding: 1rem 2rem;
            background: rgba(30, 41, 59, 0.7);
            border: 1px solid #40464e;
        }



        .img>img{
            width: 100%;
            border-radius: 1rem;
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);

        }

        
        .subtitle {
            color: var(--gray);
            font-size: 1.2rem;
            text-align: center;
        }
        .p{
            color: var(--gray);
            font-size: 1.2rem;

        }
        /* .card-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin: 3rem 0;
        } */
        
        .card {
            border-radius: 16px;
            padding: 2rem;
            backdrop-filter: blur(10px);
        }
        

        
        .card h2 {
            color: var(--primary);
            margin-bottom: 1rem;
            font-size: 2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
        }
        
        .card h2 i {
            font-size: 1.8rem;
        }
        
        .solution-card {
            grid-column: span 3;
            background: rgba(30, 41, 59, 0.7);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
            border: 1px solid rgba(255, 255, 255, 0.1);


        }
        
        .solution-steps {
            margin: 2rem 0;
            display: flex;
            justify-content: space-around;
            align-items: center;
            gap: 3rem;
            flex-wrap: wrap;
        }
        
        .step {
            display: flex;
            margin-bottom: 1.5rem;
            align-items: flex-start;
            padding: 1rem;
            border-radius: 1rem;
            background: #0f172a;
            width: 30%;
        }
        .step h3{
            font-size: 1.4rem;
        }
        .step-number {
            background: var(--primary);
            width: 32px;
            height: 32px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: 1rem;
            flex-shrink: 0;
            font-weight: bold;
        }
        .box{
            margin: 6rem 0;
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 3rem;
        }
        h2{
            font-size: 3rem;
        }
        .hp{
            width: 100%;
        }
        .go{
            padding: 3rem;
            /* margin: 2rem 0; */
            border-radius: 1rem;
            background: linear-gradient(90deg, #4a6cf7, #8b5cf6);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
            
        }
        .go>h2{
            width: 100%;
            text-align: center;
        }
        .go p{
            width: 100%;
            text-align: center;
            padding: 1rem;

        }
        .b3{
            color: #fff;
            padding: 1rem 5rem;
            background: rgba(30, 41, 59, 0.7);
            /* border: 1px solid #40464e; */
            border-radius: 8px;
            font-size: 1.2rem;
            font-weight: 400;
            cursor: pointer;
            transition: all 0.5s;

        }
        .b3:hover{
            background: var(--light);
            color: var(--dark);
        }
        .footer{
            padding: 2rem 0;
        }
        .footer>h3{
            font-size: 1.5rem;
            padding: 1rem 0;
            margin-bottom: 2rem;
            border-bottom: 2px solid rgba(30, 41, 59, 0.7);

        }
        .footer svg{
            width: 42px;
            border-radius: 1rem;
            /* background: #fff; */
            fill:#fff;
        }
        .footer ul{
            display: flex;
            gap: 2rem;
        }
        .footer ul li{
            padding: 1rem 0;
            padding-right: 1rem;
            /* width: calc(100%/3); */
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 0.5rem;
        }
        .footer ul li p{
            font-size: 0.9rem;
        }
        .Copyright {
            border-top: 2px solid rgba(30, 41, 59, 0.7);
            text-align: center;
            padding: 2rem 0;
            color: var(--gray);
            font-size: 0.9rem;
        }
        .Copyright a{
            color: var(--light);
        }
        /* 图片查看器 */
/* 页面图片的初始样式 */
.gallery-img {
    /* width: 200px; */
    /* height: auto; */
    cursor: pointer;
    /* margin: 10px; */
    transition: transform 0.2s ease;
}
.gallery-img:hover {
    transform: scale(1.02);
}

/* 遮罩层样式 */
.modal {
    display: none; /* 默认隐藏 */
    position: fixed;
    z-index: 9999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.9); /* 黑色半透明背景 */
    backdrop-filter: blur(5px); /* 背景模糊，可选 */
    opacity: 0;
    transition: opacity 0.3s ease;
}

/* 放大后的图片样式 */
.modal-content {
    display: block;
    margin: auto;
    max-width: 90%;
    margin-top: 5vh;
    width: auto;
    max-height: 90vh;
    transform: scale(0.9);
    transition: transform 0.3s ease;
    
}

/* 关闭按钮 */
.close {
    position: absolute;
    top: 1rem;
    right: 30px;
    color: #f1f1f1;
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
}
.close:hover {
    color: #bbb;
}

#scrollToTopBtn{
    display: flex;
    align-items: center;
    justify-content: center;
    position: fixed;
    z-index: 9999;
    bottom: 110px;
    right: 15px;
    background-color: var(--primary);
    color: #353434;
    border: none;
    border-radius: 50%;
    width: 3rem;
    height: 3rem;
    text-align: center;
    font-size: 20px;
    cursor: pointer;
    box-shadow: rgba(0, 0, 0, 0.24) 0px 3px 8px;
    transition: all .3s;
}
#scrollToTopBtn>svg{
    width: 1.4rem;
}
        @media (max-width: 980px) {
            .main{
                flex-wrap: wrap;
                gap: 1rem;
            }
            h1{
                padding: 0;
            }
            .header{
                margin: 0;
            }
            /* .btn-box {
                justify-content: space-between;
            } */
            .b1{
                padding: 2vh 12vw;
            }
            .b2{
                padding: 2vh 6vw;
            }
            .card{
                padding: 1rem;
            }
            .solution-steps{
                margin: 0;
                gap: 0;
            }
            .step{
                width: 100%;
                margin: 1.5rem 0;
            }
            .box{
                padding: 3rem 1rem;
                border-radius: 1rem;
                flex-wrap: wrap;
                background: rgba(30, 41, 59, 0.7);
                box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
                border: 1px solid rgba(255, 255, 255, 0.1);
            }
            .go{
                padding: 5rem 5vw;
            }
            .footer ul{
                flex-wrap: wrap;
            }
            .modal-content{
                max-width: 100%;
                margin-top: 25vh;
                max-height: 75vh;
            
            }
            .close{
                top: 5vh;
            }
            
        }