* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: "Microsoft YaHei", Arial, sans-serif;
        }

        body {
            color: #333;
            background: #f7f9fc;
        }

        a {
            text-decoration: none;
            color: inherit;
        }

        /* ===== Banner ===== */
        .banner {
            height: 520px;
            background: url("banner.jpg") center/cover no-repeat;
            position: relative;
            color: #fff;
        }

        .banner::after {
            content: "";
            position: absolute;
            inset: 0;
            background: rgba(0, 0, 0, 0.45);
        }

        .banner-content {
            background-image: url("./41361109.jpg");
            background-position: 50% 50%;
            background-size: cover;
            position: relative;
            z-index: 2;
            height: 100%;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 0 20px;
        }

        .banner h1 {
            font-size: 40px;
            margin-bottom: 16px;
        }

        .banner p {
            font-size: 14px;
            letter-spacing: 1px;
            opacity: 0.9;
        }

        /* ===== Section ===== */
        .section {
            padding: 80px 20px;
            background: #fff;
        }

        .section.gray {
            background: #f2f4f8;
        }

        .section-title {
            text-align: center;
            margin-bottom: 60px;
        }

        .section-title h2 {
            font-size: 28px;
            margin-bottom: 8px;
        }

        .section-title span {
            font-size: 12px;
            color: #999;
            letter-spacing: 2px;
        }

        /* ===== Advantages ===== */
        .advantages {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 30px;
            max-width: 1200px;
            margin: auto;
        }

        .adv-item {
            text-align: center;
            padding: 30px 20px;
        }

        .adv-item img {
            width: 60px;
            margin-bottom: 16px;
        }

        .adv-item h3 {
            font-size: 16px;
            margin-bottom: 8px;
        }

        .adv-item p {
            font-size: 13px;
            color: #666;
            line-height: 1.6;
        }

        /* ===== About ===== */
        .about {
            max-width: 900px;
            margin: auto;
            text-align: center;
            line-height: 1.8;
            color: #555;
        }

        .btn {
            display: inline-block;
            margin-top: 30px;
            padding: 10px 30px;
            background: #1677ff;
            color: #fff;
            font-size: 14px;
            border-radius: 4px;
        }

        /* ===== Solutions ===== */
        .solutions {
            max-width: 1200px;
            margin: auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
        }

        .solution-item {
            background: #fff;
            border-radius: 6px;
            overflow: hidden;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.06);
        }

        .solution-item img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }

        .solution-item .content {
            padding: 20px;
        }

        .solution-item h3 {
            font-size: 16px;
            margin-bottom: 10px;
        }

        .solution-item p {
            font-size: 13px;
            color: #666;
            line-height: 1.6;
        }

        .more {
            margin-top: 10px;
            display: inline-block;
            font-size: 13px;
            color: #1677ff;
        }

        /* ===== Products ===== */
        .products {
            max-width: 1200px;
            margin: auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 30px;
        }

        .product-item {
            background: #fff;
            padding: 20px;
            text-align: center;
            border-radius: 6px;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.05);
        }

        .product-item img {
            width: 100%;
            height: 160px;
            object-fit: cover;
            margin-bottom: 10px;
        }

        .product-item h4 {
            font-size: 15px;
        }

        /* ===== Footer ===== */
        footer {
            background: #111;
            color: #aaa;
            padding: 30px 20px;
           
            font-size: 12px;
        }

        .mian{
             max-width: 1200px;
            margin: auto;
        }

        .footer-img{
              max-width: 1200px;
            margin: auto;
        }

        .footer-text{
            text-align: center;
        }

        .footer-box{
            padding: 40px 0;
        }
        .footer-in{
            line-height: 30px;
        }

        .footer-h2{
            margin-bottom: 20px;
        }