* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: "Microsoft YaHei", sans-serif;
            background-color: #f8f8f8;
            color: #333;
            overflow‑x: hidden;
        }
        .wrap {
            max-width:100%;
            margin: 0 auto;
        }
        /*面包屑导航*/
        .breadcrumb {
            padding: 16px 20px;
            background: #ffffff;
            font-size: 14px;
        }
        .breadcrumb a {
            color: #333;
            text-decoration: none;
        }
        .breadcrumb .brand-right {
            float: right;
            color: #d81e06;
        }
        /*标题组件 红色横线从左向右展开*/
        .title-box {
            text-align: center;
            margin: 60px 0 20px;
        }
        .main-title {
            font-size: 28px;
            color: #444;
            margin-bottom: 12px;
        }
        .line-outer {
            width: 70px;
            height: 2px;
            background: #dddddd;
            margin: 0 auto;
            position: relative;
        }
        .red-animate-line {
            position: absolute;
            left: 0;
            top: 0;
            width: 0;
            height: 2px;
            background-color: #d81e06;
            transition: width 0.7s ease;
        }
        .line-outer.active .red-animate-line {
            width: 100%;
        }
        .desc-text {
            max-width: 920px;
            margin: 0 auto 40px;
            font-size: 16px;
            color: #555;
            line-height: 1.7;
            text-align: center;
            padding:20px 20px;
        }
        /*滚动动画：从下往上滑入*/
        .scroll-animate {
            opacity: 0;
            transform: translateY(45px);
            transition: all 0.65s cubic‑bezier(0.25,0.46,0.45,0.94);
        }
        .scroll-animate.show {
            opacity: 1;
            transform: translateY(0);
        }
        /*大图banner*/
        .scene-banner {
            width: 100%;
            height: 420px;
            background: url("https://picsum.photos/id/1060/1920/840") center / cover no‑repeat;
            position: relative;
            overflow: hidden;
        }
        .scene-banner img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        /*解决方案卡片区域*/
        .solution-wrap {
            padding-bottom: 80px;
        }
        .solution-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            padding: 0 20px;
        }
        .solution-card {
            background: #ffffff;
            border-radius: 6px;
            overflow: hidden;
            box-shadow: 0 2px 10px rgba(0,0,0,0.06);
            transition: 0.4s ease;
            position: relative;
        }
        /*卡片顶部红色线条，hover从左向右展开*/
        .solution-card::before {
            content: "";
            position: absolute;
            left: 0;
            top: 0;
            width: 0;
            height: 3px;
            background: #d81e06;
            transition: width 0.45s ease;
            z-index: 2;
        }
        .solution-card:hover::before {
            width: 100%;
        }
        .solution-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 14px 32px rgba(0,0,0,0.12);
        }
        .card-img-box {
            width: 98%;
            height: 300px;
            overflow: hidden;
            padding-bottom: 20px;
            margin: auto;
        }
        .card-img-box img {
            width: 100%;
            height: 93%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .solution-card:hover .card-img-box img {
            transform: scale(1.07);
        }
        .card-text {
            padding: 18px 16px 0px;
            min-height: 160px;
        }
        .card-text h4 {
            font-size: 16px;
            color: #222;
            margin-bottom: 10px;
            text-align: center;
        }
        .card-text p {
            font-size: 12px;
            color: #666;
            line-height: 1.6;
        }

        /*响应式适配*/
        @media(max-width:992px) {
            .solution-grid {
                grid-template-columns: repeat(2,1fr);
            }
            .scene-banner {
                height: 320px;
            }
        }
        @media(max-width:576px) {
            .solution-grid {
                grid-template-columns: 1fr;
            }
            .scene-banner {
                height: 240px;
            }
            .main-title {
                font-size: 22px;
            }
            .title-box {
                margin: 35px 0 12px;
            }
        }