* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: "Microsoft Yahei", sans-serif;
        }
        body {
            color: #333;
            background: #f8faff;
            line-height: 1.6;
        }
        /* 滚动动画基础 */
        .fade-in {
            opacity: 0;
            transform: translateY(40px);
            transition: all 0.7s ease-out;
        }
        .fade-in.active {
            opacity: 1;
            transform: translateY(0);
        }
        .banner-panel{
            background: linear-gradient(135deg, #1677ff 0%, #0052cc 100%);
        }
        /* 顶部banner */
        .banner {
            
            color: #fff;
            padding: 60px 20px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
            max-width: 1200px;
            margin: 0 auto;
            position: relative;
            overflow: hidden;
        }
        .banner::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image: radial-gradient(rgba(255,255,255,0.1) 1px, transparent 1px);
            background-size: 30px 30px;
            animation: bgMove 12s linear infinite;
        }
        @keyframes bgMove {
            0% { background-position: 0 0; }
            100% { background-position: 60px 60px; }
        }
        .banner-text {
            flex: 1;
            min-width: 300px;
            z-index: 2;
        }
        .banner-text h1 {
            font-size: 36px;
            margin-bottom: 10px;
            animation: textSlide 1s ease-out;
        }
        @keyframes textSlide {
            from { opacity: 0; transform: translateX(-30px); }
            to { opacity: 1; transform: translateX(0); }
        }
        .banner-text p {
            font-size: 15px;
            opacity: 0.9;
        }
        .banner-img {
            flex: 1;
            min-width: 320px;
            text-align: center;
            z-index: 2;
        }
        .banner-img svg {
            max-width: 420px;
            width: 100%;
            animation: float 4s ease-in-out infinite;
        }
        @keyframes float {
            0%,100% { transform: translateY(0); }
            50% { transform: translateY(-12px); }
        }
        /* 容器通用 */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        /* 关于我们区块 */
        .about-section {
            padding: 60px 0;
        }
        .card-white {
            background: #fff;
            border-radius: 14px;
            padding: 30px;
            box-shadow: 0 4px 20px rgba(22,119,255,0.08);
            display: flex;
            flex-wrap: wrap;
            gap: 30px;
            align-items: center;
        }
        .about-img {
            flex: 1;
            min-width: 300px;
        }
        .about-img img {
            width: 100%;
            border-radius: 8px;
            transition: transform 0.4s ease;
        }
        .about-img img:hover {
            transform: scale(1.02);
        }
        .about-desc {
            flex: 1;
            min-width: 300px;
        }
        .section-title {
            text-align: center;
            margin-bottom: 40px;
        }
        .section-title h2 {
            font-size: 26px;
            color: #111;
            margin-bottom: 6px;
        }
        .section-title .en {
            color: #888;
            font-size: 14px;
            letter-spacing: 2px;
        }
        .about-desc h3 {
            font-size: 20px;
            margin-bottom: 12px;
            color: #003370;
        }
        .about-desc p {
            color: #555;
            font-size: 15px;
        }
        /* 产品通用模块 */
        .product-section {
            padding: 70px 0;
        }
        .product-item {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 40px;
            margin-bottom: 80px;
        }
        .product-item:nth-child(even) {
            flex-direction: row-reverse;
        }
        .product-img-box {
            flex: 1;
            min-width: 300px;
            text-align: center;
        }
        .product-img-box img {
            max-width: 360px;
            width: 100%;
            transition: all 0.5s ease;
            filter: drop-shadow(0 8px 24px rgba(0,0,0,0.12));
        }
        .product-img-box img:hover {
            transform: translateY(-8px) scale(1.03);
            filter: drop-shadow(0 12px 30px rgba(22,119,255,0.18));
        }
        .product-text {
            flex: 1;
            min-width: 300px;
        }
        .product-text h4 {
            font-size: 20px;
            color: #1677ff;
            margin-bottom: 14px;
        }
        .product-text p {
            color: #505050;
            font-size: 15px;
            line-height: 1.7;
        }
        /* 资质板块 */
        .cert-section {
            padding: 70px 0;
            background: #fff;
        }
        .cert-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            justify-content: center;
        }
        .cert-item {
            width: calc(33.333% - 16px);
            min-width: 260px;
        }
        .cert-item img {
            width: 100%;
            border: 8px solid #fff;
            box-shadow: 0 3px 16px rgba(0,0,0,0.1);
            border-radius: 6px;
            transition: all 0.4s ease;
        }
        .cert-item img:hover {
            transform: translateY(-6px);
            box-shadow: 0 10px 30px rgba(22,119,255,0.15);
        }
        /* 底部footer */
        footer {
            background: #111;
            color: #ccc;
            padding: 30px 20px;
        }
        .footer-wrap {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 20px;
            font-size: 14px;
        }
        /* 移动端适配 */
        @media (max-width:768px) {
            .banner-text h1 {
                font-size: 28px;
            }
            .product-item:nth-child(even) {
                flex-direction: column;
            }
            .cert-item {
                width: calc(50% - 12px);
            }
        }
        @media (max-width:480px) {
            .cert-item {
                width: 100%;
            }
        }