* {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
        font-family: "Source Han Sans"!important;
    }

    body {
        font-family: 'Segoe UI', 'Roboto', system-ui, -apple-system, 'Helvetica Neue', sans-serif;
        background-color: #ffffff;
        color: #1f2937;
        line-height: 1.5;
        scroll-behavior: smooth;
        padding-top: 98px; /* 根据导航栏实际高度调整，通常在 70-90px */
    }

    /* 容器约束，内容居中 */
    .container {
        max-width: 1280px;
        margin: 0 auto;
        padding: 0 24px;
    }

    .navbar {
        position: fixed !important;
        top: 0;
        left: 0;
        width: 100%;
        z-index: 1000;
        background-color: #ffffff;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    }

    .nav-container {
        display: flex;
        align-items: center;
        justify-content: center;   /* 改为从左侧开始排列 */
        flex-wrap: wrap;
        gap: 5rem;                     /* 可选：添加 logo 与菜单之间的间距，避免完全紧贴 */
        padding: 0.8rem 24px;
        max-width: 1400px;
        margin: 0 auto;
    }

    /* logo区域 */
    .logo img{
        height: 63px;
        width: 287px;
    }

    .logo a {
        font-size: 1.8rem;
        font-weight: 700;
        text-decoration: none;
        background: linear-gradient(135deg, #2563eb, #1e40af);
        -webkit-background-clip: text;
        background-clip: text;
        color: transparent;
        letter-spacing: -0.5px;
    }
    .logo span {
        font-size: 1rem;
        font-weight: normal;
        color: #4b5563;
    }

    /* 导航菜单（桌面） */
    .nav-menu {
        display: flex;
        list-style: none;
        gap: 5rem;
        margin: 0;
        padding: 0;
    }

    .nav-item {
        position: relative;
    }

    .nav-item > a {
        text-decoration: none;
        color: #444444;
        padding: 0.5rem 0;
        display: inline-block;
        transition: color 0.2s ease;
        font-size: 1rem;
    }

    .nav-item > a:hover {
        color: #fe6c2d;     /* 改为品牌橙色 */
    }

    /* 下拉菜单 - 默认隐藏 */
    .dropdown {
        position: absolute;
        top: 100%;
        left: 0;
        background: #ffffff;
        min-width: 180px;
        box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.02);
        border-radius: 12px;
        padding: 0.6rem 0;
        list-style: none;
        opacity: 0;
        visibility: hidden;
        transform: translateY(10px);
        transition: all 0.25s ease;
        z-index: 100;
        border: 1px solid #f0f0f0;
    }

    .nav-item.has-dropdown:hover .dropdown {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }

    .dropdown li a {
        display: block;
        padding: 0.5rem 1.2rem;
        color: #374151;
        text-decoration: none;
        font-size: 0.9rem;
        transition: background 0.2s;
    }

    .dropdown li a:hover {
        background-color: #f3f4f6;
        color: #fe6c2d;
    }

    /* 首页无下拉，其余均有has-dropdown类 */
    
    /* banner 大图区域 */
    .hero {
        
        /* 去掉渐变和混合模式，只保留图片，且水平和垂直都居中 */
        color: white;
        text-align: center;
        padding: 5rem 1rem;
        width: 100%;          /* 改为100%宽度，自适应父容器 */
        height: auto;         /* 高度自动，避免失真 */
        min-height: 652px;    /* 保持你原来的视觉高度（可选） */
        background-size: cover; /* 保证图片覆盖整个区域，不变形 */
    }
    .hero-content h1 {
        font-size: 3rem;
        margin-bottom: 1rem;
        font-weight: 700;
    }
    .hero-content p {
        font-size: 1.25rem;
        max-width: 700px;
        margin: 0 auto;
        opacity: 0.9;
    }
    @media (max-width: 768px) {
        .hero-content h1 { font-size: 2.2rem; }
    }

    /* 通用区块样式 */
    .section {
        padding: 4rem 0;
        border-bottom: 1px solid #eef2f6;
    }
    .section:last-of-type {
        border-bottom: none;
    }
    .section-title {
        font-size: 2rem;
        font-weight: 700;
        text-align: center;
        margin-bottom: 2.5rem;
        color: #0f172a;
        position: relative;
    }
    .section-title:after {
        content: '';
        display: block;
        width: 60px;
        height: 4px;
        background: #2563eb;
        margin: 0.8rem auto 0;
        border-radius: 2px;
    }

    /* 文字介绍区域 */
    .intro-text {
        max-width: 900px;
        margin: 0 auto;
        text-align: center;
        font-size: 1.1rem;
        color: #334155;
        line-height: 1.7;
    }

    /* 视频区域 */
    .video-wrapper {
        max-width: 1000px;
        margin: 0 auto;
        border-radius: 24px;
        overflow: hidden;
        box-shadow: 0 20px 35px -12px rgba(0, 0, 0, 0.15);
    }
    video {
        width: 100%;
        display: block;
        background-color: #000;
    }

    /* 产品卡片网格 */
    .products-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 2rem;
        margin-top: 1rem;
    }
    .product-card {
        background: #f9fafb;
        border-radius: 24px;
        overflow: hidden;
        transition: transform 0.25s ease, box-shadow 0.25s ease;
        box-shadow: 0 2px 8px rgba(0,0,0,0.03);
    }
    .product-card:hover {
        transform: translateY(-6px);
        box-shadow: 0 20px 30px -12px rgba(0,0,0,0.1);
    }
    .product-card img {
        width: 100%;
        height: 200px;
        object-fit: cover;
    }
    .product-info {
        padding: 1.5rem;
    }
    .product-info h3 {
        font-size: 1.4rem;
        margin-bottom: 0.5rem;
        color: #0f172a;
    }
    .product-info p {
        color: #4b5563;
        margin-bottom: 1rem;
    }
    .btn-sm {
        display: inline-block;
        background: #2563eb;
        color: white;
        padding: 0.4rem 1.2rem;
        border-radius: 40px;
        text-decoration: none;
        font-weight: 500;
        font-size: 0.85rem;
        transition: background 0.2s;
    }
    .btn-sm:hover {
        background: #1d4ed8;
    }

    /* 底部横幅 (公司信息完整) */
    .footer-banner {
        background-color: #0f172a;
        color: #e2e8f0;
        padding: 3rem 0 2rem;
    }
    .footer-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
        gap: 2rem;
        align-items: start;
    }
    .footer-col h4 {
        color: white;
        font-size: 1.2rem;
        margin-bottom: 1.2rem;
        font-weight: 600;
        border-left: 3px solid #3b82f6;
        padding-left: 0.8rem;
    }
    .footer-logo {
        font-size: 1.8rem;
        font-weight: 700;
        background: linear-gradient(135deg, #cbd5e1, #94a3b8);
        -webkit-background-clip: text;
        background-clip: text;
        color: transparent;
        margin-bottom: 1rem;
    }
    .contact-info p {
        margin-bottom: 0.6rem;
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 0.9rem;
    }
    .contact-info i {
        width: 24px;
        color: #60a5fa;
    }
    .qr-list {
        display: flex;
        gap: 1.5rem;
        flex-wrap: wrap;
    }
    .qr-item {
        text-align: center;
        background: #1e293b;
        padding: 0.8rem;
        border-radius: 16px;
        width: 110px;
    }
    .qr-item img {
        width: 80px;
        height: 80px;
        background: white;
        border-radius: 12px;
        margin-bottom: 6px;
        object-fit: cover;
    }
    .qr-item span {
        font-size: 0.7rem;
        display: block;
        color: #cbd5e1;
    }
    .legal-info {
        font-size: 0.8rem;
        line-height: 1.6;
    }
    .legal-info a {
        color: #94a3b8;
        text-decoration: none;
        margin-right: 12px;
    }
    .legal-info a:hover {
        color: white;
    }
    .social-icons {
        margin-top: 1rem;
        display: flex;
        gap: 1rem;
    }
    .social-icons a {
        background: #1e293b;
        width: 38px;
        height: 38px;
        border-radius: 50%;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        color: white;
        font-size: 1.2rem;
        transition: all 0.2s;
    }
    .social-icons a:hover {
        background: #2563eb;
        transform: scale(1.05);
    }
    .copyright {
        text-align: center;
        padding-top: 2rem;
        margin-top: 2rem;
        border-top: 1px solid #334155;
        font-size: 0.75rem;
        color: #94a3b8;
    }

    /* 响应式调整 */
    @media (max-width: 900px) {
        .nav-container {
            flex-direction: column;
            gap: 0.8rem;
        }
        .nav-menu {
            gap: 1rem;
            flex-wrap: wrap;
            justify-content: center;
        }
        .dropdown {
            position: static;
            box-shadow: none;
            opacity: 1;
            visibility: visible;
            transform: none;
            display: none;
            background: #f8fafc;
            padding-left: 1rem;
            margin-top: 0.3rem;
            border-radius: 12px;
        }
        /* 移动端通过点击展开更友好，但保留hover改版: 仅作基础适配，如果hover依然可以稍差，但手机点击父级一般 */
        .nav-item.has-dropdown:hover .dropdown {
            display: block;
        }
        .nav-item.has-dropdown .dropdown {
            position: relative;
            width: 100%;
        }
        .hero-content h1 { font-size: 2rem; }
        .section-title { font-size: 1.8rem; }
    }

    /* 占位图片缺省优雅 */
    .placeholder-img {
        background: #e2e8f0;
        display: flex;
        align-items: center;
        justify-content: center;
        color: #64748b;
        font-size: 0.8rem;
    }
    .art-img {
        position: absolute;
        width: auto;          /* 按原图比例显示，可自行调整 */
        max-width: 30%;       /* 限制最大宽度，避免过大 */
        height: auto;
        z-index: 2;
    }
    .art-img-left {
        left: 50%;             /* 距离左侧 5% */
        top: 30%;             /* 距离顶部 20% */
        width: 586px; 
        height: 96px;
    }
    .art-img-right {
        left: 51%;            /* 距离右侧 5% */
        top: 35%;          /* 距离底部 20% */
        width: 460px; 
        height: 63px;
    }
    .con_216_25 {
        color: #555555;
    }

    .con_231_8 {
        color: #434A54;
    }
    .circle-arrow {
        display: inline-flex;           /* 改为 flex */
        align-items: center;            /* 垂直居中 */
        justify-content: center;        /* 水平居中 */
        width: 40px;
        height: 40px;
        border-radius: 50%;
        background-color: transparent;
        border: 1px solid #d1d5db;
        color: #fe6c2d;
        font-size: 24px;
        font-weight: bold;
        transition: all 0.3s ease;
        cursor: pointer;
        margin-top: 20px;
        /* 移除 line-height，避免偏移 */
    }
    .circle-arrow:hover {
        background-color: #012245;   /* 灰色 */
        color: white;
    }
    .circle-arrow span {
        display: inline-block;
        transform: translateY(-3px) translateX(1px);  /* 向上微调，数值可自行增减 */
    }
    .smAreaC{
        flex: 0 0 260px; 
        background: rgba(254, 108, 45, 0.5); 
        backdrop-filter: blur(8px); 
        border-radius: 24px; 
        padding: 24px 0px; 
        text-align: center; 
        box-shadow: 0 10px 25px -5px rgba(0,0,0,0.1); 
        transition: transform 0.2s;
    }
    .smAreaC:hover {
        transform: translateY(-5px);   /* 向上浮动5像素 */
        background: white;             /* 变为白色背景 */
        /* 可选：增强阴影效果 */
        box-shadow: 0 20px 35px -10px rgba(0,0,0,0.15);
    }
    .fas, .far, .fab {
        font-family: "Font Awesome 6 Free" !important;
    }
    .fab {
        font-family: "Font Awesome 6 Brands" !important;
    }