* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: "Microsoft Yahei", sans-serif;
        }
        /* 全局变量（科技感配色） */
        :root {
            --primary: #0078ff;
            --secondary: #00c6ff;
            --dark: #1e293b;
            --light: #f8fafc;
            --gray: #64748b;
            --shadow: 0 4px 20px rgba(0, 120, 255, 0.1);
            --gradient: linear-gradient(135deg, var(--primary), var(--secondary));
            --nav-bg: #1e293b; /* 导航栏背景色 */
        }
        /* 宽屏容器 */
        .container {
            width: 100%;
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 20px;
        }
        /* 头部样式 */
        header {
            background: var(--dark);
            padding: 25px 0;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .logo h1 {
            font-size: 28px;
            color: #fff;
            font-weight: 700;
            background: var(--gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .logo span {
            font-size: 30px;
            font-weight: 800;
        }
        .contact-info {
            text-align: right;
            margin-top: 10px;
        }
        .contact-info p {
            font-size: 15px;
            color: var(--light);
            line-height: 1.6;
        }
        .contact-info p a {
            color: var(--secondary);
            text-decoration: none;
        }
        /* 导航样式（新增背景色+移动端2列） */
        nav {
            background: var(--nav-bg); /* 导航栏固定背景色 */
            backdrop-filter: blur(10px);
            margin-top: 20px;
            position: sticky;
            top: 0;
            z-index: 999;
        }
        .nav-list {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            justify-content: center;
            margin: 0;
            padding: 0;
        }
        /* PC端导航 */
        .nav-list li {
            padding: 15px 25px;
            transition: background 0.3s;
        }
        .nav-list li:hover {
            background: rgba(0, 120, 255, 0.2);
        }
        .nav-list li a {
            color: #fff;
            text-decoration: none;
            font-size: 17px;
            font-weight: 500;
        }
        /* 移动端导航（每排2个菜单） */
        @media (max-width: 768px) {
            .nav-list {
                display: grid;
                grid-template-columns: repeat(2, 1fr); /* 2列布局 */
                text-align: center;
            }
            .nav-list li {
                padding: 12px 0;
                border-bottom: 1px solid rgba(255,255,255,0.1);
                border-right: 1px solid rgba(255,255,255,0.1);
            }
            .nav-list li:nth-child(2n) {
                border-right: none; /* 偶数项去掉右边框 */
            }
        }
        /* 主体内容 */
        section {
            padding: 60px 0;
        }
        .section-title {
            font-size: 28px;
            color: var(--dark);
            margin-bottom: 30px;
            padding-bottom: 15px;
            border-bottom: 3px solid var(--primary);
            position: relative;
            display: inline-block;
        }
        .section-title::after {
            content: '';
            position: absolute;
            width: 50%;
            height: 3px;
            background: var(--secondary);
            bottom: -3px;
            left: 0;
        }
        /* 公司简介（最新优化版） */
        .intro {
            background: var(--light);
            border-radius: 12px;
            padding: 40px;
            box-shadow: var(--shadow);
        }
        .intro p {
            font-size: 17px;
            color: var(--gray);
            line-height: 1.8;
            margin-bottom: 20px;
        }
        .intro p span {
            color: var(--primary);
            font-weight: 600;
        }
        /* 店铺展示（替换产品展示，图片3:4） */
        .store-list {
            display: grid;
            /* PC端自适应，移动端2列 */
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
            margin-top: 30px;
        }
        /* 移动端店铺展示每排2组 */
        @media (max-width: 768px) {
            .store-list {
                grid-template-columns: repeat(2, 1fr); /* 固定2列 */
                gap: 20px;
            }
        }
        .store-item {
            border-radius: 12px;
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: transform 0.3s, box-shadow 0.3s;
        }
        .store-item:hover {
            transform: translateY(-10px);
            box-shadow: 0 10px 30px rgba(0, 120, 255, 0.15);
        }
        /* 图片3:4比例 */
        .store-img {
            width: 100%;
            /* 3:4比例：高度=宽度*4/3 */
            aspect-ratio: 3/4;
            overflow: hidden;
        }
        .store-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s;
        }
        .store-item:hover .store-img img {
            transform: scale(1.05);
        }
        .store-info {
            padding: 25px;
            background: #fff;
        }
        .store-info h3 {
            font-size: 20px;
            color: var(--dark);
            margin-bottom: 12px;
            font-weight: 600;
        }
        .store-info p {
            font-size: 15px;
            color: var(--gray);
            line-height: 1.7;
        }
        /* 案例展示 */
        .case-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 30px;
            margin-top: 30px;
        }
        .case-item {
            border-radius: 12px;
            overflow: hidden;
            box-shadow: var(--shadow);
            background: #fff;
        }
        .case-info {
            padding: 25px;
        }
        .case-info h3 {
            font-size: 20px;
            color: var(--dark);
            margin-bottom: 12px;
            font-weight: 600;
        }
        .case-info p {
            font-size: 15px;
            color: var(--gray);
            line-height: 1.7;
        }
        /* 联系方式 */
        .contact {
            background: var(--gradient);
            padding: 60px 0;
            color: #fff;
        }
        .contact .section-title {
            color: #fff;
            border-bottom-color: #fff;
        }
        .contact .section-title::after {
            background: rgba(255,255,255,0.8);
        }
        .contact-content {
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
            align-items: center;
        }
        .contact-left {
            flex: 1;
            min-width: 300px;
        }
        .contact-right {
            flex: 1;
            min-width: 300px;
        }
        .contact-item {
            margin-bottom: 25px;
        }
        .contact-item h3 {
            font-size: 20px;
            color: #fff;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .contact-item h3::before {
            content: '';
            width: 4px;
            height: 20px;
            background: #fff;
            display: inline-block;
        }
        .contact-item p {
            font-size: 16px;
            color: rgba(255,255,255,0.9);
            line-height: 1.8;
        }
        /* 底部样式 */
        footer {
            background: var(--dark);
            color: rgba(255,255,255,0.8);
            padding: 40px 0;
            text-align: center;
        }
        footer p {
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 10px;
        }
        footer p:last-child {
            margin-bottom: 0;
            color: rgba(255,255,255,0.6);
            font-size: 14px;
        }
        /* 二维码悬浮框 */
        .qrcode-float {
            position: fixed;
            bottom: 30px;
            right: 30px;
            background: #fff;
            padding: 15px;
            border-radius: 10px;
            box-shadow: 0 5px 20px rgba(0,0,0,0.15);
            z-index: 9999;
            text-align: center;
        }
        .qrcode-img {
            width: 120px;
            height: 120px;
            margin-bottom: 10px;
        }
        .qrcode-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .qrcode-text {
            font-size: 14px;
            color: var(--dark);
            font-weight: 500;
        }
        /* 移动端通用适配 */
        @media (max-width: 768px) {
            .header-top {
                flex-direction: column;
                align-items: flex-start;
            }
            .contact-info {
                text-align: left;
                margin-top: 20px;
            }
            section {
                padding: 40px 0;
            }
            .intro {
                padding: 25px;
            }
            .qrcode-float {
                bottom: 20px;
                right: 20px;
                padding: 10px;
            }
            .qrcode-img {
                width: 100px;
                height: 100px;
            }
        }