* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: "Microsoft Yahei", Arial, sans-serif;
        }
        :root {
            --primary-color: #0078d7;
            --secondary-color: #00a8ff;
            --dark-blue: #004b87;
            --light-blue: #e6f4ff;
            --text-color: #333;
            --text-light: #666;
            --white: #fff;
            --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
        }
        body {
            color: var(--text-color);
            background-color: #f9f9f9;
            line-height: 1.6;
        }
        a {
            text-decoration: none;
            color: var(--primary-color);
        }
        .container {
            width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .section {
            padding: 80px 0;
        }
        .section-title {
            text-align: center;
            font-size: 32px;
            margin-bottom: 60px;
            color: var(--dark-blue);
            position: relative;
        }
        .section-title::after {
            content: "";
            display: block;
            width: 80px;
            height: 4px;
            background-color: var(--secondary-color);
            margin: 15px auto 0;
            border-radius: 2px;
        }
        .btn {
            display: inline-block;
            padding: 12px 30px;
            background-color: var(--primary-color);
            color: var(--white);
            border-radius: 4px;
            font-size: 16px;
            transition: all 0.3s ease;
            border: none;
            cursor: pointer;
        }
        .btn:hover {
            background-color: var(--dark-blue);
            transform: translateY(-2px);
            box-shadow: var(--shadow);
        }

        /* 导航栏样式 */
        header {
            background-color: var(--white);
            box-shadow: var(--shadow);
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 999;
        }
        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 80px;
        }
        .logo {
            font-size: 24px;
            font-weight: bold;
            color: var(--primary-color);
            display: flex;
            align-items: center;
        }
        .logo span {
            color: var(--dark-blue);
        }
        .logo img{
            width: 180px;
            height: auto;
        }
        .nav-menu {
            display: flex;
            list-style: none;
        }
        .nav-menu li {
            margin-left: 30px;
        }
        .nav-menu a {
            font-size: 16px;
            color: var(--text-color);
            transition: color 0.3s ease;
        }
        .nav-menu a:hover {
            color: var(--primary-color);
        }
        .contact-phone {
            color: var(--primary-color);
            font-weight: bold;
        }

        /* 移动端菜单按钮样式 */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 24px;
    cursor: pointer;
    z-index: 1000;
}

.mobile-menu-btn span {
    display: block;
    height: 3px;
    width: 100%;
    background-color: var(--primary-color);
    border-radius: 2px;
    transition: all 0.3s ease;
}

/* 汉堡菜单动画效果 */
.mobile-menu-btn.active span:nth-child(1) {
    transform: translateY(10px) rotate(45deg);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: translateY(-10px) rotate(-45deg);
}

/* 响应式适配 */
@media (max-width: 768px) {
    .mobile-menu-btn {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 80px;
        left: 0;
        width: 100%;
        background-color: var(--white);
        flex-direction: column;
        align-items: center;
        padding: 20px 0;
        box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
        z-index: 999;
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-menu li {
        margin: 15px 0;
        width: 100%;
        text-align: center;
    }
    
    .nav-menu li a {
        display: block;
        padding: 10px 0;
        font-size: 18px;
    }
}

        /* 英雄区样式 - 重点优化 */
        .hero {
            height: 100vh;
            /* 优化渐变背景，增强对比度，移动端单独调整 */
            background: linear-gradient(135deg, #005a9e 0%, var(--primary-color) 100%);
            display: flex;
            align-items: center;
            padding-top: 80px;
            position: relative;
            overflow: hidden;
        }
        .hero-content {
            flex: 1;
            z-index: 2;
            /* 增加文字阴影，提升可读性 */
            text-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
        }
        .hero-title {
            font-size: 48px;
            color: var(--white);
            margin-bottom: 20px;
            line-height: 1.2;
            /* 加粗标题，增强视觉冲击力 */
            font-weight: 700;
        }
        .hero-title span {
            color: #ffd700;
            /* 金色文字增加阴影，突出重点 */
            text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
        }
        .hero-desc {
            font-size: 18px;
            color: var(--white);
            margin-bottom: 40px;
            max-width: 600px;
            /* 增加描述文字对比度，调整透明度 */
            opacity: 0.95;
            /* 增加行高，提升可读性 */
            line-height: 1.8;
        }
        .hero-img {
            flex: 1;
            text-align: right;
            z-index: 2;
        }
        .hero-img img {
            max-width: 600px;
            animation: float 3s ease-in-out infinite;
        }
        @keyframes float {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-15px); }
        }
        .hero-bg-shape {
            position: absolute;
            top: 0;
            right: 0;
            width: 60%;
            height: 100%;
            background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='100%25' height='100%25' viewBox='0 0 1600 800'%3E%3Cg %3E%3Cpolygon fill='%23ffffff' opacity='0.1' points='1600 160 0 460 0 350 1600 50'/%3E%3Cpolygon fill='%23ffffff' opacity='0.2' points='1600 260 0 560 0 450 1600 150'/%3E%3Cpolygon fill='%23ffffff' opacity='0.3' points='1600 360 0 660 0 550 1600 250'/%3E%3Cpolygon fill='%23ffffff' opacity='0.4' points='1600 460 0 760 0 650 1600 350'/%3E%3Cpolygon fill='%23ffffff' opacity='0.5' points='1600 800 0 800 0 750 1600 450'/%3E%3C/g%3E%3C/svg%3E");
            background-size: cover;
            z-index: 1;
        }

        /* 系统价值模块 */
        .system-value {
            background-color: var(--white);
        }
        .value-cards {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }
        .value-card {
            background-color: var(--light-blue);
            padding: 30px;
            border-radius: 8px;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .value-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow);
        }
        .value-card h3 {
            color: var(--dark-blue);
            font-size: 20px;
            margin-bottom: 15px;
            display: flex;
            align-items: center;
        }
        .value-card h3::before {
            content: "";
            display: inline-block;
            width: 30px;
            height: 30px;
            background-color: var(--primary-color);
            color: var(--white);
            border-radius: 50%;
            text-align: center;
            line-height: 30px;
            margin-right: 10px;
            font-weight: bold;
        }
        .value-card:nth-child(2) h3::before { content: "1"; }
        .value-card:nth-child(3) h3::before { content: "2"; }
        .value-card:nth-child(4) h3::before { content: "3"; }
        .value-card:nth-child(5) h3::before { content: "4"; }
        .value-card:nth-child(6) h3::before { content: "5"; }
        .value-card:nth-child(7) h3::before { content: "6"; }
        .brand-cert {
            grid-column: 1 / -1;
            text-align: center;
            padding: 20px;
        }
        .brand-cert img {
            max-width: 200px;
            margin: 0 30px;
            vertical-align: middle;
            margin-top: 20px;
        }

        /* 核心功能模块 */
        .core-role {
            background: linear-gradient(var(--white), var(--light-blue));
        }
        .role-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .role-item {
            background-color: var(--white);
            padding: 25px;
            border-left: 5px solid var(--primary-color);
            border-radius: 0 8px 8px 0;
            box-shadow: var(--shadow);
        }
        .role-item h3 {
            color: var(--dark-blue);
            font-size: 18px;
            margin-bottom: 10px;
        }
        .role-item p {
            color: var(--text-light);
            font-size: 14px;
        }

        /* 服务优势模块 */
        .service-advantage {
            background-color: var(--white);
        }
        .advantage-wrap {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
        }
        .tech-advantage {
            background-color: var(--light-blue);
            padding: 30px;
            border-radius: 8px;
        }
        .tech-advantage h3 {
            color: var(--dark-blue);
            margin-bottom: 20px;
            font-size: 20px;
        }
        .tech-point {
            margin-bottom: 15px;
            display: flex;
            align-items: flex-start;
        }
        .tech-point::before {
            content: "✓";
            color: var(--primary-color);
            font-weight: bold;
            margin-right: 10px;
            font-size: 18px;
        }
        .interface-show img {
            max-width: 100%;
            border-radius: 8px;
            box-shadow: var(--shadow);
        }

        /* 客户案例模块 */
        .customer-case {
            background-color: var(--light-blue);
        }
        .customer-logos {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 30px;
            align-items: center;
        }
        .customer-logos img {
            max-height: 100px;
            filter: grayscale(0.5);
            transition: filter 0.3s ease, transform 0.3s ease;
        }
        .customer-logos img:hover {
            filter: grayscale(0);
            transform: scale(1.1);
        }
        /* 弹窗样式 */
        .modal {
            display: none; /* 默认隐藏 */
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0,0,0,0.8);
            z-index: 9999;
            justify-content: center;
            align-items: center;
        }

        .modal-content {
            background: #fff;
            padding: 2rem;
            border-radius: 10px;
            text-align: center;
            max-width: 400px;
            width: 90%;
        }

        .modal-content img {
            width: 180px;
            height: 180px;
            margin-bottom: 1rem;
        }

        .modal-content h3 {
            margin-bottom: 1rem;
            color: #2c3e50;
        }

        .modal-phone {
            font-size: 1.2rem;
            font-weight: bold;
            margin: 1rem 0;
        }

        .modal-btns {
            display: flex;
            justify-content: center;
            gap: 1rem;
            margin-top: 1rem;
        }

        .modal-btn {
            padding: 0.6rem 1.5rem;
            border: none;
            border-radius: 5px;
            cursor: pointer;
            font-size: 0.9rem;
            transition: background 0.3s;
        }

        .copy-btn {
            background: #2ecc71;
            color: #fff;
        }

        .copy-btn:hover {
            background: #27ae60;
        }

        .call-btn {
            background: #e67e22;
            color: #fff;
        }

        .call-btn:hover {
            background: #d35400;
        }

        .close-btn {
            margin-top: 1.5rem;
            background: #e74c3c;
            color: #fff;
        }

        .close-btn:hover {
            background: #c0392b;
        }

        /* 回到顶部按钮样式 */
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background: #3498db;
            color: #fff;
            border: none;
            border-radius: 50%;
            font-size: 1.5rem;
            cursor: pointer;
            display: none; /* 默认隐藏 */
            justify-content: center;
            align-items: center;
            box-shadow: 0 2px 10px rgba(0,0,0,0.2);
            transition: background 0.3s, transform 0.3s;
            z-index: 999;
        }

        .back-to-top:hover {
            background: #2980b9;
            transform: translateY(-5px);
        }

        /* 联系我们模块 */
        .contact {
            background-color: var(--dark-blue);
            color: var(--white);
            text-align: center;
        }
        .contact h2 {
            color: var(--white);
        }
        .contact-info {
            font-size: 20px;
            margin-bottom: 30px;
        }
        .contact-qrcode {
            display: inline-block;
            background-color: var(--white);
            padding: 10px;
            border-radius: 8px;
            margin-bottom: 20px;
        }
        .contact-qrcode img {
            width: 150px;
            height: 150px;
        }

        /* 页脚样式 */
        footer {
            background-color: #003057;
            color: var(--white);
            padding: 30px 0;
            text-align: center;
        }
        .footer-text {
            font-size: 14px;
            opacity: 0.8;
        }

        /* 响应式适配 - 重点优化移动端hero区域 */
        @media (max-width: 1200px) {
            .container {
                width: 90%;
            }
            .hero-title {
                font-size: 40px;
            }
            .hero-img img {
                max-width: 500px;
            }
        }
        @media (max-width: 768px) {
            /*.nav-menu {
                display: none;
            }*/
            .hero {
                flex-direction: column;
                height: auto;
                padding: 100px 0 60px;
                text-align: center;
                /* 移动端加深背景色，增强文字对比度 */
                background: linear-gradient(180deg, #004b87 0%, #0078d7 100%);
            }
            .hero-content {
                margin-bottom: 40px;
                /* 移动端增加内边距，避免文字贴边 */
                padding: 0 15px;
            }
            .hero-title {
                font-size: 36px;
                /* 移动端标题加粗，进一步提升可读性 */
                font-weight: 800;
            }
            .hero-desc {
                font-size: 17px;
                /* 移动端描述文字调整行高和透明度 */
                line-height: 1.8;
                opacity: 1;
                max-width: 100%;
                /* 增加文字阴影，提升移动端可读性 */
                text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
            }
            .hero-img {
                width: 100%;
                text-align: center;
            }
            .hero-img img {
                max-width: 80%;
            }
            /* 移动端调整背景图形大小，避免遮挡文字 */
            .hero-bg-shape {
                width: 100%;
                opacity: 0.8;
            }
            .value-cards {
                grid-template-columns: 1fr;
            }
            .advantage-wrap {
                grid-template-columns: 1fr;
            }
            .section {
                padding: 60px 0;
            }
            .section-title {
                font-size: 28px;
            }
        }
        /* 适配更小的移动设备（480px以下） */
        @media (max-width: 480px) {
            .hero-title {
                font-size: 25px;
            }
            .logo img{
                width: 150px;
                height: auto;
            }
            .hero-desc {
                font-size: 16px;
            }
            .hero-img{
                display: none;
            }
            .btn {
                padding: 10px 25px;
                font-size: 15px;
                /* 移动端按钮加宽，方便点击 */
                width: 80%;
                max-width: 300px;
            }
        }