* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
        }

        :root {
            --primary-color: #0066b3;
            --secondary-color: #0099cc;
            --deep-color: #004b80;
            --text-main: #222831;
            --text-secondary: #555555;
            --text-light: #777777;
            --bg-light: #f5f8fa;
            --white: #ffffff;
            --shadow-sm: 0 2px 15px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 5px 20px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 10px 30px rgba(0, 102, 179, 0.12);
            --transition: all 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            color: var(--text-main);
            line-height: 1.8;
            background-color: var(--white);
        }

        ul {
            list-style: none;
        }

        a {
            text-decoration: none;
            color: inherit;
        }

        img {
            max-width: 100%;
            display: block;
            border-radius: 8px;
        }

        /* 导航栏样式 */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: rgba(255, 255, 255, 0.98);
            box-shadow: var(--shadow-sm);
            z-index: 999;
            padding: 15px 0;
        }

        .nav-container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--primary-color);
            letter-spacing: 0.5px;
        }

        .nav-menu {
            display: flex;
            gap: 35px;
        }

        .nav-item {
            font-weight: 500;
            color: var(--text-main);
            transition: var(--transition);
            position: relative;
        }

        .nav-item:hover {
            color: var(--primary-color);
        }

        .nav-item::after {
            content: "";
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary-color);
            transition: var(--transition);
        }

        .nav-item:hover::after {
            width: 100%;
        }

        /* 首屏Banner */
        .hero-banner {
            height: 550px;
            background: linear-gradient(135deg, rgba(0, 102, 179, 0.9), rgba(0, 153, 204, 0.85)), url(https://images.unsplash.com/photo-1589394815804-964ed0be2eb0?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80);
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            color: var(--white);
            padding: 0 20px;
        }

        .hero-content h1 {
            font-size: 3.5rem;
            font-weight: 800;
            margin-bottom: 15px;
            letter-spacing: 2px;
        }

        .hero-content .sub-title {
            font-size: 1.5rem;
            opacity: 0.95;
            margin-bottom: 30px;
            letter-spacing: 6px;
        }

        .hero-content .slogan {
            font-size: 1.2rem;
            opacity: 0.9;
            margin-bottom: 40px;
        }

        .cta-btn {
            display: inline-block;
            background: var(--white);
            color: var(--primary-color);
            padding: 12px 40px;
            border-radius: 50px;
            font-weight: 600;
            transition: var(--transition);
            box-shadow: var(--shadow-md);
        }

        .cta-btn:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-lg);
            background: var(--deep-color);
            color: var(--white);
        }

        /* 通用板块标题 */
        .section-title-wrap {
            text-align: center;
            margin-bottom: 60px;
        }

        .section-title {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 10px;
        }

        .section-title-en {
            font-size: 1rem;
            color: var(--text-light);
            text-transform: uppercase;
            letter-spacing: 3px;
            margin-bottom: 15px;
        }

        .title-divider {
            width: 60px;
            height: 3px;
            background: linear-gradient(90deg, var(--secondary-color), var(--primary-color));
            margin: 0 auto;
            border-radius: 3px;
        }

        /* 公司业务概述板块 */
        .overview-section {
            padding: 100px 20px;
            max-width: 1400px;
            margin: 0 auto;
        }

        .overview-wrap {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 50px;
           /* align-items: center; */
        }

        .overview-text h2 {
            font-size: 1.8rem;
            color: var(--primary-color);
            margin-bottom: 25px;
            font-weight: 600;
        }

        .overview-text p {
            font-size: 1.05rem;
            color: var(--text-secondary);
            margin-bottom: 20px;
            text-align: justify;
        }

        .overview-img img {
            width: 100%;
            height: auto;
            box-shadow: var(--shadow-lg);
            border-radius: 12px;
        }

        /* 核心业务板块 */
        .business-section {
            padding: 100px 20px;
            background-color: var(--bg-light);
        }

        .business-container {
            max-width: 1400px;
            margin: 0 auto;
        }

        .business-grid {
			display: flex;
			flex-wrap: wrap;
			justify-content: space-between;
        }

        .business-card {
			width:calc(50% - 20px) ;
            background: var(--white);
            border-radius: 12px;
            overflow: hidden;
            box-shadow: var(--shadow-md);
            transition: var(--transition);
			margin-bottom: 20px;
        }

        .business-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-lg);
        }

        .card-img {
            width: 100%;
            height: 260px;
            overflow: hidden;
        }

        .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
            border-radius: 0;
        }

        .business-card:hover .card-img img {
            transform: scale(1.08);
        }

        .card-content {
            padding: 30px;
        }

        .card-content h3 {
            font-size: 1.4rem;
            font-weight: 600;
            color: var(--primary-color);
            margin-bottom: 15px;
        }

        .card-content p {
            color: var(--text-secondary);
            line-height: 1.8;
        }

        /* 核心优势板块 */
        .advantage-section {
            padding: 100px 20px;
            max-width: 1400px;
            margin: 0 auto;
        }

        .advantage-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
            gap: 30px;
			display: flex;
			justify-content: space-between;
			flex-wrap: wrap;
        }

        .advantage-card {
            background: var(--white);
            border: 1px solid #f0f0f0;
            border-radius: 12px;
            padding: 40px 30px;
            transition: var(--transition);
			width: calc(50% - 20px);
        }

        .advantage-card:hover {
            border-color: var(--secondary-color);
            box-shadow: var(--shadow-lg);
            transform: translateY(-5px);
        }

        .advantage-icon {
            width: 70px;
            height: 70px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--white);
            font-size: 1.8rem;
            margin-bottom: 25px;
        }

        .advantage-card h3 {
            font-size: 1.4rem;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 15px;
        }

        .advantage-card p {
            color: var(--text-secondary);
            line-height: 1.8;
        }

        /* 联系CTA板块 */
        .contact-cta-section {
            background: linear-gradient(135deg, var(--primary-color), var(--deep-color));
            padding: 70px 20px;
            color: var(--white);
            text-align: center;
        }

        .cta-container {
            max-width: 1200px;
            margin: 0 auto;
        }

        .cta-container h2 {
            font-size: 2rem;
            margin-bottom: 15px;
            font-weight: 700;
        }

        .cta-container p {
            font-size: 1.1rem;
            opacity: 0.9;
            margin-bottom: 40px;
        }

        .contact-info-wrap {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 40px;
            font-size: 1.1rem;
        }

        .contact-item {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .contact-item span {
            font-weight: 600;
        }

        /* 页脚 */
        footer {
            background: #1a1a1a;
            color: #cccccc;
            padding: 30px 20px;
            text-align: center;
        }

        footer p {
            font-size: 0.95rem;
        }

        /* 响应式适配 */
        @media (max-width: 1200px) {
            .overview-wrap {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .business-grid {
                grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
            }

            .hero-banner {
                height: 450px;
            }

                font-size: 2.2rem;
            }

            .hero-content .sub-title {
                font-size: 1.1rem;
                letter-spacing: 3px;
            }

            .section-title {
                font-size: 1.8rem;
            }

            .business-grid {
                grid-template-columns: 1fr;
            }

            .advantage-grid {
                grid-template-columns: 1fr;
            }

            .contact-info-wrap {
                flex-direction: column;
                align-items: center;
                gap: 20px;
            }

            .overview-section, .business-section, .advantage-section {
                padding: 60px 20px;
            }
        }