* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        :root {
            --primary-blue: #1A4B7A;
            --deep-blue: #0F2F4F;
            --light-blue: #2D6BA3;
            --amber: #E8A838;
            --light-amber: #F5C563;
            --bg-white: #FFFFFF;
            --bg-light: #F8FAFC;
            --bg-gray: #F0F4F8;
            --text-dark: #1F2937;
            --text-gray: #6B7280;
            --text-light: #9CA3AF;
            --border-color: #E5E7EB;
            --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
            --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
            --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            color: var(--text-dark);
            background: var(--bg-white);
            line-height: 1.6;
            overflow-x: hidden;
        }

        /* 导航栏 */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: var(--bg-white);
            transition: box-shadow 0.3s ease;
        }

        .navbar.scrolled {
            box-shadow: var(--shadow-md);
        }

        .navbar-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            height: 72px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 12px;
            text-decoration: none;
            color: var(--text-dark);
        }

        .logo-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary-blue), var(--light-blue));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .logo-icon svg {
            width: 24px;
            height: 24px;
            fill: white;
        }

        .logo-text {
            font-size: 18px;
            font-weight: 600;
            letter-spacing: -0.5px;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 36px;
            list-style: none;
        }

        .nav-menu a {
            text-decoration: none;
            color: var(--text-gray);
            font-size: 15px;
            font-weight: 500;
            transition: color 0.2s ease;
            position: relative;
        }

        .nav-menu a:hover {
            color: var(--primary-blue);
        }

        .nav-menu a::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary-blue);
            transition: width 0.3s ease;
        }

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

        .nav-cta {
            background: linear-gradient(135deg, var(--primary-blue), var(--light-blue));
            color: white !important;
            padding: 10px 20px;
            border-radius: 8px;
            transition: all 0.3s ease !important;
        }

        .nav-cta:hover {
            background: linear-gradient(135deg, var(--deep-blue), var(--primary-blue));
            transform: translateY(-1px);
        }

        .nav-cta::after {
            display: none !important;
        }

        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
        }

        .mobile-menu-btn span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--text-dark);
            margin: 5px 0;
            transition: all 0.3s ease;
        }

        /* Hero 区域 */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            padding: 120px 24px 80px;
            background: linear-gradient(180deg, var(--bg-light) 0%, var(--bg-white) 100%);
            position: relative;
            overflow: hidden;
        }

        /* 长江波纹装饰 */
        .hero::before {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 200px;
            background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1200 120'%3E%3Cpath d='M0,60 C200,40 400,80 600,60 C800,40 1000,80 1200,60 L1200,120 L0,120 Z' fill='%231A4B7A' opacity='0.05'/%3E%3C/svg%3E") repeat-x;
            opacity: 0.6;
        }

        .hero::after {
            content: '';
            position: absolute;
            top: -30%;
            right: -15%;
            width: 700px;
            height: 700px;
            background: radial-gradient(circle, rgba(232, 168, 56, 0.08) 0%, transparent 70%);
            border-radius: 50%;
        }

        .hero-container {
            max-width: 1200px;
            margin: 0 auto;
            width: 100%;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 80px;
            align-items: center;
            position: relative;
            z-index: 1;
        }

        .hero-content {
            animation: fadeInUp 0.8s ease-out;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(26, 75, 122, 0.1);
            color: var(--primary-blue);
            padding: 8px 16px;
            border-radius: 20px;
            font-size: 14px;
            font-weight: 500;
            margin-bottom: 24px;
        }

        .hero-badge svg {
            width: 16px;
            height: 16px;
        }

        .hero h1 {
            font-size: 52px;
            font-weight: 700;
            line-height: 1.2;
            margin-bottom: 16px;
            letter-spacing: -1.5px;
            color: var(--text-dark);
        }

        .hero h1 span {
            background: linear-gradient(135deg, var(--primary-blue), var(--amber));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-slogan {
            font-size: 20px;
            color: var(--text-gray);
            margin-bottom: 32px;
            line-height: 1.8;
        }

        .hero-buttons {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 28px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s ease;
            cursor: pointer;
            border: none;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary-blue), var(--light-blue));
            color: white;
            box-shadow: 0 4px 14px rgba(26, 75, 122, 0.4);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(26, 75, 122, 0.5);
        }

        .btn-secondary {
            background: var(--bg-white);
            color: var(--text-dark);
            border: 1px solid var(--border-color);
        }

        .btn-secondary:hover {
            border-color: var(--primary-blue);
            color: var(--primary-blue);
            transform: translateY(-2px);
        }

        .hero-visual {
            position: relative;
            animation: fadeInUp 0.8s ease-out 0.2s backwards;
        }

        .hero-graphic {
            width: 100%;
            height: 500px;
            background: linear-gradient(135deg, var(--bg-white) 0%, var(--bg-light) 100%);
            border-radius: 24px;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-xl);
        }

        .hero-graphic-inner {
            position: absolute;
            inset: 0;
            display: flex;
            flex-direction: column;
            padding: 40px;
        }

        .graphic-line {
            height: 4px;
            background: var(--bg-gray);
            border-radius: 2px;
            margin-bottom: 20px;
        }

        .graphic-line:nth-child(1) {
            width: 60%;
        }

        .graphic-line:nth-child(2) {
            width: 40%;
        }

        .graphic-blocks {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            margin-top: auto;
        }

        .graphic-block {
            height: 120px;
            background: var(--bg-gray);
            border-radius: 12px;
            position: relative;
        }

        .graphic-block::after {
            content: '';
            position: absolute;
            inset: 0;
            border-radius: 12px;
            border: 2px solid var(--border-color);
        }

        .graphic-block:nth-child(1) {
            background: linear-gradient(135deg, rgba(26, 75, 122, 0.1), rgba(45, 107, 163, 0.1));
        }

        .graphic-block:nth-child(2) {
            background: linear-gradient(135deg, rgba(232, 168, 56, 0.15), rgba(245, 197, 99, 0.15));
        }

        .graphic-block:nth-child(3) {
            background: linear-gradient(135deg, rgba(26, 75, 122, 0.2), rgba(45, 107, 163, 0.2));
        }

        .floating-card {
            position: absolute;
            background: var(--bg-white);
            padding: 16px 20px;
            border-radius: 12px;
            box-shadow: var(--shadow-lg);
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .floating-card.card-1 {
            top: 30px;
            right: -20px;
            animation: float 3s ease-in-out infinite;
        }

        .floating-card.card-2 {
            bottom: 80px;
            left: -20px;
            animation: float 3s ease-in-out infinite 1.5s;
        }

        .card-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary-blue), var(--amber));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .card-icon svg {
            width: 20px;
            height: 20px;
            fill: white;
        }

        .card-text {
            font-size: 13px;
            color: var(--text-gray);
        }

        .card-text strong {
            display: block;
            font-size: 15px;
            color: var(--text-dark);
        }

        /* 通用区块样式 */
        .section {
            padding: 100px 24px;
        }

        .section-header {
            text-align: center;
            max-width: 600px;
            margin: 0 auto 60px;
        }

        .section-label {
            display: inline-block;
            color: var(--primary-blue);
            font-size: 14px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 12px;
        }

        .section-title {
            font-size: 40px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 16px;
            letter-spacing: -1px;
        }

        .section-desc {
            font-size: 17px;
            color: var(--text-gray);
            line-height: 1.7;
        }

        /* 关于我们 */
        .about {
            background: var(--bg-white);
        }

        .about-grid {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 80px;
            align-items: center;
        }

        .about-content {
            animation: fadeInLeft 0.8s ease-out;
        }

        .about-content h2 {
            font-size: 36px;
            font-weight: 700;
            margin-bottom: 24px;
            letter-spacing: -0.5px;
        }

        .about-content h2 span {
            color: var(--primary-blue);
        }

        .about-content p {
            font-size: 16px;
            color: var(--text-gray);
            line-height: 1.8;
            margin-bottom: 32px;
        }

        .about-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        .about-feature {
            display: flex;
            align-items: flex-start;
            gap: 12px;
        }

        .about-feature-icon {
            width: 24px;
            height: 24px;
            min-width: 24px;
            background: rgba(26, 75, 122, 0.1);
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .about-feature-icon svg {
            width: 14px;
            height: 14px;
            fill: var(--primary-blue);
        }

        .about-feature span {
            font-size: 14px;
            color: var(--text-dark);
            font-weight: 500;
        }

        .about-stats {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
            animation: fadeInRight 0.8s ease-out;
        }

        .stat-card {
            background: var(--bg-light);
            padding: 32px;
            border-radius: 16px;
            text-align: center;
            transition: all 0.3s ease;
        }

        .stat-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }

        .stat-number {
            font-size: 48px;
            font-weight: 700;
            background: linear-gradient(135deg, var(--primary-blue), var(--amber));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 8px;
        }

        .stat-label {
            font-size: 14px;
            color: var(--text-gray);
        }

        /* 业务范围 */
        .services {
            background: var(--bg-light);
        }

        .services-grid {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .service-card {
            background: var(--bg-white);
            padding: 36px;
            border-radius: 16px;
            transition: all 0.3s ease;
            cursor: pointer;
            border: 1px solid transparent;
        }

        .service-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-xl);
            border-color: rgba(26, 75, 122, 0.2);
        }

        .service-icon {
            width: 56px;
            height: 56px;
            background: linear-gradient(135deg, rgba(26, 75, 122, 0.1), rgba(45, 107, 163, 0.1));
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            transition: all 0.3s ease;
        }

        .service-card:hover .service-icon {
            background: linear-gradient(135deg, var(--primary-blue), var(--light-blue));
        }

        .service-icon svg {
            width: 28px;
            height: 28px;
            fill: var(--primary-blue);
            transition: fill 0.3s ease;
        }

        .service-card:hover .service-icon svg {
            fill: white;
        }

        .service-card h3 {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 12px;
            color: var(--text-dark);
        }

        .service-card p {
            font-size: 15px;
            color: var(--text-gray);
            line-height: 1.7;
        }

        /* 核心优势 */
        .advantages {
            background: var(--bg-white);
        }

        .advantages-grid {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
        }

        .advantage-card {
            text-align: center;
            padding: 40px 24px;
            border-radius: 16px;
            background: var(--bg-light);
            transition: all 0.3s ease;
        }

        .advantage-card:hover {
            background: var(--bg-white);
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
        }

        .advantage-icon {
            width: 72px;
            height: 72px;
            background: linear-gradient(135deg, var(--primary-blue), var(--amber));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 24px;
        }

        .advantage-icon svg {
            width: 32px;
            height: 32px;
            fill: white;
        }

        .advantage-card h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 12px;
            color: var(--text-dark);
        }

        .advantage-card p {
            font-size: 14px;
            color: var(--text-gray);
            line-height: 1.7;
        }

        /* 联系我们 */
        .contact {
            background: var(--bg-light);
        }

        .contact-container {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
        }

        .contact-info {
            animation: fadeInLeft 0.8s ease-out;
        }

        .contact-info h2 {
            font-size: 36px;
            font-weight: 700;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }

        .contact-info>p {
            font-size: 16px;
            color: var(--text-gray);
            margin-bottom: 40px;
            line-height: 1.7;
        }

        .contact-details {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .contact-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
        }

        .contact-icon {
            width: 48px;
            height: 48px;
            min-width: 48px;
            background: linear-gradient(135deg, var(--primary-blue), var(--light-blue));
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .contact-icon svg {
            width: 22px;
            height: 22px;
            fill: white;
        }

        .contact-item-content h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 4px;
        }

        .contact-item-content p {
            font-size: 14px;
            color: var(--text-gray);
        }

        .contact-form {
            background: var(--bg-white);
            padding: 40px;
            border-radius: 20px;
            box-shadow: var(--shadow-lg);
            animation: fadeInRight 0.8s ease-out;
        }

        .contact-form h3 {
            font-size: 22px;
            font-weight: 600;
            margin-bottom: 24px;
            color: var(--text-dark);
        }

        .form-group {
            margin-bottom: 20px;
        }

        .form-group label {
            display: block;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-dark);
            margin-bottom: 8px;
        }

        .form-group input,
        .form-group textarea {
            width: 100%;
            padding: 14px 16px;
            border: 1px solid var(--border-color);
            border-radius: 10px;
            font-size: 15px;
            font-family: inherit;
            transition: all 0.3s ease;
            background: var(--bg-light);
        }

        .form-group input:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: var(--primary-blue);
            background: var(--bg-white);
            box-shadow: 0 0 0 3px rgba(26, 75, 122, 0.1);
        }

        .form-group textarea {
            min-height: 120px;
            resize: vertical;
        }

        .form-submit {
            width: 100%;
            padding: 16px;
            background: linear-gradient(135deg, var(--primary-blue), var(--light-blue));
            color: white;
            border: none;
            border-radius: 10px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .form-submit:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 14px rgba(26, 75, 122, 0.4);
        }

        /* 页脚 */
        .footer {
            background: var(--deep-blue);
            color: white;
            padding: 48px 24px;
        }

        .footer-container {
            max-width: 1200px;
            margin: 0 auto;
            text-align: center;
        }

        .footer-logo {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
            margin-bottom: 20px;
        }

        .footer-logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary-blue), var(--amber));
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .footer-logo-icon svg {
            width: 20px;
            height: 20px;
            fill: white;
        }

        .footer-logo span {
            font-size: 16px;
            font-weight: 600;
        }

        .footer-info {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 8px;
        }

        .footer-copyright {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
            margin-top: 16px;
            padding-top: 16px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            a{
                text-decoration: none;
                color: rgba(255, 255, 255, 0.5);
            }
        }

        /* 动画 */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }

            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @keyframes fadeInLeft {
            from {
                opacity: 0;
                transform: translateX(-30px);
            }

            to {
                opacity: 1;
                transform: translateX(0);
            }
        }

        @keyframes fadeInRight {
            from {
                opacity: 0;
                transform: translateX(30px);
            }

            to {
                opacity: 1;
                transform: translateX(0);
            }
        }

        @keyframes float {

            0%,
            100% {
                transform: translateY(0);
            }

            50% {
                transform: translateY(-10px);
            }
        }

        /* 滚动动画 */
        .animate-on-scroll {
            opacity: 0;
            transform: translateY(30px);
            transition: all 0.6s ease-out;
        }

        .animate-on-scroll.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* 响应式设计 */
        @media (max-width: 1024px) {
            .hero-container {
                grid-template-columns: 1fr;
                gap: 60px;
                text-align: center;
            }

            .hero h1 {
                font-size: 42px;
            }

            .hero-buttons {
                justify-content: center;
            }

            .hero-visual {
                max-width: 500px;
                margin: 0 auto;
            }

            .hero-graphic {
                height: 400px;
            }

            .about-grid {
                grid-template-columns: 1fr;
                gap: 60px;
            }

            .services-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .advantages-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .contact-container {
                grid-template-columns: 1fr;
                gap: 40px;
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                position: absolute;
                top: 72px;
                left: 0;
                right: 0;
                background: var(--bg-white);
                flex-direction: column;
                padding: 24px;
                gap: 20px;
                box-shadow: var(--shadow-lg);
            }

            .nav-menu.active {
                display: flex;
            }

            .mobile-menu-btn {
                display: block;
            }

            .mobile-menu-btn.active span:nth-child(1) {
                transform: rotate(45deg) translate(5px, 5px);
            }

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

            .mobile-menu-btn.active span:nth-child(3) {
                transform: rotate(-45deg) translate(5px, -5px);
            }

            .hero {
                padding: 100px 24px 60px;
            }

            .hero h1 {
                font-size: 32px;
            }

            .hero-slogan {
                font-size: 17px;
            }

            .hero-buttons {
                flex-direction: column;
                align-items: center;
            }

            .btn {
                width: 100%;
                justify-content: center;
                max-width: 280px;
            }

            .hero-graphic {
                height: 300px;
            }

            .floating-card {
                display: none;
            }

            .section {
                padding: 60px 24px;
            }

            .section-title {
                font-size: 30px;
            }

            .about-content h2,
            .contact-info h2 {
                font-size: 28px;
            }

            .about-features {
                grid-template-columns: 1fr;
            }

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

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

            .stat-card {
                padding: 24px;
            }

            .stat-number {
                font-size: 36px;
            }

            .contact-form {
                padding: 28px;
            }
        }