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

        body {
            font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            background-color: #ffffff;
            color: #1A2C3E;
            line-height: 1.5;
            scroll-behavior: smooth;
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #2C6BFF;
            color: white;
            font-weight: 600;
            padding: 12px 28px;
            border-radius: 40px;
            text-decoration: none;
            transition: all 0.25s ease;
            box-shadow: 0 4px 12px rgba(44, 107, 255, 0.2);
            border: none;
            cursor: pointer;
            font-size: 16px;
        }
        .btn-primary:hover {
            background: #1a56e0;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(44, 107, 255, 0.3);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            border: 1.5px solid #D0DAE6;
            color: #2C3E50;
            font-weight: 500;
            padding: 12px 28px;
            border-radius: 40px;
            text-decoration: none;
            transition: all 0.2s;
        }
        .btn-outline:hover {
            border-color: #2C6BFF;
            color: #2C6BFF;
            background: rgba(44, 107, 255, 0.03);
        }

        .navbar {
            position: sticky;
            top: 0;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            z-index: 100;
            border-bottom: 1px solid rgba(0,0,0,0.05);
            padding: 16px 0;
        }
        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 26px;
            font-weight: 800;
            background: linear-gradient(135deg, #1F2A3E 0%, #2C6BFF 100%);
            background-clip: text;
            -webkit-background-clip: text;
            color: transparent;
            letter-spacing: -0.5px;
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            /*background: linear-gradient(145deg, #0577f9, #1750d4);*/
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: 800;
            font-size: 20px;
            box-shadow: 0 6px 12px rgba(5,119,249,0.2);
        }
        .nav-links {
            display: flex;
            gap: 32px;
            align-items: center;
        }
        .dropdown {
            position: relative;
        }
        .dropdown > a {
            text-decoration: none;
            color: #2C3E50;
            font-weight: 500;
            transition: color 0.2s;
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .dropdown > a:hover {
            color: #2C6BFF;
        }
        .dropdown-arrow {
            font-size: 12px;
            transition: transform 0.25s ease;
            display: inline-block;
        }
        .dropdown:hover .dropdown-arrow {
            transform: rotate(180deg);
        }
        .dropdown::after {
            content: '';
            position: absolute;
            bottom: -12px;
            left: 0;
            width: 100%;
            height: 12px;
            background: transparent;
            pointer-events: auto;
        }

        /* 已修改：下拉菜单居中显示 */
        .dropdown-content {
            position: absolute;
            top: 100%;
            left: 50%;
            transform: translateX(-50%) translateY(8px);
            background: white;
            border-radius: 20px;
            box-shadow: 0 20px 35px -10px rgba(0,0,0,0.12), 0 0 0 1px rgba(0,0,0,0.02);
            width: 780px;
            max-width: calc(100vw - 40px);
            padding: 28px 24px;
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.2s ease, visibility 0.2s, transform 0.2s;
            z-index: 200;
            pointer-events: none;
        }
        .dropdown:hover .dropdown-content {
            opacity: 1;
            visibility: visible;
            transform: translateX(-50%) translateY(0);
            pointer-events: auto;
        }

        /* 已修改：解决方案也居中，取消右对齐 */
        .dropdown-content.solution {
            left: 50%;
            right: auto;
            width: 840px;
            max-width: calc(100vw - 40px);
        }

        .menu-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px 28px;
        }
        .menu-item a {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            text-decoration: none;
            transition: 0.2s;
        }
        .menu-icon {
            font-size: 20px;
            width: 28px;
            flex-shrink: 0;
            margin-top: 2px;
        }
        .menu-text {
            flex: 1;
        }
        .menu-text h4 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 6px;
            color: #1A2C3E;
            transition: color 0.2s;
        }
        .menu-text p {
            font-size: 13px;
            color: #6F7D98;
            line-height: 1.4;
            margin: 0;
        }
        .menu-item a:hover h4 {
            color: #2C6BFF;
        }
        .menu-divider {
            height: 1px;
            background: #EFF2F8;
            margin: 20px 0 16px;
        }
        .menu-footer {
            margin-top: 8px;
            font-size: 13px;
        }
        .menu-footer a {
            color: #2C6BFF;
            text-decoration: none;
            font-weight: 500;
        }
        .nav-links > a:not(.btn-outline):not(.btn-primary) {
            text-decoration: none;
            color: #2C3E50;
            font-weight: 500;
            transition: color 0.2s;
        }
        .nav-links > a:not(.btn-outline):not(.btn-primary):hover {
            color: #2C6BFF;
        }
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            font-size: 28px;
            cursor: pointer;
            color: #1f2f3d;
        }

        @media (max-width: 1024px) {
            .dropdown-content {
                width: 720px;
            }
            .dropdown-content.solution {
                width: 760px;
            }
        }
        @media (max-width: 900px) {
            .dropdown-content.solution {
                width: 700px;
            }
        }
        @media (max-width: 800px) {
            .dropdown-content {
                width: 640px;
            }
            .dropdown-content.solution {
                width: 640px;
            }
        }
        @media (max-width: 768px) {
            .nav-links {
                display: none;
                width: 100%;
                flex-direction: column;
                gap: 20px;
                padding: 24px 0 16px;
            }
            .nav-links.show {
                display: flex;
            }
            .mobile-menu-btn {
                display: block;
            }
            .container {
                padding: 0 20px;
            }
            .btn-primary, .btn-outline {
                padding: 10px 20px;
            }
            .dropdown {
                width: 100%;
            }
            .dropdown::after {
                display: none;
            }
            .dropdown-content {
                position: static;
                width: 100%;
                box-shadow: none;
                padding: 12px 0 0 16px;
                opacity: 1;
                visibility: hidden;
                transform: none;
                display: none;
                background: transparent;
                transition: none;
                top: auto;
                left: auto;
                right: auto;
                margin-top: 0;
                max-width: none;
            }
            .dropdown-content.open {
                display: block;
                visibility: visible;
                opacity: 1;
            }
            .dropdown:hover .dropdown-content {
                opacity: 1;
                visibility: visible;
                transform: none;
                pointer-events: auto;
                display: none;
            }
            .dropdown-content .menu-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .dropdown-content.solution {
                width: 100%;
                left: 0;
                right: auto;
            }
            .menu-footer {
                margin-top: 12px;
            }
            .menu-item a {
                gap: 8px;
            }
            .dropdown-arrow.rotated {
                transform: rotate(180deg);
            }
        }

        .hero {
            padding: 80px 0 64px;
            background: linear-gradient(135deg, #F8FAFF 0%, #FFFFFF 100%);
        }
        .hero-grid {
            display: flex;
            align-items: center;
            gap: 48px;
            flex-wrap: wrap;
        }
        .hero-content {
            flex: 1;
        }
        .hero-badge {
            background: #EFF4FF;
            color: #2C6BFF;
            padding: 6px 14px;
            border-radius: 40px;
            font-size: 14px;
            font-weight: 500;
            display: inline-block;
            margin-bottom: 24px;
        }
        .hero-content h1 {
            font-size: 52px;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.02em;
            background: linear-gradient(to right, #1A2C3E, #2C6BFF);
            background-clip: text;
            -webkit-background-clip: text;
            color: transparent;
            margin-bottom: 24px;
        }
        .hero-content p {
            font-size: 18px;
            color: #5A6E8C;
            max-width: 540px;
            margin-bottom: 32px;
        }
        .hero-buttons {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .hero-image {
            flex: 1;
            text-align: center;
        }
        .hero-image img {
            max-width: 100%;
            border-radius: 32px;
            box-shadow: 0 25px 45px -12px rgba(0,0,0,0.15);
        }
        @media (max-width: 900px) {
            .hero-grid {
                flex-direction: column;
                text-align: center;
            }
            .hero-content h1 {
                font-size: 40px;
            }
            .hero-content p {
                margin-left: auto;
                margin-right: auto;
            }
            .hero-buttons {
                justify-content: center;
            }
        }

        .stats-section {
            background: #FFFFFF;
            padding: 60px 0;
            border-bottom: 1px solid #EDF2F7;
        }
        .stats-grid {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 32px;
            text-align: center;
        }
        .stat-item h3 {
            font-size: 42px;
            font-weight: 800;
            color: #2C6BFF;
            margin-bottom: 8px;
        }
        .stat-item p {
            color: #5F7D9C;
            font-weight: 500;
        }

        .features {
            padding: 80px 0;
            background: #FCFDFF;
        }
        .section-title {
            text-align: center;
            padding-top: 56px;
            margin-bottom: 56px;
        }
        .section-title h2 {
            font-size: 36px;
            font-weight: 700;
            letter-spacing: -0.01em;
            margin-bottom: 16px;
        }
        .section-title p {
            color: #5A6E8C;
            max-width: 600px;
            margin: 0 auto;
            font-size: 18px;
        }
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 32px;
        }
        .feature-card {
            background: white;
            border-radius: 28px;
            padding: 32px 28px;
            transition: all 0.3s;
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.03), 0 1px 2px rgba(0,0,0,0.03);
            border: 1px solid rgba(0,0,0,0.04);
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: 0 25px 35px -12px rgba(44,107,255,0.12);
            border-color: rgba(44,107,255,0.2);
        }
        .feature-icon {
            width: 56px;
            height: 56px;
            background: #EFF4FF;
            border-radius: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 24px;
            color: #2C6BFF;
            font-size: 28px;
        }
        .feature-card h3 {
            font-size: 22px;
            margin-bottom: 12px;
            font-weight: 700;
        }
        .feature-card p {
            color: #5F7D9C;
            line-height: 1.5;
        }

        .showcase {
            background: linear-gradient(to bottom, #FFFFFF, #F9FBFE);
            padding: 80px 0;
        }
        .showcase-inner {
            display: flex;
            gap: 56px;
            align-items: center;
            flex-wrap: wrap;
        }
        .showcase-text {
            flex: 1;
        }
        .showcase-text h3 {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 20px;
        }
        .showcase-text p {
            color: #5A6E8C;
            font-size: 18px;
            margin-bottom: 24px;
        }
        .feature-list {
            list-style: none;
            margin-top: 20px;
        }
        .feature-list li {
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .feature-list li span:first-child {
            background: #2C6BFF10;
            border-radius: 40px;
            padding: 6px;
            color: #2C6BFF;
        }
        .showcase-image {
            flex: 1;
            text-align: center;
        }
        .showcase-image img {
            max-width: 100%;
            border-radius: 32px;
            box-shadow: 0 20px 35px -12px rgba(0,0,0,0.1);
        }

        .cta {
            background: #1A2C3E;
            margin: 40px 0 60px;
            border-radius: 40px;
            padding: 60px 48px;
            text-align: center;
            color: white;
        }
        .cta h2 {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .cta p {
            font-size: 18px;
            opacity: 0.85;
            max-width: 580px;
            margin: 0 auto 32px;
        }
        .cta .btn-primary {
            background: white;
            color: #1A2C3E;
            box-shadow: none;
        }
        .cta .btn-primary:hover {
            background: #f0f4ff;
            transform: translateY(-2px);
        }

        .footer {
            background: #F8FAFE;
            padding: 56px 0 32px;
            border-top: 1px solid #E9EDF2;
        }
        .footer-grid {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 40px;
            margin-bottom: 48px;
        }
        .footer-col {
            flex: 1;
            min-width: 160px;
        }
        .footer-col h4 {
            font-weight: 700;
            margin-bottom: 20px;
            color: #1A2C3E;
        }
        .footer-col a {
            display: block;
            color: #5A6E8C;
            text-decoration: none;
            margin-bottom: 12px;
            transition: color 0.2s;
        }
        .footer-col a:hover {
            color: #2C6BFF;
        }
        .copyright {
            text-align: center;
            padding-top: 32px;
            border-top: 1px solid #E2E8F0;
            color: #7D8EAA;
            font-size: 14px;
        }
        @media (max-width: 768px) {
            .cta {
                padding: 40px 24px;
            }
            .footer-grid {
                flex-direction: column;
            }
        }