* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Microsoft YaHei', Arial, sans-serif;
        }
        :root {
            --primary: #1b54b7;
            --primary-dark: #164392;
            --accent: #4361ee;
            --text-gray: #7f8c8d;
        }
        body {
            background-color: #f1f5fd!important;
            color: #333;
            line-height: 1.6;
        }
        
        .container {
            max-width: 1320px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        /* 头部样式 */
        header {
            background: linear-gradient(135deg, #133B80 0%, #133B80 100%);
            color: white;
            padding: 15px 0;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            letter-spacing: 1px;
            box-shadow: 0 2px 15px rgba(0, 0, 0, 0.2);
        }
        
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            position: relative;
        }
        
        .logo {
            display: flex;
            align-items: center;
        }
        
        .logo h1 {
            font-size: 28px;
            margin-left: 10px;
        }
        
        .logo-icon {
            font-size: 28px;
            color: #4cc9f0;
        }
        
        nav ul {
            display: flex;
            list-style: none;
        }
        
        nav ul li {
            margin-left: 10px;
            font-size: 1.1rem;
        }
        nav > ul > li {
            height: 60px;
            display: flex;
            align-items: center;
        }

        nav > ul > li > a  {
            color: white;
            text-decoration: none;
            /* font-weight: bold; */
            transition: color 0.3s;
            padding: 10px 15px;
            border-radius: 4px;
            transition: .3s;
            
        }
        
        nav > ul > li > a:hover,
        nav > ul > li.on > a {
            color: #4cc9f0;
            background: rgba(255, 255, 255, 0.1);
            color: #1b54b7;
            background-color: rgba(255, 255, 255, 0.9);
        }
        nav .hard img {
            height: 120px;
            margin: 0 auto;
            display: block;
        }
         
        nav .dropdown-menu li:hover {
            opacity: 0.7;
            transition: .3s;
        }
         /* 下拉菜单 */
        .dropdown-menu {
            position: absolute;
            top: 60px;
            left: 50%;
            background: white;
            margin-left: -650px;
            max-width: 1300px;
            display: none;
            flex-wrap: wrap;
            padding: 20px;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
            border-radius: 0 0 8px 8px;
            z-index: 10000;
            font-size: 1rem;
        }
        
        nav li:hover .dropdown-menu {
            display: flex;
            width: 100%;
            justify-content: space-between;
        }
        
        .dropdown-menu .col {
            box-sizing: border-box;
            width: calc(100% / 6);
            margin: 0 0 20px;
        }
        
        .dropdown-item {
            /* display: flex; */
            align-items: center;
            text-decoration: none;
            color: #333;
            border-radius: 6px;
            transition: all 0.3s ease;
        }
        
        .dropdown-item:hover {
            background-color: #f5f9ff;
        }

        .dropdown-item .rounded {
            width: 100%;
            display: block;
        }

        .dropdown-item .rounded img {
            max-width: 100%;
        }
        .dropdown-item span {
            display: block;
            text-align: center;
            font-size: 1rem;
        }

        /* 移动端样式 */
        .mobile-toggle {
            display: none;
            color: white;
            font-size: 1.5rem;
            background: none;
            border: none;
            cursor: pointer;
        }

        /* 页脚样式 */
        footer {
            background: #1b54b7 ;
            color: white;
            padding: 60px 0 30px;
            position: relative;
        }
        footer:before {
            position: absolute;
            top: 0;
            bottom: 0;
            right: 0;
            left: 0;
            content: '';
            background: rgba(0, 0, 0, 0.3);
        }
        
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
            position: relative;
            z-index: 1;
        }
        
        .footer-section h3 {
            font-size: 1.3rem;
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 10px;
        }
        
        .footer-section h3::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 40px;
            height: 3px;
            background: #4cc9f0;
        }
        
        .footer-section p, .footer-section li {
            margin-bottom: 10px;
        }
        
        .footer-section ul {
            list-style: none;
        }
        
        .footer-section a {
            color: white;
            text-decoration: none;
            transition: color 0.3s;
        }
        
        .footer-section a:hover {
            color: #4cc9f0;
        }
        
        .footer-bottom {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }
        .footer-bottom .copyright {
            position: relative;
            z-index: 1;
        }
        .footer-bottom .copyright img {
            margin-right: 5px;
            vertical-align: middle;
        }
        .footer-bottom .copyright a {
            text-decoration: none;
        }

        /* 弹层 */
        .popup {
            position: fixed;
            top: 0;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 99999999;
            display: none;
            pointer-events: none;
        }
        .popupbox {
            position: fixed;
            top: 50%;
            left: 50%;
            transform: translate(-50%,-50%);
            width: 466px;
            height: auto;
            max-width:100%;
        }
        .popup-img {
            width: 100%;
            height: auto;
        }
        .popup-img-close {
            width: 40px;
            height: 40px;
            position: absolute;
            top: 115px;
            right: 30px;
            cursor: pointer;
            pointer-events: auto;		
        }


        /* 按钮填充效果 */
        .btn {
            margin: 0 auto 5rem;
            position: relative;
            padding: 1rem 2rem;
            font-size: 1.05rem;
            font-weight: 600;
            border: none;
            cursor: pointer;
            outline: none;
            overflow: hidden;
            min-width: 170px;
            text-align: center;
            width: 125px;
            display: block;
            padding: 12px 30px;
            text-decoration: none;
            border-radius: 80px;
            transition: all 0.3s;
            /* box-shadow: 0 4px 15px rgba(76, 201, 240, 0.3); */
        }

        .fill {
            background: transparent;
            color: #1b54b7;
            border: 2px solid #1b54b7;
            z-index: 1;
        }
        
        .fill:hover {
            color: #fff;
        }
        
        .fill::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: #1b54b7;
            transition: all 0.4s ease;
            z-index: -1;
        }
        
        .fill:hover::before {
            left: 0;
        }
        
        /* 按钮3D浮动效果 */
        .float {
            background: #1b54b7;
            color: white;
            box-shadow: 0 5px 0 #0D2A5B;
            transform: translateY(0);
        }
        
        .float:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 0 #0D2A5B;
        }
        
        .float:active {
            transform: translateY(0);
        }

        /* 返回顶部 */
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background: #1b54b7;
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
            transition: all 0.3s ease;
            opacity: 0;
            visibility: hidden;
            z-index: 1000;
        }
        
        .back-to-top.visible {
            opacity: 1;
            visibility: visible;
        }
        
        .back-to-top:hover {
            background: #2980b9;
            transform: translateY(-5px);
        }

        .main-title {
            margin-bottom: 100px;
            background-color: #133B80;
            background: url('../img/common/hero_img.png') no-repeat center center/cover;
            position: relative;
        }
        /* main-title */
        .main-title h2 {
            padding: 200px 0 110px;
            max-width: 1320px;
            margin: 0 auto;
            color: #fff;
            font-size: 2.8rem;
            text-align: center;
            position: relative;
            z-index: 1;
            /* text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5); */
            
        }
        .main-title::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(10, 36, 99, 0.8);
        }

        /* section-title */
        .section-title {
            text-align: center;
            margin-bottom: 50px;
        }
        
        .section-title h2 {
            font-size: 2.5rem;
            color: #1b54b7;
            margin-bottom: 1.2rem;
            position: relative;
            display: inline-block;
        }
        .section-title p {
            color: #333;
            margin: 0 auto;
            font-size: 1.05rem;
            text-align: left;
        }
        /* 响应式设计 */
        @media (max-width: 992px) {
            .header-content {
                align-items: center;
            }
            
            .mobile-toggle {
                display: block;
            }
            .logo img {
                width: 150px;
            }
            nav {
                position: absolute;
                top: 62px;
                left: 0;
                width: 100%;
                background: white;
                box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
                display: none;
            }
            
            nav.active {
                display: block;
            }
            
            nav ul {
                flex-direction: column;
            }
            
            nav ul li {
                margin: 0;
                width: 100%;
                border-bottom: 1px solid #eee;
            }

            .back-to-top {
                bottom: 20px;
                right: 20px;
                width: 45px;
                height: 45px;
            }
            
            nav > ul > li > a {
                color: #333;
                display: block;
                width: 100%;
                box-sizing: border-box;
                padding: 15px 20px;
                position: relative;
            }
            nav > ul > li > a:before {
                position: absolute;
                right: 15px;
                top: 26%;
                content: '>';
            }
            
            .dropdown-menu {
                position: static;
                width: 100%;
                box-shadow: none;
                display: none !important;
                padding: 10px;
            }
            
            .dropdown-menu.active {
                display: flex;
            }
            
            .dropdown-menu .col {
                flex: 0 0 100%;
            }

             #popup {
                display: none !important;
            }
            .btn {
                margin-bottom: 40px;
                width: 100px;
                font-size: 1rem;
            }
            footer {
                padding: 30px 0 20px;
            }
            footer h3 {
                text-align: center;
            }
            .footer-section h3::after {
                left: 50%;
                margin-left: -20px;
            }
            .footer-bottom {
                padding-top: 20px;
            }
            .footer-content {
                margin-bottom: 20px;
            }
            .footer-section:not(:nth-child(3)) {
                display: none;
            }
            .main-title {
                margin-bottom: 60px;
            }
            .main-title h2 {
                padding: 180px 0 100px;
                font-size: 1.8rem;
            }
            .section-title {
                margin-bottom: 20px;
            }
            .section-title h2 {
                margin-bottom: 0;
                font-size: 1.6rem;
            }
            .section-title p {
                font-size: 1.1rem;
                margin: 0 15px 20px;
            }
        }