* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: "Microsoft YaHei", sans-serif;
        }
        :root {
            --main-blue: #0057cc;
            --light-blue: #2488ff;
            --deep-blue: #003b88;
            --gray-bg: #f5f8fc;
            --text-gray: #666;
            --white: #fff;
        }
        a {
            text-decoration: none;
        }
        ul {
            list-style: none;
        }
        img {
            max-width: 100%;
            display: block;
        }
        .container {
            width: 1200px;
            margin: 0 auto;
            padding: 0 15px;
        }
        /* 顶部导航栏 */
        .top-bar {
            background-color: var(--deep-blue);
            color: var(--white);
            padding: 8px 0;
            font-size: 14px;
        }
        .top-bar .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .top-left span {
            margin-right: 20px;
        }
        .top-right a {
            color: var(--white);
            margin-left: 15px;
        }
        /* 导航菜单 */
        .header-nav {
            background: var(--white);
            box-shadow: 0 2px 8px rgba(0,87,204,0.15);
            position: sticky;
            top: 0;
            z-index: 999;
        }
        .nav-wrap {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 80px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo-img {
            width: 50px;
            height: 50px;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 24px;
        }
        .logo-text h1 {
            font-size: 24px;
            color: var(--main-blue);
        }
        .logo-text p {
            font-size: 12px;
            color: var(--text-gray);
        }
        .nav-list {
            display: flex;
            gap: 35px;
			font-weight:bold;
        }
        .nav-list li a {
            color: #333;
            font-size: 16px;
            font-weight: 500;
            padding: 10px 0;
            position: relative;
			font-weight:bold;
        }
        .nav-list li a.active {
            color: var(--main-blue);
        }
        .nav-list li a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: var(--main-blue);
            border-radius: 2px;
        }
        .tel-btn {
            background: var(--main-blue);
            color: white;
            padding: 10px 22px;
            border-radius: 30px;
        }
        /* 轮播横幅 */
        .banner {
            height: 520px;
            background: linear-gradient(rgba(22, 27, 84, 0.7), rgba(0, 87, 204, 0.3)), url(../images/banner.jpg) center/cover no-repeat;
            display: flex;
            align-items: center;
            color: white;
        }
        .banner-content h2 {
            font-size: 48px;
            margin-bottom: 20px;
            line-height: 1.3;
        }
        .banner-content p {
            font-size: 18px;
            margin-bottom: 35px;
            max-width: 600px;
            line-height: 1.8;
        }
        .banner-buttons a {
            display: inline-block;
            padding: 14px 36px;
            border-radius: 35px;
            font-size: 16px;
            font-weight: 500;
            margin-right: 20px;
        }
        .btn-blue {
            background: white;
            color: var(--main-blue);
        }
        .btn-trans {
            border: 2px solid white;
            color: white;
        }
        /* 通用板块标题 */
        .section-title {
            text-align: center;
            margin-bottom: 60px;
        }
        .section-title h3 {
            font-size: 32px;
            color: #222;
            position: relative;
            display: inline-block;
            padding-bottom: 15px;
        }
        .section-title h3::after {
            content: '';
            width: 80px;
            height: 4px;
            background: var(--main-blue);
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
            bottom: 0;
        }
        .section-title p {
            color: var(--text-gray);
            margin-top: 12px;
            font-size: 15px;
        }
        /* 业务板块 */
        .business {
            padding: 90px 0;
            background: var(--white);
        }
        .business-wrap {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 25px;
        }
        .business-card {
            background: var(--gray-bg);
            border-radius: 12px;
            overflow: hidden;
            transition: all 0.3s ease;
        }
        .business-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 10px 25px rgba(0,87,204,0.18);
        }
        .card-img {
            height: 180px;
            overflow: hidden;
        }
        .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s;
        }
        .business-card:hover .card-img img {
            transform: scale(1.1);
        }
        .card-text {
            padding: 22px;
        }
        .card-text h4 {
            font-size: 19px;
            color: #222;
            margin-bottom: 10px;
        }
        .card-text p {
            color: var(--text-gray);
            font-size: 14px;
            line-height: 1.7;
        }
        /* 平台优势 */
        .advantage {
            padding: 90px 0;
            background: var(--gray-bg);
        }
        .adv-wrap {
            display: flex;
            gap: 50px;
            align-items: center;
        }
        .adv-left {
            width: 50%;
        }
        .adv-left img {
            border-radius: 12px;
            box-shadow: 0 8px 20px rgba(0,87,204,0.12);
        }
        .adv-right {
            width: 50%;
        }
        .adv-item {
            display: flex;
            gap: 20px;
            margin-bottom: 30px;
        }
        .adv-icon {
            width: 60px;
            height: 60px;
            background: var(--main-blue);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 24px;
            flex-shrink: 0;
        }
        .adv-text h5 {
            font-size: 18px;
            margin-bottom: 8px;
            color: #222;
        }
        .adv-text p {
            color: var(--text-gray);
            line-height: 1.7;
            font-size: 14px;
        }
        /* 合作案例 */
        .case {
            padding: 90px 0;
        }
        .case-wrap {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 25px;
        }
        .case-card {
            border-radius: 10px;
            overflow: hidden;
            position: relative;
        }
        .case-card img {
            height: 240px;
            width: 100%;
            object-fit: cover;
        }
        .case-mask {
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            padding: 20px;
            background: linear-gradient(transparent, rgba(0,0,0,0.7));
            color: white;
        }
        .case-mask h4 {
            font-size: 18px;
            margin-bottom: 6px;
        }
        /* 资讯新闻 */
        .news {
            padding: 90px 0;
            background: var(--gray-bg);
        }
        .news-wrap {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 25px;
        }
        .news-card {
            background: white;
            border-radius: 12px;
            overflow: hidden;
        }
        .news-img {
            height: 160px;
        }
        .news-content {
            padding: 20px;
        }
        .news-date {
            color: var(--main-blue);
            font-size: 13px;
            margin-bottom: 10px;
        }
        .news-content h4 {
            font-size: 17px;
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .news-content h4 a {
            color: #222;
        }
        .news-content h4 a:hover {
            color: var(--main-blue);
        }
        .news-desc {
            color: var(--text-gray);
            font-size: 14px;
            line-height: 1.6;
        }
        /* 联系我们 */
        .contact {
            padding: 90px 0;
            color: white;
        }
        .contact-wrap {
            display: flex;
			color:#000000;
            gap: 60px;
        }
        .contact-left {
            width: 50%;
        }
        .contact-left h3 {
            font-size: 30px;
            margin-bottom: 25px;
        }
        .contact-left p {
            line-height: 1.8;
            margin-bottom: 30px;
            opacity: 0.9;
        }
        .contact-info li {
            display: flex;
            gap: 15px;
            margin-bottom: 20px;
            align-items: center;
        }
        .contact-info i {
            font-size: 22px;
            width: 40px;
        }
        .contact-right {
            width: 50%;
            background: white;
            padding: 35px;
            border-radius: 12px;
        }
        .contact-right h4 {
            color: #222;
            font-size: 22px;
            margin-bottom: 25px;
            color: var(--deep-blue);
        }
        .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 18px;
            margin-bottom: 18px;
        }
        .form-item input, .form-item textarea {
            width: 100%;
            height: 45px;
            padding: 0 15px;
            border: 1px solid #ddd;
            border-radius: 6px;
            font-size: 14px;
        }
        .form-item textarea {
            height: 110px;
            padding: 12px 15px;
            resize: none;
        }
        .submit-btn {
            width: 100%;
            height: 48px;
            background: var(--main-blue);
            color: white;
            border: none;
            border-radius: 6px;
            font-size: 16px;
            cursor: pointer;
        }
		
        /* ========== 新增APP下载板块样式 ========== */
        .app-download {
            padding: 90px 0;
            background: linear-gradient(120deg,#0d57c2,#082449);
            color:#fff;
        }
        .app-wrap {
            display:flex;
            align-items:center;
            gap:60px;
        }
        .app-text {
            width:55%;
        }
        .app-text h3 {
            font-size:36px;
            margin-bottom:20px;
        }
        .app-text p {
            font-size:17px;
            line-height:1.8;
            opacity:0.9;
            margin-bottom:35px;
        }
        .app-buttons a {
            display:inline-block;
            padding:14px 30px;
            background:#0066CC;
            color:var(--blue-main);
            border-radius:6px;
            font-size:16px;
            font-weight:bold;
            margin-right:20px;
            transition:0.3s;
        }
        .app-buttons a:hover {
            background:#3b93ff;
            color:#fff;
        }
        .app-qrcode {
            width:45%;
            display:flex;
            gap:30px;
            justify-content:center;
        }
        .qr-item {
            text-align:center;
        }
        .qr-item img {
            width:140px;
            height:140px;
            background:#fff;
            padding:10px;
            border-radius:8px;
            margin-bottom:12px;
        }
        .qr-item span {
            font-size:15px;
            opacity:0.9;
        }
		
				
        /* 页脚 */
        footer {
            background: #0a2342;
            color: #b8c7e0;
            padding: 60px 0 30px;
        }
        .footer-wrap {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-logo h2 {
            color: white;
            font-size: 22px;
            margin-bottom: 15px;
        }
        .footer-logo p {
            line-height: 1.7;
            font-size: 14px;
        }
        .footer-title {
            color: white;
            font-size: 18px;
            margin-bottom: 22px;
            padding-bottom: 10px;
            border-bottom: 1px solid #1f3b64;
        }
        .footer-links li {
            margin-bottom: 12px;
        }
        .footer-links a {
            color: #b8c7e0;
            font-size: 14px;
        }
        .copyright {
            text-align: center;
            padding-top: 25px;
            border-top: 1px solid #1f3b64;
            font-size: 14px;
        }
        /* 响应式适配 */
        @media(max-width:1200px) {
            .container {width: 100%;}
        }
        @media(max-width:992px) {
            .business-wrap {grid-template-columns: repeat(2,1fr);}
            .adv-wrap, .contact-wrap {flex-direction: column;}
            .adv-left, .adv-right, .contact-left, .contact-right {width:100%;}
            .case-wrap, .news-wrap {grid-template-columns: repeat(2,1fr);}
            .footer-wrap {grid-template-columns: repeat(2,1fr);}
        }
        @media(max-width:768px) {
            .nav-list {display: none;}
            .banner h2 {font-size:32px;}
            .business-wrap, .case-wrap, .news-wrap {grid-template-columns: 1fr;}
            .form-row {grid-template-columns: 1fr;}
        }