/* ========== 全局CSS变量：复用品牌统一样式 ========== */
        :root {
            /* 主色调：沉稳商务蓝 */
            --primary: #0066CC;
            --primary-light: #0080FF;
            --primary-hover: #0052A3;
            /* 文字色阶 */
            --text-main: #1E293B;
            --text-secondary: #475569;
            --text-light: #94A3B8;
            /* 背景色 */
            --bg-body: #F8FAFC;
            --bg-white: #FFFFFF;
            --bg-card: #F1F5F9;
            --bg-footer: #1E293B;
            --bg-form: #F9FBFD;
            /* 间距体系 */
            --gap-xs: 8px;
            --gap-sm: 16px;
            --gap-md: 24px;
            --gap-lg: 40px;
            --gap-xl: 60px;
            /* 字体体系 */
            --font-xs: 14px;
            --font-sm: 16px;
            --font-md: 18px;
            --font-lg: 22px;
            --font-xl: 32px;
            --font-2xl: 48px;
            /* 视觉质感 */
            --shadow-sm: 0 4px 12px rgba(0,0,0,0.05);
            --shadow-md: 0 8px 24px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 36px rgba(0,0,0,0.12);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
            /* 表单专属变量（保留，避免样式冲突） */
            --border-color: #E2E8F0;
            --border-focus: var(--primary-light);
        }

        /* ========== 基础重置 & 全局样式（复用） ========== */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: "Inter", "PingFang SC", "Microsoft Yahei", sans-serif;
        }
        body {
            color: var(--text-main);
            background-color: var(--bg-body);
            line-height: 1.8;
            scroll-behavior: smooth;
            letter-spacing: 0.3px;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        .container {
            width: 90%;
            max-width: 1440px;
            margin: 0 auto;
            padding: 0 var(--gap-sm);
        }
        button, .btn {
            cursor: pointer;
            border: none;
            transition: var(--transition);
        }

        /* ========== 导航栏（完全复用，保持交互一致） ========== */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background-color: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(12px);
            box-shadow: var(--shadow-sm);
            z-index: 999;
            padding: 20px 0;
            border-bottom: 1px solid rgba(0, 102, 204, 0.06);
        }
        .navbar .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo {
            font-size: 30px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 1.2px;
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 45px;
        }
        .nav-links li a {
            font-size: var(--font-md);
            font-weight: 500;
            position: relative;
        }
        /* 导航下划线动效 */
        .nav-links li a::after {
            content: "";
            position: absolute;
            bottom: -6px;
            left: 0;
            width: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--primary-light));
            border-radius: 1px;
            transition: width 0.35s ease-in-out;
        }
        .nav-links li a:hover {
            color: var(--primary);
        }
        .nav-links li a:hover::after {
            width: 100%;
        }
        .nav-links li a.active {
            color: var(--primary);
        }
        .nav-links li a.active::after {
            width: 100%;
        }
        .mobile-menu-btn {
            display: none;
            font-size: 28px;
            color: var(--text-main);
            background: transparent;
            padding: 5px 10px;
            border-radius: var(--radius-sm);
        }
        .mobile-menu-btn:hover {
            background-color: rgba(0, 102, 204, 0.05);
        }

        /* ========== Contact Banner：专属视觉，突出沟通属性 ========== */
        .contact-banner {
            margin-top: 98px;
            height: 400px;
            background: linear-gradient(135deg, #00397A 0%, var(--primary) 50%, var(--primary-light) 100%);
            color: var(--bg-white);
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 0 var(--gap-md);
            position: relative;
            overflow: hidden;
        }
        /* 专属纹理，增强科技感 */
        .contact-banner::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: url("data:image/svg+xml,%3Csvg width='80' height='80' viewBox='0 0 80 80' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.08'%3E%3Cpath d='M50 50c0-5.523 4.477-10 10-10s10 4.477 10 10-4.477 10-10 10c0 5.523-4.477 10-10 10s-10-4.477-10-10 4.477-10 10-10zM10 10c0-5.523 4.477-10 10-10s10 4.477 10 10-4.477 10-10 10c0 5.523-4.477 10-10 10S0 25.523 0 20s4.477-10 10-10zm10 8c4.418 0 8-3.582 8-8s-3.582-8-8-8-8 3.582-8 8 3.582 8 8 8zm40 40c4.418 0 8-3.582 8-8s-3.582-8-8-8-8 3.582-8 8 3.582 8 8 8z' /%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
            z-index: 1;
        }
        .banner-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 1000px;
        }
        .contact-banner h1 {
            font-size: var(--font-2xl);
            margin-bottom: var(--gap-md);
            font-weight: 700;
            letter-spacing: 1.5px;
            line-height: 1.2;
        }
        .contact-banner p {
            font-size: var(--font-lg);
            max-width: 850px;
            margin: 0 auto;
            opacity: 0.95;
            line-height: 1.7;
        }

        /* ========== 联系核心板块：仅保留联系方式 + 新增二维码 ========== */
        .contact-section {
            padding: var(--gap-xl) 0;
            background-color: var(--bg-white);
            margin: var(--gap-lg) auto;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
        }
        .contact-section .container {
            max-width: 1300px;
        }
        /* 通用板块标题样式（复用） */
        .section-header {
            text-align: center;
            margin-bottom: var(--gap-xl);
        }
        .section-header h2 {
            font-size: var(--font-xl);
            color: var(--text-main);
            margin-bottom: var(--gap-sm);
            font-weight: 700;
            letter-spacing: 1px;
            position: relative;
            display: inline-block;
        }
        .section-header h2::after {
            content: "";
            position: absolute;
            bottom: -12px;
            left: 50%;
            transform: translateX(-50%);
            width: 90px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--primary-light));
            border-radius: 2px;
        }
        .section-header p {
            font-size: var(--font-md);
            color: var(--text-secondary);
            max-width: 900px;
            margin: 0 auto;
            line-height: 1.8;
            margin-top: var(--gap-lg);
        }

        /* 调整联系方式布局：居中展示 */
        .contact-content {
            display: flex;
            justify-content: center;
            margin-bottom: var(--gap-xl);
        }

        /* 联系信息卡片组：调整宽度适配居中布局 */
        .contact-info {
            display: flex;
            flex-direction: column;
            gap: var(--gap-md);
            width: 100%;
            max-width: 800px;
        }
        .contact-card {
            background-color: var(--bg-card);
            border-radius: var(--radius-md);
            padding: var(--gap-md) var(--gap-lg);
            border: 1px solid rgba(0, 102, 204, 0.08);
            transition: var(--transition);
            display: flex;
            align-items: flex-start;
            gap: var(--gap-md);
        }
        /* 新增微信二维码卡片样式 */
        .wechat-card {
            background: linear-gradient(135deg, #EEF2FF 0%, #E0F2FE 100%);
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: var(--gap-lg);
        }
        .wechat-card .qrcode-img {
            width: 200px;
            height: 200px;
            border-radius: var(--radius-sm);
            border: 8px solid var(--bg-white);
            box-shadow: var(--shadow-sm);
            margin: 0 auto var(--gap-sm);
            /* 替换为你的微信二维码图片地址 */
            background: url("/css/PddScreenShot_20260121155252.png") center/cover no-repeat;
        }
        .wechat-card .info-content h3 {
            color: var(--primary);
            margin-bottom: var(--gap-xs);
        }
        .wechat-card .info-content p {
            color: var(--text-secondary);
            font-size: var(--font-sm);
        }
        .contact-card:hover {
            box-shadow: var(--shadow-md);
            border-color: rgba(0, 102, 204, 0.15);
        }
        .contact-card .icon {
            font-size: 32px;
            color: var(--primary-light);
            margin-top: 4px;
            min-width: 40px;
            text-align: center;
        }
        .contact-card .info-content h3 {
            font-size: var(--font-md);
            color: var(--primary);
            margin-bottom: var(--gap-xs);
            font-weight: 600;
        }
        .contact-card .info-content p {
            color: var(--text-secondary);
            font-size: var(--font-sm);
            line-height: 1.7;
        }
        .contact-card .info-content a {
            color: var(--primary);
            font-weight: 500;
        }
        .contact-card .info-content a:hover {
            color: var(--primary-hover);
            text-decoration: underline;
        }

        /* ========== 页脚（完全复用） ========== */
        .footer {
            background-color: var(--bg-footer);
            color: var(--bg-white);
            padding: var(--gap-xl) 0 30px;
            margin-top: var(--gap-xl);
        }
        .footer .container {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: var(--gap-xl);
        }
        .footer-col {
            flex: 1;
            min-width: 240px;
        }
        .footer-col h4 {
            font-size: var(--font-md);
            margin-bottom: var(--gap-lg);
            position: relative;
            padding-bottom: 10px;
            font-weight: 600;
            letter-spacing: 0.5px;
        }
        .footer-col h4::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 55px;
            height: 3px;
            background-color: var(--primary-light);
            border-radius: 1.5px;
        }
        .footer-col ul {
            list-style: none;
        }
        .footer-col ul li {
            margin-bottom: var(--gap-sm);
            font-size: var(--font-xs);
            color: var(--text-light);
        }
        .footer-col ul li a:hover {
            color: var(--primary-light);
            padding-left: 8px;
        }
        .footer-col p {
            color: var(--text-light);
            font-size: var(--font-xs);
            line-height: 1.8;
        }
        .copyright {
            text-align: center;
            margin-top: var(--gap-xl);
            padding-top: var(--gap-md);
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: var(--font-xs);
            color: var(--text-light);
            letter-spacing: 0.5px;
        }

        /* ========== 响应式适配：全终端友好展示 ========== */
        @media (max-width: 1200px) {
            .contact-content {
                gap: var(--gap-md);
            }
        }
        @media (max-width: 992px) {
            .nav-links {
                gap: 30px;
            }
            .contact-banner h1 {
                font-size: 40px;
            }
            .contact-banner p {
                font-size: 20px;
            }
            .section-header h2 {
                font-size: 28px;
            }
        }
        @media (max-width: 768px) {
            .mobile-menu-btn {
                display: block;
            }
            .nav-links {
                position: fixed;
                top: 98px;
                left: -100%;
                width: 100%;
                height: calc(100vh - 98px);
                background-color: var(--bg-white);
                flex-direction: column;
                align-items: center;
                justify-content: center;
                gap: 35px;
                transition: left 0.4s ease;
                box-shadow: var(--shadow-md);
            }
            .nav-links.active {
                left: 0;
            }
            .contact-banner {
                height: 320px;
            }
            .contact-banner h1 {
                font-size: 32px;
            }
            .contact-banner p {
                font-size: 18px;
            }
            .footer {
                padding: var(--gap-lg) 0 20px;
            }
            .footer .container {
                gap: var(--gap-lg);
            }
        }
        @media (max-width: 480px) {
            .contact-card {
                flex-direction: column;
                align-items: center;
                text-align: center;
            }
            .wechat-card .qrcode-img {
                width: 160px;
                height: 160px;
            }
        }