/* 所有样式保留，无修改 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: -apple-system, BlinkMacSystemFont, "Microsoft YaHei", sans-serif;
        }

        body {
            color: #333;
            line-height: 1.8;
            font-size: 16px;
            overflow-x: hidden;
        }

        a {
            text-decoration: none;
            color: inherit;
        }

        .container {
            width: 100%;
            padding: 0 15px;
            margin: 0 auto;
        }

        .section-title {
            text-align: center;
            margin: 30px 0;
            color: #d32f2f;
            font-size: 28px;
            font-weight: 600;
        }

        .section-title::after {
            content: "";
            display: block;
            width: 40px;
            height: 3px;
            background: #2e7d32;
            margin: 8px auto 0;
        }

        /* 导航 */
        header {
            background: #fff;
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
            padding: 10px 0;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 999;
        }

        .navbar {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .logo img {
            height: 32px;
        }

        .logo-text {
            font-size: 17px;
            font-weight: 600;
            color: #d32f2f;
        }

        .menu-btn {
            width: 40px;
            height: 40px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            gap: 5px;
            background: transparent;
            border: none;
        }

        .menu-btn span {
            width: 26px;
            height: 2px;
            background: #333;
        }

        .nav-menu {
            position: fixed;
            top: 60px;
            left: 0;
            width: 100%;
            background: #fff;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
            flex-direction: column;
            padding: 10px 0;
            display: none;
        }

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

        .nav-menu li {
            list-style: none;
            padding: 12px 15px;
            border-bottom: 1px solid #f5f5f5;
        }

        .nav-menu li a {
            font-size: 18px;
        }

        /* 会员按钮样式 */
        .member-btn-group {
            display: flex;
            gap: 10px;
            margin-left: auto;
        }
        .member-btn {
            padding: 6px 12px;
            background: #d32f2f;
            color: #fff;
            border-radius: 4px;
            font-size: 16px;
            border: none;
            cursor: pointer;
        }
        .member-btn.outline {
            background: transparent;
            color: #d32f2f;
            border: 1px solid #d32f2f;
        }

        /* 英雄区 */
        .hero {
            background: linear-gradient(rgba(0, 0, 0, 0.4), rgba(0, 0, 0, 0.4)), url("https://picsum.photos/id/1060/1920/600") center/cover no-repeat;
            color: #fff;
            text-align: center;
            padding: 90px 15px 50px;
            margin-top: 60px;
        }

        .hero h1 {
            font-size: 34px;
            margin-bottom: 10px;
            line-height: 1.3;
        }

        .hero p {
            font-size: 18px;
            margin-bottom: 20px;
        }

        .btn {
            display: inline-block;
            padding: 12px 24px;
            background: #d32f2f;
            color: #fff;
            border-radius: 4px;
            font-size: 18px;
        }

        /* 公司介绍 */
        .company-intro {
            background: #f0f0f0;
            padding: 25px 0;
        }

        .intro-content {
            font-size: 17px;
            color: #666;
        }

        .intro-col {
            margin-bottom: 20px;
        }

        .intro-col h4 {
            font-size: 19px;
            color: #d32f2f;
            margin-bottom: 8px;
        }

        /* 核心服务（可点击） */
        .services {
            padding: 30px 0 40px;
        }

        .services-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 15px;
        }

        .service-card {
            background: #fff;
            padding: 20px 15px;
            border-radius: 8px;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
            text-align: center;
            cursor: pointer;
            transition: transform 0.2s;
        }

        .service-card:hover {
            transform: translateY(-3px);
        }

        .service-icon {
            font-size: 40px;
            color: #d32f2f;
            margin-bottom: 10px;
        }

        .service-card h3 {
            font-size: 19px;
            margin-bottom: 8px;
        }

        .service-card p {
            font-size: 16px;
            color: #666;
            line-height: 1.6;
        }

        /* 关于我们 */
        .about {
            background: #f9f9f9;
            padding: 30px 0;
        }

        .about-text h3 {
            font-size: 22px;
            color: #d32f2f;
            margin-bottom: 15px;
        }

        .about-text p,
        .about-text li {
            font-size: 17px;
            color: #666;
            margin-bottom: 8px;
        }

        .stats {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 15px;
            margin-top: 20px;
        }

        .stat-card {
            background: #fff;
            padding: 20px;
            border-radius: 8px;
            text-align: center;
        }

        .stat-card h4 {
            font-size: 28px;
            color: #d32f2f;
        }

        .stat-card p {
            font-size: 16px;
            color: #666;
        }

        /* 客户案例 */
        .cases {
            padding: 30px 0;
        }

        .cases-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 10px;
        }

        .case-item {
            background: #f5f5f5;
            padding: 12px 0;
            text-align: center;
            font-size: 16px;
            border-radius: 4px;
            border:3px solid #d32f2f;
        }

        /* 政策 */
        .policy {
            background: #f9f9f9;
            padding: 30px 0;
        }

        .policy-tabs {
            display: flex;
            gap: 8px;
            overflow-x: auto;
            padding-bottom: 5px;
        }

        .policy-tab {
            padding: 8px 10px;
            background: #fff;
            border-radius: 4px;
            font-size: 17px;
            white-space: nowrap;
        }

        .policy-tab.active {
            background: #d32f2f;
            color: #fff;
        }

        .policy-content {
            background: #fff;
            padding: 20px;
            border-radius: 8px;
            margin-top: 15px;
            display: none;
        }

        .policy-content.active {
            display: block;
        }

        .policy-content h3 {
            font-size: 19px;
            color: #d32f2f;
            margin-bottom: 15px;
        }

        .policy-item {
            padding: 10px 0;
            border-bottom: 1px solid #eee;
            font-size: 17px;
        }

        .policy-date {
            font-size: 15px;
            color: #999;
            text-align: right;
        }

        /* 联系 */
        .contact {
            background: #d32f2f;
            color: #fff;
            padding: 40px 0;
        }

        .contact-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 15px;
        }

        .contact-card {
            background: rgba(255, 255, 255, 0.1);
            padding: 20px;
            border-radius: 8px;
            text-align: center;
        }

        .contact-icon {
            font-size: 32px;
            margin-bottom: 10px;
        }

        .contact-card h3 {
            font-size: 18px;
            margin-bottom: 8px;
        }

        .contact-card p {
            font-size: 17px;
        }

        /* 页脚（折叠） */
        footer {
            background: #222;
            color: #999;
            padding: 30px 0 15px;
            font-size: 16px;
        }

        .footer-content {
            display: grid;
            grid-template-columns: 1fr;
            gap: 20px;
        }

        .footer-col {
            padding: 0 5px;
        }

        .footer-col:first-child {
            grid-column: 1 / -1;
        }

        .footer-col .logo-text {
            color: #fff;
            font-size: 18px;
            margin-bottom: 10px;
        }

        .footer-col p {
            font-size: 16px;
            line-height: 1.7;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 18px;
            margin-bottom: 10px;
        }

        .footer-col li {
            list-style: none;
            margin-bottom: 6px;
            font-size: 16px;
        }

        .footer-extra {
            display: none;
        }

        .footer-expanded .footer-extra {
            display: block;
        }

        .footer-toggle {
            text-align: center;
            padding: 10px 0;
            color: #d32f2f;
            font-size: 17px;
            cursor: pointer;
        }

        .copyright {
            text-align: center;
            padding-top: 15px;
            border-top: 1px solid #333;
            font-size: 14px;
        }

        /* 会员模态框样式（核心登录/注册功能） */
        .modal {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.5);
            display: none;
            justify-content: center;
            align-items: center;
            z-index: 9999;
            padding: 15px;
        }
        .modal.active {
            display: flex;
        }
        .modal-content {
            background: #fff;
            border-radius: 8px;
            width: 100%;
            max-width: 400px;
            padding: 25px;
            position: relative;
        }
        .modal-close {
            position: absolute;
            top: 15px;
            right: 15px;
            font-size: 20px;
            cursor: pointer;
            color: #666;
        }
        .modal-title {
            text-align: center;
            color: #d32f2f;
            font-size: 22px;
            margin-bottom: 20px;
        }
        .form-group {
            margin-bottom: 15px;
        }
        .form-group label {
            display: block;
            margin-bottom: 5px;
            font-size: 17px;
            color: #333;
        }
        .form-group input {
            width: 100%;
            padding: 10px;
            border: 1px solid #ddd;
            border-radius: 4px;
            font-size: 17px;
        }
        .form-submit {
            width: 100%;
            padding: 12px;
            background: #d32f2f;
            color: #fff;
            border: none;
            border-radius: 4px;
            font-size: 18px;
            cursor: pointer;
            margin-top: 10px;
        }
        .form-switch {
            text-align: center;
            margin-top: 15px;
            font-size: 16px;
        }
        .form-switch a {
            color: #d32f2f;
            cursor: pointer;
        }

        /* 登录状态提示 */
        .login-status {
            color: #d32f2f;
            font-size: 16px;
            margin-right: 10px;
        }

        @media (max-width: 375px) {
            .services-grid {
                grid-template-columns: 1fr;
            }

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

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

            .contact-grid {
                grid-template-columns: 1fr;
            }
            .member-btn-group {
                display: none;
            }
            .nav-menu .member-mobile {
                display: block;
            }
            /* 移动端字体适配 */
            body { font-size: 14px; }
            .section-title { font-size: 22px; }
            .logo-text { font-size: 15px; }
            .nav-menu li a { font-size: 16px; }
            .member-btn { font-size: 14px; }
            .hero h1 { font-size: 26px; }
            .hero p { font-size: 16px; }
            .btn { font-size: 16px; }
            .intro-content { font-size: 15px; }
            .intro-col h4 { font-size: 17px; }
            .service-icon { font-size: 32px; }
            .service-card h3 { font-size: 17px; }
            .service-card p { font-size: 14px; }
            .about-text h3 { font-size: 19px; }
            .about-text p, .about-text li { font-size: 15px; }
            .stat-card h4 { font-size: 24px; }
            .stat-card p { font-size: 14px; }
            .case-item { font-size: 14px; }
            .policy-tab { font-size: 15px; }
            .policy-content h3 { font-size: 17px; }
            .policy-item { font-size: 15px; }
            .policy-date { font-size: 13px; }
            .contact-icon { font-size: 28px; }
            .contact-card h3 { font-size: 16px; }
            .contact-card p { font-size: 15px; }
            footer { font-size: 14px; }
            .footer-col .logo-text { font-size: 16px; }
            .footer-col p, .footer-col li { font-size: 14px; }
            .footer-toggle { font-size: 15px; }
            .copyright { font-size: 12px; }
            .modal-title { font-size: 18px; }
            .form-group label, .form-group input { font-size: 15px; }
            .form-submit { font-size: 16px; }
            .form-switch { font-size: 14px; }
            .login-status { font-size: 14px; }
        }