/* Banner 样式 */
        .banner {
            width: 100%;
            height: 50vh;
            /* background-image 由PHP动态设置 */
            background-size: cover;
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .banner::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(255, 255, 255, 0.3);
        }

        .banner h1 {
            position: relative;
            font-size: 48px;
            color: #333;
            text-transform: uppercase;
            font-weight: 900;
            letter-spacing: 2px;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
            transform: rotate(-3deg);
        }

        /* 面包屑导航 */
        .mbx {
            font-size: 1rem;
            color: #4d4d4d;
            font-family: Arial, sans-serif;
            background: #eee;
            padding: 1.5rem 0;
            /* margin-bottom: 2rem; */
        }

        .mbx span {
            color: var(--primary-orange);
            font-weight: bold;
        }

        /* --- 2. 顶部导航 (Header) --- */
        .top-bar {
            background: #111;
            color: #ccc;
            font-size: 13px;
            padding: 10px 0;
            border-bottom: 1px solid #222;
        }

        .top-bar .container {
            display: flex;
            justify-content: space-between;
            width: 100%;
        }

        :root {
            --primary-orange: #ff6600;
            --primary-hover: #e65c00;
            --text-dark: #1a1a1a;
            --text-gray: #666;
            --bg-light: #f8f9fa;
            --container-width: 1470px;
            --shadow-card: 0 10px 30px rgba(0, 0, 0, 0.08);
            --shadow-hover: 0 15px 40px rgba(0, 0, 0, 0.12);
            --transition: all 0.3s ease;
        }

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

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-family: 'Poppins', sans-serif;
            color: var(--text-dark);
            font-weight: 700;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }

        ul {
            list-style: none;
        }

        img {
            max-width: 100%;
            display: block;
        }

        .container {
            max-width: var(--container-width) !important;
            margin: 0 auto;
            padding: 0 20px;
        }


        header {
            background: #fff;
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
            padding: 0;
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        .header-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 80px;
        }

        .logo {
            font-size: 28px;
            font-weight: 800;
            font-family: 'Poppins', sans-serif;
            display: flex;
            align-items: center;
            color: #000;
            letter-spacing: -1px;
        }

        .logo i {
            color: var(--primary-orange);
            margin-right: 10px;
            font-size: 32px;
        }

        nav ul {
            display: flex;
            gap: 40px;
            align-items: center;
        }

        nav a {
            font-weight: 600;
            font-size: 15px;
            text-transform: uppercase;
            color: #333;
            position: relative;
        }

        nav a::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary-orange);
            transition: 0.3s;
        }

        nav a:hover::after,
        nav a.active::after {
            width: 100%;
        }

        nav a:hover,
        nav a.active {
            color: var(--primary-orange);
        }

        /* 定义自定义颜色 */


        /* 基础重置 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: Arial, sans-serif;
        }

        .container {
            max-width: 1470px;
            margin: 0 auto;
            padding: 0 20px;
        }

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

        .text-center {
            text-align: center;
        }

        /* 悬浮侧边栏 */
        .float-sidebar {
            position: fixed;
            right: 0;
            top: 40%;
            z-index: 1001;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .float-btn {
            width: 45px;
            height: 45px;
            background-color: var(--primary-orange);
            color: #fff;
            border-radius: 50%;
            display: flex;
            justify-content: center;
            align-items: center;
            font-size: 20px;
            cursor: pointer;
            box-shadow: 0 2px 5px rgba(0,0,0,0.2);
            margin-right: 10px;
        }

        .float-btn:hover {
            transform: scale(1.1);
        }

        /* 头部样式 */
        .top-header {
            background: #1a1a1a;
            color: #ccc;
            font-size: 12px;
            padding: 8px 0;
        }

        .top-links a {
            color: #ccc;
            text-decoration: none;
            margin: 0 5px;
        }

        .social-icons i {
            margin-left: 10px;
            cursor: pointer;
        }

        .logo-bar {
            background: #fff;
            padding: 20px 0;
        }

        .search-container {
            position: relative;
            width: 300px;
        }

        .search-container input {
            width: 100%;
            padding: 8px 15px;
            border: 1px solid #ddd;
            background: #eee;
        }

        .search-container button {
            position: absolute;
            right: 0;
            top: 0;
            height: 100%;
            padding: 0 15px;
            background: #333;
            color: white;
            border: none;
            cursor: pointer;
        }

        .main-nav {
            background: #1a1a1a;
        }

        .main-nav ul {
            list-style: none;
            display: flex;
        }

        .main-nav ul li a {
            display: block;
            padding: 15px 25px;
            color: white;
            text-decoration: none;
            font-weight: bold;
            font-size: 14px;
        }

        .main-nav ul li.active {
            background: #D15A24;
        }

        /* Banner & Breadcrumb */
        .hero-banner img {
            width: 100%;
            height: 60vh;
            display: block;
        }

        .breadcrumb {
            padding: 20px 0;
            color: #888;
            font-size: 14px;
        }

        .breadcrumb span {
            color: #D15A24;
        }

        /* FAQ Search */
        .faq-search-section {
            background: #f2f2f5;
            padding: 74px 0;
        }

        .faq-search-section h2 {
            font-size: 28px;
            margin-bottom: 20px;
            color: #333;
        }

        .faq-search-box {
            position: relative;
            max-width: 600px;
            margin: 0 auto 20px;
        }

        .faq-search-box input {
            width: 100%;
            padding: 15px 20px;
            border: 1px solid #ddd;
            border-radius: 30px;
        }

        .faq-search-box i {
            position: absolute;
            right: 15px;
            top: 15px;
            color: #D15A24;
        }

        .faq-subtitle {
            color: #888;
            font-size: 14px;
        }

        /* FAQ Content */
        .flex-container {
            display: flex;
            gap: 30px;
            padding: 50px 0;
            align-items: flex-start;
        }

        .faq-list {
            flex: 2;
        }

        .faq-item {
            background: #fff;
            padding: 15px 20px;
            border: 1px solid #eee;
            cursor: pointer;
            transition: 0.3s;
        }

        .faq-item:hover {
            border-color: #D15A24;
        }

        .faq-item span {
            color: #D15A24;
            font-weight: bold;
            margin-right: 10px;
        }

        .quick-contact-card {
            flex: 1;
            background: #fff;
            padding: 30px;
            border: 1px solid #eee;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        }

        .quick-contact-card h3 {
            margin-bottom: 20px;
            border-bottom: 2px solid #D15A24;
            display: inline-block;
            padding-bottom: 5px;
        }

        .quick-contact-card input,
        .quick-contact-card textarea {
            width: 100%;
            padding: 10px;
            margin-bottom: 15px;
            border: 1px solid #eee;
            background: #fcfcfc;
        }

        .quick-contact-card textarea {
            height: 100px;
        }

        .quick-contact-card button {
            width: 100%;
            padding: 12px;
            background: #D15A24;
            color: white;
            border: none;
            font-weight: bold;
            cursor: pointer;
        }

        /* Map & Callback Overlay */
        .map-section {
            position: relative;
            margin-top: 50px;
        }

        .callback-overlay {
            position: absolute;
            top: 90%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 100%;
            max-width: 500px;
        }

        .callback-card {
            background: white;
            padding: 40px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            text-align: center;
        }

        .callback-card h3 {
            font-size: 24px;
            margin-bottom: 25px;
        }

        .callback-card input,
        .callback-card textarea {
            width: 100%;
            padding: 12px;
            margin-bottom: 15px;
            border: none;
            background: #f4f4f4;
        }

        .callback-card textarea {
            height: 80px;
        }

        .black-btn {
            width: 100%;
            padding: 12px;
            background: #000;
            color: white;
            border: none;
            cursor: pointer;
            text-transform: uppercase;
            font-weight: bold;
        }

        /* Footer */
        footer {
            background: #1a1a1a;
            color: white;
            padding: 60px 0 20px;
            margin-top: 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 2fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-logo {
            color: white;
            font-size: 30px;
            margin-bottom: 10px;
        }

        .footer-social i {
            font-size: 20px;
            margin-right: 15px;
            margin-top: 20px;
            color: #ccc;
            cursor: pointer;
        }

        .footer-contact p {
            margin-bottom: 12px;
            color: #ccc;
            font-size: 14px;
            display: flex;
            align-items: flex-start;
        }

        .footer-contact i {
            margin-right: 15px;
            color: #D15A24;
            margin-top: 4px;
        }

        .footer-qr img {
            width: 100px;
            background: white;
            padding: 5px;
        }

        .copyright {
            border-top: 1px solid #333;
            padding-top: 20px;
            text-align: center;
            font-size: 12px;
            color: #666;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {

            .flex-container,
            .footer-grid {
                flex-direction: column;
                grid-template-columns: 1fr;
            }

            .logo-bar .flex-between {
                flex-direction: column;
                gap: 20px;
            }

            .main-nav ul {
                flex-wrap: wrap;
            }
        }

        /* FAQ 容器组 */
        .faq-group {
            margin-bottom: 10px;
            border: 1px solid #eee;
            background: #fff;
        }

        /* 标题样式 */
        .faq-item {
            padding: 15px 20px;
            cursor: pointer;
            font-weight: bold;
            display: flex;
            align-items: center;
            transition: background 0.3s;
            user-select: none;
            /* 防止频繁点击选中文字 */
        }

        .faq-item:hover {
            background-color: #fcfcfc;
        }

        .faq-item span {
            color: #D15A24;
            margin-right: 10px;
        }

        /* 隐藏的内容区域 */
        .faq-answer {
            max-height: 0;
            /* 初始高度为0 */
            overflow: hidden;
            /* 隐藏溢出内容 */
            transition: max-height 0.3s ease-out, padding 0.3s ease;
            /* 平滑过渡动画 */
            background: #fff;
        }

        .faq-answer p {
            padding: 20px;
            /* 左侧留出 Q. 的间距 */
            color: #666;
            font-size: 14px;
            line-height: 1.8;
        }

        /* 激活状态（通过 JS 切换） */
        .faq-group.active .faq-answer {
            max-height: 200px;
            /* 展开后的高度，可根据内容多少调整 */
        }

        .faq-group.active .faq-item {
            color: #D15A24;
            /* 展开时标题颜色变化 */
        }

        /* --- 9. Map & Callback --- */
        .map-section {
            position: relative;
            height: 550px;
            background: url('/img/map.jpg') center/cover;
        }

        .contact-form-wrapper {
            position: absolute;
            top: 100%;
            left: 50%;
            transform: translate(-50%, -50%);
            background: rgba(255, 255, 255, 0.95);
            padding: 50px;
            width: 450px;
            border-radius: 10px;
            box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
            text-align: center;
            backdrop-filter: blur(5px);
        }

        .contact-form-wrapper h3 {
            margin-bottom: 25px;
            font-size: 24px;
        }

        .form-group {
            margin-bottom: 15px;
        }

        .form-input {
            width: 100%;
            padding: 15px;
            border: 1px solid #ddd;
            border-radius: 5px;
            background: #f9f9f9;
            font-family: inherit;
            font-size: 14px;
            outline: none;
            transition: 0.3s;
        }

        .form-input:focus {
            border-color: var(--primary-orange);
            background: #fff;
        }

        .submit-btn {
            background: #111;
            color: #fff;
            width: 100%;
            padding: 15px;
            border: none;
            cursor: pointer;
            font-weight: 700;
            text-transform: uppercase;
            border-radius: 5px;
            transition: 0.3s;
        }

        .submit-btn:hover {
            background: var(--primary-orange);
        }

        /* --- 10. Footer --- */
        footer {
            background: #111;
            color: #fff;
            padding: 80px 0 30px;
            font-size: 14px;
        }

        .footer-top {
            display: grid;
            grid-template-columns: 1fr 2fr;
            gap: 100px;
            padding-bottom: 50px;
            /* border-bottom: 1px solid #333; */
        }

        .footer-col h4 {
            color: #fff;
            margin-bottom: 25px;
            font-size: 18px;
            position: relative;
            display: inline-block;
        }

        .footer-col h4::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -8px;
            width: 30px;
            height: 2px;
            background: var(--primary-orange);
        }
        .footer-col:last-child {
            text-align: left;
            margin-left: auto;
            max-width: 500px;
            padding-left: 250px;
        }

        .footer-col:last-child h4 {
            display: inline-block;
        }

        .footer-col:last-child .footer-info-item {
            justify-content: flex-start;
            align-items: flex-start;
        }

        .footer-col:last-child .footer-info-item span {
            word-wrap: break-word;
            word-break: break-word;
            white-space: normal;
        }

        .footer-info-item {
            display: flex;
            margin-bottom: 15px;
            gap: 15px;
            color: #aaa;
        }

        .footer-info-item i {
            color: var(--primary-orange);
            margin-top: 4px;
        }

        .social-icons {
            margin-top: 20px;
            display: flex;
            gap: 15px;
        }

        .social-icons a {
            width: 36px;
            height: 36px;
            background: #333;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: 0.3s;
            color: #fff;
        }

        /* 下拉菜单样式 */
        .dropdown {
            position: relative;
        }

        .dropdown-menu {
            position: absolute;
            top: 100%;
            left: 0;
            background: #fff;
            min-width: 180px;
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
            border-radius: 4px;
            opacity: 0;
            visibility: hidden;
            transform: translateY(-10px);
            transition: all 0.3s ease;
            z-index: 1000;
            border-top: 3px solid var(--primary-orange);
        }

        .dropdown:hover .dropdown-menu {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .dropdown-menu a {
            display: block;
            padding: 12px 20px;
            color: #333;
            font-size: 14px;
            font-weight: 500;
            text-transform: none;
            border-bottom: 1px solid #f0f0f0;
            transition: all 0.3s ease;
        }

        .dropdown-menu a:last-child {
            border-bottom: none;
        }

        .dropdown-menu a:hover {
            background: #f8f9fa;
            color: var(--primary-orange);
            padding-left: 25px;
        }

        .dropdown-menu a::after {
            display: none;
        }

        .social-icons a:hover {
            background: var(--primary-orange);
            transform: rotate(360deg);
        }

        .btn:hover {
            background: var(--primary-hover);
            transform: translateY(-3px);
            box-shadow: 0 8px 20px rgba(255, 102, 0, 0.4);
            color: #fff;
            border: none;
        }

        .copyright {
            text-align: center;
            padding-top: 30px;
            color: #666;
            font-size: 13px;
        }
    


/* ========================================
   About4 页面响应式优化补充
   ======================================== */

/* 手机端 (< 640px) */
@media (max-width: 640px) {
    .hero-banner img {
        height: 200px;
        object-fit: cover;
    }
    
    .faq-search-section {
        padding: 30px 0;
    }
    
    .faq-search-section h2 {
        font-size: 24px;
        margin-bottom: 20px;
    }
    
    .faq-search-box {
        width: 100%;
        max-width: 100%;
    }
    
    .faq-search-box input {
        font-size: 13px;
        padding: 12px 15px;
    }
    
    .faq-subtitle {
        font-size: 12px;
    }
    
    .faq-main-content {
        padding: 30px 0;
    }
    
    .faq-list {
        width: 100%;
    }
    
    .faq-item {
        font-size: 14px;
        padding: 15px;
    }
    
    .faq-answer p {
        font-size: 13px;
        padding: 15px;
    }
    
    .quick-contact-card {
        width: 100%;
        padding: 20px;
        margin-top: 30px;
    }
    
    .quick-contact-card h3 {
        font-size: 18px;
    }
    
    .quick-contact-card input,
    .quick-contact-card textarea {
        font-size: 13px;
        padding: 10px;
    }
    
    .quick-contact-card button {
        font-size: 13px;
        padding: 12px;
    }
}