/*contact.css */
    /* 重置样式确保跨浏览器一致性 */
    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
    }
    
    body {
        font-family: Arial, "Microsoft YaHei", sans-serif;
        line-height: 1.6;
        color: #666;
        background-color: white;
        min-height: 60vh;
        display: flex;
        flex-direction: column;
        justify-content: center; /* 垂直居中 */
        align-items: center; /* 水平居中 */
        padding: 10px;
        overflow-x: auto;
    }

    body > * {
    width: 90%;
    max-width: 1080px;
    }
    
    .sticky-menu {
        position: fixed;
        top: 0;
        background: white;
        padding: 0px 0;
        box-shadow: 0 1px 1px rgba(0, 0, 0, 0.1);
        z-index: 1000;
        transition: all 0.3s ease;
    }
    
    
    
    .sticky-menu.scrolled .logo-content {
        opacity: 0;
        visibility: hidden;
        height: 0;
        max-height: 0;
        overflow: hidden;
    } 
    
    .sticky-menu.scrolled .menu-container {
        background-color: white !important;
    }
    
    .sticky-menu.scrolled .menu-link{
        color: #666;
        text-decoration: none !important;
    }  
    
    .sticky-menu.scrolled #menu-container-first,
    .sticky-menu.scrolled #menu-container-last {
        opacity: 1;
        visibility: visible;
    }
        
       /* 布局样式 */
   .header-content {
        display: flex;
        flex-direction: column;
        position: relative;
        width: 100%;
        /*height: 126px;*/
        max-height: 155px;
        max-width: 1080px;
        /*margin: 0 auto;
        padding: 0 0px;*/
    }
    
    .logo-content {
        display: flex;
        font-size: 1.1rem;
        position: relative;
        width: 100%;
        height: 80px;
        max-height: 80px;
        max-width: 1080px;
        margin: 0 auto;
        /*padding: 0 0px;*/
        transition: all 0.3s ease;
    }
    
       .logo-content a{
        color:#666;
        font-size:16px;
        text-decoration: none !important;
    }
    
    /* 头部样式 */
    header {
        color: white;
        padding: 1rem 0;
        box-shadow: 0 1px 1px rgba(0,0,0,0.1);
    }
    
    
    /* 导航样式 */
    .menu-container{
        /*background: linear-gradient(135deg, #6a11cb 0%, #2575fc 100%);*/
        background: rgb(215,96,32);
        display: flex;
        font-size: 1.0rem;
        justify-content: left;
        /*justify-content: center;
        /*margin-bottom: 3rem;*/
        width: 100vw;
        height:57px;
        /*max-width: 1200px;*/
        position:relative;
        left: calc(-50vw + 50%);
        right: calc(-50vw + 50%);
    }
    
    .menu-inner {
        display: flex;
        justify-content: left;
        width: 100%;
        max-width: 1080px; /* 限制内部内容宽度 */
        margin: 0 auto;
        font-size: 1.0rem;
        padding: 0 0px;
    }
    
    #menu-container-first{
        position: relative;
        display: flex;
        margin-left:0px;
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.3s ease, visibility 0.3s ease;
    }
    
    #menu-container-last{
        display: flex;
        position: relative;
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.3s ease, visibility 0.3s ease;
    }
    
    #menu-container-last a{
        font-size: 0.8rem;
        color:#666;
        text-decoration: none !important;
    }
    
   
    
    .menu-container-nav {
        display: flex;
        width:80%;
        position: relative;
       
    }
    .nav-menu {
        display: flex;
        /*background: white;*/
        border-radius: 1px;
        box-shadow: 0 1px 1px rgba(0, 0, 0, 0.1);
        overflow: visible; /* 关键修复：允许下拉菜单显示 */
    }
    
    .menu-item {
        display:flex;
        position: relative;
        list-style: none;
        padding: 1px 1px;
        width:110px;
        height:57px;
        justify-content:center;
        align-items:center;
    }
    
    .menu-link {
        display: flex;
        justify-content:center;
        align-items:center;
        width:100%;
        height:100%;
        text-decoration: none;
        color: white;
        transition: all 0.3s ease;
        border-right: 1px solid #f1f1f1;
        position: relative;
        z-index: 1;
    }
    
    .menu-item:last-child .menu-link {
        border-right: none;
    }
    
    .menu-link:hover {
        background: rgb(208,104,0);
        color: white;
    }
    
    /* 下拉菜单样式 - 关键修复 */
    .dropdown-menu {
        position: absolute;
        top: 100%;
        left: 0;
        background: white;
        min-width: 128px;
        box-shadow: 0 1px 1px rgba(0, 0, 0, 0.1);
        border-radius: 0 0 10px 10px;
        opacity: 0;
        visibility: hidden;
        transform: translateY(-10px);
        transition: all 0.3s ease;
        z-index: 1000; /* 提高z-index确保菜单显示在最前面 */
        padding: 5px 0; /* 添加内边距使悬停区域更大 */
    }
    
    /* 关键修复：确保悬停区域足够大 */
    .menu-item:hover .dropdown-menu {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }
    
    /* 添加一个透明的悬停区域，使菜单不会在鼠标移动时立即关闭 */
    .menu-item::after {
        content: '';
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        height: 1px; /* 悬停区域高度 */
        background: transparent;
        z-index: 999;
    }
    
    .dropdown-item {
        list-style: none;
        border-bottom: 1px solid #f1f1f1;
    }
    
    .dropdown-item:last-child {
        border-bottom: none;
    }
    
    .dropdown-link {
        display: block;
        padding: 0.8rem 1.5rem;
        text-decoration: none;
        color: #2c3e50;
        transition: all 0.2s ease;
    }
    
    .dropdown-link:hover {
        background: white;
        padding-left: 1.8rem;
    }
    
    /* 添加指示器 */
    .has-dropdown::after {
        content: "▼";
        font-size: 0.7rem;
        margin-left: 5px;
        display: inline-block;
        transition: transform 0.3s ease;
    }
    
    .menu-item:hover .has-dropdown::after {
        transform: rotate(180deg);
    }  
    
     #main-content{
        display: flex;
        flex-direction: row;
        max-width: 1080px;
        width:1080px;
        position: relative;
        flex: 1 0 auto;
        margin-top:150px;
        margin-bottom: 50px;
        justify-content: flex-start;
        align-items: left;
    }
    
    #container_main_left {
        margin-left: 10px;
        margin-top:15px ;
        left:15px;
		width: 240px;
		background: white;
		max-height:450px;
		min-height:450px;
		border-radius: 8px;
		box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
		overflow: hidden;
		position: relative;
		}
	
    	
	.about-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1px;
            width:100%;
            max-width: 900px;
            background:white;
            font-family: Arial, sans-serif;
            border-radius: 1px;
            box-shadow: 0 2px 1px rgba(0,0,0,0.1);
        }
        
    	.grid-item-first {
            background-color: rgb(215,96,32);
            border-radius: 8px;
            padding: 25px 15px;
            text-align: center;
            transition: all 0.3s ease;
            cursor: pointer;
        }
        
        .grid-item-first a {
            color:white;
            text-decoration: none !important;
        }   
        
        .grid-item {
            background-color: #f8f9fa;
            border: 1px solid #dee2e6;
            border-radius: 8px;
            padding: 25px 15px;
            text-align: center;
            transition: all 0.3s ease;
            cursor: pointer;
        }
        
        .grid-item:hover {
            background-color: #e3f2fd;
            border-color: #2196f3;
            transform: translateY(-3px);
            box-shadow: 0 4px 8px rgba(0,0,0,0.15);
        }
        
        .grid-item a {
            text-decoration: none;
            color: #2c3e50;
            font-weight: bold;
            font-size: 16px;
            display: block;
        }
        
        .grid-item:hover a {
            color: #1565c0;
        }
        
        .rqphoneweaddress{
            width: 90%;
            height: 261px;
            width: 241px;
            max-width: 241px;
            object-fit: cover;
        }    
    /* 右側主要布局器 */
    #container_main_right{
        top: 5%;
        margin-top:10px;
        margin-left:5%;
        width: 700px;
        /*height: 900px;*/
        min-height: 100px;
        position: relative;
    }
    
    #dynamic-content{
        top:1%;
        display: flex;
        position: relative;
    }

    .contact-us{
        display: flex;
        flex-direction: column;
        margin-top:10px ;
        margin-left:10px;
        margin-bottom: 10px;
    }
    
    .contact-us img{
        width:710px;
        height:459px;
        object-fit: cover;
    }
    
    .board-container {
            max-width: 1000px;
            margin: 0 auto;
            background: white;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            overflow: hidden;
        }
        
         .board-head{
            background: #3498db;
            color: white;
            padding: 25px;
            text-align: center;
        }
        
        h1 {
            font-size: 2.2rem;
            margin-bottom: 10px;
        }
        
        .subtitle {
            font-size: 1.1rem;
            opacity: 0.9;
        }
        
        .message-form {
            padding: 30px;
            border-bottom: 1px solid #eee;
        }
        
        .form-group {
            margin-bottom: 20px;
        }
        
        label {
            display: block;
            margin-bottom: 8px;
            font-weight: bold;
            color: #2c3e50;
        }
        
        input, textarea, select {
            width: 100%;
            padding: 12px 15px;
            border: 2px solid #e1e8ed;
            border-radius: 8px;
            font-size: 1rem;
            transition: border-color 0.3s;
        }
        
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: #3498db;
            box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
        }
        
        textarea {
            min-height: 120px;
            resize: vertical;
        }
        
        .file-upload {
            border: 2px dashed #bdc3c7;
            border-radius: 8px;
            padding: 20px;
            text-align: center;
            transition: all 0.3s;
            background: #f8f9fa;
        }
        
        .file-upload:hover {
            border-color: #3498db;
            background: #e8f4f8;
        }
        
        .file-upload.dragover {
            border-color: #2ecc71;
            background: #e8f6ef;
        }
        
        .file-input {
            display: none;
        }
        
        .upload-btn {
            background: #3498db;
            color: white;
            border: none;
            padding: 10px 20px;
            border-radius: 5px;
            cursor: pointer;
            font-size: 1rem;
            transition: background 0.3s;
            margin-bottom: 10px;
        }
        
        .upload-btn:hover {
            background: #2980b9;
        }
        
        .file-info {
            margin-top: 15px;
            font-size: 0.9rem;
            color: #7f8c8d;
        }
        
        .file-list {
            margin-top: 15px;
            max-height: 150px;
            overflow-y: auto;
        }
        
        .file-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 8px 12px;
            background: white;
            border: 1px solid #e1e8ed;
            border-radius: 5px;
            margin-bottom: 8px;
        }
        
        .file-name {
            flex: 1;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        
        .file-size {
            color: #7f8c8d;
            font-size: 0.85rem;
            margin: 0 10px;
        }
        
        .remove-file {
            background: #e74c3c;
            color: white;
            border: none;
            width: 24px;
            height: 24px;
            border-radius: 50%;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
        }
        
        .remove-file:hover {
            background: #c0392b;
        }
        
        .submit-btn {
            background: #2ecc71;
            color: white;
            border: none;
            padding: 14px 25px;
            font-size: 1.1rem;
            border-radius: 8px;
            cursor: pointer;
            transition: background 0.3s;
            width: 100%;
            font-weight: bold;
        }
        
        .submit-btn:hover {
            background: #27ae60;
        }
        
        .submit-btn:disabled {
            background: #bdc3c7;
            cursor: not-allowed;
        }
        
        .messages-section {
            padding: 30px;
        }
        
        .section-title {
            color: #2c3e50;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid #3498db;
        }
        
        .message-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        
        .message-card {
            background: white;
            border-radius: 10px;
            box-shadow: 0 3px 10px rgba(0, 0, 0, 0.08);
            padding: 20px;
            border-left: 4px solid #3498db;
        }
        
        .message-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 15px;
        }
        
        .message-author {
            font-weight: bold;
            color: #2c3e50;
        }
        
        .message-date {
            color: #7f8c8d;
            font-size: 0.9rem;
        }
        
        .message-content {
            margin-bottom: 15px;
            line-height: 1.6;
        }
        
        .message-attachments {
            margin-top: 15px;
        }
        
        .attachments-title {
            font-size: 0.9rem;
            color: #7f8c8d;
            margin-bottom: 8px;
        }
        
        .attachment-list {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        
        .attachment-item {
            display: flex;
            align-items: center;
            background: #f8f9fa;
            border: 1px solid #e1e8ed;
            border-radius: 5px;
            padding: 8px 12px;
            font-size: 0.9rem;
        }
        
        .attachment-icon {
            margin-right: 8px;
            font-size: 1.2rem;
        }
        
        .attachment-link {
            color: #3498db;
            text-decoration: none;
        }
        
        .attachment-link:hover {
            text-decoration: underline;
        }
        
        .empty-state {
            text-align: center;
            padding: 40px;
            color: #7f8c8d;
        }
        
        .empty-state i {
            font-size: 3rem;
            margin-bottom: 15px;
            opacity: 0.5;
        }
        
        @media (max-width: 768px) {
            .container {
                border-radius: 0;
            }
            
            .message-form, .messages-section {
                padding: 20px;
            }
            
            .message-header {
                flex-direction: column;
                align-items: flex-start;
            }
            
            .message-date {
                margin-top: 5px;
            }
        }
        
        .file-type-pdf { color: #e74c3c; }
        .file-type-image { color: #3498db; }
        .file-type-other { color: #95a5a6; }

    
    footer{
        margin-top: 30px;
        position: relative;
        background: #333;
        color: white;
        padding: 20px 0;
        width: 100%;
        text-align: center;
        
    }
    .footer-container{
        display: flex;
        text-align: center;
        align-content: center;
    }
    
    .footer-container p{
        align-content: center;
        margin-left:40%;
        text-align: center;
    }
    /* 浏览器兼容性提示 */
    .browser-warning {
        background: #ffc107;
        color: #333;
        padding: 1px;
        text-align: center;
        display: none;
    }