:root {
            --primary-color: #1a3a8f;
            --primary-light: #2a56c6;
            --secondary-color: #ff6b35;
            --success-color: #28a745;
            --error-color: #e74c3c;
            --light-bg: #f8f9ff;
            --white: #ffffff;
            --gray-light: #f5f7fa;
            --gray-medium: #e9ecef;
            --gray-dark: #6c757d;
            --text-color: #333;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.12);
            --radius: 10px;
            --transition: all 0.3s ease;
        }

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

        body {
            font-family: 'Noto Sans SC', sans-serif;
            background-color: var(--gray-light);
            color: var(--text-color);
            line-height: 1.6;
            background-image: linear-gradient(135deg, rgba(26, 58, 143, 0.03) 0%, rgba(42, 86, 198, 0.03) 100%);
            min-height: 100vh;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
        }

        /* 头部样式 */
        header {
            text-align: center;
            margin-bottom: 30px;
            padding: 30px 20px;
            background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
            color: var(--white);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            position: relative;
            overflow: hidden;
        }

        header::before {
            content: "";
            position: absolute;
            top: -50%;
            right: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 1px, transparent 1px);
            background-size: 20px 20px;
            opacity: 0.2;
            transform: rotate(30deg);
        }

        .company-logo {
            font-size: 3.5rem;
            color: var(--white);
            margin-bottom: 15px;
            text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
        }

        header h1 {
            font-size: 2.2rem;
            margin-bottom: 15px;
            font-weight: 700;
            position: relative;
            display: inline-block;
        }

        header h1::after {
            content: "";
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background-color: var(--secondary-color);
            border-radius: 2px;
        }

        header p {
            font-size: 1.1rem;
            opacity: 0.9;
            max-width: 700px;
            margin: 0 auto;
            font-weight: 300;
        }

        /* 进度指示器 */
        .progress-container {
            display: flex;
            justify-content: space-between;
            margin-bottom: 30px;
            position: relative;
            counter-reset: step;
        }

        .progress-container::before {
            content: "";
            position: absolute;
            top: 50%;
            left: 0;
            right: 0;
            height: 4px;
            background-color: var(--gray-medium);
            transform: translateY(-50%);
            z-index: 1;
        }

        .progress-bar {
            position: absolute;
            top: 50%;
            left: 0;
            height: 4px;
            background-color: var(--primary-light);
            transform: translateY(-50%);
            z-index: 2;
            transition: width 0.5s ease;
            width: 50%;
        }

        .progress-step {
            width: 40px;
            height: 40px;
            background-color: var(--white);
            border: 3px solid var(--gray-medium);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: var(--gray-dark);
            position: relative;
            z-index: 3;
            transition: var(--transition);
        }

        .progress-step.active {
            border-color: var(--primary-light);
            background-color: var(--primary-light);
            color: var(--white);
            box-shadow: 0 0 0 5px rgba(42, 86, 198, 0.2);
        }

        .progress-step.completed {
            border-color: var(--primary-light);
            background-color: var(--primary-light);
            color: var(--white);
        }

        .progress-step.completed::after {
            content: "✓";
            font-size: 1.2rem;
        }

        /* 通知区域 */
        .notification {
            padding: 18px 24px;
            border-radius: var(--radius);
            margin-bottom: 25px;
            display: none;
            animation: slideDown 0.5s ease;
            box-shadow: var(--shadow);
        }

        @keyframes slideDown {
            from { opacity: 0; transform: translateY(-20px); }
            to { opacity: 1; transform: translateY(0); }
        }

        .success {
            background-color: rgba(40, 167, 69, 0.1);
            color: var(--success-color);
            border-left: 4px solid var(--success-color);
        }

        .error {
            background-color: rgba(231, 76, 60, 0.1);
            color: var(--error-color);
            border-left: 4px solid var(--error-color);
        }

        /* 加载动画 */
        .loading {
            display: none;
            text-align: center;
            margin: 30px 0;
        }

        .spinner {
            border: 4px solid rgba(0, 0, 0, 0.1);
            border-radius: 50%;
            border-top: 4px solid var(--primary-light);
            width: 50px;
            height: 50px;
            animation: spin 1s linear infinite;
            margin: 0 auto 15px;
        }

        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }

        /* 表单容器 - 优化为对称布局 */
        .form-container {
            display: grid;
            grid-template-columns: 1fr;
            gap: 30px;
            margin-bottom: 40px;
        }

        @media (min-width: 992px) {
            .form-container {
                grid-template-columns: 1fr 1fr;
                align-items: start;
            }
            
            .personal-info {
                grid-column: 1;
            }
            
            .exhibition-info {
                grid-column: 2;
            }
            
            .form-footer {
                grid-column: 1 / span 2;
            }
        }

        /* 表单区块 */
        .form-section {
            background: var(--white);
            padding: 35px;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            transition: var(--transition);
            border-top: 4px solid var(--primary-color);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .form-section:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-5px);
        }

        .form-section h2 {
            font-size: 1.6rem;
            color: var(--primary-color);
            margin-bottom: 25px;
            padding-bottom: 15px;
            border-bottom: 2px solid var(--gray-medium);
            display: flex;
            align-items: center;
        }

        .form-section h2 i {
            margin-right: 12px;
            color: var(--primary-light);
            background-color: rgba(42, 86, 198, 0.1);
            padding: 10px;
            border-radius: 50%;
            width: 50px;
            height: 50px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* 表单元素 */
        .form-group {
            margin-bottom: 25px;
            position: relative;
        }

        label {
            display: block;
            margin-bottom: 10px;
            font-weight: 600;
            color: var(--text-color);
            font-size: 1rem;
        }

        .required::after {
            content: " *";
            color: var(--error-color);
        }

        input, select, textarea {
            width: 100%;
            padding: 14px 18px;
            border: 2px solid var(--gray-medium);
            border-radius: 8px;
            font-size: 1rem;
            font-family: 'Noto Sans SC', sans-serif;
            transition: var(--transition);
            background-color: var(--white);
        }

        input:focus, select:focus, textarea:focus {
            outline: none;
            border-color: var(--primary-light);
            box-shadow: 0 0 0 3px rgba(42, 86, 198, 0.15);
        }

        textarea {
            min-height: 140px;
            resize: vertical;
            flex-grow: 1;
        }

        /* 展会类别选择 */
        .exhibition-categories {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 15px;
            margin-bottom: 20px;
        }

        .category-option {
            background: var(--light-bg);
            border: 2px solid var(--gray-medium);
            border-radius: 8px;
            padding: 20px 18px;
            cursor: pointer;
            transition: var(--transition);
            position: relative;
            display: flex;
            align-items: flex-start;
            min-height: 100px;
        }

        .category-option:hover {
            background: rgba(42, 86, 198, 0.05);
            border-color: rgba(42, 86, 198, 0.3);
            transform: translateY(-3px);
        }

        .category-option.selected {
            background: rgba(42, 86, 198, 0.1);
            border-color: var(--primary-light);
            box-shadow: 0 4px 12px rgba(42, 86, 198, 0.15);
        }

        /* 修复勾选框样式 */
        .category-option input[type="checkbox"] {
            position: absolute;
            opacity: 0;
            width: 100%;
            height: 100%;
            left: 0;
            top: 0;
            margin: 0;
            cursor: pointer;
            z-index: 2;
        }

        .category-option .custom-checkbox {
            width: 22px;
            height: 22px;
            border: 2px solid var(--gray-dark);
            border-radius: 4px;
            margin-right: 15px;
            flex-shrink: 0;
            position: relative;
            transition: var(--transition);
            background-color: var(--white);
            z-index: 1;
            margin-top: 2px;
        }

        .category-option input[type="checkbox"]:checked + .custom-checkbox {
            background-color: var(--primary-light);
            border-color: var(--primary-light);
        }

        .category-option input[type="checkbox"]:checked + .custom-checkbox::after {
            content: "";
            position: absolute;
            left: 50%;
            top: 50%;
            transform: translate(-50%, -50%) rotate(45deg);
            width: 6px;
            height: 12px;
            border: solid white;
            border-width: 0 2px 2px 0;
        }

        .category-option .category-content {
            flex-grow: 1;
            z-index: 1;
        }

        .category-option .category-title {
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--text-color);
            display: block;
            margin-bottom: 8px;
            line-height: 1.3;
        }

        .category-option .category-desc {
            font-size: 0.9rem;
            color: var(--gray-dark);
            line-height: 1.5;
            display: block;
        }

        /* 展会国家示例 */
        .country-examples {
            margin-top: 15px;
            padding: 15px;
            background-color: rgba(42, 86, 198, 0.05);
            border-radius: 8px;
            font-size: 0.9rem;
        }

        .country-examples h4 {
            color: var(--primary-color);
            margin-bottom: 8px;
            font-size: 1rem;
        }

        .country-list {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .country-tag {
            background-color: rgba(255, 255, 255, 0.8);
            border: 1px solid var(--gray-medium);
            border-radius: 15px;
            padding: 4px 12px;
            font-size: 0.85rem;
            color: var(--gray-dark);
        }

        /* 热门标签 */
        .hot-tag {
            background-color: var(--secondary-color);
            color: white;
            font-size: 0.75rem;
            padding: 3px 8px;
            border-radius: 12px;
            margin-left: 8px;
            vertical-align: middle;
            font-weight: 600;
        }

        /* 提交按钮区域 */
        .form-footer {
            text-align: center;
            padding: 35px 30px;
            background: var(--white);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            margin-top: 20px;
            grid-column: 1 / -1;
        }

        .submit-btn {
            background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
            color: var(--white);
            border: none;
            padding: 18px 50px;
            font-size: 1.2rem;
            font-weight: 600;
            border-radius: 50px;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: 0 6px 20px rgba(26, 58, 143, 0.3);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            position: relative;
            overflow: hidden;
        }

        .submit-btn:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(26, 58, 143, 0.4);
            background: linear-gradient(135deg, var(--primary-light) 0%, #3a66e6 100%);
        }

        .submit-btn:active {
            transform: translateY(-2px);
        }

        .submit-btn::before {
            content: "";
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
            transition: 0.5s;
        }

        .submit-btn:hover::before {
            left: 100%;
        }

        .submit-btn i {
            margin-left: 10px;
            font-size: 1.2rem;
        }

        /* 展会介绍区域 - 在表单之后 */
        .exhibition-intro {
            background: linear-gradient(135deg, rgba(26, 58, 143, 0.05) 0%, rgba(42, 86, 198, 0.05) 100%);
            border-radius: var(--radius);
            padding: 35px;
            margin-bottom: 40px;
            box-shadow: var(--shadow);
            border-left: 6px solid var(--primary-color);
        }

        .exhibition-intro h2 {
            color: var(--primary-color);
            font-size: 1.8rem;
            margin-bottom: 20px;
            text-align: center;
            position: relative;
            padding-bottom: 15px;
        }

        .exhibition-intro h2::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 100px;
            height: 3px;
            background: linear-gradient(to right, var(--primary-color), var(--primary-light));
            border-radius: 2px;
        }

        .intro-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 25px;
            margin-top: 25px;
        }

        @media (min-width: 768px) {
            .intro-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        .intro-item {
            background: var(--white);
            padding: 25px;
            border-radius: var(--radius);
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.05);
            transition: var(--transition);
            border-top: 4px solid transparent;
            height: 100%;
        }

        .intro-item:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
        }

        .intro-item.lighting {
            border-top-color: #ff6b35;
        }

        .intro-item.energy {
            border-top-color: #28a745;
        }

        .intro-item h3 {
            color: var(--primary-color);
            font-size: 1.4rem;
            margin-bottom: 15px;
            display: flex;
            align-items: center;
        }

        .intro-item h3 i {
            margin-right: 10px;
            background-color: rgba(42, 86, 198, 0.1);
            padding: 8px;
            border-radius: 50%;
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary-light);
        }

        .intro-item ul {
            margin-left: 20px;
            margin-top: 15px;
        }

        .intro-item li {
            margin-bottom: 8px;
            line-height: 1.5;
        }

        /* 万盛展览专业服务优势 - 在页脚上方 */
        .service-advantages {
            background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
            border-radius: var(--radius);
            padding: 40px 35px;
            margin-bottom: 40px;
            box-shadow: var(--shadow);
            color: var(--white);
        }

        .service-advantages h2 {
            color: var(--white);
            font-size: 1.8rem;
            margin-bottom: 30px;
            text-align: center;
            position: relative;
            padding-bottom: 15px;
        }

        .service-advantages h2::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 100px;
            height: 3px;
            background: var(--secondary-color);
            border-radius: 2px;
        }

        .advantages-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 25px;
        }

        @media (min-width: 768px) {
            .advantages-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (min-width: 992px) {
            .advantages-grid {
                grid-template-columns: repeat(4, 1fr);
            }
        }

        .advantage-item {
            background: rgba(255, 255, 255, 0.1);
            padding: 25px;
            border-radius: var(--radius);
            text-align: center;
            transition: var(--transition);
            border: 1px solid rgba(255, 255, 255, 0.2);
        }

        .advantage-item:hover {
            background: rgba(255, 255, 255, 0.15);
            transform: translateY(-5px);
        }

        .advantage-icon {
            font-size: 2.5rem;
            margin-bottom: 15px;
            color: var(--white);
        }

        .advantage-item h3 {
            font-size: 1.2rem;
            margin-bottom: 10px;
            color: var(--white);
        }

        .advantage-item p {
            font-size: 0.9rem;
            opacity: 0.9;
            line-height: 1.5;
        }

        /* 页脚 */
        footer {
            text-align: center;
            margin-top: 0;
            padding-top: 30px;
            border-top: 1px solid var(--gray-medium);
            color: var(--gray-dark);
            font-size: 0.95rem;
        }

        footer p {
            margin-bottom: 10px;
        }

        .contact-info {
            display: flex;
            justify-content: center;
            gap: 30px;
            margin-top: 20px;
            flex-wrap: wrap;
        }

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

        .contact-item i {
            color: var(--primary-light);
        }

        /* 表单验证样式 */
        .valid {
            border-color: var(--success-color) !important;
        }

        .invalid {
            border-color: var(--error-color) !important;
        }

        .form-group .error-message {
            color: var(--error-color);
            font-size: 0.85rem;
            margin-top: 5px;
            display: none;
        }

        .form-group.has-error .error-message {
            display: block;
        }

        /* 响应式调整 */
        @media (max-width: 767px) {
            .container {
                padding: 15px;
            }
            
            header {
                padding: 25px 15px;
                margin-bottom: 25px;
            }
            
            header h1 {
                font-size: 1.8rem;
            }
            
            header p {
                font-size: 1rem;
            }
            
            .form-section {
                padding: 25px 20px;
            }
            
            .exhibition-categories {
                grid-template-columns: 1fr;
            }
            
            .submit-btn {
                padding: 16px 35px;
                font-size: 1.1rem;
                width: 100%;
            }
            
            .contact-info {
                flex-direction: column;
                gap: 15px;
            }
            
            .exhibition-intro, .service-advantages {
                padding: 25px 20px;
            }
            
            .intro-item, .advantage-item {
                padding: 20px;
            }
        }

        /* 动画效果 */
        .fade-in {
            animation: fadeIn 0.8s ease;
        }

        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }

        .slide-up {
            animation: slideUp 0.6s ease;
        }

        @keyframes slideUp {
            from { opacity: 0; transform: translateY(30px); }
            to { opacity: 1; transform: translateY(0); }
        }
        
        .seo-content {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }
        
        .form-description {
            color: var(--gray-dark);
            font-size: 0.9rem;
            margin-bottom: 20px;
            line-height: 1.5;
        }
/******add***********/

      /* 添加点击展会标签的样式 */
        .country-tag {
            cursor: pointer;
            transition: all 0.3s ease;
            position: relative;
        }
        
        .country-tag:hover {
            background-color: var(--primary-color);
            color: white;
            transform: translateY(-2px);
            box-shadow: 0 4px 8px rgba(0, 123, 255, 0.3);
        }
        
        .country-tag.clicked {
            background-color: var(--success-color);
            color: white;
            border-color: var(--success-color);
        }
        
        .country-tag.clicked::after {
            content: " ✓";
            font-weight: bold;
        }
        
        .country-tag-tooltip {
            position: absolute;
            background-color: rgba(0, 0, 0, 0.8);
            color: white;
            padding: 5px 10px;
            border-radius: 4px;
            font-size: 0.8rem;
            bottom: 100%;
            left: 50%;
            transform: translateX(-50%);
            margin-bottom: 5px;
            white-space: nowrap;
            opacity: 0;
            transition: opacity 0.3s;
            pointer-events: none;
            z-index: 10;
        }
        
        .country-tag:hover .country-tag-tooltip {
            opacity: 1;
        }
        
        @media (max-width: 768px) {
            .country-tag-tooltip {
                display: none;
            }
        }