:root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #3b82f6;
            --secondary: #64748b;
            --success: #10b981;
            --error: #ef4444;
            --warning: #f59e0b;
            --light: #f8fafc;
            --dark: #1e293b;
            --darker: #0f172a;
            --border: #e2e8f0;
            --gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            --gradient-primary: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
            --shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
            --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.15);
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
            line-height: 1.6;
            color: var(--dark);
            background: #f8fafc;
            overflow-x: hidden;
        }
        
        .app-container {
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        
        /* 导航栏样式保持不变 */
        .navbar {
            background: rgba(255, 255, 255, 0.95);
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            backdrop-filter: blur(10px);
        }
        
        .nav-content {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 2rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .logo {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        
        .logo i {
            font-size: 2rem;
        }
        
        .nav-links {
            display: flex;
            list-style: none;
            gap: 2.5rem;
            align-items: center;
        }
        
        .nav-links a {
            text-decoration: none;
            color: var(--dark);
            font-weight: 500;
            transition: color 0.2s;
            position: relative;
        }
        
        .nav-links a:hover {
            color: var(--primary);
        }
        
        .nav-links a.active {
            color: var(--primary);
        }
        
        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--primary);
        }
        
        .nav-actions {
            display: flex;
            gap: 1rem;
            align-items: center;
        }
        
        .btn {
            padding: 0.75rem 1.5rem;
            border-radius: 10px;
            text-decoration: none;
            font-weight: 500;
            transition: all 0.3s;
            border: none;
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.95rem;
        }
        
        .btn-primary {
            background: var(--gradient-primary);
            color: white;
            box-shadow: var(--shadow);
        }
        
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-lg);
        }
        
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 1px solid var(--primary);
        }
        
        .btn-outline:hover {
            background: var(--primary);
            color: white;
        }
        
        /* 页面头部样式保持不变 */
        .page-header {
            background: var(--gradient);
            color: white;
            padding: 6rem 0 4rem;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        
        .page-header::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 100" fill="%23ffffff" opacity="0.1"><polygon points="1000,0 1000,100 0,100"></polygon></svg>');
            background-size: cover;
        }
        
        .header-content {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 2rem;
            position: relative;
            z-index: 1;
        }
        
        .page-title {
            font-size: 3.5rem;
            font-weight: 800;
            margin-bottom: 1rem;
            line-height: 1.1;
        }
        
        .page-subtitle {
            font-size: 1.3rem;
            opacity: 0.9;
            margin-bottom: 2.5rem;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
            font-weight: 300;
        }
        
        .header-stats {
            display: flex;
            justify-content: center;
            gap: 3rem;
            margin-top: 3rem;
        }
        
        .stat-item {
            text-align: center;
        }
        
        .stat-number {
            font-size: 2.5rem;
            font-weight: 700;
            display: block;
            margin-bottom: 0.5rem;
        }
        
        .stat-label {
            font-size: 1rem;
            opacity: 0.8;
        }
        
        /* 主内容区样式保持不变 */
        .main-content {
            max-width: 1400px;
            margin: 0 auto;
            padding: 3rem 2rem;
        }
        
        /* 搜索和筛选样式保持不变 */
        .filters-section {
            background: white;
            border-radius: 16px;
            padding: 2rem;
            margin-bottom: 3rem;
            box-shadow: var(--shadow);
        }
        
        .search-box {
            display: flex;
            gap: 1rem;
            margin-bottom: 1.5rem;
        }
        
        .search-input {
            flex: 1;
            padding: 1.2rem 1.5rem;
            border: 1px solid var(--border);
            border-radius: 12px;
            font-size: 1rem;
            transition: all 0.3s;
            background: var(--light);
        }
        
        .search-input:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
        }
        
        .filter-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem;
        }
        
        .filter-tag {
            padding: 0.7rem 1.5rem;
            background: var(--light);
            border-radius: 50px;
            font-size: 0.9rem;
            cursor: pointer;
            transition: all 0.3s;
            border: 1px solid transparent;
        }
        
        .filter-tag.active {
            background: var(--primary);
            color: white;
            box-shadow: var(--shadow);
        }
        
        .filter-tag:hover:not(.active) {
            background: white;
            border-color: var(--primary);
            color: var(--primary);
        }
        
        /* 企业分类样式保持不变 */
        .category-section {
            margin-bottom: 4rem;
        }
        
        .section-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 2rem;
        }
        
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--darker);
            display: flex;
            align-items: center;
            gap: 0.8rem;
        }
        
        .section-title i {
            color: var(--primary);
        }
        
        .section-count {
            background: var(--primary);
            color: white;
            padding: 0.3rem 0.8rem;
            border-radius: 20px;
            font-size: 0.9rem;
            font-weight: 600;
        }
        
        .companies-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
            gap: 2rem;
        }
        
        .company-card {
            background: white;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: all 0.4s;
            position: relative;
            border: 1px solid rgba(0,0,0,0.05);
        }
        
        .company-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-lg);
        }
        
        .company-card.featured::before {
            content: '推荐';
            position: absolute;
            top: 1rem;
            right: 1rem;
            background: var(--warning);
            color: white;
            padding: 0.3rem 0.8rem;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            z-index: 2;
        }
        
        /* 修改logo区域样式 */
        .company-logo {
            height: 130px;
            background: var(--light);
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            overflow: hidden;
        }
        
        .company-logo::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: var(--gradient-primary);
        }
        
        .company-logo img {
            max-width: 80%;
            max-height: 80%;
            object-fit: contain;
            transition: transform 0.3s ease;
        }
        
        .company-card:hover .company-logo img {
            transform: scale(1.05);
        }
        
        /* 文字logo样式 - 添加背景色 */
        .logo-text {
            padding: 2rem 2rem;
            border-radius: 12px;
            font-size: 1.8rem;
            font-weight: 700;
            text-align: center;
            color: white;
            box-shadow: var(--shadow);
            min-width: 95%;
            max-width: 97%;
            transition: all 0.3s ease;
        }
        
        .company-card:hover .logo-text {
            transform: scale(1.05);
            box-shadow: var(--shadow-lg);
        }
        
        /* 首字母logo样式 */
        .logo-initials {
            width: 80px;
            height: 80px;
            border-radius: 50%;
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 2.2rem;
            font-weight: 700;
            text-transform: uppercase;
            box-shadow: var(--shadow);
            transition: all 0.3s ease;
        }
        
        .company-card:hover .logo-initials {
            transform: scale(1.1);
            box-shadow: var(--shadow-lg);
        }
        
        .company-info {
            padding: 1.8rem;
        }
        
        .company-name {
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            color: var(--darker);
        }
        
        .company-industry {
            color: var(--secondary);
            font-size: 1rem;
            margin-bottom: 1.2rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        
        .company-industry i {
            color: var(--primary);
        }
        
        .company-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin-bottom: 1.5rem;
        }
        
        .company-tag {
            background: #f0f9ff;
            color: #0369a1;
            padding: 0.4rem 0.8rem;
            border-radius: 6px;
            font-size: 0.85rem;
            font-weight: 500;
        }
        
        .company-actions {
            display: flex;
            gap: 0.8rem;
        }
        
        .company-actions .btn {
            flex: 1;
            justify-content: center;
            font-size: 0.9rem;
            padding: 0.8rem;
        }
        
        /* 二维码弹窗样式保持不变 */
        .qr-modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.7);
            z-index: 2000;
            align-items: center;
            justify-content: center;
        }
        
        .qr-content {
            background: white;
            border-radius: 16px;
            padding: 2rem;
            text-align: center;
            max-width: 300px;
            width: 90%;
            box-shadow: var(--shadow-lg);
            position: relative;
        }
        
        .qr-close {
            position: absolute;
            top: 1rem;
            right: 1rem;
            background: none;
            border: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--secondary);
        }
        
        .qr-title {
            margin-bottom: 1.5rem;
            color: var(--darker);
            font-weight: 600;
        }
        
        .qr-image {
            width: 200px;
            height: 200px;
            margin: 0 auto 1.5rem;
            border: 1px solid var(--border);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: white;
        }
        
        .qr-image img {
            max-width: 100%;
            max-height: 100%;
        }
        
        /* 后台管理面板样式保持不变 */
        .admin-panel {
            background: white;
            border-radius: 16px;
            padding: 2rem;
            margin-top: 3rem;
            box-shadow: var(--shadow);
            display: none;
            border-left: 4px solid var(--warning);
        }
        
        .admin-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 2rem;
            padding-bottom: 1rem;
            border-bottom: 1px solid var(--border);
        }
        
        .admin-title {
            font-size: 1.5rem;
            font-weight: 600;
            color: var(--darker);
        }
        
        .admin-form {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.5rem;
            margin-bottom: 2rem;
        }
        
        .form-group {
            display: flex;
            flex-direction: column;
        }
        
        .form-label {
            margin-bottom: 0.5rem;
            font-weight: 500;
            color: var(--darker);
        }
        
        .form-input {
            padding: 0.8rem 1rem;
            border: 1px solid var(--border);
            border-radius: 8px;
            font-size: 1rem;
            transition: all 0.3s;
        }
        
        .form-input:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
        }
        
        .form-full {
            grid-column: 1 / -1;
        }
        
        .admin-table {
            width: 100%;
            border-collapse: collapse;
            margin-top: 1rem;
        }
        
        .admin-table th,
        .admin-table td {
            padding: 1rem;
            text-align: left;
            border-bottom: 1px solid var(--border);
        }
        
        .admin-table th {
            background: var(--light);
            font-weight: 600;
            color: var(--darker);
        }
        
        .admin-table tr:hover {
            background: #f8fafc;
        }
        
        .action-buttons {
            display: flex;
            gap: 0.5rem;
        }
        
        .btn-small {
            padding: 0.4rem 0.8rem;
            font-size: 0.8rem;
        }
        
        .btn-danger {
            background: var(--error);
            color: white;
        }
        
        /* 登录表单样式 */
        .admin-login-form {
            background: white;
            border-radius: 16px;
            padding: 2rem;
            margin: 2rem 0;
            box-shadow: var(--shadow);
            max-width: 400px;
            margin-left: auto;
            margin-right: auto;
            display: none;
        }
        
        .login-error {
            background: #fef2f2;
            color: #dc2626;
            padding: 0.75rem;
            border-radius: 8px;
            margin-bottom: 1rem;
            border: 1px solid #fecaca;
            display: none;
        }
        
        /* 页脚样式保持不变 */
        .footer {
            background: var(--darker);
            color: white;
            padding: 0 0 2rem;
            margin-top: auto;
        }
        
        .footer-content {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 2rem;
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 3rem;
        }
        
        .footer-section h3 {
            margin-bottom: 1.5rem;
            color: white;
            font-size: 1.2rem;
        }
        
        .footer-links {
            list-style: none;
        }
        
        .footer-links a {
            color: #cbd5e1;
            text-decoration: none;
            line-height: 2.2;
            transition: color 0.2s;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        
        .footer-links a:hover {
            color: white;
        }
        
        .copyright {
            text-align: center;
            padding-top: 3rem;
            border-top: 1px solid #374151;
            color: #9ca3af;
            font-size: 0.9rem;
        }
        
        /* 响应式设计保持不变 */
        @media (max-width: 1200px) {
            .companies-grid {
                grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            }
            
            .footer-content {
                grid-template-columns: 1fr 1fr 1fr;
            }
        }
        
        @media (max-width: 992px) {
            .page-title {
                font-size: 2.8rem;
            }
            
            .nav-links {
                gap: 1.5rem;
            }
            
            .admin-form {
                grid-template-columns: 1fr;
            }
        }
        
        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            
            .page-title {
                font-size: 2.2rem;
            }
            
            .header-stats {
                flex-direction: column;
                gap: 1.5rem;
            }
            
            .companies-grid {
                grid-template-columns: 1fr;
            }
            
            .footer-content {
                grid-template-columns: 1fr 1fr;
            }
            
            .section-header {
                flex-direction: column;
                align-items: flex-start;
                gap: 1rem;
            }
        }
        
        @media (max-width: 576px) {
            .nav-content, .header-content, .main-content, .footer-content {
                padding: 0 1rem;
            }
            
            .search-box {
                flex-direction: column;
            }
            
            .footer-content {
                grid-template-columns: 1fr;
            }
            
            .company-actions {
                flex-direction: column;
            }
            
            .logo-text {
                font-size: 1.4rem;
                padding: 0.8rem 1.5rem;
            }
            
            .logo-initials {
                width: 70px;
                height: 70px;
                font-size: 1.8rem;
            }
        }