/* ===== 基础重置 ===== */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f8f9fa;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: all 0.3s ease;
        }

        ul, ol {
            list-style: none;
        }

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

        .clearfix::after {
            content: '';
            display: table;
            clear: both;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* ===== 工具类 ===== */
        .text-center { text-align: center; }
        .text-right { text-align: right; }
        .text-left { text-align: left; }
        
        .d-flex { display: flex; }
        .flex-column { flex-direction: column; }
        .align-center { align-items: center; }
        .justify-between { justify-content: space-between; }
        .justify-center { justify-content: center; }
        
        .mt-1 { margin-top: 0.5rem; }
        .mt-2 { margin-top: 1rem; }
        .mt-3 { margin-top: 1.5rem; }
        .mt-4 { margin-top: 2rem; }
        
        .mb-1 { margin-bottom: 0.5rem; }
        .mb-2 { margin-bottom: 1rem; }
        .mb-3 { margin-bottom: 1.5rem; }
        .mb-4 { margin-bottom: 2rem; }
        
        .p-1 { padding: 0.5rem; }
        .p-2 { padding: 1rem; }
        .p-3 { padding: 1.5rem; }
        .p-4 { padding: 2rem; }
        
        .w-100 { width: 100%; }
        .h-100 { height: 100%; }
        
        .bg-light { background-color: #f8f9fa; }
        .bg-white { background-color: #ffffff; }
        .bg-primary { background-color: #2c3e50; }
        
        .text-primary { color: #2c3e50; }
        .text-secondary { color: #7f8c8d; }
        .text-success { color: #27ae60; }
        .text-danger { color: #e74c3c; }
        .text-warning { color: #f39c12; }
        
        .shadow-sm { box-shadow: 0 2px 4px rgba(0,0,0,0.1); }
        .shadow { box-shadow: 0 4px 8px rgba(0,0,0,0.15); }
        .shadow-lg { box-shadow: 0 8px 16px rgba(0,0,0,0.2); }
        
        .rounded { border-radius: 4px; }
        .rounded-lg { border-radius: 8px; }
        .rounded-circle { border-radius: 50%; }
        
        .position-relative { position: relative; }
        .position-absolute { position: absolute; }
        .position-fixed { position: fixed; }
        .position-sticky { position: sticky; }
        
        /* ===== Header 样式 ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: #fff;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            transition: all 0.3s ease;
        }

        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 70px;
        }

        .logo {
            height: 50px;
            display: flex;
            align-items: center;
        }

        .logo img {
            height: 100%;
            width: auto;
        }

        .logo span {
            font-size: 24px;
            font-weight: bold;
            color: #2c3e50;
            margin-left: 10px;
        }

        /* 导航菜单 */
        .navigation {
            display: flex;
            gap: 30px;
        }

        @media (max-width: 992px) {
            .navigation {
                display: none;
            }
        }

        .nav-item {
            position: relative;
        }

        .nav-link {
            padding: 10px 15px;
            font-weight: 500;
            color: #333;
            display: flex;
            align-items: center;
            gap: 5px;
        }

        .nav-link:hover {
            color: #e74c3c;
        }

        .nav-link i {
            font-size: 12px;
        }

        .submenu {
            position: absolute;
            top: 100%;
            left: 0;
            background: #fff;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            border-radius: 4px;
            opacity: 0;
            visibility: hidden;
            transform: translateY(10px);
            transition: all 0.3s;
            min-width: 200px;
            z-index: 1001;
        }

        .nav-item:hover .submenu {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .submenu li a {
            display: block;
            padding: 12px 20px;
            color: #333;
            border-bottom: 1px solid #eee;
        }

        .submenu li:last-child a {
            border-bottom: none;
        }

        .submenu li a:hover {
            background: #f8f9fa;
            color: #e74c3c;
        }

        /* 认证按钮 */
        .auth-buttons {
            display: flex;
            gap: 15px;
            align-items: center;
        }

        .login-btn,
        .register-btn {
            padding: 8px 20px;
            border-radius: 4px;
            font-weight: 500;
            transition: all 0.3s;
        }

        .login-btn {
            border: 1px solid #3498db;
            color: #3498db;
        }

        .login-btn:hover {
            background: #3498db;
            color: #fff;
        }

        .register-btn {
            background: #e74c3c;
            color: #fff;
            border: 1px solid #e74c3c;
        }

        .register-btn:hover {
            background: #c0392b;
            border-color: #c0392b;
        }

        /* 语言切换 */
        .language-switcher {
            position: relative;
            margin-left: 20px;
        }

        .language-btn {
            display: flex;
            align-items: center;
            gap: 5px;
            padding: 8px 15px;
            background: #f8f9fa;
            border-radius: 4px;
            cursor: pointer;
        }

        .language-btn:hover {
            background: #e9ecef;
        }

        .language-menu {
            position: absolute;
            top: 100%;
            right: 0;
            background: #fff;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            border-radius: 4px;
            opacity: 0;
            visibility: hidden;
            transform: translateY(10px);
            transition: all 0.3s;
            min-width: 120px;
            z-index: 1001;
        }

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

        .language-menu a {
            display: block;
            padding: 10px 15px;
            color: #333;
        }

        .language-menu a:hover {
            background: #f8f9fa;
            color: #e74c3c;
        }

        /* 移动端菜单按钮 */
        .mobile-menu-btn {
            display: none;
            font-size: 24px;
            color: #333;
            cursor: pointer;
            padding: 10px;
        }

        @media (max-width: 992px) {
            .mobile-menu-btn {
                display: block;
            }
        }

        /* ===== 页面横幅 ===== */
        .page-banner {
            background: linear-gradient(169deg, #d7b403 0%, #ff7e7ed1 100%);
            color: #fff;
            padding: 120px 0 80px;
            text-align: center;
        }

        .banner-title {
            font-size: 48px;
            font-weight: bold;
            margin-bottom: 20px;
            opacity: 0;
            animation: fadeInUp 1s forwards;
        }

        .banner-subtitle {
            font-size: 20px;
            opacity: 0.9;
            max-width: 800px;
            margin: 0 auto;
            opacity: 0;
            animation: fadeInUp 1s 0.3s forwards;
        }

        /* ===== 主要内容区域 ===== */

        .content-wrapper {
            display: flex;
            gap: 40px;
        }

        @media (max-width: 768px) {
            .content-wrapper {
                flex-direction: column;
            }
        }

        /* 关于公司 */
        .company-info {
            flex: 2;
        }

        .company-stats {
            flex: 1;
            background: #fff;
            padding: 30px;
            border-radius: 8px;
            box-shadow: 0 4px 15px rgba(0,0,0,0.1);
        }

        .section-title {
            font-size: 32px;
            color: #2c3e50;
            margin-bottom: 30px;
            position: relative;
            padding-bottom: 15px;
        }

        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 60px;
            height: 3px;
            background: #e74c3c;
        }

        .company-description {
            font-size: 16px;
            line-height: 1.8;
            color: #555;
            margin-bottom: 20px;
        }

        /* 统计数据 */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        @media (max-width: 480px) {
            .stats-grid {
                grid-template-columns: 1fr;
            }
        }

        .stat-item {
            text-align: center;
            padding: 20px;
            background: #f8f9fa;
            border-radius: 8px;
            transition: transform 0.3s;
        }

        .stat-item:hover {
            transform: translateY(-5px);
        }

        .stat-number {
            font-size: 36px;
            font-weight: bold;
            color: #e74c3c;
            margin-bottom: 10px;
        }

        .stat-label {
            font-size: 14px;
            color: #7f8c8d;
        }

        /* ===== 品牌理念 ===== */
        .brand-concept {
            background: #f8f9fa;
            padding: 80px 0;
        }

        .concept-list {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        @media (max-width: 992px) {
            .concept-list {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .concept-list {
                grid-template-columns: 1fr;
            }
        }

        .concept-item {
            background: #fff;
            padding: 30px;
            border-radius: 8px;
            box-shadow: 0 4px 15px rgba(0,0,0,0.1);
            transition: all 0.3s;
        }

        .concept-item:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 25px rgba(0,0,0,0.15);
        }

        .concept-title {
            font-size: 20px;
            color: #2c3e50;
            margin-bottom: 15px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .concept-title i {
            color: #e74c3c;
        }

        .concept-content {
            color: #555;
            line-height: 1.6;
        }

        /* ===== 公司资质 ===== */
        .qualifications {
            padding: 80px 0;
        }

        .qualification-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 40px;
        }

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

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

        .certificate-image {
            width: 100%;
            max-width: 300px;
            margin: 0 auto 20px;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 4px 15px rgba(0,0,0,0.1);
            cursor: pointer;
            transition: transform 0.3s;
        }

        .certificate-image:hover {
            transform: scale(1.05);
        }

        .certificate-image img {
            width: 100%;
            height: auto;
        }

        .certificate-title {
            font-size: 18px;
            color: #2c3e50;
            margin-bottom: 10px;
        }

        .certificate-desc {
            color: #7f8c8d;
            margin-bottom: 15px;
        }

        .certificate-link {
            color: #3498db;
            font-weight: 500;
        }

        .certificate-link:hover {
            color: #2980b9;
            text-decoration: underline;
        }

        /* ===== 公司优势滑块 ===== */
        .advantages-section {
            background: #2c3e50;
            color: #fff;
            padding: 80px 0;
        }
        
        .advantages-section .section-title {
            color: #fff;
            text-align: center;
        }
        
        .advantages-section .section-title::after {
            left: 50%;
            transform: translateX(-50%);
        }
        
        .about-slider-container {
            position: relative;
            overflow: hidden;
            padding: 20px 0;
        }
        
        .about-slider-wrapper {
            display: flex;
            transition: transform 0.5s ease;
        }
        
        .about-card {
            flex: 0 0 calc(33.333% - 20px);
            margin: 0 10px;
            background: rgba(255,255,255,0.1);
            backdrop-filter: blur(10px);
            border-radius: 12px;
            padding: 40px 30px;
            transition: all 0.3s;
            position: relative;
            overflow: hidden;
        }
        
        @media (max-width: 992px) {
            .about-card {
                flex: 0 0 calc(50% - 20px);
            }
        }
        
        @media (max-width: 768px) {
            .about-card {
                flex: 0 0 calc(100% - 20px);
            }
        }
        
        .about-card:hover {
            background: rgba(255,255,255,0.15);
            transform: translateY(-10px);
        }
        
        .about-card-no {
            position: absolute;
            top: 20px;
            right: 20px;
            font-size: 60px;
            font-weight: bold;
            color: rgba(255,255,255,0.1);
        }
        
        .about-card-title {
            font-size: 16px;
            margin-bottom: 10px;
            color: rgba(255, 255, 255, 0.5);
            font-weight: 300;
            letter-spacing: 1px;
            text-transform: uppercase;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            padding-bottom: 5px;
            display: inline-block;
        }
        
        .about-card-text {
            color: #fff;
            line-height: 1.9;
            font-size: 16px;
            font-weight: 400;
            margin-top: 5px;
            position: relative;
            z-index: 1;
        }
        
        .about-card::before {
            content: '';
            position: absolute;
            top: 60px;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(
                to bottom,
                rgba(255, 255, 255, 0.05) 0%,
                rgba(255, 255, 255, 0.02) 100%
            );
            z-index: 0;
            opacity: 0;
            transition: opacity 0.3s;
        }
        
        .about-card:hover::before {
            opacity: 1;
        }
        
        .about-slider-controls {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 20px;
            margin-top: 40px;
        }
        
        .about-slider-btn {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255,255,255,0.1);
            border: none;
            color: #fff;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.3s;
        }
        
        .about-slider-btn:hover {
            background: rgba(255,255,255,0.2);
            transform: scale(1.1);
        }
        
        .about-slider-pagination {
            display: flex;
            gap: 10px;
        }
        
        .about-pagination-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: rgba(255,255,255,0.3);
            cursor: pointer;
            transition: all 0.3s;
        }
        
        .about-pagination-dot.active {
            background: #fff;
            transform: scale(1.2);
        }


        /* ===== Footer 样式 ===== */
        .footer {
            background: #2c3e50;
            color: #fff;
            padding: 60px 0 20px;
        }

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

        @media (max-width: 992px) {
            .footer-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }

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

        @media (max-width: 480px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }

        .footer-logo {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .footer-logo img {
            height: 40px;
            width: auto;
        }

        .footer-logo p {
            color: rgba(255,255,255,0.7);
            font-size: 14px;
        }

        .footer-column h3 {
            font-size: 18px;
            margin-bottom: 20px;
            color: #fff;
        }

        .footer-links li {
            margin-bottom: 12px;
        }

        .footer-links a {
            color: rgba(255,255,255,0.7);
            font-size: 14px;
        }

        .footer-links a:hover {
            color: #fff;
            padding-left: 5px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 20px;
            text-align: center;
            color: rgba(255,255,255,0.7);
            font-size: 14px;
        }

        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            justify-content: center;
            margin-top: 15px;
        }

        .friend-links a {
            color: rgba(255,255,255,0.7);
        }

        .friend-links a:hover {
            color: #fff;
        }

        /* ===== 浮动工具条 ===== */
        .floating-tools {
            position: fixed;
            right: 20px;
            bottom: 100px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 15px;
            align-items: center;
        }

        @media (max-width: 768px) {
            .floating-tools {
                right: 10px;
                bottom: 80px;
            }
        }

        .floating-item {
            position: relative;
            width: 60px;
            height: 60px;
            background: #fff;
            border-radius: 50%;
            box-shadow: 0 4px 15px rgba(0,0,0,0.15);
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.3s;
        }

        @media (max-width: 768px) {
            .floating-item {
                width: 50px;
                height: 50px;
            }
        }

        .floating-item:hover {
            transform: scale(1.1);
            box-shadow: 0 6px 20px rgba(0,0,0,0.2);
        }

        .floating-item i {
            font-size: 24px;
            color: #2c3e50;
        }

        @media (max-width: 768px) {
            .floating-item i {
                font-size: 20px;
            }
        }

        .floating-item span {
            font-size: 12px;
            color: #666;
            margin-top: 2px;
        }

        .notification-badge {
            position: absolute;
            top: -5px;
            right: -5px;
            background: #e74c3c;
            color: #fff;
            font-size: 12px;
            min-width: 20px;
            height: 20px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            animation: pulse 2s infinite;
        }

        .chat-bubble {
            position: absolute;
            right: 70px;
            top: 50%;
            transform: translateY(-50%);
            background: #fff;
            padding: 12px 18px;
            border-radius: 10px;
            box-shadow: 0 4px 15px rgba(0,0,0,0.15);
            max-width: 200px;
            font-size: 14px;
            line-height: 1.4;
            opacity: 0;
            transition: opacity 0.3s;
            z-index: -1;
        }

        .chat-bubble::after {
            content: '';
            position: absolute;
            right: -8px;
            top: 50%;
            transform: translateY(-50%);
            border-width: 8px 0 8px 8px;
            border-style: solid;
            border-color: transparent transparent transparent #fff;
        }

        .floating-item:hover .chat-bubble {
            opacity: 1;
            z-index: 1;
        }

        .back-to-top {
            background: #2c3e50;
            color: #fff;
        }

        .back-to-top:hover {
            background: #34495e;
        }

        .back-to-top i {
            color: #fff;
        }

        /* ===== 模态框 ===== */
        .modal-overlay {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0,0,0,0.5);
            z-index: 2000;
            display: none;
            align-items: center;
            justify-content: center;
            opacity: 0;
            transition: opacity 0.3s;
        }

        .modal-overlay.active {
            display: flex;
            opacity: 1;
        }

        .modal-container {
            background: #fff;
            border-radius: 12px;
            max-width: 800px;
            width: 90%;
            max-height: 80vh;
            overflow: hidden;
            transform: translateY(20px);
            transition: transform 0.3s;
        }

        .modal-overlay.active .modal-container {
            transform: translateY(0);
        }

        .modal-header {
            padding: 20px 30px;
            background: #2c3e50;
            color: #fff;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .modal-title {
            font-size: 20px;
            font-weight: 500;
        }

        .modal-close {
            background: none;
            border: none;
            color: #fff;
            font-size: 24px;
            cursor: pointer;
            width: 30px;
            height: 30px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            transition: background 0.3s;
        }

        .modal-close:hover {
            background: rgba(255,255,255,0.1);
        }

        .modal-body {
            padding: 30px;
            max-height: calc(80vh - 70px);
            overflow-y: auto;
        }

        .modal-content {
            font-size: 14px;
            line-height: 1.6;
            color: #555;
        }

        .modal-content h3 {
            color: #2c3e50;
            margin: 20px 0 10px;
            font-size: 16px;
        }

        .modal-content p {
            margin-bottom: 15px;
        }

        .modal-content ul {
            padding-left: 20px;
            margin-bottom: 15px;
        }

        .modal-content li {
            margin-bottom: 8px;
        }

        /* ===== 移动端菜单 ===== */
        .mobile-menu {
            position: fixed;
            top: 0;
            left: -300px;
            width: 280px;
            height: 100vh;
            background: #fff;
            z-index: 2001;
            box-shadow: 5px 0 15px rgba(0,0,0,0.1);
            transition: left 0.3s;
            padding: 20px;
            overflow-y: auto;
        }

        .mobile-menu.active {
            left: 0;
        }

        .mobile-menu-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 30px;
            padding-bottom: 20px;
            border-bottom: 1px solid #eee;
        }

        .mobile-close {
            font-size: 24px;
            color: #333;
            cursor: pointer;
            background: none;
            border: none;
        }

        .mobile-nav {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .mobile-nav-item {
            position: relative;
        }

        .mobile-nav-link {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 12px 0;
            color: #333;
            border-bottom: 1px solid #eee;
            cursor: pointer;
        }

        .mobile-nav-link i {
            transition: transform 0.3s;
        }

        .mobile-nav-link.active i {
            transform: rotate(180deg);
        }

        .mobile-submenu {
            display: none;
            padding-left: 20px;
            margin: 10px 0;
        }

        .mobile-submenu.active {
            display: block;
        }

        .mobile-submenu li {
            margin-bottom: 8px;
        }

        .mobile-submenu a {
            display: block;
            padding: 8px 0;
            color: #666;
        }

        .mobile-submenu a:hover {
            color: #e74c3c;
        }

        /* ===== 动画 ===== */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @keyframes pulse {
            0% {
                box-shadow: 0 0 0 0 rgba(231, 76, 60, 0.7);
            }
            70% {
                box-shadow: 0 0 0 10px rgba(231, 76, 60, 0);
            }
            100% {
                box-shadow: 0 0 0 0 rgba(231, 76, 60, 0);
            }
        }

        @keyframes slideInRight {
            from {
                opacity: 0;
                transform: translateX(30px);
            }
            to {
                opacity: 1;
                transform: translateX(0);
            }
        }

        /* ===== 面包屑导航 ===== */
        .breadcrumb {
            padding: 20px 0;
            background: #f8f9fa;
            margin-top: 70px;
        }

        .breadcrumb-list {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
        }

        .breadcrumb-item {
            color: #666;
        }

        .breadcrumb-item:last-child {
            color: #2c3e50;
            font-weight: 500;
        }

        .breadcrumb-separator {
            color: #999;
        }

        /* ===== 页面导航 ===== */
        .page-navigation {
            background: #f8f9fa;
            padding: 20px 0;
            position: sticky;
            top: 70px;
            z-index: 999;
            box-shadow: 0 2px 5px rgba(0,0,0,0.05);
        }

        .nav-tabs {
            display: flex;
            gap: 30px;
            overflow-x: auto;
            padding: 10px 0;
        }

        @media (max-width: 768px) {
            .nav-tabs {
                gap: 20px;
            }
        }

        .nav-tab {
            white-space: nowrap;
            padding: 10px 0;
            color: #666;
            font-weight: 500;
            position: relative;
        }

        .nav-tab.active {
            color: #e74c3c;
        }

        .nav-tab.active::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 0;
            width: 100%;
            height: 3px;
            background: #e74c3c;
        }

        .nav-tab:hover {
            color: #e74c3c;
        }