/* 基础样式 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Helvetica Neue', Arial, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f9f9f9;
        }

     /* 导航栏和登录状态区 */
        .header {
            background-color: #fff;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
            position: sticky;
            top: 0;
            z-index: 100;
        }

        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 0 5%;
            max-width: 1400px;
            margin: 0 auto;
        }

        .logo {
            font-size: 1.5rem;
            font-weight: bold;
            color: #6c9bcf;
            margin-right: 30px;
        }

        .nav-list {
            display: flex;
            list-style: none;
            flex-grow: 1;
            justify-content: flex-start;
        }

        .nav-link {
            display: block;
            padding: 20px 15px;
            text-decoration: none;
            color: #555;
            transition: all 0.3s;
        }

        .nav-link:hover,
        .nav-link.active {
            color: #6c9bcf;
            background-color: rgba(108, 155, 207, 0.1);
        }

        .user-status {
            display: flex;
            align-items: center;
            gap: 15px;
            margin-left: auto;
        }

        .user-info {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .user-avatar {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            object-fit: cover;
            border: 2px solid #eaeaea;
        }

        .user-name {
            font-size: 14px;
            color: #555;
        }

        .login-btn {
            background-color: #6c9bcf;
            color: white;
            border: none;
            padding: 8px 16px;
            border-radius: 4px;
            cursor: pointer;
            transition: background-color 0.3s;
            font-size: 14px;
        }

        .login-btn:hover {
            background-color: #5a8ac0;
        }

        /* 主页Banner - 修改部分 */
        .banner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 80px 5%;
            /* 添加背景图片 */
            background-image: url('img/baner1.jpg'); /* 替换为你的图片路径 */;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            position: relative;
            flex-wrap: wrap;
            /* 添加半透明遮罩层，确保文字可读性 */
            color: white;
        }

        /* 添加半透明遮罩层 */
        .banner::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.4); /* 半透明黑色遮罩 */
            z-index: 1;
        }

        .banner-content {
            flex: 1;
            min-width: 300px;
            padding-right: 30px;
            position: relative;
            z-index: 2; /* 确保内容在遮罩层上方 */
        }

        .banner-title {
            font-size: 2.5rem;
            margin-bottom: 20px;
            color: white; /* 修改文字颜色为白色，确保在背景上可读 */
        }

        .banner-text {
            font-size: 1.1rem;
            margin-bottom: 25px;
            color: rgba(255, 255, 255, 0.9); /* 修改文字颜色为半透明白色 */
            line-height: 1.8;
        }

        .banner-btn {
            background-color: #6c9bcf;
            color: white;
            border: none;
            padding: 12px 24px;
            border-radius: 4px;
            font-size: 1rem;
            cursor: pointer;
            transition: background-color 0.3s;
        }

        .banner-btn:hover {
            background-color: #5a8ac0;
        }

        .banner-image {
            flex: 1;
            min-width: 300px;
            position: relative;
            z-index: 2; /* 确保图片在遮罩层上方 */
        }

        .banner-image img {
            width: 100%;
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3); /* 加深阴影，确保在背景上可见 */
        }
        /* 内容块 */
        .content {
            padding: 60px 5%;
            max-width: 1400px;
            margin: 0 auto;
        }

        .section-title {
            text-align: center;
            margin-bottom: 40px;
            color: #444;
            font-size: 2rem;
        }

        /* 特色区域 */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
            margin-bottom: 60px;
        }

        .feature-card {
            background-color: #fff;
            padding: 30px;
            border-radius: 8px;
            text-align: center;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: transform 0.3s;
        }

        .feature-card:hover {
            transform: translateY(-5px);
        }

        .feature-icon {
            font-size: 2.5rem;
            margin-bottom: 15px;
        }

        .feature-card h3 {
            margin-bottom: 15px;
            color: #555;
        }

        .feature-card p {
            color: #777;
            line-height: 1.6;
        }
        .feature-card-link {
             text-decoration: none;
             color: inherit;
             display: block;
        }

        .feature-card-link:hover .feature-card {
        transform: translateY(-7px);
        box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
        }

        /* 关于我们区域 */
        .about-content {
            display: flex;
            align-items: center;
            gap: 40px;
            flex-wrap: wrap;
        }

        .about-text {
            flex: 1;
            min-width: 300px;
        }

        .about-text p {
            margin-bottom: 20px;
            color: #666;
            line-height: 1.8;
        }

        .about-image {
            flex: 1;
            min-width: 300px;
        }

        .about-image img {
            width: 100%;
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }

        /* 页脚 */
        .footer {
            background-color: #fff;
            padding: 50px 5% 20px;
            box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
        }

        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 30px;
            margin-bottom: 30px;
            max-width: 1400px;
            margin: 0 auto 30px;
        }

        .footer-section h3 {
            margin-bottom: 20px;
            color: #555;
        }

        .footer-section ul {
            list-style: none;
        }

        .footer-section li {
            margin-bottom: 10px;
        }

        .footer-section a {
            text-decoration: none;
            color: #777;
            transition: color 0.3s;
        }

        .footer-section a:hover {
            color: #6c9bcf;
        }

        .social-links {
            display: flex;
            gap: 15px;
        }

        .social-link {
            display: inline-block;
            padding: 8px 15px;
            background-color: #f0f0f0;
            border-radius: 4px;
            color: #555;
            transition: all 0.3s;
        }

        .social-link:hover {
            background-color: #6c9bcf;
            color: white;
        }

        .footer-bottom {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #eee;
            color: #777;
            max-width: 1400px;
            margin: 0 auto;
        }

        /* 响应式设计 */
        @media (max-width: 768px) {
            .banner {
                flex-direction: column;
                text-align: center;
            }
            
            .banner-content {
                padding-right: 0;
                margin-bottom: 30px;
            }
            
            .nav-container {
                flex-direction: column;
                padding: 15px 5%;
            }
            
            .nav-list {
                margin: 15px 0;
                flex-wrap: wrap;
                justify-content: center;
            }
            
            .user-status {
                margin-top: 10px;
            }
            
            .about-content {
                flex-direction: column;
            }
        }