* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Microsoft YaHei', Arial, sans-serif;
        }
        
        body {
        padding-top: 60px;  /* 与导航栏高度相同 */
        background-color: #f5f5f5;
        color: #333;
        line-height: 1.6;
    }
        
        .top-navbar {
        background-color: #1a5276;
        color: white;
        padding: 0 5%;
        height: 0px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        box-shadow: 0 2px 10px rgba(0,0,0,0.2);
        position: fixed;  /* 修改为固定定位 */
        top: 0;           /* 固定在顶部 */
        left: 0;          /* 左侧对齐 */
        right: 0;         /* 右侧对齐 */
        z-index: 1000;    /* 确保在最上层 */
    }
        
        .logo {
            font-size: 24px;
            font-weight: bold;
            color: white;
            text-decoration: none;
        }
        
        .nav-menu {
            display: flex;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        
        .nav-item {
            position: relative;
            margin-left: 50px;
        }
        
        .nav-link {
            color: white;
            text-decoration: none;
            font-size: 16px;
            padding: 20px 0;
            display: flex;
            align-items: center;
            transition: color 0.3s;
        }
        
        .nav-link:hover {
            color: #f9e79f;
        }
        
        .dropdown-toggle::after {
            content: "▼";
            font-size: 10px;
            margin-left: 5px;
        }
        
        .dropdown-menu {
            position: absolute;
            top: 100%;
            left: 0;
            background-color: white;
            min-width: 200px;
            box-shadow: 0 8px 16px rgba(0,0,0,0.1);
            border-radius: 0 0 4px 4px;
            display: none;
            z-index: 1000;
            list-style: none;
            padding-left: 0;
        }
        
        .dropdown-item {
            display: block;
            padding: 12px 20px;
            color: #333;
            text-decoration: none;
            border-bottom: 1px solid #eee;
            transition: all 0.3s;
        }
        
        .dropdown-item:hover {
            background-color: #f5f5f5;
            color: #1a5276;
        }
        
        .nav-item:hover .dropdown-menu {
            display: block;
        }
        
        .auth-buttons {
            display: flex;
            align-items: center;
        }
        
        .btn {
            padding: 8px 20px;
            border-radius: 4px;
            font-size: 14px;
            cursor: pointer;
            transition: all 0.3s;
            text-decoration: none;
        }
        
        .btn-register {
            background-color: #f39c12;
            color: white;
            margin-right: 15px;
        }
        
        .btn-register:hover {
            background-color: #e67e22;
        }
        
        .btn-login {
            border: 1px solid white;
            color: white;
        }
        
        .btn-login:hover {
            background-color: rgba(255,255,255,0.1);
        }
        
        /* 响应式设计 */
        .mobile-menu-btn {
            display: none;
            font-size: 24px;
            cursor: pointer;
        }
        
        @media (max-width: 992px) {
            .nav-menu {
                display: none;
                position: absolute;
                top: 60px;
                left: 0;
                right: 0;
                background-color: #1a5276;
                flex-direction: column;
                padding: 20px 5%;
            }
            
            .nav-item {
                margin: 0;
                padding: 10px 0;
            }
            
            .dropdown-menu {
                position: static;
                box-shadow: none;
                border-radius: 0;
                display: none;
                background-color: #2874a6;
                padding-left: 20px;
            }
            
            .dropdown-item {
                color: white;
                border-bottom: 1px solid rgba(255,255,255,0.1);
            }
            
            .dropdown-item:hover {
                background-color: rgba(255,255,255,0.1);
                color: white;
            }
            
            .mobile-menu-btn {
                display: block;
            }
            
            .nav-show {
                display: flex;
            }
        }
        
        /* 新增内容样式 */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
        }
        
        .hero-section {
            background: linear-gradient(rgba(0,0,0,0.7), rgba(0,0,0,0.7)), url('https://example.com/mining-bg.jpg');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 100px 0;
            text-align: center;
        }
        
        .hero-title {
            font-size: 48px;
            margin-bottom: 20px;
        }
        
        .hero-subtitle {
            font-size: 20px;
            margin-bottom: 30px;
        }
        
        .search-box {
            max-width: 800px;
            margin: 0 auto;
            background: white;
            padding: 20px;
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        
        .search-input {
            width: 70%;
            padding: 12px;
            border: 1px solid #ddd;
            border-radius: 4px;
            font-size: 16px;
        }
        
        .search-btn {
            padding: 12px 24px;
            background-color: #f39c12;
            color: white;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            font-size: 16px;
            margin-left: 10px;
        }
        
        .features {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            margin: 5px 0;
        }
        
        .feature-card {
            width: 24%;
            background: white;
            padding: 30px;
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            margin-bottom: 20px;
            text-align: center;
            transition: transform 0.3s;
        }
        
        .feature-card:hover {
            transform: translateY(-10px);
        }
        
        .feature-icon {
            font-size: 48px;
            color: #1a5276;
            margin-bottom: 20px;
        }
        
        .feature-title {
            font-size: 20px;
            margin-bottom: 15px;
            color: #1a5276;
        }
        
        .data-platform {
            background-color: #f9f9f9;
            padding: 60px 0;
        }
        
        .section-title {
            text-align: center;
            font-size: 32px;
            margin-bottom: 40px;
            color: #1a5276;
        }
        
        .data-cards {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
        }
        
        .data-card {
            width: 48%;
            background: white;
            padding: 25px;
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            margin-bottom: 25px;
            display: flex;
            align-items: center;
        }
        
        .data-icon {
            font-size: 40px;
            color: #f39c12;
            margin-right: 20px;
        }
        
        .data-content {
            flex: 1;
        }
        
        .data-title {
            font-size: 18px;
            margin-bottom: 10px;
            color: #1a5276;
        }
        
        .ai-section {
            padding: 60px 0;
            background-color: #1a5276;
            color: white;
        }
        
        .ai-container {
            display: flex;
            align-items: center;
        }
        
        .ai-image {
            width: 50%;
            padding-right: 40px;
        }
        
        .ai-image img {
            width: 100%;
            border-radius: 8px;
        }
        
        .ai-content {
            width: 50%;
        }
        
        .ai-title {
            font-size: 32px;
            margin-bottom: 20px;
        }
        
        .ai-list {
            list-style: none;
            margin-bottom: 30px;
        }
        
        .ai-list li {
            margin-bottom: 15px;
            position: relative;
            padding-left: 30px;
        }
        
        .ai-list li:before {
            content: "✓";
            position: absolute;
            left: 0;
            color: #f39c12;
            font-weight: bold;
        }
        
        .news-section {
            padding: 60px 0;
        }
        
        .news-cards {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
        }
        
        .news-card {
            width: 31%;
            background: white;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            margin-bottom: 30px;
        }
        
        .news-image {
            height: 200px;
            overflow: hidden;
        }
        
        .news-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s;
        }
        
        .news-card:hover .news-image img {
            transform: scale(1.1);
        }
        
        .news-content {
            padding: 20px;
        }
        
        .news-date {
            color: #f39c12;
            font-size: 14px;
            margin-bottom: 10px;
        }
        
        .news-title {
            font-size: 18px;
            margin-bottom: 10px;
            color: #1a5276;
        }
        
        .news-excerpt {
            color: #666;
            margin-bottom: 15px;
        }
        
        .read-more {
            color: #f39c12;
            text-decoration: none;
            font-weight: bold;
        }
        
        .partners {
            background-color: #FFFFFF;
            padding: 60px 0;
            text-align: center;
        }
        
    /* 修改合作伙伴logo样式 - 统一尺寸和自适应 */
    .partner-logos {
        display: flex;
        justify-content: center;
        flex-wrap: wrap;
        margin-top: 40px;
        gap: 20px; /* 增加间距 */
    }
    
    .partner-logo {
        width: 160px; /* 固定宽度 */
        height: 100px; /* 固定高度 */
        display: flex;
        align-items: center;
        justify-content: center;
        opacity: 0.8;
        transition: all 0.3s;
        padding: 15px;
        background: white;
        border-radius: 8px;
        box-shadow: 0 3px 10px rgba(0,0,0,0.1);
        overflow: hidden; /* 防止图片溢出 */
    }
    
    .partner-logo:hover {
        opacity: 1;
        transform: translateY(-5px);
        box-shadow: 0 8px 20px rgba(0,0,0,0.15);
    }
    
    .partner-logo img {
        max-width: 90%; /* 图片最大宽度为容器的90% */
        max-height: 90%; /* 图片最大高度为容器的90% */
        object-fit: contain; /* 保持比例完整显示 */
        width: auto; /* 宽度自动 */
        height: auto; /* 高度自动 */
    }
        .footer {
            background-color: #1a5276;
            color: white;
            padding: 60px 0 20px;
        }
        
        .footer-container {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        .footer-column {
            width: 23%;
            margin-bottom: 30px;
        }
        
        .footer-title {
            font-size: 18px;
            margin-bottom: 20px;
            color: #f9e79f;
        }
        
        .footer-links {
            list-style: none;
        }
        
        .footer-links li {
            margin-bottom: 10px;
        }
        
        .footer-links a {
            color: white;
            text-decoration: none;
            transition: color 0.3s;
        }
        
        .footer-links a:hover {
            color: #f9e79f;
        }
        
        .footer-bottom {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid rgba(255,255,255,0.1);
            margin-top: 30px;
        }
        
        .contact-info {
            margin-top: 20px;
        }
        
        .contact-info p {
            margin-bottom: 10px;
            display: flex;
            align-items: center;
        }
        
        .contact-info i {
            margin-right: 10px;
            color: #f39c12;
        }
        
        .social-links {
            display: flex;
            margin-top: 20px;
        }
        
        .social-link {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background-color: rgba(255,255,255,0.1);
            border-radius: 50%;
            margin-right: 10px;
            color: white;
            text-decoration: none;
            transition: all 0.3s;
        }
        
        .social-link:hover {
            background-color: #f39c12;
            transform: translateY(-3px);
        }
        
        /* 响应式调整 */
        @media (max-width: 768px) {
            .hero-title {
                font-size: 36px;
            }
            
            .hero-subtitle {
                font-size: 16px;
            }
            
            .search-input {
                width: 100%;
                margin-bottom: 10px;
            }
            
            .search-btn {
                width: 100%;
                margin-left: 0;
            }
            
            .feature-card {
                width: 100%;
            }
            
            .data-card {
                width: 100%;
            }
            
            .ai-container {
                flex-direction: column;
            }
            
            .ai-image, .ai-content {
                width: 100%;
            }
            
            .ai-image {
                padding-right: 0;
                margin-bottom: 30px;
            }
            
            .news-card {
                width: 100%;
            }
            
            .footer-column {
                width: 48%;
            }
        }
        
        @media (max-width: 480px) {
            .footer-column {
                width: 100%;
            }
        }
  
    /* 添加返回顶部按钮样式 */
    .back-to-top {
        position: fixed;
        bottom: 30px;
        right: 30px;
        width: 50px;
        height: 50px;
        background-color: #9dc24e;
        color: white;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 20px;
        cursor: pointer;
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s;
        z-index: 999;
        box-shadow: 0 2px 10px rgba(0,0,0,0.2);
    }
    
    .back-to-top:hover {
        background-color: #f39c12;
        transform: translateY(-3px);
    }
    
    .back-to-top.active {
        opacity: 1;
        visibility: visible;
    }
    /* 平台标题样式 */
    .platform-title {
        text-align: center;
        margin: 40px 0;
    }
    .platform-title h2 {
        font-size: 36px;
        color: #1a5276;
        margin-bottom: 20px;
    }
    .platform-title p {
        font-size: 18px;
        color: #666;
        max-width: 800px;
        margin: 0 auto;
    }


    /* 漂浮通知样式 - 调整后 */
    .floating-notification {
        position: fixed;
        bottom: 30px;
        right: 30px;
        background-color: #1a5276;
        color: white;
        padding: 15px 25px;
        border-radius: 8px;
        box-shadow: 0 5px 15px rgba(0,0,0,0.2);
        z-index: 999;
        max-width: 300px;
        display: flex;
        align-items: center;
        animation: float-gently 3s ease-in-out infinite;
    }
    
    @keyframes float-gently {
        0%, 100% { transform: translateY(0); }
        50% { transform: translateY(-10px); }
    }
    
    .notification-content {
        position: relative;
    }
    
    .close-notification {
        position: absolute;
        top: -10px;
        right: -10px;
        cursor: pointer;
        background: white;
        color: #1a5276;
        width: 20px;
        height: 20px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 14px;
        box-shadow: 0 2px 5px rgba(0,0,0,0.2);
    }
    
    .floating-notification img {
        width: 80px;
        height: 80px;
        margin-left: 15px;
        border: 2px solid white;
        border-radius: 8px;
    }
    
    /* 微信弹窗样式 */
    .wechat-popup {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background-color: rgba(0,0,0,0.7);
        display: flex;
        align-items: center;
        justify-content: center;
        z-index: 1001;
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s;
    }
    .wechat-popup.show {
        opacity: 1;
        visibility: visible;
    }
    .wechat-popup-content {
        background-color: white;
        padding: 30px;
        border-radius: 8px;
        text-align: center;
        max-width: 300px;
        position: relative;
    }
    .wechat-popup-close {
        position: absolute;
        top: 10px;
        right: 10px;
        font-size: 20px;
        cursor: pointer;
        color: #666;
    }
    .wechat-popup img {
        max-width: 100%;
        margin-bottom: 15px;
    }

    /* 浮动窗口格式 */
    .floating-notification {
        position:fixed ;
        bottom: 20px;
        left: 20px;
        background-color: #f39c12;
        color: white;
        padding: 15px;
        border-radius: 8px;
        box-shadow: 0 5px 15px rgba(0,0,0,0.2);
        z-index: 1000;
        max-width: 300px;
        display: none;
    }
    
    .notification-content {
        position: relative;
    }
    
    .close-notification {
        position: absolute;
        top: -10px;
        right: -10px;
        cursor: pointer;
        background: white;
        color: #1a5276;
        width: 20px;
        height: 20px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 14px;
    }