@import url('https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css');
    @import url('https://unpkg.com/swiper/swiper-bundle.min.css');
        @import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500;700&display=swap');
        /* 自定义样式 */
        .gradient-text {
            background: linear-gradient(90deg, #5B21B6, #8B5CF6);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        
        .nav-link {
            position: relative;
        }
        
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 0;
            height: 2px;
            background-color: #7C3AED;
            transition: width 0.3s ease;
        }
        
        .nav-link:hover::after,
        .nav-link.active::after {
            width: 100%;
        }
        
        .case-tab {
            position: relative;
        }
        
        .case-tab::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 2px;
            background-color: #7C3AED;
            transition: width 0.3s ease;
        }
        
        .case-tab.active::after {
            width: 80%;
        }
        
        .ai-assistant-btn {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 1000;
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: linear-gradient(135deg, #5B21B6, #8B5CF6);
            box-shadow: 0 10px 25px rgba(91, 33, 182, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.3s ease;
        }
        
        .ai-assistant-btn:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 30px rgba(91, 33, 182, 0.4);
        }
        
        .ai-chat-container {
            position: fixed;
            bottom: 100px;
            right: 30px;
            z-index: 999;
            width: 360px;
            height: 500px;
            background: white;
            border-radius: 15px;
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
            display: none;
            flex-direction: column;
            overflow: hidden;
        }
        
        .ai-chat-header {
            background: linear-gradient(135deg, #5B21B6, #8B5CF6);
            color: white;
            padding: 15px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        
        .ai-chat-body {
            flex: 1;
            padding: 20px;
            overflow-y: auto;
        }
        
        .ai-chat-footer {
            padding: 15px 20px;
            border-top: 1px solid #e5e7eb;
            display: flex;
            align-items: center;
        }
        
        .ai-chat-input {
            flex: 1;
            border: 1px solid #d1d5db;
            border-radius: 20px;
            padding: 10px 15px;
            outline: none;
            transition: border-color 0.3s ease;
        }
        
        .ai-chat-input:focus {
            border-color: #8B5CF6;
        }
        
        .ai-chat-send {
            margin-left: 10px;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, #5B21B6, #8B5CF6);
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.3s ease;
        }
        
        .ai-chat-send:hover {
            transform: scale(1.05);
        }
        
        .message {
            margin-bottom: 15px;
            display: flex;
            flex-direction: column;
        }
        
        .message-content {
            max-width: 80%;
            padding: 10px 15px;
            border-radius: 15px;
            margin-bottom: 5px;
        }
        
        .message.user .message-content {
            background-color: #e5e7eb;
            align-self: flex-end;
            border-bottom-right-radius: 5px;
        }
        
        .message.ai .message-content {
            background-color: #f3e8ff;
            align-self: flex-start;
            border-bottom-left-radius: 5px;
        }
        
        .message-time {
            font-size: 0.75rem;
            color: #9ca3af;
            align-self: flex-end;
        }