html, body {
            height: 100%;
        }
        body {
        font-family: "Helvetica Neue", sans-serif;
        text-align: center;
        background-color: #ffffff;
        margin: 0;
        padding: 0px 0px;
        display: flex;
        flex-direction: column;
        height: 100%;
        }
        .nav-header {
        background-color: white;       /* ✅ 纯白背景 */
        padding: 0px 0px 5px 0px;
        box-shadow: 0 2px 5px rgba(0,0,0,0.1);
        width: 100%;
        margin: 0 auto; 
        max-width: 1000px;                    /* ✅ 让它铺满整个页面宽度 */
        z-index: 1000;
        }
        .nav-container {
            max-width: none;
            margin: 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-left: 15px;
            padding-right: 15px;
        }
        .logo {
            font-size: 1.5em;
            font-weight: bold;
            text-decoration: none;
            background: linear-gradient(90deg, #b23da4, #6262e4);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .nav-buttons {
            display: flex;
            gap: 15px;
            align-items: center;
        }
        .user-stats {
            display: flex;
            flex-direction: column;
            font-size: 14px;
            color: #333;
        }
        .user-dropdown {
            position: relative;
            cursor: pointer;
        }
        .nav-button {
            padding: 0px 0px;
            background-color: transparent;  /* ✅ 无底色 */
            color: #000;                    /* ✅ 黑色文字 */
            border: none;                   /* ✅ 无边框 */
            cursor: pointer;
            text-decoration: none;
            font-size: 14px;
        }
        .nav-button:hover {
            text-decoration: underline;
            background-color: transparent;
        }
        .user-info-display {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 6px 10px;
            border-radius: 6px;
        }
        .lucide-icon {
            width: 24px;
            height: 24px;
            stroke: #333;
        }
        .dropdown-arrow {
            font-size: 12px;
        }
        .dropdown-menu {
            position: absolute;
            top: 40px;
            right: 0;
            background-color: white;
            box-shadow: 0 2px 6px rgba(0,0,0,0.1);
            border-radius: 6px;
            padding: 4px 0;
            width: 140px;
            opacity: 0;
            transform: translateY(-10px);
            transition: opacity 0.2s ease, transform 0.2s ease;
            pointer-events: none;
            z-index: 999;
        }
        .dropdown-menu.show {
            opacity: 1;
            transform: translateY(0);
            pointer-events: auto;
        }
        .dropdown-item {
            padding: 5px 0px;
            font-size: 14px;
            color: #333;
            text-align: center;
            cursor: pointer;
        }

        .dropdown-item:hover {
            background-color: #f5f5f5;
        }
        .container {
            display: flex;
            gap: 3px;
            flex: 1;                 /* 关键 */
            margin-top: 5px;
            margin-bottom: 2px;
            max-width: 1000px;
            width: 100%;
            margin-left: auto;
            margin-right: auto;
            overflow: hidden;        /* 防止溢出 */
        }
        .chat-column {
            flex: 1;
            background-color: white;
            border-radius: 8px;
            box-shadow: 0 1px 3px rgba(0,0,0,0.05); /* 更轻、更细 */
            padding: 2px;
            display: flex;
            flex-direction: column;
            height: auto;        /* 改为自动高度 */
            min-height: 0;       /* 防止子元素溢出 */
        }
        .chat-column.recognition {
            flex: 1.3;                          /* 左侧：1 */
        }
        .chat-column.response {
            flex: 2;                          /* 右侧：1 */
        }
        .column-header {
            font-size: 1em;
            margin-bottom: 2px;
            padding-bottom: 2px;
            border-bottom: 1px solid #eee;
        }
        .recognition-box {
            flex: 1;
            border: 2px solid #4CAF50;
            border-radius: 6px;
            padding: 2px;
            background-color: #f9f9f9;
            overflow-y: auto;
            margin-bottom: 2px;
            text-align: left;
        }
        .recognition-item {
            margin: 5px 0;
            padding: 5px;
            background-color: #deecf8;
            border-radius: 4px;
        }
        .recognition-final {
            margin: 5px 0;
            padding: 5px;
            background-color: #e8f5e9;
            border-radius: 4px;
        }
        .message-box {
            flex: 1;
            border: 2px solid #2196F3;
            border-radius: 6px;
            padding: 2px;
            background-color: #f9f9f9;
            overflow-y: auto;
            margin-bottom: 2px;
            white-space: pre-wrap;
            text-align: left;
        }
        .thinking-item {
            margin: 5px 0;
            padding: 5px;
            background-color: #deecf8;
            border-radius: 4px;
            display: inline-block;
            white-space: nowrap;
        }
        .button-container {
            display: flex;
            align-items: center;
            padding: 2px;
            background-color: white;
            border-radius: 8px;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
            flex-wrap: wrap;

            max-width: 1000px;   /* 限制最大宽度 */
            width: 100%;         /* 自适应宽度 */
            margin-left: auto;   /* 居中 */
            margin-right: auto;
        }
        #recordButton {
            padding: 15px 30px;
            font-size: 1.2em;
            border: none;
            border-radius: 8px;
            cursor: pointer;
            transition: background-color 0.3s, transform 0.1s;
            box-shadow: 0 4px 6px rgba(0,0,0,0.1);
        }
        #connectRemoteButton {
            padding: 10px 20px; /* 缩小按钮大小 */
            font-size: 1em;     /* 缩小字体大小 */
            border: none;
            border-radius: 8px;
            cursor: pointer;
            background-color: #4CAF50;
            color: white;
            box-shadow: 0 4px 6px rgba(0,0,0,0.1);
            transition: background-color 0.3s, transform 0.1s;
            margin-left: 12%;  /* 距离div左边20px */
        }
        .connectRemoteButton:hover {
            background-color: #3fed48;
            transform: scale(1.02);
        }
        #recordButton.start {
            background-color: #4CAF50;
            color: white;
        }
        #recordButton.stop {
            background-color: #f44336;
            color: white;
        }
        #status {
            margin-top: 10px;
            color: #666;
            font-size: 0.9em;
        }
        .thinking {
            color: #666;
            font-style: italic;
        }
        .ai-response {
            margin: 5px 0;
        }
        #timer {
            font-size: 1em;
            color: #333;
            position: absolute;
            left: 50%;
            transform: translate(-20%, -0%);
        }

        #interviewModeSelect { 
            padding: 8px 5px;  /* 适当的内边距 */
            border: 2px solid #4CAF50;  /* 添加绿色实线边框 */
            border-radius: 10px;  /* 增加圆角半径，使四个角更圆润 */
            background-color: white;  /* 确保背景色为白色 */
            font-size: 14px;  /* 设置字体大小 */
            color: #333;  /* 设置文字颜色 */
            cursor: pointer;  /* 设置指针为点击样式 */
            outline: none;  /* 移除默认的焦点轮廓 */
        }
        #interviewModeSelect:hover {
            border-color: #2196F3;  /* 鼠标悬停时改变边框颜色 */
        }
        #interviewModeSelect:focus {
            border-color: #2196F3;  /* 聚焦时改变边框颜色 */
        }

        #reasoningModelSelect { 
            padding: 8px 5px;  /* 适当的内边距 */
            border: 2px solid #4CAF50;  /* 添加绿色实线边框 */
            border-radius: 10px;  /* 增加圆角半径，使四个角更圆润 */
            background-color: white;  /* 确保背景色为白色 */
            font-size: 14px;  /* 设置字体大小 */
            color: #333;  /* 设置文字颜色 */
            cursor: pointer;  /* 设置指针为点击样式 */
            outline: none;  /* 移除默认的焦点轮廓 */
        }
        #reasoningModelSelect:hover {
            border-color: #2196F3;  /* 鼠标悬停时改变边框颜色 */
        }
        #reasoningModelSelect:focus {
            border-color: #2196F3;  /* 聚焦时改变边框颜色 */
        }

        #programLanguageSelect { 
            padding: 8px 5px;  /* 适当的内边距 */
            border: 2px solid #4CAF50;  /* 添加绿色实线边框 */
            border-radius: 10px;  /* 增加圆角半径，使四个角更圆润 */
            background-color: white;  /* 确保背景色为白色 */
            font-size: 14px;  /* 设置字体大小 */
            color: #333;  /* 设置文字颜色 */
            cursor: pointer;  /* 设置指针为点击样式 */
            outline: none;  /* 移除默认的焦点轮廓 */
        }
        #programLanguageSelect:hover {
            border-color: #2196F3;  /* 鼠标悬停时改变边框颜色 */
        }
        #programLanguageSelect:focus {
            border-color: #2196F3;  /* 聚焦时改变边框颜色 */
        }
        
        /*发送按钮样式*/
        .send-button {
            display: none; /* 默认隐藏 */
            padding: 10px 20px;
            font-size: 1em;
            border: none;
            border-radius: 8px;
            background-color: #000000;
            color: white;
            cursor: pointer;
            box-shadow: 0 4px 6px rgba(0,0,0,0.1);
            transition: background-color 0.3s ease, transform 0.1s ease;
            margin-left: auto;
            margin-right: 12%;
        }
        .send-button:hover {
            background-color: #373a37;
            transform: scale(1.02);
        }

        /* PC端默认隐藏菜单*/
        .hamburger-icon {
            display: none; 
        }
        /*移动端适配，媒体查询*/
        @media (max-width: 300px) {
            .main-nav,
            #userStats {
                display: none !important;
            }

            .avatar-icon {
                display: none;
            }

            .hamburger-icon {
                display: inline-block;
                width: 24px;
                height: 24px;
                cursor: pointer;
            }

            .container {
                display: flex;
                flex-direction: column;
                gap: 2px;
                padding: 2px;
            }

            .chat-column.recognition {
                display: block !important;
                order: -1;
                background-color: #fff;
                border: 1px solid #ddd;
                border-radius: 5px;
                padding: 2px;
                flex: 0.5;
            }

            .recognition-box {
                min-height: 70px; /* 控制识别内容区域高度 */
                overflow-y: auto;
                border: 1px solid #86efac;
                border-radius: 5px;
                padding: 1px;
            }

            .chat-column.response {
                order: 0;
                min-height: 200px;
                background-color: #f9f9f9;
                border: 1px solid #add8e6;
                border-radius: 5px;
                padding: 2px;
                flex: 2;
            }

            .message-box {
                min-height: 100px;
                overflow-y: auto;
                border: 1px solid #ccc;
                border-radius: 1px;
                padding: 1px;
            }

            .column-header {
                font-weight: bold;
                margin-bottom: 2px;
            }
        }