.container {
            max-width: 800px;
            margin: 20px auto;
            padding: 20px;
            /* 已修改：优先使用 Inter 字体 */
            font-family: 'Inter', Arial, sans-serif;
            color: var(--theme-palette-color-3);
        }

        .form-group {
            margin-bottom: 20px;
            position: relative;
            width: 100%;
            clear: both; /* Added to ensure proper spacing */
        }

        label {
            display: block;
            margin-bottom: 8px;
            font-weight: bold;
            /* 原色 #333 改为标题色 Color 4 (纯白) */
            color: var(--theme-palette-color-4);
        }

        input[type="text"], 
        select, 
        textarea {
            width: 100%;
            padding: 10px;
            
            /* 背景改为深色 Color 6 */
            background-color: var(--theme-palette-color-6);
            
            /* 边框改为深灰 Color 5 */
            border: 1px solid var(--theme-palette-color-5);
            
            /* 文字 Color 3 */
            color: var(--theme-palette-color-3);
            
            border-radius: 4px;
            font-size: 16px;
            box-sizing: border-box; /* Added to include padding in width calculation */
            
            font-family: 'Inter', sans-serif;
            transition: all 0.3s ease;
        }
        
        /* 添加输入框聚焦效果 */
        input[type="text"]:focus, 
        select:focus, 
        textarea:focus {
            outline: none;
            border-color: var(--theme-palette-color-1);
            box-shadow: 0 0 0 2px rgba(139, 92, 246, 0.2);
        }

        select {
            /* 背景色改为深色 Color 6 */
            background-color: var(--theme-palette-color-6);
            
            /* 添加紫色箭头 SVG 以替换默认样式 */
            background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%238B5CF6' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
            background-repeat: no-repeat;
            background-position: right 10px center;
            background-size: 16px;
            appearance: none; /* 移除默认箭头 */
            
            cursor: pointer;
            height: auto;
            max-height: none;
            padding-right: 24px;
        }

        select option {
            padding: 10px;
            font-size: 16px;
            /* 确保下拉选项背景深色 */
            background-color: var(--theme-palette-color-6);
            color: var(--theme-palette-color-3);
        }

        textarea {
            height: 100px;
            resize: vertical;
            margin-bottom: 20px; /* Added spacing before button */
        }

        /* Button container */
        .button-container {
            width: 100%;
            clear: both;
            margin-top: 20px; /* Added top margin */
        }

        button {
            /* 背景改为 Color 1 (Purple) */
            background-color: var(--theme-palette-color-1); /* Changed to match your blue color */
            
            /* 文字 Color 4 */
            color: var(--theme-palette-color-4);
            
            padding: 12px 24px;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            
            /* 关键修改：强制宽度 100% */
            width: 100% !important;
            
            font-size: 16px;
            font-weight: 600;
            display: block; /* Ensures block-level display */
            margin: 0 auto; /* Centers the button */
            font-family: 'Inter', sans-serif;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            transition: background-color 0.3s ease, transform 0.1s ease;
        }

        button:hover {
            /* 悬停改为 Color 2 */
            background-color: var(--theme-palette-color-2);
            transform: translateY(-1px);
        }
        
        button:active {
            transform: translateY(0);
        }

        #result {
            margin-top: 20px;
            padding: 20px;
            
            /* 边框 Color 5 */
            border: 1px solid var(--theme-palette-color-5);
            
            border-radius: 4px;
            
            /* 背景改为深色卡片 Color 5 */
            background-color: var(--theme-palette-color-5);
            
            /* 文字 Color 3 */
            color: var(--theme-palette-color-3);
            
            white-space: pre-wrap;
            clear: both; /* Ensures it appears below all elements */
            line-height: 1.6;
        }

        .loading {
            display: none;
            text-align: center;
            margin: 20px 0;
            clear: both;
            color: var(--theme-palette-color-3);
        }

        /* Form styling */
        form {
            width: 100%;
            display: block;
            margin-bottom: 20px;
        }

        @media (max-width: 600px) {
            .container {
                padding: 10px;
            }

            button {
                width: 100% !important; /* Full width on mobile */
            }
        }