/* 提交表单样式 - 融入主页面风格 */
        .submit-container {
            max-width: 1800px;
            margin: 30px auto;
            padding: 30px;
            background: #fff;
            border-radius: 8px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }

        .submit-header {
            text-align: center;
            margin-bottom: 30px;
            padding-bottom: 20px;
            border-bottom: 2px solid #f0f0f0;
        }

        .submit-header h1 {
            font-size: 28px;
            color: #333;
            margin-bottom: 10px;
        }

        .submit-header p {
            color: #666;
            font-size: 14px;
        }

        .form-group {
            margin-bottom: 20px;
        }

        .form-group label {
            display: block;
            margin-bottom: 8px;
            color: #333;
            font-weight: 500;
        }

        .form-group label .required {
            color: #ff4444;
            margin-left: 3px;
        }

        .form-control {
            width: 100%;
            padding: 10px 15px;
            border: 1px solid #ddd;
            border-radius: 4px;
            font-size: 14px;
            transition: border-color 0.3s;
            box-sizing: border-box;
            height: 44px;
            line-height: 1.5;
        }
        .input {
            flex: 1;
            height: 44px !important; /* 统一高度为44px */
        }
        /* 友情链接代码区域样式 */
        .link-code-section {
            margin-top: 20px;
            padding: 15px;
            background: #f8f9fa;
            border-radius: 8px;
            border: 1px solid #eee;
        }

        .link-code-section h4 {
            margin: 0 0 10px 0;
            color: #333;
            font-size: 16px;
            font-weight: 600;
        }

        .link-code-section p {
            margin: 0 0 10px 0;
            font-size: 14px;
            color: #666;
            line-height: 1.5;
        }

        .link-code-box {
            position: relative;
            margin-bottom: 10px;
        }

        #linkCodeText {
            width: 100%;
            padding: 10px;
            border: 1px solid #ddd;
            border-radius: 4px;
            background: #fff;
            font-size: 13px;
            line-height: 1.5;
            resize: none;
            height: 80px;
            font-family: 'Courier New', monospace;
            box-sizing: border-box;
            color: #333;
        }

        #copyLinkCodeBtn {
            position: absolute;
            top: 8px;
            right: 8px;
            padding: 6px 12px;
            background: #007bff;
            color: #fff;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            font-size: 12px;
            transition: background 0.3s;
        }

        #copyLinkCodeBtn:hover {
            background: #0056b3;
        }

        .link-code-section .tips {
            margin: 0;
            font-size: 14px;
            color: #999;
        }

        .link-code-section .tips code {
            background: #f1f1f1;
            padding: 2px 4px;
            border-radius: 3px;
            font-size: 11px;
            color: #e83e8c;
        }

        /* 复制成功状态 */
        #copyLinkCodeBtn.success {
            background: #28a745 !important;
        }

        #copyLinkCodeBtn.success:hover {
            background: #218838 !important;
        }

        /* 修复下拉框样式 - 核心样式 */
        select.form-control {
            height: 44px;
            padding: 10px 15px;
            appearance: none;
            -webkit-appearance: none;
            -moz-appearance: none;
            background: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23666' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E") no-repeat right 15px center;
            background-size: 16px;
            padding-right: 40px;
        }

        select.form-control option {
            padding: 10px 15px;
            font-size: 14px;
        }

        .form-control:focus {
            outline: none;
            border-color: #E76031;
            box-shadow: 0 0 0 2px rgba(76, 175, 80, 0.2);
        }

        .form-control.error {
            border-color: #ff4444;
        }

        textarea.form-control {
            resize: vertical;
            min-height: 100px;
            height: auto;
            padding-top: 10px;
            padding-bottom: 10px;
        }

        .error-message {
            color: #ff4444;
            font-size: 12px;
            margin-top: 5px;
            display: none;
        }

        .submit-btn {
            width: 100%;
            padding: 12px;
            background: #E76031;
            color: white;
            border: none;
            border-radius: 4px;
            font-size: 16px;
            cursor: pointer;
            transition: background 0.3s;
            height: 48px;
        }

        .submit-btn:hover {
            background: #EC4E17;
        }

        .submit-btn:disabled {
            background: #ccc;
            cursor: not-allowed;
        }

        .back-home {
            text-align: center;
            margin-top: 20px;
        }

        .back-home a {
            color: #4CAF50;
            text-decoration: none;
        }

        .success-message {
            background: #d4edda;
            color: #155724;
            padding: 15px;
            border-radius: 4px;
            margin-bottom: 20px;
            display: none;
        }
        
        .error-alert {
            background: #f8d7da;
            color: #721c24;
            padding: 15px;
            border-radius: 4px;
            margin-bottom: 20px;
            display: none;
        }

        .guidelines {
            background: #f8f9fa;
            padding: 20px;
            border-radius: 4px;
            margin-bottom: 30px;
        }

        .guidelines h3 {
            font-size: 16px;
            color: #333;
            margin-bottom: 10px;
        }

        .guidelines ul {
            margin: 0;
            padding-left: 20px;
        }

        .guidelines li {
            color: #666;
            font-size: 14px;
            margin-bottom: 5px;
        }

        .char-count {
            text-align: right;
            font-size: 12px;
            color: #999;
            margin-top: 5px;
        }

        /* 验证码样式 */
        .captcha-group {
            display: flex;
            gap: 10px;
            align-items: center;
        }
        
        .captcha-input {
            flex: 1;
        }
        
        .captcha-img {
            width: 100px;
            height: 44px;
            border: 1px solid #ddd;
            border-radius: 4px;
            cursor: pointer;
            background: #f8f9fa;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            letter-spacing: 5px;
            color: #E76031;
            font-weight: bold;
            user-select: none;
        }

        /* 新增：TDK获取按钮样式 - 修复高度问题 */
        .url-input-group {
            display: flex;
            gap: 10px;
            align-items: stretch;
        }
        
        .url-input {
            flex: 1;
        }
        
        .get-tdk-btn {
            width: 100px;
            height: 44px;
            padding: 0 15px;
            background: #E76031;
            color: white;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            font-size: 14px;
            transition: background 0.3s;
            display: flex;
            align-items: center;
            justify-content: center;
            line-height: 1;
        }
        
        .get-tdk-btn:hover {
            background: #EC4E17;
        }
        
        .get-tdk-btn:disabled {
            background: #ccc;
            cursor: not-allowed;
        }
        
        .tdk-tips {
            font-size: 12px;
            color: #999;
            margin-top: 5px;
        }

        /* 提交表单容器样式 - 适配日夜模式 */
        .submit-container {
            max-width: 1800px;
            margin: 30px auto;
            padding: 30px;
            border-radius: 8px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            /* 默认日间模式背景 */
            background: #fff;
        }

        /* 提交须知容器样式 - 适配日夜模式 */
        .guidelines {
            padding: 20px;
            border-radius: 4px;
            margin-bottom: 30px;
            /* 默认日间模式背景 */
            background: #f8f9fa;
        }

        /* 夜间模式样式覆盖 */
        .io-black-mode .submit-container {
            background: #2d2d2d; /* 夜间模式深色背景 */
            box-shadow: 0 2px 10px rgba(0,0,0,0.3); /* 增强夜间阴影 */
        }

        .io-black-mode .guidelines {
            background: #383838; /* 夜间模式浅一点的深色背景 */
        }

        /* 补充：夜间模式下文字颜色适配 */
        .io-black-mode .submit-container label,
        .io-black-mode .submit-container h1,
        .io-black-mode .submit-container p,
        .io-black-mode .guidelines h3,
        .io-black-mode .guidelines li {
            color: #e0e0e0; /* 夜间模式文字浅灰色 */
        }

        .io-black-mode .guidelines .required,
        .io-black-mode .error-message,
        .io-black-mode .error-alert {
            color: #ff6b6b; /* 夜间模式错误文字更醒目 */
        }

        .io-black-mode .success-message {
            color: #4ecdc4; /* 夜间模式成功文字更协调 */
            background: #1a3b39; /* 夜间模式成功提示背景 */
        }

        .io-black-mode .error-alert {
            background: #402426; /* 夜间模式错误提示背景 */
        }

        .io-black-mode .form-control,
        .io-black-mode select.form-control,
        .io-black-mode .captcha-img {
            background-color: #383838;
            border-color: #444;
            color: #E76031;
        }

        .io-black-mode select.form-control {
            /* 夜间模式下拉框箭头颜色调整 */
            background-image: url("");
        }

        .io-black-mode .form-control:focus {
            border-color: #4ecdc4;
            box-shadow: 0 0 0 2px rgba(78, 205, 196, 0.2);
        }

        /* 统计信息样式 */
        .stats-container {
            margin-top: 15px;
            background: #f8f9fa;
            padding: 12px 20px;
            border-radius: 8px;
            display: inline-block;
            box-shadow: 0 1px 3px rgba(0,0,0,0.1);
        }

        .stats-row {
            display: flex;
            gap: 25px;
            flex-wrap: wrap;
            justify-content: center;
        }

        .stat-item {
            display: flex;
            align-items: center;
        }

        .stat-label {
            font-size: 14px;
            color: #666;
        }

        .stat-value {
            font-size: 16px;
            font-weight: bold;
            margin-left: 5px;
        }

        .stat-value.total { color: #4CAF50; }
        .stat-value.approved { color: #2196F3; }
        .stat-value.pending { color: #FF9800; }
        .stat-value.rejected { color: #F44336; }

        /* 夜间模式适配 */
        .io-black-mode .stats-container {
            background: #383838;
            box-shadow: 0 1px 3px rgba(0,0,0,0.3);
        }

        .io-black-mode .stat-label {
            color: #ccc;
        }

        /* 夜间模式友情链接区域适配 */
        .io-black-mode .link-code-section {
            background: #383838;
            border-color: #444;
        }

        .io-black-mode .link-code-section h4 {
            color: #e0e0e0;
        }

        .io-black-mode .link-code-section p {
            color: #ccc;
        }

        .io-black-mode #linkCodeText {
            background: #2d2d2d;
            border-color: #444;
            color: #e0e0e0;
        }

        .io-black-mode .link-code-section .tips {
            color: #aaa;
        }

        .io-black-mode .link-code-section .tips code {
            background: #444;
            color: #ff7bac;
        }