* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Microsoft YaHei', Arial, sans-serif;
            background-color: #8b6914;
            background-image: 
                repeating-linear-gradient(90deg, rgba(255,255,255,0.07), rgba(255,255,255,0.07) 1px, transparent 1px, transparent 50px),
                repeating-linear-gradient(0deg, rgba(255,255,255,0.05), rgba(255,255,255,0.05) 1px, transparent 1px, transparent 50px),
                linear-gradient(90deg, #3c3e7b, #9fd7e5, #c38aaf);
            background-size: 50px 50px, 50px 50px, 100% 100%;
            min-height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
        }
        .login-container {
            background: white;
            padding: 40px;
            border-radius: 10px;
            box-shadow: 0 10px 40px rgba(0,0,0,0.2);
            width: 100%;
            max-width: 400px;
        }
        .login-header {
            text-align: center;
            margin-bottom: 30px;
        }
        .login-header h1 {
            color: #333;
            font-size: 24px;
            margin-bottom: 10px;
        }
        .login-header p {
            color: #666;
            font-size: 14px;
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-group label {
            display: block;
            margin-bottom: 5px;
            color: #333;
            font-size: 14px;
        }
        .form-group input {
            width: 100%;
            padding: 12px;
            border: 1px solid #ddd;
            border-radius: 5px;
            font-size: 14px;
            transition: border-color 0.3s;
        }
        .form-group input:focus {
            outline: none;
            border-color: #667eea;
        }
        .checkbox-group {
            display: flex;
            flex-direction: column;
            gap: 8px;
            padding: 10px;
            border: 1px solid #ddd;
            border-radius: 5px;
            max-height: 200px;
            overflow-y: auto;
        }
        .checkbox-group label {
            display: flex;
            align-items: center;
            gap: 8px;
            cursor: pointer;
            padding: 5px 8px;
            border-radius: 4px;
            transition: background-color 0.2s;
            margin-bottom: 0;
            font-weight: normal;
        }
        .checkbox-group label:hover {
            background-color: #f5f7fa;
        }
        .checkbox-group input[type="checkbox"] {
            width: 16px;
            height: 16px;
            cursor: pointer;
            accent-color: #667eea;
        }
        .btn-login {
            width: 100%;
            padding: 12px;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            border: none;
            border-radius: 5px;
            font-size: 16px;
            cursor: pointer;
            transition: transform 0.2s;
        }
        .btn-login:hover {
            transform: translateY(-2px);
        }
        .btn-login:disabled {
            opacity: 0.6;
            cursor: not-allowed;
            transform: none;
        }
        .error-message {
            color: #e74c3c;
            font-size: 14px;
            margin-top: 10px;
            text-align: center;
            display: none;
        }
        .loading {
            display: inline-block;
            width: 20px;
            height: 20px;
            border: 3px solid rgba(255,255,255,.3);
            border-radius: 50%;
            border-top-color: white;
            animation: spin 1s ease-in-out infinite;
            margin-right: 8px;
            vertical-align: middle;
        }
        @keyframes spin {
            to { transform: rotate(360deg); }
        }

        /* ==================== 登录页面移动端响应式样式 ==================== */
        @media (max-width: 768px) {
            .login-container {
                padding: 30px 20px;
                margin: 20px;
                max-width: 100%;
            }
            .login-header h1 {
                font-size: 20px;
            }
            .login-header p {
                font-size: 13px;
            }
            .form-group input {
                padding: 14px;
                font-size: 16px;
                min-height: 44px;
            }
            .btn-login {
                padding: 14px;
                font-size: 16px;
                min-height: 44px;
            }
        }

        @media (max-width: 480px) {
            .login-container {
                padding: 25px 15px;
                border-radius: 8px;
            }
            .login-header h1 {
                font-size: 18px;
            }
        }
        #translate {
            position: absolute;
            top: 15px;
            right: 15px;
            z-index: 1000;
        }
        #translateSelectLanguage {
            background: rgba(255,255,255,0.9);
            color: #333;
            border: 1px solid #ddd;
            padding: 5px 10px;
            border-radius: 4px;
            cursor: pointer;
            font-size: 12px;
            outline: none;
            width: 120px;
            max-width: 120px;
        }
        #translateSelectLanguage:hover {
            border-color: #667eea;
        }
        #translateSelectLanguage option {
            max-width: 110px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }