:root {
            --primary-color: #409EFF;
            --success-color: #67C23A;
            --warning-color: #E6A23C;
            --danger-color: #F56C6C;
            --info-color: #909399;
            --light-color: #F5F7FA;
            --dark-color: #303133;
            --border-radius: 4px;
            --transition-duration: 0.2s;
        }

        /* body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: #f9fafc;
            margin: 0;
            padding: 20px;
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 100vh;
        } */

        .form-container {
            background-color: white;
            border-radius: 8px;
            max-width: 500px;
            width: 100%;
        }

        .form-title {
            font-size: 20px;
            font-weight: 500;
            color: var(--dark-color);
            margin-bottom: 24px;
            text-align: left;
            /* 标题居左 */
        }

        .form-group {
            margin-bottom: 10px;
        }

        .form-input-wrapper {
            position: relative;
        }

        .form-input {
            width: 100%;
            height: 60px;
            padding: 10px 15px;
            font-size: 14px;
            line-height: 1.5;
            color: var(--dark-color);
            background-color: white;
            border: 1px solid #dcdfe6;
            border-radius: var(--border-radius);
            transition: border-color var(--transition-duration), box-shadow var(--transition-duration);
            box-sizing: border-box;
        }

        .form-input:focus {
            outline: none;
            border-color: var(--primary-color);
            box-shadow: 0 0 0 1px rgba(64, 158, 255, 0.2);
        }

        .form-input.error {
            border-color: var(--danger-color);
        }

        .form-input.error:focus {
            box-shadow: 0 0 0 1px rgba(245, 108, 108, 0.2);
        }

        .form-textarea {
            height: auto;
            resize: vertical;
            min-height: 120px;
            resize: none;
        }

        .form-label {
            position: absolute;
            left: 15px;
            top: 50%;
            transform: translateY(-50%);
            color: #909399;
            font-size: 14px;
            pointer-events: none;
            transition: all var(--transition-duration);
        }

        .form-input:focus+.form-label,
        .form-input:not(:placeholder-shown)+.form-label {
            top: 0;
            transform: translateY(-50%) scale(0.9);
            background-color: white;
            padding: 0 5px;
            color: var(--primary-color);
        }

        .form-input.error+.form-label {
            color: var(--danger-color);
        }

        .form-success-icon {
            position: absolute;
            right: 10px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--success-color);
            opacity: 0;
            transition: opacity var(--transition-duration);
        }

        .form-input:not(:placeholder-shown):valid~.form-success-icon {
            opacity: 1;
        }

        .form-error-message {
            color: var(--danger-color);
            font-size: 12px;
            margin-top: 4px;
            display: flex;
            align-items: center;
            opacity: 0;
            transition: opacity var(--transition-duration);
        }

        .form-error-message.show {
            opacity: 1;
        }

        .form-error-icon {
            margin-right: 4px;
        }

        .form-button {
            width: 100%;
            height: 40px;
            background-color: var(--primary-color);
            border: none;
            color: white;
            font-size: 14px;
            font-weight: 500;
            border-radius: var(--border-radius);
            cursor: pointer;
            transition: background-color var(--transition-duration), transform var(--transition-duration), box-shadow var(--transition-duration);
        }

        .form-button:hover {
            background-color: #66b1ff;
        }

        .form-button:active {
            background-color: #3a8ee6;
            transform: translateY(1px);
        }

        .form-button:disabled {
            background-color: #a0cfff;
            cursor: not-allowed;
        }

        .toast {
            position: fixed;
            top: 20px;
            right: 20px;
            background-color: white;
            border-radius: var(--border-radius);
            box-shadow: 0 2px 12px 0 rgba(0, 0, 0, 0.1);
            padding: 15px 20px;
            display: none; /* 初始隐藏 */
            align-items: center;
            transform: translateX(calc(100% + 20px));
            transition: transform 0.3s ease-out;
            z-index: 1000;
        }

        .toast.show {
            display: flex; /* 显示时改为 flex */
            transform: translateX(0);
        }

        .toast-icon {
            margin-right: 10px;
            font-size: 16px;
        }

        .toast-success .toast-icon {
            color: var(--success-color);
        }

        .toast-error .toast-icon {
            color: var(--danger-color);
        }

        .toast-warning .toast-icon {
            color: var(--warning-color);
        }

        .toast-info .toast-icon {
            color: var(--info-color);
        }

        .toast-content {
            flex: 1;
        }

        .toast-title {
            font-size: 14px;
            font-weight: 500;
            color: var(--dark-color);
            margin-bottom: 2px;
        }

        .toast-message {
            font-size: 12px;
            color: var(--info-color);
        }

        .toast-close {
            margin-left: 15px;
            color: #c0c4cc;
            cursor: pointer;
            transition: color var(--transition-duration);
        }

        .toast-close:hover {
            color: var(--dark-color);
        }

        /* 动画 */
        @keyframes fadeIn {
            from {
                opacity: 0;
            }

            to {
                opacity: 1;
            }
        }

        @keyframes fadeOut {
            from {
                opacity: 1;
            }

            to {
                opacity: 0;
            }
        }