/* 前端表单样式 - 大气美化版 */

/* CSS变量定义 - 默认主题 */
:root {
    /* 主色调 - 默认采用现代蓝色系 */
    --primary-color: #4f46e5;
    --primary-hover: #4338ca;
    --primary-light: #818cf8;
    --primary-dark: #3730a3;
    --secondary-color: #64748b;
    --accent-color: #f59e0b;
    
    /* 状态颜色 */
    --success-color: #10b981;
    --error-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #3b82f6;
    
    /* 背景色 - 默认浅色主题 */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-card: #ffffff;
    --bg-success: #dcfce7;
    --bg-success-light: #f0fdf4;
    --bg-error: #fee2e2;
    --bg-error-light: #fef2f2;
    --bg-warning: #fef3c7;
    --bg-warning-light: #fffbeb;
    --bg-info: #dbeafe;
    --bg-info-light: #eff6ff;
    
    /* 文字色 */
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --text-danger: #ef4444;
    --text-success: #10b981;
    --text-white: #ffffff;
    
    /* 边框色 */
    --border-color: #e2e8f0;
    --border-light: #f1f5f9;
    --border-success: #bbf7d0;
    --border-error: #fecaca;
    --border-warning: #fde68a;
    
    /* 阴影 */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* 圆角 - 更现代的圆角设计 */
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    
    /* 间距 */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    
    /* 渐变 */
    --gradient-primary: linear-gradient(135deg, #4f46e5 0%, #8b5cf6 100%);
    --gradient-secondary: linear-gradient(135deg, #64748b 0%, #94a3b8 100%);
    --gradient-accent: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    --gradient-success: linear-gradient(135deg, #10b981 0%, #34d399 100%);
    --gradient-error: linear-gradient(135deg, #ef4444 0%, #f87171 100%);
    
    /* 阴影优化 - 更柔和的阴影效果 */
    --elevation-1: 0 2px 4px rgba(0, 0, 0, 0.05), 0 1px 2px rgba(0, 0, 0, 0.1);
    --elevation-2: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
    --elevation-3: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --elevation-4: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

/* 深色主题支持 */
@media (prefers-color-scheme: dark) {
    :root {
        /* 深色主题主色调 */
        --primary-color: #6366f1;
        --primary-hover: #4f46e5;
        --primary-light: #818cf8;
        --primary-dark: #4f46e5;
        
        /* 状态颜色 - 深色主题 */
        --success-color: #34d399;
        --error-color: #f87171;
        --warning-color: #fbbf24;
        --info-color: #60a5fa;
        
        /* 深色主题背景色 */
        --bg-primary: #0f172a;
        --bg-secondary: #1e293b;
        --bg-tertiary: #334155;
        --bg-card: #1e293b;
        --bg-success: #065f46;
        --bg-success-light: #064e3b;
        --bg-error: #991b1b;
        --bg-error-light: #7f1d1d;
        --bg-warning: #92400e;
        --bg-warning-light: #78350f;
        --bg-info: #1e40af;
        --bg-info-light: #1e3a8a;
        
        /* 深色主题文字色 */
        --text-primary: #f1f5f9;
        --text-secondary: #cbd5e1;
        --text-muted: #94a3b8;
        --text-danger: #fca5a5;
        --text-success: #6ee7b7;
        --text-white: #ffffff;
        
        /* 深色主题边框色 */
        --border-color: #334155;
        --border-light: #475569;
        --border-success: #047857;
        --border-error: #b91c1c;
        --border-warning: #d97706;
        
        /* 深色主题阴影 */
        --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.2);
        --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
        --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
        --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 10px 10px -5px rgba(0, 0, 0, 0.4);
        
        /* 深色主题渐变 */
        --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
        --gradient-success: linear-gradient(135deg, #10b981 0%, #059669 100%);
        --gradient-error: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    }
}

/* 重置样式 - 仅应用于表单容器内的元素 */
.wpfb-form-container * {
    box-sizing: border-box;
}

/* 表单容器 - 大气设计 */
.wpfb-form-container {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-primary);
    line-height: 1.6;
    max-width: 100%;
}

/* 表单容器 - 主容器样式 */
.wpfb-form-container {
    width: 100%;
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    box-shadow: var(--elevation-3);
    border: 1px solid var(--border-color);
    overflow: hidden;
    margin: 0 auto;
    transition: all 0.3s ease;
}

.wpfb-form-container:hover {
    box-shadow: var(--elevation-4);
    transform: translateY(-2px);
}

/* 表单头部 - 大气设计 */
.wpfb-form-container .form-header {
    background: var(--gradient-primary);
    padding: var(--space-xl);
    text-align: center;
    position: relative;
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    overflow: hidden;
    border-top: 3px solid #2563eb;
}

.wpfb-form-container .form-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(255, 255, 255, 0.15) 0%, transparent 30%),
        radial-gradient(circle at 80% 40%, rgba(255, 255, 255, 0.1) 0%, transparent 40%);
}

.wpfb-form-container .form-header h1 {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: 700;
    color: white;
    margin-bottom: var(--space-sm);
    position: relative;
    z-index: 1;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.wpfb-form-container .form-header p {
    font-size: clamp(1rem, 1.5vw, 1.25rem);
    color: rgba(255, 255, 255, 0.9);
    position: relative;
    z-index: 1;
    max-width: 80%;
    margin: 0 auto;
}

/* 表单主体 - 大气设计 */
.wpfb-form-container .form-body {
    padding: var(--space-xl);
    background: var(--bg-card);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

/* 表单组 - 大气设计 */
.wpfb-form-container .form-group {
    margin-bottom: var(--space-lg);
    position: relative;
    animation: fadeIn 0.3s ease;
}

/* 表单行（用于并排字段） */
.wpfb-form-container .form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.wpfb-form-container .form-group:last-child {
    margin-bottom: 0;
}

.wpfb-form-container .form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
    font-size: 0.9375rem;
    letter-spacing: -0.01em;
    transition: all 0.3s ease;
}

.wpfb-form-container .form-group:focus-within label {
    color: var(--primary-color);
}

.wpfb-form-container .form-group .required {
    color: var(--text-danger);
    margin-left: var(--space-xs);
    font-weight: 700;
}

.wpfb-form-container .form-group .description {
    color: var(--text-muted);
    font-size: 0.8125rem;
    margin-top: var(--space-xs);
    line-height: 1.4;
}

/* 输入控件 - 大气设计 */
.wpfb-form-container .form-control,
.wpfb-form-container .form-input {
    width: 100%;
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    color: var(--text-primary);
    font-size: 0.9375rem;
    transition: all 0.3s ease;
    font-family: inherit;
    letter-spacing: -0.01em;
}

.wpfb-form-container .form-control:focus,
.wpfb-form-container .form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    background: var(--bg-card);
    box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.1);
    transform: translateY(-1px);
}

.wpfb-form-container .form-control::placeholder,
.wpfb-form-container .form-input::placeholder {
    color: var(--text-muted);
    letter-spacing: normal;
}

.wpfb-form-container .form-control:hover:not(:focus),
.wpfb-form-container .form-input:hover:not(:focus) {
    border-color: var(--primary-light);
}

.wpfb-form-container .form-control.error,
.wpfb-form-container .form-input.error {
    border-color: var(--text-danger);
    box-shadow: 0 0 0 4px rgba(239, 68, 68, 0.1);
}

.wpfb-form-container .form-control.success,
.wpfb-form-container .form-input.success {
    border-color: var(--text-success);
    box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.1);
}

/* 文本域 - 大气设计 */
.wpfb-form-container textarea.form-control,
.wpfb-form-container textarea.form-input {
    resize: vertical;
    min-height: 120px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
}

.wpfb-form-container textarea.form-control:focus,
.wpfb-form-container textarea.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    background: var(--bg-card);
    box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.1);
    transform: translateY(-1px);
}

/* 选择框 - 大气设计 */
.wpfb-form-container .form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%2394a3b8' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 0.5rem center;
    background-repeat: no-repeat;
    background-size: 1.5em 1.5em;
    padding-right: 2.5rem;
    border: 2px solid var(--border-color);
    transition: all 0.3s ease;
}

.wpfb-form-container .form-select:focus {
    outline: none;
    border-color: var(--primary-color);
    background: var(--bg-card);
    box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.1);
    transform: translateY(-1px);
}

/* 复选框和单选框组 - 大气设计 */
.wpfb-form-container .checkbox-group,
.wpfb-form-container .radio-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

/* 同意条款复选框样式 */
.wpfb-form-container .form-terms {
    margin: var(--space-xl) 0;
}

.wpfb-form-container .terms-option {
    display: flex;
    align-items: flex-start;
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.wpfb-form-container .checkbox-item,
.wpfb-form-container .radio-item,
.wpfb-form-container .checkbox-option,
.wpfb-form-container .radio-option {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    cursor: pointer;
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.wpfb-form-container .checkbox-item:hover,
.wpfb-form-container .radio-item:hover,
.wpfb-form-container .checkbox-option:hover,
.wpfb-form-container .radio-option:hover {
    background: var(--bg-tertiary);
    border-color: var(--primary-light);
    transform: translateX(2px);
}

.wpfb-form-container .checkbox-item input,
.wpfb-form-container .radio-item input,
.wpfb-form-container .checkbox-option input,
.wpfb-form-container .radio-option input {
    width: 18px;
    height: 18px;
    accent-color: var(--primary-color);
    margin: 0;
    transition: all 0.3s ease;
}

.wpfb-form-container .checkbox-item label,
.wpfb-form-container .radio-item label,
.wpfb-form-container .checkbox-option label,
.wpfb-form-container .radio-option label {
    margin-bottom: 0;
    font-weight: 500;
    cursor: pointer;
    flex: 1;
    font-size: 0.9375rem;
    transition: all 0.3s ease;
}

/* 文件上传 - 大气设计 */
.wpfb-form-container .file-upload {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-white);
    transition: all 0.3s ease;
    cursor: pointer;
}

.wpfb-form-container .file-upload-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-md);
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
    font-size: 0.875rem;
}

.wpfb-form-container .file-upload-label span:first-child {
    background: var(--primary-color);
    color: white;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    font-weight: 500;
}

.wpfb-form-container .file-upload-label span:last-child {
    color: var(--text-secondary);
}

.wpfb-form-container .file-upload:hover .file-upload-label {
    background: var(--bg-tertiary);
}

.wpfb-form-container .file-upload:hover .file-upload-label span:first-child {
    background: var(--primary-dark);
}

.wpfb-form-container .file-upload:hover {
    border-color: var(--primary-color);
    background: var(--bg-tertiary);
}

.wpfb-form-container .file-upload.drag-over {
    border-color: var(--primary-color);
    background: var(--bg-secondary);
}

.wpfb-form-container .file-upload-icon {
    font-size: 2rem;
    color: var(--text-muted);
    margin-bottom: var(--space-sm);
}

.wpfb-form-container .file-upload input {
    display: none;
}

.wpfb-form-container .file-preview {
    margin-top: var(--space-md);
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.wpfb-form-container .file-item {
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    padding: var(--space-sm);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.75rem;
}

.wpfb-form-container .file-remove {
    color: var(--text-danger);
    cursor: pointer;
    padding: var(--space-xs);
    border-radius: var(--radius-sm);
    transition: all 0.3s ease;
}

.wpfb-form-container .file-remove:hover {
    background: var(--text-danger);
    color: white;
}

/* 富文本编辑器 - 大气设计 */
.wpfb-form-container .rich-text-editor {
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.wpfb-form-container .editor-toolbar {
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-light);
    padding: var(--space-sm);
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
}

.wpfb-form-container .editor-toolbar button {
    background: none;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    padding: var(--space-xs) var(--space-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
}

.wpfb-form-container .editor-toolbar button:hover {
    background: var(--bg-secondary);
    border-color: var(--border-light);
    color: var(--text-primary);
}

/* 编辑器内容 - 大气设计 */
.wpfb-form-container .editor-content {
    min-height: 200px;
    border: 2px solid transparent;
    padding: var(--space-md);
    background: var(--bg-card);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    line-height: 1.6;
    transition: all 0.3s ease;
}

.wpfb-form-container .editor-content:focus {
    outline: none;
    border-color: var(--primary-color);
    background: var(--bg-white);
    box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.1);
    transform: translateY(-1px);
}

/* 树形选择器 - 大气设计 */
.wpfb-form-container .tree-select {
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-card);
    max-height: 300px;
    overflow-y: auto;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.wpfb-form-container .tree-node {
    padding: var(--space-sm) var(--space-md);
    cursor: pointer;
    transition: all 0.3s ease;
    border-bottom: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    position: relative;
}

.wpfb-form-container .tree-node:last-child {
    border-bottom: none;
}

.wpfb-form-container .tree-node:hover {
    background: var(--bg-tertiary);
    border-color: var(--primary-light);
    transform: translateX(2px);
}

.wpfb-form-container .tree-node.selected {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-hover);
    box-shadow: var(--shadow-md);
}

.wpfb-form-container .tree-node.parent {
    font-weight: 600;
    color: var(--primary-color);
}

.wpfb-form-container .tree-children {
    margin-left: var(--space-lg);
    position: relative;
}

.wpfb-form-container .tree-children::before {
    content: "→";
    position: absolute;
    left: -15px;
    color: var(--primary-color);
    font-size: 0.75rem;
    opacity: 0.7;
}

/* 日期时间选择器 - 大气设计 */
.wpfb-form-container .date-time-picker {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
}

.wpfb-form-container .date-picker,
.wpfb-form-container .time-picker {
    position: relative;
}

.wpfb-form-container .date-picker input,
.wpfb-form-container .time-picker input {
    padding-right: 2.5rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    background: var(--bg-card);
    transition: all 0.3s ease;
    font-weight: 500;
}

.wpfb-form-container .date-picker input:focus,
.wpfb-form-container .time-picker input:focus {
    outline: none;
    border-color: var(--primary-color);
    background: var(--bg-white);
    box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.1);
    transform: translateY(-1px);
}

.wpfb-form-container .date-picker::after,
.wpfb-form-container .time-picker::after {
    content: '📅';
    position: absolute;
    right: var(--space-md);
    top: 50%;
    transform: translateY(-50%);
    pointer-events: none;
}

.wpfb-form-container .time-picker::after {
    content: '⏰';
}

/* 表单底部 - 大气设计 */
.wpfb-form-container .form-footer {
    margin-top: var(--space-xl);
    padding: 0;
    border-top: none;
    background: transparent;
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
    justify-content: center;
    align-items: center;
}

/* 表单底部文本 */
.wpfb-form-container .form-footer p {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-top: var(--space-xl);
}

/* 按钮样式 - 大气设计 */
.wpfb-form-container .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    border: 2px solid transparent;
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    min-width: 120px;
    font-family: inherit;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    user-select: none;
}

.wpfb-form-container .btn:hover {
    opacity: 1;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.wpfb-form-container .btn:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

.wpfb-form-container .btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* 主按钮 - 大气设计 */
.wpfb-form-container .btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
    width: 100%;
    max-width: 400px;
    padding: 12px 24px;
}

/* 提交按钮特定样式 */
.wpfb-form-container .btn-submit {
    background: linear-gradient(135deg, #3b82f6, #2563eb);
    color: white;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
    position: relative;
    overflow: hidden;
    width: 100%;
    max-width: 400px;
    padding: 12px 24px;
    transition: all 0.3s ease;
    font-weight: 500;
    letter-spacing: 0.025em;
}

.wpfb-form-container .btn-submit:hover {
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(59, 130, 246, 0.4);
}

.wpfb-form-container .btn-submit:active {
    transform: translateY(0);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.wpfb-form-container .btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.wpfb-form-container .btn-primary:hover::before {
    left: 100%;
}

.wpfb-form-container .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.wpfb-form-container .btn-primary:active {
    transform: translateY(0);
    box-shadow: var(--shadow-md);
}

/* 次要按钮 - 大气设计 */
.wpfb-form-container .btn-secondary {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.wpfb-form-container .btn-secondary:hover {
    background: var(--bg-tertiary);
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.wpfb-form-container .btn-secondary:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

.wpfb-form-container .btn-secondary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
    box-shadow: var(--shadow-sm);
}

/* 验证消息 - 大气设计 */
.wpfb-form-container .validation-message {
    font-size: 0.875rem;
    margin-top: var(--space-xs);
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    font-weight: 500;
    animation: fadeIn 0.3s ease;
}

.wpfb-form-container .validation-message.error {
    color: var(--error-color);
    background: var(--bg-error-light);
    border-left: 3px solid var(--error-color);
}

.wpfb-form-container .validation-message.success {
    color: var(--success-color);
    background: var(--bg-success-light);
    border-left: 3px solid var(--success-color);
}

.wpfb-form-container .validation-message.warning {
    color: var(--warning-color);
    background: var(--bg-warning-light);
    border-left: 3px solid var(--warning-color);
}

/* 加载状态 - 大气设计 */
.wpfb-form-container .loading {
    opacity: 0.7;
    pointer-events: none;
}

.wpfb-form-container .spinner {
    display: inline-block;
    width: 1.25rem;
    height: 1.25rem;
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-5px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-10px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* 成功/错误消息 - 大气设计 */
.wpfb-form-container .success-message,
.wpfb-form-container .error-message {
    padding: var(--space-lg);
    margin-bottom: var(--space-lg);
    border-radius: var(--radius-lg);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: var(--space-md);
    animation: slideIn 0.3s ease;
    box-shadow: var(--shadow-md);
    border: 2px solid transparent;
    font-size: 1rem;
}

.wpfb-form-container .success-message {
    background: linear-gradient(to right, var(--bg-success), var(--bg-success-light));
    color: var(--success-color);
    border-color: var(--border-success);
}

.wpfb-form-container .error-message {
    background: linear-gradient(to right, var(--bg-error), var(--bg-error-light));
    color: var(--error-color);
    border-color: var(--border-error);
}

/* 响应式设计 - 大气设计 */
@media (max-width: 768px) {
    .wpfb-form-container {
        max-width: 100%;
        margin: 0;
        border-radius: 0;
        box-shadow: none;
    }
    
    .wpfb-form-container .form-header {
        padding: var(--space-lg) var(--space-md);
        border-radius: 0;
    }
    
    .wpfb-form-container .form-header h1 {
        font-size: clamp(1.5rem, 5vw, 2rem);
    }
    
    .wpfb-form-container .form-header p {
        font-size: clamp(0.875rem, 3vw, 1rem);
    }
    
    .wpfb-form-container .form-body {
        padding: var(--space-lg) var(--space-md);
    }
    
    .wpfb-form-container .form-group {
        margin-bottom: var(--space-lg);
    }
    
    .wpfb-form-container .form-group label {
        font-size: 0.9375rem;
        margin-bottom: var(--space-sm);
    }
    
    .wpfb-form-container .form-footer {
        padding: var(--space-lg) var(--space-md);
        flex-direction: column;
        align-items: stretch;
    }
    
    .wpfb-form-container .date-time-picker {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    
    .wpfb-form-container .btn {
        width: 100%;
        min-width: auto;
        padding: var(--space-md);
        font-size: 0.9375rem;
        letter-spacing: 0.03em;
    }
    
    .wpfb-form-container .success-message,
    .wpfb-form-container .error-message {
        padding: var(--space-md);
        font-size: 0.875rem;
        flex-direction: column;
        text-align: center;
        gap: var(--space-sm);
    }
    
    .wpfb-form-container .tree-select {
        max-height: 250px;
    }
}

/* 滚动条样式 - 仅应用于表单容器内的元素 */
.wpfb-form-container ::-webkit-scrollbar {
    width: 6px;
}

.wpfb-form-container ::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
}

.wpfb-form-container ::-webkit-scrollbar-thumb {
    background: var(--border-light);
    border-radius: var(--radius-sm);
}

.wpfb-form-container ::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}

/* 打印样式 */
@media print {
    .wpfb-form-container .form-footer {
        display: none;
    }
    
    .wpfb-form-container {
        box-shadow: none;
        border: 1px solid #ccc;
    }
}

/* 自适应主题样式 */
/* 表单容器 - 自适应主题 */
.wpfb-form-container.theme-adaptive {
    max-width: var(--nav-width, 1200px);
    width: 100%;
    margin: 0 auto;
    transition: all 0.3s ease;
}

/* 主题切换按钮 - 自适应主题 */
.wpfb-theme-toggle {
    position: absolute;
    top: 1rem;
    right: 1rem;
    z-index: 1000;
}

.theme-toggle-btn {
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    width: 3rem;
    height: 3rem;
    font-size: 1.25rem;
    cursor: pointer;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}

.theme-toggle-btn:active {
    transform: scale(0.95);
}

/* 深色主题覆盖样式 - 自适应主题 */
.wpfb-form-container.theme-adaptive.dark-theme {
    --bg-card: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --border-color: #334155;
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
}

.wpfb-form-container.theme-adaptive.dark-theme .form-header {
    background: linear-gradient(135deg, #3730a3 0%, #4f46e5 100%);
}

.wpfb-form-container.theme-adaptive.dark-theme .btn-submit {
    background: linear-gradient(135deg, #4f46e5, #3730a3);
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.4);
}

.wpfb-form-container.theme-adaptive.dark-theme .btn-submit:hover {
    background: linear-gradient(135deg, #4338ca, #3730a3);
    box-shadow: 0 6px 16px rgba(79, 70, 229, 0.5);
}

/* 深色主题输入控件样式 */
.wpfb-form-container.theme-adaptive.dark-theme .form-control,
.wpfb-form-container.theme-adaptive.dark-theme .form-input {
    background: #1e293b;
    border-color: #334155;
    color: #f1f5f9;
}

.wpfb-form-container.theme-adaptive.dark-theme .form-control:focus,
.wpfb-form-container.theme-adaptive.dark-theme .form-input:focus {
    border-color: #6366f1;
    background: #1e293b;
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.2);
}

/* 浅色主题覆盖样式 - 自适应主题 */
.wpfb-form-container.theme-adaptive.light-theme {
    --bg-card: #ffffff;
    --bg-tertiary: #f1f5f9;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

/* 响应式设计 - 自适应主题特定 */
@media (max-width: 768px) {
    .wpfb-form-container.theme-adaptive {
        max-width: 100%;
        width: 100%;
        border-radius: 0;
        box-shadow: none;
        margin: 0;
    }
    
    .wpfb-form-container.theme-adaptive .form-header {
        padding: 2rem 1rem;
        border-radius: 0;
    }
    
    .wpfb-form-container.theme-adaptive .form-body {
        padding: 2rem 1rem;
    }
    
    .wpfb-form-container.theme-adaptive .form-footer {
        padding: 1.5rem 1rem;
    }
    
    .wpfb-form-container.theme-adaptive .form-row {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .theme-toggle-btn {
        width: 2.5rem;
        height: 2.5rem;
        font-size: 1rem;
        top: 0.5rem;
        right: 0.5rem;
    }
}