/* 表单样式增强 */

/* 表单容器样式 */
.form-container {
    max-width: 500px;
    margin: 0 auto;
    padding: 2rem;
}

/* 表单字段组样式 */
.form-group {
    position: relative;
    margin-bottom: 1.5rem;
}

/* 输入框基础样式 */
.form-input, .form-textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid #e5e7eb;
    border-radius: 0.5rem;
    font-size: 1rem;
    transition: all 0.3s ease;
    background-color: #ffffff;
}

/* 输入框聚焦状态 */
.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: #1E40AF;
    box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.1);
    transform: translateY(-1px);
}

/* 输入框错误状态 */
.form-input.error,
.form-textarea.error {
    border-color: #DC2626;
}

/* 输入框成功状态 */
.form-input.success,
.form-textarea.success {
    border-color: #059669;
}

/* 标签样式 */
.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #374151;
    transition: color 0.3s ease;
}

/* 带图标的输入框 */
.input-with-icon {
    position: relative;
}

.input-with-icon input,
.input-with-icon textarea {
    padding-left: 2.5rem;
}

.input-icon {
    position: absolute;
    left: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    color: #9CA3AF;
    pointer-events: none;
    transition: color 0.3s ease;
}

/* 输入框聚焦时图标颜色变化 */
.input-with-icon input:focus + .input-icon,
.input-with-icon textarea:focus + .input-icon {
    color: #1E40AF;
}

/* 文本区域样式 */
.form-textarea {
    resize: vertical;
    min-height: 120px;
}

/* 复选框样式 */
.form-checkbox {
    width: 1.25rem;
    height: 1.25rem;
    border: 2px solid #D1D5DB;
    border-radius: 0.375rem;
    transition: all 0.3s ease;
    cursor: pointer;
}

.form-checkbox:checked {
    background-color: #1E40AF;
    border-color: #1E40AF;
}

.form-checkbox:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.1);
}

/* 按钮样式增强 */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    color: #FFFFFF;
    background-color: #1E40AF;
    border: none;
    border-radius: 0.5rem;
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.btn-primary:hover {
    background-color: #1E40AF;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    transform: translateY(-2px);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
}

.btn-primary:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

/* 按钮悬停动画效果 */
.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: all 0.6s ease;
}

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

/* 加载动画 */
.loading-spinner {
    display: inline-block;
    width: 1rem;
    height: 1rem;
    border: 2px solid #ffffff;
    border-radius: 50%;
    border-top-color: transparent;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* 表单反馈消息样式 */
.form-feedback {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: 0.5rem;
    text-align: center;
    transition: all 0.3s ease;
}

.feedback-success {
    background-color: rgba(5, 150, 105, 0.1);
    border: 1px solid rgba(5, 150, 105, 0.3);
    color: #059669;
}

.feedback-error {
    background-color: rgba(220, 38, 38, 0.1);
    border: 1px solid rgba(220, 38, 38, 0.3);
    color: #DC2626;
}

/* 字符计数样式 */
.char-count {
    font-size: 0.875rem;
    color: #9CA3AF;
    text-align: right;
    margin-top: 0.25rem;
    transition: color 0.3s ease;
}

.char-count.limit {
    color: #DC2626;
}

/* 响应式设计适配 */
@media (max-width: 640px) {
    .form-container {
        padding: 1rem;
    }
    
    .form-input, .form-textarea {
        padding: 0.625rem 0.75rem;
    }
    
    .btn-primary {
        padding: 0.625rem 1rem;
        width: 100%;
    }
}

/* 表单动画效果 */
.form-input,
.form-textarea,
.form-checkbox,
.btn-primary {
    will-change: transform, box-shadow;
}

/* 输入框标签浮动效果 */
.floating-label {
    position: absolute;
    left: 1rem;
    top: 0.75rem;
    color: #9CA3AF;
    background-color: #FFFFFF;
    padding: 0 0.25rem;
    font-size: 0.875rem;
    transition: all 0.3s ease;
    pointer-events: none;
}

.form-input:focus + .floating-label,
.form-input:not(:placeholder-shown) + .floating-label {
    top: -0.5rem;
    left: 0.75rem;
    font-size: 0.75rem;
    color: #1E40AF;
}

/* 表单提交状态指示器 */
.submission-status {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 1rem;
    padding: 1rem;
    border-radius: 0.5rem;
    font-size: 0.875rem;
}

.submission-status.pending {
    background-color: rgba(59, 130, 246, 0.1);
    color: #3B82F6;
}

.submission-status.success {
    background-color: rgba(5, 150, 105, 0.1);
    color: #059669;
}

.submission-status.error {
    background-color: rgba(220, 38, 38, 0.1);
    color: #DC2626;
}

/* 协议复选框标签样式 */
.agreement-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: #4B5563;
    cursor: pointer;
    transition: color 0.3s ease;
}

.agreement-label:hover {
    color: #1F2937;
}

.agreement-link {
    color: #1E40AF;
    text-decoration: none;
    transition: color 0.3s ease;
}

.agreement-link:hover {
    color: #059669;
    text-decoration: underline;
}

/* 表单阴影效果 */
.form-card {
    background-color: #FFFFFF;
    border-radius: 1rem;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.form-card:hover {
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    transform: translateY(-2px);
}

/* 渐变背景装饰 */
.gradient-bg {
    background: linear-gradient(135deg, #1E40AF 0%, #059669 100%);
    color: #FFFFFF;
    padding: 1.5rem;
    border-radius: 1rem 1rem 0 0;
}

/* 表单动画序列 */
@keyframes formSlideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.form-animate-in {
    animation: formSlideIn 0.5s ease forwards;
}

/* 输入框平滑过渡 */
.smooth-input {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 表单焦点状态增强 */
.focus-visible {
    outline: 2px solid #1E40AF;
    outline-offset: 2px;
}

/* 触摸设备优化 */
@media (hover: none) and (pointer: coarse) {
    .btn-primary:hover {
        transform: none;
    }
    
    .form-card:hover {
        transform: none;
    }
}