/* 联系表单基础样式 */
.contact-form {
    max-width: 600px;
    margin: 0 auto;
    padding: 2rem;
    background-color: #f8f9fa;
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.contact-form h2 {
    margin-bottom: 1.5rem;
    color: #333;
    font-size: 1.75rem;
    font-weight: 600;
    text-align: center;
}

.contact-form p {
    margin-bottom: 2rem;
    color: #666;
    text-align: center;
}

/* 表单组样式 */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #333;
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background-color: #fff;
}

.form-control:focus {
    outline: none;
    border-color: #007bff;
    box-shadow: 0 0 0 4px rgba(0, 123, 255, 0.1);
    transform: translateY(-1px);
}

.form-control::placeholder {
    color: #999;
}

/* 错误状态样式 */
.form-control.error {
    border-color: #dc3545;
    box-shadow: 0 0 0 4px rgba(220, 53, 69, 0.1);
}

.field-error {
    margin-top: 0.25rem;
    font-size: 0.875rem;
    color: #dc3545;
    transition: all 0.3s ease;
}

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

/* 提交按钮样式 */
.submit-btn {
    display: inline-block;
    width: 100%;
    padding: 0.75rem 1.5rem;
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
}

.submit-btn:hover:not(:disabled) {
    background-color: #0056b3;
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 123, 255, 0.3);
}

.submit-btn:active:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 123, 255, 0.25);
}

.submit-btn:disabled {
    background-color: #6c757d;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* 表单消息样式 */
.form-success-message,
.form-error-message {
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    text-align: center;
    opacity: 0;
    transform: translateY(10px);
    transition: all 0.3s ease;
    position: relative;
}

.form-success-message.show,
.form-error-message.show {
    opacity: 1;
    transform: translateY(0);
}

.form-success-message {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.form-error-message {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.form-success-message i,
.form-error-message i {
    margin-right: 0.5rem;
    font-size: 1.125rem;
}

/* 字符计数器样式 */
.char-counter {
    text-align: right;
    font-size: 0.875rem;
    color: #666;
    margin-top: 0.25rem;
    transition: color 0.3s ease;
}

/* 输入建议样式 */
.suggestions-container {
    background-color: white;
    border: 1px solid #ddd;
    border-radius: 8px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
    max-height: 200px;
    overflow-y: auto;
    z-index: 1000;
}

.suggestion-item {
    padding: 0.75rem 1rem;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.suggestion-item:hover {
    background-color: #f8f9fa;
}

.suggestion-item:first-child {
    border-radius: 8px 8px 0 0;
}

.suggestion-item:last-child {
    border-radius: 0 0 8px 8px;
}

/* 表单布局增强 */
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

/* 表单复选框和单选框样式 */
.checkbox-group,
.radio-group {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 0.5rem;
}

.checkbox-item,
.radio-item {
    display: flex;
    align-items: center;
    cursor: pointer;
}

.checkbox-item input,
.radio-item input {
    margin-right: 0.5rem;
}

.checkbox-item label,
.radio-item label {
    margin: 0;
    cursor: pointer;
    font-weight: normal;
}

/* 表单提交状态样式 */
.loading-spinner {
    display: inline-block;
    width: 1rem;
    height: 1rem;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
    margin-right: 0.5rem;
}

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

/* 深色模式适配 */
[data-theme="dark"] .contact-form {
    background-color: var(--bg-secondary-color);
    color: var(--text-color);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] .contact-form h2 {
    color: var(--text-color);
}

[data-theme="dark"] .contact-form p {
    color: var(--text-secondary-color);
}

[data-theme="dark"] .form-group label {
    color: var(--text-color);
}

[data-theme="dark"] .form-control {
    background-color: var(--bg-color);
    color: var(--text-color);
    border-color: var(--border-color);
}

[data-theme="dark"] .form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(77, 171, 247, 0.1);
}

[data-theme="dark"] .form-control::placeholder {
    color: var(--text-secondary-color);
}

[data-theme="dark"] .form-control.error {
    border-color: var(--error-color);
    box-shadow: 0 0 0 4px rgba(225, 112, 85, 0.1);
}

[data-theme="dark"] .field-error {
    color: var(--error-color);
}

[data-theme="dark"] .submit-btn {
    background-color: var(--primary-color);
}

[data-theme="dark"] .submit-btn:hover:not(:disabled) {
    background-color: var(--hover-color);
    box-shadow: 0 6px 16px rgba(77, 171, 247, 0.3);
}

[data-theme="dark"] .submit-btn:active:not(:disabled) {
    box-shadow: 0 4px 12px rgba(77, 171, 247, 0.25);
}

[data-theme="dark"] .form-success-message {
    background-color: rgba(0, 184, 148, 0.1);
    color: var(--success-color);
    border-color: rgba(0, 184, 148, 0.3);
}

[data-theme="dark"] .form-error-message {
    background-color: rgba(225, 112, 85, 0.1);
    color: var(--error-color);
    border-color: rgba(225, 112, 85, 0.3);
}

[data-theme="dark"] .char-counter {
    color: var(--text-secondary-color);
}

[data-theme="dark"] .suggestions-container {
    background-color: var(--bg-color);
    border-color: var(--border-color);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .suggestion-item {
    color: var(--text-color);
}

[data-theme="dark"] .suggestion-item:hover {
    background-color: rgba(255, 255, 255, 0.05);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .contact-form {
        padding: 1.5rem;
        margin: 0 1rem;
    }
    
    .contact-form h2 {
        font-size: 1.5rem;
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .form-control {
        padding: 0.625rem 0.875rem;
        font-size: 0.9375rem;
    }
    
    .submit-btn {
        padding: 0.625rem 1.25rem;
        font-size: 0.9375rem;
    }
}

@media (max-width: 480px) {
    .contact-form {
        padding: 1.25rem;
        margin: 0 0.75rem;
    }
    
    .contact-form h2 {
        font-size: 1.375rem;
    }
    
    .checkbox-group,
    .radio-group {
        flex-direction: column;
        gap: 0.75rem;
    }
}

/* 打印样式 */
@media print {
    .contact-form {
        box-shadow: none;
        border: 1px solid #ddd;
    }
    
    .submit-btn {
        display: none;
    }
    
    .form-success-message,
    .form-error-message,
    .field-error,
    .char-counter,
    .suggestions-container {
        display: none;
    }
}