/* ==========================================
   爆发富论坛 - 帮助中心页面样式
   ========================================== */

/* 帮助头部 */
.help-header {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: #fff;
    padding: 48px 0;
    text-align: center;
}

.help-header h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.help-header p {
    font-size: 1rem;
    opacity: 0.9;
}

/* 帮助容器 */
.help-container {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 32px;
    padding: 32px 20px;
}

/* 侧边栏导航 */
.help-sidebar {
    position: sticky;
    top: 100px;
    height: fit-content;
}

.sidebar-nav {
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    padding: 20px;
    box-shadow: var(--shadow-sm);
}

.sidebar-nav h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-nav ul li {
    margin-bottom: 4px;
}

.sidebar-nav ul a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.9375rem;
    transition: all var(--transition-fast);
}

.sidebar-nav ul a:hover,
.sidebar-nav ul a.active {
    background: var(--primary-light);
    color: var(--primary-color);
}

.sidebar-nav ul a i {
    width: 20px;
    text-align: center;
}

/* 帮助内容 */
.help-content {
    display: flex;
    flex-direction: column;
    gap: 48px;
}

.help-section {
    scroll-margin-top: 100px;
}

.help-section h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-primary);
}

.help-section h2 i {
    color: var(--primary-color);
}

/* 快速入门卡片 */
.help-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.help-card {
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    padding: 28px;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.help-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.card-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-sm);
    background: var(--primary-light);
    color: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 16px;
}

.help-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.help-card p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.6;
}

/* FAQ列表 */
.faq-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.faq-item {
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 24px;
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
    text-align: left;
    transition: background var(--transition-fast);
}

.faq-question:hover {
    background: var(--bg-secondary);
}

.faq-question i {
    color: var(--text-muted);
    transition: transform var(--transition-fast);
}

.faq-question[aria-expanded="true"] i {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal), padding var(--transition-normal);
}

.faq-answer.active {
    max-height: 500px;
    padding: 0 24px 18px;
}

.faq-answer p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.7;
}

/* 专家解读 */
.guide-content {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.guide-article {
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    padding: 28px;
    box-shadow: var(--shadow-sm);
}

.guide-article h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.guide-article p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.8;
    margin-bottom: 16px;
}

.guide-article ul {
    list-style: none;
    padding: 0;
}

.guide-article ul li {
    padding: 8px 0;
    padding-left: 24px;
    position: relative;
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.6;
}

.guide-article ul li::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 16px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--primary-color);
}

.guide-article ul li strong {
    color: var(--text-primary);
}

/* 多平台同步 */
.sync-guide {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.sync-platform {
    display: flex;
    gap: 24px;
    padding: 28px;
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.platform-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-sm);
    background: var(--primary-light);
    color: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    flex-shrink: 0;
}

.platform-info h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.platform-info p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.7;
    margin-bottom: 12px;
}

.platform-info ul {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
}

.platform-info ul li {
    color: var(--text-secondary);
    font-size: 0.875rem;
    padding-left: 16px;
    position: relative;
}

.platform-info ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--secondary-color);
    font-weight: 600;
}

/* 数据下载 */
.download-guide {
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    padding: 28px;
    box-shadow: var(--shadow-sm);
}

.download-guide > p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.7;
    margin-bottom: 24px;
}

.download-formats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 28px;
}

.format-card {
    text-align: center;
    padding: 24px;
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    transition: transform var(--transition-normal);
}

.format-card:hover {
    transform: translateY(-4px);
}

.format-card i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 12px;
}

.format-card h3 {
    font-size: 1.0625rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.format-card p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.6;
}

.download-notice {
    padding: 20px;
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
}

.download-notice h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.download-notice ul li {
    color: var(--text-secondary);
    font-size: 0.875rem;
    padding: 4px 0;
    padding-left: 20px;
    position: relative;
}

.download-notice ul li::before {
    content: '•';
    position: absolute;
    left: 6px;
    color: var(--primary-color);
}

/* 反馈表单 */
.feedback-form {
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    padding: 28px;
    box-shadow: var(--shadow-sm);
}

.feedback-form > p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.7;
    margin-bottom: 24px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 0.9375rem;
    transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.btn-submit {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 32px;
    background: var(--primary-color);
    color: #fff;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 500;
    transition: background var(--transition-fast);
}

.btn-submit:hover {
    background: var(--primary-dark);
}

/* 联系信息 */
.contact-info {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.contact-item {
    display: flex;
    gap: 16px;
    padding: 24px;
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.contact-item i {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    background: var(--primary-light);
    color: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.contact-item h3 {
    font-size: 1.0625rem;
    font-weight: 600;
    margin-bottom: 6px;
}

.contact-item p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

.contact-item small {
    color: var(--text-muted);
    font-size: 0.8125rem;
}

/* 响应式 */
@media screen and (max-width: 1199px) {
    .help-container {
        grid-template-columns: 220px 1fr;
        gap: 24px;
    }
    
    .help-cards {
        grid-template-columns: 1fr;
    }
    
    .download-formats {
        grid-template-columns: 1fr;
    }
    
    .contact-info {
        grid-template-columns: 1fr;
    }
}

@media screen and (max-width: 991px) {
    .help-container {
        grid-template-columns: 1fr;
    }
    
    .help-sidebar {
        position: static;
    }
    
    .sidebar-nav ul {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
    }
    
    .sidebar-nav ul li {
        margin-bottom: 0;
    }
    
    .sidebar-nav ul a {
        white-space: nowrap;
    }
    
    .sync-platform {
        flex-direction: column;
        gap: 16px;
    }
    
    .platform-info ul {
        grid-template-columns: 1fr;
    }
}

@media screen and (max-width: 767px) {
    .help-header h1 {
        font-size: 1.5rem;
    }
    
    .help-section h2 {
        font-size: 1.25rem;
    }
    
    .help-card {
        padding: 20px;
    }
    
    .faq-question {
        padding: 14px 20px;
        font-size: 0.9375rem;
    }
    
    .faq-answer.active {
        padding: 0 20px 14px;
    }
    
    .guide-article {
        padding: 20px;
    }
    
    .feedback-form {
        padding: 20px;
    }
    
    .contact-item {
        padding: 20px;
    }
}

@media screen and (max-width: 479px) {
    .help-header {
        padding: 32px 0;
    }
    
    .help-header h1 {
        font-size: 1.25rem;
    }
    
    .help-container {
        padding: 20px 16px;
    }
    
    .help-section {
        scroll-margin-top: 80px;
    }
    
    .sidebar-nav {
        padding: 16px;
    }
    
    .help-card {
        padding: 16px;
    }
    
    .card-icon {
        width: 48px;
        height: 48px;
        font-size: 1.25rem;
    }
    
    .guide-article {
        padding: 16px;
    }
    
    .guide-article h3 {
        font-size: 1.125rem;
    }
    
    .sync-platform {
        padding: 20px;
    }
    
    .platform-icon {
        width: 48px;
        height: 48px;
        font-size: 1.25rem;
    }
    
    .download-guide {
        padding: 20px;
    }
    
    .feedback-form {
        padding: 16px;
    }
    
    .btn-submit {
        width: 100%;
        justify-content: center;
    }
    
    .contact-item {
        padding: 16px;
    }
}