/* ==========================================
   青龙论坛 - 使用帮助样式
   版本: 1.0.0
   更新日期: 2026-05-07
   ========================================== */

/* 页面标题 */
.page-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    padding: 4rem 0 3rem;
    margin-top: -1rem;
}

.page-header h1 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 0.75rem;
}

.page-header p {
    font-size: 1.125rem;
    opacity: 0.9;
    margin-bottom: 0;
}

.date-display {
    display: inline-flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.15);
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 500;
}

/* 帮助区域 */
.help-section {
    padding: 3rem 0 5rem;
    background: var(--body-bg);
}

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

.help-nav {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.help-nav h3 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
    color: var(--text-primary);
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--border-color);
}

.help-nav .nav-link {
    display: flex;
    align-items: center;
    padding: 0.75rem 1rem;
    color: var(--text-secondary);
    border-radius: 8px;
    font-weight: 500;
    transition: var(--transition);
    margin-bottom: 0.25rem;
}

.help-nav .nav-link:hover {
    background: var(--light-color);
    color: var(--primary-color);
}

.help-nav .nav-link.active {
    background: linear-gradient(135deg, var(--primary-color), #764ba2);
    color: #fff;
}

.help-nav .nav-link i {
    font-size: 1.125rem;
}

/* 帮助内容 */
.help-content {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.help-section-content {
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
}

.help-section-content:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

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

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

.help-item {
    margin-bottom: 1.5rem;
    padding-left: 1rem;
    border-left: 3px solid var(--primary-color);
}

.help-item:last-child {
    margin-bottom: 0;
}

.help-item h4 {
    font-size: 1.0625rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.help-item p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 0;
    font-size: 0.9375rem;
}

/* 手风琴样式 */
.accordion-item {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 0.75rem;
    overflow: hidden;
}

.accordion-item:last-child {
    margin-bottom: 0;
}

.accordion-button {
    padding: 1rem 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    background: var(--light-color);
    border: none;
}

.accordion-button:not(.collapsed) {
    background: linear-gradient(135deg, var(--primary-color), #764ba2);
    color: #fff;
    box-shadow: none;
}

.accordion-button:focus {
    box-shadow: none;
    border-color: transparent;
}

.accordion-button::after {
    filter: invert(0);
}

.accordion-button:not(.collapsed)::after {
    filter: invert(1);
}

.accordion-body {
    padding: 1.25rem;
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 0.9375rem;
}

/* 响应式设计 */
@media (max-width: 991.98px) {
    .page-header {
        padding: 3rem 0 2rem;
    }
    
    .page-header h1 {
        font-size: 2rem;
    }
    
    .help-sidebar {
        position: relative;
        top: 0;
        margin-bottom: 2rem;
    }
    
    .help-nav {
        padding: 1.25rem;
    }
    
    .help-nav .nav {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 0.5rem;
    }
    
    .help-nav .nav-item {
        flex: 1 1 calc(50% - 0.5rem);
    }
    
    .help-content {
        padding: 1.5rem;
    }
}

@media (max-width: 767.98px) {
    .page-header h1 {
        font-size: 1.75rem;
    }
    
    .help-nav .nav-item {
        flex: 1 1 100%;
    }
    
    .help-content {
        padding: 1.25rem;
    }
    
    .help-section-content h2 {
        font-size: 1.25rem;
    }
    
    .help-item {
        padding-left: 0.75rem;
    }
}