/* 文章页面与右侧导航统一样式 */
:root {
    --primary-color: #7c3aed; /* 紫色 */
    --primary-hover: #5b21b6; /* 深紫 */
    --accent-color: #ff9800; /* 橙色 */
    --accent-hover: #e65100; /* 深橙 */
    --sidebar-bg: #fff;
    --sidebar-border: #e6e6e6;
    --sidebar-text: #333;
    --sidebar-muted: #666;
    --sidebar-active-bg: #f3e8ff; /* 淡紫背景 */
    --sidebar-active-text: #7c3aed;
}

.article-layout {
    display: flex;
    align-items: flex-start;
    gap: 32px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    position: relative;
    box-sizing: border-box;
}

.main-content {
    flex: 1 1 0%;
    min-width: 600px;
    max-width: calc(100% - 312px);
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.08);
    padding: 30px;
    box-sizing: border-box;
    order: 1;
}

.sidebar-navigation {
    width: 280px;
    flex-shrink: 0;
    background: var(--sidebar-bg);
    border-radius: 20px 20px 12px 12px;
    box-shadow: 0 2px 16px rgba(124,58,237,0.08);
    padding: 24px 20px 20px 20px;
    height: fit-content;
    position: sticky;
    top: 100px;
    order: 2;
    align-self: flex-start;
    z-index: 2;
    border: 1px solid var(--sidebar-border);
    transition: box-shadow 0.3s;
}

/* 滚动时固定在右侧 */
.sidebar-navigation.fixed {
    position: fixed;
    top: 80px;
    right: calc((100vw - 1200px)/2);
    left: auto;
    margin-left: 0;
    z-index: 100;
}

.sidebar-navigation.bottom {
    position: absolute;
    top: auto;
    bottom: 0;
    right: 0;
    left: auto;
}

.sidebar-header {
    background: linear-gradient(90deg, #ff9800 0%, #ffb74d 100%);
    border-radius: 20px 20px 0 0;
    padding: 18px 0 12px 0;
    margin: -24px -20px 20px -20px;
    text-align: center;
    box-shadow: 0 2px 8px rgba(255,152,0,0.08);
    border-bottom: none;
}

.sidebar-header h3 {
    color: #fff;
    font-size: 1.2em;
    font-weight: bold;
    letter-spacing: 2px;
    margin: 0;
    text-shadow: 0 2px 8px rgba(255,152,0,0.12);
}

.sidebar-menu {
    list-style: none;
    padding: 0;
    margin: 0;
}

.nav-group {
    margin-bottom: 10px;
    border-bottom: 1px solid var(--sidebar-border);
}

.nav-group-toggle {
    display: flex;
    align-items: center;
    padding: 15px 20px;
    color: var(--sidebar-text);
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.3s ease;
    font-weight: 500;
    font-size: 15px;
    cursor: pointer;
    background: transparent;
}

.nav-group-toggle i {
    margin-right: 10px;
    color: var(--primary-color);
    font-size: 1.1em;
    transition: color 0.2s;
}

.nav-group-toggle:hover {
    background: var(--sidebar-active-bg);
    color: var(--primary-color);
}

.nav-group.active > .nav-group-toggle {
    color: var(--primary-color);
    background: var(--sidebar-active-bg);
    font-weight: 600;
}

.nav-group.active > .nav-group-toggle i {
    color: var(--accent-color);
}

.nav-submenu {
    list-style: none;
    padding: 0;
    margin: 0;
    background: transparent;
    display: none;
}

.nav-group.active .nav-submenu {
    display: block;
}

.nav-submenu li a {
    display: block;
    padding: 12px 20px 12px 50px;
    color: var(--sidebar-muted);
    text-decoration: none;
    transition: all 0.3s ease;
    border-radius: 6px;
    font-size: 14px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.nav-submenu li.active a,
.nav-submenu li a.active {
    color: var(--accent-color);
    background: #fff3e0;
    font-weight: 600;
}

.nav-submenu li a:hover {
    background: #fff3e0;
    color: var(--accent-color);
}

/* 美化常见问题、关于我们为主色按钮 */
.sidebar-menu > li > a {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 0 12px 18px;
    margin: 10px 0 0 0;
    color: #fff;
    background: var(--primary-color);
    border-radius: 8px;
    font-weight: 600;
    font-size: 15px;
    transition: background 0.2s, color 0.2s;
    text-decoration: none;
    position: relative;
}
.sidebar-menu > li > a i {
    font-size: 1.1em;
    color: #fff;
}
.sidebar-menu > li > a:hover {
    background: var(--accent-color);
    color: #fff;
}
.sidebar-menu > li > a:hover i {
    color: #fff;
}

/* 只针对常见问题、关于我们按钮特殊高亮 */
.sidebar-menu > li > a[href*="faq"],
.sidebar-menu > li > a[href*="about"] {
    background: var(--accent-color);
    color: #fff;
    margin-top: 18px;
    margin-bottom: 6px;
    box-shadow: 0 2px 8px rgba(255,152,0,0.08);
}
.sidebar-menu > li > a[href*="faq"]:hover,
.sidebar-menu > li > a[href*="about"]:hover {
    background: var(--primary-color);
    color: #fff;
}

/* 文章列表 */
.article-list {
    margin-bottom: 40px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.article-item {
    background: #fff;
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

.article-item:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    transform: translateY(-2px);
}

.article-title {
    margin: 0 0 15px;
    font-size: 20px;
    color: #333;
}

.article-meta {
    margin-bottom: 15px;
    color: #666;
    font-size: 14px;
    display: flex;
    gap: 20px;
}

.article-meta span {
    margin-right: 20px;
}

.article-desc {
    color: #666;
    line-height: 1.6;
    margin: 0;
}

/* 分页 */
.pagination {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 30px;
}

.page-link {
    display: inline-block;
    padding: 8px 16px;
    color: #666;
    text-decoration: none;
    border: 1px solid #ddd;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.page-link:hover,
.page-link.active {
    background: var(--primary-color);
    color: #fff;
    border-color: var(--primary-color);
}

/* 文章详情 */
.article-detail {
    background: #fff;
    border-radius: 8px;
    padding: 30px;
    /*box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);*/
}

.article-content h2 {
    margin: 30px 0 20px;
    font-size: 24px;
    color: #333;
}

.article-content p {
    color: #666;
    line-height: 1.8;
    margin-bottom: 20px;
}

.article-content ul {
    padding-left: 20px;
    margin-bottom: 20px;
}

.article-content li {
    color: #666;
    line-height: 1.8;
    margin-bottom: 10px;
}

/* 侧边栏CTA */
.sidebar-cta {
    margin-top: 30px;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 8px;
    text-align: center;
}

.sidebar-cta h4 {
    margin: 0 0 10px;
    font-size: 16px;
    color: #333;
}

.sidebar-cta p {
    margin: 0 0 15px;
    font-size: 14px;
    color: #666;
}

.sidebar-cta-btn {
    display: inline-block;
    padding: 10px 20px;
    background: var(--primary-color);
    color: #fff;
    text-decoration: none;
    border-radius: 4px;
    transition: all 0.3s ease;
    text-align: center;
}

.sidebar-cta-btn:hover {
    background: var(--accent-color);
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .article-layout {
        flex-direction: column;
        padding: 20px;
    }
    .main-content {
        max-width: 100%;
        min-width: 0;
    }
    .sidebar-navigation {
        width: 100%;
        position: relative;
        top: 0;
        max-height: none;
        order: 2;
        margin-bottom: 20px;
    }
}

@media (max-width: 768px) {
    .article-title {
        font-size: 1.2rem;
    }
    .article-content h2 {
        font-size: 1.1rem;
    }
    .article-item {
        padding: 15px;
    }
    .article-detail {
        padding: 15px;
    }
    .sidebar-navigation {
        display: none !important;
    }
}