.container {margin-bottom: .5rem;}
.knowledge-center {
    padding: 60px 0;
    background-color: #222533;
    min-height: 80vh;
}
.page-header {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    margin-bottom: 24px;
}
.page-title {
    margin: 0;
    color: #E8F2FF;
    font-weight: 700;
    line-height: 1.25;
    letter-spacing: 0.2px;
    font-size: clamp(22px, 3.0vw, 32px);
}
.page-description {
    margin: 0;
    color: #AEB4C0;
    line-height: 1.7;
    font-size: clamp(13.5px, 1.6vw, 16px);
    max-width: 72ch;
    opacity: 0.95;
    text-wrap: balance;
}
.breadcrumb-nav {
    background: transparent;
    padding: 0;
    margin-bottom: 20px;
}
.breadcrumb-nav .breadcrumb {
    background: rgba(255,255,255,0.1);
    border-radius: 8px;
    padding: 10px 16px;
    margin-bottom: 0;
}
.breadcrumb-nav .breadcrumb > li + li:before {
    content: "/";
    color: #00A2FF;
}
.breadcrumb-nav .breadcrumb a {
    color: #00A2FF;
    text-decoration: none;
}
.breadcrumb-nav .breadcrumb .active {
    color: #FFFFFF;
}
.content-layout {
    display: flex;
    gap: 25px;
}
.faq-main {
    flex: 1;
    background: rgba(255,255,255,0.05);
    border: 1px solid #404556;
    border-radius: 12px;
    padding: 25px;
}
.faq-body {
    color: #CCCCCC;
    line-height: 1.8;
    font-size: 15px;
}
.faq-body h2,
.faq-body h3,
.faq-body h4 {
    color: #FFFFFF;
    margin-top: 18px;
    margin-bottom: 8px;
}
.faq-body p {
    margin-bottom: 10px;
}
.faq-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 20px;
    font-size: 13px;
    color: #999999;
}
.sidebar-nav {
    flex: 0 0 280px;
    background: transparent;
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.sidebar-card {
    background: rgba(255,255,255,0.05);
    border: 1px solid #404556;
    border-radius: 12px;
    padding: 18px 16px;
}
.sidebar-card-title {
    font-size: 0.18rem;
    color: #FFFFFF;
    font-weight: 600;
    margin-bottom: 10px;
}
.sidebar-card p {
    color: #CCCCCC;
    font-size: 14px;
    line-height: 1.6;
    margin-bottom: 8px;
}
.recommend-tool-media {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
}
.recommend-tool-media img {
    width: 48px;
    height: 48px;
}
.recommend-tool-name {
    color: #FFFFFF;
    font-weight: 600;
    font-size: 15px;
}
.recommend-tool-desc {
    color: #AEB4C0;
    font-size: 13px;
}
.btn-primary-download {
    display: inline-block;
    background: #00A2FF;
    border-radius: 6px;
    color: #FFFFFF;
    padding: 8px 14px;
    font-size: 14px;
    text-decoration: none;
    margin-top: 4px;
}
.btn-primary-download:hover {
    background: #0094f0;
}
.related-list {
    list-style: none;
    padding-left: 0;
    margin: 0;
}
.related-list li {
    margin-bottom: 6px;
}
.related-list a {
    color: #CCCCCC;
    font-size: 14px;
    text-decoration: none;
}
.related-list a:hover {
    color: #00A2FF;
}
@media (max-width: 1024px) {
    .content-layout {
        flex-direction: column;
    }
    .sidebar-nav {
        flex: none;
    }
}