.help-doc-header {
    position: sticky;
    top: 0;
    z-index: 50;
    display: flex;
    height: 60px;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    border-bottom: 1px solid #e2e8f0;
    background: rgba(255, 255, 255, .9);
    backdrop-filter: blur(12px)
}

.help-doc-header-left,
.help-doc-header-right {
    display: flex;
    align-items: center;
    gap: 14px
}

.help-doc-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #0f172a;
    font-size: 16px;
    font-weight: 700;
    text-decoration: none
}

.help-doc-brand img {
    display: block;
    width: auto;
    height: 31px
}

.help-doc-brand span {
    padding: 2px 10px;
    border-radius: 12px;
    background: #f1f5f9;
    color: #64748b;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: .3px
}

.help-doc-link {
    padding: 6px 10px;
    border-radius: 6px;
    color: #64748b;
    font-size: 14px;
    text-decoration: none
}

.help-doc-link:hover {
    background: #f1f5f9;
    color: #0f172a
}

.help-doc-action {
    padding: 7px 13px;
    border-radius: 6px;
    background: #0f172a;
    color: #fff;
    font-size: 13px;
    font-weight: 600;
    text-decoration: none
}

.help-doc-action:hover {
    background: #334155
}

.help-doc-menu-toggle {
    display: none;
    border: 0;
    background: transparent;
    color: #334155;
    font-size: 20px;
    cursor: pointer
}

.help-detail-simple-layout {
    min-height: calc(100vh - 60px)
}

.help-detail-nav {
    top: 60px;
    height: calc(100vh - 60px)
}

@media(max-width:900px) {
    .help-doc-menu-toggle {
        display: block
    }

    .help-detail-nav {
        display: none
    }

    .help-detail-nav.is-mobile-open {
        display: block
    }

    .help-doc-header {
        padding: 0 16px
    }
}

@media(max-width:600px) {
    .help-doc-header-right {
        gap: 4px
    }

    .help-doc-link {
        display: none
    }

    .help-doc-brand span {
        display: none
    }

    .help-doc-action {
        padding: 7px 10px;
        font-size: 12px
    }
}