/* head_51.css - fold nav (odd template) */

.__PFX__-h51-wrap{
    padding:10px 12px 8px;
    background:radial-gradient(circle at top,var(--grad-start),var(--bg-color));
    border-bottom:1px solid var(--border-color);
}

.__PFX__-h51-top{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:8px;
}

.__PFX__-h51-title{
    font-size:18px;
    font-weight:700;
    color:var(--text_primary,#111827);
    text-decoration:none;
}

.__PFX__-h51-menu{
    width:32px;
    height:32px;
    border-radius:999px;
    border:1px solid var(--border-color);
    background:rgba(255,255,255,.7);
    cursor:pointer;
}

.__PFX__-h51-search{
    margin-top:6px;
    display:flex;
    background:#fff;
    border-radius:999px;
    border:1px solid var(--border-color);
    padding:3px 4px 3px 10px;
}

.__PFX__-h51-search input{
    flex:1;
    border:none;
    font-size:13px;
    background:transparent;
    outline:none;
}

.__PFX__-h51-sbtn{
    min-width:50px;
    border:none;
    border-radius:999px;
    background:var(--primary-color);
    color:#fff;
    font-size:13px;
    cursor:pointer;
}

.__PFX__-h51-nav{
    margin-top:4px;
}

.__PFX__-h51-links a{
    display:inline-block;
    margin:3px 6px 0 0;
    padding:3px 8px;
    font-size:12px;
    border-radius:6px;
    background:rgba(255,255,255,.85);
    color:var(--text_primary,#111827);
    text-decoration:none;
    border:1px solid rgba(0,0,0,.03);
}

.__PFX__-h51-links a.active{
    background:var(--primary-color);
    color:#fff;
    border-color:var(--primary-color);
}

/* 关键：折叠菜单行为
   - 移动端：默认隐藏 nav；点按钮切换 body class 显示
   - PC 端：nav 常驻显示；按钮隐藏（避免“按钮存在但无意义”） */

@media (max-width: 860px){
    .__PFX__-h51-nav{
        display:none;
    }
    body.__PFX__-h51-open .__PFX__-h51-nav{
        display:block;
    }
}

@media (min-width: 861px){
    .__PFX__-h51-menu{
        display:none;
    }
}