.sp-nav{position:fixed;top:0;left:0;right:0;z-index:1000;background:var(--bg-secondary);border-bottom:1px solid var(--border);padding:0 24px;}
.sp-nav-inner{max-width:900px;margin:0 auto;height:56px;display:flex;align-items:center;justify-content:space-between;}
.sp-nav-logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:15px;}
.sp-nav-logo-icon{width:32px;height:32px;object-fit:contain;}
.sp-nav-logo span{color:var(--accent);}
.sp-nav-back{font-size:13px;font-weight:600;color:var(--text-secondary);display:flex;align-items:center;gap:6px;transition:color .15s;}
.sp-nav-back:hover{color:var(--accent);}
.sp-nav-back svg{width:18px;height:18px;}