(function(){
  var path = (location.pathname || "/").replace(/\/index\.html$/, "/").replace(/\/$/, "") || "/";
  var links = [
    { href:"/", label:"首頁" },
    { href:"/pricing", label:"收費方式" },
    { href:"/payment", label:"付款說明" },
    { href:"/terms", label:"服務條款" },
    { href:"/privacy", label:"隱私權" },
    { href:"/refund", label:"退款政策" },
    { href:"/contact", label:"聯絡我們" }
  ];
  var nav = document.getElementById("siteNav");
  if(!nav) return;
  nav.innerHTML = links.map(function(l){
    var active = (l.href === "/" && path === "/") || (l.href !== "/" && path === l.href);
    return '<a href="'+l.href+'"'+(active?' class="active"':'')+'>'+l.label+'</a>';
  }).join("");
})();