yandex修改，页面样式调整

app/static/js/pages/footer.js

@@ -5,4 +5,41 @@
       window.scrollTo({ top: 0, behavior: "smooth" });
     });
   });
+
+  // 页脚进入视口后，把悬浮按钮（下载 App / 回到顶部）顶到页脚上方，避免遮住页脚内容。
+  var footers = document.querySelectorAll(".footer-box, .home-mobile-footer");
+  if (!footers.length) return;
+  var root = document.documentElement;
+  var ticking = false;
+  var lastLift = -1;
+
+  function visibleFooter() {
+    for (var i = 0; i < footers.length; i++) {
+      if (footers[i].offsetHeight > 0) return footers[i];
+    }
+    return null;
+  }
+
+  function update() {
+    ticking = false;
+    var footer = visibleFooter();
+    var lift = 0;
+    if (footer) {
+      var top = footer.getBoundingClientRect().top;
+      lift = Math.max(0, Math.round((window.innerHeight || 0) - top));
+    }
+    if (lift === lastLift) return;
+    lastLift = lift;
+    root.style.setProperty("--footer-lift", lift + "px");
+  }
+
+  function schedule() {
+    if (ticking) return;
+    ticking = true;
+    window.requestAnimationFrame(update);
+  }
+
+  window.addEventListener("scroll", schedule, { passive: true });
+  window.addEventListener("resize", schedule);
+  schedule();
 })();