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function qipao() {
$('#page-header').circleMagic({
radius: 10,
density: .2,
color: 'rgba(255,255,255,.4)',
clearOffset: 0.99
});
}! function(p) {
p.fn.circleMagic = function(t) {
var o, a, n, r, e = !0,
i = [],
d = p.extend({ color: "rgba(255,0,0,.5)", radius: 10, density: .3, clearOffset: .2 }, t),
l = this[0];
function c() { e = !(document.body.scrollTop > a) }
function s() { o = l.clientWidth, a = l.clientHeight, l.height = a + "px", n.width = o, n.height = a }
function h() {
if (e)
for (var t in r.clearRect(0, 0, o, a), i) i[t].draw();
requestAnimationFrame(h)
}
function f() {
var t = this;
function e() { t.pos.x = Math.random() * o, t.pos.y = a + 100 * Math.random(), t.alpha = .1 + Math.random() * d.clearOffset, t.scale = .1 + .3 * Math.random(), t.speed = Math.random(), "random" === d.color ? t.color = "rgba(" + Math.floor(255 * Math.random()) + ", " + Math.floor(0 * Math.random()) + ", " + Math.floor(0 * Math.random()) + ", " + Math.random().toPrecision(2) + ")" : t.color = d.color }
t.pos = {}, e(), this.draw = function() { t.alpha <= 0 && e(), t.pos.y -= t.speed, t.alpha -= 5e-4, r.beginPath(), r.arc(t.pos.x, t.pos.y, t.scale * d.radius, 0, 2 * Math.PI, !1), r.fillStyle = t.color, r.fill(), r.closePath() }
}! function() {
o = l.offsetWidth, a = l.offsetHeight,
function() {
var t = document.createElement("canvas");
t.id = "canvas", t.style.top = 0, t.style.zIndex = 0, t.style.position = "absolute", l.appendChild(t), t.parentElement.style.overflow = "hidden"
}(), (n = document.getElementById("canvas")).width = o, n.height = a, r = n.getContext("2d");
for (var t = 0; t < o * d.density; t++) {
var e = new f;
i.push(e)
}
h()
}(), window.addEventListener("scroll", c, !1), window.addEventListener("resize", s, !1)
}
}(jQuery);
qipao();
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