My blogger dropdown sub menu disappears on hover - drop-down-menu

Question

I just copies this code from a tutorial, But I try to open sub menu it disappears. I don't know what to do Please help me.
#nav_wrapper1 {
width: 100%;
}
.nav_wrapper {
border-bottom:1px solid white;
left: 0;
top:0;
position:top;
width: 100%;
transition: top .5s ease-out;
background: #170030;
height:60px;
z-index:99999;
}
.btn {
padding: 10px 1%;
margin: 5px;
color: #fff;
text-decoration: none;
font-family: normal;
transition: all 0.1s ease;
}
.btn:hover {
transition: all 0.1s ease;
}
#search i {color: #fff;
font-size: 22px;}
#search {
float: right;
font-size: 22px;
padding: 20px 25px;
line-height: 0px;
color: #fff;
margin: 0;
font-weight: 700;
-webkit-transform: rotate(90deg);
-moz-transform: rotate(90deg);
-ms-transform: rotate(90deg);
-o-transform: rotate(90deg);
transform: rotate(90deg);
}
#search:hover {
background: #111;
}
.search_box {
clear: both;
width: 40%;
background: #111;
padding: 0;
margin: 0;
height: 0;
overflow: hidden;
transition: all 0.1s ease-in-out;
float:right;
z-index:99999999999;
}
.search_box.active {
height: auto;
padding: 10px 0;
width:40%;
}
.search_box input {
width: 60%;
font-size: 13px;
margin: 0 0 0 10px;
padding: 10px;
border: none;
background: #fff;
}
.search_box input:focus {
outline: none;
}
.search_box input.search_icon {
clear: both;
width: 30%;
height: auto;
padding: 10px;
margin: 0;
margin-right:10px;
border: none;
color: #fff;
cursor: pointer;
background: #6a00de;
opacity: 1;
transition: all 0.1s ease;
float:right;
}
.search_box input.search_icon:hover {
background: #FFF;
color:#111;
}
.menu-link {
display: none;
}
.spinner-master input[type=checkbox] {
display: none;
}
.menu {
width: 100%;
height: auto;
background: #170030;
color:#170030;
transition: all 0.3s ease;
margin-top:5px;
}
.menu ul {
padding: 0px;
margin: 0px;
list-style: none;
position: relative;
display: inline-block;
}
.menu > li > ul.sub_menu {
min-width: 10em;
padding: 4px 0;
background-color: #111;
border: 1px solid #fff;
}
.menu ul li {
padding: 0px;
}
.menu > ul > li {
display: inline-block;
}
.menu ul li a {
display: block;
text-decoration: none;
color: #fff;
font-size: 18px;
height:100%;
}
.menu ul li a:hover {
background: #111;
color: #fff;
}
.menu ul li.hover > a {
background: #111;
color: #FFF;
}
.menu ul li > a {
padding: 15px;
}
.menu ul ul {
display: none;
position: absolute;
top: 100%;
min-width: 160px;
background: #111;
}
.menu ul li:hover > ul {
display: block;
}
.menu ul ul > li {
position: relative;
}
.menu ul ul > li a {
padding: 10px 15px;
height: auto;
background: #000000;
}
.menu ul ul > li a:hover {
background: #111;
color: #fff;
}
.menu ul ul ul {
position: absolute;
left: 100%;
top: 0;
}
#media all and (max-width: 860px) {
.example-header .container {
width: 100%;
}
#search {
color: #fff;
padding: 0px 20px 0px 5px;
margin-top:25px;
}
.spinner-master * {
transition: all 0.3s;
box-sizing: border-box;
}
.spinner-master {
position: relative;
margin: 15px;
height: 30px;
width: 30px;
float: left;
}
.spinner-master label {
cursor: pointer;
position: absolute;
z-index: 99;
height: 100%;
width: 100%;
top: 5px;
left: 0;
}
.spinner-master .spinner {
position: absolute;
height: 4px;
width: 100%;
padding: 0;
background-color: #fff;
}
.spinner-master .diagonal.part-1 {
position: relative;
float: left;
}
.spinner-master .horizontal {
position: relative;
float: left;
margin-top: 4px;
}
.spinner-master .diagonal.part-2 {
position: relative;
float: left;
margin-top: 4px;
}
.spinner-master input[type=checkbox]:checked ~ .spinner-spin > .horizontal {
opacity: 0;
}
.spinner-master input[type=checkbox]:checked ~ .spinner-spin > .diagonal.part-1 {
transform: rotate(135deg);
-webkit-transform: rotate(135deg);
margin-top: 10px;
}
.spinner-master input[type=checkbox]:checked ~ .spinner-spin > .diagonal.part-2 {
transform: rotate(-135deg);
-webkit-transform: rotate(-135deg);
margin-top: -12px;
}
a.menu-link {
display: block;
color: #fff;
float: left;
text-decoration: none;
padding: 10px 16px;
font-size: 1.5em;
}
a.menu-link:hover {
color: #efa666;
}
a.menu-link:after {
content: “2630”;
font-weight: normal;
}
a.menu-link.active:after {
content: “2715”;
}
.menu {
clear: both;
min-width: inherit;
float: none;
top:0px;
position:relative;
}
.menu, .menu > ul ul {
overflow: hidden;
max-height: 0;
background-color: #39484d;
}
.menu > li > ul.sub-menu {
padding: 0px;
border: none
}
.menu.active, .menu > ul ul.active {
max-height: 55em;
}
.menu ul {
display: inline;
}
.menu li, .menu > ul > li {
display: block;
}
.menu > ul > li:last-of-type a {
border: none;
}
.menu li a {
color: #fff;
display: block;
padding: 0.8em;
position: relative;
}
.menu li.has-submenu > a:after {`
content: ‘+’;
position: absolute;
top: 0;
right: 0;
display: block;
font-size: 1.5em;
padding: 0.55em 0.5em;
}
.menu li.has-submenu > a.active:after {
content: “-“;
}
.menu ul ul > li a {
background:#170030;
padding: 10px 18px 10px 30px;
border-bottom: 1px solid #111;
}
.menu ul li a:hover {
background: #4b5f65;
color: #fff;
}
.menu ul li.hover > a {
background: #111;
color: #fff;
}
.menu ul ul, .menu ul ul ul {
display: inherit;
position: relative;
left: auto;
top: auto;
border: none;
}
.search_box.active {
position: absolute;
top: 63px;
z-index: 10;
width:70%;
right:2px;
}
.search_box input {
width: 50%;
float:left;
}
.search_box input.search_icon {
width: 30%;
float:right;
margin-right:14px;
margin-top:-37px;
}
}

Answer 1

.menu ul ul {
display: none;
position: absolute;
top: 100%;
min-width: 160px;
background: #111;
}
delete display: none
.menu ul ul {
position: absolute;
top: 100%;
min-width: 160px;
background: #111;
}
or change to display:block;
.menu ul ul {
display:block;
position: absolute;
top: 100%;
min-width: 160px;
background: #111;
}
try it..