Tạo ribbon ở góc trái đẹp cho Blogspot bằng CSS

Chèn CSS

.ribbon-vip{position:absolute;left:-5px;top:-5px;z-index:1;overflow:hidden;width:75px;height:75px;text-align:right}
.ribbon-vip span{font-size:12px;font-weight:bold;color:#FFF;text-transform:uppercase;text-align:center;line-height:20px;transform:rotate(-45deg);-webkit-transform:rotate(-45deg);width:100px;display:block;background:#79A70A;background:linear-gradient(#3498DB 0%,#3498DB 100%);box-shadow:0 3px 10px -5px rgba(0,0,0,1);position:absolute;top:19px;left:-21px}
.ribbon-vip span::before{content:"";position:absolute;left:0;top:100%;z-index:-1;border-left:3px solid #3498DB;border-right:3px solid transparent;border-bottom:3px solid transparent;border-top:3px solid #3498DB}
.ribbon-vip span::after{content:"";position:absolute;right:0;top:100%;z-index:-1;border-left:3px solid transparent;border-right:3px solid #3498DB;border-bottom:3px solid transparent;border-top:3px solid #3498DB}

Chèn HTML

<div class='ribbon-vip'><span>nội dung</span></div>

Result

Chú ý: nhớ chỉnh sửa vị trí left -5px,top -5px cho phù hợp nhé