| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <style> | |
| div { | |
| border-width: 25px; | |
| border-style: solid; | |
| border-color: green; | |
| } | |
| .main { | |
| width: 100px; | |
| height: 100px; | |
| } | |
| .sub { | |
| width: 50px; | |
| height: 50px; | |
| } | |
| .sub-sub { | |
| width: 0px; | |
| height: 0px; | |
| } | |
| .low-opacity { | |
| opacity: 0.2; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <div class="main"> | |
| <div class="sub low-opacity"> | |
| <div class="sub-sub low-opacity"></div> | |
| </div> | |
| </div> | |
| </body> | |
| </html> |