去书城，寻觅知识之旅

.
.
.header
.
.section
.
.content .
.content .book:
.content .
.content .
.
.footer
.footer a:
.footer .
.img-
.img-wrapper
.
.row .
.row .col:nth-child(3n+1) {
margin-right: 0;
}
.row .
.row .content .
.row .content .
.row .content .
.row .content .
.row .content .footer
.row .content .footer .
.
.spacing .spacing-
.spacing .spacing-inner:nth-child(1) {
width: 100%;
height: 0;
border-left: 0 solid transparent;
border-right: 0 solid transparent;
border-bottom: 20px solid #ccc;
}
.spacing .spacing-inner:nth-child(2) {
width: 0;
height: 100%;
border-left: 10px solid transparent;
border-right: 10px solid transparent;
border-bottom: 20px solid #ccc;
transition: width 0.5s ease-in-out, height 0.5s ease-in-out;
}
.spacing .spacing-inner:nth-child(3) {
width: 0;
height: 0;
border-left: 0 solid transparent;
border-right: 0 solid transparent;
border-bottom: 20px solid #ccc;
transition: width 0.5s ease-in-out, height 0.5s ease-in-out;
}
.spacing .spacing-inner:
.spacing .spacing-inner:hover .spacing-
.spacing .spacing-inner:hover .spacing-inner:nth-child(1) {
width: 100%;
height: 0;
border-left: 0 solid transparent;
border-right: 0 solid transparent;
border-bottom: 20px solid #008CBA;
}
.spacing .spacing-inner:hover .spacing-inner:nth-child(2) {
width: 0;
height: 100%;
border-left: 0 solid transparent;
border-right: 0 solid transparent;
border-bottom: 20px solid #008CBA;
}
.spacing .spacing-inner:hover .spacing-inner:nth-child(3) {
width: 0;
height: 0;
border-left: 0 solid transparent;
border-right: 0 solid transparent;
border-bottom: 20px solid #008CBA;
}
.
.footer
.footer a:
.img-wrapper
.img-wrapper .
.img-wrapper .spacing-
.img-wrapper .spacing-inner:nth-child(1) {
width: 100%;
height: 0;
border-left: 0 solid transparent;
border-right: 0 solid transparent;
border-bottom: 20px solid #ccc;
}
.img-wrapper .spacing-inner:nth-child(2) {
width: 0;
height: 100%;
border-left: 10px solid transparent;
border-right: 10px solid transparent;
border-bottom: 20px solid #ccc;
transition: width 0.5s ease-in-out, height 0.5s ease-in-out;
}
.img-wrapper .spacing-inner:nth-child(3) {
width: 0;
height: 0;
border-left: 0 solid transparent;
border-right: 0 solid transparent;
border-bottom: 20px solid #ccc;
transition: width 0.5s ease-in-out, height 0.5s ease-in-out;
}
.img-wrapper .spacing-inner:
.img-wrapper .spacing-inner:hover .spacing-
.img-wrapper .spacing-inner:hover .spacing-inner:nth-child(1) {
width: 100%;
height: 0;
border-left: 0 solid transparent;
border-right: 0 solid transparent;
border-bottom: 20px solid #008CBA;
}
.img-wrapper .spacing-inner:hover .spacing-inner:nth-child(2) {
width: 0;
height: 100%;
border-left: 10px solid transparent;
border-right: 10px solid transparent;
border-bottom: 20px solid #008CBA;
}
.img-wrapper .spacing-inner:hover .spacing-inner:nth-child(3) {
width: 0;
height: 0;
border-left: 0 solid transparent;
border-right: 0 solid transparent;
border-bottom: 20px solid #008CBA;
}
.spacing .spacing-inner:hover .spacing-inner:nth-child(1) {
width: 100%;
height: 0;
border-left: 0 solid transparent;
border-right: 0 solid transparent;
border-bottom: 20px solid #008CBA;
}
.spacing .spacing-inner:hover .spacing-inner:nth-child(2) {
width: 0;
height: 100%;
border-left: 10px solid transparent;
border-right: 10px solid transparent;
border-bottom: 20px solid #008CBA;
}
.spacing .spacing-inner:hover .spacing-inner:nth-child(3) {
width: 0;
height: 0;
border-left: 0 solid transparent;
border-right: 0 solid transparent;
border-bottom: 20px solid #008CBA;
}
.spacing .spacing-inner:hover .spacing-inner:nth-child(1) .spacing-
.spacing .spacing-inner:hover .spacing-inner:nth-child(2) .spacing-
.spacing .spacing-inner:hover .spacing-inner:nth-child(3) .spacing-
.spacing .spacing-inner:hover .spacing-inner:nth-child(1) .spacing-inner .spacing-
.spacing .spacing-inner:hover .spacing-inner:nth-child(2) .spacing-inner .spacing-
.spacing .spacing-inner:hover .spacing-inner:nth-child(3) .spacing-inner .spacing-
.spacing .spacing-inner:hover .spacing-inner:nth-child(1) .spacing-inner .spacing-inner .spacing-
.spacing .spacing-inner:hover .spacing-inner:nth-child(2) .spacing-inner .spacing-inner .spacing-
.spacing .spacing-inner:hover .spacing-inner:nth-child(3) .spacing-inner .spacing-inner .spacing-
.spacing .spacing-inner:hover .spacing-inner:nth-child(1) .spacing-inner .spacing-inner .spacing-inner .spacing-
.spacing .spacing-inner:hover .spacing-inner:nth-child(2) .spacing-inner .spacing-inner .spacing-inner .spacing-
.spacing .spacing-inner:hover .spacing-inner:nth-child(3) .spacing-inner .spacing-inner .spacing-inner .spacing-
去书城，寻觅知识之旅
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