B2主题阴影
详细教程
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background: linear-gradient(0deg,rgba(0,0,0,.7) 0,transparent 100%);
background-color: transparent;
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background-image: linear-gradient(0deg,#000 0,rgba(0,0,0,.917) 5.3%,rgba(0,0,0,.834) 10.6%,rgba(0,0,0,.753) 15.9%,rgba(0,0,0,.672) 21.3%,rgba(0,0,0,.591) 26.8%,rgba(0,0,0,.511) 32.5%,rgba(0,0,0,.433) 38.4%,rgba(0,0,0,.357) 44.5%,rgba(0,0,0,.283) 50.9%,rgba(0,0,0,.213) 57.7%,rgba(0,0,0,.147) 65%,rgba(0,0,0,.089) 72.9%,rgba(0,0,0,.042) 81.4%,rgba(0,0,0,.011) 90.6%,transparent 100%);
