请问怎么放置svg图片，我想让他成为网页背景，是放在css中吗？
<svg xmlns="http://www.w3.org/2000/svg" width="1920" height="1080"><path d="M393,-177L564,-178L696,-190Z" fill="#cceac3" stroke="#cceac3" stroke-width="1.51"/><path d="M28,-188L393,-177L696,-190Z" fill="#dff3c1" stroke="#dff3c1" stroke-width="1.51"/><path d="M28,-188L696,-190L773,-193Z" fill="#d2edc3" stroke="#d2edc3" stroke-width="1.51"/><path d="M453,1271L271,1290L867,1267Z" fill="#61788f" stroke="#61788f" stroke-width="1.51"/><path d="M867,1267L271,1290L1130,1291Z" fill="#476f90" stroke="#476f90" stroke-width="1.51"/><path d="M28,-188L773,-193L1291,-204Z" fill="#bee4c6" stroke="#bee4c6" stroke-width="1.51"/><path d="M1291,-204L1497,-203L1627,-207Z" fill="#9fb2c2" stroke="#9fb2c2" stroke-width="1.51"/><path d="M1521,1272L1130,1291L1640,1293Z" fill="#1c4989" stroke="#1c4989" stroke-width="1.51"/><path d="M28,-188L1291,-204L1956,-218Z" fill="#a8d1ca" stroke="#a8d1ca" stroke-width="1.51"/><path d="M1291,-204L1627,-207L1956,-218Z" fill="#9da5bd" stroke="#9da5bd" stroke-width="1.51"/><path d="M1627,-207L1826,-205L1956,-218Z" fill="#9c97b8" stroke="#9c97b8" stroke-width="1.51"/><path d="M2016,528L2078,564L2088,417Z" fill="#3a6b96" stroke="#3a6b96" stroke-width="1.51"/><path d="M2088,417L2078,564L2095,630Z" fill="#326894" stroke="#326894" stroke-width="1.51"/><path d="M2095,630L2015,663L2107,801Z" fill="#245c94" stroke="#245c94" stroke-width="1.51"/><path d="M2015,663L1986,772L2107,801Z" fill="#225897" stroke="#225897" stroke-width="1.51"/><path d="M2106,-92L1949,-40L2123,67Z" fill="#888691" stroke="#888691" stroke-width="1.51"/><path d="M1949,-40L1980,83L2123,67Z" fill="#848695" stroke="#848695" stroke-width="1.51"/><path d="M2105,-156L2106,-92L2123,67Z" fill="#86848c" stroke="#86848c" stroke-width="1.51"/><path d="M2107,801L2006,910L2127,924Z" fill="#1c468a" stroke="#1c468a" stroke-width="1.51"/><path d="M2006,910L1995,1005L2127,924Z" fill="#1d408a" stroke="#1d408a" stroke-width="1.51"/><path d="M2095,630L2107,801L2127,924Z" fill="#1d518d" stroke="#1d518d" stroke-width="1.51"/><path d="M2088,417L2095,630L2128,172Z" fill="#476f90" stroke="#476f90" stroke-width="1.51"/><path d="M2090,302L2088,417L2128,172Z" fill="#5a758e" stroke="#5a758e" stroke-width="1.51"/><path d="M2123,67L2007,163L2128,172Z" fill="#767f8e" stroke="#767f8e" stroke-width="1.51"/><path d="M2007,163L2090,302L2128,172Z" fill="#6b7b90" stroke="#6b7b90" stroke-width="1.51"/><path d="M2095,630L2127,924L2128,172Z" fill="#2d6491" stroke="#2d6491" stroke-width="1.51"/><path d="M2007,1295L2123,1294L2129,1133Z" fill="#12246b" stroke="#12246b" stroke-width="1.51"/><path d="M1986,1121L2007,1295L2129,1133Z" fill="#182978" stroke="#182978" stroke-width="1.51"/><path d="M2128,172L2127,924L2133,1057Z" fill="#1f578e" stroke="#1f578e"
background：url(xxx.svg);
不晓得可以直接把svg内容写到background不 0.0
放在DIV 中 postion:absoulted或者fixed ； z-index:-1
和其他格式的图片一样用就行了，支持的就会显示，不支持的就不显示
http://www.gbtags.com/technology/html/20130325-html5-css3-using-svg/