.banner { position: relative; height: 398px; }

.banner .banner-item { width: 100%; height: 100%; }

.banner .banner-item img { width: 100%; margin: 0 auto; display: block; font-size: 0; }

.header { position: relative; background-color: #101937; }

.section-box { padding: 40px 0; }

.section-a { background-color: #f3f6f9; }

.section-a .section-box { width: 1200px; padding: 60px; padding-top: 0; margin: 0 auto; box-sizing: border-box; display: flex; flex-flow: row wrap; justify-content: space-between; }

.section-a .section-box .section4-item { width: 459px; height: 178px; color: #2354d5; font-size: 20px; flex-shrink: 0; line-height: 178px; }

.section-a .section-box .section4-item img { margin-left: 50px; vertical-align: middle; }

.section-a .section-box .section4-item .des { display: inline-block; max-width: 240px; line-height: 24px; margin-left: 25px; }

.section-a .section-box .section4-item:hover { background-color: #ffffff; box-shadow: 0px 4px 32px 0px rgba(179, 195, 211, 0.32); }
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