body{ background-color:#fff;}
.w100{width:100%; margin:0 auto; height:auto;}
.w1214{width:1197px; height:auto; margin:0 auto;}
.cleartx{clear:both;  height:0px;}
.classmain{width:100%; border:0px solid #000; background-repeat:no-repeat; background-position:top center;}
.zxdk_13{background-image:url(images/zxdk_13.jpg); height:184px;  }
.zxdk_16{background-image:url(images/zxdk_16.jpg); height:415px;  }

.zxdk_21{background-image:url(images/zxdk_21.jpg); height:205px;  }
.zxdk_20{background-image:url(images/zxdk_20.jpg); height:165px;  }

.zxdk_26{background-image:url(images/zxdk_26.jpg); height:563px;  }
.zxdk_29{background-image:url(images/zxdk_29.jpg); height:281px;  }

.zxdk_30{background-image:url(images/zxdk_30.jpg); height:303px;  }
.zxdk_34{background-image:url(images/zxdk_34.jpg); height:315px;  }

.zxdk_31{background-image:url(images/zxdk_31.jpg); height:248px;  }
.zxdk_32{background-image:url(images/zxdk_32.jpg); height:157px;  }