/* 使用 .backtest .usehelp 防止样式冲突 */
.backtest .usehelp .content { padding: 28px 60px; }
.backtest .usehelp .help__header { margin-bottom: 66px; background: url(../../img/backtest/usehelp_header.png) no-repeat 138px -3px; }
.backtest .usehelp .help__header .maintitle { font-size: 28px; color: #333; text-align: center; font-weight: bold; }
.backtest .usehelp .help__header .subtitle { font-size: 16px; color: #333; text-align: center; margin-top: 8px; }
.backtest .usehelp .help__paragraph { margin-bottom: 80px; }
.backtest .usehelp .help__paragraph .sectiontitle { font-size: 22px; color: #333; text-align: left; font-weight: bold; margin-bottom: 16px; }
.backtest .usehelp .help__paragraph .section1 { line-height: 24px; }
.backtest .usehelp .help__paragraph .sectiontext { font-size: 14px; color: #333; text-align: left; }
.backtest .usehelp .help__paragraph .sectiontext .bold { font-weight: bold; }
.backtest .usehelp .help__paragraph .section2 > div { margin-bottom: 16px; }
.backtest .usehelp .help__paragraph .left-content { float: left; width: 390px; }
.backtest .usehelp .help__paragraph .left-content .section2 { background: url(../../img/backtest/usehelp_2.png) no-repeat center center; width: 387px; height: 374px; }
.backtest .usehelp .help__paragraph .right-content { float: right; width: 350px; }
.backtest .usehelp .help__paragraph .right-content .section1 { background: url(../../img/backtest/usehelp_1.png) no-repeat center center; width: 343px; height: 118px; }
.backtest .usehelp .help__paragraph .right-content .section3 { background: url(../../img/backtest/usehelp_3.png) no-repeat center center; width: 343px; height: 106px; }