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img{border-radius:1rem;width:100%}.lesson-card__txt{font-size:1.2rem;font-weight:500;line-height:1.6667;letter-spacing:.01em}@media(min-width:768px){.lesson-card__txt{font-size:1.4rem;line-height:1.857}.lesson-card__txt.letter-n-20{letter-spacing:-.02em}}.lesson-step{counter-reset:step;margin-bottom:2rem}@media(min-width:768px){.lesson-step{margin-bottom:6rem}}.lesson-step li{background-color:#f2f9ff;margin-bottom:4.4rem;padding:2rem;position:relative}@media(min-width:768px){.lesson-step li{margin-bottom:5.2rem;padding:3.2rem}}.lesson-step li:after{content:"";background:url(/images/common/icon_arrow_down02.svg) no-repeat 50%/contain;height:2.8rem;width:3.9rem;position:absolute;top:calc(100% + .8rem);left:calc(50% - 2rem)}@media(min-width:768px){.lesson-step li:after{top:calc(100% + 1.2rem)}}.lesson-step li:last-child{margin-bottom:0}.lesson-step 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