.img-fill{width:100%;display:block}
.banner{margin-top:5.3rem}
.section-title {
    font-size: 3.25rem;
    display: inline-block;
    position: relative;
    font-family: 'SourceHanSerifCN-Heavy';
}
.section-title::after {
    content: "";
    position: absolute;
    bottom: 10%;
    left:50%;
    height: 4px;
    width:0%;
    background: var(--main-color);
    border-radius: 1px;
    transition: width .35s linear;
    transform:translateX(-50%);
    z-index:-1
}
.section-title.fade-in::after {
    width: 110%;
    transition-delay: .5s
}
.from-bottom-show{opacity:0;transform:translateY(50px)}
.section-desc{font-size:1.15rem;opacity:0;text-transform:uppercase;}

.tree {
    padding: 15vh 15%;
    text-align: center;
}
.desc{margin-top:3rem}
.tree_show{display:flex;}
.tree_show img{width:50%}
.intro_content{text-align:center;margin-bottom:5rem}
.soil {
    width: 80%;
    display: block;
    margin: -7.5% auto 15rem;
}
@media screen and (max-width:700px) {
    .intro_content{padding:0 10%}
    .tree{padding:15vh 0}
    .desc{text-align:left}
    .soil{margin:-15% auto 15rem}
}