.main-visual {
    position: relative;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    z-index: -1;
    /* 背面に配置 */
}

.main-visual img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    /* 画面いっぱいにトリミング */
    pointer-events: none;
    -webkit-user-select: none;
    user-select: none;
    opacity: 0.4;
}

.main-visual-contents {
    position: absolute;
    top: 40%;
    left: 10%;
    z-index: 100;
}

.main-visual-block {
    position: relative;
    padding: 20px;
}

.main-visual-block h4 {
    font-size: 70px;
}

.main-visual-block p {
    font-size: 20px;
}

.mainbtn {
    position: relative;
    padding: 15px 50px;
    border-radius: 30px;
    color: #fff;
    text-decoration: none;
    margin: 10px;
    font-size: 20px;
}

.materialbtn {    
    background-image: linear-gradient(70deg, #659cd6 0%, #3f88d7 100%);
}

.demobtn {
    background-image: linear-gradient(70deg, #ffb251 0%, #ff7600 100%);
}

.main-contents {
    position: relative;
    width: 80%;
    left: 10%;
    margin: 10px 0;
}

.function {
    margin: 90px 0;
}

.function h4 {
    position: relative;
    font-size: 50px;
    margin: 20px 0;
}

.slider {
    position: relative;
    width: 100%;
    max-width: 100%;
}

.slide {
    display: none;
    opacity: 0;
    transform: translateX(25px);
    transition: .5s;
    position: relative;
}

.slide.active {
    opacity: 1;
    transform: translateX(0);
}

.slide img {
    width: 100%;
    display: block;
    object-fit: cover;
    border-radius: 20px;
    height: 400px;
}

.caption {
    padding: 20px;
    background: #fff;
    color: #333;
}

.caption h3 {
    margin: 0 0 10px;
    font-size: 24px;
}

.caption p {
    margin: 0;
    color: #555;
    line-height: 1.6;
}

.circle-checks {
    display: block;
}

.circle-checks {
    display: flex;
    gap: 12px;
    /* 丸同士の間隔 */
    justify-content: center;
}

.circle-checks label {
    cursor: pointer;
    display: flex;
    align-items: center;
}

/* 本来のチェックボックスを非表示 */
.circle-checks input[type="checkbox"] {
    display: none;
}

/* 〇 の見た目 */
.circle {
    width: 15px;
    height: 15px;
    border: .2px solid #c3c3c3;
    border-radius: 50%;
    display: inline-block;
    transition: background 0.2s;
    background-color: #fff;
}

.circle.on {
    background-color: #8b8b8b;
}

.arrowbtns {
    position: relative;
}

.arrow {
    position: relative;
    width: 70px;
    height: 70px;
    border-radius: 5px;
    background: #fff;
    cursor: pointer;
    transition: 0.3s;
    margin: 0 10px;
    border: solid 2px #d9d9d9;
}

/* 左矢印 */
.arrow.left::before {
  content: "";
  position: absolute;
  left: 30px;
  top: 50%;
  width: 12px;
  height: 12px;
  border-top: 3px solid #fc8d00;
  border-left: 3px solid #fc8d00;
  transform: translateY(-50%) rotate(-45deg);
}

/* 右矢印 */
.arrow.right::before {
  content: "";
  position: absolute;
  right: 30px;
  top: 50%;
  width: 12px;
  height: 12px;
  border-top: 3px solid #fc8d00;
  border-right: 3px solid #fc8d00;
  transform: translateY(-50%) rotate(45deg);
}

/* @media (max-width: 1024px) {
.circle-checks {
    display: none;
}
.arrowbtns {
    display: flex;
}
} */

@media (max-width: 550px) {
    .main-visual-block h4 {
        font-size: 50px;
    }

    .main-visual-block p {
        font-size: 17px;
    }

    .main-visual-block {
        display: grid;
    }

    .slide img {
        height: 250px;
    }
}