:root {
  --blueG1: #0e5095;
  --blueG2: #3ca4cc;
  --blue1: #1673b2;
  --blue2: #edf8ff;
  --gray1: #f5f5f5;
  --red1: #e80f4b;
  --yellow1: #eeff6c;
}

/* 全体 */
body {
  font-size: 15px;
  font-family: "Noto Sans JP", sans-serif;
}

img {
  max-width: 100%;
  height: auto;
}

/* 共通 */
.container {
  max-width: 1200px;
  padding: 0 20px;
  margin-left: auto;
  margin-right: auto;
}

.bg-gradation {
  background: linear-gradient(90deg, var(--blueG1), var(--blueG2));
  border-radius: 30px;
  color: #fff;
}

.bg-white {
  background: #fff;
  border: 20px solid var(--blue2);
  border-radius: 30px;
  color: var(--blue1);
}

.marker {
  background: linear-gradient(transparent 50%, var(--yellow1) 50%);
}

.header-bg {
  display: inline-block;
  background: linear-gradient(90deg, var(--blueG1), var(--blueG2));
  border-radius: 5px;
  color: #fff;
  letter-spacing: 0.1em;
  padding: 10px 20px;
  box-shadow: 10px 10px 0 var(--blueG1);
}

.header-bg-white {
  display: inline-block;
  background: #fff;
  border-radius: 5px;
  color: var(--blue1);
  letter-spacing: 0.1em;
  padding: 10px 20px;
  box-shadow: 10px 10px 0 var(--blueG1);
  border: 4px solid var(--blue1);
}

/* header */
#mv {
  border-top-left-radius: 0;
  border-top-right-radius: 0;
  padding: 14px 40px 90px 40px;
}

.header-menu {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 18px;
}

.header-logo {
  width: 140px;
}

#top-menu {
  display: flex;
  column-gap: 40px;
}

.hamburger {
  width: 50px;
  height: 50px;
  position: relative;
  display: none;
}

.hamburger span {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  transition: all .3s;
}

.hamburger .bar {
  content: "";
  background-color: #fff;
  width: 30px;
  height: 2px;
}

.hamburger .bar:nth-child(2) {
  top: 10px;
}

.hamburger .bar:nth-child(3) {
  top: 20px;
}

.hamburger .hamburger-text {
  bottom: 0;
}

.hamburger.active .bar:first-child {
  top: 10px;
  transform: translateX(-50%) rotate(45deg);
}

.hamburger.active .bar:nth-child(2) {
  opacity: 0;
}

.hamburger.active .bar:nth-child(3) {
  top: 10px;
  transform:  translateX(-50%) rotate(-45deg);
}

@media screen and (max-width: 768px) {
  #top-menu {
      display: none;
  }

  #top-menu.active {
      background-color: rgba(0,0,0,.3);
      display: block; 
      position: fixed;
      top: 0;
      left: 0;
      width: 100vw;
      height: 100vh;
      color: #fff;
      text-align: center;
      padding: 30px;
  }

  .hamburger {
    display: block;
  }
}

/* mv-content */
/* cta */
#mv .cta-content {
  margin-bottom: 80px;
}

.cta-content .bg-white {
  display: flex;
  align-items: center;
  padding-left: 3%;
}

.cta-desc {
  position: relative;
  z-index: 2;
  flex-shrink: 0;
}

.cta-features {
  display: flex;
  column-gap: 30px;
}

.cta-features li {
  max-width: 180px;
}

.mv-img {
  margin-left: -100px;
}

.cta.bg-gradation {
  padding: 40px;
}

.cta-link {
  display: flex;
  justify-content: center;
}

.cta-welcome {
  width: 100px;
}

.cta-line {
  position: relative;
  width: 460px;
}

.cta-line img {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 100%;
  transition: all .3s;
  opacity: 1;
}

.cta-line img:nth-child(2) {
  opacity: 0;
}

.cta-line:hover img:first-child {
  opacity: 0;
}

.cta-line:hover img:nth-child(2) {
  opacity: 1;
}


/* about */
.about {
  display: flex;
  column-gap: 50px;
}

.about-img {
  width: 530px;
}

/* trouble */
.trouble {
  padding-top: 90px;
}

.trouble h2 {
  text-align: center;
  font-size: 36px;
  color: var(--blue1);
  margin-bottom: 50px;
}

.trouble-img {
  display: flex;
  justify-content: center;
  column-gap: 50px;
}

.trouble-img div {
  max-width: 158px;
}

/* case */
.case-item {
  margin-bottom: 100px;
}

.case-desc {
  display: flex;
  column-gap: 50px;
  margin-bottom: 30px;
}

.case-desc h2 {
  flex-shrink: 0;
}

.requirement-wrapper {
  display: flex;
  column-gap: 30px;
  padding: 40px 30px 30px 30px;
  border: 2px solid var(--blueG1);
  border-radius: 5px;
  position: relative;
}

.requirement-wrapper .requirement-label {
  position: absolute;
  top: -20px;
  left: 30px;
  background-color: #fff;
  color: var(--blueG1);
  padding: 10px 20px;
}

.requirement-wrapper > p {
  max-width: 300px;
  font-size: 13px;
  line-height: 1.5;
}

.case-img-sp {
  display: none;
}

@media screen and (max-width: 768px) {
  .case-img-pc {
    display: none;
  }

  .case-img-sp {
    display: block;
  }
}