/* ========================================
   RESET / BASE
======================================== */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: #22262a;
  background: #ffffff;
  font-family:
    -apple-system,
    BlinkMacSystemFont,
    "Helvetica Neue",
    "Yu Gothic",
    YuGothic,
    "Hiragino Kaku Gothic ProN",
    "Hiragino Sans",
    Meiryo,
    sans-serif;
  font-size: 16px;
  line-height: 1.8;
  letter-spacing: 0.04em;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
  max-width: 100%;
}

.container {
  width: min(1080px, calc(100% - 48px));
  margin: 0 auto;
}



/* ========================================
   HEADER
======================================== */

.header {
  position: relative;
  z-index: 100;
  width: 100%;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid #eeeeee;
}

.header__inner {
  width: min(1200px, calc(100% - 48px));
  height: 88px;
  margin: 0 auto;

  display: flex;
  align-items: center;
  justify-content: space-between;
}



/* LOGO */

.logo {
  display: inline-flex;
  flex-direction: column;
  line-height: 1;
}

.logo__main {
  color: #202428;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.15em;
}

.logo__sub {
  margin-top: 8px;
  color: #9b9da0;
  font-size: 9px;
  font-weight: 500;
  letter-spacing: 0.1em;
}



/* NAV */

.nav {
  display: flex;
  align-items: center;
  gap: 40px;
}

.nav a {
  position: relative;
  color: #565b60;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.15em;
}

.nav a::after {
  position: absolute;
  bottom: -8px;
  left: 0;

  width: 0;
  height: 1px;

  content: "";

  background: #1aa9c2;

  transition: width 0.3s ease;
}

.nav a:hover::after {
  width: 100%;
}



/* ========================================
   HERO
======================================== */

.hero {
  position: relative;
  min-height: 650px;

  display: flex;
  align-items: center;

  overflow: hidden;

  background:
    linear-gradient(
      135deg,
      #ffffff 0%,
      #fafbfc 50%,
      #eef5f6 100%
    );
}

.hero__inner {
  position: relative;
  z-index: 2;

  width: min(1080px, calc(100% - 48px));
  margin: 0 auto;
  padding: 100px 0;
}

.hero__label {
  margin: 0 0 28px;

  color: #20a8c0;

  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.22em;
}

.hero__title {
  margin: 0;

  color: #202428;

  font-size: clamp(44px, 6vw, 76px);
  font-weight: 500;
  line-height: 1.35;
  letter-spacing: 0.05em;
}

.hero__text {
  margin: 40px 0 0;

  color: #656a6f;

  font-size: 15px;
  line-height: 2.15;
}



/* HERO DECORATION */

.hero__decoration {
  position: absolute;
  top: 50%;
  right: -140px;

  width: 520px;
  height: 520px;

  transform: translateY(-50%);

  border: 1px solid rgba(32, 168, 192, 0.11);
  border-radius: 50%;
}

.hero__decoration::before {
  position: absolute;
  top: 75px;
  left: 75px;

  width: 370px;
  height: 370px;

  content: "";

  border: 1px solid rgba(32, 168, 192, 0.11);
  border-radius: 50%;
}



/* ========================================
   COMMON SECTION
======================================== */

.section {
  padding: 130px 0;
}

.section--gray {
  background: #f7f8f9;
}



/* SECTION HEADING */

.section-heading {
  margin-bottom: 65px;
}

.section-heading__en {
  margin: 0 0 12px;

  color: #1aa9c2;

  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.22em;
}

.section-heading__title {
  margin: 0;

  color: #25292d;

  font-size: 34px;
  font-weight: 500;
  letter-spacing: 0.06em;
}



/* ========================================
   ABOUT
======================================== */

.about {
  max-width: 760px;
}

.about p {
  margin: 0 0 26px;

  color: #595f64;

  font-size: 16px;
  line-height: 2.2;
}

.about p:last-child {
  margin-bottom: 0;
}



/* ========================================
   BUSINESS
======================================== */

.business {
  display: grid;

  grid-template-columns: repeat(3, 1fr);

  gap: 24px;
}

.business-card {
  min-height: 310px;

  padding: 45px 38px;

  background: #ffffff;

  border: 1px solid #e9ebed;

  transition:
    transform 0.3s ease,
    box-shadow 0.3s ease;
}

.business-card:hover {
  transform: translateY(-4px);

  box-shadow:
    0 20px 45px
    rgba(0, 0, 0, 0.05);
}

.business-card__number {
  display: block;

  margin-bottom: 42px;

  color: #1aa9c2;

  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.15em;
}

.business-card__title {
  margin: 0 0 20px;

  color: #292d31;

  font-size: 20px;
  font-weight: 500;
  letter-spacing: 0.04em;
}

.business-card__text {
  margin: 0;

  color: #70757a;

  font-size: 14px;
  line-height: 2;
}



/* ========================================
   COMPANY
======================================== */

.company {
  max-width: 850px;
}

.company-table {
  margin: 0;
}

.company-table__row {
  display: grid;

  grid-template-columns: 200px 1fr;

  border-top: 1px solid #e5e7e9;
}

.company-table__row:last-child {
  border-bottom: 1px solid #e5e7e9;
}

.company-table dt,
.company-table dd {
  margin: 0;
  padding: 28px 15px;
}

.company-table dt {
  color: #34383c;

  font-size: 13px;
  font-weight: 600;
}

.company-table dd {
  color: #63686d;

  font-size: 14px;
}



/* ========================================
   MESSAGE
======================================== */

.message {
  padding: 145px 24px;

  color: #ffffff;

  text-align: center;

  background:
    linear-gradient(
      135deg,
      #20262a 0%,
      #171c20 100%
    );
}

.message__inner {
  max-width: 900px;
  margin: 0 auto;
}

.message__label {
  margin: 0 0 28px;

  color: #62c4d6;

  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.25em;
}

.message__title {
  margin: 0;

  font-size: clamp(30px, 5vw, 52px);
  font-weight: 400;
  line-height: 1.65;
  letter-spacing: 0.08em;
}

.message__text {
  margin: 36px 0 0;

  color: rgba(255, 255, 255, 0.62);

  font-size: 13px;
  line-height: 2;
}



/* ========================================
   FOOTER
======================================== */

.footer {
  padding: 55px 0;

  background: #ffffff;
}

.footer__inner {
  width: min(1080px, calc(100% - 48px));
  margin: 0 auto;

  display: flex;
  align-items: flex-end;
  justify-content: space-between;
}

.footer__logo {
  margin: 0;

  color: #24282c;

  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.16em;
}

.footer__company {
  margin: 8px 0 0;

  color: #8b8f93;

  font-size: 11px;
}

.footer__copyright {
  margin: 0;

  color: #a0a3a6;

  font-size: 10px;
  letter-spacing: 0.04em;
}



/* ========================================
   TABLET / SMARTPHONE
======================================== */

@media screen and (max-width: 767px) {

  .container {
    width: calc(100% - 40px);
  }


  /* HEADER */

  .header__inner {
    width: calc(100% - 40px);
    height: 72px;
  }

  .logo__main {
    font-size: 17px;
  }

  .nav {
    display: none;
  }


  /* HERO */

  .hero {
    min-height: 560px;
  }

  .hero__inner {
    width: calc(100% - 40px);
    padding: 80px 0;
  }

  .hero__label {
    margin-bottom: 22px;
  }

  .hero__title {
    font-size: 42px;
    line-height: 1.45;
  }

  .hero__text {
    margin-top: 32px;
    font-size: 14px;
  }

  .hero__decoration {
    top: 50%;
    right: -230px;

    width: 420px;
    height: 420px;
  }

  .hero__decoration::before {
    top: 60px;
    left: 60px;

    width: 300px;
    height: 300px;
  }

  .pc {
    display: none;
  }


  /* SECTION */

  .section {
    padding: 90px 0;
  }

  .section-heading {
    margin-bottom: 45px;
  }

  .section-heading__title {
    font-size: 28px;
  }


  /* ABOUT */

  .about p {
    font-size: 15px;
    line-height: 2.1;
  }


  /* BUSINESS */

  .business {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .business-card {
    min-height: auto;
    padding: 34px 28px;
  }

  .business-card__number {
    margin-bottom: 25px;
  }


  /* COMPANY */

  .company-table__row {
    grid-template-columns: 1fr;
  }

  .company-table dt {
    padding: 22px 0 4px;
  }

  .company-table dd {
    padding: 0 0 22px;
  }


  /* MESSAGE */

  .message {
    padding: 100px 20px;
  }

  .message__title {
    font-size: 30px;
  }

  .message__text {
    font-size: 12px;
  }


  /* FOOTER */

  .footer {
    padding: 45px 0;
  }

  .footer__inner {
    width: calc(100% - 40px);

    display: block;
  }

  .footer__copyright {
    margin-top: 35px;
  }

}