/* ===== Reset & base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "Inter", "Noto Sans JP", sans-serif;
  color: #1a1a1a;
  background: #fff;
  line-height: 1.9;
  letter-spacing: 0.04em;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

:root {
  --teal: #6fd4c9;
  --blue: #4a90d9;
  --grad: linear-gradient(135deg, #7ee0d0 0%, #55b8d8 45%, #4a8fd9 100%);
  --gray: #7a7a7a;
  --max-w: 1080px;
}

.pc-only { display: inline; }
@media (max-width: 768px) { .pc-only { display: none; } }

/* ===== Reveal animation (JSが有効な場合のみ非表示から開始) ===== */
.js .reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.9s ease, transform 0.9s ease; }
.js .reveal.visible { opacity: 1; transform: translateY(0); }

/* ===== Header ===== */
.header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 22px 32px;
  pointer-events: none;
}
.header__logo, .header__menu-btn { pointer-events: auto; }
.header__logo img { width: 180px; }
.header__menu-btn {
  width: 68px; height: 68px; border: none; border-radius: 50%;
  background: var(--grad);
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 6px;
  cursor: pointer; transition: transform 0.3s ease;
}
.header__menu-btn:hover { transform: scale(1.06); }
.header__menu-btn span {
  display: block; height: 2px; background: #fff; border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease, width 0.3s ease;
}
.header__menu-btn span:nth-child(1) { width: 30px; }
.header__menu-btn span:nth-child(2) { width: 22px; }
.header__menu-btn span:nth-child(3) { width: 30px; }
.header__menu-btn.open span:nth-child(1) { transform: translateY(8px) rotate(45deg); width: 28px; }
.header__menu-btn.open span:nth-child(2) { opacity: 0; }
.header__menu-btn.open span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); width: 28px; }

/* ===== Nav overlay ===== */
.nav-overlay {
  position: fixed; inset: 0; z-index: 90;
  background: var(--grad);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; visibility: hidden; transition: opacity 0.45s ease, visibility 0.45s;
}
.nav-overlay.open { opacity: 1; visibility: visible; }
.nav-overlay__list { text-align: center; display: grid; gap: 28px; }
.nav-overlay__list a { color: #fff; display: inline-block; }
.nav-en { font-size: 2rem; font-weight: 700; display: block; line-height: 1.3; }
.nav-ja { font-size: 0.85rem; opacity: 0.85; display: block; }
.nav-contact {
  margin-top: 10px; padding: 14px 36px; border: 1.5px solid #fff; border-radius: 40px;
  font-weight: 700; transition: background 0.3s, color 0.3s;
}
.nav-contact:hover { background: #fff; color: var(--blue); }

/* ===== Hero ===== */
.hero { padding: 160px 6vw 100px; max-width: 1280px; margin: 0 auto; }
.hero__inner { display: flex; align-items: center; justify-content: space-between; gap: 40px; }
.label { display: flex; align-items: center; gap: 10px; font-size: 1.05rem; font-weight: 500; }
.dot { width: 10px; height: 10px; border-radius: 50%; background: var(--teal); }
.hero__title { font-size: clamp(2.6rem, 6vw, 4.4rem); font-weight: 900; letter-spacing: 0.12em; margin-top: 28px; }
.hero__sub { color: var(--gray); font-size: clamp(1rem, 2vw, 1.35rem); letter-spacing: 0.08em; margin-top: 10px; }
.hero__arc {
  width: clamp(180px, 24vw, 300px); aspect-ratio: 1;
  flex-shrink: 0;
}
.hero__mission { margin-top: 90px; padding-top: 60px; border-top: 1px solid #bfe3ef; display: grid; gap: 1.6em; font-size: 1.02rem; }

/* ===== Section title ===== */
.section-title {
  font-size: clamp(2rem, 4.5vw, 3rem); font-weight: 800; letter-spacing: 0.06em;
  background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent;
  margin-bottom: 0.8em; width: fit-content;
}
.section-title--white { background: none; color: #fff; }

/* ===== Service ===== */
.service {
  background: var(--grad);
  border-radius: 0 120px 0 0;
  padding: 110px 6vw 130px;
  margin-top: 60px;
}
.service__inner { max-width: var(--max-w); margin: 0 auto; }
.service__lead { color: #fff; max-width: 620px; font-size: 1.02rem; }
.service__cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; margin-top: 70px; }
.service-card {
  background: #fff; border-radius: 28px; padding: 44px 32px 40px;
  box-shadow: 0 18px 50px rgba(30, 80, 120, 0.18);
  transition: transform 0.35s ease;
}
.service-card:hover { transform: translateY(-8px); }
.service-card__num { font-size: 0.95rem; font-weight: 700; color: var(--teal); letter-spacing: 0.15em; }
.service-card h3 { font-size: 1.3rem; font-weight: 700; margin-top: 14px; line-height: 1.5; }
.service-card__en { font-size: 0.8rem; color: var(--gray); text-transform: uppercase; letter-spacing: 0.12em; margin: 6px 0 18px; }
.service-card__desc { font-size: 0.95rem; }
@media (max-width: 860px) { .service__cards { grid-template-columns: 1fr; } }

/* ===== Value ===== */
.value { padding: 130px 6vw 60px; }
.value__inner { max-width: var(--max-w); margin: 0 auto; }
.value__list { display: grid; gap: 90px; margin-top: 50px; }
.value-item__label {
  color: var(--teal); font-weight: 600; letter-spacing: 0.2em; font-size: 1.05rem;
  display: flex; align-items: center; gap: 16px;
}
.value-item__label .line { width: 46px; height: 1.5px; background: var(--teal); display: inline-block; }
.value-item h3 { font-size: clamp(1.4rem, 3vw, 1.9rem); font-weight: 700; margin: 22px 0 18px; }
.value-item p { max-width: 820px; }

/* ===== Statement ===== */
.statement { padding: 140px 6vw; display: flex; justify-content: center; background: #fafcfd; }
.statement__text {
  writing-mode: vertical-rl; text-orientation: upright;
  font-size: clamp(1.5rem, 3.4vw, 2.2rem); font-weight: 700; letter-spacing: 0.28em; line-height: 2.4;
}

/* ===== Works ===== */
.works { padding: 130px 6vw; }
.works__inner { max-width: var(--max-w); margin: 0 auto; }
.works__list { display: grid; gap: 100px; margin-top: 60px; }
.work-item { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.work-item--reverse .work-item__img { order: 2; }
.work-item__img img { border-radius: 24px; aspect-ratio: 3/2; object-fit: cover; box-shadow: 0 20px 50px rgba(30,80,120,0.15); }
.work-item h3 { font-size: 1.35rem; font-weight: 700; margin-bottom: 18px; line-height: 1.6; }
.work-item p { font-size: 0.97rem; }
@media (max-width: 860px) {
  .work-item { grid-template-columns: 1fr; gap: 28px; }
  .work-item--reverse .work-item__img { order: 0; }
}

/* ===== Company ===== */
.company { padding: 110px 6vw; background: #f4f9fb; border-radius: 120px 0 0 0; }
.company__inner { max-width: 860px; margin: 0 auto; }
.company__img { margin-top: 30px; }
.company__img img { border-radius: 24px; aspect-ratio: 21/9; object-fit: cover; width: 100%; box-shadow: 0 20px 50px rgba(30,80,120,0.12); }
.company__table { margin-top: 40px; }
.company__table > div {
  display: grid; grid-template-columns: 180px 1fr; gap: 24px;
  padding: 26px 8px; border-bottom: 1px solid #d8e8ef;
}
.company__table dt { font-weight: 700; color: #444; }
@media (max-width: 600px) {
  .company__table > div { grid-template-columns: 1fr; gap: 4px; }
}

/* ===== Recruit ===== */
.recruit { padding: 130px 6vw; }
.recruit__inner { max-width: var(--max-w); margin: 0 auto; display: grid; grid-template-columns: 1.1fr 1fr; gap: 60px; align-items: center; }
.recruit__img img { border-radius: 24px; box-shadow: 0 20px 50px rgba(30,80,120,0.15); }
.recruit__body h3 { font-size: clamp(1.5rem, 3vw, 2rem); font-weight: 700; margin-bottom: 18px; }
.recruit__body p { margin-bottom: 32px; }
@media (max-width: 860px) { .recruit__inner { grid-template-columns: 1fr; } }

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; gap: 12px;
  padding: 16px 42px; border-radius: 40px;
  background: var(--grad); color: #fff; font-weight: 700; font-size: 1rem;
  border: none; cursor: pointer;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  box-shadow: 0 10px 26px rgba(74, 144, 217, 0.35);
}
.btn:hover { transform: translateY(-3px); box-shadow: 0 14px 32px rgba(74, 144, 217, 0.45); }
.arrow { font-family: "Inter", sans-serif; }

/* ===== Contact marquee ===== */
.contact-marquee { overflow: hidden; padding: 60px 0; background: #fff; }
.contact-marquee__track {
  display: flex; gap: 70px; width: max-content;
  animation: marquee 22s linear infinite;
  font-size: clamp(2.4rem, 6vw, 4rem); font-weight: 800; white-space: nowrap;
  background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent;
}
@keyframes marquee { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* ===== Contact form ===== */
.contact-form { padding: 60px 6vw 140px; }
.contact-form__inner { max-width: 680px; margin: 0 auto; }
.form { display: grid; gap: 28px; margin-top: 30px; }
.form__field { display: grid; gap: 8px; }
.form__label { font-weight: 600; font-size: 0.95rem; }
.form__label em { color: #e05a6b; font-style: normal; margin-left: 4px; }
.form input, .form textarea {
  width: 100%; padding: 15px 18px; border: 1.5px solid #d5e4ec; border-radius: 12px;
  font: inherit; background: #fafcfd; transition: border-color 0.3s;
}
.form input:focus, .form textarea:focus { outline: none; border-color: var(--blue); background: #fff; }
.btn--submit { justify-self: start; padding: 16px 60px; }

/* ===== Footer ===== */
.footer { background: linear-gradient(135deg, #274a5e 0%, #1d3547 100%); color: #fff; padding: 70px 6vw 30px; }
.footer__inner {
  max-width: var(--max-w); margin: 0 auto;
  display: flex; justify-content: space-between; align-items: flex-start; gap: 30px;
}
.footer__logo { filter: brightness(0) invert(1); margin-bottom: 18px; }
.footer__info p { font-size: 0.9rem; opacity: 0.85; }
.footer__top { font-weight: 700; opacity: 0.9; transition: opacity 0.3s; }
.footer__top:hover { opacity: 1; }
.footer__copy { text-align: center; font-size: 0.8rem; opacity: 0.6; margin-top: 50px; }

/* ===== Mobile ===== */
@media (max-width: 600px) {
  .header { padding: 16px 18px; }
  .header__logo img { width: 130px; }
  .header__menu-btn { width: 56px; height: 56px; }
  .hero { padding: 130px 7vw 70px; }
  .hero__inner { flex-direction: column; align-items: flex-start; }
  .hero__arc { align-self: flex-end; margin-top: -40px; }
  .service { border-radius: 0 60px 0 0; }
  .company { border-radius: 60px 0 0 0; }
}