/* ===== Reset & Base ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: 'Noto Serif JP', serif;
  color: #2c2c2c;
  background: #faf9f7;
  line-height: 1.8;
}

img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

a {
  color: inherit;
  text-decoration: none;
  transition: opacity 0.2s;
}

a:hover {
  opacity: 0.75;
}

/* ===== Utility ===== */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 100px 0;
}

.section__label {
  font-family: 'Playfair Display', serif;
  font-size: 0.8rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: #3a6ea5;
  margin-bottom: 12px;
}

.section__title {
  font-family: 'Noto Serif JP', serif;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 600;
  line-height: 1.5;
  color: #1a1a1a;
  margin-bottom: 20px;
}

.section__title--center {
  text-align: center;
}

.section__desc {
  text-align: center;
  color: #666;
  font-size: 0.93rem;
  margin-bottom: 60px;
}

/* ===== Button ===== */
.btn {
  display: inline-block;
  padding: 14px 36px;
  font-family: 'Noto Serif JP', serif;
  font-size: 0.9rem;
  letter-spacing: 0.1em;
  border: 1.5px solid currentColor;
  transition: background 0.25s, color 0.25s;
  cursor: pointer;
}

.btn--light {
  color: #fff;
  border-color: #fff;
}

.btn--light:hover {
  background: #fff;
  color: #2c2c2c;
  opacity: 1;
}

.btn--outline {
  color: rgba(255,255,255,0.85);
  border-color: rgba(255,255,255,0.6);
}

.btn--outline:hover {
  background: rgba(255,255,255,0.15);
  opacity: 1;
}

.btn--dark {
  color: #2c2c2c;
  border-color: #2c2c2c;
  margin-top: 24px;
}

.btn--dark:hover {
  background: #2c2c2c;
  color: #fff;
  opacity: 1;
}

/* ===== Header ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(250, 249, 247, 0.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(58, 110, 165, 0.15);
}

.header__inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header__logo {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 12px;
  line-height: 1.2;
}

.header__logo-img {
  width: 56px;
  height: 56px;
  object-fit: contain;
  flex-shrink: 0;
  border-radius: 4px;
}

.header__logo-text {
  display: flex;
  flex-direction: column;
}

.header__logo-en {
  font-size: 1.35rem;
  font-weight: 600;
  color: #1a1a1a;
  letter-spacing: 0.05em;
}

.header__logo-ja {
  font-size: 0.9rem;
  letter-spacing: 0.12em;
  color: #3a6ea5;
}

.nav__list {
  display: flex;
  gap: 28px;
  list-style: none;
}

.nav__list a {
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  color: #444;
  position: relative;
}

.nav__list a::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 0;
  height: 1px;
  background: #3a6ea5;
  transition: width 0.25s;
}

.nav__list a:hover::after {
  width: 100%;
  opacity: 1;
}

/* ===== Hero ===== */
.hero {
  position: relative;
  height: 60vh;
  min-height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.hero__image-wrap {
  position: absolute;
  inset: 0 60px;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(15, 25, 50, 0.5) 0%,
    rgba(15, 25, 50, 0.62) 100%
  );
}

.hero__content {
  position: relative;
  z-index: 1;
  color: #fff;
  padding: 0 24px;
}

.hero__tagline {
  font-size: 1.0rem;
  letter-spacing: 0.35em;
  margin-bottom: 24px;
  opacity: 0.9;
}

.sp-only {
  display: none;
}

.hero__title {
  font-size: clamp(2.4rem, 6vw, 4.8rem);
  font-weight: 600;
  line-height: 1.25;
  margin-bottom: 16px;
  letter-spacing: 0.1em;
}

.hero__subtitle {
  font-size: 0.9rem;
  letter-spacing: 0.2em;
  opacity: 0.85;
}

/* ===== About ===== */
.about {
  background: #fff;
}

.about__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: center;
}

.about__image-wrap {
  aspect-ratio: 4/3;
  overflow: hidden;
  border-radius: 12px;
}

.about__image {
  transition: transform 0.6s ease, filter 0.6s ease;
  /* filter: brightness(0.9) saturate(0.85); */
}

/* .about__image-wrap:hover .about__image {
  transform: scale(1.04);
} */

.about__body {
  color: #555;
  font-size: 0.93rem;
  margin-bottom: 16px;
}

.about__badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.badge {
  display: inline-block;
  padding: 6px 16px;
  background: #eef4fb;
  color: #3a6ea5;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  border: 1px solid #c8d9f0;
}

/* ===== Services ===== */
.services {
  background: #faf9f7;
}

.services__group {
  margin-bottom: 56px;
}

.services__group:last-of-type {
  margin-bottom: 0;
}

.services__group-header {
  border-left: 4px solid #3a6ea5;
  padding: 10px 0 10px 16px;
  margin-bottom: 28px;
}

.services__group-header--purchase {
  border-left-color: #8a6ea5;
}

.services__group-header--reform {
  border-left-color: #b07030;
}

.services__group-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: #1a1a1a;
  letter-spacing: 0.04em;
}

.services__group-title span {
  font-size: 0.78rem;
  font-weight: 400;
  color: #888;
  margin-left: 12px;
  letter-spacing: 0.06em;
}

.services__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.services__card {
  background: #fff;
  border: 1px solid #e4ecf6;
  overflow: hidden;
  transition: box-shadow 0.25s, transform 0.25s;
}

.services__card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08);
}

.services__card-image-wrap {
  position: relative;
  aspect-ratio: 4/3;
  overflow: hidden;
}

.services__card-image {
  transition: transform 0.5s ease;
}

.services__card:hover .services__card-image {
  transform: scale(1.06);
}

.services__card-tag {
  position: absolute;
  top: 12px;
  left: 12px;
  background: #3a6ea5;
  color: #fff;
  font-size: 0.7rem;
  padding: 3px 10px;
  letter-spacing: 0.05em;
}

.services__card-tag--purchase {
  background: #8a6ea5;
}

.services__card-tag--reform {
  background: #b07030;
}

.services__card-body {
  padding: 16px;
}

.services__card-title {
  font-size: 0.97rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: #1a1a1a;
  line-height: 1.4;
}

.services__card-desc {
  font-size: 0.8rem;
  color: #777;
  line-height: 1.7;
  margin-bottom: 12px;
}

.services__card-items {
  list-style: none;
  font-size: 0.78rem;
  color: #555;
}

.services__card-items li {
  padding: 3px 0 3px 14px;
  position: relative;
}

.services__card-items li::before {
  content: '–';
  position: absolute;
  left: 0;
  color: #3a6ea5;
}

.services__summary {
  margin-top: 20px;
  padding: 16px 20px;
  background: #f0f5fc;
  border-left: 3px solid #3a6ea5;
  display: flex;
  align-items: baseline;
  gap: 20px;
  flex-wrap: wrap;
}

.services__summary--purchase {
  border-left-color: #8a6ea5;
}

.services__summary--purchase .services__summary-label {
  color: #8a6ea5;
}

.services__summary--reform {
  border-left-color: #b07030;
}

.services__summary--reform .services__summary-label {
  color: #b07030;
}

.services__summary-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: #3a6ea5;
  letter-spacing: 0.08em;
  white-space: nowrap;
  flex-shrink: 0;
}

.services__summary-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.services__summary-list li {
  font-size: 0.78rem;
  color: #555;
  background: #fff;
  border: 1px solid #c8d9f0;
  padding: 4px 12px;
  border-radius: 2px;
}

.services__note {
  margin-top: 40px;
  font-size: 0.82rem;
  color: #888;
  line-height: 1.8;
  padding: 20px;
  background: #f0f5fc;
  border-left: 3px solid #3a6ea5;
}

/* ===== Flow ===== */
.flow {
  background: #1a2845;
  color: #e8f0ed;
}

.flow .section__label {
  color: #7aabdc;
}

.flow .section__title {
  color: #f0f5fc;
}

.flow .section__desc {
  color: rgba(232, 240, 237, 0.7);
}

.flow__steps {
  display: flex;
  align-items: flex-start;
  gap: 0;
}

.flow__step {
  flex: 1;
  text-align: center;
}

.flow__step-image-wrap {
  aspect-ratio: 4/3;
  overflow: hidden;
  margin-bottom: 24px;
  opacity: 0.85;
}

.flow__step-num {
  font-family: 'Playfair Display', serif;
  font-size: 2.4rem;
  font-style: italic;
  color: #7aabdc;
  line-height: 1;
  margin-bottom: 12px;
}

.flow__step-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: #f0f5fc;
  letter-spacing: 0.04em;
}

.flow__step-desc {
  font-size: 0.82rem;
  color: rgba(232, 240, 237, 0.72);
  line-height: 1.8;
  padding: 0 16px;
}

.flow__arrow {
  font-size: 1.8rem;
  color: #7aabdc;
  padding: 0 16px;
  margin-top: 80px;
  flex-shrink: 0;
}

/* ===== FAQ ===== */
.faq {
  background: #fff;
}

.faq__categories {
  display: flex;
  flex-direction: column;
  gap: 56px;
}

.faq__category-title {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: #3a6ea5;
  border-bottom: 2px solid #3a6ea5;
  padding-bottom: 10px;
  margin-bottom: 4px;
}

.faq__item {
  border-bottom: 1px solid #e4ecf6;
}

.faq__question {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px 0;
  cursor: pointer;
  list-style: none;
  font-size: 0.95rem;
  font-weight: 600;
  color: #1a1a1a;
  line-height: 1.6;
  transition: color 0.2s;
}

.faq__question::-webkit-details-marker {
  display: none;
}

.faq__question:hover {
  color: #3a6ea5;
}

.faq__q-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  background: #3a6ea5;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Playfair Display', serif;
  font-size: 0.9rem;
  font-style: italic;
  border-radius: 50%;
  margin-top: 2px;
}

.faq__arrow {
  margin-left: auto;
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  position: relative;
  margin-top: 4px;
}

.faq__arrow::before,
.faq__arrow::after {
  content: '';
  position: absolute;
  top: 50%;
  background: currentColor;
  height: 1.5px;
  width: 10px;
  transition: transform 0.25s;
}

.faq__arrow::before {
  right: 6px;
  transform: translateY(-50%) rotate(45deg);
}

.faq__arrow::after {
  right: 0;
  transform: translateY(-50%) rotate(-45deg);
}

details[open] .faq__arrow::before {
  transform: translateY(-50%) rotate(-45deg);
}

details[open] .faq__arrow::after {
  transform: translateY(-50%) rotate(45deg);
}

.faq__answer {
  display: flex;
  gap: 16px;
  padding: 4px 0 24px;
}

.faq__a-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  background: #eef4fb;
  color: #3a6ea5;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Playfair Display', serif;
  font-size: 0.9rem;
  font-style: italic;
  border-radius: 50%;
  margin-top: 2px;
}

.faq__answer p {
  font-size: 0.9rem;
  color: #555;
  line-height: 1.85;
  padding-top: 4px;
}

.faq__contact {
  margin-top: 64px;
  text-align: center;
  padding: 48px 32px;
  background: #f0f5fc;
  border: 1px solid #c8d9f0;
}

.faq__contact p {
  font-size: 0.93rem;
  color: #555;
}

/* ===== System Development ===== */
.sysdev {
  background: #f5f7fc;
}

.sysdev__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.sysdev__card {
  background: #fff;
  border: 1px solid #dce6f5;
  overflow: hidden;
  transition: box-shadow 0.25s, transform 0.25s;
}

.sysdev__card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(58, 110, 165, 0.1);
}

.sysdev__card-image-wrap {
  aspect-ratio: 16/9;
  overflow: hidden;
}

.sysdev__card-image {
  transition: transform 0.5s ease;
}

.sysdev__card:hover .sysdev__card-image {
  transform: scale(1.06);
}

.sysdev__card-body {
  padding: 20px;
}

.sysdev__card-icon {
  font-family: 'Playfair Display', serif;
  font-size: 1.6rem;
  font-style: italic;
  color: #c8d9f0;
  line-height: 1;
  margin-bottom: 8px;
}

.sysdev__card-title {
  font-size: 0.97rem;
  font-weight: 600;
  color: #1a1a1a;
  margin-bottom: 10px;
  line-height: 1.4;
}

.sysdev__card-desc {
  font-size: 0.8rem;
  color: #777;
  line-height: 1.75;
  margin-bottom: 12px;
}

.sysdev__card-items {
  list-style: none;
  font-size: 0.78rem;
  color: #555;
}

.sysdev__card-items li {
  padding: 3px 0 3px 14px;
  position: relative;
}

.sysdev__card-items li::before {
  content: '–';
  position: absolute;
  left: 0;
  color: #3a6ea5;
}

.sysdev__single {
  display: grid;
  grid-template-columns: 40% 1fr;
  background: #fff;
  border: 1px solid #dce6f5;
  overflow: hidden;
}

.sysdev__single-image-wrap {
  overflow: hidden;
  min-height: 260px;
}

.sysdev__single-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.sysdev__single:hover .sysdev__single-image {
  transform: scale(1.04);
}

.sysdev__single-body {
  padding: 36px 40px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 24px;
}

.sysdev__single-lead {
  font-size: 0.9rem;
  color: #555;
  line-height: 1.9;
}

.sysdev__single-tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.sysdev__single-tags li {
  font-size: 0.82rem;
  color: #3a6ea5;
  background: #eef4fb;
  border: 1px solid #c8d9f0;
  padding: 5px 14px;
}

.sysdev__single-btn {
  align-self: flex-start;
  margin-top: 0;
}


/* ===== Access ===== */
.access {
  background: #faf9f7;
}

.access__list-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 64px;
  max-width: 860px;
  margin: 32px auto 0;
}

.access__list {
  display: grid;
  grid-template-columns: 9em 1fr;
  gap: 16px 24px;
  align-content: start;
  font-size: 0.92rem;
}

.access__list dt {
  font-weight: 600;
  color: #3a6ea5;
  padding-top: 2px;
}

.access__list dd {
  color: #555;
  line-height: 1.7;
}

.access__list a {
  color: #3a6ea5;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.access__docs {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.access__doc-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: #3a6ea5;
  font-size: 0.88rem;
}

.access__doc-link:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
  opacity: 0.75;
}

.access__doc-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 1px 6px;
  background: #c0392b;
  color: #fff;
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  border-radius: 2px;
  flex-shrink: 0;
}

.access__map {
  aspect-ratio: 1;
}

.access__map-placeholder {
  width: 100%;
  height: 100%;
  min-height: 360px;
  background: #e4ecf6;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #aaa;
  font-size: 0.85rem;
  border: 1px dashed #b8cde8;
}

/* ===== Footer ===== */
.footer {
  background: #1a2845;
  color: #b8cde8;
}

.footer__inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  padding-top: 64px;
  padding-bottom: 48px;
}

.footer__logo {
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: #f0f5fc;
  margin-bottom: 8px;
}

.footer__tagline {
  font-size: 0.8rem;
  letter-spacing: 0.18em;
  opacity: 0.65;
  margin-bottom: 16px;
}

.footer__license {
  font-size: 0.72rem;
  color: rgba(184, 208, 202, 0.55);
  line-height: 1.6;
}

.footer__nav ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer__nav a {
  font-size: 0.86rem;
  letter-spacing: 0.05em;
  color: #b8cde8;
}

.footer__contact-label {
  font-size: 0.72rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: #7aabdc;
  margin-bottom: 8px;
}

.footer__tel a {
  font-family: serif;
  font-size: 1.5rem;
  color: #f0f5fc;
  letter-spacing: 0.05em;
}

.footer__hours {
  font-size: 0.75rem;
  color: rgba(184, 208, 202, 0.6);
  margin-top: 6px;
}

.footer__copy {
  text-align: center;
  padding: 20px 24px;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: #4a6082;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

/* ===== Hamburger Toggle ===== */
.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  z-index: 200;
  flex-shrink: 0;
}

.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: #2c2c2c;
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease, width 0.3s ease;
  transform-origin: center;
}

.nav__toggle.is-open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav__toggle.is-open span:nth-child(2) {
  opacity: 0;
  width: 0;
}

.nav__toggle.is-open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.nav__backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  z-index: 98;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.nav__backdrop.is-visible {
  display: block;
  opacity: 1;
}

/* ===== Responsive ===== */

/* タブレット横（広） */
@media (max-width: 1100px) {
  .services__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* タブレット */
@media (max-width: 960px) {
  .section {
    padding: 80px 0;
  }

  .services__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .about__inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .flow__steps {
    flex-direction: column;
    align-items: stretch;
  }

  .flow__arrow {
    transform: rotate(90deg);
    margin: 0 auto;
    padding: 0;
  }

  .access__list-wrap {
    grid-template-columns: 1fr;
    gap: 24px 0;
  }

  .access__list {
    grid-template-columns: 9em auto;
    justify-content: center;
  }

  .footer__inner {
    grid-template-columns: 1fr 1fr;
  }

  .footer__brand {
    grid-column: 1 / -1;
  }
}

/* タブレット縦・ハンバーガーナビ */
@media (max-width: 800px) {
  .nav__toggle {
    display: flex;
  }

  .nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    z-index: 99;
    background: rgba(250, 249, 247, 0.98);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid rgba(58, 110, 165, 0.2);
    overflow: hidden;
    max-height: 0;
    transition: max-height 0.35s ease, box-shadow 0.3s ease;
  }

  .nav--open {
    max-height: 400px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
  }

  .nav__list {
    flex-direction: column;
    gap: 0;
    padding: 8px 0 16px;
  }

  .nav__list li {
    border-bottom: 1px solid rgba(58, 110, 165, 0.1);
  }

  .nav__list li:last-child {
    border-bottom: none;
  }

  .nav__list a {
    display: block;
    padding: 14px 24px;
    font-size: 0.95rem;
    letter-spacing: 0.06em;
  }

  .nav__list a::after {
    display: none;
  }

  .sysdev__single {
    grid-template-columns: 1fr;
  }

  .sysdev__single-image-wrap {
    height: 220px;
    min-height: unset;
  }

  .sysdev__single-body {
    padding: 28px 24px;
  }

  .hero__image-wrap {
    inset: 0 32px;
  }
}

/* スマートフォン */
@media (max-width: 640px) {
  .section {
    padding: 56px 0;
  }

  .sp-only {
    display: inline;
  }

  .header__logo-en {
    font-size: 1.1rem;
  }

  .header__logo-ja {
    font-size: 0.78rem;
  }

  .hero__image-wrap {
    inset: 0 16px;
  }

  .hero__tagline {
    font-size: 0.88rem;
    letter-spacing: 0.15em;
  }

  .section__desc {
    margin-bottom: 40px;
  }

  .services__grid {
    grid-template-columns: 1fr;
  }

  .services__summary {
    flex-direction: column;
    gap: 12px;
  }

  .faq__question {
    font-size: 0.88rem;
  }

  .faq__contact {
    padding: 32px 20px;
  }

  .footer__inner {
    grid-template-columns: 1fr;
  }
}

/* 小型スマートフォン */
@media (max-width: 480px) {
  .section {
    padding: 40px 0;
  }

  .header__logo-ja {
    display: none;
  }

  .hero__tagline {
    letter-spacing: 0.1em;
  }

  .hero__subtitle {
    font-size: 0.82rem;
    letter-spacing: 0.12em;
  }

  .access__list {
    grid-template-columns: 7em auto;
  }

  .sysdev__single-body {
    padding: 24px 16px;
    gap: 16px;
  }
}