/* =============================================
   CSS Variables
   ============================================= */
:root {
  --color-green:       #1B6B42;
  --color-green-dark:  #145233;
  --color-green-light: #E8F5EE;
  --color-green-glow:  #3a9c69;
  --color-text:        #1A1A2E;
  --color-text-mid:    #555;
  --color-text-light:  #888;
  --color-bg:          #FFFFFF;
  --color-bg-gray:     #F5F6F8;
  --color-bg-soft:     #f6f9f7;
  --color-border:      #E0E4E8;
  --color-footer-bg:   #0F2137;

  --font-ja:     'Noto Sans JP', sans-serif;
  --font-en:     'Inter', sans-serif;
  --font-mincho: 'Shippori Mincho', serif;

  --max-width:     1100px;
  --header-height: 72px;
  --radius:        6px;
  --transition:    0.25s ease;
}

/* =============================================
   Reset & Base
   ============================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-ja);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; transition: opacity var(--transition); }
a:hover { opacity: .75; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

/* =============================================
   Header
   ============================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #fff;
  height: var(--header-height);
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 1px 12px rgba(0,0,0,.06);
}
.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 28px;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 20px;
}

/* Logo */
.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  opacity: 1;
}
.logo-text { display: flex; flex-direction: column; line-height: 1.3; }
.logo-ja { font-size: .85rem; font-weight: 700; color: var(--color-text); letter-spacing: .01em; }
.logo-en { font-family: var(--font-en); font-size: .7rem; color: var(--color-text-light); letter-spacing: .04em; }

/* Nav */
.primary-nav { margin-left: auto; }
.primary-nav ul { display: flex; align-items: center; gap: 28px; }
.primary-nav a {
  font-size: .88rem;
  color: var(--color-text);
  font-weight: 500;
  position: relative;
  white-space: nowrap;
}
.primary-nav a::after {
  content: '';
  position: absolute;
  left: 0; bottom: -3px;
  width: 0; height: 2px;
  background: var(--color-green);
  transition: width var(--transition);
}
.primary-nav a:hover { opacity: 1; }
.primary-nav a:hover::after { width: 100%; }

/* Header CTA */
.header-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--color-green);
  color: #fff !important;
  font-size: .85rem;
  font-weight: 700;
  padding: 9px 20px;
  border-radius: var(--radius);
  white-space: nowrap;
  transition: background var(--transition);
  flex-shrink: 0;
}
.header-cta:hover { background: var(--color-green-dark); opacity: 1; }

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px; height: 36px;
  background: none; border: none; cursor: pointer; padding: 4px;
  margin-left: auto;
}
.nav-toggle span {
  display: block; width: 100%; height: 2px;
  background: var(--color-text); border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* =============================================
   Hero
   ============================================= */
.hero {
  position: relative;
  min-height: calc(100vh - var(--header-height));
  display: flex;
  align-items: center;
  overflow: hidden;
  background:
    linear-gradient(
      to right,
      rgba(10,20,35,.82) 0%,
      rgba(10,20,35,.55) 55%,
      rgba(10,20,35,.20) 100%
    ),
    linear-gradient(160deg, #0a2540 0%, #163a5c 40%, #1a4a6e 70%, #1a3a50 100%);
}

.hero::before {
  content: '';
  position: absolute;
  right: 0; top: 0;
  width: 55%; height: 100%;
  background:
    repeating-linear-gradient(
      90deg,
      transparent 0px, transparent 18px,
      rgba(255,255,255,.03) 18px, rgba(255,255,255,.03) 20px
    ),
    repeating-linear-gradient(
      0deg,
      transparent 0px, transparent 28px,
      rgba(255,255,255,.025) 28px, rgba(255,255,255,.025) 30px
    );
  z-index: 0;
}

.hero-overlay { display: none; }

.hero-content {
  position: relative;
  z-index: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 84px 28px 92px;
  width: 100%;
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 52px;
  align-items: center;
}
.hero-eyebrow {
  font-family: var(--font-en);
  font-size: .74rem;
  font-weight: 600;
  letter-spacing: .22em;
  color: #5fd39a;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.hero-title {
  font-family: var(--font-mincho);
  font-size: clamp(1.9rem, 3.6vw, 2.9rem);
  font-weight: 700;
  color: #fff;
  line-height: 1.5;
  margin-bottom: 22px;
  letter-spacing: .02em;
  text-shadow: 0 2px 12px rgba(0,0,0,.3);
}
.hero-title em { font-style: normal; color: #6fe0a6; }
.hero-visual { position: relative; }
.hero-visual svg {
  width: 100%;
  height: auto;
  display: block;
  filter: drop-shadow(0 20px 40px rgba(0,0,0,.35));
}
.hero-sub {
  font-size: clamp(.95rem, 1.8vw, 1.1rem);
  color: rgba(255,255,255,.82);
  margin-bottom: 40px;
  line-height: 1.9;
}
.hero-btns {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--color-green);
  color: #fff;
  font-weight: 700;
  font-size: .95rem;
  padding: 14px 32px;
  border-radius: var(--radius);
  letter-spacing: .04em;
  transition: background var(--transition), transform var(--transition);
}
.btn-primary:hover { background: var(--color-green-dark); opacity: 1; transform: translateY(-2px); }

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: #fff;
  font-weight: 700;
  font-size: .95rem;
  padding: 13px 30px;
  border: 2px solid rgba(255,255,255,.65);
  border-radius: var(--radius);
  letter-spacing: .04em;
  transition: border-color var(--transition), background var(--transition);
}
.btn-outline:hover { border-color: #fff; background: rgba(255,255,255,.08); opacity: 1; }

/* =============================================
   Common Section Styles
   ============================================= */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 28px; }

.section-header { text-align: center; margin-bottom: 52px; }
.section-label {
  font-family: var(--font-en);
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .3em;
  color: var(--color-green);
  text-transform: uppercase;
  margin-bottom: 10px;
}
.section-title {
  font-family: var(--font-mincho);
  font-size: clamp(1.5rem, 2.8vw, 2rem);
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: .03em;
}
.section-line {
  width: 44px; height: 3px;
  background: var(--color-green);
  margin: 16px auto 0;
  border-radius: 2px;
}

/* =============================================
   Trust bar
   ============================================= */
.trust {
  background: #fff;
  border-bottom: 1px solid var(--color-border);
}
.trust-grid {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 28px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  text-align: center;
}
.trust-grid > div {
  padding: 30px 12px;
  border-right: 1px solid var(--color-border);
}
.trust-grid > div:last-child { border-right: none; }
.trust-num {
  font-family: var(--font-mincho);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-green);
  line-height: 1;
}
.trust-num small { font-size: .85rem; margin-left: 2px; }
.trust-lbl { margin-top: 8px; font-size: .78rem; color: var(--color-text-mid); }

/* =============================================
   Services
   ============================================= */
.services { padding: 96px 0; background: var(--color-bg-soft); }

.services-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 18px;
}

.service-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 30px 22px 32px;
  position: relative;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.service-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 16px 36px rgba(21,86,54,.12);
  border-color: #cfe3d8;
}

.card-number {
  font-family: var(--font-en);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-green);
  opacity: .2;
  line-height: 1;
  margin-bottom: 6px;
}

.card-icon {
  width: 52px; height: 52px;
  background: var(--color-green-light);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  font-size: 1.2rem;
  color: var(--color-green);
}

.card-title {
  font-size: .98rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 10px;
  line-height: 1.4;
}

.card-text {
  font-size: .8rem;
  color: var(--color-text-mid);
  line-height: 1.75;
  margin-bottom: 14px;
}

.card-list {
  display: flex;
  flex-direction: column;
  gap: 5px;
}
.card-list li {
  font-size: .78rem;
  color: var(--color-text-mid);
  display: flex;
  align-items: baseline;
  gap: 6px;
}
.card-list .fa-circle-dot {
  font-size: .45rem;
  color: var(--color-green);
  flex-shrink: 0;
  position: relative;
  top: -1px;
}

/* =============================================
   Strengths
   ============================================= */
.strengths { padding: 96px 0; background: var(--color-bg); }

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

.strength-item {
  display: flex;
  flex-direction: column;
  gap: 14px;
  background: #fff;
  border-radius: 10px;
  padding: 30px 24px;
  border: 1px solid var(--color-border);
  transition: box-shadow var(--transition), transform var(--transition);
}
.strength-item:hover { box-shadow: 0 12px 30px rgba(21,86,54,.1); transform: translateY(-3px); }

.strength-icon {
  width: 52px; height: 52px;
  background: var(--color-green-light);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: var(--color-green);
  flex-shrink: 0;
}

.strength-title {
  font-size: .95rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
  line-height: 1.5;
}
.strength-text { font-size: .8rem; color: var(--color-text-mid); line-height: 1.75; }

/* =============================================
   About
   ============================================= */
.about { padding: 96px 0; background: var(--color-bg-soft); }

.about-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-content .section-label { text-align: left; }
.about-content .section-title { text-align: left; }
.about-content .section-line { margin-left: 0; }

.about-text {
  margin-top: 22px;
  margin-bottom: 26px;
  font-size: .95rem;
  color: var(--color-text-mid);
  line-height: 1.95;
}

.facts { border-top: 1px solid var(--color-border); margin-bottom: 30px; }
.facts div {
  display: flex;
  gap: 18px;
  padding: 14px 0;
  border-bottom: 1px solid var(--color-border);
  font-size: .88rem;
}
.facts dt { width: 96px; color: var(--color-green); font-weight: 700; flex: none; }
.facts dd { color: var(--color-text); }

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1.5px solid var(--color-green);
  color: var(--color-green);
  font-weight: 700;
  font-size: .9rem;
  padding: 11px 28px;
  border-radius: var(--radius);
  transition: background var(--transition), color var(--transition);
}
.btn-secondary:hover { background: var(--color-green); color: #fff; opacity: 1; }

.about-photo {
  width: 100%;
  aspect-ratio: 4 / 3;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 18px 40px rgba(27, 107, 66, .16);
}
.about-photo svg {
  display: block;
  width: 100%;
  height: 100%;
}

/* =============================================
   Contact
   ============================================= */
.contact { padding: 96px 0; background: var(--color-bg-gray); }

.contact-inner {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 64px;
  align-items: start;
}

.contact-title {
  font-family: var(--font-mincho);
  font-size: clamp(1.5rem, 2.5vw, 1.8rem);
  font-weight: 700;
  color: var(--color-text);
  margin: 10px 0 0;
}
.contact-info .section-line { margin-left: 0; }

.contact-text {
  margin-top: 20px;
  font-size: .88rem;
  color: var(--color-text-mid);
  line-height: 1.85;
}

/* Form */
.contact-form { display: flex; flex-direction: column; }

/* スパム対策ハニーポット：画面・支援技術の双方から隠す */
.hp-field {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}
.form-row.single { grid-template-columns: 1fr; }

.form-group { display: flex; flex-direction: column; gap: 6px; }

.form-group label {
  font-size: .82rem;
  font-weight: 700;
  color: var(--color-text);
}
.required { color: #c0392b; margin-left: 3px; }

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-family: var(--font-ja);
  font-size: .9rem;
  color: var(--color-text);
  background: #fff;
  transition: border-color var(--transition), box-shadow var(--transition);
  appearance: none;
}
.form-group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%231A1A2E' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
}
.form-group textarea { resize: vertical; min-height: 120px; }

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-green);
  box-shadow: 0 0 0 3px rgba(27,107,66,.12);
}
.form-group.has-error input,
.form-group.has-error select,
.form-group.has-error textarea { border-color: #c0392b; }

.error-msg { font-size: .75rem; color: #c0392b; min-height: 1em; }

.form-submit { margin-top: 8px; }

.btn-submit {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--color-green);
  color: #fff;
  font-family: var(--font-ja);
  font-size: .95rem;
  font-weight: 700;
  padding: 14px 40px;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  letter-spacing: .04em;
  transition: background var(--transition), transform var(--transition);
  width: 100%;
}
.btn-submit:hover { background: var(--color-green-dark); transform: translateY(-1px); }

.form-success {
  margin-top: 16px;
  padding: 14px 16px;
  background: #e8f5e9;
  border: 1px solid #a5d6a7;
  border-radius: var(--radius);
  text-align: center;
  color: #2e7d32;
  font-size: .9rem;
}

/* =============================================
   Footer
   ============================================= */
.site-footer { background: var(--color-footer-bg); padding: 52px 28px 0; }

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 48px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,.1);
  flex-wrap: wrap;
}

.footer-logo { display: flex; align-items: center; gap: 12px; }
.footer-company {
  font-size: .95rem; font-weight: 700; color: #fff; margin-bottom: 3px;
}
.footer-company-en {
  font-family: var(--font-en); font-size: .72rem; color: rgba(255,255,255,.4);
}

.footer-info { display: flex; gap: 48px; flex-wrap: wrap; }

.footer-info-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}
.footer-info-item .fas {
  font-size: 1rem;
  color: var(--color-green);
  margin-top: 2px;
  flex-shrink: 0;
}
.footer-info-label {
  font-size: .72rem;
  color: rgba(255,255,255,.4);
  margin-bottom: 4px;
  letter-spacing: .04em;
}
.footer-info-value { color: rgba(255,255,255,.75); font-size: .85rem; }
.footer-info-value a { color: rgba(255,255,255,.75); }
.footer-info-value a:hover { color: #fff; opacity: 1; }

.footer-bottom {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 16px 0;
  text-align: right;
  font-size: .75rem;
  color: rgba(255,255,255,.35);
  font-family: var(--font-en);
}

/* =============================================
   Fade-in animation
   ============================================= */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .6s ease, transform .6s ease;
}
.fade-in.is-visible { opacity: 1; transform: translateY(0); }

/* =============================================
   Responsive — Tablet ≤1024px
   ============================================= */
@media (max-width: 1024px) {
  .hero-content { grid-template-columns: 1fr; gap: 36px; }
  .hero-copy { text-align: center; }
  .hero-eyebrow { justify-content: center; }
  .hero-btns { justify-content: center; }
  .hero-visual { max-width: 400px; margin: 0 auto; width: 100%; order: -1; }
  .services-grid { grid-template-columns: repeat(3, 1fr); }
  .strengths-grid { grid-template-columns: repeat(2, 1fr); }
  .about-inner { grid-template-columns: 1fr; gap: 40px; }
  .about-image { max-width: 480px; margin: 0 auto; width: 100%; }
  .contact-inner { grid-template-columns: 1fr; gap: 32px; }
  .footer-inner { flex-direction: column; gap: 32px; }
  .footer-bottom { text-align: center; }
}

/* =============================================
   Responsive — Mobile ≤767px
   ============================================= */
@media (max-width: 767px) {
  :root { --header-height: 64px; }

  .header-cta { display: none; }
  .nav-toggle { display: flex; }

  .primary-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background: #fff;
    padding: 16px 28px 24px;
    display: none;
    border-top: 1px solid var(--color-border);
    box-shadow: 0 8px 20px rgba(0,0,0,.08);
    margin-left: 0;
  }
  .primary-nav.is-open { display: block; }
  .primary-nav ul { flex-direction: column; gap: 0; }
  .primary-nav li { border-bottom: 1px solid var(--color-border); }
  .primary-nav a { display: block; padding: 14px 4px; font-size: .95rem; }
  .primary-nav a::after { display: none; }

  .hero-title br { display: none; }
  .hero-content { padding: 56px 28px 64px; }
  .hero-btns { flex-direction: column; align-items: stretch; gap: 12px; }
  .hero-btns .btn-primary, .hero-btns .btn-outline { justify-content: center; }
  .hero-visual { max-width: 300px; }

  .trust-grid { grid-template-columns: repeat(2, 1fr); }
  .trust-grid > div { padding: 24px 12px; }
  .trust-grid > div:nth-child(2) { border-right: none; }
  .trust-grid > div:nth-child(1), .trust-grid > div:nth-child(2) { border-bottom: 1px solid var(--color-border); }

  .services-grid { grid-template-columns: 1fr; gap: 16px; }
  .strengths-grid { grid-template-columns: 1fr; gap: 14px; }

  .form-row { grid-template-columns: 1fr; }

  .services, .strengths, .about, .contact { padding: 64px 0; }
  .section-header { margin-bottom: 36px; }

  .footer-info { flex-direction: column; gap: 24px; }
}