*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg-primary: #ffffff;
  --bg-secondary: #f5f8fa;
  --bg-card: #ffffff;
  --text-primary: #0a1f2c;
  --text-secondary: #4a6275;
  --text-body: #2d4453;
  --text-muted: #8a9eaf;
  --accent: #4a96b4;
  --accent-light: #6bb0ca;
  --accent-dim: #3a7d97;
  --accent-glow: rgba(74, 150, 180, 0.12);
  --accent-glow-strong: rgba(74, 150, 180, 0.22);
  --border: #e2e8ee;
  --border-light: #cdd8e0;
  --font-en: 'Outfit', sans-serif;
  --font-ja: 'Noto Sans JP', sans-serif;
}

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

body {
  font-family: var(--font-ja);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* ===== HEADER ===== */
.header {
  position: fixed; top: 0; left: 0; width: 100%; z-index: 100;
  padding: 16px 40px;
  display: flex; align-items: center; justify-content: space-between;
  transition: background 0.4s, backdrop-filter 0.4s;
}

.header.scrolled {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.logo-link { display: flex; align-items: center; }
.logo-img { height: 48px; width: auto; }

.header-nav { display: flex; gap: 32px; }
.header-nav a {
  font-family: var(--font-en); font-size: 0.78rem; font-weight: 500;
  letter-spacing: 0.15em; color: var(--text-secondary);
  transition: color 0.3s; position: relative;
}
.header-nav a::after {
  content: ''; position: absolute; left: 0; bottom: -6px;
  width: 100%; height: 1px; background: var(--accent);
  transform: scaleX(0); transform-origin: right; transition: transform 0.3s;
}
.header-nav a:hover { color: var(--accent); }
.header-nav a:hover::after { transform: scaleX(1); transform-origin: left; }

.logo-placeholder {
  height: 32px; padding: 0 16px;
  display: flex; align-items: center; justify-content: center;
  border: 1px dashed var(--border-light); border-radius: 6px;
  font-family: var(--font-en); font-size: 0.65rem;
  letter-spacing: 0.1em; color: var(--text-muted);
}

.header-contact {
  display: flex; align-items: center; gap: 8px;
  font-family: var(--font-en); font-size: 0.8rem; font-weight: 500; letter-spacing: 0.1em;
  color: var(--text-primary); border: 1px solid var(--border-light);
  padding: 10px 24px; border-radius: 100px; transition: all 0.3s; cursor: pointer;
}

.header-contact:hover {
  border-color: var(--accent); color: var(--accent);
  box-shadow: 0 0 20px var(--accent-glow);
}

.header-contact svg { width: 14px; height: 14px; transition: transform 0.3s; }
.header-contact:hover svg { transform: translateX(3px); }

/* ===== HAMBURGER & MOBILE MENU ===== */
.menu-toggle {
  display: none; flex-direction: column; justify-content: space-between;
  width: 32px; height: 22px; background: none; border: none;
  padding: 0; cursor: pointer; position: relative; z-index: 102;
}

.menu-toggle span {
  display: block; width: 100%; height: 2px; border-radius: 2px;
  background: var(--text-primary);
  transition: transform 0.3s ease, opacity 0.2s ease;
}

.menu-toggle.open span:nth-child(1) { transform: translateY(10px) rotate(45deg); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: translateY(-10px) rotate(-45deg); }

.mobile-menu {
  position: fixed; top: 0; left: 0; width: 100%; height: 100vh;
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(24px); -webkit-backdrop-filter: blur(24px);
  z-index: 99;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; visibility: hidden; pointer-events: none;
  transition: opacity 0.35s ease, visibility 0.35s ease;
}

.mobile-menu.open {
  opacity: 1; visibility: visible; pointer-events: auto;
}

.mobile-menu-nav {
  display: flex; flex-direction: column; gap: 36px; text-align: center;
}

.mobile-menu-nav a {
  font-family: var(--font-en); font-size: 1.6rem; font-weight: 500;
  letter-spacing: 0.18em; color: var(--text-primary);
  transition: color 0.3s; position: relative;
}

.mobile-menu-nav a:hover { color: var(--accent); }

/* ===== HERO ===== */
.hero {
  min-height: 100vh; display: flex; flex-direction: row;
  justify-content: center; align-items: center; gap: 80px;
  padding: 120px 8vw; position: relative; overflow: hidden;
}

.hero-content {
  flex: 0 1 560px; display: flex; flex-direction: column; align-items: flex-start;
  position: relative; z-index: 2;
}

.hero-visual {
  flex: 0 0 auto; width: 100%; max-width: 360px;
  display: flex; align-items: center; justify-content: center;
  position: relative; z-index: 1;
  opacity: 0; animation: fadeUp 1.2s 0.4s forwards;
}

.hero-visual img {
  width: 100%; height: auto;
}

.hero::before {
  content: ''; position: absolute; top: -20%; right: -15%; width: 70vw; height: 70vw;
  background: radial-gradient(circle, rgba(74,150,180,0.10) 0%, rgba(74,150,180,0.04) 40%, transparent 70%);
  pointer-events: none;
}

.hero::after {
  content: ''; position: absolute; bottom: -10%; left: -10%; width: 40vw; height: 40vw;
  background: radial-gradient(circle, rgba(74,150,180,0.06) 0%, transparent 60%);
  pointer-events: none;
}

.hero-tagline {
  font-size: clamp(2rem, 5vw, 3.8rem); font-weight: 300; line-height: 1.6;
  letter-spacing: 0.08em; margin-bottom: 40px; color: var(--text-primary);
  opacity: 0; animation: fadeUp 1s 0.3s forwards;
}

.hero-tagline em {
  font-style: normal;
  background: linear-gradient(135deg, var(--accent-light), var(--accent));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}

.hero-sub {
  font-size: clamp(0.9rem, 1.5vw, 1.1rem); color: var(--text-secondary);
  font-weight: 400; letter-spacing: 0.06em; line-height: 2;
  opacity: 0; animation: fadeUp 1s 0.6s forwards;
}

.hero-cta {
  margin-top: 60px; display: inline-flex; align-items: center; gap: 12px;
  font-family: var(--font-en); font-size: 0.85rem; font-weight: 500; letter-spacing: 0.12em;
  color: #fff; background: var(--accent);
  padding: 16px 40px; border-radius: 100px; border: none; cursor: pointer;
  transition: all 0.3s; opacity: 0; animation: fadeUp 1s 0.9s forwards; text-decoration: none;
}

.hero-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 40px var(--accent-glow-strong); }
.hero-cta svg { width: 16px; height: 16px; transition: transform 0.3s; }
.hero-cta:hover svg { transform: translateX(4px); }

.hero-scroll {
  position: absolute; bottom: 40px; left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  font-family: var(--font-en); font-size: 0.65rem; letter-spacing: 0.2em;
  color: var(--text-muted); opacity: 0; animation: heroScrollIn 1s 1.2s forwards;
}

@keyframes heroScrollIn {
  from { opacity: 0; transform: translate(-50%, 30px); }
  to { opacity: 1; transform: translate(-50%, 0); }
}

.hero-scroll::after {
  content: ''; width: 1px; height: 40px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  animation: scrollLine 2s infinite;
}

@keyframes scrollLine {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  51% { transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ===== SECTION COMMON ===== */
.section { padding: 120px 8vw; }

.section-label {
  font-family: var(--font-en); font-size: 0.7rem; font-weight: 600;
  letter-spacing: 0.25em; color: var(--accent); text-transform: uppercase;
  margin: 0 0 60px; display: flex; align-items: center; gap: 16px;
}

.section-label::before {
  content: ''; width: 40px; height: 1px;
  background: linear-gradient(to right, var(--accent), transparent);
}

/* ===== SERVICES ===== */
.services { background: var(--bg-secondary); }

.service-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 1px; background: var(--border); border-radius: 16px; overflow: hidden;
}

.service-card {
  background: var(--bg-primary); padding: 50px 40px;
  position: relative; overflow: hidden; transition: all 0.5s;
}

.service-card::before {
  content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 2px;
  background: linear-gradient(to right, var(--accent), var(--accent-dim));
  transform: scaleX(0); transform-origin: left; transition: transform 0.5s;
}

.service-card:hover::before { transform: scaleX(1); }

.service-card::after {
  content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 100%;
  background: radial-gradient(ellipse at top center, var(--accent-glow) 0%, transparent 70%);
  opacity: 0; transition: opacity 0.5s; pointer-events: none;
}

.service-card:hover::after { opacity: 1; }
.service-card:hover { background: var(--bg-card); }

.service-num {
  font-family: var(--font-en); font-size: 0.75rem; font-weight: 300;
  color: var(--accent); letter-spacing: 0.15em; margin-bottom: 24px; opacity: 0.6;
}

.service-title {
  font-family: var(--font-en); font-size: 1.5rem; font-weight: 600;
  letter-spacing: 0.08em; margin-bottom: 30px; color: var(--text-primary);
}

.service-desc {
  font-size: 0.88rem; color: var(--text-body); line-height: 2;
  font-weight: 400; margin-bottom: 30px; position: relative; z-index: 1;
}

.service-list-title {
  font-size: 0.78rem; color: var(--text-secondary); letter-spacing: 0.1em;
  margin-bottom: 16px; font-weight: 500; position: relative; z-index: 1;
}

.service-list {
  display: flex; flex-wrap: wrap; gap: 6px; position: relative; z-index: 1;
}

.service-list li {
  font-size: 0.78rem; color: var(--text-body);
  background: rgba(74,150,180,0.06); border: 1px solid var(--border-light);
  padding: 5px 14px; border-radius: 100px; font-weight: 400; transition: all 0.3s;
}

.service-card:hover .service-list li { border-color: rgba(74,150,180,0.3); }

/* ===== SERVICE BANNER (Claude導入支援) ===== */
.service-banner {
  display: block; position: relative;
  margin-top: 40px; border-radius: 16px;
  overflow: hidden; isolation: isolate;
  background: var(--bg-card);
  transition: transform 0.3s, box-shadow 0.3s;
}
.service-banner-bg {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; z-index: 0; user-select: none; pointer-events: none;
}
.service-banner::before {
  content: ''; position: absolute; inset: 0; z-index: 1; pointer-events: none;
  background: linear-gradient(90deg,
    rgba(255,255,255,0.78) 0%,
    rgba(255,255,255,0.45) 50%,
    rgba(255,255,255,0.0) 100%);
}
.service-banner:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 50px var(--accent-glow-strong);
}

.service-banner-overlay {
  position: relative; z-index: 2;
  display: flex; align-items: center; justify-content: space-between;
  gap: 32px; padding: 44px 48px; min-height: 200px;
}

.service-banner-text {
  display: flex; flex-direction: column; gap: 10px; max-width: 62%;
}
.service-banner-eyebrow {
  font-family: var(--font-en); font-size: 0.7rem; font-weight: 600;
  letter-spacing: 0.22em; color: var(--accent-dim);
}
.service-banner-title {
  font-size: 1.7rem; font-weight: 700; letter-spacing: 0.06em;
  line-height: 1.4; color: var(--text-primary);
}
.service-banner-desc {
  font-size: 0.85rem; line-height: 1.85; color: var(--text-body);
}
.service-banner-cta {
  flex: 0 0 auto; display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-en); font-size: 0.8rem; font-weight: 600; letter-spacing: 0.12em;
  padding: 12px 24px; border-radius: 100px;
  background: rgba(255,255,255,0.9); border: 1px solid var(--accent);
  color: var(--accent-dim); white-space: nowrap;
  transition: background 0.3s, color 0.3s;
}
.service-banner:hover .service-banner-cta {
  background: var(--accent); color: #fff;
}
.service-banner-cta svg { width: 14px; height: 14px; transition: transform 0.3s; }
.service-banner:hover .service-banner-cta svg { transform: translateX(4px); }

/* ===== CLIENTS ===== */
.clients { text-align: center; }

.clients-logos {
  display: flex; justify-content: center; align-items: center;
  gap: 60px; flex-wrap: wrap; margin-top: 40px;
}

.client-logo {
  width: 160px; height: 90px; background: #ffffff; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  padding: 16px; transition: all 0.3s; border: 1px solid var(--border);
}

.client-logo:hover {
  border-color: var(--border-light);
  box-shadow: 0 0 24px var(--accent-glow-strong);
  transform: translateY(-2px);
}

.client-logo span {
  font-family: var(--font-en); font-size: 0.7rem; font-weight: 500;
  letter-spacing: 0.1em; color: var(--text-secondary);
}

.client-logo img {
  max-width: 100%; max-height: 100%; object-fit: contain;
}

/* ===== COMPANY (会社概要) ===== */
.company { background: var(--bg-secondary); }

.company-grid {
  max-width: 640px;
}

.company-table {
  width: 100%;
  border-collapse: collapse;
}

.company-table tr {
  border-bottom: 1px solid var(--border);
}

.company-table tr:last-child {
  border-bottom: none;
}

.company-table th,
.company-table td {
  padding: 20px 0;
  text-align: left;
  vertical-align: top;
  font-size: 0.9rem;
}

.company-table th {
  width: 130px;
  color: var(--text-secondary);
  font-weight: 500;
  letter-spacing: 0.04em;
  white-space: nowrap;
  padding-right: 24px;
}

.company-table td {
  color: var(--text-primary);
  font-weight: 400;
  line-height: 1.9;
}

.company-table .company-name-en {
  font-family: var(--font-en);
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-weight: 400;
  letter-spacing: 0.06em;
  display: block;
  margin-top: 2px;
}

.company-table .company-role {
  font-size: 0.8rem;
  color: var(--text-secondary);
  display: block;
  margin-top: 2px;
}

.company-table .company-business-item {
  display: block;
  position: relative;
  padding-left: 16px;
}

.company-table .company-business-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 12px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.5;
}

.company-note {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ===== CONTACT ===== */
.contact { background: var(--bg-primary); }
.contact-inner { max-width: 640px; }

.contact-heading {
  font-size: clamp(1.6rem, 3vw, 2.4rem); font-weight: 300;
  letter-spacing: 0.06em; margin-bottom: 50px; color: var(--text-primary);
}

.form-group { margin-bottom: 28px; }

.form-label {
  display: block; font-size: 0.82rem; font-weight: 500;
  color: var(--text-body); margin-bottom: 8px; letter-spacing: 0.04em;
}

.form-label .required {
  color: var(--accent); font-size: 0.65rem; margin-left: 6px;
  font-family: var(--font-en); font-weight: 600;
}

.form-input, .form-textarea {
  width: 100%; background: var(--bg-secondary); border: 1px solid var(--border-light);
  border-radius: 8px; padding: 14px 18px; font-family: var(--font-ja);
  font-size: 0.9rem; color: var(--text-primary);
  transition: border-color 0.3s, box-shadow 0.3s; outline: none;
}

.form-input:focus, .form-textarea:focus {
  border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-input::placeholder, .form-textarea::placeholder { color: var(--text-muted); }
.form-textarea { min-height: 160px; resize: vertical; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }

/* ===== Radio Group ===== */
.form-radio-group { border: none; padding: 0; margin-bottom: 28px; }
.form-radio-group legend { padding: 0; margin-bottom: 14px; }

.radio-list {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px;
}

.radio-item {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 16px; cursor: pointer;
  background: var(--bg-secondary);
  border: 1px solid var(--border-light);
  border-radius: 8px;
  font-size: 0.85rem; color: var(--text-body);
  transition: border-color 0.25s, background 0.25s, color 0.25s;
}

.radio-item:hover { border-color: var(--accent); color: var(--text-primary); }

.radio-item input[type="radio"] {
  appearance: none; -webkit-appearance: none;
  width: 18px; height: 18px; flex: 0 0 18px;
  border: 1.5px solid var(--border-light);
  border-radius: 50%; background: transparent;
  cursor: pointer; position: relative;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.radio-item input[type="radio"]:checked {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.radio-item input[type="radio"]:checked::after {
  content: ''; position: absolute; top: 50%; left: 50%;
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--accent); transform: translate(-50%, -50%);
}

.radio-item:has(input[type="radio"]:checked) {
  border-color: var(--accent);
  background: rgba(74, 150, 180, 0.08);
  color: var(--text-primary);
}

/* ===== Privacy Agreement ===== */
.form-agree { margin-top: 8px; margin-bottom: 12px; }
.agree-item {
  display: flex; align-items: flex-start; gap: 10px; cursor: pointer;
  font-size: 0.85rem; color: var(--text-body); line-height: 1.7;
}
.agree-item input[type="checkbox"] {
  appearance: none; -webkit-appearance: none;
  width: 18px; height: 18px; flex: 0 0 18px; margin-top: 3px;
  border: 1.5px solid var(--border-light); border-radius: 4px;
  background: transparent; cursor: pointer; position: relative;
  transition: border-color 0.2s, background 0.2s, box-shadow 0.2s;
}
.agree-item input[type="checkbox"]:checked {
  border-color: var(--accent); background: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.agree-item input[type="checkbox"]:checked::after {
  content: ''; position: absolute; top: 2px; left: 5px;
  width: 5px; height: 10px; border: solid #fff;
  border-width: 0 2px 2px 0; transform: rotate(45deg);
}
.agree-link {
  color: var(--accent); text-decoration: underline;
  text-underline-offset: 3px; transition: color 0.2s;
}
.agree-link:hover { color: var(--accent-dim); }

.form-submit {
  margin-top: 40px; display: inline-flex; align-items: center; gap: 12px;
  font-family: var(--font-en); font-size: 0.85rem; font-weight: 500; letter-spacing: 0.12em;
  color: #fff; background: var(--accent);
  padding: 16px 48px; border-radius: 100px; border: none; cursor: pointer; transition: all 0.3s;
}

.form-submit:hover { transform: translateY(-2px); box-shadow: 0 8px 40px var(--accent-glow-strong); }
.form-submit svg { width: 16px; height: 16px; transition: transform 0.3s; }
.form-submit:hover svg { transform: translateX(4px); }

/* ===== FOOTER ===== */
.footer {
  padding: 60px 8vw; border-top: 1px solid var(--border);
  display: flex; justify-content: space-between; align-items: flex-end;
  flex-wrap: wrap; gap: 40px;
}

.footer-logo { margin-bottom: 20px; }
.footer-logo .logo-img { height: 40px; width: auto; }
.footer-logo .logo-placeholder { height: 40px; font-size: 0.6rem; }

.footer-location {
  font-size: 0.82rem; color: var(--text-body); font-weight: 400; line-height: 1.8;
}

.footer-right { text-align: right; }
.footer-nav { display: flex; gap: 30px; margin-bottom: 16px; }

.footer-nav a {
  font-family: var(--font-en); font-size: 0.75rem; font-weight: 500;
  letter-spacing: 0.1em; color: var(--text-secondary); transition: color 0.3s;
}

.footer-nav a:hover { color: var(--accent); }

.footer-copy {
  font-family: var(--font-en); font-size: 0.7rem;
  color: var(--text-muted); letter-spacing: 0.08em;
}

/* ===== ANIMATIONS ===== */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

.reveal {
  opacity: 0; transform: translateY(40px);
  transition: opacity 0.8s, transform 0.8s;
}

.reveal.visible { opacity: 1; transform: translateY(0); }

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .header { padding: 16px 24px; }
  .header-nav { display: none; }
  .header-contact { display: none; }
  .menu-toggle { display: flex; }
  .hero {
    flex-direction: column; align-items: flex-start;
    justify-content: center; gap: 32px;
    padding: 100px 6vw 140px;
  }
  .hero-content { display: contents; }
  .hero-tagline { order: 1; margin-bottom: 0; }
  .hero-sub { order: 2; }
  .hero-visual { order: 3; max-width: 280px; align-self: center; }
  .hero-cta { order: 4; margin-top: 0; align-self: center; }
  .section { padding: 80px 6vw; }
  .service-grid { grid-template-columns: 1fr; border-radius: 12px; }
  .service-card { padding: 40px 30px; }
  .service-banner::before {
    background: linear-gradient(180deg,
      rgba(255,255,255,0.85) 0%,
      rgba(255,255,255,0.6) 60%,
      rgba(255,255,255,0.3) 100%);
  }
  .service-banner-overlay {
    flex-direction: column; align-items: flex-start;
    gap: 18px; padding: 28px 24px; min-height: 220px;
  }
  .service-banner-text { max-width: 100%; }
  .service-banner-title { font-size: 1.35rem; }
  .form-row { grid-template-columns: 1fr; }
  .radio-list { grid-template-columns: 1fr; }
  .footer { flex-direction: column; align-items: flex-start; }
  .footer-right { text-align: left; }
  .clients-logos { gap: 30px; }
  .client-logo { width: 140px; height: 80px; }
}

@media (max-width: 600px) {
  .hero { padding: 100px 24px 140px; min-height: 90vh; }
  .hero-visual { max-width: 220px; }
  .section { padding: 60px 24px; }
  .header { padding: 14px 20px; }
  .logo-img { height: 40px; }
  .hero-tagline {
    font-size: clamp(2.4rem, 9vw, 3.2rem);
    font-weight: 400;
    line-height: 1.45;
    letter-spacing: 0.04em;
    margin-bottom: 24px;
  }
  .hero-sub { font-size: 0.95rem; }
  .service-card { padding: 30px 24px; }
  .footer { padding: 40px 24px; }
  .footer-logo .logo-img { height: 34px; }
  .footer-nav { gap: 20px; }
  .company-table th { width: 90px; font-size: 0.82rem; }
  .company-table td { font-size: 0.85rem; }
  .client-logo { width: 120px; height: 70px; padding: 12px; }
  .mobile-menu-nav a { font-size: 1.3rem; }
}