/* ===== CSS Variables ===== */
:root {
  --navy: #0a0e1a;
  --navy-mid: #0f1628;
  --navy-light: #1a2540;
  --blue: #3a8fd4;
  --blue-light: #5ba8e8;
  --blue-dark: #2870b5;
  --white: #ffffff;
  --gray-100: #f0f4f8;
  --gray-300: #cbd5e1;
  --gray-500: #64748b;
  --text: #e2e8f0;
  --text-muted: #94a3b8;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
  --shadow-blue: 0 4px 24px rgba(58, 143, 212, 0.25);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 72px;
}

body {
  font-family: 'Noto Sans JP', 'Inter', sans-serif;
  background-color: var(--navy);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

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

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

/* ===== Header ===== */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: 72px;
  background: rgba(10, 14, 26, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(58, 143, 212, 0.12);
  transition: background var(--transition), box-shadow var(--transition);
}

.header.scrolled {
  background: rgba(10, 14, 26, 0.96);
  box-shadow: 0 2px 20px rgba(0,0,0,0.4);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-img {
  height: 40px;
  width: auto;
  object-fit: contain;
}

.logo-img--sm { height: 32px; }

.logo-text {
  font-size: 15px;
  font-weight: 700;
  color: var(--white);
  letter-spacing: 0.02em;
}

.logo-text--sm { font-size: 13px; }

.nav-list {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}

.nav-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  padding: 8px 14px;
  border-radius: 8px;
  transition: color var(--transition), background var(--transition);
}

.nav-link:hover {
  color: var(--white);
  background: rgba(58, 143, 212, 0.1);
}

.nav-link--cta {
  background: var(--blue);
  color: var(--white) !important;
  padding: 8px 18px;
}

.nav-link--cta:hover {
  background: var(--blue-light) !important;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 120px 0 80px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(58, 143, 212, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(58, 143, 212, 0.06) 1px, transparent 1px);
  background-size: 60px 60px;
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.25;
}

.hero-orb--1 {
  width: 600px; height: 600px;
  background: radial-gradient(circle, var(--blue) 0%, transparent 70%);
  top: -150px; right: -100px;
  animation: pulse 8s ease-in-out infinite;
}

.hero-orb--2 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, #1e4fa0 0%, transparent 70%);
  bottom: -100px; left: -80px;
  animation: pulse 10s ease-in-out infinite reverse;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 0.25; }
  50% { transform: scale(1.1); opacity: 0.35; }
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 760px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-block;
  font-size: 12px;
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--blue-light);
  border: 1px solid rgba(58, 143, 212, 0.4);
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 28px;
  background: rgba(58, 143, 212, 0.08);
}

.hero-title {
  font-size: clamp(36px, 6vw, 68px);
  font-weight: 900;
  line-height: 1.25;
  color: var(--white);
  letter-spacing: -0.01em;
  margin-bottom: 28px;
}

.hero-sub {
  font-size: clamp(15px, 2vw, 18px);
  color: var(--text-muted);
  line-height: 1.9;
  margin-bottom: 44px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 700;
  padding: 14px 32px;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  letter-spacing: 0.02em;
}

.btn--primary {
  background: var(--blue);
  color: var(--white);
  box-shadow: var(--shadow-blue);
}

.btn--primary:hover {
  background: var(--blue-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(58, 143, 212, 0.4);
}

.btn--outline {
  background: transparent;
  color: var(--white);
  border: 1.5px solid rgba(255,255,255,0.25);
}

.btn--outline:hover {
  border-color: var(--blue-light);
  color: var(--blue-light);
  background: rgba(58, 143, 212, 0.08);
  transform: translateY(-2px);
}

.btn--full { width: 100%; }

/* ===== Scroll Down ===== */
.scroll-down {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px; height: 40px;
}

.scroll-down__icon {
  display: block;
  width: 18px; height: 18px;
  border-right: 2px solid rgba(255,255,255,0.4);
  border-bottom: 2px solid rgba(255,255,255,0.4);
  transform: rotate(45deg);
  animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
  0%, 100% { transform: rotate(45deg) translateY(0); opacity: 0.6; }
  50% { transform: rotate(45deg) translateY(6px); opacity: 1; }
}

/* ===== Section Common ===== */
.section {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-label {
  display: inline-block;
  font-size: 12px;
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--blue);
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 900;
  color: var(--white);
  margin-bottom: 16px;
  line-height: 1.3;
}

.section-desc {
  font-size: 16px;
  color: var(--text-muted);
}

/* ===== Business ===== */
.business {
  background: var(--navy-mid);
}

.business-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

.business-card {
  background: var(--navy-light);
  border: 1px solid rgba(58, 143, 212, 0.12);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.business-card:hover {
  transform: translateY(-6px);
  border-color: rgba(58, 143, 212, 0.35);
  box-shadow: var(--shadow-blue);
}

.business-card__icon {
  width: 52px; height: 52px;
  background: rgba(58, 143, 212, 0.15);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.business-card__icon svg {
  width: 26px; height: 26px;
  color: var(--blue-light);
}

.business-card__title {
  font-size: 18px;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 12px;
}

.business-card__text {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
}

.business-features {
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: rgba(58, 143, 212, 0.08);
  border: 1px solid rgba(58, 143, 212, 0.12);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.business-feature {
  display: flex;
  align-items: flex-start;
  gap: 24px;
  padding: 28px 32px;
  background: var(--navy-mid);
  transition: background var(--transition);
}

.business-feature:hover { background: var(--navy-light); }

.feature-num {
  font-size: 24px;
  font-family: 'Inter', sans-serif;
  font-weight: 700;
  color: var(--blue);
  opacity: 0.6;
  min-width: 36px;
  padding-top: 2px;
}

.feature-body h4 {
  font-size: 17px;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 6px;
}

.feature-body p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
}

/* ===== About ===== */
.about {
  background: var(--navy);
}

.about-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.about-message {
  background: var(--navy-light);
  border: 1px solid rgba(58, 143, 212, 0.12);
  border-radius: var(--radius-lg);
  padding: 40px;
}

.about-message__title {
  font-size: 20px;
  font-weight: 700;
  color: var(--blue-light);
  margin-bottom: 20px;
}

.about-message__text {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 2;
  margin-bottom: 24px;
}

.about-message__sign {
  font-size: 15px;
  font-weight: 700;
  color: var(--white);
  text-align: right;
  border-top: 1px solid rgba(58, 143, 212, 0.15);
  padding-top: 20px;
}

.about-table-wrap {
  background: var(--navy-light);
  border: 1px solid rgba(58, 143, 212, 0.12);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

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

.about-table tr {
  border-bottom: 1px solid rgba(58, 143, 212, 0.08);
}

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

.about-table th,
.about-table td {
  padding: 20px 28px;
  font-size: 15px;
  text-align: left;
  vertical-align: top;
}

.about-table th {
  color: var(--text-muted);
  font-weight: 500;
  white-space: nowrap;
  width: 130px;
}

.about-table td {
  color: var(--white);
  font-weight: 600;
}

/* ===== Contact ===== */
.contact {
  background: var(--navy-mid);
}

.contact-inner {
  max-width: 640px;
  margin: 0 auto;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

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

.form-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}

.required {
  color: #f87171;
  margin-left: 4px;
}

.form-input,
.form-textarea {
  background: var(--navy-light);
  border: 1.5px solid rgba(58, 143, 212, 0.2);
  border-radius: var(--radius);
  padding: 14px 18px;
  font-size: 15px;
  font-family: inherit;
  color: var(--white);
  transition: border-color var(--transition), box-shadow var(--transition);
  resize: vertical;
  width: 100%;
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--text-muted);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(58, 143, 212, 0.15);
}

/* ===== Thank You ===== */
.thank-you {
  text-align: center;
  padding: 60px 40px;
  background: var(--navy-light);
  border: 1px solid rgba(58, 143, 212, 0.2);
  border-radius: var(--radius-lg);
}

.thank-you__icon {
  width: 64px; height: 64px;
  background: rgba(58, 143, 212, 0.15);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
}

.thank-you__icon svg {
  width: 32px; height: 32px;
  color: var(--blue-light);
}

.thank-you__title {
  font-size: 22px;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 12px;
}

.thank-you__text {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.8;
}

/* ===== Footer ===== */
.footer {
  background: var(--navy);
  border-top: 1px solid rgba(58, 143, 212, 0.1);
  padding: 48px 0 32px;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.footer-nav {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  justify-content: center;
}

.footer-nav a {
  font-size: 13px;
  color: var(--text-muted);
  transition: color var(--transition);
}

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

.footer-copy {
  font-size: 12px;
  color: var(--text-muted);
  opacity: 0.6;
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .business-cards {
    grid-template-columns: 1fr;
  }

  .about-inner {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-list {
    display: none;
    position: fixed;
    top: 72px; left: 0; right: 0;
    background: rgba(10, 14, 26, 0.98);
    flex-direction: column;
    padding: 24px 24px 32px;
    border-bottom: 1px solid rgba(58, 143, 212, 0.12);
    gap: 4px;
  }

  .nav-list.open { display: flex; }

  .nav-link {
    font-size: 16px;
    padding: 12px 16px;
    width: 100%;
  }

  .nav-link--cta { text-align: center; margin-top: 8px; }

  .section { padding: 72px 0; }

  .section-header { margin-bottom: 44px; }

  .business-feature { padding: 20px 24px; gap: 16px; }

  .about-message { padding: 28px 24px; }

  .about-table th,
  .about-table td { padding: 16px 20px; font-size: 14px; }

  .about-table th { width: 110px; }

  .br-pc { display: none; }
}

@media (max-width: 480px) {
  .hero-actions { flex-direction: column; align-items: center; }
  .btn { width: 100%; max-width: 280px; }
}