/* =============================================
   安洋株式会社 - メインスタイルシート
   ============================================= */

/* ---- CSS 変数 ---- */
:root {
  --color-primary: #1a4b8c;
  --color-primary-dark: #0d3267;
  --color-primary-light: #2d6bc4;
  --color-accent: #e85d04;
  --color-accent-light: #f48c06;
  --color-text: #1a1a2e;
  --color-text-light: #555;
  --color-text-muted: #888;
  --color-bg: #f8f9fc;
  --color-bg-white: #ffffff;
  --color-bg-section: #f0f4fb;
  --color-border: #e0e6f0;
  --font-sans: 'Noto Sans JP', sans-serif;
  --font-serif: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'Yu Gothic', sans-serif;
  --shadow-sm: 0 2px 8px rgba(26, 75, 140, 0.08);
  --shadow-md: 0 4px 20px rgba(26, 75, 140, 0.12);
  --shadow-lg: 0 8px 40px rgba(26, 75, 140, 0.15);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --transition: 0.3s ease;
  --header-height: 72px;
}

/* ---- リセット & ベース ---- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text);
  background-color: var(--color-bg-white);
  overflow-x: hidden;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--color-primary-light);
}

ul {
  list-style: none;
}

/* ---- ユーティリティ ---- */
.container {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

.pc-only {
  display: block;
}

/* ---- ボタン ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 15px;
  font-weight: 600;
  font-family: var(--font-sans);
  cursor: pointer;
  border: 2px solid transparent;
  transition: all var(--transition);
  white-space: nowrap;
  text-decoration: none;
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}

.btn-primary:hover {
  background: var(--color-accent-light);
  border-color: var(--color-accent-light);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(232, 93, 4, 0.35);
}

.btn-outline {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,0.7);
}

.btn-outline:hover {
  background: rgba(255,255,255,0.15);
  border-color: #fff;
  color: #fff;
  transform: translateY(-2px);
}

.btn-full {
  width: 100%;
  justify-content: center;
}

/* ---- セクション共通 ---- */
.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(26px, 4vw, 38px);
  font-weight: 600;
  color: var(--color-primary-dark);
  margin-bottom: 16px;
  line-height: 1.4;
}

.section-desc {
  font-size: 16px;
  color: var(--color-text-light);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.8;
}

/* =============================================
   ヘッダー
   ============================================= */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  display: flex;
  align-items: center;
  background: transparent;
  transition: background var(--transition), box-shadow var(--transition);
}

.site-header.scrolled {
  background: rgba(255, 255, 255, 0.97);
  box-shadow: var(--shadow-sm);
}

.header-inner {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* ロゴ */
.logo, .footer-logo {
  display: flex;
  align-items: baseline;
  gap: 6px;
  text-decoration: none;
}

.logo-text-main {
  font-family: var(--font-serif);
  font-size: 26px;
  font-weight: 600;
  color: #fff;
  transition: color var(--transition);
}

.logo-text-sub {
  font-size: 13px;
  color: rgba(255,255,255,0.8);
  transition: color var(--transition);
}

.site-header.scrolled .logo-text-main {
  color: var(--color-primary-dark);
}

.site-header.scrolled .logo-text-sub {
  color: var(--color-text-light);
}

/* ナビゲーション */
.global-nav ul {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  display: block;
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 500;
  color: rgba(255,255,255,0.9);
  border-radius: 50px;
  transition: all var(--transition);
  text-decoration: none;
}

.nav-link:hover,
.nav-link.active {
  color: #fff;
  background: rgba(255,255,255,0.15);
}

.site-header.scrolled .nav-link {
  color: var(--color-text);
}

.site-header.scrolled .nav-link:hover,
.site-header.scrolled .nav-link.active {
  color: var(--color-primary);
  background: var(--color-bg-section);
}

/* ハンバーガーボタン */
.hamburger-btn {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  z-index: 1001;
}

.hamburger-btn span {
  display: block;
  width: 26px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: all var(--transition);
}

.site-header.scrolled .hamburger-btn span {
  background: var(--color-primary-dark);
}

.hamburger-btn.is-open span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}
.hamburger-btn.is-open span:nth-child(2) {
  opacity: 0;
}
.hamburger-btn.is-open span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* =============================================
   ヒーローセクション
   ============================================= */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 50%, #1e6fba 100%);
  overflow: hidden;
}

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

.shape {
  position: absolute;
  border-radius: 50%;
  opacity: 0.08;
  background: #fff;
}

.shape-1 {
  width: 600px;
  height: 600px;
  top: -200px;
  right: -150px;
  animation: float 8s ease-in-out infinite;
}

.shape-2 {
  width: 400px;
  height: 400px;
  bottom: -100px;
  left: -100px;
  animation: float 6s ease-in-out infinite reverse;
}

.shape-3 {
  width: 200px;
  height: 200px;
  top: 40%;
  right: 20%;
  opacity: 0.05;
  animation: float 10s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-20px); }
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
  padding: 120px 24px 80px;
  animation: fadeInUp 0.8s ease both;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-eyebrow {
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: rgba(255,255,255,0.8);
  margin-bottom: 24px;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(32px, 6vw, 58px);
  font-weight: 600;
  color: #fff;
  line-height: 1.3;
  margin-bottom: 28px;
}

.hero-title .highlight {
  color: var(--color-accent-light);
  position: relative;
}

.hero-description {
  font-size: clamp(15px, 2vw, 17px);
  color: rgba(255,255,255,0.85);
  margin-bottom: 48px;
  line-height: 1.9;
}

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

/* スクロールインジケーター */
.hero-scroll-indicator {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,0.6);
  font-size: 11px;
  letter-spacing: 0.15em;
  font-weight: 500;
  animation: fadeInUp 1s ease 0.5s both;
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, rgba(255,255,255,0.6), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 1; transform: scaleY(1); }
  50% { opacity: 0.4; transform: scaleY(0.6); }
}

/* =============================================
   TOPへ戻るセクション
   ============================================= */
.top-nav-section {
  background: var(--color-primary);
  padding: 12px 0;
}

.top-nav-bar {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.top-scroll-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: rgba(255,255,255,0.15);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.4);
  border-radius: 50px;
  font-size: 14px;
  font-weight: 500;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: all var(--transition);
}

.top-scroll-btn:hover {
  background: rgba(255,255,255,0.25);
}

.top-nav-note {
  font-size: 12px;
  color: rgba(255,255,255,0.7);
}

/* =============================================
   実績・数字セクション
   ============================================= */
.stats-section {
  background: var(--color-primary-dark);
  padding: 60px 0;
}

.stats-list {
  display: flex;
  justify-content: center;
  gap: 0;
  flex-wrap: wrap;
}

.stat-item {
  flex: 1;
  min-width: 180px;
  text-align: center;
  padding: 24px 20px;
  border-right: 1px solid rgba(255,255,255,0.1);
  animation: fadeInUp 0.6s ease both;
}

.stat-item:last-child {
  border-right: none;
}

.stat-number {
  font-family: var(--font-serif);
  font-size: 52px;
  font-weight: 600;
  color: #fff;
  line-height: 1;
}

.stat-unit {
  font-size: 16px;
  color: var(--color-accent-light);
  font-weight: 600;
  margin-left: 2px;
}

.stat-label {
  font-size: 13px;
  color: rgba(255,255,255,0.7);
  margin-top: 8px;
}

/* =============================================
   会社についてセクション
   ============================================= */
.about-section {
  padding: 100px 0;
  background: var(--color-bg-white);
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about-text p {
  color: var(--color-text-light);
  line-height: 1.9;
  margin-bottom: 20px;
  font-size: 15px;
}

.about-features {
  margin-top: 32px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.feature-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
}

.feature-item i {
  color: var(--color-primary);
  font-size: 18px;
  flex-shrink: 0;
}

.about-card-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.about-card {
  background: var(--color-bg-section);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  text-align: center;
  transition: all var(--transition);
  border: 1px solid var(--color-border);
}

.about-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary-light);
}

.about-card i {
  font-size: 36px;
  color: var(--color-primary);
  margin-bottom: 14px;
}

.about-card h3 {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 8px;
}

.about-card p {
  font-size: 13px;
  color: var(--color-text-light);
  line-height: 1.6;
}

/* =============================================
   サービスセクション
   ============================================= */
.services-section {
  padding: 100px 0;
  background: var(--color-bg-section);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

/* サービスカードが奇数枚の場合、最後のカードを中央寄せで強調 */
.services-grid .service-card:last-child:nth-child(odd) {
  grid-column: 1 / -1;
  max-width: 640px;
  margin: 0 auto;
  width: 100%;
}

.service-card {
  background: var(--color-bg-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  outline: none;
}

.service-card:hover,
.service-card:focus {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary-light);
}

.service-icon {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  padding: 28px 36px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.service-icon i {
  font-size: 44px;
  color: #fff;
}

.service-body {
  padding: 36px;
  flex: 1;
}

.service-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 16px;
  line-height: 1.4;
}

.service-desc {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.9;
  margin-bottom: 24px;
}

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

.service-list li {
  font-size: 14px;
  color: var(--color-text);
  padding-left: 20px;
  position: relative;
}

.service-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
}

/* =============================================
   製品セクション
   ============================================= */
.products-section {
  padding: 100px 0;
  background: var(--color-bg-white);
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.product-card {
  background: var(--color-bg-white);
  border-radius: var(--radius-md);
  padding: 36px 32px;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.product-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transform: scaleX(0);
  transition: transform var(--transition);
  transform-origin: left;
}

.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

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

.product-badge {
  display: inline-block;
  padding: 4px 14px;
  background: var(--color-primary);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  border-radius: 50px;
  margin-bottom: 20px;
  letter-spacing: 0.05em;
}

.product-icon {
  margin-bottom: 16px;
}

.product-icon i {
  font-size: 40px;
  color: var(--color-primary);
}

.product-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 14px;
  line-height: 1.4;
}

.product-desc {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 20px;
}

.product-info {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  background: var(--color-bg-section);
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
}

.product-label {
  font-size: 12px;
  color: var(--color-text-muted);
  white-space: nowrap;
}

.product-value {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
}

.product-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.product-features li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--color-text);
}

.product-features li i {
  color: var(--color-primary);
  font-size: 12px;
}

/* =============================================
   お問い合わせセクション
   ============================================= */
.contact-section {
  padding: 100px 0;
  background: var(--color-bg-section);
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 48px;
  align-items: start;
}

.contact-info h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 28px;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 32px;
}

.contact-details li {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.contact-details li i {
  font-size: 18px;
  color: var(--color-primary);
  margin-top: 4px;
  flex-shrink: 0;
  width: 20px;
  text-align: center;
}

.contact-details li div {
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.8;
}

.contact-details li strong {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-primary-dark);
}

.contact-details li a {
  color: var(--color-primary);
  font-weight: 500;
}

.contact-details li a:hover {
  color: var(--color-accent);
  text-decoration: underline;
}

.contact-map-placeholder {
  background: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  height: 160px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  color: var(--color-text-muted);
}

.contact-map-placeholder i {
  font-size: 36px;
  color: var(--color-primary-light);
}

.contact-map-placeholder p {
  font-size: 14px;
  font-weight: 500;
}

/* フォーム */
.contact-form-wrapper {
  background: var(--color-bg-white);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
}

.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.required {
  color: var(--color-accent);
  margin-left: 4px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 13px 18px;
  font-size: 15px;
  font-family: var(--font-sans);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  color: var(--color-text);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
  appearance: none;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: #bbb;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--color-primary-light);
  box-shadow: 0 0 0 3px rgba(45, 107, 196, 0.1);
  background: #fff;
}

.form-group input.error,
.form-group textarea.error {
  border-color: #e53e3e;
  box-shadow: 0 0 0 3px rgba(229, 62, 62, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 130px;
}

.field-error {
  display: block;
  font-size: 12px;
  color: #e53e3e;
  margin-top: 6px;
  min-height: 16px;
}

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

.form-success {
  margin-top: 16px;
  padding: 16px 20px;
  background: #f0fff4;
  border: 1px solid #68d391;
  border-radius: var(--radius-sm);
  color: #276749;
  font-size: 14px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 10px;
}

.form-success i {
  font-size: 20px;
  color: #38a169;
}

/* =============================================
   フッター
   ============================================= */
.site-footer {
  background: var(--color-primary-dark);
  color: rgba(255,255,255,0.85);
}

.footer-inner {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

.footer-top {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 64px;
  padding: 64px 0 48px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-logo .logo-text-main {
  color: #fff;
}

.footer-logo .logo-text-sub {
  color: rgba(255,255,255,0.7);
}

.footer-tagline {
  font-size: 13px;
  color: rgba(255,255,255,0.6);
  margin-top: 12px;
  line-height: 1.7;
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.footer-nav-group h4 {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: rgba(255,255,255,0.5);
  text-transform: uppercase;
  margin-bottom: 16px;
}

.footer-nav-group ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-nav-group a {
  font-size: 14px;
  color: rgba(255,255,255,0.75);
  text-decoration: none;
  transition: color var(--transition);
}

.footer-nav-group a:hover {
  color: #fff;
}

.footer-bottom {
  padding: 24px 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-address {
  font-size: 13px;
  color: rgba(255,255,255,0.5);
}

.footer-copyright {
  font-size: 13px;
  color: rgba(255,255,255,0.4);
}

/* =============================================
   TOPへ戻るフローティングボタン
   ============================================= */
.fab-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  box-shadow: var(--shadow-md);
  transition: all var(--transition);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  z-index: 999;
}

.fab-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.fab-top:hover {
  background: var(--color-primary-light);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

/* =============================================
   スクロールアニメーション
   ============================================= */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* =============================================
   レスポンシブ
   ============================================= */
@media (max-width: 1024px) {
  .about-content {
    grid-template-columns: 1fr;
    gap: 48px;
  }

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

  .footer-nav {
    grid-template-columns: repeat(3, 1fr);
  }

  /* サービスカード：タブレット以下は1列 */
  .services-grid {
    grid-template-columns: 1fr;
  }

  .services-grid .service-card:last-child:nth-child(odd) {
    max-width: 100%;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 64px;
  }

  .hamburger-btn {
    display: flex;
  }

  .global-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--color-bg-white);
    padding: 80px 32px 32px;
    box-shadow: -4px 0 24px rgba(0,0,0,0.15);
    transition: right var(--transition);
    z-index: 1000;
    overflow-y: auto;
  }

  .global-nav.is-open {
    right: 0;
  }

  .global-nav ul {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }

  .nav-link {
    color: var(--color-text) !important;
    font-size: 16px;
    padding: 12px 16px;
    width: 100%;
  }

  .nav-link:hover,
  .nav-link.active {
    background: var(--color-bg-section) !important;
    color: var(--color-primary) !important;
  }

  .pc-only {
    display: none;
  }

  .hero-content {
    padding: 100px 24px 60px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .stats-list {
    gap: 0;
  }

  .stat-item {
    min-width: 50%;
    border-right: none;
    border-bottom: 1px solid rgba(255,255,255,0.1);
  }

  .stat-item:nth-child(odd) {
    border-right: 1px solid rgba(255,255,255,0.1);
  }

  .stat-item:last-child,
  .stat-item:nth-last-child(2):nth-child(odd) {
    border-bottom: none;
  }

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

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

  .service-icon {
    padding: 28px;
  }

  .service-icon i {
    font-size: 40px;
  }

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

  .contact-content {
    grid-template-columns: 1fr;
  }

  .contact-form-wrapper {
    padding: 32px 24px;
  }

  .footer-nav {
    grid-template-columns: 1fr 1fr;
  }

  .footer-bottom {
    text-align: center;
  }

  .fab-top {
    bottom: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
    font-size: 16px;
  }

  .top-nav-note {
    display: none;
  }
}

@media (max-width: 480px) {
  .stat-number {
    font-size: 40px;
  }

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

  .footer-nav {
    grid-template-columns: 1fr;
  }

  .hero-title {
    font-size: 28px;
  }

  .product-features {
    grid-template-columns: 1fr;
  }

  .section-title {
    font-size: 24px;
  }
}

/* =============================================
   モバイルオーバーレイ
   ============================================= */
.nav-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition);
}

.nav-overlay.is-open {
  opacity: 1;
  visibility: visible;
}

/* =============================================
   ドロップダウンナビゲーション
   ============================================= */
.nav-has-dropdown {
  position: relative;
}

.nav-arrow {
  font-size: 10px;
  margin-left: 2px;
  transition: transform var(--transition);
}

.nav-has-dropdown:hover .nav-arrow {
  transform: rotate(180deg);
}

.nav-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  min-width: 220px;
  background: #fff;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
  opacity: 0;
  visibility: hidden;
  transition: all 0.2s ease;
  z-index: 100;
  padding: 8px 0;
}

.nav-dropdown::before {
  content: '';
  position: absolute;
  top: -6px;
  left: 50%;
  transform: translateX(-50%);
  width: 12px;
  height: 12px;
  background: #fff;
  border-left: 1px solid var(--color-border);
  border-top: 1px solid var(--color-border);
  clip-path: polygon(0 0, 100% 0, 0 100%);
  transform: translateX(-50%) rotate(45deg);
}

.nav-has-dropdown:hover .nav-dropdown {
  opacity: 1;
  visibility: visible;
  top: calc(100% + 4px);
}

.nav-dropdown li a {
  display: block;
  padding: 10px 20px;
  font-size: 14px;
  color: var(--color-text);
  font-weight: 500;
  transition: all var(--transition);
  text-decoration: none;
}

.nav-dropdown li a:hover {
  background: var(--color-bg-section);
  color: var(--color-primary);
  padding-left: 26px;
}

/* モバイル時のドロップダウン */
@media (max-width: 768px) {
  .nav-dropdown {
    position: static;
    transform: none;
    box-shadow: none;
    border: none;
    border-left: 3px solid var(--color-primary-light);
    border-radius: 0;
    opacity: 1;
    visibility: visible;
    background: var(--color-bg-section);
    margin: 4px 0 4px 16px;
    padding: 4px 0;
  }

  .nav-dropdown::before {
    display: none;
  }

  .nav-dropdown li a {
    font-size: 14px;
    padding: 8px 16px;
    color: var(--color-text-light);
  }

  .nav-arrow {
    display: none;
  }
}

/* =============================================
   カードの詳細リンク・クリッカブルリンク
   ============================================= */
.card-detail-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 20px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: all var(--transition);
}

.card-detail-link:hover {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
  gap: 12px;
}

.product-card {
  position: relative;
}

.product-card-link {
  position: absolute;
  inset: 0;
  z-index: 1;
  border-radius: var(--radius-md);
}

/* =============================================
   詳細ページ共通スタイル
   ============================================= */

/* パンくずリスト */
.breadcrumb-section {
  background: var(--color-bg-section);
  padding: 14px 0;
  border-bottom: 1px solid var(--color-border);
  margin-top: var(--header-height);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.breadcrumb a {
  font-size: 13px;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition);
}

.breadcrumb a:hover {
  color: var(--color-primary);
}

.breadcrumb-sep {
  font-size: 11px;
  color: var(--color-text-muted);
}

.breadcrumb-current {
  font-size: 13px;
  color: var(--color-text);
  font-weight: 500;
}

/* ページヒーロー（詳細ページ用） */
.page-hero {
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 60%, #1e6fba 100%);
  padding: 72px 0 80px;
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.page-hero-inner {
  position: relative;
  z-index: 1;
  max-width: 1140px;
  margin: 0 auto;
  padding: 40px 24px 0 24px;
}

.page-hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 50px;
  padding: 6px 18px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: rgba(255,255,255,0.9);
  margin-bottom: 20px;
}

.page-hero-title {
  font-family: var(--font-serif);
  font-size: clamp(28px, 5vw, 46px);
  font-weight: 600;
  color: #fff;
  line-height: 1.35;
  margin-bottom: 20px;
}

.page-hero-desc {
  font-size: 16px;
  color: rgba(255,255,255,0.82);
  max-width: 640px;
  line-height: 1.9;
}

/* 詳細ページ本文セクション */
.detail-section {
  padding: 88px 0;
}

.detail-section:nth-child(even) {
  background: var(--color-bg-section);
}

.detail-section:nth-child(odd) {
  background: var(--color-bg-white);
}

/* 特徴カード（詳細ページ用） */
.feature-cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: var(--color-bg-white);
  border-radius: var(--radius-md);
  padding: 36px 28px;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  text-align: center;
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary-light);
}

.feature-card-icon {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}

.feature-card-icon i {
  font-size: 30px;
  color: #fff;
}

.feature-card h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 12px;
  line-height: 1.4;
}

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

/* プロセスステップ */
.process-steps {
  display: flex;
  flex-direction: column;
  gap: 0;
  counter-reset: step;
}

.process-step {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 28px;
  align-items: start;
  padding: 32px 0;
  border-bottom: 1px solid var(--color-border);
}

.process-step:last-child {
  border-bottom: none;
}

.step-number {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 600;
  flex-shrink: 0;
  box-shadow: 0 4px 16px rgba(26, 75, 140, 0.3);
}

.step-content h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 10px;
  line-height: 1.4;
  padding-top: 12px;
}

.step-content p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.9;
}

/* 機能一覧テーブル */
.spec-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  box-shadow: var(--shadow-sm);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.spec-table th,
.spec-table td {
  padding: 16px 24px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.spec-table thead th {
  background: var(--color-primary-dark);
  color: #fff;
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.05em;
}

.spec-table tbody tr:nth-child(even) {
  background: var(--color-bg-section);
}

.spec-table tbody tr:hover {
  background: #e8f0fb;
}

.spec-table td:first-child {
  font-weight: 600;
  color: var(--color-primary-dark);
  width: 35%;
}

.spec-check {
  color: var(--color-primary);
  font-size: 16px;
}

/* CTA バナー */
.cta-banner {
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
  padding: 72px 0;
  text-align: center;
}

.cta-banner h2 {
  font-family: var(--font-serif);
  font-size: clamp(22px, 4vw, 34px);
  color: #fff;
  margin-bottom: 16px;
  line-height: 1.4;
}

.cta-banner p {
  font-size: 15px;
  color: rgba(255,255,255,0.8);
  margin-bottom: 36px;
  line-height: 1.8;
}

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

/* 関連ページリンク */
.related-pages {
  padding: 72px 0;
  background: var(--color-bg-section);
}

.related-pages .section-header {
  margin-bottom: 40px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.related-card {
  background: var(--color-bg-white);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  border: 1px solid var(--color-border);
  transition: all var(--transition);
  text-decoration: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.related-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary-light);
}

.related-card-badge {
  display: inline-block;
  padding: 3px 12px;
  background: var(--color-primary);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  border-radius: 50px;
  align-self: flex-start;
}

.related-card h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-primary-dark);
  line-height: 1.4;
}

.related-card p {
  font-size: 13px;
  color: var(--color-text-light);
  line-height: 1.7;
  flex: 1;
}

.related-card-arrow {
  font-size: 13px;
  color: var(--color-primary);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 4px;
}

/* 詳細ページレスポンシブ */
@media (max-width: 768px) {
  .feature-cards-grid {
    grid-template-columns: 1fr;
  }

  .process-step {
    grid-template-columns: 56px 1fr;
    gap: 20px;
  }

  .step-number {
    width: 52px;
    height: 52px;
    font-size: 18px;
  }

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

  .page-hero {
    padding: 52px 0 60px;
  }

  .cta-banner-actions {
    flex-direction: column;
    align-items: center;
  }
}

@media (max-width: 1024px) {
  .feature-cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 480px) {
  .feature-cards-grid {
    grid-template-columns: 1fr;
  }
}