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

:root {
  --primary: #1a56db;
  --primary-dark: #1042a8;
  --primary-light: #e8effc;
  --accent: #f59e0b;
  --text: #1f2937;
  --text-light: #6b7280;
  --bg: #ffffff;
  --bg-gray: #f9fafb;
  --bg-dark: #111827;
  --border: #e5e7eb;
  --radius: 8px;
  --radius-lg: 12px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
  --transition: 0.3s ease;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Noto Sans JP",
    "Yu Gothic", "Meiryo", sans-serif;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
  background: var(--bg);
}

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

ul {
  list-style: none;
}

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

/* ========================================
   共通コンポーネント
   ======================================== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 100px 0;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 12px;
  color: var(--text);
}

.section-subtitle {
  text-align: center;
  color: var(--text-light);
  font-size: 1.1rem;
  margin-bottom: 60px;
}

/* ボタン */
.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  border: 2px solid transparent;
  text-align: center;
}

.btn-sm {
  padding: 8px 20px;
  font-size: 0.9rem;
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.1rem;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-outline {
  background: transparent;
  color: #fff;
  border-color: #fff;
}

.btn-outline:hover {
  background: #fff;
  color: var(--primary);
}

.btn-full {
  width: 100%;
}

.required {
  color: #ef4444;
  font-size: 0.8rem;
  margin-left: 4px;
}

/* ========================================
   ヘッダー
   ======================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: transparent;
  transition: all var(--transition);
}

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

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

.header.scrolled .nav-list a {
  color: var(--text);
}

.header.scrolled .nav-list a:hover {
  color: var(--primary);
}

.header.scrolled .hamburger span {
  background: var(--text);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.logo {
  font-size: 1.6rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.5px;
}

.logo span {
  color: var(--accent);
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-list a {
  color: #fff;
  font-size: 0.95rem;
  font-weight: 500;
}

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

.nav-list .btn {
  color: #fff;
  border-color: #fff;
}

.nav-list .btn:hover {
  background: #fff;
  color: var(--primary);
}

.header.scrolled .nav-list .btn {
  color: #fff;
  background: var(--primary);
  border-color: var(--primary);
}

.header.scrolled .nav-list .btn:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
}

/* ハンバーガーメニュー */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: #fff;
  transition: all var(--transition);
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ========================================
   ヒーローセクション
   ======================================== */
.hero {
  background: linear-gradient(135deg, #1a237e 0%, #1a56db 50%, #0ea5e9 100%);
  padding: 160px 0 100px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 50%;
}

.hero::after {
  content: "";
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: 50%;
}

.hero-inner {
  position: relative;
  z-index: 1;
  text-align: center;
}

.hero-title {
  font-size: 3rem;
  font-weight: 800;
  color: #fff;
  line-height: 1.4;
  margin-bottom: 24px;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 40px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-bottom: 60px;
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 60px;
  flex-wrap: wrap;
}

.stat {
  text-align: center;
}

.stat-number {
  display: block;
  font-size: 2.5rem;
  font-weight: 800;
  color: #fff;
}

.stat-label {
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.7);
}

/* ========================================
   サービス
   ======================================== */
.services {
  background: var(--bg-gray);
}

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

.service-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  box-shadow: var(--shadow);
  transition: all var(--transition);
  border: 1px solid var(--border);
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.service-icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.service-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text);
}

.service-card > p {
  color: var(--text-light);
  font-size: 0.95rem;
  margin-bottom: 20px;
}

.service-features {
  border-top: 1px solid var(--border);
  padding-top: 16px;
}

.service-features li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 8px;
  font-size: 0.9rem;
  color: var(--text-light);
}

.service-features li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  background: var(--primary);
  border-radius: 50%;
}

/* ========================================
   選ばれる理由
   ======================================== */
.strengths-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px;
}

.strength-item {
  display: flex;
  flex-direction: column;
  padding: 32px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  transition: all var(--transition);
}

.strength-item:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-lg);
}

.strength-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--primary);
  opacity: 0.3;
  margin-bottom: 12px;
  line-height: 1;
}

.strength-item h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.strength-item p {
  color: var(--text-light);
  font-size: 0.95rem;
}

/* ========================================
   実績
   ======================================== */
.results {
  background: var(--bg-gray);
}

.results-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.result-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.result-industry {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 16px;
}

.result-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.result-metric {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  padding: 16px;
  background: var(--bg-gray);
  border-radius: var(--radius);
  flex-wrap: wrap;
}

.result-before {
  color: var(--text-light);
  font-size: 0.9rem;
}

.result-arrow {
  color: var(--primary);
  font-size: 1.2rem;
  font-weight: 700;
}

.result-after {
  color: var(--primary);
  font-weight: 700;
  font-size: 1rem;
}

.result-card > p {
  color: var(--text-light);
  font-size: 0.9rem;
}

/* ========================================
   ご利用の流れ
   ======================================== */
.flow-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
}

.flow-steps::before {
  content: "";
  position: absolute;
  top: 40px;
  left: 12.5%;
  right: 12.5%;
  height: 2px;
  background: var(--border);
  z-index: 0;
}

.flow-step {
  text-align: center;
  position: relative;
  z-index: 1;
}

.step-number {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-size: 1.5rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  box-shadow: 0 4px 12px rgba(26, 86, 219, 0.3);
}

.flow-step h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.flow-step p {
  color: var(--text-light);
  font-size: 0.9rem;
}

/* ========================================
   お問い合わせ
   ======================================== */
.contact {
  background: var(--bg-gray);
}

.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 48px;
  align-items: start;
}

.contact-form {
  background: #fff;
  padding: 40px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.form-group {
  margin-bottom: 20px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 1rem;
  font-family: inherit;
  transition: border-color var(--transition);
  background: #fff;
  color: var(--text);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.1);
}

.form-group textarea {
  resize: vertical;
}

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

.contact-info-item {
  background: #fff;
  padding: 28px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.contact-info-item h3 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text);
}

.contact-info-item p {
  color: var(--text-light);
  font-size: 0.9rem;
}

.contact-phone {
  font-size: 1.4rem !important;
  font-weight: 700;
  color: var(--primary) !important;
}

/* ========================================
   フッター
   ======================================== */
.footer {
  background: var(--bg-dark);
  color: rgba(255, 255, 255, 0.7);
  padding: 60px 0 0;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand .logo {
  display: inline-block;
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.8;
}

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

.footer-col h4 {
  color: #fff;
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul li a {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.6);
  transition: color var(--transition);
}

.footer-col ul li a:hover {
  color: #fff;
}

.footer-bottom {
  text-align: center;
  padding: 24px 0;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.4);
}

/* ========================================
   レスポンシブ
   ======================================== */
@media (max-width: 1024px) {
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .flow-steps::before {
    display: none;
  }

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

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

@media (max-width: 768px) {
  .section {
    padding: 70px 0;
  }

  .section-title {
    font-size: 1.6rem;
  }

  .section-subtitle {
    font-size: 1rem;
    margin-bottom: 40px;
  }

  /* ヘッダー */
  .hamburger {
    display: flex;
  }

  .nav-list {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: #fff;
    flex-direction: column;
    align-items: flex-start;
    padding: 100px 32px 32px;
    gap: 0;
    transition: right var(--transition);
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.1);
  }

  .nav-list.active {
    right: 0;
  }

  .nav-list a {
    color: var(--text) !important;
    padding: 12px 0;
    display: block;
    width: 100%;
    font-size: 1rem;
  }

  .nav-list .btn {
    margin-top: 16px;
    text-align: center;
    background: var(--primary);
    color: #fff !important;
    border-color: var(--primary);
  }

  /* ヒーロー */
  .hero {
    padding: 120px 0 70px;
  }

  .hero-title {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .hero-stats {
    gap: 32px;
  }

  .stat-number {
    font-size: 2rem;
  }

  /* サービス */
  .services-grid {
    grid-template-columns: 1fr;
  }

  /* 選ばれる理由 */
  .strengths-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  /* 実績 */
  .results-grid {
    grid-template-columns: 1fr;
  }

  /* ご利用の流れ */
  .flow-steps {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  /* お問い合わせ */
  .form-row {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .contact-form {
    padding: 28px;
  }

  /* フッター */
  .footer-links {
    grid-template-columns: 1fr;
    gap: 24px;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 1.6rem;
  }

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

  .hero-actions .btn {
    width: 100%;
    max-width: 300px;
  }
}