/* ============================================
   Smart Profit Homepage - Design System
   inouekabu.com テイスト: 白ベース + ブルーティールグラデーション
   大きな丸み、ソフトシャドウ、モダン
   ============================================ */

:root {
  /* メインカラー（ブルー → ティールグラデーション） */
  --color-primary: #2468f9;
  --color-primary-dark: #1a5ae0;
  --color-secondary: #3dccad;
  --gradient-primary: linear-gradient(135deg, #1978ff 0%, #3dccad 100%);
  --gradient-primary-hover: linear-gradient(135deg, #1565e0 0%, #2fb89a 100%);

  /* ダーク（見出し・フッター） */
  --color-dark: #1e293b;
  --color-dark-light: #334155;

  /* 背景系（とても柔らかい） */
  --color-white: #ffffff;
  --color-bg-soft: #f8fafc;
  --color-bg-section: #f1f5f9;

  /* グラデーション背景 */
  --gradient-body: linear-gradient(180deg, #eef5ff 0%, #f5fbf9 30%, #ffffff 100%);
  --gradient-hero: linear-gradient(170deg, #eef5ff 0%, #e8f4f1 40%, #f3f8ff 100%);
  --gradient-section: linear-gradient(180deg, #f0f6f9 0%, #e8f0f5 100%);
  --gradient-soft: linear-gradient(180deg, #f8fcff 0%, #eef5ff 100%);
  --gradient-trust: linear-gradient(180deg, #edf4ff 0%, #e4f3ee 50%, #edf4ff 100%);

  /* テキスト */
  --color-text: #475569;
  --color-text-dark: #1e293b;
  --color-text-light: #94a3b8;
  --color-text-on-dark: #ffffff;

  /* アクセント */
  --color-accent: #2468f9;
  --color-success: #22c55e;
  --color-error: #ef4444;
  --color-gold: #c4a55a;

  /* ボーダー */
  --color-border: #e2e8f0;
  --color-border-light: #f1f5f9;

  /* フォント */
  --font-family: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Helvetica Neue", Arial, sans-serif;
  --container-max: 1100px;
  --header-height: 72px;

  /* 丸み（大きめ） */
  --radius: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-pill: 50px;

  /* シャドウ（柔らかい） */
  --shadow-xs: 0 1px 3px rgba(0, 0, 0, 0.04);
  --shadow: 0 4px 16px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.08);
  --shadow-primary: 0 8px 32px rgba(25, 120, 255, 0.2);

  --transition: 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}

/* --- Reset & Base --- */
*, *::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-family);
  font-size: 16px;
  line-height: 1.9;
  color: var(--color-text);
  background: var(--gradient-body);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-primary-dark); }
ul, ol { list-style: none; }

/* --- Layout --- */
.container { max-width: var(--container-max); margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0; }
.section--gray { background: var(--gradient-section); }
.section--navy { background: var(--gradient-primary); color: var(--color-text-on-dark); }
.text-center { text-align: center; }
.sp-only { display: none; }

/* --- Typography --- */
h1, h2, h3, h4 { font-weight: 700; line-height: 1.4; color: var(--color-text-dark); }
h1 { font-size: 2.5rem; letter-spacing: -0.02em; }
h2 { font-size: 1.9rem; margin-bottom: 16px; letter-spacing: -0.01em; }
h3 { font-size: 1.25rem; margin-bottom: 12px; }
p { margin-bottom: 16px; }
.subtitle { font-size: 1.05rem; color: var(--color-text-light); margin-bottom: 24px; font-weight: 400; }
.section--navy .subtitle { color: rgba(255, 255, 255, 0.8); }

/* --- Buttons (pill型: 大きな丸み) --- */
.btn {
  display: inline-block;
  padding: 14px 36px;
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-pill);
  cursor: pointer;
  text-align: center;
  transition: all var(--transition);
  text-decoration: none;
  line-height: 1.5;
  letter-spacing: 0.02em;
}
.btn--cta {
  background: var(--gradient-primary);
  color: #ffffff !important;
  box-shadow: var(--shadow-primary);
}
.btn--cta:hover {
  background: var(--gradient-primary-hover);
  color: var(--color-white);
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(25, 120, 255, 0.3);
}
.btn--outline {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}
.btn--outline:hover {
  background: var(--gradient-primary);
  color: var(--color-white);
  border-color: transparent;
  transform: translateY(-2px);
}
.btn--white {
  background: var(--color-white);
  color: var(--color-primary);
  box-shadow: var(--shadow);
}
.btn--white:hover {
  background: var(--color-bg-soft);
  color: var(--color-primary-dark);
  transform: translateY(-2px);
}
.btn--lg { padding: 18px 48px; font-size: 1.05rem; }
.btn-group { display: flex; gap: 16px; flex-wrap: wrap; }

/* --- Header --- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  height: var(--header-height);
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}
.header .container { display: flex; align-items: center; justify-content: space-between; height: 100%; }
.header__logo { font-size: 1.3rem; font-weight: 700; color: var(--color-text-dark); text-decoration: none; }
.header__logo:hover { color: var(--color-text-dark); }
.header__nav { display: flex; align-items: center; gap: 32px; }
.header__nav a { color: var(--color-text); font-size: 0.9rem; font-weight: 500; text-decoration: none; transition: color var(--transition); }
.header__nav a:hover { color: var(--color-primary); }
.header__nav .btn--cta { padding: 10px 28px; font-size: 0.85rem; }
.dropdown { position: relative; }
.dropdown__menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  min-width: 180px;
  padding: 12px 0 8px;
  z-index: 200;
  border: 1px solid var(--color-border-light);
}
.dropdown:hover .dropdown__menu { display: block; }
.dropdown__menu a { display: block; padding: 10px 20px; color: var(--color-text); font-size: 0.9rem; border-radius: 8px; margin: 0 4px; }
.dropdown__menu a:hover { background: var(--color-bg-soft); color: var(--color-primary); }
.header__toggle { display: none; background: none; border: none; color: var(--color-text-dark); font-size: 1.5rem; cursor: pointer; padding: 4px; }

/* --- Hero --- */
.hero { padding: 96px 0 72px; background: var(--gradient-hero); }
.hero .container { display: flex; align-items: center; gap: 56px; }
.hero__content { flex: 1; }
.hero__title { font-size: 2.4rem; line-height: 1.3; color: var(--color-text-dark); margin-bottom: 20px; }
.hero__title span {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero__subtitle { font-size: 1.1rem; color: var(--color-text); margin-bottom: 36px; line-height: 1.9; }
.hero__image { flex: 1; max-width: 520px; }
.hero__image img { border-radius: var(--radius-xl); box-shadow: var(--shadow-lg); }

/* Screenshot placeholder */
.screenshot-placeholder {
  background: linear-gradient(135deg, #eef5ff 0%, #e8f3f1 100%);
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-xl);
  padding: 72px 24px;
  text-align: center;
  color: var(--color-text-light);
  font-size: 0.9rem;
  transition: all var(--transition);
}
.screenshot-placeholder:hover {
  border-color: var(--color-primary);
  background: linear-gradient(135deg, #f3f8ff 0%, #edf6f3 100%);
}

/* --- Pain Points --- */
.pain-points { background: var(--gradient-section); padding: 80px 0; }
.pain-points h2 { text-align: center; margin-bottom: 48px; }
.pain-list { max-width: 700px; margin: 0 auto; display: flex; flex-direction: column; gap: 16px; }
.pain-item {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--color-white);
  padding: 18px 28px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  font-size: 1rem;
  transition: all var(--transition);
}
.pain-item::before { content: "\2717"; color: var(--color-error); font-weight: 700; font-size: 1.1rem; flex-shrink: 0; }
.pain-item:hover { transform: translateX(8px); box-shadow: var(--shadow-md); }

/* --- Solution Intro --- */
.solution-intro { padding: 96px 0; text-align: center; background: var(--gradient-soft); }
.solution-intro h2 { margin-bottom: 48px; }
.solution-intro__image { max-width: 800px; margin: 0 auto 48px; }
.solution-img { width: 100%; border-radius: var(--radius-xl); box-shadow: var(--shadow-lg); }
.feature-count {
  display: inline-block;
  background: var(--gradient-primary);
  color: var(--color-white);
  font-size: 2.2rem;
  font-weight: 700;
  padding: 20px 48px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-primary);
}
.feature-count__label { display: block; font-size: 0.85rem; color: rgba(255, 255, 255, 0.85); font-weight: 400; margin-top: 4px; }

/* --- Features Grid --- */
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 56px; }
.feature-card {
  background: var(--color-white);
  padding: 36px 28px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  text-align: center;
  transition: all var(--transition);
  border: 1px solid var(--color-border-light);
}
.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.feature-card__number {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-white);
  background: var(--gradient-primary);
  width: 40px;
  height: 40px;
  line-height: 40px;
  border-radius: 50%;
  margin-bottom: 16px;
}
.feature-card__img { margin: -36px -28px 20px; overflow: hidden; border-radius: var(--radius-lg) var(--radius-lg) 0 0; min-height: 0; }
.feature-card__img:empty { display: none; }
.feature-card__image { width: 100%; height: 160px; object-fit: cover; }
.feature-card h3 { font-size: 1.1rem; margin-bottom: 8px; }
.feature-card p { font-size: 0.9rem; color: var(--color-text-light); margin-bottom: 0; line-height: 1.7; }
.feature-card:hover .feature-card__number {
  transform: scale(1.1);
  transition: transform 0.3s ease;
}

/* --- Feature Detail (features page) --- */
.feature-detail { display: flex; align-items: center; gap: 56px; padding: 56px 0; }
.feature-detail:nth-child(even) { flex-direction: row-reverse; }
.feature-detail__content { flex: 1; }
.feature-detail__image { flex: 1; max-width: 480px; }
.feature-detail__number {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-primary);
  background: rgba(36, 104, 249, 0.08);
  padding: 4px 16px;
  border-radius: var(--radius-pill);
  margin-bottom: 12px;
  letter-spacing: 0.06em;
}
.feature-detail__content ul { margin-top: 16px; }
.feature-detail__content li { padding: 6px 0; padding-left: 24px; position: relative; color: var(--color-text); }
.feature-detail__content li::before { content: "\2713"; color: var(--color-success); font-weight: 700; position: absolute; left: 0; }

/* --- How It Works --- */
.how-it-works { padding: 96px 0; text-align: center; background: var(--gradient-trust); }
.how-it-works h2 { margin-bottom: 56px; }
.steps { display: flex; justify-content: center; gap: 24px; margin-bottom: 36px; }
.step { flex: 1; max-width: 260px; text-align: center; }
.step__number {
  width: 60px;
  height: 60px;
  background: var(--gradient-primary);
  color: var(--color-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  font-weight: 700;
  margin: 0 auto 20px;
  box-shadow: var(--shadow-primary);
  transition: all var(--transition);
}
.step:hover .step__number { transform: scale(1.1); }
.step h3 { font-size: 1.1rem; margin-bottom: 8px; }
.step p { font-size: 0.9rem; color: var(--color-text-light); }
.step__arrow { display: flex; align-items: center; color: var(--color-border); font-size: 1.5rem; padding-top: 20px; }
.steps-link { margin-top: 8px; }
.steps-link a { color: var(--color-primary); font-weight: 500; }

/* --- Trust Section --- */
.trust-section {
  background: var(--gradient-trust);
  color: var(--color-text-dark);
  padding: 96px 0;
  text-align: center;
}
.trust-section h2 { font-size: 2rem; margin-bottom: 20px; color: var(--color-text-dark); }
.trust-section .subtitle { max-width: 720px; margin: 0 auto; color: var(--color-text); }
.trust-section__award { margin-bottom: 32px; }
.trust-award-img { max-width: 400px; margin: 0 auto; border-radius: var(--radius-lg); }

/* --- CTA Banner --- */
.cta-banner {
  background: var(--gradient-primary);
  color: var(--color-text-on-dark);
  padding: 80px 0;
  text-align: center;
}
.cta-banner h2 { font-size: 1.7rem; margin-bottom: 8px; color: var(--color-white); }
.cta-banner .subtitle { margin-bottom: 28px; color: rgba(255, 255, 255, 0.85); }
.cta-banner .btn--cta {
  background: var(--color-white);
  color: var(--color-primary) !important;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}
.cta-banner .btn--cta:hover {
  background: var(--color-bg-soft);
  transform: translateY(-3px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

/* --- Pricing --- */
.pricing-cards { display: flex; gap: 28px; justify-content: center; flex-wrap: wrap; }
.pricing-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 44px 36px;
  width: 340px;
  text-align: center;
  transition: all var(--transition);
}
.pricing-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.pricing-card--recommended { border: 2px solid var(--color-primary); position: relative; }
.pricing-card__badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-primary);
  color: var(--color-white);
  font-size: 0.8rem;
  font-weight: 700;
  padding: 6px 24px;
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-primary);
}
.pricing-card h3 { font-size: 1.3rem; margin-bottom: 8px; }
.pricing-card__price { font-size: 2.4rem; font-weight: 700; color: var(--color-text-dark); margin-bottom: 4px; }
.pricing-card__period { font-size: 0.85rem; color: var(--color-text-light); margin-bottom: 28px; }
.pricing-card__features { text-align: left; margin-bottom: 36px; }
.pricing-card__features li { padding: 8px 0; padding-left: 28px; position: relative; font-size: 0.95rem; }
.pricing-card__features li::before { content: "\2713"; color: var(--color-success); font-weight: 700; position: absolute; left: 0; }

/* --- FAQ --- */
.faq-list { max-width: 700px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid var(--color-border); }
.faq-item__question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 22px 0;
  cursor: pointer;
  font-weight: 600;
  font-size: 1rem;
  color: var(--color-text-dark);
  transition: color var(--transition);
}
.faq-item__question::after { content: "+"; font-size: 1.3rem; color: var(--color-text-light); transition: transform var(--transition); }
.faq-item__question:hover { color: var(--color-primary); }
.faq-item__answer { padding: 0 0 22px; color: var(--color-text); font-size: 0.95rem; line-height: 1.9; }

/* --- Guide --- */
.guide-step { display: flex; gap: 36px; padding: 36px 0; border-bottom: 1px solid var(--color-border); }
.guide-step__image { flex: 0 0 400px; max-width: 400px; }
.guide-step__content { flex: 1; }
.guide-step__label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-primary);
  background: rgba(36, 104, 249, 0.08);
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  margin-bottom: 10px;
  letter-spacing: 0.04em;
}
.guide-toc {
  background: var(--color-white);
  padding: 28px 36px;
  border-radius: var(--radius-lg);
  margin-bottom: 48px;
  box-shadow: var(--shadow);
  border: 1px solid var(--color-border-light);
}
.guide-toc h3 { margin-bottom: 12px; }
.guide-toc ol { list-style: decimal; padding-left: 20px; }
.guide-toc li { padding: 6px 0; }
.guide-toc a { color: var(--color-text-dark); }
.guide-toc a:hover { color: var(--color-primary); }
.tip-box {
  background: rgba(36, 104, 249, 0.06);
  border-left: 4px solid var(--color-primary);
  padding: 18px 24px;
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 16px 0;
  font-size: 0.9rem;
  color: var(--color-text);
}
.next-steps {
  background: var(--color-white);
  padding: 36px;
  border-radius: var(--radius-lg);
  margin-top: 56px;
  box-shadow: var(--shadow);
  border: 1px solid var(--color-border-light);
}
.next-steps h3 { margin-bottom: 16px; }
.next-steps a { display: block; padding: 8px 0; color: var(--color-primary); font-weight: 500; }

/* --- Company --- */
.company-table { width: 100%; border-collapse: collapse; margin-top: 24px; border-radius: var(--radius); overflow: hidden; }
.company-table th, .company-table td { padding: 18px 24px; text-align: left; border-bottom: 1px solid var(--color-border); }
.company-table th { width: 30%; font-weight: 600; background: var(--color-bg-soft); color: var(--color-text-dark); }

/* --- Contact Form --- */
.contact-form { max-width: 640px; margin: 0 auto; }
.form-group { margin-bottom: 28px; }
.form-group label { display: block; font-weight: 600; margin-bottom: 8px; font-size: 0.95rem; color: var(--color-text-dark); }
.form-group label .required { color: var(--color-error); font-size: 0.8rem; margin-left: 4px; }
.form-group input, .form-group textarea, .form-group select {
  width: 100%;
  padding: 14px 20px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 1rem;
  font-family: var(--font-family);
  transition: all var(--transition);
  background: var(--color-white);
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(36, 104, 249, 0.1);
}
.form-group textarea { min-height: 160px; resize: vertical; }
.form-group .radio-group { display: flex; flex-direction: column; gap: 10px; margin-top: 4px; }
.form-group .radio-group label { font-weight: 400; display: flex; align-items: center; gap: 10px; cursor: pointer; }
.form-group .radio-group input[type="radio"] { width: auto; accent-color: var(--color-primary); }
.form-message { text-align: center; padding: 18px; border-radius: var(--radius); margin-bottom: 24px; }
.form-message--success { background: rgba(34, 197, 94, 0.08); color: var(--color-success); }
.form-message--error { background: rgba(239, 68, 68, 0.08); color: var(--color-error); }

/* --- Breadcrumb --- */
.breadcrumb { padding: 16px 0; font-size: 0.85rem; color: var(--color-text-light); }
.breadcrumb a { color: var(--color-text-light); }
.breadcrumb a:hover { color: var(--color-primary); }
.breadcrumb span { margin: 0 8px; }

/* --- Page Header --- */
.page-header {
  background: var(--gradient-hero);
  color: var(--color-text-dark);
  padding: 64px 0;
  text-align: center;
}
.page-header h1 { font-size: 2.1rem; margin-bottom: 8px; }
.page-header .subtitle { color: var(--color-text); margin-bottom: 0; }

/* --- Footer --- */
.footer { background: var(--color-dark); color: rgba(255, 255, 255, 0.65); padding: 64px 0 28px; }
.footer__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; margin-bottom: 44px; }
.footer__col h4 { color: var(--color-white); font-size: 0.9rem; margin-bottom: 18px; }
.footer__col a { display: block; color: rgba(255, 255, 255, 0.55); font-size: 0.85rem; padding: 5px 0; transition: color var(--transition); }
.footer__col a:hover { color: var(--color-white); }
.footer__bottom { border-top: 1px solid rgba(255, 255, 255, 0.08); padding-top: 28px; text-align: center; font-size: 0.8rem; }

/* ============================================
   LOADING OVERLAY
   ============================================ */
.loading-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.6s ease, visibility 0.6s ease;
}
.loading-overlay.is-hidden {
  opacity: 0;
  visibility: hidden;
}
.loading-overlay__inner {
  text-align: center;
}
.loading-logo {
  font-size: 1.8rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 24px;
  animation: loadingPulse 1.2s ease-in-out infinite;
}
.loading-bar {
  width: 160px;
  height: 3px;
  background: var(--color-border-light);
  border-radius: 4px;
  overflow: hidden;
  margin: 0 auto;
}
.loading-bar__fill {
  width: 100%;
  height: 100%;
  background: var(--gradient-primary);
  border-radius: 4px;
  animation: loadingSlide 1s ease-in-out infinite;
  transform-origin: left;
}
@keyframes loadingPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}
@keyframes loadingSlide {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(32px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.85); }
  to { opacity: 1; transform: scale(1); }
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(25, 120, 255, 0.35); }
  50% { box-shadow: 0 0 0 16px rgba(74, 108, 247, 0); }
}
@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* Intersection Observer */
.fade-in-up {
  opacity: 0; transform: translateY(32px);
  transition: opacity 0.8s cubic-bezier(0.22, 1, 0.36, 1), transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}
.fade-in-up.is-visible { opacity: 1; transform: translateY(0); }
.scale-in {
  opacity: 0; transform: scale(0.85);
  transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}
.scale-in.is-visible { opacity: 1; transform: scale(1); }
.stagger-in {
  opacity: 0; transform: translateY(24px);
  transition: opacity 0.6s cubic-bezier(0.22, 1, 0.36, 1), transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}
.stagger-in.is-visible { opacity: 1; transform: translateY(0); }
.stagger-in:nth-child(1) { transition-delay: 0s; }
.stagger-in:nth-child(2) { transition-delay: 0.1s; }
.stagger-in:nth-child(3) { transition-delay: 0.2s; }
.stagger-in:nth-child(4) { transition-delay: 0.3s; }
.stagger-in:nth-child(5) { transition-delay: 0.4s; }
.stagger-in:nth-child(6) { transition-delay: 0.5s; }

.btn--pulse { animation: pulse 2.5s infinite; }
.btn--pulse:hover { animation: none; }
.hero__image { animation: float 5s ease-in-out infinite; }

/* ヘッダーリンクホバー */
.header__nav a:not(.btn) { position: relative; }
.header__nav a:not(.btn)::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: all 0.3s ease;
  transform: translateX(-50%);
  border-radius: 2px;
}
.header__nav a:not(.btn):hover::after { width: 100%; }

/* prefers-reduced-motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  .fade-in-up, .stagger-in, .scale-in { opacity: 1; transform: none; }
  .hero__image { animation: none; }
  .btn--pulse { animation: none; }
}

/* --- Responsive --- */
@media (max-width: 768px) {
  :root { --header-height: 64px; }
  h1 { font-size: 1.9rem; } h2 { font-size: 1.5rem; }
  .header { background: rgba(255, 255, 255, 0.95); }
  .header__nav {
    display: none; position: absolute; top: var(--header-height); left: 0; right: 0;
    background: var(--color-white); flex-direction: column; padding: 20px 24px; gap: 14px;
    box-shadow: var(--shadow-lg); border-top: 1px solid var(--color-border-light);
  }
  .header__nav.is-open { display: flex; }
  .header__toggle { display: block; }
  .header__nav a { color: var(--color-text-dark); }
  .dropdown__menu { position: static; transform: none; box-shadow: none; border: none; padding: 0; margin-top: 0; }
  .dropdown__menu a { padding: 8px 16px; color: var(--color-text); }
  .sp-only { display: inline; }
  .hero .container { flex-direction: column; text-align: center; }
  .hero__title { font-size: 2.1rem; }
  .hero__image { max-width: 100%; }
  .btn-group { justify-content: center; }
  .features-grid { grid-template-columns: 1fr; gap: 16px; }
  .steps { flex-direction: column; align-items: center; }
  .step__arrow { display: none; }
  .pricing-cards { flex-direction: column; align-items: center; }
  .pricing-card { width: 100%; max-width: 400px; }
  .feature-detail, .feature-detail:nth-child(even) { flex-direction: column; }
  .feature-detail__image { max-width: 100%; }
  .guide-step { flex-direction: column; }
  .guide-step__image { flex: none; max-width: 100%; }
  .footer__grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .section { padding: 64px 0; }
}
@media (max-width: 480px) {
  .footer__grid { grid-template-columns: 1fr; }
}