:root {
  --bg: #f7f9fc;
  --surface: #ffffff;
  --surface-alt: #eef4ff;
  --text: #1e293b;
  --muted: #5b6b82;
  --line: #d9e2ef;
  --primary: #1e40af;
  --primary-dark: #17358f;
  --secondary: #0f766e;
  --accent: #eff6ff;
  --shadow: 0 12px 32px rgba(15, 23, 42, 0.08);
  --radius: 20px;
  --radius-sm: 14px;
  --container: 1120px;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
}

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

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

a:hover {
  text-decoration: underline;
}

/* アクセシビリティ */
.skip-link {
  position: absolute;
  left: -9999px;
  top: auto;
}

.skip-link:focus {
  left: 16px;
  top: 16px;
  background: #fff;
  padding: 12px 16px;
  z-index: 9999;
  border-radius: 10px;
}

/* レイアウト共通 */
.container {
  width: min(calc(100% - 32px), var(--container));
  margin: 0 auto;
}

.narrow {
  width: min(calc(100% - 32px), 920px);
  margin: 0 auto;
}

.section {
  padding: 72px 0;
}

.section-light {
  background: #fff;
}

.section-accent {
  background: linear-gradient(180deg, #edf4ff 0%, #ffffff 100%);
}

.center {
  text-align: center;
}

/* ヘッダー */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(217, 226, 239, 0.8);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 20px;
}

.site-logo {
  font-weight: 900;
  font-size: 1.5rem;
  color: var(--text);
}

.header-nav {
  margin-left: auto;
}

.nav-links {
  display: flex;
  gap: 20px;
  align-items: center;
}

.nav-links a {
  color: var(--text);
  font-weight: 600;
  font-size: 0.9rem;
  white-space: nowrap;
}

.nav-links a:hover {
  color: var(--primary);
  text-decoration: none;
}

/* 見出し */
h1,
h2,
h3 {
  margin: 0;
  line-height: 1.3;
}

h1 {
  font-size: clamp(2rem, 4vw, 3.4rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
}

h3 {
  font-size: 1.2rem;
}

.section-heading {
  max-width: 820px;
  margin: 0 auto 32px;
  text-align: center;
}

.section-heading.left {
  margin: 0 0 24px;
  text-align: left;
}

.section-heading p {
  margin: 14px 0 0;
  color: var(--muted);
}

/* FV */
.fv {
  position: relative;
  padding-top: 56px;
  background:
    radial-gradient(circle at 78% 22%, rgba(30, 64, 175, 0.12), transparent 28%),
    radial-gradient(circle at 72% 58%, rgba(15, 118, 110, 0.10), transparent 24%),
    linear-gradient(180deg, #f7f9fc 0%, #eef4ff 100%);
}

.fv-grid,
.price-panel {
  display: grid;
  gap: 32px;
  align-items: center;
}

.fv-grid {
  position: relative;
  min-height: 560px;
}

.fv-copy {
  position: relative;
  z-index: 2;
  width: min(100%, 760px);
  min-width: 0;
}

.fv-copy-inner {
  position: relative;
  z-index: 2;
}

.fv-visual {
  position: absolute;
  top: 50%;
  right: 0;
  transform: translateY(-50%);
  width: min(46vw, 520px);
  z-index: 1;
  pointer-events: none;
}

.hero-image-wrap {
  margin: 0;
  padding: 16px;
  border-radius: 28px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.96) 0%, rgba(255, 255, 255, 0.88) 100%);
  box-shadow:
    0 24px 56px rgba(15, 23, 42, 0.14),
    0 8px 24px rgba(30, 64, 175, 0.12);
  overflow: hidden;
}

.hero-image-wrap img {
  width: 100%;
  border-radius: 18px;
}

.eyebrow {
  display: inline-block;
  margin: 0 0 16px;
  padding: 8px 14px;
  background: var(--surface-alt);
  color: var(--primary);
  font-size: 0.95rem;
  font-weight: 700;
  border-radius: 999px;
}

.lead {
  margin: 20px 0 0;
  font-size: 1.15rem;
  color: var(--muted);
}

.sub-note,
.button-note,
.consult-note,
.faq-note {
  color: var(--muted);
}

.sub-note {
  margin: 16px 0 0;
  font-weight: 600;
}

.fv-points {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: flex-start;
  margin-top: 50px;
}

.fv-point {
  display: inline-flex;
  align-items: center;
  min-height: 50px;
  padding: 0 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid rgba(217, 226, 239, 0.95);
  color: var(--text);
  font-weight: 700;
  font-size: 0.95rem;
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.08);
}

/* ストアボタン */
.store-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.store-badges {
  align-items: center;
}

.store-badge-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 0;
}

.store-badge-link:hover {
  text-decoration: none;
}

.store-badge-link img {
  height: 60px;
  width: auto;
  display: block;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.store-badge-link:hover img {
  transform: translateY(-2px);
  opacity: 0.92;
}

.center-buttons {
  justify-content: center;
}

.button-note {
  margin-top: 12px;
  font-size: 1rem;
  font-weight: 600;
}

/* 共通カード */
.feature-card,
.step-card,
.price-panel,
.concerns-card {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

/* STEP */
.steps {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  gap: 16px;
  align-items: stretch;
}

.step-card {
  padding: 20px;
  text-align: center;
}

.step-card figure {
  margin: 14px 0 16px;
}

.step-number {
  display: inline-flex;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--surface-alt);
  color: var(--primary);
  font-weight: 700;
  font-size: 0.9rem;
}

.step-arrow {
  display: flex;
  align-items: center;
  font-size: 1.8rem;
  color: var(--muted);
}

/* Concerns */
.concerns-card {
  padding: 32px;
}

.concerns-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: center;
  margin-top: 16px;
}

.check-list {
  margin: 12px 0 20px;
  padding-left: 1.2em;
}

.concerns-image figure {
  margin: 0;
}

.concerns-image img {
  border-radius: var(--radius-sm);
}

.concerns-card .point-tags {
  margin-top: 28px;
}

.point-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.point-tags span {
  display: inline-flex;
  padding: 10px 14px;
  background: var(--accent);
  border: 1px solid #cddcff;
  border-radius: 999px;
  font-weight: 700;
  color: var(--primary);
}

.emphasis-note,
.lead-message {
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.7;
  color: var(--primary);
  border-left: 4px solid var(--primary);
  padding-left: 12px;
}

.emphasis-note {
  margin-top: 40px;
}

.lead-message {
  margin-top: 20px;
}

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

.feature-card {
  padding: 20px;
}

.feature-image {
  margin: 0 0 18px;
  overflow: hidden;
  border-radius: var(--radius-sm);
  background: #f3f7fd;
}

.feature-card p,
.price-copy p,
.faq-answer p,
.faq-answer li {
  margin-top: 12px;
}

/* 無料セクション */
.price-panel {
  grid-template-columns: 1fr 240px;
  padding: 24px;
}

.price-badge {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 240px;
  border-radius: 50%;
  background: linear-gradient(135deg, #1e40af 0%, #0f766e 100%);
  color: #fff;
  text-align: center;
}

.badge-number {
  font-size: 4rem;
  font-weight: 800;
  line-height: 1;
}

.badge-text {
  margin-top: 8px;
  font-size: 1.2rem;
  font-weight: 700;
}

/* FAQ */
.faq-list {
  display: grid;
  gap: 14px;
}

.faq-item {
  background: var(--surface);
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  padding: 0 20px;
}

.faq-item summary {
  cursor: pointer;
  padding: 18px 0;
  font-weight: 700;
  list-style: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-answer {
  padding: 0 0 18px;
}

/* 最終CTA */
.final-cta {
  padding-bottom: 120px;
}

/* 先頭へ戻る */
#backToTop {
  position: fixed;
  right: 20px;
  bottom: 90px;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: none;
  background: var(--primary);
  color: #fff;
  font-size: 20px;
  font-weight: bold;
  box-shadow: var(--shadow);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, transform 0.2s ease;
  z-index: 150;
}

#backToTop.show {
  opacity: 1;
  visibility: visible;
}

#backToTop:hover {
  transform: translateY(-3px);
  background: var(--primary-dark);
}

/* フッター */
.site-footer {
  padding: 24px 0 40px;
  border-top: 1px solid var(--line);
  background: #fff;
}

.footer-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.footer-left,
.footer-center,
.footer-right {
  flex: 1;
}

.footer-left {
  text-align: left;
}

.footer-left p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.footer-center {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
}

.footer-center a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--surface-alt);
  color: var(--primary);
  font-size: 1.1rem;
  transition: background 0.2s ease, transform 0.2s ease;
}

.footer-center a:hover {
  background: #dbeafe;
  text-decoration: none;
  transform: translateY(-2px);
}

.footer-right {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
}

.footer-right img {
  width: 40px;
  height: auto;
}

.footer-right a {
  color: var(--muted);
  font-size: 0.95rem;
}

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

/* =========================
   Responsive optimize
========================= */

/* タップ時の表示安定 */
html, body {
  overflow-x: hidden;
}

body {
  -webkit-text-size-adjust: 100%;
}

/* 長い要素のはみ出し防止 */
.fv-copy,
.section-heading,
.step-card,
.feature-card,
.price-copy,
.concerns-text,
.faq-answer,
.footer-right,
.footer-left,
.footer-center {
  min-width: 0;
}

/* 画像をより安全に */
.hero-image-wrap img,
.feature-image img,
.concerns-image img,
.step-card img {
  width: 100%;
  height: auto;
}

/* ========== Tablet ========== */
@media (max-width: 1024px) {
  html {
    scroll-padding-top: 64px;
  }

  .section {
    padding: 64px 0;
  }

  .header-inner {
    min-height: 64px;
    gap: 16px;
  }

  .site-logo {
    font-size: 1.2rem;
  }

  .nav-links {
    gap: 14px;
    flex-wrap: wrap;
    justify-content: flex-end;
  }

  .nav-links a {
    font-size: 0.85rem;
  }

  /* FV */
  .fv {
    padding-top: 40px;
  }

  .fv-grid {
    min-height: auto;
    display: grid;
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .fv-copy {
    width: 100%;
  }

  .fv-visual {
    position: static;
    transform: none;
    width: min(100%, 520px);
    margin: 0 auto;
    pointer-events: auto;
  }

  .hero-image-wrap {
    padding: 14px;
    border-radius: 24px;
  }

  .lead {
    font-size: 1.05rem;
  }

  .fv-points {
    margin-top: 24px;
    gap: 10px;
  }

  /* STEP */
  .steps {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .step-arrow {
    justify-content: center;
    font-size: 1.5rem;
    transform: rotate(90deg);
    line-height: 1;
  }

  /* Concerns */
  .concerns-card {
    padding: 28px;
  }

  .concerns-inner {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .concerns-image {
    order: 2;
  }

  .concerns-text {
    order: 1;
  }

  /* Features */
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  /* Price */
  .price-panel {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 28px;
  }

  .price-badge {
    min-height: 220px;
    width: min(100%, 220px);
    margin: 0 auto;
  }

  .badge-number {
    font-size: 3.4rem;
  }

  /* Footer */
  .footer-container {
    flex-wrap: wrap;
    row-gap: 16px;
  }

  .footer-left,
  .footer-center,
  .footer-right {
    flex: unset;
    width: 100%;
  }

  .footer-left,
  .footer-center,
  .footer-right {
    text-align: center;
    justify-content: center;
  }
}

/* ========== Mobile ========== */
@media (max-width: 767px) {
  :root {
    --radius: 16px;
    --radius-sm: 12px;
  }

  html {
    scroll-padding-top: 60px;
  }

  body {
    line-height: 1.65;
  }

  .container,
  .narrow {
    width: min(calc(100% - 24px), var(--container));
  }

  .section {
    padding: 48px 0;
  }

  h1 {
    font-size: clamp(1.9rem, 8vw, 2.5rem);
    line-height: 1.25;
  }

  h2 {
    font-size: clamp(1.45rem, 6vw, 2rem);
    line-height: 1.35;
  }

  h3 {
    font-size: 1.08rem;
    line-height: 1.45;
  }

  .section-heading {
    margin-bottom: 24px;
  }

  .section-heading.left {
    margin-bottom: 18px;
  }

  .section-heading p {
    margin-top: 10px;
    font-size: 0.97rem;
  }

  /* Header */
  .site-header {
    backdrop-filter: blur(6px);
  }

  .header-inner {
    min-height: 60px;
    padding: 10px 0;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
  }

  .site-logo {
    font-size: 1.05rem;
    line-height: 1.3;
  }

  .header-nav {
    width: 100%;
    margin-left: 0;
  }

  .nav-links {
    width: 100%;
    gap: 10px 14px;
    justify-content: flex-start;
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: 2px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  .nav-links::-webkit-scrollbar {
    display: none;
  }

  .nav-links a {
    flex: 0 0 auto;
    font-size: 0.83rem;
    padding: 4px 0;
  }

  /* FV */
  .fv {
    padding-top: 28px;
    background:
      radial-gradient(circle at 80% 10%, rgba(30, 64, 175, 0.10), transparent 26%),
      radial-gradient(circle at 20% 90%, rgba(15, 118, 110, 0.08), transparent 24%),
      linear-gradient(180deg, #f7f9fc 0%, #eef4ff 100%);
  }

  .fv-grid {
    gap: 20px;
  }

  .eyebrow {
    font-size: 0.82rem;
    padding: 7px 12px;
    margin-bottom: 14px;
  }

  .lead {
    margin-top: 16px;
    font-size: 1rem;
  }

  .sub-note {
    margin-top: 12px;
    font-size: 0.95rem;
  }

  .fv-points {
    margin-top: 18px;
    gap: 8px;
  }

  .fv-point {
    min-height: 40px;
    padding: 0 12px;
    font-size: 0.83rem;
  }

  .hero-image-wrap {
    padding: 10px;
    border-radius: 18px;
  }

  /* Store buttons */
  .store-buttons {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
    margin-top: 22px;
  }

  .store-badges {
    align-items: stretch;
  }

  .store-badge-link {
    width: 100%;
    justify-content: flex-start;
  }

  .store-badge-link img {
    height: 54px;
    max-width: 100%;
  }

  .center-buttons .store-badge-link {
    justify-content: center;
  }

  .button-note {
    margin-top: 10px;
    font-size: 0.95rem;
  }

  /* Cards */
  .step-card,
  .feature-card,
  .concerns-card,
  .price-panel {
    border-radius: var(--radius);
  }

  /* Steps */
  .step-card {
    padding: 18px 16px;
  }

  .step-card figure {
    margin: 12px 0 14px;
  }

  .step-number {
    font-size: 0.82rem;
    padding: 6px 10px;
  }

  .step-arrow {
    font-size: 1.25rem;
  }

  .emphasis-note,
  .lead-message {
    margin-top: 18px;
    font-size: 0.98rem;
    padding-left: 10px;
  }

  /* Concerns */
  .concerns-card {
    padding: 20px 16px;
  }

  .concerns-inner {
    gap: 18px;
    margin-top: 10px;
  }

  .check-list {
    margin: 10px 0 16px;
    padding-left: 1.1em;
  }

  .point-tags {
    gap: 10px;
    margin-top: 18px;
  }

  .point-tags span {
    font-size: 0.88rem;
    padding: 9px 12px;
  }

  /* Features */
  .feature-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .feature-card {
    padding: 16px;
  }

  .feature-image {
    margin-bottom: 14px;
  }

  /* Price */
  .price-panel {
    padding: 20px 16px;
    gap: 18px;
  }

  .price-copy p {
    margin-top: 10px;
  }

  .price-badge {
    min-height: 180px;
    width: min(100%, 180px);
  }

  .badge-number {
    font-size: 3rem;
  }

  .badge-text {
    font-size: 1rem;
  }

  .consult-note {
    font-size: 0.93rem;
  }

  /* FAQ */
  .faq-list {
    gap: 12px;
  }

  .faq-item {
    padding: 0 16px;
  }

  .faq-item summary {
    padding: 16px 0;
    font-size: 0.98rem;
    line-height: 1.5;
  }

  .faq-answer {
    padding: 0 0 16px;
  }

  .faq-answer ul {
    padding-left: 1.2em;
    margin: 0;
  }

  .faq-answer li {
    margin-top: 8px;
  }

  /* CTA */
  .final-cta {
    padding-bottom: 96px;
  }

  /* Back to top */
  #backToTop {
    right: 14px;
    bottom: 76px;
    width: 46px;
    height: 46px;
    font-size: 18px;
  }

  /* Footer */
  .site-footer {
    padding: 20px 0 28px;
  }

  .footer-container {
    gap: 14px;
  }

  .footer-left p,
  .footer-right a {
    font-size: 0.88rem;
  }

  .footer-center {
    gap: 12px;
  }

  .footer-center a {
    width: 38px;
    height: 38px;
    font-size: 1rem;
  }

  .footer-right {
    flex-direction: column;
    gap: 8px;
  }

  .footer-right img {
    width: 36px;
  }
}

/* ========== Small mobile ========== */
@media (max-width: 480px) {
  .container,
  .narrow {
    width: min(calc(100% - 20px), var(--container));
  }

  .section {
    padding: 42px 0;
  }

  .eyebrow {
    font-size: 0.78rem;
  }

  .lead {
    font-size: 0.96rem;
  }

  .store-badge-link img {
    height: 50px;
  }

  .fv-point {
    font-size: 0.8rem;
  }

  .price-badge {
    width: 160px;
    min-height: 160px;
  }

  .badge-number {
    font-size: 2.6rem;
  }

  .badge-text {
    font-size: 0.92rem;
  }

  .point-tags span {
    width: 100%;
    justify-content: center;
    text-align: center;
  }
}