/* =========================================================
   余白とAI — 法人ページ
   Anthropic / Apple 風 · Warm Minimalism
   ========================================================= */

:root {
  /* === 背景 === */
  --color-bg:           #FAFAF7;
  --color-bg-alt:       #F2EFE9;
  --color-surface:      #FFFFFF;
  --color-bg-dark:      #1A1A1A;

  /* === テキスト === */
  --color-text:         #1A1A1A;
  --color-text-sub:     #6B6B66;
  --color-text-mute:    #A5A39C;
  --color-text-on-dark: #FAFAF7;

  /* === アクセント === */
  --color-accent:       #C77A52;
  --color-accent-dark:  #9E5F3C;

  /* === 境界線 === */
  --color-border:          rgba(26, 26, 26, 0.08);
  --color-border-strong:   rgba(26, 26, 26, 0.15);
  --color-border-on-dark:  rgba(250, 250, 247, 0.12);

  /* === フォント === */
  --font-serif: 'Noto Serif JP', 'Fraunces', Georgia, serif;
  --font-sans:  'Noto Sans JP', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-label: 'Inter', 'Noto Sans JP', sans-serif;

  /* === モーション === */
  --ease: cubic-bezier(0.2, 0, 0, 1);
  --dur:  0.4s;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.75;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

button { font: inherit; cursor: pointer; border: none; background: none; }

ul { list-style: none; }

/* =========================================================
   Typography
   ========================================================= */
h1, h2 {
  font-family: var(--font-serif);
  font-weight: 500;
  letter-spacing: -0.015em;
  color: var(--color-text);
}

h1 {
  font-size: clamp(1.75rem, 2vw + 1rem, 2.625rem);
  line-height: 1.25;
  letter-spacing: -0.02em;
  font-weight: 700;
}

h2 {
  font-size: clamp(2rem, 3vw + 1rem, 3rem);
  line-height: 1.2;
}

h3 {
  font-family: var(--font-sans);
  font-size: clamp(1.25rem, 1vw + 1rem, 1.5rem);
  line-height: 1.4;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.eyebrow {
  display: inline-block;
  font-family: var(--font-label);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-sub);
}

.lead {
  font-size: clamp(1.125rem, 0.5vw + 1rem, 1.25rem);
  font-weight: 300;
  line-height: 1.7;
  color: var(--color-text-sub);
  max-width: 640px;
}

.caption {
  font-size: 14px;
  color: var(--color-text-mute);
  letter-spacing: 0.02em;
}

/* =========================================================
   Layout
   ========================================================= */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

@media (min-width: 768px)  { .container { padding: 0 48px; } }
@media (min-width: 1200px) { .container { padding: 0 80px; } }
@media (min-width: 1440px) { .container { padding: 0 120px; max-width: 1440px; } }

section { padding: 88px 0; }
@media (min-width: 768px)  { section { padding: 120px 0; } }
@media (min-width: 1200px) { section { padding: 144px 0; } }

/* =========================================================
   Buttons
   ========================================================= */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 500;
  border-radius: 12px;
  transition: all var(--dur) var(--ease);
  white-space: nowrap;
}
@media (min-width: 768px) {
  .btn { padding: 16px 32px; font-size: 16px; }
}

.btn__arrow { transition: transform var(--dur) var(--ease); }
.btn:hover .btn__arrow { transform: translateX(4px); }

.btn--primary       { background: var(--color-bg-dark); color: var(--color-text-on-dark); }
.btn--primary:hover { background: #2D2D2D; transform: translateY(-1px); }

.btn--secondary       { background: transparent; color: var(--color-text); border: 1px solid rgba(26,26,26,0.2); }
.btn--secondary:hover { background: rgba(26,26,26,0.04); border-color: rgba(26,26,26,0.4); }

.btn--light       { background: var(--color-bg); color: var(--color-text); }
.btn--light:hover { background: #E8E5DF; transform: translateY(-1px); }

.btn--outline-light       { background: transparent; color: var(--color-text-on-dark); border: 1px solid rgba(250,250,247,0.3); }
.btn--outline-light:hover { background: rgba(250,250,247,0.08); border-color: rgba(250,250,247,0.6); }

/* =========================================================
   Header
   ========================================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(237, 233, 223, 0.88);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid rgba(26, 26, 26, 0.06);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
  overflow: visible;
}
.site-header.is-scrolled {
  background: rgba(237, 233, 223, 0.95);
  border-bottom-color: var(--color-border-strong);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 16px;
  overflow: visible;
}
@media (min-width: 768px) {
  .site-header__inner { height: 72px; }
}
@media (min-width: 1200px) {
  .site-header__inner { height: 80px; }
}

.site-header__logo {
  display: flex;
  align-items: center;
  z-index: 2;
}
.site-header__logo img {
  height: 140px;
  width: auto;
  display: block;
  margin: -34px 0;
  object-fit: contain;
}
@media (min-width: 768px) {
  .site-header__logo img { height: 170px; margin: -49px 0; }
}
@media (min-width: 1200px) {
  .site-header__logo img { height: 200px; margin: -60px 0; }
}

.site-header__nav {
  display: none;
  gap: 32px;
}
@media (min-width: 1024px) { .site-header__nav { display: flex; } }

.site-header__nav a {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  transition: color 0.2s ease;
}
.site-header__nav a:hover { color: var(--color-accent); }

.site-header__actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
@media (min-width: 768px) { .site-header__actions { gap: 16px; } }

.site-header__login {
  display: none;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  padding: 10px 16px;
  transition: color 0.2s ease;
}
@media (min-width: 640px) { .site-header__login { display: inline-flex; } }
.site-header__login:hover { color: var(--color-accent); }

.site-header__cta { display: none; }
@media (min-width: 768px) { .site-header__cta { display: inline-flex; } }

.hamburger {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 8px;
}
@media (min-width: 1024px) { .hamburger { display: none; } }
.hamburger span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--color-text);
}

/* =========================================================
   Hero (2-column, left-aligned, full viewport)
   ========================================================= */
.hero {
  padding-top: 40px;
  padding-bottom: 56px;
}
@media (min-width: 1024px) {
  .hero {
    min-height: calc(100vh - 128px);
    padding-top: 32px;
    padding-bottom: 40px;
    display: flex;
    align-items: center;
  }
}

.hero__container {
  display: flex;
  flex-direction: column;
  gap: 40px;
  width: 100%;
}
@media (min-width: 1024px) {
  .hero__container { gap: 48px; }
}

.hero__grid {
  display: grid;
  gap: 40px;
  align-items: center;
}
@media (min-width: 1024px) {
  .hero__grid {
    grid-template-columns: 1fr 300px;
    gap: 48px;
  }
}
@media (min-width: 1200px) {
  .hero__grid {
    grid-template-columns: 1fr 340px;
    gap: 64px;
  }
}

.hero__content {
  text-align: left;
  max-width: 640px;
}

.hero__eyebrow { margin-bottom: 20px; }
.hero__title   { margin-bottom: 20px; white-space: normal; }
@media (min-width: 1024px) {
  .hero__title  { white-space: nowrap; }
}

.hero__lead {
  margin: 0 0 32px;
  max-width: 520px;
  font-size: 1rem;
}
@media (min-width: 1024px) { .hero__lead { font-size: 1.0625rem; } }

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: flex-start;
}

.hero__visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 120%;
  max-width: 820px;
  margin: 0 auto;
  background: transparent;
}
@media (min-width: 1024px) {
  .hero__visual { margin: 0 auto 0 -10%; max-width: 920px; }
}
.hero__visual-img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: contain;
  background: transparent;
}

/* =========================================================
   Hero stats bar
   ========================================================= */
.hero__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px 16px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
}
@media (min-width: 768px) {
  .hero__stats {
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
  }
}

.stat { text-align: left; }

.stat__num {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 1.5vw + 1.25rem, 2.25rem);
  font-weight: 500;
  line-height: 1;
  margin-bottom: 6px;
  letter-spacing: -0.02em;
  display: flex;
  align-items: baseline;
}

.stat__unit {
  font-size: 0.55em;
  color: var(--color-accent);
  margin-left: 3px;
  font-weight: 500;
}

.stat__label {
  font-size: 13px;
  color: var(--color-text-sub);
  letter-spacing: 0.02em;
}
@media (min-width: 768px) {
  .stat__label { font-size: 14px; }
}

/* =========================================================
   Section header (shared)
   ========================================================= */
.section-header {
  text-align: center;
  margin-bottom: 64px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}
@media (min-width: 768px) { .section-header { margin-bottom: 96px; } }

.section-header__lead {
  max-width: 560px;
  margin-top: 8px;
}

/* =========================================================
   Trusted logos (minimal + sliding)
   ========================================================= */
.trusted {
  background: var(--color-bg-alt);
  padding: 64px 0;
  overflow: hidden;
}
@media (min-width: 768px) { .trusted { padding: 80px 0; } }

.trusted__label {
  display: block;
  text-align: center;
  margin-bottom: 36px;
}

.trusted__slider {
  position: relative;
  overflow: hidden;
  width: 100%;
  mask-image: linear-gradient(
    to right,
    transparent 0,
    #000 80px,
    #000 calc(100% - 80px),
    transparent 100%
  );
  -webkit-mask-image: linear-gradient(
    to right,
    transparent 0,
    #000 80px,
    #000 calc(100% - 80px),
    transparent 100%
  );
}
.trusted__slider + .trusted__slider {
  margin-top: 24px;
}
@media (min-width: 768px) {
  .trusted__slider + .trusted__slider { margin-top: 32px; }
}

.trusted__track {
  display: flex;
  align-items: center;
  gap: 48px;
  width: max-content;
  animation-duration: 40s;
  animation-timing-function: linear;
  animation-iteration-count: infinite;
}
@media (min-width: 768px) { .trusted__track { gap: 72px; } }

.trusted__track--rtl { animation-name: trusted-slide-rtl; }
.trusted__track--ltr { animation-name: trusted-slide-ltr; }

@keyframes trusted-slide-rtl {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}
@keyframes trusted-slide-ltr {
  from { transform: translateX(-50%); }
  to   { transform: translateX(0); }
}

.trusted__logo-img {
  height: 36px;
  width: auto;
  max-width: 160px;
  object-fit: contain;
  flex-shrink: 0;
  transition: transform 0.3s var(--ease);
}
@media (min-width: 768px) {
  .trusted__logo-img { height: 44px; max-width: 180px; }
}

/* ホバーでスライド一時停止 */
.trusted__slider:hover .trusted__track {
  animation-play-state: paused;
}

@media (prefers-reduced-motion: reduce) {
  .trusted__track { animation: none; }
}

/* =========================================================
   Index Nav (画像#27風・CONTENTS ウォーターマーク + 7アイテム)
   ========================================================= */
.index-nav {
  padding: 56px 0;
  position: relative;
  overflow: hidden;
}
@media (min-width: 768px)  { .index-nav { padding: 64px 0; } }
@media (min-width: 1200px) { .index-nav { padding: 72px 0; } }

.index-nav__header {
  position: relative;
  margin-bottom: 28px;
}
@media (min-width: 768px) { .index-nav__header { margin-bottom: 36px; } }

.index-nav__watermark {
  display: block;
  font-family: var(--font-sans);
  font-size: clamp(2rem, 4.5vw, 4rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: rgba(26, 26, 26, 0.08);
  user-select: none;
  pointer-events: none;
}

.index-nav__label {
  position: absolute;
  bottom: 0;
  left: 0;
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: 0.02em;
  transform: translateY(50%);
}
@media (min-width: 768px) { .index-nav__label { font-size: 17px; } }

.index-nav__dash {
  color: var(--color-text);
  font-weight: 400;
}

.index-nav__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}
@media (min-width: 640px) {
  .index-nav__grid { grid-template-columns: repeat(2, 1fr); column-gap: 32px; }
}
@media (min-width: 1024px) {
  .index-nav__grid { grid-template-columns: repeat(3, 1fr); column-gap: 48px; }
}

.index-item {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 24px 4px;
  border-bottom: 1px solid var(--color-border-strong);
  color: var(--color-text);
  transition: color 0.2s ease, padding-left 0.2s ease;
}
.index-item:hover {
  color: var(--color-accent);
  padding-left: 8px;
}

.index-item__num {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--color-text-sub);
  min-width: 24px;
}

.index-item__name {
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.01em;
}
@media (min-width: 768px) { .index-item__name { font-size: 18px; } }

/* =========================================================
   Challenges — Pain Points (2x2 grid of cards)
   ========================================================= */
.challenges {
  background: var(--color-bg-alt);
}

.challenges__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}
@media (min-width: 640px) {
  .challenges__grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
}
@media (min-width: 1024px) {
  .challenges__grid { grid-template-columns: repeat(4, 1fr); gap: 20px; }
}

.challenge-card {
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 28px 24px 26px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  overflow: hidden;
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.challenge-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent) 0%, #E2A885 100%);
  opacity: 0;
  transition: opacity 0.3s ease;
}
@media (min-width: 1024px) { .challenge-card { padding: 32px 28px 30px; } }
.challenge-card:hover {
  transform: translateY(-4px);
  border-color: rgba(199, 122, 82, 0.3);
  box-shadow: 0 16px 32px -16px rgba(199, 122, 82, 0.2);
}
.challenge-card:hover::before { opacity: 1; }

.challenge-card__num {
  position: absolute;
  top: 18px;
  right: 20px;
  font-family: 'Inter', sans-serif;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  opacity: 0.55;
}

.challenge-card__icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(199, 122, 82, 0.14) 0%, rgba(199, 122, 82, 0.06) 100%);
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 4px;
}

/* イラスト画像 */
.challenge-card__illust {
  width: 100%;
  aspect-ratio: 1 / 1;
  margin: -8px -8px 8px;
  width: calc(100% + 16px);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.challenge-card__illust img {
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: contain;
  display: block;
  background: transparent;
}

.challenge-card__title {
  font-family: var(--font-serif);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.5;
  color: var(--color-text);
  margin: 0;
}
@media (min-width: 768px) { .challenge-card__title { font-size: 18px; } }

.challenge-card__desc {
  margin: 0;
  font-size: 13.5px;
  color: var(--color-text-sub);
  line-height: 1.8;
}

/* =========================================================
   Approach — Why 余白とAI (2x2 number grid)
   ========================================================= */
.approach__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}
@media (min-width: 768px) {
  .approach__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 48px 64px;
  }
}

.approach-card {
  padding-top: 28px;
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.approach-card__num {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 500;
  color: var(--color-accent);
  line-height: 1;
  letter-spacing: -0.02em;
}

.approach-card__title {
  font-family: var(--font-serif);
  font-size: clamp(1.375rem, 1.5vw + 1rem, 1.75rem);
  font-weight: 500;
  line-height: 1.35;
  letter-spacing: -0.015em;
  color: var(--color-text);
}

.approach-card__desc {
  font-size: 15px;
  color: var(--color-text-sub);
  line-height: 1.85;
}

/* =========================================================
   Courses — Horizontal feature rows (Service-style)
   ========================================================= */
.courses__list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--color-border);
}

.course-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  padding: 56px 0;
  border-bottom: 1px solid var(--color-border);
}
@media (min-width: 768px) {
  .course-row {
    grid-template-columns: 1.1fr 1fr;
    gap: 64px;
    padding: 72px 0;
    align-items: center;
  }
}
@media (min-width: 1200px) {
  .course-row { gap: 96px; }
}

.course-row__body {
  display: flex;
  flex-direction: column;
}

.course-row__label {
  font-family: var(--font-label);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: var(--color-text-sub);
  margin-bottom: 20px;
  text-transform: uppercase;
}

.course-row__ja {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 3vw + 1rem, 2.875rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1;
  color: var(--color-text);
  margin-bottom: 6px;
}

.course-row__en {
  font-family: var(--font-label);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: var(--color-text-mute);
  text-transform: uppercase;
  margin-bottom: 24px;
}

.course-row__name {
  font-family: var(--font-sans);
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 14px;
  letter-spacing: -0.01em;
}

.course-row__desc {
  font-size: 15px;
  color: var(--color-text-sub);
  line-height: 1.85;
  margin-bottom: 24px;
  max-width: 480px;
}

.course-row__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  padding: 4px 0;
  align-self: flex-start;
  border-bottom: 1px solid var(--color-border-strong);
  transition: color 0.2s ease, border-color 0.2s ease, gap 0.2s ease;
}
.course-row__link span { transition: transform 0.2s ease; }
.course-row__link:hover {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}
.course-row__link:hover span { transform: translateX(4px); }

.course-row__image {
  aspect-ratio: 16 / 10;
  border-radius: 16px;
  overflow: hidden;
  background:
    radial-gradient(circle at 70% 30%, rgba(199, 122, 82, 0.12), transparent 55%),
    linear-gradient(135deg, #F2EFE9 0%, #E8DDCE 100%);
}
.course-row__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.course-row__image.is-empty img { display: none; }

/* =========================================================
   Preview — Video card grid (catalog)
   ========================================================= */
.preview {
  background: var(--color-bg-alt);
}
.preview .section-header { margin-bottom: 56px; }
@media (min-width: 768px) { .preview .section-header { margin-bottom: 72px; } }

/* =========================================================
   Services — Other KALEIDO offerings (2-col card grid)
   Cases と続けて配置するため下padding を詰める
   ========================================================= */
.services { padding-top: 32px; padding-bottom: 48px; }
@media (min-width: 768px)  { .services { padding-top: 40px; padding-bottom: 64px; } }
@media (min-width: 1200px) { .services { padding-top: 48px; padding-bottom: 80px; } }
.services .section-header { margin-bottom: 32px; }
@media (min-width: 768px)  { .services .section-header { margin-bottom: 40px; } }

/* Cases は下の余白を詰めてServicesと近接させる */
#cases { padding-top: 48px; padding-bottom: 32px; }
@media (min-width: 768px)  { #cases { padding-top: 64px; padding-bottom: 40px; } }
@media (min-width: 1200px) { #cases { padding-top: 80px; padding-bottom: 48px; } }


.services__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  max-width: 1000px;
  margin: 0 auto;
}
@media (min-width: 768px) {
  .services__grid { grid-template-columns: repeat(2, 1fr); gap: 28px; }
}

.service-card {
  display: flex;
  flex-direction: column;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  overflow: hidden;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.service-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(26, 26, 26, 0.06);
}

.service-card__image {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--color-bg-alt);
}
.service-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.service-card__image.is-empty img { display: none; }

.service-card__body {
  padding: 28px 28px 32px;
  display: flex;
  flex-direction: column;
}
@media (min-width: 768px) { .service-card__body { padding: 32px 32px 36px; } }

.service-card__label {
  font-family: var(--font-label);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: var(--color-text-sub);
  margin-bottom: 14px;
  text-transform: uppercase;
}

.service-card__ja {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 2vw + 1rem, 2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1;
  color: var(--color-text);
  margin-bottom: 14px;
  display: flex;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
}

.service-card__en {
  font-family: var(--font-label);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: var(--color-text-mute);
  text-transform: uppercase;
}

.service-card__name {
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.service-card__desc {
  font-size: 14px;
  color: var(--color-text-sub);
  line-height: 1.8;
  margin-bottom: 20px;
}

.service-card__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  padding: 4px 0;
  align-self: flex-start;
  border-bottom: 1px solid var(--color-border-strong);
  transition: color 0.2s ease, border-color 0.2s ease;
}
.service-card__link span { transition: transform 0.2s ease; }
.service-card:hover .service-card__link {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}
.service-card:hover .service-card__link span { transform: translateX(4px); }

/* =========================================================
   Course cards (video preview) — shared with Preview section
   ========================================================= */
.courses__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}
@media (min-width: 640px) {
  .courses__grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }
}
@media (min-width: 1200px) {
  .courses__grid { grid-template-columns: repeat(4, 1fr); gap: 24px; }
}

.course-card {
  display: flex;
  flex-direction: column;
  transition: transform var(--dur) var(--ease);
}
.course-card:hover { transform: translateY(-4px); }

.course-card__thumb {
  position: relative;
  aspect-ratio: 16 / 10;
  border-radius: 14px;
  overflow: hidden;
  margin-bottom: 16px;
  background:
    radial-gradient(circle at 70% 30%, rgba(199, 122, 82, 0.15), transparent 55%),
    linear-gradient(135deg, #F2EFE9 0%, #E8DDCE 100%);
  transition: box-shadow var(--dur) var(--ease);
  cursor: pointer;
}
.course-card:hover .course-card__thumb {
  box-shadow: 0 12px 32px rgba(26, 26, 26, 0.1);
}

/* 講座別の色バリエーション（ポスター画像なし時の差別化） */
.course-card__thumb--gemini {
  background:
    radial-gradient(circle at 70% 30%, rgba(120, 145, 195, 0.32), transparent 55%),
    linear-gradient(135deg, #ECEBF2 0%, #D8D4E2 100%);
}
.course-card__thumb--workspace {
  background:
    radial-gradient(circle at 30% 70%, rgba(135, 175, 135, 0.28), transparent 55%),
    linear-gradient(135deg, #EDF0E6 0%, #DCE0CC 100%);
}
.course-card__thumb--notebook {
  background:
    radial-gradient(circle at 70% 70%, rgba(220, 150, 100, 0.28), transparent 55%),
    linear-gradient(135deg, #F3EEE5 0%, #E5DBC9 100%);
}
.course-card__thumb--claude {
  background:
    radial-gradient(circle at 50% 50%, rgba(60, 60, 70, 0.20), transparent 60%),
    linear-gradient(135deg, #E8E6E2 0%, #CBC7BF 100%);
}

/* ポスター画像（あれば表示、なければCSSグラデが見える） */
.course-card__poster {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}

/* 動画再生中はポスター非表示、video要素を表示 */
.course-card__video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 2;
}
.course-card.is-playing .course-card__play,
.course-card.is-playing .course-card__poster,
.course-card.is-playing .course-card__badge {
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.course-card__badge {
  position: absolute;
  top: 12px;
  left: 12px;
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 500;
  padding: 4px 10px;
  background: var(--color-bg-dark);
  color: var(--color-text-on-dark);
  border-radius: 999px;
  letter-spacing: 0.02em;
}

.course-card__play {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-surface);
  color: var(--color-text);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 14px rgba(26, 26, 26, 0.12);
  transition: transform var(--dur) var(--ease);
  z-index: 3;
  cursor: pointer;
}
.course-card__badge { z-index: 3; }
.course-card:hover .course-card__play {
  transform: translate(-50%, -50%) scale(1.08);
}
.course-card__play svg { margin-left: 2px; }

.course-card__category {
  font-size: 12px;
  color: var(--color-text-sub);
  margin-bottom: 6px;
  letter-spacing: 0.04em;
}

.course-card__title {
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
  line-height: 1.4;
  color: var(--color-text);
}

.course-card__desc {
  font-size: 14px;
  color: var(--color-text-sub);
  line-height: 1.7;
  margin-bottom: 14px;
  flex: 1;
}

.course-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 12px;
  color: var(--color-text-mute);
  letter-spacing: 0.02em;
}

/* See all link */
.courses__more {
  text-align: center;
  margin-top: 64px;
}

.link-arrow {
  display: inline-block;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  padding: 6px 0;
  border-bottom: 1px solid var(--color-border-strong);
  transition: color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}
.link-arrow:hover {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
  transform: translateX(2px);
}

/* =========================================================
   Platform — Login後イメージ（2カラム）
   ========================================================= */
.platform__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  align-items: center;
}
@media (min-width: 1024px) {
  .platform__grid { grid-template-columns: 1fr 1fr; gap: 80px; }
}

.platform__body .eyebrow { margin-bottom: 20px; display: inline-block; }

.platform__title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 3vw + 1rem, 3rem);
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: -0.015em;
  color: var(--color-text);
  margin-bottom: 24px;
}

.platform__desc {
  font-size: 15px;
  color: var(--color-text-sub);
  line-height: 1.85;
  margin-bottom: 28px;
}

.platform__features {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 32px;
  padding: 0;
  list-style: none;
}
.platform__features li {
  font-size: 14px;
  color: var(--color-text);
  padding-left: 28px;
  position: relative;
  line-height: 1.6;
}
.platform__features li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 9px;
  width: 14px;
  height: 7px;
  border-left: 1.5px solid var(--color-accent);
  border-bottom: 1.5px solid var(--color-accent);
  transform: rotate(-45deg);
}

.platform__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  padding: 4px 0;
  border-bottom: 1px solid var(--color-border-strong);
  transition: color 0.2s ease, border-color 0.2s ease;
}
.platform__link span { transition: transform 0.2s ease; }
.platform__link:hover {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}
.platform__link:hover span { transform: translateX(4px); }

/* モックアップ */
.platform__mockup {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 20px;
  background: var(--color-bg-alt);
  border-radius: 20px;
  border: 1px solid var(--color-border);
}

.platform__mockup-main {
  aspect-ratio: 16 / 10;
  border-radius: 14px;
  overflow: hidden;
  position: relative;
  background:
    linear-gradient(135deg, #2A2A28 0%, #1A1A1A 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}

.platform__mockup-header {
  position: absolute;
  top: 14px;
  left: 14px;
  display: flex;
  gap: 6px;
  z-index: 2;
}

.platform__mockup-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.25);
}

.platform__mockup-video {
  color: rgba(255, 255, 255, 0.85);
  display: flex;
  align-items: center;
  justify-content: center;
}

.platform__mockup-caption {
  position: absolute;
  top: 14px;
  left: 40px;
  font-size: 11px;
  color: rgba(255, 255, 255, 0.65);
  letter-spacing: 0.02em;
}

.platform__mockup-chat {
  position: absolute;
  bottom: 14px;
  left: 14px;
  right: 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 11px;
}
.platform__mockup-chat-q {
  align-self: flex-end;
  padding: 8px 12px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 12px 12px 2px 12px;
  color: rgba(255, 255, 255, 0.95);
  max-width: 78%;
}
.platform__mockup-chat-a {
  align-self: flex-start;
  padding: 8px 12px;
  background: rgba(199, 122, 82, 0.85);
  border-radius: 12px 12px 12px 2px;
  color: #FAFAF7;
  max-width: 85%;
  display: flex;
  gap: 6px;
  align-items: flex-start;
}
.platform__mockup-chat-a span {
  flex-shrink: 0;
  font-size: 9px;
  font-weight: 600;
  background: rgba(255, 255, 255, 0.25);
  padding: 2px 6px;
  border-radius: 4px;
  letter-spacing: 0.06em;
}

.platform__mockup-thumbs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.platform__mockup-thumb {
  aspect-ratio: 16 / 10;
  border-radius: 8px;
  background: linear-gradient(135deg, #F2EFE9 0%, #E8DDCE 100%);
  opacity: 0.7;
}
.platform__mockup-thumb:first-child {
  opacity: 1;
  outline: 2px solid var(--color-accent);
  outline-offset: -2px;
}

/* =========================================================
   Features (dark)
   ========================================================= */
.features {
  background: var(--color-bg-dark);
  color: var(--color-text-on-dark);
}
.features h2 { color: var(--color-text-on-dark); }
.features .eyebrow { color: var(--color-text-mute); }
.features .section-header__lead { color: rgba(250,250,247,0.7); }

.features__grid {
  display: grid;
  gap: 40px;
}
@media (min-width: 768px) { .features__grid { grid-template-columns: repeat(3, 1fr); gap: 32px; } }

.feature {
  padding-top: 32px;
  border-top: 1px solid var(--color-border-on-dark);
}

.feature__icon {
  color: var(--color-accent);
  margin-bottom: 24px;
}

.feature__title {
  color: var(--color-text-on-dark);
  margin-bottom: 12px;
}

.feature__desc {
  color: rgba(250,250,247,0.6);
  font-size: 15px;
  line-height: 1.75;
}

/* =========================================================
   Cases — Horizontal swipeable carousel
   ========================================================= */
.cases__carousel {
  position: relative;
  /* はみ出し許可してsection padding分を打ち消す */
  margin: 0 -24px;
}
@media (min-width: 768px) { .cases__carousel { margin: 0 -48px; } }
@media (min-width: 1200px) { .cases__carousel { margin: 0 -80px; } }

.cases__track {
  display: flex;
  gap: 20px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  padding: 8px 24px 32px;
  /* スクロールバー隠し */
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.cases__track::-webkit-scrollbar { display: none; }
@media (min-width: 768px) { .cases__track { padding: 8px 48px 32px; gap: 24px; } }
@media (min-width: 1200px) { .cases__track { padding: 8px 80px 32px; } }

.case-card {
  flex: 0 0 auto;
  width: calc(85% - 12px);
  max-width: 360px;
  scroll-snap-align: start;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
@media (min-width: 640px) { .case-card { width: 340px; } }
@media (min-width: 1024px) { .case-card { width: 380px; } }
.case-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(26, 26, 26, 0.06);
}

.case-card__image {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--color-bg-alt);
}
.case-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform var(--dur) var(--ease);
}
.case-card:hover .case-card__image img { transform: scale(1.04); }

.case-card__body {
  padding: 24px 22px 26px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
}
@media (min-width: 1024px) { .case-card__body { padding: 28px 26px 30px; } }

.case-card__tag {
  display: inline-block;
  font-family: var(--font-label);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  background: rgba(199, 122, 82, 0.08);
  padding: 4px 10px;
  border-radius: 999px;
  align-self: flex-start;
}

.case-card__meta {
  font-size: 12px;
  color: var(--color-text-mute);
  letter-spacing: 0.02em;
}

.case-card__title {
  font-family: var(--font-serif);
  font-size: clamp(1.25rem, 0.5vw + 1rem, 1.5rem);
  font-weight: 500;
  line-height: 1.35;
  letter-spacing: -0.015em;
  color: var(--color-text);
  margin-top: 2px;
}

.case-card__desc {
  font-size: 13px;
  color: var(--color-text-sub);
  line-height: 1.75;
  margin-top: 2px;
  flex: 1;
}

.case-card__courses {
  font-size: 11px;
  color: var(--color-text-sub);
  padding-top: 14px;
  border-top: 1px solid var(--color-border);
  letter-spacing: 0.02em;
}

/* Carousel controls */
.cases__controls {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 16px;
  padding: 0 24px;
}
@media (min-width: 768px) { .cases__controls { padding: 0 48px; } }

.cases__btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--color-border-strong);
  background: var(--color-surface);
  color: var(--color-text);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
}
.cases__btn:hover {
  border-color: var(--color-text);
  background: var(--color-text);
  color: var(--color-text-on-dark);
}
.cases__btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

/* =========================================================
   Mid CTA band (途中CTA — 事例と料金の間など)
   ========================================================= */
.mid-cta {
  padding: 64px 0;
  background: var(--color-bg-dark);
  color: var(--color-text-on-dark);
  text-align: center;
}
@media (min-width: 768px) { .mid-cta { padding: 88px 0; } }

/* ライトバージョン（ページ中盤の軽めCTA） */
.mid-cta--light {
  background: var(--color-bg-alt);
  color: var(--color-text);
  padding: 56px 0;
}
@media (min-width: 768px) { .mid-cta--light { padding: 72px 0; } }
.mid-cta--light .mid-cta__title { color: var(--color-text); }
.mid-cta--light .mid-cta__desc { color: var(--color-text-sub); }

.mid-cta__title {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 2vw + 1rem, 2.75rem);
  font-weight: 500;
  line-height: 1.25;
  letter-spacing: -0.015em;
  color: var(--color-text-on-dark);
  margin-bottom: 16px;
}

.mid-cta__desc {
  font-size: 15px;
  color: rgba(250, 250, 247, 0.7);
  margin-bottom: 32px;
  line-height: 1.7;
}

.sp-only { display: inline; }
@media (min-width: 640px) { .sp-only { display: none; } }

.mid-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}
.mid-cta .btn--primary {
  background: var(--color-bg);
  color: var(--color-text);
}
.mid-cta .btn--primary:hover { background: #E8E5DF; }
.mid-cta .btn--secondary {
  background: transparent;
  color: var(--color-text-on-dark);
  border-color: rgba(250, 250, 247, 0.3);
}
.mid-cta .btn--secondary:hover {
  background: rgba(250, 250, 247, 0.08);
  border-color: rgba(250, 250, 247, 0.6);
}

/* ライト版CTA内のボタン: 背景と同化しないよう上書き */
.mid-cta--light .btn--primary {
  background: var(--color-bg-dark);
  color: var(--color-text-on-dark);
}
.mid-cta--light .btn--primary:hover { background: #2D2D2D; }
.mid-cta--light .btn--secondary {
  background: #FFFFFF;
  color: var(--color-text);
  border-color: rgba(26, 26, 26, 0.25);
}
.mid-cta--light .btn--secondary:hover {
  background: #FAFAF7;
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* =========================================================
   Pricing
   ========================================================= */
.pricing { background: var(--color-bg-alt); }

.pricing__users {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  margin: 0 auto 40px;
}

.pricing-avatars {
  display: flex;
}
.pricing-avatars__img {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 2px solid var(--color-bg-alt);
  object-fit: cover;
  margin-left: -10px;
  background: var(--color-surface);
}
.pricing-avatars__img:first-child { margin-left: 0; }

.pricing-avatars__text {
  font-size: 13px;
  color: var(--color-text-sub);
  letter-spacing: 0.02em;
}
.pricing-avatars__text strong {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
  margin: 0 3px;
}

.pricing__points {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  max-width: 960px;
  margin: 0 auto 48px;
  padding: 20px 24px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 16px;
}
@media (min-width: 768px) {
  .pricing__points {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    padding: 24px 32px;
    margin-bottom: 56px;
  }
}

.pricing-point {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.pricing-point__icon {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(199, 122, 82, 0.10);
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
}

.pricing-point__title {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  line-height: 1.4;
  letter-spacing: -0.01em;
}
.pricing-point__title strong {
  font-family: var(--font-serif);
  font-size: 17px;
  font-weight: 700;
  color: var(--color-text);
  margin: 0 2px;
}

.pricing-point__desc {
  font-size: 12px;
  color: var(--color-text-sub);
  margin-top: 2px;
  line-height: 1.5;
  letter-spacing: 0.02em;
}

.pricing__grid {
  display: grid;
  gap: 24px;
  max-width: 960px;
  margin: 0 auto;
}
@media (min-width: 768px) { .pricing__grid { grid-template-columns: 1fr 1fr; } }

.plan {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  padding: 40px;
  display: flex;
  flex-direction: column;
  position: relative;
}
@media (min-width: 768px) { .plan { padding: 48px; } }

.plan--dark {
  background: var(--color-bg-dark);
  color: var(--color-text-on-dark);
  border-color: transparent;
}

.plan__badge {
  position: absolute;
  top: 24px;
  right: 24px;
  font-family: var(--font-label);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.plan__name {
  font-family: var(--font-serif);
  font-size: 28px;
  font-weight: 500;
  margin-bottom: 24px;
}
.plan--dark .plan__name { color: var(--color-text-on-dark); }

.plan__price {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 8px;
}
.plan__price-main {
  font-size: 48px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.02em;
}
.plan__price-note { font-size: 14px; color: var(--color-text-sub); }
.plan--dark .plan__price-note { color: rgba(250,250,247,0.6); }

.plan__note {
  font-size: 14px;
  color: var(--color-text-sub);
  margin-bottom: 32px;
}
.plan--dark .plan__note { color: rgba(250,250,247,0.7); }

.plan__list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 32px;
  flex: 1;
}
.plan__list li {
  font-size: 15px;
  padding-left: 26px;
  position: relative;
  color: var(--color-text-sub);
  line-height: 1.6;
}
.plan--dark .plan__list li { color: rgba(250,250,247,0.85); }
.plan__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 9px;
  width: 14px;
  height: 7px;
  border-left: 1.5px solid var(--color-accent);
  border-bottom: 1.5px solid var(--color-accent);
  transform: rotate(-45deg);
}
.plan__list li strong { font-weight: 500; color: var(--color-text); }
.plan--dark .plan__list li strong { color: var(--color-text-on-dark); }

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

/* =========================================================
   Process / Flow
   ========================================================= */
.process__grid {
  display: grid;
  gap: 40px;
}
@media (min-width: 768px) { .process__grid { grid-template-columns: repeat(4, 1fr); gap: 24px; } }

.step {
  position: relative;
  padding: 32px 20px 28px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  text-align: center;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}
.step:hover {
  transform: translateY(-4px);
  border-color: rgba(199, 122, 82, 0.3);
  box-shadow: 0 16px 32px -16px rgba(199, 122, 82, 0.2);
}

/* 矢印で連続性（PCのみ） */
@media (min-width: 768px) {
  .step:not(:last-child)::after {
    content: "→";
    position: absolute;
    top: 50%;
    right: -18px;
    transform: translateY(-50%);
    font-size: 20px;
    font-weight: 300;
    color: var(--color-accent);
    opacity: 0.5;
    z-index: 1;
  }
}

.step__badge {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 18px;
}

.step__num {
  font-family: 'Noto Serif JP', serif;
  font-size: 40px;
  font-weight: 700;
  line-height: 1;
  color: var(--color-accent);
  letter-spacing: -0.02em;
}

.step__icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(199, 122, 82, 0.14) 0%, rgba(199, 122, 82, 0.06) 100%);
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.step__title {
  margin: 0 0 10px;
  font-family: 'Noto Serif JP', serif;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--color-text);
}

.step__desc {
  margin: 0;
  font-size: 13px;
  color: var(--color-text-sub);
  line-height: 1.75;
}

/* =========================================================
   FAQ
   ========================================================= */
.faq { background: var(--color-bg-alt); }

.faq__list {
  max-width: 820px;
  margin: 0 auto;
}

.faq__item {
  border-bottom: 1px solid var(--color-border);
}

.faq__question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 24px 0;
  width: 100%;
  text-align: left;
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 500;
  color: var(--color-text);
  transition: color 0.2s ease;
}
@media (min-width: 768px) { .faq__question { font-size: 17px; padding: 28px 0; } }
.faq__question:hover { color: var(--color-accent); }

.faq__icon {
  flex-shrink: 0;
  transition: transform var(--dur) var(--ease);
}
.faq__item.is-open .faq__icon { transform: rotate(45deg); }

.faq__answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--dur) var(--ease);
}
.faq__item.is-open .faq__answer { max-height: 400px; }

.faq__answer-inner {
  padding: 0 0 28px;
  color: var(--color-text-sub);
  line-height: 1.8;
  max-width: 680px;
}

/* =========================================================
   Company (運営会社)
   ========================================================= */
.company { background: var(--color-bg-alt); }

.company__grid {
  max-width: 820px;
  margin: 0 auto;
}

.company__body .eyebrow { display: inline-block; margin-bottom: 20px; }

.company__title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 2.5vw + 1rem, 2.75rem);
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: -0.015em;
  margin-bottom: 24px;
}

.company__intro {
  font-size: 15px;
  color: var(--color-text-sub);
  line-height: 1.85;
  margin-bottom: 32px;
}

.company__info {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 28px 0 8px;
  border-top: 1px solid var(--color-border);
  margin-bottom: 32px;
}
.company__info > div {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 16px;
  align-items: start;
}
@media (min-width: 768px) {
  .company__info > div { grid-template-columns: 140px 1fr; }
}

.company__info dt {
  font-family: var(--font-label);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-sub);
  padding-top: 3px;
}

.company__info dd {
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.7;
}

.company__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  padding: 4px 0;
  border-bottom: 1px solid var(--color-border-strong);
  transition: color 0.2s ease, border-color 0.2s ease;
}
.company__link span { transition: transform 0.2s ease; }
.company__link:hover {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}
.company__link:hover span { transform: translateX(4px); }

/* =========================================================
   Final CTA
   ========================================================= */
.final-cta {
  background: var(--color-bg-dark);
  color: var(--color-text-on-dark);
  text-align: center;
}

.final-cta h2 {
  color: var(--color-text-on-dark);
  font-size: clamp(2.25rem, 4vw + 1rem, 4rem);
  margin-bottom: 24px;
}

.final-cta__lead {
  color: rgba(250,250,247,0.7);
  max-width: 560px;
  margin: 0 auto 48px;
}

.final-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-bottom: 40px;
}

.final-cta__phone {
  font-family: var(--font-label);
  font-size: 14px;
  color: var(--color-text-mute);
  letter-spacing: 0.02em;
}

/* Final CTA 実績統計バー */
.final-cta__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px 16px;
  max-width: 760px;
  margin: 32px auto 40px;
  padding: 24px 16px;
  background: rgba(250, 250, 247, 0.04);
  border: 1px solid rgba(250, 250, 247, 0.1);
  border-radius: 16px;
}
@media (min-width: 768px) {
  .final-cta__stats { grid-template-columns: repeat(4, 1fr); gap: 8px; margin: 40px auto 48px; padding: 28px 24px; }
}
.final-cta__stat { text-align: center; }
.final-cta__stat-num {
  margin: 0 0 4px;
  font-family: 'Noto Serif JP', serif;
  font-size: clamp(32px, 4vw, 42px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: #FAFAF7;
}
.final-cta__stat-num span {
  font-size: 0.55em;
  font-weight: 500;
  margin-left: 2px;
  color: var(--color-accent);
}
.final-cta__stat-label {
  margin: 0;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: rgba(250, 250, 247, 0.65);
}

.final-cta__contact {
  margin-top: 40px;
  text-align: center;
}
.final-cta__contact-label {
  margin: 0 0 10px;
  font-family: 'Inter', sans-serif;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(250, 250, 247, 0.5);
}
.final-cta__contact-email {
  margin: 0 0 6px;
  font-family: 'Noto Serif JP', serif;
  font-size: 20px;
  font-weight: 500;
  letter-spacing: 0;
}
.final-cta__contact-email a {
  color: #FAFAF7;
  text-decoration: none;
  border-bottom: 1px solid rgba(250, 250, 247, 0.25);
  padding-bottom: 3px;
  transition: border-color 0.3s;
}
.final-cta__contact-email a:hover { border-color: var(--color-accent); }
.final-cta__contact-phone {
  margin: 0;
  font-family: var(--font-label);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: rgba(250, 250, 247, 0.55);
}

/* =========================================================
   Footer
   ========================================================= */
.site-footer {
  background: var(--color-bg);
  padding: 80px 0 40px;
  border-top: 1px solid var(--color-border);
}

.site-footer__grid {
  display: grid;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--color-border);
}
@media (min-width: 768px) { .site-footer__grid { grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; } }

.footer-brand__logo {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 500;
  margin-bottom: 14px;
  letter-spacing: -0.01em;
}

.footer-brand__tagline {
  font-size: 14px;
  color: var(--color-text-sub);
  max-width: 320px;
  line-height: 1.75;
}

.footer-col__title {
  font-family: var(--font-label);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-sub);
  margin-bottom: 20px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.footer-col a {
  font-size: 15px;
  color: var(--color-text);
  transition: color 0.2s ease;
}
.footer-col a:hover { color: var(--color-accent); }

.site-footer__bottom {
  padding-top: 32px;
  font-family: var(--font-label);
  font-size: 13px;
  color: var(--color-text-mute);
  letter-spacing: 0.02em;
}

/* =========================================================
   Scroll reveal
   ========================================================= */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* =========================================================
   Focus & motion preferences
   ========================================================= */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 4px;
  border-radius: 4px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* =========================================================
   Mobile Polish — 375〜480px 実機クオリティ調整
   (既存の min-width ベースを一切壊さず、max-width で上書き)
   ========================================================= */

/* ========== Mobile drawer nav (〜1023.98px) — 2026-04-14 ハンバーガー復活 ========== */
/* PC用の mobile-only 項目は常に非表示 */
.site-header__nav-mobile { display: none; }

@media (max-width: 1023.98px) {
  /* 右スライド式ドロワー本体（最小構成・確実に見える実装） */
  .site-header__nav {
    position: fixed !important;
    top: 0;
    right: 0;
    bottom: 0;
    left: auto;
    display: flex !important;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: min(86vw, 340px);
    height: 100vh;
    height: 100dvh;
    margin: 0;
    padding: 88px 24px 40px;
    background: #FAFAF7;
    box-shadow: -16px 0 48px rgba(26, 26, 26, 0.12);
    transform: translateX(100%);
    transition: transform 0.35s var(--ease);
    z-index: 90;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    pointer-events: auto;
    visibility: visible;
    opacity: 1;
  }
  /* ドロワー内のリンク（通常＋モバイル専用CTAを含む全て） */
  .site-header__nav > a {
    display: block;
    width: 100%;
    font-family: 'Noto Sans JP', sans-serif;
    font-size: 16px;
    font-weight: 500;
    color: var(--color-text);
    padding: 16px 4px;
    border-bottom: 1px solid rgba(26, 26, 26, 0.08);
    text-decoration: none;
    line-height: 1.5;
    background: transparent;
    opacity: 1 !important;
    visibility: visible !important;
    transform: none !important;
  }
  .site-header__nav > a:hover { color: var(--color-accent); }

  /* mobile-only 項目を表示 */
  .site-header__nav-mobile { display: block !important; }
  .site-header__nav-mobile--primary {
    margin-top: 14px;
    padding: 14px 16px !important;
    background: var(--color-accent) !important;
    color: #FFFFFF !important;
    border: none !important;
    border-radius: 10px;
    font-weight: 600 !important;
    text-align: center;
  }

  /* 開いた状態 */
  body.is-nav-open .site-header__nav { transform: translateX(0); }

  /* 背景オーバーレイ */
  body.is-nav-open::before {
    content: '';
    position: fixed;
    inset: 0;
    background: rgba(26, 26, 26, 0.36);
    z-index: 80;
    backdrop-filter: blur(2px);
  }
  body.is-nav-open { overflow: hidden; }

  /* ハンバーガー → ✕ アニメーション */
  .hamburger { position: relative; z-index: 100; }
  .hamburger span { transition: transform 0.3s var(--ease), opacity 0.2s; }
  body.is-nav-open .hamburger span:nth-child(1) { transform: translateY(5.5px) rotate(45deg); }
  body.is-nav-open .hamburger span:nth-child(2) { opacity: 0; }
  body.is-nav-open .hamburger span:nth-child(3) { transform: translateY(-5.5px) rotate(-45deg); }
}

/* ========== 〜767px 共通 ========== */
@media (max-width: 767.98px) {
  /* セクション余白の引き締め */
  section { padding: 72px 0; }
  .section-header { margin-bottom: 48px; }

  /* Hero: タイトル/リード/アクションの可読性 */
  .hero { padding-top: 32px; padding-bottom: 40px; }
  .hero__title { font-size: clamp(1.75rem, 7.5vw, 2.25rem); line-height: 1.3; }
  .hero__title br { display: none; }
  .hero__lead br { display: none; }
  .hero__lead { font-size: 0.95rem; line-height: 1.8; }
  .hero__actions { gap: 10px; flex-direction: column; align-items: stretch; }
  .hero__actions .btn { justify-content: center; width: 100%; }
  .hero__visual { width: 100%; max-width: 520px; }

  /* Hero stats: 余白圧縮・数値スケール */
  .hero__stats { padding-top: 24px; gap: 20px 12px; }
  .stat__num { font-size: 1.6rem; }

  /* Header: ロゴ巨大余白を軽減 */
  .site-header__inner { height: 60px; gap: 12px; }
  .site-header__logo img { height: 110px; margin: -26px 0; }
  .btn { padding: 12px 22px; font-size: 14px; }
  .site-header__actions { gap: 8px; }
  .site-header__actions .btn { padding: 10px 16px; font-size: 13px; }

  /* Trusted: ロゴ間隔 & ラベル */
  .trusted { padding: 48px 0; }
  .trusted__track { gap: 36px; }
  .trusted__logo-img { height: 30px; max-width: 130px; }

  /* Index Nav: 目次アイテム padding */
  .index-item { padding: 18px 4px; gap: 14px; }
  .index-item__name { font-size: 15px; }

  /* Challenges card: illust/余白最適化 */
  .challenge-card { padding: 22px 20px 22px; }
  .challenge-card__illust { aspect-ratio: 4 / 3; }

  /* Courses rows: 写真を小さめ、余白圧縮 */
  .course-row { padding: 40px 0; gap: 24px; }
  .course-row__ja { font-size: clamp(1.75rem, 7vw, 2.125rem); }
  .course-row__desc { font-size: 14px; }

  /* Service cards */
  .service-card__body { padding: 24px 22px 28px; }
  .service-card__ja { font-size: 1.45rem; gap: 8px; }

  /* Preview / courses grid */
  .courses__grid { gap: 24px; }
  .courses__more { margin-top: 40px; }

  /* Platform mockup: はみ出し防止 + 文字縮小 */
  .platform__grid { gap: 36px; }
  .platform__title { font-size: clamp(1.6rem, 6.5vw, 2.25rem); margin-bottom: 18px; }
  .platform__mockup { padding: 14px; gap: 10px; border-radius: 16px; }
  .platform__mockup-chat { font-size: 10px; gap: 6px; }
  .platform__mockup-chat-a span { font-size: 8px; }

  /* Features (dark) */
  .features__grid { gap: 32px; }
  .feature { padding-top: 24px; }

  /* Cases carousel: カード幅を見やすく */
  .case-card { width: calc(88% - 8px); }
  .case-card__body { padding: 20px 18px 22px; gap: 8px; }
  .case-card__title { font-size: 1.15rem; }
  .case-card__desc { font-size: 12.5px; }

  /* Mid CTA */
  .mid-cta { padding: 56px 0; }
  .mid-cta--light { padding: 48px 0; }
  .mid-cta__title { font-size: clamp(1.5rem, 6vw, 2rem); }
  .mid-cta__desc { font-size: 14px; margin-bottom: 24px; }
  .mid-cta__actions { flex-direction: column; align-items: stretch; }
  .mid-cta__actions .btn { justify-content: center; width: 100%; }

  /* Pricing */
  .pricing__points { padding: 16px 18px; }
  .pricing-point__title { font-size: 13px; }
  .pricing-point__title strong { font-size: 15px; }
  .plan { padding: 28px 24px; border-radius: 16px; }
  .plan__name { font-size: 22px; margin-bottom: 16px; }
  .plan__badge { top: 18px; right: 18px; font-size: 10px; }
  .plan__price-main { font-size: 36px; }
  .plan__price-note { font-size: 13px; }
  .plan__list li { font-size: 14px; padding-left: 22px; }
  .plan__note { font-size: 13px; margin-bottom: 22px; }

  /* Process steps: 矢印スペース不要 */
  .step { padding: 24px 18px 22px; }
  .step__num { font-size: 32px; }
  .step__icon { width: 40px; height: 40px; }

  /* FAQ */
  .faq__question { font-size: 15px; padding: 20px 0; gap: 12px; }
  .faq__answer-inner { font-size: 14px; padding-bottom: 22px; }
  .faq__item.is-open .faq__answer { max-height: 600px; }

  /* Company */
  .company__info { padding: 20px 0 4px; }
  .company__info > div { grid-template-columns: 96px 1fr; gap: 12px; }
  .company__info dt { font-size: 10px; }
  .company__info dd { font-size: 13px; }

  /* Final CTA */
  .final-cta h2 { font-size: clamp(1.75rem, 7vw, 2.5rem); }
  .final-cta__lead { font-size: 14px; margin-bottom: 32px; }
  .final-cta__actions { flex-direction: column; align-items: stretch; }
  .final-cta__actions .btn { width: 100%; justify-content: center; }
  .final-cta__stats { padding: 20px 14px; gap: 20px 12px; }
  .final-cta__stat-num { font-size: 28px; }
  .final-cta__stat-label { font-size: 11px; }
  .final-cta__contact-email { font-size: 17px; word-break: break-all; }

  /* Footer */
  .site-footer { padding: 56px 0 32px; }
  .site-footer__grid { gap: 32px; padding-bottom: 32px; }
  .footer-col__title { margin-bottom: 14px; }
  .footer-col ul { gap: 10px; }
  .footer-col a { font-size: 14px; }
}

/* ========== 〜480px 小型スマホ (iPhone SE 〜 iPhone 14) ========== */
@media (max-width: 480px) {
  .container { padding: 0 18px; }

  /* Hero: 写真の縦伸び抑制 */
  .hero__title { font-size: clamp(1.6rem, 8vw, 2rem); }
  .hero__lead { font-size: 0.9rem; }
  .hero__visual { max-width: 360px; }

  /* Cases: 1枚ずつ snap */
  .cases__carousel { margin: 0 -18px; }
  .cases__track { padding: 8px 18px 28px; gap: 14px; }
  .case-card { width: calc(92% - 4px); }
  .cases__controls { padding: 0 18px; }
  .cases__btn { width: 40px; height: 40px; }

  /* Pricing plan fully comfortable */
  .plan { padding: 24px 20px; }
  .plan__price-main { font-size: 32px; }

  /* Section heading smaller */
  h2 { font-size: clamp(1.75rem, 7.5vw, 2.25rem); }

  /* Stats 2x2 but ensure label fits */
  .hero__stats { grid-template-columns: repeat(2, 1fr); gap: 18px 10px; }
  .stat__label { font-size: 12px; }

  /* Company info labels narrower */
  .company__info > div { grid-template-columns: 84px 1fr; }

  /* Pricing points icon+text gap */
  .pricing-point { gap: 10px; }
  .pricing-point__icon { width: 28px; height: 28px; }

  /* Index nav watermark smaller */
  .index-nav__watermark { font-size: clamp(1.75rem, 8vw, 2.75rem); }

  /* Process: 矢印は既に非表示・padding詰め */
  .step { padding: 22px 16px 20px; }
}

/* ========== 〜380px 極小 (iPhone SE 375px) 追加保険 ========== */
@media (max-width: 380px) {
  .container { padding: 0 16px; }
  .site-header__logo img { height: 96px; margin: -22px 0; }
  .site-header__actions .btn { padding: 9px 12px; font-size: 12px; }
  .site-header__login { padding: 8px 10px; font-size: 13px; }
  .hero__title { font-size: 1.5rem; }
  .plan { padding: 22px 18px; }
  .plan__price-main { font-size: 28px; }
  .final-cta__contact-email { font-size: 15px; }
  .course-row__ja { font-size: 1.6rem; }
}

/* =========================================================
   Mobile micro-adjustments (2026-04-14)
   Hero改行・イラスト縮小・見出し1行化・Preview横スクロール
   ========================================================= */

/* .sp-br ユーティリティ — PCでは非表示、モバイルでは改行 */
.sp-br { display: none; }
@media (max-width: 767.98px) {
  .sp-br { display: inline; }
}

@media (max-width: 767.98px) {
  /* 1. ヒーロータイトルの改行（sp-brは表示したい） */
  .hero__title br:not(.sp-br) { display: none; }
  .hero__title br.sp-br { display: inline; }

  /* 2. ヒーローイラストを少し小さく */
  .hero__visual { max-width: 320px; width: 85%; }
  .hero__visual-img { max-width: 100%; }

  /* 3. 「こんな状況、ありませんか？」を1行に */
  .challenges .section-header h2 {
    font-size: clamp(1.25rem, 5.4vw, 1.75rem);
    letter-spacing: -0.02em;
    white-space: nowrap;
    line-height: 1.35;
  }

  /* 4. Coursesセクションの見出し — sp-brで改行保持 */
  #courses .section-header h2 {
    font-size: clamp(1.4rem, 6vw, 1.9rem);
    letter-spacing: -0.015em;
    line-height: 1.4;
  }
  #courses .section-header h2 br:not(.sp-br) { display: none; }

  /* 5. Preview セクションを横スクロールに */
  .preview__scroll {
    display: flex !important;
    flex-wrap: nowrap;
    overflow-x: auto;
    gap: 16px;
    padding-bottom: 16px;
    margin: 0 -20px;
    padding-left: 20px;
    padding-right: 20px;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
  }
  .preview__scroll::-webkit-scrollbar { height: 6px; }
  .preview__scroll::-webkit-scrollbar-thumb {
    background: rgba(0,0,0,0.15);
    border-radius: 3px;
  }
  .preview__scroll > .course-card {
    flex: 0 0 auto;
    min-width: 280px;
    width: 280px;
    scroll-snap-align: start;
  }

  /* 6. Platform 見出しを1行に */
  .platform__title {
    font-size: clamp(1.3rem, 5.6vw, 1.8rem);
    letter-spacing: -0.02em;
    white-space: nowrap;
    line-height: 1.3;
  }
  .platform__title br { display: none; }

  /* "AIチューターがまるごと理解" 等のdesc内brを解除して自然折返し */
  .platform__desc br { display: none; }
}

@media (max-width: 480px) {
  /* さらに小さい画面向け微調整 */
  .hero__visual { max-width: 280px; }
  .challenges .section-header h2 {
    font-size: clamp(1.15rem, 5.2vw, 1.5rem);
  }
  .platform__title {
    font-size: clamp(1.15rem, 5.2vw, 1.6rem);
  }
}

@media (max-width: 380px) {
  .hero__visual { max-width: 240px; }
  .challenges .section-header h2 { font-size: 1.05rem; }
  .platform__title { font-size: 1.1rem; }
}