/* ==========================================================================
   beside Global | Official English Landing Page Stylesheet
   Theme: Japanese × Modern × Clean × Creative × Premium Studio
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:ital,wght@0,400;0,500;0,600;0,700;0,800;1,700&family=Noto+Sans+JP:wght@400;500;700;900&display=swap');

:root {
  --color-orange: #E07A5F;
  --color-orange-dark: #CC664B;
  --color-orange-light: #FFF5F2;
  --color-orange-border: #FAD9D0;
  
  --color-dark: #0F172A;
  --color-dark-sub: #1E293B;
  --color-text-main: #334155;
  --color-text-sub: #64748B;
  --color-text-muted: #94A3B8;
  
  --color-bg-light: #F8FAFC;
  --color-bg-subtle: #F1F5F9;
  --color-white: #FFFFFF;
  --color-border: #E2E8F0;
  --color-border-dark: #CBD5E1;
  
  --color-green: #10B981;
  --color-blue: #3B82F6;
  
  --font-en: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-jp: 'Noto Sans JP', sans-serif;
  
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 16px 40px rgba(15, 23, 42, 0.09);
  --shadow-orange: 0 8px 25px rgba(224, 122, 95, 0.28);
  
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  
  --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-en);
  color: var(--color-text-main);
  background-color: var(--color-white);
  line-height: 1.65;
  letter-spacing: -0.01em;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

ul {
  list-style: none;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.container-narrow {
  max-width: 900px;
}

/* ==========================================================================
   Typography & Badges
   ========================================================================== */
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-en);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-orange-dark);
  background-color: var(--color-orange-light);
  border: 1px solid var(--color-orange-border);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  margin-bottom: 16px;
}

.section-heading {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-dark);
  line-height: 1.25;
  letter-spacing: -0.025em;
  margin-bottom: 16px;
}

.section-lead {
  font-size: 1.125rem;
  color: var(--color-text-sub);
  max-width: 720px;
  margin: 0 auto 48px auto;
  line-height: 1.7;
}

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

.highlight-orange {
  color: var(--color-orange-dark);
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-en);
  font-size: 0.98rem;
  font-weight: 700;
  padding: 14px 28px;
  border-radius: var(--radius-full);
  cursor: pointer;
  border: none;
  transition: var(--transition);
  text-align: center;
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--color-orange);
  color: var(--color-white);
  box-shadow: var(--shadow-orange);
}

.btn-primary:hover {
  background-color: var(--color-orange-dark);
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(224, 122, 95, 0.38);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-dark);
  border: 1.5px solid var(--color-border-dark);
}

.btn-outline:hover {
  border-color: var(--color-dark);
  background-color: var(--color-dark);
  color: var(--color-white);
  transform: translateY(-2px);
}

.btn-white {
  background-color: var(--color-white);
  color: var(--color-dark);
  box-shadow: var(--shadow-md);
}

.btn-white:hover {
  background-color: var(--color-bg-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-sm {
  font-size: 0.88rem;
  padding: 8px 18px;
}

.btn-lg {
  font-size: 1.1rem;
  padding: 18px 38px;
}

/* ==========================================================================
   1. Header & Navigation (PC 1-line flex layout & Mobile Drawer)
   ========================================================================== */
#site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  transition: var(--transition);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
  gap: 16px;
}

.header-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  flex-shrink: 0;
}

.header-logo-img {
  height: 44px;
  width: auto;
  max-width: 160px;
  object-fit: contain;
  display: block;
  transition: var(--transition);
}

.header-logo:hover .header-logo-img {
  opacity: 0.85;
}

.header-studio-tag {
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--color-text-sub);
  border-left: 1.5px solid var(--color-border-dark);
  padding-left: 10px;
  line-height: 1.2;
  white-space: nowrap;
}

@media (max-width: 1280px) {
  .header-studio-tag {
    display: none;
  }
}

#site-nav {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

#site-nav ul {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

#site-nav a {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-text-main);
  white-space: nowrap;
  transition: var(--transition);
}

#site-nav a:hover {
  color: var(--color-orange-dark);
}

.nav-lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.8rem !important;
  font-weight: 700 !important;
  color: var(--color-dark) !important;
  background: var(--color-bg-subtle);
  padding: 5px 11px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  white-space: nowrap;
}

.nav-lang-switch:hover {
  border-color: var(--color-orange);
  color: var(--color-orange) !important;
}

.nav-cta {
  background: var(--color-orange);
  color: var(--color-white) !important;
  padding: 7px 16px;
  border-radius: var(--radius-full);
  font-weight: 700 !important;
  font-size: 0.86rem !important;
  box-shadow: 0 3px 10px rgba(224, 122, 95, 0.25);
  white-space: nowrap;
}

.nav-cta:hover {
  background: var(--color-orange-dark);
  transform: translateY(-1px);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  flex-direction: column;
  gap: 5px;
  z-index: 1001;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-dark);
  border-radius: 2px;
  transition: var(--transition);
}

/* ==========================================================================
   2. Hero Section
   ========================================================================== */
.hero-section {
  padding: 150px 0 80px 0;
  background: radial-gradient(circle at 50% 0%, rgba(224, 122, 95, 0.08) 0%, rgba(255, 255, 255, 0) 70%), var(--color-white);
  position: relative;
  overflow: hidden;
}

.hero-content {
  text-align: center;
  max-width: 880px;
  margin: 0 auto;
}

.hero-logo-display {
  display: flex;
  justify-content: center;
  margin-bottom: 24px;
}

.hero-brand-logo {
  height: 96px;
  width: auto;
  max-width: 320px;
  object-fit: contain;
  display: block;
  transition: var(--transition);
}

.hero-title-main {
  font-size: 4rem;
  font-weight: 800;
  color: var(--color-dark);
  line-height: 1.12;
  letter-spacing: -0.035em;
  margin-bottom: 18px;
}

.hero-sub-desc {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-dark);
  line-height: 1.5;
  margin-bottom: 20px;
}

.hero-tagline-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  font-weight: 800;
  color: var(--color-dark);
  background: var(--color-bg-light);
  border: 1px solid var(--color-border);
  padding: 8px 20px;
  border-radius: var(--radius-full);
  margin-bottom: 36px;
  box-shadow: var(--shadow-sm);
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

/* ==========================================================================
   3. 3 USP Cards (Hero直下 実績・信頼性)
   ========================================================================== */
.usp-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 20px;
}

.usp-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  gap: 18px;
  text-align: left;
  transition: var(--transition);
}

.usp-card:hover {
  border-color: var(--color-orange-border);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.usp-stat-huge {
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--color-orange);
  line-height: 1;
  letter-spacing: -0.03em;
  flex-shrink: 0;
}

.usp-title {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--color-dark);
  margin-bottom: 4px;
}

.usp-desc {
  font-size: 0.88rem;
  color: var(--color-text-sub);
  line-height: 1.5;
}

/* ==========================================================================
   4. What We Do
   ========================================================================== */
.what-we-do-section {
  padding: 100px 0;
  background-color: var(--color-bg-light);
  border-top: 1px solid var(--color-border);
}

.what-we-do-box {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 56px 48px;
  box-shadow: var(--shadow-md);
  text-align: center;
  max-width: 960px;
  margin: 0 auto;
}

.flow-diagram-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin: 40px 0 24px 0;
  flex-wrap: wrap;
}

.flow-step-pill {
  background: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--color-dark);
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 180px;
}

.flow-step-pill.featured {
  background: var(--color-orange-light);
  border-color: var(--color-orange-border);
  color: var(--color-orange-dark);
}

.flow-step-num {
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-sub);
}

.flow-arrow {
  color: var(--color-orange);
  font-size: 1.5rem;
  font-weight: 800;
}

/* ==========================================================================
   5. What Can You Send Us?
   ========================================================================== */
.what-to-send-section {
  padding: 100px 0;
  background: var(--color-white);
  border-top: 1px solid var(--color-border);
}

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

.material-card {
  background: var(--color-bg-light);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.material-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-orange-border);
  background: var(--color-white);
}

.material-card-icon {
  font-size: 2.2rem;
  margin-bottom: 16px;
}

.material-card-title {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--color-dark);
  margin-bottom: 12px;
}

.material-card-desc {
  font-size: 0.92rem;
  color: var(--color-text-main);
  line-height: 1.6;
}

.material-limit-note {
  margin-top: 36px;
  text-align: center;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text-sub);
  background: var(--color-bg-subtle);
  display: inline-block;
  padding: 10px 24px;
  border-radius: var(--radius-full);
}

/* ==========================================================================
   6. AI Song Production (Featured Entry $249)
   ========================================================================== */
.ai-song-featured-section {
  padding: 110px 0;
  background: linear-gradient(180deg, var(--color-orange-light) 0%, var(--color-white) 100%);
  border-top: 1px solid var(--color-orange-border);
}

.ai-featured-box {
  background: var(--color-white);
  border: 2px solid var(--color-orange);
  border-radius: var(--radius-xl);
  padding: 56px 48px;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

.ai-featured-badge-top {
  position: absolute;
  top: 0;
  right: 0;
  background: var(--color-orange);
  color: var(--color-white);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  padding: 8px 24px;
  border-bottom-left-radius: var(--radius-md);
  text-transform: uppercase;
}

.ai-featured-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 32px;
  margin-bottom: 36px;
  flex-wrap: wrap;
  gap: 20px;
}

.ai-price-huge {
  font-size: 3.5rem;
  font-weight: 900;
  color: var(--color-dark);
  line-height: 1;
  letter-spacing: -0.03em;
}

.ai-price-huge span {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text-sub);
}

.ai-included-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px 32px;
  margin-bottom: 40px;
}

.ai-included-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--color-dark);
}

.ai-included-item .check-icon {
  color: var(--color-orange);
  font-weight: 900;
  font-size: 1.1rem;
  flex-shrink: 0;
}

/* 7. A/B -> C/D Workflow Box */
.concept-flow-container {
  background: var(--color-bg-light);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  margin-top: 36px;
}

.concept-flow-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--color-dark);
  margin-bottom: 8px;
}

.concept-flow-desc {
  font-size: 0.92rem;
  color: var(--color-text-sub);
  margin-bottom: 24px;
  line-height: 1.6;
}

.concept-steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  position: relative;
}

.concept-step-item {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px 16px;
  text-align: center;
  position: relative;
}

.concept-step-num {
  font-size: 0.72rem;
  font-weight: 800;
  color: var(--color-orange-dark);
  text-transform: uppercase;
  margin-bottom: 6px;
}

.concept-step-name {
  font-size: 0.92rem;
  font-weight: 800;
  color: var(--color-dark);
  margin-bottom: 6px;
}

.concept-step-sub {
  font-size: 0.8rem;
  color: var(--color-text-sub);
  line-height: 1.4;
}

/* ==========================================================================
   8. Human Finishing & 9. J-Pop / Anime Music
   ========================================================================== */
.human-finishing-section {
  padding: 100px 0;
  background-color: var(--color-white);
  border-top: 1px solid var(--color-border);
}

.human-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.genre-tags-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.genre-tag-badge {
  background: var(--color-bg-light);
  border: 1px solid var(--color-border);
  color: var(--color-dark);
  font-size: 0.88rem;
  font-weight: 700;
  padding: 8px 16px;
  border-radius: var(--radius-full);
  transition: var(--transition);
}

.genre-tag-badge:hover {
  background: var(--color-orange-light);
  border-color: var(--color-orange-border);
  color: var(--color-orange-dark);
}

/* ==========================================================================
   10. Selected Works (Portfolio)
   ========================================================================== */
.works-section {
  padding: 100px 0;
  background-color: var(--color-bg-light);
  border-top: 1px solid var(--color-border);
}

.works-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.work-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
}

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

.work-genre-pill {
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  color: var(--color-orange-dark);
  background: var(--color-orange-light);
  padding: 3px 10px;
  border-radius: var(--radius-full);
  display: inline-block;
  margin-bottom: 12px;
}

.work-artist-name {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--color-dark);
  margin-bottom: 4px;
}

.work-song-title {
  font-size: 0.95rem;
  color: var(--color-text-main);
  font-weight: 600;
  margin-bottom: 12px;
}

.work-role-badge {
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--color-text-sub);
  background: var(--color-bg-subtle);
  padding: 4px 10px;
  border-radius: 4px;
  display: inline-block;
  margin-bottom: 18px;
}

.work-listen-links {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.listen-btn {
  font-size: 0.76rem;
  font-weight: 700;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  background: var(--color-white);
  color: var(--color-dark);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.listen-btn:hover {
  border-color: var(--color-dark);
  background: var(--color-dark);
  color: var(--color-white);
}

.listen-btn.apple:hover {
  background: #FC3C44;
  border-color: #FC3C44;
}

.listen-btn.spotify:hover {
  background: #1DB954;
  border-color: #1DB954;
}

.listen-btn.youtube:hover {
  background: #FF0000;
  border-color: #FF0000;
}

/* ==========================================================================
   11. AI Song Production Case Study Visualizer
   ========================================================================== */
.case-study-section {
  padding: 100px 0;
  background-color: var(--color-white);
  border-top: 1px solid var(--color-border);
}

.case-study-box {
  background: var(--color-bg-light);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 48px;
  max-width: 1000px;
  margin: 0 auto;
}

.case-study-flow-row {
  display: grid;
  grid-template-columns: 1fr auto 1.4fr auto 1fr;
  align-items: center;
  gap: 16px;
  margin-top: 36px;
}

.case-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.case-card.highlight {
  border-color: var(--color-orange);
  background: var(--color-orange-light);
}

.case-card-title {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--color-dark);
  margin-bottom: 6px;
}

.case-card-sub {
  font-size: 0.82rem;
  color: var(--color-text-sub);
  line-height: 1.4;
}

/* ==========================================================================
   12. All Services (5 Full Service Lines)
   ========================================================================== */
.services-section {
  padding: 100px 0;
  background-color: var(--color-bg-light);
  border-top: 1px solid var(--color-border);
}

.services-grid-5 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.service-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
}

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

.service-card.featured {
  border: 2px solid var(--color-orange);
  background: var(--color-orange-light);
}

.service-num {
  font-size: 1.25rem;
  font-weight: 900;
  color: var(--color-orange);
  margin-bottom: 8px;
}

.service-card-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--color-dark);
  margin-bottom: 10px;
}

.service-price-tag {
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--color-dark);
  margin-bottom: 16px;
}

.service-price-tag small {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-text-sub);
}

.service-card-desc {
  font-size: 0.92rem;
  color: var(--color-text-main);
  line-height: 1.6;
  margin-bottom: 20px;
}

.service-deliverables {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px dashed var(--color-border);
  font-size: 0.85rem;
  color: var(--color-text-sub);
}

.service-deliverables li {
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* ==========================================================================
   13. Service Comparison Table
   ========================================================================== */
.comparison-section {
  padding: 100px 0;
  background-color: var(--color-white);
  border-top: 1px solid var(--color-border);
}

.table-responsive {
  width: 100%;
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  margin-top: 40px;
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.92rem;
  background: var(--color-white);
}

.comparison-table th,
.comparison-table td {
  padding: 18px 20px;
  border-bottom: 1px solid var(--color-border);
}

.comparison-table th {
  background: var(--color-bg-light);
  color: var(--color-dark);
  font-weight: 800;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.comparison-table tr.highlight-row {
  background: var(--color-orange-light);
}

.comparison-table tr.highlight-row td {
  font-weight: 600;
  color: var(--color-dark);
}

/* ==========================================================================
   14. Why beside? (Stats & Integrated Workflow)
   ========================================================================== */
.why-section {
  padding: 100px 0;
  background: var(--color-dark);
  color: var(--color-white);
}

.why-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.why-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  transition: var(--transition);
}

.why-card:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--color-orange);
  transform: translateY(-4px);
}

.why-stat-num {
  font-size: 3rem;
  font-weight: 900;
  color: var(--color-orange);
  line-height: 1;
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.why-stat-title {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: 8px;
}

.why-stat-desc {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* ==========================================================================
   16. How It Works (6 Steps)
   ========================================================================== */
.how-it-works-section {
  padding: 100px 0;
  background: var(--color-bg-light);
  border-top: 1px solid var(--color-border);
}

.steps-grid-6 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.step-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  box-shadow: var(--shadow-sm);
  position: relative;
}

.step-badge {
  font-size: 0.75rem;
  font-weight: 900;
  color: var(--color-orange-dark);
  background: var(--color-orange-light);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  display: inline-block;
  margin-bottom: 12px;
}

.step-card-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--color-dark);
  margin-bottom: 8px;
}

.step-card-desc {
  font-size: 0.9rem;
  color: var(--color-text-sub);
  line-height: 1.6;
}

/* ==========================================================================
   18. FAQ Section
   ========================================================================== */
.faq-section {
  padding: 100px 0;
  background: var(--color-white);
  border-top: 1px solid var(--color-border);
}

.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: var(--color-bg-light);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}

.faq-item[open] {
  border-color: var(--color-orange-border);
  background: var(--color-white);
  box-shadow: var(--shadow-sm);
}

.faq-item summary {
  padding: 20px 24px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-dark);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

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

.faq-item summary::after {
  content: "+";
  font-size: 1.4rem;
  font-weight: 400;
  color: var(--color-orange);
  transition: transform 0.2s ease;
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-answer {
  padding: 0 24px 22px 24px;
  font-size: 0.95rem;
  color: var(--color-text-main);
  line-height: 1.65;
}

/* ==========================================================================
   19. AI & Rights Notice Box
   ========================================================================== */
.ai-rights-box {
  background: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  max-width: 820px;
  margin: 48px auto 0 auto;
  font-size: 0.88rem;
  color: var(--color-text-sub);
  line-height: 1.6;
}

.ai-rights-title {
  font-size: 0.98rem;
  font-weight: 800;
  color: var(--color-dark);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ==========================================================================
   20. Contact Section & Global Order Form
   ========================================================================== */
.contact-section {
  padding: 100px 0;
  background: var(--color-bg-light);
  border-top: 1px solid var(--color-border);
}

.contact-form-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 56px 48px;
  box-shadow: var(--shadow-md);
  max-width: 800px;
  margin: 0 auto;
  text-align: left;
}

.form-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

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

.form-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 8px;
}

.required-badge {
  font-size: 0.72rem;
  font-weight: 800;
  color: #EF4444;
  background: #FEE2E2;
  padding: 2px 6px;
  border-radius: 4px;
  margin-left: 4px;
}

.form-control {
  width: 100%;
  padding: 14px 18px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: var(--font-en);
  font-size: 0.95rem;
  color: var(--color-dark);
  background: var(--color-white);
  transition: var(--transition);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-orange);
  box-shadow: 0 0 0 3px rgba(224, 122, 95, 0.15);
}

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

.form-submit-wrap {
  text-align: center;
  margin-top: 32px;
}

.form-success-box {
  display: none;
  background: #ECFDF5;
  border: 1px solid #A7F3D0;
  border-radius: var(--radius-lg);
  padding: 32px;
  text-align: center;
  margin-bottom: 24px;
}

.form-success-icon {
  width: 48px;
  height: 48px;
  background: #10B981;
  color: var(--color-white);
  font-size: 1.5rem;
  font-weight: 900;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px auto;
}

.form-success-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: #065F46;
  margin-bottom: 8px;
}

.form-success-desc {
  font-size: 0.95rem;
  color: #047857;
  line-height: 1.6;
}

/* ==========================================================================
   21. Final CTA Section
   ========================================================================== */
.final-cta-section {
  padding: 110px 0;
  background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-dark-sub) 100%);
  color: var(--color-white);
  text-align: center;
}

.final-cta-content {
  max-width: 800px;
  margin: 0 auto;
}

.final-cta-title {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -0.03em;
}

.final-cta-lead {
  font-size: 1.2rem;
  color: var(--color-text-muted);
  margin-bottom: 40px;
}

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

/* ==========================================================================
   22. Footer
   ========================================================================== */
#site-footer {
  background: var(--color-dark);
  color: var(--color-text-muted);
  padding: 70px 0 40px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 0.9rem;
}

.footer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  flex-wrap: wrap;
  gap: 24px;
}

.footer-logo img {
  height: 36px;
  width: auto;
}

.footer-nav-links {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-nav-links a:hover {
  color: var(--color-white);
}

.footer-bottom {
  padding-top: 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-sns-links {
  display: flex;
  gap: 16px;
}

.footer-sns-links a {
  color: var(--color-text-muted);
  font-weight: 600;
}

.footer-sns-links a:hover {
  color: var(--color-orange);
}

/* ==========================================================================
   Responsive / Mobile First Overrides
   ========================================================================== */
@media (max-width: 1180px) {
  .menu-toggle { display: flex; }
  
  #site-nav {
    position: fixed;
    top: 80px;
    left: 0;
    width: 100%;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    padding: 24px;
    box-shadow: var(--shadow-lg);
    display: none;
    max-height: calc(100vh - 80px);
    overflow-y: auto;
  }
  
  #site-nav.open {
    display: block;
  }
  
  #site-nav ul {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }
  
  #site-nav a {
    font-size: 1rem;
  }
}

@media (max-width: 992px) {
  .hero-title-main { font-size: 3.2rem; }
  .usp-grid-3 { grid-template-columns: 1fr; }
  .material-cards-grid { grid-template-columns: 1fr; }
  .works-grid { grid-template-columns: repeat(2, 1fr); }
  .services-grid-5 { grid-template-columns: 1fr; }
  .why-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-grid-6 { grid-template-columns: repeat(2, 1fr); }
  .concept-steps-grid { grid-template-columns: repeat(2, 1fr); }
  .case-study-flow-row { grid-template-columns: 1fr; }
  .case-study-arrow { display: none; }
  .human-grid-2 { grid-template-columns: 1fr; gap: 32px; }
}

@media (max-width: 768px) {
  .header-inner {
    height: 68px;
  }
  
  .header-logo-img {
    height: 38px;
    max-width: 140px;
  }
  
  #site-nav {
    top: 68px;
  }
  
  .hero-brand-logo {
    height: 64px;
    max-width: 220px;
  }
  
  .hero-title-main { font-size: 2.5rem; }
  .hero-sub-desc { font-size: 1.05rem; }
  
  .ai-featured-box { padding: 36px 24px; }
  .ai-price-huge { font-size: 2.8rem; }
  .ai-included-grid { grid-template-columns: 1fr; }
  
  .works-grid { grid-template-columns: 1fr; }
  .why-grid { grid-template-columns: 1fr; }
  .steps-grid-6 { grid-template-columns: 1fr; }
  .concept-steps-grid { grid-template-columns: 1fr; }
  
  .form-grid-2 { grid-template-columns: 1fr; }
  .contact-form-card { padding: 36px 24px; }
  
  .final-cta-title { font-size: 2.2rem; }
  
  .footer-top { flex-direction: column; align-items: flex-start; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}