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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans, "Noto Sans JP", sans-serif);
  background: var(--body-bg, #F8F5EF);
  color: var(--body-text, #1A1A2E);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

:root {
  --navy: #0D1F3C;
  --navy-mid: #162845;
  --navy-lite: #1E3560;
  --gold: #B8973E;
  --gold-lite: #D4AF55;
  --cream: #F8F5EF;
  --white: #FFFFFF;
  --text: #1A1A2E;
  --text-mid: #3D4466;
  --text-lite: #6B7399;
  --green: #2A6644;
  --green-bg: #EAF2ED;
  --blue: #1A4A7A;
  --blue-bg: #EBF1F8;
  --teal: #1A5F6A;
  --teal-bg: #E8F3F5;
  --radius-sm: 6px;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 4px 24px rgba(13, 31, 60, 0.10);
  --shadow-lg: 0 12px 48px rgba(13, 31, 60, 0.18);
  --font-sans: 'Noto Sans JP', sans-serif;
  --font-serif: 'Noto Serif JP', serif;
  --body-bg: var(--cream);
  --body-text: var(--text);
}

.fade-up {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-up.visible {
  opacity: 1;
  transform: none;
}
.fade-up:nth-child(2) {
  transition-delay: 0.08s;
}
.fade-up:nth-child(3) {
  transition-delay: 0.16s;
}
.fade-up:nth-child(4) {
  transition-delay: 0.24s;
}
.fade-up:nth-child(5) {
  transition-delay: 0.28s;
}
.fade-up:nth-child(6) {
  transition-delay: 0.35s;
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.5;
    transform: scale(0.8);
  }
}
@keyframes blink {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.3;
  }
}
section {
  padding: 72px 32px;
}
@media (max-width: 640px) {
  section {
    padding: 52px 20px;
  }
}

.section-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.site-header {
  background: #fff;
  padding: 0 32px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.08);
  border-bottom: 1px solid #e5e5e5;
}
@media (max-width: 640px) {
  .site-header {
    padding: 0 20px;
  }
}

.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.site-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.logo-img {
  height: 40px;
  width: auto;
  display: block;
  object-fit: contain;
}

.logo-company {
  font-size: 1.6rem;
  font-weight: 700;
  color: #333;
  margin-left: 10px;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}
@media (max-width: 640px) {
  .header-nav {
    display: none;
  }
}
.header-nav a {
  color: #555;
  text-decoration: none;
  font-size: 0.82rem;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: all 0.2s;
  white-space: nowrap;
}
.header-nav a:hover {
  color: var(--navy);
  background: rgba(0, 0, 0, 0.04);
}
.header-nav .btn-contact {
  background: var(--navy);
  color: #fff;
  font-weight: 500;
  padding: 7px 16px;
}
.header-nav .btn-contact:hover {
  background: var(--navy-dark, #1a2a4a);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 6px;
}
@media (max-width: 640px) {
  .hamburger {
    display: flex;
  }
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: #555;
  border-radius: 2px;
  transition: all 0.3s;
}

.mobile-nav {
  display: none;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  bottom: 0;
  background: #fff;
  flex-direction: column;
  padding: 16px 24px;
  gap: 0;
  z-index: 99;
  overflow-y: auto;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}
.mobile-nav.open {
  display: flex;
}
.mobile-nav a {
  color: #333;
  text-decoration: none;
  font-size: 1rem;
  padding: 14px 16px;
  border-bottom: 1px solid #eee;
}
.mobile-nav a:hover {
  background: #f5f5f5;
}

.sub-nav {
  background: var(--navy);
  padding: 0 32px;
}
@media (max-width: 640px) {
  .sub-nav {
    padding: 0 16px;
  }
}

.sub-nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 4px;
  height: 40px;
  overflow-x: auto;
}
.sub-nav-inner a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  font-size: 0.78rem;
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  transition: all 0.2s;
  white-space: nowrap;
}
.sub-nav-inner a:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.12);
}

.site-footer {
  background: #060F1E;
  padding: 48px 32px 32px;
  color: rgba(255, 255, 255, 0.45);
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.footer-top {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 48px;
  margin-bottom: 36px;
  padding-bottom: 36px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  align-items: start;
}
@media (max-width: 640px) {
  .footer-top {
    grid-template-columns: 1fr;
    gap: 24px;
  }
}

.footer-logo-link {
  display: flex;
  align-items: center;
  text-decoration: none;
}

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

.footer-company {
  font-size: 1.1rem;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.85);
  margin-left: 10px;
}

.footer-tagline {
  font-size: 0.7rem;
  color: var(--gold-lite);
  margin-top: 6px;
}

.footer-desc {
  font-size: 0.78rem;
  line-height: 1.75;
  margin-top: 14px;
  max-width: 380px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: flex-end;
}
@media (max-width: 640px) {
  .footer-links {
    align-items: flex-start;
  }
}
.footer-links a {
  font-size: 0.78rem;
  color: rgba(255, 255, 255, 0.45);
  text-decoration: none;
  transition: color 0.2s;
}
.footer-links a:hover {
  color: rgba(255, 255, 255, 0.8);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.72rem;
  flex-wrap: wrap;
  gap: 8px;
}
.footer-bottom a {
  color: rgba(255, 255, 255, 0.35);
  text-decoration: none;
}
.footer-bottom a:hover {
  color: rgba(255, 255, 255, 0.65);
}

:root {
  --gold-pale: #F7F0DC;
  --gold-soft: #EDE0B8;
  --warm-gray: #F4F2EE;
  --rule: #E2DDD4;
  --red-accent: #C0392B;
  --serif: 'Noto Serif JP', serif;
  --sans: 'Noto Sans JP', sans-serif;
  --r-sm: 6px;
  --r: 10px;
  --r-lg: 16px;
  --r-xl: 22px;
  --sh: 0 2px 16px rgba(11,30,58,.08);
  --sh-lg: 0 8px 40px rgba(11,30,58,.14);
}

.hero {
  background: var(--navy);
  padding: 80px 32px 72px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 900px 600px at 110% 60%, rgba(184, 151, 62, 0.1) 0%, transparent 55%), radial-gradient(ellipse 500px 700px at -5% 20%, rgba(28, 59, 110, 0.6) 0%, transparent 55%);
  pointer-events: none;
}
.hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(184, 151, 62, 0.4), transparent);
}
.hero h1 {
  font-family: var(--serif);
  font-size: clamp(1.7rem, 3.2vw, 2.6rem);
  font-weight: 700;
  color: var(--white);
  line-height: 1.45;
  margin-bottom: 24px;
  letter-spacing: 0.03em;
}
.hero h1 .gold {
  color: var(--gold-lite);
}

.hero-inner {
  max-width: 1080px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 400px;
  gap: 64px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 24px;
}

.eyebrow-line {
  width: 28px;
  height: 2px;
  background: var(--gold);
}

.eyebrow-text {
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--gold-lite);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hero-desc {
  font-size: 0.93rem;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.9;
  max-width: 500px;
  margin-bottom: 36px;
}

.hero-ctas {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn-gold {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--gold);
  color: var(--white);
  font-family: var(--sans);
  font-weight: 700;
  font-size: 0.9rem;
  padding: 14px 28px;
  border-radius: var(--r-sm);
  text-decoration: none;
  box-shadow: 0 4px 20px rgba(184, 151, 62, 0.35);
  transition: all 0.2s;
  white-space: nowrap;
}
.btn-gold:hover {
  background: var(--gold-lite);
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(184, 151, 62, 0.4);
}

.btn-outline-white {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: rgba(255, 255, 255, 0.85);
  font-family: var(--sans);
  font-weight: 500;
  font-size: 0.9rem;
  padding: 13px 28px;
  border-radius: var(--r-sm);
  border: 1px solid rgba(255, 255, 255, 0.3);
  text-decoration: none;
  transition: all 0.2s;
  white-space: nowrap;
}
.btn-outline-white:hover {
  border-color: rgba(255, 255, 255, 0.7);
  background: rgba(255, 255, 255, 0.07);
}

.hero-books {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: -20px;
  position: relative;
}

.hero-book {
  border-radius: 4px;
  box-shadow: 8px 12px 36px rgba(0, 0, 0, 0.45);
  object-fit: cover;
  transition: transform 0.3s;
}
.hero-book:hover {
  transform: translateY(-8px);
}

.hero-book-1 {
  width: 145px;
  z-index: 3;
  transform: rotate(-3deg);
}

.hero-book-2 {
  width: 125px;
  z-index: 2;
  transform: rotate(2deg) translateY(10px);
  margin-left: -30px;
}

.hero-book-3 {
  width: 105px;
  z-index: 1;
  transform: rotate(5deg) translateY(20px);
  margin-left: -28px;
  opacity: 0.85;
}

section {
  padding: 72px 32px;
}

.section-inner {
  max-width: 1080px;
  margin: 0 auto;
}

.sec-eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}
.sec-eyebrow .line {
  width: 20px;
  height: 2px;
  background: var(--gold);
}
.sec-eyebrow .text {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold);
}

.sec-title {
  font-family: var(--serif);
  font-size: clamp(1.45rem, 2.8vw, 2rem);
  font-weight: 700;
  color: var(--navy);
  line-height: 1.45;
  margin-bottom: 12px;
}

.sec-sub {
  font-size: 0.9rem;
  color: var(--text-mid);
  line-height: 1.85;
  margin-bottom: 48px;
  max-width: 640px;
}

.target-bar {
  background: var(--warm-gray);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  padding: 28px 32px;
}

.target-bar-inner {
  max-width: 1080px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.target-label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--text-lite);
  white-space: nowrap;
  text-transform: uppercase;
  margin-right: 6px;
}

.target-chip {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--white);
  border: 1px solid var(--rule);
  padding: 7px 14px;
  border-radius: 100px;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-mid);
  white-space: nowrap;
}
.target-chip .icon {
  font-size: 0.9rem;
}

.author-section {
  background: var(--white);
}

.author-card {
  border: 1px solid var(--rule);
  border-radius: var(--r-xl);
  overflow: hidden;
  display: grid;
  grid-template-columns: 6px 1fr;
  box-shadow: var(--sh);
}

.author-card-accent {
  background: linear-gradient(180deg, var(--gold) 0%, var(--navy) 100%);
}

.author-card-body {
  padding: 44px 48px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.author-item {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.author-item + .author-item {
  border-left: 1px solid var(--rule);
  padding-left: 48px;
}

.author-role {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold);
}

.author-name {
  font-family: var(--serif);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--navy);
  letter-spacing: 0.04em;
}

.author-name-en {
  font-size: 0.72rem;
  color: var(--text-lite);
  letter-spacing: 0.1em;
  margin-top: -10px;
}

.author-career {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.career-item {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  font-size: 0.82rem;
  color: var(--text-mid);
  line-height: 1.55;
}
.career-item::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--gold);
  flex-shrink: 0;
  margin-top: 6px;
}

.author-books {
  padding: 16px 18px;
  background: var(--warm-gray);
  border-radius: var(--r);
  font-size: 0.75rem;
  color: var(--text-mid);
  line-height: 1.7;
}
.author-books strong {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-lite);
  display: block;
  margin-bottom: 7px;
}

.books-section {
  background: var(--cream);
}

.tabs {
  display: flex;
  gap: 2px;
  margin-bottom: 40px;
  border-bottom: 2px solid var(--rule);
}

.tab-btn {
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--sans);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-lite);
  padding: 12px 24px;
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  transition: all 0.2s;
  white-space: nowrap;
}
.tab-btn.active {
  color: var(--navy);
  border-bottom-color: var(--gold);
}
.tab-btn:hover {
  color: var(--navy);
}

.tab-pane {
  display: none;
}
.tab-pane.active {
  display: block;
}

.book-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.book-card {
  background: var(--white);
  border: 1px solid var(--rule);
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: var(--sh);
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.book-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 48px rgba(0, 0, 0, 0.15);
}

.book-card-img {
  background: linear-gradient(145deg, var(--warm-gray), #EAE8E2);
  padding: 24px 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 180px;
  position: relative;
}

.book-cover {
  width: 100px;
  height: auto;
  border-radius: 3px;
  box-shadow: 4px 6px 16px rgba(0, 0, 0, 0.2);
}

.book-new-tag,
.book-old-tag {
  position: absolute;
  top: 10px;
  left: 10px;
  color: var(--white);
  font-size: 0.6rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 3px;
  letter-spacing: 0.05em;
}

.book-new-tag {
  background: var(--red-accent);
}

.book-old-tag {
  background: #888;
}

.book-new-badge {
  position: absolute;
  top: 10px;
  right: 10px;
  background: #e67e22;
  color: var(--white);
  font-size: 0.55rem;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 3px;
  letter-spacing: 0.05em;
}

.book-card-body {
  padding: 18px 18px 14px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.book-law-tag {
  display: inline-flex;
  align-items: center;
  background: var(--gold-pale);
  color: var(--gold);
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 3px 9px;
  border-radius: 3px;
  width: fit-content;
}

.book-title {
  font-family: var(--serif);
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--navy);
  line-height: 1.5;
}

.book-meta {
  font-size: 0.72rem;
  color: var(--text-lite);
  line-height: 1.6;
}

.book-price {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-top: 4px;
}

.price-val {
  font-family: var(--serif);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--navy);
}

.price-unit {
  font-size: 0.72rem;
  color: var(--text-lite);
}

.book-card-footer {
  padding: 12px 18px 18px;
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.btn-book-detail {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: var(--navy);
  color: var(--white);
  font-size: 0.78rem;
  font-weight: 700;
  padding: 10px 14px;
  border-radius: var(--r-sm);
  text-decoration: none;
  transition: background 0.2s;
}
.btn-book-detail:hover {
  background: var(--navy-lite);
}

.btn-book-amazon {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: var(--warm-gray);
  color: var(--text-mid);
  font-size: 0.72rem;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: var(--r-sm);
  text-decoration: none;
  transition: background 0.2s;
  border: 1px solid var(--rule);
  cursor: pointer;
}
.btn-book-amazon:hover {
  background: #FFF3E0;
  border-color: #FF9900;
  color: #B26A00;
}

.chikujo-card {
  background: var(--white);
  border: 1px solid var(--rule);
  border-radius: var(--r-xl);
  overflow: hidden;
  box-shadow: var(--sh-lg);
  display: grid;
  grid-template-columns: 320px 1fr;
}

.chikujo-card-left {
  background: linear-gradient(160deg, #F0EDE4, #E6E0D0);
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 20px;
}

.chikujo-cover {
  width: 140px;
  height: auto;
  border-radius: 4px;
  box-shadow: 6px 10px 32px rgba(0, 0, 0, 0.25);
}

.chikujo-price-block {
  text-align: center;
}

.chikujo-price {
  font-family: var(--serif);
  font-size: 2rem;
  font-weight: 700;
  color: var(--navy);
  line-height: 1;
}

.chikujo-price-tax {
  font-size: 0.75rem;
  color: var(--text-lite);
  margin-top: 4px;
}

.chikujo-card-right {
  padding: 40px 44px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  justify-content: center;
}

.chikujo-badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  background: var(--gold-pale);
  border: 1px solid var(--gold-soft);
  padding: 6px 14px;
  border-radius: 3px;
  width: fit-content;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--gold);
  text-transform: uppercase;
}

.chikujo-title {
  font-family: var(--serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--navy);
  line-height: 1.4;
}

.chikujo-desc {
  font-size: 0.88rem;
  color: var(--text-mid);
  line-height: 1.85;
}

.chikujo-specs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.spec-chip {
  font-size: 0.72rem;
  color: var(--text-mid);
  background: var(--warm-gray);
  border: 1px solid var(--rule);
  padding: 4px 12px;
  border-radius: 3px;
}

.chikujo-btns {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 4px;
}

.law-nav-section {
  background: var(--navy);
}
.law-nav-section .sec-title {
  color: var(--white);
}
.law-nav-section .sec-eyebrow .text {
  color: var(--gold-lite);
}
.law-nav-section .sec-eyebrow .line {
  background: var(--gold-lite);
}

.law-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2px;
}

.law-item {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.07);
  padding: 28px 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: background 0.2s;
  cursor: default;
}
.law-item:hover {
  background: rgba(255, 255, 255, 0.08);
}
.law-item:first-child {
  border-radius: var(--r-lg) 0 0 var(--r-lg);
}
.law-item:last-child {
  border-radius: 0 var(--r-lg) var(--r-lg) 0;
}

.law-icon {
  font-size: 1.6rem;
}

.law-name {
  font-family: var(--serif);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--white);
  line-height: 1.4;
}

.law-note {
  font-size: 0.74rem;
  color: rgba(255, 255, 255, 0.45);
  line-height: 1.6;
}

.law-books-count {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--gold-lite);
  margin-top: 4px;
}

.b2b-section {
  background: var(--warm-gray);
  border-top: 1px solid var(--rule);
}

.b2b-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 40px;
}

.b2b-card {
  background: var(--white);
  border: 1px solid var(--rule);
  border-radius: var(--r-lg);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  box-shadow: var(--sh);
}

.b2b-icon-wrap {
  width: 52px;
  height: 52px;
  background: var(--gold-pale);
  border-radius: var(--r);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.b2b-title {
  font-family: var(--serif);
  font-size: 1rem;
  font-weight: 700;
  color: var(--navy);
  line-height: 1.4;
}

.b2b-desc {
  font-size: 0.82rem;
  color: var(--text-mid);
  line-height: 1.75;
  flex: 1;
}

.b2b-action {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--gold);
  text-decoration: none;
  transition: gap 0.2s;
  margin-top: auto;
}
.b2b-action:hover {
  gap: 10px;
}

.inquiry-banner {
  background: var(--white);
  border: 1px solid var(--rule);
  border-radius: var(--r-xl);
  padding: 36px 40px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 32px;
  align-items: center;
  box-shadow: var(--sh);
}

.inquiry-title {
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 8px;
  line-height: 1.45;
}

.inquiry-desc {
  font-size: 0.85rem;
  color: var(--text-mid);
  line-height: 1.75;
}

.inquiry-contact {
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: flex-end;
}

.contact-tel {
  text-align: right;
}

.tel-label {
  font-size: 0.65rem;
  color: var(--text-lite);
  letter-spacing: 0.08em;
  display: block;
}

.tel-num {
  font-family: var(--serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--navy);
  letter-spacing: 0.04em;
  text-decoration: none;
}

.tel-hours {
  font-size: 0.65rem;
  color: var(--text-lite);
  display: block;
  margin-top: 2px;
}

.faq-section {
  background: var(--white);
}

.faq-list {
  max-width: 780px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.faq-item {
  border-bottom: 1px solid var(--rule);
}
.faq-item:first-child {
  border-top: 1px solid var(--rule);
}
.faq-item.open .faq-arrow {
  transform: rotate(180deg);
}
.faq-item.open .faq-answer {
  display: block;
}

.faq-question {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px 4px;
  cursor: pointer;
  user-select: none;
}

.faq-q-mark {
  font-family: var(--serif);
  font-size: 1rem;
  font-weight: 700;
  color: var(--gold);
  flex-shrink: 0;
  width: 20px;
  line-height: 1.6;
}

.faq-q-text {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.6;
  flex: 1;
}

.faq-arrow {
  margin-left: auto;
  color: var(--text-lite);
  font-size: 0.7rem;
  padding-top: 4px;
  transition: transform 0.3s;
}

.faq-answer {
  display: none;
  padding: 0 4px 20px 36px;
  font-size: 0.86rem;
  color: var(--text-mid);
  line-height: 1.85;
}
.faq-answer a {
  color: var(--gold);
}

.cta-section {
  background: var(--navy);
  padding: 80px 32px;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 700px 500px at 100% 50%, rgba(184, 151, 62, 0.09) 0%, transparent 55%);
  pointer-events: none;
}
.cta-section::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(180deg, var(--gold) 0%, transparent 100%);
}

.cta-inner {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
  position: relative;
  z-index: 1;
}
.cta-inner h2 {
  font-family: var(--serif);
  font-size: clamp(1.4rem, 2.8vw, 2rem);
  font-weight: 700;
  color: var(--white);
  line-height: 1.5;
  margin-bottom: 16px;
}
.cta-inner p {
  color: rgba(255, 255, 255, 0.55);
  font-size: 0.9rem;
  line-height: 1.85;
  margin-bottom: 36px;
}

.cta-btns {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

.fade-up {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-up.visible {
  opacity: 1;
  transform: none;
}
.fade-up:nth-child(2) {
  transition-delay: 0.08s;
}
.fade-up:nth-child(3) {
  transition-delay: 0.16s;
}
.fade-up:nth-child(4) {
  transition-delay: 0.24s;
}

@media (max-width: 900px) {
  .hero-inner {
    grid-template-columns: 1fr;
  }
  .hero-books {
    display: none;
  }
  .book-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .law-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .law-item:first-child {
    border-radius: var(--r-lg) 0 0 0;
  }
  .law-item:nth-child(2) {
    border-radius: 0 var(--r-lg) 0 0;
  }
  .law-item:nth-child(3) {
    border-radius: 0 0 0 var(--r-lg);
  }
  .law-item:last-child {
    border-radius: 0 0 var(--r-lg) 0;
  }
  .chikujo-card {
    grid-template-columns: 1fr;
  }
  .chikujo-card-left {
    padding: 32px;
    flex-direction: row;
    gap: 24px;
  }
  .b2b-grid {
    grid-template-columns: 1fr;
  }
  .inquiry-banner {
    grid-template-columns: 1fr;
  }
  .inquiry-contact {
    align-items: flex-start;
  }
  .author-card-body {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .author-item + .author-item {
    border-left: none;
    padding-left: 0;
    border-top: 1px solid var(--rule);
    padding-top: 32px;
  }
}
@media (max-width: 640px) {
  section {
    padding: 52px 20px;
  }
  .hero {
    padding: 52px 20px 56px;
  }
  .book-grid {
    grid-template-columns: 1fr;
    max-width: 300px;
    margin: 0 auto;
  }
  .tabs {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
  .b2b-section {
    padding: 52px 20px;
  }
  .inquiry-banner {
    padding: 28px 24px;
  }
}