@charset "UTF-8";
*, *::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);
}
@media (max-width: 640px) {
  .site-footer {
    padding: 36px 20px 24px;
  }
}

.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);
}

.hero {
  background: radial-gradient(ellipse at 30% 50%, var(--navy-lite) 0%, var(--navy) 60%);
  position: relative;
  overflow: hidden;
  height: 500px;
  color: var(--white);
}
@media (max-width: 900px) {
  .hero {
    height: 460px;
  }
}
@media (max-width: 640px) {
  .hero {
    height: auto;
    min-height: 580px;
  }
}

.hero-inner {
  max-width: 1100px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
  height: 100%;
}
@media (max-width: 900px) {
  .hero-inner {
    padding: 0 40px;
  }
}
@media (max-width: 640px) {
  .hero-inner {
    padding: 0 20px;
    height: auto;
  }
}

.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
}
.hero-glow--gold {
  width: 600px;
  height: 600px;
  background: rgba(212, 168, 65, 0.18);
  top: -200px;
  left: 10%;
}
.hero-glow--blue {
  width: 400px;
  height: 400px;
  background: rgba(26, 58, 107, 0.6);
  bottom: -150px;
  right: 10%;
}

.hero-label {
  position: absolute;
  top: 78px;
  left: 64px;
  font-family: var(--font-serif);
  font-size: 0.75rem;
  letter-spacing: 0.3em;
  color: var(--gold-lite);
  z-index: 3;
}
.hero-label::before {
  content: "";
  display: inline-block;
  width: 32px;
  height: 1px;
  background: var(--gold);
  vertical-align: middle;
  margin-right: 12px;
}
@media (max-width: 900px) {
  .hero-label {
    left: 40px;
    top: 74px;
    font-size: 0.688rem;
  }
}
@media (max-width: 640px) {
  .hero-label {
    left: 50%;
    transform: translateX(-50%);
    top: 66px;
    font-size: 0.625rem;
    letter-spacing: 0.2em;
    white-space: nowrap;
  }
  .hero-label::before {
    display: none;
  }
}

.hero-slides {
  display: flex;
  align-items: center;
  height: 100%;
  padding: 108px 0 64px;
}
@media (max-width: 900px) {
  .hero-slides {
    padding: 96px 0 52px;
  }
}
@media (max-width: 640px) {
  .hero-slides {
    padding: 96px 20px 72px;
  }
}

.hero-slide {
  display: flex;
  align-items: center;
  gap: 56px;
  width: 100%;
  position: absolute;
  opacity: 0;
  transition: opacity 0.8s ease;
  pointer-events: none;
}
.hero-slide.active {
  opacity: 1;
  position: relative;
  pointer-events: auto;
}
@media (max-width: 900px) {
  .hero-slide {
    gap: 40px;
  }
}
@media (max-width: 640px) {
  .hero-slide {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 22px;
  }
}

.hero-cover-wrap {
  position: relative;
  flex-shrink: 0;
  width: 220px;
  height: 310px;
}
.hero-cover-wrap::after {
  content: "";
  position: absolute;
  left: 8px;
  right: -8px;
  top: 0;
  bottom: -8px;
  background: rgba(212, 168, 65, 0.1);
  z-index: -1;
}
@media (max-width: 900px) {
  .hero-cover-wrap {
    width: 180px;
    height: 254px;
  }
}
@media (max-width: 640px) {
  .hero-cover-wrap {
    width: 150px;
    height: 212px;
  }
}

.hero-cover {
  width: 100%;
  height: 100%;
  object-fit: cover;
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.5), 0 15px 30px rgba(0, 0, 0, 0.3);
  background: var(--navy-lite);
}

.hero-book-info {
  flex: 1;
  max-width: 520px;
}

.hero-badges {
  margin-bottom: 18px;
}

.hero-cat-badge {
  display: inline-block;
  font-size: 0.625rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  padding: 4px 10px 3px;
  margin-right: 8px;
  border: 1px solid;
  vertical-align: middle;
}
.hero-cat-badge--law {
  color: var(--gold-lite);
  border-color: rgba(212, 175, 85, 0.55);
  background: rgba(184, 151, 62, 0.12);
}
.hero-cat-badge--exam {
  color: #7BD4A6;
  border-color: rgba(76, 175, 128, 0.7);
  background: rgba(42, 140, 90, 0.18);
}

.hero-new-badge {
  display: inline-block;
  background: var(--gold-lite);
  color: var(--navy);
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 0.688rem;
  letter-spacing: 0.15em;
  padding: 4px 10px;
}

.hero-year-badge {
  display: inline-block;
  background: #4CAF80;
  color: var(--navy);
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 0.688rem;
  letter-spacing: 0.08em;
  padding: 4px 10px;
  margin-left: 8px;
}

.hero-book-title {
  font-family: var(--font-serif);
  font-size: 2.25rem;
  font-weight: 600;
  line-height: 1.35;
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}
@media (max-width: 900px) {
  .hero-book-title {
    font-size: 1.625rem;
  }
}
@media (max-width: 640px) {
  .hero-book-title {
    font-size: 1.2rem;
    line-height: 1.45;
    margin-bottom: 10px;
  }
}

.hero-book-meta {
  font-size: 0.813rem;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 8px;
  letter-spacing: 0.05em;
}
@media (max-width: 640px) {
  .hero-book-meta {
    font-size: 0.688rem;
    margin-bottom: 6px;
  }
}

.hero-book-price {
  font-family: var(--font-serif);
  font-size: 1.375rem;
  font-weight: 500;
  color: var(--gold);
  margin-bottom: 28px;
}
.hero-book-price .tax {
  font-size: 0.813rem;
  color: rgba(212, 168, 65, 0.7);
  margin-left: 6px;
}
@media (max-width: 900px) {
  .hero-book-price {
    font-size: 1.25rem;
  }
}
@media (max-width: 640px) {
  .hero-book-price {
    font-size: 1.125rem;
    margin-bottom: 18px;
  }
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 0.875rem;
  color: var(--white);
  text-decoration: none;
  padding: 14px 32px;
  border: 1px solid rgba(212, 168, 65, 0.5);
  background: rgba(212, 168, 65, 0.08);
  transition: all 0.3s;
  letter-spacing: 0.08em;
}
.hero-cta:hover {
  background: rgba(212, 168, 65, 0.2);
  border-color: var(--gold);
}
.hero-cta .arrow {
  font-family: var(--font-serif);
  color: var(--gold);
}
@media (max-width: 900px) {
  .hero-cta {
    padding: 12px 24px;
    font-size: 0.813rem;
  }
}
@media (max-width: 640px) {
  .hero-cta {
    padding: 11px 24px;
    font-size: 0.75rem;
  }
}

@media (max-width: 640px) {
  .hero-cat-badge,
  .hero-new-badge,
  .hero-year-badge {
    font-size: 0.563rem;
    padding: 3px 8px 2px;
    letter-spacing: 0.1em;
  }
}

.hero-dots {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 12px;
  z-index: 3;
}
@media (max-width: 640px) {
  .hero-dots {
    bottom: 22px;
  }
}
.hero-dots span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.25);
  transition: all 0.3s;
  cursor: pointer;
}
.hero-dots span.active {
  background: var(--gold);
  width: 28px;
  border-radius: 4px;
}
@media (max-width: 640px) {
  .hero-dots span {
    width: 6px;
    height: 6px;
  }
  .hero-dots span.active {
    width: 20px;
  }
}

.hero-counter {
  position: absolute;
  right: 64px;
  bottom: 32px;
  font-family: var(--font-serif);
  font-size: 0.813rem;
  color: rgba(255, 255, 255, 0.6);
  z-index: 3;
}
.hero-counter .current {
  color: var(--gold);
  font-size: 1.125rem;
}
@media (max-width: 900px) {
  .hero-counter {
    right: 40px;
    bottom: 24px;
  }
}
@media (max-width: 640px) {
  .hero-counter {
    display: none;
  }
}

.section-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 12px;
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 48px;
  line-height: 1.4;
}

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

.audience-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
@media (max-width: 900px) {
  .audience-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin: 0 auto;
  }
}

.audience-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.audience-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.card-header {
  padding: 36px 32px 28px;
  position: relative;
  overflow: hidden;
}
.card-header::after {
  content: "";
  position: absolute;
  right: -20px;
  bottom: -30px;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  opacity: 0.12;
}

.card-hanbaisha .card-header {
  background: var(--green);
}
.card-hanbaisha .card-header::after {
  background: var(--green-bg);
  opacity: 0.3;
}
.card-hanbaisha .card-cta {
  background: var(--green);
}
.card-hanbaisha .card-cta:hover {
  background: #1E5236;
}
.card-hanbaisha .tag {
  background: rgba(255, 255, 255, 0.2);
  color: white;
}
.card-hanbaisha .card-features li::before {
  content: "✓";
  background: var(--green-bg);
  color: var(--green);
  font-size: 0.65rem;
  font-weight: 700;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-houritsu .card-header {
  background: var(--blue);
}
.card-houritsu .card-header::after {
  background: var(--blue-bg);
  opacity: 0.3;
}
.card-houritsu .card-cta {
  background: var(--blue);
}
.card-houritsu .card-cta:hover {
  background: #133861;
}
.card-houritsu .tag {
  background: rgba(255, 255, 255, 0.2);
  color: white;
}
.card-houritsu .card-features li::before {
  content: "✓";
  background: var(--blue-bg);
  color: var(--blue);
  font-size: 0.65rem;
  font-weight: 700;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-system .card-header {
  background: var(--teal);
}
.card-system .card-header::after {
  background: var(--teal-bg);
  opacity: 0.3;
}
.card-system .card-cta {
  background: var(--teal);
}
.card-system .card-cta:hover {
  background: #134A52;
}
.card-system .tag {
  background: rgba(255, 255, 255, 0.2);
  color: white;
}
.card-system .card-features li::before {
  content: "✓";
  background: var(--teal-bg);
  color: var(--teal);
  font-size: 0.65rem;
  font-weight: 700;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.18);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 1.6rem;
}

.card-number {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 10px;
}

.card-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 8px;
  line-height: 1.4;
}

.card-subtitle {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.65);
  line-height: 1.6;
}

.card-body {
  padding: 24px 32px;
  flex: 1;
  background: var(--white);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.card-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.card-features li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.88rem;
  color: var(--text-mid);
  line-height: 1.5;
}
.card-features li::before {
  flex-shrink: 0;
  margin-top: 1px;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tag {
  font-size: 0.68rem;
  font-weight: 500;
  padding: 3px 10px;
  border-radius: 100px;
  letter-spacing: 0.04em;
}

.tag-green {
  background: var(--green-bg);
  color: var(--green);
}

.tag-blue {
  background: var(--blue-bg);
  color: var(--blue);
}

.tag-teal {
  background: var(--teal-bg);
  color: var(--teal);
}

.card-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 24px;
  color: white;
  font-weight: 600;
  font-size: 0.88rem;
  letter-spacing: 0.04em;
  transition: background 0.2s;
  text-decoration: none;
  margin-top: auto;
}
.card-cta::after {
  content: "→";
  font-size: 1rem;
  transition: transform 0.2s;
}

.audience-card:hover .card-cta::after {
  transform: translateX(4px);
}

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

.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
}

.news-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 22px 24px;
  box-shadow: var(--shadow);
  text-decoration: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.news-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}
.news-card:hover .news-title {
  color: var(--navy-lite);
}

.news-meta {
  display: flex;
  align-items: center;
  gap: 10px;
}

.news-date {
  font-size: 0.72rem;
  color: var(--text-lite);
  font-weight: 500;
}

.news-badge {
  font-size: 0.65rem;
  font-weight: 700;
  padding: 2px 9px;
  border-radius: 100px;
  background: rgba(184, 151, 62, 0.12);
  color: var(--gold);
  letter-spacing: 0.05em;
}
.news-badge.new {
  background: rgba(220, 60, 60, 0.1);
  color: #C0392B;
}

.news-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.55;
}

.strengths-section {
  background: var(--navy);
  position: relative;
  overflow: hidden;
}
.strengths-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 800px 600px at 100% 0%, rgba(184, 151, 62, 0.08) 0%, transparent 50%);
  pointer-events: none;
}
.strengths-section .section-label {
  color: var(--gold-lite);
}
.strengths-section .section-title {
  color: var(--white);
  margin-bottom: 40px;
}

.strengths-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2px;
}
@media (max-width: 900px) {
  .strengths-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 640px) {
  .strengths-grid {
    grid-template-columns: 1fr;
  }
}

.strength-item {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.07);
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: background 0.2s;
}
.strength-item:hover {
  background: rgba(255, 255, 255, 0.07);
}
.strength-item:first-child {
  border-radius: var(--radius) 0 0 var(--radius);
}
.strength-item:last-child {
  border-radius: 0 var(--radius) var(--radius) 0;
}
@media (max-width: 900px) {
  .strength-item:first-child {
    border-radius: var(--radius) 0 0 0;
  }
  .strength-item:nth-child(2) {
    border-radius: 0 var(--radius) 0 0;
  }
  .strength-item:nth-child(3) {
    border-radius: 0 0 0 var(--radius);
  }
  .strength-item:last-child {
    border-radius: 0 0 var(--radius) 0;
  }
}
@media (max-width: 640px) {
  .strength-item:first-child {
    border-radius: var(--radius) var(--radius) 0 0;
  }
  .strength-item:nth-child(2), .strength-item:nth-child(3) {
    border-radius: 0;
  }
  .strength-item:last-child {
    border-radius: 0 0 var(--radius) var(--radius);
  }
}

.strength-icon {
  font-size: 1.8rem;
  margin-bottom: 4px;
}

.strength-num {
  font-family: var(--font-serif);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--gold-lite);
  line-height: 1;
}
.strength-num sub {
  font-size: 0.9rem;
  vertical-align: baseline;
  margin-left: 2px;
  color: rgba(255, 255, 255, 0.5);
}

.strength-label {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.55);
  line-height: 1.5;
}

.page-hero {
  background: linear-gradient(135deg, #0d1f3c 0%, #1a3a6b 100%);
  color: #fff;
  padding: 7rem 0 4rem;
  text-align: center;
}
@media (max-width: 640px) {
  .page-hero {
    padding: 5rem 0 3rem;
  }
}
.page-hero .section-label {
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 0.75rem;
}

.page-hero-title {
  font-family: "Noto Serif JP", serif;
  font-size: 2.2rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  margin-bottom: 1rem;
}
@media (max-width: 640px) {
  .page-hero-title {
    font-size: 1.6rem;
  }
}

.page-hero-desc {
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.7);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.8;
}

.corp-section {
  padding: 4rem 0;
}
@media (max-width: 640px) {
  .corp-section {
    padding: 2.5rem 0;
  }
}
.corp-section--alt {
  background: #f6f7fb;
}
.corp-section .section-title {
  font-family: "Noto Serif JP", serif;
  font-size: 1.5rem;
  font-weight: 700;
  color: #0d1f3c;
  text-align: center;
  margin-bottom: 2.5rem;
  letter-spacing: 0.04em;
}
@media (max-width: 640px) {
  .corp-section .section-title {
    font-size: 1.25rem;
    margin-bottom: 2rem;
  }
}

.corp-table {
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
  border-collapse: collapse;
}
.corp-table th,
.corp-table td {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid #e5e7eb;
  font-size: 0.92rem;
  line-height: 1.7;
  text-align: left;
  vertical-align: top;
}
.corp-table th {
  width: 160px;
  font-weight: 600;
  color: #0d1f3c;
  background: rgba(13, 31, 60, 0.03);
  white-space: nowrap;
}
@media (max-width: 640px) {
  .corp-table th {
    width: 110px;
    font-size: 0.85rem;
    padding: 0.75rem;
  }
}
.corp-table td {
  color: #374151;
}
@media (max-width: 640px) {
  .corp-table td {
    font-size: 0.85rem;
    padding: 0.75rem;
  }
}
.corp-table a {
  color: #1a3a6b;
  text-decoration: underline;
}
.corp-table a:hover {
  color: #b8860b;
}

.corp-business-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.corp-business-list li {
  position: relative;
  padding-left: 1.2em;
}
.corp-business-list li::before {
  content: "・";
  position: absolute;
  left: 0;
}

.officers-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  max-width: 900px;
  margin: 0 auto;
}
@media (max-width: 900px) {
  .officers-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 640px) {
  .officers-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
}

.officer-card {
  background: #fff;
  border-radius: 12px;
  padding: 2rem 1.5rem;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
  text-align: center;
}

.officer-role {
  font-size: 0.75rem;
  font-weight: 600;
  color: #b8860b;
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
}

.officer-name {
  font-family: "Noto Serif JP", serif;
  font-size: 1.2rem;
  font-weight: 700;
  color: #0d1f3c;
  margin-bottom: 1rem;
}

.officer-degree {
  font-size: 0.8rem;
  font-weight: 400;
  color: #6b7280;
}

.officer-desc {
  font-size: 0.85rem;
  line-height: 1.7;
  color: #4b5563;
  text-align: left;
}

.access-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  max-width: 900px;
  margin: 0 auto;
}
@media (max-width: 640px) {
  .access-content {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
}

.access-address {
  font-size: 0.95rem;
  line-height: 1.8;
  color: #374151;
  margin-bottom: 1.5rem;
}

.access-stations {
  list-style: none;
  padding: 0;
  margin: 0;
}
.access-stations li {
  font-size: 0.88rem;
  line-height: 1.6;
  color: #4b5563;
  padding: 0.4rem 0;
  border-bottom: 1px solid #f3f4f6;
}
.access-stations li strong {
  color: #0d1f3c;
}

.access-map {
  border-radius: 12px;
  overflow: hidden;
}
.access-map iframe {
  display: block;
  border-radius: 12px;
}

.contact-categories {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  max-width: 900px;
  margin: 0 auto;
}
@media (max-width: 640px) {
  .contact-categories {
    grid-template-columns: 1fr;
  }
}

.contact-cat {
  background: #fff;
  border-radius: 12px;
  padding: 2rem 1.5rem;
  text-align: center;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
  transition: transform 0.2s, box-shadow 0.2s;
}
.contact-cat:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
}
.contact-cat h3 {
  font-family: "Noto Serif JP", serif;
  font-size: 1rem;
  color: #0d1f3c;
  margin-bottom: 0.5rem;
}
.contact-cat p {
  font-size: 0.85rem;
  color: #6b7280;
  line-height: 1.6;
}

.contact-cat-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.contact-form {
  max-width: 700px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: 1.5rem;
}
.form-group label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: #0d1f3c;
  margin-bottom: 0.5rem;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid #d1d5db;
  border-radius: 8px;
  font-size: 0.92rem;
  font-family: "Noto Sans JP", sans-serif;
  transition: border-color 0.2s, box-shadow 0.2s;
  background: #fff;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: #1a3a6b;
  box-shadow: 0 0 0 3px rgba(26, 58, 107, 0.1);
}
.form-group textarea {
  resize: vertical;
  min-height: 140px;
}
.form-group select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M6 8L1 3h10z' fill='%236b7280'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}
@media (max-width: 640px) {
  .form-row {
    grid-template-columns: 1fr;
    gap: 0;
  }
}

.required {
  color: #dc2626;
  font-size: 0.75rem;
  font-weight: 400;
  margin-left: 0.25em;
}

.form-note {
  margin-bottom: 1.5rem;
  padding: 1rem 1.25rem;
  background: rgba(13, 31, 60, 0.03);
  border-radius: 8px;
}
.form-note p {
  font-size: 0.85rem;
  color: #6b7280;
  line-height: 1.7;
}
.form-note a {
  color: #1a3a6b;
  text-decoration: underline;
}

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

.btn-primary {
  display: inline-block;
  padding: 0.85rem 3rem;
  background: linear-gradient(135deg, #0d1f3c 0%, #1a3a6b 100%);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  font-family: "Noto Sans JP", sans-serif;
  cursor: pointer;
  transition: opacity 0.2s, transform 0.2s;
  letter-spacing: 0.05em;
}
.btn-primary:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

.contact-alt-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  max-width: 800px;
  margin: 0 auto;
}
@media (max-width: 640px) {
  .contact-alt-grid {
    grid-template-columns: 1fr;
  }
}

.contact-alt-item {
  text-align: center;
  padding: 1.5rem;
}
.contact-alt-item h3 {
  font-size: 0.8rem;
  font-weight: 600;
  color: #6b7280;
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
}

.contact-alt-value {
  font-family: "Noto Serif JP", serif;
  font-size: 1.1rem;
  font-weight: 600;
  color: #0d1f3c;
  margin-bottom: 0.25rem;
}

.contact-alt-note {
  font-size: 0.8rem;
  color: #9ca3af;
}
.contact-alt-note a {
  color: #1a3a6b;
  text-decoration: underline;
}

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

.legal-intro {
  font-size: 0.95rem;
  line-height: 1.9;
  color: #374151;
  margin-bottom: 2rem;
}

.legal-updated {
  padding: 0.75rem 1.25rem;
  background: rgba(13, 31, 60, 0.03);
  border-radius: 8px;
  margin-bottom: 2.5rem;
}
.legal-updated p {
  font-size: 0.85rem;
  color: #6b7280;
  margin: 0;
}

.legal-article {
  margin-bottom: 2.5rem;
}
.legal-article h2 {
  font-family: "Noto Serif JP", serif;
  font-size: 1.1rem;
  font-weight: 700;
  color: #0d1f3c;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid #b8860b;
}
.legal-article p {
  font-size: 0.92rem;
  line-height: 1.8;
  color: #374151;
  margin-bottom: 0.75rem;
}
.legal-article ol {
  padding-left: 1.5rem;
  margin-bottom: 1rem;
}
.legal-article ol li {
  font-size: 0.92rem;
  line-height: 1.8;
  color: #374151;
  margin-bottom: 0.35rem;
}

.legal-contact {
  padding: 1.25rem 1.5rem;
  background: #f6f7fb;
  border-radius: 8px;
}
.legal-contact p {
  font-size: 0.9rem;
  line-height: 1.8;
  margin: 0;
}
.legal-contact a {
  color: #1a3a6b;
  text-decoration: underline;
}

.news-filter {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}

.news-filter-btn {
  padding: 0.5rem 1.25rem;
  border: 1px solid #d1d5db;
  border-radius: 100px;
  background: #fff;
  font-size: 0.85rem;
  font-family: "Noto Sans JP", sans-serif;
  color: #6b7280;
  cursor: pointer;
  transition: all 0.2s;
}
.news-filter-btn:hover {
  border-color: #1a3a6b;
  color: #1a3a6b;
}
.news-filter-btn.active {
  background: #0d1f3c;
  border-color: #0d1f3c;
  color: #fff;
}

.news-list {
  max-width: 800px;
  margin: 0 auto;
}

.news-list-item {
  display: block;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid #e5e7eb;
  text-decoration: none;
  transition: background 0.2s;
}
.news-list-item:first-child {
  border-top: 1px solid #e5e7eb;
}
.news-list-item:hover {
  background: rgba(13, 31, 60, 0.02);
}

.news-list-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}
.news-list-meta time {
  font-size: 0.8rem;
  color: #9ca3af;
  font-variant-numeric: tabular-nums;
}

.news-list-badge {
  font-size: 0.65rem;
  font-weight: 700;
  padding: 0.15rem 0.5rem;
  border-radius: 3px;
  background: #b8860b;
  color: #fff;
  letter-spacing: 0.05em;
}
.news-list-badge.badge-new {
  background: #dc2626;
}

.news-list-cat {
  font-size: 0.75rem;
  color: #6b7280;
}

.news-list-title {
  font-size: 0.92rem;
  color: #374151;
  line-height: 1.6;
}

.article-hero {
  background: linear-gradient(135deg, #0d1f3c 0%, #1a3a6b 100%);
  color: #fff;
  padding: 7rem 0 3.5rem;
}
@media (max-width: 640px) {
  .article-hero {
    padding: 5rem 0 2.5rem;
  }
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}
.article-meta time {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.5);
  font-variant-numeric: tabular-nums;
}

.article-badge {
  font-size: 0.65rem;
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  border-radius: 3px;
  background: #b8860b;
  color: #fff;
  letter-spacing: 0.05em;
}
.article-badge.badge-info {
  background: #1a3a6b;
}

.article-edition-badge {
  display: inline-block;
  font-size: 0.65rem;
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  border-radius: 3px;
  color: #fff;
  letter-spacing: 0.05em;
  margin-left: 6px;
}
.article-edition-badge--old {
  background: #888;
}
.article-edition-badge--latest {
  background: var(--red-accent, #c0392b);
}
.article-edition-badge--new {
  background: #e67e22;
}

.article-title {
  font-family: "Noto Serif JP", serif;
  font-size: 1.8rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 1rem;
}
@media (max-width: 640px) {
  .article-title {
    font-size: 1.35rem;
  }
}

.article-lead {
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.65);
  line-height: 1.8;
  max-width: 700px;
}

.article-section {
  padding: 3rem 0;
}
@media (max-width: 640px) {
  .article-section {
    padding: 2rem 0;
  }
}
.article-section--alt {
  background: #f6f7fb;
}

.article-section-title {
  font-family: "Noto Serif JP", serif;
  font-size: 1.25rem;
  font-weight: 700;
  color: #0d1f3c;
  margin-bottom: 1.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid #b8860b;
  display: inline-block;
}

.book-detail-card {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 3rem;
  max-width: 850px;
  margin: 0 auto;
}
@media (max-width: 900px) {
  .book-detail-card {
    grid-template-columns: 200px 1fr;
    gap: 2rem;
  }
}
@media (max-width: 640px) {
  .book-detail-card {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
}

@media (max-width: 640px) {
  .book-detail-cover {
    max-width: 240px;
    margin: 0 auto;
  }
}

.book-gallery-main {
  position: relative;
  background: linear-gradient(145deg, #f7f5f0 0%, #ece8df 100%);
  border-radius: 12px;
  padding: 20px;
  text-align: center;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06), inset 0 1px 0 rgba(255, 255, 255, 0.8);
}
.book-gallery-main img {
  width: 80%;
  max-width: 220px;
  height: auto;
  border-radius: 4px;
  box-shadow: 4px 4px 16px rgba(0, 0, 0, 0.18), -2px -2px 8px rgba(255, 255, 255, 0.4);
  cursor: zoom-in;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.book-gallery-main img:hover {
  transform: scale(1.03);
  box-shadow: 6px 6px 24px rgba(0, 0, 0, 0.22), -2px -2px 12px rgba(255, 255, 255, 0.5);
}

.book-gallery-thumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
  padding: 10px 12px;
  background: #f8f7f4;
  border-radius: 8px;
  border: 1px solid #e8e4dc;
}
.book-gallery-thumbs .gallery-thumb {
  width: 52px;
  height: 70px;
  object-fit: cover;
  border-radius: 4px;
  border: 2px solid transparent;
  cursor: pointer;
  opacity: 0.5;
  transition: all 0.25s ease;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.1);
}
.book-gallery-thumbs .gallery-thumb:hover {
  opacity: 0.85;
  transform: translateY(-2px);
  box-shadow: 0 3px 8px rgba(0, 0, 0, 0.15);
}
.book-gallery-thumbs .gallery-thumb.active {
  opacity: 1;
  border-color: #0d1f3c;
  box-shadow: 0 2px 8px rgba(13, 31, 60, 0.25);
}

.book-preview-cta {
  margin-top: 1.5rem;
  padding: 1.25rem;
  background: linear-gradient(135deg, #f0f7ff 0%, #e8f0fb 100%);
  border: 1px solid #c4d8ee;
  border-radius: 10px;
}

.preview-cta-heading {
  font-size: 0.78rem;
  font-weight: 700;
  color: #1a5694;
  margin-bottom: 0.75rem;
  letter-spacing: 0.04em;
}

.preview-cta-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.preview-cta-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 1 1 0;
  min-width: 160px;
  padding: 0.85rem 1rem;
  background: #fff;
  border: 1px solid #c4d8ee;
  border-radius: 8px;
  text-decoration: none;
  color: #1a5694;
  transition: all 0.2s ease;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}
.preview-cta-btn:hover {
  background: #f0f7ff;
  border-color: #a0c0e0;
  box-shadow: 0 3px 10px rgba(26, 86, 148, 0.12);
  transform: translateY(-1px);
}

.preview-cta-icon {
  font-size: 1.6rem;
  line-height: 1;
  flex-shrink: 0;
}

.preview-cta-label {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.preview-cta-main {
  font-size: 0.88rem;
  font-weight: 700;
}

.preview-cta-sub {
  font-size: 0.68rem;
  color: #7a9bc0;
  font-weight: 400;
}

.book-files {
  margin-top: 1.75rem;
  padding-top: 1.5rem;
  border-top: 1px solid #e5e7eb;
}
.book-files .book-file-group {
  margin-bottom: 1.25rem;
}
.book-files .book-file-group:last-child {
  margin-bottom: 0;
}
.book-files .book-file-group-title {
  font-size: 0.72rem;
  font-weight: 700;
  color: #8b95a5;
  margin-bottom: 0.5rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.book-files .book-file-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0.6rem 1.2rem;
  background: linear-gradient(135deg, #f8f9fb 0%, #f0f2f6 100%);
  border: 1px solid #dde1e8;
  border-radius: 8px;
  color: #1a3a6b;
  font-size: 0.84rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s ease;
  margin-right: 0.5rem;
  margin-bottom: 0.5rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}
.book-files .book-file-link:hover {
  background: linear-gradient(135deg, #eef2f8 0%, #e4eaf3 100%);
  border-color: #b8c4d4;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
  transform: translateY(-1px);
}
.book-files .book-file-link:active {
  transform: translateY(0);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.06);
}
.book-files .book-file-link .file-icon {
  font-size: 1.1rem;
  line-height: 1;
}
.book-files .book-file-link--sample {
  background: linear-gradient(135deg, #f0f7ff 0%, #e4effc 100%);
  border-color: #c4d8ee;
  color: #1a5694;
}
.book-files .book-file-link--sample:hover {
  background: linear-gradient(135deg, #e4effc 0%, #d4e4f6 100%);
  border-color: #a8c4e0;
}
.book-files .book-file-link--flyer {
  background: linear-gradient(135deg, #fdf8f0 0%, #f8f0e2 100%);
  border-color: #e8dcc8;
  color: #7a5c28;
}
.book-files .book-file-link--flyer:hover {
  background: linear-gradient(135deg, #f8f0e2 0%, #f0e4d0 100%);
  border-color: #d8c8a8;
}

.book-detail-name {
  font-family: "Noto Serif JP", serif;
  font-size: 1.3rem;
  font-weight: 700;
  color: #0d1f3c;
  margin-bottom: 1.25rem;
  line-height: 1.4;
}

.book-meta-table {
  width: 100%;
  margin-bottom: 1.5rem;
}
.book-meta-table tr {
  border-bottom: 1px solid #e5e7eb;
}
.book-meta-table th {
  width: 80px;
  padding: 0.6rem 0;
  font-size: 0.8rem;
  font-weight: 600;
  color: #6b7280;
  vertical-align: top;
  white-space: nowrap;
}
.book-meta-table td {
  padding: 0.6rem 0;
  font-size: 0.9rem;
  color: #374151;
  line-height: 1.5;
}

.book-price {
  font-weight: 700;
  color: #0d1f3c;
  font-size: 1rem;
}

.buy-columns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.buy-column {
  padding: 1.5rem;
  background: linear-gradient(135deg, #f6f8fb 0%, #eef1f6 100%);
  border: 1px solid #d0d8e4;
  border-radius: 12px;
}

.buy-column--pdf {
  background: linear-gradient(135deg, #f8fdf8 0%, #eef7ee 100%);
  border-color: #c8e0c8;
}

.buy-column-label {
  font-size: 0.82rem;
  font-weight: 700;
  color: #3a4a5c;
  margin-bottom: 0.85rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid rgba(0, 0, 0, 0.06);
}

.buy-column--pdf .buy-column-label {
  color: #2a6a2a;
  border-bottom-color: rgba(42, 106, 42, 0.12);
}

.buy-column-buttons {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.btn-buy-pdf {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0.8rem 1.5rem;
  background: linear-gradient(135deg, #1a8a3a 0%, #228b22 100%);
  color: #fff;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 700;
  text-decoration: none;
  transition: all 0.2s;
  box-shadow: 0 2px 6px rgba(34, 139, 34, 0.2);
}
.btn-buy-pdf:hover {
  background: linear-gradient(135deg, #228b22 0%, #2aa02a 100%);
  box-shadow: 0 4px 12px rgba(34, 139, 34, 0.3);
  transform: translateY(-1px);
}

.btn-buy-pdf-price {
  font-size: 0.75rem;
  font-weight: 400;
  opacity: 0.9;
  margin-left: 4px;
}

.buy-pdf-wm-notice {
  margin-top: 0.85rem;
  padding: 0.85rem 1rem;
  background: #fff;
  border: 1px solid #d8e8d8;
  border-radius: 6px;
  font-size: 0.75rem;
  color: #555;
  line-height: 1.7;
}

.wm-notice-title {
  font-weight: 700;
  font-size: 0.72rem;
  color: #3a6a3a;
  margin-bottom: 0.4rem;
  letter-spacing: 0.04em;
}

.wm-notice-body {
  margin-bottom: 0.5rem;
}

.wm-notice-sample {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0.5rem 0.75rem;
  background: #f8f8f0;
  border: 1px dashed #ccc;
  border-radius: 4px;
  font-family: monospace;
}

.wm-notice-sample-label {
  font-size: 0.68rem;
  color: #888;
  font-family: sans-serif;
  white-space: nowrap;
}

.wm-notice-sample-text {
  font-size: 0.72rem;
  color: #666;
  opacity: 0.7;
}

.btn-buy-shop {
  display: inline-block;
  padding: 0.7rem 1.5rem;
  background: linear-gradient(135deg, #1a6b3a 0%, #228b22 100%);
  color: #fff;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s;
  box-shadow: 0 2px 6px rgba(34, 139, 34, 0.15);
}
.btn-buy-shop:hover {
  opacity: 0.9;
  box-shadow: 0 3px 10px rgba(34, 139, 34, 0.25);
}

.btn-buy-primary {
  display: inline-block;
  padding: 0.7rem 1.5rem;
  background: linear-gradient(135deg, #0d1f3c 0%, #1a3a6b 100%);
  color: #fff;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  transition: opacity 0.2s;
}
.btn-buy-primary:hover {
  opacity: 0.9;
}

.btn-buy-amazon {
  display: inline-block;
  padding: 0.7rem 1.5rem;
  background: #ff9900;
  color: #111;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  transition: opacity 0.2s;
}
.btn-buy-amazon:hover {
  opacity: 0.85;
}

.btn-buy-yahoo {
  display: inline-block;
  padding: 0.7rem 1.5rem;
  background: #ff0033;
  color: #fff;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  transition: opacity 0.2s;
}
.btn-buy-yahoo:hover {
  opacity: 0.85;
}

.btn-buy-fax {
  display: inline-block;
  padding: 0.7rem 1.5rem;
  background: #fff;
  color: #374151;
  border: 1px solid #d1d5db;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 500;
  text-decoration: none;
  transition: border-color 0.2s;
}
.btn-buy-fax:hover {
  border-color: #1a3a6b;
  color: #1a3a6b;
}

.article-points {
  list-style: none;
  padding: 0;
  max-width: 700px;
}
.article-points li {
  position: relative;
  padding: 0.7rem 0 0.7rem 2rem;
  font-size: 0.92rem;
  line-height: 1.7;
  color: #374151;
  border-bottom: 1px solid #e5e7eb;
}
.article-points li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0.7rem;
  width: 22px;
  height: 22px;
  background: rgba(13, 31, 60, 0.06);
  color: #0d1f3c;
  font-size: 0.7rem;
  font-weight: 700;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}
.article-points li:last-child {
  border-bottom: none;
}

.article-keywords {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.keyword-tag {
  font-size: 0.8rem;
  padding: 0.3rem 0.8rem;
  background: rgba(13, 31, 60, 0.05);
  color: #374151;
  border-radius: 100px;
}

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

.btn-sample {
  display: inline-block;
  padding: 0.75rem 2rem;
  background: #fff;
  color: #0d1f3c;
  border: 2px solid #0d1f3c;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s;
}
.btn-sample:hover {
  background: #0d1f3c;
  color: #fff;
}

.article-blocks {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 0.75rem;
  max-width: 700px;
}

.block-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 1rem;
  background: #fff;
  border-radius: 8px;
  border: 1px solid #e5e7eb;
  font-size: 0.88rem;
  color: #374151;
}
.block-item span {
  font-size: 0.8rem;
  font-weight: 600;
  color: #0d1f3c;
}

.article-author {
  max-width: 700px;
  padding: 1.5rem;
  background: #fff;
  border-radius: 12px;
  border: 1px solid #e5e7eb;
}

.article-author-name {
  font-family: "Noto Serif JP", serif;
  font-size: 1.15rem;
  font-weight: 700;
  color: #0d1f3c;
  margin-bottom: 0.75rem;
}
.article-author-name span {
  font-size: 0.8rem;
  font-weight: 400;
  color: #6b7280;
  margin-left: 0.5em;
}

.article-author-bio {
  font-size: 0.88rem;
  line-height: 1.8;
  color: #4b5563;
}

.article-corporate-banner {
  max-width: 700px;
  margin: 0 auto;
  padding: 2rem;
  background: #fff;
  border-radius: 12px;
  border: 1px solid #e5e7eb;
  text-align: center;
}
.article-corporate-banner h3 {
  font-family: "Noto Serif JP", serif;
  font-size: 1.1rem;
  font-weight: 700;
  color: #0d1f3c;
  margin-bottom: 0.5rem;
}
.article-corporate-banner p {
  font-size: 0.88rem;
  color: #6b7280;
  margin-bottom: 1.25rem;
  line-height: 1.6;
}

.article-back {
  font-size: 0.88rem;
  color: #1a3a6b;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}
.article-back:hover {
  color: #b8860b;
}

.article-body {
  max-width: 700px;
  margin: 0 auto;
}
.article-body h2 {
  font-family: "Noto Serif JP", serif;
  font-size: 1.2rem;
  font-weight: 700;
  color: #0d1f3c;
  margin: 2rem 0 1rem;
  padding-bottom: 0.4rem;
  border-bottom: 2px solid #b8860b;
}
.article-body h3 {
  font-size: 1rem;
  font-weight: 700;
  color: #0d1f3c;
  margin: 1.5rem 0 0.75rem;
}
.article-body p {
  font-size: 0.92rem;
  line-height: 1.85;
  color: #374151;
  margin-bottom: 1rem;
}
.article-body ul, .article-body ol {
  padding-left: 1.5rem;
  margin-bottom: 1rem;
}
.article-body ul li, .article-body ol li {
  font-size: 0.92rem;
  line-height: 1.8;
  color: #374151;
  margin-bottom: 0.35rem;
}
.article-body a {
  color: #1a3a6b;
  text-decoration: underline;
}
.article-body img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  margin: 1rem 0;
}

.accordion-toc {
  max-width: 700px;
  margin: 0 auto;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  background: #fff;
  overflow: hidden;
}
.accordion-toc[open] .accordion-toc-icon::after {
  transform: rotate(90deg);
}

.accordion-toc-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  cursor: pointer;
  user-select: none;
  list-style: none;
}
.accordion-toc-toggle::-webkit-details-marker {
  display: none;
}
.accordion-toc-toggle::marker {
  display: none;
  content: "";
}
.accordion-toc-toggle:hover {
  background: rgba(13, 31, 60, 0.02);
}

.accordion-toc-icon {
  position: relative;
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}
.accordion-toc-icon::before, .accordion-toc-icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 14px;
  height: 2px;
  background: #6b7280;
  transform: translate(-50%, -50%);
  transition: transform 0.2s;
}
.accordion-toc-icon::after {
  transform: translate(-50%, -50%) rotate(0deg);
}
details:not([open]) .accordion-toc-icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

details:not([open]) .accordion-toc-icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

details[open] .accordion-toc-icon::after {
  transform: translate(-50%, -50%) rotate(0deg);
}

.accordion-toc .article-toc {
  padding: 0 1.5rem 1.5rem;
  border-top: 1px solid #e5e7eb;
}