:root {
  --ko-primary: #1a3a5c;
  --ko-primary-dark: #0f2238;
  --ko-accent: #c9a84c;
  --ko-accent-light: #e8d49a;
  --ko-bg: #f8f5ef;
  --ko-bg-white: #ffffff;
  --ko-text: #2c2c2c;
  --ko-text-muted: #666666;
  --ko-border: #ddd8cf;
  --ko-shadow: 0 2px 12px rgba(26,58,92,0.09);
  --ko-radius: 6px;
  --ko-font: 'Noto Sans JP', sans-serif;
  --ko-font-serif: Georgia, 'Times New Roman', serif;
  --ko-transition: 0.22s ease;
  --ko-max-width: 1120px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--ko-font);
  background-color: var(--ko-bg);
  color: var(--ko-text);
  line-height: 1.8;
}

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

a:hover {
  color: var(--ko-accent);
}

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

.ko-container {
  max-width: var(--ko-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

.ko-cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: var(--ko-primary);
  color: #ffffff;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  z-index: 9999;
  font-size: 0.875rem;
}

.ko-cookie-banner a {
  color: var(--ko-accent-light);
  text-decoration: underline;
}

.ko-cookie-banner.ko-hidden {
  display: none;
}

.ko-btn-cookie {
  background-color: var(--ko-accent);
  color: var(--ko-primary-dark);
  border: none;
  padding: 7px 20px;
  border-radius: var(--ko-radius);
  font-family: var(--ko-font);
  font-size: 0.875rem;
  font-weight: 700;
  cursor: pointer;
  white-space: nowrap;
  transition: background-color var(--ko-transition);
}

.ko-btn-cookie:hover {
  background-color: var(--ko-accent-light);
}

.ko-header {
  background-color: var(--ko-bg-white);
  border-bottom: 3px solid var(--ko-primary);
  position: sticky;
  top: 0;
  z-index: 900;
  box-shadow: var(--ko-shadow);
}

.ko-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  padding-bottom: 14px;
  gap: 20px;
}

.ko-header__brand {
  flex-shrink: 0;
}

.ko-header__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--ko-primary);
}

.ko-header__logo:hover {
  color: var(--ko-primary);
}

.ko-header__logo-icon {
  color: var(--ko-accent);
  font-size: 1.4rem;
}

.ko-header__tagline {
  font-size: 0.75rem;
  color: var(--ko-text-muted);
  margin-top: 3px;
}

.ko-nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--ko-primary);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 6px;
}

.ko-nav__list {
  display: flex;
  list-style: none;
  gap: 4px;
}

.ko-nav__link {
  display: block;
  padding: 8px 14px;
  border-radius: var(--ko-radius);
  font-weight: 500;
  font-size: 0.925rem;
  color: var(--ko-text);
  transition: background-color var(--ko-transition), color var(--ko-transition);
}

.ko-nav__link:hover,
.ko-nav__item--active .ko-nav__link {
  background-color: var(--ko-primary);
  color: var(--ko-bg-white);
}

.ko-hero {
  background: linear-gradient(135deg, var(--ko-primary) 0%, var(--ko-primary-dark) 100%);
  color: #ffffff;
  padding: 70px 0 60px;
}

.ko-hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: center;
}

.ko-hero__tag {
  display: inline-block;
  background-color: var(--ko-accent);
  color: var(--ko-primary-dark);
  font-size: 0.8rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 16px;
  letter-spacing: 0.05em;
}

.ko-hero__title {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 18px;
}

.ko-hero__desc {
  font-size: 1rem;
  opacity: 0.9;
  line-height: 1.8;
  margin-bottom: 28px;
}

.ko-hero__img {
  border-radius: 8px;
  overflow: hidden;
  background-color: rgba(255,255,255,0.1);
  aspect-ratio: 4/3;
  display: flex;
  align-items: center;
  justify-content: center;
}

.ko-hero__img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 8px;
}

.ko-btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: var(--ko-radius);
  font-weight: 700;
  font-size: 0.95rem;
  transition: all var(--ko-transition);
  cursor: pointer;
  border: 2px solid transparent;
}

.ko-btn--primary {
  background-color: var(--ko-accent);
  color: var(--ko-primary-dark);
  border-color: var(--ko-accent);
}

.ko-btn--primary:hover {
  background-color: var(--ko-accent-light);
  color: var(--ko-primary-dark);
  border-color: var(--ko-accent-light);
}

.ko-btn--outline {
  background-color: transparent;
  color: #ffffff;
  border-color: rgba(255,255,255,0.6);
}

.ko-btn--outline:hover {
  background-color: rgba(255,255,255,0.15);
  color: #ffffff;
}

.ko-section {
  padding: 60px 0;
}

.ko-section--white {
  background-color: var(--ko-bg-white);
}

.ko-section__header {
  text-align: center;
  margin-bottom: 40px;
}

.ko-section__label {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--ko-accent);
  text-transform: uppercase;
  margin-bottom: 10px;
}

.ko-section__title {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--ko-primary);
  margin-bottom: 12px;
}

.ko-section__desc {
  font-size: 0.95rem;
  color: var(--ko-text-muted);
  max-width: 600px;
  margin: 0 auto;
}

.ko-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 40px;
  align-items: start;
}

.ko-card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.ko-card {
  background-color: var(--ko-bg-white);
  border-radius: 8px;
  box-shadow: var(--ko-shadow);
  overflow: hidden;
  transition: transform var(--ko-transition), box-shadow var(--ko-transition);
  border: 1px solid var(--ko-border);
}

.ko-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 24px rgba(26,58,92,0.14);
}

.ko-card__img {
  aspect-ratio: 16/9;
  overflow: hidden;
  background-color: var(--ko-bg);
}

.ko-card__img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.ko-card:hover .ko-card__img img {
  transform: scale(1.04);
}

.ko-card__body {
  padding: 20px;
}

.ko-card__tag {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--ko-accent);
  letter-spacing: 0.05em;
  margin-bottom: 8px;
  display: block;
}

.ko-card__title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--ko-primary);
  margin-bottom: 10px;
  line-height: 1.5;
}

.ko-card__excerpt {
  font-size: 0.875rem;
  color: var(--ko-text-muted);
  line-height: 1.7;
  margin-bottom: 14px;
}

.ko-card__link {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--ko-primary);
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.ko-card__link:hover {
  color: var(--ko-accent);
}

.ko-sidebar {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.ko-sidebar__widget {
  background-color: var(--ko-bg-white);
  border-radius: 8px;
  box-shadow: var(--ko-shadow);
  border: 1px solid var(--ko-border);
  overflow: hidden;
}

.ko-sidebar__widget-head {
  background-color: var(--ko-primary);
  color: #ffffff;
  padding: 12px 18px;
  font-size: 0.9rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}

.ko-sidebar__widget-head i {
  color: var(--ko-accent);
}

.ko-sidebar__widget-body {
  padding: 16px 18px;
}

.ko-sidebar__link-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.ko-sidebar__link-list li a {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--ko-text);
  line-height: 1.5;
}

.ko-sidebar__link-list li a:hover {
  color: var(--ko-primary);
}

.ko-sidebar__link-list li a i {
  color: var(--ko-accent);
  margin-top: 3px;
  flex-shrink: 0;
}

.ko-keyword-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.ko-keyword-tag {
  background-color: var(--ko-bg);
  border: 1px solid var(--ko-border);
  color: var(--ko-primary);
  font-size: 0.78rem;
  padding: 5px 12px;
  border-radius: 20px;
  font-weight: 500;
}

.ko-info-box {
  background-color: #e8f0f8;
  border-left: 4px solid var(--ko-primary);
  border-radius: 0 var(--ko-radius) var(--ko-radius) 0;
  padding: 16px 18px;
  margin: 24px 0;
}

.ko-info-box p {
  font-size: 0.9rem;
  color: var(--ko-primary-dark);
}

.ko-info-box p + p {
  margin-top: 8px;
}

.ko-breadcrumb {
  background-color: var(--ko-bg);
  border-bottom: 1px solid var(--ko-border);
  padding: 12px 0;
}

.ko-breadcrumb__list {
  display: flex;
  list-style: none;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 0.82rem;
  align-items: center;
}

.ko-breadcrumb__list li {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--ko-text-muted);
}

.ko-breadcrumb__list li a {
  color: var(--ko-primary);
}

.ko-breadcrumb__list li::after {
  content: '/';
  color: var(--ko-border);
}

.ko-breadcrumb__list li:last-child::after {
  content: '';
}

.ko-article-header {
  margin-bottom: 32px;
}

.ko-article-header__tag {
  display: inline-block;
  background-color: var(--ko-accent);
  color: var(--ko-primary-dark);
  font-size: 0.78rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 14px;
}

.ko-article-header__title {
  font-size: 1.7rem;
  font-weight: 700;
  color: var(--ko-primary);
  line-height: 1.4;
  margin-bottom: 16px;
}

.ko-article-header__meta {
  font-size: 0.82rem;
  color: var(--ko-text-muted);
  display: flex;
  align-items: center;
  gap: 16px;
}

.ko-article-header__meta i {
  color: var(--ko-accent);
  margin-right: 4px;
}

.ko-article-body {
  font-size: 0.97rem;
  line-height: 1.9;
}

.ko-article-body h2 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--ko-primary);
  margin: 36px 0 14px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--ko-accent);
}

.ko-article-body h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--ko-primary-dark);
  margin: 24px 0 10px;
}

.ko-article-body p {
  margin-bottom: 18px;
}

.ko-article-body ul,
.ko-article-body ol {
  padding-left: 22px;
  margin-bottom: 18px;
}

.ko-article-body li {
  margin-bottom: 8px;
}

.ko-article-body figure {
  margin: 28px 0;
}

.ko-article-body figcaption {
  font-size: 0.8rem;
  color: var(--ko-text-muted);
  text-align: center;
  margin-top: 8px;
}

.ko-article-img {
  border-radius: 8px;
  width: 100%;
}

.ko-disclaimer-box {
  background-color: #fff7e6;
  border: 1px solid var(--ko-accent);
  border-radius: var(--ko-radius);
  padding: 20px 22px;
  margin: 32px 0;
}

.ko-disclaimer-box__title {
  font-weight: 700;
  color: var(--ko-primary);
  margin-bottom: 8px;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.ko-disclaimer-box p {
  font-size: 0.875rem;
  color: var(--ko-text-muted);
  margin: 0;
  line-height: 1.7;
}

.ko-feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 20px;
}

.ko-feature-item {
  background-color: var(--ko-bg-white);
  border-radius: 8px;
  padding: 28px 22px;
  text-align: center;
  box-shadow: var(--ko-shadow);
  border: 1px solid var(--ko-border);
}

.ko-feature-item__icon {
  font-size: 2.2rem;
  color: var(--ko-accent);
  margin-bottom: 14px;
}

.ko-feature-item__title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--ko-primary);
  margin-bottom: 10px;
}

.ko-feature-item__text {
  font-size: 0.875rem;
  color: var(--ko-text-muted);
  line-height: 1.7;
}

.ko-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-width: 680px;
  margin: 0 auto;
}

.ko-form__group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.ko-form__label {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--ko-primary);
}

.ko-form__required {
  color: #c0392b;
  margin-left: 4px;
  font-size: 0.8rem;
}

.ko-form__input,
.ko-form__select,
.ko-form__textarea {
  padding: 12px 14px;
  border: 1px solid var(--ko-border);
  border-radius: var(--ko-radius);
  font-family: var(--ko-font);
  font-size: 0.95rem;
  color: var(--ko-text);
  background-color: var(--ko-bg-white);
  transition: border-color var(--ko-transition);
  width: 100%;
}

.ko-form__input:focus,
.ko-form__select:focus,
.ko-form__textarea:focus {
  outline: none;
  border-color: var(--ko-primary);
}

.ko-form__textarea {
  resize: vertical;
  min-height: 150px;
}

.ko-form__submit {
  align-self: flex-start;
  background-color: var(--ko-primary);
  color: #ffffff;
  border: none;
  padding: 13px 36px;
  border-radius: var(--ko-radius);
  font-family: var(--ko-font);
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: background-color var(--ko-transition);
}

.ko-form__submit:hover {
  background-color: var(--ko-primary-dark);
}

.ko-alert {
  padding: 14px 18px;
  border-radius: var(--ko-radius);
  margin-bottom: 20px;
  font-size: 0.9rem;
  font-weight: 500;
}

.ko-alert--success {
  background-color: #e8f5e9;
  border: 1px solid #a5d6a7;
  color: #2e7d32;
}

.ko-alert--error {
  background-color: #ffebee;
  border: 1px solid #ef9a9a;
  color: #c62828;
}

.ko-page-title-section {
  background: linear-gradient(135deg, var(--ko-primary) 0%, var(--ko-primary-dark) 100%);
  color: #ffffff;
  padding: 50px 0 40px;
}

.ko-page-title-section h1 {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.ko-page-title-section p {
  font-size: 0.95rem;
  opacity: 0.85;
}

.ko-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  margin-bottom: 20px;
}

.ko-table th {
  background-color: var(--ko-primary);
  color: #ffffff;
  padding: 12px 14px;
  text-align: left;
  font-weight: 700;
}

.ko-table td {
  padding: 11px 14px;
  border-bottom: 1px solid var(--ko-border);
}

.ko-table tr:nth-child(even) td {
  background-color: var(--ko-bg);
}

.ko-contact-info {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
  margin-bottom: 40px;
}

.ko-contact-card {
  background-color: var(--ko-bg-white);
  border-radius: 8px;
  padding: 24px;
  box-shadow: var(--ko-shadow);
  border: 1px solid var(--ko-border);
}

.ko-contact-card__icon {
  font-size: 1.8rem;
  color: var(--ko-accent);
  margin-bottom: 12px;
}

.ko-contact-card__title {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--ko-primary);
  margin-bottom: 6px;
}

.ko-contact-card p {
  font-size: 0.9rem;
  color: var(--ko-text-muted);
  line-height: 1.7;
}

.ko-footer {
  background-color: var(--ko-primary-dark);
  color: rgba(255,255,255,0.8);
  padding-top: 50px;
}

.ko-footer__inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.12);
}

.ko-footer__brand {
  font-size: 1.1rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.ko-footer__brand i {
  color: var(--ko-accent);
}

.ko-footer__desc {
  font-size: 0.85rem;
  line-height: 1.8;
  color: rgba(255,255,255,0.65);
}

.ko-footer__heading {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--ko-accent);
  margin-bottom: 14px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.ko-footer__links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.ko-footer__links a {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.7);
  transition: color var(--ko-transition);
}

.ko-footer__links a:hover {
  color: var(--ko-accent);
}

.ko-footer__address {
  font-style: normal;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 16px;
}

.ko-footer__address p {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.7);
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.ko-footer__address i {
  color: var(--ko-accent);
  margin-top: 3px;
  flex-shrink: 0;
}

.ko-footer__address a {
  color: rgba(255,255,255,0.75);
}

.ko-footer__address a:hover {
  color: var(--ko-accent);
}

.ko-footer__legal {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.ko-footer__legal a {
  font-size: 0.78rem;
  color: rgba(255,255,255,0.55);
}

.ko-footer__legal a:hover {
  color: var(--ko-accent);
}

.ko-footer__bottom {
  background-color: rgba(0,0,0,0.2);
  padding: 16px 0;
}

.ko-footer__copy {
  font-size: 0.78rem;
  color: rgba(255,255,255,0.45);
  text-align: center;
}

.ko-prose h1 {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--ko-primary);
  margin-bottom: 20px;
}

.ko-prose h2 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--ko-primary);
  margin-top: 32px;
  margin-bottom: 12px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--ko-border);
}

.ko-prose p {
  margin-bottom: 16px;
  font-size: 0.95rem;
  line-height: 1.85;
}

.ko-prose ul {
  padding-left: 20px;
  margin-bottom: 16px;
}

.ko-prose li {
  margin-bottom: 7px;
  font-size: 0.95rem;
}

.ko-stock-table-wrap {
  overflow-x: auto;
  margin: 20px 0;
}

@media (max-width: 900px) {
  .ko-hero__inner {
    grid-template-columns: 1fr;
  }
  .ko-hero__img {
    display: none;
  }
  .ko-layout {
    grid-template-columns: 1fr;
  }
  .ko-card-grid {
    grid-template-columns: 1fr;
  }
  .ko-feature-grid {
    grid-template-columns: 1fr 1fr;
  }
  .ko-footer__inner {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .ko-contact-info {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .ko-nav-toggle {
    display: block;
  }
  .ko-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--ko-bg-white);
    border-top: 1px solid var(--ko-border);
    box-shadow: 0 8px 24px rgba(0,0,0,0.1);
    padding: 16px 20px;
  }
  .ko-nav.ko-nav--open {
    display: block;
  }
  .ko-nav__list {
    flex-direction: column;
  }
  .ko-feature-grid {
    grid-template-columns: 1fr;
  }
  .ko-hero__title {
    font-size: 1.5rem;
  }
  .ko-cookie-banner {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
}