:root {
    --color-primary: #1A73E8;
    --color-primary-light: #E3F2FD;
    --color-bg: #FFFFFF;
    --color-bg-soft: #F7F9FC;
    --color-text: #1F2933;
    --color-muted: #6B7B8C;
    --color-border: #E0E7F1;
    --radius-base: 12px;
    --shadow-soft: 0 12px 30px rgba(15, 23, 42, 0.08);
    --shadow-card: 0 8px 20px rgba(15, 23, 42, 0.06);

    /* 互換性用（base.css との共通変数） */
    --accent: #0ea5e9;
    --accent-dark: #0284c7;
    --fg: #111;
    --bg: #fff;
    --muted: #666;
    --line: #e5e7eb;
  }
  
  *,
  *::before,
  *::after {
    box-sizing: border-box;
  }
  
  html {
    overflow-y: scroll; /* 常にスクロールバー領域を確保し、ページ間のずれを防止 */
  }

  body {
    margin: 0;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", sans-serif;
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.6;
  }
  
  /* Utility */
  .container {
    width: 100%;
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 24px;
  }
  
  .section {
    padding: 80px 0;
  }
  
  .section-header {
    text-align: center;
    margin-bottom: 40px;
  }
  
  .section-title {
    font-size: 28px;
    font-weight: 700;
    margin: 0 0 8px;
  }
  
  .section-subtitle {
    font-size: 15px;
    color: var(--color-muted);
    margin: 0;
  }
  
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 24px;
    border-radius: 999px;
    text-decoration: none;
    font-size: 15px;
    font-weight: 600;
    border: 1px solid transparent;
    cursor: pointer;
    transition: background-color 0.18s ease, color 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease, transform 0.08s ease;
  }
  
  .btn-primary {
    background-color: var(--color-primary);
    color: #fff;
    box-shadow: var(--shadow-soft);
  }
  
  .btn-primary:hover {
    background-color: #1558b0;
    transform: translateY(-1px);
  }
  
  .btn-outline {
    background-color: #fff;
    color: var(--color-primary);
    border-color: var(--color-primary);
  }
  
  .btn-outline:hover {
    background-color: var(--color-primary-light);
  }
  
  /* Toast Notification */
  .toast-notification {
    position: fixed;
    top: 80px;
    left: 50%;
    transform: translateX(-50%);
    background-color: #fff;
    border: 1px solid #E0E7F1;
    border-radius: 12px;
    padding: 16px 24px;
    box-shadow: 0 8px 24px rgba(15, 23, 42, 0.15);
    z-index: 1000;
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 300px;
    max-width: 500px;
    opacity: 0;
    transform: translateX(-50%) translateY(-20px);
    transition: opacity 0.3s ease, transform 0.3s ease;
    pointer-events: none;
  }
  
  .toast-notification.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
    pointer-events: auto;
  }
  
  .toast-notification.info {
    border-left: 4px solid #2196F3;
    background-color: #E3F2FD;
    color: #1565C0;
  }
  
  .toast-notification.success {
    border-left: 4px solid #4CAF50;
    background-color: #E8F5E9;
    color: #2E7D32;
  }
  
  .toast-notification.error {
    border-left: 4px solid #F44336;
    background-color: #FFEBEE;
    color: #C62828;
  }
  
  .toast-message {
    flex: 1;
    font-size: 14px;
    font-weight: 500;
    margin: 0;
  }
  
  .toast-close {
    background: none;
    border: none;
    font-size: 20px;
    color: inherit;
    opacity: 0.6;
    cursor: pointer;
    padding: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
  }
  
  .toast-close:hover {
    opacity: 1;
  }
  
  @media (max-width: 720px) {
    .toast-notification {
      top: 70px;
      left: 16px;
      right: 16px;
      transform: translateX(0) translateY(-20px);
      min-width: auto;
      max-width: none;
    }
    
    .toast-notification.show {
      transform: translateX(0) translateY(0);
    }
  }
  
  /* Header */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(226, 232, 240, 0.8);
    padding: 8px 0;
  }
  
  /* Header only: reduce left padding so logo sits closer to the edge */
  .site-header .container {
    padding-left: 6px;
    padding-right: 24px;
  }
  
  .header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
  }
  
  .logo-area {
    display: flex;
    align-items: center;
    gap: 6px;
  }
  
.logo-mark {
    width: 150px;
    height: auto;
    display: block;
    border-radius: 0;
    object-fit: contain;
    max-height: 48px;
  }
  
  .logo-text {
    display: flex;
    flex-direction: column;
  }
  
  .logo-main {
    font-weight: 700;
    font-size: 16px;
  }
  
  .logo-sub {
    font-size: 11px;
    color: var(--color-muted);
  }
  
  .global-nav ul {
    display: flex;
    align-items: center;
    gap: 16px;
    list-style: none;
    margin: 0;
    padding: 0;
  }

  .global-nav li {
    display: flex;
    align-items: center;
  }
  
  .global-nav a {
    text-decoration: none;
    font-size: 14px;
    color: var(--color-text);
    padding: 4px 2px;
    position: relative;
    white-space: nowrap;
  }
  
  .global-nav a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -4px;
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: width 0.16s ease;
  }
  
  .global-nav a:hover::after {
    width: 100%;
  }

  /* カート・ログインボタンのスタイル */
  .nav-button {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.2s ease;
    position: relative;
    white-space: nowrap;
    font-size: 14px;
    line-height: 1.5;
  }

  .nav-button::after {
    display: none; /* 下線エフェクトを無効化 */
  }

  .nav-icon {
    flex-shrink: 0;
  }

  /* カートボタン */
  .cart-button {
    background-color: #0ea5e9;
    color: #fff;
    border: 1px solid #0ea5e9;
  }

  .cart-button:hover {
    background-color: #0284c7;
    border-color: #0284c7;
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(14, 165, 233, 0.2);
  }

  /* ログインボタン */
  .login-button {
    background-color: #fbbf24;
    color: #fff;
    border: 1px solid #fbbf24;
  }

  .login-button:hover {
    background-color: #f59e0b;
    border-color: #f59e0b;
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(251, 191, 36, 0.2);
  }

  /* ログアウトボタン */
  .logout-button {
    background-color: #f3f4f6;
    color: var(--color-text);
    border: 1px solid #e5e7eb;
  }

  .logout-button:hover {
    background-color: #e5e7eb;
    border-color: #d1d5db;
    color: var(--color-text);
    transform: translateY(-1px);
  }

  /* カートバッジの調整 */
  .cart-button .cart-badge {
    position: static;
    margin-left: 4px;
    background: rgba(255, 255, 255, 0.3);
    color: #fff;
    border-radius: 10px;
    padding: 2px 6px;
    font-size: 11px;
    font-weight: 700;
    min-width: 18px;
    text-align: center;
  }

  .cart-button:hover .cart-badge {
    background: rgba(255, 255, 255, 0.4);
  }
  
  .header-search {
    margin-left: 16px;
  }
  
  .header-search-button {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: 999px;
    border: 1px solid var(--color-border);
    background-color: #fff;
    cursor: pointer;
    font-size: 13px;
    color: var(--color-muted);
  }
  
  .header-search-button:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
  }
  
  .search-icon {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    border: 2px solid currentColor;
    position: relative;
  }
  
  .search-icon::after {
    content: "";
    position: absolute;
    width: 8px;
    height: 2px;
    background-color: currentColor;
    transform: rotate(45deg);
    right: -4px;
    bottom: -1px;
  }
  
  /* Mobile nav toggle */
  .nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    padding: 4px;
    cursor: pointer;
  }
  
  .nav-toggle span {
    width: 20px;
    height: 2px;
    background-color: var(--color-text);
  }
  
  /* Hero */
  .hero {
    position: relative;
    padding: 72px 0 80px;
    background: radial-gradient(circle at 0% 0%, #E3F2FD 0%, #FFFFFF 45%, #EAF1FC 100%);
    overflow: hidden;
  }
  
  .hero-overlay {
    position: absolute;
    inset: 0;
    opacity: 0.1;
    pointer-events: none;
  }
  
  .hero-inner {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    gap: 40px;
    align-items: center;
  }
  
  .hero-content {
    max-width: 580px;
  }
  
  .hero-tagline {
    font-size: 12px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-primary);
    font-weight: 600;
    margin: 0 0 12px;
  }
  
  .hero-title {
    font-size: 30px;
    line-height: 1.3;
    margin: 0 0 16px;
  }
  
  .hero-subtext {
    font-size: 15px;
    color: var(--color-muted);
    margin: 0 0 24px;
  }
  
  .hero-search-form {
    display: grid;
    grid-template-columns: 2fr 1.2fr auto;
    gap: 8px;
    background-color: #fff;
    border-radius: 999px;
    padding: 4px;
    box-shadow: var(--shadow-soft);
    margin-bottom: 20px;
  }
  
  .hero-search-keyword input,
  .hero-search-category select {
    width: 100%;
    height: 40px;
    border-radius: 999px;
    border: none;
    padding: 0 14px;
    font-size: 14px;
    outline: none;
    background-color: transparent;
  }
  
  .hero-search-category select {
    border-left: 1px solid var(--color-border);
  }
  
  .hero-search-submit {
    height: 40px;
    padding: 0 20px;
    border-radius: 999px;
    border: none;
    background-color: var(--color-primary);
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
  }
  
  .hero-search-submit:hover {
    background-color: #1558b0;
  }
  
  .hero-cta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 8px;
  }
  
  .hero-link a {
    font-size: 13px;
    color: var(--color-primary);
    text-decoration: none;
  }
  
  .hero-link a:hover {
    text-decoration: underline;
  }
  
  /* Hero Visual */
  .hero-visual {
    justify-self: center;
  }
  
  .hero-visual-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }
  
  .hero-visual-item {
    width: 100%;
    padding-top: 70%;
    border-radius: 18px;
    box-shadow: var(--shadow-card);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
  }
  
  /* Hero Visual 背景画像 */
  /* hero-visual-a: MR00-X0301-1.jpg */
  .hero-visual-a {
    background-image: url('../images/MR00-X0301-1.jpg');
  }
  /* hero-visual-b: MFR0351-MFP0150_R.jpg */
  .hero-visual-b {
    background-image: url('../images/MFR0351-MFP0150_R.jpg');
  }
  /* hero-visual-c: TI00-X0406c2.jpg */
  .hero-visual-c {
    background-image: url('../images/TI00-X0406c2.jpg');
  }
  /* hero-visual-d: VKS0104b.jpg */
  .hero-visual-d {
    background-image: url('../images/VKS0104b.jpg');
  }
  
  .hero-visual-caption {
    font-size: 12px;
    color: var(--color-muted);
    margin-top: 10px;
  }
  
  /* Categories */
  .section-categories {
    background-color: #fff;
  }
  
  .category-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }
  
  .category-card {
    border-radius: 18px;
    background-color: #fff;
    box-shadow: var(--shadow-card);
    padding: 0;
    display: flex;
    flex-direction: column;
    transition: transform 0.18s ease, box-shadow 0.18s ease;
  }

  .category-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 28px rgba(15, 23, 42, 0.12);
  }

  .category-link {
    display: flex;
    flex-direction: column;
    padding: 16px 16px 18px;
    text-decoration: none;
    color: inherit;
    height: 100%;
  }

  .category-link:hover {
    text-decoration: none;
  }
  
  .category-thumb {
    border-radius: 14px;
    height: 140px;
    margin-bottom: 14px;
    background: linear-gradient(135deg, #E3F2FD, #FFFFFF);
    background-size: contain;
    background-position: center;
    background-repeat: no-repeat;
  }
  
  /* Category Thumb 背景画像 */
  /* category-thumb-anatomy: UD00-Y0201b2.jpg（解剖学） */
  .category-thumb-anatomy {
    background-image: url('../images/UD00-Y0201b2.jpg');
  }
  /* category-thumb-conditions: FMK0101X4-2d.jpg（病気・症状） */
  .category-thumb-conditions {
    background-image: url('../images/FMK0101X4-2d.jpg');
  }
  /* category-thumb-exams: IGC0201-CL.PNG（アセスメント・検査） */
  .category-thumb-exams {
    background-image: url('../images/IGC0201-CL.PNG');
  }
  /* category-thumb-procedures: NZO0218G.jpg（治療・処置・手術手技） */
  .category-thumb-procedures {
    background-image: url('../images/NZO0218G.jpg');
  }
  /* category-thumb-devices: AD80101-CL.png（医療器具・各種用具） */
  .category-thumb-devices {
    background-image: url('../images/AD80101-CL.png');
  }
  /* category-thumb-scenes: CGK0112b.png（看護・介護） */
  .category-thumb-scenes {
    background-image: url('../images/CGK0112b.png');
  }
  
  .category-title {
    font-size: 16px;
    margin: 0 0 6px;
  }
  
  .category-desc {
    font-size: 13px;
    color: var(--color-muted);
    margin: 0;
  }
  
  /* New / Trending */
  .section-illustrations {
    background-color: var(--color-bg-soft);
  }
  
  .illustration-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px;
  }
  
  .illustration-card {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    background-color: #fff;
    box-shadow: var(--shadow-card);
    display: flex;
    flex-direction: column;
  }

  .illustration-card a {
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    height: 100%;
  }
  
  .illustration-thumb {
    padding-top: 72%;
    background-color: #F7F9FC;
    background-size: contain;
    background-position: center;
    background-repeat: no-repeat;
  }
  
  .illustration-meta {
    padding: 10px 14px 12px;
  }
  
  .illustration-title {
    font-size: 14px;
    font-weight: 600;
    margin: 0 0 4px;
  }
  
  .illustration-info {
    font-size: 12px;
    color: var(--color-muted);
    margin: 0 0 4px;
  }
  
  .illustration-price {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-primary);
    margin: 0;
  }
  
  .illustration-hover {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(15, 23, 42, 0.6), transparent 40%);
    opacity: 0;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding-bottom: 16px;
    color: #fff;
    font-size: 13px;
    font-weight: 600;
    transition: opacity 0.18s ease;
  }
  
  .illustration-card:hover .illustration-hover {
    opacity: 1;
  }
  
  .section-actions {
    text-align: center;
    margin-top: 32px;
  }
  
  /* Usage Scenes */
  .section-usage {
    background-color: #fff;
  }
  
  .usage-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px;
  }
  
  .usage-card {
    border-radius: 16px;
    padding: 16px 18px;
    background-color: #F9FBFF;
    border: 1px solid #E5ECF5;
  }
  
  .usage-title {
    font-size: 15px;
    font-weight: 600;
    margin: 0 0 8px;
  }
  
  .usage-text {
    font-size: 13px;
    color: var(--color-muted);
    margin: 0;
  }
  
  /* Pricing */
  .section-pricing {
    background-color: var(--color-bg-soft);
  }
  
  .pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }
  
  .pricing-card {
    border-radius: 18px;
    background-color: #fff;
    padding: 20px 18px 22px;
    box-shadow: var(--shadow-card);
    border: 1px solid transparent;
  }
  
  .pricing-card-highlight {
    border-color: var(--color-primary);
    transform: translateY(-4px);
  }
  
  .pricing-title {
    font-size: 18px;
    margin: 0 0 4px;
  }
  
  .pricing-label {
    font-size: 13px;
    color: var(--color-muted);
    margin: 0 0 10px;
  }
  
  .pricing-price {
    font-size: 18px;
    font-weight: 700;
    margin: 0 0 10px;
    color: var(--color-primary);
  }
  
  .pricing-list {
    list-style: none;
    padding: 0;
    margin: 0;
    font-size: 13px;
    color: var(--color-muted);
  }
  
  .pricing-list li + li {
    margin-top: 4px;
  }
  
  /* Custom Illustration */
  .section-custom {
    background-color: #fff;
  }
  
  .custom-inner {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.2fr);
    gap: 32px;
    align-items: center;
  }
  
  .custom-visual {
    border-radius: 24px;
    min-height: 260px;
    background: radial-gradient(circle at 20% 20%, #E3F2FD 0%, #1A73E8 40%, #0F4AA0 100%);
    background-image: url('../images/TI00-W0202c-edit.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    box-shadow: var(--shadow-soft);
  }
  
  .custom-list {
    list-style: none;
    padding: 0;
    margin: 16px 0 20px;
    font-size: 14px;
    color: var(--color-muted);
  }
  
  .custom-list li {
    padding-left: 20px;
    position: relative;
  }
  
  .custom-list li::before {
    content: "•";
    position: absolute;
    left: 4px;
    color: var(--color-primary);
  }
  
  /* Testimonials */
  .section-testimonials {
    background-color: #fff;
  }
  
  .testimonial-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }
  
  .testimonial-card {
    border-radius: 18px;
    padding: 18px 18px 20px;
    background-color: #F9FBFF;
    border: 1px solid #E5ECF5;
  }
  
  .testimonial-text {
    font-size: 13px;
    margin: 0 0 8px;
  }
  
  .testimonial-meta {
    font-size: 12px;
    color: var(--color-muted);
    margin: 0;
  }
  
  /* Usage Guide */
  .section-usage-guide {
    background-color: var(--color-bg-soft);
  }

  .guide-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }

  .guide-card {
    border-radius: 18px;
    padding: 20px 18px 22px;
    background-color: #fff;
    box-shadow: var(--shadow-card);
    border: 1px solid transparent;
  }

  .guide-card-title {
    font-size: 18px;
    font-weight: 700;
    margin: 0 0 16px;
    color: var(--color-primary);
    border-bottom: 2px solid var(--color-primary-light);
    padding-bottom: 8px;
  }

  .guide-content {
    margin: 0;
  }

  .guide-subtitle {
    font-size: 14px;
    font-weight: 600;
    margin: 16px 0 8px;
    color: var(--color-text);
  }

  .guide-subtitle:first-child {
    margin-top: 0;
  }

  .guide-list {
    margin: 8px 0 16px;
    padding-left: 22px;
    font-size: 13px;
    line-height: 1.8;
    color: var(--color-muted);
  }

  .guide-list li {
    margin-bottom: 6px;
  }

  .guide-list li:last-child {
    margin-bottom: 0;
  }

  /* FAQ */
  .section-faq {
    background-color: var(--color-bg-soft);
  }
  
  .faq-list {
    max-width: 720px;
    margin: 0 auto;
  }
  
  .faq-item {
    border-radius: 12px;
    border: 1px solid #E0E7F1;
    background-color: #fff;
    padding: 10px 14px;
    font-size: 14px;
  }
  
  .faq-item + .faq-item {
    margin-top: 8px;
  }
  
  .faq-item summary {
    cursor: pointer;
    list-style: none;
    font-weight: 600;
  }
  
  .faq-item summary::-webkit-details-marker {
    display: none;
  }
  
  /* Contact */
  .section-contact {
    background-color: #fff;
  }
  
  .contact-form {
    max-width: 640px;
    margin: 0 auto;
  }
  
  .form-row {
    display: flex;
    flex-direction: column;
    margin-bottom: 14px;
  }
  
  .form-row label {
    font-size: 14px;
    margin-bottom: 4px;
  }
  
  .form-row input,
  .form-row textarea {
    border-radius: 12px;
    border: 1px solid #CDD5E1;
    padding: 8px 10px;
    font-size: 14px;
    font-family: inherit;
  }
  
  .form-row input:focus,
  .form-row textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 1px rgba(26, 115, 232, 0.2);
  }
  
  .form-actions {
    text-align: right;
    margin-top: 10px;
  }
  
  /* Login placeholder */
  .section-login {
    background-color: var(--color-bg-soft);
  }
  
  /* Footer */
  .site-footer {
    background-color: #0B1726;
    color: #D1D5DB;
    padding: 26px 0;
  }
  
  .footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
  }
  
  .footer-logo {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 4px;
  }
  
  .footer-copy {
    font-size: 11px;
    margin: 0;
  }
  
  .footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
  }
  
  .footer-links a {
    color: #E5E7EB;
    font-size: 12px;
    text-decoration: none;
  }
  
  .footer-links a:hover {
    text-decoration: underline;
  }
  
  /* ================= Responsive ================= */
  @media (max-width: 960px) {
    .hero-inner {
      grid-template-columns: 1fr;
    }
  
    .hero {
      padding-top: 64px;
    }
  
    .hero-content {
      order: 1;
    }
  
    .hero-visual {
      order: 2;
    }
  
    .category-grid {
      grid-template-columns: repeat(2, minmax(0, 1fr));
    }
  
    .illustration-grid {
      grid-template-columns: repeat(2, minmax(0, 1fr));
    }
  
    .usage-grid {
      grid-template-columns: repeat(2, minmax(0, 1fr));
    }
  
    .pricing-grid {
      grid-template-columns: 1fr;
    }
  
    .testimonial-grid {
      grid-template-columns: 1fr;
    }

    .guide-grid {
      grid-template-columns: 1fr;
    }
  
    .custom-inner {
      grid-template-columns: 1fr;
    }
  }
  
  @media (max-width: 720px) {
    .header-inner {
      height: 64px;
    }
  
    .global-nav {
      position: absolute;
      inset: 64px 0 auto;
      background-color: #fff;
      border-bottom: 1px solid #E5E7EB;
      padding: 10px 24px 14px;
      display: none;
    }
  
    .global-nav.open {
      display: block;
    }
  
    .global-nav ul {
      flex-direction: column;
      align-items: flex-start;
      gap: 8px;
    }

    .nav-button {
      width: 100%;
      justify-content: center;
      padding: 10px 16px;
    }
  
    .header-search {
      display: none;
    }
  
    .nav-toggle {
      display: flex;
    }
  
    .hero-search-form {
      grid-template-columns: 1fr;
      border-radius: 20px;
    }
  
    .category-grid {
      grid-template-columns: 1fr;
    }
  
    .illustration-grid {
      grid-template-columns: 1fr;
    }
  
    .usage-grid {
      grid-template-columns: 1fr;
    }
  
    .section {
      padding: 56px 0;
    }
  
    .section-title {
      font-size: 22px;
    }
  
    .footer-inner {
      flex-direction: column;
      align-items: flex-start;
    }
  }

/* ▼ Hero検索フォームの2本立てレイアウト */

.hero-search-category-block,
.hero-search-keyword-block {
  margin-bottom: 14px;
}

.hero-search-category,
.hero-search-keyword {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
  padding: 8px;
  background: #fff;
  border-radius: 12px;
  box-shadow: var(--shadow-soft);
}

.hero-search-category-select select,
.hero-search-keyword-input input {
  width: 100%;
  height: 42px;
  border-radius: 10px;
  border: 1px solid var(--color-border);
  padding: 0 12px;
  font-size: 14px;
}

.hero-search-submit {
  height: 42px;
  padding: 0 18px;
  border-radius: 10px;
  background-color: var(--color-primary);
  color: #fff;
  border: none;
  cursor: pointer;
  font-weight: 600;
}

.hero-search-submit:hover {
  background-color: #1558b0;
}