:root {
  --theme: #2a7b9b;
  --theme-dark: #1f5d76;
  --theme-deep: #143e50;
  --theme-light: #edf7fa;
  --theme-soft: #dfeff4;
  --theme-accent: #49a1c2;
  --theme-hover: #236d89;
  --theme-border: rgba(42,123,155,.24);
  --header-bg: #1a5066;
  --header-bg-2: #256a83;
  --text-main: #17333e;
  --text-muted: #58717b;
  --on-theme: #ffffff;
  --on-header: #ffffff;
  --on-dark: #ffffff;
  --white: #ffffff;
  --shadow-soft: 0 14px 36px rgba(19,73,94,.14);
}
* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; overflow-x: hidden; overflow-y: auto; }
body { background: var(--theme-light); color: var(--text-main); font-family: Arial, Helvetica, sans-serif; line-height: 1.6; }
a { color: var(--theme-dark); }
img { max-width: 100%; }
main { min-height: 65vh; }
.container, .section-inner, .header-inner, .footer-inner, .hero-inner { width: min(1280px, calc(100% - 80px)); margin-left: auto; margin-right: auto; }
.site-header { position: sticky; top: 0; width: 100%; z-index: 9999; background: linear-gradient(180deg, var(--header-bg) 0%, var(--header-bg-2) 100%); color: var(--on-header); box-shadow: var(--shadow-soft); border-bottom: 1px solid rgba(255,255,255,.16); overflow: visible; }
.header-inner { min-height: 82px; display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 24px; overflow: visible; }
.site-logo { display: inline-flex; align-items: center; justify-content: center; flex: 0 0 auto; overflow: visible; }
.site-logo img { display: block; width: auto; height: auto; max-width: 190px; max-height: 72px; object-fit: contain; }
.main-nav { display: flex; justify-content: center; align-items: center; gap: 14px; }
.main-nav a { color: var(--on-header); text-decoration: none; white-space: nowrap; font-size: 14px; font-weight: 700; padding: 28px 0 24px; border-bottom: 2px solid transparent; }
.main-nav a.active, .main-nav a:hover { color: var(--white); border-bottom-color: var(--theme-accent); }
.header-actions { display: flex; align-items: center; justify-content: flex-end; }
.main-btn { display: inline-flex; align-items: center; justify-content: center; background: linear-gradient(180deg, var(--theme-accent) 0%, var(--theme) 48%, var(--theme-dark) 100%); color: var(--on-theme); border-radius: 999px; box-shadow: 0 10px 22px rgba(0,0,0,.18); text-decoration: none; white-space: nowrap; font-weight: 800; padding: 12px 20px; border: 1px solid rgba(255,255,255,.18); }
.main-btn:hover { background: linear-gradient(180deg, #58adca 0%, var(--theme-hover) 55%, #194b60 100%); }
.mobile-menu-toggle { display: none; border: 0; background: rgba(255,255,255,.12); border-radius: 12px; padding: 10px; flex-direction: column; justify-content: center; gap: 5px; }
.mobile-menu-toggle span { width: 22px; height: 2px; background: var(--on-header); display: block; }
.hero-section { padding: 64px 0 44px; background: linear-gradient(180deg, var(--theme-light) 0%, var(--theme-soft) 100%); }
.hero-inner { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(360px, .95fr); align-items: center; gap: 56px; }
.hero-content h1 { font-size: clamp(42px, 4.2vw, 64px); line-height: 1.08; letter-spacing: -.03em; margin: 14px 0 22px; color: var(--theme-dark); }
.hero-content p { max-width: 760px; font-size: 18px; line-height: 1.8; margin: 0 0 24px; }
.hero-badge, .hero-tags span, .tag, .badge, .category-pill { display: inline-flex; align-items: center; border-radius: 999px; padding: 9px 14px; background: var(--white); color: var(--theme-dark); border: 1px solid var(--theme-border); font-weight: 700; }
.hero-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.hero-visual, .media-box, .app-visual, .card-media { display: flex; align-items: center; justify-content: center; overflow: visible; }
.hero-media-box { width: min(100%, 540px); min-height: 320px; max-height: 420px; padding: 34px; display: flex; align-items: center; justify-content: center; overflow: visible; border-radius: 30px; background: rgba(255,255,255,.92); border: 1px solid var(--theme-border); box-shadow: var(--shadow-soft); }
.hero-media-box img { max-width: 70%; max-height: 340px; width: auto; height: auto; object-fit: contain; opacity: 1; }
.media-box img, .app-visual img, .card-media img { max-width: 100%; max-height: 100%; width: auto; height: auto; object-fit: contain; }
.section { padding: 54px 0; }
.section.alt { background: var(--theme-soft); }
.section-kicker { color: var(--theme); font-size: 13px; font-weight: 900; letter-spacing: .08em; text-transform: uppercase; margin-bottom: 8px; }
.section-title { color: var(--theme-dark); font-size: clamp(28px, 3vw, 42px); line-height: 1.2; margin: 0 0 14px; }
.section-lead { color: var(--text-muted); font-size: 17px; max-width: 900px; margin: 0 0 28px; }
.info-section { padding: 30px 0 46px; }
.info-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 20px; }
.info-card, .card, .zone-card, .feature-card, .category-card, .faq-item, .notice, .visual-card, .feedback-card { background: var(--white); color: var(--text-main); border: 1px solid var(--theme-border); box-shadow: var(--shadow-soft); border-radius: 22px; min-height: auto; height: auto; padding: 26px; }
.info-card > span, .card-number { color: var(--theme); font-weight: 900; font-size: 18px; }
.info-card h2, .card h3, .zone-card h3, .feature-card h3, .category-card h3, .faq-item h3 { color: var(--theme-dark); margin: 10px 0; line-height: 1.3; }
.info-card p, .card p, .zone-card p, .feature-card p, .category-card p, .faq-item p, .feedback-card p { color: var(--text-muted); margin-bottom: 0; }
.category-section { padding: 10px 0 48px; }
.category-pills { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; }
.category-pills a { border-radius: 999px; padding: 10px 16px; background: var(--white); color: var(--theme-dark); border: 1px solid var(--theme-border); text-decoration: none; font-weight: 800; }
.category-pills a:hover { background: var(--theme); color: var(--on-theme); }
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 22px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 20px; }
.grid-8 { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 18px; }
.split-section { display: grid; grid-template-columns: minmax(0, 1fr) minmax(340px, .8fr); gap: 42px; align-items: center; }
.split-section.reverse { grid-template-columns: minmax(340px, .8fr) minmax(0,1fr); }
.text-panel p { margin-top: 0; margin-bottom: 16px; }
.text-panel ul, .notice ul { padding-left: 20px; }
.text-panel li, .notice li { margin: 8px 0; }
.media-box { min-height: 280px; padding: 24px; background: var(--white); border: 1px solid var(--theme-border); border-radius: 26px; box-shadow: var(--shadow-soft); }
.media-box img { max-height: 320px; }
.page-hero { padding: 52px 0; background: linear-gradient(180deg, var(--theme-soft), var(--theme-light)); }
.page-hero-inner { display: grid; grid-template-columns: minmax(0,1.12fr) minmax(300px,.88fr); gap: 42px; align-items: center; }
.page-hero h1 { color: var(--theme-dark); font-size: clamp(38px, 4vw, 58px); line-height: 1.08; margin: 12px 0 18px; }
.page-hero p { font-size: 18px; line-height: 1.8; }
.page-hero .media-box { min-height: 300px; }
.page-hero .media-box img { max-height: 280px; }
.article-copy { max-width: 1020px; }
.article-copy p { font-size: 16.5px; line-height: 1.85; margin: 0 0 18px; }
.article-copy h2 { color: var(--theme-dark); font-size: clamp(26px,2.6vw,36px); margin: 38px 0 14px; }
.entity-list { display: flex; flex-wrap: wrap; gap: 8px; margin: 20px 0; }
.entity-list span { background: var(--theme-soft); border: 1px solid var(--theme-border); color: var(--theme-dark); border-radius: 999px; padding: 8px 12px; font-weight: 700; }
.content-points { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 18px; margin: 24px 0; }
.content-point { background: var(--white); border-left: 4px solid var(--theme); border-radius: 16px; padding: 20px; box-shadow: var(--shadow-soft); }
.content-point h3 { margin: 0 0 8px; color: var(--theme-dark); }
.feedback-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 18px; margin-top: 22px; }
.feedback-card strong { display: block; color: var(--theme-dark); margin-bottom: 8px; }
.faq-list { display: grid; gap: 14px; }
.faq-item { padding: 22px; }
.notice { background: linear-gradient(180deg, var(--white), var(--theme-soft)); border-left: 5px solid var(--theme); }
.related-nav { display: flex; flex-wrap: wrap; gap: 10px; }
.related-nav a { text-decoration: none; background: var(--white); border: 1px solid var(--theme-border); border-radius: 999px; padding: 9px 14px; font-weight: 800; }
.link-arrow { display: inline-flex; margin-top: 14px; font-weight: 800; text-decoration: none; }
.footer { background: var(--theme-deep); color: var(--on-dark); padding: 52px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 1.7fr 1fr 1fr 1.2fr; gap: 34px; }
.footer h2 { font-size: 17px; margin: 0 0 14px; color: var(--white); }
.footer a { display: block; color: var(--on-dark); text-decoration: none; margin: 8px 0; opacity: .9; }
.footer a:hover { opacity: 1; text-decoration: underline; }
.footer-brand img { max-width: 180px; max-height: 70px; width: auto; height: auto; object-fit: contain; margin-bottom: 14px; }
.footer-brand p, .footer-legal p { color: rgba(255,255,255,.82); }
.footer-legal { margin-top: 32px; padding-top: 24px; border-top: 1px solid rgba(255,255,255,.16); font-size: 14px; }
.mobile-drawer { position: fixed; top: 0; left: 0; width: 82%; max-width: 320px; height: 100vh; transform: translateX(-100%); transition: transform .28s ease; z-index: 10001; background: linear-gradient(180deg, var(--header-bg), var(--header-bg-2)); color: var(--on-header); padding: 20px; box-shadow: 16px 0 40px rgba(0,0,0,.22); }
.mobile-drawer.is-open { transform: translateX(0); }
.drawer-overlay { position: fixed; inset: 0; background: rgba(10,35,45,.48); opacity: 0; visibility: hidden; transition: opacity .28s ease; z-index: 10000; }
.drawer-overlay.is-open { opacity: 1; visibility: visible; }
body.menu-open { overflow: hidden; }
.drawer-top { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.drawer-logo img { max-width: 150px; max-height: 58px; object-fit: contain; }
.drawer-close { width: 42px; height: 42px; border: 1px solid rgba(255,255,255,.22); border-radius: 12px; background: rgba(255,255,255,.1); color: var(--white); font-size: 28px; }
.drawer-nav { display: grid; gap: 6px; margin-top: 26px; }
.drawer-nav a { color: var(--on-header); text-decoration: none; padding: 11px 12px; border-radius: 12px; }
.drawer-nav a.active, .drawer-nav a:hover { background: rgba(255,255,255,.13); }
.drawer-note { margin-top: 22px; padding: 14px; border-radius: 14px; background: rgba(255,255,255,.1); font-size: 13px; line-height: 1.6; }
@media (min-width: 1440px) { .container, .section-inner, .header-inner, .footer-inner, .hero-inner { width: min(1360px, calc(100% - 120px)); } .hero-inner { grid-template-columns: minmax(0, 1.05fr) minmax(480px, .95fr); gap: 72px; } .hero-media-box { max-width: 560px; min-height: 360px; } }
@media (max-width: 1180px) and (min-width: 1024px) { .main-nav { gap: 10px; } .main-nav a { font-size: 12.5px; } .site-logo img { max-width: 155px; } .header-inner { gap: 14px; } }
@media (max-width: 1023px) { .header-inner { width: min(100% - 28px, 1280px); min-height: 68px; grid-template-columns: 48px minmax(0,1fr) auto; gap: 10px; } .mobile-menu-toggle { display: inline-flex; width: 44px; height: 44px; } .main-nav { display: none; } .site-logo { justify-self: center; } .site-logo img { max-width: min(150px,42vw); max-height: 56px; } .header-actions { justify-self: end; } .header-actions .main-btn { padding: 10px 16px; font-size: 13px; } .hero-section { padding: 46px 0 34px; } .hero-inner, .page-hero-inner, .split-section, .split-section.reverse { grid-template-columns: 1fr; gap: 30px; } .hero-content h1 { font-size: clamp(36px,8vw,52px); } .hero-media-box { max-width: 100%; min-height: auto; padding: 24px; } .hero-media-box img { max-height: 300px; } .info-grid { grid-template-columns: repeat(2,minmax(0,1fr)); } .grid-4, .grid-8 { grid-template-columns: repeat(2,minmax(0,1fr)); } .grid-3 { grid-template-columns: repeat(2,minmax(0,1fr)); } .footer-grid { grid-template-columns: repeat(2,minmax(0,1fr)); } }
@media (max-width: 767px) { .container, .section-inner, .header-inner, .footer-inner, .hero-inner { width: min(100% - 32px,1280px); } .section { padding: 42px 0; } .info-grid, .grid-2, .grid-3, .grid-4, .grid-8, .content-points, .feedback-grid, .footer-grid { grid-template-columns: 1fr; } .hero-content p, .page-hero p { font-size: 16px; } .page-hero { padding: 40px 0; } .page-hero h1 { font-size: clamp(34px,10vw,46px); } .media-box, .page-hero .media-box { min-height: 220px; } .category-pills { justify-content: flex-start; } }
@media (max-width: 390px) { .header-inner { width: min(100% - 20px,1280px); grid-template-columns: 44px minmax(0,1fr) auto; gap: 8px; } .site-logo img { max-width: min(120px,36vw); max-height: 48px; } .header-actions .main-btn { padding: 8px 11px; font-size: 12px; } }

/* MOBILE_FIX_TYPE_A_20260930: restore mobile menu icon + narrow-screen hardening */
@media (max-width: 1023px) {
  html, body { width: 100%; max-width: 100%; overflow-x: clip; }
  .header-inner, .header-inner > *, .hero-inner > *, .page-hero-inner > *, .split > * { min-width: 0; }
  .mobile-menu-toggle {
    display: inline-flex !important;
    flex-direction: column !important;
    align-items: center !important;
    justify-content: center !important;
    gap: 4px !important;
    width: 44px !important;
    height: 44px !important;
    min-width: 44px !important;
    padding: 8px !important;
    position: relative;
    z-index: 2;
    opacity: 1 !important;
    visibility: visible !important;
    color: var(--on-header, #fff) !important;
    -webkit-appearance: none;
    appearance: none;
  }
  .mobile-menu-toggle span {
    display: block !important;
    flex: 0 0 2px !important;
    width: 24px !important;
    height: 2px !important;
    min-height: 2px !important;
    margin: 0 !important;
    padding: 0 !important;
    border: 0 !important;
    border-radius: 3px !important;
    background: var(--on-header, #fff) !important;
    opacity: 1 !important;
    visibility: visible !important;
  }
}
@media (max-width: 390px) {
  .header-inner { width: calc(100% - 16px) !important; gap: 6px !important; }
  .site-logo { min-width: 0; overflow: hidden; }
  .site-logo img { max-width: min(116px, 35vw) !important; }
  .header-actions .main-btn { max-width: 94px; min-width: 0; padding-inline: 8px !important; }
}