:root {
  --ink: #14213a;
  --muted: #4b5a70;
  --navy: #101b34;
  --night: #0a1326;
  --cyan: #9af7f3;
  --paper: #f6f8fc;
  --line: #d8dfec;
  --accent: #075b70;
  --white: #fff;
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", "Meiryo", "Noto Sans JP", sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.8;
  font-size: 100%;
}
*, *::before, *::after { box-sizing: border-box; }
body { margin: 0; }
[hidden] { display: none !important; }
img, video { display: block; max-width: 100%; height: auto; }
img { color: var(--muted); }
a { color: var(--accent); text-underline-offset: .2em; }
a:hover { text-decoration-thickness: .12em; }
a, button { -webkit-tap-highlight-color: #81def044; }
a:focus-visible, button:focus-visible, summary:focus-visible, video:focus-visible { outline: 3px solid #ab3e7b; outline-offset: 4px; }
h1, h2, h3, p, figure { margin: 0; }
h1, h2, h3 { line-height: 1.36; overflow-wrap: anywhere; }
h1 { font-size: clamp(1.9rem, 4.1vw, 3.3rem); letter-spacing: -.025em; }
h2 { font-size: clamp(1.45rem, 2.8vw, 2.08rem); }
.wrap { width: min(1136px, 100% - 48px); margin-inline: auto; }
.measure { width: min(754px, 100%); margin-inline: auto; }
.skip { position: absolute; z-index: 20; inset: .5rem auto auto 1rem; transform: translateY(-180%); background: white; padding: .5rem 1rem; }
.skip:focus { transform: none; }
.site-header { background: var(--night); color: var(--white); position: relative; z-index: 2; border-bottom: 1px solid #ffffff22; }
.header-inner { min-height: 74px; display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.brand { display: flex; align-items: center; gap: .66rem; color: inherit; text-decoration: none; font-size: 1rem; font-weight: 800; line-height: 1.25; }
.brand small { display: block; color: #bfcce1; letter-spacing: .12em; font-size: .61rem; margin-top: .25rem; }
.desktop-nav { display: flex; flex-wrap: wrap; gap: .35rem 1.25rem; }
.desktop-nav a, .menu-panel a { color: #e8f2ff; font-size: .92rem; text-decoration: none; padding: .35rem 0; }
.desktop-nav a:hover, .menu-panel a:hover { color: var(--cyan); text-decoration: underline; }
.mobile-menu { display: none; }
.hero { color: white; background: radial-gradient(ellipse at 75% 45%, #28264f, transparent 64%), var(--night); }
.hero-inner { min-height: 440px; display: grid; grid-template-columns: .96fr 1.04fr; align-items: center; gap: clamp(1rem, 4vw, 3.1rem); padding-block: clamp(2.2rem, 5vw, 4.4rem); }
.eyebrow { font-size: .77rem; font-weight: 800; letter-spacing: .12em; color: var(--accent); margin-bottom: .66rem; }
.hero .eyebrow, .article-head .eyebrow { color: var(--cyan); }
.hero h1 { font-size: clamp(2rem, 5vw, 3.75rem); }
.hero p:not(.eyebrow) { color: #e0e9f8; margin-top: 1.2rem; max-width: 33rem; }
.hero-image { border-radius: 22px; width: 100%; box-shadow: 0 24px 60px #05091caa; border: 1px solid #8ea7fb45; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .65rem; margin-top: 1.45rem; }
.button { display: inline-flex; align-items: center; gap: .5rem; padding: .58rem 1rem; border-radius: 8px; text-decoration: none; font-weight: 800; background: var(--cyan); color: #0a2335; border: 1px solid transparent; }
.button:hover { background: #cefffc; }
.button.secondary { color: #f4f7ff; background: transparent; border-color: #6e819e; }
.button.secondary:hover { background: #ffffff17; }
.status { background: #e5f4f7; border-bottom: 1px solid #c7e5ea; padding: .9rem 0; font-size: .94rem; }
.status .wrap { display: flex; flex-wrap: wrap; align-items: baseline; gap: .28rem .85rem; }
.status strong { color: #07556b; }
.status a { margin-left: auto; }
.main-home { padding-block: 2.5rem 4.1rem; }
.news { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 1rem; background: white; border: 1px solid var(--line); border-left: 4px solid #8252bc; padding: .9rem 1.15rem; border-radius: 10px; margin-bottom: 2.6rem; }
.news a { display: block; font-weight: 800; }
.news small { color: var(--muted); }
.group + .group { margin-top: 3rem; }
.group-head { display: flex; justify-content: space-between; align-items: end; gap: .7rem 1.2rem; flex-wrap: wrap; margin-bottom: 1.2rem; }
.group-head p:last-child:not(.eyebrow) { color: var(--muted); font-size: .94rem; }
.cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.1rem; }
.card { display: flex; flex-direction: column; background: white; border: 1px solid var(--line); border-radius: 15px; overflow: hidden; transition: transform .22s ease, box-shadow .22s ease; }
.card:hover, .card:focus-within { transform: translateY(-3px); box-shadow: 0 9px 24px #15284b17; }
.card img { width: 100%; aspect-ratio: 3 / 2; object-fit: contain; background: var(--night); }
.card-body { padding: .95rem 1.1rem 1.2rem; flex: 1; }
.card h3 { font-size: 1.05rem; }
.card a { color: var(--ink); text-decoration: none; }
.card a:hover { text-decoration: underline; }
.card p { margin-top: .55rem; color: var(--muted); font-size: .88rem; line-height: 1.65; }
.card .arrow { color: var(--accent); padding-left: .25rem; }
.faq { margin-top: 3.3rem; background: white; border: 1px solid var(--line); border-radius: 15px; padding: clamp(1rem, 3vw, 1.8rem); }
.faq details { border-top: 1px solid var(--line); margin-top: .65rem; padding-top: .65rem; }
.faq summary { cursor: pointer; font-weight: 700; }
.faq details p { padding: .5rem 0 .2rem; }
.article-head { background: radial-gradient(ellipse at 78% 35%, #30264d, transparent 67%), var(--night); color: white; padding: 1.15rem 0 2.4rem; }
.article-head h1 { font-size: clamp(1.85rem, 3.8vw, 2.72rem); }
.crumb { color: #c9d9ed; font-size: .83rem; margin-bottom: 1.45rem; }
.crumb a { color: var(--cyan); }
.date { color: #d1d9eb; font-size: .85rem; margin-top: .9rem; }
.article-layout { max-width: 754px; margin-inline: auto; padding: 1.7rem 0 3.75rem; }
.cover { width: 100%; aspect-ratio: 3 / 2; border-radius: 16px; margin-bottom: 1.55rem; background: var(--night); }
.prose { font-size: 1.063rem; line-height: 1.92; }
.prose p + p, .prose p + ul, .prose p + ol { margin-top: .95rem; }
.prose h2 { font-size: clamp(1.35rem, 2.7vw, 1.75rem); border-left: 4px solid #208496; padding-left: .68rem; margin: 2.15rem 0 .75rem; scroll-margin-top: 1rem; }
.prose ul, .prose ol { padding-inline-start: 1.48rem; }
.prose li + li { margin-top: .45rem; }
.lede { font-weight: 650; }
.toc { margin: 1.25rem 0 1.6rem; background: white; border: 1px solid var(--line); padding: .8rem 1.05rem; border-radius: 10px; font-size: .92rem; }
.toc ul { margin: .35rem 0 0 !important; }
.prose table { width: 100%; border-collapse: collapse; margin: .7rem 0 1rem; font-size: .93rem; line-height: 1.55; }
.prose th, .prose td { text-align: left; vertical-align: top; border: 1px solid var(--line); padding: .55rem .65rem; overflow-wrap: anywhere; }
.prose thead { background: #e4edf8; }
.prose tbody { background: white; }
.prose figure { margin-block: 1.2rem; }
.prose video { background: var(--night); width: 100%; border-radius: 12px; aspect-ratio: 16 / 9; }
.prose figure img { border-radius: 10px; border: 1px solid var(--line); }
figcaption { color: var(--muted); font-size: .84rem; margin-top: .5rem; line-height: 1.6; }
.related { padding-top: 1.45rem; border-top: 1px solid var(--line); margin-top: 2.5rem; }
.related .cards { margin-top: 1rem; }
.ad { display: block; margin: 1.8rem auto; text-align: center; }
.ad:has(ins[data-ad-status="unfilled"]) { display: none; }
.ad small { color: var(--muted); font-size: .7rem; }
.site-footer { background: var(--night); color: #c9d9ed; padding: 1.4rem 0; font-size: .84rem; }
.site-footer .wrap { display: flex; justify-content: space-between; gap: .6rem 1rem; flex-wrap: wrap; }
.site-footer a { color: var(--cyan); }
.enter { animation: rise .54s ease-out both; }
@keyframes rise { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
@media (max-width: 850px) {
  .cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .hero-inner { min-height: auto; }
  .desktop-nav { display: none; }
  .mobile-menu { display: block; }
  .mobile-menu summary { list-style: none; display: grid; width: 46px; height: 46px; place-items: center; cursor: pointer; color: white; border: 1px solid #68768e; border-radius: 9px; }
  .mobile-menu summary::-webkit-details-marker { display: none; }
  .menu-panel { position: absolute; top: 100%; right: max(16px, calc((100vw - 1136px)/2)); width: min(270px, calc(100vw - 32px)); padding: .55rem 1rem; border: 1px solid #637693; border-radius: 0 0 12px 12px; background: var(--navy); box-shadow: 0 16px 32px #0b152656; }
  .menu-panel a { display: block; padding: .65rem .25rem; }
  .menu-panel a + a { border-top: 1px solid #ffffff22; }
  .mobile-menu[open] .menu-panel { animation: rise .2s ease-out both; }
}
@media (max-width: 600px) {
  .wrap { width: calc(100% - 32px); }
  .header-inner { min-height: 62px; }
  .hero-inner { grid-template-columns: 1fr; padding-block: 1.8rem; gap: 1.2rem; }
  .hero-image, .cover { border-radius: 12px; }
  .hero h1 { font-size: clamp(1.85rem, 8vw, 2.65rem); }
  .hero p:not(.eyebrow) { margin-top: .85rem; }
  .hero-actions { margin-top: 1.1rem; }
  .status a { margin-left: 0; }
  .cards { grid-template-columns: 1fr; gap: .85rem; }
  .card img { width: 100%; }
  .news { grid-template-columns: 1fr; gap: .3rem; }
  .prose th, .prose td { padding: .43rem .39rem; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}