:root {
  --forest: #376f58;
  --forest-deep: #244b3d;
  --forest-soft: #eaf3e6;
  --lime: #d9e985;
  --cream: #f7f8ee;
  --paper: #fffef9;
  --ink: #254a3d;
  --muted: #61756c;
  --line: #dbe7de;
  --warm: #e9a96d;
  --white: #fff;
  --shadow: 0 18px 50px rgba(46, 94, 75, .12);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: "Hiragino Sans", "Yu Gothic", "Meiryo", system-ui, -apple-system, sans-serif; line-height: 1.85; -webkit-font-smoothing: antialiased; }
img { display: block; max-width: 100%; }
a { color: var(--forest); text-underline-offset: .2em; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { color: var(--forest-deep); line-height: 1.4; letter-spacing: -.025em; }
h1 { margin-bottom: 22px; font-size: clamp(2.15rem, 5vw, 4.25rem); }
h2 { margin: 76px 0 24px; padding-bottom: 14px; border-bottom: 3px solid var(--lime); font-size: clamp(1.65rem, 3vw, 2.35rem); }
h3 { margin: 38px 0 13px; font-size: 1.28rem; }
.container { width: min(1120px, calc(100% - 40px)); margin-inline: auto; }
.article-width { width: min(780px, calc(100% - 40px)); margin-inline: auto; }
.skip-link { position: absolute; top: -80px; left: 16px; z-index: 100; padding: 10px 16px; color: var(--white); background: var(--forest); border-radius: 8px; }
.skip-link:focus { top: 16px; }
.disclosure-bar { padding: 8px 18px; color: #345446; background: #eff5d6; text-align: center; font-size: .76rem; font-weight: 700; }
.site-header { position: sticky; top: 0; z-index: 30; background: rgba(255,254,249,.96); border-bottom: 1px solid var(--line); backdrop-filter: blur(12px); }
.nav { display: flex; min-height: 68px; align-items: center; justify-content: space-between; gap: 24px; }
.brand { color: var(--forest-deep); font-weight: 900; text-decoration: none; letter-spacing: .02em; }
.brand small { display: block; color: var(--muted); font-size: .62rem; font-weight: 700; letter-spacing: .08em; }
.nav-links { display: flex; align-items: center; gap: 24px; }
.nav-links a { font-size: .84rem; font-weight: 800; text-decoration: none; }
.nav-cta { padding: 9px 16px; color: var(--white) !important; background: var(--forest); border-radius: 999px; }
.breadcrumb { padding: 17px 0; color: var(--muted); font-size: .75rem; }
.breadcrumb ol { display: flex; padding: 0; margin: 0; flex-wrap: wrap; gap: 8px; list-style: none; }
.breadcrumb li:not(:last-child)::after { margin-left: 8px; content: "/"; color: #a6b4ad; }
.article-hero { padding: 46px 0 68px; background: linear-gradient(145deg, #f8faed 0%, #edf5ea 100%); }
.article-label { display: inline-flex; margin-bottom: 18px; padding: 6px 12px; color: var(--forest); background: var(--lime); border-radius: 999px; font-size: .74rem; font-weight: 900; letter-spacing: .08em; }
.article-lead { max-width: 760px; margin-bottom: 24px; color: var(--muted); font-size: 1.08rem; }
.article-meta { display: flex; color: var(--muted); flex-wrap: wrap; gap: 8px 18px; font-size: .78rem; }
.hero-image { width: min(1120px, calc(100% - 40px)); margin: -30px auto 0; overflow: hidden; background: #e7eee5; border: 8px solid var(--white); border-radius: 28px; box-shadow: var(--shadow); }
.hero-image img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
.image-caption { padding: 7px 14px; margin: 0; color: var(--muted); background: var(--white); font-size: .68rem; text-align: right; }
.article-body { padding: 68px 0 100px; }
.article-body p, .article-body li { font-size: 1rem; }
.article-body p { margin-bottom: 24px; }
.answer-box, .toc, .warning-box, .note-box { margin: 34px 0; padding: 26px 28px; border-radius: 18px; }
.answer-box { background: var(--forest-soft); border: 2px solid #bbd4c1; }
.answer-box strong { display: block; margin-bottom: 10px; color: var(--forest-deep); font-size: 1.14rem; }
.answer-box ul, .toc ol, .check-list { margin: 0; padding-left: 1.3em; }
.answer-box li + li, .toc li + li, .check-list li + li { margin-top: 7px; }
.toc { background: var(--cream); border: 1px solid var(--line); }
.toc strong { display: block; margin-bottom: 12px; }
.toc a { text-decoration: none; }
.warning-box { background: #fff4ea; border-left: 5px solid var(--warm); }
.warning-box strong { display: block; margin-bottom: 8px; color: #7b4b25; }
.note-box { background: #f8faf6; border: 1px solid var(--line); }
.comparison-wrap { margin: 32px 0; overflow-x: auto; border: 1px solid var(--line); border-radius: 16px; }
.comparison { width: 100%; min-width: 620px; border-collapse: collapse; background: var(--white); }
.comparison th, .comparison td { padding: 15px 17px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.comparison th { color: var(--forest-deep); background: #edf5ea; font-size: .86rem; }
.comparison tr:last-child td { border-bottom: 0; }
.number-list { padding: 0; margin: 34px 0; counter-reset: select; list-style: none; }
.number-list li { position: relative; min-height: 48px; padding: 0 0 24px 62px; }
.number-list li::before { position: absolute; top: 0; left: 0; display: grid; width: 42px; height: 42px; place-items: center; content: counter(select); counter-increment: select; color: var(--white); background: var(--forest); border-radius: 50%; font-weight: 900; }
.number-list strong { display: block; color: var(--forest-deep); font-size: 1.08rem; }
.article-cta { margin: 50px 0; padding: 32px; color: var(--white); background: linear-gradient(140deg, #376f58, #244b3d); border-radius: 22px; text-align: center; box-shadow: var(--shadow); }
.article-cta h2 { padding: 0; margin: 0 0 12px; color: var(--white); border: 0; font-size: clamp(1.45rem, 3vw, 2rem); }
.article-cta p { margin-bottom: 20px; color: rgba(255,255,255,.84); }
.button { display: inline-flex; min-height: 52px; padding: 0 24px; align-items: center; justify-content: center; color: #274a3d; background: var(--lime); border-radius: 999px; font-weight: 900; text-decoration: none; }
.button::after { margin-left: 10px; content: "→"; }
.product-facts { display: grid; margin: 28px 0; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.product-facts div { padding: 16px 18px; background: var(--cream); border: 1px solid var(--line); border-radius: 14px; }
.product-facts strong { display: block; color: var(--forest-deep); }
.faq details { margin-bottom: 12px; background: var(--white); border: 1px solid var(--line); border-radius: 14px; }
.faq summary { padding: 18px 48px 18px 20px; cursor: pointer; font-weight: 800; position: relative; }
.faq summary::after { position: absolute; right: 20px; content: "+"; color: var(--forest); font-size: 1.2rem; }
.faq details[open] summary::after { content: "−"; }
.faq details p { padding: 0 20px 18px; margin: 0; color: var(--muted); }
.sources { margin-top: 70px; padding-top: 28px; border-top: 1px solid var(--line); }
.sources h2 { margin-top: 0; font-size: 1.4rem; }
.sources li { margin-bottom: 10px; font-size: .86rem; }
.author-box { margin-top: 34px; padding: 24px; background: var(--cream); border-radius: 16px; }
.author-box strong { display: block; }
.author-box p { margin: 6px 0 0; color: var(--muted); font-size: .84rem; }
.guide-hero { padding: 74px 0; background: linear-gradient(145deg, #f8faed, #e9f3e8); }
.guide-hero p { max-width: 680px; color: var(--muted); }
.article-grid { display: grid; padding: 70px 0 100px; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.article-card { overflow: hidden; background: var(--white); border: 1px solid var(--line); border-radius: 22px; box-shadow: var(--shadow); }
.article-card img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
.article-card-body { padding: 24px; }
.article-card-body small { color: var(--forest); font-weight: 800; }
.article-card-body h2 { padding: 0; margin: 9px 0 14px; border: 0; font-size: 1.35rem; }
.article-card-body p { color: var(--muted); font-size: .9rem; }
.article-card-body a { font-weight: 900; text-decoration: none; }
footer { padding: 46px 0; color: rgba(255,255,255,.82); background: #386b56; font-size: .76rem; }
.footer-brand { margin-bottom: 16px; color: var(--white); font-size: 1rem; font-weight: 900; }
.footer-links { display: flex; margin-bottom: 20px; flex-wrap: wrap; gap: 10px 22px; }
.footer-links a { color: var(--white); }
.footer-disclosure { margin-bottom: 18px; padding: 14px 16px; color: #294d3e; background: #eef6df; border-radius: 12px; font-size: .8rem; font-weight: 800; }
footer p { margin-bottom: 7px; }
@media (max-width: 800px) { .nav-links a:not(.nav-cta) { display: none; } .article-grid { grid-template-columns: 1fr; } }
@media (max-width: 620px) {
  .container, .article-width, .hero-image { width: min(100% - 28px, 1120px); }
  .disclosure-bar { font-size: .68rem; }
  .nav { min-height: 60px; }
  .brand small { display: none; }
  .nav-cta { padding: 8px 13px; font-size: .75rem !important; }
  .article-hero { padding: 38px 0 56px; }
  .hero-image { margin-top: -20px; border-width: 5px; border-radius: 19px; }
  .article-body { padding: 50px 0 76px; }
  h2 { margin-top: 60px; }
  .answer-box, .toc, .warning-box, .note-box, .article-cta { padding: 22px 20px; }
  .product-facts { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }