:root {
  --tng-navy: #062651;
  --tng-blue: #064f9f;
  --tng-blue-bright: #0875d1;
  --tng-gold: #f4c400;
  --tng-gold-dark: #9a7600;
  --tng-canvas: #b9b9b9;
  --tng-panel: #f5f5f5;
  --tng-white: #fff;
  --tng-text: #111827;
  --tng-muted: #5f6875;
  --tng-line: #d5dbe3;
  --tng-soft-blue: #edf4fb;
  --panel: #fff;
  --line: #d5dbe3;
  --gold: #064f9f;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--tng-canvas); }
body { margin: 0; overflow-x: hidden; color: var(--tng-text); background: var(--tng-canvas); font: 16px/1.65 Arial, Helvetica, sans-serif; }
a { color: var(--tng-blue); }
a:hover { color: var(--tng-gold-dark); }
a:focus-visible { outline: 3px solid var(--tng-gold); outline-offset: 3px; }
.site-header { min-height: 76px; background: var(--tng-navy); border-bottom: 7px solid var(--tng-gold); box-shadow: 0 2px 8px rgb(0 0 0 / 20%); }
.nav { width: min(1200px, 100%); min-height: 69px; margin: auto; padding: 8px 24px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.logo { display: block; width: 145px; height: 50px; object-fit: contain; }
.nav-link { min-height: 44px; display: inline-flex; align-items: center; padding: 8px 20px; color: var(--tng-navy); background: linear-gradient(180deg, #ffe65a, var(--tng-gold)); border: 2px solid var(--tng-gold-dark); border-radius: 24px; font-weight: 800; text-decoration: none; }
.nav-link:hover { color: var(--tng-navy); filter: brightness(1.05); }
.wrap { width: min(960px, calc(100% - 32px)); margin: 28px auto 52px; padding: 38px 44px 64px; background: var(--tng-panel); border: 1px solid #9d9d9d; border-top: 18px solid var(--tng-gold); box-shadow: 0 3px 16px rgb(0 0 0 / 18%); }
.breadcrumb { margin-bottom: 28px; color: var(--tng-muted); font-size: .9rem; }
.breadcrumb a { font-weight: 700; }
.featured-image { display: block; margin: 0 -44px 36px; }
.featured-image img { display: block; width: 100%; height: auto; }
h1, h2, h3 { color: var(--tng-blue); }
h1 { margin: 0 0 20px; font-size: clamp(2rem, 5vw, 3.35rem); line-height: 1.1; letter-spacing: -.025em; }
h2 { margin: 48px 0 18px; font-size: clamp(1.55rem, 3vw, 2.15rem); line-height: 1.2; }
h3 { margin: 0 0 5px; font-size: 1.2rem; line-height: 1.35; }
p { margin: 0 0 20px; }
li { margin-bottom: 8px; }
.lede { margin-bottom: 18px; color: #303846; font-size: 1.15rem; }
.byline { margin-bottom: 34px; color: var(--tng-muted); font-size: .94rem; }
.byline a { font-weight: 700; }
.toc { padding: 20px 24px 14px; background: var(--tng-white); border: 1px solid var(--tng-line); border-left: 5px solid var(--tng-blue); border-radius: 12px; box-shadow: 0 2px 8px rgb(6 38 81 / 8%); }
.toc h2 { margin: 0 0 8px; font-size: 1.35rem; }
.toc ol { margin: 0; padding-left: 22px; columns: 2; column-gap: 34px; }
.toc a { font-weight: 700; text-decoration-thickness: 1px; text-underline-offset: 3px; }
.checklist, .steps, article section > ul { padding-left: 28px; }
.checklist li::marker, .steps li::marker, article section > ul li::marker { color: var(--tng-blue); font-weight: 800; }
.steps { counter-reset: item; list-style: none; padding: 0; }
.steps > li { position: relative; min-height: 62px; margin: 0 0 14px; padding: 17px 20px 14px 68px; background: var(--tng-white); border: 1px solid var(--tng-line); border-radius: 12px; }
.steps > li::before { counter-increment: item; content: counter(item); position: absolute; top: 16px; left: 18px; width: 34px; height: 34px; display: grid; place-items: center; color: var(--tng-navy); background: var(--tng-gold); border-radius: 50%; font-weight: 900; }
.steps p { margin: 0; color: #3f4855; }
.notice { margin-top: 24px; padding: 20px 22px; color: #20242b; background: #fff8d7; border-left: 5px solid var(--tng-gold); }
.accuracy { margin-top: 42px; background: var(--tng-soft-blue); border-left-color: var(--tng-blue); }
.faq details { margin: 0 0 12px; padding: 0; background: var(--tng-white); border: 1px solid var(--tng-line); border-radius: 10px; overflow: hidden; }
.faq summary { min-height: 54px; padding: 14px 48px 14px 18px; display: flex; align-items: center; position: relative; color: var(--tng-blue); cursor: pointer; font-size: 1.08rem; font-weight: 800; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 18px; color: var(--tng-gold-dark); font-size: 1.5rem; }
.faq details[open] summary::after { content: "−"; }
.faq details p { margin: 0; padding: 0 18px 18px; color: #3f4855; }
.author-box { margin-top: 42px; padding: 1px 24px 24px; background: var(--tng-white); border: 1px solid var(--tng-line); border-radius: 12px; }
.author-box h2 { margin-top: 22px; }
.author-box a { font-weight: 800; }
.guide-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 36px; }
.guide-nav a { padding: 16px; color: var(--tng-navy); background: var(--tng-white); border: 2px solid var(--tng-gold); border-radius: 12px; font-weight: 800; text-decoration: none; }
.guide-nav a:last-child { text-align: right; }
.guide-nav a:hover { background: #fff8cf; }
.guide-nav span { display: block; color: var(--tng-muted); font-size: .75rem; letter-spacing: .06em; text-transform: uppercase; }
.cta { min-width: 210px; margin-top: 28px; padding: 14px 28px; display: inline-block; color: var(--tng-white); background: linear-gradient(180deg, var(--tng-blue-bright), var(--tng-navy)); border: 2px solid var(--tng-gold); border-radius: 28px; box-shadow: 0 3px 8px rgb(0 0 0 / 25%); font-weight: 800; text-align: center; text-decoration: none; }
.cta:hover { color: var(--tng-white); filter: brightness(1.08); transform: translateY(-1px); }
.post-card { background: var(--tng-white) !important; border-color: var(--tng-line) !important; box-shadow: 0 2px 9px rgb(6 38 81 / 9%); }
.post-card h2 { margin: 0 0 10px; padding: 0; font-size: 1.25rem; }
.post-card p { color: #3f4855 !important; }
.read-more { color: var(--tng-blue) !important; }
.site-footer { padding: 34px 22px; color: var(--tng-white); background: var(--tng-navy); border-top: 7px solid var(--tng-gold); text-align: center; }
@media (max-width: 700px) {
  .site-header { min-height: 64px; }
  .nav { min-height: 57px; padding: 6px 14px; }
  .logo { width: 120px; height: 44px; }
  .nav-link { padding: 6px 15px; }
  .wrap { width: 100%; margin: 8px 0 0; padding: 30px 18px 50px; border-right: 0; border-left: 0; }
  .featured-image { margin-right: -18px; margin-left: -18px; }
  .toc ol { columns: 1; }
  .steps > li { padding-left: 62px; }
  .guide-nav { grid-template-columns: 1fr; }
  .guide-nav a:last-child { text-align: left; }
}
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; } }