:root{
  --bg:#f7f9fc; --surface:#fff; --ink:#10243a; --muted:#5d6c7c; --line:#dfe7ef;
  --brand:#0b5ea8; --brand2:#0b2340; --soft:#eef6fc; --ok:#eaf7ef; --warn:#fff7e6;
  --radius:18px; --shadow:0 14px 40px rgba(16,36,58,.08);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;line-height:1.68}
a{color:var(--brand);text-underline-offset:3px}
img{max-width:100%}
.wrap{max-width:1120px;margin:auto;padding:0 22px}
.skip{position:absolute;left:-9999px}.skip:focus{left:16px;top:12px;z-index:999;background:#fff;padding:10px 14px;border-radius:10px}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav{height:68px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.logo{font-weight:900;text-decoration:none;color:var(--brand2);letter-spacing:-.03em;font-size:1.08rem}
.nav-links{display:flex;gap:18px;align-items:center}.nav-links a{text-decoration:none;color:#44566b;font-weight:650;font-size:.94rem}
.nav-links a:hover{color:var(--brand)}
.menu-btn{display:none;background:#fff;border:1px solid var(--line);border-radius:10px;padding:8px 11px;font-weight:800}
.hero{padding:74px 0 52px;display:grid;grid-template-columns:1.35fr .75fr;gap:42px;align-items:center}
.kicker{display:inline-flex;gap:8px;align-items:center;background:var(--soft);border:1px solid #d4e7f6;color:var(--brand);border-radius:999px;padding:6px 10px;font-size:.82rem;font-weight:800}
h1,h2,h3{color:var(--brand2);letter-spacing:-.03em}
h1{font-size:clamp(2.45rem,6vw,4.5rem);line-height:1.03;margin:17px 0}
h2{font-size:clamp(1.7rem,3vw,2.35rem);line-height:1.15;margin:0 0 15px}
h3{font-size:1.2rem;margin:0 0 8px}
.lead{font-size:1.15rem;color:var(--muted);max-width:780px}
.coupon-card{background:linear-gradient(145deg,#0b2340,#0b5ea8);color:white;border-radius:24px;padding:30px;box-shadow:var(--shadow)}
.coupon-card .code{font-size:3rem;font-weight:950;letter-spacing:.08em;line-height:1.1;margin:9px 0}
.coupon-card small{text-transform:uppercase;letter-spacing:.11em;opacity:.8;font-weight:800}
.coupon-card p{opacity:.92}
.btns{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}
.btn{display:inline-block;padding:12px 17px;border-radius:11px;text-decoration:none;font-weight:850;border:1px solid var(--brand2)}
.btn.primary{background:var(--brand2);color:white}.btn.secondary{background:white;color:var(--brand2)}
.notice{border-radius:14px;padding:14px 16px;margin:0 0 28px}
.notice.info{background:var(--soft);border:1px solid #d4e7f6}
.notice.warn{background:var(--warn);border:1px solid #f1ddac}
.notice.ok{background:var(--ok);border:1px solid #cfe8d6}
.section{padding:44px 0;border-top:1px solid var(--line)}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:0 6px 20px rgba(16,36,58,.035)}
.card p{color:var(--muted);margin-bottom:0}.card h3 a{text-decoration:none;color:var(--brand2)}
.badge{display:inline-block;background:var(--soft);color:var(--brand);border-radius:8px;padding:4px 8px;font-size:.78rem;font-weight:800;margin-bottom:10px}
.article-shell{display:grid;grid-template-columns:minmax(0,760px) 260px;gap:42px;padding:54px 0}
.article{background:#fff;border:1px solid var(--line);border-radius:22px;padding:clamp(24px,5vw,50px);box-shadow:var(--shadow)}
.article h1{font-size:clamp(2.15rem,5vw,3.6rem)}
.article h2{margin-top:42px}
.article h3{margin-top:28px}
.article p,.article li{color:#33485f}
.article .lede{font-size:1.13rem;color:var(--muted)}
.article ul,.article ol{padding-left:22px}
.article table{width:100%;border-collapse:collapse;margin:20px 0;font-size:.95rem}
.article th,.article td{border:1px solid var(--line);padding:11px;text-align:left;vertical-align:top}
.article th{background:var(--soft)}
.breadcrumbs{font-size:.87rem;color:var(--muted);margin-bottom:18px}.breadcrumbs a{color:var(--muted)}
.byline{font-size:.9rem;color:var(--muted);border-bottom:1px solid var(--line);padding-bottom:18px;margin-bottom:24px}
.sidebar{position:sticky;top:92px;align-self:start}
.sidebox{background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px;margin-bottom:16px}
.sidebox strong{display:block;margin-bottom:8px}.sidebox a{display:block;margin:6px 0;text-decoration:none;font-size:.92rem}
.source-list li{margin:8px 0}
.faq details{background:#fff;border:1px solid var(--line);border-radius:14px;padding:15px 17px;margin:10px 0}
.faq summary{cursor:pointer;font-weight:850}
.faq p{color:var(--muted)}
.cta{margin:34px 0;background:linear-gradient(145deg,#eef6fc,#fff);border:1px solid #d7e7f3;border-radius:18px;padding:22px}
.cta code{font-size:1.25rem;font-weight:900;color:var(--brand2);background:#fff;border:1px dashed #a9c8df;border-radius:8px;padding:3px 8px}
.site-footer{margin-top:55px;background:#0b2340;color:#d8e2ee}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:28px;padding:38px 22px}
.site-footer a{color:#d8e2ee}.site-footer p{color:#b8c7d6}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:17px 0;color:#9fb1c4;font-size:.86rem}
.disclosure{font-size:.9rem;color:var(--muted)}
.pill-links{display:flex;gap:9px;flex-wrap:wrap}.pill-links a{background:var(--soft);border-radius:9px;padding:7px 10px;text-decoration:none;font-size:.87rem}
@media(max-width:900px){
  .hero{grid-template-columns:1fr}.article-shell{grid-template-columns:1fr}.sidebar{position:static}.grid{grid-template-columns:1fr 1fr}
}
@media(max-width:680px){
  .nav-links{display:none}.menu-btn{display:block}.grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr}
  .hero{padding-top:44px}.article-shell{padding-top:28px}.article{border-radius:16px;padding:24px}
}