* { box-sizing: border-box; }
:root { --primary: #00a6ff; --black: #111111; --dark: #1C1C1C; --mid: #2B2B2B; --light: #F5F5F5; --white: #ffffff; --shadow: 0 14px 40px rgba(0,0,0,.10); --radius: 18px; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: Arial, Helvetica, sans-serif; color: var(--black); background: #fff; line-height: 1.7; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
header, .site-header { position: sticky; top: 0; z-index: 50; background: var(--primary); color: #fff; box-shadow: 0 8px 30px rgba(0,0,0,.12); }
.container { width: min(1120px, calc(100% - 32px)); margin: 0 auto; }
.header-inner { display: flex; align-items: center; justify-content: space-between; min-height: 72px; gap: 20px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 800; letter-spacing: .04em; }
.logo img { width: 128px; max-height: 48px; object-fit: contain; }
nav { position: absolute; left: 16px; right: 16px; top: 76px; display: none; flex-direction: column; gap: 8px; padding: 14px; background: #fff; color: var(--black); border-radius: 18px; box-shadow: var(--shadow); }
nav a { padding: 10px 12px; border-radius: 12px; font-weight: 700; }
nav a:hover { background: rgba(0,166,255,.12); }
.mobile-nav { display: inline-flex; flex-direction: column; gap: 5px; cursor: pointer; padding: 8px; }
.mobile-nav span { display: block; width: 26px; height: 3px; border-radius: 20px; background: #fff; }
.nav-toggle { display: none; }
.nav-toggle:checked ~ nav { display: flex; }
.hero, .banner { background: linear-gradient(135deg, #071926 0%, #0a344a 55%, var(--primary) 100%); color: #fff; padding: 52px 0 36px; }
.hero-grid { display: grid; gap: 28px; align-items: center; }
.hero h1, .page-hero h1 { font-size: clamp(2rem, 8vw, 4.4rem); line-height: 1.08; margin: 0 0 18px; letter-spacing: -.04em; }
.hero p, .page-hero p { color: rgba(255,255,255,.88); font-size: 1.04rem; margin: 0 0 22px; }
.hero-card { background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.20); border-radius: 28px; padding: 18px; box-shadow: 0 20px 60px rgba(0,0,0,.22); }
.tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px; }
.tag { display: inline-flex; align-items: center; background: rgba(0,166,255,.16); color: #eaf8ff; border: 1px solid rgba(255,255,255,.26); padding: 8px 12px; border-radius: 999px; font-size: .92rem; font-weight: 700; }
section { padding: 42px 0; }
.section-title { margin: 0 0 14px; font-size: clamp(1.55rem, 5vw, 2.5rem); line-height: 1.2; letter-spacing: -.02em; }
.lead { color: #4c4c4c; max-width: 820px; margin: 0 0 24px; }
.grid { display: grid; gap: 18px; }
.card { background: #fff; border: 1px solid #ececec; border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow); }
.card h2, .card h3 { margin-top: 0; line-height: 1.25; }
.card p:last-child { margin-bottom: 0; }
.card ul, .card ol { padding-left: 20px; margin-bottom: 0; }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 12px 20px; border-radius: 999px; background: var(--primary); color: #fff; font-weight: 800; box-shadow: 0 12px 26px rgba(0,166,255,.28); border: 0; cursor: pointer; }
.btn:hover { transform: translateY(-1px); }
.btn-light { background: #fff; color: #06384f; }
.notice { border-left: 5px solid var(--primary); background: #eef9ff; padding: 18px; border-radius: 16px; color: #123545; margin: 22px 0; }
.faq { display: grid; gap: 14px; }
.faq details { background: #fff; border: 1px solid #e7e7e7; border-radius: 16px; padding: 18px 20px; box-shadow: 0 8px 20px rgba(0,0,0,.06); }
.faq summary { cursor: pointer; font-weight: 800; }
.page-hero { background: linear-gradient(135deg, #071926, #0b4b68); color: #fff; padding: 54px 0 36px; }
.breadcrumbs { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; color: rgba(255,255,255,.78); font-size: .94rem; }
.breadcrumbs a { text-decoration: underline; }
.split { display: grid; gap: 18px; align-items: start; }
.cta-band { background: var(--light); border-radius: 26px; padding: 24px; display: grid; gap: 12px; align-items: center; }
.footer { background: var(--primary); color: #fff; padding: 42px 0 18px; margin-top: 30px; }
.footer-grid { display: grid; gap: 24px; }
.footer h3 { margin: 0 0 10px; }
.footer a { display: block; margin: 8px 0; color: #fff; font-weight: 700; }
.footer p { color: rgba(255,255,255,.88); margin: 8px 0; }
.footer-logo { width: 126px; margin-bottom: 12px; }
.copyright { border-top: 1px solid rgba(255,255,255,.22); margin-top: 22px; padding-top: 18px; font-size: .9rem; color: rgba(255,255,255,.78); }
@media (min-width: 768px) {
    nav { position: static; display: flex; flex-direction: row; gap: 6px; padding: 0; background: transparent; color: #fff; box-shadow: none; }
    nav a:hover { background: rgba(255,255,255,.18); }
    .mobile-nav { display: none; }
    .hero { padding: 74px 0 56px; }
    .hero-grid { grid-template-columns: 1.05fr .95fr; }
    .grid.two { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .grid.three { grid-template-columns: repeat(3, minmax(0,1fr)); }
    .split { grid-template-columns: 1.4fr .8fr; }
    .footer-grid { grid-template-columns: 1.4fr .7fr 1fr; }
    .cta-band { grid-template-columns: 1fr auto; }
}
@media (min-width: 1024px) {
    section { padding: 58px 0; }
    .hero-card { padding: 28px; }
    .card { padding: 28px; }
}