:root {
    --primary: #CAE9FE;
    --primary-strong: #2F89C7;
    --black: #111111;
    --dark: #1C1C1C;
    --mid: #2B2B2B;
    --light: #F5F5F5;
    --white: #ffffff;
    --shadow: 0 18px 50px rgba(17,17,17,.10);
    --radius: 18px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: Arial, Helvetica, sans-serif; color: var(--black); background: #fbfdff; line-height: 1.65; overflow-x: hidden; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
header, .site-header { width: 100%; }
.site-header { background: linear-gradient(135deg, var(--primary), #ffffff); border-bottom: 1px solid rgba(17,17,17,.08); position: sticky; top: 0; z-index: 30; }
.header-inner { max-width: 1180px; margin: 0 auto; padding: 12px 18px; display: grid; grid-template-columns: 48px 1fr 48px; align-items: center; gap: 10px; }
.logo { display: flex; align-items: center; justify-content: center; min-width: 0; }
.logo img { width: 122px; height: auto; object-fit: contain; }
.main-nav, .header-actions { display: none; }
.main-nav a, .mobile-nav a, .footer a { transition: .2s ease; }
.mobile-menu-toggle { width: 42px; height: 42px; border: 0; border-radius: 14px; background: var(--black); color: #fff; font-size: 24px; line-height: 1; cursor: pointer; }
.mobile-nav { display: none; padding: 8px 18px 16px; background: #ffffff; border-top: 1px solid rgba(17,17,17,.08); box-shadow: 0 20px 40px rgba(17,17,17,.08); }
.mobile-nav.is-open { display: grid; }
.mobile-nav a { padding: 12px 14px; border-radius: 14px; font-weight: 700; }
.mobile-nav a:hover { background: var(--light); color: var(--primary-strong); }
.mobile-actions { display: flex; gap: 10px; justify-content: center; padding: 0 18px 14px; }
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 13px 22px; border-radius: 999px; border: 1px solid rgba(17,17,17,.08); background: linear-gradient(135deg, var(--primary-strong), #62c3ff); color: #fff; font-weight: 800; box-shadow: 0 12px 28px rgba(47,137,199,.25); cursor: pointer; text-align: center; }
.btn:hover { transform: translateY(-1px); box-shadow: 0 15px 34px rgba(47,137,199,.32); }
.btn-dark { background: linear-gradient(135deg, var(--black), var(--mid)); }
.btn-small { padding: 10px 18px; font-size: 14px; }
.container { width: min(1120px, calc(100% - 36px)); margin: 0 auto; }
section { padding: 54px 0; }
.hero, .banner { background: radial-gradient(circle at top right, #ffffff 0, var(--primary) 42%, #eef8ff 100%); }
.hero .container, .banner .container { display: grid; gap: 28px; align-items: center; }
.hero h1, .banner h1 { margin: 0 0 16px; font-size: clamp(34px, 8vw, 60px); line-height: 1.08; letter-spacing: -.04em; }
.hero p, .banner p { font-size: 18px; margin: 0 0 18px; color: #26323d; }
.hero-image { background: rgba(255,255,255,.55); border: 1px solid rgba(17,17,17,.08); border-radius: 28px; padding: 18px; box-shadow: var(--shadow); }
.tag-list { display: flex; flex-wrap: wrap; gap: 10px; margin: 20px 0; }
.tag { display: inline-flex; padding: 8px 12px; border-radius: 999px; background: rgba(255,255,255,.75); border: 1px solid rgba(17,17,17,.08); font-size: 14px; font-weight: 700; }
.grid { display: grid; gap: 18px; }
.grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
.card { background: #fff; border: 1px solid rgba(17,17,17,.08); border-radius: var(--radius); padding: 24px; box-shadow: 0 12px 34px rgba(17,17,17,.07); }
.card h2, .card h3 { margin-top: 0; line-height: 1.2; }
.card p:last-child { margin-bottom: 0; }
.notice { background: linear-gradient(135deg, rgba(202,233,254,.92), #fff); border-left: 6px solid var(--primary-strong); border-radius: var(--radius); padding: 20px; box-shadow: 0 10px 28px rgba(17,17,17,.07); }
.faq { display: grid; gap: 14px; }
.faq details { background: #fff; border: 1px solid rgba(17,17,17,.08); border-radius: 16px; padding: 18px 20px; box-shadow: 0 10px 24px rgba(17,17,17,.05); }
.faq summary { cursor: pointer; font-weight: 800; }
.page-head { background: linear-gradient(135deg, #ffffff, var(--primary)); padding: 46px 0; }
.page-head h1 { font-size: clamp(30px, 7vw, 50px); line-height: 1.1; margin: 0 0 12px; }
.content-list { padding-left: 20px; }
.content-list li { margin: 8px 0; }
.cta-box { text-align: center; background: var(--black); color: #fff; border-radius: 28px; padding: 34px 22px; box-shadow: var(--shadow); }
.cta-box p { color: rgba(255,255,255,.82); }
.footer { background: var(--black); color: #fff; padding-top: 44px; }
.footer-grid { display: grid; gap: 24px; }
.footer-logo { width: 120px; margin-bottom: 14px; }
.footer h3 { margin-top: 0; }
.footer a { display: block; color: rgba(255,255,255,.78); margin: 7px 0; }
.footer a:hover { color: #fff; }
.footer p { color: rgba(255,255,255,.78); }
.footer-bottom { margin-top: 28px; padding: 18px; border-top: 1px solid rgba(255,255,255,.12); text-align: center; color: rgba(255,255,255,.7); }
@media (min-width: 768px) {
    .site-header { background: #ffffff; }
    .header-inner { grid-template-columns: auto 1fr auto; padding: 14px 26px; }
    .mobile-menu-toggle, .mobile-actions, .mobile-nav { display: none !important; }
    .logo { justify-content: flex-start; }
    .logo img { width: 136px; }
    .main-nav { display: flex; justify-content: center; align-items: center; gap: 8px; }
    .main-nav a { padding: 10px 14px; border-radius: 999px; font-weight: 700; }
    .main-nav a:hover { background: var(--primary); color: var(--black); }
    .header-actions { display: flex; gap: 10px; justify-content: flex-end; }
    .hero .container, .banner .container { grid-template-columns: 1.05fr .95fr; }
    .grid-2 { grid-template-columns: repeat(2, 1fr); }
    .grid-3 { grid-template-columns: repeat(3, 1fr); }
    .grid-4 { grid-template-columns: repeat(4, 1fr); }
    .footer-grid { grid-template-columns: 1.3fr .7fr 1.2fr; }
}
@media (min-width: 1024px) {
    .header-inner { max-width: 1240px; padding: 16px 36px; }
    .logo img { width: 150px; }
    section { padding: 72px 0; }
    .card { padding: 28px; }
}