* { box-sizing: border-box; }
:root {
    --primary: #64AAFA;
    --black: #111111;
    --dark: #1C1C1C;
    --mid: #2B2B2B;
    --light: #F5F5F5;
    --white: #ffffff;
    --text: #202633;
    --muted: #657084;
    --border: #e5e9f0;
    --shadow: 0 18px 45px rgba(17, 17, 17, 0.10);
}
body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    color: var(--text);
    background: #f7f9fc;
    line-height: 1.7;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
header, .site-header {
    background: linear-gradient(135deg, var(--primary), #111111);
    color: var(--white);
    position: sticky;
    top: 0;
    z-index: 10;
    box-shadow: 0 8px 30px rgba(0,0,0,.16);
}
.container {
    width: min(1120px, calc(100% - 32px));
    margin: 0 auto;
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    padding: 14px 0;
}
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    letter-spacing: .5px;
}
.logo img { width: 42px; height: 42px; object-fit: contain; border-radius: 12px; background: #fff; padding: 4px; }
.logo span { font-size: 1.25rem; }
nav, .main-nav { display: none; gap: 8px; align-items: center; }
nav a, .main-nav a, .mobile-nav a { padding: 10px 12px; border-radius: 999px; color: #fff; font-weight: 700; font-size: .95rem; }
nav a:hover, .main-nav a:hover, .mobile-nav a:hover { background: rgba(255,255,255,.16); }
.mobile-nav {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 4px;
    width: 100%;
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    background: #111111;
    padding: 8px;
    z-index: 20;
}
.mobile-nav a { text-align: center; font-size: .78rem; padding: 8px 4px; }
.hero, .banner {
    background: radial-gradient(circle at top left, rgba(100,170,250,.25), transparent 38%), linear-gradient(135deg, #111111 0%, #1C1C1C 54%, #233b5b 100%);
    color: var(--white);
    padding: 52px 0;
}
.hero-grid { display: grid; gap: 28px; align-items: center; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.18); padding: 8px 12px; border-radius: 999px; color: #fff; font-weight: 700; }
h1 { font-size: clamp(2rem, 7vw, 4rem); line-height: 1.12; margin: 18px 0; color: inherit; }
h2 { font-size: clamp(1.55rem, 4vw, 2.3rem); line-height: 1.2; margin: 0 0 14px; color: var(--black); }
h3 { margin: 0 0 10px; color: var(--black); }
p { margin: 0 0 14px; }
section { padding: 42px 0; }
.lead { font-size: 1.08rem; color: #dfe9f6; max-width: 740px; }
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 13px 22px;
    border-radius: 999px;
    background: var(--primary);
    color: #06111f;
    font-weight: 800;
    box-shadow: 0 12px 26px rgba(100,170,250,.35);
    border: 0;
    cursor: pointer;
}
.btn:hover { transform: translateY(-1px); }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; margin-top: 24px; }
.age-note { color: #dfe9f6; font-weight: 700; }
.tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.tag { background: rgba(100,170,250,.16); border: 1px solid rgba(100,170,250,.32); color: #fff; padding: 8px 12px; border-radius: 999px; font-weight: 700; }
.app-card { background: rgba(255,255,255,.10); border: 1px solid rgba(255,255,255,.16); padding: 18px; border-radius: 24px; box-shadow: var(--shadow); }
.grid { display: grid; gap: 18px; }
.card {
    background: var(--white);
    border-radius: 20px;
    padding: 22px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}
.card p, .article p { color: var(--muted); }
.notice {
    background: linear-gradient(135deg, rgba(100,170,250,.16), rgba(100,170,250,.04));
    border: 1px solid rgba(100,170,250,.34);
    border-left: 6px solid var(--primary);
    padding: 18px;
    border-radius: 18px;
    color: #1f3554;
}
.notice strong { color: var(--black); }
.faq { display: grid; gap: 14px; }
.faq-item { background: var(--white); border: 1px solid var(--border); border-radius: 18px; padding: 20px; box-shadow: 0 10px 26px rgba(17,17,17,.06); }
.faq-item h3 { font-size: 1.04rem; }
.link-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 18px; }
.link-row a { color: var(--primary); font-weight: 800; }
.article { max-width: 880px; }
.steps { counter-reset: step; display: grid; gap: 14px; }
.step { position: relative; padding-left: 56px; }
.step::before { counter-increment: step; content: counter(step); position: absolute; left: 0; top: 18px; width: 34px; height: 34px; border-radius: 50%; display: grid; place-items: center; background: var(--primary); color: #06111f; font-weight: 900; }
.footer { background: #111111; color: #dfe6f0; padding: 42px 0 86px; }
.footer h2, .footer h3 { color: #fff; }
.footer a { display: block; color: #dfe6f0; margin: 8px 0; }
.footer-grid { display: grid; gap: 22px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.12); margin-top: 28px; padding-top: 18px; font-size: .92rem; color: #b8c3d2; }
@media (min-width: 768px) {
    .main-nav { display: flex; }
    .mobile-nav { display: none; }
    .hero, .banner { padding: 78px 0; }
    .hero-grid { grid-template-columns: 1.15fr .85fr; }
    .grid.two { grid-template-columns: repeat(2, 1fr); }
    .grid.three { grid-template-columns: repeat(3, 1fr); }
    .footer { padding-bottom: 42px; }
    .footer-grid { grid-template-columns: 1.4fr .8fr 1fr 1.2fr; }
}
@media (min-width: 1024px) {
    section { padding: 58px 0; }
    .card { padding: 28px; }
    .hero-grid { gap: 48px; }
}