:root {
    --primary: #43acf2;
    --black: #111111;
    --deep: #1C1C1C;
    --mid: #2B2B2B;
    --light: #F5F5F5;
    --white: #ffffff;
    --shadow: 0 18px 45px rgba(17, 17, 17, 0.10);
    --radius: 20px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    color: var(--black);
    background: #ffffff;
    line-height: 1.65;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
header, nav, section, footer { display: block; }
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255,255,255,0.96);
    border-bottom: 1px solid rgba(17,17,17,0.08);
    box-shadow: 0 8px 20px rgba(17,17,17,0.04);
}
.header-inner {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
    min-height: 74px;
    display: grid;
    grid-template-columns: 44px 1fr;
    align-items: center;
    gap: 12px;
    position: relative;
}
.logo { display: flex; align-items: center; justify-content: center; }
.logo img { width: 128px; max-height: 48px; object-fit: contain; }
.mobile-menu-toggle {
    width: 42px;
    height: 42px;
    border: 0;
    border-radius: 14px;
    background: var(--primary);
    color: #fff;
    font-size: 25px;
    line-height: 1;
    cursor: pointer;
    box-shadow: 0 10px 22px rgba(67,172,242,0.28);
}
.main-nav, .header-actions { display: none; }
.mobile-actions {
    display: flex;
    justify-content: center;
    gap: 10px;
    padding: 0 16px 14px;
}
.mobile-nav {
    display: none;
    width: min(520px, calc(100% - 32px));
    margin: 0 auto 12px;
    padding: 12px;
    border-radius: 18px;
    background: #fff;
    box-shadow: var(--shadow);
    border: 1px solid rgba(17,17,17,0.08);
    position: relative;
    z-index: 60;
}
.mobile-nav.is-open {
    display: grid;
}
.mobile-nav a {
    padding: 13px 14px;
    border-radius: 12px;
    color: var(--deep);
    font-weight: 700;
}
.mobile-nav a:hover { background: rgba(67,172,242,0.12); }
.container {
    width: min(1120px, calc(100% - 32px));
    margin: 0 auto;
}
section { padding: 56px 0; }
.hero, .banner {
    background:
        radial-gradient(circle at 20% 10%, rgba(67,172,242,0.35), transparent 28%),
        linear-gradient(135deg, #101826 0%, #17283d 58%, #0f141c 100%);
    color: #fff;
    overflow: hidden;
}
.hero .container {
    display: grid;
    gap: 34px;
    align-items: center;
}
.eyebrow {
    display: inline-flex;
    padding: 8px 13px;
    border-radius: 999px;
    background: rgba(67,172,242,0.18);
    color: #eaf7ff;
    font-size: 13px;
    font-weight: 800;
    letter-spacing: .02em;
}
h1, h2, h3 { line-height: 1.18; margin: 0 0 16px; }
h1 { font-size: clamp(34px, 9vw, 60px); letter-spacing: -0.04em; }
h2 { font-size: clamp(26px, 6vw, 42px); letter-spacing: -0.03em; }
h3 { font-size: 20px; }
p { margin: 0 0 14px; }
.lead { font-size: 18px; color: rgba(255,255,255,0.86); max-width: 680px; }
.hero-card {
    background: rgba(255,255,255,0.10);
    border: 1px solid rgba(255,255,255,0.18);
    border-radius: 28px;
    padding: 18px;
    backdrop-filter: blur(10px);
}
.hero-card img { border-radius: 22px; margin: auto; }
.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 24px 0;
}
.tag {
    display: inline-flex;
    border-radius: 999px;
    padding: 9px 13px;
    background: rgba(255,255,255,0.12);
    border: 1px solid rgba(255,255,255,0.18);
    font-size: 13px;
    font-weight: 700;
}
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    padding: 13px 22px;
    border-radius: 999px;
    background: linear-gradient(135deg, var(--primary), #176ed4);
    color: #fff;
    font-weight: 800;
    border: 0;
    cursor: pointer;
    box-shadow: 0 14px 28px rgba(67,172,242,0.25);
}
.btn-small { min-height: 40px; padding: 10px 17px; font-size: 14px; }
.btn-dark { background: linear-gradient(135deg, #2B2B2B, #111111); }
.grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 18px;
}
.card {
    background: #fff;
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
    border: 1px solid rgba(17,17,17,0.06);
}
.card h3 { color: var(--deep); }
.card p, .content p, li { color: #4c4c4c; }
.alt { background: var(--light); }
.notice {
    border-radius: var(--radius);
    padding: 22px;
    background: rgba(67,172,242,0.12);
    border: 1px solid rgba(67,172,242,0.28);
    color: #17324a;
}
.notice strong { color: var(--deep); }
.faq {
    display: grid;
    gap: 14px;
}
.faq-item {
    background: #fff;
    border-radius: 18px;
    padding: 20px;
    border: 1px solid rgba(17,17,17,0.08);
    box-shadow: 0 10px 28px rgba(17,17,17,0.06);
}
.page-hero {
    padding: 54px 0;
    background: linear-gradient(135deg, rgba(67,172,242,0.18), rgba(245,245,245,0.95));
}
.page-hero p { max-width: 760px; color: #444; font-size: 18px; }
.content {
    display: grid;
    gap: 22px;
}
.link-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 18px;
}
.link-row a {
    padding: 8px 12px;
    border-radius: 999px;
    background: #f0f7ff;
    color: #175c99;
    font-weight: 700;
    font-size: 14px;
}
.steps {
    counter-reset: step;
    display: grid;
    gap: 16px;
    list-style: none;
    padding: 0;
    margin: 0;
}
.steps li {
    counter-increment: step;
    position: relative;
    padding: 18px 18px 18px 62px;
    background: #fff;
    border-radius: 18px;
    box-shadow: var(--shadow);
}
.steps li::before {
    content: counter(step);
    position: absolute;
    left: 18px;
    top: 18px;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    background: var(--primary);
    color: #fff;
    font-weight: 800;
}
.footer {
    background: #111111;
    color: rgba(255,255,255,0.82);
    padding-top: 48px;
}
.footer-grid {
    display: grid;
    gap: 24px;
}
.footer a { display: block; color: rgba(255,255,255,0.86); margin: 7px 0; }
.footer h3, .footer-logo { color: #fff; }
.footer-logo { font-size: 26px; font-weight: 900; letter-spacing: .04em; }
.footer-bottom {
    margin-top: 28px;
    padding: 18px;
    text-align: center;
    border-top: 1px solid rgba(255,255,255,0.10);
    color: rgba(255,255,255,0.62);
}
@media (min-width: 768px) {
    .header-inner {
        min-height: 82px;
        grid-template-columns: auto 1fr auto;
        gap: 28px;
    }
    .mobile-menu-toggle, .mobile-actions { display: none; }
    .main-nav {
        display: flex;
        justify-content: center;
        align-items: center;
        gap: 8px;
    }
    .main-nav a {
        padding: 10px 13px;
        border-radius: 999px;
        font-weight: 800;
        color: var(--deep);
    }
    .main-nav a:hover { background: rgba(67,172,242,0.12); }
    .header-actions { display: flex; gap: 10px; }
    .mobile-nav, .mobile-nav.is-open { display: none; }
    .hero .container { grid-template-columns: 1.15fr .85fr; }
    .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .footer-grid { grid-template-columns: 1.4fr .7fr 1fr; }
}
@media (min-width: 1024px) {
    .header-inner { width: min(1240px, calc(100% - 72px)); }
    .logo img { width: 150px; }
    section { padding: 72px 0; }
    .grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .card { padding: 28px; }
}