:root {
    --primary: #1989fa;
    --black: #111111;
    --dark: #1C1C1C;
    --mid: #2B2B2B;
    --light: #F5F5F5;
    --white: #ffffff;
    --radius: 18px;
    --shadow: 0 12px 30px rgba(17,17,17,.09);
}
* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    color: var(--black);
    background: var(--light);
    line-height: 1.65;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
header, section, footer { width: 100%; }
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255,255,255,.97);
    border-bottom: 1px solid rgba(17,17,17,.08);
    box-shadow: 0 6px 22px rgba(17,17,17,.05);
}
.header-inner {
    max-width: 1180px;
    margin: 0 auto;
    padding: 12px 18px;
    display: grid;
    grid-template-columns: 44px 1fr 0;
    align-items: center;
    gap: 12px;
}
.logo { justify-self: center; display: inline-flex; align-items: center; }
.logo img { width: 132px; height: auto; border-radius: 12px; }
.main-nav, .header-actions { display: none; }
.mobile-menu-toggle {
    border: 0;
    background: var(--primary);
    color: var(--white);
    width: 42px;
    height: 42px;
    border-radius: 14px;
    font-size: 22px;
    cursor: pointer;
    line-height: 1;
}
.mobile-nav {
    display: none;
    max-width: 1180px;
    margin: 0 auto;
    padding: 8px 18px 14px;
    gap: 8px;
    position: relative;
    z-index: 60;
    background: #ffffff;
}
.mobile-nav.is-open {
    display: grid;
}
.mobile-nav a {
    padding: 12px 14px;
    border-radius: 14px;
    background: var(--light);
    font-weight: 700;
}
.mobile-actions {
    display: flex;
    justify-content: center;
    gap: 10px;
    padding: 0 18px 14px;
}
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 13px 22px;
    border-radius: 999px;
    background: linear-gradient(135deg, var(--primary), #0f6fcf);
    color: #fff;
    font-weight: 800;
    border: 0;
    box-shadow: 0 10px 22px rgba(25,137,250,.26);
}
.btn-small { padding: 10px 18px; font-size: 14px; }
.btn-alt { background: linear-gradient(135deg, #1C1C1C, #2B2B2B); }
.container {
    width: min(1120px, calc(100% - 32px));
    margin: 0 auto;
}
.hero, .banner {
    background: radial-gradient(circle at top right, rgba(25,137,250,.25), transparent 35%), linear-gradient(135deg, #0b1728, #102a45);
    color: #fff;
    padding: 42px 0;
}
.hero-wrap {
    display: grid;
    gap: 28px;
    align-items: center;
}
.hero h1, .banner h1 {
    font-size: clamp(32px, 7vw, 56px);
    line-height: 1.08;
    margin: 0 0 16px;
}
.hero p, .banner p { color: rgba(255,255,255,.86); font-size: 17px; }
.hero-img {
    border-radius: 28px;
    overflow: hidden;
    box-shadow: 0 20px 45px rgba(0,0,0,.25);
    border: 1px solid rgba(255,255,255,.18);
}
.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 20px 0;
}
.tag {
    padding: 9px 12px;
    border-radius: 999px;
    background: rgba(255,255,255,.12);
    border: 1px solid rgba(255,255,255,.2);
    font-weight: 700;
    font-size: 14px;
}
section { padding: 48px 0; }
.section-title {
    font-size: clamp(26px, 4vw, 40px);
    margin: 0 0 14px;
}
.section-lead { color: #555; margin: 0 0 24px; }
.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,.06);
}
.card h2, .card h3 { margin-top: 0; }
.notice {
    border-left: 5px solid var(--primary);
    background: #fff;
    border-radius: 16px;
    padding: 18px;
    box-shadow: var(--shadow);
    margin: 22px 0;
}
.faq {
    display: grid;
    gap: 14px;
}
.faq details {
    background: #fff;
    border-radius: 16px;
    padding: 18px;
    box-shadow: var(--shadow);
}
.faq summary {
    cursor: pointer;
    font-weight: 800;
}
.steps {
    counter-reset: step;
    display: grid;
    gap: 16px;
}
.step {
    position: relative;
    padding-left: 56px;
}
.step::before {
    counter-increment: step;
    content: counter(step);
    position: absolute;
    left: 0;
    top: 2px;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    display: grid;
    place-items: center;
    font-weight: 800;
}
.footer {
    background: var(--dark);
    color: #fff;
    padding: 42px 0;
}
.footer-grid {
    display: grid;
    gap: 22px;
}
.footer p { color: rgba(255,255,255,.76); }
.footer-logo { font-size: 28px; font-weight: 900; color: #fff; }
.footer-nav {
    display: grid;
    gap: 10px;
}
.footer-nav a {
    color: rgba(255,255,255,.86);
    font-weight: 700;
}
@media (min-width: 768px) {
    .header-inner {
        grid-template-columns: auto 1fr auto;
        gap: 24px;
        padding: 14px 24px;
    }
    .logo { justify-self: start; }
    .logo img { width: 150px; }
    .mobile-menu-toggle, .mobile-nav, .mobile-actions { display: none; }
    .main-nav {
        display: flex;
        justify-content: center;
        gap: 8px;
    }
    .main-nav a {
        padding: 10px 14px;
        border-radius: 999px;
        font-weight: 800;
        color: #333;
    }
    .main-nav a:hover { background: var(--light); }
    .header-actions {
        display: flex;
        gap: 10px;
        align-items: center;
    }
    .hero-wrap { grid-template-columns: 1.1fr .9fr; }
    .grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1.4fr .8fr 1fr; }
}
@media (min-width: 1024px) {
    .header-inner { padding-left: 32px; padding-right: 32px; }
    .grid.three { grid-template-columns: repeat(3, 1fr); }
    section { padding: 64px 0; }
}