:root {
    --field: #0b1220;
    --lane: #121b2f;
    --volt: #d6ff3c;
    --cyan: #2ee6ff;
    --white: #f4f7ff;
    --muted: #9aa8c2;
    --line: #243353;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: "Segoe UI", "Microsoft YaHei", sans-serif;
    background: var(--field);
    color: var(--white);
    line-height: 1.65;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
.container { width: min(1160px, calc(100% - 32px)); margin: 0 auto; }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 22px;
    border: 0;
    background: var(--volt);
    color: #102000;
    font-weight: 800;
    letter-spacing: 0.04em;
    clip-path: polygon(8px 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
}
.btn:hover { background: #eaff6a; }
.btn-ghost { background: transparent; color: var(--volt); box-shadow: inset 0 0 0 2px var(--volt); }
.btn-lg { padding: 15px 28px; font-size: 16px; }

.race-bar {
    background: repeating-linear-gradient(90deg, #d6ff3c 0 18px, #0b1220 18px 36px);
    color: #0b1220;
    text-align: center;
    font-size: 12px;
    font-weight: 800;
    padding: 6px 10px;
}

.site-nav {
    position: sticky;
    top: 0;
    z-index: 40;
    background: rgba(11, 18, 32, 0.94);
    border-bottom: 1px solid var(--line);
}
.nav-wrap { min-height: 70px; display: flex; align-items: center; justify-content: space-between; gap: 14px; }
.logo { display: flex; align-items: center; gap: 8px; font-weight: 800; }
.logo-mark {
    width: 36px;
    height: 36px;
    background: var(--volt);
    color: #102000;
    display: grid;
    place-items: center;
    font-weight: 900;
}
.nav-menu { display: flex; gap: 16px; flex-wrap: wrap; }
.nav-menu a { font-size: 14px; color: var(--muted); font-weight: 700; }
.nav-menu a:hover, .nav-menu a.active { color: var(--volt); }
.nav-actions { display: flex; gap: 8px; }
.nav-toggle { display: none; }
.nav-burger { display: none; border: 1px solid var(--volt); color: var(--volt); padding: 7px 10px; font-weight: 700; }

.hero {
    padding: 54px 0 36px;
    background:
        linear-gradient(115deg, transparent 0 42%, rgba(46, 230, 255, 0.08) 42% 44%, transparent 44%),
        radial-gradient(circle at 80% 20%, rgba(214, 255, 60, 0.16), transparent 30%),
        var(--field);
}
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 32px; align-items: center; }
.lap {
    display: inline-block;
    color: var(--cyan);
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 0.14em;
    margin-bottom: 10px;
}
.hero h1 { font-size: clamp(30px, 4.6vw, 50px); line-height: 1.12; margin-bottom: 12px; text-transform: none; }
.hero-kicker { color: var(--volt); font-weight: 800; margin-bottom: 8px; }
.hero p { color: var(--muted); margin-bottom: 18px; }
.start-box { background: var(--lane); border-left: 4px solid var(--volt); padding: 18px; }
.meta { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 10px; font-size: 13px; color: var(--muted); }
.hero-visual img { width: 100%; border: 2px solid var(--volt); }

.data-band { background: var(--volt); color: #102000; padding: 24px 0; }
.data-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; text-align: center; }
.data-num { font-size: 30px; font-weight: 900; }
.data-label { font-size: 13px; font-weight: 700; }

.section { padding: 68px 0; }
.section.alt { background: var(--lane); }
.section-head { text-align: center; margin-bottom: 28px; }
.section-head h2 { font-size: 28px; margin-bottom: 8px; }
.section-head p { color: var(--muted); }

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.card { background: #10192c; border: 1px solid var(--line); padding: 18px; }
.card h3 { margin: 8px 0; }
.card p { color: var(--muted); font-size: 14px; }
.icon { color: var(--volt); font-weight: 900; }
.solution-card { padding: 0; overflow: hidden; }
.solution-card img { height: 168px; width: 100%; object-fit: cover; }
.solution-card div { padding: 16px; }
.price { font-size: 24px; color: var(--volt); font-weight: 900; margin: 6px 0 8px; }
.card.main { border-color: var(--volt); }

.cta { padding: 62px 0; text-align: center; background: linear-gradient(90deg, #102000, #0b1220 40%, #0b2a33); }
.cta h2 { font-size: 30px; margin-bottom: 8px; }
.cta p { color: var(--muted); margin-bottom: 18px; }
.cta-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

.site-footer { background: #070c16; color: #8e9bb3; padding: 40px 0 16px; }
.footer-grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr 1fr; gap: 18px; margin-bottom: 16px; }
.footer-grid h4 { color: var(--volt); margin-bottom: 8px; }
.footer-grid a, .footer-grid p { display: block; margin-bottom: 8px; font-size: 14px; color: #8e9bb3; }
.footer-bottom { border-top: 1px solid #1b2740; padding-top: 12px; text-align: center; font-size: 12px; }

.page-hero { padding: 38px 0 6px; text-align: center; }
.page-hero h1 { font-size: 32px; margin-bottom: 8px; }
.page-hero p { color: var(--muted); }

.dl-list { display: grid; gap: 12px; }
.dl-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    background: #10192c;
    border: 1px solid var(--line);
    padding: 18px;
}
.dl-item.main { border-color: var(--volt); }
.specs { display: flex; gap: 8px; flex-wrap: wrap; margin: 8px 0; font-size: 12px; color: var(--muted); }
.specs span { border: 1px solid var(--line); padding: 2px 7px; }
.shot { max-width: 860px; margin: 24px auto 0; }
.shot img { border: 2px solid var(--line); }

.help-list { display: grid; gap: 12px; max-width: 860px; margin: 0 auto; }
.help-box { background: #10192c; border: 1px solid var(--line); padding: 20px; }
.help-box h3 { color: var(--volt); margin-bottom: 8px; }
.help-box p { color: var(--muted); margin-bottom: 8px; }

@media (max-width: 992px) {
    .nav-burger { display: inline-block; }
    .nav-toggle:checked + .nav-burger + .nav-menu { display: flex; }
    .nav-menu {
        display: none;
        position: absolute;
        left: 16px;
        right: 16px;
        top: 116px;
        background: #121b2f;
        border: 1px solid var(--line);
        padding: 12px;
        flex-direction: column;
    }
    .hero-grid, .grid-3, .footer-grid { grid-template-columns: 1fr; }
    .data-grid { grid-template-columns: 1fr 1fr; }
    .dl-item { flex-direction: column; text-align: center; }
    .nav-actions .btn-ghost { display: none; }
}