:root {
    --ink: #0c1220;
    --gold: #c9a24d;
    --sand: #f3ead8;
    --mute: #6d6a62;
    --night: #10182a;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", sans-serif;
    color: var(--ink);
    background: var(--sand);
    line-height: 1.7;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
.container { width: min(880px, calc(100% - 36px)); margin: 0 auto; }

.spire-bar {
    text-align: center;
    padding: 10px 16px;
    letter-spacing: 0.24em;
    font-size: 11px;
    background: var(--night);
    color: var(--gold);
}

.site-nav {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(243, 234, 216, 0.94);
    border-bottom: 1px solid rgba(201, 162, 77, 0.35);
}
.nav-wrap {
    display: flex;
    align-items: center;
    gap: 14px;
    min-height: 70px;
}
.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
}
.logo-mark {
    width: 18px;
    height: 36px;
    display: grid;
    place-items: center;
    background: linear-gradient(180deg, var(--gold), #8a6a28);
    color: #fff;
    font-size: 11px;
    clip-path: polygon(50% 0, 100% 100%, 0 100%);
}
.nav-toggle { display: none; }
.nav-burger {
    display: none;
    margin-left: auto;
    padding: 6px 10px;
    border: 1px solid var(--ink);
    font-size: 13px;
}
.nav-menu { display: flex; gap: 12px; flex: 1; font-size: 13px; }
.nav-menu a { color: var(--mute); }
.nav-menu a.active, .nav-menu a:hover { color: var(--ink); }
.nav-actions { display: flex; gap: 8px; }

.btn {
    display: inline-block;
    padding: 10px 16px;
    background: var(--night);
    color: var(--gold);
}
.btn:hover { background: #182238; }
.btn-lg { padding: 14px 24px; }
.btn-ghost {
    background: transparent;
    color: var(--ink);
    border: 1px solid var(--ink);
}

.hero { padding: 56px 0 40px; text-align: center; }
.hero-visual {
    width: min(420px, 100%);
    margin: 0 auto 28px;
}
.hero-visual img { width: 100%; }
.tag {
    display: inline-block;
    margin-bottom: 10px;
    color: var(--gold);
    letter-spacing: 0.18em;
    font-size: 12px;
}
.hero-kicker { color: var(--mute); margin-bottom: 8px; }
.hero h1 {
    font-size: clamp(28px, 5vw, 44px);
    line-height: 1.25;
    margin-bottom: 14px;
}
.hero p { color: var(--mute); max-width: 34em; margin: 0 auto 20px; }
.meta {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 14px;
    color: var(--mute);
    font-size: 13px;
}

.data-band { padding: 0 0 36px; }
.data-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 8px;
}
.data-grid > div {
    padding: 16px 18px;
    background: #fff;
    border-left: 4px solid var(--gold);
    display: flex;
    justify-content: space-between;
    align-items: baseline;
}
.data-num { font-size: 24px; }
.data-label { color: var(--mute); font-size: 13px; letter-spacing: 0.1em; }

.section { padding: 48px 0; }
.section.alt { background: #ece3cf; }
.section-head { margin-bottom: 22px; text-align: center; }
.section-head h2 { font-size: 28px; margin-bottom: 8px; }
.section-head p { color: var(--mute); }
.grid-3 { display: grid; grid-template-columns: 1fr; gap: 12px; }
.card {
    padding: 18px 20px;
    background: #fff;
}
.card h3 { margin: 8px 0 6px; font-size: 19px; }
.card p { color: var(--mute); font-size: 14px; }
.card.main { border: 1px solid var(--gold); }
.icon {
    width: 8px;
    height: 28px;
    background: var(--gold);
}
.solution-card img { height: 180px; width: 100%; object-fit: cover; margin-bottom: 10px; }
.price { color: var(--gold); margin-bottom: 6px; }

.cta {
    padding: 64px 0;
    text-align: center;
    background: var(--night);
    color: #fff;
}
.cta h2 { font-size: 28px; margin-bottom: 10px; }
.cta p { color: #c8c2b4; margin-bottom: 20px; }
.cta .btn { background: var(--gold); color: var(--night); }
.cta .btn-ghost { background: transparent; color: #fff; border-color: #fff; }
.cta-actions { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; }

.site-footer {
    padding: 40px 0 20px;
    background: var(--sand);
    border-top: 1px solid rgba(201, 162, 77, 0.35);
}
.footer-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.footer-grid h4 { margin-bottom: 10px; }
.footer-grid a, .footer-grid p { display: block; color: var(--mute); margin-bottom: 6px; font-size: 14px; }
.footer-bottom {
    margin-top: 22px;
    padding-top: 12px;
    border-top: 1px solid rgba(201, 162, 77, 0.35);
    color: var(--mute);
    font-size: 12px;
}

.page-hero { padding: 48px 0 12px; text-align: center; }
.page-hero h1 { font-size: 32px; margin: 8px 0 10px; }
.page-hero p { color: var(--mute); }
.dl-list, .help-list { display: grid; gap: 12px; }
.dl-item, .help-box {
    padding: 18px 20px;
    background: #fff;
}
.dl-item { display: grid; gap: 12px; }
.dl-item.main { border-left: 4px solid var(--gold); }
.specs { display: flex; gap: 12px; color: var(--gold); font-size: 13px; margin: 6px 0; }
.shot { margin-top: 22px; }
.shot img { width: 100%; }

@media (max-width: 900px) {
    .nav-burger { display: inline-block; }
    .nav-menu, .nav-actions { display: none; }
    .nav-toggle:checked ~ .nav-menu,
    .nav-toggle:checked ~ .nav-actions {
        display: flex;
        flex-direction: column;
        width: 100%;
        padding-bottom: 16px;
    }
    .nav-wrap { flex-wrap: wrap; }
}