:root {
    --porcelain: #f7f4ef;
    --glaze: #ffffff;
    --celadon: #6d8f82;
    --ink: #2b2a28;
    --mute: #6f6a63;
    --rim: #c9b58a;
    --shadow: rgba(43,42,40,0.06);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: "Optima", "Palatino Linotype", "Songti SC", "Microsoft YaHei", serif;
    color: var(--ink);
    background: var(--porcelain);
    line-height: 1.75;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
.container { width: min(1080px, calc(100% - 48px)); margin: 0 auto; }

.glaze-bar {
    height: 6px;
    background: linear-gradient(90deg, #e8e2d6, #fff 28%, #d8ece4 52%, #fff 74%, #efe6d2);
}

.site-nav {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(247,244,239,0.92);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(201,181,138,0.35);
}
.nav-wrap {
    display: flex;
    align-items: center;
    gap: 18px;
    min-height: 74px;
}
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    letter-spacing: 0.16em;
    font-size: 15px;
}
.logo-mark {
    width: 32px;
    height: 32px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    background: radial-gradient(circle at 32% 28%, #fff, #d8ece4 46%, var(--celadon));
    color: #fff;
    box-shadow: inset 0 -6px 10px rgba(43,42,40,0.08), 0 1px 0 #fff;
}
.logo small { display: block; font-size: 10px; color: var(--mute); letter-spacing: 0.22em; }
.nav-toggle { display: none; }
.nav-burger {
    display: none;
    margin-left: auto;
    padding: 5px 12px;
    border: 1px solid var(--rim);
    color: var(--celadon);
    font-size: 11px;
    letter-spacing: 0.18em;
    border-radius: 999px;
}
.nav-menu { display: flex; gap: 18px; flex: 1; font-size: 14px; }
.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: 9px 18px;
    border-radius: 999px;
    background: linear-gradient(180deg, #8aa99c, var(--celadon));
    color: #fff;
    font-size: 13px;
    letter-spacing: 0.08em;
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.45), 0 6px 16px rgba(109,143,130,0.22);
}
.btn:hover { filter: brightness(1.05); }
.btn-lg { padding: 12px 22px; }
.btn-ghost {
    background: transparent;
    color: var(--ink);
    box-shadow: none;
    border: 1px solid rgba(201,181,138,0.7);
}

.hero { padding: 58px 0 42px; }
.hero-grid {
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap: 40px;
    align-items: center;
}
.hero-kicker {
    color: var(--celadon);
    letter-spacing: 0.2em;
    font-size: 12px;
    margin-bottom: 14px;
}
.hero h1 {
    font-size: clamp(30px, 4.2vw, 44px);
    line-height: 1.28;
    font-weight: 500;
    margin-bottom: 16px;
}
.hero p { color: var(--mute); max-width: 36em; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 24px; }
.hero-visual {
    padding: 12px;
    border-radius: 28px;
    background: linear-gradient(180deg, #fff, #f3efe7);
    box-shadow: 0 18px 40px var(--shadow), inset 0 1px 0 #fff;
}
.hero-visual img { width: 100%; border-radius: 20px; }

.data-band {
    background: linear-gradient(180deg, #fff, #f6f1e8);
    box-shadow: inset 0 1px 0 #fff;
}
.data-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.data-grid > div { padding: 26px 16px; text-align: center; }
.data-num { font-size: 26px; color: var(--celadon); font-weight: 500; }
.data-label { color: var(--mute); font-size: 12px; letter-spacing: 0.14em; }

.section { padding: 58px 0; }
.section.alt { background: #f1ece3; }
.section-head { margin-bottom: 26px; text-align: center; }
.section-head h2 { font-size: 26px; font-weight: 500; margin-bottom: 8px; }
.section-head p { color: var(--mute); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card {
    padding: 22px 20px;
    background: linear-gradient(180deg, #fff, #f8f4ee);
    border-radius: 22px;
    box-shadow: 0 10px 28px var(--shadow), inset 0 1px 0 #fff;
}
.card.main { box-shadow: 0 10px 28px rgba(109,143,130,0.16), inset 0 1px 0 #fff; }
.card h3 { margin: 10px 0 8px; font-size: 18px; font-weight: 500; }
.card p { color: var(--mute); font-size: 14px; }
.icon {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: radial-gradient(circle at 30% 28%, #fff, var(--celadon));
    box-shadow: inset 0 -3px 6px rgba(43,42,40,0.08);
}
.solution-card { padding: 10px 10px 18px; }
.solution-card img { height: 156px; width: 100%; object-fit: cover; border-radius: 16px; }
.solution-card div { padding: 12px 8px 0; }
.price { color: var(--celadon); letter-spacing: 0.1em; margin-bottom: 8px; }

.cta {
    padding: 64px 0;
    text-align: center;
    background: linear-gradient(180deg, #6d8f82, #58766b);
    color: #fff;
}
.cta h2 { font-size: 28px; font-weight: 500; margin-bottom: 10px; }
.cta p { opacity: 0.88; margin-bottom: 22px; }
.cta-actions { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; }
.cta .btn { background: #fff; color: var(--celadon); box-shadow: inset 0 1px 0 #fff; }
.cta .btn-ghost { background: transparent; color: #fff; border-color: rgba(255,255,255,0.45); }

.site-footer {
    padding: 40px 0 18px;
    background: var(--porcelain);
}
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 24px; }
.footer-grid h4 { color: var(--celadon); margin-bottom: 10px; font-size: 13px; letter-spacing: 0.16em; font-weight: 500; }
.footer-grid a, .footer-grid p { display: block; color: var(--mute); margin-bottom: 6px; font-size: 13px; }
.footer-bottom {
    margin-top: 22px;
    padding-top: 14px;
    border-top: 1px solid rgba(201,181,138,0.4);
    color: #8a847b;
    font-size: 12px;
}

.page-hero { padding: 46px 0 8px; text-align: center; }
.page-hero h1 { font-size: 32px; font-weight: 500; margin: 10px 0; }
.page-hero p { color: var(--mute); max-width: 42em; margin: 0 auto; }
.dl-list, .help-list { display: grid; gap: 14px; }
.dl-item, .help-box {
    padding: 22px 24px;
    background: linear-gradient(180deg, #fff, #f8f4ee);
    border-radius: 22px;
    box-shadow: 0 10px 24px var(--shadow), inset 0 1px 0 #fff;
}
.dl-item { display: flex; justify-content: space-between; gap: 18px; align-items: center; }
.specs { display: flex; gap: 14px; color: var(--celadon); font-size: 12px; margin: 8px 0; letter-spacing: 0.08em; }
.shot {
    margin-top: 22px;
    padding: 10px;
    border-radius: 24px;
    background: linear-gradient(180deg, #fff, #f3efe7);
    box-shadow: 0 10px 24px var(--shadow);
}
.shot img { width: 100%; border-radius: 16px; }

@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; }
    .hero-grid, .grid-3, .data-grid, .footer-grid, .dl-item { grid-template-columns: 1fr; display: grid; }
}