:root {
    --water: #1c4d5a;
    --deep: #12343d;
    --brick: #b85a3d;
    --sand: #f3ece2;
    --ink: #1a2a2e;
    --mute: #5d6b6e;
    --line: #d8cfc4;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: "Georgia", "Songti SC", "STSong", "SimSun", serif;
    color: var(--ink);
    background: var(--sand);
    line-height: 1.75;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
.container { width: min(1100px, calc(100% - 40px)); margin: 0 auto; }

.canal-bar {
    display: flex;
    justify-content: space-between;
    padding: 10px 28px;
    letter-spacing: 0.28em;
    font-size: 11px;
    background: var(--water);
    color: #e8f2f4;
}
.canal-bar span:nth-child(2) { color: #f0c9b4; }

.site-nav {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(243, 236, 226, 0.94);
    border-bottom: 1px solid var(--line);
}
.nav-wrap {
    display: flex;
    align-items: center;
    gap: 18px;
    min-height: 74px;
}
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
}
.logo-mark {
    width: 34px;
    height: 34px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    background: var(--water);
    color: #fff;
}
.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: 18px; flex: 1; font-size: 14px; }
.nav-menu a { color: var(--mute); }
.nav-menu a.active, .nav-menu a:hover { color: var(--water); }
.nav-actions { display: flex; gap: 10px; }

.btn {
    display: inline-block;
    padding: 10px 22px;
    background: var(--water);
    color: #fff;
    border-radius: 999px;
}
.btn:hover { background: var(--deep); }
.btn-lg { padding: 14px 28px; }
.btn-ghost {
    background: transparent;
    color: var(--ink);
    border: 1px solid var(--ink);
}

.hero {
    position: relative;
    padding: 72px 0 88px;
    overflow: hidden;
}
.hero::before,
.hero::after {
    content: "";
    position: absolute;
    left: -10%;
    right: -10%;
    height: 90px;
    border-radius: 50%;
    pointer-events: none;
}
.hero::before {
    bottom: -40px;
    background: var(--water);
    opacity: 0.18;
}
.hero::after {
    bottom: -58px;
    background: var(--brick);
    opacity: 0.12;
}
.hero-grid {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 40px;
    align-items: center;
}
.tag {
    display: inline-block;
    margin-bottom: 12px;
    color: var(--brick);
    letter-spacing: 0.2em;
    font-size: 12px;
}
.hero-kicker { color: var(--mute); margin-bottom: 8px; }
.hero h1 {
    font-size: clamp(30px, 4.2vw, 48px);
    line-height: 1.25;
    margin-bottom: 16px;
}
.hero p { color: var(--mute); max-width: 36em; }
.flow { margin-top: 26px; }
.meta {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 14px;
    color: var(--water);
    font-size: 13px;
}
.hero-visual img {
    width: 100%;
    border-radius: 0 80px 0 80px;
    border: 1px solid var(--line);
}

.data-band {
    padding: 36px 0;
    background: var(--water);
    color: #e8f2f4;
}
.data-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    text-align: center;
}
.data-num { font-size: 28px; color: #f0c9b4; }
.data-label { font-size: 13px; letter-spacing: 0.14em; opacity: 0.85; }

.section { padding: 72px 0; }
.section.alt { background: #e9e2d6; }
.section-head { margin-bottom: 28px; }
.section-head h2 { font-size: 30px; margin-bottom: 8px; }
.section-head p { color: var(--mute); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card {
    padding: 22px;
    background: #fffaf4;
    border: 1px solid var(--line);
    border-radius: 0 28px 0 28px;
}
.card h3 { margin: 10px 0 8px; font-size: 20px; }
.card p { color: var(--mute); font-size: 15px; }
.card.main { border-color: var(--water); }
.icon {
    width: 42px;
    height: 10px;
    border-radius: 999px;
    background: var(--water);
}
.solution-card { padding: 0; overflow: hidden; }
.solution-card img { height: 176px; width: 100%; object-fit: cover; }
.solution-card div { padding: 16px 18px 20px; }
.price { color: var(--brick); margin-bottom: 8px; }

.cta {
    padding: 76px 0;
    text-align: center;
    background: var(--deep);
    color: #e8f2f4;
}
.cta h2 { font-size: 32px; margin-bottom: 12px; }
.cta p { color: #b7c8cc; margin-bottom: 22px; }
.cta .btn { background: #fff; color: var(--deep); }
.cta .btn-ghost { background: transparent; color: #fff; border-color: #fff; }
.cta-actions { display: flex; justify-content: center; gap: 14px; flex-wrap: wrap; }

.site-footer {
    padding: 48px 0 24px;
    background: var(--sand);
    border-top: 1px solid var(--line);
}
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 28px; }
.footer-grid h4 { margin-bottom: 12px; color: var(--water); }
.footer-grid a, .footer-grid p { display: block; color: var(--mute); margin-bottom: 8px; font-size: 14px; }
.footer-bottom {
    margin-top: 28px;
    padding-top: 16px;
    border-top: 1px solid var(--line);
    color: var(--mute);
    font-size: 13px;
}

.page-hero { padding: 64px 0 24px; }
.page-hero h1 { font-size: 36px; margin: 10px 0 12px; }
.page-hero p { color: var(--mute); max-width: 40em; }
.dl-list, .help-list { display: grid; gap: 14px; }
.dl-item, .help-box {
    padding: 22px 24px;
    border: 1px solid var(--line);
    background: #fffaf4;
    border-radius: 0 28px 0 28px;
}
.dl-item { display: flex; justify-content: space-between; gap: 20px; align-items: center; }
.dl-item.main { border-color: var(--water); }
.specs { display: flex; gap: 14px; color: var(--water); font-size: 13px; margin: 8px 0; }
.shot { margin-top: 28px; }
.shot img { width: 100%; border-radius: 0 80px 0 80px; }

@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;
    }
}