/* 官网首页(www.holowild.app/): 设计稿 C「光谱探索」浅色风, 与 App 一致 */
:root {
    --bg: #eef5fb;
    --surface: #ffffff;
    --surface2: #f6f9fc;
    --line: #d6e1ec;
    --text: #1c2440;
    --muted: #5d6a85;
    --accent: #f2705e;
    --serif: "Iowan Old Style", Georgia, "Songti SC", "SimSun", serif;
    --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    --mono: ui-monospace, Menlo, Consolas, monospace;
    --wrap: 1120px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { background: var(--bg); color: var(--text); font-family: var(--sans); line-height: 1.6; -webkit-font-smoothing: antialiased; }
a { color: inherit; }

.top {
    position: sticky; top: 0; z-index: 10;
    display: flex; align-items: center; justify-content: space-between;
    max-width: var(--wrap); margin: 0 auto; padding: 14px 24px;
    background: var(--bg); border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; font-family: var(--serif); font-size: 20px; }
.brand img { border-radius: 7px; }
.top-nav { display: flex; align-items: center; gap: 22px; font-size: 14px; }
.top-nav a { text-decoration: none; color: var(--muted); }
.top-nav a:hover { color: var(--text); }
.lang { background: none; border: 1px solid var(--line); color: var(--text); border-radius: 5px; padding: 5px 10px; font: inherit; cursor: pointer; }
.lang:hover { border-color: var(--muted); }

main, .foot { max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }
section { padding: 72px 0; border-bottom: 1px solid var(--line); }
h1, h2, h3 { font-family: var(--serif); font-weight: 400; letter-spacing: -0.01em; }
h2 { font-size: 34px; margin-bottom: 32px; }

.hero { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; padding-top: 56px; }
.eyebrow { font-family: var(--mono); font-size: 12px; letter-spacing: .14em; text-transform: uppercase; color: var(--muted); margin-bottom: 18px; }
.hero h1 { font-size: 56px; line-height: 1.08; margin-bottom: 20px; }
.lead { font-size: 18px; color: var(--muted); max-width: 30em; margin-bottom: 32px; }
.stores { display: flex; gap: 12px; flex-wrap: wrap; }
.store {
    display: flex; flex-direction: column; justify-content: center; min-width: 170px; padding: 10px 18px;
    border: 1px solid var(--text); border-radius: 6px; text-decoration: none; line-height: 1.2;
}
.store:first-child { background: var(--text); color: var(--bg); }
.store-small { font-size: 11px; }
.store-big { font-size: 20px; font-weight: 600; }
.store:hover { opacity: .88; }

.hero-stage { position: relative; height: 520px; perspective: 1400px; overflow: hidden; }
.card {
    position: absolute; top: 40px; left: 50%; width: 250px; aspect-ratio: 63 / 88; object-fit: cover;
    border-radius: 12px; box-shadow: 0 30px 50px rgba(28, 36, 64, .22);
    transition: transform .25s ease-out;
}
.c1 { transform: translateX(-118%) translateY(28px) rotate(-9deg) scale(.86); opacity: .9; }
.c3 { transform: translateX(18%) translateY(28px) rotate(9deg) scale(.86); opacity: .9; }
.c2 { z-index: 2; transform: translateX(-50%) rotateY(var(--ry, -8deg)) rotateX(var(--rx, 4deg)); }
.plinth {
    position: absolute; left: 50%; bottom: 36px; width: 300px; height: 26px; transform: translateX(-50%);
    background: #000; border-radius: 50%; filter: blur(14px); opacity: .8;
}

.grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 6px; overflow: hidden; }
.grid article { background: var(--surface); padding: 28px 24px; }
.num { font-family: var(--mono); font-size: 12px; color: var(--accent); }
.grid h3 { font-size: 21px; margin: 10px 0 8px; }
.grid p { color: var(--muted); font-size: 15px; }

.how ol { list-style: none; display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; counter-reset: step; }
.how li { counter-increment: step; border-top: 1px solid var(--text); padding-top: 18px; }
.how li::before { content: counter(step, decimal-leading-zero); display: block; font-family: var(--mono); font-size: 12px; color: var(--muted); margin-bottom: 8px; }
.how strong { display: block; font-family: var(--serif); font-weight: 400; font-size: 22px; margin-bottom: 4px; }
.how span { color: var(--muted); }

.contact { font-size: 18px; margin-bottom: 28px; }
.contact a { color: var(--accent); margin-left: 6px; }
.faq details { border-top: 1px solid var(--line); padding: 18px 0; }
.faq details:last-child { border-bottom: 1px solid var(--line); }
.faq summary { cursor: pointer; font-size: 17px; list-style: none; display: flex; justify-content: space-between; gap: 16px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--muted); font-family: var(--mono); }
.faq details[open] summary::after { content: "\2212"; }
.faq p { color: var(--muted); margin-top: 10px; max-width: 46em; }

.foot { display: flex; flex-wrap: wrap; gap: 24px; padding: 32px 24px 48px; font-size: 13px; color: var(--muted); }
.foot a { color: var(--muted); text-decoration: none; }
.foot a:hover { color: var(--text); }

@media (max-width: 860px) {
    .hero { grid-template-columns: 1fr; padding-top: 32px; gap: 8px; }
    .hero h1 { font-size: 40px; }
    .hero-stage { height: 400px; }
    .card { width: 190px; }
    .grid { grid-template-columns: 1fr 1fr; }
    .how ol { grid-template-columns: 1fr; }
    .top-nav a { display: none; }
    section { padding: 52px 0; }
}
@media (max-width: 520px) {
    .grid { grid-template-columns: 1fr; }
    .card { width: 160px; }
    .hero-stage { height: 330px; }
    .store { flex: 1; }
}