:root{--sun:#EA580C;--warm:#F5F5F4;--brown:#431407;--ink:#1C1917;--line:#D6D3D1}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:"Optima","Segoe UI","PingFang SC",sans-serif;background:var(--warm);color:var(--ink);line-height:1.75;font-size:16px}
a{color:inherit;text-decoration:none}
svg{display:block}
.wrap{width:min(1120px,calc(100% - 40px));margin:0 auto}
header{background:var(--warm);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.bar{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:70px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--brown);font-size:18px}
nav{display:flex;flex-wrap:wrap;gap:8px}
nav a{font-size:13px;color:var(--brown);border:1px solid var(--brown);padding:6px 12px;background:#fff}
nav a:hover{background:var(--sun);color:#fff;border-color:var(--sun)}
.hero{padding:48px 0 28px}
.hero h1{font-size:34px;line-height:1.28;margin-bottom:16px;max-width:16em;color:var(--brown)}
.hero p{max-width:44em;margin-bottom:10px;color:#44403C}
.tiles{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:28px}
.tile{background:#fff;padding:22px;min-height:220px;border:1px solid var(--line)}
.tile .art{height:110px;margin-bottom:14px;color:var(--sun)}
.tile h3{font-size:18px;margin-bottom:8px;color:var(--brown)}
.tile p{color:#57534E;font-size:15px}
.barsec{padding:22px 0}
.deep{background:#fff;border-left:8px solid var(--sun);padding:28px 32px;margin:18px 0}
.deep h2{font-size:24px;margin-bottom:12px;color:var(--brown)}
.deep p{margin-bottom:10px;color:#44403C;max-width:52em}
.sec{padding:28px 0}
.sec h2{font-size:24px;margin-bottom:12px;color:var(--brown)}
.lead{margin-bottom:14px;color:#57534E;max-width:46em}
.ssteps{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.sstep{background:#fff;padding:20px;border-top:4px solid var(--sun)}
.sstep .n{font-size:28px;color:var(--sun);font-weight:700;margin-bottom:8px}
.sstep h3{font-size:17px;margin-bottom:8px}
.sstep p{font-size:14px;color:#57534E}
table{width:100%;border-collapse:collapse;background:#fff}
th,td{border:1px solid var(--line);padding:12px 14px;text-align:left;vertical-align:top;font-size:14px}
th{background:var(--brown);color:#F5F5F4}
.hist{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.hist article{background:#fff;padding:22px}
.s-faq{background:#fff;margin:12px 0;padding:0 0 12px}
.s-faq summary{cursor:pointer;font-weight:700;padding:12px 14px;display:flex;align-items:center;gap:10px}
.faq-tag{display:inline-flex;align-items:center;justify-content:center;min-width:28px;height:22px;background:var(--sun);color:#fff;font-size:12px;font-weight:700;padding:0 6px}
.faq-tag::before{content:"问"}
.faq-body{padding:0 14px 4px 52px}
footer{background:var(--brown);color:#E7E5E4;margin-top:36px;padding:28px 0}
.ft p{margin-bottom:8px;font-size:14px}
@media (max-width:900px){
.tiles,.ssteps,.hist{grid-template-columns:1fr}
.bar{flex-direction:column;align-items:flex-start;padding:12px 0}
}