*{box-sizing:border-box;margin:0;padding:0}
:root{--red:#C73B2B;--dark:#2C2C2C;--bg:#F8F6F3;--gold:#E8A838;--line:#e7e0d8}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
color:var(--dark);background:var(--bg);line-height:1.7;-webkit-text-size-adjust:100%}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
.wrap{width:100%;max-width:1120px;margin:0 auto;padding:0 16px}
.narrow{max-width:820px}
/* header */
.hd{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 1px 6px rgba(0,0,0,.04)}
.hdin{display:flex;align-items:center;gap:16px;height:60px}
.logo{font-size:19px;font-weight:800;white-space:nowrap}
.logo b{color:var(--red)}
.logo span{display:none}
.nav{display:flex;gap:18px;margin-left:auto;font-size:15px}
.nav a{padding:6px 2px;color:#555}
.nav a.on,.nav a:hover{color:var(--red);border-bottom:2px solid var(--red)}
.hdtel{background:var(--red);color:#fff;padding:8px 14px;border-radius:6px;font-weight:700;font-size:15px;white-space:nowrap}
/* hero */
.hero{background-size:cover;background-position:center;color:#fff;padding:64px 0 56px}
.hero h1{font-size:30px;line-height:1.3;letter-spacing:.5px}
.hero .sub{font-size:17px;margin-top:12px;color:#ffe9c7}
.hero .sub b{color:var(--gold);font-size:22px}
.hero .sub2{font-size:14.5px;color:#ded4cc;margin-top:6px}
.hbtns{display:flex;gap:12px;margin-top:22px;flex-wrap:wrap}
.btn{display:inline-block;padding:13px 26px;border-radius:8px;font-weight:700;font-size:16px;text-align:center}
.btnP{background:var(--red);color:#fff;box-shadow:0 4px 14px rgba(199,59,43,.32)}
.btnG{background:rgba(255,255,255,.16);color:#fff;border:1px solid rgba(255,255,255,.55)}
.btnO{background:#fff;color:var(--red);border:2px solid var(--red)}
/* advantages */
.adv{background:#fff;border-bottom:1px solid var(--line);padding:26px 0}
.advgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.advc{text-align:center}
.advc i{font-style:normal;font-size:24px;display:block}
.advc b{display:block;font-size:15.5px;margin:4px 0 2px}
.advc span{font-size:12.5px;color:#777;line-height:1.5}
/* sections */
.sec{padding:44px 0}
.sec.alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec h2{font-size:22px;margin-bottom:8px}
.sec h2 em{color:var(--red);font-style:normal}
.lead{color:#777;font-size:14px;margin-bottom:20px}
.more{text-align:center;margin-top:22px}
/* category cards */
.cats{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.cat{background:#fff;border:1px solid var(--line);border-radius:10px;overflow:hidden;display:block;transition:.18s}
.cat:hover{transform:translateY(-2px);box-shadow:0 8px 22px rgba(0,0,0,.09)}
.catimg{aspect-ratio:4/3;background:#efeae4;overflow:hidden}
.catimg img{width:100%;height:100%;object-fit:cover}
.catimg .ph{display:flex;align-items:center;justify-content:center;height:100%;color:#b3a89c;font-weight:700}
.catinfo{padding:10px 12px;display:flex;justify-content:space-between;align-items:baseline}
.catinfo b{font-size:15.5px}
.catinfo span{font-size:13px;color:var(--red);font-weight:700}
/* steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.steps.v{grid-template-columns:1fr 1fr}
.steps>div{background:#fff;border:1px solid var(--line);border-radius:10px;padding:16px}
.steps em{font-style:normal;display:inline-flex;width:26px;height:26px;border-radius:50%;background:var(--red);color:#fff;
align-items:center;justify-content:center;font-weight:800;font-size:14px;margin-bottom:8px}
.steps b{display:block;font-size:15.5px;margin-bottom:4px}
.steps span{font-size:13px;color:#777}
/* 常见问题：用 details/summary，不依赖 JS 就能展开；也是 FAQ 结构化数据对应的可见内容
   （搜索引擎要求"标记的问答必须在页面上看得到"，否则算作弊） */
.faq{max-width:840px;margin:0 auto}
.faq details{border-bottom:1px solid var(--line);padding:16px 0}
.faq details:first-child{border-top:1px solid var(--line)}
.faq summary{font-weight:600;font-size:16px;cursor:pointer;list-style:none;position:relative;padding-left:22px}
.faq summary::-webkit-details-marker{display:none}
.faq summary:before{content:"+";position:absolute;left:0;top:-1px;color:var(--red);font-weight:700;font-size:18px}
.faq details[open] summary:before{content:"–"}
.faq p{margin:12px 0 0 22px;color:#5a6270;line-height:1.9;font-size:14.5px}
/* cta */
.cta{text-align:center;background:#fff;border:1px solid var(--line);border-radius:14px;padding:36px 20px}
.cta p{color:#666;margin:10px 0 0;font-size:15px}
.cta .hbtns{justify-content:center}
/* page hero */
.ph{background:var(--dark);color:#fff;padding:38px 0}
.ph h1{font-size:26px}
.ph p{color:#c9c2bb;font-size:14.5px;margin-top:8px}
/* category block */
.catblk{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px;margin-bottom:16px}
.catblkh{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}
.catblkh h2{font-size:18px}
.catblkh h2 em{color:var(--red);font-style:normal;font-size:14px}
.mini{color:var(--red);font-weight:700;font-size:14px}
.catblk img{width:100%;max-height:340px;object-fit:cover;border-radius:8px;margin-bottom:10px}
.sublist{list-style:none;display:grid;grid-template-columns:repeat(3,1fr);gap:6px 14px}
.sublist li{font-size:14px;color:#555;display:flex;justify-content:space-between;
border-bottom:1px dashed #eee;padding:5px 0}
.sublist em{font-style:normal;color:#999;font-size:13px}
.note{margin-top:18px;background:#fff8e8;border:1px solid #f0dfb8;border-radius:8px;padding:12px 14px;
font-size:13.5px;color:#8a6d1f}
/* about */
.dots{list-style:none;margin:12px 0 22px}
.dots li{position:relative;padding-left:18px;margin-bottom:10px;font-size:15px;color:#444}
.dots li:before{content:"";position:absolute;left:0;top:11px;width:7px;height:7px;border-radius:50%;background:var(--gold)}
.sec p{font-size:15px;color:#444;margin-bottom:12px}
.sec h2{margin-top:26px}
/* contact */
.ctgrid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:22px}
.ctc{background:#fff;border:1px solid var(--line);border-radius:10px;padding:16px}
.ctc b{display:block;font-size:13px;color:#999;font-weight:600;margin-bottom:6px}
.ctc .big{font-size:26px;font-weight:800;color:var(--red);letter-spacing:.5px}
.ctc .big2{font-size:16px;font-weight:700;display:block;line-height:1.5}
.ctc span{display:block;font-size:13px;color:#888;margin-top:6px}
.mapbox{text-align:center;margin:6px 0 10px}
/* footer */
.ft{background:#262322;color:#b7b0aa;padding:34px 0 76px;font-size:13.5px;line-height:1.9;margin-top:34px}
.ft strong{color:#fff;font-size:15px}
.ft a{color:var(--gold)}
.ftgrid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:24px}
.ftbot{border-top:1px solid #3a3634;margin-top:22px;padding-top:14px;display:flex;gap:18px;
flex-wrap:wrap;font-size:12.5px;color:#8d8681}
.ftbot a{color:#8d8681}
.ftbot a:hover{color:var(--gold)}
/* mobile bottom bar */
.bar{position:fixed;left:0;right:0;bottom:0;display:none;z-index:60;
border-top:1px solid var(--line);background:#fff}
.bar a{flex:1;text-align:center;padding:13px 0;font-weight:700;font-size:15px}
.bar .b1{background:var(--red);color:#fff}
.bar .b2{color:var(--red)}
/* responsive */
@media(max-width:860px){
  .advgrid{grid-template-columns:1fr 1fr;gap:16px}
  .cats{grid-template-columns:1fr 1fr}
  .steps,.steps.v{grid-template-columns:1fr 1fr}
  .ftgrid{grid-template-columns:1fr}
  .ctgrid{grid-template-columns:1fr}
  .sublist{grid-template-columns:1fr 1fr}
  .nav{display:none}
  .hdtel{margin-left:auto;font-size:14px;padding:7px 11px}
  .hero{padding:44px 0 40px}
  .hero h1{font-size:24px}
  .hero .sub{font-size:15px}
  .bar{display:flex}
  .sec{padding:32px 0}
  .sec h2{font-size:19px}
  .catblk img{max-height:220px}
}
@media(max-width:420px){.cats{grid-template-columns:1fr}}