:root{
  --bg:#faf8f5;
  --paper:#ffffff;
  --ink:#1e1d1b;
  --ink-2:#4a4744;
  --ink-3:#7a7570;
  --line:#e6e1da;
  --accent:#c8452d;
  --accent-soft:#f6e9e5;
  --green:#1b5e46;
  --radius:4px;
  --wrap:1120px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg);
  color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:15px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px}

/* ---------- 顶部导航 ---------- */
.nav{
  position:sticky;top:0;z-index:50;
  background:rgba(250,248,245,.92);
  backdrop-filter:saturate(180%) blur(8px);
  border-bottom:1px solid var(--line);
}
.nav-inner{max-width:var(--wrap);margin:0 auto;padding:0 24px;height:64px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:baseline;gap:10px;flex-shrink:0}
.brand b{font-size:19px;letter-spacing:.5px;font-weight:800}
.brand span{font-size:11px;color:var(--ink-3);letter-spacing:1.5px;text-transform:uppercase}
.nav-links{display:flex;gap:28px;font-size:14px;color:var(--ink-2)}
.nav-links a{padding:4px 0;border-bottom:2px solid transparent}
.nav-links a:hover,.nav-links a.on{color:var(--accent);border-bottom-color:var(--accent)}
.nav-tel{font-size:14px;font-weight:700;color:var(--accent);white-space:nowrap}

/* ---------- Hero ---------- */
.hero{position:relative;height:min(72vh,560px);min-height:420px;overflow:hidden;background:#2a2724}
.hero img{width:100%;height:100%;object-fit:cover;opacity:.72}
.hero-mask{position:absolute;inset:0;background:linear-gradient(90deg,rgba(20,18,16,.82) 0%,rgba(20,18,16,.5) 46%,rgba(20,18,16,.12) 100%)}
.hero-body{position:absolute;inset:0;display:flex;align-items:center}
.hero-body .wrap{width:100%}
.hero-tag{display:inline-block;font-size:12px;letter-spacing:2px;color:#f0d9cf;border:1px solid rgba(240,217,207,.5);padding:5px 12px;margin-bottom:20px}
.hero h1{color:#fff;font-size:clamp(26px,4vw,44px);line-height:1.3;font-weight:800;letter-spacing:.5px;max-width:640px}
.hero p{color:#d9d3cb;margin-top:18px;max-width:560px;font-size:15px}
.hero-acts{display:flex;gap:14px;margin-top:32px;flex-wrap:wrap}
.btn{display:inline-block;padding:12px 26px;border-radius:var(--radius);font-size:14px;font-weight:600;transition:.2s}
.btn-main{background:var(--accent);color:#fff}
.btn-main:hover{background:#a93722}
.btn-ghost{border:1px solid rgba(255,255,255,.55);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.12)}

/* ---------- 数字条 ---------- */
.stats{border-bottom:1px solid var(--line);background:var(--paper)}
.stats .wrap{display:grid;grid-template-columns:repeat(4,1fr)}
.stat{padding:30px 4px;text-align:center;border-right:1px solid var(--line)}
.stat:last-child{border-right:0}
.stat b{display:block;font-size:30px;font-weight:800;color:var(--accent);line-height:1.2;letter-spacing:-.5px}
.stat span{font-size:12.5px;color:var(--ink-3);letter-spacing:.5px}

/* ---------- 通用区块 ---------- */
.sec{padding:74px 0}
.sec.alt{background:var(--paper);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{margin-bottom:40px;max-width:760px}
.eyebrow{font-size:12px;letter-spacing:2.5px;color:var(--accent);font-weight:700;text-transform:uppercase;margin-bottom:10px}
.sec-head h2{font-size:clamp(22px,2.6vw,30px);font-weight:800;line-height:1.35;letter-spacing:.3px}
.sec-head p{color:var(--ink-2);margin-top:14px;font-size:14.5px}

/* ---------- 两栏业务 ---------- */
.duo{display:grid;grid-template-columns:1fr 1fr;gap:28px}
.card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.card-img{height:230px;overflow:hidden;background:#eee}
.card-img img{width:100%;height:100%;object-fit:cover;transition:.5s}
.card:hover .card-img img{transform:scale(1.04)}
.card-body{padding:26px 24px 28px}
.card-body h3{font-size:19px;font-weight:800;margin-bottom:6px}
.card-body .sub{font-size:12px;color:var(--accent);letter-spacing:1.5px;font-weight:700;margin-bottom:12px}
.card-body p{color:var(--ink-2);font-size:14px}
.card-body ul{margin:14px 0 0;padding-left:0;list-style:none}
.card-body li{font-size:13.5px;color:var(--ink-2);padding-left:16px;position:relative;margin-bottom:5px}
.card-body li::before{content:"";position:absolute;left:0;top:11px;width:5px;height:5px;background:var(--accent);border-radius:50%}
.card-link{display:inline-block;margin-top:20px;font-size:13.5px;font-weight:700;color:var(--accent)}
.card-link::after{content:" →"}

/* ---------- 图集 ---------- */
.gallery{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.gallery figure{position:relative;overflow:hidden;border-radius:var(--radius);background:#eee;aspect-ratio:4/3}
.gallery img{width:100%;height:100%;object-fit:cover}
.gallery figcaption{position:absolute;left:0;right:0;bottom:0;padding:18px 12px 10px;font-size:12px;color:#fff;background:linear-gradient(transparent,rgba(0,0,0,.72))}

/* ---------- 规格表 ---------- */
.tbl{width:100%;border-collapse:collapse;background:var(--paper);font-size:14px}
.tbl th,.tbl td{text-align:left;padding:13px 16px;border-bottom:1px solid var(--line)}
.tbl th{width:34%;color:var(--ink-3);font-weight:600;background:#fbfaf8;font-size:13px}
.tbl tr:last-child th,.tbl tr:last-child td{border-bottom:0}

/* ---------- 流程 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border:1px solid var(--line);background:var(--paper);border-radius:var(--radius);overflow:hidden}
.step{padding:28px 22px;border-right:1px solid var(--line)}
.step:last-child{border-right:0}
.step i{font-style:normal;font-size:12px;font-weight:800;color:var(--accent);letter-spacing:1px;display:block;margin-bottom:10px}
.step h4{font-size:15px;font-weight:700;margin-bottom:8px}
.step p{font-size:13px;color:var(--ink-2)}

/* ---------- 资质 ---------- */
.creds{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.cred{border:1px solid var(--line);background:var(--paper);border-radius:var(--radius);padding:24px}
.cred .k{font-size:12px;color:var(--ink-3);letter-spacing:1px;margin-bottom:8px}
.cred .v{font-size:15px;font-weight:700;line-height:1.55;word-break:break-all}
.note{margin-top:26px;font-size:13px;color:var(--ink-3);border-left:3px solid var(--accent);padding:10px 0 10px 14px;background:#fdf7f5}

/* ---------- FAQ ---------- */
.faq{max-width:820px}
.faq details{border-bottom:1px solid var(--line);padding:18px 0}
.faq summary{cursor:pointer;font-weight:700;font-size:15px;list-style:none;position:relative;padding-right:26px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:0;top:-2px;color:var(--accent);font-size:20px;font-weight:400}
.faq details[open] summary::after{content:"–"}
.faq p{margin-top:12px;color:var(--ink-2);font-size:14px}

/* ---------- 联系 ---------- */
.contact-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:40px}
.contact-list{list-style:none}
.contact-list li{padding:16px 0;border-bottom:1px solid var(--line);display:flex;gap:20px;font-size:14.5px}
.contact-list li span{color:var(--ink-3);width:74px;flex-shrink:0;font-size:13px}
.contact-list li b{font-weight:700}
.map-box{border:1px solid var(--line);background:var(--paper);border-radius:var(--radius);padding:30px;display:flex;flex-direction:column;justify-content:center;min-height:260px}
.map-box .big{font-size:16px;font-weight:800;margin-bottom:8px}
.map-box p{font-size:13.5px;color:var(--ink-2)}

/* ---------- CTA ---------- */
.cta{background:#211f1d;color:#fff;padding:64px 0;text-align:center}
.cta h2{font-size:clamp(21px,2.4vw,28px);font-weight:800}
.cta p{color:#b9b3ab;margin-top:12px;font-size:14.5px}
.cta .btn-main{margin-top:28px}

/* ---------- 页脚 ---------- */
.foot{background:#171614;color:#8d8781;font-size:12.5px;padding:40px 0 34px}
.foot .wrap{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap}
.foot b{color:#d8d2ca;font-weight:700}
.foot a:hover{color:#fff}

/* ---------- 内页头 ---------- */
.pagehead{padding:64px 0 48px;border-bottom:1px solid var(--line);background:var(--paper)}
.pagehead .eyebrow{margin-bottom:12px}
.pagehead h1{font-size:clamp(24px,3vw,34px);font-weight:800;line-height:1.35}
.pagehead p{color:var(--ink-2);margin-top:14px;max-width:720px;font-size:14.5px}

/* ---------- 响应式 ---------- */
@media (max-width:900px){
  .nav-links{display:none}
  .stats .wrap{grid-template-columns:repeat(2,1fr)}
  .stat:nth-child(2){border-right:0}
  .stat{border-bottom:1px solid var(--line)}
  .duo,.contact-grid{grid-template-columns:1fr}
  .gallery{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:1fr 1fr}
  .step{border-bottom:1px solid var(--line)}
  .creds{grid-template-columns:1fr}
  .sec{padding:54px 0}
}