@charset "utf-8";
/* ============================================================
   冀森木业 官网 · 多页版共用样式
   设计语言：清水混凝土板缝与对拉螺栓孔 + 木材原色
   ============================================================ */
:root{
  --ink:#0F1513;
  --pine:#17332B;
  --pine-2:#22463A;
  --timber:#A8703C;
  --paper:#EDEEE9;
  --panel:#F6F6F2;
  --steel:#6C7A72;
  --line:#C7CDC5;
  --line-strong:#9AA69D;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button,input,textarea,select{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.18;letter-spacing:-.015em}
h2{font-size:clamp(25px,4.2vw,40px)}
h3{font-size:19px;line-height:1.4}
p{margin:0}
.wrap{width:100%;max-width:1280px;margin:0 auto;padding:0 20px}
@media(min-width:900px){.wrap{padding:0 44px}}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;background:rgba(237,238,233,.94);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.hd{display:flex;align-items:center;justify-content:space-between;gap:16px;height:62px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;letter-spacing:.02em}
.brand svg{width:26px;height:26px;flex:none}
.brand span{font-size:17px}
.brand em{font-style:normal;font-size:11px;color:var(--steel);letter-spacing:.14em;display:block;line-height:1;margin-top:3px}
.nav-links{display:none;gap:28px;font-size:15px}
.nav-links a{padding:8px 0;border-bottom:2px solid transparent;color:#2A3530;transition:color .2s,border-color .2s}
.nav-links a:hover{color:var(--timber)}
.nav-links a[aria-current="page"]{border-color:var(--timber);color:var(--ink)}
.tel{display:none;align-items:center;gap:10px;padding-left:24px;border-left:1px solid var(--line)}
.tel small{display:block;font-size:11px;color:var(--steel);line-height:1.2;letter-spacing:.06em}
.tel b{font-size:19px;letter-spacing:.02em;font-variant-numeric:tabular-nums}
@media(min-width:900px){.nav-links{display:flex}.tel{display:flex}}
.menu-btn{display:inline-flex;align-items:center;gap:8px;height:44px;padding:0 2px;background:none;border:0;font-size:14px;color:#2A3530}
@media(min-width:900px){.menu-btn{display:none}}
.menu-btn svg{width:20px;height:20px}
.mobile-menu{display:none;border-top:1px solid var(--line);background:var(--paper);padding:8px 0 18px}
.mobile-menu.open{display:block}
.mobile-menu a{display:block;padding:13px 2px;border-bottom:1px solid var(--line);font-size:16px}
.mobile-menu a[aria-current="page"]{color:var(--timber);font-weight:700}
.mobile-menu .m-tel{padding-top:16px;color:var(--steel);font-size:13px}
.mobile-menu .m-tel b{display:block;font-size:22px;color:var(--ink);margin-top:4px}

/* ---------- 首页首屏 ---------- */
.hero{position:relative;min-height:82vh;display:flex;align-items:flex-end;overflow:hidden;background:#303A35}
.hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center 34%}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(15,21,19,.3) 0%,rgba(15,21,19,.52) 42%,rgba(15,21,19,.88) 100%)}
.hero-inner{position:relative;z-index:2;width:100%;padding-bottom:34px;color:#F4F2EA}
@media(min-width:900px){.hero-inner{padding-bottom:52px}}
.hero h1{font-size:clamp(27px,5.6vw,74px);line-height:1.16;letter-spacing:-.03em}
.hero .sub{margin-top:18px;max-width:46ch;color:#CFD6CF;font-size:15px}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:48px;padding:0 22px;border:1px solid transparent;border-radius:0;
  background:var(--timber);color:#fff;font-weight:700;font-size:15px;
  transition:background .2s,border-color .2s,color .2s;
}
.btn:hover{background:#8E5C2E}
.btn.ghost{background:transparent;border-color:rgba(244,242,234,.55);color:#F4F2EA;font-weight:400}
.btn.ghost:hover{background:rgba(244,242,234,.12)}
.spec-strip{display:grid;grid-template-columns:repeat(2,1fr);gap:14px 20px;margin-top:28px;border-top:1px solid rgba(255,255,255,.28);padding-top:16px}
.spec-strip dt{font-size:11px;letter-spacing:.1em;color:#A9B5AC}
.spec-strip dd{margin:4px 0 0;font-size:20px;font-weight:700;color:#F4F2EA;font-variant-numeric:tabular-nums}
@media(min-width:760px){.spec-strip{grid-template-columns:repeat(4,1fr)}}
.bolts{display:flex;gap:14px;margin-bottom:16px}
.bolts i{width:9px;height:9px;border-radius:50%;background:rgba(255,255,255,.45);display:block}
.bolts i:nth-child(2){background:var(--timber)}

/* ---------- 内页题头 ---------- */
.page-hero{background:var(--pine);color:#F2F0E8;padding:30px 0 34px}
.page-hero .crumb{font-size:12.5px;color:#93A597;letter-spacing:.04em}
.page-hero .crumb a{color:#C0CFC3}
.page-hero .crumb a:hover{color:#fff}
.page-hero h1{font-size:clamp(26px,4.6vw,44px);margin-top:12px}
.page-hero p{color:#B7C4BA;font-size:14.5px;margin-top:12px;max-width:62ch}

/* ---------- 区块标题 ---------- */
.sec{padding:48px 0}
@media(min-width:900px){.sec{padding:76px 0}}
.sec-head{
  display:grid;grid-template-columns:1fr auto;gap:8px 24px;align-items:end;
  padding-top:14px;margin-bottom:28px;border-top:2px solid var(--ink);
}
.sec-head .lab{grid-column:1;grid-row:1;display:flex;align-items:center;gap:10px;font-size:12px;letter-spacing:.12em;color:var(--steel)}
.sec-head h2{grid-column:1 / -1;grid-row:2;max-width:18em}
.sec-head .more{grid-column:2;grid-row:1;justify-self:end;font-size:13.5px;color:var(--steel);border-bottom:1px solid var(--line-strong);padding-bottom:2px}
.sec-head .more:hover{color:var(--timber);border-color:var(--timber)}
.lead{max-width:64ch;color:#38433D}
.lead em{font-style:normal;color:var(--timber);font-weight:700}

/* ---------- 版式 ---------- */
.intro{display:grid;gap:22px;grid-template-columns:1fr;align-items:start}
.intro2{display:grid;gap:18px;grid-template-columns:1fr}
.contact-grid{display:grid;gap:32px;grid-template-columns:1fr}
@media(min-width:900px){
  .intro{grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:56px}
  .intro2{grid-template-columns:repeat(2,1fr);gap:44px}
}
@media(min-width:960px){.contact-grid{grid-template-columns:1fr 1fr;gap:64px}}

/* ---------- 产品卡 ---------- */
.grid-4{display:grid;gap:18px;grid-template-columns:1fr}
@media(min-width:640px){.grid-4{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1080px){.grid-4{grid-template-columns:repeat(4,1fr)}}
.pcard{background:var(--panel);border:1px solid var(--line);display:flex;flex-direction:column}
.pcard .ph{position:relative;aspect-ratio:4/3;overflow:hidden;background:#DDE1DA}
.pcard .ph img{width:100%;height:100%;object-fit:cover;transition:transform .6s cubic-bezier(.2,.7,.2,1)}
.pcard:hover .ph img{transform:scale(1.04)}
.pcard .ph .tag{position:absolute;left:0;bottom:0;background:var(--pine);color:#EAEDE6;font-size:11px;letter-spacing:.1em;padding:5px 10px}
.pcard .body{padding:18px 18px 20px;flex:1;display:flex;flex-direction:column;gap:10px}
.pcard dl{margin:0;display:grid;grid-template-columns:auto 1fr;gap:5px 12px;font-size:13px;color:var(--steel)}
.pcard dl dt{white-space:nowrap}
.pcard dl dd{margin:0;color:#2B3631}
.pcard .go{margin-top:auto;padding-top:12px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--pine);font-weight:700}
.pcard .go svg{width:16px;height:16px}

/* ---------- 产品明细 ---------- */
.prow{display:grid;gap:20px;grid-template-columns:1fr}
.prow + .prow{margin-top:34px;padding-top:34px;border-top:1px solid var(--line)}
@media(min-width:900px){
  .prow{grid-template-columns:minmax(0,1fr) minmax(0,1.25fr);gap:48px;align-items:start}
  .prow + .prow{margin-top:44px;padding-top:44px}
}
.prow-img img{width:100%;aspect-ratio:4/3;object-fit:cover}
.prow-top{display:flex;align-items:baseline;gap:12px}
.tag2{font-size:12px;color:var(--steel);font-variant-numeric:tabular-nums;letter-spacing:.08em}
.prow table{width:100%;border-collapse:collapse;table-layout:fixed;font-size:14px}
.prow th{width:34%;text-align:left;font-weight:400;color:var(--steel);padding:10px 0;border-bottom:1px solid var(--line);vertical-align:top}
.prow td{width:66%;padding:10px 0;border-bottom:1px solid var(--line);color:#222D28}

/* ---------- 案例 ---------- */
.case-rows{border-top:1px solid var(--line)}
.case-row{display:grid;gap:6px 18px;padding:20px 0;border-bottom:1px solid var(--line);grid-template-columns:1fr;align-items:baseline}
.case-row:hover{background:rgba(168,112,60,.06)}
.case-row .yr{font-size:13px;color:var(--steel);font-variant-numeric:tabular-nums;letter-spacing:.06em}
.case-row h3{font-size:18px}
.case-row h3 a:hover{color:var(--timber)}
.case-row .meta{font-size:13px;color:var(--steel)}
.case-row .qty{font-size:13px;color:var(--pine);font-weight:700}
@media(min-width:820px){
  .case-row{grid-template-columns:78px 1fr 200px 150px;padding:24px 0}
  .case-row h3{font-size:20px}
}

/* ---------- 工序 ---------- */
.steps{margin-top:8px}
.step{display:grid;grid-template-columns:34px 22px 1fr;align-items:start;padding-bottom:22px}
.step .no{font-size:12px;color:var(--steel);font-variant-numeric:tabular-nums;padding-top:2px;text-align:right;padding-right:8px}
.step .dot{position:relative;display:flex;justify-content:center}
.step .dot::before{content:"";position:absolute;top:9px;bottom:-22px;width:1px;background:var(--line-strong)}
.step .dot i{width:9px;height:9px;border-radius:50%;background:var(--pine);margin-top:5px;position:relative;z-index:1}
.step:last-child .dot::before{display:none}
.step h4{font-size:16px;margin:0 0 3px}
.step p{font-size:13.5px;color:#46524B;max-width:42ch}
.factory-grid{display:grid;gap:28px;grid-template-columns:1fr;margin-top:36px;align-items:start}
.factory-grid img{width:100%;height:100%;min-height:280px;object-fit:cover}
@media(min-width:900px){.factory-grid{grid-template-columns:1fr 1fr;gap:48px}}
.qual-grid{display:grid;gap:16px;grid-template-columns:1fr}
@media(min-width:640px){.qual-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1080px){.qual-grid{grid-template-columns:repeat(4,1fr)}}
.qbox{background:var(--panel);border:1px solid var(--line);padding:20px}
.qbox p{font-size:14px;color:#46524B;margin-top:8px}

/* ---------- 资讯 ---------- */
.news-item{border-bottom:1px solid var(--line)}
.news-btn{width:100%;background:none;border:0;text-align:left;cursor:pointer;display:grid;gap:4px 20px;padding:18px 0}
.news-btn .d{font-size:12.5px;color:var(--steel);font-variant-numeric:tabular-nums}
.news-btn h3{font-size:17px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.news-btn h3 svg{width:16px;height:16px;flex:none;transition:transform .25s;color:var(--steel)}
.news-btn[aria-expanded="true"] h3 svg{transform:rotate(45deg);color:var(--timber)}
.news-btn[aria-expanded="true"]{background:rgba(168,112,60,.05)}
.news-body{display:none;padding:0 0 22px;font-size:14.5px;color:#3B463F;max-width:68ch}
.news-body.open{display:block}
@media(min-width:820px){.news-btn{grid-template-columns:110px 1fr}}

/* ---------- 表单 ---------- */
.field{display:block;margin-bottom:16px}
.field span{display:block;font-size:12.5px;letter-spacing:.06em;color:var(--steel);margin-bottom:6px}
.field input,.field textarea,.field select{width:100%;padding:12px 14px;border:1px solid var(--line-strong);border-radius:0;background:#fff;font-size:16px}
.field input:focus,.field textarea:focus,.field select:focus{outline:2px solid var(--pine);outline-offset:1px}
.field textarea{min-height:104px;resize:vertical}
.form-note{font-size:12.5px;color:var(--steel);margin-top:10px;line-height:1.6}
.info-list{border-top:2px solid var(--ink);padding-top:16px}
.info-list .row{display:grid;grid-template-columns:88px 1fr;gap:12px;padding:14px 0;border-bottom:1px solid var(--line)}
.info-list .row small{font-size:12.5px;color:var(--steel);letter-spacing:.06em}
.info-list .row div{font-size:15.5px}

/* ---------- CTA / 页脚 ---------- */
.cta-band{background:var(--ink);color:#F2F0E8;padding:44px 0}
.cta-band .wrap{display:flex;flex-wrap:wrap;gap:22px;align-items:center;justify-content:space-between}
.cta-band h2{font-size:clamp(23px,3.8vw,36px);max-width:24ch}
.cta-band p{font-size:14px;color:#A8B3AA;margin-top:8px}
.site-footer{background:var(--pine);color:#DDE3DA;padding:48px 0 24px}
.f-grid{display:grid;gap:28px;grid-template-columns:1fr}
@media(min-width:820px){.f-grid{grid-template-columns:1.4fr 1fr 1fr}}
.site-footer h4{font-size:13px;letter-spacing:.12em;color:#96A79A;margin-bottom:12px;font-weight:400}
.site-footer .f-brand{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:700;color:#F1F3EC;margin-bottom:10px}
.site-footer .f-brand svg{width:24px;height:24px}
.site-footer p,.site-footer a{font-size:13.5px;color:#B9C6BB;line-height:1.9}
.site-footer a:hover{color:#fff}
.f-bottom{margin-top:32px;padding-top:18px;border-top:1px solid rgba(255,255,255,.14);font-size:12.5px;color:#8FA194;display:flex;flex-wrap:wrap;gap:6px 18px;justify-content:space-between}

/* ---------- 提示 ---------- */
.toast{
  position:fixed;left:50%;bottom:28px;transform:translate(-50%,20px);
  background:var(--ink);color:#F2F0E8;padding:13px 20px;font-size:14px;
  border-left:3px solid var(--timber);opacity:0;pointer-events:none;
  transition:opacity .25s,transform .25s;z-index:99;max-width:min(90vw,420px);
}
.toast.show{opacity:1;transform:translate(-50%,0)}