/* ===== 齐发生物质颗粒厂 · 工业墨绿 + 黄铜金（通栏大图版） ===== */
:root{
  --bg:#f5f6f3; --ink:#1c2420; --ink2:#5a665e;
  --navy:#1d3a2f; --navy2:#274a3b; --line:#dde3dc;
  --amber:#c9a227; --amber2:#a8871d; --green:#2f6b4f;
  --mono:'Consolas',monospace;
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:'Microsoft YaHei','PingFang SC',sans-serif;color:var(--ink);background:var(--bg);line-height:1.75}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.wrap{width:min(1180px,92%);margin:0 auto}

/* 顶条 */
.topbar{background:var(--navy);color:#9fb3a7;font-size:13px}
.topbar-in{display:flex;justify-content:space-between;padding:8px 0}
.topbar a{color:var(--amber)}

/* 导航 */
.nav{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid var(--line)}
.nav-in{display:flex;align-items:stretch;gap:34px;padding:0}
.logo{display:flex;align-items:center;gap:11px;padding:13px 0;border-left:5px solid var(--green);padding-left:14px;margin:10px 0}
.logo b{font-size:19px;line-height:1.2;display:block}
.logo i{font-style:normal;font-family:var(--mono);font-size:10px;letter-spacing:2px;color:var(--ink2);display:block}
.menu{display:flex;gap:30px;margin-left:auto;align-items:center;font-size:15px;font-weight:600}
.menu a{padding:24px 2px;position:relative}
.menu a::after{content:'';position:absolute;left:0;right:100%;bottom:0;height:3px;background:var(--green);transition:.25s}
.menu a:hover::after,.menu a.active::after{right:0}
.menu a.active{color:var(--green)}
.nav-phone{display:flex;align-items:center;background:var(--green);color:#fff;font-weight:800;padding:0 22px;font-size:15px}

/* 首屏：通栏大图 + 左侧悬浮卡 */
.hero{position:relative;min-height:640px;display:block;background:var(--navy)}
.hero-bg{position:absolute;inset:0}
.hero-bg img{width:100%;height:100%;object-fit:cover;object-position:center}
.hero-bg::after{content:'';position:absolute;inset:0;background:linear-gradient(100deg,rgba(13,24,19,.94) 0%,rgba(13,24,19,.68) 50%,rgba(13,24,19,.15) 100%)}
.hero-wrap{position:relative;z-index:2;width:min(1180px,92%);margin:0 auto;padding:120px 0 80px}
.hero-card{max-width:640px;background:rgba(255,255,255,.06);backdrop-filter:blur(8px);border:1px solid rgba(255,255,255,.14);border-left:5px solid var(--amber);padding:46px 48px}
.hero-card .eyebrow{font-family:var(--mono);color:var(--amber);letter-spacing:4px;font-size:12px;margin-bottom:20px}
.hero-card h1{font-size:clamp(32px,4.6vw,56px);line-height:1.16;color:#fff}
.hero-card h1 em{font-style:normal;color:var(--amber)}
.hero-card p{color:#cfe0d4;margin:22px 0 32px;max-width:520px}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-block;padding:14px 30px;font-weight:700;font-size:15px;transition:.2s}
.btn-amber{background:var(--amber);color:#1c1704}
.btn-amber:hover{background:#dbb33a;transform:translateY(-2px)}
.btn-line{border:1px solid rgba(255,255,255,.45);color:#fff}
.btn-line:hover{background:rgba(255,255,255,.1)}
.hero-strip{display:flex;background:var(--navy2);color:#fff;border-top:1px solid rgba(255,255,255,.08)}
.hero-strip div{flex:1;padding:20px 30px;border-right:1px solid rgba(255,255,255,.1);font-size:14px;font-weight:600;color:#b7c9bc}
.hero-strip b{display:block;font-family:var(--mono);font-size:24px;color:var(--amber)}

/* 斜切分隔标题区 */
.sec{padding:90px 0}
.sec-navy{background:var(--navy);color:#e8edf4;clip-path:polygon(0 34px,100% 0,100% 100%,0 100%);padding-top:120px}
.kicker{display:flex;align-items:center;gap:14px;margin-bottom:16px}
.kicker::before{content:'';width:34px;height:3px;background:var(--amber)}
.kicker span{font-family:var(--mono);letter-spacing:3px;font-size:12px;color:var(--amber2)}
.sec .kicker span{color:var(--amber2)}
h2.big{font-size:clamp(24px,3.2vw,36px);margin-bottom:12px}
.lead{color:var(--ink2);max-width:640px}
.sec-navy .lead{color:#a9b7ca}

/* 颗粒：横向编号条目 */
.prow{display:grid;grid-template-columns:110px 280px 1fr;gap:28px;align-items:center;background:#fff;border:1px solid var(--line);margin-bottom:18px;transition:.25s}
.prow:hover{border-color:var(--green);box-shadow:0 12px 30px rgba(29,58,47,.12)}
.prow .no{font-family:var(--mono);font-size:44px;font-weight:700;color:var(--line);text-align:center;transition:.25s}
.prow:hover .no{color:var(--green)}
.prow .ph{height:170px;overflow:hidden}
.prow .ph img{width:100%;height:100%;object-fit:cover;transition:.4s}
.prow:hover .ph img{transform:scale(1.05)}
.prow .tx{padding:18px 28px 18px 0}
.prow .tx h3{font-size:19px;margin-bottom:6px}
.prow .tx p{font-size:14px;color:var(--ink2)}
.prow .tx .spec{font-family:var(--mono);font-size:12.5px;color:var(--amber2);margin-top:8px}

/* 设备：2x2 大图卡 */
.eq-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.eq{position:relative;overflow:hidden;background:#000}
.eq img{width:100%;height:280px;object-fit:cover;opacity:.88;transition:.35s}
.eq:hover img{opacity:1;transform:scale(1.04)}
.eq .cap{position:absolute;left:0;right:0;bottom:0;padding:18px 22px;background:linear-gradient(transparent,rgba(10,16,28,.92));color:#fff}
.eq .cap h3{font-size:18px;border-left:4px solid var(--amber);padding-left:12px;margin-bottom:6px}
.eq .cap p{font-size:13px;color:#c3cedd}

/* 炉具：左图右文交错 + 白底产品图 */
.stove{display:grid;grid-template-columns:460px 1fr;gap:50px;align-items:center;padding:46px 0;border-bottom:1px dashed var(--line)}
.stove:first-of-type{padding-top:0}
.stove.rev{grid-template-columns:1fr 460px}
.stove.rev .simg{order:2}
.simg{background:linear-gradient(150deg,var(--navy),var(--navy2));padding:34px;display:flex;gap:16px;justify-content:center;align-items:flex-end;min-height:360px}
.simg img{max-height:400px;width:auto;max-width:47%;object-fit:contain;filter:drop-shadow(0 12px 20px rgba(0,0,0,.4))}
.stx em{font-family:var(--mono);font-style:normal;font-size:12px;letter-spacing:3px;color:var(--amber2)}
.stx h3{font-size:28px;margin:8px 0 16px}
.stx ul{list-style:none}
.stx li{padding:9px 0 9px 24px;position:relative;color:var(--ink2);font-size:14.5px;border-bottom:1px solid var(--line)}
.stx li::before{content:'▸';position:absolute;left:2px;color:var(--green)}

/* 壁炉三卡 */
.fire-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:36px}
.fcard{background:#fff;border:1px solid var(--line);transition:.25s}
.fcard:hover{transform:translateY(-5px);box-shadow:0 14px 32px rgba(29,58,47,.14)}
.fcard img{height:290px;width:100%;object-fit:contain;padding:20px;background:linear-gradient(150deg,var(--navy),var(--navy2))}
.fcard h4{text-align:center;font-size:17px;margin:14px 0 6px}
.fcard p{text-align:center;font-size:13px;color:var(--ink2);padding:0 20px 20px}

/* 商标 */
.tm-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.tm{background:#fff;padding:14px;border:1px solid var(--line)}
.tm img{height:430px;width:100%;object-fit:cover;object-position:top}
.tm figcaption{display:flex;justify-content:space-between;align-items:baseline;padding:12px 6px 6px}
.tm b{font-size:16px;letter-spacing:2px}
.tm span{font-family:var(--mono);font-size:11.5px;color:var(--ink2)}

/* 优势 */
.why-wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border:1px solid var(--line);background:#fff}
.why{padding:30px 24px;border-right:1px solid var(--line);position:relative}
.why:last-child{border-right:none}
.why .n{font-family:var(--mono);font-size:13px;color:var(--amber2);letter-spacing:2px}
.why h3{font-size:17px;margin:10px 0 8px}
.why p{font-size:13.5px;color:var(--ink2)}
.why::after{content:'';position:absolute;left:24px;bottom:0;width:0;height:3px;background:var(--green);transition:.3s}
.why:hover::after{width:40px}

/* 流程 */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.step{background:#fff;border:1px solid var(--line);padding:26px 22px;border-top:3px solid var(--green)}
.step:hover{border-top-color:var(--amber)}
.step .sn{font-family:var(--mono);font-size:30px;color:var(--line);font-weight:700}
.step h3{font-size:16.5px;margin:8px 0 6px}
.step p{font-size:13.5px;color:var(--ink2)}

/* 联系 */
.contact-sec{background:var(--navy);color:#fff;padding:90px 0}
.contact-flex{display:grid;grid-template-columns:1.3fr 1fr;gap:50px;align-items:center}
.cbox{background:var(--navy2);border:1px solid #3b5a4c;padding:36px;text-align:center}
.cbox .tel{font-family:var(--mono);font-size:clamp(28px,3.4vw,40px);font-weight:700;color:var(--amber);display:block;margin-bottom:10px;letter-spacing:2px}
.cbox p{color:#a9b7ca;font-size:14px;margin-bottom:20px}

/* 内页横幅 */
.phero{background:var(--navy);color:#fff;padding:80px 0 66px;border-bottom:4px solid var(--amber)}
.phero .crumb{font-size:13px;color:#93a3ba;margin-top:14px}
.phero .crumb b{color:var(--amber)}
.phero h1{font-size:clamp(28px,4vw,44px);margin-top:10px}

/* FAQ */
.faq{max-width:860px;margin:0 auto}
.faq details{background:#fff;border:1px solid var(--line);margin-bottom:14px}
.faq summary{padding:18px 22px;font-weight:700;cursor:pointer;list-style:none;display:flex;gap:12px}
.faq summary::-webkit-details-marker{display:none}
.faq summary .q{font-family:var(--mono);color:var(--amber2)}
.faq details[open] summary{color:var(--green)}
.faq .a{padding:0 22px 20px;color:var(--ink2);font-size:14.5px}

/* 页脚 */
.footer{background:#0d1a14;color:#7e8ba0;font-size:13.5px;text-align:center;padding:28px 0}
.footer a:hover{color:var(--amber)}
.footer p{margin:4px 0}

@media(max-width:960px){
  .menu{display:none}
  .hero-wrap{padding:80px 0 60px}
  .hero-card{padding:32px 28px}
  .prow{grid-template-columns:70px 1fr;grid-template-rows:auto auto}
  .prow .tx{grid-column:1/-1;padding:0 22px 20px}
  .eq-grid{grid-template-columns:1fr}
  .stove,.stove.rev{grid-template-columns:1fr;gap:26px}
  .stove.rev .simg{order:0}
  .fire-grid,.tm-grid{grid-template-columns:1fr}
  .why-wrap{grid-template-columns:1fr 1fr}
  .flow{grid-template-columns:1fr 1fr}
  .contact-flex{grid-template-columns:1fr}
  .hero-strip{flex-wrap:wrap}
  .hero-strip div{min-width:50%}
}
@media(max-width:560px){
  .why-wrap,.flow{grid-template-columns:1fr}
  .why{border-right:none;border-bottom:1px solid var(--line)}
}