/* =========================================================================
   远飞纺织 · 官网（新版 · 方案B 靛蓝 + 米白）
   定位：纺织用纸管「贴管图案纸」印刷厂 · 双胶纸 / 牛卡纸印刷
   风格：朴素、踏实、信息型 —— 实色块 + 细边框，弱化高级渐变与金饰
   ========================================================================= */
:root{
  --p:#23406b;          /* 靛蓝主色 */
  --pd:#172c4e;         /* 深靛蓝 */
  --pl:#3a5c8f;         /* 浅靛蓝 */
  --bg:#f3f2ec;         /* 米白底 */
  --card:#ffffff;
  --bd:#dedbd2;
  --line:#e8e5dd;
  --ink:#212a36;
  --dim:#5f6673;
  --mute:#8b9099;
  --top:#172c4e;
  --hl:#a8c8f0;         /* 深色区点缀 */
  --sans:"Microsoft YaHei","PingFang SC","Helvetica Neue",Arial,sans-serif;
  --max:1200px;
  --ease:cubic-bezier(.22,1,.36,1);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--sans);background:var(--bg);color:var(--ink);line-height:1.75;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
ul{list-style:none}
.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 26px}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;font-size:14px;letter-spacing:1px;
  border:1px solid var(--p);background:transparent;color:var(--p);border-radius:3px;cursor:pointer;transition:all .3s var(--ease)}
.btn .arr{transition:transform .3s var(--ease)}
.btn:hover .arr{transform:translateX(4px)}
.btn-solid{background:var(--p);color:#fff!important;border-color:var(--p)!important}
.btn-solid:hover{background:var(--pd)!important;border-color:var(--pd)!important;color:#fff!important}
.btn-ghost{border-color:var(--p);color:var(--p)}
.btn-ghost:hover{background:rgba(35,64,107,.07)}
.btn-light{background:#fff;color:var(--p);border-color:#fff}
.btn-light:hover{background:var(--hl);border-color:var(--hl);color:var(--pd)}

/* ---------- 区块 ---------- */
.section{padding:76px 0}
.section--tint{background:#eceae2}
.section--dark{background:var(--pd)}
.sec-head{text-align:center;margin-bottom:44px}
.sec-eyebrow{display:inline-block;font-size:12.5px;letter-spacing:4px;color:var(--pl);font-weight:700;margin-bottom:12px}
.sec-title{font-size:clamp(24px,3.2vw,34px);font-weight:800;letter-spacing:1px;line-height:1.35;color:var(--ink)}
.sec-title em{font-style:normal;color:var(--p)}
.section--dark .sec-title{color:#fff}
.section--dark .sec-title em{color:var(--hl)}
.section--dark .sec-eyebrow{color:var(--hl)}
.sec-desc{color:var(--dim);max-width:680px;margin:14px auto 0;font-size:14.5px}
.section--dark .sec-desc{color:#b9c1cc}
.sec-more{text-align:center;margin-top:40px}

/* ---------- 顶栏 ---------- */
.topbar{background:var(--top);font-size:12.5px;color:#c3ccd9;padding:8px 0}
.topbar .container{display:flex;align-items:center;justify-content:space-between}
.topbar a{color:#c3ccd9;transition:color .3s}
.topbar a:hover{color:#fff}
.topbar .tb-right{display:flex;gap:22px}

/* ---------- 导航 ---------- */
.header{position:sticky;top:0;z-index:100;background:#fff;border-bottom:3px solid var(--p);transition:box-shadow .3s}
.header.scrolled{box-shadow:0 6px 18px rgba(20,30,50,.12)}
.header .container{display:flex;align-items:center;justify-content:space-between;height:74px}
.logo{display:flex;align-items:center;gap:12px}
.logo-mark{height:52px;width:auto;display:block}
.logo-txt b{display:block;font-size:18px;line-height:1.8;letter-spacing:3px;color:var(--ink)}
.header .logo-txt b{font-size:21px}
.logo-txt em{display:block;font-style:normal;font-size:9px;line-height:1;letter-spacing:1px;color:var(--dim);margin-top:3px}
.nav{display:flex;align-items:center;gap:2px}
.nav a{position:relative;display:block;padding:26px 16px;font-size:14.5px;letter-spacing:1px;color:var(--ink);transition:color .3s}
.nav a::after{content:"";position:absolute;left:16px;right:16px;bottom:18px;height:2px;background:var(--p);transform:scaleX(0);transform-origin:left;transition:transform .3s var(--ease)}
.nav a:hover,.nav a.active{color:var(--p);font-weight:700}
.nav a:hover::after,.nav a.active::after{transform:scaleX(1)}
.nav-cta{margin-left:20px}
.nav-cta .btn{padding:9px 20px}
.nav-toggle{display:none;width:44px;height:44px;flex-direction:column;justify-content:center;gap:6px;background:none;border:none;cursor:pointer}
.nav-toggle span{display:block;height:2px;width:26px;background:var(--ink);transition:all .3s var(--ease)}
.nav-toggle.open span:nth-child(1){transform:translateY(8px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-8px) rotate(-45deg)}

/* ---------- Hero ---------- */
.hero{position:relative;min-height:560px;display:flex;align-items:center;overflow:hidden;background:var(--pd)}
.hero-bg{position:absolute;inset:0}
.hero-bg img{width:100%;height:100%;object-fit:cover}
.hero-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(23,44,78,.92) 0%,rgba(23,44,78,.68) 52%,rgba(23,44,78,.28) 100%)}
.hero-inner{position:relative;z-index:2;max-width:var(--max);margin:0 auto;width:100%;padding:88px 26px}
.hero-tag{display:inline-block;font-size:12.5px;letter-spacing:3px;color:#cfe0f5;border:1px solid rgba(168,200,240,.5);border-radius:3px;padding:5px 14px;margin-bottom:20px}
.hero-title{font-size:clamp(30px,4.8vw,50px);line-height:1.28;font-weight:800;color:#fff;letter-spacing:2px}
.hero-title em{font-style:normal;color:var(--hl)}
.hero-sub{margin:20px 0 30px;font-size:clamp(14px,1.8vw,16.5px);max-width:640px;color:rgba(255,255,255,.88)}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}

/* 数据条（模糊化，不写夸大数据） */
.stats{display:flex;background:var(--p);color:#fff}
.stats .stat{flex:1;text-align:center;padding:20px 10px;border-right:1px solid rgba(255,255,255,.18)}
.stats .stat:last-child{border-right:0}
.stats .stat b{display:block;font-size:22px;font-weight:800;letter-spacing:1px}
.stats .stat span{font-size:12.5px;color:rgba(255,255,255,.82);letter-spacing:1px}

/* ---------- 简介 ---------- */
.about-grid{display:grid;grid-template-columns:1.05fr 1fr;gap:56px;align-items:center}
.about-media{position:relative}
.about-media img{width:100%;height:440px;object-fit:cover;border-radius:4px}
.about-media .am-badge{position:absolute;left:-14px;bottom:-14px;background:var(--p);color:#fff;padding:16px 24px;border-radius:4px;text-align:center;box-shadow:0 10px 24px rgba(20,30,50,.2)}
.about-media .am-badge b{display:block;font-size:30px;font-weight:800;line-height:1}
.about-media .am-badge span{font-size:12px;letter-spacing:1px}
.about-text h2{font-size:clamp(23px,3vw,32px);font-weight:800;line-height:1.4;letter-spacing:1px;margin:8px 0 18px}
.about-text h2 em{font-style:normal;color:var(--p)}
.about-text p{color:var(--dim);margin-bottom:14px;font-size:15px}
.point-list{margin:22px 0 28px;display:grid;gap:12px}
.point-list li{display:flex;align-items:flex-start;gap:12px;font-size:14.5px;color:var(--ink)}
.point-list li span{flex:none;width:24px;height:24px;border-radius:3px;background:rgba(35,64,107,.1);color:var(--p);display:grid;place-items:center;font-size:13px;margin-top:3px;font-weight:700}

/* ---------- 产品分类卡 ---------- */
.cat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:26px}
.cat-card{background:var(--card);border:1px solid var(--bd);border-radius:4px;overflow:hidden;transition:transform .35s var(--ease),box-shadow .35s var(--ease),border-color .35s}
.cat-card:hover{transform:translateY(-5px);box-shadow:0 18px 34px rgba(20,30,50,.12);border-color:var(--p)}
.cat-card .cc-img{height:220px;overflow:hidden}
.cat-card .cc-img img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease)}
.cat-card:hover .cc-img img{transform:scale(1.06)}
.cat-card .cc-body{padding:22px 24px 26px}
.cat-card h3{font-size:20px;font-weight:800;letter-spacing:1px}
.cat-card .cc-en{font-size:11px;letter-spacing:2px;color:var(--pl);font-weight:700}
.cat-card p{color:var(--dim);font-size:14px;margin:10px 0 14px}
.cat-card .cc-link{color:var(--p);font-size:13.5px;font-weight:700;letter-spacing:1px}

/* ---------- 产品卡 ---------- */
.prod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.prod-card{background:var(--card);border:1px solid var(--bd);border-radius:4px;overflow:hidden;display:flex;flex-direction:column;height:100%;transition:transform .35s var(--ease),box-shadow .35s var(--ease),border-color .35s}
.prod-card:hover{transform:translateY(-5px);box-shadow:0 18px 34px rgba(20,30,50,.12);border-color:var(--p)}
.prod-card .pc-img{position:relative;height:230px;overflow:hidden;flex:none}
.prod-card .pc-img img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease)}
.prod-card:hover .pc-img img{transform:scale(1.06)}
.prod-card .pc-tag{position:absolute;top:14px;left:14px;background:var(--p);color:#fff;font-size:12px;letter-spacing:1px;padding:4px 12px;border-radius:3px}
.prod-card .pc-body{padding:20px 22px 24px;display:flex;flex-direction:column;flex:1}
.prod-card h3{font-size:18px;font-weight:800;letter-spacing:1px;margin-bottom:10px}
.prod-card p{color:var(--dim);font-size:13.5px;flex:1;margin-bottom:16px}
.prod-card .pc-link{color:var(--p);font-size:13px;font-weight:700;letter-spacing:1px;display:inline-flex;gap:6px;align-items:center}

/* ---------- 优势卡 ---------- */
.adv-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.adv-card{background:var(--card);border:1px solid var(--bd);border-radius:4px;padding:28px 26px;transition:all .35s var(--ease);height:100%}
.adv-card:hover{border-color:var(--p);transform:translateY(-4px);box-shadow:0 16px 30px rgba(20,30,50,.1)}
.adv-card .adv-ico{width:46px;height:46px;border-radius:4px;background:rgba(35,64,107,.1);color:var(--p);display:grid;place-items:center;margin-bottom:16px}
.adv-card h3{font-size:17px;font-weight:800;letter-spacing:1px;margin-bottom:8px}
.adv-card p{color:var(--dim);font-size:13.5px}

/* ---------- 流程 ---------- */
.flow{display:grid;grid-template-columns:repeat(5,1fr);gap:0;border:1px solid var(--bd);border-radius:4px;overflow:hidden;background:var(--card)}
.flow-step{padding:26px 18px;text-align:center;border-right:1px solid var(--line);position:relative}
.flow-step:last-child{border-right:0}
.flow-step .fs-no{width:36px;height:36px;margin:0 auto 12px;border-radius:50%;background:var(--p);color:#fff;display:grid;place-items:center;font-weight:800;font-size:15px}
.flow-step h4{font-size:15px;font-weight:800;margin-bottom:6px}
.flow-step p{font-size:12.5px;color:var(--dim)}

/* ---------- 内页 Hero ---------- */
.page-hero{position:relative;padding:76px 0 60px;background:var(--pd);text-align:center;overflow:hidden}
.page-hero .ph-bg{position:absolute;inset:0}
.page-hero .ph-bg img{width:100%;height:100%;object-fit:cover}
.page-hero .ph-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(160deg,rgba(23,44,78,.9),rgba(23,44,78,.82))}
.page-hero .container{position:relative;z-index:2}
.page-hero h1{font-size:clamp(26px,4vw,40px);font-weight:800;color:#fff;letter-spacing:4px;margin-bottom:10px}
.page-hero .crumb{font-size:13px;letter-spacing:1px;color:#c3ccd9}
.page-hero .crumb a{color:var(--hl)}
.page-hero .crumb a:hover{color:#fff}

/* ---------- 产品中心 Tab ---------- */
.pnav{display:flex;justify-content:center;flex-wrap:wrap;gap:12px;margin-bottom:36px}
.pnav button{border:1px solid var(--bd);background:var(--card);color:var(--dim);padding:11px 28px;font-size:14px;letter-spacing:1px;cursor:pointer;border-radius:3px;transition:all .3s var(--ease);font-family:var(--sans)}
.pnav button:hover{border-color:var(--pl);color:var(--p)}
.pnav button.active{background:var(--p);border-color:var(--p);color:#fff}
.tab-panel{display:none}
.tab-panel.active{display:grid;grid-template-columns:repeat(2,1fr);gap:26px}

/* ---------- 详情页 ---------- */
.detail-layout{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.detail-media{border:1px solid var(--bd);border-radius:4px;overflow:hidden;position:sticky;top:100px}
.detail-media img{width:100%;height:460px;object-fit:cover}
.detail-info .d-cat{display:inline-block;background:rgba(35,64,107,.1);color:var(--p);font-size:12.5px;letter-spacing:1px;padding:5px 13px;border-radius:3px;margin-bottom:16px;font-weight:700}
.detail-info h1{font-size:clamp(22px,2.8vw,30px);font-weight:800;line-height:1.4;letter-spacing:1px;margin-bottom:16px}
.detail-info .d-summary{color:var(--dim);font-size:14.5px;border-left:3px solid var(--p);padding-left:16px;margin-bottom:24px}
.spec-tbl{width:100%;border-collapse:collapse;margin-bottom:24px}
.spec-tbl td{border:1px solid var(--bd);padding:12px 16px;font-size:13.5px}
.spec-tbl td:first-child{background:#eeeee7;color:var(--dim);width:32%;font-weight:700}
.detail-tags{display:flex;flex-wrap:wrap;gap:9px;margin-bottom:28px}
.detail-tags span{border:1px solid var(--bd);background:var(--card);color:var(--dim);font-size:12.5px;padding:5px 13px;border-radius:3px}
.back-link{display:inline-flex;align-items:center;gap:6px;color:var(--p);font-size:13.5px;font-weight:700;letter-spacing:1px}
.back-link:hover{gap:10px}

/* ---------- 工艺 / 参数表 ---------- */
.craft-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.craft-media img{width:100%;height:400px;object-fit:cover;border-radius:4px}
.craft-list{display:grid;gap:16px;margin-top:6px}
.craft-list li{display:flex;gap:14px;align-items:flex-start}
.craft-list .cl-ico{flex:none;width:42px;height:42px;border-radius:4px;background:rgba(35,64,107,.1);color:var(--p);display:grid;place-items:center}
.craft-list h4{font-size:16px;font-weight:800;margin-bottom:3px}
.craft-list p{font-size:13.5px;color:var(--dim)}
.wide-tbl{width:100%;border-collapse:collapse;background:var(--card)}
.wide-tbl th,.wide-tbl td{border:1px solid var(--bd);padding:13px 16px;font-size:13.5px;text-align:left}
.wide-tbl th{background:#eeeee7;color:var(--ink);font-weight:800}
.wide-tbl td{color:var(--dim)}

/* ---------- FAQ ---------- */
.faq{max-width:860px;margin:0 auto;display:grid;gap:12px}
.faq-item{background:var(--card);border:1px solid var(--bd);border-radius:4px;overflow:hidden}
.faq-item summary{cursor:pointer;padding:16px 20px;font-weight:800;font-size:15px;list-style:none;display:flex;justify-content:space-between;gap:12px}
.faq-item summary::after{content:"+";color:var(--p);font-weight:800}
.faq-item[open] summary::after{content:"−"}
.faq-item p{padding:0 20px 18px;color:var(--dim);font-size:14px}

/* ---------- 联系 ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.contact-media img{width:100%;height:100%;max-height:520px;object-fit:cover;border-radius:4px}
.contact-info h2{font-size:26px;font-weight:800;letter-spacing:2px;margin:6px 0 8px}
.contact-info > p{color:var(--dim);font-size:14px;margin-bottom:28px}
.c-item{display:grid;grid-template-columns:50px 1fr;gap:18px;padding:20px 0;border-bottom:1px solid var(--line);align-items:center}
.c-ico{width:50px;height:50px;border-radius:4px;background:rgba(35,64,107,.1);color:var(--p);display:grid;place-items:center}
.c-item h4{color:var(--dim);font-size:12.5px;letter-spacing:1px;margin-bottom:3px}
.c-item p,.c-item a{color:var(--ink);font-size:14.5px}
.c-item a:hover{color:var(--p)}
.c-item .c-tel{font-size:24px;color:var(--p);font-weight:800}
.map-box{margin-top:64px;border:1px solid var(--bd);border-radius:4px;height:360px;overflow:hidden}
.map-box iframe{width:100%;height:100%;border:0}

/* ---------- CTA ---------- */
.cta{background:var(--pd);padding:64px 0;text-align:center;border-radius:4px;position:relative;overflow:hidden}
.cta h2{font-size:clamp(22px,3.4vw,32px);font-weight:800;color:#fff;letter-spacing:2px;margin-bottom:12px}
.cta p{color:rgba(255,255,255,.85);margin-bottom:28px;font-size:14.5px}
.cta .hero-actions{justify-content:center}

/* ---------- 页脚 ---------- */
.footer{background:var(--pd);border-top:4px solid var(--p);margin-top:0}
.footer-main{padding:60px 0 40px;display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px}
.footer .logo-txt b{color:#fff}
.footer .logo-mark{height:46px;filter:brightness(1.55) saturate(1.15)}
.footer .logo-txt em{color:#9fb0c8}
.footer .logo-txt{width:170px}
.footer .logo-txt b{white-space:nowrap}
.footer .logo-txt em{text-align:justify;text-align-last:justify;width:100%;white-space:nowrap;font-size:8.5px}
.footer h4{color:#fff;font-size:16px;font-weight:800;letter-spacing:1px;margin-bottom:18px;padding-bottom:10px;border-bottom:1px solid rgba(255,255,255,.14);display:inline-block}
.footer .f-brand p{color:#a9b4c4;font-size:13.5px;margin-top:16px;max-width:310px}
.footer ul li{margin-bottom:11px}
.footer ul a{color:#a9b4c4;font-size:13.5px;transition:color .3s}
.footer ul a:hover{color:#fff}
.footer .f-contact li{color:#a9b4c4;font-size:13.5px}
.footer .f-contact b{color:#fff;display:block;font-size:13px;font-weight:700;margin-bottom:2px}
.footer .f-contact .tel{font-size:20px;color:var(--hl);font-weight:800}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:18px 0;font-size:12.5px;color:#8f9db1}
.footer-bottom .container{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}

/* ---------- 动画 ---------- */
.reveal{opacity:0;transform:translateY(28px);transition:all .7s var(--ease)}
.reveal.in{opacity:1;transform:none}
.reveal.d1{transition-delay:.1s}
.reveal.d2{transition-delay:.2s}
.reveal.d3{transition-delay:.3s}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .about-grid,.contact-grid,.detail-layout,.craft-grid{grid-template-columns:1fr;gap:40px}
  .adv-grid,.prod-grid,.tab-panel.active{grid-template-columns:repeat(2,1fr)}
  .flow{grid-template-columns:repeat(3,1fr)}
  .flow-step{border-bottom:1px solid var(--line)}
  .footer-main{grid-template-columns:repeat(2,1fr)}
  .detail-media{position:static}
}
@media (max-width:820px){
  .section{padding:56px 0}
  .nav-toggle{display:flex}
  .nav{position:fixed;left:0;right:0;top:74px;background:#fff;flex-direction:column;align-items:stretch;border-bottom:3px solid var(--p);max-height:0;overflow:hidden;transition:max-height .35s var(--ease);z-index:99}
  .nav.open{max-height:420px}
  .nav a{padding:15px 26px;border-bottom:1px solid var(--line)}
  .nav a::after{display:none}
  .nav-cta{margin:14px 26px 20px}
}
@media (max-width:640px){
  .cat-grid,.prod-grid,.adv-grid,.tab-panel.active,.flow,.footer-main{grid-template-columns:1fr}
  .flow-step{border-right:0}
  .stats{flex-wrap:wrap}
  .stats .stat{flex:1 1 50%;border-bottom:1px solid rgba(255,255,255,.18)}
  .topbar .tb-left{display:none}
  .hero-inner{padding:64px 22px}
}