/* =========================================================
   博瑞双杰 · 结构加固材料  企业官网样式
   Design: 工程蓝 + 工业橙，硬朗网格 / 技术标尺风格
   ========================================================= */

:root{
  --navy:#0A2540;
  --navy-2:#0E3355;
  --blue:#1668A8;
  --blue-d:#12507F;
  --accent:#DE6C1E;
  --accent-l:#F08A3C;
  --ink:#111A22;
  --body:#43535F;
  --muted:#7C8B97;
  --line:#E1E7EC;
  --line-d:#CFD8DF;
  --bg:#F5F7F9;
  --bg-2:#EDF1F5;
  --white:#fff;
  --radius:2px;
  --wrap:1220px;
  --shadow:0 18px 40px -24px rgba(10,37,64,.35);
  --ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",sans-serif;
  color:var(--body);
  background:var(--white);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;line-height:1.25;letter-spacing:.01em}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
::selection{background:var(--blue);color:#fff}

.wrap{max-width:var(--wrap);margin:0 auto;padding:0 28px}
.wrap-narrow{max-width:960px;margin:0 auto;padding:0 28px}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:fixed;inset:0 0 auto 0;z-index:100;
  background:rgba(255,255,255,.94);
  backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .3s var(--ease),background .3s var(--ease);
}
.site-header.is-scrolled{box-shadow:0 10px 30px -18px rgba(10,37,64,.45)}
.header-inner{
  max-width:var(--wrap);margin:0 auto;padding:0 28px;
  height:78px;display:flex;align-items:center;gap:36px;
}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
.brand-mark{display:flex;align-items:center;flex:0 0 auto}
.brand-mark img{height:40px;width:auto;max-width:100%}
.brand-text{width:112px;flex:0 0 112px}
.brand-text strong.brand-cn{
  display:flex;justify-content:space-between;font-size:19px;color:var(--ink);line-height:1.2;letter-spacing:0;
}
.brand-cn i{font-style:normal}
.brand-text .brand-en{
  display:flex;justify-content:space-between;align-items:baseline;
  font-size:9.5px;letter-spacing:.115em;color:var(--muted);margin-top:4px;
}
.brand-en i{font-style:normal}
.nav{margin-left:auto;display:flex;align-items:center;gap:6px}
.nav a{
  position:relative;padding:8px 14px;font-size:15px;color:#26333D;font-weight:500;
  transition:color .2s;
}
.nav a::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;
  background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform .3s var(--ease);
}
.nav a:hover{color:var(--blue-d)}
.nav a:hover::after,.nav a.active::after{transform:scaleX(1)}
.nav a.active{color:var(--blue-d);font-weight:600}
.header-tel{
  display:inline-flex;align-items:center;gap:9px;
  background:var(--navy);color:#fff;padding:11px 18px;font-size:14px;letter-spacing:.02em;
  transition:background .25s;
}
.header-tel:hover{background:var(--blue-d)}
.header-tel svg{width:15px;height:15px;fill:none;stroke:currentColor;stroke-width:1.8}
.nav-toggle{
  display:none;margin-left:auto;width:44px;height:44px;border:1px solid var(--line);
  background:transparent;align-items:center;justify-content:center;cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:1.5px;background:var(--ink);position:relative}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:1.5px;background:var(--ink);transition:.25s;
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

/* ---------- 通用区块 ---------- */
.section{padding:104px 0}
.section--tight{padding:72px 0}
.section--bg{background:var(--bg)}
.section--grid{
  background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:64px 64px;background-position:center;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:11.5px;letter-spacing:.28em;text-transform:uppercase;color:var(--blue);
  font-weight:600;margin-bottom:16px;
}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--accent)}
.section-head{max-width:760px;margin-bottom:52px}
.section-head h2{font-size:clamp(26px,3.2vw,40px);letter-spacing:.01em}
.section-head p{margin-top:16px;color:var(--body);font-size:15.5px}
.section-head--center{margin-left:auto;margin-right:auto;text-align:center}
.section-head--center .eyebrow{justify-content:center}
.section-head--center .eyebrow::after{content:"";width:26px;height:2px;background:var(--accent)}

/* ---------- 首页 Hero ---------- */
.hero{position:relative;padding-top:78px;overflow:hidden;background:var(--navy)}
.hero-bg{
  position:absolute;inset:0;
  background:url("../img/hero-building.jpg") center 30%/cover no-repeat;
}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(96deg,rgba(7,26,44,.95) 0%,rgba(8,30,50,.86) 42%,rgba(9,34,56,.42) 100%);
}
.hero-grid{
  position:absolute;inset:0;z-index:1;opacity:.16;
  background-image:linear-gradient(rgba(255,255,255,.4) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.4) 1px,transparent 1px);
  background-size:120px 120px;
  mask-image:linear-gradient(90deg,#000,transparent 75%);
}
.hero-inner{position:relative;z-index:2;padding-top:116px;padding-bottom:132px;color:#fff}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:12px;font-size:11.5px;letter-spacing:.3em;
  text-transform:uppercase;color:#9DC3E0;margin-bottom:26px;
}
.hero-eyebrow::before{content:"";width:34px;height:1px;background:var(--accent-l)}
.hero h1{
  color:#fff;font-size:clamp(34px,5.2vw,62px);line-height:1.16;letter-spacing:.01em;font-weight:700;
}
.hero h1 em{
  font-style:normal;color:#fff;white-space:nowrap;
  background:linear-gradient(transparent 84%,rgba(222,108,30,.85) 84%,rgba(222,108,30,.85) 96%,transparent 96%);
  padding:0 2px;
}
.hero p.lede{
  margin-top:26px;max-width:620px;font-size:16.5px;line-height:1.9;color:rgba(255,255,255,.82);
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:38px}
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:15px 30px;font-size:15px;font-weight:600;letter-spacing:.04em;
  border:1px solid transparent;transition:.28s var(--ease);
}
.btn svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:1.9;transition:transform .28s var(--ease)}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:#C75C13;transform:translateY(-2px)}
.btn-primary:hover svg{transform:translateX(4px)}
.btn-ghost{border-color:rgba(255,255,255,.4);color:#fff}
.btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.1)}
.btn-dark{background:var(--navy);color:#fff}
.btn-dark:hover{background:var(--blue-d);transform:translateY(-2px)}
.btn-line{border-color:var(--line-d);color:var(--ink)}
.btn-line:hover{border-color:var(--navy);background:var(--navy);color:#fff}

/* 标语条（四句品牌标语，2×2） */
.stats{position:relative;z-index:3;margin-top:-64px}
.stats-inner{
  background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);
  display:grid;grid-template-columns:repeat(2,1fr);
}
.slogan{padding:34px 38px 38px;position:relative}
.slogan:nth-child(odd){border-right:1px solid var(--line)}
.slogan:nth-child(-n+2){border-bottom:1px solid var(--line)}
.slogan-idx{display:block;font-size:11px;letter-spacing:.26em;color:var(--blue);font-weight:700}
.slogan p{margin-top:12px;font-size:18px;line-height:1.7;color:#31465A;letter-spacing:.02em;font-weight:600}
.slogan p b{
  font-size:23px;color:var(--accent);font-weight:700;letter-spacing:0;
  white-space:nowrap;line-height:1.35;margin:0 4px;
}
.slogan::before{
  content:"";position:absolute;left:38px;top:0;width:26px;height:3px;background:var(--accent);
}

/* ---------- 关于 ---------- */
.about-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:72px;align-items:center}
.about-copy p + p{margin-top:16px}
.about-copy p{font-size:15.5px;line-height:1.95;color:var(--body)}
.about-lead{
  font-size:17px !important;color:var(--ink) !important;font-weight:500;line-height:1.9 !important;
  padding-left:20px;border-left:2px solid var(--accent);margin-bottom:24px !important;
}
.about-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}
.tag{
  font-size:13px;color:var(--blue-d);background:#EAF2F8;border:1px solid #D6E5F0;
  padding:7px 14px;letter-spacing:.02em;
}
.about-visual{position:relative}
.about-visual img{width:100%;height:520px;object-fit:cover;filter:saturate(.92)}
.about-badge{
  position:absolute;left:-24px;bottom:-24px;background:var(--navy);color:#fff;
  padding:26px 30px;max-width:290px;box-shadow:var(--shadow);
}
.about-badge strong{display:block;font-size:14px;letter-spacing:.18em;color:#8FB6D3;margin-bottom:12px}
.about-badge p{font-size:15px;line-height:1.8;color:rgba(255,255,255,.9)}
.about-visual::before{
  content:"";position:absolute;right:-18px;top:-18px;width:120px;height:120px;
  border-top:2px solid var(--accent);border-right:2px solid var(--accent);
}

/* ---------- 产品卡 ---------- */
.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.p-card{
  background:#fff;border:1px solid var(--line);display:flex;flex-direction:column;
  transition:.35s var(--ease);position:relative;overflow:hidden;
}
.p-card::before{
  content:"";position:absolute;left:0;top:0;width:100%;height:3px;
  background:var(--pc,#1668A8);transform:scaleX(0);transform-origin:left;
  transition:transform .4s var(--ease);z-index:3;
}
.p-card:hover{transform:translateY(-6px);box-shadow:0 26px 50px -32px rgba(10,37,64,.55);border-color:var(--line-d)}
.p-card:hover::before{transform:scaleX(1)}
.p-thumb{aspect-ratio:4/3;overflow:hidden;background:#EEF2F5;position:relative}
.p-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease)}
.p-card:hover .p-thumb img{transform:scale(1.045)}
.p-index{
  position:absolute;left:14px;top:14px;z-index:2;
  background:rgba(255,255,255,.92);color:var(--pc,#1668A8);
  font-family:"DIN Alternate","Bahnschrift",Arial,sans-serif;
  font-size:12.5px;font-weight:700;letter-spacing:.08em;padding:4px 9px;
}
.p-body{padding:22px 24px 26px;display:flex;flex-direction:column;flex:1}
.p-body h3{font-size:19px;letter-spacing:.02em}
.p-body .p-en{
  font-size:10.5px;letter-spacing:.22em;text-transform:uppercase;color:var(--muted);margin-top:7px;
}
.p-body p{margin-top:14px;font-size:14px;line-height:1.8;color:var(--body);flex:1}
.p-link{
  margin-top:20px;display:inline-flex;align-items:center;gap:8px;
  font-size:13px;color:var(--pc,#1668A8);font-weight:600;letter-spacing:.04em;
}
.p-link svg{width:14px;height:14px;stroke:currentColor;fill:none;stroke-width:2;transition:transform .3s var(--ease)}
.p-card:hover .p-link svg{transform:translateX(4px)}

/* ---------- 应用领域 ---------- */
.sectors{display:grid;grid-template-columns:repeat(5,1fr);gap:0;border:1px solid var(--line);background:#fff}
.sector{
  padding:38px 26px 42px;border-right:1px solid var(--line);position:relative;
  transition:background .3s var(--ease);
}
.sector:last-child{border-right:0}
.sector:hover{background:#FBFCFD}
.sector:hover .sector-icon{color:var(--accent);border-color:var(--accent)}
.sector-icon{
  width:52px;height:52px;border:1px solid var(--line-d);display:grid;place-items:center;
  color:var(--navy);transition:.3s var(--ease);margin-bottom:22px;
}
.sector-icon svg{width:25px;height:25px;stroke:currentColor;fill:none;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.sector h3{font-size:16.5px;letter-spacing:.02em}
.sector p{margin-top:10px;font-size:13.5px;line-height:1.8;color:var(--muted)}
.sector .num{
  position:absolute;right:18px;top:20px;font-family:"DIN Alternate","Bahnschrift",Arial,sans-serif;
  font-size:12px;color:#C6D2DB;letter-spacing:.05em;
}

/* ---------- 质量 / 深色区 ---------- */
.dark-section{
  position:relative;background:var(--navy);color:#fff;overflow:hidden;
}
.dark-section .bg{
  position:absolute;inset:0;background:url("../img/facade.jpg") center/cover no-repeat;opacity:.16;
}
.dark-section .bg::after{
  content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(10,37,64,.9),rgba(10,37,64,.97));
}
.dark-section .inner{position:relative;z-index:2}
.dark-section h2,.dark-section h3{color:#fff}
.dark-section .eyebrow{color:#9DC3E0}
.dark-section .section-head p{color:rgba(255,255,255,.72)}
.quality-grid{display:grid;grid-template-columns:1fr 1.15fr;gap:64px;align-items:start}
.std-list{border-top:1px solid rgba(255,255,255,.16)}
.std{
  display:flex;gap:20px;padding:22px 0;border-bottom:1px solid rgba(255,255,255,.16);
  align-items:flex-start;transition:background .25s;
}
.std-code{
  font-family:"DIN Alternate","Bahnschrift",Arial,sans-serif;font-size:14px;letter-spacing:.02em;
  color:var(--accent-l);flex:0 0 148px;font-weight:600;padding-top:1px;
}
.std div{font-size:14px;line-height:1.75;color:rgba(255,255,255,.8)}
.std div b{display:block;color:#fff;font-weight:600;font-size:14.5px;margin-bottom:4px}
.report-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.report-grid--4{grid-template-columns:repeat(4,1fr)}
.report{
  position:relative;display:block;background:#fff;padding:8px;cursor:zoom-in;
  border:1px solid rgba(255,255,255,.14);transition:.3s var(--ease);
}
.report:hover{transform:translateY(-4px);border-color:rgba(255,255,255,.5)}
.report img{width:100%;aspect-ratio:3/4.1;object-fit:cover;object-position:top}
.report span{
  display:block;padding:9px 4px 4px;font-size:12px;color:var(--ink);text-align:center;letter-spacing:.02em;
}
.report::after{
  content:"查看";position:absolute;right:8px;top:8px;background:rgba(10,37,64,.86);color:#fff;
  font-size:11px;padding:3px 8px;opacity:0;transition:opacity .3s;
}
.report:hover::after{opacity:1}

/* ---------- 工艺时间轴 ---------- */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.flow-step{background:#fff;padding:26px 24px 30px;position:relative}
.flow-step b{
  display:block;font-family:"DIN Alternate","Bahnschrift",Arial,sans-serif;font-size:13px;
  color:var(--accent);letter-spacing:.08em;margin-bottom:12px;
}
.flow-step h4{font-size:15.5px;margin-bottom:8px}
.flow-step p{font-size:13px;line-height:1.75;color:var(--muted)}

/* ---------- CTA ---------- */
.cta{
  background:linear-gradient(105deg,var(--blue-d),var(--navy) 68%);color:#fff;position:relative;overflow:hidden;
}
.cta::before{
  content:"";position:absolute;right:-80px;top:-80px;width:360px;height:360px;
  border:1px solid rgba(255,255,255,.16);transform:rotate(45deg);
}
.cta::after{
  content:"";position:absolute;right:40px;bottom:-120px;width:300px;height:300px;
  border:1px solid rgba(255,255,255,.1);transform:rotate(45deg);
}
.cta-inner{position:relative;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap}
.cta h2{color:#fff;font-size:clamp(24px,3vw,34px)}
.cta p{margin-top:12px;color:rgba(255,255,255,.75);font-size:15px;max-width:560px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ---------- 页脚 ---------- */
.site-footer{background:#071B2E;color:rgba(255,255,255,.62);padding:64px 0 0;font-size:14px}
.footer-grid{display:grid;grid-template-columns:1.6fr .8fr .8fr 1.1fr;gap:48px;padding-bottom:48px}
.footer-brand .brand-text strong{color:#fff}
.footer-brand .brand-text span{color:rgba(255,255,255,.4)}
.footer-brand p{margin-top:20px;line-height:1.9;color:rgba(255,255,255,.55);max-width:330px;font-size:13.5px}
.site-footer h4{color:#fff;font-size:14px;letter-spacing:.1em;margin-bottom:20px;font-weight:600}
.site-footer li + li{margin-top:11px}
.site-footer li a{transition:color .2s;font-size:13.5px}
.site-footer li a:hover{color:var(--accent-l)}
.footer-contact li{display:flex;gap:10px;line-height:1.7;font-size:13.5px}
.footer-contact svg{width:15px;height:15px;flex:0 0 15px;margin-top:5px;stroke:var(--accent-l);fill:none;stroke-width:1.7}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);padding:22px 0;display:flex;
  justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:12.5px;color:rgba(255,255,255,.38);
}

/* ---------- 内页 Hero ---------- */
.page-hero{
  position:relative;padding:158px 0 76px;background:var(--navy);color:#fff;overflow:hidden;
}
.page-hero .bg{position:absolute;inset:0;background:url("../img/hero-building.jpg") center 40%/cover;opacity:.28}
.page-hero .bg::after{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(10,37,64,.95),rgba(10,37,64,.72))}
.page-hero .inner{position:relative;z-index:2}
.page-hero h1{color:#fff;font-size:clamp(30px,4vw,46px);letter-spacing:.03em}
.page-hero p{margin-top:18px;max-width:640px;color:rgba(255,255,255,.75);font-size:15.5px;line-height:1.9}
.crumb{font-size:12.5px;color:rgba(255,255,255,.5);letter-spacing:.06em;margin-bottom:22px}
.crumb a:hover{color:#fff}
.crumb span{margin:0 8px;opacity:.5}

/* ---------- 产品中心 ---------- */
.filter-bar{
  position:sticky;top:78px;z-index:60;background:rgba(255,255,255,.96);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--line);
}
.filter-inner{display:flex;gap:8px;padding:16px 0;overflow-x:auto;scrollbar-width:none}
.filter-inner::-webkit-scrollbar{display:none}
.filter-btn{
  border:1px solid var(--line);background:#fff;color:var(--body);padding:9px 20px;
  font-size:13.5px;cursor:pointer;white-space:nowrap;font-family:inherit;letter-spacing:.02em;
  transition:.25s var(--ease);
}
.filter-btn:hover{border-color:var(--line-d);color:var(--ink)}
.filter-btn.is-on{background:var(--navy);border-color:var(--navy);color:#fff}

.wrap.products-page{padding-top:78px;padding-bottom:96px}
.prod{margin-bottom:88px;scroll-margin-top:150px}
.prod:last-child{margin-bottom:0}
.prod-head{display:flex;align-items:flex-end;gap:18px;padding-bottom:20px;border-bottom:1px solid var(--line);margin-bottom:36px}
.prod-no{
  font-family:"DIN Alternate","Bahnschrift",Arial,sans-serif;font-size:44px;line-height:.9;
  color:var(--pc,#1668A8);font-weight:700;letter-spacing:-.02em;
}
.prod-title h3{font-size:clamp(22px,2.4vw,30px);letter-spacing:.02em}
.prod-title span{display:block;font-size:11px;letter-spacing:.26em;text-transform:uppercase;color:var(--muted);margin-top:8px}
.prod-grid{display:grid;grid-template-columns:440px 1fr;gap:52px;align-items:start}
.prod-media{position:sticky;top:150px}
.prod-media .frame{background:var(--bg);border:1px solid var(--line);padding:0;overflow:hidden}
.prod-media img{width:100%;aspect-ratio:1/1;object-fit:cover}
/* 白底棚拍图：按完整显示处理，任何画框比例下都不裁切产品 */
.prod-media img.is-fit,.p-thumb img.is-fit{object-fit:contain;background:#fff}
.prod-media .meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.prod-media .meta span{font-size:12px;color:var(--blue-d);background:#EAF2F8;padding:5px 11px;border:1px solid #D6E5F0}
.prod-intro{font-size:15px;line-height:1.95;color:var(--body)}
.prod-block{margin-top:32px}
.prod-block h4{
  font-size:14px;letter-spacing:.14em;color:var(--ink);display:flex;align-items:center;gap:10px;margin-bottom:16px;
}
.prod-block h4::before{content:"";width:4px;height:14px;background:var(--pc,#1668A8)}
.feat-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px 26px}
.feat{display:flex;gap:10px;font-size:14px;line-height:1.7;color:var(--body)}
.feat::before{
  content:"";flex:0 0 5px;height:5px;margin-top:9px;background:var(--pc,#1668A8);transform:rotate(45deg);
}
.scope{background:var(--bg);border-left:2px solid var(--pc,#1668A8);padding:18px 22px;font-size:14px;line-height:1.9}
details.spec{margin-top:32px;border:1px solid var(--line)}
details.spec summary{
  cursor:pointer;padding:16px 20px;font-size:14px;font-weight:600;color:var(--ink);
  display:flex;align-items:center;justify-content:space-between;list-style:none;background:#FAFBFC;
}
details.spec summary::-webkit-details-marker{display:none}
details.spec summary::after{content:"+";font-size:18px;color:var(--pc,#1668A8);font-weight:400}
details.spec[open] summary::after{content:"–"}
.table-scroll{overflow-x:auto}
table.spec{width:100%;border-collapse:collapse;font-size:13px;min-width:560px}
table.spec th,table.spec td{border:1px solid var(--line);padding:10px 14px;text-align:left}
table.spec thead th{background:var(--navy);color:#fff;font-weight:500;font-size:12.5px;letter-spacing:.04em}
table.spec tbody tr:nth-child(even){background:#FAFBFC}
table.spec td.num{font-family:"DIN Alternate","Bahnschrift",Arial,sans-serif;color:var(--ink)}
table.spec .cat{
  background:#EDF2F7;color:var(--blue-d);font-size:12px;white-space:nowrap;text-align:center;width:76px;
}

/* ---------- 关于页 ---------- */
.value-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.value{background:#fff;border:1px solid var(--line);padding:36px 32px;position:relative}
.value .idx{
  font-family:"DIN Alternate","Bahnschrift",Arial,sans-serif;color:#DCE5EC;font-size:42px;font-weight:700;
  line-height:1;margin-bottom:18px;letter-spacing:-.02em;
}
.value .idx.idx-code{font-family:inherit;font-size:15px;letter-spacing:.12em;color:#9FB6C6;font-weight:600;margin-bottom:14px}
.value h3{font-size:19px;margin-bottom:12px}
.value p{font-size:14px;line-height:1.85;color:var(--body)}
.value:hover{border-color:var(--line-d);box-shadow:var(--shadow)}
.quote-band{
  background:var(--navy);color:#fff;padding:64px 0;position:relative;overflow:hidden;
}
.quote-band::before{
  content:"“";position:absolute;left:6%;top:-30px;font-size:240px;color:rgba(255,255,255,.06);
  font-family:Georgia,serif;line-height:1;
}
.quote-band blockquote{
  margin:0;max-width:880px;font-size:clamp(18px,2.2vw,24px);line-height:1.8;color:#fff;font-weight:500;
  position:relative;z-index:2;
}
.quote-band cite{display:block;margin-top:22px;font-style:normal;font-size:13px;letter-spacing:.16em;color:#8FB6D3}

/* ---------- 联系页 ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:start}
.info-card{display:flex;gap:18px;padding:24px 0;border-bottom:1px solid var(--line)}
.info-card:first-child{border-top:1px solid var(--line)}
.info-icon{
  width:44px;height:44px;flex:0 0 44px;border:1px solid var(--line-d);display:grid;place-items:center;color:var(--blue-d);
}
.info-icon svg{width:19px;height:19px;stroke:currentColor;fill:none;stroke-width:1.7}
.info-card b{display:block;font-size:12px;letter-spacing:.16em;color:var(--muted);margin-bottom:6px;font-weight:500}
.info-card p{font-size:16px;color:var(--ink);line-height:1.7}
.info-card p.big{font-size:26px;font-weight:700;letter-spacing:.01em;font-family:"DIN Alternate","Bahnschrift",Arial,sans-serif}
.form-card{background:var(--bg);border:1px solid var(--line);padding:38px}
.form-card h3{font-size:20px;margin-bottom:8px}
.form-card .hint{font-size:13px;color:var(--muted);margin-bottom:26px}
.field{margin-bottom:16px}
.field label{display:block;font-size:12.5px;color:var(--body);margin-bottom:7px;letter-spacing:.04em}
.field input,.field select,.field textarea{
  width:100%;border:1px solid var(--line-d);background:#fff;padding:11px 14px;font-size:14px;
  font-family:inherit;color:var(--ink);outline:none;transition:border-color .2s,box-shadow .2s;
}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(22,104,168,.1)}
.field textarea{resize:vertical;min-height:96px}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.form-note{font-size:12px;color:var(--muted);margin-top:14px;line-height:1.7}
.map-card{
  margin-top:48px;border:1px solid var(--line);background:var(--bg);padding:40px;display:flex;gap:32px;
  align-items:center;justify-content:space-between;flex-wrap:wrap;
}
.map-card h3{font-size:18px}
.map-card p{font-size:14px;color:var(--body);margin-top:8px;line-height:1.85}

/* ---------- 灯箱 ---------- */
.lightbox{
  position:fixed;inset:0;z-index:200;background:rgba(6,20,34,.94);display:none;
  align-items:center;justify-content:center;padding:40px;
}
.lightbox.is-open{display:flex}
.lightbox img{max-width:min(94vw,1320px);max-height:90vh;object-fit:contain;background:#fff}
.lightbox-close{
  position:absolute;right:28px;top:22px;width:44px;height:44px;border:1px solid rgba(255,255,255,.3);
  background:transparent;color:#fff;font-size:22px;cursor:pointer;line-height:1;
}
.lightbox-close:hover{background:rgba(255,255,255,.12)}

/* ---------- 滚动动效 ---------- */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.reveal.is-in{opacity:1;transform:none}

/* ---------- 返回顶部 ---------- */
.to-top{
  position:fixed;right:26px;bottom:26px;width:46px;height:46px;background:var(--navy);color:#fff;
  border:0;cursor:pointer;display:grid;place-items:center;z-index:90;opacity:0;pointer-events:none;
  transition:.3s var(--ease);
}
.to-top.is-on{opacity:1;pointer-events:auto}
.to-top:hover{background:var(--accent)}
.to-top svg{width:18px;height:18px;stroke:currentColor;fill:none;stroke-width:2}

/* ---------- 响应式 ---------- */
@media (max-width:1080px){
  .about-grid{gap:48px}
  .about-visual img{height:440px}
  .product-grid{grid-template-columns:repeat(2,1fr)}
  .sectors{grid-template-columns:repeat(2,1fr)}
  .sector{border-bottom:1px solid var(--line)}
  .sector:nth-child(2n){border-right:0}
  .quality-grid{grid-template-columns:1fr;gap:48px}
  .report-grid--4{grid-template-columns:repeat(3,1fr)}
  .prod-grid{grid-template-columns:1fr;gap:32px}
  .prod-media{position:static}
  .prod-media img{aspect-ratio:16/10}
  .prod-media img.is-fit{aspect-ratio:4/3}
  .contact-grid{grid-template-columns:1fr;gap:40px}
  .flow{grid-template-columns:repeat(2,1fr)}
  .value-grid{grid-template-columns:1fr}
  .stats-inner{grid-template-columns:1fr}
  .slogan{padding:24px 30px 26px}
  .slogan::before{left:30px}
  .slogan:nth-child(odd){border-right:0}
  .slogan:nth-child(-n+3){border-bottom:1px solid var(--line)}
  .slogan:nth-child(4){border-bottom:0}
}
@media (max-width:860px){
  .nav,.header-tel{display:none}
  .nav-toggle{display:flex}
  .site-header.is-open .nav{
    display:flex;position:absolute;left:0;right:0;top:78px;background:#fff;flex-direction:column;
    gap:0;padding:10px 0 18px;border-bottom:1px solid var(--line);box-shadow:0 20px 30px -22px rgba(10,37,64,.4);
  }
  .site-header.is-open .nav a{padding:14px 28px;width:100%;font-size:16px}
  .site-header.is-open .nav a::after{display:none}
  .section{padding:76px 0}
  .wrap.products-page{padding-top:54px;padding-bottom:72px}
  .section-head{margin-bottom:36px}
  .hero-inner{padding-top:78px;padding-bottom:104px}
  .stats{margin-top:-46px}
  .about-grid{grid-template-columns:1fr}
  .about-visual img{height:340px}
  .about-badge{position:static;margin-top:16px;max-width:none}
  .about-visual::before{display:none}
  .product-grid{grid-template-columns:1fr;gap:18px}
  .report-grid{grid-template-columns:repeat(2,1fr)}
  .report-grid--4{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .feat-grid{grid-template-columns:1fr}
  .cta-inner{flex-direction:column;align-items:flex-start}
  .filter-bar{top:64px}
  .header-inner{height:64px}
}
@media (max-width:560px){
  .wrap,.wrap-narrow{padding:0 20px}
  .header-inner{padding:0 20px}
  .hero-actions .btn{width:100%;justify-content:center}
  .hero h1{font-size:29px;line-height:1.24}
  .sectors{grid-template-columns:1fr}
  .sector{border-right:0}
  .flow{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .field-row{grid-template-columns:1fr}
  .form-card{padding:26px 20px}
  .prod-no{font-size:30px}
  .prod-head{flex-direction:column;align-items:flex-start;gap:10px}
  .prod-title span{font-size:10px;letter-spacing:.18em}
  .slogan{padding:18px 20px 20px}
  .slogan::before{left:20px;width:22px}
  .slogan-idx{font-size:10.5px}
  .slogan p{margin-top:9px;font-size:15.5px}
  .slogan p b{font-size:18.5px;margin:0 3px}
}

/* =========================================================
   产品目录 catalog.html
   ========================================================= */
.filter-inner{flex-wrap:wrap;padding:14px 0}
.filter-btn i{font-style:normal;opacity:.55;font-size:11.5px;margin-left:3px}
.cat-search{
  margin-left:auto;display:flex;align-items:center;gap:8px;
  border:1px solid var(--line-d);background:#fff;height:38px;padding:0 12px;min-width:280px;
}
.cat-search svg{width:15px;height:15px;flex:0 0 15px;stroke:var(--muted);fill:none;stroke-width:1.8}
.cat-search input{border:0;outline:none;background:transparent;font-family:inherit;font-size:13px;color:var(--ink);width:100%}
.cat-search input::placeholder{color:#A6B4BF}

.wrap.catalog-page{padding-top:44px;padding-bottom:96px}
.cat-count{font-size:12.5px;color:var(--muted);letter-spacing:.06em;margin-bottom:40px}
.cat-count b{color:var(--ink);font-size:15px;font-family:"DIN Alternate","Bahnschrift",Arial,sans-serif}

.cat-block{margin-bottom:74px;scroll-margin-top:150px}
.cat-block-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:28px;
  border-bottom:1px solid var(--line);padding-bottom:20px;margin-bottom:26px;
}
.cat-en{display:block;font-size:10.5px;letter-spacing:.28em;text-transform:uppercase;color:var(--pc);font-weight:600}
.cat-block-head h2{font-size:clamp(21px,2.5vw,29px);margin-top:9px;letter-spacing:.01em}
.cat-block-head p{margin-top:10px;font-size:14px;line-height:1.8;color:var(--body);max-width:660px}
.cat-num{
  font-family:"DIN Alternate","Bahnschrift",Arial,sans-serif;font-size:44px;line-height:.9;font-weight:700;
  color:var(--pc);opacity:.24;text-align:right;flex:0 0 auto;
}
.cat-num span{display:block;font-size:11px;letter-spacing:.12em;opacity:.95;margin-top:6px;font-weight:500}

.cat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;align-items:stretch}
.cat-item{
  background:#fff;border:1px solid var(--line);padding:22px 22px 20px;position:relative;
  transition:.3s var(--ease);overflow:hidden;display:flex;flex-direction:column;
}
.cat-item::before{
  content:"";position:absolute;left:0;top:0;width:3px;height:0;background:var(--pc);
  transition:height .4s var(--ease);
}
.cat-item:hover::before{height:100%}
.cat-item:hover{border-color:var(--line-d);box-shadow:0 24px 46px -32px rgba(10,37,64,.42)}
.cat-item[hidden]{display:none}

.cat-head{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:12px}
.cat-model{
  font-family:"DIN Alternate","Bahnschrift",Arial,sans-serif;font-size:12.5px;font-weight:700;
  letter-spacing:.05em;color:#fff;background:var(--pc);padding:4px 9px;
}
.cat-model--none{background:#DCE5EC;color:#4C5F6E}
.cat-tag{
  font-size:11px;color:var(--pc);border:1px solid currentColor;padding:3px 8px;letter-spacing:.02em;
  transition:.2s var(--ease);
}
.cat-tag--plain{color:var(--muted);border-color:var(--line-d)}
a.cat-tag:hover{background:var(--pc);color:#fff}
.cat-item h3{font-size:17.5px;line-height:1.45;letter-spacing:.01em}
.cat-desc{margin-top:10px;font-size:13.5px;line-height:1.8;color:var(--body)}
.cat-std{margin-top:14px;padding-top:10px;border-top:1px dashed var(--line);font-size:11.5px;color:var(--muted);line-height:1.7}

.cat-more{margin-top:auto;padding-top:14px}
.cat-more summary{
  cursor:pointer;list-style:none;display:flex;align-items:center;justify-content:space-between;
  font-size:13px;font-weight:600;color:var(--pc);letter-spacing:.02em;
}
.cat-more summary::-webkit-details-marker{display:none}
.cat-more summary::after{content:"+";font-size:16px;font-weight:400;line-height:1}
.cat-more[open] summary::after{content:"–"}
.cat-body{padding-top:16px;margin-top:12px;border-top:1px solid var(--line)}
.cat-body h4{
  display:flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.14em;color:var(--ink);
  margin:20px 0 10px;
}
.cat-body h4:first-child{margin-top:0}
.cat-body h4::before{content:"";width:3px;height:12px;background:var(--pc)}
.cat-hint{margin-left:auto;font-size:11px;letter-spacing:0;color:var(--muted);font-weight:400}
.cat-list li{position:relative;padding-left:14px;font-size:13px;line-height:1.8;color:var(--body);margin-bottom:6px}
.cat-list li::before{
  content:"";position:absolute;left:0;top:9px;width:4px;height:4px;background:var(--pc);transform:rotate(45deg);
}
.spec-wrap img{
  width:100%;display:block;margin-bottom:10px;border:1px solid var(--line);background:#fff;cursor:zoom-in;
  transition:border-color .25s;
}
.spec-wrap img:hover{border-color:var(--line-d)}
.cat-actions{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px}
.btn-sm{padding:10px 16px;font-size:13px}
.cat-empty{font-size:13px;color:var(--muted)}
.cat-empty-note{font-size:14px;color:var(--muted);padding:32px 0}

.cat-note{margin-top:24px;padding:56px 0;background:var(--bg);border-top:1px solid var(--line)}
.cat-note .wrap{display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cat-note p{max-width:780px;font-size:13.5px;line-height:1.95;color:var(--body)}
.cat-note b{color:var(--ink)}

@media (max-width:1080px){
  .cat-grid{grid-template-columns:repeat(2,1fr)}
  .cat-search{min-width:220px}
}
@media (max-width:860px){
  .wrap.catalog-page{padding-top:32px;padding-bottom:72px}
  .cat-block{margin-bottom:56px}
  .cat-block-head{flex-direction:column;align-items:flex-start;gap:14px}
  .cat-num{display:none}
  .cat-search{margin-left:0;width:100%;min-width:0}
}
@media (max-width:700px){
  .filter-inner{gap:6px;padding:12px 0}
  .filter-btn{padding:8px 12px;font-size:12.5px}
  .filter-btn i{display:none}
  .cat-grid{grid-template-columns:1fr;gap:16px}
  .cat-item{padding:20px 18px}
  .cat-note{padding:44px 0}
}

/* 首页产品区 -> 目录引导条 */
.catalog-cta{
  margin-top:34px;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
  background:#fff;border:1px solid var(--line);border-left:3px solid var(--accent);padding:26px 30px;
}
.catalog-cta h3{font-size:18px;letter-spacing:.01em}
.catalog-cta p{margin-top:8px;font-size:13.5px;line-height:1.85;color:var(--body);max-width:740px}
.catalog-cta > div{flex:1 1 460px}

/* 主导航 7 项后，1120px 以下收折到汉堡菜单 */
@media (max-width:1120px){
  .nav,.header-tel{display:none}
  .nav-toggle{display:flex}
  .site-header.is-open .nav{
    display:flex;position:absolute;left:0;right:0;top:78px;background:#fff;flex-direction:column;
    gap:0;padding:10px 0 18px;border-bottom:1px solid var(--line);box-shadow:0 20px 30px -22px rgba(10,37,64,.4);
  }
  .site-header.is-open .nav a{padding:14px 28px;width:100%;font-size:16px}
  .site-header.is-open .nav a::after{display:none}
}
@media (max-width:860px){
  .site-header.is-open .nav{top:64px}
  .catalog-cta{padding:22px 20px;gap:18px}
}

/* ---------- 首页：工地案例横向轮播 ---------- */
.cases{background:var(--white);border-top:1px solid var(--line);padding-bottom:96px}
.cases-head{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;margin-bottom:40px}
.cases-head-copy{margin-bottom:0}
.cases-ctrl{display:flex;align-items:center;gap:10px;padding-bottom:6px}
.cases-count{font-size:12.5px;letter-spacing:.16em;color:var(--muted);margin-right:6px;font-variant-numeric:tabular-nums}
.cases-count b{color:var(--navy);font-size:17px;letter-spacing:.05em}
.cases-count i{margin:0 5px;font-style:normal;color:var(--line-d)}
.cases-btn{
  width:44px;height:44px;flex:0 0 44px;display:grid;place-items:center;cursor:pointer;
  background:#fff;border:1px solid var(--line-d);color:var(--navy);transition:.25s var(--ease);
}
.cases-btn svg{width:18px;height:18px;stroke:currentColor;fill:none;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}
.cases-btn:hover{background:var(--navy);border-color:var(--navy);color:#fff}
.cases-btn:disabled{opacity:.32;cursor:default;background:#fff;color:var(--navy);border-color:var(--line)}
.cases-rail{
  display:flex;gap:20px;overflow-x:auto;overscroll-behavior-x:contain;
  scroll-snap-type:x mandatory;scrollbar-width:none;padding-bottom:4px;
  -webkit-overflow-scrolling:touch;
}
.cases-rail::-webkit-scrollbar{display:none}
.cases-rail:focus-visible{outline:2px solid var(--blue);outline-offset:4px}
.case-card{
  flex:0 0 calc((100% - 40px) / 3);scroll-snap-align:start;
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);
  transition:border-color .3s var(--ease),box-shadow .3s var(--ease),transform .3s var(--ease);
}
.case-card:hover{border-color:var(--line-d);box-shadow:var(--shadow);transform:translateY(-4px)}
.case-media{position:relative;overflow:hidden;background:var(--bg-2)}
.case-media img{width:100%;height:auto;aspect-ratio:16/10;object-fit:cover;transition:transform .8s var(--ease)}
.case-card:hover .case-media img{transform:scale(1.045)}
.case-no{
  position:absolute;left:0;top:0;padding:6px 11px;font-size:11.5px;letter-spacing:.18em;
  color:#fff;background:rgba(10,37,64,.82);backdrop-filter:blur(4px);font-variant-numeric:tabular-nums;
}
.case-body{padding:22px 22px 24px;display:flex;flex-direction:column;flex:1}
.case-tag{font-size:11px;letter-spacing:.2em;color:var(--accent);font-weight:600;text-transform:uppercase}
.case-body h3{font-size:17.5px;margin-top:10px;letter-spacing:.01em}
.case-body p{margin-top:12px;font-size:13.5px;line-height:1.85;color:var(--body)}
.case-link{
  margin-top:auto;padding-top:18px;font-size:12.5px;color:var(--blue);font-weight:600;
  display:inline-flex;align-items:center;gap:7px;letter-spacing:.02em;
}
.case-link svg{width:14px;height:14px;stroke:currentColor;fill:none;stroke-width:2;transition:transform .25s var(--ease)}
.case-link:hover{color:var(--accent)}
.case-link:hover svg{transform:translateX(4px)}
.cases-dots{display:flex;align-items:center;gap:8px;margin-top:28px}
.cases-dot{
  width:26px;height:3px;padding:0;border:0;background:var(--line-d);cursor:pointer;
  transition:background .25s var(--ease),width .25s var(--ease);
}
.cases-dot.is-active{background:var(--accent);width:44px}
@media (max-width:1000px){
  .case-card{flex:0 0 calc((100% - 20px) / 2)}
}
@media (max-width:700px){
  .cases{padding-bottom:76px}
  .cases-head{flex-direction:column;align-items:flex-start;gap:22px;margin-bottom:28px}
  .cases-ctrl{padding-bottom:0}
  .case-card{flex:0 0 86%}
  .case-body{padding:18px 18px 20px}
}
.cases-note{margin-top:18px;font-size:12px;color:var(--muted);letter-spacing:.02em}

/* =========================================================
   主打产品页：C60 高强无收缩灌浆料
   ========================================================= */
.fs-hero{
  position:relative;padding-top:78px;overflow:hidden;color:#fff;
  background:linear-gradient(115deg,#071B31 0%,#0A2540 46%,#133F63 100%);
}
.fs-ghost{
  position:absolute;right:-3%;top:4%;z-index:1;pointer-events:none;
  font-family:"DIN Alternate","Bahnschrift","Arial Narrow",Arial,sans-serif;
  font-size:clamp(160px,25vw,360px);font-weight:800;line-height:.8;letter-spacing:-.05em;
  color:rgba(255,255,255,.045);
}
.fs-hero-grid{
  position:relative;z-index:2;display:grid;grid-template-columns:1.12fr .88fr;gap:64px;align-items:center;
  padding-top:58px;padding-bottom:86px;
}
.fs-kicker{
  display:inline-flex;align-items:center;gap:12px;font-size:11.5px;letter-spacing:.3em;
  color:#8FB6D6;font-weight:600;
}
.fs-kicker::before{content:"";width:30px;height:2px;background:var(--accent)}
.fs-hero h1{color:#fff;font-size:clamp(30px,4.1vw,50px);letter-spacing:.03em;margin-top:20px;line-height:1.2}
.fs-sub{margin-top:14px;font-size:14.5px;letter-spacing:.18em;color:var(--accent-l);font-weight:600}
.fs-lead{margin-top:22px;max-width:580px;font-size:15.5px;line-height:2;color:rgba(255,255,255,.76)}
.fs-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}
.fs-tags span{
  font-size:12.5px;padding:7px 13px;letter-spacing:.05em;
  border:1px solid rgba(255,255,255,.22);color:rgba(255,255,255,.85);
}
.fs-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}

.fs-card{
  background:rgba(255,255,255,.055);border:1px solid rgba(255,255,255,.16);
  padding:30px 30px 22px;backdrop-filter:blur(6px);
}
.fs-card-head{
  display:block;font-size:11px;letter-spacing:.26em;color:#8FB6D6;font-weight:600;margin-bottom:6px;
}
.fs-row{
  display:flex;align-items:baseline;justify-content:space-between;gap:18px;
  padding:16px 0;border-bottom:1px dashed rgba(255,255,255,.14);
}
.fs-row b{
  font-family:"DIN Alternate","Bahnschrift","Arial Narrow",Arial,sans-serif;
  font-size:31px;font-weight:700;color:#fff;line-height:1;letter-spacing:-.01em;white-space:nowrap;
}
.fs-row b i{font-style:normal;font-size:13px;color:var(--accent-l);margin-left:4px;font-weight:600}
.fs-row span{font-size:12.5px;color:rgba(255,255,255,.6);letter-spacing:.04em;text-align:right;line-height:1.5}
.fs-card-note{display:block;margin-top:16px;font-size:11px;color:rgba(255,255,255,.4);letter-spacing:.01em}

/* 产品信息 */
.fs-two{display:grid;grid-template-columns:1.02fr .98fr;gap:60px;align-items:center}
.fs-points{display:grid;grid-template-columns:1fr 1fr;gap:18px 24px;margin-top:28px}
.fs-point{padding-left:16px;border-left:2px solid var(--accent)}
.fs-point strong{display:block;font-size:14.5px;color:var(--ink);margin-bottom:3px}
.fs-point span{font-size:13px;color:var(--muted);line-height:1.7}
.fs-list{list-style:none;margin:16px 0 0;padding:0;display:grid;gap:11px}
.fs-list li{position:relative;padding-left:18px;font-size:14.5px;color:var(--body);line-height:1.8}
.fs-list li::before{content:"";position:absolute;left:0;top:11px;width:6px;height:6px;background:var(--accent)}
.fs-figure{margin:0}
.fs-figure img{width:100%;aspect-ratio:4/3;object-fit:cover;border:1px solid var(--line)}
.fs-figure figcaption{margin-top:12px;font-size:12.5px;color:var(--muted);letter-spacing:.02em}
.fs-sub-h{font-size:14px;letter-spacing:.14em;color:var(--blue);font-weight:700;margin-top:32px;text-transform:uppercase}

/* 五大特点 */
.fs-bg{background:var(--bg);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.feat5{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.feat5 .item{background:#fff;padding:32px 30px 34px;position:relative;transition:background .3s var(--ease)}
.feat5 .item:hover{background:#FBFCFD}
.feat5 .no{
  font-family:"DIN Alternate","Bahnschrift","Arial Narrow",Arial,sans-serif;
  font-size:13px;font-weight:700;letter-spacing:.2em;color:var(--accent);display:block;
}
.feat5 h3{font-size:17px;margin-top:14px;letter-spacing:.02em}
.feat5 p{margin-top:10px;font-size:13.8px;line-height:1.9;color:var(--body)}
.feat5 .item::after{
  content:"";position:absolute;left:30px;top:0;width:34px;height:2px;background:var(--navy);
}

/* 性能指标表 */
.spec-table{width:100%;border-collapse:collapse;font-size:14px;background:#fff;border:1px solid var(--line)}
.spec-table caption{
  caption-side:top;text-align:left;font-size:12.5px;color:var(--muted);
  padding:0 0 14px;letter-spacing:.02em;
}
.spec-table th{
  background:var(--navy);color:#fff;font-size:12.5px;font-weight:600;letter-spacing:.08em;
  padding:14px 18px;text-align:left;white-space:nowrap;
}
.spec-table td{padding:13px 18px;border-top:1px solid var(--line);color:var(--body)}
.spec-table tr:nth-child(even) td{background:#FAFBFC}
.spec-table td.num{
  font-family:"DIN Alternate","Bahnschrift","Arial Narrow",Arial,sans-serif;
  font-size:16px;font-weight:700;color:var(--navy);white-space:nowrap;
}
.spec-table td.ok{color:#1B7A4C;font-weight:600;white-space:nowrap}
.spec-note{margin-top:16px;font-size:12.5px;color:var(--muted);line-height:1.9}
.spec-foot{display:flex;flex-wrap:wrap;gap:14px;margin-top:24px}

/* 适用范围 */
.scope-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.scope-grid .item{background:#fff;padding:28px 26px 30px}
.scope-grid .icon{
  width:38px;height:38px;display:grid;place-items:center;background:#EEF4F9;color:var(--blue-d);
  margin-bottom:16px;
}
.scope-grid .icon svg{width:19px;height:19px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.scope-grid h3{font-size:15.5px}
.scope-grid p{margin-top:8px;font-size:13.3px;line-height:1.85;color:var(--body)}

/* 施工工艺 */
.steps{margin:8px 0 0;padding:0 0 0 30px;list-style:none;border-left:2px solid var(--line)}
.steps li{position:relative;padding:0 0 32px 6px}
.steps li:last-child{padding-bottom:0}
.steps li::before{
  content:"";position:absolute;left:-39px;top:6px;width:16px;height:16px;background:#fff;
  border:2px solid var(--accent);
}
.steps b{display:block;font-size:15.5px;color:var(--ink);letter-spacing:.02em}
.steps .n{
  font-family:"DIN Alternate","Bahnschrift",Arial,sans-serif;font-size:12px;color:var(--accent);
  letter-spacing:.18em;font-weight:700;
}
.steps p{margin:8px 0 0;font-size:13.8px;line-height:1.9;color:var(--body)}
.method-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:42px}
.method-grid figure{margin:0;background:#fff;border:1px solid var(--line);padding:12px}
.method-grid img{width:100%;background:#F4F6F8}
.method-grid figcaption{padding:10px 4px 2px;font-size:12.5px;color:var(--muted);text-align:center;letter-spacing:.02em}

/* 厂家实拍 */
.factory-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.factory-grid figure{margin:0}
.factory-grid img{width:100%;aspect-ratio:6/5;object-fit:cover;border:1px solid var(--line)}
.factory-grid figcaption{margin-top:12px;font-size:12.5px;color:var(--muted);letter-spacing:.02em}
.factory-note{margin-top:22px;font-size:12.5px;color:var(--muted);line-height:1.9}

/* 检测报告 */
.report-grid.on-light .report{border:1px solid var(--line)}
.report-grid.on-light .report:hover{border-color:var(--line-d);box-shadow:var(--shadow)}

/* 底部 CTA */
.fs-cta{background:var(--navy);color:#fff;padding:76px 0;position:relative;overflow:hidden}
.fs-cta::after{
  content:"";position:absolute;right:-80px;top:-80px;width:320px;height:320px;
  border:1px solid rgba(255,255,255,.1);border-radius:50%;
}
.fs-cta h2{color:#fff;font-size:clamp(24px,3vw,32px)}
.fs-cta p{margin-top:14px;color:rgba(255,255,255,.7);max-width:620px;font-size:15px}
.fs-cta .actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}

@media (max-width:1180px){
  .fs-hero-grid{gap:44px}
  .feat5{grid-template-columns:repeat(2,1fr)}
  .scope-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:1000px){
  .fs-hero-grid{grid-template-columns:1fr;gap:38px;padding-top:44px;padding-bottom:64px}
  .fs-lead{max-width:none}
  .fs-card{max-width:520px}
  .fs-two{grid-template-columns:1fr;gap:36px}
  .method-grid{grid-template-columns:1fr;gap:14px}
  .factory-grid{gap:16px}
}
@media (max-width:700px){
  .feat5{grid-template-columns:1fr}
  .scope-grid{grid-template-columns:1fr}
  .fs-points{grid-template-columns:1fr;gap:14px}
  .factory-grid{grid-template-columns:1fr}
  .spec-table{table-layout:fixed;font-size:12.5px}
  .spec-table th,.spec-table td{padding:10px 8px}
  .spec-table th{white-space:normal;letter-spacing:.02em;line-height:1.5}
  .spec-table th:nth-child(1),.spec-table td:nth-child(1){width:34%}
  .spec-table th:nth-child(2),.spec-table td:nth-child(2){width:22%}
  .spec-table th:nth-child(3),.spec-table td:nth-child(3){width:26%}
  .spec-table th:nth-child(4),.spec-table td:nth-child(4){width:18%}
  .spec-table td.num{font-size:14.5px}
  .spec-table caption{font-size:11.5px;line-height:1.8}
  .fs-cta{padding:58px 0}
}

/* ---------- 首页：主打产品横带 ---------- */
.flagship{background:var(--navy);color:#fff;overflow:hidden}
.flagship-grid{display:grid;grid-template-columns:1fr 1fr;align-items:stretch}
.flagship-media{position:relative;min-height:440px;overflow:hidden}
.flagship-media img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.flagship-media::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(10,37,64,.05) 40%,rgba(10,37,64,.85))}
.flagship-badge{
  position:absolute;left:0;top:44px;z-index:2;background:var(--accent);color:#fff;
  font-size:11.5px;letter-spacing:.24em;font-weight:600;padding:9px 18px;
}
.flagship-copy{
  padding:72px 6vw 72px 66px;max-width:760px;
  display:flex;flex-direction:column;justify-content:center;align-items:flex-start;
}
.flagship-copy .eyebrow{color:#8FB6D6}
.flagship-copy h2{color:#fff;font-size:clamp(24px,2.6vw,34px);line-height:1.35;margin-top:6px}
.flagship-copy p{margin-top:18px;font-size:15px;line-height:1.95;color:rgba(255,255,255,.72)}
.flagship-stats{display:flex;flex-wrap:wrap;gap:38px;margin-top:30px}
.flagship-stats b{
  display:block;font-family:"DIN Alternate","Bahnschrift","Arial Narrow",Arial,sans-serif;
  font-size:30px;line-height:1;color:#fff;font-weight:700;
}
.flagship-stats b i{font-style:normal;font-size:12.5px;color:var(--accent-l);margin-left:3px;font-weight:600}
.flagship-stats span{display:block;margin-top:8px;font-size:12px;letter-spacing:.06em;color:rgba(255,255,255,.52)}
.flagship-copy .btn{margin-top:34px}
@media (max-width:1080px){
  .flagship-grid{grid-template-columns:1fr}
  .flagship-media{min-height:320px;order:2}
  .flagship-media::after{background:linear-gradient(180deg,rgba(10,37,64,.05),rgba(10,37,64,.6))}
  .flagship-copy{padding:56px 24px 48px;max-width:none;order:1}
  .flagship-badge{top:16px;left:0}
}
@media (max-width:700px){
  .flagship-media{min-height:240px}
  .flagship-stats{gap:26px}
  .flagship-stats b{font-size:26px}
}

/* 产品目录：主打产品标签 */
.cat-tag--hot{color:var(--accent);border-color:var(--accent);font-weight:600}
a.cat-tag--hot:hover{background:var(--accent);color:#fff}


/* ---------- 首页 SEO 内容区（品牌介绍 + 热门产品内链 + 关键词） ---------- */
.seo-block{padding:88px 0;background:var(--bg);border-top:1px solid var(--line);scroll-margin-top:96px}
.seo-grid{display:grid;grid-template-columns:1.45fr .85fr;gap:64px;align-items:start}
.seo-kicker{display:block;font-size:10.5px;letter-spacing:.28em;color:var(--blue);font-weight:700}
.seo-block h2{font-size:clamp(22px,2.4vw,30px);line-height:1.42;margin-top:12px;letter-spacing:.01em}
.seo-copy p{margin-top:18px;font-size:14.5px;line-height:2.05;color:var(--body)}
.seo-copy a{
  color:var(--blue);text-decoration:underline;text-decoration-thickness:1px;
  text-decoration-color:rgba(22,104,168,.28);text-underline-offset:3px;transition:.2s;
}
.seo-copy a:hover{color:var(--accent);text-decoration-color:rgba(222,108,30,.5)}
.seo-hot{background:#fff;border:1px solid var(--line);padding:30px 30px 26px}
.seo-hot h3{font-size:13px;letter-spacing:.14em;color:var(--ink);margin-bottom:18px;display:flex;align-items:center;gap:9px;font-weight:600}
.seo-hot h3::before{content:"";width:3px;height:13px;background:var(--accent)}
.seo-hot ul{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:1fr 1fr;gap:11px 16px}
.seo-hot a{font-size:12.5px;color:#41566B;display:flex;align-items:center;gap:7px;transition:.2s}
.seo-hot a::before{content:"";width:4px;height:4px;background:var(--blue);transform:rotate(45deg);flex:0 0 4px}
.seo-hot a:hover{color:var(--accent)}
.seo-hot .seo-more{display:inline-flex;align-items:center;gap:8px;margin-top:22px;padding-top:16px;border-top:1px solid var(--line);width:100%;font-size:12.5px;color:var(--blue);letter-spacing:.04em}
.seo-hot .seo-more::before{display:none}
.seo-hot .seo-more svg{width:14px;height:14px;stroke:currentColor;fill:none;stroke-width:1.9}
.seo-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:38px;padding-top:26px;border-top:1px solid var(--line-d)}
.seo-tags a{font-size:12px;color:#5B7086;border:1px solid var(--line-d);background:#fff;padding:6px 12px;transition:.22s var(--ease)}
.seo-tags a:hover{border-color:var(--blue);color:var(--blue);background:#F1F7FC}

/* ---------- 首页常见问题 ---------- */
.faq{padding:88px 0;background:#fff;border-top:1px solid var(--line);scroll-margin-top:96px}
.faq-list{margin-top:38px;border-top:1px solid var(--line);max-width:920px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  cursor:pointer;list-style:none;display:flex;align-items:flex-start;gap:12px;
  padding:20px 0;font-size:15.5px;font-weight:600;color:var(--ink);line-height:1.65;
  transition:color .2s;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::before{
  content:"Q";font-family:inherit;font-size:11.5px;
  color:var(--accent);font-weight:700;margin-top:5px;letter-spacing:.02em;flex:0 0 auto;
}
.faq-item summary::after{content:"+";margin-left:auto;padding-left:18px;font-size:19px;font-weight:400;color:var(--muted);line-height:1}
.faq-item[open] summary::after{content:"\2013"}
.faq-item summary:hover{color:var(--blue)}
.faq-item p{padding:0 0 24px 24px;font-size:14px;line-height:2.05;color:var(--body);max-width:840px}

@media (max-width:1080px){
  .seo-block,.faq{padding:72px 0}
  .seo-grid{grid-template-columns:1fr;gap:38px}
  .seo-hot{max-width:560px}
}
@media (max-width:700px){
  .seo-block,.faq{padding:56px 0}
  .seo-copy p{font-size:13.5px;line-height:1.95}
  .seo-hot{padding:22px 22px 20px;max-width:none}
  .seo-hot ul{grid-template-columns:1fr}
  .faq-item summary{font-size:14.5px;padding:17px 0}
  .faq-item p{padding-left:0;font-size:13.5px}
}