:root{--ink:#0B2341;--ink-2:#1C3B69;--paper:#F3F5F7;--white:#fff;--muted:#5F6E7F;--line:#D6DCE4;--accent:#F1AD00;--accent-dark:#8A5300;--accent-light:#FFD46A;--blue:#294B70;--foam:#F4F0E4;--sand:#E7ECF2;--verified:#1e6d59;--provided:#9a5a18;--todo:#7c4b52;--safe:max(22px,calc((100vw - 1180px)/2));--shadow:0 20px 58px rgba(12,28,37,.14)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:"PingFang SC","Noto Sans CJK SC","Microsoft YaHei",sans-serif;line-height:1.75}img{display:block;max-width:100%}a{color:inherit;text-decoration:none}button{font:inherit}.skip{position:fixed;top:-80px;left:20px;z-index:100;background:#fff;padding:10px 16px}.skip:focus{top:20px}.demo-note{background:var(--ink);color:#E6EBF0;font-size:12px;letter-spacing:.03em;text-align:center;padding:8px 22px}.demo-note b{color:#F4C44E}.nav{height:78px;background:rgba(255,255,255,.97);display:flex;align-items:center;padding:0 var(--safe);position:sticky;top:0;z-index:30;border-bottom:1px solid rgba(20,35,45,.1)}.brand{display:flex;align-items:center;gap:12px;margin-right:auto;line-height:1.15}.brand-logo{width:58px;height:58px;object-fit:contain}.brand-copy{display:flex;flex-direction:column;justify-content:center}.brand strong{font-family:"Songti SC","STSong",serif;font-size:20px;letter-spacing:.04em}.brand small{margin-top:5px;color:var(--muted);font-size:9px;letter-spacing:.1em;text-transform:uppercase}.nav-links{display:flex;gap:30px;font-size:14px;font-weight:650}.nav-links a{padding:26px 0;border-bottom:2px solid transparent}.nav-links a:hover,.nav-links a:focus{color:var(--accent-dark);border-color:var(--accent)}.nav-cta{margin-left:32px;background:var(--accent);color:var(--ink);padding:12px 19px;font-size:14px;font-weight:750}.menu{display:none;border:0;background:none;font-size:25px;min-width:44px;min-height:44px}.hero{min-height:710px;padding:0;position:relative;color:#fff;background:var(--ink);overflow:hidden;display:grid;grid-template-columns:minmax(0,1fr);align-items:center}.hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center}.hero:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(6,18,26,.94) 0%,rgba(10,25,34,.78) 39%,rgba(11,26,34,.17) 73%),linear-gradient(0deg,rgba(7,17,23,.5),transparent 48%)}.hero-main{position:relative;z-index:2;width:100%;padding:98px var(--safe) 130px;display:grid;grid-template-columns:minmax(0,1fr)}.eyebrow{display:flex;align-items:center;gap:11px;text-transform:uppercase;font-size:12px;letter-spacing:.19em;font-weight:750}.eyebrow:before{content:"";width:35px;height:2px;background:var(--accent)}h1{font-family:"Songti SC","STSong",serif;font-size:clamp(47px,5vw,75px);line-height:1.13;letter-spacing:-.025em;margin:23px 0 22px;max-width:1100px}.hero p{font-size:18px;color:#E7ECF1;max-width:820px;margin:0 0 33px}.hero-actions{display:flex;gap:14px;flex-wrap:wrap}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:50px;padding:0 24px;border:1px solid transparent;font-weight:750;font-size:15px;transition:background-color .2s,color .2s,border-color .2s,transform .2s}.btn.primary{background:var(--accent);color:var(--ink)}.btn.primary:hover{background:#D99600;transform:translateY(-2px)}.btn.ghost{border-color:rgba(255,255,255,.56);color:#fff}.btn.ghost:hover{background:#fff;color:var(--ink)}.hero-proof{position:absolute;z-index:3;bottom:0;right:var(--safe);left:var(--safe);display:grid;grid-template-columns:repeat(3,1fr);background:#fff;color:var(--ink);box-shadow:var(--shadow)}.proof{padding:22px 27px;border-right:1px solid var(--line)}.proof:last-child{border:0}.proof b{display:block;font-size:15px}.proof span{font-size:13px;color:var(--muted)}.visual-note{position:absolute;right:18px;bottom:112px;z-index:4;background:rgba(9,22,29,.8);color:#E4E9EF;font-size:10px;padding:6px 9px}section{padding:102px var(--safe)}section[id]{scroll-margin-top:110px}.section-label{font-size:12px;letter-spacing:.19em;text-transform:uppercase;color:var(--accent-dark);font-weight:800}.intro{display:grid;grid-template-columns:.78fr 1.38fr;gap:90px;background:#fff}.intro h2,.section-head h2,.quality h2,.faq h2,.contact h2{font-family:"Songti SC","STSong",serif;font-size:clamp(34px,4vw,54px);line-height:1.24;margin:14px 0 20px}.intro-copy>p{font-size:21px;line-height:1.68;margin:0 0 25px}.definition{border-top:1px solid var(--line);padding-top:22px;color:var(--muted)}.definition strong{color:var(--ink)}.status-key{display:flex;gap:12px;flex-wrap:wrap;margin-top:25px}.status{display:inline-flex;align-items:center;gap:7px;font-size:11px;font-weight:750;padding:5px 9px;border:1px solid currentColor}.status:before{content:"";width:6px;height:6px;border-radius:50%;background:currentColor}.verified{color:var(--verified)}.provided{color:var(--provided)}.todo-status{color:var(--todo)}.products{background:var(--paper)}.section-head{display:grid;grid-template-columns:1fr .82fr;gap:75px;align-items:end;margin-bottom:50px}.section-head p{color:var(--muted);margin:0 0 12px}.category{display:grid;grid-template-columns:185px 1fr;border-top:1px solid #aeb4b4;padding:0}.category-title{padding:30px 24px 30px 0}.category-title b{font-family:"Songti SC",serif;font-size:28px}.category-title p{font-size:13px;color:var(--muted);margin:7px 0}.product-list{border-left:1px solid var(--line)}.product-row{display:grid;grid-template-columns:1fr 1.15fr 142px;gap:28px;align-items:center;padding:26px 20px 26px 32px;border-bottom:1px solid #bdc0bf;transition:background-color .2s}.product-row:hover{background:#fff}.product-row h3{font-size:19px;margin:0}.product-row p{font-size:14px;color:var(--muted);margin:0}.tag{justify-self:end;border:1px solid #aeb3b4;padding:6px 10px;font-size:11px;white-space:nowrap}.spec-missing{margin-top:30px;background:#fff;border:1px dashed #a89991;padding:22px 25px;display:grid;grid-template-columns:170px 1fr;gap:26px}.spec-missing b{font-size:14px}.spec-missing p{margin:0;color:var(--muted);font-size:13px}.applications{background:#fff}.application-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:70px}.use-cases{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid var(--line);border-left:1px solid var(--line)}.use{padding:30px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);min-height:190px}.use small{color:var(--accent-dark);font-weight:800}.use h3{margin:16px 0 8px;font-size:19px}.use p{margin:0;color:var(--muted);font-size:14px}.decision{background:var(--sand);padding:40px;align-self:start;position:sticky;top:105px}.decision h3{font-family:"Songti SC",serif;font-size:27px;margin:0 0 18px}.decision ol{margin:0;padding-left:22px}.decision li{margin:11px 0}.decision .btn{margin-top:23px;background:var(--ink);color:#fff;width:100%}.cases{background:var(--paper)}.case-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:21px}.case-card{min-height:335px;background:var(--ink);color:#fff;padding:32px;display:flex;flex-direction:column;justify-content:space-between;position:relative;overflow:hidden}.case-card:before{content:"";position:absolute;width:145px;height:145px;border:1px solid rgba(255,255,255,.13);right:-40px;top:-42px;transform:rotate(35deg)}.case-card small{color:#E3A000;font-weight:800;letter-spacing:.07em}.case-card h3{font-family:"Songti SC",serif;font-size:26px;line-height:1.35;margin:19px 0 11px}.case-card p{color:#bcc6ca;font-size:14px;margin:0}.case-detail-link:after{content:"";position:absolute;inset:0}.case-meta{position:relative;z-index:2;border-top:1px solid rgba(255,255,255,.18);padding-top:17px;font-size:12px;color:#E7ECF1}.case-muted{background:#E6E9EC;color:var(--ink)}.case-muted p,.case-muted .case-meta{color:var(--muted)}.case-muted .case-meta{border-color:#c2c6c1}.source-link{text-decoration:underline;text-underline-offset:3px}.case-more{display:flex;justify-content:flex-end;margin-top:28px}.case-more .btn{background:var(--accent);color:var(--ink)}.project-list{margin-top:24px;border-top:1px solid var(--line)}.project-list div{display:grid;grid-template-columns:1.2fr 1fr 150px;gap:24px;padding:18px 0;border-bottom:1px solid var(--line);align-items:center}.project-list b{font-size:14px}.project-list span{color:var(--muted);font-size:13px}.quality{padding:0;background:var(--ink);color:#fff;display:grid;grid-template-columns:1fr 1fr;min-height:680px}.quality-media{position:relative}.quality-media img{width:100%;height:100%;object-fit:cover}.quality-media:after{content:"水泥发泡剂产品实拍";position:absolute;left:20px;bottom:18px;background:rgba(8,20,27,.82);padding:7px 10px;font-size:10px;color:#E7ECF1}.quality-copy{padding:84px max(48px,calc((100vw - 1180px)/2));padding-left:75px}.quality-copy>p{color:#bbc5c9;max-width:600px}.quality-link{display:inline-flex;margin-top:24px;border:1px solid rgba(255,255,255,.45);padding:11px 16px;font-size:13px;font-weight:750}.quality-link:hover{background:#fff;color:var(--ink)}.steps{margin-top:40px}.step{display:grid;grid-template-columns:54px 1fr;gap:19px;padding:19px 0;border-top:1px solid rgba(255,255,255,.18)}.step-num{color:var(--accent);font-family:Georgia,serif;font-size:23px}.step h3{font-size:16px;margin:0 0 4px}.step p{font-size:13px;margin:0;color:#aeb9bd}.evidence{background:#fff}.evidence-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:78px}.evidence-lead{font-family:"Songti SC",serif;font-size:clamp(29px,3vw,42px);line-height:1.46;margin:15px 0}.evidence-list{border-top:1px solid var(--line)}.evidence-item{display:grid;grid-template-columns:130px 1fr;gap:28px;padding:22px 0;border-bottom:1px solid var(--line)}.evidence-item b{font-size:13px}.evidence-item p{margin:0;color:var(--muted);font-size:14px}.evidence-item a{text-decoration:underline;text-underline-offset:3px}.delivery{background:#E5E9ED}.timeline{display:grid;grid-template-columns:repeat(4,1fr);margin-top:50px}.timeline-item{position:relative;padding:32px 27px 0 0;border-top:2px solid var(--ink)}.timeline-item:before{content:"";position:absolute;width:12px;height:12px;background:var(--accent);top:-7px;left:0}.timeline-item b{font-family:Georgia,serif;color:var(--accent-dark);font-size:14px}.timeline-item h3{font-size:18px;margin:13px 0 7px}.timeline-item p{font-size:13px;color:var(--muted);margin:0}.about{background:var(--paper);display:grid;grid-template-columns:.84fr 1.16fr;gap:90px}.about-statement{font-family:"Songti SC",serif;font-size:clamp(28px,3.2vw,43px);line-height:1.5;margin:15px 0}.about-copy{border-top:1px solid var(--line)}.about-row{display:grid;grid-template-columns:160px 1fr;gap:28px;padding:22px 0;border-bottom:1px solid var(--line)}.about-row b{font-size:14px}.about-row p{margin:0;color:var(--muted);font-size:14px}.faq{background:#fff;display:grid;grid-template-columns:.73fr 1.27fr;gap:88px}.faq-intro{position:sticky;top:110px;align-self:start}.faq-list{border-top:1px solid var(--line)}details{border-bottom:1px solid var(--line)}summary{list-style:none;cursor:pointer;padding:24px 42px 24px 0;font-weight:750;position:relative}summary::-webkit-details-marker{display:none}summary:after{content:"+";position:absolute;right:6px;font-size:24px;font-weight:400;top:17px;color:var(--accent-dark)}details[open] summary:after{content:"−"}details p{margin:0;padding:0 42px 24px 0;color:var(--muted);font-size:15px}.contact{background:var(--ink);color:#fff;display:grid;grid-template-columns:1.05fr .95fr;gap:82px}.contact p{color:#bbc5c9}.contact .btn{background:#fff;color:var(--ink);border-color:#fff;margin:21px 0 5px}.contact .btn:hover{background:var(--accent-light);border-color:var(--accent-light)}.phone{font-family:Georgia,serif;font-size:33px;margin:21px 0 5px;display:inline-block}.contact-panel{background:#fff;color:var(--ink);padding:36px}.contact-panel dl{margin:0}.contact-panel div{padding:14px 0;border-bottom:1px solid var(--line)}dt{font-size:12px;color:var(--muted)}dd{margin:4px 0 0;font-weight:750}.preview-warning{font-size:12px;color:#7d3f20;background:#fff1e8;padding:12px;margin-top:17px}.footer{padding:29px var(--safe);display:flex;gap:20px;justify-content:space-between;align-items:center;background:#0d1820;color:#a8b2b6;font-size:12px}.footer-records{display:flex;gap:20px;flex-wrap:wrap}.footer a{text-decoration:underline}.js-motion .reveal{opacity:0;transform:translateY(16px);transition:opacity .65s ease,transform .65s ease}.js-motion .reveal.on{opacity:1;transform:none}:focus-visible{outline:3px solid #C98700;outline-offset:3px}@media(min-width:1024px){.hero-main>div{width:96%;min-width:900px;max-width:1180px}.hero-main h1{width:100%;max-width:none;font-size:clamp(50px,4.45vw,64px);white-space:nowrap}.intro{grid-template-columns:1fr;gap:28px}.intro-copy{max-width:1000px}.section-head h2{font-size:clamp(34px,3.2vw,46px);white-space:nowrap}.quality h2{font-size:36px;white-space:nowrap}}@media(max-width:860px){.demo-note{text-align:left;overflow-wrap:anywhere}.nav{height:68px}.nav-links,.nav-cta{display:none}.menu{display:block}.nav.open{height:auto;flex-wrap:wrap;padding-top:12px;padding-bottom:12px}.nav.open .nav-links{display:flex;order:3;width:100%;flex-direction:column;gap:0;padding-top:10px}.nav.open .nav-links a{padding:12px 0}.hero{min-height:0;display:block;padding-top:1px}.hero-main{grid-template-columns:1fr;padding:78px 22px 43px}.hero-bg{object-position:63% center}.hero-proof{position:relative;grid-template-columns:1fr;right:auto;left:auto;bottom:auto;margin:0 22px 22px}.proof{padding:12px 17px;border-right:0;border-bottom:1px solid var(--line)}.visual-note{bottom:300px}h1{font-size:44px}.intro,.section-head,.application-grid,.quality,.evidence-grid,.faq,.contact,.about{grid-template-columns:1fr;gap:38px}.intro{gap:26px}.category{grid-template-columns:1fr}.category-title{padding-bottom:17px}.product-list{border-left:0}.product-row{grid-template-columns:1fr}.product-row p{grid-column:1}.tag{justify-self:start}.spec-missing{grid-template-columns:1fr;gap:7px}.use-cases{grid-template-columns:1fr}.case-grid{grid-template-columns:1fr}.case-card{min-height:275px}.project-list div{grid-template-columns:1fr;gap:4px}.quality-media{min-height:410px}.quality-copy{padding:62px 22px}.evidence-item,.about-row{grid-template-columns:1fr;gap:7px}.decision,.faq-intro{position:static}.timeline{grid-template-columns:1fr 1fr;gap:24px}.footer{align-items:flex-start;flex-direction:column}section{padding:72px 22px}.section-head{margin-bottom:38px}.visual-note{right:8px}}@media(max-width:520px){.hero h1{font-size:36px}.hero p{font-size:16px}.hero-actions .btn{width:100%}.intro-copy>p{font-size:18px}.timeline{grid-template-columns:1fr}.use{min-height:auto}.contact-panel{padding:24px}.visual-note{display:none}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.js-motion .reveal{opacity:1;transform:none;transition:none}.btn,.product-row{transition:none}}
:where(h1,h2,h3,h4,h5,h6){scroll-margin-top:96px}:where(a,button,summary){touch-action:manipulation}.nowrap{white-space:nowrap}
