:root{--b:#0b5cab;--n:#071a2e;--g:#f2a900;--m:#5d6b78;--l:#dbe5ee}*{box-sizing:border-box}body{margin:0;font:16px/1.7 system-ui,"Microsoft YaHei";color:#102030;background:#f5f8fb}a{text-decoration:none;color:inherit}.wrap{width:min(1160px,calc(100% - 32px));margin:auto}.top{background:#061522;color:#d4e0ea;font-size:13px;padding:6px 0}.top .wrap,.head .wrap{display:flex;justify-content:space-between;align-items:center}.head{height:76px;background:#fff;border-bottom:1px solid var(--l);position:sticky;top:0;z-index:5}.brand{font-size:22px;font-weight:900;color:var(--b)}nav{display:flex;gap:25px;align-items:center;font-weight:700}.btn{display:inline-block;background:var(--g);color:#17212b;padding:11px 19px;border:0;border-radius:9px;font-weight:900;cursor:pointer}.hero{color:#fff;background:linear-gradient(115deg,#071a2e,#0c4775);padding:100px 0}.hero .wrap{display:grid;grid-template-columns:1.15fr .85fr;gap:55px;align-items:center}.ey{color:#ffd370;font-size:13px;letter-spacing:.15em;font-weight:900}.hero h1{font-size:58px;line-height:1.12;margin:15px 0}.hero p{font-size:19px;color:#d8e7f4}.machine{height:310px;border:9px solid #dce8f2;border-radius:30px 100px 30px 30px;background:linear-gradient(145deg,#eaf3fb,#8faabd);box-shadow:0 35px 60px #0007;position:relative}.machine:before{content:'永兴锅炉';position:absolute;left:40px;top:50px;color:var(--b);font-size:27px;font-weight:900}.machine:after{content:'';position:absolute;right:55px;top:70px;width:80px;height:80px;border:10px solid #28475d;border-radius:50%;background:#c9edff}.metrics{background:#fff}.metrics .wrap{display:grid;grid-template-columns:repeat(4,1fr)}.metric{text-align:center;padding:23px;border-right:1px solid var(--l)}.metric b{display:block;font-size:28px;color:var(--b)}section{padding:75px 0}.section-head{margin-bottom:30px}.section-head h2,.page h1{font-size:38px;margin:5px 0}.section-head p,.card p,.prose p,.prose li{color:var(--m)}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.card,.prose{background:#fff;border:1px solid var(--l);border-radius:17px;padding:26px;box-shadow:0 10px 30px #102a4310}.card:hover{transform:translateY(-4px);transition:.2s}.icon{display:grid;place-items:center;width:50px;height:50px;border-radius:13px;background:#eaf4ff;color:var(--b);font-size:24px;font-weight:900}.link{color:var(--b);font-weight:800}.dark{background:var(--n);color:#fff}.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:15px}.steps div{background:#103554;padding:24px;border-radius:15px}.cta{background:linear-gradient(100deg,#0b5cab,#073665);color:#fff;border-radius:22px;padding:38px;display:grid;grid-template-columns:1fr 1fr;gap:30px}.form{display:grid;grid-template-columns:1fr 1fr;gap:12px;background:#fff;padding:22px;border-radius:16px}.form input,.form select,.form textarea{padding:12px;border:1px solid #b9cbd9;border-radius:8px;font:inherit}.full{grid-column:1/-1}.footer{background:#061522;color:#bdcbd6;padding:50px 0}.page{background:linear-gradient(110deg,#091d31,#14527e);color:#fff;padding:70px 0}.prose h2{font-size:28px;margin-top:30px}.table{width:100%;border-collapse:collapse}.table td,.table th{border:1px solid var(--l);padding:12px;text-align:left}.notice{border-left:5px solid var(--g);background:#fff7df;padding:17px}.float{position:fixed;right:18px;bottom:18px;background:var(--b);color:#fff;padding:12px 18px;border-radius:30px;font-weight:900}.thanks{text-align:center;padding:110px 20px}@media(max-width:800px){nav{display:none}.hero .wrap,.cta{grid-template-columns:1fr}.hero h1{font-size:40px}.machine{height:230px}.grid{grid-template-columns:1fr 1fr}.metrics .wrap,.steps{grid-template-columns:1fr 1fr}}@media(max-width:520px){.grid,.form,.metrics .wrap,.steps{grid-template-columns:1fr}.hero{padding:60px 0}.full{grid-column:1}.metric{border-bottom:1px solid var(--l)}.float{left:15px;right:15px;text-align:center}}
/* v0.2 legacy brand bridge */
.brand{display:flex;align-items:center;gap:10px;color:#263846}.brand-logo{width:44px;height:44px;border-radius:50%;background:conic-gradient(from 15deg,#e3232e 0 28%,#fff 28% 36%,#1671b9 36% 64%,#fff 64% 72%,#e3232e 72%);border:2px solid #d8e0e6;position:relative}.brand-logo:after{content:'Y';position:absolute;inset:9px;background:#fff;border-radius:50%;display:grid;place-items:center;color:#1470b5;font-weight:1000}.brand-name b{display:block;font-size:20px}.brand-name small{font-size:10px;color:#7a8790}.legacy-hero{position:relative;background:linear-gradient(115deg,#f9fbfd 0 18%,#e9edf1 18% 58%,#cfd7dd 100%);color:#202d37;overflow:hidden;border-bottom:5px solid #bd1d25}.legacy-hero:after{content:'';position:absolute;left:0;right:0;bottom:0;height:85px;background:linear-gradient(165deg,transparent 0 46%,#a81019 47% 75%,#d9262e 76%);opacity:.95}.legacy-hero .wrap{min-height:500px;display:grid;grid-template-columns:.85fr 1.15fr;align-items:center;gap:35px;position:relative;z-index:2}.legacy-hero h1{font-size:54px;line-height:1.12;margin:12px 0;color:#9f141b}.legacy-hero p{font-size:18px;color:#3f4c56}.red-machine{height:300px;border-radius:125px 28px 28px 125px;background:linear-gradient(160deg,#f73b43,#b50f18 70%);border:9px solid #e7edf1;box-shadow:inset -25px -20px 30px #69050c66,0 28px 55px #26384655;position:relative;z-index:3}.red-machine:before{content:'河南永兴锅炉';position:absolute;left:120px;top:52px;color:#fff;font-size:25px;font-weight:900;border-bottom:2px solid #fff;padding-bottom:8px}.red-machine:after{content:'';position:absolute;left:18px;top:45px;width:170px;height:190px;border:15px solid #5f0c12;border-radius:50%;background:radial-gradient(circle,#222 0 22%,#f5f5f5 23% 48%,#b8131c 49%)}.legacy-trust{display:flex;gap:20px;flex-wrap:wrap;font-size:13px;font-weight:700}.product-visual{height:150px;border-radius:13px;margin-bottom:18px;background:linear-gradient(145deg,#eff3f5,#c8d0d5);position:relative;overflow:hidden}.product-visual:before{content:'';position:absolute;left:20px;right:20px;top:37px;height:68px;border-radius:35px 11px 11px 35px;background:linear-gradient(155deg,#ee343c,#a70912)}.product-visual:after{content:'';position:absolute;left:27px;top:48px;width:45px;height:45px;border:8px solid #65080e;border-radius:50%;background:#eee}.old-accent{color:#15913a}.proof-strip{background:#fff;border-top:1px solid #eee;border-bottom:1px solid #eee}.proof-strip .wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:#eee}.proof{background:#fff;text-align:center;padding:22px}.proof b{display:block;color:#e27d00;font-size:18px}@media(max-width:800px){.legacy-hero .wrap{grid-template-columns:1fr;padding:60px 0}.legacy-hero h1{font-size:40px}.red-machine{height:230px}.proof-strip .wrap{grid-template-columns:1fr 1fr}}
.brand-lockup{width:360px;height:auto;display:block}.photo-hero{padding:0;height:442px;background:#e9ecef}.hero-photo{position:absolute;inset:0;background:url('/assets/legacy-hero.webp') center/cover no-repeat}.hero-overlay{position:relative;z-index:2;height:100%;display:flex;align-items:center}.hero-copy{max-width:560px;padding:30px;background:linear-gradient(90deg,rgba(255,255,255,.96),rgba(255,255,255,.78));border-left:5px solid #b5141c;box-shadow:0 12px 40px #0002}.hero-copy h1{font-size:44px}.hero-copy p{color:#273743}.ghost{background:#fff;border:1px solid #b5141c;color:#9f141b;margin-left:8px}@media(max-width:800px){.brand-lockup{width:280px}.photo-hero{height:auto;min-height:500px}.hero-photo{opacity:.35}.hero-overlay{min-height:500px}.hero-copy{background:rgba(255,255,255,.9)}.hero-copy h1{font-size:36px}}
.proof-section{background:#fff}.proof-grid{display:grid;grid-template-columns:1fr .8fr 1fr;gap:25px;align-items:center}.proof-grid figure{margin:0;background:#f5f7f9;border:1px solid var(--l);padding:10px;border-radius:14px}.proof-grid img{width:100%;height:250px;object-fit:cover;border-radius:9px}.proof-grid figcaption{text-align:center;padding:8px 0 2px;color:var(--m);font-size:14px}.proof-copy{padding:20px}.proof-copy h3{font-size:27px;margin:0 0 10px}@media(max-width:800px){.proof-grid{grid-template-columns:1fr}.proof-grid img{height:auto}}