:root{--paper:#f6f1e8;--paper2:#ebe1d2;--ink:#181714;--muted:#6c665d;--line:#d2c7b7;--wine:#7c3038;--dark:#1f211d;--white:#fffdf8;--max:1440px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",Arial,sans-serif;font-size:18px;line-height:1.72;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}a:hover{opacity:.72}.shell{width:min(calc(100% - 96px),var(--max));margin-inline:auto}h1,h2,h3{font-family:"Songti SC","STSong","SimSun",serif;margin:0;font-weight:700;letter-spacing:-.025em}.eyebrow{margin:0 0 18px;color:var(--wine);font-size:12px;font-weight:800;letter-spacing:.14em}
.site-header{position:sticky;top:0;z-index:50;background:rgba(246,241,232,.97);border-bottom:1px solid rgba(24,23,20,.14)}.nav{height:82px;display:flex;align-items:center;gap:28px}.brand{display:flex;align-items:baseline;gap:12px;flex:none}.brand-cn{font-family:"Songti SC","STSong","SimSun",serif;font-size:30px;font-weight:700}.brand-sub{font-size:9px;letter-spacing:.2em;color:var(--muted)}.menu{margin-left:auto;display:flex;align-items:center;gap:24px}.menu a,.lang summary{font-size:14px;font-weight:700;white-space:nowrap}.lang{margin-left:12px;position:relative}.lang summary{cursor:pointer;list-style:none}.lang summary::-webkit-details-marker{display:none}.lang-menu{position:absolute;right:0;top:34px;width:190px;padding:8px;background:var(--white);border:1px solid var(--line);box-shadow:0 18px 40px rgba(0,0,0,.08)}.lang-menu a{display:block;padding:9px 10px;font-size:14px}.mobile-nav{display:none;margin-left:auto}.mobile-nav summary{cursor:pointer;list-style:none;font-weight:800}.mobile-menu{position:fixed;left:16px;right:16px;top:70px;background:var(--white);border:1px solid var(--line);padding:12px 18px;box-shadow:0 18px 40px rgba(0,0,0,.1)}.mobile-menu a{display:block;padding:11px 0;border-bottom:1px solid var(--line)}
.hero{padding:104px 0 96px;border-bottom:1px solid var(--line)}.hero-grid{display:flex;justify-content:space-between;gap:96px;align-items:flex-end}.hero-grid>div:first-child{flex:1 1 820px;min-width:0}.hero-side{flex:0 0 430px;border-top:2px solid var(--ink)}.hero h1{font-size:clamp(64px,5.3vw,94px);line-height:1.02;max-width:900px}.hero-lead{font-size:22px;max-width:820px;margin:28px 0 0}.hero-note{max-width:780px;margin:12px 0 0;color:var(--muted)}.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:32px}.btn{display:inline-flex;min-height:50px;align-items:center;justify-content:center;padding:0 24px;border:1px solid var(--ink);font-size:14px;font-weight:800}.btn.dark{background:var(--ink);color:var(--white)}.btn.reverse{border-color:var(--white);color:var(--white)}.hero-side .row{display:flex;justify-content:space-between;gap:24px;align-items:baseline;padding:19px 0;border-bottom:1px solid var(--line)}.hero-side span{color:var(--muted);font-size:13px}.hero-side strong{font-family:"Songti SC","STSong","SimSun",serif;font-size:21px;text-align:right}
.band{padding:88px 0;border-bottom:1px solid var(--line)}.band.warm{background:var(--paper2)}.band.dark{background:var(--dark);color:var(--white);border:0}.section-intro{display:flex;gap:96px;justify-content:space-between;align-items:flex-end;margin-bottom:48px}.section-intro>div,.section-intro>h2{flex:0 0 44%}.section-intro>p:last-child{flex:1;margin:0;color:var(--muted);max-width:720px}.section-intro h2{font-size:clamp(44px,3.8vw,64px);line-height:1.1}.service-list{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid var(--line)}.service-row{min-height:255px;padding:34px 44px 30px 0;border-bottom:1px solid var(--line);display:flex;flex-direction:column;min-width:0}.service-row:nth-child(odd){border-right:1px solid var(--line)}.service-row:nth-child(even){padding-left:44px;padding-right:0}.service-mark{display:block;margin-bottom:22px;color:var(--wine);font-size:11px;font-weight:900;letter-spacing:.12em}.service-row h3{font-size:34px;line-height:1.2}.service-row p{margin:14px 0 0;color:var(--muted);font-size:17px;max-width:560px}.service-link{margin-top:auto;padding-top:26px;align-self:flex-start;border-bottom:1px solid;font-size:14px;font-weight:900}
.supply-grid{display:flex;gap:96px;justify-content:space-between;align-items:flex-start}.supply-grid>div{flex:1;min-width:0}.supply-grid h2{font-size:clamp(48px,4vw,70px);line-height:1.08}.supply-note{max-width:620px;margin:24px 0 0;color:#d7d0c6}.spec-list{border-top:1px solid rgba(255,255,255,.42)}.spec{display:flex;gap:28px;padding:24px 0;border-bottom:1px solid rgba(255,255,255,.18)}.spec span{flex:0 0 145px;color:#c5bdb2;font-size:13px}.spec strong{font-family:"Songti SC","STSong","SimSun",serif;font-size:24px;line-height:1.4}.triad{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line)}.triad a{min-height:290px;padding:34px;border-right:1px solid var(--line);display:flex;flex-direction:column}.triad a:first-child{padding-left:0}.triad a:last-child{border-right:0;padding-right:0}.triad .small{color:var(--wine);font-size:11px;font-weight:900;letter-spacing:.12em}.triad h3{margin:18px 0 16px;font-size:32px;line-height:1.22}.triad p{margin:0;color:var(--muted);font-size:16px}.triad .more{margin-top:auto;padding-top:24px;font-size:14px;font-weight:900}.knowledge-grid{display:flex;gap:96px;justify-content:space-between}.knowledge-grid>div:first-child{flex:0 0 42%}.knowledge-grid>.article-list{flex:1}.knowledge-grid h2{font-size:clamp(46px,3.9vw,66px);line-height:1.08}.article-list{border-top:2px solid var(--ink)}.article-list a{display:flex;gap:24px;padding:23px 0;border-bottom:1px solid var(--line)}.article-list span{flex:0 0 86px;color:var(--wine);font-size:11px;font-weight:900}.article-list strong{font-family:"Songti SC","STSong","SimSun",serif;font-size:25px;line-height:1.42}
.cta{padding:82px 0;background:var(--wine);color:var(--white)}.cta-grid{display:flex;justify-content:space-between;gap:90px;align-items:center}.cta-grid>div{flex:1}.cta h2{font-size:clamp(46px,4.2vw,72px);line-height:1.07}.cta p{margin:0 0 24px;color:#f0dfdf;font-size:18px;max-width:600px}.site-footer{padding:56px 0 28px;background:#e7dccb}.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:58px}.footer-title{margin-bottom:12px;font-size:14px;font-weight:900}.footer-note{margin:0;max-width:360px;color:var(--muted);font-size:14px}.footer-links a{display:block;padding:4px 0;color:#4d4942;font-size:14px}.footer-bottom{margin-top:40px;padding-top:16px;border-top:1px solid var(--line);display:flex;justify-content:space-between;color:var(--muted);font-size:12px}
.page-hero{padding:94px 0 72px;border-bottom:1px solid var(--line)}.page-hero .grid{display:flex;justify-content:space-between;gap:96px;align-items:flex-end}.page-hero .grid>div{flex:1}.page-hero h1{font-size:clamp(56px,4.7vw,82px);line-height:1.05}.page-hero .lede{margin:0;color:var(--muted);font-size:20px}.content-section{padding:72px 0;border-bottom:1px solid var(--line)}.content-grid{display:flex;gap:90px;align-items:flex-start}.content-grid>h2,.content-grid>div:first-child{flex:0 0 34%}.content-grid>.prose,.content-grid>div:last-child{flex:1;min-width:0}.content-grid h2{font-size:38px;line-height:1.18}.prose{max-width:900px}.prose p{margin:0 0 20px}.prose ul,.prose ol{padding-left:1.25em}.contact-card{max-width:900px;background:var(--white);border:1px solid var(--line);padding:42px}.contact-card .email{font-family:Georgia,serif;font-size:28px;word-break:break-word}
@media(max-width:1180px){.shell{width:min(calc(100% - 48px),var(--max))}.menu,.lang{display:none}.mobile-nav{display:block}.hero-grid,.section-intro,.supply-grid,.knowledge-grid,.cta-grid,.page-hero .grid,.content-grid{display:block}.hero-side{margin-top:48px;max-width:760px}.section-intro>p:last-child{margin-top:18px}.supply-grid>div+div,.knowledge-grid>.article-list,.cta-grid>div+div,.page-hero .grid>div+div,.content-grid>*+*{margin-top:34px}.triad{grid-template-columns:1fr}.triad a,.triad a:first-child,.triad a:last-child{min-height:auto;padding:28px 0;border-right:0;border-bottom:1px solid var(--line)}.footer-grid{grid-template-columns:1.4fr 1fr 1fr}}
@media(max-width:760px){body{font-size:17px}.shell{width:calc(100% - 32px)}.nav{height:68px}.brand-cn{font-size:24px}.brand-sub{display:none}.hero{padding:58px 0 54px}.hero h1{font-size:50px}.hero-lead{font-size:19px;margin-top:20px}.band{padding:56px 0}.section-intro{margin-bottom:28px}.section-intro h2{font-size:40px}.service-list{grid-template-columns:1fr}.service-row,.service-row:nth-child(odd),.service-row:nth-child(even){min-height:auto;padding:28px 0;border-right:0}.service-row h3{font-size:30px}.service-link{margin-top:20px;padding-top:0}.supply-grid h2{font-size:44px}.spec{display:block}.spec span{display:block;margin-bottom:5px}.spec strong{font-size:22px}.knowledge-grid h2{font-size:43px}.article-list a{display:block}.article-list span{display:block;margin-bottom:5px}.article-list strong{font-size:22px}.cta{padding:58px 0}.cta h2{font-size:44px}.footer-grid{grid-template-columns:1fr 1fr;gap:30px}.footer-grid>div:first-child{grid-column:1/-1}.footer-bottom{display:block}.page-hero{padding:58px 0 44px}.page-hero h1{font-size:46px}.content-section{padding:52px 0}.content-grid h2{font-size:32px}.contact-card{padding:26px}.contact-card .email{font-size:20px}}