:root{
  --brand:#8f272d;
  --brand-dark:#741e24;
  --brown:#704633;
  --gold:#b58a4b;
  --ink:#26282a;
  --muted:#777;
  --paper:#fff;
  --soft:#f1f2f2;
  --line:#dedbd7;
  --shadow:0 10px 32px rgba(40,29,22,.14);
  --header-h:144px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--ink);background:#fff;font-family:"Microsoft YaHei","PingFang SC","Noto Sans SC",Arial,sans-serif;line-height:1.75;-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button,input,textarea,select{font:inherit}
button{cursor:pointer}
main{overflow:hidden}
.sr-only{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}
.container{width:min(1180px,calc(100% - 48px));margin-inline:auto}
.container-wide{width:min(1600px,calc(100% - 64px));margin-inline:auto}

/* Header dimensions and spacing are matched to the supplied desktop artwork. */
.site-header{height:var(--header-h);background:var(--brand);color:#fff;position:relative;z-index:50}
.header-inner{height:100%;width:min(1600px,calc(100% - 64px));margin:auto;display:flex;align-items:center;justify-content:space-between;gap:40px}
.brand{display:flex;align-items:center;color:#fff;min-width:190px;line-height:1;white-space:nowrap}
.brand-logo{display:block;width:170px;height:auto}
.site-nav{display:flex;gap:68px;align-items:center}
.site-nav a{font-size:18px;padding:14px 0;position:relative;opacity:.94;white-space:nowrap}
.site-nav a::after{content:"";position:absolute;left:50%;right:50%;bottom:3px;height:2px;background:#fff;transition:left .22s,right .22s}
.site-nav a:hover::after,.site-nav a.active::after{left:0;right:0}
.nav-toggle{display:none;background:none;border:0;width:42px;padding:4px}
.nav-toggle span{display:block;height:2px;background:#fff;margin:7px 0}

/* Pixel-faithful artwork panels. Static typography and composition remain raster artwork. */
.image-stage,.art-panel{position:relative;width:100%;line-height:0;background:#fff;overflow:hidden}
.image-stage>img,.art-panel>img{display:block;width:100%;height:auto}
.art-hotspot{position:absolute;z-index:4;left:var(--left);top:var(--top);width:var(--width);height:var(--height);border-radius:6px;outline:0;background:transparent;line-height:normal;border:0;padding:0;cursor:pointer}
.art-hotspot:hover{background:rgba(255,255,255,.06)}
.art-hotspot:focus-visible{box-shadow:0 0 0 4px rgba(143,39,45,.5);background:rgba(255,255,255,.08)}
.art-video{position:absolute;z-index:3;left:var(--left);top:var(--top);width:var(--width);height:var(--height);background:#111;overflow:hidden;line-height:0}
.art-video video{display:block;width:100%;height:100%;object-fit:cover;background:#111}
.art-video:focus-within{box-shadow:0 0 0 4px rgba(143,39,45,.35)}
.product-art-link{display:block;transition:filter .22s}
.product-art-link:hover{filter:brightness(1.018)}

/* Contact form is a live layer over the supplied static composition. */
.contact-consult-art{background:#eff0f0}
.contact-art-form{position:absolute;inset:0;z-index:5;line-height:normal}
.contact-art-form input,.contact-art-form textarea,.contact-art-form button{position:absolute;margin:0;border:1px solid #c9c7c3;outline:0;color:#575757;background:rgba(249,250,250,.98);font-size:clamp(9px,.82vw,17px);line-height:1.35;border-radius:clamp(2px,.28vw,6px)}
.contact-art-form input{padding:0 clamp(7px,.72vw,15px)}
.contact-art-form textarea{padding:clamp(6px,.72vw,15px);resize:none}
.contact-art-form input:focus,.contact-art-form textarea:focus{border-color:#9b6c52;box-shadow:0 0 0 3px rgba(143,39,45,.08)}
.contact-art-name{left:54.57%;top:28.42%;width:15.31%;height:4.69%}
.contact-art-phone{left:73.62%;top:28.42%;width:15.29%;height:4.69%}
.contact-art-message{left:54.76%;top:41.89%;width:34.29%;height:28.72%}
.contact-art-submit{left:54.76%;top:72.75%;width:34.29%;height:7.43%;border:0!important;background:#704633!important;color:#fff!important;font-size:clamp(10px,.9vw,19px)!important}
.contact-art-submit:hover{background:#5e3829!important}
.contact-type-hotspot.active{box-shadow:inset 0 0 0 clamp(2px,.18vw,4px) rgba(143,39,45,.22)}

/* Artwork footer. Visible text is retained as an exact crop; links remain interactive. */
.visual-footer{position:relative;line-height:0;background:var(--brand)}
.visual-footer>img{display:block;width:100%;height:auto}
.visual-footer .footer-meta{line-height:1.5}
.back-to-top{position:fixed;right:24px;bottom:28px;width:44px;height:44px;border:0;border-radius:50%;background:var(--brand);color:#fff;font-size:20px;box-shadow:var(--shadow);opacity:0;pointer-events:none;transition:opacity .25s;z-index:40}
.back-to-top.show{opacity:1;pointer-events:auto}

/* Dynamic detail pages and system messages. */
.content-section{padding:72px 0}
.section-muted{background:var(--soft)}
.section-heading{text-align:center;margin:0 auto 48px;color:var(--brand)}
.section-heading span{display:block;font-size:28px;font-weight:700}
.section-heading small{display:block;color:#8c766c;font-size:21px;letter-spacing:3px;font-weight:600}
.section-heading i{display:block;width:86px;height:3px;background:var(--brand);margin:11px auto 0}
.article-page{padding:70px 0 100px}
.breadcrumbs{font-size:14px;color:#888;display:flex;gap:9px;flex-wrap:wrap}
.breadcrumbs em{font-style:normal;color:#555}
.article-page header{text-align:center;margin:50px auto 40px;max-width:900px}
.article-page h1{font-size:38px;line-height:1.35;margin:0 0 16px}
.article-page header time{color:#999}
.article-cover{display:block;width:min(1000px,100%);margin:0 auto 45px;max-height:620px;object-fit:cover}
.article-content{max-width:900px;margin:0 auto 48px;font-size:18px;line-height:2}
.article-content p{text-indent:2em}
.button{display:inline-flex;align-items:center;justify-content:center;gap:10px;color:#fff;background:var(--brand);padding:13px 27px;border:0;border-radius:4px;font-weight:600}
.button:hover{background:var(--brand-dark)}
.empty-state{text-align:center;padding:80px}
.floating-alert{position:fixed;right:24px;top:110px;z-index:100;padding:13px 18px;border-radius:8px;color:#fff;box-shadow:var(--shadow);transition:.3s}
.floating-alert.alert-success{background:#267f55}
.floating-alert.alert-error,.alert-error{background:#fff1f1;color:#a31e25;border:1px solid #e7b6b8}
.alert{padding:12px 15px;border-radius:6px}

/* Installer remains available for reinitialisation, while V1.5 ships pre-installed. */
.install-page{min-height:100vh;display:grid;place-items:center;background:linear-gradient(135deg,#8f272d,#4f171b);padding:30px}
.install-card{width:min(560px,100%);background:#fff;padding:46px;border-radius:22px;box-shadow:0 20px 80px rgba(0,0,0,.25)}
.install-brand{display:flex;align-items:flex-end;gap:14px;color:var(--brand);font-size:16px;font-weight:700}
.install-logo{display:block;width:210px;height:auto}
.install-brand span{padding-bottom:2px;white-space:nowrap}
.install-card h1{font-size:34px}
.install-card code{display:block;word-break:break-all;background:#f4f4f4;padding:12px}
.stack-form{display:grid;gap:18px;margin-top:28px}
.stack-form label{display:grid;gap:8px;color:var(--brown)}
.stack-form input{width:100%;border:1px solid #cbc8c2;background:#fafbfb;padding:13px 15px;border-radius:6px;outline:0}
.requirements-list{display:grid;grid-template-columns:1fr 1fr;gap:9px;margin:22px 0}
.requirement{padding:9px 11px;border-radius:7px;font-size:14px}
.requirement span{display:inline-grid;place-items:center;width:22px;height:22px;border-radius:50%;margin-right:7px;color:#fff}
.requirement.ok{background:#eff8f3;color:#286847}.requirement.ok span{background:#2d8b60}
.requirement.bad{background:#fff0f1;color:#9f2229}.requirement.bad span{background:#bb3038}

@media(max-width:1200px){
  :root{--header-h:110px}
  .site-nav{gap:34px}
  .site-nav a{font-size:16px}
  .brand-logo{width:158px}
}
@media(max-width:860px){
  :root{--header-h:78px}
  .header-inner{width:calc(100% - 32px)}
  .brand{min-width:0}.brand-logo{width:145px}
  .nav-toggle{display:block}
  .site-nav{position:absolute;top:100%;left:0;right:0;background:var(--brand);display:grid;gap:0;padding:12px 24px 24px;transform-origin:top;transform:scaleY(0);opacity:0;pointer-events:none;transition:.22s;box-shadow:0 16px 24px rgba(0,0,0,.15)}
  .site-nav.open{transform:scaleY(1);opacity:1;pointer-events:auto}
  .site-nav a{padding:12px;border-bottom:1px solid rgba(255,255,255,.15)}
  .container,.container-wide{width:calc(100% - 32px)}
  .content-section{padding:50px 0}
}
@media(max-width:560px){
  .article-page h1{font-size:28px}.article-content{font-size:16px}
  .install-card{padding:30px 22px}.install-brand{align-items:flex-start;flex-direction:column;gap:7px}.install-logo{width:185px}.requirements-list{grid-template-columns:1fr}
  .back-to-top{right:14px;bottom:16px}
  .contact-art-form input,.contact-art-form textarea{border-width:.5px}
}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}