/* ==========================================================================
   DNS 德诺森 — shared design system (index / products / applications)
   ========================================================================== */
:root{
  --bg:#f2ebdd; --bg2:#e8dcc7;
  --ink:#2a2119; --ink-dim:#8a7c69; --line:rgba(42,33,25,.15);
  --gold:#c69a4c; --camel:#c08a5a; --terra:#c8562f; --rose:#d98c7a;
  --p-orange:#ff7a1f; --p-pink:#ff2f9e; --p-yellow:#ffd21f; --p-green:#37c34c; --p-blue:#1f8cff; --p-magenta:#ff2f6e;
  --cta:#c8562f;
  --serif:'Inter','Noto Sans SC',system-ui,sans-serif;
  --sans:'Inter','Noto Sans SC',system-ui,sans-serif;
  --maxw:1280px; --ease:cubic-bezier(.16,1,.3,1);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
html,body{background:var(--bg);color:var(--ink)}
body{font-family:var(--serif);-webkit-font-smoothing:antialiased;overflow-x:hidden;}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
::selection{background:var(--terra);color:#fff}
body::-webkit-scrollbar{width:0}body{scrollbar-width:none}

#gl{position:fixed;inset:0;width:100vw;height:100vh;z-index:0;display:block}
#vignette{position:fixed;inset:0;z-index:1;pointer-events:none;background:radial-gradient(125% 100% at 50% 12%,rgba(242,235,221,0) 45%,rgba(242,235,221,.55) 100%)}

#cursor{position:fixed;top:0;left:0;z-index:901;pointer-events:none;width:10px;height:10px;border-radius:50%;background:var(--terra);transform:translate(-50%,-50%);transition:opacity .25s,transform .25s var(--ease)}
#cursor.hoveron{opacity:0}
#cursor-ring{position:fixed;top:0;left:0;z-index:900;pointer-events:none;width:46px;height:46px;border:1.5px solid var(--terra);border-radius:50%;transform:translate(-50%,-50%);transition:width .35s var(--ease),height .35s var(--ease),border-color .3s,background .3s;mix-blend-mode:multiply}
#cursor-ring.hover{width:90px;height:90px;background:rgba(200,86,47,.14)}
html.hascursor,html.hascursor *{cursor:none}
@media (hover:none){#cursor,#cursor-ring{display:none}body{cursor:auto}}

/* NAV */
header.nav{position:fixed;top:0;left:0;width:100%;z-index:500;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;padding:18px clamp(20px,5vw,64px);background:linear-gradient(180deg,rgba(242,235,221,.9),rgba(242,235,221,0));backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px)}
.nav-side{display:flex;align-items:center;gap:clamp(16px,3vw,36px);font-family:var(--sans);font-size:14px}
.nav-side.right{justify-self:end}
.nav-side a{position:relative;color:var(--ink)}
.nav-side a.active{color:var(--terra)}
.nav-side a::after{content:"";position:absolute;left:0;bottom:-4px;width:0;height:1px;background:var(--terra);transition:width .4s var(--ease)}
.nav-side a:hover::after{width:100%}
.brand{justify-self:center;display:flex;flex-direction:row;align-items:center;gap:12px}
.brand-logo{height:52px;width:auto;display:block}
.brand-word{font-family:var(--serif);font-weight:600;font-size:24px;letter-spacing:.09em;color:var(--ink)}
.lang-btn{font-family:var(--sans);border:1px solid var(--line);border-radius:999px;padding:6px 14px;font-size:12px;letter-spacing:.1em;background:transparent;color:inherit;}
.lang-select{font-family:var(--sans);border:1px solid var(--line);border-radius:999px;padding:7px 12px;font-size:12px;letter-spacing:.03em;background:transparent;color:var(--ink);-webkit-appearance:none;appearance:none}
.lang-select:hover{border-color:var(--terra)}
.lang-select:focus-visible{outline:2px solid var(--terra);outline-offset:2px}
#navmenu .lang-select{font-family:var(--serif);font-size:22px;padding:10px 18px}
.nav-burger{display:none;position:absolute;right:clamp(20px,5vw,64px);top:50%;transform:translateY(-50%);background:none;border:none;color:var(--ink);font-size:24px}
@media(max-width:900px){
  .nav-side{display:none}
  .nav-burger{display:block}
  header.nav{display:flex;justify-content:center}
}
#navmenu{position:fixed;inset:0;z-index:600;background:var(--bg);display:none;flex-direction:column;align-items:center;justify-content:center;gap:22px}
#navmenu.show{display:flex}
#navmenu a{font-family:var(--serif);font-size:30px;color:var(--ink)}
#navmenu .close{position:absolute;top:22px;right:26px;font-size:30px;font-family:var(--sans)}

/* LAYOUT */
main{position:relative;z-index:2}
section{position:relative;padding:clamp(70px,10vh,130px) clamp(20px,5vw,64px)}
.wrap{max-width:var(--maxw);margin:0 auto}
.page-hero{min-height:70vh;display:flex;flex-direction:column;justify-content:center;padding-top:150px}
.eyebrow{font-family:var(--sans);font-size:12px;letter-spacing:.34em;text-transform:uppercase;color:var(--terra);display:flex;align-items:center;gap:12px;margin-bottom:24px}
.eyebrow::before{content:"";width:30px;height:1px;background:var(--terra)}
.h-display{font-family:var(--serif);font-size:clamp(42px,8vw,104px);line-height:1.05;font-weight:500;letter-spacing:-.01em}
.h-section{font-family:var(--serif);font-size:clamp(30px,5vw,58px);line-height:1.1;font-weight:500;letter-spacing:-.01em;margin-bottom:6px}
.h-sub{font-family:var(--serif);font-size:clamp(22px,3vw,34px);font-weight:500}
.lead{font-family:var(--sans);font-size:clamp(16px,1.9vw,21px);line-height:1.6;color:var(--ink-dim);max-width:62ch}
.muted{color:var(--ink-dim)}
.grad{background:linear-gradient(90deg,var(--gold),var(--terra),var(--rose));-webkit-background-clip:text;background-clip:text;color:transparent}

.btn{font-family:var(--sans);display:inline-flex;align-items:center;gap:12px;padding:15px 28px;border-radius:999px;font-size:15px;font-weight:500;background:var(--ink);color:#f6efe2;border:none;transition:box-shadow .4s var(--ease),background .3s;will-change:transform}
.btn:hover{box-shadow:0 14px 36px rgba(42,33,25,.28)}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid rgba(42,33,25,.35)}
.btn.ghost:hover{border-color:var(--ink);background:rgba(42,33,25,.04)}

.reveal{opacity:0;transform:translateY(40px);transition:opacity .9s var(--ease),transform .9s var(--ease)}
.reveal.in{opacity:1;transform:none}
.panel{background:linear-gradient(180deg,rgba(255,252,246,.72),rgba(255,252,246,.42));border:1px solid var(--line);border-radius:22px;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}

.series-label{display:flex;align-items:baseline;gap:16px;margin:56px 0 10px;flex-wrap:wrap}
.series-label h3{font-family:var(--serif);font-size:clamp(22px,3vw,34px);font-weight:500}
.series-label p{font-family:var(--sans);color:var(--ink-dim);font-size:14px}

/* PRODUCT TABLE */
.table-wrap{overflow-x:auto;margin-top:26px;border:1px solid var(--line);border-radius:18px;background:rgba(255,252,246,.5)}
.ptable{width:100%;border-collapse:collapse;font-family:var(--sans);font-size:14px;min-width:720px}
.ptable th{text-align:left;font-weight:500;color:var(--ink-dim);font-size:11px;letter-spacing:.1em;text-transform:uppercase;padding:16px 16px;border-bottom:1px solid var(--line);white-space:nowrap}
.ptable td{padding:16px 16px;border-bottom:1px solid var(--line);color:var(--ink-dim);vertical-align:middle}
.ptable tr:last-child td{border-bottom:none}
.ptable tr:hover td{background:rgba(200,86,47,.05)}
.ptable td.name{color:var(--ink);font-weight:600;font-family:var(--serif);font-size:16px;line-height:1.2}
.ptable td.name small{display:block;font-family:var(--sans);font-size:12px;color:var(--ink-dim);font-weight:400;margin-top:2px}
.ptable .sw{width:34px;height:34px;border-radius:8px;box-shadow:0 3px 12px rgba(0,0,0,.18)}
.ptable b{color:var(--ink);font-weight:600}

.cardline{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px;margin-top:26px}
.linecard{padding:28px;border-radius:20px;border:1px solid var(--line);background:rgba(255,252,246,.6)}
.linecard .dot{width:38px;height:38px;border-radius:10px;margin-bottom:16px;box-shadow:0 4px 16px rgba(0,0,0,.15)}
.linecard h4{font-family:var(--serif);font-size:20px;font-weight:600;margin-bottom:8px}
.linecard p{font-family:var(--sans);color:var(--ink-dim);font-size:14px;line-height:1.55}

.chips{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}
.chip{font-family:var(--sans);font-size:13px;padding:8px 14px;border-radius:999px;border:1px solid var(--line);color:var(--ink);background:rgba(255,252,246,.6);transition:border-color .3s,background .3s}
.chip:hover{border-color:var(--terra);background:rgba(200,86,47,.08)}

/* 3D POWDER VESSELS (products page) */
#vessel-stage{position:relative;width:100%;height:min(56vh,440px);border-radius:24px;overflow:hidden;border:1px solid var(--line);background:radial-gradient(120% 120% at 50% 20%,#fbf6ec,#e4d8c4 90%);box-shadow:inset 0 2px 30px rgba(42,33,25,.06);margin-top:26px}
#gl-vessels{position:absolute;inset:0;width:100%;height:100%;display:block}
#vessel-veil{position:absolute;inset:0;pointer-events:none;background:radial-gradient(58% 62% at var(--fx,50%) 46%,transparent 0%,transparent 34%,rgba(240,232,218,.55) 100%);opacity:0;transition:opacity .5s}
#vessel-stage.focused #vessel-veil{opacity:1}
#vessel-card{position:absolute;z-index:3;min-width:230px;max-width:300px;padding:18px 20px;border-radius:16px;background:rgba(255,251,244,.94);border:1px solid var(--line);box-shadow:0 18px 50px rgba(42,33,25,.18);transform:translate(-50%,12px);opacity:0;transition:opacity .35s var(--ease);pointer-events:none;font-family:var(--sans);color:var(--ink)}
#vessel-card.show{opacity:1;pointer-events:auto}
#vessel-card .vc-code{font-size:11px;letter-spacing:.16em;color:var(--ink-dim)}
#vessel-card h4{font-family:var(--serif);font-size:21px;font-weight:600;margin:4px 0 2px}
#vessel-card .vc-cn{font-size:13px;color:var(--ink-dim);margin-bottom:12px}
#vessel-card .vc-row{display:flex;justify-content:space-between;font-size:12.5px;padding:6px 0;border-top:1px solid var(--line);color:var(--ink-dim)}
#vessel-card .vc-row b{color:var(--ink);font-weight:600}
#vessel-card .btn{margin-top:14px;width:100%;justify-content:center}
#vessel-hint{position:absolute;left:50%;bottom:16px;transform:translateX(-50%);font-family:var(--sans);font-size:12px;letter-spacing:.16em;color:var(--ink-dim);pointer-events:none;transition:opacity .4s}
#vessel-stage.focused #vessel-hint{opacity:0}

/* APPLICATION deep sections */
.appsec{display:grid;grid-template-columns:1fr 1fr;gap:clamp(30px,5vw,64px);align-items:center;padding:clamp(50px,8vh,110px) 0;border-top:1px solid var(--line)}
.appsec:first-of-type{border-top:none}
@media(max-width:860px){.appsec{grid-template-columns:1fr}}
.appsec .txt h3{font-family:var(--serif);font-size:clamp(30px,4.5vw,54px);font-weight:500;line-height:1.05;margin:6px 0 16px}
.appsec .txt p{font-family:var(--sans);color:var(--ink-dim);font-size:16px;line-height:1.65}
.appsec .txt .sub{font-family:var(--sans);color:var(--ink);font-size:13px;letter-spacing:.06em;margin-top:20px;font-weight:600}
.appsec .visual{aspect-ratio:4/3;border-radius:26px;position:relative;overflow:hidden;border:1px solid var(--line);box-shadow:0 24px 60px rgba(42,33,25,.1)}
.appsec .visual .tint{position:absolute;inset:0;opacity:.9}
.appsec .visual img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.appsec .visual .ph{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;color:#fff;font-family:var(--sans);text-align:center;padding:20px;text-shadow:0 1px 10px rgba(0,0,0,.35)}
.appsec .visual .ph b{font-family:var(--serif);font-size:26px;font-weight:600}
.appsec.rev .txt{order:2}

/* CTA band */
.cta-band{margin:0 clamp(20px,5vw,64px);border-radius:24px;padding:clamp(40px,7vw,80px);text-align:center;position:relative;overflow:hidden;border:1px solid var(--line)}
.cta-band .strip{position:absolute;inset:0;z-index:0;background:linear-gradient(90deg,var(--p-orange),var(--p-pink),var(--p-yellow),var(--p-green),var(--p-blue),var(--p-magenta));opacity:.45}
.cta-band .strip::after{content:"";position:absolute;inset:0;background:rgba(250,244,233,.8)}
.cta-band>*{position:relative;z-index:1}
.cta-band h2{font-family:var(--serif);font-size:clamp(28px,4.5vw,52px);font-weight:600;margin-bottom:18px}
.cta-band .btn{margin-top:8px}

/* FOOTER */
footer{padding:52px clamp(20px,5vw,64px);border-top:1px solid var(--line);display:flex;justify-content:space-between;align-items:flex-end;flex-wrap:wrap;gap:24px;color:var(--ink-dim);font-family:var(--sans);font-size:13px;position:relative;z-index:2;background:var(--bg)}
.foot-brand{display:flex;flex-direction:column;gap:10px}
.foot-brand .fb-top{display:flex;align-items:center;gap:12px}
.foot-brand .fb-logo{height:48px;width:auto}
.foot-brand .fb-name{font-family:var(--serif);font-weight:600;font-size:25px;letter-spacing:.07em;color:var(--ink)}
.foot-brand .fb-tag{font-family:var(--sans);color:var(--ink-dim);font-size:14px}
.foot-meta{text-align:right;line-height:1.7}

/* photo gallery + facility + downloads */
.gallery{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:16px;margin-top:30px}
.gallery figure{margin:0;border-radius:16px;overflow:hidden;border:1px solid var(--line);background:#fff;position:relative}
.gallery img{width:100%;aspect-ratio:3/2;object-fit:cover;display:block;transition:transform .6s var(--ease)}
.gallery figure:hover img{transform:scale(1.06)}
.gallery figcaption{position:absolute;left:0;right:0;bottom:0;padding:12px 14px;font-family:var(--sans);font-size:13px;color:#fff;background:linear-gradient(transparent,rgba(20,15,10,.72))}
.colorcard{margin-top:26px;border-radius:18px;overflow:hidden;border:1px solid var(--line);box-shadow:0 20px 50px rgba(42,33,25,.1)}
.colorcard img{width:100%;display:block}
.facility{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:44px}
@media(max-width:760px){.facility{grid-template-columns:repeat(2,1fr)}}
.facility a{border-radius:16px;overflow:hidden;border:1px solid var(--line);display:block}
.facility img{width:100%;aspect-ratio:4/3;object-fit:cover;display:block;transition:transform .7s var(--ease)}
.facility a:hover img{transform:scale(1.07)}
.dl-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
.dl{font-family:var(--sans);display:inline-flex;align-items:center;gap:9px;font-size:13px;padding:11px 18px;border-radius:999px;border:1px solid var(--line);color:var(--ink);background:rgba(255,252,246,.6);transition:border-color .3s,background .3s}
.dl:hover{border-color:var(--terra);background:rgba(200,86,47,.08)}
.dl svg{width:15px;height:15px}

/* Q&A page */
.qa-toolbar{margin-top:40px;display:flex;flex-direction:column;gap:20px}
.qa-search{position:relative;max-width:540px}
.qa-search input{width:100%;font-family:var(--sans);font-size:15px;padding:15px 18px 15px 48px;border-radius:999px;border:1px solid var(--line);background:rgba(255,252,246,.7);color:var(--ink);}
.qa-search input:focus{outline:none;border-color:var(--terra);background:#fffdf8}
.qa-search svg{position:absolute;left:18px;top:50%;transform:translateY(-50%);width:18px;height:18px;stroke:var(--ink-dim);fill:none}
.qa-tabs{display:flex;gap:10px;flex-wrap:wrap}
.qa-tab{font-family:var(--sans);font-size:14px;padding:10px 20px;border-radius:999px;border:1px solid var(--line);background:transparent;color:var(--ink);transition:background .3s,color .3s,border-color .3s}
.qa-tab.active{background:var(--ink);color:#f6efe2;border-color:var(--ink)}
.qa-list{margin-top:34px;border-top:1px solid var(--line)}
.qa-empty{font-family:var(--sans);color:var(--ink-dim);padding:44px 0;display:none}
.qa-item{border-bottom:1px solid var(--line)}
.qa-q{width:100%;text-align:left;background:none;border:none;display:flex;align-items:flex-start;justify-content:space-between;gap:24px;padding:24px 4px;font-family:var(--serif);font-size:clamp(17px,2vw,21px);font-weight:600;color:var(--ink);line-height:1.4}
.qa-q .tag{font-family:var(--sans);font-size:11px;font-weight:500;letter-spacing:.08em;color:var(--terra);text-transform:uppercase;margin-bottom:7px;display:block}
.qa-icon{flex:0 0 auto;width:24px;height:24px;position:relative;margin-top:6px}
.qa-icon::before,.qa-icon::after{content:"";position:absolute;background:var(--terra);transition:transform .35s var(--ease)}
.qa-icon::before{left:0;top:11px;width:24px;height:2px}
.qa-icon::after{left:11px;top:0;width:2px;height:24px}
.qa-item.open .qa-icon::after{transform:scaleY(0)}
.qa-a{overflow:hidden;max-height:0;transition:max-height .45s var(--ease)}
.qa-item.open .qa-a{max-height:460px}
.qa-a p{font-family:var(--sans);color:var(--ink-dim);font-size:16px;line-height:1.65;padding:0 44px 26px 4px;max-width:74ch}

/* FAQ accordion */
.faq-jump{display:flex;gap:10px;flex-wrap:wrap;margin-top:34px}
.faq-cat{margin-top:54px;scroll-margin-top:110px}
.faq-cat .cat-h{font-family:var(--serif);font-size:clamp(20px,3vw,30px);font-weight:600;padding-bottom:10px;border-bottom:2px solid var(--terra);display:inline-flex;align-items:baseline;gap:12px;margin-bottom:8px}
.faq-cat .cat-h .num{font-family:var(--sans);font-size:13px;color:var(--terra);letter-spacing:.1em}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{display:flex;justify-content:space-between;align-items:center;gap:18px;padding:22px 4px;font-family:var(--serif);font-size:clamp(16px,1.9vw,20px);font-weight:500;color:var(--ink)}
.faq-q .ic{flex:0 0 auto;width:28px;height:28px;border-radius:50%;border:1px solid var(--line);display:flex;align-items:center;justify-content:center;font-family:var(--sans);font-size:18px;transition:transform .35s var(--ease),background .3s,color .3s,border-color .3s}
.faq-item.open .faq-q .ic{background:var(--terra);color:#fff;border-color:var(--terra);transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .45s var(--ease)}
.faq-item.open .faq-a{max-height:640px}
.faq-a .inner{padding:0 4px 24px;max-width:74ch;font-family:var(--sans);color:var(--ink-dim);font-size:15px;line-height:1.7}
.faq-a .inner b{color:var(--ink);font-weight:600}

/* ===== accessibility ===== */
.skip-link{position:fixed;top:-60px;left:12px;z-index:2000;background:var(--ink);color:#fff;padding:10px 16px;border-radius:8px;font-family:var(--sans);font-size:14px;transition:top .2s}
.skip-link:focus{top:12px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
a:focus-visible,button:focus-visible,select:focus-visible,input:focus-visible,textarea:focus-visible,[tabindex]:focus-visible,.faq-q:focus-visible,.cert:focus-visible,.chip:focus-visible{outline:2px solid var(--terra);outline-offset:3px;border-radius:6px}
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.05ms!important;scroll-behavior:auto!important}
  .reveal{opacity:1!important;transform:none!important}
  #gl,#gl-vessels,#gl-apps{display:none!important}
  .cert-track{transform:none!important}
}

html:not(.cn) [data-cn]{display:none!important}
html.cn [data-en]{display:none!important}