/* =========================================================
   Deyuan Footwear — site styles
   零外部依赖：不使用 Google Fonts / 海外 CDN（国内访问会被墙或很慢）
   ========================================================= */
:root{
  --paper:#f6f3ee;
  --paper-2:#ede8e0;
  --card:#efebe4;
  --ink:#151413;
  --ink-2:#3b3835;
  --muted:#77716a;
  --line:rgba(21,20,19,.12);
  --red:#b8302b;
  --red-d:#962520;
  --white:#fff;
  --serif:"Iowan Old Style","Palatino Linotype",Palatino,"Book Antiqua",Georgia,"Songti SC","STSong","Noto Serif SC","SimSun",serif;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI","Helvetica Neue",Arial,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --mono:ui-monospace,"SF Mono",Menlo,Consolas,monospace;
  --wrap:1240px;
  --gut:clamp(16px,4vw,40px);
  --radius:2px;
  --ease:cubic-bezier(.2,.7,.2,1);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.65 var(--sans);-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{display:block;max-width:100%;height:auto}
a{color:inherit}
figure{margin:0}
button{font:inherit;color:inherit;cursor:pointer}
:focus-visible{outline:2px solid var(--red);outline-offset:3px}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 var(--gut)}
.skip{position:absolute;left:-999px;top:8px;background:var(--ink);color:#fff;padding:8px 14px;z-index:100}
.skip:focus{left:8px}

/* ---------- language toggle ---------- */
body[data-lang="en"] [data-l="zh"],body[data-lang="zh"] [data-l="en"],
body[data-lang="en"] .on-zh,body[data-lang="zh"] .on-en{display:none!important}
body[data-lang="zh"]{letter-spacing:.02em}
body[data-lang="zh"] .display,body[data-lang="zh"] .h2,body[data-lang="zh"] .quote{letter-spacing:.04em}

/* ---------- type ---------- */
.display{font-family:var(--serif);font-weight:400;font-size:clamp(2.5rem,5.4vw,4.7rem);line-height:1.02;letter-spacing:-.02em;margin:.2em 0 .35em}
.display em,.h2 em{font-style:italic;color:var(--red)}
.h2{font-family:var(--serif);font-weight:400;font-size:clamp(2rem,4vw,3.3rem);line-height:1.08;letter-spacing:-.015em;margin:.25em 0 0;max-width:16ch}
body[data-lang="zh"] .h2{max-width:none}
.eyebrow,.kicker{font:600 .74rem/1.4 var(--sans);letter-spacing:.18em;text-transform:uppercase;color:var(--muted);margin:0}
.kicker{color:var(--red)}
.kicker-light{color:#e0675f}
.lead{font-size:clamp(1.02rem,1.3vw,1.16rem);color:var(--ink-2);max-width:34em;margin:0 0 2em}
.muted{color:var(--muted);max-width:30em;margin:0}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:.6em;padding:.95em 1.6em;border:1px solid transparent;border-radius:var(--radius);font:600 .92rem/1 var(--sans);letter-spacing:.03em;text-decoration:none;transition:background .25s,color .25s,border-color .25s,transform .25s var(--ease)}
.btn:hover{transform:translateY(-2px)}
.btn-red{background:var(--red);color:#fff}
.btn-red:hover{background:var(--red-d)}
.btn-ghost{border-color:var(--ink);color:var(--ink)}
.btn-ghost:hover{background:var(--ink);color:var(--paper)}
.btn-sm{padding:.7em 1.1em;font-size:.82rem}
.btn-block{width:100%;justify-content:center}

/* ---------- header ---------- */
.site-header{position:fixed;inset:0 0 auto;z-index:50;transition:background .3s,box-shadow .3s,padding .3s;padding:18px 0}
.site-header.scrolled{background:rgba(246,243,238,.92);backdrop-filter:saturate(1.4) blur(12px);-webkit-backdrop-filter:saturate(1.4) blur(12px);box-shadow:0 1px 0 var(--line);padding:10px 0}
.header-inner{display:flex;align-items:center;gap:24px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none}
.brand-mark{font-family:"Songti SC","STSong","Noto Serif SC","SimSun",serif;font-size:1.65rem;font-weight:600;letter-spacing:.06em;line-height:1;padding:6px 8px;background:var(--ink);color:var(--paper);position:relative}
.brand-mark::after{content:"";position:absolute;right:-6px;top:0;width:4px;height:100%;background:var(--red)}
.brand-text{font:700 .95rem/1 var(--sans);letter-spacing:.26em;margin-left:6px}
.brand-text small{display:block;font-weight:500;font-size:.56rem;letter-spacing:.2em;color:var(--muted);margin-top:5px}
.nav{display:flex;gap:28px;margin-left:auto}
.nav a{font-size:.88rem;font-weight:500;text-decoration:none;position:relative;padding:4px 0}
.nav a::after{content:"";position:absolute;left:0;bottom:-2px;height:1px;width:100%;background:var(--red);transform:scaleX(0);transform-origin:left;transition:transform .3s var(--ease)}
.nav a:hover::after,.nav a.active::after{transform:scaleX(1)}
.nav-cta-m{display:none}
.header-actions{display:flex;align-items:center;gap:10px}
.lang{background:none;border:1px solid var(--line);border-radius:999px;padding:.45em .9em;font-size:.8rem;font-weight:600}
.lang:hover{border-color:var(--ink)}
.burger{display:none;background:none;border:0;width:40px;height:40px;position:relative}
.burger i{position:absolute;left:10px;right:10px;height:1.5px;background:var(--ink);transition:transform .3s var(--ease),top .3s}
.burger i:first-child{top:16px}.burger i:last-child{top:23px}
.burger[aria-expanded="true"] i:first-child{top:20px;transform:rotate(45deg)}
.burger[aria-expanded="true"] i:last-child{top:20px;transform:rotate(-45deg)}

/* ---------- hero ---------- */
.hero{padding:clamp(120px,15vh,170px) 0 0;position:relative}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(32px,5vw,80px);align-items:center}
.hero-visual{position:relative;padding:28px 0 28px 28px}
.slash{position:absolute;inset:0 18% 0 0;background:var(--red);clip-path:polygon(0 0,100% 0,62% 100%,0 100%)}
.hero-photo{position:relative;aspect-ratio:4/4.4;overflow:hidden;box-shadow:0 30px 60px -30px rgba(0,0,0,.45)}
.hero-photo img{width:100%;height:100%;object-fit:cover;transform:scale(1.04);transition:transform 1.6s var(--ease)}
.hero-visual.in .hero-photo img{transform:scale(1)}
.hero-badge{position:absolute;left:0;bottom:0;background:var(--ink);color:var(--paper);padding:18px 22px;display:flex;gap:14px;align-items:center;font-size:.8rem;line-height:1.35}
.hero-badge strong{font:400 2.2rem/1 var(--serif);color:#fff}
.stats{list-style:none;padding:0;margin:clamp(48px,7vw,90px) 0 0;display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line)}
.stats li{padding:26px 20px 30px 0;display:flex;flex-direction:column;gap:6px;border-right:1px solid var(--line);padding-left:20px}
.stats li:first-child{padding-left:0}
.stats li:last-child{border-right:0}
.stats b{font:400 clamp(1.7rem,3vw,2.6rem)/1 var(--serif)}
.stats span{font-size:.82rem;color:var(--muted)}

/* ---------- ticker ---------- */
.ticker{background:var(--ink);color:var(--paper);overflow:hidden;padding:18px 0;margin-top:clamp(20px,3vw,40px)}
.ticker-track{display:flex;width:max-content;animation:tick 38s linear infinite}
.ticker span{font:italic 400 clamp(1.3rem,2.4vw,2rem)/1 var(--serif);padding:0 28px;white-space:nowrap;display:flex;align-items:center;gap:56px}
.ticker span::after{content:"";width:8px;height:8px;background:var(--red);transform:rotate(45deg);margin-left:28px}
@keyframes tick{to{transform:translateX(-50%)}}

/* ---------- sections ---------- */
.section{padding:clamp(80px,11vw,150px) 0}
.section-head{margin-bottom:clamp(40px,5vw,70px)}
.section-head.split{display:flex;justify-content:space-between;align-items:flex-end;gap:40px;flex-wrap:wrap}

/* about */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(40px,7vw,110px)}
.quote{font:italic 400 clamp(1.7rem,3.2vw,2.7rem)/1.22 var(--serif);margin:24px 0 0;position:relative;padding-top:40px}
.quote::before{content:"";position:absolute;top:0;left:0;width:56px;height:3px;background:var(--red)}
.about-body p{color:var(--ink-2);margin:0 0 1.2em;font-size:1.03rem}
.about-photo{margin-top:36px;max-width:420px}
.about-photo img{width:100%;aspect-ratio:4/3;object-fit:cover}
.about-photo figcaption{font-size:.78rem;color:var(--muted);margin-top:10px;letter-spacing:.04em}

/* capabilities */
.caps{background:var(--paper-2)}
.cap-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.cap{background:var(--paper-2);padding:clamp(26px,3vw,40px);position:relative;transition:background .35s}
.cap:hover{background:var(--paper)}
.cap-no{font:italic 400 3rem/1 var(--serif);color:var(--red);display:block;margin-bottom:36px}
.cap h3{font:600 1.08rem/1.3 var(--sans);margin:0 0 .6em}
.cap p{margin:0;color:var(--muted);font-size:.94rem}
.cap::after{content:"";position:absolute;left:0;bottom:0;height:3px;width:0;background:var(--red);transition:width .45s var(--ease)}
.cap:hover::after{width:100%}

/* process */
.steps{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(18px,2.4vw,32px)}
.step figure{aspect-ratio:4/3;overflow:hidden;background:var(--card)}
.step img{width:100%;height:100%;object-fit:cover;filter:saturate(.85);transition:transform .8s var(--ease),filter .5s}
.step:hover img{transform:scale(1.05);filter:saturate(1)}
.step-no{display:inline-block;font:500 .75rem/1 var(--mono);color:var(--red);margin:18px 0 6px;letter-spacing:.1em}
.step h3{font:400 1.45rem/1.2 var(--serif);margin:0 0 4px}
.step p{margin:0;font-size:.88rem;color:var(--muted)}

/* sample workshop */
.sample{background:var(--ink);color:var(--paper)}
.sample .kicker{color:#e0675f}
.sample-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:clamp(40px,6vw,100px);align-items:center}
.sample-photos{display:grid;grid-template-columns:1fr 1fr;grid-template-rows:auto auto;gap:14px}
.sp{overflow:hidden}
.sp img{width:100%;height:100%;object-fit:cover}
.sp-1{grid-row:span 2}
.sp-1 img{aspect-ratio:3/4.2}
.sp-2 img,.sp-3 img{aspect-ratio:4/3.3}
.sample-copy p{color:#c9c3ba;font-size:1.03rem}
.ticks{list-style:none;padding:0;margin:28px 0 0;border-top:1px solid rgba(255,255,255,.14)}
.ticks li{padding:14px 0 14px 34px;border-bottom:1px solid rgba(255,255,255,.14);position:relative}
.ticks li::before{content:"";position:absolute;left:4px;top:50%;width:14px;height:1.5px;background:var(--red)}

/* collections */
.filters{display:flex;flex-wrap:wrap;gap:8px}
.filters button{background:none;border:1px solid var(--line);border-radius:999px;padding:.55em 1.1em;font-size:.84rem;font-weight:500;transition:all .25s}
.filters button:hover{border-color:var(--ink)}
.filters button[aria-selected="true"]{background:var(--ink);border-color:var(--ink);color:var(--paper)}
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(10px,1.4vw,18px)}
.item{background:var(--card);border:0;padding:0;position:relative;aspect-ratio:1/1;overflow:hidden;text-align:left;animation:pop .5s var(--ease) both}
.item img{width:100%;height:100%;object-fit:contain;padding:12%;mix-blend-mode:multiply;transition:transform .6s var(--ease)}
.item:hover img{transform:scale(1.07) rotate(-1.5deg)}
.item .tag{position:absolute;left:14px;bottom:12px;font:500 .7rem/1 var(--sans);letter-spacing:.14em;text-transform:uppercase;color:var(--muted);transition:color .3s}
.item:hover .tag{color:var(--red)}
.item.wide{grid-column:span 2;aspect-ratio:2/1}
.item.wide img{padding:7% 10%}
@keyframes pop{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
.note{font-size:.8rem;color:var(--muted);margin:28px 0 0}

/* markets */
.markets{background:var(--ink);color:var(--paper);position:relative;overflow:hidden}
.markets::before{content:"";position:absolute;right:0;top:0;width:34%;height:100%;background:var(--red);clip-path:polygon(55% 0,100% 0,100% 100%,85% 100%);opacity:.95}
.markets .wrap{position:relative}
.market-list{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid rgba(255,255,255,.2)}
.market-list li{padding:32px 24px 8px 0}
.coord{font:500 .72rem/1 var(--mono);letter-spacing:.08em;color:rgba(255,255,255,.55)}
.market-list h3{font:400 clamp(1.6rem,2.6vw,2.2rem)/1.1 var(--serif);margin:18px 0 10px}
.market-list p{margin:0;font-size:.92rem;color:rgba(255,255,255,.72)}

/* culture */
.culture-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:clamp(40px,6vw,90px);align-items:center}
.culture-copy p{color:var(--ink-2);font-size:1.03rem}
.mosaic{display:grid;grid-template-columns:repeat(6,1fr);grid-auto-rows:clamp(80px,9vw,120px);gap:12px}
.m{overflow:hidden}
.m img{width:100%;height:100%;object-fit:cover;transition:transform .8s var(--ease)}
.m:hover img{transform:scale(1.05)}
.m1{grid-column:1/5;grid-row:1/3}
.m2{grid-column:5/7;grid-row:1/2}
.m3{grid-column:5/7;grid-row:2/4}
.m4{grid-column:1/5;grid-row:3/4}

/* contact */
.contact{background:var(--paper-2)}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(40px,6vw,90px);align-items:start}
.info{margin:40px 0 0}
.info div{display:grid;grid-template-columns:110px 1fr;gap:16px;padding:20px 0;border-top:1px solid var(--line)}
.info dt{font:600 .72rem/1.9 var(--sans);letter-spacing:.16em;text-transform:uppercase;color:var(--muted)}
.info dd{margin:0;font-size:1.02rem}
.info dd a{text-decoration:none;border-bottom:1px solid var(--line);transition:border-color .2s}
.info dd a:hover{border-color:var(--red)}
.info small{display:block;color:var(--muted);margin-top:6px;font-size:.84rem}
.maplinks{display:flex;gap:18px;margin-top:10px;font-size:.84rem}
.form{background:var(--paper);padding:clamp(24px,3.5vw,44px);box-shadow:0 30px 60px -40px rgba(0,0,0,.35);border-top:3px solid var(--red)}
.form h3{font:400 1.8rem/1.1 var(--serif);margin:0 0 24px}
.form label{display:block;margin-bottom:16px}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.lbl{display:block;font:600 .7rem/1 var(--sans);letter-spacing:.14em;text-transform:uppercase;color:var(--muted);margin-bottom:8px}
.form input,.form select,.form textarea{width:100%;border:0;border-bottom:1px solid rgba(21,20,19,.25);background:transparent;padding:10px 0;font:1rem var(--sans);color:var(--ink);border-radius:0;transition:border-color .2s}
.form select{appearance:none;background:linear-gradient(45deg,transparent 50%,var(--ink) 50%) right 6px center/6px 6px no-repeat,linear-gradient(-45deg,transparent 50%,var(--ink) 50%) right 0 center/6px 6px no-repeat}
.form textarea{resize:vertical;min-height:96px}
.form input:focus,.form select:focus,.form textarea:focus{outline:0;border-color:var(--red)}
.form .invalid{border-color:var(--red)}
.form-hint{font-size:.8rem;color:var(--muted);margin:14px 0 0}
.form-hint.ok{color:#2c7a4b}

/* footer */
.footer{background:var(--ink);color:rgba(255,255,255,.6);padding:40px 0;font-size:.82rem}
.footer-inner{display:flex;align-items:center;gap:30px;flex-wrap:wrap}
.footer p{margin:0;flex:1}
.brand-light .brand-mark{background:var(--paper);color:var(--ink)}
.brand-light .brand-text{color:#fff}
.to-top{text-decoration:none;color:#fff}

/* lightbox */
.lightbox{border:0;padding:0;background:transparent;max-width:min(92vw,980px);width:100%;overflow:visible}
.lightbox::backdrop{background:rgba(15,14,13,.88);backdrop-filter:blur(4px)}
.lightbox img{width:100%;max-height:78vh;object-fit:contain;background:#fff;padding:5%}
.lightbox p{color:#fff;text-align:center;font-size:.85rem;letter-spacing:.14em;text-transform:uppercase;margin:14px 0 0}
.lb-close,.lb-nav{position:absolute;background:rgba(255,255,255,.12);border:0;color:#fff;width:46px;height:46px;border-radius:50%;font-size:1.6rem;line-height:1;display:grid;place-items:center;transition:background .2s}
.lb-close:hover,.lb-nav:hover{background:var(--red)}
.lb-close{top:-56px;right:0}
.lb-nav{top:calc(50% - 40px)}
.lb-prev{left:-62px}.lb-next{right:-62px}

/* reveal */
.js .reveal{opacity:0;transform:translateY(22px);transition:opacity .9s var(--ease),transform .9s var(--ease)}
.js .reveal.in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:1080px){
  .nav{gap:20px}
  .cap-grid{grid-template-columns:repeat(2,1fr)}
  .grid{grid-template-columns:repeat(3,1fr)}
  .market-list{grid-template-columns:repeat(2,1fr)}
  .markets::before{opacity:.35}
}
@media (max-width:900px){
  .burger{display:block}
  .header-actions .btn{display:none}
  .nav{position:fixed;top:0;left:0;right:0;height:100vh;height:100dvh;background:var(--paper);flex-direction:column;justify-content:center;align-items:flex-start;padding:0 32px;gap:6px;transform:translateY(-100%);visibility:hidden;transition:transform .45s var(--ease),visibility 0s .45s;z-index:-1}
  .nav.open{transform:none;visibility:visible;transition:transform .45s var(--ease)}
  .nav a{font:400 2rem/1.5 var(--serif)}
  .nav-cta-m{display:block;color:var(--red)}
  .hero-grid,.about-grid,.sample-grid,.culture-grid,.contact-grid{grid-template-columns:1fr}
  .hero-visual{max-width:560px}
  .stats{grid-template-columns:repeat(2,1fr)}
  .stats li:nth-child(2){border-right:0}
  .stats li:nth-child(3){padding-left:0}
  .stats li:nth-child(n+3){border-top:1px solid var(--line)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .lb-prev{left:6px}.lb-next{right:6px}
  .lb-nav{background:rgba(0,0,0,.45)}
}
@media (max-width:600px){
  .brand-text small{display:none}
  .steps{display:flex;overflow-x:auto;scroll-snap-type:x mandatory;scroll-padding-left:var(--gut);margin:0 calc(-1 * var(--gut));padding:0 var(--gut) 10px;gap:14px}
  .step{flex:0 0 78%;scroll-snap-align:start}
  .grid{grid-template-columns:repeat(2,1fr)}
  .item.wide{grid-column:span 2}
  .cap-grid,.market-list{grid-template-columns:1fr}
  .row2{grid-template-columns:1fr;gap:0}
  .info div{grid-template-columns:1fr;gap:4px}
  .hero-badge{padding:12px 16px}
  .hero-badge strong{font-size:1.7rem}
  .footer-inner{flex-direction:column;align-items:flex-start;gap:14px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .reveal{opacity:1;transform:none}
}