/* HCD / Hongchenda — shared stylesheet. Pure CSS, no framework. */
:root{
  --bg:#0b0e14;
  --bg-2:#10151e;
  --bg-3:#151c28;
  --line:rgba(255,255,255,.09);
  --ink:#eef1f7;
  --muted:#9aa5b5;
  --faint:#6b7688;
  --accent:#ffb020;
  --accent-soft:rgba(255,176,32,.12);
  --teal:#35d0ba;
  --radius:14px;
  --max:1180px;
  --font-d:"Archivo",system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;
  --font-b:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--ink);font-family:var(--font-b);line-height:1.65;font-size:16px;-webkit-font-smoothing:antialiased}
img,svg{max-width:100%;height:auto;display:block}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}
h1,h2,h3{font-family:var(--font-d);line-height:1.18;letter-spacing:-.01em}
h2{font-size:clamp(1.7rem,3.4vw,2.5rem);margin-bottom:.6em}
h3{font-size:1.15rem;margin-bottom:.4em}
.lead{color:var(--muted);font-size:clamp(1rem,1.6vw,1.15rem);max-width:62ch}
.kicker{display:inline-block;font-family:var(--font-d);font-size:.78rem;font-weight:700;letter-spacing:.22em;text-transform:uppercase;color:var(--accent);margin-bottom:14px}
section{padding:88px 0}
::selection{background:var(--accent);color:#111}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(11,14,20,.86);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:12px;color:var(--ink);font-family:var(--font-d);font-weight:800;font-size:1.25rem;letter-spacing:.04em}
.brand:hover{text-decoration:none}
.brand-mark{width:38px;height:38px;flex:0 0 38px}
.brand small{display:block;font-size:.62rem;font-weight:600;letter-spacing:.14em;color:var(--muted)}
.nav-links{display:flex;gap:6px;list-style:none}
.nav-links a{color:var(--muted);font-weight:600;font-size:.95rem;padding:10px 14px;border-radius:8px}
.nav-links a:hover,.nav-links a[aria-current="page"]{color:var(--ink);background:rgba(255,255,255,.06);text-decoration:none}
.nav-cta{background:var(--accent);color:#141414!important;font-weight:700}
.nav-cta:hover{background:#ffc14d}
.nav-toggle{display:none;background:none;border:1px solid var(--line);border-radius:8px;color:var(--ink);font-size:1.3rem;padding:6px 12px;cursor:pointer}

/* ---------- hero 2.0 ---------- */
.hero{position:relative;overflow:hidden;padding:110px 0 90px;background:var(--bg)}
.hero-bg{position:absolute;inset:0;z-index:0}
.hero-bg img{width:100%;height:100%;object-fit:cover;opacity:.42}
.hero-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(11,14,20,.95) 15%,rgba(11,14,20,.78) 42%,rgba(11,14,20,.38) 72%,rgba(11,14,20,.6) 100%)}
.hero .wrap{position:relative;z-index:1}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.hero h1{font-size:clamp(2.3rem,5.2vw,3.9rem);font-weight:800;margin:.35em 0 .5em}
.hero h1 .hl{color:var(--accent)}
.hero p.lead{margin-bottom:34px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-block;font-family:var(--font-d);font-weight:700;padding:14px 28px;border-radius:10px;border:1px solid transparent;cursor:pointer;font-size:1rem}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-primary{background:var(--accent);color:#151515}
.btn-primary:hover{background:#ffc14d}
.btn-ghost{border-color:var(--line);color:var(--ink);background:rgba(255,255,255,.03)}
.hero-badges{display:flex;gap:22px;margin-top:38px;flex-wrap:wrap;list-style:none}
.hero-badges li{display:flex;align-items:center;gap:9px;color:var(--muted);font-size:.92rem;font-weight:600}
.hero-badges svg{width:20px;height:20px;stroke:var(--teal)}
.hero-visual{position:relative;min-height:440px;perspective:1100px}
/* hero product carousel: 3D tilt card + auto-rotating webp images */
.carousel-card{position:relative}
.carousel-frame{position:relative;border-radius:18px;overflow:hidden;border:1px solid var(--line);box-shadow:0 40px 90px rgba(0,0,0,.55);aspect-ratio:4/3;background:var(--bg-3);will-change:transform;transition:transform .35s ease}
.carousel-frame img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:0;transition:opacity .8s ease}
.carousel-frame img.active{opacity:1}
.carousel-dots{position:absolute;left:0;right:0;bottom:14px;display:flex;justify-content:center;gap:9px;list-style:none;z-index:2;margin:0;padding:0}
.carousel-dots button{width:11px;height:11px;border-radius:50%;border:1px solid rgba(255,255,255,.55);background:rgba(255,255,255,.28);cursor:pointer;padding:0;transition:background .25s,border-color .25s}
.carousel-dots button[aria-selected="true"]{background:var(--accent);border-color:var(--accent)}
.scroll-hint{position:absolute;left:50%;bottom:22px;transform:translateX(-50%);color:var(--faint);font-size:.8rem;letter-spacing:.2em;text-transform:uppercase;z-index:1}
.scroll-hint::after{content:"";display:block;width:1px;height:34px;margin:10px auto 0;background:linear-gradient(var(--accent),transparent);animation:hint 1.8s ease-in-out infinite}
@keyframes hint{0%,100%{transform:scaleY(.4);opacity:.4}50%{transform:scaleY(1);opacity:1}}

/* ---------- zipper-tooth brand divider ---------- */
.zipper-strip{height:12px;background:repeating-linear-gradient(90deg,var(--accent) 0 9px,#7a5a12 9px 14px);border-top:1px solid rgba(0,0,0,.45);border-bottom:1px solid rgba(0,0,0,.45)}

/* ---------- chapter scrollspy ---------- */
.scrollspy{position:fixed;right:22px;top:50%;transform:translateY(-50%);z-index:40;display:flex;flex-direction:column;gap:13px;margin:0;padding:0}
.scrollspy a{display:flex;align-items:center;gap:8px;color:var(--faint);font-family:var(--font-d);font-size:.72rem;font-weight:700}
.scrollspy a:hover{text-decoration:none;color:var(--ink)}
.scrollspy .spy-num{font-size:.68rem;letter-spacing:.06em;min-width:20px;text-align:right}
.scrollspy .spy-dot{width:10px;height:10px;border-radius:50%;border:1px solid var(--faint);background:transparent;transition:background .25s,border-color .25s,box-shadow .25s}
.scrollspy .spy-label{opacity:0;transform:translateX(6px);transition:opacity .25s,transform .25s;white-space:nowrap;max-width:0;overflow:hidden}
.scrollspy a:hover .spy-label{opacity:1;transform:none;max-width:180px}
.scrollspy a.active{color:var(--accent)}
.scrollspy a.active .spy-dot{background:var(--accent);border-color:var(--accent);box-shadow:0 0 0 4px rgba(255,176,32,.18)}
@media(max-width:1023px){.scrollspy{display:none}}

/* ---------- trust strip ---------- */
.trust{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--bg-2);padding:30px 0}
.trust ul{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;list-style:none}
.trust li{display:flex;gap:14px;align-items:flex-start}
.trust strong{display:block;font-family:var(--font-d);font-size:1.05rem}
.trust span{color:var(--muted);font-size:.9rem}
.trust svg{width:30px;height:30px;flex:0 0 30px;stroke:var(--accent)}

/* ---------- scenarios ---------- */
.scenarios{padding:0}
.scenario{min-height:100vh;display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:40px;padding:70px 0;position:relative;overflow:hidden;border-bottom:1px solid var(--line)}
.scenario:nth-child(even) .scene{order:2}
.scenario .num{font-family:var(--font-d);font-weight:800;font-size:5rem;color:transparent;-webkit-text-stroke:1px rgba(255,176,32,.4);line-height:1}
.scenario h2{font-size:clamp(1.9rem,3.6vw,2.8rem);margin:.3em 0 .5em}
.scenario p{color:var(--muted);max-width:46ch;margin-bottom:16px}
.scenario .examples{display:flex;flex-wrap:wrap;gap:10px;list-style:none;margin-top:18px}
.scenario .examples li{font-size:.85rem;font-weight:600;color:var(--ink);background:var(--accent-soft);border:1px solid rgba(255,176,32,.35);padding:7px 14px;border-radius:999px}
.scene{position:relative;min-height:380px;display:flex;align-items:center;justify-content:center;perspective:900px}
.scene svg{width:min(420px,86%);filter:drop-shadow(0 24px 44px rgba(0,0,0,.5))}
.float-a{animation:floatA 6s ease-in-out infinite}
.float-b{animation:floatA 7.5s ease-in-out infinite reverse}
@keyframes floatA{0%,100%{transform:translateY(0) rotate(-1deg)}50%{transform:translateY(-16px) rotate(1.5deg)}}
.spin{transform-origin:center;transform-box:fill-box;animation:spin 3.2s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.pulse{transform-origin:center;transform-box:fill-box;animation:pulse 2.4s ease-in-out infinite}
@keyframes pulse{0%,100%{opacity:.35;transform:scale(.92)}50%{opacity:1;transform:scale(1.06)}}
.dash{stroke-dasharray:10 8;animation:dashmove 1.6s linear infinite}
@keyframes dashmove{to{stroke-dashoffset:-36}}
.shimmer{animation:shimmer 3.4s ease-in-out infinite}
@keyframes shimmer{0%,100%{opacity:.55}50%{opacity:1}}
.wave{animation:wave 3s ease-in-out infinite;transform-origin:center;transform-box:fill-box}
@keyframes wave{0%,100%{transform:translateX(0)}50%{transform:translateX(-14px)}}

/* ---------- category grid ---------- */
.cat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:36px}
.cat-card{background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius);padding:26px 22px;transition:transform .25s,border-color .25s}
.cat-card:hover{transform:translateY(-4px);border-color:rgba(255,176,32,.5);text-decoration:none}
.cat-card svg{width:44px;height:44px;stroke:var(--accent);margin-bottom:14px}
.cat-card h3{font-size:1.02rem}
.cat-card p{color:var(--muted);font-size:.88rem}

/* ---------- process ---------- */
.process{background:var(--bg-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:36px;counter-reset:step}
.step{background:var(--bg-3);border:1px solid var(--line);border-radius:var(--radius);padding:28px 24px;position:relative}
.step::before{counter-increment:step;content:"0" counter(step);font-family:var(--font-d);font-weight:800;font-size:2.2rem;color:var(--accent);opacity:.85}
.step h3{margin:.6em 0 .4em}
.step p{color:var(--muted);font-size:.92rem}

/* ---------- stats band ---------- */
.stats{background:linear-gradient(120deg,#141a26,#0e1420);border-bottom:1px solid var(--line)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;text-align:center}
.stat b{display:block;font-family:var(--font-d);font-size:clamp(2rem,4vw,3rem);color:var(--accent);font-weight:800}
.stat span{color:var(--muted);font-size:.92rem}

/* ---------- faq ---------- */
.faq-list{max-width:820px;margin:34px auto 0}
.faq-item{border:1px solid var(--line);border-radius:12px;margin-bottom:12px;background:var(--bg-2);overflow:hidden}
.faq-q{width:100%;background:none;border:none;color:var(--ink);font-family:var(--font-d);font-weight:700;font-size:1.02rem;text-align:left;padding:20px 22px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:16px}
.faq-q .plus{color:var(--accent);font-size:1.4rem;line-height:1;flex:0 0 auto;transition:transform .25s}
.faq-item.open .faq-q .plus{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease;color:var(--muted);font-size:.95rem}
.faq-a p{padding:0 22px 22px}

/* ---------- cta / footer ---------- */
.cta-band{background:radial-gradient(800px 400px at 50% 120%,rgba(255,176,32,.16),transparent 65%),var(--bg-2);border-top:1px solid var(--line);text-align:center}
.cta-band h2{margin-bottom:.4em}
.cta-band p{color:var(--muted);margin-bottom:28px}
.site-footer{border-top:1px solid var(--line);padding:60px 0 30px;background:#080b10}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px;margin-bottom:40px}
.foot-grid h3{font-size:.85rem;letter-spacing:.14em;text-transform:uppercase;color:var(--faint);margin-bottom:14px}
.foot-grid ul{list-style:none}
.foot-grid li{margin-bottom:9px}
.foot-grid a{color:var(--muted);font-size:.93rem}
.foot-grid p{color:var(--muted);font-size:.93rem}
.foot-bottom{border-top:1px solid var(--line);padding-top:24px;display:flex;justify-content:space-between;gap:16px;color:var(--faint);font-size:.85rem;flex-wrap:wrap}
.foot-kw{flex-basis:100%;color:var(--faint);font-size:.82rem;letter-spacing:.02em}

/* ---------- products page ---------- */
.page-hero{padding:80px 0 50px;background:radial-gradient(900px 420px at 70% 0%,rgba(255,176,32,.09),transparent 60%),var(--bg)}
.page-hero h1{font-size:clamp(2rem,4.4vw,3.2rem);margin:.3em 0 .4em}
.chips{display:flex;flex-wrap:wrap;gap:10px;margin:34px 0 8px;list-style:none}
.chip{border:1px solid var(--line);background:var(--bg-2);color:var(--muted);font-weight:600;font-size:.88rem;padding:9px 18px;border-radius:999px;cursor:pointer;font-family:var(--font-b)}
.chip:hover{border-color:var(--accent);color:var(--ink)}
.chip.active{background:var(--accent);border-color:var(--accent);color:#151515}
.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;padding:26px 0 90px}
.pcard{background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:transform .25s,border-color .25s}
.pcard:hover{transform:translateY(-4px);border-color:rgba(255,176,32,.45)}
.pcard .visual{background:linear-gradient(150deg,#1a2230,#0e131c);aspect-ratio:4/3;display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden}
.pcard .visual svg{width:58%;filter:drop-shadow(0 14px 26px rgba(0,0,0,.5))}
.pcard .body{padding:20px 22px 24px}
.pcard .cat{font-size:.75rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--teal)}
.pcard h3{font-size:1.05rem;margin:.45em 0 .35em}
.pcard .spec{color:var(--muted);font-size:.88rem;margin-bottom:14px}
.pcard .moq{display:inline-block;font-size:.8rem;font-weight:700;color:var(--accent);border:1px solid rgba(255,176,32,.4);background:var(--accent-soft);padding:5px 12px;border-radius:999px}
.pcard.hide{display:none}
.empty-note{display:none;text-align:center;color:var(--muted);padding:40px 0}
.empty-note.show{display:block}

/* ---------- factory page ---------- */
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:start}
.check-list{list-style:none;margin-top:20px}
.check-list li{display:flex;gap:12px;margin-bottom:13px;color:var(--muted)}
.check-list svg{width:22px;height:22px;flex:0 0 22px;stroke:var(--teal)}
.equip{width:100%;border-collapse:collapse;margin-top:26px;font-size:.94rem}
.equip th,.equip td{text-align:left;padding:13px 16px;border-bottom:1px solid var(--line)}
.equip th{font-family:var(--font-d);font-size:.8rem;letter-spacing:.12em;text-transform:uppercase;color:var(--faint)}
.equip td{color:var(--muted)}
.equip td:first-child{color:var(--ink);font-weight:600}
.quality{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:34px}
.qcard{background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius);padding:26px 24px}
.qcard h3{color:var(--accent);font-size:1rem;margin-bottom:.5em}
.qcard p{color:var(--muted);font-size:.9rem}

/* ---------- contact page ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:44px;align-items:start;padding:20px 0 90px}
.info-card{background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius);padding:28px;margin-bottom:18px}
.info-card h3{margin-bottom:.6em}
.info-card p,.info-card a{color:var(--muted);font-size:.95rem}
.form-card{background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius);padding:32px}
.field{margin-bottom:18px}
.field label{display:block;font-weight:600;font-size:.9rem;margin-bottom:8px}
.field input,.field select,.field textarea{width:100%;background:var(--bg-3);border:1px solid var(--line);border-radius:10px;color:var(--ink);padding:13px 15px;font-size:.95rem;font-family:var(--font-b)}
.field input:focus,.field select:focus,.field textarea:focus{outline:2px solid var(--accent);border-color:var(--accent)}
.field textarea{min-height:130px;resize:vertical}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}

/* ---------- reveal on scroll ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media(max-width:1020px){
  .hero-grid{grid-template-columns:1fr}
  .hero-visual{min-height:360px}
  .cat-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .product-grid{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:1fr 1fr}
  .two-col,.contact-grid{grid-template-columns:1fr}
  .scenario{grid-template-columns:1fr;min-height:auto}
  .scenario:nth-child(even) .scene{order:0}
}
@media(max-width:680px){
  section{padding:64px 0}
  .nav-links{position:absolute;top:68px;left:0;right:0;background:var(--bg-2);flex-direction:column;padding:12px 24px 20px;border-bottom:1px solid var(--line);display:none}
  .nav-links.open{display:flex}
  .nav-toggle{display:block}
  .trust ul{grid-template-columns:1fr 1fr}
  .stats-grid{grid-template-columns:1fr 1fr;gap:28px}
  .product-grid{grid-template-columns:1fr}
  .cat-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .quality{grid-template-columns:1fr}
  .field-row{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
}
/* ---------- reduced motion ---------- */
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
  .reveal{opacity:1;transform:none}
}

/* ---------- language switcher ---------- */
.lang-switch{display:flex;align-items:center;gap:6px;list-style:none;padding:10px 14px;font-size:.9rem;font-weight:600;color:var(--muted);white-space:nowrap}
.lang-switch .globe{font-size:1rem;line-height:1}
.lang-switch a{color:var(--muted);padding:2px 4px;border-radius:6px}
.lang-switch a:hover{color:var(--ink);text-decoration:none}
.lang-switch a[aria-current="true"]{color:var(--accent);font-weight:800}
.lang-switch .sep{opacity:.35;font-size:.75rem}

/* ---------- scroll-driven product-story chapters ---------- */
.chapter{position:relative;height:230vh;padding:0;border-bottom:1px solid var(--line)}
.chapter-sticky{position:sticky;top:0;height:100vh;height:100svh;display:flex;align-items:center;overflow:hidden}
.chapter-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;width:100%}
.chapter-media{position:relative;margin:0;perspective:1100px}
.tilt{position:relative;border-radius:18px;overflow:hidden;border:1px solid var(--line);box-shadow:0 40px 90px rgba(0,0,0,.55);will-change:transform}
.tilt img{width:100%;height:auto;display:block;transform:scale(1.001)}
.js-chapters .tilt img{transition:transform 1.1s ease}
.js-chapters .chapter.phase-b .tilt img,.js-chapters .chapter.phase-c .tilt img{transform:scale(1.12)}
.chapter .num{font-family:var(--font-d);font-weight:800;font-size:5rem;color:transparent;-webkit-text-stroke:1px rgba(255,176,32,.4);line-height:1}
.chapter h2{font-size:clamp(1.9rem,3.6vw,2.9rem);margin:.3em 0 .5em}
.chapter-copy .pitch{color:var(--muted);max-width:46ch;margin-bottom:14px}
.chapter-copy .caption{color:var(--ink);font-weight:600;max-width:46ch;margin-bottom:22px;border-left:3px solid var(--accent);padding-left:14px}
.chapter-copy .chapter-cta{margin-top:4px}
/* phase c: caption + CTA (hidden until scrolled into phase-c when JS drives) */
.js-chapters .chapter .caption,.js-chapters .chapter .chapter-cta{opacity:0;visibility:hidden;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease,visibility 0s .6s}
.js-chapters .chapter.phase-c .caption,.js-chapters .chapter.phase-c .chapter-cta{opacity:1;visibility:visible;transform:none;transition:opacity .6s ease,transform .6s ease,visibility 0s}
.js-chapters .chapter.phase-c .chapter-cta{transition-delay:.22s}
/* callouts: static list by default; overlaid annotations when JS drives */
.callouts{list-style:none;margin:18px 0 0;padding:0;display:grid;gap:10px}
.callouts li{display:flex;align-items:center;gap:10px}
.callouts li i{width:10px;height:10px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px rgba(255,176,32,.2);flex:0 0 10px}
.callouts li span{font-size:.88rem;font-weight:600;color:var(--ink)}
.js-chapters .callouts{position:absolute;inset:0;margin:0;display:block;pointer-events:none}
.js-chapters .callouts li{position:absolute;opacity:0;transform:translateY(14px) scale(.96);transition:opacity .55s ease,transform .55s ease}
.js-chapters .callouts li span{white-space:nowrap;max-width:250px;white-space:normal;font-size:.84rem;background:rgba(11,14,20,.86);border:1px solid rgba(255,176,32,.45);padding:8px 14px;border-radius:10px;backdrop-filter:blur(6px)}
.js-chapters .chapter.phase-b .callouts li{opacity:1;transform:none}
.js-chapters .chapter.phase-b .callouts li.co2{transition-delay:.18s}
.js-chapters .chapter.phase-b .callouts li.co3{transition-delay:.36s}
.co1{top:7%;right:3%}
.co2{top:42%;left:1%}
.co3{bottom:9%;right:7%}
/* alternate media side for rhythm */
.chapter:nth-of-type(even) .chapter-media{order:2}
/* mobile / static fallback: clean stacked layout */
@media(max-width:767px){
  .chapter{height:auto;min-height:0;padding:56px 0}
  .chapter-sticky{position:static;height:auto;display:block;overflow:visible}
  .chapter-grid{grid-template-columns:1fr;gap:26px}
  .chapter:nth-of-type(even) .chapter-media{order:0}
  .chapter .num{font-size:3.4rem}
}

/* ---------- RTL (Arabic) overrides — scoped to [dir="rtl"] so LTR is untouched ---------- */
[dir="rtl"] body{font-family:var(--font-b)} /* system fonts render Arabic natively */
/* letter-spacing breaks Arabic letter joining — neutralize it */
[dir="rtl"] .kicker,[dir="rtl"] .brand small,[dir="rtl"] .foot-grid h3,
[dir="rtl"] .equip th,[dir="rtl"] .pcard .cat,[dir="rtl"] .scroll-hint,
[dir="rtl"] h1,[dir="rtl"] h2,[dir="rtl"] h3{letter-spacing:0}
/* mirror asymmetric accents */
[dir="rtl"] .chapter-copy .caption{border-left:none;border-right:3px solid var(--accent);padding-left:0;padding-right:14px}
[dir="rtl"] .faq-q{text-align:right}
[dir="rtl"] .equip th,[dir="rtl"] .equip td{text-align:right}
/* mirror scrollspy to the left edge under RTL */
/* (hero CSS-case fallback removed in hero 2.0) */
[dir="rtl"] .scrollspy{right:auto;left:22px}
[dir="rtl"] .scrollspy .spy-num{text-align:left}
[dir="rtl"] .scrollspy .spy-label{transform:translateX(-6px)}
/* mirror floating callout annotations */
[dir="rtl"] .co1{right:auto;left:3%}
[dir="rtl"] .co2{left:auto;right:1%}
[dir="rtl"] .co3{right:auto;left:7%}
/* form fields follow reading direction */
[dir="rtl"] input,[dir="rtl"] textarea,[dir="rtl"] select{text-align:right}
[dir="rtl"] input::placeholder,[dir="rtl"] textarea::placeholder{text-align:right}

/* ---------- all-12-applications grid (homepage) ---------- */
.app-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:36px}
.app-card{background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius);padding:26px 24px;display:flex;flex-direction:column;transition:transform .25s,border-color .25s}
.app-card:hover{transform:translateY(-4px);border-color:rgba(255,176,32,.5)}
.app-card svg{width:40px;height:40px;stroke:var(--accent);margin-bottom:14px;flex:0 0 40px}
.app-card h3{font-size:1.05rem;margin-bottom:.5em}
.app-card p{color:var(--muted);font-size:.9rem;flex:1;margin-bottom:16px}
.app-card .app-link{font-weight:700;font-size:.9rem;color:var(--accent)}
.app-card .app-link:hover{text-decoration:underline}

/* ---------- production process (factory page) ---------- */
.proc-gallery{display:grid;grid-template-columns:repeat(5,1fr);gap:14px;margin-top:32px}
.proc-fig{margin:0;background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.proc-fig img{width:100%;aspect-ratio:4/3;object-fit:cover;display:block}
.proc-fig figcaption{padding:12px 14px;font-size:.82rem;color:var(--muted);line-height:1.5}
.proc-fig figcaption strong{display:block;color:var(--ink);font-size:.86rem;margin-bottom:2px}
.timeline{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:32px;counter-reset:tstep}
.tstep{background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius);padding:24px 22px;position:relative}
.tstep::before{counter-increment:tstep;content:"0" counter(tstep);font-family:var(--font-d);font-weight:800;font-size:2rem;color:var(--teal);opacity:.9}
.tstep h3{margin:.5em 0 .4em;font-size:1.02rem}
.tstep p{color:var(--muted);font-size:.9rem}
.tstep .core-tag{display:inline-block;font-size:.72rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:#151515;background:var(--accent);border-radius:999px;padding:3px 10px;margin-left:8px;vertical-align:middle}
.craftsmen{margin-top:32px;background:var(--bg-3);border:1px solid var(--line);border-left:3px solid var(--accent);border-radius:0 var(--radius) var(--radius) 0;padding:26px 28px}
.craftsmen h3{margin-bottom:.6em}
.craftsmen p{color:var(--muted);font-size:.94rem;margin-bottom:.7em}
.craftsmen p:last-child{margin-bottom:0}
.craftsmen strong{color:var(--ink)}

/* ---------- responsive: new blocks ---------- */
@media(max-width:1020px){
  .app-grid{grid-template-columns:repeat(2,1fr)}
  .proc-gallery{grid-template-columns:repeat(3,1fr)}
  .timeline{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:680px){
  .app-grid{grid-template-columns:1fr}
  .proc-gallery{grid-template-columns:1fr 1fr}
  .timeline{grid-template-columns:1fr}
}
[dir="rtl"] .craftsmen{border-left:none;border-right:3px solid var(--accent);border-radius:var(--radius) 0 0 var(--radius)}
[dir="rtl"] .tstep .core-tag{margin-left:0;margin-right:8px}