/* ============================================================
   DongFeng — Product Category pages
   Extends the .df-resources B2B system (df-resources.css).
   Scoped under .df-resources so it inherits the same tokens:
   --ink #0a0a0a · --paper #f6f6f4 · --display Archivo · --body Inter
   ============================================================ */
body{background:var(--paper,#f6f6f4)}

/* ---- Breadcrumb ---- */
.df-resources .crumbs{border-bottom:1px solid var(--line);background:var(--paper)}
.df-resources .crumbs-inner{display:flex;flex-wrap:wrap;align-items:center;gap:.5rem;padding-block:.9rem;
  font-family:var(--mono);font-size:.7rem;letter-spacing:.1em;text-transform:uppercase}
.df-resources .crumbs a{color:var(--muted);transition:color .3s var(--ease)}
.df-resources .crumbs a:hover{color:var(--ink)}
.df-resources .crumbs .sep{color:var(--muted-2)}
.df-resources .crumbs .cur{color:var(--ink)}

/* ---- Toolbar (legacy grid fallback) ---- */
.df-resources .toolbar{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:1rem;
  padding-block:1.5rem;border-bottom:1px solid var(--line)}
.df-resources .toolbar .count{font-family:var(--mono);font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.df-resources .toolbar .sort{display:inline-flex;align-items:center;gap:.6rem;
  font-family:var(--mono);font-size:.68rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.df-resources .toolbar select{font-family:var(--body);font-size:.9rem;padding:.55rem .8rem;
  border:1.5px solid var(--ink);background:#fff;color:var(--ink);border-radius:0;cursor:pointer}
.df-resources .toolbar select:focus{outline:2px solid var(--ink);outline-offset:2px}

/* ---- Filter chips ---- */
.df-resources .filters{display:flex;flex-wrap:wrap;gap:.55rem;margin-bottom:1.8rem}

/* ---- Sub-category cards ---- */
.df-resources .cat-card .res-thumb-ph{font-size:clamp(1.1rem,2vw,1.5rem);letter-spacing:.02em}
.df-resources .cat-card .res-tag{color:var(--muted)}
.df-resources .cat-card .res-ex{font-size:.9rem}

/* ---- Product card bits ---- */
.df-resources .res-thumb{position:relative}
.df-resources .prod-model{font-family:var(--display);font-weight:700;font-size:clamp(1.25rem,2.4vw,1.85rem);
  letter-spacing:.03em;color:var(--ink-soft);text-align:center;padding:0 .5rem;line-height:1.1}
.df-resources .prod-type{position:absolute;top:.8rem;left:.8rem;z-index:2;font-family:var(--mono);font-size:.58rem;
  letter-spacing:.14em;text-transform:uppercase;color:#fff;background:var(--ink);padding:.38rem .6rem}
.df-resources .prod-spec{font-family:var(--mono);font-size:.66rem;letter-spacing:.03em;color:var(--muted);
  line-height:1.55;margin-top:.15rem}
.df-resources .prod-card.hide{display:none}

/* ---- Legacy grid spacing ---- */
.df-resources .res-grid + .res-grid{margin-top:clamp(1.1rem,2.5vw,1.8rem)}

/* ============================================================
   Product-FIRST layout
   1) Compact header → products visible above the fold
   2) Horizontal scroll rail with prev/next arrows
   ============================================================ */

/* Compact category head — black band, white text */
.df-resources .cat-head{background:var(--ink);color:#fff;padding-block:clamp(2rem,4.5vw,3.2rem)}
.df-resources .cat-head .eyebrow{display:block;margin-bottom:.55rem;color:rgba(255,255,255,.6)}
.df-resources .cat-head h1{font-family:var(--display);font-weight:700;letter-spacing:-.01em;color:#fff;
  font-size:clamp(1.9rem,4.4vw,2.9rem);line-height:1.04;margin:0 0 .6rem}
.df-resources .cat-head .lead{max-width:64ch;font-size:clamp(.95rem,1.4vw,1.05rem);color:rgba(255,255,255,.78);
  line-height:1.6;margin:0}

/* Rail section (whole page uses a wider 1440 container) */
.df-resources .wrap{max-width:1440px}
.df-resources .rail-sec{padding-block:clamp(2.4rem,5.5vw,4rem);border-top:1px solid var(--line)}
.df-resources .rail-top{display:flex;align-items:center;justify-content:space-between;gap:1rem;margin-bottom:1.1rem}
.df-resources .rail-top .rail-title{font-family:var(--display);font-weight:700;font-size:1.15rem;
  letter-spacing:-.01em;color:var(--ink);text-decoration:none}
.df-resources .rail-top .rail-title:hover{color:#3a3a3a}
.df-resources .rail-top .rail-title .arw{font-weight:400;margin-left:.35rem;color:var(--muted)}
.df-resources .rail-top .count{font-family:var(--mono);font-size:.7rem;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.df-resources .rail-nav{display:flex;gap:.5rem;flex-shrink:0}
.df-resources .rail-btn{width:44px;height:44px;display:grid;place-items:center;border:1.5px solid var(--ink);
  background:#fff;color:var(--ink);cursor:pointer;border-radius:0;font-size:1.25rem;line-height:1;
  transition:background .2s ease,color .2s ease}
.df-resources .rail-btn:hover{background:var(--ink);color:#fff}
.df-resources .rail-btn:disabled{opacity:.22;cursor:not-allowed;background:#fff;color:var(--ink)}

/* Horizontal scroll track */
.df-resources .res-rail{display:flex;gap:1rem;overflow-x:auto;scroll-snap-type:x mandatory;scroll-behavior:smooth;
  padding:.2rem .2rem 1rem;-webkit-overflow-scrolling:touch;scrollbar-width:thin;scrollbar-color:var(--ink) var(--line)}
.df-resources .res-rail::-webkit-scrollbar{height:6px}
.df-resources .res-rail::-webkit-scrollbar-thumb{background:var(--ink)}
.df-resources .res-rail::-webkit-scrollbar-track{background:var(--line)}
.df-resources .res-rail .res-card{flex:0 0 clamp(248px,21vw,300px);scroll-snap-align:start;min-width:0;
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);text-decoration:none;color:inherit;
  transition:border-color .25s ease,transform .25s ease}
.df-resources .res-rail .res-card:hover{border-color:var(--ink);transform:translateY(-3px)}
.df-resources .res-rail .res-card.hide{display:none}
.df-resources .res-rail .res-thumb{position:relative;aspect-ratio:1/1;overflow:hidden;background:#efefec}
.df-resources .res-rail .res-thumb img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;display:block}
.df-resources .res-rail .res-thumb-ph{position:absolute;inset:0;display:grid;place-items:center;background:#efefec}

/* Mobile */
@media(max-width:620px){
  .df-resources .toolbar{flex-direction:column;align-items:flex-start;gap:.8rem}
  .df-resources .toolbar select{width:100%}
  .df-resources .filters{margin-bottom:1.4rem}
  .df-resources .res-rail .res-card{flex:0 0 78%}
  .df-resources .rail-top{flex-wrap:wrap}
  .df-resources .rail-nav{order:3}
}
@media(prefers-reduced-motion:reduce){
  .df-resources .res-card{transition:none}
}