/* ==========================================================================
   YUZHISHENG — 产品列表 / 产品详情页（product/list.html、product/detail.html）
   Reuses the existing design system: --ink / --paper / --lime / --orange,
   Manrope typography, .section-pad, .eyebrow, .product-card, .project-strip.
   ========================================================================== */

/* ---------- Inner page hero (catalog) ---------- */
.page-hero{position:relative;background:#162825;color:#fff;padding:158px 8vw 92px;overflow:hidden}
.page-hero-copy{position:relative;z-index:2;width:min(860px,74%)}
.page-hero .eyebrow{color:var(--lime);opacity:1}
.page-hero h1{font-size:clamp(40px,4.7vw,76px);line-height:.98;letter-spacing:-.07em;font-weight:700;margin:0}
.page-hero h1 em{font-style:normal;font-weight:700;letter-spacing:-.07em}
.page-hero-text{max-width:560px;font-size:14px;line-height:1.78;color:#ccd6cf;margin:26px 0 0}
.page-hero-meta{display:flex;flex-wrap:wrap;gap:46px;margin-top:46px;border-top:1px solid rgba(213,255,63,.22);padding-top:26px}
.page-hero-meta strong{display:block;font-size:30px;letter-spacing:-.06em}
.page-hero-meta span{font-size:10px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:#9fb1a7}

/* ---------- Breadcrumb ---------- */
.breadcrumb{display:flex;flex-direction:row;align-items:center;gap:9px;width:auto;height:auto;padding:0;margin:0 0 22px;border-radius:0;transform:none;font-size:10px;line-height:12px;font-weight:700;letter-spacing:1px;text-transform:uppercase;color:#93a59b}
.breadcrumb a{color:var(--lime)}
.breadcrumb a:hover{text-decoration:underline}
.breadcrumb i{font-style:normal;opacity:.5}

/* ---------- Active nav state ---------- */
#main-nav a.is-active{color:var(--lime)}

/* ---------- Catalog toolbar ---------- */
.filter-bar{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 28px}
.filter-bar button{border:1px solid var(--line);background:transparent;color:var(--ink);padding:11px 16px;font-size:11px;font-weight:800;letter-spacing:.05em;text-transform:uppercase;cursor:pointer;transition:background .22s ease,color .22s ease,border-color .22s ease}
.filter-bar button:hover{border-color:var(--ink)}
.filter-bar button.active{background:var(--ink);border-color:var(--ink);color:var(--lime)}
.filter-bar button:focus-visible{outline:2px solid var(--orange);outline-offset:2px}
.catalog-count{font-size:11px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);margin:0 0 22px}
.catalog-count b{color:var(--ink)}
.product-card.is-hidden,.product-card.is-page-hidden{display:none}

/* ---------- Comparison table ---------- */
.compare{background:#e6e5dd}
.compare-note{font-size:13px;line-height:1.7;color:var(--muted);max-width:340px;margin:0}
.compare-scroll{overflow-x:auto;border:1px solid var(--line);background:var(--paper)}
.compare-table{width:100%;border-collapse:collapse;min-width:900px}
.compare-table th,.compare-table td{text-align:left;padding:16px 20px;font-size:12.5px;border-bottom:1px solid var(--line);vertical-align:top}
.compare-table thead th{background:var(--ink);color:#e8eee9;font-size:10px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;white-space:nowrap}
.compare-table thead th:first-child{color:var(--lime)}
.compare-table thead th a{color:inherit}
.compare-table thead th a:hover{color:var(--lime)}
.compare-table tbody th{font-weight:800;font-size:13px;white-space:nowrap;letter-spacing:-.02em}
.compare-table td{color:var(--muted)}
.compare-table tbody tr:hover{background:rgba(213,255,63,.16)}
.compare-table td .hero-value{color:var(--ink);font-weight:700}

/* ---------- Detail hero ---------- */
.detail-hero{position:relative;background:#14211e;color:#fff;padding:150px 8vw 90px;overflow:hidden}
.detail-hero:before{content:"";position:absolute;inset:0;background:linear-gradient(rgba(173,202,183,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(173,202,183,.05) 1px,transparent 1px);background-size:32px 32px;mask-image:linear-gradient(180deg,#000,transparent 88%)}
.detail-layout{position:relative;z-index:2;display:grid;grid-template-columns:1.02fr .98fr;gap:6%;align-items:center}

.detail-stage{position:relative;height:460px;background:linear-gradient(140deg,#1d312d,#0e1c19);border:1px solid rgba(213,255,63,.24);overflow:hidden}
.stage-panel{position:absolute;inset:0;opacity:0;transition:opacity .4s ease;pointer-events:none}
.stage-panel.active{opacity:1;pointer-events:auto}
.stage-tag{position:absolute;left:18px;top:16px;z-index:4;font-size:10px;font-weight:700;letter-spacing:.1em;color:var(--lime)}

.stage-panel .product-art{top:50%;left:50%;filter:drop-shadow(18px 26px 22px rgba(0,0,0,.5))}
.stage-panel .crawler{transform:translate(-50%,-50%) scale(1.22)}
.stage-panel .gun{transform:translate(-50%,-50%) rotate(-15deg) scale(1.1)}
.stage-panel .extrusion{transform:translate(-50%,-50%) rotate(-12deg) scale(1.1)}
.stage-panel .roofwelder{transform:translate(-50%,-50%) rotate(-12deg) scale(1.2)}
.stage-panel .tester{transform:translate(-50%,-50%) rotate(-8deg) scale(1.15)}

/* blueprint view */
.blueprint-panel{background-image:linear-gradient(rgba(204,232,221,.14) 1px,transparent 1px),linear-gradient(90deg,rgba(204,232,221,.14) 1px,transparent 1px);background-size:26px 26px}
.bp-body{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:64%;height:44%;border:1.5px solid rgba(213,255,63,.75);border-radius:6px}
.bp-body:before{content:"";position:absolute;left:8%;right:8%;bottom:-16px;height:28px;border:1.5px dashed rgba(204,232,221,.55);border-radius:50%}
.bp-body:after{content:"";position:absolute;left:-10%;top:22%;width:17%;height:56%;background:var(--orange);clip-path:polygon(0 0,100% 30%,100% 70%,0 100%)}
.bp-label{position:absolute;left:18px;bottom:16px;font-size:9.5px;font-weight:700;letter-spacing:.09em;color:#cfe8dd}
.bp-dim{position:absolute;right:18px;top:16px;font-size:9.5px;font-weight:700;letter-spacing:.09em;color:var(--lime)}

/* control view */
.ctrl-panel{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:66%;background:#0e1f1c;border:1px solid rgba(213,255,63,.35);padding:22px;display:grid;gap:16px}
.ctrl-screen{background:#0a1714;border:1px solid rgba(213,255,63,.3);padding:15px 18px;display:flex;align-items:baseline;gap:6px}
.ctrl-screen b{font-size:42px;color:var(--lime);letter-spacing:-.05em;line-height:1}
.ctrl-screen span{font-size:13px;color:var(--lime)}
.ctrl-readout{display:flex;justify-content:space-between;align-items:center;font-size:10px;font-weight:700;letter-spacing:.08em;color:#93a89c}
.ctrl-readout b{color:#f2f7f3;font-size:13px;letter-spacing:-.02em}
.ctrl-dials{display:flex;gap:8px}
.ctrl-dials i{flex:1;height:10px;background:#1c332e;position:relative}
.ctrl-dials i:after{content:"";position:absolute;left:0;top:0;bottom:0;width:64%;background:var(--lime)}
.ctrl-dials i:nth-child(2):after{width:40%}
.ctrl-dials i:nth-child(3):after{width:82%}

.detail-thumbs{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:10px}
.detail-thumbs button{position:relative;overflow:hidden;padding:0;border:1px solid rgba(213,255,63,.22);background:#0f1f1c;cursor:pointer;aspect-ratio:620/460;opacity:.66;transition:opacity .2s ease,border-color .2s ease}
.detail-thumbs button:hover{opacity:1;border-color:rgba(213,255,63,.5)}
.detail-thumbs button.active{opacity:1;border-color:var(--lime)}
.detail-thumbs button:focus-visible{outline:2px solid var(--orange);outline-offset:2px}
.thumb-mini{position:absolute;top:0;left:0;width:620px;height:460px;transform-origin:top left;pointer-events:none;background:linear-gradient(140deg,#1d312d,#0e1c19);overflow:hidden}
.thumb-mini .stage-panel{position:absolute;inset:0;opacity:1;transform:none;transition:none}

/* ---------- Product description body (write copy + add images here) ---------- */
.product-story .story-body{max-width:none}
.story-body>p,.story-body>h3,.story-body>ul,.story-body>ol,.story-body>blockquote{max-width:820px}
.story-body>p{font-size:15px;line-height:1.85;color:#3d4744;margin:0 0 20px}
.story-body>p:last-child{margin-bottom:0}
.story-body strong{color:var(--ink);font-weight:800}
.story-body h3{font-size:20px;letter-spacing:-.04em;margin:34px 0 12px}
.story-body ul,.story-body ol{margin:0 0 22px;padding-left:22px}
.story-body li{font-size:15px;line-height:1.8;color:#3d4744;margin-bottom:8px}
.story-figure{margin:46px 0}
.story-figure img{display:block;width:100%;height:auto;border:1px solid var(--line)}
.story-figure figcaption{font-size:11px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);margin-top:12px}
.story-video{position:relative;margin:46px 0;aspect-ratio:16/9;background:linear-gradient(150deg,#1f3330,#0c1a17);border:1px solid var(--line);overflow:hidden}
.story-video iframe,.story-video video,.story-video img{position:absolute;inset:0;width:100%;height:100%;border:0;object-fit:cover}
.story-video-play{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:74px;height:74px;border-radius:50%;background:var(--lime);display:grid;place-items:center}
.story-video-play:after{content:"";border-left:20px solid var(--ink);border-top:12px solid transparent;border-bottom:12px solid transparent;margin-left:6px}
.story-video-label{position:absolute;left:20px;bottom:18px;font-size:10px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:#9fb1a7}
@media(max-width:780px){
  .story-body>p,.story-body li{font-size:14px}
  .story-figure,.story-video{margin:26px 0}
  .story-video-play{width:56px;height:56px}
  .story-video-play:after{border-left-width:15px;border-top-width:9px;border-bottom-width:9px}
}

/* ---------- Stage carousel controls ---------- */
.stage-nav{position:absolute;inset:0;z-index:5;pointer-events:none}
.stage-nav button{position:absolute;top:50%;transform:translateY(-50%);pointer-events:auto;width:40px;height:40px;border-radius:50%;border:1px solid rgba(213,255,63,.45);background:rgba(10,23,20,.55);color:#fff;font-size:17px;line-height:1;cursor:pointer;display:grid;place-items:center;transition:background .2s ease,color .2s ease,border-color .2s ease}
.stage-nav button:hover,.stage-nav button:focus-visible{background:var(--lime);color:var(--ink);border-color:var(--lime);outline:0}
.stage-prev{left:14px}
.stage-next{right:14px}
.stage-panel{transition:opacity .5s ease,transform .5s ease;transform:translateX(12px)}
.stage-panel.active{transform:translateX(0)}
@media(max-width:780px){
  .stage-nav button{width:34px;height:34px;font-size:15px}
  .stage-prev{left:8px}
  .stage-next{right:8px}
}
@media(prefers-reduced-motion:reduce){
  .stage-panel{transition:none;transform:none}
}

.detail-info .eyebrow{color:var(--lime);opacity:1;margin-bottom:18px}
.detail-info h1{font-size:clamp(40px,4.4vw,68px);line-height:.98;letter-spacing:-.07em;margin:0;font-weight:700}
.detail-lede{font-size:14px;line-height:1.78;color:#c9d3cc;max-width:480px;margin:22px 0 0}
.detail-quick{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:rgba(196,222,204,.22);border:1px solid rgba(196,222,204,.22);margin:32px 0}
.detail-quick div{background:#14211e;padding:15px 18px}
.detail-quick span{display:block;font-size:9.5px;font-weight:700;letter-spacing:.09em;text-transform:uppercase;color:#93a89c;margin-bottom:7px}
.detail-quick strong{font-size:15px;letter-spacing:-.02em;color:#f2f7f3}
.detail-actions{display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.detail-actions .button.ghost{margin-top:0;border-color:rgba(213,255,63,.5);color:#fff}
.detail-actions .button.ghost:hover{background:rgba(213,255,63,.12)}

/* ---------- Spec table ---------- */
.spec-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 6%}
.spec-row{display:grid;grid-template-columns:.92fr 1.08fr;gap:22px;align-items:baseline;padding:17px 2px;border-bottom:1px solid var(--line)}
.spec-row span{font-size:10px;font-weight:700;letter-spacing:.09em;text-transform:uppercase;color:var(--muted)}
.spec-row p{margin:0;font-size:14px;font-weight:600;letter-spacing:-.01em}

/* ---------- Features ---------- */
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:2px;background:var(--line);border:1px solid var(--line)}
.feature-grid article{background:var(--paper);padding:32px 28px 36px}
.feature-grid span{font-size:10px;font-weight:700;letter-spacing:.1em;color:var(--orange)}
.feature-grid h3{font-size:20px;letter-spacing:-.05em;margin:14px 0 10px}
.feature-grid p{font-size:13px;line-height:1.75;color:var(--muted);margin:0}

/* ---------- Detail applications ---------- */
.detail-apps{display:grid;grid-template-columns:1fr 1fr;gap:8%;align-items:start}
.app-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:26px}
.app-tags span{border:1px solid var(--line);padding:10px 15px;font-size:11px;font-weight:800;letter-spacing:.04em;text-transform:uppercase}
.app-tags span.hot{background:var(--lime);border-color:var(--lime)}

/* ---------- Related / CTA ---------- */
.related .product-grid{margin-top:0}

/* ---------- Responsive ---------- */
@media(max-width:1050px){
  .detail-layout{grid-template-columns:1fr;gap:44px}
  .detail-stage{height:400px}
}
@media(max-width:900px){
  .feature-grid{grid-template-columns:1fr}
  .detail-apps{grid-template-columns:1fr;gap:30px}
}
@media(max-width:780px){
  .page-hero{padding:124px 7vw 68px}
  .page-hero-copy{width:100%}
  .page-hero-meta{gap:28px}
  .detail-hero{padding:120px 7vw 62px}
  .detail-stage{height:310px}
  .stage-panel .crawler{transform:translate(-50%,-50%) scale(.82)}
  .stage-panel .gun{transform:translate(-50%,-50%) rotate(-15deg) scale(.78)}
  .stage-panel .extrusion{transform:translate(-50%,-50%) rotate(-12deg) scale(.78)}
  .stage-panel .roofwelder{transform:translate(-50%,-50%) rotate(-12deg) scale(.84)}
  .stage-panel .tester{transform:translate(-50%,-50%) rotate(-8deg) scale(.8)}
  .ctrl-panel{width:82%}
  .ctrl-screen b{font-size:32px}
  .spec-grid{grid-template-columns:1fr}
  .filter-bar button{padding:10px 13px;font-size:10px}
  .detail-quick{grid-template-columns:1fr 1fr}
  .detail-actions .button{width:100%}
}
@media(max-width:520px){
  .detail-quick{grid-template-columns:1fr}
}