/* ===== HENGYE inner pages ===== */
.page-hero{background:linear-gradient(180deg,#F7FAFF,#fff);border-bottom:1px solid var(--line);padding:54px 0}
.page-hero .crumb{font-size:13px;color:var(--muted);font-weight:600;margin-bottom:12px}
.page-hero .crumb a:hover{color:var(--blue)}
.page-hero h1{font-size:38px;font-weight:900;color:var(--navy);letter-spacing:-.02em}
.page-hero p{color:var(--muted);margin-top:12px;max-width:640px;font-size:16px}

/* filter bar */
.filters{display:flex;flex-wrap:wrap;gap:14px 12px;align-items:center;margin-bottom:30px}
.chips{display:flex;flex-wrap:wrap;gap:10px}
.chip{border:1.5px solid var(--line);background:#fff;color:var(--ink);padding:10px 20px;border-radius:22px;font-size:14px;font-weight:700;cursor:pointer;transition:.18s}
.chip:hover{border-color:var(--blue);color:var(--blue)}
.chip.on{background:var(--blue);border-color:var(--blue);color:#fff}
/* 方案 A：二级 chips 一行 + 三级下拉 */
.subbar{display:flex;flex-wrap:wrap;align-items:center;gap:10px;width:100%;padding:12px 16px;background:#F7FAFF;border:1px solid #E8EFFB;border-radius:14px}
.subbar-label{color:#A9BAD4;font-weight:800;font-size:15px;margin-left:-4px}
.subchips{display:flex;flex-wrap:wrap;gap:9px}
.l3-drop{position:relative;margin-left:auto;display:flex;align-items:center;gap:8px;padding-left:12px}
.chip.sub{padding:7px 16px;font-size:13px;border-radius:18px;background:#fff;border:1.5px solid #DCE6F7;color:#546785;cursor:pointer;transition:.16s}
.chip.sub:hover{border-color:var(--blue);color:var(--blue)}
.chip.sub.on{background:var(--blue);border-color:var(--blue);color:#fff;box-shadow:0 2px 8px rgba(20,102,255,.25)}
.l3-drop{position:relative;display:flex;align-items:center;gap:8px}
.l3-drop-tip{font-size:12.5px;color:#8496B0;font-weight:700}
.l3-drop-btn{display:inline-flex;align-items:center;gap:8px;padding:8px 16px;border:1.5px solid #DCE6F7;border-radius:18px;background:#fff;color:#546785;font-size:13px;font-weight:700;cursor:pointer;transition:.16s;min-width:130px;justify-content:space-between}
.l3-drop-btn:hover{border-color:var(--blue);color:var(--blue)}
.l3-drop-btn.on{background:var(--navy,#0A1F44);border-color:var(--navy,#0A1F44);color:#fff}
.l3-drop-btn i{font-style:normal;font-size:11px;transition:transform .2s}
.l3-drop-btn.on i{transform:rotate(180deg)}
.l3-menu{display:none;position:absolute;right:0;top:calc(100% + 8px);min-width:180px;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:0 12px 32px rgba(16,24,40,.16);padding:6px;z-index:50}
.l3-menu.open{display:block}
.l3-item{display:block;width:100%;text-align:left;padding:9px 12px;border-radius:8px;font-size:13.5px;font-weight:600;color:#42526B;background:none;border:none;cursor:pointer;transition:.14s}
.l3-item:hover{background:#F4F7FC;color:var(--blue)}
.l3-item.on{background:var(--blue);color:#fff}
@media(max-width:980px){.subbar{padding:10px 12px}.l3-drop{margin-left:0}}
.search{margin-left:auto;position:relative;min-width:260px}
.search input{width:100%;padding:12px 16px 12px 40px;border:1.5px solid var(--line);border-radius:11px;font:inherit;font-size:14.5px}
.search input:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(0,102,255,.12)}
.search::before{content:"⌕";position:absolute;left:14px;top:50%;transform:translateY(-52%);color:var(--muted);font-size:18px}

/* product grid (list page) */
.grid-products{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.pcard{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.2s;display:flex;flex-direction:column}
.pcard:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#cfe0ff}
.pcard-img{height:200px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:center;color:#93b3e8;font-weight:800;font-size:12px;letter-spacing:.08em;overflow:hidden}
.pcard-img img{width:100%;height:100%;object-fit:contain;padding:12px}
.pcard-body{padding:16px 16px 18px;display:flex;flex-direction:column;flex:1}
.pcard-cat{font-size:11.5px;font-weight:800;color:var(--blue);letter-spacing:.06em;text-transform:uppercase;margin-bottom:8px}
.pcard h3{font-size:15.5px;font-weight:800;color:var(--navy);line-height:1.35;margin-bottom:8px}
.pcard-spec{font-size:12.5px;color:var(--muted);font-weight:600;margin-bottom:14px}
.pcard-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between}
.pcard-foot .mq{font-size:12px;color:var(--muted);font-weight:700}
.pcard-foot .go{font-size:13px;font-weight:800;color:var(--blue)}
.pager{display:flex;justify-content:center;gap:8px;margin-top:44px}
.pager button{border:1.5px solid var(--line);background:#fff;width:40px;height:40px;border-radius:10px;font-weight:700;color:var(--ink);cursor:pointer}
.pager button.on{background:var(--blue);color:#fff;border-color:var(--blue)}

/* product detail */
.pd{display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:start}
.pd-gallery .pd-main{background:linear-gradient(135deg,#eef4ff,#dce8ff);border-radius:16px;aspect-ratio:1/0.9;display:flex;align-items:center;justify-content:center;color:#93b3e8;font-weight:800;letter-spacing:.1em}
.pd-thumbs{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:14px}
.pd-thumbs div{aspect-ratio:1;background:#eef4ff;border-radius:10px;border:1px solid var(--line);display:flex;align-items:center;justify-content:center;color:#b7c9e8;font-size:11px;font-weight:700}
.pd-info h1{font-size:30px;font-weight:900;color:var(--navy);line-height:1.2}
.pd-meta{margin:14px 0 20px;font-size:13.5px;color:var(--muted);font-weight:600}
.pd-quote{background:var(--bg-alt);border:1px solid var(--line);border-radius:14px;padding:22px;margin-bottom:24px}
.pd-quote .row{display:flex;justify-content:space-between;font-size:14px;padding:8px 0;border-bottom:1px dashed var(--line)}
.pd-quote .row:last-child{border:none}
.pd-quote .row b{color:var(--navy);font-weight:800}
.pd-actions{display:flex;gap:12px;flex-wrap:wrap}
.spec-table{width:100%;border-collapse:collapse;margin-top:8px}
.spec-table th,.spec-table td{text-align:left;padding:13px 16px;border-bottom:1px solid var(--line);font-size:14px}
.spec-table th{width:38%;color:var(--muted);font-weight:700;background:var(--bg-alt)}
.spec-table td{color:var(--ink);font-weight:600}
.tabs{display:flex;gap:26px;border-bottom:2px solid var(--line);margin-bottom:28px}
.tabs button{background:none;border:none;font:inherit;font-size:15px;font-weight:800;color:var(--muted);padding:0 0 14px;cursor:pointer;border-bottom:3px solid transparent;margin-bottom:-2px}
.tabs button.on{color:var(--blue);border-color:var(--blue)}
.tab-panel{display:none}
.tab-panel.on{display:block}

/* about page */
.split{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center}
.split.rev{direction:rtl}
.split.rev>*{direction:ltr}
.split-media{background:linear-gradient(135deg,#0A1F44,#123a7a);border-radius:18px;aspect-ratio:4/3;display:flex;align-items:center;justify-content:center;color:#9dc0ff;font-weight:800;letter-spacing:.1em;box-shadow:var(--shadow)}
.timeline{position:relative;padding-left:30px;border-left:2px solid var(--line)}
.tl-item{position:relative;padding-bottom:30px}
.tl-item::before{content:"";position:absolute;left:-38px;top:4px;width:14px;height:14px;border-radius:50%;background:var(--blue);border:3px solid #fff;box-shadow:0 0 0 2px var(--blue)}
.tl-item b{color:var(--blue);font-weight:900;font-size:15px}
.tl-item h3{font-size:17px;font-weight:800;color:var(--navy);margin:4px 0 4px}
.tl-item p{font-size:14px;color:var(--muted)}

/* cert page */
.cert-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:28px;display:grid;grid-template-columns:120px 1fr auto;gap:26px;align-items:center;margin-bottom:20px;transition:.2s}
.cert-card:hover{box-shadow:var(--shadow);border-color:#cfe0ff}
.cert-thumb{width:120px;height:150px;background:linear-gradient(160deg,#f7faff,#e3edff);border:1px solid var(--line);border-radius:10px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;color:var(--blue);font-weight:800}
.cert-thumb .seal{width:46px;height:46px;border-radius:50%;border:3px double var(--blue);display:flex;align-items:center;justify-content:center;font-size:11px}
.cert-card h3{font-size:19px;font-weight:900;color:var(--navy);margin-bottom:6px}
.cert-card p{font-size:14px;color:var(--muted);margin-bottom:10px}
.cert-card .cert-no{font-size:12.5px;color:#93a4c2;font-weight:700;font-family:ui-monospace,monospace}

/* video grid */
.grid-videos{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.video-card{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden}
.video-frame{aspect-ratio:16/9;background:linear-gradient(135deg,#0A1F44,#123a7a);display:flex;align-items:center;justify-content:center;position:relative}
.video-frame .play{width:64px;height:64px;border-radius:50%;background:rgba(255,255,255,.92);display:flex;align-items:center;justify-content:center;color:var(--blue);font-size:24px;padding-left:5px}
.video-card h3{font-size:16px;font-weight:800;color:var(--navy);padding:18px 20px 6px}
.video-card p{font-size:13.5px;color:var(--muted);padding:0 20px 20px}

/* responsive additions */
@media(max-width:980px){
  .grid-products{grid-template-columns:repeat(2,1fr)}
  .pd,.split{grid-template-columns:1fr;gap:32px}
  .grid-videos{grid-template-columns:1fr}
  .cert-card{grid-template-columns:1fr;text-align:center}
  .cert-thumb{margin:0 auto}
  .page-hero h1{font-size:28px}
}
@media(max-width:560px){
  .grid-products{grid-template-columns:1fr}
  .search{margin-left:0;min-width:100%}
  .split.rev{direction:ltr}
}