/* ============================================================
   ALLCCT 奥尔克特 — Light Theme Stylesheet v3
   White/cream base · cyan accent from logo · airy & professional
   Multi-model spec tables · placeholder image system
   ============================================================ */
:root{
  --bg:#ffffff;
  --bg-alt:#f5f7fa;
  --bg-warm:#fafbfc;
  --surface:#ffffff;
  --border:#e8ecf0;
  --border-light:#f0f2f5;
  --text:#1a2332;
  --text-secondary:#5a6b7d;
  --text-muted:#8d9bab;
  --accent:#00AEEF;
  --accent-hover:#0095D0;
  --accent-light:#e6f7ff;
  --accent-subtle:rgba(0,174,239,.06);
  --dark:#1a2332;
  --dark-alt:#243044;
  --success:#10b981;
  --shadow-sm:0 1px 3px rgba(0,0,0,.04);
  --shadow-md:0 4px 16px rgba(0,0,0,.06);
  --shadow-lg:0 12px 40px rgba(0,0,0,.08);
  --shadow-hover:0 8px 30px rgba(0,174,239,.12);
  --radius:8px;
  --radius-lg:14px;
  --font-display:'Chakra Petch','PingFang SC','Microsoft YaHei',sans-serif;
  --font-body:-apple-system,'PingFang SC','Microsoft YaHei','Segoe UI',sans-serif;
  --font-mono:'IBM Plex Mono','SF Mono','Menlo',monospace;
  --transition:all .3s cubic-bezier(.4,0,.2,1);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font-body);color:var(--text);background:var(--bg);line-height:1.75;font-size:15px;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}
::selection{background:var(--accent);color:#fff}
.container{max-width:1200px;margin:0 auto;padding:0 32px}

/* ===== HEADER (light) ===== */
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.92);backdrop-filter:blur(16px);border-bottom:1px solid var(--border);transition:var(--transition)}
.site-header.scrolled{box-shadow:var(--shadow-md)}
.header-inner{display:flex;align-items:center;height:72px;gap:32px}
.logo img{height:30px;width:auto}
.main-nav{display:flex;gap:2px;margin-left:auto}
.main-nav a{color:var(--text-secondary);font-size:14px;font-weight:500;padding:8px 16px;border-radius:var(--radius);transition:var(--transition)}
.main-nav a:hover{color:var(--text);background:var(--bg-alt)}
.main-nav a.active{color:var(--accent);background:var(--accent-light)}
.header-actions{display:flex;align-items:center;gap:14px}
.lang-switch{display:flex;border:1px solid var(--border);border-radius:20px;overflow:hidden}
.lang-switch button{font-size:12px;font-weight:500;color:var(--text-muted);padding:5px 14px;transition:var(--transition)}
.lang-switch button.active{background:var(--accent);color:#fff}
.nav-toggle{display:none;flex-direction:column;gap:5px;padding:8px}
.nav-toggle span{width:20px;height:2px;background:var(--text);border-radius:2px;transition:var(--transition)}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ===== BUTTONS ===== */
.btn{display:inline-flex;align-items:center;gap:8px;font-weight:600;font-size:14px;padding:12px 28px;border-radius:var(--radius);transition:var(--transition);letter-spacing:.02em}
.btn .arr{transition:transform .3s}
.btn:hover .arr{transform:translateX(4px)}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 2px 8px rgba(0,174,239,.25)}
.btn-primary:hover{background:var(--accent-hover);transform:translateY(-2px);box-shadow:0 6px 20px rgba(0,174,239,.3)}
.btn-outline{border:1.5px solid var(--border);color:var(--text)}
.btn-outline:hover{border-color:var(--accent);color:var(--accent);background:var(--accent-subtle)}
.btn-sm{padding:9px 20px;font-size:13px}
.btn-white{background:#fff;color:var(--accent);box-shadow:var(--shadow-sm)}
.btn-white:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}

/* ===== HERO (light, airy) ===== */
.hero{padding:100px 0 80px;background:linear-gradient(160deg,#fff 0%,var(--bg-alt) 50%,#f0f8ff 100%);position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;top:-200px;right:-200px;width:600px;height:600px;background:radial-gradient(circle,rgba(0,174,239,.05),transparent 70%);pointer-events:none}
.hero::after{content:"";position:absolute;bottom:-100px;left:-100px;width:400px;height:400px;background:radial-gradient(circle,rgba(0,174,239,.03),transparent 70%);pointer-events:none}
.hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center;position:relative}
.hero-kicker{font-family:var(--font-mono);font-size:12px;letter-spacing:.15em;color:var(--accent);margin-bottom:20px;display:flex;align-items:center;gap:10px;font-weight:500}
.hero-kicker .dot{width:8px;height:8px;background:var(--accent);border-radius:50%;animation:pulse 2s infinite}
@keyframes pulse{0%,100%{box-shadow:0 0 0 0 rgba(0,174,239,.4)}50%{box-shadow:0 0 0 8px rgba(0,174,239,0)}}
.hero h1{font-family:var(--font-display);font-size:clamp(36px,4.5vw,56px);color:var(--text);line-height:1.15;margin-bottom:24px;font-weight:700}
.hero h1 .hl{color:var(--accent)}
.hero p{color:var(--text-secondary);font-size:16px;max-width:480px;margin-bottom:36px;line-height:1.8}
.hero-ctas{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:40px}
.hero-stats{display:flex;gap:32px}
.hero-stat{text-align:left}
.hero-stat .val{font-family:var(--font-display);font-size:28px;font-weight:700;color:var(--text)}
.hero-stat .val span{color:var(--accent)}
.hero-stat .lbl{font-size:12px;color:var(--text-muted);margin-top:2px}
.hero-visual{display:flex;align-items:center;justify-content:center}

/* ===== HERO PRINTER (inline SVG + CSS animation, no image files) =====
   Print cycle = 9s, kept in sync with CYCLE=9000 in js/main.js (HUD layer/percent/temperature) */
.pf-stage{position:relative;width:100%;max-width:520px;aspect-ratio:1/1}
.pf-stage::before{content:"";position:absolute;inset:5%;border-radius:50%;background:radial-gradient(circle at 50% 42%,rgba(0,174,239,.10),rgba(0,174,239,.03) 55%,transparent 72%);pointer-events:none}
.pf-stage::after{content:"";position:absolute;inset:1.5%;border:1.5px dashed rgba(0,174,239,.18);border-radius:50%;animation:pf-orbit 46s linear infinite;pointer-events:none}
@keyframes pf-orbit{to{transform:rotate(360deg)}}
.pf-printer{position:relative;z-index:1;width:100%;height:auto;display:block}
.pf-mono{font-family:var(--font-mono)}
.pf-disp{font-family:var(--font-display)}

/* floating spec chips */
.pf-chip{position:absolute;z-index:2;display:inline-flex;align-items:center;gap:7px;font-family:var(--font-mono);font-size:11px;font-weight:600;letter-spacing:.04em;color:var(--text);background:var(--surface);border:1px solid var(--border);border-radius:20px;padding:7px 13px;box-shadow:var(--shadow-md)}
.pf-chip i{width:6px;height:6px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 3px rgba(0,174,239,.15)}
.pf-chip-a{top:9%;left:-2%;animation:pf-chipfloat 4.6s ease-in-out infinite}
.pf-chip-b{bottom:12%;right:-3%;animation:pf-chipfloat 5.6s ease-in-out -2.4s infinite}
@keyframes pf-chipfloat{0%,100%{transform:translateY(0)}50%{transform:translateY(-9px)}}

/* --- animation layer 2: model deposits layer by layer (14 layers, 9s cycle) --- */
.pf-layer{opacity:0}
.pf-l0{animation:pf-l0 9s linear infinite}
.pf-l1{animation:pf-l1 9s linear infinite}
.pf-l2{animation:pf-l2 9s linear infinite}
.pf-l3{animation:pf-l3 9s linear infinite}
.pf-l4{animation:pf-l4 9s linear infinite}
.pf-l5{animation:pf-l5 9s linear infinite}
.pf-l6{animation:pf-l6 9s linear infinite}
.pf-l7{animation:pf-l7 9s linear infinite}
.pf-l8{animation:pf-l8 9s linear infinite}
.pf-l9{animation:pf-l9 9s linear infinite}
.pf-l10{animation:pf-l10 9s linear infinite}
.pf-l11{animation:pf-l11 9s linear infinite}
.pf-l12{animation:pf-l12 9s linear infinite}
.pf-l13{animation:pf-l13 9s linear infinite}
@keyframes pf-l0{0%{opacity:0;transform:translateY(5px)}5.5%{opacity:1;transform:translateY(0)}94%{opacity:1;transform:translateY(0)}99%,100%{opacity:0;transform:translateY(0)}}
@keyframes pf-l1{0%,6.4%{opacity:0;transform:translateY(5px)}11.9%{opacity:1;transform:translateY(0)}94%{opacity:1;transform:translateY(0)}99%,100%{opacity:0;transform:translateY(0)}}
@keyframes pf-l2{0%,12.8%{opacity:0;transform:translateY(5px)}18.3%{opacity:1;transform:translateY(0)}94%{opacity:1;transform:translateY(0)}99%,100%{opacity:0;transform:translateY(0)}}
@keyframes pf-l3{0%,19.2%{opacity:0;transform:translateY(5px)}24.7%{opacity:1;transform:translateY(0)}94%{opacity:1;transform:translateY(0)}99%,100%{opacity:0;transform:translateY(0)}}
@keyframes pf-l4{0%,25.6%{opacity:0;transform:translateY(5px)}31.1%{opacity:1;transform:translateY(0)}94%{opacity:1;transform:translateY(0)}99%,100%{opacity:0;transform:translateY(0)}}
@keyframes pf-l5{0%,32%{opacity:0;transform:translateY(5px)}37.5%{opacity:1;transform:translateY(0)}94%{opacity:1;transform:translateY(0)}99%,100%{opacity:0;transform:translateY(0)}}
@keyframes pf-l6{0%,38.4%{opacity:0;transform:translateY(5px)}43.9%{opacity:1;transform:translateY(0)}94%{opacity:1;transform:translateY(0)}99%,100%{opacity:0;transform:translateY(0)}}
@keyframes pf-l7{0%,44.8%{opacity:0;transform:translateY(5px)}50.3%{opacity:1;transform:translateY(0)}94%{opacity:1;transform:translateY(0)}99%,100%{opacity:0;transform:translateY(0)}}
@keyframes pf-l8{0%,51.2%{opacity:0;transform:translateY(5px)}56.7%{opacity:1;transform:translateY(0)}94%{opacity:1;transform:translateY(0)}99%,100%{opacity:0;transform:translateY(0)}}
@keyframes pf-l9{0%,57.6%{opacity:0;transform:translateY(5px)}63.1%{opacity:1;transform:translateY(0)}94%{opacity:1;transform:translateY(0)}99%,100%{opacity:0;transform:translateY(0)}}
@keyframes pf-l10{0%,64%{opacity:0;transform:translateY(5px)}69.5%{opacity:1;transform:translateY(0)}94%{opacity:1;transform:translateY(0)}99%,100%{opacity:0;transform:translateY(0)}}
@keyframes pf-l11{0%,70.4%{opacity:0;transform:translateY(5px)}75.9%{opacity:1;transform:translateY(0)}94%{opacity:1;transform:translateY(0)}99%,100%{opacity:0;transform:translateY(0)}}
@keyframes pf-l12{0%,76.8%{opacity:0;transform:translateY(5px)}82.3%{opacity:1;transform:translateY(0)}94%{opacity:1;transform:translateY(0)}99%,100%{opacity:0;transform:translateY(0)}}
@keyframes pf-l13{0%,83.2%{opacity:0;transform:translateY(5px)}88.7%{opacity:1;transform:translateY(0)}94%{opacity:1;transform:translateY(0)}99%,100%{opacity:0;transform:translateY(0)}}

/* gantry rises in 14 discrete steps as the model grows, then resets */
.pf-gantry{animation:pf-gantry 9s infinite}
@keyframes pf-gantry{
  0%{transform:translateY(0);animation-timing-function:steps(14,end)}
  88%{transform:translateY(-65px);animation-timing-function:ease-in-out}
  94%{transform:translateY(-65px);animation-timing-function:ease-in}
  100%{transform:translateY(0)}
}

/* --- animation layer 1: print head sweeps left <-> right --- */
.pf-head{animation:pf-head 1.5s ease-in-out infinite alternate}
@keyframes pf-head{from{transform:translateX(0)}to{transform:translateX(150px)}}

/* rotating fan + filament spool */
.pf-fan{transform-box:fill-box;transform-origin:center;animation:pf-spin .6s linear infinite}
.pf-spokes{transform-box:fill-box;transform-origin:center;animation:pf-spin 3.2s linear infinite}
@keyframes pf-spin{to{transform:rotate(360deg)}}

/* nozzle glow + extrusion sparks */
.pf-glow{transform-box:fill-box;transform-origin:center;animation:pf-glowpulse 1s ease-in-out infinite}
@keyframes pf-glowpulse{0%,100%{opacity:.5;transform:scale(1)}50%{opacity:1;transform:scale(1.35)}}
.pf-spark{--dx:-12px;--dy:9px;animation:pf-spark 1.1s ease-out infinite}
.pf-s2{--dx:11px;--dy:13px;animation-delay:.35s}
.pf-s3{--dx:-4px;--dy:15px;animation-delay:.7s}
@keyframes pf-spark{0%{opacity:0;transform:translate(0,0)}12%{opacity:1}100%{opacity:0;transform:translate(var(--dx),var(--dy))}}

/* heated-bed glow + chamber scan bar */
.pf-bedglow{animation:pf-bedglow 2.4s ease-in-out infinite}
@keyframes pf-bedglow{0%,100%{opacity:.35}50%{opacity:.7}}
.pf-scan{opacity:.5;animation:pf-scan 5s ease-in-out infinite alternate}
@keyframes pf-scan{from{transform:translateX(0)}to{transform:translateX(178px)}}

/* status LEDs blink */
.pf-blink{animation:pf-blink 1.4s ease-in-out infinite}
@keyframes pf-blink{0%,100%{opacity:1}50%{opacity:.25}}

/* --- animation layer 3: floating HUD cards --- */
.pf-hud-a{animation:pf-hudfloat 5s ease-in-out infinite}
.pf-hud-b{animation:pf-hudfloat 6s ease-in-out -2.5s infinite}
@keyframes pf-hudfloat{0%,100%{transform:translateY(0)}50%{transform:translateY(-6px)}}
.pf-lead{stroke:rgba(0,174,239,.35);stroke-width:1;stroke-dasharray:3 4;animation:pf-lead 1.6s linear infinite}
@keyframes pf-lead{to{stroke-dashoffset:-14}}
.pf-progress{transform-box:fill-box;transform-origin:left center;animation:pf-progress 9s linear infinite}
@keyframes pf-progress{0%{transform:scaleX(0)}100%{transform:scaleX(1)}}
.pf-wave{stroke:var(--accent);stroke-width:1.5;fill:none;stroke-dasharray:4 3;animation:pf-wave 1.2s linear infinite}
@keyframes pf-wave{to{stroke-dashoffset:-14}}

/* accessibility: freeze animation, show finished model */
@media (prefers-reduced-motion:reduce){
  .pf-stage *,.pf-stage::before,.pf-stage::after{animation:none!important}
  .pf-layer{opacity:1}
}

/* ===== PLACEHOLDER IMAGE ===== */
.img-slot{position:relative;background:var(--bg-alt);border:2px dashed var(--border);border-radius:var(--radius-lg);overflow:hidden;display:flex;align-items:center;justify-content:center;transition:var(--transition)}
.img-slot:hover{border-color:var(--accent)}
.img-slot img{width:100%;height:100%;object-fit:contain;padding:24px;transition:transform .5s}
.img-slot:hover img{transform:scale(1.03)}
.img-slot .slot-hint{position:absolute;bottom:8px;right:10px;font-family:var(--font-mono);font-size:9px;color:var(--text-muted);opacity:.6;pointer-events:none}
.img-slot.has-img{border:none;background:transparent}
.img-slot.has-img .slot-hint{display:none}

/* ===== STATS BAR ===== */
.stats-bar{background:var(--bg);border-bottom:1px solid var(--border);padding:0}
.stats-row{display:grid;grid-template-columns:repeat(4,1fr)}
.stats-row--3{grid-template-columns:repeat(3,1fr)}
.stat-item{padding:36px 24px;text-align:center;border-right:1px solid var(--border-light);transition:var(--transition)}
.stat-item:last-child{border-right:none}
.stat-item:hover{background:var(--accent-subtle)}
.stat-item .num{font-family:var(--font-display);font-size:36px;font-weight:700;color:var(--text)}
.stat-item .num em{font-style:normal;color:var(--accent)}
.stat-item .label{font-size:13px;color:var(--text-muted);margin-top:6px}

/* ===== SECTIONS ===== */
section{padding:88px 0}
.section-alt{background:var(--bg-alt)}
.kicker{font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;color:var(--accent);text-transform:uppercase;margin-bottom:12px;font-weight:500}
h2.section-title{font-family:var(--font-display);font-size:clamp(26px,3.2vw,38px);color:var(--text);line-height:1.2;margin-bottom:12px}
.section-desc{color:var(--text-secondary);font-size:15px;max-width:560px}
.section-head{margin-bottom:48px}
.section-head.flex{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap}

/* ===== PRODUCT CARDS ===== */
.product-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:24px}
.product-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;transition:var(--transition);display:flex;flex-direction:column}
.product-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(0,174,239,.3)}
.pc-img{aspect-ratio:4/3;background:var(--bg-alt);position:relative;overflow:hidden}
.pc-img img{width:100%;height:100%;object-fit:contain;padding:20px;transition:transform .5s}
.product-card:hover .pc-img img{transform:scale(1.05)}
.pc-badge{position:absolute;top:12px;left:12px;font-family:var(--font-mono);font-size:10px;font-weight:600;letter-spacing:.1em;background:var(--accent);color:#fff;padding:4px 10px;border-radius:20px;text-decoration:none;transition:var(--transition)}
.pc-badge:hover{opacity:.85}
.pc-body{padding:24px;display:flex;flex-direction:column;flex:1}
.pc-body h3{font-size:17px;font-weight:700;margin-bottom:4px}
.pc-body .pc-sub{font-size:12px;color:var(--text-muted);font-family:var(--font-mono);margin-bottom:12px}
.pc-cat-link{color:inherit;text-decoration:none;transition:var(--transition)}
.pc-cat-link:hover{color:var(--accent)}
.pc-body .pc-desc{font-size:13px;color:var(--text-secondary);line-height:1.7;margin-bottom:16px}
.pc-foot{display:flex;align-items:center;justify-content:space-between;padding-top:14px;border-top:1px solid var(--border-light);margin-top:auto}
.pc-price{font-family:var(--font-display);font-weight:700;color:var(--accent);font-size:15px}
.pc-links{display:flex;gap:6px}
.pc-links a{font-size:10px;font-weight:600;letter-spacing:.06em;border:1px solid var(--border);padding:4px 10px;border-radius:20px;color:var(--text-muted);transition:var(--transition)}
.pc-links a:hover{border-color:var(--accent);color:var(--accent);background:var(--accent-subtle)}

/* ===== SPEC TABLE (multi-model) ===== */
.spec-block{margin-top:56px}
.spec-block h3{font-size:20px;font-weight:700;margin-bottom:6px;display:flex;align-items:center;gap:10px}
.spec-block h3 .badge{font-family:var(--font-mono);font-size:10px;background:var(--accent-light);color:var(--accent);padding:3px 8px;border-radius:20px;font-weight:600}
.spec-block .spec-note{font-size:13px;color:var(--text-muted);margin-bottom:20px}
.spec-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:var(--radius-lg);background:var(--surface)}
table.spec{width:100%;border-collapse:collapse;font-size:13px;min-width:680px}
.spec thead{background:var(--bg-alt)}
.spec th{padding:14px 18px;text-align:left;font-weight:600;font-size:12px;color:var(--text-secondary);letter-spacing:.03em;border-bottom:1px solid var(--border);white-space:nowrap}
.spec th:first-child{color:var(--text-muted);font-family:var(--font-mono);font-size:11px;min-width:100px}
.spec td{padding:12px 18px;border-bottom:1px solid var(--border-light);color:var(--text)}
.spec tbody tr:last-child td{border-bottom:none}
.spec tbody tr:hover{background:var(--accent-subtle)}
.spec td:first-child{font-family:var(--font-mono);font-size:11px;color:var(--text-muted);font-weight:500}
.spec .model-name{font-weight:700;color:var(--text)}
.spec .price-val{color:var(--accent);font-weight:700;font-family:var(--font-display)}
.spec .col-highlight{background:rgba(0,174,239,.03)}

/* ===== FILTER TABS ===== */
.filter-bar{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:36px}
.filter-btn{font-size:13px;font-weight:500;border:1px solid var(--border);color:var(--text-secondary);padding:8px 20px;border-radius:20px;transition:var(--transition);background:var(--surface)}
.filter-btn:hover{border-color:var(--accent);color:var(--accent)}
.filter-btn.active{background:var(--accent);border-color:var(--accent);color:#fff}

/* ===== CHANNELS ===== */
.channel-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.channel-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:32px;transition:var(--transition);display:block}
.channel-card:hover{border-color:var(--accent);box-shadow:var(--shadow-hover);transform:translateY(-3px)}
.channel-card .ch-icon{font-family:var(--font-mono);font-size:11px;font-weight:600;letter-spacing:.12em;color:var(--accent);margin-bottom:10px}
.channel-card h3{font-size:18px;margin-bottom:8px}
.channel-card p{font-size:13px;color:var(--text-secondary);margin-bottom:18px}

/* ===== TECH LIST ===== */
.tech-grid{display:grid;gap:0}
.tech-row{display:grid;grid-template-columns:60px 1fr 1.6fr;gap:24px;align-items:start;padding:36px 0;border-bottom:1px solid var(--border)}
.tech-row:last-child{border-bottom:none}
.tech-row .t-num{font-family:var(--font-display);font-size:36px;font-weight:700;color:var(--border);transition:var(--transition)}
.tech-row:hover .t-num{color:var(--accent)}
.tech-row h3{font-size:18px;margin-bottom:6px}
.tech-row .t-tag{font-family:var(--font-mono);font-size:10px;letter-spacing:.12em;color:var(--accent);margin-bottom:4px;display:block}
.tech-row p{font-size:14px;color:var(--text-secondary);line-height:1.7}
.tech-row .t-metric{display:inline-block;margin-top:12px;font-family:var(--font-mono);font-size:11px;color:var(--accent);background:var(--accent-light);padding:4px 10px;border-radius:20px}

/* ===== FAQ ===== */
.faq-list{border-top:1px solid var(--border)}
.faq-item{border-bottom:1px solid var(--border)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;padding:20px 0;text-align:left;font-weight:600;font-size:15px;color:var(--text);gap:16px;transition:var(--transition)}
.faq-q:hover{color:var(--accent)}
.faq-q .icon{flex:none;width:28px;height:28px;border-radius:50%;border:1.5px solid var(--border);display:flex;align-items:center;justify-content:center;font-size:14px;color:var(--accent);transition:var(--transition)}
.faq-item.open .faq-q .icon{background:var(--accent);color:#fff;border-color:var(--accent);transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .4s ease}
.faq-a p{padding:0 0 20px;color:var(--text-secondary);font-size:14px;line-height:1.8}

/* ===== ABOUT ===== */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.about-text p{color:var(--text-secondary);margin-bottom:14px;font-size:15px;line-height:1.8}
.about-text p strong{color:var(--text)}
.values-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.value-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:28px 24px;transition:var(--transition)}
.value-card:hover{border-color:var(--accent);box-shadow:var(--shadow-hover);transform:translateY(-3px)}
.value-card .v-num{font-family:var(--font-mono);font-size:10px;letter-spacing:.15em;color:var(--accent);margin-bottom:12px}
.value-card h3{font-size:16px;margin-bottom:8px}
.value-card p{font-size:13px;color:var(--text-secondary);line-height:1.7}

/* ===== CONTACT ===== */
.contact-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:48px;align-items:start}
.info-block{margin-bottom:24px;padding-left:16px;border-left:3px solid var(--accent)}
.info-block .i-label{font-family:var(--font-mono);font-size:10px;letter-spacing:.14em;color:var(--accent);margin-bottom:4px}
.info-block .i-val{font-size:15px;font-weight:600;color:var(--text)}
.info-block .i-sub{font-size:13px;color:var(--text-secondary)}
.info-block a{color:var(--accent);font-size:13px}
.qr-box{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:10px;display:inline-block;margin-top:8px}
.qr-box img{width:120px;height:120px}
.contact-form{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:36px;box-shadow:var(--shadow-sm)}
.contact-form h3{font-size:20px;margin-bottom:6px}
.contact-form .form-desc{font-size:13px;color:var(--text-muted);margin-bottom:24px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{margin-bottom:16px}
.field label{display:block;font-size:11px;font-weight:600;letter-spacing:.08em;color:var(--text-muted);margin-bottom:6px;font-family:var(--font-mono)}
.field input,.field select,.field textarea{width:100%;font-size:14px;color:var(--text);border:1px solid var(--border);background:var(--bg-alt);padding:11px 14px;border-radius:var(--radius);outline:none;transition:var(--transition)}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(0,174,239,.1);background:#fff}
.field textarea{resize:vertical;min-height:100px}

/* ===== CTA ===== */
.cta-section{background:linear-gradient(135deg,var(--accent) 0%,#0090c8 100%);padding:72px 0;position:relative;overflow:hidden}
.cta-section::before{content:"";position:absolute;inset:0;background:url("data:image/svg+xml,%3Csvg width='60' height='60' xmlns='http://www.w3.org/2000/svg'%3E%3Ccircle cx='30' cy='30' r='1' fill='rgba(255,255,255,.1)'/%3E%3C/svg%3E");pointer-events:none}
.cta-inner{position:relative;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta-inner h2{color:#fff;font-size:clamp(24px,3vw,34px)}
.cta-inner p{color:rgba(255,255,255,.8);margin-top:6px;font-size:14px}

/* ===== PAGE HERO ===== */
.page-hero{padding:72px 0 56px;background:var(--bg-alt);border-bottom:1px solid var(--border)}
.crumbs{font-family:var(--font-mono);font-size:11px;color:var(--text-muted);margin-bottom:14px}
.crumbs em{color:var(--accent);font-style:normal}
.page-hero h1{font-family:var(--font-display);font-size:clamp(30px,3.8vw,46px);color:var(--text);margin-bottom:12px}
.page-hero h1 .hl{color:var(--accent)}
.page-hero p{color:var(--text-secondary);max-width:540px;font-size:15px}

/* ===== FOOTER ===== */
.site-footer{background:var(--bg-alt);border-top:1px solid var(--border);padding:56px 0 0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding-bottom:40px}
.footer-brand p{font-size:13px;color:var(--text-secondary);margin:14px 0 18px;max-width:260px;line-height:1.7}
.footer-brand .logo img{height:26px}
.footer-social{display:flex;gap:8px}
.footer-social a{width:32px;height:32px;border:1px solid var(--border);border-radius:50%;display:flex;align-items:center;justify-content:center;font-family:var(--font-mono);font-size:9px;color:var(--text-muted);transition:var(--transition);position:relative}
.footer-social a:hover{background:var(--accent);border-color:var(--accent);color:#fff}
.footer-social a .social-icon{width:18px;height:18px;border-radius:4px;object-fit:contain}
.footer-social a .social-icon-popup{position:absolute;bottom:42px;left:50%;transform:translateX(-50%);display:block;width:102px;background:#fff;padding:6px;border-radius:var(--radius);border:1px solid var(--border);box-shadow:var(--shadow-lg);opacity:0;visibility:hidden;transition:opacity .3s ease,transform .3s ease;pointer-events:none;z-index:20}
.footer-social a .social-icon-popup img{display:block;width:90px;height:90px;border-radius:4px}
.footer-social a:hover .social-icon-popup{opacity:1;visibility:visible;transform:translateX(-50%) translateY(-4px)}
.pc-links a .card-icon{width:16px;height:16px;border-radius:3px;object-fit:contain;vertical-align:middle}
.footer-col h4{font-size:13px;font-weight:700;color:var(--text);margin-bottom:16px;letter-spacing:.04em}
.footer-col li{margin-bottom:8px}
.footer-col a{font-size:13px;color:var(--text-secondary);transition:var(--transition)}
.footer-col a:hover{color:var(--accent)}
.footer-wechat{position:relative}
.footer-wechat-hint{cursor:pointer;transition:var(--transition)}
.footer-wechat:hover .footer-wechat-hint{color:var(--accent)}
.footer-wechat-qr{max-height:0;overflow:hidden;opacity:0;transition:max-height .4s ease,opacity .3s ease}
.footer-wechat:hover .footer-wechat-qr{max-height:200px;opacity:1}
.footer-wechat-qr img{background:#fff;padding:6px;border-radius:var(--radius);border:1px solid var(--border);width:90px;height:90px}
.footer-bottom{border-top:1px solid var(--border);padding:18px 0;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:11px;color:var(--text-muted);font-family:var(--font-mono)}
.footer-bottom a{color:var(--text-muted);transition:var(--transition)}
.footer-bottom a:hover{color:var(--accent)}

/* ===== UTILITIES ===== */
.scroll-progress{position:fixed;top:0;left:0;height:2px;background:var(--accent);width:0;z-index:200;transition:width .1s linear}
.to-top{position:fixed;right:20px;bottom:20px;width:40px;height:40px;background:var(--surface);color:var(--accent);border:1px solid var(--border);border-radius:50%;font-size:16px;z-index:150;opacity:0;pointer-events:none;transition:var(--transition);box-shadow:var(--shadow-sm)}
.to-top.show{opacity:1;pointer-events:auto}
.to-top:hover{background:var(--accent);color:#fff;border-color:var(--accent)}
.toast{position:fixed;bottom:24px;left:50%;transform:translate(-50%,50px);z-index:300;background:var(--text);color:#fff;font-size:13px;padding:12px 24px;border-radius:var(--radius);box-shadow:var(--shadow-lg);opacity:0;transition:var(--transition);pointer-events:none}
.toast.show{transform:translate(-50%,0);opacity:1}
.reveal{opacity:0;transform:translateY(24px);transition:opacity .6s ease,transform .6s ease}
.reveal.revealed{opacity:1;transform:none}
.reveal[data-delay="1"]{transition-delay:.08s}
.reveal[data-delay="2"]{transition-delay:.16s}
.reveal[data-delay="3"]{transition-delay:.24s}

/* ===== RESPONSIVE ===== */
@media(max-width:1024px){
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .about-grid,.contact-grid{grid-template-columns:1fr}
  .channel-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .values-grid{grid-template-columns:1fr}
  .tech-row{grid-template-columns:40px 1fr;gap:16px}
  .tech-row p{grid-column:2}
  .hero-stats{gap:24px}
}
@media(max-width:768px){
  .container{padding:0 20px}
  section{padding:60px 0}
  .main-nav{position:fixed;top:72px;left:0;right:0;background:#fff;flex-direction:column;padding:16px 20px;border-bottom:1px solid var(--border);transform:translateY(-120%);transition:transform .3s;z-index:90;box-shadow:var(--shadow-lg)}
  .main-nav.open{transform:translateY(0)}
  .nav-toggle{display:flex}
  .header-cta{display:none}
  .stats-row{grid-template-columns:1fr 1fr}
  .stat-item{border-bottom:1px solid var(--border-light)}
  .product-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
  .hero h1{font-size:30px}
  .hero-stats{flex-wrap:wrap;gap:20px}
}

/* ===== CATEGORY OVERVIEW ROWS (homepage) ===== */
.cat-grid{display:flex;flex-direction:column;gap:0}
.cat-row{display:grid;grid-template-columns:72px 1fr auto 32px;align-items:center;gap:20px;padding:28px 24px;border:1px solid var(--border);border-radius:var(--radius-lg);margin-bottom:12px;background:var(--surface);transition:var(--transition);text-decoration:none}
.cat-row:hover{border-color:var(--accent);box-shadow:var(--shadow-hover);transform:translateX(4px)}
.cat-badge{font-family:var(--font-mono);font-size:11px;font-weight:700;letter-spacing:.08em;background:var(--accent);color:#fff;padding:6px 0;border-radius:6px;text-align:center;line-height:1}
.cat-badge--peek{background:#f59e0b}
.cat-badge--sla{background:#8b5cf6}
.cat-badge--metal{background:#64748b}
.cat-badge--nylon{background:#e8590c}
.cat-badge--scan{background:#10b981}
.pc-badge.cat-badge--peek{background:#f59e0b}
.pc-badge.cat-badge--sla{background:#8b5cf6}
.pc-badge.cat-badge--metal{background:#64748b}
.pc-badge.cat-badge--nylon{background:#e8590c}
.pc-badge.cat-badge--scan{background:#10b981}
.cat-info h3{font-size:17px;font-weight:700;margin-bottom:4px;color:var(--text)}
.cat-info p{font-size:13px;color:var(--text-secondary);line-height:1.7;margin:0}
.cat-meta{display:flex;flex-direction:column;align-items:flex-end;gap:4px;font-family:var(--font-mono);font-size:11px;color:var(--text-muted);white-space:nowrap}
.cat-arr{font-size:18px;color:var(--accent);transition:transform .3s}
.cat-row:hover .cat-arr{transform:translateX(4px)}
@media(max-width:768px){
  .cat-row{grid-template-columns:56px 1fr 24px;gap:12px;padding:20px 16px}
  .cat-meta{display:none}
}

/* ===== PRODUCT CARD SPECS (listing page) ===== */
.pc-specs{margin:10px 0 14px;display:flex;flex-direction:column;gap:4px}
.pc-spec-row{display:flex;gap:8px;font-size:12px;line-height:1.6}
.pc-spec-label{flex:none;width:76px;color:var(--text-muted);font-family:var(--font-mono);font-size:10px;letter-spacing:.04em;padding-top:1px;white-space:nowrap}
.pc-spec-val{color:var(--text-secondary);word-break:break-all}
.pc-actions{display:flex;align-items:center;gap:8px}
.product-grid--full{grid-template-columns:repeat(auto-fill,minmax(340px,1fr))}

/* ===== PRODUCT DETAIL PAGE ===== */
.detail-layout{display:grid;grid-template-columns:380px 1fr;gap:48px;align-items:start}
.detail-visual{position:sticky;top:96px}
.detail-img-slot{width:100%;aspect-ratio:1/1;min-height:320px}
.detail-price-bar{margin-top:20px;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.detail-price{font-family:var(--font-display);font-size:28px;font-weight:700;color:var(--accent)}
.detail-buy{display:flex;gap:10px}
.detail-buy .card-icon{width:14px;height:14px;margin-right:4px;vertical-align:middle;border-radius:2px}
.detail-specs .spec-block{margin-top:0}
.detail-specs .spec{min-width:auto}
.detail-specs .spec th{font-size:11px;padding:12px 14px}
.detail-specs .spec td{font-size:12px;padding:10px 14px;line-height:1.7;vertical-align:top}
.spec--kv{width:100%;border-collapse:collapse;font-size:13px}
.spec--kv td{padding:14px 18px;border-bottom:1px solid var(--border-light);vertical-align:top}
.spec--kv td:first-child{width:30%;font-family:var(--font-mono);font-size:11px;color:var(--text-muted);font-weight:600;letter-spacing:.03em;white-space:nowrap}
.spec--kv td:last-child{color:var(--text);line-height:1.8}
.spec--kv tr.col-highlight{background:rgba(0,174,239,.02)}
.spec--kv tr:hover{background:var(--accent-subtle)}
@media(max-width:768px){
  .spec--kv td:first-child{width:auto;white-space:normal}
}

@media(max-width:1024px){
  .detail-layout{grid-template-columns:1fr;gap:32px}
  .detail-visual{position:static}
  .product-grid--full{grid-template-columns:repeat(auto-fill,minmax(300px,1fr))}
}
@media(max-width:768px){
  .product-grid--full{grid-template-columns:1fr}
  .detail-price-bar{flex-direction:column;align-items:flex-start}
}