/* ============================================================
   擎略官网 V3 增量层（在 style.css 之后引入）
   A 导航子菜单(移动端) B 产品页 C 首页深空hero D 研究页 E 关于页
   ============================================================ */

/* ---------- A · 导航子菜单：移动端 accordion ---------- */
@media (max-width:680px){
  .main-nav .nav-item{display:block}
  .main-nav .nav-row{display:flex;align-items:center;justify-content:space-between;gap:8px}
  .main-nav .nav-link{flex:1;padding:12px 2px;font-size:16px}
  .nav-caret{
    pointer-events:auto;flex:none;width:34px;height:34px;margin-right:-6px;
    border-radius:8px;cursor:pointer;
    transition:background-color var(--dur-base) linear,transform var(--dur-sub) var(--ease-brand),color var(--dur-base) linear;
  }
  .nav-caret:hover{background:var(--warm)}
  .nav-item:hover .nav-caret{transform:none}
  .nav-check:checked ~ .nav-row .nav-caret{transform:rotate(180deg);color:var(--orange)}
  .nav-panel{
    position:static;min-width:0;padding:2px 0 10px;
    background:transparent;border:0;border-radius:0;box-shadow:none;
    opacity:1;visibility:visible;transform:none;display:none;
  }
  .nav-panel::before{display:none}
  .nav-check:checked ~ .nav-panel{display:block;animation:sheetIn var(--dur-sub) var(--ease-brand)}
  .nav-sub{padding:10px 12px 10px 14px}
}

/* ---------- C · 首页深空 Hero ---------- */
.hero.hero-dark{
  background:
    radial-gradient(900px 420px at 82% -10%,rgba(242,101,34,.20),transparent 60%),
    radial-gradient(620px 380px at 6% 104%,rgba(201,160,106,.12),transparent 62%),
    linear-gradient(180deg,#10131A 0%,#12161f 58%,#0c0f16 100%);
  color:#fff;padding:112px 0 96px;
}
.hero.hero-dark::before{
  background-image:
    repeating-linear-gradient(90deg,rgba(255,255,255,.05) 0 1px,transparent 1px 26px),
    repeating-linear-gradient(0deg,rgba(255,255,255,.05) 0 1px,transparent 1px 26px);
  -webkit-mask-image:radial-gradient(900px 480px at 30% 36%,#000 6%,transparent 74%);
  mask-image:radial-gradient(900px 480px at 30% 36%,#000 6%,transparent 74%);
}
.hero.hero-dark::after{display:none}
.hero.hero-dark .hero-tag{
  color:#ffb689;background:rgba(242,101,34,.12);border-color:rgba(242,101,34,.5);
  box-shadow:0 8px 22px -14px rgba(242,101,34,.8);
}
.hero.hero-dark h1{color:#fff}
.hero.hero-dark h1 .hl{color:var(--orange)}
.hero.hero-dark p.lead{color:rgba(255,255,255,.74)}
.hero.hero-dark .hero-meta{color:rgba(255,255,255,.52)}
.hero.hero-dark .hero-orbit{display:none}
.hero-grid{display:grid;grid-template-columns:1.04fr .96fr;gap:48px;align-items:center}
.hero-grid .hero-inner{max-width:640px}

/* 轨道系统 SVG */
.orbit-wrap{position:relative;display:flex;justify-content:center}
.orbit-svg{width:min(520px,100%);height:auto;display:block;overflow:visible}
.orbit-svg .ell{fill:none;stroke-width:1;vector-effect:non-scaling-stroke}
.orbit-svg .e1{stroke:rgba(255,255,255,.35)}
.orbit-svg .e2{stroke:rgba(255,255,255,.25)}
.orbit-svg .e3{stroke:rgba(255,255,255,.16)}
.orbit-svg .arc-o{fill:none;stroke:var(--orange);stroke-width:1.6;stroke-linecap:round;opacity:.9}
.orbit-svg .arc-g{fill:none;stroke:var(--gold);stroke-width:1.2;stroke-linecap:round;opacity:.55}
.orbit-svg .nd{fill:#fff}
.orbit-svg .nd-o{fill:var(--orange)}
.orbit-svg .nd-g{fill:var(--gold)}
.orbit-svg .nd-ring{fill:none;stroke:rgba(255,255,255,.4);stroke-width:1}
.orbit-svg .core{fill:none;stroke:rgba(255,255,255,.5);stroke-width:1.2}
.orbit-svg .core-dot{fill:var(--orange)}
.orbit-svg .lbl{fill:rgba(255,255,255,.55);font-size:11px;letter-spacing:.08em}
@keyframes orbitSpinSlow{from{transform:rotate(0)}to{transform:rotate(360deg)}}
@keyframes orbitSpinRev{from{transform:rotate(0)}to{transform:rotate(-360deg)}}
@keyframes corePulse{0%,100%{transform:scale(1);opacity:.9}50%{transform:scale(1.18);opacity:.45}}
@keyframes nodeBlink{0%,100%{opacity:1}50%{opacity:.35}}
@keyframes dashFlow{to{stroke-dashoffset:-220}}
.og1{animation:orbitSpinSlow 60s linear infinite;transform-origin:280px 280px}
.og2{animation:orbitSpinRev 84s linear infinite;transform-origin:280px 280px}
.og3{animation:orbitSpinSlow 108s linear infinite;transform-origin:280px 280px}
.orbit-svg .pulse{animation:corePulse 12s var(--ease-soft) infinite;transform-origin:280px 280px}
.orbit-svg .flow{stroke-dasharray:5 9;animation:dashFlow 26s linear infinite}
.orbit-svg .blink{animation:nodeBlink 6s var(--ease-soft) infinite}
.orbit-svg .blink2{animation:nodeBlink 8s var(--ease-soft) 1.2s infinite}

/* ---------- C · 生态位三圆图 ---------- */
.eco-split{display:grid;grid-template-columns:.92fr 1.08fr;gap:48px;align-items:center}
.eco-map{position:relative;max-width:640px;margin:0 auto}
.eco-map svg{width:100%;height:auto;display:block}
.eco-map .c-soft{fill:rgba(242,101,34,.05);stroke:var(--orange-line);stroke-width:1.2;stroke-dasharray:5 6}
.eco-map .c-tri{fill:rgba(20,32,46,.05);stroke:#cfd6de;stroke-width:1.2;stroke-dasharray:5 6}
.eco-map .c-core{fill:var(--navy);stroke:var(--orange);stroke-width:1.6}
.eco-map .c-ring{fill:none;stroke:rgba(242,101,34,.35);stroke-width:1}
.eco-lbl{position:absolute;transform:translate(-50%,-50%);text-align:center;line-height:1.35;pointer-events:none}
.eco-lbl b{display:block;font-size:15px;font-weight:700;color:var(--ink-2)}
.eco-lbl span{display:block;font-size:12px;color:var(--muted);margin-top:3px}
.eco-lbl.core b{color:#fff;font-size:16px}
.eco-lbl.core span{color:rgba(255,255,255,.66)}
.eco-lbl.core .ec{color:var(--gold);letter-spacing:.14em;font-size:10.5px;margin-bottom:6px;display:block}

/* ---------- B · 产品页 ---------- */
.sku-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(330px,1fr));gap:22px}
.sku-card{
  position:relative;overflow:hidden;isolation:isolate;
  background:#fff;border:1px solid var(--line);border-radius:16px;padding:28px;
  box-shadow:var(--shadow-sm);display:flex;flex-direction:column;
  transition:transform var(--dur-base) var(--ease-brand),box-shadow var(--dur-base) var(--ease-brand),border-color var(--dur-base) var(--ease-brand);
}
.sku-card::before{
  content:'';position:absolute;left:0;top:0;right:0;height:3px;
  background:linear-gradient(90deg,var(--orange),var(--gold));
  transform:scaleX(0);transform-origin:left center;
  transition:transform var(--dur-sheet) var(--ease-brand);
}
.sku-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lift);border-color:#eccdb8}
.sku-card:hover::before{transform:scaleX(1)}
.sku-card .cat{
  display:inline-block;align-self:flex-start;font-size:12px;font-weight:700;letter-spacing:.06em;
  color:var(--orange);background:var(--orange-soft);border:1px solid var(--orange-line);
  padding:4px 10px;border-radius:999px;margin-bottom:14px;
}
.sku-card h3{font-size:21px;font-weight:800;margin-bottom:6px}
.sku-card .pitch{font-size:13.5px;color:var(--muted);margin-bottom:12px}
.sku-card .posi{font-size:13.5px;color:var(--ink-2);background:var(--soft-2);border-radius:10px;padding:10px 12px;margin-bottom:16px;line-height:1.6}
.sku-price{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap;padding:14px 0;border-top:1px dashed var(--line);border-bottom:1px dashed var(--line)}
.sku-price .p{font-size:26px;font-weight:800;color:var(--orange);letter-spacing:.01em}
.sku-price .u{font-size:12px;color:var(--muted)}
.sku-kv{margin:14px 0 4px}
.sku-kv .row{display:grid;grid-template-columns:76px 1fr;gap:10px;font-size:13px;padding:7px 0;border-bottom:1px solid var(--line-2)}
.sku-kv .row:last-child{border-bottom:0}
.sku-kv .k{color:var(--muted);white-space:nowrap}
.sku-kv .v{color:var(--ink-2);line-height:1.6}
.sku-flags{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.sku-flags .f{font-size:12px;color:var(--ink-2);background:#fff;border:1px solid var(--line);padding:4px 10px;border-radius:999px}
.sku-specs{margin:14px 0 0;padding:12px 14px;background:var(--soft-2);border-radius:10px}
.sku-specs h5{font-size:12px;color:var(--orange);letter-spacing:.08em;margin-bottom:8px;font-weight:700}
.sku-specs ul{list-style:none}
.sku-specs li{position:relative;padding-left:16px;font-size:12.5px;color:var(--muted);line-height:1.7}
.sku-specs li::before{content:'';position:absolute;left:2px;top:.62em;width:5px;height:5px;border-radius:50%;background:var(--orange-line)}
.sku-scenes{margin-top:14px}
.sku-scenes h5{font-size:12px;color:var(--muted);letter-spacing:.08em;margin-bottom:8px;font-weight:700}
.sku-scenes .tags{display:flex;flex-wrap:wrap;gap:8px}
.sku-scenes .t{font-size:12px;color:var(--navy-2);background:rgba(20,32,46,.05);border:1px solid rgba(20,32,46,.1);padding:4px 10px;border-radius:8px;transition:all var(--dur-base) var(--ease-brand)}
.sku-card:hover .sku-scenes .t{border-color:var(--orange-line);color:var(--orange-hover)}
/* 价值公式 */
.formula{display:flex;align-items:stretch;justify-content:center;gap:0;flex-wrap:wrap}
.formula .fx{
  min-width:150px;flex:1;max-width:220px;
  background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px 16px;text-align:center;
  box-shadow:var(--shadow-sm);
  transition:transform var(--dur-base) var(--ease-brand),box-shadow var(--dur-base) var(--ease-brand),border-color var(--dur-base) var(--ease-brand);
}
.formula .fx:hover{transform:translateY(-4px);border-color:#eccdb8;box-shadow:var(--shadow-soft)}
.formula .fx b{display:block;font-size:17px;font-weight:800;color:var(--ink);margin-bottom:6px}
.formula .fx span{display:block;font-size:12.5px;color:var(--muted);line-height:1.6}
.formula .op{align-self:center;flex:none;width:44px;text-align:center;font-size:24px;font-weight:800;color:var(--orange);opacity:.7}
.formula .op.eq{color:var(--ink-2)}
.formula .fx.result{background:linear-gradient(140deg,var(--orange),#ff8a4a);border-color:transparent;box-shadow:var(--shadow-orange)}
.formula .fx.result b{color:#fff}
.formula .fx.result span{color:rgba(255,255,255,.88)}

/* ---------- D · 研究工作页 ---------- */
.research-toolbar{
  display:flex;gap:14px;align-items:center;justify-content:space-between;flex-wrap:wrap;
  background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px 16px;
  box-shadow:var(--shadow-sm);margin-bottom:34px;
}
.research-search{position:relative;flex:1;min-width:240px}
.research-search .ico{position:absolute;left:14px;top:50%;transform:translateY(-50%);color:var(--muted);font-size:15px;pointer-events:none}
.research-search input{
  width:100%;padding:11px 14px 11px 40px;border:1px solid var(--line);border-radius:10px;
  font:inherit;font-size:14.5px;color:var(--ink);background:var(--soft-2);
  transition:border-color var(--dur-base) linear,box-shadow var(--dur-base) var(--ease-brand),background-color var(--dur-base) linear;
}
.research-search input:hover{border-color:#d9d4cc}
.research-search input:focus{outline:0;background:#fff;border-color:var(--orange);box-shadow:0 0 0 3px rgba(242,101,34,.16)}
.view-toggle{display:inline-flex;border:1px solid var(--line);border-radius:10px;overflow:hidden;background:var(--soft-2)}
.view-toggle button{
  border:0;background:transparent;color:var(--muted);font-size:13.5px;font-weight:600;
  padding:10px 18px;cursor:pointer;
  transition:background-color var(--dur-base) linear,color var(--dur-base) linear;
}
.view-toggle button.on{background:#fff;color:var(--orange);box-shadow:0 2px 8px -4px rgba(20,32,46,.4)}
.research-count{font-size:12.5px;color:var(--muted)}
.rch-cards{display:flex;flex-direction:column;gap:22px}
.rch-card{
  display:grid;grid-template-columns:250px 1fr;gap:0;
  background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden;
  box-shadow:var(--shadow-sm);
  transition:transform var(--dur-base) var(--ease-brand),box-shadow var(--dur-base) var(--ease-brand),border-color var(--dur-base) var(--ease-brand);
}
.rch-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lift);border-color:#eccdb8}
.rch-visual{
  position:relative;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(150deg,var(--navy) 0%,var(--navy-2) 100%);
  min-height:190px;overflow:hidden;
}
.rch-visual::after{
  content:'';position:absolute;inset:0;pointer-events:none;
  background:
    repeating-linear-gradient(90deg,rgba(255,255,255,.045) 0 1px,transparent 1px 22px),
    repeating-linear-gradient(0deg,rgba(255,255,255,.045) 0 1px,transparent 1px 22px);
}
.rch-visual svg{width:82%;height:auto;position:relative;z-index:1}
.rch-body{padding:24px 28px;display:flex;flex-direction:column;justify-content:center}
.rch-body .meta{display:flex;align-items:center;gap:10px;margin-bottom:10px;flex-wrap:wrap}
.rch-body .rtag{
  font-size:11.5px;font-weight:700;letter-spacing:.05em;color:var(--orange);
  background:var(--orange-soft);border:1px solid var(--orange-line);
  padding:3px 10px;border-radius:999px;
}
.rch-body .eno{font-size:11px;color:var(--muted);letter-spacing:.14em}
.rch-body h3{font-size:20px;font-weight:800;margin-bottom:8px}
.rch-body p{font-size:14px;color:var(--muted);line-height:1.7}
.rch-body .card-link{margin-top:14px;align-self:flex-start}
.rch-list{display:none;flex-direction:column;gap:12px}
.research-area.list .rch-cards{display:none}
.research-area.list .rch-list{display:flex}
.rch-row{
  display:flex;align-items:center;gap:16px;
  background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px 20px;
  box-shadow:var(--shadow-sm);
  transition:transform var(--dur-base) var(--ease-brand),border-color var(--dur-base) var(--ease-brand),box-shadow var(--dur-base) var(--ease-brand);
}
.rch-row:hover{transform:translateX(4px);border-color:#eccdb8;box-shadow:var(--shadow-soft)}
.rch-row .mini{
  flex:none;width:44px;height:44px;border-radius:10px;
  background:linear-gradient(150deg,var(--navy),var(--navy-2));
  display:flex;align-items:center;justify-content:center;
}
.rch-row .mini svg{width:28px;height:28px}
.rch-row h4{font-size:15.5px;font-weight:700}
.rch-row p{font-size:12.5px;color:var(--muted);margin-top:2px}
.rch-row .rtag{margin-left:auto;flex:none}
.rch-row .go{flex:none;color:var(--orange);font-weight:700;transition:transform var(--dur-base) var(--ease-brand)}
.rch-row:hover .go{transform:translateX(4px)}
.rch-empty{
  display:none;text-align:center;padding:56px 20px;color:var(--muted);
  background:#fff;border:1px dashed var(--line);border-radius:14px;
}
.rch-empty b{display:block;font-size:16px;color:var(--ink-2);margin-bottom:6px}
.research-area.empty .rch-empty{display:block}
.research-area.empty .rch-cards,.research-area.empty .rch-list{display:none}

/* ---------- E · 关于页 ---------- */
.manifesto{
  position:relative;overflow:hidden;isolation:isolate;
  padding:88px 0 72px;border-bottom:1px solid var(--line);
  background:
    radial-gradient(760px 340px at 92% -20%,rgba(242,101,34,.10),transparent 60%),
    linear-gradient(180deg,var(--paper-warm),#fff 86%);
}
.manifesto::before{
  content:'';position:absolute;inset:-14% -6%;z-index:-1;pointer-events:none;
  background-image:
    repeating-linear-gradient(90deg,var(--grid-line) 0 1px,transparent 1px 24px),
    repeating-linear-gradient(0deg,var(--grid-line) 0 1px,transparent 1px 24px);
  -webkit-mask-image:radial-gradient(700px 320px at 16% 40%,#000 4%,transparent 72%);
  mask-image:radial-gradient(700px 320px at 16% 40%,#000 4%,transparent 72%);
  animation:gridDrift 18s var(--ease-soft) infinite alternate;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:12.5px;font-weight:700;letter-spacing:.22em;color:var(--orange);
  text-transform:uppercase;margin-bottom:16px;
}
.eyebrow::before{content:'';width:26px;height:1px;background:currentColor;opacity:.6}
.manifesto .brand-line{font-size:13px;color:var(--muted);letter-spacing:.1em;margin-bottom:22px}
.manifesto h1{font-size:clamp(30px,4.6vw,50px);line-height:1.3;font-weight:800;color:var(--ink);max-width:760px}
.manifesto h1 .hl{color:var(--orange)}
.manifesto p.lead{margin-top:20px;font-size:17px;color:var(--muted);max-width:640px}
.stat-band{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:38px}
.stat-card{
  position:relative;overflow:hidden;isolation:isolate;
  background:#fff;border:1px solid var(--line);border-radius:16px;padding:26px 28px;
  box-shadow:var(--shadow-sm);
  transition:transform var(--dur-base) var(--ease-brand),box-shadow var(--dur-base) var(--ease-brand),border-color var(--dur-base) var(--ease-brand);
}
.stat-card::after{
  content:'';position:absolute;right:-34px;bottom:-34px;width:110px;height:110px;border-radius:50%;
  border:1px solid var(--orange-line);opacity:.55;pointer-events:none;
}
.stat-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-soft);border-color:#eccdb8}
.stat-card .num{font-size:clamp(30px,3.6vw,42px);font-weight:800;color:var(--orange);line-height:1.1;font-variant-numeric:tabular-nums}
.stat-card .num small{font-size:15px;font-weight:700;opacity:.85}
.stat-card h4{font-size:15px;font-weight:700;margin-top:10px;color:var(--ink)}
.stat-card p{font-size:12.5px;color:var(--muted);margin-top:6px}
.stat-card .ec{font-size:10.5px;letter-spacing:.16em;color:var(--muted);opacity:.7;margin-top:10px;display:block}
.about-slogan{font-size:clamp(24px,3vw,32px);font-weight:800;line-height:1.45;color:var(--ink);position:relative;padding-left:18px}
.about-slogan::before{content:'';position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:4px;background:linear-gradient(180deg,var(--orange),var(--gold))}
.about-slogan .hl{color:var(--orange)}
.pathway{position:relative;margin-top:44px}
.pathway svg{width:100%;height:auto;display:block;overflow:visible}
.pathway .curve{fill:none;stroke:var(--orange);stroke-width:2}
.pathway .grid-l{stroke:var(--line);stroke-width:1}
.pathway .nd{fill:#fff;stroke:var(--orange);stroke-width:2}
.pathway .nd-fill{fill:var(--orange)}
.pathway .stage{font-size:14px;font-weight:700;fill:var(--ink)}
.pathway .dur{font-size:11.5px;fill:var(--muted)}
.pathway .ph{font-size:10.5px;fill:var(--orange);letter-spacing:.16em}
@keyframes dashDraw{from{stroke-dashoffset:1200}to{stroke-dashoffset:0}}
.pathway .curve{stroke-dasharray:1200;animation:dashDraw 2.6s var(--ease-reveal) both}
@keyframes nodePop{from{opacity:0;transform:scale(.4)}to{opacity:1;transform:scale(1)}}
.pathway .nd,.pathway .nd-fill{animation:nodePop .5s var(--ease-brand) both;transform-box:fill-box;transform-origin:center}
.pathway .n2{animation-delay:.35s}.pathway .n3{animation-delay:.7s}
.pathway .n4{animation-delay:1.05s}.pathway .n5{animation-delay:1.4s}

/* ---------- 响应式（V3 增量） ---------- */
@media (max-width:960px){
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .orbit-wrap{order:-1}
  .orbit-svg{width:min(380px,88%)}
  .eco-split{grid-template-columns:1fr;gap:30px}
  .rch-card{grid-template-columns:1fr}
  .rch-visual{min-height:150px}
  .stat-band{grid-template-columns:1fr}
  .formula .fx{min-width:130px}
}
@media (max-width:680px){
  .hero.hero-dark{padding:80px 0 68px}
  .orbit-svg{width:min(300px,92%)}
  .rch-row{flex-wrap:wrap}
  .rch-row .rtag{margin-left:0}
  .formula{gap:10px}
  .formula .op{width:30px;font-size:20px}
  .formula .fx{min-width:calc(50% - 20px)}
  .sku-grid{grid-template-columns:1fr}
}

/* ---------- 降级（补充 V3 元素） ---------- */
@media (prefers-reduced-motion:reduce){
  .og1,.og2,.og3,.orbit-svg .pulse,.orbit-svg .flow,.orbit-svg .blink,.orbit-svg .blink2,
  .pathway .curve,.pathway .nd,.pathway .nd-fill,.manifesto::before,
  .nav-check:checked ~ .nav-panel{animation:none !important}
  .pathway .curve{stroke-dasharray:none}
  .sku-card:hover,.rch-card:hover,.rch-row:hover,.stat-card:hover,.formula .fx:hover{transform:none !important}
}

/* ============================================================
   V3.1 动态视觉层：光雾 canvas / 3D 悬停 / 产品线框视觉 / 滚动视差
   ============================================================ */

/* ---------- 光雾 canvas ---------- */
.aurora-canvas{
  position:absolute;inset:0;width:100%;height:100%;
  pointer-events:none;z-index:-1;
}
[data-aurora]{position:relative}
.hero.hero-dark .aurora-canvas{z-index:-2}
.hero.hero-dark::before{z-index:-1}
.page-banner .aurora-canvas{z-index:0}
.page-banner::before{z-index:1}
.page-banner > .container{position:relative;z-index:2}
.manifesto .aurora-canvas{z-index:-2}
.manifesto::before{z-index:-1}
.manifesto > .container{position:relative;z-index:2}

/* ---------- 首页 hero：光雾叠加 + 轨道微视差 ---------- */
.hero.hero-dark{
  background:
    radial-gradient(900px 420px at 82% -10%,rgba(242,101,34,.14),transparent 60%),
    linear-gradient(180deg,#10131A 0%,#12161f 58%,#0c0f16 100%);
}
.orbit-wrap{will-change:transform}
@keyframes orbitFloat{
  0%,100%{transform:translateY(0) rotate(0deg)}
  50%{transform:translateY(-14px) rotate(1.2deg)}
}
.orbit-wrap{animation:orbitFloat 9s var(--ease-soft) infinite}

/* ---------- 纸感页头光雾（内页统一质感） ---------- */
.page-banner{position:relative}
.page-banner .aurora-canvas{opacity:.9}

/* ---------- 卡片 3D 悬停（全站统一） ---------- */
@media (hover:hover) and (prefers-reduced-motion:no-preference){
  .card,.sku-card,.rch-card,.logo-card,.stat-card,.contact-card{
    transform-style:preserve-3d;
    transition:transform var(--dur-base) var(--ease-brand),
               box-shadow var(--dur-base) var(--ease-brand),
               border-color var(--dur-base) var(--ease-brand);
  }
  .card:hover,.sku-card:hover,.rch-card:hover,.logo-card:hover,.stat-card:hover,.contact-card:hover{
    transform:perspective(880px) rotateX(3.4deg) rotateY(-5.6deg) translateY(-7px) scale(1.015);
    box-shadow:var(--shadow-lift),0 34px 64px -30px rgba(20,32,46,.45);
  }
  .sku-card:hover,.rch-card:hover,.stat-card:hover{
    border-color:rgba(242,101,34,.38);
  }
  .sku-card::after,.rch-card::after,.stat-card::after{
    content:'';position:absolute;inset:0;border-radius:inherit;pointer-events:none;z-index:3;
    background:linear-gradient(115deg,transparent 34%,rgba(255,255,255,.34) 78%,rgba(255,255,255,.5) 100%);
    opacity:0;transition:opacity var(--dur-base) var(--ease-brand);
  }
  .sku-card:hover::after,.rch-card:hover::after,.stat-card:hover::after{opacity:1}
  .card .icon,.sku-card h3,.rch-card h3,.stat-card .num{
    transform:translateZ(24px);
    transition:transform var(--dur-base) var(--ease-brand);
  }
  .card:hover .icon{transform:translateZ(34px) rotate(-4deg)}
  .sku-card:hover h3{transform:translateZ(30px)}
  .rch-card:hover h3{transform:translateZ(30px)}
  .stat-card:hover .num{transform:translateZ(30px)}
}

/* ---------- 产品卡：硬件线框视觉（左上角 SVG 线框图 + 扫描线） ---------- */
.sku-card{padding-top:118px}
.sku-visual{
  position:absolute;top:0;left:0;right:0;height:96px;z-index:4;
  display:flex;align-items:center;justify-content:flex-start;
  padding-left:28px;pointer-events:none;
}
.sku-visual svg{width:132px;height:70px;opacity:1;filter:drop-shadow(0 0 6px rgba(242,101,34,.25))}
.sku-card .cat{margin-bottom:0}
.sku-visual .box-line{stroke:var(--orange);stroke-width:1.6;fill:none}
.sku-visual .box-dim{stroke:rgba(17,24,39,.22);stroke-width:1;fill:none}
.sku-visual .box-screen{fill:rgba(242,101,34,.14);stroke:var(--orange);stroke-width:1.4}
.sku-visual .box-glow{fill:rgba(242,10,34,0)}
@keyframes scanY{
  0%{transform:translateY(0);opacity:0}
  8%{opacity:.85}
  50%{transform:translateY(44px);opacity:.5}
  92%{opacity:.85}
  100%{transform:translateY(56px);opacity:0}
}
.sku-visual .scanline{
  position:absolute;left:22px;top:26px;width:96px;height:2px;
  background:linear-gradient(90deg,transparent,rgba(242,101,34,.9),transparent);
  box-shadow:0 0 8px rgba(242,101,34,.55);
  opacity:0;animation:scanY 3.4s var(--ease-soft) infinite;
}
.sku-visual .scanline.d2{animation-delay:2.1s;left:30px;width:70px}

/* ---------- 滚动视差：hero 内容与轨道差速 ---------- */
.hero-grid > .hero-inner{will-change:transform}
.orbit-wrap{margin-left:auto;margin-right:auto}

/* ---------- 数字卡 / 里程碑 pop ---------- */
.stat-card .num{position:relative;z-index:2}

/* ---------- 研究页视觉区粒子点缀 ---------- */
.rch-visual::before{
  content:'';position:absolute;inset:0;z-index:0;pointer-events:none;
  background-image:
    radial-gradient(1.6px 1.6px at 18% 30%,rgba(255,255,255,.5) 45%,transparent 55%),
    radial-gradient(1.4px 1.4px at 72% 22%,rgba(255,255,255,.4) 45%,transparent 55%),
    radial-gradient(1.8px 1.8px at 36% 74%,rgba(242,101,34,.55) 45%,transparent  .55%),
    radial-gradient(1.2px 1.2px at 85% 68%,rgba(255,255,255,.35) 45%,transparent 55%),
    radial-gradient(1.5px 1.5px at 55% 12%,rgba(201,160,106,.5) 45%,transparent 55%);
}

/* ---------- CTA 光带扫过 ---------- */
.cta-band{overflow:hidden}
@keyframes ctaSheen{
  0%{transform:translateX(-130%) skewX(-16deg)}
  55%,100%{transform:translateX(240%) skewX(-16deg)}
}
.cta-band::before{
  content:'';position:absolute;top:0;bottom:0;left:0;width:38%;
  background:linear-gradient(100deg,transparent,rgba(255,255,255,.075),transparent);
  z-index:1;pointer-events:none;
  animation:ctaSheen 7s var(--ease-soft) infinite;
}

/* ---------- 降级 ---------- */
@media (prefers-reduced-motion:reduce){
  .orbit-wrap{animation:none !important}
  .sku-visual .scanline{display:none !important}
  .cta-band::before{display:none !important}
  .card:hover,.sku-card:hover,.rch-card:hover,.logo-card:hover,.stat-card:hover,.contact-card:hover{
    transform:translateY(-6px) !important;
  }
}