:root{
  /* page-only extras; colors/type/spacing come from tokens.css */
  --max-w:var(--max-width,1440px);
  --nav-max:1280px;
  --bg-dark:#0a1628;
  --bg-grid:rgba(0,87,156,0.04);
  --purple:#38338a;--purple-dim:rgba(56,51,138,0.10);
  --hci-brown:#614200;--hci-dim:rgba(97,66,0,0.10);
}

/* 锚点区块避让：贴顶条 + 主导航高度 */
.product-downloads-page .product-section[id]{
  scroll-margin-top: calc(var(--nav-height, 64px) + 72px);
}

/* 哨兵：Hero 滚出后触发贴顶条 */
.pd-hub-jump-sentinel{
  height:1px;
  margin:0;
  padding:0;
  pointer-events:none;
  visibility:hidden;
}

/* 贴顶二级跳转条（fixed，不占文档流） */
.pd-hub-jump-sticky{
  position:fixed;
  top:var(--nav-height, 64px);
  left:0;
  right:0;
  z-index:40;
  border-bottom:1px solid rgba(15,27,45,0.08);
  background:rgba(255,255,255,0.94);
  backdrop-filter:saturate(1.2) blur(12px);
  -webkit-backdrop-filter:saturate(1.2) blur(12px);
  box-shadow:0 10px 28px -20px rgba(15,27,45,0.45);
  transform:translateY(-110%);
  opacity:0;
  pointer-events:none;
  visibility:hidden;
  transition:transform .22s ease, opacity .22s ease, visibility .22s ease;
}

.pd-hub-jump-sticky.is-visible{
  transform:translateY(0);
  opacity:1;
  pointer-events:auto;
  visibility:visible;
}

.pd-hub-jump-sticky-inner{
  max-width:var(--max-w, 1440px);
  margin:0 auto;
  padding:10px var(--space-gutter, 24px);
  display:flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  box-sizing:border-box;
}

.pd-hub-jump-sticky-nav{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-width:0;
}

/* 贴顶跳转按钮：与产品角标 pd-product-badge 同款，hover/激活反色 */
.pd-hub-jump-sticky-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  height:28px;
  min-height:28px;
  padding:0 14px;
  border:none;
  border-radius:var(--radius-pill, 999px);
  background:rgba(255, 255, 255, 0.01);
  box-shadow:inset 0px -7px 12px 0px rgba(0, 87, 156, 0.12);
  color:var(--color-primary, #00579c);
  font-family:var(--font-sans, var(--font));
  font-size:var(--font-size-caption, 12px);
  font-weight:600;
  letter-spacing:.04em;
  line-height:1;
  text-decoration:none;
  transition:background .18s ease, color .18s ease, box-shadow .18s ease;
}

.pd-hub-jump-sticky-btn:hover,
.pd-hub-jump-sticky-btn.is-active{
  background:var(--color-primary, #00579c);
  color:#fff;
  box-shadow:inset 0px -7px 12px 0px rgba(0, 0, 0, 0.18);
}

@media (max-width:720px){
  .pd-hub-jump-sticky-inner{
    gap:8px;
    padding:8px var(--space-gutter, 16px);
  }
  .pd-hub-jump-sticky-nav{
    width:100%;
    flex-wrap:nowrap;
    justify-content:flex-start;
    overflow-x:auto;
    scrollbar-width:none;
    -webkit-overflow-scrolling:touch;
  }
  .pd-hub-jump-sticky-nav::-webkit-scrollbar{display:none}
  .pd-hub-jump-sticky-btn{flex-shrink:0}
}

@media (prefers-reduced-motion:reduce){
  .pd-hub-jump-sticky{transition:none}
}

.product-downloads-page{font-family:var(--font-sans,var(--font));color:var(--color-title,var(--t1));background:var(--bg);line-height:1.65;-webkit-font-smoothing:antialiased}
.product-downloads-page a{text-decoration:none}

/* ─── PRODUCT SECTION ─── */
.product-section{padding:var(--space-section) var(--space-gutter) ;position:relative;overflow:hidden}
.product-section.alt{background:var(--bg-alt)}
.product-section.dark{background:var(--bg-alt);color:var(--t1)}
.product-section.dark::before{content:none}
.product-section.dark::after{content:none}
.product-inner{max-width:var(--max-w);margin:0 auto;position:relative;z-index:1}

/* Product header */
.product-header{display:flex;align-items:center;gap:16px;margin-bottom:8px}
.product-icon{width:52px;height:52px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-family:var(--font);font-size:14px;font-weight:700;color:#fff;flex-shrink:0;letter-spacing:.04em}
.product-icon.zcf{background:var(--blue)}
.product-icon.zvf{background:var(--blue)}
.product-icon.hci{background:var(--blue)}
.product-icon.aios{background:var(--blue)}
.product-title{font-size: 30px;font-weight: 500;letter-spacing:-.02em;line-height:1.2}
.product-tag{display:inline-flex;align-items:center;gap:5px;padding:4px 12px;border-radius:100px;font-size:10px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;font-family:var(--font);margin-left:12px}
.product-tag.free{background:rgba(0,137,123,.12);color:var(--teal)}
.product-tag.contact{background:rgba(0,87,156,.16);color:#8ac4f0;border:1px solid rgba(255,255,255,.12)}
.product-subtitle{font-size:14px;color:var(--t2);line-height:1.7;margin-bottom:32px}
.product-section.dark .product-subtitle{color:var(--t2)}

/* Version strip */
.version-strip{display:flex;gap:24px;flex-wrap:wrap;align-items:center;justify-content:center;padding:12px 24px;background:transparent;border:none;border-radius:0;margin-bottom:32px;font-size:12px}
.product-section.dark .version-strip{background:transparent;border:none}
.vs-item{display:flex;align-items:center;gap:6px}
.vs-label{color:var(--t3);font-family:var(--font);font-size:10px;font-weight:700;letter-spacing:.08em;text-transform:uppercase}
.product-section.dark .vs-label{color:var(--t3)}
.vs-val{font-family:var(--font);font-weight:600;color:var(--t1)}
.product-section.dark .vs-val{color:var(--t1)}
.vs-val.hl{color:var(--blue);font-size:14px}
.product-section.dark .vs-val.hl{color:var(--blue)}
.vs-sep{width:1px;height:20px;background:var(--border)}
.product-section.dark .vs-sep{background:var(--border)}

/* Download grid */
.dl-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:14px;margin-bottom:16px}
.dl-card{background:#fff;border:1px solid var(--border);border-radius:12px;padding:20px;display:flex;flex-direction:column;gap:10px;transition:all .25s}
.dl-card:hover{border-color:var(--border-hi)}
.product-section.alt .dl-card{background:#fff}
.product-section.dark .dl-card{background:#fff;border-color:var(--border)}
.product-section.dark .dl-card:hover{background:#fff;border-color:var(--border-hi);box-shadow:0 8px 28px var(--blue-glow)}
.dl-card-top{display:flex;align-items:center;gap:12px}
.dl-card-icon{width:36px;height:36px;border-radius:9px;background:var(--blue-faint);display:flex;align-items:center;justify-content:center;flex-shrink:0}
.dl-card-icon svg{width:18px;height:18px;color:var(--blue)}
.product-section.dark .dl-card-icon{background:var(--blue-faint)}
.product-section.dark .dl-card-icon svg{color:var(--blue)}
.dl-card-info{flex:1;min-width:0}
.dl-card-name{font-size:14px;font-weight:600;line-height:1.3}
.product-section.dark .dl-card-name{color:var(--t1)}
.dl-card-detail{font-size:11px;color:var(--t3);margin-top:2px;line-height:1.5}
.product-section.dark .dl-card-detail{color:var(--t3)}
.dl-card-meta{display:flex;gap:10px;align-items:center;font-family:var(--font);font-size:10px;color:var(--t3);letter-spacing:.04em}
.product-section.dark .dl-card-meta{color:var(--t3)}
.dl-card-meta span{display:flex;align-items:center;gap:4px}
.dl-btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:9px 0;border-radius:8px;background:var(--blue);color:#fff;font-size:12px;font-weight:600;border:none;cursor:pointer;transition:all .2s;text-decoration:none;font-family:var(--font);width:100%;margin-top:auto}
.dl-btn:hover{background:var(--blue-dim);transform:translateY(-1px);box-shadow:0 4px 12px var(--blue-glow)}
.dl-btn svg{width:12px;height:12px}
.dl-btn.ghost{background:transparent;color:var(--blue);border:1px solid var(--blue-mid)}
.dl-btn.ghost:hover{background:var(--blue-faint);box-shadow:none;transform:none}
.product-section.dark .dl-btn{background:var(--blue);color:#fff}
.product-section.dark .dl-btn:hover{background:var(--blue-dim);box-shadow:0 4px 12px var(--blue-glow)}
.product-section.dark .dl-btn.ghost{background:transparent;color:var(--blue);border-color:var(--blue-mid)}
.product-section.dark .dl-btn.ghost:hover{background:var(--blue-faint)}

/* Older versions link */
.older-link{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:18px 20px;background:transparent;border:1px dashed var(--border);border-radius:10px;font-size:12px;margin-bottom:0;transition:all .2s;gap:6px;text-align:center}
.older-link:hover{border-color:var(--border-hi);background:rgba(0,87,156,.02)}
.product-section.alt .older-link{background:transparent}
.product-section.dark .older-link{background:transparent;border-color:var(--border)}
.product-section.dark .older-link:hover{background:rgba(0,87,156,.02);border-color:var(--border-hi)}
.older-link-note{color:var(--t3);display:flex;align-items:center;gap:6px}
.product-section.dark .older-link-note{color:var(--t3)}
.older-link-cta{color:var(--blue);font-weight:600;display:inline-flex;align-items:center;gap:5px}
.older-link-cta:hover{color:var(--blue-dim)}
.product-section.dark .older-link-cta{color:var(--blue)}

/* Evaluate panel for HCI/AIOS */
.evaluate-panel{display:grid;grid-template-columns:1.2fr 1fr;gap:32px;align-items:center;background:#fff;border:none;border-radius:0;padding:40px;box-shadow:0 12px 40px rgba(24,28,33,0.04)}
.evaluate-headline{font-size:24px;font-weight: 500;line-height:1.3;margin-bottom:12px;color:var(--t1)}
.evaluate-text{font-size:14px;color:var(--t2);line-height:1.7;margin-bottom:0}
.evaluate-features{display:flex;flex-direction:column;gap:12px}
.evaluate-feat{display:flex;align-items:flex-start;gap:10px;font-size:13px;color:var(--t2);line-height:1.6}
.evaluate-feat svg{width:16px;height:16px;color:var(--blue);flex-shrink:0;margin-top:2px}
.evaluate-feat strong{color:var(--t1);font-weight:600}
.evaluate-cta-row{display:flex;gap:12px;margin-top:24px;flex-wrap:wrap}
.evaluate-btn{display:inline-flex;align-items:center;gap:8px;padding:15px 32px;border-radius:12px;background:var(--blue);color:#fff;font-size: 18px;font-weight:700;border:none;cursor:pointer;transition:all .2s;text-decoration:none}
.evaluate-btn:hover{background:var(--blue-dim);transform:translateY(-1px);box-shadow:0 6px 20px var(--blue-glow)}
.evaluate-btn.ghost{background:#fff;color:var(--t1);border:2px solid var(--border);font-weight:600}
.evaluate-btn.ghost:hover{background:var(--bg-alt);border-color:var(--border-hi)}
.evaluate-btn svg{width:14px;height:14px}

/* ─── RESOURCES SECTION ─── */
.resources-section{padding:80px 32px;background:var(--bg-alt)}
.resources-inner{max-width:var(--max-w);margin:0 auto}
.resources-head{margin-bottom:40px}
.resources-lbl{display:inline-flex;align-items:center;gap:6px;padding:5px 14px;border-radius:100px;background:var(--blue-faint);font-size:11px;font-weight:700;letter-spacing:.11em;text-transform:uppercase;color:var(--blue);font-family:var(--font);margin-bottom:14px}
.resources-h2{font-size: 36px; font-weight: 500;letter-spacing:-.02em;line-height:1.2;margin-bottom:8px}
.resources-sub{font-size: 18px;color:var(--t2);max-width:600px;line-height:1.7}
.resources-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.res-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:0;text-decoration:none;display:flex;flex-direction:column;gap:0;transition:all .25s;color:inherit;overflow:hidden}
.res-card:hover{border-color:var(--border-hi);transform:translateY(-3px);box-shadow:0 8px 28px var(--blue-glow)}

.res-icon{width:100%;height:200px;border-radius:12px 12px 0 0;background:linear-gradient(135deg,#f1f5f9 0%,#e2e8f0 100%);display:flex;align-items:center;justify-content:center;margin-bottom:0;position:relative;overflow:hidden}
.res-icon img{width:100%;height:100%;object-fit:cover}
.res-card h3{font-size: 21px;font-weight:700;line-height:1.3;padding:20px 24px 0}
.res-card p{font-size: 14px;color:var(--t2);line-height:1.65;flex-grow:1;padding:8px 24px 0}
.res-card-link{font-size:12px;color:var(--blue);font-weight:600;display:inline-flex;align-items:center;gap:5px;font-family:var(--font);letter-spacing:.04em;text-transform:uppercase;padding:16px 24px 24px}
.res-card-link svg{width:11px;height:11px;transition:transform .2s}
.res-card:hover .res-card-link svg{transform:translateX(3px)}

/* Fade animation */
.fade{opacity:0;transform:translateY(18px);transition:opacity .5s ease,transform .5s ease}
.fade.in{opacity:1;transform:translateY(0)}

/* ─── INSTALL FLOW (vertical document) ─── */
.install-flow{display:flex;flex-direction:column;position:relative;padding-left:60px;margin-bottom:24px}
.install-flow::before{content:'';position:absolute;left:24px;top:34px;bottom:34px;width:2px;background:var(--border)}
.install-step{position:relative;padding-bottom:32px}
.install-step:last-child{padding-bottom:0}
.install-step-marker{position:absolute;left:-60px;top:0}
.install-step-dot{width:50px;height:50px;border-radius:50%;background:var(--blue);color:#fff;display:flex;align-items:center;justify-content:center;font-family:var(--font);font-size: 18px;font-weight:700;z-index:1;position:relative;box-shadow:0 0 0 4px #fff}
.product-section.alt .install-step-dot{box-shadow:0 0 0 4px var(--bg-alt)}
.product-section.dark .install-step-dot{box-shadow:0 0 0 4px var(--bg-alt)}
.install-step-dot.is-dashed{background:#fff;color:var(--t3);border:2px dashed var(--border);box-shadow:0 0 0 4px #fff}
.product-section.alt .install-step-dot.is-dashed{box-shadow:0 0 0 4px var(--bg-alt)}
.install-step-body{flex:1;min-width:0}
.install-step-heading{display:flex;align-items:center;gap:14px;margin-bottom:18px;padding-top:10px}
.install-step-label{font-family:var(--font);font-size:10px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--t3)}
.install-step-title{font-size:20px;font-weight: 500;color:var(--t1);line-height:1.3}
.product-section.dark .install-step-title{color:var(--t1)}
.install-step-badge{display:inline-flex;font-family:var(--font);font-size:9px;font-weight:700;padding:3px 10px;border-radius:4px;background:#fef3c7;color:#d97706;border:1px solid #fde68a;letter-spacing:.04em;margin-left:auto;flex-shrink:0}
.install-step-badge.is-muted{background:#e2e8f0;color:var(--t3);border-color:var(--border)}
.install-step-card{background:var(--bg-alt);border:1px solid var(--border);border-radius:10px;overflow:hidden}
.product-section.alt .install-step-card{background:#fff}
.product-section.dark .install-step-card{background:#fff;border-color:var(--border)}
.install-step-card-inner{padding:18px 20px}
.install-step-card-head{display:flex;align-items:center;justify-content:space-between;padding:14px 20px 12px;border-bottom:1px solid var(--border)}
.install-step-card-head-left{display:flex;align-items:center;gap:10px}
.install-step-card-number{width:26px;height:26px;border-radius:50%;background:var(--blue);color:#fff;display:flex;align-items:center;justify-content:center;font-family:var(--font);font-size:12px;font-weight:700;flex-shrink:0}
.install-step-card-number.is-muted{background:var(--bg-alt);color:var(--t3);border:1px dashed var(--border)}

/* Global agreement disclaimer */
.agreement-global{max-width:var(--max-w);margin:0 auto;padding:0 32px;text-align:center}
.agreement-global-inner{display:inline-flex;align-items:center;gap:6px;font-size:var( --font-size-body);color:var(--t3);padding:10px 20px;background: #00579C;border-radius:100px}
.agreement-global-inner svg{width:12px;height:12px;flex-shrink:0;color:var(--t3)}
.agreement-global-inner {color: #fff;font-weight:600;text-decoration:underline;text-underline-offset:2px; transition: all .3s ease;}
.agreement-global-inner:hover{
  background:var(--color-primary-dim);
  color:#fff;
  transform:translateY(-2px);
  box-shadow:0 14px 32px -12px rgba(0,87,156,0.6);
}

/* Scan-line decoration on sections */
.scan-deco{position:absolute;top:0;right:0;width:400px;height:100%;pointer-events:none;opacity:.04;z-index:0}
.scan-deco line{stroke:var(--blue);stroke-width:.5}

/* HCI/AIOS section separator */
.product-section.dark+.product-section.dark{border-top:none}

/* ─── STEP TIMELINE（通用 + ZVF 旧结构） ─── */
.step-wrap{display:flex;gap:var(--space-card);align-items:stretch;position:relative;padding:10px 0}
.step-nav{display:flex;flex-direction:column;align-items:center;width:48px;flex-shrink:0;position:relative;padding-top:6px}
.step-line{position:absolute;top:0;bottom:0;left:50%;width:2px;background:var(--color-border);transform:translateX(-50%);z-index:0}
.step-dot{width:32px;height:32px;border-radius:50%;background:#fff;border:2px solid var(--color-border);display:flex;align-items:center;justify-content:center;font-family:var(--font-sans);font-size:var(--font-size-sm);font-weight:700;color:var(--t3);position:relative;z-index:1;cursor:pointer;transition:all .35s ease}
.step-dot.active{background:var(--color-primary);border-color:var(--color-primary);color:#fff;box-shadow:0 0 0 6px rgba(0,87,156,.12)}
.step-dot:hover{border-color:var(--color-primary);color:var(--color-primary)}
.step-dot.active:hover{color:#fff}
.step-dot.opened:not(.active){background:#fff;border-color:var(--color-border);color:var(--t3);box-shadow:none}
.step-dot-gap{flex:1;min-height:16px}
.step-cards{flex:1;min-width:0;position:relative}
.step-card{transition:all .4s ease;opacity:.5;cursor:pointer;overflow:hidden;margin-bottom:8px;max-height:68px;position:relative}
.step-card::after{content:'';position:absolute;bottom:0;left:0;right:0;height:32px;background:linear-gradient(transparent,#fff);pointer-events:none;transition:opacity .4s}
.step-card.active{opacity:1;cursor:default;max-height:2000px}
.step-card.active::after{opacity:0}
.product-section.alt .step-card::after{background:linear-gradient(transparent,var(--bg-alt))}

/* ═══ ZCF / ZVF 设计稿布局（tokens） ═══ */
.pd-product .pd-product-head{
  text-align:center;
  max-width:920px;
  margin:0 auto var(--space-module);
}
.pd-product .pd-product-badge{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  height:28px;
  padding:0 14px;
  margin-bottom:var(--space-card);
  border-radius:var(--radius-pill);
  background: rgba(255, 255, 255, 0.01);

  box-shadow: inset 0px -7px 12px 0px rgba(0, 87, 156, 0.12);
  color:var(--color-primary);
  font-family:var(--font-sans);
  font-size:var(--font-size-caption);
  font-weight:600;
  letter-spacing:.04em;
}
.pd-product .pd-product-title{
  margin:0 0 var(--space-card);
  color:var(--color-title);
  font-family:var(--font-sans);
  font-size:var(--font-size-page-title);
  font-weight:500;
  letter-spacing:-.02em;
  line-height:1.25;
}
.pd-product .pd-product-desc{
  margin:0 auto;
  max-width:820px;
  color:var(--color-text-secondary);
  font-family:var(--font-sans);
  font-size:var(--font-size-body);
  line-height:1.7;
}
.pd-product .pd-product-head .pd-eval-btn{
  margin-top:var(--space-card);
}

.pd-product .pd-install-title{
  display:flex;
  align-items:center;
  gap:12px;
  margin-bottom:var(--space-card);
  color:var(--color-title);
  font-family:var(--font-sans);
  font-size:var(--font-size-lg);
  font-weight:600;
  line-height:1.4;
}
.pd-product .pd-install-icon{
  width:36px;
  height:36px;
  border-radius:var(--radius-sm);
  background:rgba(0,87,156,0.08);
  color:var(--color-primary);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  flex-shrink:0;
}
.pd-product .pd-install-icon svg{width:18px;height:18px}

.pd-product .step-wrap{gap:var(--space-card);padding:0;align-items:stretch}

/* 左侧选中轨：灰底线 + 蓝色选中段 */
.pd-product .pd-step-rail{
  width:10px;
  flex-shrink:0;
  padding:0;
  position:relative;
  align-self:stretch;
  display:block;
}
.pd-product .pd-step-track{
  position:absolute;
  top:0;
  bottom:0;
  left:50%;
  width:3px;
  transform:translateX(-50%);
  background:var(--color-border);
  border-radius:var(--radius-pill);
}
.pd-product .pd-step-indicator{
  position:absolute;
  top:0;
  left:50%;
  width:4px;
  height:0;
  margin-left:-2px;
  background:#00579c;
  background:var(--color-primary, #00579c);
  border-radius:var(--radius-pill);
  transform:translateY(0);
  transition:transform .45s cubic-bezier(.22,1,.36,1),height .56s cubic-bezier(.22,1,.36,1);
  will-change:transform,height;
  z-index:2;
}

.pd-product .pd-step{
  opacity:1;
  margin-bottom:12px;
  border:1px solid var(--color-border);
  border-radius:var(--radius-md);
  background:rgba(210,231,255,0.28);
  max-height:var(--collapsed-height,64px);
  padding:0;
  overflow:hidden;
  transition:max-height .56s cubic-bezier(.22,1,.36,1),border-color .25s ease,box-shadow .25s ease,background .25s ease;
}
.pd-product .pd-step::after{display:none}
.pd-product .pd-step:not(.active):hover{
  border-color:rgba(0,87,156,0.35);
  background:rgba(210,231,255,0.45);
}
.pd-product .pd-step.active{
  max-height:var(--expanded-height,720px);
  background:#fff;
  border-color:var(--color-border);
  box-shadow:var(--shadow-selected);
  cursor:default;
}

.pd-product .pd-step-bar{
  display:none;
  align-items:center;
  flex-wrap:wrap;
  gap:10px 12px;
  min-height:64px;
  padding:14px var(--space-card);
  box-sizing:border-box;
}
.pd-product .pd-step:not(.active) .pd-step-bar{display:flex}
.pd-product .pd-step.active .pd-step-bar{display:none}

.pd-product .pd-step-panel{
  display:grid;
  grid-template-columns:minmax(200px,280px) minmax(0,1fr);
  gap:var(--space-card);
  align-items:stretch;
 
  opacity:0;
  pointer-events:none;
  transform:translateY(6px);
  transition:opacity .28s ease .08s,transform .36s cubic-bezier(.22,1,.36,1);
}
.pd-product .pd-step.active .pd-step-panel{
  opacity:1;
  pointer-events:auto;
  transform:none;
}
.pd-product .pd-step:not(.active) .pd-step-panel{
  opacity:0;
  pointer-events:none;
  height:0;
  padding:0;
  overflow:hidden;
}
.pd-product .pd-step-panel--plain{
  grid-template-columns:1fr;
}

.pd-product .pd-step-media{
  border-radius:var(--radius-sm) 0 0 var(--radius-sm);
  background:var(--gradient-2);
  overflow:hidden;
  min-height:220px;
  display:flex;
  align-items:center;
  justify-content:center;
}
.pd-product .pd-step-media img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}

.pd-product .pd-step-main{min-width:0;display:flex;flex-direction:column; padding:40px var(--space-card);}
.pd-product .pd-step-head{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:10px 12px;
  margin-bottom:14px;
  
}

.pd-product .pd-step-num{
  width:28px;
  height:28px;
  border-radius:6px;
  background:rgba(0,87,156,0.10);
  color:var(--color-primary);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-family:var(--font-sans);
  font-size:var(--font-size-base);
  font-weight:700;
  line-height:1;
  flex-shrink:0;
}
.pd-product .pd-step-num--muted{
  background:var(--color-border);
  color:var(--color-text-secondary);
}
.pd-product .pd-step-name{
  color:var(--color-title);
  font-family:var(--font-sans);
  font-size:var(--font-size-lg);
  font-weight:700;
  line-height:1.35;
}
.pd-product .pd-step-badges{display:inline-flex;align-items:center;flex-wrap:wrap;gap:6px}

.pd-product .pd-badge{
  display:inline-flex;
  align-items:center;
  height:22px;
  padding:0 10px;
  border-radius:var(--radius-pill);
  font-family:var(--font-sans);
  font-size:var(--font-size-2xs);
  font-weight:700;
  letter-spacing:.04em;
  line-height:1;
  border:1px solid transparent;
  transition:background .2s ease,border-color .2s ease,color .2s ease;
}
.pd-product .pd-badge--req{

  background: rgba(0, 177, 198, 0.03);
  color: #00B1C6;
  border: 1px solid rgba(0, 177, 198, 0.2828);
}
.pd-product .pd-badge--core{
  background: rgba(0, 87, 156, 0.0311);
  border: 1px solid rgba(0, 87, 156, 0.3);
  color:var(--color-text);
 
}
.pd-product .pd-badge--ver{
  background:#fff;
  color:var(--t3);
  border-color:var(--color-border);
}
.pd-product .pd-badge--opt{
  background:var(--color-border);
  color:var(--t3);
}
.pd-product .pd-step:not(.active):hover .pd-badge--core,
.pd-product .pd-step:not(.active):hover .pd-badge--ver{
  border-color:var(--color-primary);
  color:var(--color-primary);
}

.pd-product .pd-step-desc{
  margin:0 0 14px;
  color:var(--color-text-secondary);
  font-family:var(--font-sans);
  font-size:var(--font-size-body);
  line-height:1.6;
}
.pd-product .pd-step-tags{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-bottom:18px;
}
.pd-product .pd-tag{
  display:inline-flex;
  align-items:center;
  height:28px;
  padding:0 12px;
  border-radius:var(--radius-pill);
  border:1px solid rgba(0,87,156,0.22);
  background:#fff;
  color:var(--color-text);
  font-family:var(--font-sans);
  font-size:var(--font-size-caption);
  font-weight:600;
  letter-spacing:.02em;
  transition:background .2s ease,border-color .2s ease,color .2s ease;
}
.pd-product .pd-tag:hover{
  background:rgba(0,87,156,0.08);
  border-color:var(--color-primary);
  color:var(--color-primary);
}

.pd-product .pd-step-actions{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px;
  margin-top:auto;
}
.pd-product .pd-btn-dl{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:41px;
  min-height:41px;
  padding:0 22px;
  border-radius:var(--radius-pill);
  background:var(--color-primary);
  color:#fff;
  font-family:var(--font-sans);
  font-size:var(--font-size-body);
  font-weight:600;
  line-height:1;
  transition:background .2s ease,transform .2s ease,box-shadow .2s ease;
}
.pd-product .pd-btn-dl svg{width:14px;height:14px}
.pd-product .pd-btn-dl:hover{
  background:var(--color-primary-dim);
  transform:translateY(-1px);
  box-shadow:0 8px 20px -10px rgba(0,87,156,.55);
}
.pd-product .pd-btn-note{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:41px;
  min-height:41px;
  padding:0 18px;
  border-radius:var(--radius-pill);
  border:1.5px solid rgba(0,87,156,0.35);
  background:#fff;
  color:var(--color-primary);
  font-family:var(--font-sans);
  font-size:var(--font-size-body);
  font-weight:600;
  line-height:1;
  transition:background .2s ease,border-color .2s ease,color .2s ease;
}
.pd-product .pd-btn-note-ic{
  width:22px;
  height:22px;
  border-radius:50%;
  border:1.5px solid currentColor;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  flex-shrink:0;
}
.pd-product .pd-btn-note-ic svg{width:10px;height:10px}
.pd-product .pd-btn-note:hover{
  background:rgba(0,87,156,0.07);
  border-color:var(--color-primary);
  color:var(--color-primary-dim);
}

.pd-product .pd-opt-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(140px,1fr));
  gap:10px;
  margin-top:4px;
}
.pd-product .pd-opt-item{
  display:flex;
  align-items:center;
  gap:10px;
  min-width:0;
  padding:10px 12px;
  border:1px solid var(--color-border);
  border-radius:var(--radius-sm);
  background:#fff;
  color:var(--color-title);
  font-family:var(--font-sans);
  font-size:var(--font-size-caption);
  font-weight:700;
  line-height:1.4;
  transition:border-color .2s ease,box-shadow .2s ease,color .2s ease;
}
.pd-product .pd-opt-item:hover{
  border-color:var(--color-primary);
  color:var(--color-primary);
  box-shadow:var(--shadow-selected);
}
.pd-product .pd-opt-icon{
  width:32px;
  height:32px;
  border-radius:var(--radius-sm);
  background:rgba(0,87,156,0.08);
  color:var(--color-primary);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  flex-shrink:0;
}
.pd-product .pd-opt-icon svg{width:16px;height:16px}

/* ═══ HCI / AIOS evaluate 卡片区 ═══ */
.pd-eval{
  background: #F7F9FC;
  overflow:hidden;
}
.pd-eval .product-inner{max-width:var(--max-width,1440px)}
.pd-eval-stage{
  position:relative;
  margin-top:var(--space-card);
  padding:var( --space-module);
  background: #E2EDFA;
  overflow:hidden;
}
.pd-eval-stage::before{
  content:'';
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(rgba(0,87,156,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,87,156,0.06) 1px, transparent 1px);
  background-size:48px 48px;
  pointer-events:none;
  opacity:.7;
}
.pd-eval-card{
  position:relative;
  z-index:1;
  margin:0 auto;
  padding:var(--space-module) var(--space-module);
  background:#fff;
  border:1px solid var(--color-border);
  border-radius:var(--radius-md);
  text-align:center;
  box-sizing:border-box;
}
.pd-eval-title{
  margin:0 0 var(--space-card);
  color:var(--color-title);
  font-family:var(--font-sans);
  font-size:var(--font-size-3xl);
  font-weight:600;
  letter-spacing:-.02em;
  line-height:1.3;
}
.pd-eval-text{
  margin:0 auto var(--space-module);
  max-width:820px;
  color:var(--color-text-secondary);
  font-family:var(--font-sans);
  font-size:var(--font-size-body);
  line-height:1.7;
}
.pd-eval-feats{
  list-style:none;
  display:grid;
  grid-template-columns:1fr 1fr;
  grid-template-rows:repeat(3,auto);
  grid-auto-flow:column;
  gap:14px 40px;
  text-align:left;
  margin:0 0 var(--space-module);
  padding:0;
}
.pd-eval-feat{
  position:relative;
  padding-left:18px;
  color:var(--color-text-secondary);
  font-family:var(--font-sans);
  font-size:var(--font-size-body);
  line-height:1.6;
}
.pd-eval-feat::before{
  content:'';
  position:absolute;
  left:0;
  top:.55em;
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--color-primary);
}
.pd-eval-feat strong{
  color:var(--color-title);
  font-weight:700;
}
.pd-eval-actions{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  align-items:center;
  gap:14px;
}
.pd-eval-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:9px;
  height:41px;
  min-height:41px;
  padding:4px 20px 4px 4px;
  border-radius:var(--radius-pill);
  background:var(--color-primary);
  color:#fff;
  font-family:var(--font-sans);
  font-size:var(--font-size-body);
  font-weight:600;
  line-height:1;
  border:none;
  box-sizing:border-box;
  box-shadow:0 10px 28px -12px rgba(0,87,156,0.55);
  transition:transform .22s ease,box-shadow .22s ease,background .22s ease;
}
.pd-eval-btn-ic{
  width:33px;
  height:33px;
  border-radius:50%;
  background:#fff;
  color:var(--color-primary);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  flex-shrink:0;
}
.pd-eval-btn-ic svg{width:14px;height:14px;display:block}
.pd-eval-btn:hover{
  background:var(--color-primary-dim);
  color:#fff;
  transform:translateY(-2px);
  box-shadow:0 14px 32px -12px rgba(0,87,156,0.6);
}
.pd-eval-btn--ghost{
  padding:0 22px;
  background:#fff;
  color:var(--color-primary);
  border:1.5px solid rgba(0,87,156,0.35);
  box-shadow:none;
}
.pd-eval-btn--ghost:hover{
  background:rgba(0,87,156,0.07);
  border-color:var(--color-primary);
  color:var(--color-primary-dim);
  box-shadow:none;
  transform:translateY(-2px);
}

/* Responsive */
@media(max-width:900px){
  .dl-grid{grid-template-columns:1fr}
  .resources-grid{grid-template-columns:1fr}
  .evaluate-panel{grid-template-columns:1fr}
  .version-strip{flex-direction:column;gap:10px;align-items:center}
  .vs-sep{display:none}
  .nbutt{
      margin: 10px 0 0 !important;
      display: block;
  }
  .pd-product .pd-step-panel{
    grid-template-columns:1fr;
  }
  .pd-product .pd-step-media{
    min-height:180px;
    max-height:220px;
  }
  .pd-product .pd-step-rail{width:8px}
  .pd-eval-feats{grid-template-columns:1fr;grid-template-rows:none;grid-auto-flow:row;gap:12px}
  .pd-eval-stage{padding:var(--space-card)}
  .pd-eval-card{padding:var(--space-module) var(--space-card)}
}
@media(max-width:640px){
  .pd-product .pd-product-head{margin-bottom:var(--space-module)}
  .pd-product .pd-install-title{font-size:var(--font-size-base);gap:10px}
  .pd-product .pd-install-icon{width:32px;height:32px}
  .pd-product .pd-step-name{font-size:var(--font-size-base)}
  .pd-product .pd-step-bar{padding:12px 14px;min-height:56px;gap:8px}
  .pd-product .pd-step-panel{padding:var(--space-card)}
  .pd-product .pd-step-actions{flex-direction:column;align-items:stretch}
  .pd-product .pd-btn-dl,.pd-product .pd-btn-note{width:100%}
  .pd-product .pd-opt-grid{grid-template-columns:1fr 1fr}
  .pd-eval-title{font-size:var(--font-size-subtitle)}
  .pd-eval-actions{flex-direction:column;align-items:stretch}
  .pd-eval-btn,.pd-eval-btn--ghost{width:100%}
}
@media(max-width:480px){
  .product-header{flex-wrap:wrap;gap:8px}
  .product-header .product-tag{margin-left:0}
  .product-title{font-size:var(--font-size-subtitle)}
  .product-subtitle{font-size:var(--font-size-body);margin-bottom:20px}
  .dl-grid{gap:10px}
  .dl-card{padding:14px;gap:8px}
  .dl-card [style*="font-size:14px"][style*="font-weight:700"]{font-size:12px!important}
  .dl-card-name{font-size:12px}
  .version-strip{padding:8px 12px;gap:8px}
  .resources-section{padding:var(--space-section) var(--space-gutter)}
  .resources-grid{gap:12px}
  .res-icon{height:140px}
  .res-card h3{font-size:var(--font-size-xl);padding:16px 16px 0}
  .res-card p{padding:6px 16px 0;font-size:var(--font-size-body)}
  .res-card-link{padding:12px 16px 16px;font-size:var(--font-size-caption)}
  .evaluate-panel{padding:20px;gap:16px;grid-template-columns:1fr}
  .evaluate-headline{font-size:var(--font-size-subtitle)}
  .evaluate-btn{padding:12px 20px;font-size:var(--font-size-sm)}
  .agreement-global-inner{font-size:10px;padding:8px 14px}
  .pd-product .pd-opt-grid{grid-template-columns:1fr}
  .pd-product .step-wrap{gap:10px}
  .pd-product .pd-step-rail{width:6px}
}