/* 工业蓝图纸风 · 线框解构软件功能架构 */
:root{
  --bg:#e8f0f6;--sheet:#f4f8fb;--ink:#1a2a3a;--muted:#5a6e80;--line:#9bb4c8;
  --blue:#1e5a8a;--blue-d:#0f3a5c;--cyan:#2a8fbf;--brand:#e6252d;--brand-d:#c81c26;
  --grid:rgba(30,90,138,.12);--max:1160px;--r:4px;
  --mono:"IBM Plex Mono","Cascadia Mono","Consolas","Courier New",monospace;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;font-family:"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;background:
  linear-gradient(var(--grid) 1px,transparent 1px) 0 0/24px 24px,
  linear-gradient(90deg,var(--grid) 1px,transparent 1px) 0 0/24px 24px,
  var(--bg);color:var(--ink);line-height:1.65}
a{color:inherit;text-decoration:none}img{max-width:100%;display:block}button{font:inherit}
.wrap{width:min(100% - 32px,var(--max));margin-inline:auto}
.site-header{position:sticky;top:0;z-index:50;background:rgba(244,248,251,.92);backdrop-filter:none;border-bottom:2px solid var(--blue)}
.nav{display:flex;align-items:center;justify-content:space-between;min-height:64px;gap:16px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-family:var(--mono);font-size:14px;letter-spacing:.04em;color:var(--blue-d)}
.logo-mark{width:34px;height:34px;border:2px solid var(--blue);background:#fff;color:var(--blue);display:grid;place-items:center;font-size:12px;font-family:var(--mono)}
.nav-links{display:flex;align-items:center;gap:6px;flex-wrap:wrap;font-size:13px;font-family:var(--mono)}
.nav-links a{padding:6px 11px;border:1px dashed transparent;color:var(--muted)}
.nav-links a:hover{border-color:var(--line);color:var(--blue);background:#fff}
.nav-links a.t-active{border-color:var(--brand);color:var(--brand);background:#fff5f5;font-weight:700}
.nav-cta{background:var(--brand)!important;color:#fff!important;border:1px solid var(--brand)!important;font-weight:700}
.nav-sep{width:1px;height:16px;background:var(--line);margin:0 4px}
.hero{position:relative;overflow:hidden;color:#e8f4ff;background:
  radial-gradient(ellipse 50% 60% at 88% 30%,rgba(230,37,45,.42) 0%,transparent 55%),
  radial-gradient(ellipse 80% 70% at 15% 35%,#0a3a5c 0%,transparent 55%),
  linear-gradient(165deg,#061420 0%,#0a2840 42%,#0c1c2e 100%)}
.skyline{position:absolute;inset:auto 0 0 0;height:160px;opacity:.28;pointer-events:none;z-index:1}
.hero::before{content:"";position:absolute;inset:0;background:
  linear-gradient(rgba(42,143,191,.08) 1px,transparent 1px) 0 0/28px 28px,
  linear-gradient(90deg,rgba(42,143,191,.08) 1px,transparent 1px) 0 0/28px 28px;pointer-events:none;z-index:1}
.hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:1.05fr .95fr;gap:36px;align-items:center;padding:60px 0 72px}
.kicker{display:inline-flex;align-items:center;gap:8px;padding:5px 12px;border:1px dashed rgba(42,143,191,.5);font-size:11px;color:#8ec8e8;margin-bottom:14px;font-family:var(--mono);letter-spacing:.1em}
.kicker i{width:8px;height:8px;border:1px solid #8ec8e8;background:transparent}
.hero h1{margin:0 0 14px;font-size:clamp(26px,3.8vw,42px);line-height:1.15;font-weight:800;font-family:var(--mono);letter-spacing:-.01em}
.hero-lead{margin:0 0 16px;color:#b8d0e4;font-size:14px;max-width:50ch}
.blueprint-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}
.blueprint-tags span{padding:6px 12px;border:1px dashed rgba(142,200,232,.45);font-size:11px;font-family:var(--mono);color:#c5e0f0;letter-spacing:.04em}
.arch-box{display:grid;grid-template-columns:repeat(3,1fr);gap:6px;margin-bottom:16px;border:1px solid rgba(42,143,191,.35);padding:8px;background:rgba(6,20,32,.35)}
.arch-box div{border:1px dashed rgba(142,200,232,.35);padding:8px;text-align:center;font-family:var(--mono);font-size:10px;color:#9ecae4;letter-spacing:.06em}
.arch-box div b{display:block;font-size:12px;color:#e8f4ff;margin-bottom:2px}
.platform-pills{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px}
.platform-pills button{border:1px dashed rgba(255,255,255,.3);background:rgba(255,255,255,.05);color:#d8e8f4;padding:8px 14px;cursor:pointer;font-family:var(--mono);font-size:12px}
.platform-pills button.is-on{background:#fff;color:var(--blue-d);font-weight:700;border-style:solid;border-color:#fff}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:16px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 20px;font-weight:700;border:1px solid transparent;cursor:pointer;font-family:var(--mono);font-size:13px;letter-spacing:.03em}
.btn-primary{background:var(--brand);color:#fff;border-color:var(--brand)}
.btn-primary:hover{background:var(--brand-d)}
.btn-ghost{background:transparent;color:#fff;border:1px dashed rgba(255,255,255,.4)}
.btn-ghost:hover{border-style:solid;border-color:#8ec8e8;color:#8ec8e8}
.btn-line{background:#fff;color:var(--blue-d);border:1px solid var(--line)}
.btn-line:hover{border-color:var(--brand);color:var(--brand)}
.btn-sm{padding:8px 14px;font-size:12px}
.meta-row{display:flex;flex-wrap:wrap;gap:10px 16px;font-size:11px;color:#8aa4bc;margin-bottom:12px;font-family:var(--mono)}
.update-list{margin:0;padding-left:18px;color:#a8c0d4;font-size:12px;font-family:var(--mono)}
.update-list li{margin:3px 0}
.mock-wrap{position:relative;perspective:1000px}
.mock{background:#0a1c2e;border:2px solid #2a5a7a;padding:12px;box-shadow:0 24px 48px rgba(0,0,0,.4);transform:rotateY(-5deg) rotateX(2deg);position:relative}
.mock::before{content:"DWG-VIEW";position:absolute;top:4px;right:10px;font-size:9px;font-family:var(--mono);color:#4a7a9a;letter-spacing:.12em}
.mock-bar{height:10px;display:flex;gap:5px;margin-bottom:8px}
.mock-bar span{width:8px;height:8px;border:1px solid #4a7a9a;background:transparent}
.mock-screen{display:grid;grid-template-columns:1.3fr .9fr;gap:6px;background:#061018;border:1px dashed #2a5a7a;overflow:hidden;min-height:250px}
.mock-chart{padding:8px;position:relative}
.mock-chart img{width:100%;height:150px;object-fit:cover;opacity:.88;filter:contrast(1.05) saturate(.85)}
.chart-line{position:absolute;left:12px;right:12px;top:48%;height:1px;background:linear-gradient(90deg,transparent,#2a8fbf,transparent);opacity:.6}
.mock-side{border-left:1px dashed #2a5a7a;padding:8px;font-size:10px;font-family:var(--mono)}
.mock-side h4{margin:0 0 6px;color:#8ec8e8;font-size:10px;letter-spacing:.1em;font-weight:600}
.stk{display:flex;justify-content:space-between;padding:4px 0;border-bottom:1px dotted #1a3a50;color:#d0e4f4}
.stk em{font-style:normal;color:#f8a0a0}
.badge-adfree{position:absolute;top:-8px;right:-6px;background:var(--brand);color:#fff;font-size:11px;font-weight:800;padding:9px 12px;transform:rotate(12deg);z-index:2;font-family:var(--mono);border:1px solid #fff}
.section{padding:64px 0}
.section-head{margin-bottom:28px;padding-bottom:12px;border-bottom:2px solid var(--blue)}
.section-head h2{margin:0 0 8px;font-size:clamp(20px,2.8vw,28px);font-family:var(--mono);color:var(--blue-d);letter-spacing:.02em}
.section-head p{margin:0;max-width:64ch;color:var(--muted);font-size:14px}
.section-head .dwg{display:inline-block;margin-bottom:8px;font-family:var(--mono);font-size:11px;color:var(--cyan);letter-spacing:.14em}
.arch-map{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-bottom:32px}
.arch-node{background:var(--sheet);border:1px solid var(--blue);padding:14px 10px;text-align:center;position:relative}
.arch-node::after{content:"";position:absolute;bottom:-9px;left:50%;width:1px;height:8px;background:var(--blue)}
.arch-node:nth-child(n+5)::after{display:none}
.arch-node b{display:block;font-family:var(--mono);font-size:12px;color:var(--blue-d);margin-bottom:4px}
.arch-node span{font-size:11px;color:var(--muted);font-family:var(--mono)}
.platforms{display:grid;gap:14px}
.plat-pc{position:relative;overflow:hidden;display:grid;grid-template-columns:auto 1fr auto;gap:18px;align-items:center;background:#fff;border:2px solid var(--blue);padding:24px;box-shadow:4px 4px 0 rgba(30,90,138,.15)}
.ribbon{position:absolute;top:16px;left:-30px;background:var(--brand);color:#fff;font-size:11px;font-weight:800;padding:5px 38px;transform:rotate(-45deg);font-family:var(--mono)}
.plat-ico{width:56px;height:56px;border:2px solid var(--brand);background:#fff5f5;display:grid;place-items:center;font-size:14px;color:var(--brand);font-family:var(--mono);font-weight:800}
.plat-pc h3{margin:0 0 4px;font-size:18px;font-family:var(--mono);color:var(--blue-d)}
.plat-pc p{margin:0;color:var(--muted);font-size:13px}
.plat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.plat-card{background:var(--sheet);border:1px dashed var(--line);padding:18px;text-align:center}
.plat-card:hover{border-style:solid;border-color:var(--blue)}
.plat-card h3{margin:0 0 6px;font-size:14px;font-family:var(--mono);color:var(--blue-d)}
.plat-card p{margin:0 0 12px;color:var(--muted);font-size:12px}
.feat{display:grid;gap:20px}
.feat-row{display:grid;grid-template-columns:1fr 1fr;gap:0;align-items:center;background:#fff;border:1px solid var(--blue);overflow:hidden}
.feat-row.reverse .feat-media{order:2}
.feat-media{position:relative}
.feat-media img{width:100%;height:250px;object-fit:cover;filter:grayscale(.15) contrast(1.05)}
.feat-media::after{content:"LAYER";position:absolute;top:8px;left:8px;font-family:var(--mono);font-size:10px;color:var(--blue);background:rgba(244,248,251,.9);padding:2px 6px;border:1px dashed var(--blue);letter-spacing:.1em}
.feat-body{padding:28px;border-left:1px dashed var(--line)}
.feat-row.reverse .feat-body{border-left:0;border-right:1px dashed var(--line)}
.feat-body .ref{display:inline-block;margin-bottom:8px;font-family:var(--mono);font-size:10px;color:var(--cyan);letter-spacing:.12em}
.feat-body h3{margin:0 0 8px;font-size:20px;font-family:var(--mono);color:var(--blue-d)}
.feat-body p{margin:0;color:var(--muted);font-size:14px}
.more-feats{margin-top:24px}
.more-feats summary{cursor:pointer;list-style:none;padding:12px 16px;background:#fff;border:1px dashed var(--blue);font-weight:700;font-family:var(--mono);font-size:13px;color:var(--blue-d)}
.more-feats summary::-webkit-details-marker{display:none}
.more-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:12px}
.more-item{background:var(--sheet);border:1px solid var(--line);padding:14px}
.more-item h4{margin:0 0 4px;font-size:13px;font-family:var(--mono);color:var(--blue-d)}
.more-item p{margin:0;font-size:12px;color:var(--muted)}
.community{padding:64px 0;background:linear-gradient(135deg,#3b1a5c 0%,#7a2e1e 55%,#c45a1a 100%)}
.community .section-head{border-bottom-color:rgba(255,255,255,.35)}
.community .section-head h2,.community .section-head p,.community .section-head .dwg{color:#fff}
.community .section-head p{opacity:.9}
.phones{display:grid;grid-template-columns:1fr 1fr;gap:24px;max-width:700px;margin:0 auto}
.phone{background:#0a1420;border:2px solid #2a4a60;border-radius:20px;padding:12px;box-shadow:0 20px 40px rgba(0,0,0,.3);max-width:270px;margin:0 auto;width:100%}
.phone-notch{width:38%;height:7px;background:#2a4a60;border-radius:0 0 8px 8px;margin:0 auto 8px}
.feed{background:#0e1c2a;border:1px dashed #2a5a7a;border-radius:12px;padding:10px;min-height:300px}
.feed-item{padding:8px 0;border-bottom:1px dotted #1a3a50}
.feed-item:last-child{border:0}
.feed-item strong{display:block;font-size:12px;margin-bottom:3px;color:#e8f4ff;font-family:var(--mono)}
.feed-item span{font-size:11px;color:#9ab4c8}
.site-footer{background:#0a1420;color:#b8d0e4;padding:48px 0 24px;border-top:2px solid var(--blue)}
.qr-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:28px}
.qr-box{text-align:center}
.qr-fake{width:80px;height:80px;margin:0 auto 6px;background:
  repeating-linear-gradient(0deg,#1a3a50 0 3px,transparent 3px 6px),
  repeating-linear-gradient(90deg,#1a3a50 0 3px,transparent 3px 6px),#061018;border:1px solid #2a5a7a}
.qr-box span{font-size:11px;color:#8aa4bc;font-family:var(--mono)}
.foot-links{display:flex;flex-wrap:wrap;gap:10px 16px;margin-bottom:14px;font-size:13px;font-family:var(--mono)}
.foot-links a:hover{color:#8ec8e8}
.foot-contact{font-size:12px;color:#8aa4bc;margin-bottom:12px}
.foot-copy{font-size:11px;color:#5a7a90;border-top:1px solid #1a3a50;padding-top:12px;font-family:var(--mono)}
.page-hero{padding:40px 0 14px;background:var(--sheet);border-bottom:2px solid var(--blue)}
.page-hero h1{margin:0 0 8px;font-size:clamp(22px,3vw,32px);font-family:var(--mono);color:var(--blue-d)}
.page-hero p{margin:0;color:var(--muted);max-width:62ch;font-size:14px}
.crumbs{font-size:12px;color:var(--muted);margin-bottom:10px;font-family:var(--mono)}
.crumbs a{color:var(--blue)}
.card-list{display:grid;gap:12px}
.dl-card,.faq-item{background:#fff;border:1px solid var(--blue);padding:20px}
.dl-card{display:grid;grid-template-columns:1fr auto;gap:14px;align-items:center}
.dl-card h2,.faq-item h2{margin:0 0 6px;font-size:16px;font-family:var(--mono);color:var(--blue-d)}
.dl-card p,.faq-item p{margin:0;color:var(--muted);font-size:13px}
.wire-tags{display:flex;gap:6px;flex-wrap:wrap;margin-top:6px}
.wire-tags i{font-style:normal;font-family:var(--mono);font-size:10px;padding:2px 6px;border:1px dashed var(--line);color:var(--blue)}
@media (max-width:900px){
  .hero-grid,.feat-row,.feat-row.reverse .feat-media,.plat-pc,.phones,.plat-grid,.more-grid,.qr-grid,.dl-card,.arch-map,.arch-box{grid-template-columns:1fr}
  .feat-row.reverse .feat-media{order:0}
  .feat-row.reverse .feat-body,.feat-body{border:0}
  .arch-node::after{display:none}
  .plat-pc{justify-items:start}
  .hide-sm{display:none!important}
}

/* perf */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}
.site-header{backdrop-filter:none!important;-webkit-backdrop-filter:none!important}
.feat-media img,.mock-chart img,.feat-row img{content-visibility:auto}
.community,.site-footer{content-visibility:auto;contain-intrinsic-size:800px}
img{height:auto}