:root{color-scheme:light;--ink: #151515;--text: #242424;--muted: #6d6d6d;--paper: #f3f3f1;--surface: #ffffff;--panel: #f8f8f7;--line: #d8d8d3;--line-strong: #b7b7b0;--solidworks-red: #d71920;--selection: #2f5f9e;--shadow: 0 22px 58px rgba(0, 0, 0, .12)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--text);background:var(--paper);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Microsoft YaHei,Arial,sans-serif;letter-spacing:0;overflow-x:hidden}a{color:inherit;text-decoration:none}button{font:inherit}.shell{min-height:100vh;background:linear-gradient(90deg,rgba(0,0,0,.035) 1px,transparent 1px),linear-gradient(180deg,#f7f7f5,#fff 48%,#efefec);background-size:38px 38px,auto}.nav{position:sticky;top:0;z-index:10;display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:68px;padding:12px clamp(18px,4vw,56px);border-bottom:1px solid var(--line);background:#f8f8f7eb;-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px)}.brand{display:inline-flex;align-items:center;gap:12px;min-width:0;font-weight:800}.brand img{width:36px;height:36px;display:block;border:1px solid var(--line);border-radius:6px}.brand-name{display:grid;gap:2px;line-height:1.1}.brand-name span:first-child{font-size:16px}.brand-name span:last-child{color:var(--muted);font-size:12px;font-weight:600}.nav-actions{display:flex;align-items:center;justify-content:flex-end;gap:12px;flex-wrap:wrap}.nav-link{color:#3d3d3d;font-size:14px;font-weight:650}.button{display:inline-flex;align-items:center;justify-content:center;min-height:40px;padding:0 16px;border:1px solid var(--ink);border-radius:6px;font-size:14px;font-weight:800;white-space:nowrap;transition:transform .16s ease,background .16s ease,color .16s ease,box-shadow .16s ease}.button-download{color:#fff;background:var(--ink);box-shadow:inset 0 -2px #ffffff2e}.button-download:hover,.button-download:focus{transform:translateY(-1px);background:#000;box-shadow:0 12px 26px #00000029}.button-secondary{color:var(--ink);border-color:var(--line-strong);background:#fff}.button-secondary:hover,.button-secondary:focus{border-color:var(--ink)}.button-large{min-height:48px;padding:0 22px;font-size:15px}.compact-download{min-height:32px;padding:0 12px;font-size:12px}.hero{display:grid;grid-template-columns:minmax(280px,.78fr) minmax(620px,1.42fr);gap:clamp(24px,4vw,52px);align-items:center;min-height:calc(100vh - 68px);padding:clamp(36px,6vw,76px) clamp(18px,4vw,56px) clamp(32px,6vw,64px)}.hero>*{min-width:0}.hero-copy{max-width:640px;min-width:0}.eyebrow{display:inline-flex;align-items:center;gap:10px;margin-bottom:18px;color:#333;font-size:14px;font-weight:850}.eyebrow:before{content:"";width:34px;height:3px;border-radius:999px;background:var(--solidworks-red)}h1{margin:0;max-width:680px;font-size:clamp(38px,5.4vw,72px);line-height:1.02;font-weight:900;letter-spacing:0;overflow-wrap:anywhere}h1 span{display:block}.lead{margin:24px 0 0;max-width:600px;color:#444;font-size:clamp(17px,1.7vw,21px);line-height:1.68;overflow-wrap:anywhere}.hero-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-top:28px}.meta-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}.meta-row span{min-height:29px;padding:6px 10px;border:1px solid var(--line);border-radius:6px;color:#3f3f3f;background:#ffffffbd;font-size:12px;font-weight:700}.cad-workbench{overflow:hidden;max-width:100%;min-width:0;border:1px solid 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var(--line);border-radius:5px;color:#252525;background:#fff;font-size:13px;font-weight:750}.command-manager button.active{border-color:var(--ink);color:#fff;background:var(--ink)}.workbench-grid{display:grid;grid-template-columns:minmax(150px,.56fr) minmax(320px,1.2fr) minmax(240px,.8fr);min-height:520px;min-width:0}.feature-tree,.property-panel{min-width:0;background:var(--panel)}.feature-tree{border-right:1px solid var(--line)}.property-panel{border-left:1px solid var(--line)}.feature-tree h2,.property-panel h2{margin:0;min-height:38px;padding:10px 12px;border-bottom:1px solid var(--line);color:#303030;font-size:13px;font-weight:900}.feature-tree ul{display:grid;gap:2px;margin:0;padding:10px 8px;list-style:none}.feature-tree li{display:flex;align-items:center;gap:8px;min-height:30px;padding:0 8px;border:1px solid transparent;border-radius:4px;color:#343434;font-size:13px;font-weight:650}.feature-tree li span{width:12px;height:12px;border:1px solid var(--line-strong);border-radius:2px;background:#fff}.feature-tree li.active{border-color:#c9c9c4;background:#fff}.feature-tree li.done span{border-color:var(--solidworks-red);background:var(--solidworks-red)}.model-viewport{position:relative;overflow:hidden;min-width:0;display:grid;grid-template-rows:auto minmax(310px,1fr) auto;padding:14px;background:linear-gradient(90deg,rgba(0,0,0,.055) 1px,transparent 1px),linear-gradient(0deg,rgba(0,0,0,.055) 1px,transparent 1px),#fff;background-size:28px 28px}.viewport-toolbar{position:relative;z-index:2;display:flex;gap:6px;align-items:center}.viewport-toolbar span,.dimension{min-height:24px;padding:4px 8px;border:1px solid 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var(--line-strong);border-radius:5px;color:#202020;background:#f3f3f1;font-size:12px;font-weight:900}.feature h3{margin:0 0 10px;color:var(--ink);font-size:19px;line-height:1.3}.feature p{margin:0;color:var(--muted);font-size:14px;line-height:1.65;overflow-wrap:anywhere}.flow{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1px;overflow:hidden;border:1px solid var(--line);border-radius:8px;background:var(--line)}.flow-step{min-height:184px;padding:24px;background:#fff}.flow-step span{color:var(--solidworks-red);font-size:13px;font-weight:900}.flow-step h3{margin:15px 0 10px;color:var(--ink);font-size:20px}.flow-step p{margin:0;color:var(--muted);font-size:14px;line-height:1.6;overflow-wrap:anywhere}.download-section{background:#fff}.download-dock{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:24px;align-items:center;padding:clamp(26px,4vw,42px);border:1px solid var(--line-strong);border-radius:8px;background:linear-gradient(90deg,rgba(0,0,0,.04) 1px,transparent 1px),#f7f7f5;background-size:30px 30px}.download-label{display:inline-flex;align-items:center;min-height:26px;margin-bottom:14px;padding:0 9px;border:1px solid var(--line-strong);border-radius:5px;color:#303030;background:#fff;font-size:12px;font-weight:900;text-transform:uppercase}.download-dock h2{font-size:clamp(28px,3.8vw,44px)}.download-dock p{margin:12px 0 0;max-width:760px;color:var(--muted);line-height:1.6;overflow-wrap:anywhere}.download-actions{display:flex;flex:0 0 auto;flex-direction:column;align-items:center;gap:10px}.alternate-download{color:var(--muted);font-size:12px;text-underline-offset:3px}.alternate-download:hover,.alternate-download:focus{color:var(--ink)}.footer{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:16px;padding:24px clamp(18px,4vw,56px);color:var(--muted);border-top:1px solid var(--line);background:#fff;font-size:13px}.footer-left{justify-self:start}.footer-center{justify-self:center;text-align:center}.footer-right{justify-self:end;text-align:right}@keyframes gear-spin{to{transform:rotate(360deg)}}@keyframes tool-pulse{0%,to{box-shadow:0 0 #0000003d}50%{box-shadow:0 0 0 7px #0000}}@keyframes cursor-blink{50%{opacity:0}}@media(max-width:1220px){.hero{grid-template-columns:1fr;min-height:auto}}@media(max-width:920px){.workbench-grid{grid-template-columns:1fr;min-height:auto}.feature-tree,.property-panel{border:0}.feature-tree{border-bottom:1px solid var(--line)}.property-panel{border-top:1px solid var(--line)}.feature-grid,.flow{grid-template-columns:repeat(2,minmax(0,1fr))}.download-dock{grid-template-columns:1fr}}@media(max-width:680px){.nav{align-items:flex-start;flex-direction:column}.nav-actions{justify-content:flex-start}.nav-link{display:none}.hero{padding-top:30px}h1{font-size:clamp(34px,11vw,42px)}.lead{font-size:16px}.workbench-titlebar{grid-template-columns:auto minmax(0,1fr)}.compact-download{grid-column:1 / -1;width:100%}.command-manager{grid-template-columns:repeat(2,minmax(0,1fr))}.command-manager-label{grid-column:1 / -1;min-height:24px;padding:0}.feature-grid,.flow{grid-template-columns:1fr}.section-heading{align-items:flex-start;flex-direction:column}.footer{grid-template-columns:1fr;justify-items:center;text-align:center}.footer-left,.footer-center,.footer-right{justify-self:center;text-align:center}.button{width:100%}}:root{--ink: #1d1d1f;--text: #1d1d1f;--muted: #6e6e73;--paper: #f5f5f7;--surface: #ffffff;--panel: #fbfbfd;--line: rgba(29, 29, 31, .12);--line-strong: rgba(29, 29, 31, .22);--solidworks-red: #ff453a;--selection: #0071e3;--shadow: 0 24px 60px rgba(26, 36, 58, .12), 0 2px 8px rgba(26, 36, 58, .06)}body{background:var(--paper);font-family:-apple-system,BlinkMacSystemFont,SF Pro Display,SF Pro Text,PingFang SC,Microsoft YaHei,sans-serif;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}.shell{overflow:clip;background:radial-gradient(circle at 76% 7%,rgba(162,198,255,.46),transparent 23rem),radial-gradient(circle at 17% 30%,rgba(255,205,223,.32),transparent 25rem),linear-gradient(180deg,#fff 0,#fbfbfd 39%,#f5f5f7)}.nav{min-height:52px;padding:8px clamp(20px,6vw,104px);border-bottom-color:#00000014;background:#ffffffb8;box-shadow:0 1px #fffc;backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px)}.brand{gap:9px;font-weight:700}.brand img{width:30px;height:30px;border:0;border-radius:8px;box-shadow:0 1px 3px #00000024}.brand-name{gap:1px}.brand-name span:first-child{font-size:15px;letter-spacing:-.02em}.brand-name span:last-child{color:#86868b;font-size:10px;font-weight:600}.nav-actions{gap:22px}.nav-link{color:#424245;font-size:12px;font-weight:500;transition:color .2s ease}.nav-link:hover,.nav-link:focus{color:var(--selection)}.button{min-height:36px;padding:0 17px;border:0;border-radius:980px;font-size:14px;font-weight:600;letter-spacing:-.01em;transition:transform .2s ease,background .2s ease,box-shadow .2s ease}.button:focus-visible,.nav-link:focus-visible,.alternate-download:focus-visible{outline:3px solid rgba(0,113,227,.35);outline-offset:3px}.button-download{background:#1d1d1f;box-shadow:0 1px 1px #00000038,inset 0 1px #ffffff29}.button-download:hover,.button-download:focus{transform:scale(1.02);background:#000;box-shadow:0 8px 22px #0003,inset 0 1px #ffffff29}.button-secondary{border:1px solid rgba(0,113,227,.15);color:var(--selection);background:#ffffffb8;box-shadow:0 1px 2px #0000000a}.button-secondary:hover,.button-secondary:focus{border-color:#0071e34d;background:#fff}.button-large{min-height:48px;padding:0 23px;font-size:16px}.nav-download{min-height:32px;padding:0 14px;font-size:12px}.hero{grid-template-columns:minmax(300px,.78fr) minmax(600px,1.34fr);gap:clamp(28px,5vw,76px);min-height:calc(100vh - 52px);max-width:1540px;margin:0 auto;padding:clamp(56px,8vw,120px) clamp(20px,6vw,104px) clamp(68px,8vw,128px)}.hero-copy{max-width:560px}.eyebrow{margin-bottom:16px;color:#6e6e73;font-size:14px;font-weight:600}.eyebrow:before{width:7px;height:7px;background:var(--selection);box-shadow:0 0 0 5px #0071e31f}h1{max-width:620px;font-size:clamp(44px,5vw,78px);line-height:1.055;font-weight:700;letter-spacing:-.055em}h1 span:last-child{color:transparent;background:linear-gradient(100deg,#06c,#5e5ce6 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span:first-child{background:#ff453a}.window-controls span:nth-child(2){background:#febc2e}.window-controls span:last-child{background:#28c840}.workbench-title{color:#6e6e73;font-size:12px;font-weight:600;text-align:center}.compact-download{min-height:30px;padding:0 13px;font-size:11px}.command-manager{gap:4px;min-height:56px;padding:8px 14px;border-bottom-color:#1d1d1f14;background:#f6f7fbbf}.command-manager-label{color:#86868b;font-size:10px;font-weight:600}.command-manager button{min-height:38px;border:0;border-radius:9px;color:#515154;background:transparent;font-size:12px;font-weight:600}.command-manager button.active{border:0;color:#fff;background:var(--selection);box-shadow:0 3px 9px #0071e347}.workbench-grid{grid-template-columns:minmax(142px,.52fr) minmax(330px,1.3fr) minmax(220px,.74fr);min-height:518px}.feature-tree,.property-panel{background:#f9fafdb3}.feature-tree{border-right-color:#1d1d1f14}.property-panel{border-left-color:#1d1d1f14}.feature-tree h2,.property-panel h2{min-height:42px;padding:13px 14px;border-bottom-color:#1d1d1f14;color:#86868b;font-size:10px;font-weight:700;letter-spacing:.02em;text-transform:uppercase}.feature-tree ul{gap:5px;padding:12px 9px}.feature-tree li{min-height:34px;gap:7px;padding:0 8px;border-radius:8px;color:#515154;font-size:12px;font-weight:500}.feature-tree li span{width:10px;height:10px;border-color:#d1d1d6;border-radius:50%;background:#fff}.feature-tree li.active{border-color:#0071e31f;color:#06c;background:#0071e317}.feature-tree li.done span{border-color:#34c759;background:#34c759}.model-viewport{padding:15px;background:radial-gradient(circle at 50% 47%,rgba(150,188,255,.38),transparent 39%),linear-gradient(140deg,#e9edf6,#fdfdff 47%,#e7eaf4)}.model-viewport:before{position:absolute;top:0;right:0;bottom:0;left:0;background-image:linear-gradient(rgba(70,93,132,.055) 1px,transparent 1px),linear-gradient(90deg,rgba(70,93,132,.055) 1px,transparent 1px);background-size:30px 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