:root{--bg:#f8fafc;--surface:#fff;--text:#0f172a;--muted:#475569;--primary:#2563eb;--primary-dark:#1e40af;--border:#e2e8f0;--hero:linear-gradient(135deg, #eff6ff 0%, #f8fafc 55%, #eef2ff 100%);font-family:Segoe UI,PingFang SC,Microsoft YaHei,sans-serif}*{box-sizing:border-box}html{scrollbar-width:thin;scrollbar-color:#cbd5e1 transparent}html::-webkit-scrollbar{width:8px;height:8px}html::-webkit-scrollbar-track{background:0 0}html::-webkit-scrollbar-thumb{background:#cbd5e1 padding-box padding-box;border:2px solid #0000;border-radius:999px}html::-webkit-scrollbar-thumb:hover{background:#94a3b8 padding-box padding-box}html::-webkit-scrollbar-corner{background:0 0}body{min-height:100dvh;color:var(--text);background:var(--bg);margin:0}a{color:var(--primary);text-decoration:none}.site-shell{flex-direction:column;min-height:100dvh;display:flex}.site-main{flex:1 0 auto}.site-header{background:var(--surface);border-bottom:1px solid var(--border);z-index:10;justify-content:space-between;align-items:center;padding:16px 32px;display:flex;position:sticky;top:0}.brand{color:var(--text);font-size:18px;font-weight:700}.site-header nav{gap:20px;display:flex}.site-header nav a{color:var(--muted)}.site-header nav a:hover{color:var(--primary)}.site-header nav a.active{color:var(--primary);font-weight:600}.hero{background:var(--hero);text-align:center;padding:72px 32px}.hero h1{margin:0 0 16px;font-size:clamp(32px,5vw,48px)}.hero p{max-width:640px;color:var(--muted);margin:0 auto 28px;font-size:18px;line-height:1.6}.hero-actions{flex-wrap:wrap;justify-content:center;gap:12px;display:flex}.btn{cursor:pointer;border:none;border-radius:10px;padding:12px 22px;font-weight:600;display:inline-block}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-dark)}.btn-secondary{color:var(--primary);border:1px solid var(--primary);background:#fff}.showcase{max-width:1120px;margin:0 auto;padding:0 24px 56px}.showcase-heading{text-align:center;margin:0 0 8px;font-size:clamp(24px,3vw,32px)}.showcase-lead{text-align:center;max-width:560px;color:var(--muted);margin:0 auto 32px;line-height:1.6}.showcase-grid{grid-template-columns:repeat(2,minmax(0,1fr));align-items:stretch;gap:24px;display:grid}.showcase-card{background:var(--surface);border:1px solid var(--border);border-radius:14px;flex-direction:column;height:100%;margin:0;display:flex;overflow:hidden;box-shadow:0 4px 24px #0f172a0f}.showcase-image-btn{border:none;border-bottom:1px solid var(--border);cursor:zoom-in;text-align:left;background:#f1f5f9;flex:auto;width:100%;margin:0;padding:0;display:block;position:relative}.showcase-image-btn img{width:100%;height:auto;display:block}.showcase-image-btn:hover img,.showcase-image-btn:focus-visible img{opacity:.92}.showcase-image-btn:focus-visible{outline:2px solid var(--primary);outline-offset:-2px}.showcase-zoom-hint{color:#fff;opacity:0;pointer-events:none;background:#0f172ab8;border-radius:6px;padding:4px 10px;font-size:12px;transition:opacity .2s;position:absolute;bottom:12px;right:12px}.showcase-image-btn:hover .showcase-zoom-hint,.showcase-image-btn:focus-visible .showcase-zoom-hint{opacity:1}.showcase-card figcaption{flex-shrink:0;margin-top:auto;padding:16px 20px 20px}.showcase-card h3{margin:0 0 6px;font-size:17px}.showcase-card p{color:var(--muted);margin:0;font-size:14px;line-height:1.5}@media (max-width:720px){.showcase-grid{grid-template-columns:1fr}}.lightbox-overlay{z-index:100;cursor:zoom-out;background:#0f172ad1;justify-content:center;align-items:center;padding:24px;display:flex;position:fixed;inset:0}.lightbox-close{color:#fff;cursor:pointer;background:#ffffff26;border:none;border-radius:8px;width:40px;height:40px;font-size:28px;line-height:1;position:absolute;top:16px;right:20px}.lightbox-close:hover{background:#ffffff40}.lightbox-content{cursor:default;flex-direction:column;align-items:center;max-width:min(1200px,100%);max-height:calc(100vh - 48px);margin:0;display:flex}.lightbox-content img{border-radius:8px;width:auto;max-width:100%;height:auto;max-height:calc(100vh - 120px);display:block;box-shadow:0 8px 40px #00000059}.lightbox-content figcaption{color:#e2e8f0;text-align:center;margin-top:12px;font-size:15px}.features{grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px;max-width:1080px;margin:0 auto;padding:48px 24px 64px;display:grid}.feature-card{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:24px}.feature-card h3{margin:0 0 8px}.feature-card p{color:var(--muted);margin:0;line-height:1.5}.page{max-width:800px;margin:0 auto;padding:48px 24px 80px}.page h1{margin-top:0}.download-grid{gap:16px;margin-top:24px;display:grid}.download-card{background:var(--surface);border:1px solid var(--border);border-radius:12px;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;padding:20px;display:flex}.form{gap:14px;margin-top:20px;display:grid}.form label{color:var(--muted);gap:6px;font-size:14px;display:grid}.form input,.form textarea{border:1px solid var(--border);border-radius:8px;padding:10px 12px;font-size:15px}.success{color:#15803d;background:#f0fdf4;border:1px solid #bbf7d0;border-radius:8px;padding:12px}.error{color:#b91c1c}.hint{color:var(--muted);font-size:14px}.site-footer{text-align:center;color:var(--muted);border-top:1px solid var(--border);background:var(--bg);flex-shrink:0;margin-top:auto;padding:32px;font-size:14px}.license-page .lead{color:var(--muted);max-width:720px;font-size:18px;line-height:1.6}.license-sections{gap:16px;max-width:760px;margin-top:24px;display:grid}.license-section-card{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:20px 24px}.license-section-card h2{margin:0 0 12px;font-size:20px}.license-section-card p{color:var(--muted);white-space:pre-wrap;margin:0;line-height:1.7}