:root{--bg: #f8fafc;--surface: #ffffff;--text: #0f172a;--muted: #64748b;--border: #e2e8f0;--brand: #4f46e5;--brand-hover: #4338ca;--brand-soft: #eef2ff;--accent: #0ea5e9;--shadow: 0 22px 50px -12px rgb(15 23 42 / 12%);--radius: 14px;--font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", "Noto Sans TC", sans-serif}*,*:before,*:after{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:var(--font);color:var(--text);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased}a{color:var(--brand);text-decoration:none}a:hover{text-decoration:underline}.wrap{width:min(1120px,100% - 40px);margin-inline:auto}.topbar{position:sticky;top:0;z-index:20;background:#ffffffdb;backdrop-filter:blur(10px);border-bottom:1px solid var(--border)}.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:14px 0}.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.05rem;color:var(--text);text-decoration:none}.brand:hover{text-decoration:none;color:var(--brand)}.brand-icon{width:34px;height:34px;border-radius:10px;object-fit:contain;display:block;flex-shrink:0;box-shadow:0 1px 2px #0f172a0f}.brand-icon--hub{width:72px;height:72px;border-radius:16px;box-shadow:0 4px 14px #0f172a1a}.nav{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.nav a{padding:8px 12px;border-radius:10px;color:var(--muted);font-weight:500;font-size:.92rem;text-decoration:none}.nav a:hover{background:var(--brand-soft);color:var(--brand);text-decoration:none}.lang-switch{display:flex;align-items:center;gap:4px;margin-left:8px;padding-left:12px;border-left:1px solid var(--border)}.lang-switch a{font-size:.8rem;padding:6px 8px;border-radius:8px;color:var(--muted);text-decoration:none}.lang-switch a[aria-current=page]{background:var(--text);color:#fff}.lang-switch a:hover:not([aria-current=page]){background:#f1f5f9;color:var(--text);text-decoration:none}.hero{padding:72px 0 56px;background:radial-gradient(1200px 500px at 10% -10%,#e0e7ff 0%,transparent 55%),radial-gradient(900px 400px at 90% 0%,#e0f2fe 0%,transparent 50%)}.hero-grid{display:grid;gap:40px;align-items:center;grid-template-columns:1.1fr .9fr}@media (max-width: 900px){.hero-grid{grid-template-columns:1fr}}.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:.85rem;font-weight:600;color:var(--brand);letter-spacing:.02em}h1{font-size:clamp(2rem,4vw,2.75rem);line-height:1.15;margin:14px 0 16px;letter-spacing:-.03em}.lead{font-size:1.1rem;color:var(--muted);max-width:52ch;margin:0 0 28px}.actions{display:flex;flex-wrap:wrap;gap:12px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 20px;border-radius:12px;font-weight:600;font-size:.95rem;border:1px solid transparent;cursor:pointer;text-decoration:none;transition:transform .12s ease,box-shadow .12s ease,background .12s ease}.btn:hover{text-decoration:none;transform:translateY(-1px)}.btn-primary{background:var(--brand);color:#fff;box-shadow:0 10px 24px -8px #4f46e58c}.btn-primary:hover{background:var(--brand-hover);color:#fff}.btn-ghost{background:var(--surface);color:var(--text);border-color:var(--border)}.btn-ghost:hover{border-color:#cbd5e1;color:var(--text)}.preview{background:var(--surface);border:1px solid var(--border);border-radius:calc(var(--radius) + 4px);box-shadow:var(--shadow);overflow:hidden}.preview-top{display:flex;align-items:center;gap:8px;padding:12px 14px;border-bottom:1px solid var(--border);background:linear-gradient(to bottom,#f8fafc,#fff)}.dot{width:10px;height:10px;border-radius:50%;background:#cbd5e1}.dot:nth-child(1){background:#fb7185}.dot:nth-child(2){background:#fbbf24}.dot:nth-child(3){background:#34d399}.preview-body{padding:22px;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.82rem;line-height:1.55;color:#334155}.preview-body .k{color:#6366f1}.preview-body .s{color:#0d9488}section{padding:56px 0}section.alt{background:#fff;border-block:1px solid var(--border)}h2{font-size:1.65rem;margin:0 0 10px;letter-spacing:-.02em}.section-lead{margin:0 0 36px;color:var(--muted);max-width:70ch}.grid-4{display:grid;gap:18px;grid-template-columns:repeat(4,1fr)}@media (max-width: 960px){.grid-4{grid-template-columns:repeat(2,1fr)}}@media (max-width: 520px){.grid-4{grid-template-columns:1fr}}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:22px;height:100%}.card h3{margin:0 0 10px;font-size:1.05rem}.card p{margin:0;color:var(--muted);font-size:.95rem}.download-panel{background:linear-gradient(120deg,#eef2ff,#ecfeff);border:1px solid #c7d2fe;border-radius:calc(var(--radius) + 6px);padding:32px;display:grid;gap:20px}.download-actions{display:flex;flex-wrap:wrap;gap:12px}footer{padding:36px 0 48px;color:var(--muted);font-size:.9rem;border-top:1px solid var(--border);background:#fff}footer .foot-grid{display:flex;flex-wrap:wrap;gap:16px 28px;justify-content:space-between;align-items:flex-start}.icp-line{margin:20px 0 0;padding-top:20px;border-top:1px solid var(--border);text-align:center;font-size:.8125rem;color:var(--muted)}.icp-line a{color:var(--muted);text-decoration:none}.icp-line a:hover{color:var(--text);text-decoration:underline}.hub-card .icp-line{margin-top:28px}.hub{min-height:70vh;display:grid;place-items:center;padding:48px 0}.hub-card{background:var(--surface);border:1px solid var(--border);border-radius:calc(var(--radius) + 8px);box-shadow:var(--shadow);padding:40px;max-width:520px;width:100%;text-align:center}.hub-card h1{margin-top:0}.hub-links{display:flex;flex-direction:column;gap:12px;margin-top:28px}.hub-links a{display:block;padding:14px 18px;border-radius:12px;border:1px solid var(--border);font-weight:600;color:var(--text);text-decoration:none}.hub-links a:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-soft)}