:root{--bg: #fff;--ink: #111827;--muted: #6b7280;--line: #e5e7eb;--soft: #f9fafb;--card: #fff;--emerald: #059669;--emerald-hover: #047857;--emerald-soft: #ecfdf5;--radius: 16px;--shadow: 0 1px 2px rgb(17 24 39 / 6%), 0 8px 24px rgb(17 24 39 / 4%);--font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;--max: 1080px}*,*:before,*:after{box-sizing:border-box}html{color-scheme:light;scroll-behavior:smooth}body{margin:0;font-family:var(--font);font-size:16px;line-height:1.6;color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased}img{max-width:100%;height:auto}a{color:inherit}.wrap{width:min(100% - 40px,var(--max));margin-inline:auto}.brand-accent{color:var(--emerald)}.nav{position:sticky;top:0;z-index:10;background:#ffffffe0;backdrop-filter:saturate(1.4) blur(12px);border-bottom:1px solid var(--line)}.nav-inner{display:flex;align-items:center;gap:20px;height:64px}.logo{display:flex;align-items:center;gap:10px;font-weight:700;text-decoration:none;letter-spacing:-.02em}.logo img{width:36px;height:36px;border-radius:9px}.nav-links{display:flex;gap:20px;margin-left:auto;font-size:14px;color:var(--muted)}.nav-links a{text-decoration:none}.nav-links a:hover{color:var(--ink)}.nav .btn{margin-left:8px}.hero{padding:72px 0 56px;text-align:center}.eyebrow{display:inline-flex;align-items:center;gap:8px;margin:0 0 18px;padding:6px 12px;border:1px solid var(--line);border-radius:999px;background:var(--soft);color:var(--muted);font-size:13px}.hero h1{margin:0 auto 16px;max-width:18em;font-size:clamp(32px,6vw,52px);line-height:1.15;letter-spacing:-.04em;font-weight:700}.lead{margin:0 auto 32px;max-width:36em;color:var(--muted);font-size:18px}.hero-actions{display:flex;flex-direction:column;align-items:center;gap:12px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:0 18px;border-radius:12px;border:1px solid transparent;font:inherit;font-weight:600;text-decoration:none;cursor:pointer}.btn-primary{background:var(--emerald);color:#fff}.btn-primary:hover{background:var(--emerald-hover)}.btn-ghost{background:#fff;border-color:var(--line);color:var(--ink)}.btn-ghost:hover{background:var(--soft)}.hint{margin:0;color:var(--muted);font-size:13px;text-decoration:none}.hint:hover{color:var(--ink)}section h2{margin:0 0 8px;font-size:clamp(24px,4vw,32px);letter-spacing:-.03em}.section-desc{margin:0 0 28px;color:var(--muted)}.features{padding:24px 0 72px}.grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.card{padding:22px;border:1px solid var(--line);border-radius:var(--radius);background:var(--card);box-shadow:var(--shadow)}.card-head{display:flex;align-items:center;gap:12px;margin-bottom:12px}.card h3{margin:0;font-size:22px;letter-spacing:-.03em;line-height:1.3}.card p{margin:0;color:var(--muted);font-size:14px}.icon{display:grid;place-items:center;flex-shrink:0;width:40px;height:40px;border-radius:12px;background:var(--emerald-soft);color:var(--emerald)}.icon svg{width:20px;height:20px}.steps{padding:48px 0;background:var(--soft);border-block:1px solid var(--line)}.step-list{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;padding:0;margin:0;list-style:none;counter-reset:step}.step-list li{counter-increment:step;padding:22px;border-radius:var(--radius);background:#fff;border:1px solid var(--line)}.step-list li:before{content:counter(step);display:grid;place-items:center;width:28px;height:28px;margin-bottom:12px;border-radius:999px;background:var(--ink);color:#fff;font-size:13px;font-weight:700}.step-list h3{margin:0 0 6px;font-size:16px}.step-list p{margin:0;color:var(--muted);font-size:14px}.download{padding:72px 0}.dl-error{margin:0 0 20px;color:#b91c1c;font-size:14px}.dl-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.dl-card{display:flex;flex-direction:column;gap:6px;padding:22px;border:1px solid var(--line);border-radius:var(--radius);background:#fff;text-decoration:none}.dl-card:hover{border-color:#d1d5db}.dl-card.is-detected{border-color:var(--emerald);box-shadow:0 0 0 3px #05966924}.dl-card strong{font-size:16px}.dl-card span{color:var(--muted);font-size:13px}.dl-card b{margin-top:12px;color:var(--emerald);font-size:14px}.faq{padding:0 0 72px}.faq details{border-bottom:1px solid var(--line)}.faq summary{cursor:pointer;padding:16px 0;font-weight:600;list-style:none}.faq summary::-webkit-details-marker{display:none}.faq details p{margin:0 0 16px;color:var(--muted);font-size:14px}.footer{padding:28px 0 40px;border-top:1px solid var(--line);color:var(--muted);font-size:13px}.footer-inner{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}.footer a{color:var(--muted)}@media(max-width:860px){.nav-links{display:none}.grid,.step-list,.dl-grid{grid-template-columns:1fr}.hero{padding-top:48px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}:focus-visible{outline:2px solid var(--emerald);outline-offset:3px}