:root{--ink:#1f2937;--muted:#667085;--line:#e5e7eb;--bg:#f7f8fa;--card:#fff;--brand:#263241;--accent:#4b5563}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;color:var(--ink);background:#fff;line-height:1.75}a{color:inherit;text-decoration:none}.container{width:min(1180px,92vw);margin:auto}.site-header{position:sticky;top:0;background:rgba(255,255,255,.96);backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--line);z-index:10}.nav-wrap{display:flex;justify-content:space-between;align-items:center;padding:16px 0;gap:18px}.logo{display:flex;align-items:center;gap:10px;font-weight:800}.logo-mark{display:inline-grid;place-items:center;width:44px;height:44px;border-radius:14px;background:var(--brand);color:#fff}.top-nav{display:flex;flex-wrap:wrap;gap:14px;font-size:14px;color:#374151}.search-bar{display:flex;align-items:center;gap:10px;padding:0 0 14px}.search-bar input{flex:1;padding:12px 14px;border:1px solid var(--line);border-radius:12px}.search-bar button,.btn,.lead-form button{padding:12px 18px;border:1px solid var(--brand);border-radius:12px;background:#fff;cursor:pointer}.btn.primary,.lead-form button{background:var(--brand);color:#fff}.hero{padding:70px 0;background:linear-gradient(135deg,#f9fafb,#eef2f5)}.hero-grid,.contact-grid,.two-col{display:grid;grid-template-columns:1.05fr .95fr;gap:36px;align-items:center}.crumb{font-size:14px;color:var(--muted)}h1{font-size:clamp(34px,5vw,58px);line-height:1.15;margin:12px 0}h2{font-size:30px;margin:0 0 14px}h3{font-size:20px;margin:10px 0}.hero-sub,.section-intro{font-size:18px;color:#4b5563}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin:26px 0}.trust-list{padding-left:20px;color:#374151}.section{padding:66px 0}.muted{background:var(--bg)}.card-grid,.review-grid,.scenario-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.card,.review,.steps article,.timeline article,.scenario-grid div,details{background:var(--card);border:1px solid var(--line);border-radius:22px;padding:22px;box-shadow:0 12px 32px rgba(15,23,42,.04)}.tag{display:inline-block;margin:4px 6px 4px 0;padding:4px 10px;border-radius:999px;background:#eef2f7;color:#334155;font-size:13px}.video-card{position:relative;margin:0;border-radius:28px;overflow:hidden;background:#ddd;box-shadow:0 20px 45px rgba(15,23,42,.12)}.video-card img{display:block;width:100%;height:auto}.video-card figcaption{padding:14px 16px;background:#fff;font-size:14px;color:#475467}.play-btn{position:absolute;left:50%;top:43%;transform:translate(-50%,-50%) scale(.9);width:72px;height:72px;border-radius:50%;display:grid;place-items:center;background:rgba(255,255,255,.88);opacity:0;transition:.2s;font-size:28px}.video-card:hover .play-btn,.video-card.show-play .play-btn{opacity:1;transform:translate(-50%,-50%) scale(1)}.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.steps b{font-size:28px;color:#94a3b8}.timeline{display:grid;gap:14px}.timeline article{display:grid;grid-template-columns:150px 1fr;align-items:center}.faq-list{display:grid;gap:12px}summary{cursor:pointer;font-weight:700}.review{display:flex;flex-direction:column;gap:10px}.review small{color:var(--muted)}.contact{background:#111827;color:#fff}.contact p,.contact li{color:#d1d5db}.lead-form{display:grid;gap:12px;background:#fff;padding:24px;border-radius:24px}.lead-form input,.lead-form textarea{width:100%;padding:13px 14px;border:1px solid var(--line);border-radius:12px}.lead-form textarea{min-height:120px}.site-footer{padding:44px 0 24px;background:#f3f4f6}.footer-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px}.copyright{border-top:1px solid var(--line);padding-top:18px;margin-top:26px;color:#667085}.page-hero{padding:56px 0;background:#f8fafc} @media(max-width:860px){.hero-grid,.contact-grid,.two-col,.footer-grid{grid-template-columns:1fr}.card-grid,.review-grid,.scenario-grid,.steps{grid-template-columns:1fr}.timeline article{grid-template-columns:1fr}.top-nav{gap:10px}.search-bar{display:grid;grid-template-columns:1fr}.hero{padding:46px 0}h1{font-size:34px}}