:root{--text:#4b5563;--text-h:#111827;--bg:#fff;--bg-soft:#f2f5fb;--border:#e5e7eb;--accent:#1e3a8a;--accent-hover:#16296b;--accent-bg:#1e3a8a14;--shadow:#11182714 0 8px 24px -6px;--sans:system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;font:16px/1.6 var(--sans);color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*{box-sizing:border-box}body{margin:0}h1,h2,h3{color:var(--text-h);margin:0;font-weight:700}p{margin:0}.container{width:100%;max-width:1080px;margin:0 auto;padding:0 24px}.site-header{z-index:10;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-bottom:1px solid var(--border);background:#ffffffd9;position:sticky;top:0}.header-inner{justify-content:space-between;align-items:center;height:64px;display:flex}.logo{color:var(--text-h);font-size:20px;font-weight:700;text-decoration:none}.btn{cursor:pointer;border:none;border-radius:999px;justify-content:center;align-items:center;font-weight:600;text-decoration:none;transition:transform .15s,box-shadow .15s,background .15s;display:inline-flex}.btn-primary{background:var(--accent);color:#fff;box-shadow:var(--shadow);padding:14px 32px;font-size:17px}.btn-primary:hover{background:var(--accent-hover);transform:translateY(-1px)}.btn-small{background:var(--accent);color:#fff;padding:8px 18px;font-size:14px}.btn-small:hover{background:var(--accent-hover)}.btn-full{width:100%}.hero{background:linear-gradient(180deg, var(--bg-soft) 0%, #fff 100%);text-align:center;padding:96px 0 80px}.hero-inner{flex-direction:column;align-items:center;gap:24px;display:flex}.hero h1{letter-spacing:-.5px;max-width:720px;font-size:48px;line-height:1.25}.hero-sub{max-width:560px;color:var(--text);font-size:18px}.section-title{text-align:center;margin-bottom:40px;font-size:32px}.features{padding:80px 0}.feature-grid{grid-template-columns:repeat(3,1fr);gap:24px;display:grid}.feature-card{border:1px solid var(--border);text-align:left;background:#fff;border-radius:16px;padding:32px 24px;transition:box-shadow .2s,transform .2s}.feature-card:hover{box-shadow:var(--shadow);transform:translateY(-2px)}.feature-icon{margin-bottom:16px;font-size:32px}.feature-card h3{margin-bottom:10px;font-size:20px}.feature-card p{color:var(--text);font-size:15px}.contact{background:var(--bg-soft);padding:80px 0}.contact-inner{max-width:560px}.contact-sub{text-align:center;color:var(--text);margin:-16px 0 32px;display:block}.contact-form{border:1px solid var(--border);background:#fff;border-radius:16px;flex-direction:column;gap:18px;padding:32px;display:flex}.form-row{flex-direction:column;gap:6px;display:flex}.form-row label{color:var(--text-h);font-size:14px;font-weight:600}.form-row input,.form-row textarea{font:inherit;border:1px solid var(--border);color:var(--text-h);resize:vertical;background:#fff;border-radius:10px;padding:12px 14px}.form-row input:focus,.form-row textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-bg);outline:none}.form-note{text-align:center;color:var(--accent);min-height:20px;font-size:14px}.site-footer{border-top:1px solid var(--border);padding:24px 0}.footer-inner{color:var(--text);flex-wrap:wrap;justify-content:space-between;gap:8px;font-size:14px;display:flex}@media (width<=720px){.hero{padding:64px 0 56px}.hero h1{font-size:32px}.hero-sub{font-size:16px}.section-title{font-size:26px}.features{padding:56px 0}.feature-grid{grid-template-columns:1fr}.contact{padding:56px 0}.contact-form{padding:24px}.footer-inner{text-align:center;flex-direction:column}}