:root{--ink:#0f172a;--ink-2:#475569;--ink-3:#94a3b8;--brand:#1e3a8a;--brand-2:#1e40af;--brand-3:#2563eb;--brand-soft:#eff6ff;--brand-line:#bfdbfe;--dark:#0f172a;--dark-2:#1a3a6b;--bg:#fff;--bg-alt:#f8fafc;--line:#e2e8f0;--line-2:#cbd5e1;--radius:12px;--radius-lg:16px;--maxw:1180px;--font:-apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}body{font-family:var(--font);color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased;font-size:16px;line-height:1.75}img{max-width:100%;display:block}a{color:var(--brand-2);text-decoration:none}a:hover{color:var(--brand-3)}h1,h2,h3,h4{letter-spacing:-.01em;font-weight:700;line-height:1.3}h1{font-size:clamp(28px,4.6vw,46px)}h2{font-size:clamp(22px,3.4vw,32px)}h3{font-size:clamp(17px,2.2vw,20px)}h4{font-size:16px}p{color:var(--ink-2)}.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}.grid>*,.hero-stats>*{min-width:0}.section{padding:72px 0}.section-alt{background:var(--bg-alt);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.section-dark{background:var(--dark);color:#fff}.section-dark p{color:#cbd5e1}.section-head{max-width:760px;margin-bottom:40px}.section-head.center{text-align:center;margin-left:auto;margin-right:auto}.section-head .eyebrow{letter-spacing:.08em;color:var(--brand-2);background:var(--brand-soft);border:1px solid var(--brand-line);border-radius:99px;margin-bottom:14px;padding:4px 12px;font-size:13px;font-weight:600;display:inline-block}.section-head h2{margin-bottom:12px}.section-head p{font-size:16px}.grid{gap:20px;display:grid}.grid-2{grid-template-columns:repeat(auto-fit,minmax(min(100%,300px),1fr))}.grid-3{grid-template-columns:repeat(auto-fit,minmax(min(100%,260px),1fr))}.grid-4{grid-template-columns:repeat(auto-fit,minmax(min(100%,220px),1fr))}.btn{cursor:pointer;white-space:nowrap;border:1px solid #0000;border-radius:10px;align-items:center;gap:6px;padding:12px 24px;font-size:15px;font-weight:600;transition:all .18s;display:inline-flex}.btn-primary{background:var(--brand);color:#fff}.btn-primary:hover{background:var(--brand-2);color:#fff}.btn-outline{color:var(--brand);border-color:var(--brand-line);background:0 0}.btn-outline:hover{background:var(--brand-soft);color:var(--brand)}.btn-light{color:var(--dark);background:#fff}.btn-light:hover{color:var(--dark);background:#f1f5f9}.btn-ghost{color:#fff;background:0 0;border-color:#ffffff59}.btn-ghost:hover{color:#fff;background:#ffffff1a}.btn-row{flex-wrap:wrap;gap:12px;display:flex}.card{border:1px solid var(--line);border-radius:var(--radius-lg);background:#fff;padding:26px;transition:all .18s}.card:hover{border-color:var(--brand-line);box-shadow:0 6px 24px #0f172a0f}.card h3{margin-bottom:10px}.card p{font-size:15px}.card .num{background:var(--brand-soft);width:34px;height:34px;color:var(--brand);border-radius:9px;justify-content:center;align-items:center;margin-bottom:14px;font-size:14px;font-weight:700;display:inline-flex}.site-header{z-index:50;backdrop-filter:blur(10px);border-bottom:1px solid var(--line);background:#fffffff0;position:sticky;top:0}.site-header .inner{justify-content:space-between;align-items:center;height:68px;display:flex}.brand{color:var(--ink);align-items:center;gap:10px;font-size:17px;font-weight:700;display:flex}.brand:hover{color:var(--ink)}.brand-mark{background:var(--brand);color:#fff;border-radius:8px;justify-content:center;align-items:center;width:32px;height:32px;font-size:15px;font-weight:700;display:flex}.nav-links{align-items:center;gap:4px;display:flex}.nav-links a{color:var(--ink-2);border-radius:8px;padding:8px 12px;font-size:14.5px;font-weight:500;transition:all .15s}.nav-links a:hover{color:var(--brand);background:var(--brand-soft)}.nav-links a.active{color:var(--brand);font-weight:600}.nav-toggle{border:1px solid var(--line);cursor:pointer;background:#fff;border-radius:9px;flex-direction:column;justify-content:center;align-items:center;gap:4px;width:40px;height:40px;display:none}.nav-toggle span{background:var(--ink);border-radius:2px;width:17px;height:2px;display:block}.hero{background:linear-gradient(160deg, var(--dark) 0%, var(--dark-2) 100%);color:#fff;padding:84px 0 76px;position:relative;overflow:hidden}.hero h1{color:#fff;max-width:20ch;margin-bottom:18px}.hero .lede{color:#cbd5e1;max-width:62ch;margin-bottom:28px;font-size:17px}.hero .badge-row{flex-wrap:wrap;gap:8px;margin-bottom:26px;display:flex}.hero .badge{color:#dbeafe;background:#ffffff1a;border:1px solid #fff3;border-radius:99px;padding:5px 12px;font-size:13px}.hero-stats{border-top:1px solid #ffffff26;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:16px;margin-top:44px;padding-top:32px;display:grid}.hero-stats .stat .k{color:#fff;font-size:22px;font-weight:700}.hero-stats .stat .v{color:#94a3b8;font-size:13.5px}.svc-head{flex-wrap:wrap;align-items:baseline;gap:12px;margin-bottom:8px;display:flex}.svc-head .en{color:var(--ink-3);letter-spacing:.04em;font-size:13px}.svc-list{margin-top:22px;list-style:none}.svc-list li{border-top:1px solid var(--line);padding:16px 0}.svc-list li:last-child{border-bottom:1px solid var(--line)}.svc-list .t{color:var(--ink);margin-bottom:4px;font-size:15.5px;font-weight:600}.svc-list .d{color:var(--ink-2);font-size:14.5px}.faq-list{max-width:900px;margin:0 auto}.faq-item{border:1px solid var(--line);border-radius:var(--radius);background:#fff;margin-bottom:12px;overflow:hidden}.faq-item summary{cursor:pointer;color:var(--ink);justify-content:space-between;align-items:center;gap:16px;padding:18px 22px;font-size:15.5px;font-weight:600;list-style:none;display:flex}.faq-item summary::-webkit-details-marker{display:none}.faq-item summary:after{content:"+";color:var(--brand);flex-shrink:0;font-size:20px;font-weight:400;transition:all .2s}.faq-item[open] summary:after{transform:rotate(45deg)}.faq-item .a{color:var(--ink-2);padding:0 22px 20px;font-size:15px}.prose{max-width:780px}.prose h2{margin:40px 0 14px;font-size:25px}.prose h3{margin:28px 0 10px;font-size:19px}.prose p{margin-bottom:16px}.prose ul,.prose ol{color:var(--ink-2);margin:0 0 18px 22px}.prose li{margin-bottom:7px}.prose strong{color:var(--ink);font-weight:600}.prose blockquote{border-left:3px solid var(--brand-line);background:var(--brand-soft);border-radius:0 10px 10px 0;margin:0 0 20px;padding:14px 20px}.prose blockquote p{color:var(--ink-2);margin:0}.prose code{border:1px solid var(--line);background:#f1f5f9;border-radius:5px;padding:1px 6px;font-family:ui-monospace,Consolas,monospace;font-size:13.5px}.prose pre{border:1px solid var(--line);background:#f8fafc;border-radius:10px;margin-bottom:20px;padding:16px;overflow-x:auto}.prose pre code{background:0 0;border:none;padding:0;font-size:13px}.prose table{border-collapse:collapse;width:100%;margin:0 0 22px;font-size:14.5px}.prose th,.prose td{border:1px solid var(--line);text-align:left;vertical-align:top;padding:10px 13px}.prose th{background:var(--bg-alt);font-weight:600}.prose img{border-radius:10px;margin:8px 0 22px}.site-footer{background:var(--dark);color:#cbd5e1;margin-top:0;padding:56px 0 28px}.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px;margin-bottom:40px;display:grid}.site-footer h4{color:#fff;margin-bottom:14px;font-size:14px;font-weight:600}.site-footer a{color:#cbd5e1;padding:4px 0;font-size:14px;display:block}.site-footer a:hover{color:#fff}.site-footer .about{color:#94a3b8;max-width:34ch;margin-top:12px;font-size:14px}.footer-bottom{color:#94a3b8;border-top:1px solid #ffffff1f;flex-wrap:wrap;justify-content:space-between;gap:12px;padding-top:22px;font-size:13px;display:flex}.tag{background:var(--brand-soft);color:var(--brand-2);border:1px solid var(--brand-line);border-radius:6px;margin-bottom:12px;padding:3px 10px;font-size:12.5px;font-weight:600;display:inline-block}.meta{color:var(--ink-3);font-size:13.5px}.divider{background:var(--line);height:1px;margin:40px 0}.check-list{margin-top:14px;list-style:none}.check-list li{color:var(--ink-2);margin-bottom:9px;padding-left:26px;font-size:15px;position:relative}.check-list li:before{content:"";border-left:2px solid var(--brand-2);border-bottom:2px solid var(--brand-2);width:14px;height:8px;position:absolute;top:8px;left:0;transform:rotate(-45deg)}.crumb{color:var(--ink-3);padding:18px 0 0;font-size:13.5px}.crumb a{color:var(--ink-3)}.crumb a:hover{color:var(--brand)}@media (width<=900px){.footer-grid{grid-template-columns:1fr 1fr}.section{padding:56px 0}.hero{padding:60px 0 54px}}@media (width<=760px){.nav-toggle{display:flex}.nav-links{border-bottom:1px solid var(--line);background:#fff;flex-direction:column;align-items:stretch;gap:2px;padding:10px 16px 16px;display:none;position:absolute;top:68px;left:0;right:0}.nav-links.open{display:flex}.nav-links a{padding:11px 12px}.footer-grid{grid-template-columns:1fr;gap:26px}.card{padding:22px}.container{padding:0 18px}}