:root{--bg:#ffffff;--soft:#f4f5f7;--card:#ffffff;--bd:#e2e4ea;--tx:#1e2230;--dim:#5b6272;--hd:#0a0d18;--ac:#2b5cff;--ac2:#0033cc;--on:#fff;--rad:0px;--mw:960px;}
*{margin:0;padding:0;box-sizing:border-box;}html{scroll-behavior:smooth;}
body{font-family:"Inter","PingFang SC","Noto Sans SC",system-ui,sans-serif;line-height:1.72;color:var(--tx);background:var(--bg);font-size:16px;}
a{color:var(--ac);text-decoration:none;border-bottom:1px solid transparent;}a:hover{border-bottom-color:var(--ac);}
h1,h2,h3,h4{color:var(--hd);line-height:1.24;font-weight:700;letter-spacing:-.4px;}
.wrap{max-width:var(--mw);margin:0 auto;padding:0 24px;}
.skip-link{position:absolute;left:-9999px;}.skip-link:focus{left:12px;top:12px;background:var(--ac);color:#fff;padding:8px 14px;}
.site-header{background:#fff;border-bottom:1px solid var(--bd);}
.nav{display:flex;align-items:center;justify-content:space-between;padding:18px 24px;max-width:var(--mw);margin:0 auto;flex-wrap:wrap;gap:14px;}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:800;font-size:16px;color:var(--hd);letter-spacing:-.3px;}
.brand .dot{width:14px;height:14px;background:var(--ac);border-radius:2px;}
.nav-links{display:flex;gap:24px;flex-wrap:wrap;}
.nav-links a{color:var(--dim);font-size:14px;padding:0;border-bottom:2px solid transparent;padding-bottom:2px;}
.nav-links a:hover,.nav-links a[aria-current=page]{color:var(--hd);border-bottom-color:var(--ac);}
.disclaimer-bar{background:var(--soft);color:var(--dim);text-align:center;font-size:12.5px;padding:8px 12px;border-bottom:1px solid var(--bd);}
.hero{padding:96px 0 76px;text-align:center;}
.hero h1{font-size:clamp(32px,5.4vw,54px);margin:0 auto 20px;max-width:14em;}.hero h1 span{color:var(--ac);}
.lead{font-size:1.1rem;color:var(--dim);max-width:640px;margin:0 auto 26px;}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap;justify-content:center;}
.hero-badge{display:inline-block;background:var(--soft);color:var(--dim);font-size:12px;font-weight:600;padding:5px 12px;border-radius:0;margin-bottom:18px;letter-spacing:2px;text-transform:uppercase;}
.hero-grid{display:block;}.hero-content{max-width:840px;margin:0 auto;}
.hero-stats{margin-top:40px;display:grid;grid-template-columns:repeat(4,1fr);gap:24px;border-top:1px solid var(--bd);border-bottom:1px solid var(--bd);padding:24px 0;}
.hero-stats .stat-item{padding:0;text-align:center;}
.stat-row{display:flex;flex-wrap:wrap;gap:26px;margin-top:22px;justify-content:center;}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px;justify-content:center;}
.chips span{background:var(--soft);border:none;border-radius:0;padding:5px 12px;font-size:12.5px;color:var(--dim);}
.stat-item h3{font-size:1.8rem;color:var(--hd);font-weight:800;}.stat-item p{font-size:.82rem;color:var(--dim);letter-spacing:1.5px;text-transform:uppercase;margin-top:4px;}
.btn{display:inline-block;padding:12px 26px;font-weight:600;font-size:14.5px;border-radius:0;transition:.15s;}
.btn-primary{background:var(--ac);color:#fff;}.btn-primary:hover{background:var(--ac2);color:#fff;border:none;}
.btn-ghost{border:1px solid var(--bd);color:var(--hd);background:#fff;}.btn-ghost:hover{border-color:var(--hd);color:var(--hd);}
.section{padding:64px 0;border-top:1px solid var(--bd);}
.section h2{font-size:clamp(22px,3.4vw,30px);margin-bottom:12px;}
.section-sub{color:var(--dim);margin-bottom:32px;max-width:680px;}
.grid{display:grid;gap:24px;}.grid-3{grid-template-columns:repeat(auto-fit,minmax(240px,1fr));}
.card{background:transparent;border:none;border-top:2px solid var(--hd);padding:18px 0 0;transition:.2s;}
.card:hover h3{color:var(--ac);}
.card h3{font-size:1.1rem;margin-bottom:8px;}
.card p{color:var(--dim);font-size:.94rem;}
.card-icon{display:inline-block;background:var(--soft);color:var(--dim);font-weight:700;font-size:11px;padding:3px 10px;letter-spacing:2px;text-transform:uppercase;margin-bottom:12px;}
.steps{counter-reset:step;display:grid;gap:0;}
.step{position:relative;padding:24px 0 24px 62px;background:transparent;border:none;border-top:1px solid var(--bd);counter-increment:step;}
.step:last-child{border-bottom:1px solid var(--bd);}
.step::before{content:counter(step,decimal-leading-zero);position:absolute;left:0;top:26px;color:var(--dim);font-weight:600;font-size:14px;letter-spacing:2px;}
.step h4{margin-bottom:6px;}.step p{color:var(--dim);font-size:.94rem;}
.faq details{background:transparent;border:none;border-top:1px solid var(--bd);padding:0 2px;margin:0;}
.faq details:last-of-type{border-bottom:1px solid var(--bd);}
.faq summary{cursor:pointer;padding:18px 0;font-weight:600;color:var(--hd);list-style:none;display:flex;justify-content:space-between;gap:12px;}
.faq summary::-webkit-details-marker{display:none;}
.faq summary::after{content:'→';color:var(--ac);transition:.2s;}
.faq details[open] summary::after{transform:rotate(90deg);}
.faq details p{padding:0 0 18px;color:var(--dim);font-size:.94rem;}
.prose p{margin-bottom:14px;}.prose ul,.prose ol{margin:0 0 16px 22px;}.prose li{margin-bottom:8px;color:var(--dim);}.prose h3{margin:22px 0 10px;}
.topic-links{display:flex;flex-wrap:wrap;gap:22px;}
.topic-links a{font-size:14px;padding:0;color:var(--ac);border-bottom:1px solid var(--ac);}
.topic-links a:hover{color:var(--ac2);border-bottom-color:var(--ac2);}
.breadcrumb{font-size:13px;color:var(--dim);padding:20px 0 0;}
.site-footer{background:#fafbfc;border-top:1px solid var(--bd);padding:52px 0 28px;margin-top:60px;}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:30px;margin-bottom:24px;}
.footer-grid h4{font-size:12px;color:var(--hd);text-transform:uppercase;letter-spacing:2px;margin-bottom:12px;}
.footer-grid a{color:var(--dim);font-size:13px;display:block;margin-bottom:6px;}.footer-grid a:hover{color:var(--ac);}
.footer-bottom{border-top:1px solid var(--bd);padding-top:20px;text-align:center;color:var(--dim);font-size:12.5px;}
@media(max-width:820px){.nav{flex-direction:column;align-items:flex-start;gap:10px;}.hero-stats{grid-template-columns:1fr 1fr;}}