:root{--ink:#111B21;--g:#25D366;--bg:#F0F2F5;--w:#fff;--muted:#667781;--line:#E4E7EA}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg);line-height:1.75;font-size:16px}
img,svg{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.wrap{width:min(1120px,calc(100% - 32px));margin:0 auto}
header{position:sticky;top:0;z-index:30;background:#fff;border-bottom:1px solid var(--line)}
.bar{display:flex;align-items:center;justify-content:space-between;min-height:68px;gap:20px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:17px;white-space:nowrap}
.brand svg{flex:0 0 auto}
nav{display:flex;flex-wrap:wrap;gap:8px 16px;justify-content:flex-end}
nav a{font-size:14px;color:#3B4A54}
nav a:hover{color:var(--g)}
.hero{padding:48px 0 36px;display:grid;grid-template-columns:1.05fr .95fr;gap:36px;align-items:center}
.hero h1{font-size:34px;line-height:1.28;margin-bottom:16px}
.hero p{color:#3B4A54;margin-bottom:10px}
.mock{background:#fff;border-radius:12px;box-shadow:0 8px 28px rgba(17,27,33,.08);overflow:hidden;border:1px solid var(--line)}
section{padding:28px 0}
h2{font-size:26px;line-height:1.35;margin-bottom:18px}
.lead{color:#3B4A54;margin-bottom:18px;max-width:760px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.card{background:#fff;border-radius:12px;box-shadow:0 2px 8px rgba(17,27,33,.06);padding:20px}
.card h3{font-size:17px;margin:10px 0 8px}
.card p{color:#3B4A54;font-size:15px;margin-bottom:8px}
.card p:last-child{margin-bottom:0}
.ico-wrap{width:42px;height:42px;border-radius:10px;background:#E7F8EE;display:flex;align-items:center;justify-content:center;color:#128C7E}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0;background:#fff;border-radius:12px;box-shadow:0 2px 8px rgba(17,27,33,.06);overflow:hidden}
.step{padding:20px 16px;border-right:1px solid var(--line);position:relative}
.step:last-child{border-right:0}
.num{width:28px;height:28px;border-radius:50%;background:var(--g);color:#fff;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;margin-bottom:10px}
.step h3{font-size:16px;margin-bottom:8px}
.step p{font-size:14px;color:#3B4A54}
table{width:100%;border-collapse:collapse;background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 2px 8px rgba(17,27,33,.06)}
th,td{padding:14px 16px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line);font-size:14px}
th{background:#111B21;color:#fff;font-weight:600}
td{color:#3B4A54}
tr:last-child td{border-bottom:0}
.limits{background:#fff;border-radius:12px;box-shadow:0 2px 8px rgba(17,27,33,.06);padding:8px 4px}
.limits li{list-style:none;padding:14px 18px;border-bottom:1px solid var(--line);color:#3B4A54}
.limits li:last-child{border-bottom:0}
.limits strong{color:var(--ink);display:block;margin-bottom:4px}
.faq details{background:#fff;border-radius:12px;box-shadow:0 2px 8px rgba(17,27,33,.06);padding:14px 18px;margin-bottom:10px}
.faq summary{cursor:pointer;font-weight:600}
.faq details p{margin-top:10px;color:#3B4A54}
footer{background:#111B21;color:#D1D7DB;margin-top:36px;padding:36px 0 22px;font-size:14px}
.fgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
footer h3{color:#fff;font-size:15px;margin-bottom:10px}
footer p{margin-bottom:8px}
.legal{margin-top:22px;padding-top:16px;border-top:1px solid #2A3942;color:#8696A0;font-size:13px}
@media (max-width:900px){
.hero,.grid3,.grid2,.grid4,.steps,.fgrid{grid-template-columns:1fr}
nav{justify-content:flex-start}
}