:root{
  --green:#1a8f5c;
  --green-l:#e8f7ef;
  --blue:#2563eb;
  --amber:#d97706;
  --ink:#1a2332;
  --muted:#64748b;
  --line:#e2e8f0;
  --soft:#f8fafc;
  --radius:12px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:16px;-webkit-text-size-adjust:100%}
body{font-family:"PingFang SC","Microsoft YaHei",sans-serif;background:var(--soft);color:var(--ink);line-height:1.65}
img{max-width:100%;height:auto;display:block}
a{color:var(--green);text-decoration:none}
a:hover{text-decoration:underline}
ul{list-style:none}
.container{width:min(1120px,92vw);margin:0 auto}

.site-header{position:sticky;top:0;z-index:100;background:#fff;border-bottom:1px solid var(--line)}
.topbar{display:flex;align-items:center;justify-content:space-between;padding:.75rem 0;gap:1rem;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:.5rem;font-weight:800;font-size:1.05rem;color:var(--ink);text-decoration:none!important}
.brand-mark{width:32px;height:32px;background:var(--green);color:#fff;border-radius:8px;display:grid;place-items:center;font-size:.72rem;font-weight:900}
.nav{display:flex;flex-wrap:wrap;gap:.25rem 1rem;align-items:center;font-size:.88rem}
.nav a{color:var(--muted);font-weight:600;text-decoration:none!important}
.nav a:hover{color:var(--green)}
.nav-item{position:relative}
.nav-item .dropdown{display:none;position:absolute;top:100%;left:0;background:#fff;border:1px solid var(--line);border-radius:8px;padding:.5rem;min-width:180px;z-index:10}
.nav-item:hover .dropdown{display:block}
.dropdown a{display:block;padding:.45rem .65rem;font-size:.82rem;border-radius:6px}
.dropdown a:hover{background:var(--soft)}
.header-actions{display:flex;align-items:center;gap:.75rem}
.language{font-size:.78rem;color:var(--muted)}

.btn{display:inline-block;padding:.55rem 1.15rem;font-weight:700;font-size:.88rem;border-radius:8px;text-decoration:none!important;border:1px solid transparent;cursor:pointer}
.btn-primary{background:var(--green);color:#fff!important}
.btn-primary:hover{background:#157a4e}
.btn-amber{background:var(--amber);color:#fff!important}
.btn-blue{background:var(--blue);color:#fff!important}
.btn-ghost{background:transparent;color:var(--ink)!important;border-color:var(--line)}

.section{padding:48px 0}
.below-fold{padding:48px 0}
.section-head{margin-bottom:24px}
.section-label{display:inline-block;font-size:11px;font-weight:900;letter-spacing:.1em;color:var(--green);margin-bottom:8px;text-transform:uppercase}
.section-head h2,.feature-head h2{font-size:clamp(1.35rem,3vw,1.75rem);font-weight:800;margin-bottom:8px}
.section-head p,.feature-head p{color:var(--muted);font-size:.92rem}

.progress-wrap{margin-bottom:16px}
.progress-meta{display:flex;justify-content:space-between;font-size:13px;color:var(--muted);margin-bottom:8px;flex-wrap:wrap;gap:8px}
.progress-bar{height:8px;background:var(--line);border-radius:999px;overflow:hidden}
.progress-fill{height:100%;width:0;background:var(--green);border-radius:999px;transition:width .3s}
.check-row{display:flex;gap:12px;padding:12px 14px;border:1px solid var(--line);border-radius:10px;margin-bottom:8px;cursor:pointer;background:#fff;align-items:flex-start}
.check-row:hover{border-color:var(--green)}
.check-row.done{background:var(--green-l);border-color:#9fd4b8}
.check-row input{margin-top:4px;accent-color:var(--green)}
.check-row strong{display:block;font-size:14px;margin-bottom:2px}
.check-row span{font-size:12px;color:var(--muted)}

.footer{background:var(--ink);color:#fff;padding:48px 0 24px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-bottom:24px}
.footer h3,.footer h4{font-size:.92rem;margin-bottom:12px;color:#fff}
.footer p,.footer a,.footer li{font-size:.84rem;color:rgba(255,255,255,.7)}
.footer a:hover{color:#fff}
.footer ul li{margin-bottom:6px}
.subscribe input{width:100%;padding:10px 12px;border:1px solid rgba(255,255,255,.2);border-radius:8px;background:rgba(255,255,255,.08);color:#fff;font-size:14px}
.copyright{border-top:1px solid rgba(255,255,255,.12);padding-top:16px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;font-size:12px;color:rgba(255,255,255,.5)}

.faq{border:1px solid var(--line);border-radius:10px;padding:14px 16px;margin-bottom:10px;background:#fff}
.faq summary{font-weight:700;cursor:pointer;font-size:14px}
.faq p{margin-top:10px;font-size:13px;color:var(--muted)}

@media(max-width:768px){
  .footer-grid{grid-template-columns:1fr 1fr}
  .nav-item .dropdown{position:static;display:none}
}