:root{
  --ink:#0f172a; --muted:#5b6472; --line:#e6e8ec; --card:#f7f8fa;
  --brand:#1f6f5c; --brand-ink:#155043; --brand-soft:#eaf4f0;
  --radius:14px;
}
*{box-sizing:border-box}
body{margin:0;background:#fff;color:var(--ink);
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  line-height:1.7;-webkit-font-smoothing:antialiased}
.wrap{max-width:1080px;margin:0 auto;padding:0 24px}
a{color:inherit}

/* 顶栏 */
.topbar{border-bottom:1px solid var(--line);background:#fff}
.topbar .inner{display:flex;align-items:center;justify-content:space-between;
  padding:16px 0;gap:20px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none}
.brand-mark{width:40px;height:40px;border-radius:11px;background:var(--brand);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:22px;font-weight:700}
.brand-text b{display:block;font-size:16px}
.brand-text span{display:block;font-size:12px;color:var(--muted);letter-spacing:.16em}
nav a{color:var(--muted);text-decoration:none;font-size:15px;margin-left:22px}
nav a:hover{color:var(--brand)}
nav a.here{color:var(--ink);font-weight:600}

/* Hero */
.hero{padding:84px 0 64px;background:
  radial-gradient(1100px 420px at 50% -160px, var(--brand-soft), transparent 70%)}
.eyebrow{display:inline-block;font-size:13px;letter-spacing:.12em;color:var(--brand);
  background:var(--brand-soft);border:1px solid #d5e8e1;padding:6px 12px;border-radius:999px}
h1{font-size:42px;line-height:1.24;margin:20px 0 16px;letter-spacing:-.01em}
.sub{font-size:18px;color:var(--muted);max-width:780px;margin:0 0 32px}
.btns{display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-block;padding:13px 26px;border-radius:10px;font-size:16px;
  text-decoration:none;border:1px solid transparent;cursor:pointer;font-family:inherit}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-ink)}
.btn-ghost{border-color:var(--line);color:var(--ink);background:#fff}
.btn-ghost:hover{border-color:#c9ceD6}

/* 区块 */
section{padding:62px 0;border-top:1px solid var(--line)}
h2{font-size:27px;margin:0 0 10px}
.lead{color:var(--muted);margin:0 0 32px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px}
.card h3{margin:0 0 10px;font-size:19px}
.card p{margin:0 0 14px;color:var(--muted);font-size:15px}
.card a.more{color:var(--brand);text-decoration:none;font-size:15px;font-weight:600}
.num{font-size:13px;color:var(--brand);font-weight:600;letter-spacing:.08em}

.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:s}
.step{padding:20px 0 0;border-top:2px solid var(--brand-soft);counter-increment:s}
.step::before{content:"0" counter(s);display:block;font-size:13px;color:var(--brand);
  font-weight:600;letter-spacing:.08em;margin-bottom:6px}
.step h4{margin:0 0 6px;font-size:16px}
.step p{margin:0;color:var(--muted);font-size:14px}

ul.why{list-style:none;padding:0;margin:0;display:grid;gap:14px}
ul.why li{padding-left:28px;position:relative;color:var(--muted)}
ul.why li b{color:var(--ink)}
ul.why li::before{content:"";position:absolute;left:0;top:9px;width:14px;height:14px;
  border-radius:4px;background:var(--brand-soft);border:1px solid #cfe4dc}

/* 表单 */
.form-card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:32px}
.fields{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{display:flex;flex-direction:column;gap:8px}
.field.full{grid-column:1/-1}
label{font-size:14px;color:var(--muted)}
input,textarea{font:inherit;color:var(--ink);background:#fff;border:1px solid var(--line);
  border-radius:10px;padding:12px 14px;outline:none}
input:focus,textarea:focus{border-color:#9dc7ba;box-shadow:0 0 0 3px var(--brand-soft)}
textarea{min-height:110px;resize:vertical}
.hp{position:absolute;left:-9999px;opacity:0;height:0;width:0}
.form-foot{display:flex;align-items:center;gap:16px;margin-top:20px;flex-wrap:wrap}
.hint{font-size:13px;color:var(--muted)}
.msg{font-size:14px;margin-top:14px;min-height:20px}
.msg.ok{color:#15803d}
.msg.err{color:#b91c1c}

footer{padding:38px 0;border-top:1px solid var(--line);color:var(--muted);font-size:14px}
footer a{color:var(--brand);text-decoration:none}

@media (max-width:860px){
  h1{font-size:31px}
  .grid2,.grid3,.steps{grid-template-columns:1fr}
  .fields{grid-template-columns:1fr}
  .hero{padding:52px 0 44px}
  section{padding:46px 0}
  nav a{margin-left:0;margin-right:16px}
}