:root{
  --brand:#14b866;
  --brand-deep:#0a8f54;
  --brand-soft:rgba(20,184,104,.12);
  --ink:#16202b;
  --muted:#5b6470;
  --bg:#f5f8fb;
  --card:#ffffff;
  --line:#e7edf3;
  --warn-bg:#fff7e6;
  --warn-line:#f4d28a;
  --shadow:0 10px 30px rgba(16,40,30,.08);
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--ink);line-height:1.8;font-size:16px;
}
a{color:var(--brand-deep);text-decoration:none}
img{max-width:100%}

/* 常驻顶栏 + 转化按钮 */
.topbar{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);box-shadow:0 2px 12px rgba(0,0,0,.04)}
.topbar .inner{max-width:860px;margin:0 auto;padding:12px 20px;display:flex;align-items:center;justify-content:space-between;gap:12px}
.brand{font-weight:800;font-size:19px;color:var(--ink)}
.brand b{color:var(--brand)}
.topbar .nav-cta{display:inline-block;background:linear-gradient(135deg,#1fd17a,#0faf63);color:#04210f;font-weight:800;
  padding:9px 18px;border-radius:999px;font-size:14px;box-shadow:0 6px 16px rgba(15,175,99,.32);white-space:nowrap}
.topbar .nav-cta:active{transform:translateY(1px)}

.crumb{max-width:860px;margin:0 auto;padding:12px 20px 0;font-size:13px;color:var(--muted)}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--brand)}

.wrap{max-width:760px;margin:0 auto;padding:6px 20px 30px}
h1{font-size:29px;line-height:1.35;margin:14px 0 10px;letter-spacing:-.3px}
.lead{color:var(--muted);font-size:17px;margin-bottom:22px}
h2{font-size:21px;margin:30px 0 10px;padding-left:12px;border-left:4px solid var(--brand)}
h3{font-size:17px;margin:16px 0 6px}
p{margin:12px 0;color:#2c333c}
ul{padding-left:20px;margin:12px 0}
li{margin:8px 0;color:#2c333c}
strong,b{color:var(--ink)}

.tag{display:inline-block;background:var(--brand-soft);color:var(--brand-deep);font-size:13px;
  padding:3px 11px;border-radius:999px;margin:3px 5px 3px 0;font-weight:600}

/* 信任背书条 */
.trust{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0;padding:14px 16px;background:var(--card);
  border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow)}
.trust .item{display:flex;align-items:center;gap:8px;font-size:13.5px;color:var(--muted);flex:1 1 160px}
.trust .dot{width:8px;height:8px;border-radius:50%;background:var(--brand);flex:none}

/* 步骤卡片 */
.steps{display:grid;gap:12px;margin:16px 0}
.step{display:flex;gap:14px;align-items:flex-start;background:var(--card);border:1px solid var(--line);
  border-radius:14px;padding:16px 18px;box-shadow:var(--shadow)}
.step .num{flex:none;width:30px;height:30px;border-radius:50%;background:linear-gradient(135deg,#1fd17a,#0faf63);
  color:#04210f;font-weight:800;display:flex;align-items:center;justify-content:center;font-size:15px}
.step h3{margin:0 0 4px}
.step p{margin:0;color:var(--muted);font-size:14.5px}

/* 高亮说明框 */
.note{border:1px solid var(--brand);background:var(--brand-soft);border-radius:14px;padding:14px 16px;margin:16px 0;font-size:15px}
.warn{border:1px solid var(--warn-line);background:var(--warn-bg);border-radius:14px;padding:14px 16px;margin:16px 0;font-size:15px}

/* 转化块（多处出现） */
.cta{background:linear-gradient(135deg,#0faf63,#0a8f54);color:#eafff3;text-align:center;border-radius:18px;
  padding:28px 22px;margin:30px 0;box-shadow:0 14px 34px rgba(10,143,84,.28)}
.cta h3{color:#fff;font-size:21px;margin-bottom:8px}
.cta p{color:#d7fbe8;margin:0 0 6px}
.cta a{display:inline-block;background:#04210f;color:#fff;font-weight:800;padding:13px 34px;border-radius:999px;
  margin-top:14px;box-shadow:0 8px 20px rgba(0,0,0,.25);font-size:16px}
.cta a:active{transform:translateY(1px)}
.cta.alt{background:var(--card);border:1px solid var(--line);box-shadow:var(--shadow)}
.cta.alt h3{color:var(--ink)}
.cta.alt p{color:var(--muted)}
.cta.alt a{background:linear-gradient(135deg,#1fd17a,#0faf63);color:#04210f;box-shadow:0 8px 18px rgba(15,175,99,.3)}

/* 对比表 */
.cmp{width:100%;border-collapse:collapse;margin:16px 0;background:var(--card);border-radius:12px;overflow:hidden;box-shadow:var(--shadow);font-size:14.5px}
.cmp th,.cmp td{border:1px solid var(--line);padding:11px 12px;text-align:left;vertical-align:top}
.cmp th{background:#eef6f1;color:var(--brand-deep);font-weight:700}
.cmp td.yes{color:var(--brand-deep);font-weight:700}
.cmp td.no{color:#b0473a}

/* FAQ */
.faq{margin:16px 0}
.faq details{border:1px solid var(--line);border-radius:12px;padding:14px 16px;margin:10px 0;background:var(--card);box-shadow:0 4px 14px rgba(16,40,30,.04)}
.faq summary{font-weight:700;cursor:pointer;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary:before{content:"＋";color:var(--brand);font-weight:800;margin-right:8px}
.faq details[open] summary:before{content:"－"}
.faq p{margin:10px 0 0;color:var(--muted)}

/* 底部站内链 */
.sitemap-nav{max-width:860px;margin:10px auto 30px;padding:20px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:8px 14px;align-items:center;background:var(--card)}
.sitemap-nav .sitemap-title{font-weight:800;color:var(--ink);margin-right:4px}
.sitemap-nav a{color:var(--muted);font-size:13px}
.sitemap-nav a:hover{color:var(--brand)}

footer{max-width:860px;margin:0 auto;padding:24px 20px 40px;color:var(--muted);font-size:13px;text-align:center;border-top:1px solid var(--line)}
footer a{color:var(--muted)}

@media (max-width:560px){
  h1{font-size:24px}
  .trust .item{flex:1 1 100%}
  .cta a{padding:12px 26px}
}