/* 柱力听写 · 官网样式（无框架、单文件） */
:root{
  --ink:#1E3D6E; --ink2:#2B5088; --bg:#F6F8FC; --card:#FFFFFF;
  --line:#E2E8F2; --text:#1F2A37; --muted:#5B6B80; --muted2:#8494A8;
  --gold:#C9A227; --ok:#2E7D32; --r:16px; --max:1080px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  line-height:1.75;-webkit-font-smoothing:antialiased}
a{color:var(--ink2);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}

/* 顶栏 */
header.site{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.92);
  backdrop-filter:saturate(180%) blur(10px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;gap:22px;height:62px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--ink);font-size:18px;letter-spacing:.5px}
.brand .logo{width:30px;height:30px;border-radius:8px;background:var(--ink);
  color:#fff;display:grid;place-items:center;font-size:15px;font-weight:800}
.nav ul{display:flex;gap:18px;margin:0;padding:0;list-style:none;font-size:14.5px}
.nav ul a{color:var(--muted);font-weight:500;display:inline-block;padding:10px 2px}
.nav ul a:hover{color:var(--ink);text-decoration:none}
.nav .cta{margin-left:auto;background:var(--ink);color:#fff;padding:9px 16px;border-radius:999px;font-size:14px;font-weight:600}
.nav .cta:hover{background:var(--ink2);text-decoration:none}

/* 英雄区 */
.hero{padding:64px 0 44px;background:
  radial-gradient(1100px 420px at 78% -8%,#DCE6F6 0%,rgba(220,230,246,0) 62%),var(--bg)}
.hero .inner{display:grid;grid-template-columns:1.08fr .92fr;gap:44px;align-items:center}
.hero h1{font-size:34px;line-height:1.3;margin:0 0 14px;letter-spacing:-.3px;color:#12233D}
.hero h1 em{font-style:normal;color:var(--ink);background:linear-gradient(transparent 62%,#CFE0FA 62%)}
.hero p.lead{font-size:16.5px;color:var(--muted);margin:0 0 22px}
.badges{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:22px}
.badge{font-size:13px;color:var(--ink2);background:#E9F0FB;border:1px solid #D6E2F5;padding:5px 11px;border-radius:999px}
.acts{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.btn{display:inline-block;padding:13px 22px;border-radius:12px;font-weight:700;font-size:15px}
.btn.primary{background:var(--ink);color:#fff;box-shadow:0 10px 24px -12px rgba(30,61,110,.7)}
.btn.primary:hover{background:var(--ink2);text-decoration:none}
.btn.ghost{background:#fff;color:var(--ink);border:1px solid var(--line)}
.btn.ghost:hover{text-decoration:none;border-color:#C7D6EC}

/* 手机模型（纯 CSS，无图片） */
.phone{width:290px;margin:0 auto;background:#fff;border-radius:34px;padding:12px;
  box-shadow:0 30px 60px -30px rgba(18,35,61,.45),0 0 0 8px #0F1A2C}
.phone .screen{background:#FAFBFE;border-radius:24px;overflow:hidden}
.phone .bar{height:26px;display:grid;place-items:center;color:#9AA8BC;font-size:10px}
.phone .card{margin:8px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px}
.phone .hd{display:flex;justify-content:space-between;font-size:10px;color:#7C8CA2;margin-bottom:6px}
.phone .big{font-size:17px;font-weight:800;color:var(--ink)}
.grid-box{position:relative;aspect-ratio:1;border:1px dashed #C7D6EC;border-radius:10px;margin:8px 0;
  background:linear-gradient(#EDF2FA 1px,transparent 1px) 0 0/33.3% 33.3%,
             linear-gradient(90deg,#EDF2FA 1px,transparent 1px) 0 0/33.3% 33.3%,#fff}
.grid-box .stroke{position:absolute;height:3px;background:#1E3D6E;border-radius:2px;transform-origin:left center}
.chips{display:flex;gap:5px;margin-top:6px}
.chips i{width:22px;height:22px;border-radius:6px;background:#EEF3FB;color:var(--ink);
  display:grid;place-items:center;font-size:12px;font-style:normal;border:1px solid #DCE7F7}
.chips i.on{background:var(--ink);color:#fff;border-color:var(--ink)}
.phone .note{font-size:10px;color:#8494A8;margin-top:6px}

/* 通用区块 */
section{padding:56px 0}
section.alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
h2{font-size:27px;margin:0 0 10px;letter-spacing:-.3px;color:#12233D}
h3{font-size:17.5px;margin:0 0 8px;color:#16273F}
.sub{color:var(--muted);margin:0 0 30px;font-size:15.5px}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:22px}
.card .ico{width:38px;height:38px;border-radius:10px;background:#E9F0FB;color:var(--ink);
  display:grid;place-items:center;font-size:18px;font-weight:800;margin-bottom:12px}
.card p{margin:0;color:var(--muted);font-size:14.5px}
.two{display:grid;grid-template-columns:1fr 1fr;gap:34px;align-items:center}
.list{margin:0;padding-left:0;list-style:none}
.list li{position:relative;padding-left:26px;margin:9px 0;color:#33415A}
.list li:before{content:"";position:absolute;left:2px;top:10px;width:8px;height:8px;border-radius:50%;
  background:var(--ink);opacity:.55}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;counter-reset:s}
.step{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:22px;position:relative}
.step:before{counter-increment:s;content:counter(s);position:absolute;top:-14px;left:20px;width:30px;height:30px;
  border-radius:50%;background:var(--ink);color:#fff;display:grid;place-items:center;font-weight:700;font-size:14px}
.step h3{margin-top:8px}
.step p{margin:0;color:var(--muted);font-size:14.5px}
.quote{border-left:3px solid var(--gold);background:#FFFDF6;padding:16px 20px;border-radius:0 12px 12px 0;color:#4A3F1F}
.faq details{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px 18px;margin-bottom:12px}
.faq summary{cursor:pointer;font-weight:600;color:#16273F}
.faq summary::marker{color:var(--ink)}
.faq p{margin:10px 0 0;color:var(--muted);font-size:14.5px}
footer.site{background:#0F1A2C;color:#C7D3E6;padding:44px 0 30px;font-size:14px}
footer.site a{color:#DCE6F6}
footer .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:28px;margin-bottom:26px}
footer h4{color:#fff;font-size:14.5px;margin:0 0 10px;font-weight:700}
footer ul{list-style:none;margin:0;padding:0;display:grid;gap:7px}
footer .cp{border-top:1px solid rgba(255,255,255,.12);padding-top:18px;display:flex;justify-content:space-between;
  gap:16px;flex-wrap:wrap;color:#8FA2BE;font-size:12.5px}
.prose{max-width:820px}
.prose h2{margin-top:38px}
.prose p{color:#33415A}
.prose ul{color:#33415A}
.crumb{font-size:13px;color:var(--muted2);margin:18px 0 0}
.crumb a{color:var(--muted2)}
.tbl{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden}
.tbl th,.tbl td{padding:11px 14px;border-bottom:1px solid var(--line);text-align:left;font-size:14.5px}
.tbl th{background:#F2F6FC;color:#16273F;font-weight:600}
.tbl tr:last-child td{border-bottom:0}

@media (max-width:900px){
  .hero .inner,.two{grid-template-columns:1fr}
  .cards,.steps{grid-template-columns:1fr}
  footer .cols{grid-template-columns:1fr}
  .hero h1{font-size:27px}
  .nav ul{display:none}
}