:root{
  --ink:#101318;
  --muted:#606976;
  --line:#dfe5e6;
  --paper:#f7f5ef;
  --white:#fff;
  --cyan:#17b8c4;
  --green:#668e35;
  --amber:#f0a43a;
  --coral:#da6b4f;
  --maxw:1180px;
  --radius:8px;
  --shadow:0 24px 70px rgba(16,19,24,.14);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  min-width:320px;
  color:var(--ink);
  background:var(--paper);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang TC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit}
h1,h2,h3,p,a,strong,span,li{overflow-wrap:anywhere}
.wrap{width:min(var(--maxw),calc(100% - 44px));margin:0 auto}
.site-header{
  position:sticky;
  top:0;
  z-index:20;
  background:rgba(247,245,239,.9);
  border-bottom:1px solid rgba(16,19,24,.1);
  backdrop-filter:blur(18px);
}
.header-inner{
  min-height:74px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:28px;
}
.brand{display:flex;align-items:center;gap:12px;min-width:190px;line-height:1}
.brand img{width:38px;height:38px}
.brand-name{display:block;font-size:18px;font-weight:760}
.brand-sub{display:block;margin-top:5px;color:var(--muted);font-size:12px;font-weight:650;text-transform:uppercase}
.header-actions{display:flex;align-items:center;justify-content:flex-end;gap:18px;min-width:0}
.primary-nav{display:flex;align-items:center;justify-content:flex-end;gap:2px;color:#29313a;font-size:14px;font-weight:670}
.primary-nav a{padding:9px 10px;border-radius:999px;white-space:nowrap}
.primary-nav a:hover,.primary-nav a[aria-current="page"]{color:#0f6f77;background:rgba(23,184,196,.12)}
.lang-switch{display:grid;grid-template-columns:1fr 1fr;padding:3px;border:1px solid rgba(16,19,24,.18);border-radius:999px;background:rgba(255,255,255,.74);flex:0 0 auto}
.lang-switch button{min-width:48px;min-height:32px;border:0;border-radius:999px;color:var(--muted);background:transparent;cursor:pointer;font-size:13px;font-weight:750}
.lang-switch button[aria-pressed="true"]{color:var(--white);background:var(--ink)}
.page-hero{
  height:660px;
  color:var(--white);
  background:
    linear-gradient(90deg,rgba(16,19,24,.94),rgba(16,19,24,.76) 42%,rgba(16,19,24,.28)),
    url("lyra-hero-ai-ios.png") center/cover no-repeat;
  display:flex;
  align-items:flex-start;
}
.page-hero .wrap{padding:74px 0}
.eyebrow{display:flex;align-items:center;gap:12px;margin-bottom:18px;color:#cceff1;font-size:13px;font-weight:800;text-transform:uppercase}
.eyebrow::before{content:"";width:38px;height:2px;background:var(--amber)}
h1{max-width:780px;font-size:56px;line-height:1.05;font-weight:830;letter-spacing:0}
.lede{max-width:690px;margin-top:22px;color:#edf5f4;font-size:19px;line-height:1.75}
section{padding:76px 0}
.section-head{display:grid;grid-template-columns:.9fr 1.1fr;gap:48px;align-items:end;margin-bottom:32px}
.kicker{color:#0f7780;font-size:13px;font-weight:830;text-transform:uppercase}
h2{margin-top:10px;font-size:40px;line-height:1.15;font-weight:820;letter-spacing:0}
.section-copy{color:var(--muted);font-size:17px;line-height:1.8;max-width:690px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);grid-auto-rows:1fr;gap:16px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);grid-auto-rows:1fr;gap:16px}
.panel,.card{
  min-width:0;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:var(--white);
}
.panel{padding:30px}
.card{display:flex;flex-direction:column;padding:26px;min-height:240px}
.card b,.panel b{display:block;color:var(--green);font-size:13px;text-transform:uppercase;letter-spacing:.02em}
.card h3,.panel h3{margin-top:12px;font-size:24px;line-height:1.22}
.card h3{min-height:58px}
.card p,.panel p{margin-top:12px;color:var(--muted);font-size:15px;line-height:1.75}
.card p{display:-webkit-box;overflow:hidden;-webkit-line-clamp:5;-webkit-box-orient:vertical}
.dark-band{background:#141815;color:var(--white)}
.dark-band h2{color:var(--white)}
.dark-band .section-copy{color:#c8d2cd}
.dark-band .card{background:#1d241f;border-color:rgba(255,255,255,.16)}
.dark-band .card p{color:#cbd7d1}
.dark-band .card b{color:var(--amber)}
.case-list{display:grid;gap:16px}
.case-item{
  display:grid;
  grid-template-columns:220px minmax(0,1fr) 260px;
  gap:28px;
  align-items:start;
  min-height:188px;
  padding:28px 0;
  border-top:1px solid var(--line);
}
.case-item:last-child{border-bottom:1px solid var(--line)}
.case-label{color:var(--green);font-size:13px;font-weight:830;text-transform:uppercase}
.case-item h3{font-size:26px;line-height:1.22}
.case-item p{color:var(--muted);font-size:15px;line-height:1.75}
.meta-list{list-style:none;color:#39434b;font-size:14px}
.meta-list li{margin-bottom:8px}
.meta-list strong{color:var(--ink)}
.steps{display:grid;grid-template-columns:repeat(4,1fr);grid-auto-rows:1fr;gap:1px;background:rgba(16,19,24,.14);border:1px solid rgba(16,19,24,.14);border-radius:var(--radius);overflow:hidden}
.step{display:flex;flex-direction:column;padding:26px;background:var(--white);min-height:250px}
.step b{color:var(--amber)}
.step h3{margin-top:16px;font-size:21px}
.step p{margin-top:10px;color:var(--muted);font-size:15px}
.cta{
  display:flex;
  flex-direction:column;
  justify-content:center;
  align-items:flex-start;
  min-height:310px;
  padding:42px;
  border-radius:var(--radius);
  color:var(--white);
  background:var(--ink);
  box-shadow:var(--shadow);
}
.cta h2{color:var(--white);margin:0;font-size:36px}
.cta p{margin-top:16px;color:#d9e3df;max-width:760px}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:46px;
  margin-top:26px;
  padding:0 18px;
  border:1px solid var(--white);
  border-radius:999px;
  color:var(--ink);
  background:var(--white);
  font-size:14px;
  font-weight:790;
}
footer{color:#d5dbd8;background:#101318}
.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:28px 0;font-size:14px}
.footer-brand{display:flex;align-items:center;gap:10px;color:var(--white);font-weight:760}
.footer-brand img{width:28px;height:28px}
.footer-links{display:flex;flex-wrap:wrap;gap:16px;color:#bbc6c0}
[data-lang-block="zh"]{display:none}
body.lang-zh [data-lang-block="en"]{display:none}
body.lang-zh [data-lang-block="zh"]{display:block}
body.lang-zh .grid-2[data-lang-block="zh"],
body.lang-zh .grid-3[data-lang-block="zh"],
body.lang-zh .case-list[data-lang-block="zh"],
body.lang-zh .steps[data-lang-block="zh"]{display:grid}
@media(max-width:1040px){
  .header-inner{align-items:flex-start;flex-direction:column;padding:14px 0;gap:12px}
  .header-actions{width:100%;justify-content:space-between}
  .primary-nav{justify-content:flex-start;overflow-x:auto;white-space:nowrap;padding-bottom:2px}
  h1{font-size:46px}
  h2{font-size:34px}
  .section-head,.grid-2{grid-template-columns:1fr}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .case-item{grid-template-columns:160px 1fr}
  .case-item p{grid-column:2}
  .steps{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:700px){
  .wrap{width:min(100% - 30px,var(--maxw))}
  .header-actions{align-items:center;flex-direction:row;gap:6px}
  .primary-nav{flex:1;max-width:calc(100% - 100px)}
  .primary-nav a{padding:7px}
  .lang-switch button{min-width:42px;min-height:30px}
  .page-hero{height:auto;min-height:390px;background-position:61% center}
  .page-hero .wrap{padding:46px 0}
  h1{font-size:38px}
  .lede{font-size:16px}
  section{padding:58px 0}
  h2{font-size:30px}
  .grid-3,.steps{grid-template-columns:1fr}
  .card{min-height:0}
  .card h3{min-height:0}
  .case-item{grid-template-columns:1fr;gap:12px}
  .case-item p{grid-column:auto}
  .cta{min-height:0;padding:28px}
  .cta h2{font-size:29px}
  .btn{width:100%}
  .footer-inner{align-items:flex-start;flex-direction:column}
}