/* 点明AI云键盘 官网 —— 深靛蓝科技风，与 App 图标同色系 */
:root{
  --bg:#0B0A1F;
  --bg-2:#12102E;
  --card:rgba(255,255,255,.045);
  --line:rgba(255,255,255,.10);
  --text:#EDEBFF;
  --muted:#A5A1C9;
  --brand:#6D6BF5;
  --brand-2:#3A207A;
  --gold:#FDE047;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  background:var(--bg);color:var(--text);line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}

/* 顶部导航 */
.nav{
  position:sticky;top:0;z-index:10;
  display:flex;align-items:center;justify-content:space-between;
  padding:16px 32px;
  background:rgba(11,10,31,.78);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px}
.brand img{border-radius:9px}
.nav nav{display:flex;align-items:center;gap:26px;font-size:15px;color:var(--muted)}
.nav nav a:hover{color:var(--text)}
.btn-nav{
  padding:8px 18px;border-radius:999px;
  background:linear-gradient(135deg,var(--brand),#8B5CF6);color:#fff;font-weight:600;
}

/* Hero */
.hero{
  display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center;
  max-width:1180px;margin:0 auto;padding:90px 32px 70px;
  position:relative;
}
.hero::before{
  content:"";position:absolute;inset:-10% -20% 40% -20%;
  background:radial-gradient(60% 60% at 30% 20%,rgba(109,107,245,.30),transparent 70%),
             radial-gradient(50% 50% at 80% 0%,rgba(139,92,246,.22),transparent 70%);
  filter:blur(40px);pointer-events:none;z-index:-1;
}
.eyebrow{letter-spacing:.18em;font-size:12px;color:var(--brand);font-weight:700;margin-bottom:18px}
.hero h1{font-size:clamp(34px,4.4vw,56px);line-height:1.18;font-weight:800;letter-spacing:-.02em}
.grad{background:linear-gradient(100deg,#8B5CF6,#6D6BF5 40%,#38BDF8);-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{margin-top:22px;font-size:17px;color:var(--muted);max-width:46ch}
.cta{margin-top:34px;display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:13px 26px;border-radius:12px;font-weight:600;font-size:15px;transition:.2s}
.btn-primary{background:linear-gradient(135deg,var(--brand),#8B5CF6);color:#fff;box-shadow:0 10px 30px -12px rgba(109,107,245,.9)}
.btn-primary:hover{transform:translateY(-2px)}
.btn-ghost{border:1px solid var(--line);color:var(--text)}
.btn-ghost:hover{border-color:var(--brand)}
.btn-lg{padding:16px 40px;font-size:16px}

.metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:52px;max-width:520px}
.metrics dt{font-size:26px;font-weight:800;color:#fff}
.metrics dd{font-size:13px;color:var(--muted);margin-top:4px}
.metrics small{color:#6E6A93}

.hero-visual{position:relative;display:flex;justify-content:center}
.hero-visual img{
  width:min(340px,100%);border-radius:26px;
  border:1px solid var(--line);
  box-shadow:0 40px 80px -40px rgba(0,0,0,.9),0 0 0 1px rgba(255,255,255,.04);
}

/* 通用区块 */
.section{max-width:1180px;margin:0 auto;padding:76px 32px}
.section h2{font-size:clamp(26px,3vw,36px);font-weight:800;letter-spacing:-.01em}
.section-lead{color:var(--muted);margin-top:10px;margin-bottom:42px}
.section-alt{border-top:1px solid var(--line);border-bottom:1px solid var(--line)}

.cards{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.card{
  background:var(--card);border:1px solid var(--line);border-radius:20px;padding:30px;
  transition:.25s;
}
.card:hover{border-color:rgba(109,107,245,.55);transform:translateY(-3px)}
.card-icon{font-size:28px;margin-bottom:14px}
.card h3{font-size:21px;font-weight:700}
.card-sub{margin:6px 0 16px;font-size:13px;color:var(--brand);font-weight:600;letter-spacing:.02em}
.card p{color:var(--muted);font-size:15px}
.card ul{margin:18px 0 0;padding-left:18px;color:var(--muted);font-size:14.5px}
.card li{margin:7px 0}
.card-link{display:inline-block;margin-top:20px;font-weight:600;color:var(--brand);font-size:14.5px}
.card-link.muted{color:#6E6A93;font-weight:500}

.points{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;margin-top:34px}
.points h4{font-size:16px;font-weight:700;margin-bottom:8px}
.points p{color:var(--muted);font-size:14.5px}

/* 下载 */
.download{display:flex;justify-content:center}
.dl-box{
  width:min(620px,100%);text-align:center;
  background:linear-gradient(180deg,rgba(109,107,245,.13),rgba(255,255,255,.03));
  border:1px solid rgba(109,107,245,.32);border-radius:24px;padding:46px 36px;
}
.dl-box img{margin:0 auto 20px;border-radius:20px}
.dl-box h2{font-size:26px}
.dl-meta{color:var(--muted);font-size:14px;margin:10px 0 26px}
.dl-hint{color:#7C789F;font-size:13px;margin-top:22px;line-height:1.9}
details{margin-top:26px;text-align:left;background:rgba(0,0,0,.22);border:1px solid var(--line);border-radius:14px;padding:16px 20px}
summary{cursor:pointer;font-weight:600;font-size:14.5px}
details ol{margin:14px 0 0 18px;color:var(--muted);font-size:14px}
details li{margin:8px 0}

/* 页脚 */
footer{
  border-top:1px solid var(--line);padding:40px 32px 56px;text-align:center;color:#6E6A93;font-size:13.5px;
}
.foot-brand{display:flex;align-items:center;justify-content:center;gap:8px;color:var(--text);font-weight:600;margin-bottom:10px;font-size:14.5px}
.foot-brand img{border-radius:5px}
.copy{margin-top:8px;color:#4E4A6E}

/* 响应式 */
@media (max-width:900px){
  .hero{grid-template-columns:1fr;padding-top:60px;text-align:center}
  .hero .lead{margin-left:auto;margin-right:auto}
  .cta{justify-content:center}
  .metrics{margin-left:auto;margin-right:auto}
  .hero-visual{order:-1;margin-bottom:10px}
  .hero-visual img{width:min(260px,70%)}
  .cards,.points{grid-template-columns:1fr}
  .nav{padding:14px 18px}
  .nav nav{gap:16px;font-size:14px}
  .section{padding:56px 20px}
}

/* 下载区二维码 */
.qr-wrap{margin:8px 0 26px}
.qr-plate{display:inline-block;background:#fff;border-radius:16px;padding:14px;line-height:0}
.qr-plate img{width:190px;height:190px}
.qr-tip{color:var(--muted);font-size:13px;margin-top:12px}
.manual-link{margin-top:18px;font-size:14px}
.manual-link a{color:var(--brand);font-weight:600}
.manual-link a:hover{text-decoration:underline}

/* 页脚链接 */
.foot-links{margin:6px 0 10px;font-size:13.5px}
.foot-links a{color:var(--brand)}
.foot-links a:hover{text-decoration:underline}
.foot-links span{margin:0 8px;color:#3A3660}