/* 漫蛙4 · mw4app.cn
   冷白 + 靛蓝；居中开场，白色卡片 + 22px 圆角 + 柔和投影 */

:root{
  --bg:#F7F8FB;
  --card:#FFFFFF;
  --ink:#0F172A;
  --body:#4C5768;
  --dim:#8A94A6;
  --line:#E5E9F2;
  --brand:#2B4BFF;
  --brand-d:#16205E;
  --brand-l:#4A66FF;
  --tint:#EEF1FE;
  --w:1160px;
  --r:22px;
  --sh:0 16px 40px -26px rgba(20,30,70,.35);
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--body);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:15.5px;line-height:1.9;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
h1,h2,h3,h4{margin:0;color:var(--ink);letter-spacing:-.02em}
p{margin:0}
a{color:inherit}
.wrap{max-width:var(--w);margin:0 auto;padding:0 32px}
.skip{position:absolute;left:-9999px;top:0;padding:10px 16px;background:var(--brand);color:#fff;z-index:99;text-decoration:none}
.skip:focus{left:12px;top:12px}

/* ---------- 顶栏 ---------- */
.top{
  position:sticky;top:0;z-index:50;
  background:rgba(247,248,251,.9);
  backdrop-filter:saturate(1.4) blur(10px);
  border-bottom:1px solid var(--line);
}
.top.on{box-shadow:0 8px 24px -20px rgba(20,30,70,.5)}
.top-in{display:flex;align-items:center;gap:28px;height:66px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink)}
.brand img{width:30px;height:30px;border-radius:9px}
.brand b{font-size:16px;font-weight:800}
.top nav{margin-left:auto;display:flex;gap:28px}
.top nav a{font-size:14px;color:var(--body);text-decoration:none;transition:color .18s}
.top nav a:hover{color:var(--brand)}
.top-cta{
  margin-left:8px;height:40px;padding:0 20px;border-radius:11px;
  background:var(--brand);color:#fff;text-decoration:none;
  font-size:14px;font-weight:700;white-space:nowrap;
  display:inline-flex;align-items:center;
  transition:background .18s,transform .16s;
}
.top-cta:hover{background:var(--brand-l);transform:translateY(-1px)}

/* ---------- 首屏 ---------- */
.hero{padding:72px 0 76px;text-align:center;overflow:hidden}
.kick{font-size:12px;letter-spacing:.18em;font-weight:700;color:var(--brand);text-transform:uppercase}
.hero h1{
  margin-top:18px;font-size:clamp(34px,4.2vw,54px);
  line-height:1.2;font-weight:800;
}
.lead{margin:20px auto 0;font-size:16px;line-height:1.95;max-width:34em}
.acts{margin-top:30px;display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.btn{
  height:50px;padding:0 28px;border-radius:12px;
  font-size:15px;font-weight:700;text-decoration:none;
  border:1px solid transparent;white-space:nowrap;
  transition:background .18s,border-color .18s,transform .16s;
}
.btn:not([hidden]){display:inline-flex;align-items:center;justify-content:center}
.btn.btn-p{background:var(--brand);color:#fff;box-shadow:0 12px 26px -14px rgba(43,75,255,.7)}
.btn.btn-p:hover{background:var(--brand-l);transform:translateY(-1px)}
.btn.btn-s{background:#fff;color:var(--ink);border-color:var(--line)}
.btn.btn-s:hover{border-color:#C9D1E4;transform:translateY(-1px)}
.note{margin-top:24px;font-size:13px;color:var(--dim);letter-spacing:.02em}

/* 三台手机扇形 */
.fan{
  display:flex;justify-content:center;align-items:flex-start;
  margin-top:44px;padding-bottom:6px;
}
.fan-p{
  background:#0F1524;border-radius:26px;padding:8px;
  box-shadow:0 30px 60px -34px rgba(10,20,50,.6);
  flex:0 0 auto;width:250px;
}
.fan-p img{width:100%;height:auto;border-radius:19px}
.fan-p:nth-child(1){transform:translate(34px,30px) rotate(-5deg);z-index:1}
.fan-p:nth-child(3){transform:translate(-34px,30px) rotate(5deg);z-index:1}
.fan-m{z-index:3;width:264px;margin-bottom:0}
.fan-m img{border-radius:21px}

/* ---------- 区块通用 ---------- */
.sec{padding:88px 0}
.sec-tint{background:var(--tint)}
.sec-h{max-width:36em;margin:0 auto 44px;text-align:center}
.sec-h h2{margin-top:12px;font-size:clamp(25px,2.6vw,34px);line-height:1.3;font-weight:800}
.sec-h .sub{margin-top:12px;font-size:14.5px;color:var(--dim)}

/* ---------- 功能：横向卡片两列 ---------- */
.feat{
  list-style:none;margin:0;padding:0;
  display:grid;grid-template-columns:1fr 1fr;gap:18px;
}
.feat li{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r);
  padding:24px 24px 22px;display:flex;gap:16px;align-items:flex-start;
  box-shadow:var(--sh);transition:transform .2s,box-shadow .2s;
}
.feat li:hover{transform:translateY(-3px);box-shadow:0 22px 44px -26px rgba(20,30,70,.45)}
.ico{
  width:46px;height:46px;border-radius:14px;background:var(--tint);flex:none;
  display:flex;align-items:center;justify-content:center;
}
.ico svg{width:22px;height:22px;fill:none;stroke:var(--brand);stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.feat h3{font-size:16.5px;font-weight:800}
.feat p{margin-top:7px;font-size:14px;line-height:1.85}

/* ---------- 参数条 ---------- */
.band{background:var(--brand-d);padding:34px 0}
.band-in{
  display:grid;grid-template-columns:repeat(3,1fr);
  gap:0;
}
.band-in > div{padding:0 30px;border-left:1px solid rgba(255,255,255,.16)}
.band-in > div:first-child{padding-left:0;border-left:0}
.band b{display:block;font-size:26px;font-weight:800;color:#fff;line-height:1.2;letter-spacing:-.01em}
.band span{display:block;margin-top:6px;font-size:12.5px;color:#A9B6D8}

/* ---------- 下载卡 ---------- */
.dlcard{
  background:var(--card);border:1px solid var(--line);border-radius:28px;
  padding:46px 40px 38px;text-align:center;max-width:620px;margin:0 auto;
  box-shadow:0 30px 70px -40px rgba(20,30,70,.45);
}
.dl-icon{width:74px;height:74px;border-radius:20px;margin:0 auto 22px}
.dlcard h2{font-size:clamp(24px,2.4vw,30px);font-weight:800}
.dl-sub{margin:12px auto 0;font-size:14.5px;color:var(--dim);max-width:26em}
.stores{
  margin-top:26px;display:grid;grid-template-columns:1fr 1fr;gap:12px;
  max-width:440px;margin-left:auto;margin-right:auto;
}
.store{
  background:var(--brand-d);border-radius:14px;padding:12px 18px 12px 15px;
  text-decoration:none;color:#fff;
  transition:background .18s,transform .16s;
}
.store:not([hidden]){display:flex;align-items:center;gap:12px;justify-content:center}
.store:hover{background:#1D2A78;transform:translateY(-1px)}
.store svg{width:22px;height:22px;flex:none;fill:none;stroke:#A9C0FF;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.store b{display:block;font-size:14.5px;font-weight:700;line-height:1.4;text-align:left}
.store i{display:block;font-style:normal;font-size:11.5px;color:#98A6CC;line-height:1.5;text-align:left}
.stores:not(:has(.store:not([hidden]))){display:none}
.dlcard:not(:has(.store:not([hidden]))) .dl-sub{display:none}
.dl-alt{
  margin-top:16px;font-size:13.5px;color:var(--brand);text-decoration:none;
}
.dl-alt:not([hidden]){display:inline-flex;align-items:center;gap:7px}
.dl-alt svg{width:15px;height:15px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.dl-alt:hover{text-decoration:underline}
.chips{
  list-style:none;display:flex;flex-wrap:wrap;gap:8px;justify-content:center;
  margin:24px 0 0;padding:0;
}
.chips li{
  font-size:12.5px;color:var(--body);background:var(--tint);
  border-radius:999px;padding:5px 14px;
}

/* ---------- 安装步骤 ---------- */
.steps{
  list-style:none;margin:0;padding:0;
  display:grid;grid-template-columns:repeat(3,1fr);gap:20px;
}
.steps li{
  background:var(--card);border:1px solid var(--line);border-radius:18px;
  padding:24px 22px 22px;box-shadow:var(--sh);
}
.steps .n{
  display:inline-flex;align-items:center;justify-content:center;
  width:30px;height:30px;border-radius:9px;background:var(--brand);
  color:#fff;font-size:12.5px;font-weight:800;
}
.steps h3{margin-top:14px;font-size:16.5px;font-weight:800}
.steps p{margin-top:8px;font-size:14px;line-height:1.85}

/* ---------- 问答 ---------- */
.faq{max-width:800px;margin:0 auto}
.faq details{
  background:var(--card);border:1px solid var(--line);border-radius:14px;
  padding:0 22px;margin-bottom:12px;box-shadow:var(--sh);
}
.faq summary{
  list-style:none;cursor:pointer;padding:18px 0;
  font-size:15px;font-weight:700;color:var(--ink);
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"";width:9px;height:9px;flex:none;
  border-right:2px solid var(--dim);border-bottom:2px solid var(--dim);
  transform:rotate(45deg) translateY(-2px);transition:transform .2s;
}
.faq details[open] summary::after{transform:rotate(-135deg) translateY(-2px)}
.faq p{padding:0 0 20px;font-size:14px;line-height:1.9;max-width:52em}

/* ---------- 页脚 ---------- */
.ft{background:#fff;border-top:1px solid var(--line);padding:52px 0 0}
.ft-in{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:32px;padding-bottom:40px}
.ft-b p{margin-top:14px;font-size:13.5px;line-height:1.85;color:var(--dim);max-width:26em}
.ft-c h4{font-size:13px;font-weight:800;letter-spacing:.04em}
.ft-c a,.ft-c span{display:block;margin-top:10px;font-size:13.5px;color:var(--dim);text-decoration:none}
.ft-c a:hover{color:var(--brand)}
.ft-bar{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  border-top:1px solid var(--line);padding:20px 32px 24px;
  font-size:12.5px;color:var(--dim);
}

/* ---------- 404 ---------- */
.nf-page{background:var(--bg)}
.nf-page .top-cta{margin-left:auto}
.nf{padding:88px 0 96px;min-height:58vh;display:flex;align-items:center}
.nf-in{width:100%;max-width:660px;margin:0 auto;text-align:center}
.nf h1{margin-top:16px;font-size:clamp(30px,3.6vw,44px);line-height:1.2;font-weight:800}
.nf .lead{margin:18px auto 0;max-width:34em}
.nf-acts{margin-top:32px;display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.nf-note{margin-top:40px;font-size:12.5px;color:var(--dim);letter-spacing:.04em}

/* ---------- 窄屏 ---------- */
@media (max-width:960px){
  .wrap{padding:0 22px}
  .top nav{display:none}
  .top-cta{margin-left:auto}
  .hero{padding:48px 0 0}
  .sec{padding:60px 0}
  .sec-h{margin-bottom:30px}
  .feat{grid-template-columns:1fr;gap:12px}
  .feat li{padding:20px 18px}
  .band-in{grid-template-columns:1fr;gap:18px}
  .band-in > div{padding:18px 0 0;border-left:0;border-top:1px solid rgba(255,255,255,.16)}
  .band-in > div:first-child{padding-top:0;border-top:0}
  .fan-p{width:180px}
  .fan-p:nth-child(1){transform:translate(24px,20px) rotate(-5deg)}
  .fan-p:nth-child(3){transform:translate(-24px,20px) rotate(5deg)}
  .fan-m{width:196px}
  .steps{grid-template-columns:1fr;gap:14px}
  .dlcard{padding:34px 22px 30px;border-radius:22px}
  .ft-in{grid-template-columns:1fr 1fr;gap:26px}
  .ft-b{grid-column:1 / -1}
  .ft-bar{padding-left:22px;padding-right:22px}
}
@media (max-width:560px){
  .btn{width:100%}
  .stores{grid-template-columns:1fr}
  .fan-p:nth-child(1),.fan-p:nth-child(3){display:none}
  .fan-m{width:236px;margin:0 auto}
  .ft-in{grid-template-columns:1fr}
}