/* 漫蛙4 · manwa4.org.cn
   浅灰 + 珊瑚；左图右文开场，编号卡片 + 错位截图，下载做成三张入口卡 */

:root{
  --bg:#F4F5F7;
  --card:#FFFFFF;
  --ink:#171A1F;
  --body:#545B64;
  --dim:#8A919B;
  --line:#E5E7EB;
  --brand:#E4453A;
  --brand-d:#B8302A;
  --brand-l:#F0604F;
  --tint:#FBF3F2;
  --w:1140px;
  --r:20px;
  --sh:0 14px 32px -22px rgba(30,20,20,.32);
}

*{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(244,245,247,.92);
  backdrop-filter:saturate(1.4) blur(10px);
  border-bottom:1px solid var(--line);
}
.top.on{box-shadow:0 8px 22px -20px rgba(30,20,20,.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:10px;
  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：左图右文 ---------- */
.hero{padding:64px 0 76px}
.hero-in{
  display:grid;grid-template-columns:minmax(0,420px) minmax(0,1fr);
  gap:64px;align-items:center;
}
.hero-l{min-width:0}
.frame{
  background:linear-gradient(170deg,#FBEEEC 0%,#F3E4E2 55%,#EDDAD7 100%);
  border-radius:28px;padding:28px;
}
.frame img{
  width:100%;height:auto;border-radius:16px;
  box-shadow:0 28px 54px -34px rgba(60,30,26,.6);
}
.kick{font-size:12px;letter-spacing:.18em;font-weight:700;color:var(--brand);text-transform:uppercase}
.hero h1{margin-top:16px;font-size:clamp(36px,4.2vw,52px);line-height:1.18;font-weight:800}
.lead{margin-top:20px;font-size:16px;line-height:1.95;max-width:26em}
.acts{margin-top:30px;display:flex;flex-wrap:wrap;gap:12px}
.btn{
  height:50px;padding:0 26px;border-radius:11px;
  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 -16px rgba(228,69,58,.9)}
.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:#D6D9DE;transform:translateY(-1px)}
.meta{list-style:none;display:flex;flex-wrap:wrap;margin:26px 0 0;padding:0;font-size:13px;color:var(--dim)}
.meta li{padding:0 14px;border-left:1px solid var(--line)}
.meta li:first-child{padding-left:0;border-left:0}

/* ---------- 区块通用 ---------- */
.sec{padding:84px 0}
.sec-tint{background:#fff}
.sec-h{max-width:38em;margin:0 auto 44px;text-align:center}
.sec-h h2{margin-top:12px;font-size:clamp(24px,2.5vw,32px);line-height:1.32;font-weight:800}
.sec-h .sub{margin-top:12px;font-size:14.5px;color:var(--dim)}

/* ---------- 功能：编号三列 ---------- */
.feat{
  list-style:none;margin:0;padding:0;
  display:grid;grid-template-columns:repeat(3,1fr);gap:0;
  border-top:1px solid var(--line);
}
.feat li{
  padding:26px 26px 28px 0;border-bottom:1px solid var(--line);
}
.feat li:nth-child(3n+2),.feat li:nth-child(3n+3){padding-left:26px}
.feat .n{
  font-size:12px;font-weight:800;letter-spacing:.14em;color:var(--brand);
  font-variant-numeric:tabular-nums;
}
.feat h3{margin-top:10px;font-size:16.5px;font-weight:800}
.feat p{margin-top:8px;font-size:14px;line-height:1.85}

/* ---------- 界面：错落四图 ---------- */
.shots{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;align-items:end}
.shots figure{margin:0}

.dev{
  background:#fff;border:1px solid var(--line);border-radius:15px;
  padding:9px;box-shadow:var(--sh);
}
.dev img{width:100%;height:auto;border-radius:9px}
.shots figcaption{margin-top:12px;font-size:13px}
.shots figcaption b{color:var(--ink);font-weight:700}
.shots figcaption span{color:var(--dim);margin-left:8px}

/* ---------- 下载：三张入口卡 ---------- */
.dl{background:var(--tint);padding:76px 0 68px;border-top:1px solid #F0E0DD;border-bottom:1px solid #F0E0DD}
.dl-h{text-align:center;max-width:38em;margin:0 auto 38px}
.dl-h h2{font-size:clamp(24px,2.5vw,32px);font-weight:800}
.dl-h p{margin-top:12px;font-size:14.5px;color:var(--body)}
.ch{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.chc{
  background:#fff;border:1px solid #EFE2DF;border-radius:var(--r);
  padding:24px 24px 22px;text-decoration:none;
  box-shadow:0 16px 34px -26px rgba(60,30,26,.4);
  transition:transform .18s,box-shadow .18s,border-color .18s;
}
.chc:not([hidden]){display:block}
.chc:hover{transform:translateY(-3px);box-shadow:0 22px 40px -26px rgba(60,30,26,.5);border-color:#E4CDC9}
.chc-i{
  width:44px;height:44px;border-radius:12px;background:var(--tint);
  display:flex;align-items:center;justify-content:center;
}
.chc-i svg{width:22px;height:22px;fill:none;stroke:var(--brand);stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.chc b{display:block;margin-top:16px;font-size:16.5px;font-weight:800;color:var(--ink)}
.chc i{display:block;margin-top:6px;font-style:normal;font-size:13.5px;color:var(--body)}
.chc-a{display:block;margin-top:16px;font-size:13.5px;font-weight:700;color:var(--brand)}
.ch:not(:has(.chc:not([hidden]))){display:none}
.dl:not(:has(.chc:not([hidden]))) .dl-h p,
.dl:not(:has(.chc:not([hidden]))) .dl-note{display:none}
.dl-note{margin-top:30px;text-align:center;font-size:12.5px;color:var(--dim)}

/* ---------- 安装步骤 ---------- */
.steps{
  list-style:none;margin:0;padding:0;
  display:grid;grid-template-columns:repeat(3,1fr);gap:28px;
}
.steps li{position:relative;padding-top:22px;border-top:1px solid var(--line)}
.steps h3{font-size:16.5px;font-weight:800;display:flex;align-items:center;gap:10px}
.steps .n{
  display:inline-flex;align-items:center;justify-content:center;
  width:26px;height:26px;border-radius:8px;background:var(--brand);
  color:#fff;font-size:11.5px;font-weight:800;flex:none;
}
.steps p{margin-top:10px;font-size:14px;line-height:1.85}

/* ---------- 问答 ---------- */
.faq{max-width:800px;margin:0 auto}
.faq details{
  background:#fff;border:1px solid var(--line);border-radius:13px;
  padding:0 22px;margin-bottom:12px;
}
.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 details[open]{border-color:#E9DAD7;background:#fff}
.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:44px 0 56px}
  .hero-in{grid-template-columns:1fr;gap:34px}
  .hero-l{order:2}
  .frame{padding:20px;border-radius:22px}
  .sec{padding:58px 0}
  .sec-h{margin-bottom:30px}
  .feat{grid-template-columns:1fr 1fr}
  .feat li{padding:20px 18px 22px 0}
  .feat li:nth-child(3n+2),.feat li:nth-child(3n+3){padding-left:0}
  .feat li:nth-child(even){padding-left:18px}
  .shots{grid-template-columns:1fr 1fr;gap:14px}
  .ch{grid-template-columns:1fr;gap:12px}
  .steps{grid-template-columns:1fr;gap:20px}
  .dl{padding:56px 0 50px}
  .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%}
  .feat{grid-template-columns:1fr}
  .feat li{padding:18px 0 20px 0}
  .feat li:nth-child(even){padding-left:0}
  .shots{grid-template-columns:1fr 1fr}
  .ft-in{grid-template-columns:1fr}
}