/* 漫蛙4 · manwa4.net.cn — 柔和产品（重构：居中构图 + 大圆角，7 区块） */

:root{
  --bg:#FBF8F2;
  --panel:#F2EEE4;
  --mint:#CFE3D6;
  --green:#285C43;
  --ink:#1E241F;
  --body:#545A55;
  --dim:#8C938D;
  --line:#E2DDD1;
  --line2:#CFC8B8;
  --sans:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,sans-serif;
  --mono:Consolas,"SFMono-Regular",Menlo,monospace;
  --w:1080px;
  --pad:104px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--body);
  font-family:var(--sans);font-size:15px;line-height:1.9;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
h1,h2,h3,p,ol,ul,dl,dd,figure{margin:0}
ol,ul{padding:0;list-style:none}
.skip{position:absolute;left:-9999px}
.skip:focus{left:16px;top:12px;z-index:99;background:var(--green);color:#fff;padding:8px 14px}

/* ---------- 页头 ---------- */
.hd{background:var(--bg)}
.hd-in{
  max-width:var(--w);margin:0 auto;padding:0 32px;
  height:70px;display:flex;align-items:center;gap:36px;
}
.brand{display:flex;align-items:center;gap:9px}
.logo{width:26px;height:26px;display:block}
.logo img{width:100%;height:100%;object-fit:contain}
.brand-t{font-size:16px;font-weight:700;color:var(--ink);letter-spacing:.02em}
.nav{display:flex;gap:26px;margin-left:auto}
.nav a{font-size:13px;color:var(--body)}
.nav a:hover{color:var(--green)}
.hd-cta{
  font-size:13px;color:#fff;background:var(--green);
  padding:9px 22px;border-radius:999px;font-weight:500;
}

/* ---------- 首屏：居中 ---------- */
.hero{max-width:var(--w);margin:0 auto;padding:88px 32px 0;text-align:center}
.kicker{
  font-family:var(--mono);font-size:10.5px;letter-spacing:.2em;
  color:var(--dim);text-transform:uppercase;
}
.hero h1{
  margin-top:26px;
  font-size:clamp(42px,6.2vw,74px);
  line-height:1.2;font-weight:700;letter-spacing:-.02em;color:var(--ink);
}
.lead{
  margin:28px auto 0;max-width:28em;
  font-size:16px;line-height:1.9;color:var(--body);
}
.hero-tags{
  margin-top:26px;display:flex;justify-content:center;gap:10px;flex-wrap:wrap;
}
.hero-tags li{
  font-size:12.5px;color:var(--green);
  background:var(--mint);border-radius:999px;
  padding:6px 16px;
}
.stage{margin:56px auto 0;max-width:960px}
.stage img{
  width:100%;height:auto;border-radius:24px;
  box-shadow:0 24px 60px -28px rgba(40,92,67,.30);
}
.dl{margin-top:48px;display:flex;justify-content:center;gap:12px;flex-wrap:wrap}
.dl-p{
  display:inline-block;padding:14px 34px;border-radius:999px;
  background:var(--green);color:#fff;font-size:14.5px;font-weight:500;
  transition:background .18s;
}
.dl-p:not([hidden]){display:inline-block}
.dl-p:hover{background:#1F4A36}
.dl:not(:has(.dl-p:not([hidden]))){display:none}
.dl:not(:has(.dl-p:not([hidden]))) + .dl-note{display:none}
.dl-note{margin-top:16px;font-size:12.5px;color:var(--dim)}

/* ---------- 区块 ---------- */
.sec{padding:var(--pad) 0}
.sec-in{max-width:var(--w);margin:0 auto;padding:0 32px}
.sec h2{
  font-size:clamp(26px,3.1vw,38px);
  line-height:1.35;font-weight:700;letter-spacing:-.015em;color:var(--ink);
}
.sec-lead{margin-top:16px;max-width:32em;font-size:15px;color:var(--body)}
.note{margin-top:28px;font-size:13px;color:var(--dim)}

/* ---------- 三件事 ---------- */
#three .sec-in{text-align:center}
.trio{
  margin-top:56px;
  display:grid;grid-template-columns:repeat(3,1fr);gap:0;
  text-align:left;
}
.trio li{padding:0 34px}
.trio li:first-child{padding-left:0}
.trio li:last-child{padding-right:0}
.trio li + li{border-left:1px solid var(--line)}
.trio b{
  display:block;font-size:19px;color:var(--ink);font-weight:700;margin-bottom:12px;
}
.trio p{font-size:14px;line-height:1.85;color:var(--body)}

/* ---------- 阅读器 ---------- */
.sec-mint{background:var(--panel)}
#reader .sec-in{
  display:grid;grid-template-columns:1fr 420px;gap:72px;align-items:center;
}
.knobs{margin-top:40px}
.knobs li{
  display:grid;grid-template-columns:96px 1fr;gap:20px;align-items:baseline;
  padding:16px 0;border-top:1px solid var(--line2);
}
.knobs b{font-size:15px;color:var(--ink);font-weight:600}
.knobs span{font-size:13.5px;color:var(--body)}
.reader-fig{margin:0}
.reader-fig img{width:100%;height:auto;border-radius:24px}

/* ---------- 封面带 ---------- */
.sec-band{padding:var(--pad) 0}
.band-head{max-width:var(--w);margin:0 auto 48px;padding:0 32px}
.band-head h2{
  font-size:clamp(26px,3.1vw,38px);
  line-height:1.35;font-weight:700;letter-spacing:-.015em;color:var(--ink);
}
.band-head p{margin-top:14px;font-size:15px;color:var(--body)}
.band{max-width:var(--w);margin:0 auto;padding:0 32px}
.band img{width:100%;height:auto;border-radius:20px}

/* ---------- 同步 ---------- */
.sync{margin-top:48px;border-top:1px solid var(--line2);max-width:760px}
.sync div{
  display:grid;grid-template-columns:120px 1fr;gap:32px;align-items:baseline;
  padding:22px 0;border-bottom:1px solid var(--line);
}
.sync dt{font-size:16px;font-weight:600;color:var(--green)}
.sync dd{font-size:14px;line-height:1.8;color:var(--body)}

/* ---------- 问答 ---------- */
.faq{margin-top:44px;max-width:760px}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{
  display:flex;justify-content:space-between;align-items:center;gap:24px;
  padding:20px 0;cursor:pointer;list-style:none;
  font-size:15.5px;color:var(--ink);
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:18px;color:var(--dim);line-height:1}
.faq details[open] summary::after{content:"−";color:var(--green)}
.faq details p{padding:0 0 22px;max-width:52em;font-size:14px;line-height:1.9;color:var(--body)}

/* ---------- 收口 ---------- */
.cta{padding:0 32px var(--pad)}
.cta-in{
  max-width:calc(var(--w) - 64px);margin:0 auto;
  background:var(--green);color:#fff;
  border-radius:28px;padding:52px 56px;
  display:grid;grid-template-columns:1fr auto;gap:8px 48px;align-items:center;
}
.cta h2{font-size:clamp(24px,2.8vw,32px);font-weight:700;letter-spacing:-.01em}
.cta p{grid-column:1;font-size:14px;color:#BBD2C6}
.cta .btn{
  grid-column:2;grid-row:1 / span 2;
  background:#fff;color:var(--green);
  padding:15px 34px;border-radius:999px;
  font-size:14.5px;font-weight:600;white-space:nowrap;
  transition:background .18s;
}
.cta .btn:hover{background:var(--mint)}

/* ---------- 页脚 ---------- */
.ft{padding:0 0 44px}
.ft-in{
  max-width:var(--w);margin:0 auto;padding:0 32px;
  display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap;
}
.ft-brand{display:flex;align-items:center;gap:9px}
.ft-brand img{width:22px;height:22px;object-fit:contain}
.ft-brand p{display:flex;align-items:baseline;gap:9px}
.ft-brand b{font-size:14px;color:var(--ink)}
.ft-brand span{font-family:var(--mono);font-size:9.5px;letter-spacing:.18em;color:var(--dim)}
.ft-nav{display:flex;gap:20px;flex-wrap:wrap}
.ft-nav a{font-size:12.5px;color:var(--dim)}
.ft-nav a:hover{color:var(--ink)}
.ft-line{
  max-width:var(--w);margin:26px auto 0;padding:16px 32px 0;
  border-top:1px solid var(--line);
  font-size:11.5px;line-height:1.7;color:var(--dim);
}

/* ---------- 404 ---------- */
.nf{max-width:var(--w);margin:0 auto;padding:100px 32px;text-align:center}
.nf h1{
  margin-top:22px;font-size:clamp(38px,5vw,64px);line-height:1.2;
  font-weight:700;letter-spacing:-.02em;color:var(--ink);
}
.nf h1 em{font-style:normal;color:var(--green)}
.nf-acts{margin-top:34px;display:flex;justify-content:center;gap:12px;flex-wrap:wrap}
.nf-acts .btn{
  background:var(--green);color:#fff;padding:14px 30px;border-radius:999px;
  font-size:14px;font-weight:500;
}
.nf-acts .btn-s{background:transparent;color:var(--green);border:1px solid var(--line2)}
.nf-acts .btn-s:hover{background:var(--mint);border-color:var(--mint)}

/* ---------- 窄屏 ---------- */
@media (max-width:1080px){
  :root{--pad:84px}
  #reader .sec-in{grid-template-columns:1fr 340px;gap:48px}
}

@media (max-width:860px){
  .nav{display:none}
  .hero{padding:60px 24px 0}
  .stage{margin-top:44px}
  .sec-in,.hd-in,.band-head,.ft-in,.ft-line,.band{padding-left:24px;padding-right:24px}
  .cta{padding-left:24px;padding-right:24px}
  .trio{grid-template-columns:1fr;margin-top:40px}
  .trio li{padding:22px 0}
  .trio li + li{border-left:0;border-top:1px solid var(--line)}
  .trio li:first-child{padding-top:0}
  #reader .sec-in{grid-template-columns:1fr;gap:40px}
  .reader-fig{order:-1}
  .sync{margin-top:36px}
  .sync div{grid-template-columns:88px 1fr;gap:20px}
  .cta-in{grid-template-columns:1fr;padding:36px 28px;border-radius:22px}
  .cta .btn{grid-column:1;grid-row:auto;margin-top:20px;text-align:center}
  .nf{padding:72px 24px}
  .nf-acts{flex-direction:column}
  .nf-acts .btn{text-align:center}
}

@media (max-width:640px){
  :root{--pad:60px}
  .hero h1{font-size:clamp(36px,10vw,46px)}
  .sec h2,.band-head h2{font-size:clamp(23px,6.2vw,28px)}
  .lead{font-size:15px}
  .stage{margin-top:36px}
  .stage img{border-radius:18px}
  .dl{margin-top:36px}
  .dl-p{padding:13px 26px;font-size:14px}
  .knobs li{grid-template-columns:1fr;gap:4px}
  .band img{border-radius:14px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .dl-p,.cta .btn,.hd-cta,.nav a,.ft-nav a{transition:none}
}