:root{
  --pink:#F5316B;
  --orange:#FF8A3D;
  --ink:#17171B;
  --ink2:#26262C;
  --gray:#6E6A72;
  --line:#E7E3E6;
  --tint:#FFF4EF;
  --tint2:#FFE9E1;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  color:var(--ink);background:#fff;line-height:1.85;font-size:16px;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{line-height:1.3;font-weight:800}
.wrap{width:100%;max-width:1140px;margin:0 auto;padding:0 26px}
.doc{max-width:860px;margin:0 auto}

/* ============ 顶栏 ============ */
.hd{
  position:sticky;top:0;z-index:90;background:#fff;
  border-bottom:2px solid var(--ink);
}
.hd-in{display:flex;align-items:center;height:66px;gap:16px}
.hd-brand{display:flex;align-items:center;gap:10px;flex:none}
.hd-brand img{width:36px;height:36px;border-radius:8px}
.hd-brand b{font-size:18px;font-style:italic;letter-spacing:.3px}
.hd-nav{
  display:flex;gap:2px;margin-left:auto;font-size:13.5px;font-weight:600;color:var(--gray);
}
.hd-nav a{padding:6px 13px;border-radius:4px}
.hd-nav a+a::before{content:"/";color:#D8D2D6;margin-right:22px;margin-left:-16px}
.hd-nav a:hover{color:var(--pink)}
.hd-cta{
  flex:none;background:linear-gradient(100deg,var(--pink),var(--orange));
  color:#fff;font-size:13px;font-weight:700;border-radius:4px;padding:9px 20px;
  box-shadow:0 2px 0 rgba(180,20,60,.35);
}
.hd-menu{display:none;background:none;border:0;cursor:pointer;padding:4px;color:var(--ink)}

/* ============ 英雄区：暗场 + 斜置截图 ============ */
.hero{
  position:relative;overflow:hidden;background:var(--ink);color:#fff;
  padding:64px 0 76px;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(520px 340px at 84% 8%,rgba(245,49,107,.34),transparent 70%),
    radial-gradient(420px 280px at 6% 90%,rgba(255,138,61,.20),transparent 72%),
    repeating-linear-gradient(135deg,rgba(255,255,255,.035) 0 2px,transparent 2px 14px);
}
.hero-in{position:relative;display:grid;grid-template-columns:1.02fr .98fr;gap:40px;align-items:center}
.kick{
  display:inline-block;font-size:11px;letter-spacing:2.6px;font-weight:700;
  color:#fff;background:var(--pink);padding:4px 12px;border-radius:3px;margin-bottom:18px;
}
.hero h1{font-size:64px;font-style:italic;letter-spacing:-1px;margin-bottom:12px}
.hero h1 span{
  background:linear-gradient(100deg,var(--pink),var(--orange));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero .lead{font-size:19px;font-weight:700;color:#FFD9C9;margin-bottom:16px}
.hero .desc{font-size:15px;color:rgba(255,255,255,.74);margin-bottom:26px}
.acts{display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  background:linear-gradient(100deg,var(--pink),var(--orange));color:#fff;
  padding:13px 30px;border-radius:5px;font-weight:800;font-size:15px;
  box-shadow:0 6px 0 rgba(160,20,55,.45);
}
.btn svg{width:17px;height:17px}
.btn:hover{filter:brightness(1.05)}
.ghost{
  display:inline-flex;align-items:center;padding:12px 22px;border-radius:5px;
  border:1px solid rgba(255,255,255,.34);color:rgba(255,255,255,.86);font-size:14px;
}
.ghost:hover{border-color:var(--pink);color:#fff}

/* 斜置截图叠放 */
.stack{position:relative;height:400px}
.shot-a{
  position:absolute;right:0;top:0;width:74%;border:5px solid #fff;border-radius:6px;
  overflow:hidden;transform:rotate(-3.5deg);box-shadow:0 26px 46px rgba(0,0,0,.4);
}
.shot-a img{width:100%;aspect-ratio:4/3;object-fit:cover}
.shot-b{
  position:absolute;left:0;bottom:4px;width:52%;border:4px solid #fff;border-radius:6px;
  overflow:hidden;transform:rotate(4deg);box-shadow:0 20px 36px rgba(0,0,0,.42);
}
.shot-b img{width:100%;aspect-ratio:4/3;object-fit:cover}
.badge{
  position:absolute;right:6px;bottom:52px;background:#fff;color:var(--ink);
  border-radius:6px;padding:10px 14px;font-size:11.5px;line-height:1.5;
  box-shadow:0 12px 26px rgba(0,0,0,.3);
}
.badge b{display:block;font-size:15px;color:var(--pink)}

/* ============ 排行条 ============ */
.rank{background:var(--tint);border-bottom:1px solid var(--line)}
.rank-in{display:grid;grid-template-columns:repeat(3,1fr)}
.rank div{
  padding:20px 24px;border-right:1px solid #F3D9CE;display:flex;align-items:center;gap:14px;
}
.rank div:last-child{border-right:0}
.rank em{
  font-style:normal;font-family:"SFMono-Regular",Consolas,monospace;
  font-size:12px;font-weight:700;color:#fff;background:var(--ink);
  width:28px;height:28px;border-radius:50%;display:flex;align-items:center;justify-content:center;flex:none;
}
.rank b{display:block;font-size:15px}
.rank span{font-size:12px;color:var(--gray)}

/* ============ 通用区块 ============ */
.sec{padding:64px 0}
.sec-tint{background:var(--tint);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-h{margin-bottom:32px}
.sec-h .tag{
  display:inline-block;font-size:10px;letter-spacing:3px;color:#fff;background:var(--pink);
  padding:2px 10px;border-radius:2px;margin-bottom:10px;
}
.sec-h h2{font-size:30px;margin-bottom:8px}
.sec-h h2 em{font-style:normal;color:var(--pink)}
.sec-h p{font-size:15px;color:var(--gray)}

/* ============ 入口：流程线 ============ */
.steps{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.steps::before{
  content:"";position:absolute;left:6%;right:6%;top:17px;height:2px;
  background:repeating-linear-gradient(90deg,var(--pink) 0 8px,transparent 8px 16px);
}
.step{position:relative}
.dot{
  width:36px;height:36px;border-radius:50%;background:#fff;border:2px solid var(--pink);
  color:var(--pink);font-weight:800;font-size:13px;
  display:flex;align-items:center;justify-content:center;margin-bottom:14px;
  font-family:"SFMono-Regular",Consolas,monospace;position:relative;z-index:1;
}
.step h4{font-size:16.5px;margin-bottom:5px}
.step p{font-size:14px;color:var(--gray)}
.step code{
  font-family:"SFMono-Regular",Consolas,monospace;font-size:13px;
  background:var(--tint2);color:#B7164A;padding:1px 5px;border-radius:3px;
}
.enote{
  margin-top:26px;font-size:13.5px;color:#8A5A46;background:#fff;
  border-left:3px solid var(--orange);padding:12px 18px;
}

/* ============ 特色：硬线网格 ============ */
.spec{
  display:grid;grid-template-columns:repeat(3,1fr);
  border-top:2px solid var(--ink);border-left:1px solid var(--line);
}
.spec .cell{
  border-right:1px solid var(--line);border-bottom:1px solid var(--line);
  padding:26px 24px 24px;
}
.spec .cell:nth-child(1),
.spec .cell:nth-child(2),
.spec .cell:nth-child(3){background:#fff}
.spec .cell:nth-child(4),
.spec .cell:nth-child(5),
.spec .cell:nth-child(6){background:var(--tint)}
.num{
  font-family:"SFMono-Regular",Consolas,monospace;font-size:12px;font-weight:700;
  color:var(--pink);letter-spacing:1px;display:block;margin-bottom:8px;
}
.cell h4{font-size:17px;margin-bottom:6px}
.cell p{font-size:13.8px;color:var(--gray)}

/* ============ 界面：横向胶片 ============ */
.rail{
  display:flex;gap:16px;overflow-x:auto;padding-bottom:10px;
  scroll-snap-type:x mandatory;
}
.rail figure{
  flex:0 0 calc((100% - 48px)/4);scroll-snap-align:start;
  border:1px solid var(--line);border-radius:5px;background:#fff;overflow:hidden;
}
.rail img{width:100%;aspect-ratio:3/4;object-fit:cover}
.rail figcaption{padding:12px 14px 14px}
.rail figcaption b{
  display:block;font-size:13.5px;margin-bottom:2px;
}
.rail figcaption p{font-size:12.5px;color:var(--gray)}
.rail::-webkit-scrollbar{height:6px}
.rail::-webkit-scrollbar-thumb{background:#E2CDc4;border-radius:9px}
.guide{
  margin-top:28px;border:1px solid var(--ink);border-radius:6px;padding:22px 24px;
}
.guide h4{font-size:16px;font-style:italic;color:var(--pink)}
.guide ol{list-style:none;counter-reset:g;display:grid;gap:8px}
.guide li{
  counter-increment:g;font-size:13.5px;color:var(--gray);
  padding-left:26px;position:relative;
}
.guide li::before{
  content:counter(g);position:absolute;left:0;top:1px;
  font-family:"SFMono-Regular",Consolas,monospace;font-size:11px;font-weight:700;
  color:#fff;background:var(--ink);width:18px;height:18px;border-radius:3px;
  display:flex;align-items:center;justify-content:center;
}

/* ============ FAQ：details ============ */
.qlist{border-bottom:1px solid var(--line)}
details.q{border-top:1px solid var(--line)}
details.q summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;gap:12px;
  padding:18px 2px;
}
details.q summary::-webkit-details-marker{display:none}
details.q summary .qn{
  flex:none;font-family:"SFMono-Regular",Consolas,monospace;font-size:12px;
  font-weight:700;color:#fff;background:var(--pink);border-radius:3px;
  padding:2px 7px;
}
details.q summary h3{font-size:16px;flex:1}
details.q summary .pm{
  flex:none;width:24px;height:24px;border-radius:50%;border:1px solid var(--line);
  color:var(--pink);display:flex;align-items:center;justify-content:center;
  font-size:15px;line-height:1;font-family:"SFMono-Regular",Consolas,monospace;
}
details.q summary .pm::before{content:"+"}
details.q[open] summary .pm::before{content:"−"}
details.q p{
  font-size:14px;color:var(--gray);padding:0 0 20px 48px;
}
details.q[open]{background:linear-gradient(90deg,rgba(245,49,107,.05),transparent 62%)}

/* ============ 评价：论坛帖式两列 ============ */
.rwrap{display:grid;grid-template-columns:1fr 1fr;gap:0 34px;border-top:2px solid var(--ink)}
.rrow{
  display:grid;grid-template-columns:74px 1fr;gap:16px;
  padding:22px 0;border-bottom:1px solid var(--line);
}
.rav{
  width:56px;height:56px;border-radius:6px;background:var(--ink);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:800;
  font-style:italic;
}
.rmeta{display:flex;align-items:baseline;gap:10px;margin-bottom:5px;flex-wrap:wrap}
.rmeta b{font-size:13.5px}
.rmeta time{font-size:11px;color:#A9A2A8;font-family:"SFMono-Regular",Consolas,monospace}
.rrow blockquote{font-size:13.5px;color:var(--gray);line-height:1.8}

/* ============ 下载：暗色大 banner ============ */
.dlsec{padding:0}
.dlband{
  position:relative;overflow:hidden;background:var(--ink);color:#fff;
  padding:64px 0;
}
.dlband::before{
  content:"51";position:absolute;left:-2%;top:50%;transform:translateY(-50%);
  font-size:240px;font-weight:900;font-style:italic;line-height:1;
  color:transparent;-webkit-text-stroke:1px rgba(245,49,107,.35);
}
.dl-in{
  position:relative;display:grid;grid-template-columns:1fr auto;gap:36px;align-items:center;
}
.dlogo{display:flex;align-items:center;gap:14px;margin-bottom:14px}
.dlogo img{width:56px;height:56px;border-radius:10px}
.dlogo em{
  font-style:normal;font-size:11px;letter-spacing:3.4px;color:rgba(255,255,255,.55);
}
.dlband h2{font-size:32px;font-style:italic;margin-bottom:8px}
.dlband h2 em{font-style:normal;color:#FF9B6B}
.dlband p{font-size:13.5px;color:rgba(255,255,255,.7);max-width:600px}
.dm{display:flex;gap:7px;flex-wrap:wrap;margin-top:16px}
.dm span{
  font-size:11px;border:1px solid rgba(255,255,255,.28);border-radius:3px;
  padding:2px 9px;color:rgba(255,255,255,.78);
}
.dlband .btn{white-space:nowrap}

/* ============ 页脚 ============ */
.ft{background:#fff;border-top:3px solid var(--ink);padding:38px 0 28px;font-size:12.5px;color:var(--gray)}
.ft-in{text-align:center}
.ft-top{display:flex;align-items:center;justify-content:center;gap:9px;margin-bottom:12px;color:var(--ink)}
.ft-top img{width:28px;height:28px;border-radius:7px}
.ft-top strong{font-style:italic;font-size:15px}
.ft p{max-width:680px;margin:0 auto 16px;line-height:1.95}
.ft-links{display:flex;gap:18px;justify-content:center;flex-wrap:wrap;margin-bottom:16px;font-size:12px}
.ft-links a:hover{color:var(--pink)}
.ft-copy{font-size:11.5px;color:#A9A2A8;line-height:1.9}

/* ============ 返回顶部 ============ */
.backtop{
  position:fixed;right:24px;bottom:88px;z-index:70;
  width:42px;height:42px;border-radius:5px;
  background:var(--ink);color:#fff;border:0;
  display:flex;align-items:center;justify-content:center;cursor:pointer;
  box-shadow:0 6px 16px rgba(0,0,0,.24);
}
.backtop:hover{background:var(--pink)}

/* ============ 响应式 ============ */
@media (max-width:940px){
  .hero-in{grid-template-columns:1fr;gap:34px}
  .stack{height:340px;max-width:520px;margin:0 auto}
  .spec{grid-template-columns:1fr 1fr}
  .steps{grid-template-columns:1fr 1fr;gap:26px}
  .steps::before{display:none}
  .rail figure{flex:0 0 calc((100% - 32px)/3)}
  .rwrap{grid-template-columns:1fr}
  .guide{grid-template-columns:1fr;gap:12px}
  .dl-in{grid-template-columns:1fr;gap:24px}
  .dlband::before{font-size:170px;left:auto;right:-3%}
}
@media (max-width:720px){
  .hd-nav{
    display:none;position:absolute;top:66px;left:0;right:0;
    background:#fff;border-bottom:2px solid var(--ink);
    padding:8px 18px;flex-direction:column;gap:0;margin-left:0;
  }
  .hd-nav.open{display:flex}
  .hd-nav a{padding:10px 4px}
  .hd-nav a+a::before{display:none}
  .hd-menu{display:block;margin-left:auto}
  .hd-cta{padding:8px 14px}
  .hero{padding:40px 0 50px}
  .hero h1{font-size:46px}
  .hero .lead{font-size:17px}
  .stack{height:300px}
  .badge{display:none}
  .rank-in{grid-template-columns:1fr}
  .rank div{border-right:0;border-bottom:1px solid #F3D9CE}
  .rank div:last-child{border-bottom:0}
  .sec{padding:46px 0}
  .sec-h h2{font-size:24px}
  .spec{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .rail figure{flex:0 0 82%}
  .rwrap{grid-template-columns:1fr}
  .dlband{padding:44px 0}
  .dlband h2{font-size:25px}
  .backtop{right:16px;bottom:76px}
}