/* yy漫画 - ytfjghq.cn - 阅读器模拟骨架，直角硬阴影，四色 #181818/#FFF/#F04818/#16A6C9 */
*{margin:0;padding:0;box-sizing:border-box}
:root{
  --ink:#181818;--paper:#FFFFFF;--brand:#F04818;--contra:#16A6C9;
  --mist-w:#FFF7F3;--mist-c:#F4F6F7;--mist-h:#FBF7F4;--dark:#1A1A1A;--darker:#0E0E0E;
  --line:#181818;
}
html{scroll-behavior:smooth;overflow-x:hidden;width:100%}
body{font-family:"PingFang SC","Microsoft YaHei",system-ui,sans-serif;color:var(--ink);background:var(--paper);line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:hidden;width:100%;max-width:100vw}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}
.wrap{max-width:1180px;margin:0 auto;padding:0 24px}
.fade{opacity:0;transform:translateY(24px);transition:opacity .6s ease,transform .6s ease}
.fade.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.fade{opacity:1;transform:none;transition:none}}

/* ===== 顶栏 ===== */
.mast{position:sticky;top:0;z-index:50;background:var(--paper);border-bottom:2px solid var(--ink)}
.mast-bar{display:flex;align-items:center;gap:18px;height:64px}
.mast-brand{display:flex;align-items:center;gap:10px;font-weight:900;font-size:20px}
.mast-brand img{width:36px;height:36px;object-fit:contain;border:2px solid var(--ink)}
.mast-links{display:flex;gap:20px;margin-left:auto;font-size:14px;font-weight:600}
.mast-links a{padding:6px 2px;border-bottom:2px solid transparent;transition:border-color .2s}
.mast-links a:hover{border-bottom-color:var(--brand)}
.mast-tap{display:inline-flex;align-items:center;gap:6px;padding:9px 18px;background:var(--brand);color:#fff;font-weight:700;font-size:14px;border:2px solid var(--ink);box-shadow:3px 3px 0 var(--ink)}
.mast-tap:hover{background:var(--ink)}
.mast-burger{display:none;width:42px;height:42px;background:none;border:2px solid var(--ink);flex-direction:column;justify-content:center;align-items:center;gap:4px;cursor:pointer}
.mast-burger span{display:block;width:20px;height:2px;background:var(--ink)}
.mast-strip{display:flex;height:6px}
.mast-strip i{flex:1}
.mast-strip .g{background:var(--brand)}
.mast-strip .p{background:var(--contra)}
.mast-strip .k{background:var(--ink)}

/* ===== 英雄区 阅读器模拟 ===== */
.hero{background:var(--mist-w);padding:56px 0 64px;border-bottom:1px solid var(--ink)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;color:var(--brand);letter-spacing:.04em}
.eyebrow i{display:inline-block;width:10px;height:10px;background:var(--contra)}
.hero-text h1{font-size:54px;line-height:1.05;font-weight:900;margin:14px 0 16px;letter-spacing:-.01em}
.lead{font-size:16px;color:#3a3a3a;max-width:520px;margin-bottom:20px}
.tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:22px}
.tags span{padding:5px 11px;font-size:12.5px;font-weight:600;border:1.5px solid var(--ink)}
.tag-a{background:var(--brand);color:#fff}
.tag-b{background:var(--contra);color:#fff}
.tag-c{background:var(--ink);color:#fff}
.action{display:flex;gap:14px;margin-bottom:26px}
.btn-primary{display:inline-flex;align-items:center;gap:6px;padding:14px 30px;background:var(--brand);color:#fff;font-weight:800;font-size:16px;border:2px solid var(--ink);box-shadow:4px 4px 0 var(--ink)}
.btn-primary:hover{background:var(--ink)}
.btn-ghost{display:inline-flex;align-items:center;padding:14px 22px;background:transparent;color:var(--ink);font-weight:700;font-size:15px;border:2px solid var(--ink)}
.btn-ghost:hover{background:var(--ink);color:#fff}
.metrics{display:flex;gap:28px;border-top:2px solid var(--ink);padding-top:18px}
.metrics div{display:flex;flex-direction:column}
.metrics b{font-size:26px;font-weight:900;color:var(--ink)}
.metrics span{font-size:12px;color:#666}

/* 阅读器手机框 */
.hero-visual{display:flex;justify-content:center}
.reader{width:320px;background:#fff;border:3px solid var(--ink);box-shadow:14px 10px 0 var(--ink);display:flex;flex-direction:column}
.reader-top{display:flex;align-items:center;justify-content:space-between;padding:10px 12px;background:var(--ink);color:#fff;font-size:12.5px;font-weight:700}
.reader-back,.reader-menu{font-size:18px;font-weight:900}
.reader-page{position:relative;background:#1d1d1d;overflow:hidden}
.reader-page img{width:100%;height:380px;object-fit:cover;object-position:top}
.reader-tap{position:absolute;top:0;bottom:0;width:50%}
.reader-tap-l{left:0}
.reader-tap-r{right:0}
.reader-ctrl{display:flex;align-items:center;gap:8px;padding:10px 12px;background:#f3f3f3;border-top:2px solid var(--ink)}
.reader-prev,.reader-next{font-size:12px;font-weight:700;color:var(--ink);background:none;border:none;cursor:pointer;padding:4px 6px}
.reader-prev:hover,.reader-next:hover{color:var(--brand)}
.reader-prog{flex:1;height:6px;background:#ddd;position:relative}
.reader-prog i{display:block;height:100%;background:var(--brand)}
.reader-foot{padding:8px 12px;background:var(--mist-w);font-size:11.5px;color:#555;border-top:1px solid #ddd}

/* ===== 界面展示 横向滚动轨 ===== */
.shot{background:var(--dark);color:#fff;padding:52px 0 56px;border-bottom:2px solid var(--ink);overflow:hidden}
.shot-head{text-align:center;margin-bottom:32px}
.shot-eyebrow{display:inline-block;padding:4px 12px;font-size:12px;font-weight:700;background:var(--brand);color:#fff}
.shot-head h2{font-size:30px;font-weight:900;margin:14px 0 8px}
.shot-head p{color:#bbb;font-size:14px}
.shot-track{display:flex;gap:18px;overflow-x:auto;padding:8px 24px 24px;scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch;scrollbar-width:thin;scrollbar-color:var(--contra) transparent;width:100%;max-width:100%;min-width:0;box-sizing:border-box}
.shot-track::-webkit-scrollbar{height:6px}
.shot-track::-webkit-scrollbar-thumb{background:var(--contra)}
.shot-card{position:relative;flex:none;width:230px;scroll-snap-align:start;background:#fff;color:var(--ink);border:2px solid #fff;box-shadow:-8px 8px 0 var(--brand)}
.shot-card img{width:100%;height:360px;object-fit:cover;object-position:top}
.shot-card b{display:block;padding:12px 14px;font-size:14px;font-weight:800;text-align:center;border-top:2px solid var(--ink)}
.shot-no{position:absolute;top:10px;left:10px;width:30px;height:30px;display:flex;align-items:center;justify-content:center;background:var(--contra);color:#fff;font-size:13px;font-weight:900;z-index:2}

/* ===== 核心特色 左右交错双列 ===== */
.feat{background:var(--paper);padding:60px 0;border-bottom:1px solid var(--ink)}
.feat-head{text-align:center;margin-bottom:40px}
.feat-eyebrow{display:inline-block;padding:4px 12px;font-size:12px;font-weight:700;background:var(--ink);color:#fff}
.feat-head h2{font-size:30px;font-weight:900;margin:14px 0 8px}
.feat-head p{color:#666;font-size:14px}
.feat-list{display:flex;flex-direction:column;gap:0}
.feat-row{display:flex;align-items:stretch;gap:0;border-bottom:1.5px solid #e4e4e4}
.feat-row:last-child{border-bottom:none}
.feat-ico{flex:none;width:88px;display:flex;align-items:center;justify-content:center;background:var(--mist-c);border-right:2px solid var(--ink)}
.feat-r .feat-ico{border-right:none;border-left:2px solid var(--ink);order:2}
.feat-ico span{width:46px;height:46px;display:flex;align-items:center;justify-content:center;background:var(--brand);color:#fff;font-size:20px;font-weight:900}
.feat-l .feat-ico span{background:var(--brand)}
.feat-row:nth-child(2) .feat-ico span{background:var(--contra)}
.feat-row:nth-child(3) .feat-ico span{background:var(--ink)}
.feat-row:nth-child(4) .feat-ico span{background:var(--contra)}
.feat-row:nth-child(5) .feat-ico span{background:var(--brand)}
.feat-row:nth-child(6) .feat-ico span{background:var(--ink)}
.feat-body{flex:1;padding:22px 26px;display:flex;flex-direction:column;justify-content:center}
.feat-body b{font-size:19px;font-weight:900;margin-bottom:6px}
.feat-body p{font-size:14px;color:#444}

/* ===== 使用指南 横向时间轴 ===== */
.guide{background:var(--mist-c);padding:60px 0;border-bottom:2px solid var(--ink);overflow:hidden}
.guide-head{text-align:center;margin-bottom:40px}
.guide-eyebrow{display:inline-block;padding:4px 12px;font-size:12px;font-weight:700;background:var(--brand);color:#fff}
.guide-head h2{font-size:30px;font-weight:900;margin:14px 0 8px}
.guide-head p{color:#555;font-size:14px}
.tl-h{position:relative;overflow-x:auto;padding:8px 0 16px;-webkit-overflow-scrolling:touch;scrollbar-width:thin;width:100%;max-width:100%;min-width:0;box-sizing:border-box}
.tl-h::-webkit-scrollbar{height:6px}
.tl-h::-webkit-scrollbar-thumb{background:var(--ink)}
.tl-rail{position:absolute;top:30px;left:0;right:0;height:3px;background:var(--ink)}
.tl-steps{display:flex;gap:0;min-width:max-content;position:relative}
.tl-step{flex:1;min-width:240px;max-width:280px;padding:0 18px;text-align:center}
.tl-dot{display:inline-flex;align-items:center;justify-content:center;width:60px;height:60px;background:var(--brand);color:#fff;font-size:24px;font-weight:900;border:3px solid var(--ink);box-shadow:6px -6px 0 var(--contra);position:relative;z-index:2}
.tl-step:nth-child(2) .tl-dot{background:var(--contra);box-shadow:-6px -6px 0 var(--brand)}
.tl-step:nth-child(3) .tl-dot{background:var(--ink);box-shadow:6px 6px 0 var(--contra)}
.tl-step:nth-child(4) .tl-dot{background:var(--contra);box-shadow:-6px 6px 0 var(--brand)}
.tl-step b{display:block;font-size:18px;font-weight:900;margin:18px 0 8px}
.tl-step p{font-size:13.5px;color:#444}

/* ===== FAQ 分类标签问答 ===== */
.faq{background:var(--paper);padding:60px 0;border-bottom:1px solid var(--ink)}
.faq-head{text-align:center;margin-bottom:32px}
.faq-eyebrow{display:inline-block;padding:4px 12px;font-size:12px;font-weight:700;background:var(--ink);color:#fff}
.faq-head h2{font-size:30px;font-weight:900;margin:14px 0 8px}
.faq-head p{color:#666;font-size:14px}
.faq-tabs{display:flex;gap:10px;justify-content:center;margin-bottom:28px;flex-wrap:wrap}
.faq-tab{padding:8px 20px;font-size:14px;font-weight:700;background:transparent;color:var(--ink);border:2px solid var(--ink);cursor:pointer}
.faq-tab.on{background:var(--brand);color:#fff;border-color:var(--ink)}
.faq-group{display:none}
.faq-group.on{display:block}
.qa{background:#fff;border:2px solid var(--ink);box-shadow:10px 6px 0 var(--ink);margin-bottom:16px}
.qa summary{list-style:none;padding:16px 22px;font-size:16px;font-weight:800;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:12px}
.qa summary::-webkit-details-marker{display:none}
.qa summary::after{content:"+";font-size:22px;font-weight:900;color:var(--brand);flex:none}
.qa[open] summary::after{content:"−"}
.qa p{padding:0 22px 18px;font-size:14px;color:#444}

/* ===== 用户评价 网格卡片墙 ===== */
.rev{background:var(--mist-h);padding:60px 0;border-bottom:2px solid var(--ink)}
.rev-head{text-align:center;margin-bottom:36px}
.rev-eyebrow{display:inline-block;padding:4px 12px;font-size:12px;font-weight:700;background:var(--brand);color:#fff}
.rev-head h2{font-size:30px;font-weight:900;margin:14px 0 8px}
.rev-head p{color:#555;font-size:14px}
.rev-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.rev-card{background:#fff;border:2px solid var(--ink);box-shadow:-10px 6px 0 var(--contra);padding:20px 22px;display:flex;flex-direction:column;gap:12px}
.rev-top{display:flex;align-items:center;gap:10px}
.rev-ava{flex:none;width:40px;height:40px;display:flex;align-items:center;justify-content:center;background:var(--brand);color:#fff;font-size:18px;font-weight:900}
.rev-card:nth-child(even) .rev-ava{background:var(--contra)}
.rev-who{flex:1;display:flex;flex-direction:column}
.rev-who b{font-size:14px;font-weight:800}
.rev-who time{font-size:12px;color:#888}
.rev-star{color:var(--brand);font-size:16px;letter-spacing:1px}
.rev-card p{font-size:13.5px;color:#3a3a3a;line-height:1.7}

/* ===== 下载条 居中堆叠 ===== */
.dl{background:var(--darker);color:#fff;padding:60px 0 66px;border-top:2px solid var(--brand)}
.dl-stack{text-align:center;display:flex;flex-direction:column;align-items:center;gap:14px}
.dl-title{font-size:32px;font-weight:900;line-height:1.2}
.dl-sub{font-size:14px;color:#bbb}
.dl-btn{display:inline-flex;align-items:center;gap:8px;padding:16px 42px;background:var(--brand);color:#fff;font-weight:800;font-size:18px;border:2px solid #fff;box-shadow:0 12px 0 #000;margin-top:6px}
.dl-btn:hover{background:#fff;color:var(--brand)}
.dl-chips{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;margin-top:8px}
.dl-chips span{padding:5px 14px;font-size:12px;font-weight:600;border:1.5px solid #444;color:#ccc}

/* ===== 页脚 ===== */
.foot{background:#0a0a0a;color:#bbb;padding:40px 0 28px}
.foot-inner{display:flex;flex-wrap:wrap;align-items:center;gap:20px}
.foot-brand{display:flex;align-items:center;gap:10px}
.foot-brand img{width:36px;height:36px;object-fit:contain;border:2px solid #fff}
.foot-brand b{color:#fff;font-size:18px;font-weight:900}
.foot-brand span{display:block;font-size:12px;color:#888}
.foot-links{display:flex;flex-wrap:wrap;gap:16px;margin-left:auto;font-size:13px}
.foot-links a{color:#bbb;border-bottom:1px solid transparent}
.foot-links a:hover{color:#fff;border-bottom-color:var(--brand)}
.foot-legal{flex-basis:100%;border-top:1px solid #222;padding-top:16px;margin-top:6px}
.foot-legal p{font-size:12px;color:#777;margin-bottom:4px}

/* ===== 返回顶部 ===== */
.back-top{position:fixed;right:20px;bottom:20px;width:46px;height:46px;background:var(--brand);color:#fff;border:2px solid var(--ink);display:flex;align-items:center;justify-content:center;cursor:pointer;z-index:60;box-shadow:3px 3px 0 var(--ink);opacity:0;visibility:hidden;transition:opacity .3s,visibility .3s}
.back-top.show{opacity:1;visibility:visible}
.back-top:hover{background:var(--ink)}

/* ===== 响应式 ===== */
@media (max-width:980px){
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-text h1{font-size:42px}
  .rev-grid{grid-template-columns:repeat(2,1fr)}
  .mast-links{display:none;position:absolute;top:64px;left:0;right:0;background:var(--paper);flex-direction:column;gap:0;border-bottom:2px solid var(--ink);padding:8px 24px}
  .mast-links.open{display:flex}
  .mast-links a{padding:12px 0;border-bottom:1px solid #eee;width:100%}
  .mast-burger{display:flex}
}
@media (max-width:768px){
  .wrap{padding:0 16px}
  .hero{padding:40px 0 44px}
  .hero-text h1{font-size:36px}
  .lead{font-size:15px}
  .reader{width:100%;max-width:300px}
  .reader-page img{height:340px}
  .tags{gap:6px}
  .tags span{padding:4px 9px;font-size:12px}
  .metrics{gap:18px}
  .metrics b{font-size:22px}
  .shot{padding:40px 0 44px}
  .shot-head h2{font-size:24px}
  .shot-card{width:200px}
  .shot-card img{height:300px}
  .feat,.guide,.faq,.rev{padding:44px 0}
  .feat-head h2,.guide-head h2,.faq-head h2,.rev-head h2{font-size:24px}
  .feat-row{flex-direction:column}
  .feat-ico{width:100%;height:64px;border-right:none;border-bottom:2px solid var(--ink)}
  .feat-r .feat-ico{order:0;border-left:none;border-bottom:2px solid var(--ink)}
  .feat-ico span{width:46px;height:46px}
  .feat-body{padding:18px}
  .tl-step{min-width:200px}
  .rev-grid{grid-template-columns:1fr}
  .rev-card{box-shadow:-6px 4px 0 var(--contra)}
  .dl-title{font-size:24px}
  .qa{box-shadow:6px 4px 0 var(--ink)}
  .qa summary{padding:14px 16px;font-size:14.5px}
  .qa p{padding:0 16px 14px;font-size:13.5px}
}
@media (max-width:420px){
  .hero-text h1{font-size:30px}
  .reader{box-shadow:8px 6px 0 var(--ink)}
  .shot-card{width:180px}
  .shot-card img{height:280px}
  .action{flex-direction:column;gap:10px}
  .action a{width:100%;justify-content:center}
  .metrics{gap:14px}
  .metrics b{font-size:20px}
}