/* 汗汗漫画官网落地页样式 */
:root{
  --primary:#FF6B35;
  --primary-dark:#E8551F;
  --primary-soft:#FFF3EC;
  --dark:#20233A;
  --text:#454A60;
  --text-light:#7B8098;
  --border:#ECECF3;
  --bg:#FFFFFF;
  --bg-soft:#F7F8FC;
  --radius:16px;
  --shadow:0 6px 24px rgba(32,35,58,.06);
  --shadow-hover:0 14px 32px rgba(255,107,53,.16);
  --nav-h:64px;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  color:var(--text);
  background:var(--bg);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit}
img{max-width:100%;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
section{padding:80px 0}
section[id]{scroll-margin-top:calc(var(--nav-h) + 8px)}

/* 通用按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:13px 30px;font-size:16px;font-weight:600;color:#fff;
  background:var(--primary);border-radius:999px;text-decoration:none;
  transition:background .25s,transform .25s,box-shadow .25s;
}
.btn:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.btn-lg{padding:15px 36px;font-size:17px}

/* 版本号角标 */
.ver{
  display:inline-block;vertical-align:middle;margin-left:10px;padding:3px 14px;
  font-size:15px;font-weight:700;color:#fff;background:var(--primary);border-radius:999px;
}

/* 通用卡片 */
.card{
  background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);
  transition:transform .25s,box-shadow .25s,border-color .25s;
}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover);border-color:transparent}

/* 顶部导航 */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:rgba(255,255,255,.94);border-bottom:1px solid var(--border);
}
.nav-inner{height:var(--nav-h);display:flex;align-items:center;gap:28px}
.logo{font-size:22px;font-weight:800;color:var(--dark);text-decoration:none;letter-spacing:1px;white-space:nowrap}
.logo:hover{color:var(--primary)}
.nav-menu{display:flex;align-items:center;gap:2px;margin-right:auto}
.nav-menu a{
  padding:8px 11px;font-size:14px;color:var(--text);text-decoration:none;
  border-radius:8px;transition:color .2s,background .2s;
}
.nav-menu a:hover{color:var(--primary);background:var(--primary-soft)}
.nav-menu a.active{color:var(--primary);font-weight:600}
.btn-nav{
  padding:8px 18px;font-size:14px;font-weight:600;color:#fff;
  background:var(--primary);border-radius:999px;text-decoration:none;white-space:nowrap;
  transition:background .25s,transform .25s;
}
.btn-nav:hover{background:var(--primary-dark);transform:translateY(-1px)}

/* 首屏 Hero */
.hero{
  padding:calc(var(--nav-h) + 60px) 0 84px;
  background:linear-gradient(180deg,var(--primary-soft) 0%,var(--bg) 100%);
}
.hero-inner{display:grid;grid-template-columns:1.1fr .9fr;gap:60px;align-items:center}
.hero h1{font-size:44px;line-height:1.25;color:var(--dark);font-weight:800}
.hero-desc{margin:22px 0 34px;max-width:520px;font-size:17px;color:var(--text)}
.hero-btns{display:flex;gap:16px;flex-wrap:wrap}
.hero-img{max-width:340px;margin:0 auto}
.hero-img img{border-radius:var(--radius);box-shadow:var(--shadow)}
.hero-img img,.work-card img{width:100%;height:auto}

/* 区块标题 */
.sec-head{text-align:center;margin-bottom:48px}
.sec-head h2{font-size:32px;font-weight:800;color:var(--dark)}
.sec-head p{margin-top:10px;color:var(--text-light)}

/* 作品预览 */
.works{background:var(--bg-soft)}
.works-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.work-card{padding:0;overflow:hidden}

/* 产品介绍 */
.intro-inner{display:grid;grid-template-columns:1.05fr .95fr;gap:60px;align-items:center}
.intro-text h2{font-size:32px;font-weight:800;color:var(--dark);margin-bottom:18px}
.intro-text p{font-size:15px;color:var(--text);margin-bottom:14px}
.intro-points{list-style:none;display:flex;flex-direction:column;gap:14px}
.intro-points li{
  display:flex;align-items:center;gap:12px;padding:16px 18px;
  background:var(--bg);border:1px solid var(--border);border-radius:12px;
  font-size:15px;font-weight:600;color:var(--dark);
  transition:transform .25s,box-shadow .25s;
}
.intro-points li::before{
  content:"✓";flex-shrink:0;width:26px;height:26px;border-radius:50%;
  background:var(--primary-soft);color:var(--primary);
  display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:800;
}
.intro-points li:hover{transform:translateY(-4px);box-shadow:var(--shadow)}

/* 核心功能 */
.features{background:var(--bg-soft)}
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature-card{padding:30px 26px}
.feature-icon{
  width:52px;height:52px;border-radius:14px;background:var(--primary-soft);
  display:flex;align-items:center;justify-content:center;font-size:26px;margin-bottom:18px;
}
.feature-card h3{font-size:18px;font-weight:700;color:var(--dark);margin-bottom:10px}
.feature-card p{font-size:14px;color:var(--text-light)}

/* 优势对比 */
.compare-box{border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;background:var(--bg)}
.cmp-row{display:grid;grid-template-columns:170px 1fr 1fr}
.cmp-row+.cmp-row{border-top:1px solid var(--border)}
.cmp-cell{padding:18px 22px;font-size:15px;line-height:1.6}
.cmp-label{background:var(--bg-soft);font-weight:600;color:var(--dark)}
.cmp-us{background:var(--primary-soft);color:var(--dark);font-weight:600;border-left:3px solid var(--primary)}
.cmp-us::before{content:"✓ ";color:var(--primary);font-weight:800}
.cmp-other{color:var(--text-light)}
.cmp-other::before{content:"✕ ";color:#C2C6D6;font-weight:800}
.cmp-head .cmp-cell{background:var(--bg-soft);font-weight:700;color:var(--dark)}
.cmp-head .cmp-us{background:var(--primary);color:#fff;border-left:none}
.cmp-head .cmp-us::before,.cmp-head .cmp-other::before{content:""}

/* 平台数据 */
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.stat-card{padding:38px 20px;text-align:center}
.stat-num{font-size:42px;font-weight:800;color:var(--primary);line-height:1.2}
.stat-label{margin-top:10px;font-size:15px;color:var(--text)}

/* 用户评价 */
.reviews{background:var(--bg-soft)}
.reviews-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.review-card{padding:26px}
.rv-top{display:flex;align-items:center;gap:12px}
.rv-avatar{
  width:44px;height:44px;border-radius:50%;background:var(--primary);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:700;flex-shrink:0;
}
.review-card:nth-child(2) .rv-avatar{background:#4F8CFF}
.review-card:nth-child(3) .rv-avatar{background:#22B98A}
.review-card:nth-child(4) .rv-avatar{background:#9B6CF2}
.review-card:nth-child(5) .rv-avatar{background:#F2A33C}
.review-card:nth-child(6) .rv-avatar{background:#E8607C}
.rv-name{font-size:15px;font-weight:700;color:var(--dark)}
.rv-stars{font-size:13px;color:#FFB400;letter-spacing:2px;margin-top:2px}
.rv-text{margin-top:14px;font-size:14px;color:var(--text);line-height:1.8}

/* 版本更新 */
.version-card{max-width:760px;margin:0 auto;padding:34px 36px}
.ver-top{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-bottom:20px}
.ver-badge{
  padding:6px 18px;background:var(--primary);color:#fff;
  border-radius:999px;font-size:16px;font-weight:700;
}
.ver-date{font-size:14px;color:var(--text-light)}
.changelog{list-style:none;display:flex;flex-direction:column;gap:12px}
.changelog li{display:flex;gap:12px;font-size:15px;color:var(--text);line-height:1.7}
.changelog li::before{content:"";flex-shrink:0;width:8px;height:8px;border-radius:50%;background:var(--primary);margin-top:9px}

/* FAQ 折叠问答 */
.faq-list{max-width:780px;margin:0 auto}
.faq-item{
  border:1px solid var(--border);border-radius:var(--radius);background:var(--bg);
  margin-bottom:14px;overflow:hidden;transition:box-shadow .25s,border-color .25s;
}
.faq-item.open{border-color:var(--primary);box-shadow:var(--shadow)}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;gap:16px;width:100%;
  padding:18px 22px;background:none;border:none;cursor:pointer;
  font-family:inherit;font-size:16px;font-weight:600;color:var(--dark);text-align:left;
}
.faq-icon{
  flex-shrink:0;width:26px;height:26px;border-radius:50%;background:var(--primary-soft);color:var(--primary);
  display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:700;
  transition:transform .3s;
}
.faq-item.open .faq-icon{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-item.open .faq-a{max-height:300px}
.faq-a p{padding:0 22px 20px;font-size:14px;color:var(--text);line-height:1.8}

/* 下载区域 */
.download{padding:84px 0;background:linear-gradient(180deg,var(--bg) 0%,var(--primary-soft) 100%)}
.download-inner{text-align:center}
.download h1{font-size:36px;font-weight:800;color:var(--dark)}
.dl-meta{display:flex;justify-content:center;gap:28px;margin:16px 0 34px;font-size:14px;color:var(--text-light)}
.dl-btns{display:flex;justify-content:center;gap:18px}
.dl-tip{margin-top:26px;font-size:15px;color:var(--text)}

/* 页脚 */
.footer{padding:30px 0;background:var(--dark);text-align:center;font-size:14px;color:#AEB3C6}
.footer a{color:#fff;text-decoration:none;transition:color .2s}
.footer a:hover{color:var(--primary)}

/* 返回顶部 */
.back-top{
  position:fixed;right:24px;bottom:32px;z-index:99;width:44px;height:44px;border-radius:50%;
  background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;
  font-size:20px;text-decoration:none;box-shadow:var(--shadow-hover);
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .3s,transform .3s,visibility .3s;
}
.back-top.show{opacity:1;visibility:visible;transform:none}
.back-top:hover{background:var(--primary-dark)}

/* 滚动入场动画 */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}

/* 平板适配 */
@media (max-width:1024px){
  .hero h1{font-size:36px}
  .hero-inner{gap:40px}
  .works-grid{grid-template-columns:repeat(2,1fr)}
  .features-grid{grid-template-columns:repeat(2,1fr)}
  .reviews-grid{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .cmp-row{grid-template-columns:130px 1fr 1fr}
  .cmp-cell{padding:16px 18px;font-size:14px}
}

/* 手机适配 */
@media (max-width:768px){
  .container{padding:0 20px}
  section{padding:52px 0}
  .nav-inner{gap:12px}
  .nav-menu{display:none}
  .btn-nav{margin-left:auto;padding:8px 16px;font-size:14px}

  .hero{padding:calc(var(--nav-h) + 28px) 0 48px}
  .hero-inner{grid-template-columns:1fr;gap:32px;text-align:center}
  .hero h1{font-size:30px}
  .ver{font-size:13px;margin-left:6px;padding:2px 10px}
  .hero-desc{margin:16px auto 28px;font-size:15px}
  .hero-btns{flex-direction:column;gap:14px}
  .hero-btns .btn{width:100%}
  .hero-img{max-width:240px}

  .sec-head{margin-bottom:32px}
  .sec-head h2{font-size:26px}
  .intro-inner{grid-template-columns:1fr;gap:32px}
  .works-grid{grid-template-columns:1fr;gap:18px}
  .features-grid{grid-template-columns:1fr;gap:18px}
  .stats-grid{gap:16px}
  .stat-num{font-size:32px}
  .reviews-grid{grid-template-columns:1fr;gap:18px}

  .cmp-head{display:none}
  .cmp-row{grid-template-columns:1fr}
  .cmp-cell{padding:14px 18px}
  .cmp-cell+.cmp-cell{border-top:1px dashed var(--border)}
  .cmp-us::before{content:attr(data-label) " ";color:var(--primary);font-weight:800}
  .cmp-other::before{content:attr(data-label) " ";color:var(--text-light);font-weight:600}

  .version-card{padding:24px 20px}
  .faq-q{font-size:15px;padding:16px 18px}
  .faq-a p{padding:0 18px 18px}

  .download{padding:56px 0}
  .download h1{font-size:26px}
  .dl-meta{font-size:12px;gap:12px;white-space:nowrap}
  .dl-btns{flex-direction:column;gap:14px}
  .dl-btns .btn{width:100%}
  .dl-tip{font-size:13px}

  .back-top{right:16px;bottom:20px;width:40px;height:40px;font-size:18px}
}