:root{
  --primary:#FF7E3D;
  --primary-dark:#F2631C;
  --primary-soft:#FFF0E4;
  --dark:#2F2A26;
  --text:#423A33;
  --text-sub:#6F645A;
  --border:#F2DFCE;
  --bg:#FFF9F3;
  --card:#FFFFFF;
  --radius:16px;
  --shadow:0 10px 28px rgba(255,126,61,.13);
  --shadow-hover:0 16px 38px rgba(255,126,61,.22);
  --nav-h:66px;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;color:var(--text);background:var(--bg);line-height:1.75;-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%}
a{text-decoration:none;color:inherit}
button{font-family:inherit}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
section[id]{scroll-margin-top:calc(var(--nav-h) + 10px)}

/* 顶部导航 */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(255,249,243,.94);border-bottom:1px solid var(--border);transition:box-shadow .3s}
.nav.scrolled{box-shadow:0 6px 20px rgba(47,42,38,.08)}
.nav-inner{height:var(--nav-h);display:flex;align-items:center;justify-content:space-between;gap:16px}
.logo{display:flex;align-items:center;font-size:22px;font-weight:800;color:var(--dark);letter-spacing:.5px;white-space:nowrap}
.logo-icon{width:26px;height:26px;color:var(--primary);margin-right:6px;flex:0 0 auto}
.nav-links{display:flex;list-style:none;align-items:center;gap:2px}
.nav-links a{display:block;padding:8px 10px;font-size:14px;color:var(--text);border-radius:8px;transition:background .2s,color .2s}
.nav-links a:hover{color:var(--primary);background:var(--primary-soft)}
.nav-dl{font-size:14px;font-weight:600;color:#fff;background:var(--primary);padding:8px 18px;border-radius:999px;white-space:nowrap;transition:background .2s,transform .2s}
.nav-dl:hover{background:var(--primary-dark);transform:translateY(-1px)}

/* 首屏 Hero */
.hero{padding:calc(var(--nav-h) + 70px) 0 84px;background:linear-gradient(180deg,var(--primary-soft),var(--bg))}
.hero-inner{display:flex;align-items:center;gap:64px}
.hero-text{flex:1;min-width:0}
.hero h1{font-size:42px;line-height:1.3;color:var(--dark);font-weight:800}
.hero h1 .ver{font-size:22px;font-weight:700;color:var(--primary);margin-left:10px;vertical-align:middle}
.hero p{margin-top:20px;font-size:17px;color:var(--text-sub);max-width:560px}
.hero-btns{display:flex;gap:16px;margin-top:34px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:14px 34px;border-radius:999px;font-size:16px;font-weight:600;color:#fff;background:var(--primary);border:1px solid transparent;cursor:pointer;transition:background .25s,transform .25s,box-shadow .25s}
.btn:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:var(--shadow)}
.btn-outline{background:transparent;color:var(--primary);border-color:var(--primary)}
.btn-outline:hover{background:var(--primary-soft);box-shadow:none}
.hero-img{flex:0 0 auto;width:300px}
.hero-img img{width:100%;height:auto;border-radius:var(--radius);box-shadow:0 20px 48px rgba(255,126,61,.24)}

/* 通用区块 */
.section{padding:84px 0}
.section-white{background:#fff}
.section h2{font-size:32px;line-height:1.35;color:var(--dark);text-align:center;font-weight:800}
.sec-sub{margin-top:10px;text-align:center;font-size:15px;color:var(--text-sub)}

/* 作品预览 */
.works-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:44px}
.work-card{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:10px;transition:transform .25s,box-shadow .25s}
.work-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover)}
.work-card img{width:100%;height:auto;border-radius:10px}

/* 产品介绍 */
.about-text{max-width:860px;margin:28px auto 0;font-size:16px;color:var(--text-sub)}
.about-text p{margin-bottom:16px}
.about-text p:last-child{margin-bottom:0}
.about-chips{display:flex;justify-content:center;gap:14px;margin-top:28px;flex-wrap:wrap}
.chip{padding:9px 22px;border-radius:999px;background:var(--primary-soft);color:var(--dark);font-size:14px;font-weight:600}

/* 核心功能 */
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:44px}
.feature-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:28px 26px;transition:transform .25s,box-shadow .25s}
.feature-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover)}
.f-icon{display:flex;align-items:center;justify-content:center;width:52px;height:52px;border-radius:14px;background:var(--primary-soft);color:var(--primary);margin-bottom:16px}
.f-icon svg{width:26px;height:26px}
.feature-card h3{font-size:18px;color:var(--dark);margin-bottom:8px}
.feature-card p{font-size:14px;color:var(--text-sub)}

/* 优势对比 */
.table-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:var(--radius);background:var(--card);margin-top:40px;-webkit-overflow-scrolling:touch}
.cmp-table{width:100%;border-collapse:collapse;table-layout:fixed}
.cmp-table th,.cmp-table td{padding:16px 18px;font-size:15px;text-align:left;vertical-align:middle}
.cmp-table thead th{background:var(--dark);color:#fff;font-weight:600}
.cmp-table tbody th{background:var(--primary-soft);color:var(--dark);font-weight:600}
.cmp-table tbody td{border-top:1px solid var(--border);color:var(--text)}
.cmp-table tbody td:nth-child(2){background:#FFF7F0}
.cmp-table tbody td:nth-child(3){background:#F6F5F3}
.table-tip{display:none}

/* 平台数据 */
.stats{background:var(--dark);padding:84px 0}
.stats h2{font-size:32px;line-height:1.35;color:#fff;text-align:center;font-weight:800}
.stats-sub{color:rgba(255,255,255,.68)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:48px;text-align:center}
.stat-num{font-size:42px;line-height:1.2;font-weight:800;color:var(--primary)}
.stat-label{margin-top:8px;font-size:14px;color:rgba(255,255,255,.78)}

/* 用户评价 */
.reviews-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:44px}
.review-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:26px;transition:transform .25s,box-shadow .25s}
.review-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover)}
.review-head{display:flex;align-items:center;gap:14px;margin-bottom:14px}
.avatar{display:flex;align-items:center;justify-content:center;width:46px;height:46px;border-radius:50%;color:#fff;font-size:18px;font-weight:600;flex:0 0 auto}
.av1{background:#FF7E3D}.av2{background:#F0954E}.av3{background:#E8634A}
.av4{background:#FF9359}.av5{background:#E8795C}.av6{background:#F6A35B}
.rname{font-size:15px;font-weight:600;color:var(--dark)}
.stars{font-size:13px;color:#FFAA2B;letter-spacing:2px;margin-top:2px}
.rtext{font-size:14px;color:var(--text-sub)}

/* 版本更新 */
.update-card{max-width:720px;margin:44px auto 0;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:36px 40px;box-shadow:var(--shadow)}
.up-head{display:flex;align-items:baseline;gap:14px;margin-bottom:18px;flex-wrap:wrap}
.up-head h3{font-size:26px;color:var(--primary)}
.up-date{font-size:14px;color:var(--text-sub)}
.up-list{list-style:none}
.up-list li{position:relative;padding:11px 0 11px 26px;font-size:15px;color:var(--text);border-bottom:1px dashed var(--border)}
.up-list li:last-child{border-bottom:none}
.up-list li::before{content:"";position:absolute;left:2px;top:20px;width:8px;height:8px;border-radius:50%;background:var(--primary)}

/* FAQ */
.faq-list{max-width:760px;margin:44px auto 0;display:flex;flex-direction:column;gap:14px}
.faq-item{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:box-shadow .25s}
.faq-item.open{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-size:16px;font-weight:600;color:var(--dark);text-align:left}
.faq-icon{flex:0 0 auto;position:relative;width:22px;height:22px}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);background:var(--primary);transition:transform .3s}
.faq-icon::before{width:12px;height:2px}
.faq-icon::after{width:2px;height:12px}
.faq-item.open .faq-icon::after{transform:translate(-50%,-50%) rotate(90deg)}
.faq-a{display:grid;grid-template-rows:0fr;transition:grid-template-rows .3s ease}
.faq-item.open .faq-a{grid-template-rows:1fr}
.faq-a-inner{overflow:hidden}
.faq-a-inner p{padding:0 22px 20px;font-size:15px;color:var(--text-sub)}

/* 下载区域 */
.download-sec{background:linear-gradient(180deg,var(--bg),var(--primary-soft))}
.dl-title{font-size:38px;line-height:1.3;text-align:center;color:var(--dark);font-weight:800}
.dl-title span{color:var(--primary)}
.dl-meta{margin-top:14px;text-align:center;font-size:14px;color:var(--text-sub)}
.dl-btns{display:flex;justify-content:center;gap:18px;margin-top:32px;flex-wrap:wrap}
.dl-tip{margin-top:24px;text-align:center;font-size:14px;color:var(--text-sub)}

/* 底部页脚 */
.footer{background:var(--dark);padding:30px 0;text-align:center;font-size:14px;color:rgba(255,255,255,.72)}
.footer a{color:#fff;font-weight:600;transition:color .2s}
.footer a:hover{color:#FFB27F}

/* 返回顶部 */
.top-btn{position:fixed;right:24px;bottom:32px;z-index:99;display:flex;align-items:center;justify-content:center;width:46px;height:46px;border:none;border-radius:50%;background:var(--primary);color:#fff;cursor:pointer;box-shadow:var(--shadow);opacity:0;visibility:hidden;transform:translateY(12px);transition:opacity .3s,visibility .3s,transform .3s,background .2s}
.top-btn.show{opacity:1;visibility:visible;transform:none}
.top-btn:hover{background:var(--primary-dark)}
.top-btn svg{width:20px;height:20px}

/* 响应式 */
@media (max-width:1024px){
  .nav-links{display:none}
}
@media (max-width:992px){
  .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)}
}
@media (max-width:768px){
  .container{padding:0 20px}
  .nav-dl{font-size:13px;padding:11px 16px}
  .logo{padding:10px 0}
  .hero{padding:calc(var(--nav-h) + 40px) 0 56px}
  .hero-inner{flex-direction:column;gap:36px;text-align:center}
  .hero h1{font-size:30px}
  .hero h1 .ver{font-size:16px;margin-left:6px}
  .hero p{margin-left:auto;margin-right:auto;font-size:15px}
  .hero-btns{flex-direction:column;width:100%;margin-top:28px}
  .hero-btns .btn{width:100%}
  .hero-img{width:100%;max-width:340px}
  .section{padding:60px 0}
  .section h2{font-size:26px}
  .stats h2{font-size:26px}
  .works-grid,.features-grid,.reviews-grid{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:22px}
  .stat-num{font-size:32px}
  .cmp-table{min-width:620px;table-layout:auto}
  .cmp-table th,.cmp-table td{padding:14px 16px;white-space:nowrap}
  .table-tip{display:block;margin-top:12px;text-align:center;font-size:13px;color:var(--text-sub)}
  .update-card{padding:26px 22px}
  .up-head{flex-direction:column;align-items:flex-start;gap:4px}
  .dl-title{font-size:28px}
  .dl-meta{font-size:12px;white-space:nowrap}
  .dl-btns{flex-direction:column;width:100%;margin-top:26px}
  .dl-btns .btn{width:100%}
  .top-btn{right:16px;bottom:20px;width:42px;height:42px}
}