:root{
  --primary:#FF5A1F;
  --primary-deep:#E84A10;
  --primary-soft:#FFF3EC;
  --dark:#1D2129;
  --text:#23262D;
  --muted:#5A6472;
  --border:#E7EAF0;
  --bg:#F6F8FB;
  --card:#FFFFFF;
  --success:#1FA855;
  --star:#FFB020;
  --radius:14px;
  --radius-lg:18px;
  --shadow:0 6px 20px rgba(29,33,41,.06);
  --shadow-hover:0 16px 34px rgba(29,33,41,.13);
  --container:1200px;
  --header-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);line-height:1.65;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
ul{list-style:none}
button{font-family:inherit;cursor:pointer}
section[id]{scroll-margin-top:76px}
.container{max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:84px 0}
.section-white{background:var(--card)}
.section-dark{background:var(--dark)}

.sec-head{text-align:center;margin-bottom:44px}
.sec-title{font-size:32px;font-weight:800;line-height:1.3}
.sec-title.left{text-align:left}
.sec-sub{color:var(--muted);font-size:15px;margin-top:10px}
.sec-head.dark .sec-title{color:#fff}
.sec-head.dark .sec-sub{color:rgba(255,255,255,.65)}

/* ===== 导航栏 ===== */
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.94);backdrop-filter:blur(10px);border-bottom:1px solid var(--border);transition:box-shadow .25s}
.site-header.scrolled{box-shadow:0 6px 18px rgba(29,33,41,.07)}
.header-inner{max-width:var(--container);margin:0 auto;padding:0 24px;height:var(--header-h);display:flex;align-items:center;gap:20px}
.logo{font-size:19px;font-weight:800;color:var(--primary);white-space:nowrap;letter-spacing:.5px}
.logo:hover{color:var(--primary-deep)}
.nav-menu{display:flex;gap:20px;margin:0 auto}
.nav-menu a{font-size:14px;color:var(--muted);font-weight:500;white-space:nowrap;transition:color .2s}
.nav-menu a:hover,.nav-menu a.active{color:var(--primary)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:none;border-radius:999px;font-weight:600;white-space:nowrap;transition:transform .2s,box-shadow .2s,background .2s,color .2s}
.btn-download{background:var(--primary);color:#fff;font-size:13px;padding:5px 14px}
.btn-download:hover{background:var(--primary-deep);transform:translateY(-1px);box-shadow:0 8px 18px rgba(255,90,31,.35)}
.btn-primary{background:var(--primary);color:#fff;padding:13px 30px;font-size:15px}
.btn-primary:hover{background:var(--primary-deep);transform:translateY(-2px);box-shadow:0 12px 26px rgba(255,90,31,.38)}
.btn-ghost{background:var(--card);color:var(--dark);border:1px solid var(--border);padding:13px 30px;font-size:15px}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-2px);box-shadow:var(--shadow)}
.btn-dark{background:var(--dark);color:#fff;padding:13px 30px;font-size:15px}
.btn-dark:hover{background:#2E333B;transform:translateY(-2px);box-shadow:0 12px 26px rgba(29,33,41,.28)}
.btn-lg{padding:15px 36px;font-size:16px}

/* ===== Hero ===== */
.hero{padding:80px 0 88px;background:linear-gradient(180deg,var(--primary-soft) 0%,var(--bg) 100%)}
.hero-inner{display:flex;align-items:center;gap:56px}
.hero-copy{flex:1;min-width:0}
.hero h1{font-size:44px;line-height:1.28;font-weight:800;letter-spacing:1px}
.ver{display:inline-block;margin-left:8px;background:var(--primary-soft);color:var(--primary);font-size:18px;font-weight:800;padding:4px 14px;border-radius:999px;vertical-align:middle}
.hero-desc{font-size:16px;color:var(--muted);margin:18px 0 32px;max-width:540px}
.hero-btns{display:flex;gap:16px}
.hero-media{flex:0 0 300px}
.hero-media img{width:100%;height:auto;border-radius:var(--radius-lg);box-shadow:0 18px 40px rgba(255,90,31,.22)}

/* ===== 作品预览 ===== */
.works-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.work-card{background:var(--card);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s}
.work-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.work-card img{width:100%;height:auto}
.work-card figcaption{padding:12px 16px;font-size:14px;font-weight:600;color:var(--dark);text-align:center}

/* ===== 产品介绍 ===== */
.intro-inner{display:flex;gap:56px;align-items:flex-start}
.intro-text{flex:1;min-width:0}
.intro-text p{color:var(--muted);font-size:15px;margin-top:16px}
.intro-cards{flex:0 0 440px;display:grid;grid-template-columns:1fr 1fr;gap:16px}
.mini-card{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);padding:20px;transition:transform .25s,box-shadow .25s,background .25s}
.mini-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);background:var(--card)}
.mini-card h3{font-size:15px;font-weight:700;color:var(--primary)}
.mini-card p{font-size:14px;color:var(--muted);margin-top:8px;line-height:1.55}

/* ===== 核心功能 ===== */
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feat-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:30px 26px;transition:transform .25s,box-shadow .25s}
.feat-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.feat-icon{width:52px;height:52px;border-radius:14px;background:var(--primary-soft);color:var(--primary);display:flex;align-items:center;justify-content:center;margin-bottom:18px}
.feat-icon svg{width:26px;height:26px}
.feat-card h3{font-size:18px;font-weight:700}
.feat-card p{font-size:14px;color:var(--muted);margin-top:10px}

/* ===== 优势对比 ===== */
.cmp-table{max-width:960px;margin:0 auto;border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;background:var(--card)}
.cmp-row{display:grid;grid-template-columns:1.1fr 1.3fr 1.1fr 1.1fr}
.cmp-cell{padding:16px 18px;font-size:14px;color:var(--muted);border-top:1px solid var(--border);display:flex;align-items:center;justify-content:center;text-align:center;line-height:1.5}
.cmp-row:first-child .cmp-cell{border-top:none}
.cmp-head .cmp-cell{background:var(--bg);color:var(--dark);font-weight:700;font-size:15px}
.cmp-key{justify-content:flex-start;font-weight:600;color:var(--text)}
.cmp-high{background:var(--primary-soft)}
.cmp-head .cmp-high{background:var(--primary);color:#fff}
.tag{display:inline-flex;align-items:center;gap:6px;font-weight:700;color:var(--success)}
.tag svg{width:15px;height:15px}

/* ===== 平台数据 ===== */
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.stat-card{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);border-radius:var(--radius-lg);padding:38px 20px;text-align:center;transition:transform .25s,background .25s}
.stat-card:hover{transform:translateY(-6px);background:rgba(255,255,255,.1)}
.stat-num{font-size:46px;font-weight:800;color:#fff;line-height:1.1}
.stat-num span{color:var(--primary);font-size:26px;margin-left:2px}
.stat-label{color:rgba(255,255,255,.68);font-size:14px;margin-top:12px}

/* ===== 用户评价 ===== */
.rev-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.rev-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:26px;transition:transform .25s,box-shadow .25s}
.rev-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.rev-top{display:flex;align-items:center;gap:14px;margin-bottom:16px}
.rev-avatar{width:44px;height:44px;border-radius:50%;background:var(--primary-soft);color:var(--primary);font-size:18px;font-weight:800;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.rev-name{font-size:15px;font-weight:700;color:var(--dark)}
.rev-stars{color:var(--star);font-size:14px;letter-spacing:2px;margin-top:2px}
.rev-text{font-size:14px;color:var(--muted);line-height:1.7}

/* ===== 版本更新 ===== */
.update-card{max-width:820px;margin:0 auto;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);padding:34px 38px}
.update-head{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-bottom:20px;border-bottom:1px dashed var(--border)}
.update-ver{background:var(--primary);color:#fff;font-size:18px;font-weight:800;padding:6px 18px;border-radius:999px}
.update-time{font-size:14px;color:var(--muted)}
.update-list{margin-top:22px}
.update-list li{position:relative;padding:11px 0 11px 30px;font-size:15px;color:var(--text)}
.update-list li::before{content:"";position:absolute;left:6px;top:19px;width:8px;height:8px;border-radius:50%;background:var(--primary)}

/* ===== FAQ ===== */
.faq-wrap{max-width:820px}
.faq-list{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{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;background:none;border:none;padding:18px 22px;font-size:15px;font-weight:600;color:var(--dark);text-align:left}
.faq-icon{position:relative;width:18px;height:18px;flex-shrink:0}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--primary);border-radius:2px;transition:transform .25s}
.faq-icon::before{width:18px;height:2px;top:8px;left:0}
.faq-icon::after{width:2px;height:18px;top:0;left:8px}
.faq-item.open .faq-icon::after{transform:scaleY(0)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-item.open .faq-a{max-height:300px}
.faq-a p{padding:0 22px 20px;font-size:14px;color:var(--muted);line-height:1.75}

/* ===== 下载区域 ===== */
.download-wrap{text-align:center;padding:20px 0}
.dl-title{font-size:38px;font-weight:800;line-height:1.3}
.dl-info{font-size:14px;color:var(--muted);margin:16px 0 30px}
.dl-btns{display:flex;justify-content:center;gap:18px;flex-wrap:wrap}
.dl-tip{margin-top:26px;font-size:15px;color:var(--primary);font-weight:600}

/* ===== 页脚 ===== */
.site-footer{background:var(--dark);padding:34px 0}
.footer-inner{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;text-align:center}
.footer-copy{font-size:14px;color:rgba(255,255,255,.75)}
.footer-copy a{color:#fff;font-weight:700}
.footer-copy a:hover{color:var(--primary)}
.footer-slogan{font-size:13px;color:rgba(255,255,255,.5)}

/* ===== 返回顶部 ===== */
#backTop{position:fixed;right:26px;bottom:30px;width:46px;height:46px;border-radius:50%;border:none;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;box-shadow:0 10px 24px rgba(255,90,31,.4);opacity:0;visibility:hidden;transform:translateY(10px);transition:opacity .25s,transform .25s,visibility .25s,background .25s;z-index:99}
#backTop.show{opacity:1;visibility:visible;transform:translateY(0)}
#backTop:hover{background:var(--primary-deep)}
#backTop svg{width:20px;height:20px}

/* ===== 平板 ===== */
@media (max-width:992px){
  .section{padding:64px 0}
  .hero{padding:60px 0 64px}
  .hero h1{font-size:36px}
  .hero-media{flex-basis:250px}
  .works-grid{grid-template-columns:repeat(2,1fr)}
  .feat-grid{grid-template-columns:repeat(2,1fr)}
  .stat-grid{grid-template-columns:repeat(2,1fr)}
  .rev-grid{grid-template-columns:repeat(2,1fr)}
  .intro-inner{flex-direction:column;gap:32px}
  .intro-cards{flex:none;width:100%;grid-template-columns:repeat(2,1fr)}
  .cmp-row{grid-template-columns:1fr 1.2fr 1fr 1fr}
  .cmp-cell{padding:13px 10px;font-size:13px}
  .nav-menu{gap:14px}
  .nav-menu a{font-size:13px}
}

/* ===== 手机 ===== */
@media (max-width:768px){
  .container{padding:0 20px}
  .header-inner{padding:0 20px;gap:12px;justify-content:space-between}
  .logo{font-size:17px}
  .nav-menu{display:none}
  .btn-download{font-size:12px;padding:4px 12px}
  .section{padding:54px 0}
  .sec-head{margin-bottom:32px}
  .sec-title{font-size:26px}
  .sec-sub{font-size:14px}
  .hero{padding:44px 0 52px}
  .hero-inner{flex-direction:column;gap:32px}
  .hero h1{font-size:30px}
  .hero-desc{font-size:15px;margin:16px 0 26px}
  .hero-btns{flex-direction:column;width:100%}
  .hero-btns .btn{width:100%}
  .hero-media{flex:none;width:100%;max-width:340px}
  .works-grid{grid-template-columns:1fr}
  .intro-cards{grid-template-columns:1fr}
  .feat-grid{grid-template-columns:1fr}
  .cmp-row{grid-template-columns:1fr 1.25fr 1fr 1fr}
  .cmp-cell{padding:11px 6px;font-size:12px}
  .cmp-key{justify-content:center}
  .tag{gap:4px}
  .tag svg{width:13px;height:13px}
  .rev-grid{grid-template-columns:1fr}
  .stat-grid{gap:16px}
  .stat-num{font-size:36px}
  .update-card{padding:24px 20px}
  .update-head{flex-direction:column;align-items:flex-start;gap:10px}
  .dl-title{font-size:28px}
  .dl-info{font-size:12px;white-space:nowrap;margin:14px 0 24px}
  .dl-btns{flex-direction:column;align-items:stretch}
  .dl-btns .btn{width:100%}
  #backTop{right:16px;bottom:20px;width:42px;height:42px}
}