:root{
  --primary:#FFCC00;
  --dark:#3A2F1A;
  --text:#5F5542;
  --border:#E8DCBE;
  --bg:#FDF8E9;
  --card:#FFFFFF;
  --radius:16px;
  --shadow:0 6px 18px rgba(255,204,0,.22);
  --shadow-hover:0 14px 30px rgba(255,204,0,.3);
}
*{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(--dark);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased}
a{text-decoration:none;color:inherit}
ul{list-style:none}
img{display:block}
section{scroll-margin-top:72px}
::selection{background:var(--primary);color:var(--dark)}
.wrap{max-width:1200px;margin:0 auto;padding:0 24px}

/* 顶部导航 */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);border-bottom:1px solid transparent;transition:box-shadow .3s,border-color .3s}
.nav.scrolled{box-shadow:0 4px 16px rgba(46,42,51,.08);border-color:var(--border)}
.nav-inner{max-width:1200px;margin:0 auto;height:64px;display:flex;align-items:center;justify-content:space-between;padding:0 24px}
.logo{font-size:22px;font-weight:800;letter-spacing:1px;color:var(--dark);display:inline-flex;align-items:center;min-height:44px}
.logo span{color:#E89600}
.nav-menu{display:flex;align-items:center;gap:18px}
.nav-menu a{font-size:14px;color:var(--text);transition:color .2s}
.nav-menu a:hover{color:#E89600}
.nav-btn{font-size:14px;color:var(--dark);background:var(--primary);padding:8px 18px;border-radius:999px;font-weight:600;display:inline-flex;align-items:center;min-height:44px;box-shadow:0 4px 12px rgba(255,204,0,.45);transition:transform .2s,box-shadow .2s}
.nav-btn:hover{transform:translateY(-2px);box-shadow:0 6px 16px rgba(255,204,0,.55)}

/* 首屏 Hero */
.hero{padding:150px 0 96px;background:#FBF2D9}
.hero-inner{max-width:1200px;margin:0 auto;padding:0 24px;display:flex;align-items:center;gap:64px}
.hero-text{flex:1}
.hero-text h1{font-size:44px;line-height:1.3;font-weight:800}
.ver-tag{display:inline-block;font-size:18px;color:var(--dark);background:var(--primary);padding:3px 14px;border-radius:999px;vertical-align:middle;margin-left:10px;font-weight:700}
.hero-text p{color:var(--text);margin:20px 0 32px;font-size:17px;max-width:560px}
.hero-btns{display:flex;gap:16px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;font-size:16px;font-weight:700;color:var(--dark);background:var(--primary);padding:14px 30px;border-radius:999px;box-shadow:0 6px 18px rgba(255,204,0,.4);transition:transform .2s,box-shadow .2s}
.btn:hover{transform:translateY(-3px);box-shadow:0 10px 24px rgba(255,204,0,.5)}
.btn-ghost{background:#fff;color:var(--dark);border:2px solid var(--primary)}
.hero-img{flex:0 0 400px}
.hero-img img{width:100%;height:auto;border-radius:24px;box-shadow:0 20px 44px rgba(255,204,0,.35)}

/* 通用区块 */
.sec{padding:88px 0}
.sec-white{background:#FFF}
.sec-head{text-align:center;margin-bottom:46px}
.sec-head h2{font-size:30px;font-weight:800}
.sec-head h2::after{content:"";display:block;width:52px;height:4px;border-radius:2px;background:var(--primary);margin:12px auto 0}
.sec-head p{color:var(--text);margin-top:10px;font-size:15px}

/* 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);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}

/* 产品介绍 */
.intro-card{background:var(--card);border-radius:20px;padding:44px 48px;box-shadow:var(--shadow);max-width:960px;margin:0 auto}
.intro-card p{color:var(--text);font-size:16px;margin-bottom:16px}
.intro-card p:last-of-type{margin-bottom:24px}
.intro-points{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.intro-point{background:#FBF2D9;border-radius:12px;padding:16px;text-align:center}
.intro-point b{display:block;color:var(--dark);font-size:15px;margin-bottom:4px}
.intro-point span{color:var(--text);font-size:13px}

/* 核心功能 */
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feat-card{background:var(--card);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s}
.feat-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.feat-badge{width:48px;height:48px;border-radius:14px;background:var(--primary);color:var(--dark);font-size:20px;font-weight:800;display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.feat-card h3{font-size:18px;margin-bottom:8px}
.feat-card p{color:var(--text);font-size:14px}

/* 优势对比 */
.compare-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;border-radius:var(--radius)}
.compare-table{width:100%;min-width:660px;border-collapse:collapse;background:#fff}
.compare-table th,.compare-table td{padding:16px 22px;text-align:left;border:1px solid var(--border);white-space:nowrap;font-size:15px}
.compare-table thead th{background:#FBF2D9;color:var(--dark);font-weight:700}
.compare-table td.dim{background:#FBF8F9;color:var(--dark);font-weight:600}
.compare-table td.us{background:#FDF4DC;color:#C08000;font-weight:600}
.compare-table td.other{background:#F6F6F8;color:#9A95A0}
.compare-tip{display:none;margin-top:14px;text-align:center;color:#9A95A0;font-size:13px}

/* 平台数据 */
.data-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.data-card{background:var(--card);border-radius:var(--radius);padding:32px 20px;text-align:center;box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s}
.data-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.data-num{font-size:42px;font-weight:800;color:#F0A500}
.data-label{color:var(--text);font-size:15px;margin-top:6px}

/* 用户评价 */
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.review-card{background:var(--card);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s}
.review-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.review-top{display:flex;align-items:center;gap:12px}
.review-avatar{width:48px;height:48px;border-radius:50%;background:var(--primary);color:var(--dark);font-size:18px;font-weight:700;display:flex;align-items:center;justify-content:center;flex:0 0 48px}
.review-name{font-weight:700;font-size:15px;color:var(--dark)}
.review-stars{color:#FFB43A;font-size:14px;letter-spacing:2px}
.review-text{color:var(--text);font-size:14px;margin-top:14px}

/* 版本更新 */
.update-card{background:var(--card);border-radius:var(--radius);padding:40px;box-shadow:var(--shadow);max-width:880px;margin:0 auto}
.update-head{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-bottom:24px}
.update-ver{font-size:20px;font-weight:800;color:var(--dark);background:var(--primary);padding:6px 16px;border-radius:999px}
.update-date{color:var(--text);font-size:15px}
.update-list li{display:flex;gap:10px;color:var(--text);font-size:15px;padding:11px 0;border-bottom:1px dashed var(--border)}
.update-list li:last-child{border-bottom:none}
.update-list li::before{content:"✓";color:var(--primary);font-weight:700;flex:0 0 auto}

/* FAQ */
.faq-list{max-width:880px;margin:0 auto}
.faq-item{background:var(--card);border:1px solid var(--border);border-radius:14px;margin-bottom:14px;overflow:hidden;transition:box-shadow .25s}
.faq-item.open{box-shadow:var(--shadow)}
.faq-question{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 22px;background:none;border:none;cursor:pointer;font-size:16px;font-weight:600;color:var(--dark);text-align:left;font-family:inherit}
.faq-icon{position:relative;flex:0 0 22px;height:22px}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;left:50%;top:50%;width:14px;height:2px;background:var(--primary);border-radius:2px;transform:translate(-50%,-50%);transition:transform .3s}
.faq-icon::after{transform:translate(-50%,-50%) rotate(90deg)}
.faq-item.open .faq-icon::after{transform:translate(-50%,-50%) rotate(0)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-answer p{padding:0 22px 20px;color:var(--text);font-size:15px}
.faq-item.open .faq-answer{max-height:400px}

/* 下载区域 */
.download{background:#FBF2D9}
.download-card{background:#33290F;border-radius:24px;text-align:center;padding:56px 40px;color:#fff}
.download-card h1{font-size:34px;font-weight:800;line-height:1.3}
.download-info{margin-top:14px;font-size:15px;color:#E9E3D3}
.download-btns{display:flex;justify-content:center;gap:18px;margin-top:34px;flex-wrap:wrap}
.download-btns .btn{min-width:230px}
.download-btn-light{background:#fff;color:var(--dark);box-shadow:0 6px 18px rgba(0,0,0,.25)}
.download-btn-light:hover{box-shadow:0 10px 24px rgba(0,0,0,.3)}
.download-tip{margin-top:22px;font-size:15px;color:#F5D98A}

/* 页脚 */
.footer{background:#33290F;color:#C9C2B4;padding:36px 0;text-align:center;font-size:14px}
.footer a{color:#fff}
.footer a:hover{color:var(--primary)}

/* 返回顶部 */
.back-top{position:fixed;right:28px;bottom:32px;z-index:99;width:46px;height:46px;border-radius:50%;border:none;cursor:pointer;background:var(--primary);color:var(--dark);font-size:20px;font-family:inherit;box-shadow:0 6px 18px rgba(255,204,0,.5);opacity:0;visibility:hidden;transform:translateY(12px);transition:opacity .3s,transform .3s,visibility .3s}
.back-top.show{opacity:1;visibility:visible;transform:translateY(0)}

/* 响应式 */
@media (max-width:1024px){
  .nav-menu{gap:14px}
  .nav-menu a{font-size:13px}
  .works-grid{grid-template-columns:repeat(2,1fr)}
  .feat-grid{grid-template-columns:repeat(2,1fr)}
  .review-grid{grid-template-columns:repeat(2,1fr)}
  .data-grid{grid-template-columns:repeat(2,1fr)}
  .hero-img{flex:0 0 320px}
  .hero-text h1{font-size:38px}
  .intro-points{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:900px){
  .nav-menu{display:none}
}
@media (max-width:768px){
  .wrap,.hero-inner,.nav-inner{padding:0 20px}
  .hero{padding:118px 0 64px}
  .hero-inner{flex-direction:column;gap:36px}
  .hero-text h1{font-size:30px}
  .hero-text h1 .ver-tag{font-size:15px;margin-left:8px}
  .hero-text p{font-size:15px;margin:16px 0 28px}
  .hero-btns{flex-direction:column;width:100%}
  .hero-btns .btn{width:100%;padding:13px 0}
  .hero-img{flex:0 0 auto;width:100%;max-width:420px}
  .sec{padding:64px 0}
  .sec-head{margin-bottom:34px}
  .sec-head h2{font-size:24px}
  .works-grid{grid-template-columns:1fr;gap:20px}
  .feat-grid{grid-template-columns:1fr;gap:16px}
  .review-grid{grid-template-columns:1fr;gap:16px}
  .data-grid{grid-template-columns:repeat(2,1fr);gap:14px}
  .data-num{font-size:32px}
  .intro-card{padding:30px 24px}
  .intro-points{grid-template-columns:1fr}
  .compare-tip{display:block}
  .update-card{padding:28px 22px}
  .download-card{padding:46px 20px;border-radius:18px}
  .download-card h1{font-size:26px}
  .download-info{font-size:12px;white-space:nowrap}
  .download-btns{flex-direction:column;align-items:stretch;margin-top:28px}
  .download-btns .btn{width:100%;min-width:0}
  .back-top{right:16px;bottom:20px;width:42px;height:42px}
}