/* ===== 基础与变量 ===== */
:root{
  --primary:#FF7A3D;
  --primary-dark:#F05A17;
  --primary-soft:#FFF0E3;
  --dark:#261D14;
  --text:#3A2E20;
  --text-light:#7A6A58;
  --border:#F0E4D6;
  --bg:#FFFDF9;
  --bg-soft:#FFF6EC;
  --card:#FFFFFF;
  --radius:16px;
  --shadow:0 8px 24px rgba(240,90,23,.10);
  --shadow-hover:0 16px 36px rgba(240,90,23,.18);
  --warm-grad:linear-gradient(90deg,var(--primary),#FFB25E);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Segoe UI",sans-serif;background:var(--bg);color:var(--text);line-height:1.7;padding-top:64px;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block;background:var(--bg-soft)}
a{text-decoration:none;color:inherit}
button{font-family:inherit}
.container{max-width:1180px;margin:0 auto;padding:0 24px}
.section{padding:84px 0}
.section.alt{background:var(--bg-soft)}
section[id]{scroll-margin-top:70px}

/* ===== 顶部导航 ===== */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(255,253,249,.92);backdrop-filter:blur(10px);border-bottom:1px solid transparent;transition:border-color .3s,box-shadow .3s}
.nav.scrolled{border-bottom-color:var(--border);box-shadow:0 4px 14px rgba(38,29,20,.06)}
.nav-inner{max-width:1180px;margin:0 auto;padding:0 24px;height:64px;display:flex;align-items:center;gap:14px}
.logo{font-size:22px;font-weight:800;color:var(--primary);white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:2px;margin-left:8px}
.nav-links a{padding:6px 10px;font-size:14px;color:var(--text);border-radius:8px;white-space:nowrap;transition:color .2s,background .2s}
.nav-links a:hover{color:var(--primary)}
.nav-links a.active{color:var(--primary);background:var(--primary-soft)}
.nav-download{margin-left:auto;padding:7px 16px;border-radius:999px;background:var(--primary);color:#fff;font-size:13px;font-weight:600;white-space:nowrap;transition:background .2s,transform .2s}
.nav-download:hover{background:var(--primary-dark);transform:translateY(-1px)}

/* ===== 通用按钮与标题 ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 30px;border-radius:999px;font-size:15px;font-weight:600;border:2px solid transparent;transition:all .25s ease}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 6px 16px rgba(240,90,23,.25)}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:0 10px 22px rgba(240,90,23,.32)}
.btn-outline{border-color:var(--primary);color:var(--primary)}
.btn-outline:hover{background:var(--primary);color:#fff;transform:translateY(-2px)}
.sec-head{text-align:center;margin-bottom:44px}
.sec-head h2{font-size:32px;font-weight:800;color:var(--dark);line-height:1.3}
.sec-head .bar{display:block;width:48px;height:4px;border-radius:2px;background:var(--warm-grad);margin:14px auto 0}
.sec-head p{margin-top:12px;color:var(--text-light);font-size:15px}
.ver{display:inline-block;margin-left:10px;font-size:15px;font-weight:700;color:var(--primary-dark);background:var(--primary-soft);border:1px solid var(--border);padding:3px 10px;border-radius:999px;vertical-align:middle}

/* ===== Hero ===== */
.hero{background:linear-gradient(180deg,#FFF3E6 0%,var(--bg) 100%);padding:72px 0 88px}
.hero-inner{display:flex;align-items:center;gap:56px}
.hero-text{flex:1}
.hero-text h1{font-size:42px;line-height:1.25;font-weight:800;color:var(--dark)}
.hero-text p{margin-top:18px;color:var(--text-light);font-size:16px;max-width:560px}
.hero-btns{margin-top:30px;display:flex;gap:14px;flex-wrap:wrap}
.hero-img{flex:0 0 300px}
.hero-img img{width:100%;height:auto;border-radius:20px;box-shadow:0 20px 40px rgba(38,29,20,.14);border:1px solid var(--border)}

/* ===== 卡片通用 ===== */
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);transition:transform .3s ease,box-shadow .3s ease}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}

/* ===== 作品预览 ===== */
.works-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.works-grid figure{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:transform .3s ease,box-shadow .3s ease}
.works-grid figure:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.works-grid img{width:100%;height:auto}

/* ===== 产品介绍 ===== */
.intro-lead{max-width:820px;margin:0 auto 40px;text-align:center;color:var(--text-light);font-size:15px}
.intro-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.intro-grid .card{padding:28px}
.intro-grid h3{font-size:18px;color:var(--dark);margin-bottom:10px}
.intro-grid p{font-size:14px;color:var(--text-light)}

/* ===== 核心功能 ===== */
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.feat{padding:30px 26px}
.feat-icon{width:48px;height:48px;border-radius:14px;background:var(--primary-soft);color:var(--primary);display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.feat-icon svg{width:24px;height:24px}
.feat h3{font-size:17px;color:var(--dark);margin-bottom:8px}
.feat p{font-size:14px;color:var(--text-light)}

/* ===== 优势对比 ===== */
.table-wrap{overflow:hidden;border:1px solid var(--border);border-radius:var(--radius);background:var(--card);box-shadow:var(--shadow)}
.compare-table{width:100%;border-collapse:collapse}
.compare-table th,.compare-table td{padding:16px 18px;text-align:center;font-size:14px;border-bottom:1px solid var(--border)}
.compare-table thead th{background:var(--bg-soft);font-weight:700;color:var(--dark)}
.compare-table tbody tr:last-child td{border-bottom:none}
.compare-table td:first-child{text-align:left;color:var(--text-light);white-space:nowrap}
.compare-table .ours{background:var(--primary-soft);font-weight:700;color:var(--primary-dark)}

/* ===== 平台数据 ===== */
.data{background:linear-gradient(135deg,#FF8A4A 0%,var(--primary-dark) 55%,#C9440E 100%)}
.data .sec-head h2{color:#fff}
.data .sec-head p{color:rgba(255,255,255,.82)}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:30px;text-align:center}
.stat-num{font-size:40px;font-weight:800;color:#fff;line-height:1.2}
.stat-label{margin-top:6px;font-size:14px;color:rgba(255,255,255,.85)}

/* ===== 用户评价 ===== */
.reviews-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.review{padding:24px}
.review-head{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.avatar{width:44px;height:44px;border-radius:50%;background:var(--warm-grad);color:#fff;font-size:18px;font-weight:700;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.review-name{font-weight:700;color:var(--dark);font-size:15px}
.stars{color:#FFB400;font-size:14px;letter-spacing:1px;margin-top:2px}
.review p{font-size:14px;color:var(--text-light)}

/* ===== 版本更新 ===== */
.update-card{max-width:760px;margin:0 auto;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:36px;box-shadow:var(--shadow)}
.update-top{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-bottom:20px}
.ver-badge{background:var(--primary);color:#fff;font-weight:800;font-size:18px;padding:6px 16px;border-radius:999px}
.update-date{color:var(--text-light);font-size:14px}
.update-card ul{list-style:none}
.update-card li{position:relative;padding:10px 0 10px 30px;border-bottom:1px dashed var(--border);font-size:15px}
.update-card li:last-child{border-bottom:none}
.update-card li::before{content:"✓";position:absolute;left:6px;color:var(--primary);font-weight:700}

/* ===== FAQ ===== */
.faq{max-width:760px;margin:0 auto}
.faq-item{background:var(--card);border:1px solid var(--border);border-radius:12px;margin-bottom:12px;overflow:hidden;transition:box-shadow .3s}
.faq-item.open{box-shadow:var(--shadow)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:18px 20px;background:none;border:none;cursor:pointer;font-size:15px;font-weight:600;color:var(--dark);text-align:left}
.faq-icon{flex-shrink:0;width:22px;height:22px;position:relative}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--primary);border-radius:2px;transition:transform .3s}
.faq-icon::before{left:4px;right:4px;top:10px;height:2px}
.faq-icon::after{top:4px;bottom:4px;left:10px;width:2px}
.faq-item.open .faq-icon::after{transform:scaleY(0)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-item.open .faq-a{max-height:400px}
.faq-a p{padding:0 20px 18px;color:var(--text-light);font-size:14px}

/* ===== 下载区域 ===== */
.download-box{max-width:720px;margin:0 auto;background:linear-gradient(180deg,var(--bg) 0%,var(--primary-soft) 100%);border:1px solid var(--border);border-radius:24px;padding:48px 40px;text-align:center;box-shadow:var(--shadow)}
.download-box h1{font-size:34px;font-weight:800;color:var(--dark)}
.dl-meta{margin-top:10px;font-size:14px;color:var(--text-light)}
.download-btns{display:flex;gap:16px;justify-content:center;margin-top:28px}
.download-btns .btn{flex:1;max-width:280px;padding:14px 20px}
.dl-tip{margin-top:24px;font-size:14px;color:var(--primary-dark)}

/* ===== 页脚 ===== */
.footer{background:var(--dark);color:rgba(255,255,255,.75);text-align:center;padding:28px 0;font-size:14px}
.footer a{color:var(--primary);font-weight:600}
.footer a:hover{color:#FFB25E}

/* ===== 返回顶部 ===== */
.to-top{position:fixed;right:24px;bottom:28px;width:44px;height:44px;border-radius:50%;background:var(--primary);color:#fff;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:0 8px 18px rgba(240,90,23,.35);opacity:0;visibility:hidden;transform:translateY(12px);transition:all .3s ease;z-index:99}
.to-top.show{opacity:1;visibility:visible;transform:none}
.to-top:hover{background:var(--primary-dark)}
.to-top svg{width:20px;height:20px}

/* ===== 滚动显现 ===== */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .55s ease,transform .55s ease}
.reveal.in{opacity:1;transform:none}

/* ===== 响应式 ===== */
@media (max-width:1100px){
  .nav-links a{padding:5px 7px;font-size:13px}
}
@media (max-width:992px){
  .nav-links{display:none}
  .hero-img{flex-basis:240px}
  .hero-text h1{font-size:34px}
  .works-grid{grid-template-columns:repeat(2,1fr)}
  .intro-grid,.features-grid,.reviews-grid{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:repeat(2,1fr);gap:26px}
}
@media (max-width:768px){
  body{padding-top:56px}
  .nav-inner{height:56px;padding:0 20px}
  .logo{font-size:19px;display:flex;align-items:center;min-height:44px}
  .nav-download{padding:9px 18px}
  .container{padding:0 20px}
  .section{padding:56px 0}
  .sec-head{margin-bottom:32px}
  .sec-head h2{font-size:26px}
  .hero{padding:44px 0 56px}
  .hero-inner{flex-direction:column;gap:36px;align-items:stretch}
  .hero-text h1{font-size:30px}
  .hero-text p{font-size:15px}
  .hero-btns{flex-direction:column;width:100%}
  .hero-btns .btn{width:100%}
  .hero-img{flex:none;width:100%}
  .works-grid{grid-template-columns:1fr;gap:20px}
  .intro-grid,.features-grid,.reviews-grid{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(2,1fr);gap:22px}
  .stat-num{font-size:32px}
  .compare-table th,.compare-table td{padding:11px 8px;font-size:14px}
  .update-card{padding:26px 20px}
  .update-card li{font-size:14px}
  .download-box{padding:36px 20px}
  .download-box h1{font-size:26px}
  .dl-meta{font-size:12px;white-space:nowrap}
  .download-btns{flex-direction:column;align-items:stretch}
  .download-btns .btn{max-width:none;width:100%}
  .to-top{right:16px;bottom:20px;width:40px;height:40px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
}