:root{
  --primary:#FF7A18;
  --primary-deep:#E96A0C;
  --primary-soft:#FFF1E6;
  --dark:#1C1C22;
  --border:#E7E7EC;
  --bg:#FFFFFF;
  --bg-soft:#F6F7F9;
  --text:#26262E;
  --text-2:#5D5D68;
  --radius:16px;
  --radius-lg:20px;
  --shadow-hover:0 16px 34px rgba(28,28,34,.12);
  --nav-h:68px;
  --container:1200px;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
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:1.7;
}
a{color:inherit;text-decoration:none}
ul{list-style:none}
img{display:block;max-width:100%}
button{font-family:inherit;cursor:pointer;border:none;background:none}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px}

.container{max-width:var(--container);margin:0 auto;padding:0 24px}
.container-narrow{max-width:860px}
section{scroll-margin-top:calc(var(--nav-h) + 8px)}

.btn{
  display:inline-flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:600;
  padding:12px 26px;border-radius:12px;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-deep);transform:translateY(-2px);box-shadow:0 10px 22px rgba(255,122,24,.32)}
.btn-outline{border:1.5px solid var(--primary);color:var(--primary-deep)}
.btn-outline:hover{background:var(--primary-soft);transform:translateY(-2px);box-shadow:0 10px 22px rgba(255,122,24,.14)}
.btn-lg{font-size:17px;padding:15px 34px}

/* 顶部导航 */
.nav{
  position:sticky;top:0;z-index:100;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--border);
  transition:box-shadow .25s ease;
}
.nav.scrolled{box-shadow:0 6px 20px rgba(28,28,34,.06)}
.nav-inner{display:flex;align-items:center;gap:22px;height:var(--nav-h)}
.logo{display:flex;align-items:center;gap:8px;font-size:20px;font-weight:800;color:var(--dark)}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-links a{
  font-size:14.5px;color:var(--text-2);padding:8px 12px;border-radius:10px;
  transition:color .2s ease,background .2s ease;
}
.nav-links a:hover,.nav-links a.active{color:var(--primary-deep);background:var(--primary-soft)}
.nav-links a.active{font-weight:600}
.btn-nav{font-size:14.5px;padding:9px 18px;margin-left:6px}
.btn-nav:hover{transform:none}

/* Hero */
.hero{padding:76px 0 90px;background:linear-gradient(180deg,#FFF8F1 0%,#fff 68%)}
.hero-inner{display:grid;grid-template-columns:1.15fr .85fr;align-items:center;gap:56px}
.hero-text h1{font-size:clamp(34px,4.6vw,54px);line-height:1.22;font-weight:800;letter-spacing:.5px;color:var(--dark)}
.hero-desc{margin:22px 0 34px;font-size:17px;color:var(--text-2);max-width:560px}
.hero-btns{display:flex;gap:16px;flex-wrap:wrap}
.hero-img{display:flex;justify-content:center}
.hero-img img{
  width:min(340px,88%);height:auto;border-radius:24px;
  box-shadow:0 24px 60px rgba(28,28,34,.16);
  border:6px solid #fff;
}

/* 通用区块 */
.section{padding:84px 0}
.section-alt{background:var(--bg-soft)}
.section-title{font-size:clamp(26px,3.2vw,38px);font-weight:800;color:var(--dark);text-align:center;letter-spacing:.5px}
.section-title-left{text-align:left}
.section-sub{margin:12px auto 44px;font-size:16px;color:var(--text-2);text-align:center}

/* 作品预览 */
.works-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.work-card{
  border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--border);
  transition:transform .25s ease,box-shadow .25s ease;
}
.work-card img{width:100%;height:auto;aspect-ratio:2/3;object-fit:cover}
.work-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}

/* 产品介绍 */
.intro-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.intro-text p{margin-top:16px;font-size:16px;color:var(--text-2)}
.intro-cards{display:grid;gap:18px}
.mini-card{
  background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);
  padding:22px 24px;display:flex;gap:16px;align-items:flex-start;
  transition:transform .25s ease,box-shadow .25s ease;
}
.mini-card svg{color:var(--primary);flex-shrink:0;margin-top:2px}
.mini-card h3{font-size:17px;font-weight:700;color:var(--dark)}
.mini-card p{margin-top:4px;font-size:14.5px;color:var(--text-2)}
.mini-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover)}

/* 核心功能 */
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.feat-card{
  background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);
  padding:30px 28px;text-align:center;
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.feat-icon{
  width:54px;height:54px;margin:0 auto 18px;border-radius:14px;
  background:var(--primary-soft);color:var(--primary);
  display:flex;align-items:center;justify-content:center;
}
.feat-card h3{font-size:18px;font-weight:700;color:var(--dark)}
.feat-card p{margin-top:8px;font-size:14.5px;color:var(--text-2)}
.feat-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover);border-color:rgba(255,122,24,.35)}

/* 优势对比 */
.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;border:1px solid var(--border);border-radius:var(--radius-lg);background:var(--bg)}
.cmp-table{width:100%;border-collapse:collapse;table-layout:fixed}
.cmp-table th,.cmp-table td{padding:16px 18px;text-align:center;font-size:15px;border-bottom:1px solid var(--border)}
.cmp-table thead th{background:var(--dark);color:#fff;font-weight:600;font-size:15.5px}
.cmp-table tbody th{background:var(--bg-soft);color:var(--text);font-weight:600}
.cmp-table td{color:var(--text-2)}
.cmp-table .cmp-best{color:var(--primary-deep);font-weight:700;background:var(--primary-soft)}
.cmp-table thead .cmp-best{background:var(--primary);color:#fff}
.cmp-table tbody tr:last-child td,.cmp-table tbody tr:last-child th{border-bottom:none}
.table-hint{display:none;margin-top:14px;text-align:center;font-size:13px;color:var(--text-2)}

/* 平台数据 */
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.stat-card{
  background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);
  padding:34px 20px;text-align:center;
  transition:transform .25s ease,box-shadow .25s ease;
}
.stat-num{font-size:clamp(34px,3.4vw,46px);font-weight:800;color:var(--primary);line-height:1.15}
.stat-label{margin-top:10px;font-size:15px;color:var(--text-2)}
.stat-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}

/* 用户评价 */
.rev-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.rev-card{
  background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);
  padding:26px 26px 22px;
  transition:transform .25s ease,box-shadow .25s ease;
}
.rev-head{display:flex;align-items:center;gap:14px;margin-bottom:14px}
.avatar{
  width:46px;height:46px;border-radius:50%;flex-shrink:0;
  background:var(--primary);color:#fff;font-size:18px;font-weight:700;
  display:flex;align-items:center;justify-content:center;
}
.rev-meta{display:flex;flex-direction:column;gap:2px}
.rev-name{font-size:16px;font-weight:700;color:var(--dark)}
.stars{color:#FFB300;font-size:15px;letter-spacing:2px}
.rev-card p{font-size:14.5px;color:var(--text-2)}
.rev-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}

/* 版本更新 */
.version-card{
  background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:34px 38px;
  transition:transform .25s ease,box-shadow .25s ease;
}
.version-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.version-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:18px;border-bottom:1px solid var(--border);margin-bottom:20px}
.version-head h3{font-size:26px;font-weight:800;color:var(--dark)}
.version-date{font-size:15px;color:var(--text-2);background:var(--bg-soft);border:1px solid var(--border);border-radius:20px;padding:5px 16px}
.log-list li{
  position:relative;padding:9px 0 9px 26px;font-size:15px;color:var(--text-2);
}
.log-list li::before{
  content:"";position:absolute;left:4px;top:18px;width:8px;height:8px;border-radius:50%;
  background:var(--primary);
}

/* FAQ */
.faq-list{display:grid;gap:14px}
.faq-item{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 24px;font-size:16px;font-weight:600;color:var(--dark);text-align:left;
  transition:background .2s ease;
}
.faq-q:hover{background:var(--primary-soft)}
.faq-icon{color:var(--primary);flex-shrink:0;transition:transform .3s ease}
.faq-item.open .faq-icon{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .32s ease}
.faq-a p{padding:0 24px 22px;font-size:15px;color:var(--text-2)}

/* 下载区域 */
.download{background:linear-gradient(180deg,#fff 0%,#FFF3E8 100%);text-align:center}
.download-title{font-size:clamp(30px,4.2vw,46px);font-weight:800;color:var(--dark);letter-spacing:.5px}
.download-meta{margin:14px 0 34px;font-size:15px;color:var(--text-2)}
.download-btns{display:flex;gap:18px;justify-content:center;flex-wrap:wrap}
.download-tip{margin-top:30px;font-size:15.5px;color:var(--primary-deep);font-weight:600}

/* 页脚 */
.footer{padding:34px 24px;background:var(--dark);text-align:center}
.footer p{font-size:14.5px;color:rgba(255,255,255,.72)}
.footer a{color:#fff}
.footer a:hover{color:var(--primary)}

/* 返回顶部 */
.back-top{
  position:fixed;right:26px;bottom:30px;z-index:90;
  width:46px;height:46px;border-radius:50%;
  background:var(--primary);color:#fff;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 10px 24px rgba(255,122,24,.35);
  opacity:0;visibility:hidden;pointer-events:none;
  transform:translateY(12px);
  transition:opacity .25s ease,transform .25s ease,visibility .25s ease,background .2s ease;
}
.back-top.show{opacity:1;visibility:visible;pointer-events:auto;transform:translateY(0)}
.back-top:hover{background:var(--primary-deep)}

/* 平板 */
@media (max-width:1024px){
  .works-grid{grid-template-columns:repeat(2,1fr)}
  .feat-grid{grid-template-columns:repeat(2,1fr)}
  .rev-grid{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .intro-grid{grid-template-columns:1fr;gap:36px}
  .hero{padding:60px 0 72px}
  .section{padding:68px 0}
}

/* 手机 */
@media (max-width:768px){
  .container{padding:0 20px}
  .nav-inner{gap:10px}
  .logo{font-size:18px;min-height:44px}
  .nav-links{display:none}
  .btn-nav{margin-left:auto;font-size:14px;padding:8px 16px;min-height:44px}
  .hero{padding:44px 0 60px;background:linear-gradient(180deg,#FFF8F1 0%,#fff 60%)}
  .hero-inner{grid-template-columns:1fr;gap:36px;text-align:center}
  .hero-text h1{font-size:32px}
  .hero-desc{margin:18px auto 28px;font-size:15.5px;text-align:left}
  .hero-btns{flex-direction:column;width:100%;gap:12px}
  .hero-btns .btn{width:100%}
  .hero-img img{width:78%;max-width:320px}
  .section{padding:56px 0}
  .section-sub{margin-bottom:32px}
  .works-grid{grid-template-columns:1fr;gap:20px}
  .feat-grid{grid-template-columns:1fr;gap:16px}
  .table-wrap{border-radius:var(--radius)}
  .cmp-table{min-width:720px;white-space:nowrap}
  .cmp-table th,.cmp-table td{padding:14px 16px}
  .table-hint{display:block}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:14px}
  .stat-card{padding:26px 14px}
  .rev-grid{grid-template-columns:1fr;gap:16px}
  .version-card{padding:26px 22px}
  .version-head h3{font-size:22px}
  .faq-q{padding:17px 18px;font-size:15px}
  .faq-a p{padding:0 18px 18px}
  .download-meta{margin:12px 0 26px;font-size:13px}
  .download-btns{flex-direction:column;width:100%;gap:12px}
  .download-btns .btn{width:100%}
  .download-tip{margin-top:24px;font-size:14.5px}
  .back-top{right:16px;bottom:20px;width:42px;height:42px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
}