:root{
  --primary:#FF6A1F;
  --primary-deep:#E8510B;
  --primary-soft:#FFF1E8;
  --dark:#171A23;
  --text:#232733;
  --text-sub:#5D6472;
  --border:#E9ECF3;
  --bg:#F7F8FB;
  --card:#FFFFFF;
  --star:#FFA000;
  --radius:18px;
  --shadow:0 10px 30px rgba(23,26,35,.06);
  --shadow-hover:0 16px 40px rgba(255,106,31,.14);
  --nav-h:64px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--nav-h) + 18px)}
body{
  font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  color:var(--text);background:var(--bg);line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
.container{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;height:var(--nav-h);
  background:rgba(255,255,255,.92);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--border);
}
.nav-inner{
  max-width:1200px;margin:0 auto;height:100%;padding:0 24px;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
}
.logo{font-size:22px;font-weight:800;color:var(--dark);letter-spacing:.5px;white-space:nowrap}
.logo b{color:var(--primary)}
.nav-links{display:flex;gap:20px;font-size:14px;color:var(--text-sub)}
.nav-links a{transition:.2s;white-space:nowrap}
.nav-links a:hover,.nav-links a.active{color:var(--primary);font-weight:600}
.nav-download{
  font-size:12px;font-weight:600;color:#fff;background:var(--primary);
  padding:5px 13px;border-radius:999px;white-space:nowrap;transition:.25s;
}
.nav-download:hover{background:var(--primary-deep)}

/* ===== 首屏 Hero ===== */
.hero{
  background:linear-gradient(180deg,#FFF4EC 0%,#FFF 100%);
  padding:calc(var(--nav-h) + 76px) 0 96px;position:relative;overflow:hidden;
}
.hero::before,.hero::after{
  content:"";position:absolute;border-radius:50%;filter:blur(90px);pointer-events:none;
}
.hero::before{width:440px;height:440px;background:rgba(255,106,31,.14);top:-130px;right:-90px}
.hero::after{width:360px;height:360px;background:rgba(255,160,0,.12);bottom:-120px;left:-90px}
.hero-inner{
  display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;
  position:relative;z-index:1;
}
.hero-text h1{font-size:46px;line-height:1.3;font-weight:800;color:var(--dark)}
.ver-badge{
  display:inline-block;vertical-align:middle;margin-left:10px;
  padding:4px 16px;font-size:16px;font-weight:700;color:#fff;
  background:linear-gradient(135deg,var(--primary),#FF9A3D);border-radius:999px;
}
.hero-desc{font-size:17px;color:var(--text-sub);margin:22px 0 34px;max-width:560px}
.hero-btns{display:flex;gap:16px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:13px 30px;font-size:16px;font-weight:600;
  border-radius:999px;transition:.25s;
}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 8px 20px rgba(255,106,31,.3)}
.btn-primary:hover{background:var(--primary-deep);transform:translateY(-2px)}
.btn-dark{background:var(--dark);color:#fff}
.btn-dark:hover{background:#2A2F3E;transform:translateY(-2px)}
.hero-img{max-width:430px;margin:0 auto;width:100%}
.hero-img img{
  width:100%;border-radius:24px;box-shadow:var(--shadow);
  animation:float 6s ease-in-out infinite;
}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}
.hero-text>*{animation:fadeUp .7s ease both}
.hero-text>*:nth-child(2){animation-delay:.12s}
.hero-text>*:nth-child(3){animation-delay:.24s}
@keyframes fadeUp{from{opacity:0;transform:translateY(22px)}to{opacity:1;transform:none}}

/* ===== 通用区块与卡片基础 ===== */
.section{padding:88px 0}
.sec-head{text-align:center;margin-bottom:52px}
.sec-head h2{font-size:34px;font-weight:800;color:var(--dark);position:relative;display:inline-block}
.sec-head h2::after{
  content:"";position:absolute;left:50%;bottom:-12px;transform:translateX(-50%);
  width:44px;height:4px;border-radius:4px;
  background:linear-gradient(90deg,var(--primary),#FFB45E);
}
.sec-head p{margin-top:20px;color:var(--text-sub);font-size:15px}
.work-card,.point,.feature-card,.review-card{
  background:var(--card);border:1px solid var(--border);
  border-radius:var(--radius);transition:.3s;
}
.work-card,.review-card{box-shadow:var(--shadow)}
.work-card:hover,.feature-card:hover,.review-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-hover)}

/* ===== 作品预览 ===== */
.works-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.work-card{overflow:hidden}
.work-card img{width:100%}
.work-card figcaption{padding:14px 16px;font-size:14px;color:var(--text-sub);text-align:center}

/* ===== 产品介绍 ===== */
.about-body{max-width:920px;margin:0 auto}
.about-lead{font-size:17px;color:var(--text-sub);text-align:center;line-height:2}
.about-points{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:46px}
.point{padding:30px 24px;text-align:center}
.point:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.point strong{display:block;font-size:18px;color:var(--dark);margin-bottom:8px}
.point span{font-size:14px;color:var(--text-sub)}

/* ===== 核心功能 ===== */
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature-card{padding:32px 26px}
.feature-icon{
  width:58px;height:58px;border-radius:16px;background:var(--primary-soft);
  color:var(--primary-deep);display:flex;align-items:center;justify-content:center;
  margin-bottom:18px;
}
.feature-icon svg{width:28px;height:28px}
.feature-card h3{font-size:18px;color:var(--dark);margin-bottom:10px}
.feature-card p{font-size:14px;color:var(--text-sub)}

/* ===== 优势对比 ===== */
.table-wrap{
  overflow-x:auto;background:var(--card);border:1px solid var(--border);
  border-radius:var(--radius);box-shadow:var(--shadow);
}
.compare-table{width:100%;min-width:660px;border-collapse:collapse;font-size:14px}
.compare-table th,.compare-table td{padding:16px 20px;text-align:center;border-bottom:1px solid var(--border)}
.compare-table thead th{background:var(--bg);font-weight:700;color:var(--dark)}
.compare-table td:first-child,.compare-table th:first-child{text-align:left;font-weight:600}
.compare-table th.hl,.compare-table td.hl{background:var(--primary-soft);color:var(--primary-deep);font-weight:600}
.compare-table tbody tr:last-child td{border-bottom:none}
.compare-table tbody tr{transition:.2s}
.compare-table tbody tr:hover{background:#FFFBF7}

/* ===== 平台数据 ===== */
.section-data{background:var(--dark)}
.section-data .sec-head h2{color:#fff}
.section-data .sec-head p{color:rgba(255,255,255,.72)}
.data-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.data-item{
  background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);
  border-radius:var(--radius);padding:36px 20px;text-align:center;transition:.3s;
}
.data-item:hover{transform:translateY(-6px);border-color:rgba(255,106,31,.55)}
.data-item strong{display:block;font-size:38px;font-weight:800;color:var(--primary);line-height:1.2}
.data-item span{display:block;margin-top:8px;font-size:14px;color:rgba(255,255,255,.72)}

/* ===== 用户评价 ===== */
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.review-card{padding:26px}
.review-head{display:flex;align-items:center;gap:14px;margin-bottom:16px}
.avatar{
  width:46px;height:46px;border-radius:50%;flex-shrink:0;
  background:var(--primary-soft);color:var(--primary-deep);
  display:flex;align-items:center;justify-content:center;
  font-size:19px;font-weight:700;
}
.review-card:nth-child(3n+2) .avatar{background:#EAF3FF;color:#2B6FD8}
.review-card:nth-child(3n) .avatar{background:#EAFBF1;color:#16A34A}
.review-user h3{font-size:16px;color:var(--dark)}
.stars{color:var(--star);font-size:14px;letter-spacing:2px}
.review-card>p{font-size:14px;color:var(--text-sub);line-height:1.8}

/* ===== 版本更新 ===== */
.version-card{
  background:var(--card);border:1px solid var(--border);border-radius:20px;
  box-shadow:var(--shadow);overflow:hidden;
  display:grid;grid-template-columns:330px 1fr;
}
.version-left{
  background:linear-gradient(160deg,var(--dark),#2A2F3E);color:#fff;
  padding:46px 38px;display:flex;flex-direction:column;align-items:flex-start;
  justify-content:center;gap:12px;
}
.ver-tag{
  font-size:12px;padding:4px 14px;border-radius:999px;
  background:rgba(255,106,31,.18);color:#FF9A5C;border:1px solid rgba(255,106,31,.45);
}
.ver-num{font-size:40px;font-weight:800;letter-spacing:1px}
.ver-date{font-size:13px;color:rgba(255,255,255,.66)}
.version-log{list-style:none;padding:38px 42px;display:flex;flex-direction:column;gap:14px}
.version-log li{position:relative;padding-left:26px;font-size:14.5px;color:var(--text);line-height:1.7}
.version-log li::before{
  content:"";position:absolute;left:2px;top:9px;
  width:8px;height:8px;border-radius:50%;background:var(--primary);
}

/* ===== FAQ ===== */
.faq-list{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:16px}
.faq-item{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:.3s}
.faq-item.open{border-color:rgba(255,106,31,.4);box-shadow:var(--shadow)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 24px;background:none;border:none;cursor:pointer;
  font-size:16px;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:.3s;
}
.faq-icon::before{left:0;right:0;top:8px;height:2px}
.faq-icon::after{top:0;bottom:0;left:8px;width:2px}
.faq-item.open .faq-icon::after{transform:scaleY(0)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-a p{padding:0 24px 22px;font-size:14.5px;color:var(--text-sub);line-height:1.8}

/* ===== 下载区域 ===== */
.section-download{background:linear-gradient(180deg,#fff,var(--bg))}
.download-card{
  max-width:720px;margin:0 auto;text-align:center;
  background:var(--card);border:1px solid var(--border);border-radius:24px;
  box-shadow:var(--shadow);padding:64px 48px;
}
.download-card h1{font-size:36px;font-weight:800;color:var(--dark)}
.dl-info{margin:18px 0 32px;font-size:14px;color:var(--text-sub)}
.dl-btns{display:flex;gap:18px;justify-content:center;flex-wrap:wrap}
.dl-btns .btn{min-width:240px;padding:15px 32px;font-size:16px}
.dl-tip{
  margin-top:30px;display:inline-block;font-size:14px;color:var(--text-sub);
  background:var(--primary-soft);padding:10px 22px;border-radius:999px;
}

/* ===== 页脚 ===== */
.footer{background:var(--dark);padding:40px 0;text-align:center}
.footer-copy{font-size:14px;color:rgba(255,255,255,.72)}
.footer-link{color:#fff;font-weight:600;transition:.2s}
.footer-link:hover{color:var(--primary)}
.footer-sub{margin-top:8px;font-size:13px;color:rgba(255,255,255,.5)}

/* ===== 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:#fff;font-size:20px;
  box-shadow:0 10px 24px rgba(255,106,31,.35);
  opacity:0;visibility:hidden;transform:translateY(12px);transition:.3s;
}
.back-top.show{opacity:1;visibility:visible;transform:none}
.back-top:hover{background:var(--primary-deep)}

/* ===== 响应式 ===== */
@media (max-width:1024px){
  .hero-inner{gap:40px}
  .hero-text h1{font-size:38px}
  .works-grid,.features-grid,.review-grid{grid-template-columns:repeat(2,1fr)}
  .section{padding:72px 0}
}
@media (max-width:900px){
  .nav-links{display:none}
}
@media (max-width:768px){
  .container{padding:0 20px}
  .nav-inner{padding:0 20px}
  .logo{font-size:20px;display:flex;align-items:center;min-height:44px}
  .nav-download{font-size:11px;padding:5px 12px;display:inline-flex;align-items:center;min-height:36px}
  .hero{padding:calc(var(--nav-h) + 44px) 0 60px}
  .hero-inner{grid-template-columns:1fr;gap:36px;text-align:center}
  .hero-text h1{font-size:31px}
  .ver-badge{font-size:14px;margin-left:6px;padding:3px 12px}
  .hero-desc{font-size:15px;margin:18px auto 28px;max-width:100%}
  .hero-btns{flex-direction:column;width:100%}
  .hero-btns .btn{width:100%}
  .hero-img{max-width:320px}
  .section{padding:64px 0}
  .sec-head{margin-bottom:40px}
  .sec-head h2{font-size:26px}
  .works-grid,.features-grid,.review-grid,.about-points{grid-template-columns:1fr}
  .data-grid{grid-template-columns:repeat(2,1fr);gap:16px}
  .data-item{padding:28px 14px}
  .data-item strong{font-size:32px}
  .version-card{grid-template-columns:1fr}
  .version-left{padding:34px 28px}
  .version-log{padding:28px}
  .download-card{padding:48px 24px}
  .download-card h1{font-size:26px}
  .dl-info{font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .dl-btns{flex-direction:column}
  .dl-btns .btn{min-width:0;width:100%}
  .back-top{right:16px;bottom:20px;width:42px;height:42px;font-size:18px}
}