/* 火焰视频 官网落地页样式 */
:root{
  --primary:#F5421C;
  --primary-deep:#D92F0F;
  --grad:linear-gradient(135deg,#FF8A3D 0%,#F5421C 100%);
  --dark:#22110C;
  --text:#2B1F1A;
  --text-2:#6E5B52;
  --bg:#FBF8F4;
  --card:#FFFFFF;
  --line:#F0E3DA;
  --radius:16px;
  --shadow:0 6px 18px rgba(245,66,28,.08);
  --shadow-hover:0 14px 30px rgba(245,66,28,.16);
  --star:#FFB400;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:76px}
body{font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",-apple-system,"Segoe UI",Roboto,sans-serif;background:var(--bg);color:var(--text);line-height:1.7;-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%;height:auto}
a{text-decoration:none;color:inherit}
ul{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:88px 0}
.section-head{text-align:center;margin-bottom:52px}
.section-head h2{font-size:32px;font-weight:800;color:var(--dark);display:inline-block;position:relative}
.section-head h2::after{content:"";display:block;width:52px;height:4px;border-radius:2px;background:var(--grad);margin:12px auto 0}
.section-head p{color:var(--text-2);font-size:15px;margin-top:12px}
.btn{display:inline-flex;align-items:center;justify-content:center;border-radius:999px;font-weight:600;cursor:pointer;transition:transform .25s ease,box-shadow .25s ease,background .25s ease,border-color .25s ease}
.btn-primary{background:var(--grad);color:#fff;padding:14px 30px;font-size:15px;box-shadow:0 8px 20px rgba(245,66,28,.28)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 26px rgba(245,66,28,.36)}
.btn-ghost{background:var(--card);color:var(--primary-deep);border:1.5px solid var(--primary);padding:13px 28px;font-size:15px}
.btn-ghost:hover{transform:translateY(-2px);box-shadow:var(--shadow);background:#FFF7F3}
/* 导航栏 */
.site-header{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(255,255,255,.94);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--line);transition:box-shadow .3s ease}
.site-header.scrolled{box-shadow:0 6px 24px rgba(34,17,12,.08)}
.header-inner{max-width:1200px;margin:0 auto;padding:0 24px;height:64px;display:flex;align-items:center;gap:30px}
.logo{display:flex;align-items:center;gap:8px;font-size:22px;font-weight:800;color:var(--dark);white-space:nowrap}
.logo svg{width:26px;height:26px;flex:0 0 auto}
.main-nav{display:flex;gap:20px;align-items:center;margin-left:auto}
.main-nav a{font-size:14px;color:var(--text-2);font-weight:500;transition:color .2s ease;white-space:nowrap}
.main-nav a:hover{color:var(--primary)}
.btn-download{padding:4px 14px;font-size:13px;font-weight:600;background:var(--grad);color:#fff;border-radius:999px;transition:transform .25s ease,box-shadow .25s ease}
.btn-download:hover{transform:translateY(-1px);box-shadow:0 6px 14px rgba(245,66,28,.3)}
/* Hero */
.hero{padding:148px 0 100px;background:radial-gradient(1100px 460px at 88% -8%,rgba(255,138,61,.16),transparent 60%)}
.hero-inner{display:flex;align-items:center;gap:64px}
.hero-text{flex:1 1 auto;min-width:0}
.hero-text h1{font-size:44px;font-weight:800;color:var(--dark);line-height:1.25}
.hero-text h1 .ver,.download h1 .ver,.data-card .num{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-text h1 .ver{font-size:24px;font-weight:800;margin-left:12px}
.hero-desc{color:var(--text-2);font-size:16px;line-height:1.9;margin:22px 0 34px;max-width:600px}
.hero-btns{display:flex;gap:16px;flex-wrap:wrap}
.hero-media{flex:0 0 320px}
.hero-media img{border-radius:var(--radius);box-shadow:0 18px 40px rgba(34,17,12,.16)}
/* 作品预览 */
.works-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.works-grid img{border-radius:var(--radius);box-shadow:var(--shadow);transition:transform .3s ease,box-shadow .3s ease}
.works-grid img:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
/* 产品介绍 */
.product-inner{display:flex;gap:60px;align-items:center}
.product-lead{flex:1 1 46%}
.product-lead .lead-strong{font-size:17px;font-weight:600;color:var(--dark);line-height:1.9;border-left:4px solid var(--primary);padding-left:14px;margin-bottom:18px}
.product-lead p{font-size:15.5px;color:var(--text);line-height:2;margin-bottom:14px}
.product-points{flex:1 1 54%;display:grid;gap:16px}
.point{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px 22px;display:flex;gap:16px;align-items:flex-start;transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease}
.point:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:transparent}
.point .p-num{flex:0 0 38px;height:38px;border-radius:10px;background:rgba(245,66,28,.1);color:var(--primary-deep);font-weight:700;display:flex;align-items:center;justify-content:center;font-size:15px}
.point h3{font-size:16.5px;color:var(--dark);margin-bottom:5px}
.point p{font-size:14px;color:var(--text-2);line-height:1.8}
/* 核心功能 */
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:30px 26px;transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease}
.feature-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover);border-color:transparent}
.feature-icon{width:50px;height:50px;border-radius:14px;background:rgba(245,66,28,.09);color:var(--primary);display:flex;align-items:center;justify-content:center;margin-bottom:18px}
.feature-icon svg{width:26px;height:26px}
.feature-card h3{font-size:18px;color:var(--dark);margin-bottom:9px}
.feature-card p{font-size:14px;color:var(--text-2);line-height:1.8}
/* 优势对比 */
.compare-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;border:1px solid var(--line);border-radius:var(--radius);background:var(--card);box-shadow:var(--shadow)}
.compare-table{width:100%;min-width:560px;border-collapse:collapse;font-size:14px}
.compare-table th,.compare-table td{padding:15px 18px;text-align:left;white-space:nowrap;border-bottom:1px solid var(--line)}
.compare-table thead th{color:#fff;font-weight:600}
.compare-table thead th:first-child{background:var(--dark)}
.compare-table thead th:nth-child(2){background:var(--grad)}
.compare-table thead th:nth-child(3){background:#46302A}
.compare-table tbody tr:last-child td{border-bottom:none}
.compare-table td:first-child{font-weight:600;color:var(--dark)}
.compare-table td:nth-child(2){color:var(--primary-deep);font-weight:600;background:rgba(255,138,61,.07)}
.compare-hint{display:none;text-align:center;font-size:12px;color:var(--text-2);margin-top:12px}
/* 平台数据 */
.data-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.data-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:36px 16px 30px;text-align:center;transition:transform .25s ease,box-shadow .25s ease}
.data-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.data-card .num{font-size:40px;font-weight:800;line-height:1.2}
.data-card .label{font-size:14px;color:var(--text-2);margin-top:8px}
/* 用户评价 */
.reviews-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.review-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:transform .25s ease,box-shadow .25s ease}
.review-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.review-top{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.review-avatar{width:46px;height:46px;border-radius:50%;background:var(--grad);color:#fff;font-size:19px;font-weight:700;display:flex;align-items:center;justify-content:center;flex:0 0 auto}
.review-name{font-weight:700;color:var(--dark);font-size:15px}
.review-stars{color:var(--star);font-size:13px;letter-spacing:3px;margin-top:2px}
.review-card>p{font-size:14px;color:var(--text-2);line-height:1.85}
/* 版本更新 */
.update-card{max-width:780px;margin:0 auto;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:40px;box-shadow:var(--shadow)}
.update-head{display:flex;align-items:baseline;gap:14px;flex-wrap:wrap;padding-bottom:18px;border-bottom:1px solid var(--line);margin-bottom:10px}
.update-head .ver{font-size:30px;font-weight:800;color:var(--primary-deep)}
.update-head .tag{font-size:12px;font-weight:600;color:#fff;background:var(--grad);border-radius:6px;padding:3px 10px}
.update-time{font-size:14px;color:var(--text-2);margin-left:auto}
.update-list{padding-top:8px}
.update-list li{position:relative;padding:10px 0 10px 26px;font-size:14.5px;color:var(--text);border-bottom:1px dashed var(--line)}
.update-list li:last-child{border-bottom:none}
.update-list li::before{content:"";position:absolute;left:4px;top:17px;width:8px;height:8px;border-radius:50%;background:var(--grad)}
/* FAQ */
.faq-list{max-width:820px;margin:0 auto;display:grid;gap:14px}
.faq-item{background:var(--card);border:1px solid var(--line);border-radius:14px;overflow:hidden;transition:box-shadow .3s ease}
.faq-item.open{box-shadow:var(--shadow)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:19px 24px;background:none;border:none;cursor:pointer;text-align:left;font-family:inherit;font-size:15.5px;font-weight:600;color:var(--dark)}
.faq-icon{position:relative;flex:0 0 20px;width:20px;height:20px}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--primary);border-radius:2px;transition:transform .3s ease,opacity .3s ease}
.faq-icon::before{width:2px;height:16px;left:9px;top:2px}
.faq-icon::after{width:16px;height:2px;left:2px;top:9px}
.faq-item.open .faq-icon::before{transform:rotate(90deg);opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-a p{padding:0 24px 20px;font-size:14.5px;color:var(--text-2);line-height:1.9}
/* 下载区域 */
.download{background:linear-gradient(165deg,#2A1610 0%,#1D0E0A 55%,#2C150B 100%);color:#fff;padding:96px 0}
.download h1{font-size:38px;font-weight:800;text-align:center}
.download h1 .ver{font-size:22px;font-weight:800;margin-left:12px}
.download-meta{text-align:center;color:#C9B5AA;font-size:14px;margin:16px 0 34px}
.download-btns{display:flex;justify-content:center;gap:18px;flex-wrap:wrap}
.download-btns .btn{padding:15px 34px;font-size:15.5px}
.download-btns .btn-ghost{border-color:rgba(255,255,255,.55);color:#fff;background:rgba(255,255,255,.06)}
.download-btns .btn-ghost:hover{background:rgba(255,255,255,.14)}
.download-tip{text-align:center;color:#EAD9CF;font-size:14px;margin-top:30px}
/* 页脚 */
.site-footer{padding:30px 0;text-align:center;background:var(--card);border-top:1px solid var(--line);font-size:14px;color:var(--text-2)}
.site-footer a{color:var(--primary-deep);font-weight:600}
.site-footer a:hover{color:var(--primary)}
/* 返回顶部 */
.to-top{position:fixed;right:26px;bottom:30px;width:46px;height:46px;border-radius:50%;border:none;background:var(--grad);color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:0 10px 24px rgba(245,66,28,.35);opacity:0;visibility:hidden;transform:translateY(12px);transition:opacity .3s ease,transform .3s ease,visibility .3s;z-index:90}
.to-top svg{width:20px;height:20px}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{transform:translateY(-3px)}
/* 响应式 */
@media (max-width:1023px){
  .header-inner{gap:18px;padding:0 20px}
  .main-nav{gap:12px}
  .main-nav a{font-size:13px}
  .hero-text h1{font-size:38px}
  .hero-media{flex-basis:280px}
  .works-grid{grid-template-columns:repeat(2,1fr)}
  .features-grid{grid-template-columns:repeat(2,1fr)}
  .reviews-grid{grid-template-columns:repeat(2,1fr)}
  .data-grid{grid-template-columns:repeat(2,1fr)}
  .product-inner{flex-direction:column;gap:40px}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .section{padding:60px 0}
  .section-head{margin-bottom:36px}
  .section-head h2{font-size:25px}
  .header-inner{height:56px;padding:0 20px}
  .main-nav{display:none}
  .btn-download{margin-left:auto;padding:8px 16px;font-size:12.5px}
  .logo{font-size:19px;padding:12px 0}
  .hero{padding:96px 0 56px}
  .hero-inner{flex-direction:column;gap:34px}
  .hero-text h1{font-size:29px}
  .hero-text h1 .ver{font-size:17px}
  .hero-desc{font-size:15px;margin:16px 0 26px}
  .hero-btns{flex-direction:column;width:100%}
  .hero-btns .btn{width:100%}
  .hero-media{flex:0 0 auto;width:100%;max-width:340px;margin:0 auto}
  .works-grid{grid-template-columns:1fr;gap:20px}
  .features-grid{grid-template-columns:1fr;gap:16px}
  .reviews-grid{grid-template-columns:1fr;gap:16px}
  .data-grid{grid-template-columns:repeat(2,1fr);gap:14px}
  .data-card{padding:26px 12px 22px}
  .data-card .num{font-size:30px}
  .compare-hint{display:block}
  .update-card{padding:28px 22px}
  .update-head .ver{font-size:24px}
  .update-time{width:100%;margin-left:0}
  .download{padding:68px 0}
  .download h1{font-size:27px}
  .download h1 .ver{font-size:16px}
  .download-meta{font-size:12px;white-space:nowrap;margin:12px 0 26px}
  .download-btns{flex-direction:column;width:100%}
  .download-btns .btn{width:100%}
  .to-top{right:16px;bottom:20px;width:42px;height:42px}
}