:root{
  --c-primary:#ff6f9c;
  --c-primary-deep:#f2547f;
  --c-dark:#2b2b3a;
  --c-text:#33334a;
  --c-muted:#6b6b7d;
  --c-border:#f5e6ef;
  --c-bg:#fffafc;
  --c-card:#fff;
  --c-light:#fdeef5;
  --radius:16px;
  --shadow:0 6px 20px rgba(255,111,156,.1);
  --shadow-hover:0 14px 30px rgba(255,111,156,.18);
  --grad:linear-gradient(135deg,#ff6f9c,#b06cf5);
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  background:var(--c-bg);
  color:var(--c-text);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
section{scroll-margin-top:72px}

/* ===== 顶部导航 ===== */
.header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:box-shadow .3s,border-color .3s;
}
.header.scrolled{border-color:var(--c-border);box-shadow:0 4px 16px rgba(43,43,58,.06)}
.header-in{display:flex;align-items:center;justify-content:space-between;height:64px;gap:28px}
.logo{
  font-size:22px;font-weight:800;white-space:nowrap;
  background:var(--grad);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.nav{display:flex;gap:22px;flex:1;justify-content:center}
.nav a{font-size:14px;color:var(--c-text);transition:color .2s}
.nav a:hover{color:var(--c-primary)}
.btn-nav{
  font-size:14px;font-weight:600;color:#fff;background:var(--grad);
  padding:8px 18px;border-radius:999px;white-space:nowrap;
  box-shadow:0 4px 12px rgba(255,111,156,.35);
  transition:transform .2s,box-shadow .2s;
}
.btn-nav:hover{transform:translateY(-2px);box-shadow:0 8px 18px rgba(255,111,156,.4)}

/* ===== 通用 ===== */
.sec-title{font-size:30px;font-weight:800;color:var(--c-dark);text-align:center;margin-bottom:40px}
.works,.features,.updates{padding:80px 0}
.about,.compare,.reviews,.faq{padding:80px 0;background:var(--c-card)}
.data{padding:80px 0;background:linear-gradient(180deg,#fff1f7,#fffafc)}

/* ===== 首屏Hero ===== */
.hero{
  padding:140px 0 80px;
  background:
    radial-gradient(600px 300px at 85% 20%,rgba(176,108,245,.12),transparent 60%),
    radial-gradient(500px 260px at 10% 80%,rgba(255,111,156,.14),transparent 60%),
    linear-gradient(180deg,#fff1f7,#fffafc);
}
.hero-in{display:grid;grid-template-columns:1fr 400px;gap:64px;align-items:center}
.hero h1{font-size:42px;font-weight:800;color:var(--c-dark);line-height:1.3;margin-bottom:20px}
.ver{
  display:inline-block;margin-left:12px;padding:4px 14px;
  font-size:18px;font-weight:700;color:var(--c-primary-deep);
  background:rgba(255,111,156,.12);border:1px solid rgba(255,111,156,.3);
  border-radius:999px;vertical-align:6px;white-space:nowrap;
}
.hero-desc{font-size:16px;color:var(--c-muted);line-height:1.9;margin-bottom:32px;max-width:560px}
.hero-btns{display:flex;gap:16px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:14px 32px;border-radius:999px;font-size:16px;font-weight:600;
  transition:transform .2s,box-shadow .2s;
}
.btn-primary{color:#fff;background:var(--grad);box-shadow:0 6px 18px rgba(255,111,156,.35)}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 12px 26px rgba(255,111,156,.42)}
.btn-ghost{color:var(--c-primary-deep);background:var(--c-card);border:1.5px solid rgba(255,111,156,.45)}
.btn-ghost:hover{transform:translateY(-3px);box-shadow:0 12px 26px rgba(255,111,156,.16)}
.hero-img{width:100%;max-width:400px;margin:0 auto}
.hero-img img{width:100%;height:auto;border-radius:24px;box-shadow:0 20px 44px rgba(255,111,156,.2)}

/* ===== 作品预览 ===== */
.works-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.work-card{
  border-radius:var(--radius);overflow:hidden;background:var(--c-card);
  box-shadow:var(--shadow);transition:transform .3s,box-shadow .3s;
}
.work-card img{width:100%;height:auto}
.work-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}

/* ===== 产品介绍 ===== */
.about-in{display:grid;grid-template-columns:1.2fr 1fr;gap:48px;align-items:center}
.about-text p{font-size:15px;color:var(--c-muted);line-height:1.9;margin-bottom:16px}
.about-text strong{color:var(--c-primary-deep);font-weight:700}
.about-cards{display:flex;flex-direction:column;gap:16px}
.about-card{
  display:flex;align-items:center;gap:16px;padding:18px 22px;
  background:var(--c-light);border:1px solid var(--c-border);border-radius:var(--radius);
  transition:transform .2s,box-shadow .2s;
}
.about-card strong{font-size:15px;color:var(--c-dark);white-space:nowrap}
.about-card span{font-size:13px;color:var(--c-muted)}
.about-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}

/* ===== 核心功能 ===== */
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature-card{
  padding:28px 24px;background:var(--c-card);border:1px solid var(--c-border);
  border-radius:var(--radius);box-shadow:var(--shadow);
  transition:transform .3s,box-shadow .3s;
}
.feature-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.f-icon{font-size:32px;margin-bottom:14px}
.feature-card h3{font-size:17px;color:var(--c-dark);margin-bottom:10px}
.feature-card p{font-size:14px;color:var(--c-muted);line-height:1.8}

/* ===== 优势对比 ===== */
.compare-table{border:1px solid var(--c-border);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.compare-row{display:grid;grid-template-columns:1.1fr 1.4fr 1.4fr}
.compare-row > .cell{
  padding:16px 20px;font-size:14px;color:var(--c-muted);
  border-bottom:1px solid var(--c-border);
  display:flex;align-items:center;
}
.compare-row.head > .cell{font-weight:700;color:var(--c-dark);background:var(--c-light);justify-content:center}
.compare-row .cell.main{color:var(--c-primary-deep);font-weight:600;background:rgba(255,111,156,.06)}
.compare-row:last-child > .cell{border-bottom:none}

/* ===== 平台数据 ===== */
.data-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.data-item{
  text-align:center;padding:32px 16px;background:var(--c-card);
  border:1px solid var(--c-border);border-radius:var(--radius);box-shadow:var(--shadow);
  transition:transform .3s,box-shadow .3s;
}
.data-item:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.data-item strong{
  display:block;font-size:36px;font-weight:800;margin-bottom:6px;
  background:var(--grad);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.data-item span{font-size:14px;color:var(--c-muted)}

/* ===== 用户评价 ===== */
.reviews-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.review-card{
  padding:24px;background:var(--c-bg);border:1px solid var(--c-border);
  border-radius:var(--radius);box-shadow:var(--shadow);
  transition:transform .3s,box-shadow .3s;
}
.review-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.review-head{display:flex;align-items:center;gap:14px;margin-bottom:14px}
.avatar{
  width:48px;height:48px;border-radius:50%;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  background:var(--grad);color:#fff;font-size:20px;font-weight:700;
}
.review-info{display:flex;flex-direction:column}
.review-name{font-size:15px;font-weight:700;color:var(--c-dark)}
.stars{font-size:14px;color:#ffb400;letter-spacing:2px}
.review-card p{font-size:14px;color:var(--c-muted);line-height:1.8}

/* ===== 版本更新 ===== */
.update-card{
  max-width:760px;margin:0 auto;padding:32px;
  background:var(--c-card);border:1px solid var(--c-border);
  border-radius:var(--radius);box-shadow:var(--shadow);
}
.update-head{display:flex;align-items:center;gap:16px;margin-bottom:20px;flex-wrap:wrap}
.update-ver{
  font-size:20px;font-weight:800;color:#fff;background:var(--grad);
  padding:6px 18px;border-radius:999px;
}
.update-date{font-size:14px;color:var(--c-muted)}
.update-list{list-style:none}
.update-list li{
  position:relative;padding:10px 0 10px 26px;
  font-size:15px;color:var(--c-text);line-height:1.8;
  border-bottom:1px dashed var(--c-border);
}
.update-list li:last-child{border-bottom:none}
.update-list li::before{
  content:"";position:absolute;left:4px;top:19px;
  width:8px;height:8px;border-radius:50%;background:var(--grad);
}

/* ===== FAQ ===== */
.faq-list{max-width:760px;margin:0 auto}
.faq-item{
  margin-bottom:16px;background:var(--c-bg);border:1px solid var(--c-border);
  border-radius:var(--radius);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:16px;
  padding:18px 22px;font-size:15px;font-weight:600;color:var(--c-dark);
  background:none;border:none;cursor:pointer;text-align:left;
}
.faq-icon{position:relative;width:20px;height:20px;flex-shrink:0}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;top:50%;left:50%;
  background:var(--c-primary);border-radius:2px;
  transition:opacity .3s;
}
.faq-icon::before{width:14px;height:2px;transform:translate(-50%,-50%)}
.faq-icon::after{width:2px;height:14px;transform:translate(-50%,-50%)}
.faq-item.open .faq-icon::after{opacity:0}
.faq-a{display:grid;grid-template-rows:0fr;transition:grid-template-rows .35s ease}
.faq-item.open .faq-a{grid-template-rows:1fr}
.faq-a-inner{overflow:hidden}
.faq-a-inner p{padding:0 22px 20px;font-size:14px;color:var(--c-muted);line-height:1.9}

/* ===== 下载区域 ===== */
.download{padding:90px 0;background:linear-gradient(180deg,#fff1f7,#fffafc)}
.download-in{max-width:720px;text-align:center}
.download-in h1{font-size:36px;font-weight:800;color:var(--c-dark);margin-bottom:14px}
.dl-meta{font-size:14px;color:var(--c-muted);margin-bottom:28px}
.dl-btns{display:flex;gap:16px;justify-content:center;margin-bottom:20px}
.dl-tip{font-size:14px;color:var(--c-text)}

/* ===== 页脚 ===== */
.footer{background:var(--c-dark);padding:28px 0}
.footer-in{text-align:center;font-size:14px;color:#c9c9d6}
.footer a{color:#fff;text-decoration:none;transition:color .2s}
.footer a:hover{color:var(--c-primary)}

/* ===== 返回顶部 ===== */
.back-top{
  position:fixed;right:24px;bottom:24px;z-index:99;
  width:44px;height:44px;border-radius:50%;border:none;cursor:pointer;
  background:var(--grad);color:#fff;font-size:18px;line-height:1;
  box-shadow:0 6px 16px rgba(255,111,156,.4);
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity .3s,transform .3s,visibility .3s;
}
.back-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.back-top:hover{transform:translateY(-3px)}

/* ===== 响应式 ===== */
@media (max-width:1024px){
  .hero-in{grid-template-columns:1fr 340px;gap:40px}
  .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);gap:16px}
  .nav{gap:14px}
}

@media (max-width:992px){
  .nav{display:none}
}

@media (max-width:768px){
  .container{padding:0 20px}
  .hero{padding:120px 0 56px}
  .hero-in{grid-template-columns:1fr;gap:32px;text-align:center}
  .hero-desc{max-width:none;margin-left:auto;margin-right:auto}
  .hero-btns{flex-direction:column}
  .hero-btns .btn{width:100%}
  .hero-img{max-width:300px}
  .works,.features,.updates,.about,.compare,.reviews,.faq,.data,.download{padding:56px 0}
  .sec-title{font-size:24px;margin-bottom:28px}
  .hero h1{font-size:30px}
  .ver{font-size:15px;padding:3px 10px}
  .works-grid{grid-template-columns:1fr}
  .features-grid{grid-template-columns:1fr}
  .about-in{grid-template-columns:1fr;gap:28px}
  .about-card{flex-direction:column;align-items:flex-start;gap:4px}
  .compare-row{grid-template-columns:1fr 1.3fr 1.3fr}
  .compare-row > .cell{padding:12px 10px;font-size:12px}
  .data-grid{grid-template-columns:repeat(2,1fr);gap:14px}
  .data-item strong{font-size:30px}
  .reviews-grid{grid-template-columns:1fr}
  .download-in h1{font-size:28px}
  .dl-meta{font-size:12px;white-space:nowrap}
  .dl-btns{flex-direction:column}
  .dl-btns .btn{width:100%}
  .back-top{right:16px;bottom:16px;width:40px;height:40px}
}