/* 基础变量 */
:root{
  --main:#ff5f8f;
  --main-dark:#f04a7e;
  --main-light:#ffe9f1;
  --dark:#33242d;
  --text:#4a3944;
  --text-light:#7a6873;
  --border:#f2e3ea;
  --bg:#fffafc;
  --bg-soft:#fdf1f6;
  --card:#ffffff;
  --radius:16px;
  --shadow:0 8px 24px rgba(255,95,143,.10);
  --shadow-hover:0 16px 36px rgba(255,95,143,.20);
  --header-h:64px;
}

/* 全局重置 */
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Segoe UI",Roboto,sans-serif;
  color:var(--text);
  background:var(--bg);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{text-decoration:none;color:inherit}
ul,ol{list-style:none}
button{font-family:inherit;border:none;background:none;cursor:pointer;color:inherit}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
section[id]{scroll-margin-top:calc(var(--header-h) + 10px)}
.js .reveal{opacity:0;transform:translateY(22px);transition:opacity .6s ease,transform .6s ease}
.js .reveal.in{opacity:1;transform:none}

/* 通用卡片 hover 上浮 */
.work-card,
.feature-card,
.stat-item,
.review-card{transition:transform .3s,box-shadow .3s}
.work-card:hover,
.feature-card:hover,
.stat-item:hover,
.review-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}

/* 顶部导航 */
.header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:rgba(255,250,252,.92);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:box-shadow .3s,border-color .3s;
}
.header.scrolled{border-color:var(--border);box-shadow:0 4px 20px rgba(51,36,45,.06)}
.nav{display:flex;align-items:center;justify-content:space-between;height:var(--header-h)}
.logo{font-size:24px;font-weight:800;color:var(--dark);letter-spacing:1px;line-height:1.2}
.logo span{color:var(--main)}
.nav-links{display:flex;align-items:center;gap:2px}
.nav-links a{
  display:block;padding:8px 11px;font-size:14px;color:var(--text);
  border-radius:8px;transition:color .25s,background .25s;
}
.nav-links a:hover{color:var(--main);background:var(--main-light)}
.nav-links a.active{color:var(--main);font-weight:600}
.btn-nav{
  padding:8px 16px;font-size:14px;font-weight:600;color:#fff;
  background:var(--main);border-radius:999px;
  transition:background .25s,transform .25s,box-shadow .25s;
}
.btn-nav:hover{background:var(--main-dark);transform:translateY(-1px);box-shadow:0 6px 16px rgba(255,95,143,.35)}

/* 通用按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:13px 28px;border-radius:999px;font-size:16px;font-weight:600;
  transition:all .25s;
}
.btn-primary{background:var(--main);color:#fff;box-shadow:0 8px 20px rgba(255,95,143,.3)}
.btn-primary:hover{background:var(--main-dark);transform:translateY(-2px);box-shadow:0 12px 26px rgba(255,95,143,.4)}
.btn-outline{background:#fff;color:var(--main);border:2px solid var(--main)}
.btn-outline:hover{background:var(--main-light);transform:translateY(-2px)}

/* Hero */
.hero{
  padding:calc(var(--header-h) + 56px) 0 72px;
  background:linear-gradient(180deg,var(--main-light) 0%,var(--bg) 100%);
}
.hero-inner{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
.hero h1,.download h1{font-weight:800;color:var(--dark);line-height:1.3}
.hero h1{font-size:44px}
.hero h1 .ver,.download h1 .ver{
  color:var(--main);font-size:.6em;vertical-align:middle;margin-left:6px;letter-spacing:1px;
}
.hero-desc{margin:20px 0 34px;font-size:17px;color:var(--text);max-width:560px}
.hero-btns,.download-btns{display:flex;gap:16px;flex-wrap:wrap}
.download-btns{justify-content:center}
.hero-img{text-align:center}
.hero-img img{
  width:100%;max-width:360px;margin:0 auto;border-radius:24px;
  box-shadow:0 20px 48px rgba(255,95,143,.25);
}

/* 区块通用 */
.section{padding:76px 0}
.section-alt{background:var(--bg-soft)}
.section-title{font-size:32px;font-weight:800;color:var(--dark);text-align:center;line-height:1.3}
.section-title::after{content:"";display:block;width:48px;height:4px;border-radius:4px;background:var(--main);margin:14px auto 0}
.section-sub{text-align:center;color:var(--text-light);font-size:15px;margin-top:10px;margin-bottom:46px}

/* 作品预览 */
.works-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.work-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}

/* 产品介绍 */
.about-wrap{max-width:820px;margin:0 auto;display:grid;grid-template-columns:1fr 1fr;gap:28px}
.about-wrap p{font-size:15.5px;color:var(--text);text-align:justify}
.about-tags{display:flex;justify-content:center;gap:14px;margin-top:32px;flex-wrap:wrap}
.tag{
  padding:8px 22px;border-radius:999px;background:var(--card);
  border:1px solid var(--border);color:var(--main-dark);font-size:14px;font-weight:600;
  box-shadow:var(--shadow);
}

/* 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(--border);border-radius:var(--radius);
  padding:30px 26px;
}
.feature-icon{
  display:inline-flex;align-items:center;justify-content:center;
  width:52px;height:52px;border-radius:14px;background:var(--main-light);color:var(--main);
}
.feature-icon svg{width:26px;height:26px}
.feature-card h3{font-size:18px;font-weight:700;color:var(--dark);margin:16px 0 8px}
.feature-card p{font-size:14px;color:var(--text-light)}

/* 优势对比 */
.compare-table{
  max-width:900px;margin:0 auto;background:var(--card);
  border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;
}
.compare-row{display:grid;grid-template-columns:1fr 1.7fr 1.7fr}
.compare-row + .compare-row{border-top:1px solid var(--border)}
.compare-cell{padding:16px 22px;font-size:15px;color:var(--text)}
.compare-head .compare-cell{font-weight:700;color:var(--dark);background:var(--bg-soft)}
.compare-head .highlight{background:var(--main-light);color:var(--main-dark)}
.compare-cell.highlight{color:var(--main-dark);font-weight:600}

/* 平台数据 */
.stats-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:20px}
.stat-item{
  text-align:center;background:var(--card);border:1px solid var(--border);
  border-radius:var(--radius);padding:28px 12px;
}
.stat-num{font-size:36px;font-weight:800;color:var(--main);line-height:1.2}
.stat-label{font-size:14px;color:var(--text-light);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(--border);border-radius:var(--radius);padding:24px}
.review-head{display:flex;align-items:center;gap:14px;margin-bottom:14px}
.avatar{
  width:46px;height:46px;border-radius:50%;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--main),#ff9ab5);
  color:#fff;font-size:20px;font-weight:700;
}
.review-meta{display:flex;flex-direction:column}
.review-name{font-size:15px;font-weight:700;color:var(--dark)}
.stars{color:#ffb400;font-size:13px;letter-spacing:2px}
.review-text{font-size:14px;color:var(--text)}

/* 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:34px 36px;
  box-shadow:var(--shadow);
}
.update-head{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  border-bottom:1px dashed var(--border);padding-bottom:18px;
}
.version-badge{background:var(--main);color:#fff;padding:6px 18px;border-radius:999px;font-size:16px;font-weight:700}
.update-date{font-size:14px;color:var(--text-light)}
.update-list{margin-top:20px}
.update-list li{position:relative;padding-left:22px;font-size:15px;color:var(--text);margin-bottom:13px}
.update-list li::before{
  content:"";position:absolute;left:0;top:9px;
  width:8px;height:8px;border-radius:50%;background:var(--main);
}

/* FAQ */
.faq-list{max-width:760px;margin:0 auto}
.faq-item{
  background:var(--card);border:1px solid var(--border);border-radius:14px;
  margin-bottom:14px;overflow:hidden;transition:box-shadow .3s;
}
.faq-item:hover{box-shadow:var(--shadow)}
.faq-q{
  width:100%;display:flex;justify-content:space-between;align-items:center;gap:12px;
  padding:18px 22px;text-align:left;font-size:16px;font-weight:600;color:var(--dark);
}
.faq-icon{position:relative;width:18px;height:18px;flex-shrink:0}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--main);border-radius:2px;transition:transform .3s}
.faq-icon::before{width:18px;height:2px;top:8px;left:0}
.faq-icon::after{width:2px;height:18px;top:0;left:8px}
.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 22px 20px;font-size:15px;color:var(--text-light)}

/* 下载区域 */
.download{
  text-align:center;
  background:linear-gradient(180deg,var(--bg-soft) 0%,var(--bg) 60%,var(--main-light) 100%);
}
.download-inner{max-width:760px}
.download h1{font-size:38px}
.download-meta{margin:16px 0 32px;font-size:15px;color:var(--text-light)}
.download-tip{margin-top:28px;font-size:15px;color:var(--text)}

/* 页脚 */
.footer{background:var(--dark);padding:30px 0;text-align:center}
.footer p{color:rgba(255,255,255,.72);font-size:14px}
.footer a{color:#fff;font-weight:600}

/* 返回顶部 */
.back-top{
  position:fixed;right:26px;bottom:26px;z-index:90;
  width:46px;height:46px;border-radius:50%;
  background:var(--main);color:#fff;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 8px 20px rgba(255,95,143,.35);
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:all .3s;
}
.back-top svg{width:20px;height:20px}
.back-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.back-top:hover{background:var(--main-dark)}

/* 平板适配 */
@media (max-width:992px){
  .nav-links a{padding:8px 8px;font-size:13px}
  .hero h1{font-size:36px}
  .works-grid{grid-template-columns:repeat(2,1fr)}
  .features-grid{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(3,1fr)}
  .reviews-grid{grid-template-columns:repeat(2,1fr)}
  .download h1{font-size:32px}
}
@media (max-width:900px){
  .nav-links{display:none}
}
@media (max-width:768px){
  .container{padding:0 20px}
  .section{padding:56px 0}
  .section-sub{margin-bottom:34px}
  .hero{padding:calc(var(--header-h) + 36px) 0 48px}
  .hero-inner{grid-template-columns:1fr;gap:32px;text-align:center}
  .hero h1{font-size:32px}
  .hero-desc{font-size:15px;max-width:none;margin:16px 0 28px;text-align:justify}
  .hero-btns,.download-btns{flex-direction:column;align-items:stretch}
  .hero-btns .btn,.download-btns .btn{width:100%}
  .hero-img img{max-width:300px}
  .about-wrap{grid-template-columns:1fr;gap:18px}
  .about-wrap p{font-size:15px}
  .features-grid{grid-template-columns:1fr}
  .works-grid{grid-template-columns:1fr;gap:20px}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:14px}
  .stat-item{padding:22px 10px}
  .stat-num{font-size:30px}
  .reviews-grid{grid-template-columns:1fr}
  .compare-cell{padding:12px 10px;font-size:13px}
  .update-card{padding:26px 22px}
  .update-head{flex-direction:column;align-items:flex-start;gap:10px}
  .download h1{font-size:28px}
  .download-meta{font-size:13px;white-space:nowrap;margin:14px 0 26px}
  .download-btns{gap:14px}
  .back-top{right:18px;bottom:18px;width:42px;height:42px}
}
@media (max-width:480px){
  .hero h1{font-size:28px}
  .section-title{font-size:26px}
  .btn{padding:12px 22px;font-size:15px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .js .reveal{opacity:1;transform:none;transition:none}
  .faq-a{transition:none}
}