:root{
  --primary:#FF4D7E;
  --primary-deep:#E63E6E;
  --primary-soft:#FFE9F1;
  --dark:#2B1D28;
  --border:#FFD8E6;
  --bg:#FFF9FB;
  --bg-alt:#FFF1F6;
  --card:#FFFFFF;
  --text:#382833;
  --text-sub:#7C6472;
  --green:#16A34A;
  --gray:#6B7280;
  --gray-bg:#F1F2F4;
  --star:#FFB800;
  --radius:16px;
  --shadow:0 6px 18px rgba(255,77,126,.10);
  --shadow-hover:0 14px 30px rgba(255,77,126,.18);
}

*{margin:0;padding:0;box-sizing:border-box}

html{
  scroll-behavior:smooth;
  scroll-padding-top:76px;
}

body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}

img{display:block;max-width:100%}

a{color:inherit;text-decoration:none}

.container{
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
}

.container-narrow{max-width:860px}

/* ===== 顶部导航 ===== */
.header{
  position:sticky;
  top:0;
  z-index:100;
  background:rgba(255,249,251,.92);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--border);
  transition:box-shadow .3s;
}

.header.scrolled{box-shadow:0 4px 16px rgba(43,29,40,.06)}

.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  height:64px;
}

.logo{
  font-size:22px;
  font-weight:800;
  color:var(--primary);
  letter-spacing:1px;
  white-space:nowrap;
}

.nav{
  display:flex;
  align-items:center;
  gap:22px;
}

.nav a{
  font-size:14px;
  color:var(--text);
  transition:color .25s;
  white-space:nowrap;
}

.nav a:hover{color:var(--primary)}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border-radius:999px;
  cursor:pointer;
  font-weight:600;
  transition:transform .25s,box-shadow .25s,background .25s;
  white-space:nowrap;
}

.btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}

.btn-nav{
  font-size:13px;
  padding:9px 20px;
  background:var(--primary);
  color:#fff;
}

.btn-nav:hover{background:var(--primary-deep)}

.btn-primary{
  font-size:16px;
  padding:14px 34px;
  background:var(--primary);
  color:#fff;
}

.btn-primary:hover{background:var(--primary-deep)}

.btn-dark{
  font-size:16px;
  padding:14px 34px;
  background:var(--dark);
  color:#fff;
}

.btn-light{
  font-size:16px;
  padding:15px 40px;
  background:#fff;
  color:var(--primary);
}

.btn-light:hover{background:var(--primary-soft)}

/* ===== 首屏 Hero ===== */
.hero{
  background:linear-gradient(180deg,var(--primary-soft) 0%,var(--bg) 100%);
  padding:72px 0 88px;
}

.hero-inner{
  display:flex;
  align-items:center;
  gap:64px;
}

.hero-text{flex:1}

.hero h1{
  font-size:44px;
  line-height:1.25;
  font-weight:800;
  color:var(--text);
  margin-bottom:20px;
}

.hero-version{
  display:inline-block;
  font-size:20px;
  font-weight:700;
  color:var(--primary);
  background:var(--primary-soft);
  border:1px solid var(--border);
  border-radius:999px;
  padding:4px 14px;
  margin-left:6px;
  vertical-align:middle;
}

.hero-desc{
  font-size:17px;
  color:var(--text-sub);
  max-width:560px;
  margin-bottom:36px;
}

.hero-btns{display:flex;gap:16px;flex-wrap:wrap}

.hero-img{
  flex-shrink:0;
  width:320px;
}

.hero-img img{
  width:100%;
  height:auto;
  border-radius:var(--radius);
  box-shadow:var(--shadow-hover);
}

/* ===== 通用模块 ===== */
.section{padding:88px 0}

.section-alt{background:var(--bg-alt)}

.section-title{
  text-align:center;
  font-size:32px;
  font-weight:800;
  color:var(--text);
  margin-bottom:10px;
}

.section-sub{
  text-align:center;
  color:var(--text-sub);
  font-size:15px;
  margin-bottom:44px;
}

.card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  transition:transform .3s,box-shadow .3s;
}

.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}

/* ===== 作品预览 ===== */
.works-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
}

.work-img{
  width:100%;
  height:auto;
  border-radius:var(--radius);
  border:1px solid var(--border);
  box-shadow:var(--shadow);
  transition:transform .3s,box-shadow .3s;
}

.work-img:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}

/* ===== 产品介绍 ===== */
.about-cards{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:24px;
}

.about-card{padding:32px}

.about-card h3{
  font-size:20px;
  font-weight:700;
  color:var(--primary);
  margin-bottom:12px;
}

.about-card p{font-size:15px;color:var(--text-sub)}

/* ===== 核心功能 ===== */
.features-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}

.feature{padding:32px 28px}

.feature-icon{
  width:44px;
  height:44px;
  padding:10px;
  color:var(--primary);
  background:var(--primary-soft);
  border-radius:12px;
  margin-bottom:18px;
}

.feature h3{font-size:18px;font-weight:700;margin-bottom:8px}

.feature p{font-size:14px;color:var(--text-sub)}

/* ===== 优势对比 ===== */
.compare-table{
  max-width:860px;
  margin:0 auto;
  overflow:hidden;
}

.compare-row{
  display:grid;
  grid-template-columns:150px 1fr 1fr;
  align-items:center;
  gap:16px;
  padding:17px 28px;
  border-bottom:1px solid var(--border);
}

.compare-row:last-child{border-bottom:none}

.compare-head{
  background:var(--primary-soft);
  padding:14px 28px;
}

.compare-dim{
  color:var(--text-sub);
  font-size:14px;
  font-weight:600;
}

.compare-good,.compare-bad{
  display:flex;
  align-items:center;
  gap:9px;
  font-size:15px;
  font-weight:600;
  white-space:nowrap;
}

.compare-good{color:var(--green)}

.compare-bad{color:var(--gray)}

.compare-head .compare-good,
.compare-head .compare-bad{font-size:16px}

.compare-head .compare-good{color:var(--primary)}

.compare-head .compare-bad{color:var(--text-sub)}

.dot{
  width:9px;
  height:9px;
  border-radius:50%;
  flex-shrink:0;
}

.compare-good .dot{background:var(--green)}

.compare-bad .dot{background:var(--gray)}

/* ===== 平台数据 ===== */
.data-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
}

.data-item{
  text-align:center;
  padding:36px 20px;
}

.data-num{
  display:block;
  font-size:42px;
  font-weight:800;
  color:var(--primary);
  line-height:1.2;
}

.data-unit{font-size:22px}

.data-label{
  display:block;
  margin-top:8px;
  font-size:15px;
  color:var(--text-sub);
}

/* ===== 用户评价 ===== */
.reviews-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}

.review{padding:26px}

.review-head{
  display:flex;
  align-items:center;
  gap:14px;
  margin-bottom:14px;
}

.avatar{
  width:48px;
  height:48px;
  flex-shrink:0;
  border-radius:50%;
  background:linear-gradient(135deg,var(--primary),var(--primary-deep));
  color:#fff;
  font-size:20px;
  font-weight:700;
  display:flex;
  align-items:center;
  justify-content:center;
}

.review-user{display:flex;flex-direction:column}

.review-name{font-weight:700;font-size:16px}

.review-stars{color:var(--star);font-size:14px;letter-spacing:2px}

.review-text{font-size:14px;color:var(--text-sub)}

/* ===== 版本更新 ===== */
.update{padding:40px}

.update-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:12px;
  padding-bottom:20px;
  margin-bottom:20px;
  border-bottom:1px solid var(--border);
}

.update-version{
  font-size:24px;
  font-weight:800;
  color:var(--primary);
}

.update-time{
  font-size:14px;
  color:var(--text-sub);
  background:var(--gray-bg);
  padding:6px 16px;
  border-radius:999px;
}

.update-list{list-style:none}

.update-list li{
  position:relative;
  padding:10px 0 10px 28px;
  font-size:15px;
  color:var(--text);
}

.update-list li::before{
  content:"";
  position:absolute;
  left:6px;
  top:19px;
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--primary);
}

/* ===== FAQ ===== */
.faq-list{
  display:flex;
  flex-direction:column;
  gap:14px;
}

.faq-item{border-radius:var(--radius);overflow:hidden}

.faq-question{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  background:none;
  border:none;
  padding:20px 24px;
  font-size:16px;
  font-weight:600;
  color:var(--text);
  cursor:pointer;
  text-align:left;
  font-family:inherit;
}

.faq-icon{
  width:20px;
  height:20px;
  flex-shrink:0;
  color:var(--primary);
  transition:transform .3s;
}

.faq-item.open .faq-icon{transform:rotate(45deg)}

.faq-answer{
  max-height:0;
  overflow:hidden;
  transition:max-height .35s ease;
}

.faq-item.open .faq-answer{max-height:240px}

.faq-answer p{
  padding:0 24px 22px;
  font-size:14px;
  color:var(--text-sub);
}

/* ===== 下载区域 ===== */
.section-download{
  background:linear-gradient(135deg,var(--primary),var(--primary-deep));
  padding:96px 0;
}

.download-box{text-align:center}

.download-box h1{
  font-size:38px;
  font-weight:800;
  color:#fff;
  margin-bottom:18px;
}

.download-version{
  display:inline-block;
  font-size:18px;
  font-weight:700;
  background:rgba(255,255,255,.18);
  border:1px solid rgba(255,255,255,.4);
  border-radius:999px;
  padding:4px 14px;
  margin-left:6px;
  vertical-align:middle;
}

.download-meta{
  color:rgba(255,255,255,.92);
  font-size:14px;
  margin-bottom:34px;
}

.download-btns{
  display:flex;
  justify-content:center;
  gap:18px;
  margin-bottom:28px;
}

.download-tip{
  color:rgba(255,255,255,.95);
  font-size:15px;
}

/* ===== 页脚 ===== */
.footer{
  background:var(--dark);
  padding:36px 0;
}

.footer-inner{
  display:flex;
  align-items:center;
  justify-content:center;
  color:rgba(255,255,255,.75);
  font-size:14px;
}

.footer a{
  color:#fff;
  font-weight:600;
}

/* ===== 返回顶部 ===== */
.back-top{
  position:fixed;
  right:26px;
  bottom:30px;
  z-index:99;
  width:46px;
  height:46px;
  border-radius:50%;
  background:var(--primary);
  color:#fff;
  display:flex;
  align-items:center;
  justify-content:center;
  box-shadow:var(--shadow-hover);
  opacity:0;
  visibility:hidden;
  transform:translateY(14px);
  transition:opacity .3s,transform .3s,visibility .3s,background .25s;
}

.back-top svg{width:20px;height:20px}

.back-top:hover{background:var(--primary-deep)}

.back-top.show{
  opacity:1;
  visibility:visible;
  transform:translateY(0);
}

/* ===== 平板适配 ===== */
@media (max-width:1023px){
  .nav{gap:14px}

  .nav a{font-size:13px}

  .works-grid{grid-template-columns:repeat(2,1fr)}

  .compare-row{
    grid-template-columns:110px 1fr 1fr;
    gap:12px;
    padding:15px 22px;
  }

  .compare-head{padding:13px 22px}

  .features-grid{grid-template-columns:repeat(2,1fr)}

  .data-grid{grid-template-columns:repeat(2,1fr)}

  .reviews-grid{grid-template-columns:repeat(2,1fr)}

  .hero{padding:56px 0 68px}

  .hero h1{font-size:36px}

  .section{padding:68px 0}
}

/* ===== 移动端适配 ===== */
@media (max-width:767px){
  .container{padding:0 20px}

  .nav{display:none}

  .btn-nav{padding:8px 16px}

  .hero-inner{flex-direction:column;gap:36px}

  .hero-text{text-align:center}

  .hero-desc{margin-left:auto;margin-right:auto}

  .hero-btns{flex-direction:column;width:100%}

  .hero-btns .btn{width:100%;padding:15px 20px}

  .hero-img{width:100%}

  .hero-img img{margin:0 auto;max-width:340px}

  .hero h1{font-size:30px}

  .hero-version{font-size:15px;padding:3px 12px}

  .section{padding:56px 0}

  .section-title{font-size:26px}

  .about-cards{grid-template-columns:1fr}

  .features-grid{grid-template-columns:1fr}

  .works-grid{grid-template-columns:1fr}

  .data-grid{grid-template-columns:repeat(2,1fr);gap:14px}

  .data-item{padding:26px 12px}

  .data-num{font-size:32px}

  .reviews-grid{grid-template-columns:1fr}

  .compare-row{
    grid-template-columns:64px 1fr 1fr;
    gap:10px;
    padding:15px 16px;
  }

  .compare-head{padding:12px 16px}

  .compare-dim{font-size:13px}

  .compare-good,.compare-bad{font-size:13px;gap:6px}

  .compare-head .compare-good,
  .compare-head .compare-bad{font-size:14px}

  .dot{width:7px;height:7px}

  .update{padding:26px 20px}

  .update-head{flex-direction:column;align-items:flex-start}

  .download-box h1{font-size:27px}

  .download-meta{
    font-size:12px;
    white-space:nowrap;
  }

  .download-btns{flex-direction:column;gap:14px}

  .download-btns .btn{width:100%}

  .download-tip{font-size:14px}

  .back-top{right:16px;bottom:20px;width:42px;height:42px}
}