:root{
  --bg:#f4f8fc;
  --bg-soft:#eef4fa;
  --card:#ffffff;
  --ink:#13222f;
  --muted:#5b6b7d;
  --line:#e2ebf3;
  --blue:#229ed9;
  --blue-deep:#1a86bd;
  --cyan:#37b6f0;
  --accent-grad:linear-gradient(135deg,#37b6f0,#1a86bd);
  --shadow:0 6px 24px rgba(28,74,118,0.08);
  --shadow-lg:0 14px 40px rgba(28,74,118,0.14);
  --radius:16px;
}
*{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",sans-serif;
  background:var(--bg);
  color:var(--ink);
  line-height:1.75;
  overflow-x:hidden;
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;inset:0;z-index:-1;
  background:
    radial-gradient(760px 420px at 8% -4%,rgba(34,158,217,0.10),transparent 62%),
    radial-gradient(720px 460px at 96% 4%,rgba(55,182,240,0.12),transparent 60%),
    radial-gradient(820px 520px at 50% 108%,rgba(26,134,189,0.08),transparent 60%);
}
a{color:inherit;text-decoration:none;}
img{max-width:100%;display:block;}
button{font-family:inherit;}

.wrap{max-width:1140px;margin:0 auto;padding:0 22px;}

/* 顶部导航 */
.topbar{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,0.86);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;justify-content:space-between;height:66px;gap:18px;}
.logo{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:700;color:var(--ink);}
.logo-icon{
  width:36px;height:36px;border-radius:11px;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  background:var(--accent-grad);color:#fff;font-size:19px;
  box-shadow:0 6px 16px rgba(34,158,217,0.35);
}
.logo-text{letter-spacing:.5px;}
.logo-text b{color:var(--blue);}
.nav-links{display:flex;align-items:center;gap:26px;font-size:15px;color:var(--muted);}
.nav-links a{transition:color .2s;}
.nav-links a:hover{color:var(--blue);}
.nav-cta{
  padding:9px 20px;border-radius:24px;font-weight:600;font-size:14px;color:#fff;
  background:var(--accent-grad);box-shadow:0 6px 16px rgba(34,158,217,0.32);
  transition:transform .2s,box-shadow .2s;
}
.nav-cta:hover{transform:translateY(-1px);box-shadow:0 10px 22px rgba(34,158,217,0.42);}
.menu-btn{display:none;background:none;border:none;color:var(--ink);font-size:26px;cursor:pointer;line-height:1;}

/* 首屏 */
.hero{
  padding:76px 0 64px;text-align:center;position:relative;
}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;padding:7px 18px;border-radius:22px;
  font-size:13px;color:var(--blue-deep);background:#e7f4fc;border:1px solid #cde9f7;
  margin-bottom:24px;font-weight:600;
}
.hero h1{font-size:46px;line-height:1.22;font-weight:800;letter-spacing:.5px;}
.grad{background:var(--accent-grad);-webkit-background-clip:text;background-clip:text;color:transparent;}
.hero-sub{max-width:760px;margin:22px auto 0;color:var(--muted);font-size:17px;}
.hero-tags{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin:28px 0 36px;}
.hero-tags span{
  padding:8px 16px;border-radius:20px;font-size:14px;color:var(--blue-deep);
  background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);
}
.btn-row{display:flex;flex-wrap:wrap;justify-content:center;gap:16px;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 36px;border-radius:28px;font-size:16px;font-weight:700;color:#fff;
  background:var(--accent-grad);box-shadow:0 10px 24px rgba(34,158,217,0.36);
  transition:transform .2s,box-shadow .2s;cursor:pointer;border:none;
}
.btn:hover{transform:translateY(-2px);box-shadow:0 16px 32px rgba(34,158,217,0.46);}
.btn.ghost{
  background:#fff;border:1px solid var(--line);color:var(--ink);box-shadow:var(--shadow);
}
.btn.ghost:hover{box-shadow:var(--shadow-lg);}
.btn.small{padding:10px 22px;font-size:14px;border-radius:22px;}

/* 区块通用 */
.section{padding:66px 0;}
.section-head{text-align:center;margin-bottom:40px;}
.section-head h2{font-size:32px;font-weight:800;letter-spacing:.3px;}
.section-head p{color:var(--muted);margin-top:10px;font-size:15px;}

/* 商品分类卡片 */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:28px 24px;box-shadow:var(--shadow);position:relative;
  transition:transform .25s,box-shadow .25s;
}
.card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);}
.feature-icon{
  width:54px;height:54px;border-radius:14px;margin-bottom:18px;
  display:flex;align-items:center;justify-content:center;font-size:27px;
  background:linear-gradient(135deg,#e7f4fc,#eef7fd);border:1px solid #cde9f7;
}
.card h3{font-size:19px;margin-bottom:9px;color:var(--ink);}
.card p{color:var(--muted);font-size:15px;}
.card .tag{
  display:inline-block;margin-top:14px;padding:5px 13px;border-radius:14px;
  font-size:12px;font-weight:600;color:var(--blue-deep);background:#e7f4fc;
}

/* 卖点 */
.points{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.point{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:28px 22px;text-align:center;box-shadow:var(--shadow);
}
.point .num{
  display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:50%;margin-bottom:16px;
  background:var(--accent-grad);color:#fff;font-size:17px;font-weight:700;
  box-shadow:0 6px 14px rgba(34,158,217,0.3);
}
.point h3{font-size:17px;margin-bottom:8px;}
.point p{color:var(--muted);font-size:14px;}

/* 购买流程步骤 */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;counter-reset:step;}
.step{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:30px 26px;box-shadow:var(--shadow);position:relative;
}
.step .s-num{
  display:inline-flex;align-items:center;justify-content:center;
  width:46px;height:46px;border-radius:13px;margin-bottom:18px;
  background:linear-gradient(135deg,#37b6f0,#1a86bd);color:#fff;
  font-size:20px;font-weight:800;
}
.step h3{font-size:18px;margin-bottom:8px;}
.step p{color:var(--muted);font-size:15px;}

/* 文章 */
.articles{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;}
.article{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:28px;box-shadow:var(--shadow);
}
.article .meta{
  display:inline-block;padding:4px 12px;border-radius:12px;font-size:12px;font-weight:600;
  color:var(--blue-deep);background:#e7f4fc;margin-bottom:14px;
}
.article h3{font-size:20px;margin-bottom:12px;line-height:1.5;}
.article p{color:var(--muted);font-size:15px;margin-bottom:10px;}

/* FAQ */
.faq{max-width:820px;margin:0 auto;}
.faq details{
  background:var(--card);border:1px solid var(--line);border-radius:14px;
  margin-bottom:14px;padding:4px 22px;box-shadow:var(--shadow);
}
.faq summary{cursor:pointer;padding:16px 0;font-size:16px;font-weight:600;list-style:none;}
.faq summary::-webkit-details-marker{display:none;}
.faq details p{padding:0 0 18px;color:var(--muted);font-size:15px;}

/* 退款区块 */
.refund{
  margin:60px 0 0;border:1px solid #ffe0c2;border-radius:20px;
  padding:46px 34px;text-align:center;
  background:linear-gradient(135deg,#fff7ee,#eef7fd);
  box-shadow:var(--shadow);position:relative;overflow:hidden;
}
.refund h2{font-size:28px;font-weight:800;margin-bottom:12px;}
.refund p{color:var(--muted);margin-bottom:24px;max-width:640px;margin-left:auto;margin-right:auto;}
.refund .btn{
  background:linear-gradient(135deg,#f59e0b,#f97316);
  box-shadow:0 10px 22px rgba(245,158,11,0.34);
}

/* 热门搜索关键词 */
.keyword-links{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;max-width:920px;margin:0 auto;}
.keyword-links a{
  padding:10px 18px;border-radius:24px;font-size:14px;color:var(--muted);
  background:var(--card);border:1px solid var(--line);box-shadow:var(--shadow);
  transition:color .2s,border-color .2s,transform .2s;
}
.keyword-links a:hover{color:var(--blue);border-color:#a8d6ef;transform:translateY(-2px);}

/* 页脚 */
.footer{border-top:1px solid var(--line);padding:38px 0;margin-top:30px;background:var(--bg-soft);}
.footer-inner{display:flex;flex-wrap:wrap;justify-content:space-between;gap:20px;color:var(--muted);font-size:14px;}
.footer-links{display:flex;gap:22px;}
.footer-links a:hover{color:var(--blue);}
.disclaimer{margin-top:16px;font-size:12px;color:#93a3b5;}

/* 移动端底部悬浮购买栏 */
.mobile-cta{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:60;
  padding:12px 16px calc(12px + env(safe-area-inset-bottom));
  background:rgba(255,255,255,0.94);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  border-top:1px solid var(--line);box-shadow:0 -8px 24px rgba(28,74,118,0.10);
}
.mobile-cta .btn{width:100%;padding:15px 0;font-size:16px;}
body:has(.mobile-cta){padding-bottom:84px;}

/* 跳转页样式 */
.jump-wrap{
  min-height:100vh;display:flex;align-items:center;justify-content:center;
  text-align:center;padding:24px;
}
.jump-card{
  background:var(--card);border:1px solid var(--line);border-radius:22px;
  padding:52px 40px;box-shadow:var(--shadow-lg);max-width:440px;width:100%;
}
.spinner{
  width:52px;height:52px;border-radius:50%;margin:0 auto 26px;
  border:4px solid #e2ebf3;border-top-color:var(--blue);
  animation:spin .9s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg);}}
.jump-card h1{font-size:22px;margin-bottom:12px;}
.jump-card p{color:var(--muted);font-size:15px;margin-bottom:28px;}
.jump-card .btn{width:100%;}

/* 退款页表单 */
.form-wrap{max-width:560px;margin:0 auto;}
.form-card{
  background:var(--card);border:1px solid var(--line);border-radius:18px;
  padding:32px 28px;box-shadow:var(--shadow);
}
.form-note{
  background:#fff7ee;border:1px solid #ffe0c2;border-radius:12px;
  padding:14px 18px;margin-bottom:22px;color:var(--ink);font-size:14px;
}
.field{margin-bottom:18px;}
.field label{display:block;font-size:14px;color:var(--muted);margin-bottom:8px;}
.field input,.field textarea{
  width:100%;padding:12px 14px;border-radius:10px;font-size:15px;color:var(--ink);
  background:#f7fafc;border:1px solid var(--line);outline:none;
  transition:border-color .2s;
}
.field input:focus,.field textarea:focus{border-color:var(--blue);background:#fff;}
.field textarea{resize:vertical;min-height:110px;}
.form-tip{
  display:none;margin-top:16px;padding:12px 16px;border-radius:10px;font-size:14px;color:#15803d;
  background:#eafaf1;border:1px solid #b7e7c9;
}

/* 响应式 */
@media(max-width:900px){
  .grid,.articles{grid-template-columns:1fr 1fr;}
  .points{grid-template-columns:1fr 1fr;}
  .steps{grid-template-columns:1fr;}
  .hero h1{font-size:36px;}
}
@media(max-width:640px){
  .nav-links{display:none;}
  .menu-btn{display:block;}
  .nav-links.open{display:flex;flex-direction:column;position:absolute;top:66px;left:0;right:0;
    background:#fff;padding:16px 22px;gap:14px;border-bottom:1px solid var(--line);box-shadow:var(--shadow);}
  .nav-cta{display:none;}
  .grid,.articles,.points{grid-template-columns:1fr;}
  .hero{padding:52px 0 44px;}
  .hero h1{font-size:29px;}
  .section{padding:46px 0;}
  .section-head h2{font-size:26px;}
  .refund h2{font-size:23px;}
  .mobile-cta{display:block;}
  .jump-card{padding:40px 26px;}
}
html:not(.ysht) body {
    filter: blur(10px);
    -webkit-filter: blur(10px);
}
body {
    transition: filter 0.5s ease, opacity 0.5s ease;
}