:root{
  --blue:#2b7fff;
  --blue-deep:#1660d8;
  --blue-soft:#eaf2ff;
  --ink:#101418;
  --ink-2:#3a424c;
  --ink-3:#6b7480;
  --line:#e4e9f0;
  --bg:#ffffff;
  --bg-soft:#f5f8fc;
  --grid:rgba(43,127,255,.055);
  --radius:14px;
  --shadow:0 2px 10px rgba(16,32,64,.06);
  --shadow-hover:0 8px 26px rgba(16,32,64,.10);
}
*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.7;
  overflow-x:hidden;
  font-size:16px;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
ul{list-style:none;}
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 24px;}
.section{padding:84px 0;position:relative;}
.section--soft{
  background:var(--bg-soft);
  background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);
  background-size:34px 34px;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.06em;
  color:var(--blue);background:var(--blue-soft);
  padding:6px 14px;border-radius:999px;margin-bottom:18px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--blue);}
h1,h2,h3{line-height:1.28;letter-spacing:-.01em;}
h2{font-size:36px;font-weight:800;color:var(--ink);}
h3{font-size:19px;font-weight:700;}
.section-head{max-width:720px;margin-bottom:44px;}
.section-head p{color:var(--ink-2);margin-top:14px;font-size:16px;}
.lead{color:var(--ink-2);}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.92);
  backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  height:68px;gap:20px;
}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand img{height:34px;width:auto;border-radius:8px;}
.brand-name{font-size:19px;font-weight:800;letter-spacing:-.01em;white-space:nowrap;}
.nav{display:flex;align-items:center;gap:2px;flex-wrap:wrap;}
.nav a{
  font-size:14px;color:var(--ink-2);font-weight:500;
  padding:8px 11px;border-radius:8px;transition:color .2s,background .2s;white-space:nowrap;
}
.nav a:hover{color:var(--blue);background:var(--blue-soft);}
.header-cta{
  display:inline-flex;align-items:center;gap:6px;flex-shrink:0;
  background:var(--blue);color:#fff;font-size:14px;font-weight:600;
  padding:10px 18px;border-radius:10px;transition:background .2s,transform .2s;
}
.header-cta:hover{background:var(--blue-deep);transform:translateY(-1px);}
.nav-toggle{
  display:none;width:40px;height:40px;border:1px solid var(--line);
  background:#fff;border-radius:9px;cursor:pointer;align-items:center;justify-content:center;flex-direction:column;gap:4px;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;}

/* ---------- hero ---------- */
.hero{
  background:var(--bg-soft);
  background-image:
    linear-gradient(var(--grid) 1px,transparent 1px),
    linear-gradient(90deg,var(--grid) 1px,transparent 1px);
  background-size:38px 38px;
  padding:70px 0 84px;
  overflow:hidden;
}
.hero-grid{
  display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;
}
.hero h1{
  font-size:52px;font-weight:900;letter-spacing:-.025em;line-height:1.12;
}
.hero h1 em{font-style:normal;color:var(--blue);}
.hero-sub{margin-top:22px;font-size:17px;color:var(--ink-2);max-width:520px;}
.hero-points{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px 22px;margin-top:30px;max-width:540px;}
.hero-points li{display:flex;align-items:flex-start;gap:9px;font-size:14.5px;color:var(--ink-2);font-weight:500;}
.tick{
  flex-shrink:0;width:18px;height:18px;border-radius:50%;
  background:var(--blue-soft);border:1px solid #c9ddff;position:relative;margin-top:3px;
}
.tick::after{
  content:"";position:absolute;left:5px;top:2px;width:6px;height:10px;
  border-right:2px solid var(--blue);border-bottom:2px solid var(--blue);transform:rotate(42deg);
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:36px;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  font-size:15.5px;font-weight:700;padding:15px 28px;border-radius:12px;
  border:1px solid transparent;cursor:pointer;transition:transform .2s,background .2s,box-shadow .2s,border-color .2s;
}
.btn-primary{background:var(--blue);color:#fff;box-shadow:0 6px 18px rgba(43,127,255,.28);}
.btn-primary:hover{background:var(--blue-deep);transform:translateY(-2px);box-shadow:0 10px 24px rgba(43,127,255,.34);}
.btn-ghost{background:#fff;color:var(--ink);border-color:var(--line);box-shadow:var(--shadow);}
.btn-ghost:hover{border-color:#bfd3f6;color:var(--blue);transform:translateY(-2px);}
.btn svg{width:18px;height:18px;flex-shrink:0;}
.hero-note{margin-top:16px;font-size:13px;color:var(--ink-3);}

/* hero visual: fan carousel */
.hero-visual{position:relative;height:520px;}
.fan{
  position:absolute;left:50%;top:50%;
  width:196px;height:290px;margin:-145px 0 0 -98px;
  border-radius:16px;overflow:hidden;background:#dfe7f2;
  box-shadow:0 14px 34px rgba(16,32,64,.16);
  border:3px solid #fff;
  transition:transform .55s cubic-bezier(.22,.7,.3,1),opacity .5s;
  will-change:transform;
}
.fan img{width:100%;height:100%;object-fit:cover;}
.fan-1{transform:translateX(-150px) rotate(-10deg) scale(.88);z-index:1;opacity:.85;}
.fan-2{transform:translateX(-76px) rotate(-5deg) scale(.95);z-index:2;}
.fan-3{transform:translateX(0) translateY(-12px) scale(1.04);z-index:4;}
.fan-4{transform:translateX(76px) rotate(5deg) scale(.95);z-index:3;}
.fan-5{transform:translateX(150px) rotate(10deg) scale(.88);z-index:1;opacity:.85;}
.hero-badges{
  position:absolute;bottom:6px;left:50%;transform:translateX(-50%);
  display:flex;gap:10px;background:#fff;padding:10px 16px;border-radius:999px;
  border:1px solid var(--line);box-shadow:var(--shadow);white-space:nowrap;z-index:6;
}
.hero-badges span{font-size:12.5px;font-weight:600;color:var(--ink-2);display:inline-flex;align-items:center;gap:6px;}
.hero-badges i{width:6px;height:6px;border-radius:50%;background:var(--blue);display:inline-block;}

/* ---------- intro / what it is ---------- */
.intro-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;}
.feature-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:28px 24px;box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s,border-color .25s;
  display:flex;flex-direction:column;
}
.feature-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:#cbdcf8;}
.feature-icon{
  width:44px;height:44px;border-radius:12px;background:var(--blue-soft);
  display:flex;align-items:center;justify-content:center;color:var(--blue);margin-bottom:18px;
}
.feature-icon svg{width:22px;height:22px;}
.feature-card p{font-size:14.5px;color:var(--ink-2);margin-top:10px;}
.feature-card .tag{margin-top:auto;padding-top:16px;font-size:12.5px;color:var(--blue);font-weight:600;letter-spacing:.02em;}

/* ---------- features Z ---------- */
.z-row{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;margin-bottom:64px;}
.z-row:last-child{margin-bottom:0;}
.z-row.reverse .z-media{order:2;}
.z-media{
  border-radius:18px;overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--shadow);background:#eef3fa;position:relative;
  aspect-ratio:4/3;
}
.z-media img{width:100%;height:100%;object-fit:cover;}
.z-body h3{font-size:26px;font-weight:800;margin-bottom:14px;}
.z-body>p{color:var(--ink-2);font-size:15.5px;margin-bottom:20px;}
.z-list{display:grid;gap:12px;}
.z-list li{display:flex;gap:10px;font-size:14.5px;color:var(--ink-2);}
.z-list li strong{color:var(--ink);font-weight:700;}
.z-num{
  flex-shrink:0;width:22px;height:22px;border-radius:7px;background:var(--blue);color:#fff;
  font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center;margin-top:3px;
}

/* ---------- tags ---------- */
.tag-cloud{display:flex;flex-wrap:wrap;gap:12px;max-width:960px;}
.tag-chip{
  display:inline-flex;align-items:center;gap:8px;
  background:#fff;border:1px solid var(--line);border-radius:999px;
  padding:11px 20px;font-size:14.5px;font-weight:600;color:var(--ink-2);
  box-shadow:var(--shadow);transition:all .22s;cursor:default;
}
.tag-chip:hover{color:var(--blue);border-color:#bfd3f6;transform:translateY(-2px);}
.tag-chip span{font-size:12px;color:var(--blue);background:var(--blue-soft);border-radius:6px;padding:1px 7px;font-weight:700;}

/* ---------- ranking / stairs ---------- */
.rank-layout{display:grid;grid-template-columns:1fr 300px;gap:28px;align-items:start;}
.rank-stairs{display:flex;flex-direction:column;gap:14px;}
.rank-item{
  display:flex;align-items:center;gap:18px;background:#fff;
  border:1px solid var(--line);border-radius:var(--radius);
  padding:18px 22px;box-shadow:var(--shadow);transition:transform .22s,box-shadow .22s,border-color .22s;
}
.rank-item:hover{transform:translateX(5px);box-shadow:var(--shadow-hover);border-color:#cbdcf8;}
.rank-item:nth-child(2){margin-left:22px;}
.rank-item:nth-child(3){margin-left:44px;}
.rank-item:nth-child(4){margin-left:66px;}
.rank-item:nth-child(5){margin-left:88px;}
.rank-item:nth-child(6){margin-left:110px;}
.rank-no{
  font-size:26px;font-weight:900;color:#c9d6e8;font-style:italic;line-height:1;flex-shrink:0;width:38px;
}
.rank-item:nth-child(1) .rank-no{color:var(--blue);}
.rank-item:nth-child(2) .rank-no{color:#4d92ff;}
.rank-item:nth-child(3) .rank-no{color:#79abff;}
.rank-cover{width:54px;height:74px;border-radius:8px;overflow:hidden;background:#e7eef8;flex-shrink:0;}
.rank-cover img{width:100%;height:100%;object-fit:cover;}
.rank-info h3{font-size:16px;font-weight:700;margin-bottom:4px;}
.rank-info p{font-size:13px;color:var(--ink-3);}
.rank-heat{margin-left:auto;text-align:right;flex-shrink:0;}
.rank-heat b{font-size:15px;color:var(--blue);font-weight:800;display:block;}
.rank-heat small{font-size:12px;color:var(--ink-3);}
.rank-side{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;box-shadow:var(--shadow);
}
.rank-side h3{font-size:16px;margin-bottom:6px;}
.rank-side>p{font-size:13.5px;color:var(--ink-3);margin-bottom:16px;}
.rank-side ul{display:grid;gap:12px;}
.rank-side li{font-size:14px;color:var(--ink-2);display:flex;gap:9px;align-items:flex-start;}
.rank-side li::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--blue);flex-shrink:0;margin-top:8px;}

/* ---------- screenshots ---------- */
.shots-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:20px;}
.shot{
  border-radius:18px;overflow:hidden;border:1px solid var(--line);
  background:#fff;box-shadow:var(--shadow);transition:transform .28s,box-shadow .28s;
  aspect-ratio:9/16;
}
.shot:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover);}
.shot img{width:100%;height:100%;object-fit:cover;}

/* ---------- reviews ---------- */
.review-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;}
.review-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:26px;box-shadow:var(--shadow);position:relative;
}
.review-card::before{
  content:"“";position:absolute;right:22px;top:8px;font-size:56px;line-height:1;
  color:var(--blue-soft);font-family:Georgia,serif;font-weight:700;
}
.review-user{display:flex;align-items:center;gap:12px;margin-bottom:14px;}
.review-avatar{width:42px;height:42px;border-radius:12px;overflow:hidden;background:var(--blue-soft);border:1px solid var(--line);flex-shrink:0;}
.review-avatar img{width:100%;height:100%;object-fit:cover;}
.review-user b{font-size:14.5px;display:block;}
.review-user small{font-size:12px;color:var(--ink-3);}
.review-card p{font-size:14.5px;color:var(--ink-2);position:relative;z-index:1;}

/* ---------- privacy ---------- */
.privacy-wrap{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;}
.privacy-item{
  display:flex;gap:16px;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);transition:border-color .22s,transform .22s;
}
.privacy-item:hover{border-color:#cbdcf8;transform:translateY(-3px);}
.privacy-item .feature-icon{margin-bottom:0;}
.privacy-item h3{font-size:16px;margin-bottom:6px;}
.privacy-item p{font-size:14px;color:var(--ink-2);}

/* ---------- faq ---------- */
.faq-list{display:grid;gap:14px;max-width:880px;margin:0 auto;}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);overflow:hidden;
}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 24px;background:none;border:0;cursor:pointer;
  font-size:16px;font-weight:700;color:var(--ink);text-align:left;font-family:inherit;line-height:1.5;
}
.faq-q .plus{
  flex-shrink:0;width:22px;height:22px;border-radius:50%;
  border:1px solid #c9ddff;color:var(--blue);display:flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:700;transition:transform .25s,background .25s;background:var(--blue-soft);
}
.faq-item.open .faq-q .plus{transform:rotate(45deg);background:var(--blue);color:#fff;}
.faq-a{padding:0 24px 22px;font-size:14.5px;color:var(--ink-2);display:none;}
.faq-item.open .faq-a{display:block;}

/* ---------- download ---------- */
.download{
  background:var(--bg-soft);
  background-image:
    linear-gradient(var(--grid) 1px,transparent 1px),
    linear-gradient(90deg,var(--grid) 1px,transparent 1px);
  background-size:34px 34px;
}
.dl-wrap{
  display:grid;grid-template-columns:1fr 300px;gap:48px;align-items:center;
  background:#fff;border:1px solid var(--line);border-radius:22px;
  padding:48px;box-shadow:0 14px 40px rgba(16,32,64,.08);
}
.dl-wrap h2{font-size:32px;}
.dl-wrap .lead{margin-top:14px;font-size:15.5px;}
.dl-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}
.dl-qr{
  text-align:center;border-left:1px solid var(--line);padding-left:40px;
}
.dl-qr img{
  width:176px;height:176px;margin:0 auto 14px;border:1px solid var(--line);
  border-radius:14px;padding:10px;background:#fff;
}
.dl-qr b{display:block;font-size:14.5px;margin-bottom:4px;}
.dl-qr small{font-size:12.5px;color:var(--ink-3);}
.steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin-top:64px;}
.step{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 24px;box-shadow:var(--shadow);position:relative;
}
.step-no{
  display:inline-flex;align-items:center;justify-content:center;
  width:32px;height:32px;border-radius:9px;background:var(--blue);color:#fff;
  font-size:14px;font-weight:800;margin-bottom:14px;
}
.step h3{font-size:16px;margin-bottom:8px;}
.step p{font-size:14px;color:var(--ink-2);}

/* ---------- copy dialog ---------- */
.copy-mask{
  position:fixed;inset:0;background:rgba(12,20,32,.5);z-index:200;
  display:none;align-items:center;justify-content:center;padding:20px;
}
.copy-mask.show{display:flex;}
.copy-box{
  background:#fff;border-radius:16px;max-width:400px;width:100%;
  padding:28px 24px;box-shadow:0 20px 50px rgba(0,0,0,.22);text-align:center;
}
.copy-box p.tip{font-size:15px;font-weight:700;color:var(--ink);line-height:1.6;margin-bottom:16px;}
.copy-link{
  display:block;word-break:break-all;font-size:13px;color:var(--blue);
  background:var(--blue-soft);border:1px dashed #bfd3f6;border-radius:10px;
  padding:12px;margin-bottom:16px;
}
.copy-box .btn{width:100%;padding:13px;}
.copy-close{
  margin-top:12px;background:none;border:0;color:var(--ink-3);font-size:13.5px;
  cursor:pointer;font-family:inherit;
}

/* ---------- footer ---------- */
.site-footer{border-top:1px solid var(--line);background:#fff;padding:56px 0 28px;}
.footer-top{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px;padding-bottom:36px;border-bottom:1px solid var(--line);}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand img{height:32px;width:auto;border-radius:8px;}
.footer-brand b{font-size:17px;font-weight:800;}
.footer-brand-desc{font-size:14px;color:var(--ink-3);max-width:340px;line-height:1.8;}
.footer-col h3{font-size:14px;font-weight:700;margin-bottom:16px;}
.footer-col ul{display:grid;gap:10px;}
.footer-col a{font-size:13.5px;color:var(--ink-3);transition:color .2s;}
.footer-col a:hover{color:var(--blue);}
.footer-bottom{
  padding-top:24px;display:flex;flex-wrap:wrap;gap:10px;
  justify-content:space-between;align-items:center;
  font-size:12.5px;color:var(--ink-3);
}
.footer-bottom time{color:var(--ink-3);}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .hero-grid{grid-template-columns:1fr;gap:52px;}
  .hero h1{font-size:44px;}
  .hero-visual{height:440px;}
  .fan{width:170px;height:252px;margin:-126px 0 0 -85px;}
  .intro-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .rank-layout{grid-template-columns:1fr;}
  .rank-side{order:-1;}
  .shots-grid{grid-template-columns:repeat(3,minmax(0,1fr));}
  .review-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .dl-wrap{grid-template-columns:1fr;gap:36px;padding:36px;}
  .dl-qr{border-left:0;border-top:1px solid var(--line);padding-left:0;padding-top:32px;}
  .footer-top{grid-template-columns:1fr 1fr;}
  .nav{display:none;position:absolute;top:68px;left:0;right:0;background:#fff;flex-direction:column;
    align-items:stretch;padding:12px 16px;border-bottom:1px solid var(--line);box-shadow:0 10px 24px rgba(16,32,64,.08);gap:2px;}
  .nav.open{display:flex;}
  .nav a{padding:11px 12px;}
  .nav-toggle{display:flex;}
  .header-cta{display:none;}
}
@media (max-width:768px){
  .container{padding:0 18px;}
  .section{padding:60px 0;}
  h2{font-size:27px;}
  .hero{padding:44px 0 64px;}
  .hero h1{font-size:34px;}
  .hero-sub{font-size:15.5px;}
  .hero-points{grid-template-columns:1fr;}
  .hero-visual{height:360px;}
  .fan{width:136px;height:202px;margin:-101px 0 0 -68px;}
  .fan-1{transform:translateX(-104px) rotate(-10deg) scale(.86);}
  .fan-2{transform:translateX(-54px) rotate(-5deg) scale(.94);}
  .fan-3{transform:translateX(0) translateY(-10px) scale(1.02);}
  .fan-4{transform:translateX(54px) rotate(5deg) scale(.94);}
  .fan-5{transform:translateX(104px) rotate(10deg) scale(.86);}
  .hero-badges{padding:8px 12px;gap:8px;}
  .hero-badges span{font-size:11.5px;}
  .intro-grid{grid-template-columns:1fr;}
  .z-row{grid-template-columns:1fr;gap:24px;margin-bottom:44px;}
  .z-row.reverse .z-media{order:0;}
  .z-body h3{font-size:21px;}
  .rank-item{padding:14px 16px;gap:12px;}
  .rank-item:nth-child(n){margin-left:0;}
  .rank-no{font-size:22px;width:30px;}
  .rank-cover{width:44px;height:62px;}
  .rank-heat b{font-size:13.5px;}
  .shots-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;}
  .review-grid{grid-template-columns:1fr;}
  .privacy-wrap{grid-template-columns:1fr;}
  .steps{grid-template-columns:1fr;margin-top:40px;}
  .dl-wrap{padding:26px 20px;border-radius:16px;}
  .dl-wrap h2{font-size:25px;}
  .dl-actions .btn{width:100%;}
  .footer-top{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
  .faq-q{font-size:15px;padding:17px 18px;}
  .faq-a{padding:0 18px 18px;}
}