:root{
  --green:#0f9d76;
  --green-dark:#0b7d5e;
  --green-soft:#e8f7f2;
  --ink:#111418;
  --ink-2:#3d444d;
  --ink-3:#6b7480;
  --line:#e6e9ec;
  --bg:#ffffff;
  --bg-soft:#f6f8f9;
  --bg-mint:#f1faf6;
  --radius:14px;
  --shadow:0 1px 2px rgba(17,20,24,.04),0 8px 24px rgba(17,20,24,.06);
}
*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
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;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{display:block;max-width:100%;}
a{color:inherit;text-decoration:none;}
.wrap{width:100%;max-width:1160px;margin:0 auto;padding:0 20px;}
section{padding:72px 0;}
h1,h2,h3{line-height:1.3;letter-spacing:-.01em;color:var(--ink);}
h1{font-size:clamp(30px,5vw,52px);font-weight:800;}
h2{font-size:clamp(24px,3.4vw,36px);font-weight:800;}
h3{font-size:18px;font-weight:700;}
p{color:var(--ink-2);}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;color:var(--green-dark);
  background:var(--green-soft);border-radius:999px;padding:6px 14px;margin-bottom:18px;
}
.eyebrow::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--green);}
.lead{font-size:17px;color:var(--ink-3);max-width:620px;}

/* 顶部导航 */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.nav-inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;height:66px;
}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;letter-spacing:-.02em;flex-shrink:0;}
.brand img{height:34px;width:auto;border-radius:8px;}
.nav-links{display:flex;align-items:center;gap:4px;overflow-x:auto;scrollbar-width:none;}
.nav-links::-webkit-scrollbar{display:none;}
.nav-links a{
  font-size:14px;font-weight:600;color:var(--ink-2);
  padding:8px 12px;border-radius:8px;white-space:nowrap;transition:.2s;
}
.nav-links a:hover{color:var(--green-dark);background:var(--green-soft);}
.nav-cta{
  flex-shrink:0;background:var(--green);color:#fff;font-weight:700;font-size:14px;
  padding:10px 18px;border-radius:10px;transition:.2s;
}
.nav-cta:hover{background:var(--green-dark);}

/* 首屏 */
.hero{
  background:
    radial-gradient(1200px 400px at 85% -10%,#dff4ec 0%,rgba(255,255,255,0) 70%),
    linear-gradient(180deg,#fbfdfc 0%,#fff 100%);
  border-bottom:1px solid var(--line);
  padding:64px 0 72px;
}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;}
.hero h1 span{color:var(--green);}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;}
.btn-primary{
  display:inline-flex;align-items:center;gap:10px;
  background:var(--green);color:#fff;font-weight:700;font-size:16px;
  padding:15px 26px;border-radius:12px;box-shadow:0 8px 20px rgba(15,157,118,.24);
  transition:.2s;border:none;cursor:pointer;
}
.btn-primary:hover{background:var(--green-dark);transform:translateY(-1px);}
.btn-ghost{
  display:inline-flex;align-items:center;gap:10px;
  background:#fff;color:var(--ink);font-weight:700;font-size:16px;
  padding:15px 26px;border-radius:12px;border:1px solid var(--line);transition:.2s;
}
.btn-ghost:hover{border-color:var(--green);color:var(--green-dark);}
.btn-icon{width:18px;height:18px;flex-shrink:0;}
.hero-facts{display:flex;flex-wrap:wrap;gap:26px;margin-top:38px;padding-top:26px;border-top:1px solid var(--line);}
.hero-facts div strong{display:block;font-size:20px;font-weight:800;color:var(--ink);}
.hero-facts div span{font-size:13px;color:var(--ink-3);}
.hero-stage{position:relative;display:flex;justify-content:center;}
.phone-frame{
  width:min(300px,100%);
  border-radius:34px;padding:12px;background:#111418;
  box-shadow:0 30px 60px rgba(17,20,24,.18);
}
.phone-frame img{width:100%;border-radius:24px;}
.hero-badge{
  position:absolute;right:-6px;bottom:26px;
  background:#fff;border:1px solid var(--line);border-radius:14px;
  box-shadow:var(--shadow);padding:12px 16px;font-size:13px;font-weight:700;color:var(--ink);
  display:flex;align-items:center;gap:8px;
}
.hero-badge i{width:9px;height:9px;border-radius:50%;background:var(--green);display:inline-block;}

/* 通用卡片 */
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;box-shadow:var(--shadow);transition:.25s;
}
.card:hover{border-color:#cfe9e0;transform:translateY(-3px);}
.card p{font-size:14.5px;}
.card h3{margin-bottom:8px;}
.num-tag{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:10px;background:var(--green-soft);
  color:var(--green-dark);font-weight:800;font-size:14px;margin-bottom:14px;
}

/* 核心功能 瀑布 */
.section-head{max-width:680px;margin-bottom:44px;}
.feature-masonry{
  display:grid;grid-template-columns:repeat(3,1fr);gap:20px;
}
.feature-masonry .card:nth-child(1){grid-row:span 1;}
.feature-masonry .card.tall{background:var(--bg-mint);border-color:#d6efe5;}

/* 界面展示 */
.section-soft{background:var(--bg-soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.shots-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.shot{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow);transition:.25s;
}
.shot:hover{transform:translateY(-4px);}
.shot img{width:100%;aspect-ratio:9/16;object-fit:cover;object-position:top;}
.shot-cap{padding:14px 16px;border-top:1px solid var(--line);}
.shot-cap strong{display:block;font-size:14.5px;color:var(--ink);}
.shot-cap span{font-size:13px;color:var(--ink-3);}

/* Z 字深度内容 */
.z-row{
  display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;
  padding:34px 0;border-bottom:1px dashed var(--line);
}
.z-row:last-child{border-bottom:none;}
.z-row.reverse .z-text{order:2;}
.z-row.reverse .z-img{order:1;}
.z-text h3{font-size:22px;margin-bottom:12px;}
.z-text p{font-size:15px;}
.z-list{list-style:none;margin-top:16px;display:grid;gap:10px;}
.z-list li{
  position:relative;padding-left:24px;font-size:14.5px;color:var(--ink-2);
}
.z-list li::before{
  content:"";position:absolute;left:0;top:9px;width:8px;height:8px;
  border-radius:2px;background:var(--green);transform:rotate(45deg);
}
.z-img{border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow);background:#fff;}
.z-img img{width:100%;aspect-ratio:9/16;object-fit:cover;object-position:top;}

/* 使用反馈 */
.feedback-wrap{display:grid;grid-template-columns:1fr 1fr;gap:22px;}
.review{display:flex;gap:14px;align-items:flex-start;}
.review img.avatar{
  width:44px;height:44px;border-radius:50%;object-fit:cover;flex-shrink:0;
  border:1px solid var(--line);background:var(--green-soft);
}
.review-body strong{display:block;font-size:14.5px;color:var(--ink);}
.review-body span{font-size:12.5px;color:var(--ink-3);}
.review-body p{font-size:14.5px;margin-top:6px;}

/* 隐私安全 阶梯 */
.steps{display:grid;gap:14px;}
.step{
  display:grid;grid-template-columns:56px 1fr;gap:18px;align-items:center;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:18px 22px;box-shadow:var(--shadow);
}
.step:nth-child(2){margin-left:26px;}
.step:nth-child(3){margin-left:52px;}
.step:nth-child(4){margin-left:78px;}
.step-num{font-size:24px;font-weight:800;color:var(--green);text-align:center;}
.step p{font-size:14.5px;}
.step strong{display:block;font-size:15.5px;color:var(--ink);}

/* FAQ */
.faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;}
.faq{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;}
.faq h3{font-size:16px;display:flex;gap:10px;align-items:flex-start;margin-bottom:8px;}
.faq h3 em{
  font-style:normal;flex-shrink:0;width:24px;height:24px;border-radius:7px;
  background:var(--green);color:#fff;font-size:13px;font-weight:800;
  display:inline-flex;align-items:center;justify-content:center;
}
.faq p{font-size:14.5px;}

/* 下载区 */
.download{
  background:linear-gradient(180deg,#f1faf6 0%,#ffffff 100%);
  border-top:1px solid var(--line);
}
.dl-panel{
  background:#fff;border:1px solid #d6efe5;border-radius:22px;
  box-shadow:0 24px 60px rgba(15,157,118,.10);
  padding:44px;
  display:grid;grid-template-columns:1.3fr .7fr;gap:44px;align-items:center;
}
.dl-steps{counter-reset:ds;display:grid;gap:12px;margin:24px 0 28px;}
.dl-steps li{
  list-style:none;position:relative;padding-left:36px;font-size:15px;color:var(--ink-2);
}
.dl-steps li::before{
  counter-increment:ds;content:counter(ds);
  position:absolute;left:0;top:1px;width:24px;height:24px;border-radius:50%;
  background:var(--green-soft);color:var(--green-dark);font-weight:800;font-size:13px;
  display:flex;align-items:center;justify-content:center;
}
.dl-actions{display:flex;flex-wrap:wrap;gap:14px;}
.qr-side{text-align:center;}
.qr-side img{
  width:100%;max-width:200px;margin:0 auto;border-radius:12px;border:1px solid var(--line);
}
.qr-side p{font-size:13.5px;color:var(--ink-3);margin-top:12px;}

/* 页脚 */
.site-footer{background:#f6f8f9;border-top:1px solid var(--line);padding:56px 0 32px;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:40px;}
.footer-brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;margin-bottom:14px;}
.footer-brand img{height:30px;width:auto;border-radius:7px;}
.footer-grid p{font-size:14px;}
.footer-col h3{font-size:14px;margin-bottom:14px;color:var(--ink);}
.footer-col ul{list-style:none;display:grid;gap:9px;}
.footer-col li,.footer-col a{font-size:14px;color:var(--ink-3);}
.footer-col a:hover{color:var(--green-dark);}
.footer-bottom{
  margin-top:40px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  font-size:13px;color:var(--ink-3);
}

/* 复制弹窗 */
.copy-mask{
  position:fixed;inset:0;background:rgba(17,20,24,.5);z-index:200;
  display:none;align-items:center;justify-content:center;padding:20px;
}
.copy-mask.on{display:flex;}
.copy-box{
  background:#fff;border-radius:16px;padding:26px;max-width:420px;width:100%;
  box-shadow:0 24px 60px rgba(0,0,0,.2);
}
.copy-box p{font-size:14.5px;margin-bottom:14px;}
.copy-url{
  background:var(--bg-soft);border:1px solid var(--line);border-radius:10px;
  padding:12px;font-size:13px;color:var(--ink-2);word-break:break-all;margin-bottom:16px;
}
.copy-actions{display:flex;gap:10px;}
.copy-actions button{
  flex:1;padding:12px;border-radius:10px;font-size:15px;font-weight:700;cursor:pointer;border:1px solid var(--line);
  background:#fff;color:var(--ink);transition:.2s;
}
.copy-actions .do-copy{background:var(--green);color:#fff;border-color:var(--green);}
.copy-actions .do-copy:hover{background:var(--green-dark);}

/* 响应式 */
@media (max-width:1024px){
  .hero-grid{gap:36px;}
  .feature-masonry{grid-template-columns:repeat(2,1fr);}
  .shots-grid{grid-template-columns:repeat(2,1fr);}
  .dl-panel{padding:34px;gap:30px;}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:768px){
  section{padding:52px 0;}
  .hero{padding:44px 0 52px;}
  .hero-grid{grid-template-columns:1fr;gap:34px;}
  .hero-stage{order:-1;}
  .phone-frame{width:min(250px,80%);}
  .hero-badge{right:0;bottom:0;}
  .feature-masonry{grid-template-columns:1fr;}
  .shots-grid{grid-template-columns:1fr 1fr;gap:14px;}
  .shot img{aspect-ratio:3/4;}
  .z-row{grid-template-columns:1fr;gap:22px;padding:26px 0;}
  .z-row.reverse .z-text{order:1;}
  .z-row.reverse .z-img{order:2;}
  .z-img img{aspect-ratio:4/3;object-position:top;}
  .feedback-wrap{grid-template-columns:1fr;}
  .faq-grid{grid-template-columns:1fr;}
  .step,.step:nth-child(2),.step:nth-child(3),.step:nth-child(4){margin-left:0;}
  .dl-panel{grid-template-columns:1fr;padding:26px;gap:30px;}
  .qr-side{order:-1;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .nav-links{max-width:100%;}
  .site-header .nav-cta{display:none;}
  .hero-actions .btn-primary,.hero-actions .btn-ghost{flex:1;justify-content:center;}
}