:root{
  --green:#0f9d7a;
  --green-deep:#0b7d61;
  --green-soft:#e8f7f2;
  --ink:#111614;
  --ink-2:#3d4643;
  --ink-3:#6b7672;
  --line:#e6ecea;
  --bg:#ffffff;
  --bg-soft:#f6faf9;
  --radius:16px;
  --max:1160px;
}
*{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{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
.wrap{width:100%;max-width:var(--max);margin:0 auto;padding:0 24px;}
section{padding:84px 0;}
.section-head{max-width:720px;margin-bottom:44px;}
.eyebrow{
  display:inline-block;font-size:13px;font-weight:600;letter-spacing:.08em;
  color:var(--green-deep);background:var(--green-soft);
  padding:6px 14px;border-radius:999px;margin-bottom:18px;
}
h2{font-size:34px;line-height:1.3;font-weight:800;letter-spacing:-.01em;margin-bottom:16px;}
h3{font-size:19px;font-weight:700;margin-bottom:8px;}
.lead{color:var(--ink-2);font-size:16px;}
p{color:var(--ink-2);}

/* ---------- 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;height:66px;gap:20px;}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;letter-spacing:-.01em;}
.brand img{height:32px;width:auto;border-radius:8px;}
.nav-links{display:flex;align-items:center;gap:4px;flex-wrap:wrap;}
.nav-links a{
  font-size:14px;color:var(--ink-2);font-weight:500;
  padding:8px 12px;border-radius:9px;transition:.2s;
}
.nav-links a:hover{background:var(--green-soft);color:var(--green-deep);}
.nav-cta{
  background:var(--green);color:#fff !important;font-weight:600;
  padding:9px 18px !important;border-radius:10px;
}
.nav-cta:hover{background:var(--green-deep) !important;color:#fff !important;}
.nav-toggle{display:none;background:none;border:1px solid var(--line);border-radius:9px;padding:8px 11px;font-size:15px;color:var(--ink);cursor:pointer;}

/* ---------- 首屏 ---------- */
.hero{padding:72px 0 88px;background:
  radial-gradient(900px 420px at 78% -10%, #e8f7f2 0%, rgba(255,255,255,0) 70%),
  linear-gradient(180deg,#fbfdfc 0%,#ffffff 100%);}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;}
.hero h1{font-size:46px;line-height:1.2;font-weight:800;letter-spacing:-.02em;margin-bottom:20px;}
.hero h1 span{color:var(--green-deep);}
.hero .lead{font-size:17px;max-width:520px;margin-bottom:30px;}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:26px;}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:14px 26px;border-radius:12px;font-size:15px;font-weight:600;
  transition:.22s;border:1px solid transparent;
}
.btn-primary{background:var(--green);color:#fff;box-shadow:0 8px 20px -8px rgba(15,157,122,.6);}
.btn-primary:hover{background:var(--green-deep);transform:translateY(-2px);}
.btn-ghost{background:#fff;color:var(--ink);border-color:var(--line);}
.btn-ghost:hover{border-color:var(--green);color:var(--green-deep);}
.hero-facts{display:flex;gap:28px;flex-wrap:wrap;padding-top:8px;}
.fact b{display:block;font-size:19px;font-weight:800;color:var(--ink);}
.fact span{font-size:13px;color:var(--ink-3);}

/* 首屏轮播 */
.showcase{position:relative;height:520px;display:flex;justify-content:center;}
.phone-stack{position:relative;width:100%;max-width:400px;}
.phone{
  position:absolute;inset:0;margin:auto;
  width:250px;height:500px;border-radius:30px;
  border:8px solid #111614;background:#fff;overflow:hidden;
  box-shadow:0 30px 60px -30px rgba(17,22,20,.4);
  animation:fadeLoop 15s infinite;
}
.phone img{width:100%;height:100%;object-fit:cover;object-position:top;}
.phone.p1{animation-delay:0s;}
.phone.p2{animation-delay:5s;}
.phone.p3{animation-delay:10s;}
@keyframes fadeLoop{
  0%,30%{opacity:1;transform:translateY(0) scale(1);}
  35%,95%{opacity:0;transform:translateY(10px) scale(.97);}
  100%{opacity:1;transform:translateY(0) scale(1);}
}
.hero-badge{
  position:absolute;bottom:16px;right:-6px;background:#fff;
  border:1px solid var(--line);border-radius:14px;padding:12px 16px;
  box-shadow:0 16px 32px -20px rgba(17,22,20,.35);font-size:13px;
  color:var(--ink-2);display:flex;align-items:center;gap:8px;
}
.dot{width:8px;height:8px;border-radius:50%;background:var(--green);display:inline-block;}

/* ---------- 核心功能：瀑布流 ---------- */
.features{background:var(--bg-soft);}
.masonry{column-count:3;column-gap:20px;}
.m-card{
  break-inside:avoid;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius);padding:26px;margin-bottom:20px;transition:.22s;
}
.m-card:hover{transform:translateY(-3px);border-color:#cdeae0;box-shadow:0 18px 34px -26px rgba(17,22,20,.4);}
.m-icon{
  width:42px;height:42px;border-radius:12px;background:var(--green-soft);
  display:flex;align-items:center;justify-content:center;
  font-size:20px;color:var(--green-deep);margin-bottom:16px;font-weight:700;
}
.m-card h3{font-size:17px;}
.m-card p{font-size:14.5px;color:var(--ink-3);}

/* ---------- 界面展示：Z字交错 ---------- */
.shots{background:#fff;}
.z-row{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;margin-bottom:72px;}
.z-row:last-child{margin-bottom:0;}
.z-row.reverse .z-text{order:2;}
.z-row.reverse .z-shot{order:1;}
.z-text .num{font-size:14px;font-weight:700;color:var(--green);letter-spacing:.1em;margin-bottom:10px;display:block;}
.z-text h3{font-size:26px;margin-bottom:12px;}
.z-text p{font-size:15.5px;}
.z-shot{
  border-radius:20px;overflow:hidden;border:1px solid var(--line);
  box-shadow:0 24px 48px -34px rgba(17,22,20,.5);background:#fff;
}
.z-shot img{width:100%;height:380px;object-fit:cover;object-position:top;}
.z-shot.tall img{height:440px;}

/* ---------- 深度内容：阶梯榜单 ---------- */
.depth{background:var(--bg-soft);}
.steps{display:flex;flex-direction:column;gap:16px;}
.step{
  display:grid;grid-template-columns:78px 1fr;gap:22px;align-items:start;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 28px;transition:.22s;
}
.step:hover{border-color:#cdeae0;transform:translateX(4px);}
.step-no{
  font-size:26px;font-weight:800;color:#fff;background:var(--green);
  width:56px;height:56px;border-radius:14px;display:flex;align-items:center;justify-content:center;
}
.step:nth-child(3n+2) .step-no{background:var(--green-deep);}
.step:nth-child(3n+3) .step-no{background:#39b79a;}
.step h3{font-size:18px;margin-bottom:6px;}
.step p{font-size:14.5px;color:var(--ink-3);}

/* ---------- 使用反馈 ---------- */
.reviews{background:#fff;}
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.review{
  background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;display:flex;flex-direction:column;gap:14px;
}
.review-top{display:flex;align-items:center;gap:12px;}
.avatar{
  width:42px;height:42px;border-radius:50%;object-fit:cover;
  border:1px solid var(--line);background:#fff;flex:none;
}
.review-name{font-size:14px;font-weight:700;}
.review-meta{font-size:12px;color:var(--ink-3);}
.review p{font-size:14.5px;color:var(--ink-2);}

/* ---------- 隐私安全 ---------- */
.privacy{background:var(--green-soft);}
.privacy-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center;}
.privacy-list{display:grid;gap:14px;margin-top:26px;}
.privacy-item{display:flex;gap:12px;align-items:flex-start;background:#fff;border-radius:12px;padding:16px 18px;border:1px solid #d8ece4;}
.check{width:22px;height:22px;border-radius:50%;background:var(--green);color:#fff;font-size:13px;display:flex;align-items:center;justify-content:center;flex:none;margin-top:2px;}
.privacy-item b{font-size:15px;display:block;color:var(--ink);}
.privacy-item span{font-size:13.5px;color:var(--ink-3);}
.privacy-shot{border-radius:18px;overflow:hidden;border:1px solid #d8ece4;box-shadow:0 22px 44px -30px rgba(11,125,97,.5);}
.privacy-shot img{width:100%;height:420px;object-fit:cover;object-position:top;}

/* ---------- FAQ ---------- */
.faq{background:#fff;}
.faq-list{display:grid;gap:12px;max-width:900px;}
.faq-item{border:1px solid var(--line);border-radius:14px;overflow:hidden;background:#fff;}
.faq-q{
  width:100%;text-align:left;background:none;border:0;cursor:pointer;
  font-size:16px;font-weight:600;color:var(--ink);padding:20px 24px;
  display:flex;justify-content:space-between;gap:16px;align-items:center;font-family:inherit;
}
.faq-q .sign{color:var(--green);font-size:20px;font-weight:700;flex:none;transition:.2s;}
.faq-a{padding:0 24px 20px;font-size:14.5px;color:var(--ink-3);display:block;}

/* ---------- 下载区 ---------- */
.download{padding:84px 0;background:linear-gradient(180deg,#fbfdfc,#eef8f4);}
.dl-panel{
  background:#fff;border:1px solid var(--line);border-radius:24px;
  padding:48px;display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center;
  box-shadow:0 30px 60px -50px rgba(17,22,20,.5);
}
.dl-panel h2{font-size:30px;}
.dl-steps{display:grid;gap:12px;margin:24px 0 28px;}
.dl-step{display:flex;gap:12px;align-items:flex-start;font-size:14.5px;color:var(--ink-2);}
.dl-step i{
  font-style:normal;width:24px;height:24px;border-radius:8px;background:var(--green-soft);
  color:var(--green-deep);font-size:13px;font-weight:700;display:flex;align-items:center;justify-content:center;flex:none;
}
.dl-actions{display:flex;gap:12px;flex-wrap:wrap;}
.qr-box{display:flex;flex-direction:column;align-items:center;gap:12px;text-align:center;}
.qr-box img{width:180px;height:180px;border-radius:14px;border:1px solid var(--line);padding:8px;background:#fff;}
.qr-box span{font-size:13px;color:var(--ink-3);}

/* ---------- 页脚 ---------- */
.site-footer{background:#0f1614;color:#c9d4d0;padding:56px 0 28px;font-size:14px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px;padding-bottom:36px;border-bottom:1px solid rgba(255,255,255,.1);}
.footer-brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:17px;color:#fff;margin-bottom:14px;}
.footer-brand img{height:28px;width:auto;border-radius:7px;}
.site-footer p{color:#93a39e;font-size:13.5px;line-height:1.8;}
.footer-col h4{color:#fff;font-size:14px;margin-bottom:14px;font-weight:600;}
.footer-col a{display:block;color:#93a39e;font-size:13.5px;margin-bottom:8px;}
.footer-col a:hover{color:#5fd3b4;}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;gap:16px;padding-top:24px;flex-wrap:wrap;font-size:12.5px;color:#7d8d88;}
.footer-bottom time{color:#7d8d88;}

/* ---------- 复制弹层 ---------- */
.copy-mask{
  position:fixed;inset:0;background:rgba(10,20,17,.55);z-index:200;
  display:none;align-items:center;justify-content:center;padding:20px;
}
.copy-mask.open{display:flex;}
.copy-box{background:#fff;border-radius:18px;padding:28px;max-width:420px;width:100%;}
.copy-box p{font-size:15px;color:var(--ink);font-weight:600;margin-bottom:16px;line-height:1.6;}
.copy-url{
  background:var(--bg-soft);border:1px solid var(--line);border-radius:10px;
  padding:12px 14px;font-size:13px;word-break:break-all;color:var(--ink-2);margin-bottom:16px;
}
.copy-actions{display:flex;gap:10px;}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .hero h1{font-size:38px;}
  .masonry{column-count:2;}
  .review-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:768px){
  section{padding:60px 0;}
  .wrap{padding:0 18px;}
  .nav-toggle{display:block;}
  .nav-links{
    position:absolute;top:66px;left:0;right:0;background:#fff;
    flex-direction:column;align-items:stretch;gap:2px;
    padding:12px 18px 18px;border-bottom:1px solid var(--line);
    display:none;
  }
  .nav-links.open{display:flex;}
  .nav-links a{padding:11px 12px;}
  .nav-cta{text-align:center;}
  .hero{padding:44px 0 60px;}
  .hero-grid{grid-template-columns:1fr;gap:40px;}
  .hero h1{font-size:31px;}
  .hero .lead{font-size:15.5px;}
  h2{font-size:26px;}
  .masonry{column-count:1;}
  .z-row,.z-row.reverse{grid-template-columns:1fr;gap:24px;}
  .z-row.reverse .z-text,.z-row.reverse .z-shot{order:0;}
  .z-shot img{height:280px;}
  .z-shot.tall img{height:320px;}
  .step{grid-template-columns:1fr;gap:14px;padding:22px;}
  .step-no{width:48px;height:48px;font-size:22px;}
  .review-grid{grid-template-columns:1fr;}
  .privacy-grid{grid-template-columns:1fr;gap:32px;}
  .privacy-shot img{height:340px;}
  .dl-panel{grid-template-columns:1fr;padding:28px;gap:32px;}
  .dl-panel h2{font-size:24px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .showcase{height:460px;}
  .phone{width:220px;height:430px;}
}