*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#0d0f14;
  --bg2:#151820;
  --bg3:#1c2030;
  --text:#e8eaef;
  --muted:#8b92a5;
  --accent:#39ff14;
  --accent-dim:#2ecc11;
  --border:#2a3040;
  --radius:12px;
  --max:1200px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif
}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.75;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--accent);text-decoration:none;transition:color .2s}
a:hover{color:#7dff5a}
.container{width:min(100% - 32px,var(--max));margin-inline:auto}

/* Header */
.site-header{position:relative;z-index:2;background:rgba(13,15,20,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:14px 0;gap:16px}
.logo-wrap{display:flex;align-items:center;gap:12px;color:var(--text);font-weight:700;font-size:1.25rem}
.logo-wrap img{width:42px;height:42px;border-radius:10px}
.main-nav{display:flex;gap:6px;flex-wrap:wrap}
.main-nav a{color:var(--muted);padding:8px 14px;border-radius:8px;font-size:.95rem}
.main-nav a:hover,.main-nav a.active{color:var(--accent);background:rgba(57,255,20,.08)}
.nav-toggle{display:none;background:none;border:1px solid var(--border);color:var(--text);padding:8px 12px;border-radius:8px;cursor:pointer;font-size:1.1rem}

/* Hero */
.hero{padding:56px 0 48px;background:linear-gradient(180deg,var(--bg2) 0%,var(--bg) 100%)}
.hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.hero h1{font-size:clamp(1.75rem,4vw,2.5rem);line-height:1.3;margin-bottom:16px}
.hero-desc{color:var(--muted);font-size:1.05rem;margin-bottom:28px}
.hero-btns{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:24px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 28px;border-radius:10px;font-weight:600;font-size:1rem;border:none;cursor:pointer;transition:transform .2s,box-shadow .2s}
.btn-primary{background:var(--accent);color:#0d0f14}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(57,255,20,.3);color:#0d0f14}
.btn-outline{background:transparent;border:2px solid var(--accent);color:var(--accent)}
.btn-outline:hover{background:rgba(57,255,20,.1);color:var(--accent)}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px}
.tag{background:var(--bg3);border:1px solid var(--border);padding:6px 14px;border-radius:20px;font-size:.85rem;color:var(--muted)}
.hero-phone{max-width:320px;margin-inline:auto;border-radius:24px;box-shadow:0 20px 60px rgba(0,0,0,.5);border:3px solid var(--border)}

/* Sections */
section{padding:56px 0}
.section-title{text-align:center;margin-bottom:12px;font-size:clamp(1.4rem,3vw,1.85rem)}
.section-sub{text-align:center;color:var(--muted);margin-bottom:40px;max-width:640px;margin-inline:auto}
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature-card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:28px;transition:border-color .2s}
.feature-card:hover{border-color:var(--accent)}
.feature-card h3{font-size:1.1rem;margin-bottom:10px;color:var(--accent)}
.feature-card p{color:var(--muted);font-size:.95rem}

/* Screenshot gallery */
.gallery-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.gallery-item{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:transform .2s}
.gallery-item:hover{transform:translateY(-4px)}
.gallery-item img{width:100%;aspect-ratio:9/16;object-fit:cover}
.gallery-item figcaption{padding:12px 14px;font-size:.85rem;color:var(--muted);text-align:center}

/* Content blocks */
.content-block{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:32px;margin-bottom:28px}
.content-block h2{font-size:1.35rem;margin-bottom:16px;color:var(--accent);padding-bottom:10px;border-bottom:1px solid var(--border)}
.content-block h3{font-size:1.1rem;margin:20px 0 10px}
.content-block p,.content-block li{color:var(--muted);margin-bottom:12px}
.content-block ul,.content-block ol{padding-left:24px;margin-bottom:16px}
.content-block li{margin-bottom:8px}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:start}
.inline-img{border-radius:var(--radius);border:1px solid var(--border);max-width:280px;margin:16px auto}

/* FAQ */
.faq-item{border-bottom:1px solid var(--border);padding:18px 0}
.faq-item:last-child{border-bottom:none}
.faq-item h3{font-size:1rem;margin-bottom:8px;color:var(--text)}
.faq-item p{font-size:.95rem;color:var(--muted)}

/* Download steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:step}
.step{background:var(--bg3);border:1px solid var(--border);border-radius:var(--radius);padding:24px 18px;text-align:center;position:relative}
.step::before{counter-increment:step;content:counter(step);display:block;width:36px;height:36px;line-height:36px;background:var(--accent);color:#0d0f14;border-radius:50%;margin:0 auto 14px;font-weight:700}
.step h4{font-size:.95rem;margin-bottom:8px}
.step p{font-size:.85rem;color:var(--muted)}

/* Page layout */
.page-hero{padding:48px 0 32px;background:var(--bg2);border-bottom:1px solid var(--border);text-align:center}
.page-hero h1{font-size:clamp(1.5rem,3vw,2rem);margin-bottom:10px}
.page-hero p{color:var(--muted)}
.page-content{padding:48px 0;max-width:860px;margin-inline:auto}
.page-content h2{font-size:1.25rem;margin:28px 0 12px;color:var(--accent)}
.page-content h3{font-size:1.05rem;margin:20px 0 10px}
.page-content p,.page-content li{color:var(--muted);margin-bottom:12px;font-size:.95rem}
.page-content ul,.page-content ol{padding-left:24px;margin-bottom:16px}

/* Footer */
.site-footer{background:var(--bg2);border-top:1px solid var(--border);padding:48px 0 24px;margin-top:40px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:32px;margin-bottom:32px}
.footer-brand img{width:48px;border-radius:10px;margin-bottom:12px}
.footer-brand p{color:var(--muted);font-size:.9rem;max-width:360px}
.footer-col h4{font-size:.95rem;margin-bottom:14px;color:var(--text)}
.footer-col a{display:block;color:var(--muted);font-size:.9rem;padding:4px 0}
.footer-col a:hover{color:var(--accent)}
.footer-bottom{text-align:center;padding-top:24px;border-top:1px solid var(--border);color:var(--muted);font-size:.85rem}

/* Error pages */
.error-page{min-height:80vh;display:flex;align-items:center;justify-content:center;text-align:center;padding:40px 20px}
.error-page h1{font-size:5rem;color:var(--accent);line-height:1}
.error-page h2{margin:16px 0 12px}
.error-page p{color:var(--muted);margin-bottom:24px}

/* Breadcrumb */
.breadcrumb{padding:14px 0;font-size:.85rem;color:var(--muted)}
.breadcrumb a{color:var(--muted)}
.breadcrumb span{margin:0 8px}

/* Responsive */
@media(max-width:992px){
  .hero-grid,.two-col{grid-template-columns:1fr}
  .feature-grid{grid-template-columns:repeat(2,1fr)}
  .gallery-grid{grid-template-columns:repeat(3,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .hero-phone{order:-1;max-width:260px}
}
@media(max-width:768px){
  .nav-toggle{display:block}
  .main-nav{display:none;position:absolute;top:100%;left:0;right:0;z-index:10;background:var(--bg2);border-bottom:1px solid var(--border);flex-direction:column;padding:12px 16px;box-shadow:0 12px 24px rgba(0,0,0,.35)}
  .main-nav.open{display:flex}
  .main-nav a{padding:12px 16px}
  .header-inner{position:relative;flex-wrap:wrap}
  .feature-grid,.gallery-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  section{padding:40px 0}
  .hero{padding:36px 0}
  .content-block{padding:22px}
}