/* === Base === */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{--bg:#0a0a1a;--surface:#111128;--border:#1a1a3a;--green:#00ff88;--blue:#00aaff;--text:#e0e0e0;--text-dim:#888;--mono:'JetBrains Mono',monospace;--sans:-apple-system,BlinkMacSystemFont,'Segoe UI','Noto Sans SC',sans-serif;--max-w:1100px}
html{scroll-behavior:smooth;font-size:16px}
body{background:var(--bg);color:var(--text);font-family:var(--sans);line-height:1.6;overflow-x:hidden}
a{color:var(--green);text-decoration:none}
.container{max-width:var(--max-w);margin:0 auto;padding:0 1.5rem}

/* === Nav === */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;backdrop-filter:blur(12px);background:rgba(10,10,26,.8);border-bottom:1px solid var(--border)}
.nav-inner{max-width:var(--max-w);margin:0 auto;padding:.8rem 1.5rem;display:flex;align-items:center;justify-content:space-between}
.logo{font-weight:700;color:#fff;display:inline-flex;flex-direction:column;align-items:stretch;gap:0;line-height:1}
.logo-cn{font-size:1.2rem;letter-spacing:.3em;font-weight:800;background:linear-gradient(90deg,var(--green),var(--blue));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.logo-divider{height:1px;background:var(--green);opacity:.3;margin:4px 0 3px}
.logo-en{font-family:var(--mono);font-size:.55rem;color:var(--text-dim);letter-spacing:.35em;text-transform:uppercase;text-align:center}
.nav-links{display:flex;gap:1.5rem;font-size:.9rem}
.nav-links a{color:var(--text-dim);transition:color .2s}
.nav-links a:hover{color:#fff}

/* === Buttons === */
.btn{display:inline-block;padding:.7rem 1.6rem;border-radius:8px;font-size:.95rem;font-weight:600;transition:all .2s;cursor:pointer;border:none;font-family:var(--sans)}
.btn-primary{background:var(--green);color:#000}
.btn-primary:hover{box-shadow:0 0 24px rgba(0,255,136,.3);transform:translateY(-1px)}
.btn-outline{border:1px solid var(--border);color:var(--text);background:transparent}
.btn-outline:hover{border-color:var(--green);color:var(--green)}
.btn-block{display:block;text-align:center;width:100%}
.cta-group{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap}

/* === Hero === */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;justify-content:center;text-align:center;padding:6rem 1.5rem 4rem;overflow:hidden}
.hero-content{position:relative;z-index:2}
.hero h1{font-family:var(--mono);font-size:clamp(2.2rem,6vw,4rem);font-weight:700;color:#fff;margin-bottom:1rem;letter-spacing:-.03em}
.subtitle{font-size:clamp(1rem,2.5vw,1.3rem);color:var(--text-dim);margin-bottom:2.5rem;line-height:1.8}
.hero-glow{position:absolute;width:600px;height:600px;border-radius:50%;background:radial-gradient(circle,rgba(0,255,136,.08),transparent 70%);top:50%;left:50%;transform:translate(-50%,-50%);z-index:0;pointer-events:none}
.grid-bg{position:absolute;inset:0;z-index:0;background-image:linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);background-size:60px 60px;mask-image:radial-gradient(ellipse 80% 60% at 50% 40%,#000,transparent)}

/* === Sections === */
.section{padding:6rem 0}
.section-title{font-family:var(--mono);font-size:clamp(1.5rem,4vw,2.2rem);color:#fff;text-align:center;margin-bottom:.8rem}
.section-sub{text-align:center;color:var(--text-dim);margin-bottom:3rem;font-size:1rem}

/* === Features === */
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.5rem;margin-top:3rem}
.card{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:2rem;transition:transform .25s,border-color .25s}
.card:hover{transform:translateY(-4px);border-color:var(--green)}
.card-icon{font-size:2rem;margin-bottom:1rem}
.card h3{font-family:var(--mono);font-size:1.1rem;color:#fff;margin-bottom:.5rem}
.card p{color:var(--text-dim);font-size:.9rem;line-height:1.6}

/* === Stats === */
.section-stats{border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.stats-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:2rem;text-align:center}
.stat-num{font-family:var(--mono);font-size:clamp(2rem,5vw,3.5rem);font-weight:700;color:var(--green);display:block}
.stat-label{color:var(--text-dim);font-size:.9rem;margin-top:.3rem;display:block}

/* === Pricing === */
.pricing-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:2rem;max-width:800px;margin:0 auto}
.price-card{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:2.5rem 2rem;position:relative;transition:transform .25s}
.price-card:hover{transform:translateY(-4px)}
.price-card.featured{border-color:var(--green)}
.price-badge{position:absolute;top:-12px;right:20px;background:var(--green);color:#000;font-size:.75rem;font-weight:700;padding:.3rem .8rem;border-radius:20px}
.price-tier{font-family:var(--mono);font-size:1.1rem;color:#fff;margin-bottom:.5rem}
.price-amount{font-family:var(--mono);font-size:2.5rem;color:#fff;font-weight:700;margin-bottom:1.5rem}
.price-amount span{font-size:1rem;color:var(--text-dim);font-weight:400}
.price-annual{font-size:.85rem;color:var(--text-dim);margin-bottom:1.5rem;padding:.4rem .8rem;background:rgba(0,255,136,.05);border-radius:6px;border:1px solid rgba(0,255,136,.1)}
.price-annual em{color:var(--green);font-style:normal;font-weight:600}
.price-card ul{list-style:none;margin-bottom:2rem}
.price-card li{padding:.45rem 0;color:var(--text-dim);font-size:.9rem;border-bottom:1px solid rgba(255,255,255,.04)}
.price-card li::before{content:"✓ ";color:var(--green)}
.pricing-note{text-align:center;margin-top:2rem;color:var(--text-dim);font-size:.9rem}

/* === Tech === */
.section-tech{padding:3rem 0;border-top:1px solid var(--border)}
.tech-bar{display:flex;justify-content:center;flex-wrap:wrap;gap:1.5rem 2.5rem;font-family:var(--mono);font-size:.95rem;color:var(--text-dim)}
.tech-bar span{transition:color .2s}
.tech-bar span:hover{color:var(--blue)}

/* === About === */
#about{border-top:1px solid var(--border)}
.about-content{max-width:640px;margin:2rem auto 0;text-align:center}
.about-content p{margin-bottom:1rem;color:var(--text-dim);line-height:1.8}
.about-content strong{color:#fff}

/* === Footer === */
.footer{border-top:1px solid var(--border);padding:3rem 0 1.5rem}
.footer-inner{display:flex;justify-content:space-between;align-items:flex-start;flex-wrap:wrap;gap:1.5rem}
.footer-left{display:flex;flex-direction:column;align-items:flex-start}
.footer-company-cn{color:var(--text-dim);font-size:.8rem;margin-top:.6rem;letter-spacing:.05em}
.footer-company-en{color:#444;font-size:.65rem;letter-spacing:.03em;margin-top:.2rem}
.footer-logo{display:inline-flex;flex-direction:column;align-items:stretch;gap:0;line-height:1}
.footer-logo .logo-cn{font-size:1.3rem;letter-spacing:.3em;font-weight:800;background:linear-gradient(90deg,var(--green),var(--blue));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.footer-logo .logo-divider{height:1px;background:var(--green);opacity:.3;margin:5px 0 4px}
.footer-logo .logo-en{font-family:var(--mono);font-size:.6rem;color:var(--text-dim);letter-spacing:.35em;text-align:center}
.footer-left p{color:var(--text-dim);font-size:.85rem}
.footer-right{display:flex;align-items:center;gap:1.5rem}
.footer-links{display:flex;flex-direction:column;gap:.5rem;font-size:.9rem}
.footer-links a{color:var(--text-dim)}
.footer-links a:hover{color:var(--green)}
.footer-qr{text-align:center}
.footer-qr-img{width:64px;height:64px;border-radius:6px;border:1px solid var(--border)}
.footer-qr p{color:var(--text-dim);font-size:.7rem;margin-top:.3rem}
.footer-bottom{text-align:center;padding-top:2rem;margin-top:2rem;border-top:1px solid var(--border)}
.footer-bottom p{color:var(--text-dim);font-size:.8rem}

/* === Hero Trust === */
.hero-trust{margin-top:1.5rem;font-size:.85rem;color:var(--text-dim);opacity:.7}

/* === Stats suffix === */
.stat-num-suffix{font-family:var(--mono);font-size:clamp(1.2rem,3vw,2rem);font-weight:700;color:var(--green)}

/* === Screenshots === */
.screenshot-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.5rem}
.screenshot-item{text-align:center}
.screenshot-placeholder{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:4rem 1.5rem;font-size:1.5rem;margin-bottom:.8rem;transition:border-color .25s}
.screenshot-placeholder:hover{border-color:var(--green)}
.screenshot-img{width:100%;height:220px;object-fit:cover;object-position:top left;border-radius:12px;border:1px solid var(--border);transition:border-color .25s,transform .25s}
.screenshot-img:hover{border-color:var(--green);transform:translateY(-4px)}
.screenshot-item p{color:var(--text-dim);font-size:.85rem;margin-top:.8rem}

/* === Screenshot Mocks === */
.screenshot-mock{background:#0d0d24;border:1px solid var(--border);border-radius:12px;overflow:hidden;transition:border-color .25s}
.screenshot-mock:hover{border-color:var(--green)}
.mock-topbar{display:flex;align-items:center;gap:6px;padding:8px 12px;background:rgba(255,255,255,.03);border-bottom:1px solid var(--border)}
.mock-dot{width:8px;height:8px;border-radius:50%}
.mock-dot.green{background:#00ff88}.mock-dot.yellow{background:#f59e0b}.mock-dot.red{background:#ff6b6b}
.mock-title{font-family:var(--mono);font-size:.65rem;color:var(--text-dim);margin-left:8px}
.mock-body{padding:12px}
.mock-row{display:flex;gap:8px;margin-bottom:10px}
.mock-card-sm{flex:1;background:rgba(255,255,255,.03);border:1px solid var(--border);border-radius:6px;padding:8px;text-align:center}
.mock-num{font-family:var(--mono);font-size:1.1rem;font-weight:700;color:var(--green)}
.mock-lbl{font-size:.55rem;color:var(--text-dim);margin-top:2px}
.mock-chart{height:50px;background:rgba(255,255,255,.02);border-radius:6px;padding:4px;overflow:hidden}
.mock-chart svg{width:100%;height:100%}
.mock-topo-body{height:140px;display:flex;align-items:center;justify-content:center}
.mock-topo-body svg{width:100%;height:100%}
.mock-chat-body{display:flex;flex-direction:column;gap:6px;min-height:140px}
.mock-msg{padding:6px 10px;border-radius:8px;font-size:.7rem;line-height:1.5;max-width:90%}
.mock-msg-user{background:rgba(0,170,255,.15);color:#ccc;align-self:flex-end;border-bottom-right-radius:2px}
.mock-msg-ai{background:rgba(0,255,136,.08);color:#bbb;align-self:flex-start;border-bottom-left-radius:2px}

/* === Pricing 3-col === */
.pricing-grid-3{grid-template-columns:repeat(3,1fr);max-width:1000px}

/* === FAQ === */
.faq-list{max-width:700px;margin:2rem auto 0}
.faq-item{border-bottom:1px solid var(--border);padding:1.5rem 0}
.faq-item h3{font-family:var(--mono);font-size:1rem;color:#fff;margin-bottom:.5rem}
.faq-item p{color:var(--text-dim);font-size:.9rem;line-height:1.7}

/* === Trial Form === */
.section-trial{background:var(--surface)}
.trial-form{max-width:500px;margin:0 auto}
.form-row{display:flex;gap:1rem;margin-bottom:1rem}
.form-input{flex:1;background:var(--bg);border:1px solid var(--border);border-radius:8px;padding:.7rem 1rem;color:#fff;font-size:.9rem;font-family:var(--sans);outline:none;transition:border-color .2s}
.form-input:focus{border-color:var(--green)}
.form-input::placeholder{color:#555}
.trial-note{text-align:center;margin-top:1rem;font-size:.8rem;color:var(--text-dim)}

/* === Story Card === */
.story-card{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:2.5rem;max-width:700px;margin:0 auto}
.story-quote{font-size:1.15rem;line-height:1.8;color:var(--text);font-style:italic;margin-bottom:1.5rem;position:relative;padding-left:1.5rem;border-left:3px solid var(--green)}
.story-meta{display:flex;align-items:center;gap:1rem}
.story-avatar{font-size:2rem;width:48px;height:48px;background:rgba(0,255,136,.1);border-radius:50%;display:flex;align-items:center;justify-content:center}
.story-name{color:#fff;font-weight:600;font-size:.95rem}
.story-detail{color:var(--text-dim);font-size:.8rem;margin-top:.2rem}

/* === Nav Toggle (mobile only) === */
.nav-toggle{display:none;background:none;border:none;color:#fff;font-size:1.5rem;cursor:pointer;padding:.2rem .5rem}
@media(max-width:768px){
  .nav-toggle{display:block}
  .nav-links{display:none !important;position:absolute;top:100%;left:0;right:0;background:rgba(10,10,26,.95);flex-direction:column;padding:1rem 1.5rem;gap:.8rem;border-bottom:1px solid var(--border)}
  .nav-links.open{display:flex !important}
}

/* === Trial Success === */
.trial-success{text-align:center;margin-top:1.5rem;padding:1.2rem;background:rgba(0,255,136,.08);border:1px solid rgba(0,255,136,.2);border-radius:10px}
.trial-success p{color:var(--green);font-weight:600;font-size:1rem}

/* === Animations === */
.fade-in{opacity:0;transform:translateY(20px);transition:opacity .6s ease,transform .6s ease}
.fade-in.visible{opacity:1;transform:translateY(0)}

/* === How It Works === */
.how-it-works{display:grid;grid-template-columns:repeat(3,1fr);gap:2rem;max-width:800px;margin:2rem auto 0;text-align:center}
.step-card{position:relative}
.step-num{font-family:var(--mono);font-size:2.5rem;font-weight:700;color:var(--green);opacity:.3}
.step-title{font-family:var(--mono);font-size:1rem;color:#fff;margin:.5rem 0}
.step-desc{color:var(--text-dim);font-size:.85rem;line-height:1.6}
.step-arrow{position:absolute;right:-1.2rem;top:2rem;color:var(--green);opacity:.3;font-size:1.5rem}
@media(max-width:768px){.how-it-works{grid-template-columns:1fr}.step-arrow{display:none}}

/* === Footer Tagline === */
.footer-tagline{color:var(--text-dim);font-size:.75rem;margin-top:.4rem}

/* === Responsive === */
@media(max-width:768px){
  .features-grid{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .pricing-grid,.pricing-grid-3{grid-template-columns:1fr}
  .screenshot-grid{grid-template-columns:1fr}
  .form-row{flex-direction:column}
  .nav-links{gap:.8rem;font-size:.8rem}
  .section{padding:4rem 0}
}
@media(max-width:480px){
  .nav-links a:nth-child(3){display:none}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:1.5rem}
}

.price-tagline{color:var(--text-dim);font-size:.8rem;margin-bottom:.8rem;font-style:italic}