*,::before,::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:'Inter','Noto Sans SC',sans-serif;background:#0d1117;color:#c9d1d9;line-height:1.6;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
ul{list-style:none}

:root{
  --bg:#0d1117;
  --bg-card:#161b22;
  --bg-card2:#1c2333;
  --border:#30363d;
  --text:#e6edf3;
  --muted:#8b949e;
  --blue:#58a6ff;
  --blue-dark:#1a6fc4;
  --blue-deeper:#0d4fa3;
  --green:#3fb950;
  --orange:#f0883e;
  --r:12px;
}

.container{max-width:1200px;margin:0 auto;padding:0 24px}

/* ─── HEADER ─────────────────────────────────────────────── */
#site-header{
  position:fixed;top:0;left:0;right:0;z-index:999;
  background:rgba(13,17,23,.97);
  border-bottom:1px solid var(--border);
}
#site-header .inner{
  display:flex;align-items:center;justify-content:space-between;
  height:64px;max-width:1200px;margin:0 auto;padding:0 32px;
}
.logo{
  display:flex;align-items:center;gap:10px;
  font-weight:700;font-size:1.1rem;color:var(--text);
  flex-shrink:0;
}
.logo svg{width:28px;height:28px;flex-shrink:0}
.logo em{font-style:normal;color:var(--blue)}
.desktop-nav{
  display:flex;align-items:center;gap:2px;
  flex:1;margin:0 32px;
}
.desktop-nav a{
  font-size:.875rem;font-weight:500;color:var(--muted);
  padding:7px 13px;border-radius:7px;white-space:nowrap;
  transition:color .15s,background .15s;
}
.desktop-nav a:hover{color:var(--text);background:rgba(255,255,255,.06)}
.dl-btn{
  display:flex;align-items:center;gap:7px;
  background:var(--blue);color:#0a0f1a;
  font-weight:700;font-size:.85rem;
  padding:9px 22px;border-radius:8px;
  flex-shrink:0;transition:opacity .15s;
}
.dl-btn:hover{opacity:.88}
.dl-btn svg{width:15px;height:15px;flex-shrink:0}
.menu-btn{
  display:none;flex-direction:column;justify-content:center;gap:5px;
  width:36px;height:36px;background:none;border:none;cursor:pointer;padding:6px;flex-shrink:0;
}
.menu-btn span{display:block;width:20px;height:2px;background:var(--text);border-radius:2px;transition:transform .25s,opacity .25s}
.menu-btn[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.menu-btn[aria-expanded="true"] span:nth-child(2){opacity:0;transform:scaleX(0)}
.menu-btn[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
#mobile-nav{
  display:none;flex-direction:column;
  background:var(--bg-card);border-top:1px solid var(--border);
  position:absolute;top:64px;left:0;right:0;
  box-shadow:0 16px 40px rgba(0,0,0,.5);
}
#mobile-nav.open{display:flex}
#mobile-nav a{
  display:block;padding:14px 28px;
  font-size:.95rem;color:var(--muted);
  border-bottom:1px solid var(--border);transition:color .15s,background .15s;
}
#mobile-nav a:hover{color:var(--text);background:var(--bg-card2)}
#mobile-nav a.mobile-dl{color:var(--blue);font-weight:700;border-bottom:none}

@media(max-width:900px){
  .desktop-nav,.dl-btn{display:none}
  .menu-btn{display:flex}
}
@media(min-width:901px){
  #mobile-nav{display:none!important}
}
/* ─────────────────────────────────────────────────────────── */

.hero{padding:144px 0 84px;text-align:center;position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;top:-200px;left:50%;transform:translateX(-50%);width:800px;height:800px;background:radial-gradient(circle,rgba(88,166,255,.08) 0%,transparent 70%);pointer-events:none}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(88,166,255,.1);border:1px solid rgba(88,166,255,.25);color:var(--blue);font-size:.8rem;font-weight:600;padding:6px 16px;border-radius:50px;margin-bottom:28px}
.hero h1{font-size:clamp(2rem,5vw,3.25rem);font-weight:800;color:var(--text);line-height:1.2;max-width:760px;margin:0 auto 20px;letter-spacing:-.02em}
.hero h1 span{background:linear-gradient(135deg,var(--blue),#79c0ff);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-desc{font-size:1.05rem;color:var(--muted);max-width:620px;margin:0 auto 36px;line-height:1.75}
.hero-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-bottom:48px}
.btn-primary{display:inline-flex;align-items:center;gap:8px;background:linear-gradient(135deg,var(--blue-dark),var(--blue-deeper));color:#fff;font-weight:700;font-size:1rem;padding:14px 32px;border-radius:10px;border:none;cursor:pointer;transition:transform .2s,box-shadow .2s;box-shadow:0 4px 24px rgba(88,166,255,.25)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 32px rgba(88,166,255,.35)}
.btn-secondary{display:inline-flex;align-items:center;gap:8px;background:transparent;color:var(--text);font-weight:600;font-size:1rem;padding:14px 28px;border-radius:10px;border:1px solid var(--border);cursor:pointer;transition:all .2s}
.btn-secondary:hover{border-color:var(--blue);color:var(--blue)}
.hero-stats{display:flex;gap:40px;justify-content:center;flex-wrap:wrap}
.hero-stat{display:flex;align-items:center;gap:8px;font-size:.875rem;color:var(--muted)}
.hero-stat strong{color:var(--text)}

.section{padding:80px 0}
.section-tag{display:inline-block;font-size:.75rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--blue);background:rgba(88,166,255,.08);border:1px solid rgba(88,166,255,.2);padding:4px 12px;border-radius:50px;margin-bottom:14px}
.section-title{font-size:clamp(1.6rem,3.5vw,2.25rem);font-weight:800;color:var(--text);margin-bottom:12px;letter-spacing:-.02em}
.section-subtitle{color:var(--muted);font-size:1rem;max-width:560px;margin:0 auto}
.section-header{text-align:center;margin-bottom:56px}

.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:20px}
.feature-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--r);padding:28px;transition:border-color .2s,transform .2s}
.feature-card:hover{border-color:var(--blue);transform:translateY(-3px)}
.feature-icon{font-size:2rem;margin-bottom:16px}
.feature-card h3{font-size:1.05rem;font-weight:700;color:var(--text);margin-bottom:12px}
.pain-row{display:flex;gap:8px;font-size:.875rem;margin-bottom:6px;align-items:flex-start}
.pain-row .label{font-weight:600;white-space:nowrap;flex-shrink:0}
.pain{color:#f85149}
.solve{color:var(--green)}
.feature-card p{font-size:.875rem;color:var(--muted);margin-top:12px;line-height:1.65}

.scenarios-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px}
.scenario-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--r);padding:28px;text-align:center;transition:all .2s}
.scenario-card:hover{background:var(--bg-card2);border-color:rgba(88,166,255,.4)}
.scenario-icon{font-size:2.5rem;margin-bottom:14px}
.scenario-card h3{font-size:1rem;font-weight:700;color:var(--text);margin-bottom:10px}
.scenario-card p{font-size:.875rem;color:var(--muted);line-height:1.6}

.funcs-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px}
.func-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--r);padding:24px;display:flex;gap:18px;align-items:flex-start;transition:border-color .2s}
.func-card:hover{border-color:rgba(88,166,255,.35)}
.func-num{width:36px;height:36px;border-radius:8px;background:rgba(88,166,255,.12);color:var(--blue);font-weight:800;font-size:.9rem;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.func-card h3{font-size:.95rem;font-weight:700;color:var(--text);margin-bottom:6px}
.func-card p{font-size:.85rem;color:var(--muted);line-height:1.6}

.reviews-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:20px}
.review-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--r);padding:28px}
.review-quote{font-size:1.5rem;color:rgba(88,166,255,.3);line-height:1;margin-bottom:12px}
.review-stars{color:var(--orange);font-size:.9rem;margin-bottom:14px;letter-spacing:2px}
.review-text{font-size:.9rem;color:var(--muted);line-height:1.7;margin-bottom:20px}
.review-author{display:flex;align-items:center;gap:12px}
.review-avatar{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,var(--blue-dark),var(--blue-deeper));display:flex;align-items:center;justify-content:center;font-weight:700;color:#fff;font-size:.9rem}
.review-info strong{display:block;font-size:.875rem;color:var(--text);font-weight:600}
.review-info span{font-size:.8rem;color:var(--muted)}

.news-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px}
.news-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--r);padding:24px;transition:border-color .2s}
.news-card:hover{border-color:rgba(88,166,255,.35)}
.news-date{font-size:.78rem;color:var(--muted);margin-bottom:10px}
.news-card h3{font-size:.95rem;font-weight:700;color:var(--text);margin-bottom:10px;line-height:1.45}
.news-card p{font-size:.85rem;color:var(--muted);line-height:1.6}
.news-tag{display:inline-block;margin-top:14px;font-size:.75rem;font-weight:600;padding:3px 10px;border-radius:50px;background:rgba(88,166,255,.1);color:var(--blue)}

.faq-list{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq-item{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--r);overflow:hidden}
.faq-question{display:flex;align-items:center;justify-content:space-between;padding:20px 24px;cursor:pointer;font-weight:600;font-size:.95rem;color:var(--text);transition:background .2s;user-select:none}
.faq-question:hover{background:var(--bg-card2)}
.faq-icon{width:22px;height:22px;border-radius:50%;border:1.5px solid var(--border);display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:transform .3s,border-color .3s;font-size:.85rem;color:var(--muted)}
.faq-item.open .faq-icon{transform:rotate(45deg);border-color:var(--blue);color:var(--blue)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-answer.open{max-height:1200px}
.faq-answer-inner{padding:0 24px 20px;border-top:1px solid var(--border)}
.faq-step{display:flex;gap:14px;margin-top:16px;align-items:flex-start}
.faq-step-num{width:28px;height:28px;border-radius:8px;background:rgba(88,166,255,.12);color:var(--blue);font-weight:700;font-size:.8rem;display:flex;align-items:center;justify-content:center;flex-shrink:0;margin-top:1px}
.faq-step-content strong{display:block;font-size:.9rem;color:var(--text);margin-bottom:4px}
.faq-step-content p{font-size:.875rem;color:var(--muted);line-height:1.65}

.cta-section{padding:80px 0;text-align:center}
.cta-box{background:linear-gradient(135deg,rgba(26,111,196,.15),rgba(13,79,163,.1));border:1px solid rgba(88,166,255,.2);border-radius:20px;padding:64px 40px;position:relative;overflow:hidden}
.cta-box::before{content:'';position:absolute;top:-100px;left:50%;transform:translateX(-50%);width:500px;height:500px;background:radial-gradient(circle,rgba(88,166,255,.07) 0%,transparent 70%);pointer-events:none}
.cta-box h2{font-size:clamp(1.5rem,3.5vw,2rem);font-weight:800;color:var(--text);margin-bottom:12px}
.cta-box p{color:var(--muted);margin-bottom:32px;font-size:1rem}
.cta-platforms{margin-top:20px;font-size:.85rem;color:var(--muted)}
.cta-platforms span{color:var(--text);font-weight:500}

footer{background:var(--bg-card);border-top:1px solid var(--border);padding:48px 0 24px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
.footer-brand p{font-size:.875rem;color:var(--muted);margin-top:12px;line-height:1.65;max-width:260px}
.footer-brand .logo{margin-bottom:4px}
.footer-col h4{font-size:.875rem;font-weight:700;color:var(--text);margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col ul a{font-size:.85rem;color:var(--muted);transition:color .2s}
.footer-col ul a:hover{color:var(--blue)}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;padding-top:24px;border-top:1px solid var(--border);font-size:.8rem;color:var(--muted);flex-wrap:wrap;gap:12px}
.footer-bottom a{color:var(--muted);transition:color .2s}
.footer-bottom a:hover{color:var(--blue)}
.footer-links{display:flex;gap:20px}

.divider{height:1px;background:var(--border);max-width:1200px;margin:0 auto}
section[id]{scroll-margin-top:80px}
.fade-in{opacity:0;transform:translateY(18px);transition:opacity .5s ease,transform .5s ease}
.fade-in.visible{opacity:1;transform:none}

@media(max-width:900px){
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:640px){
  .hero{padding:110px 0 60px}
  .hero-stats{gap:20px}
  .section{padding:56px 0}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;text-align:center}
  .features-grid,.funcs-grid{grid-template-columns:1fr}
  #site-header .inner{padding:0 18px}
}