/* ===== RESET & BASE ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{--primary:#ff6b00;--primary-dark:#e55c00;--primary-light:rgba(255,107,0,.12);--dark:#1a1a2e;--dark2:#252545;--text:#fff;--text-muted:#a0a0b8;--border:#2d2d4a;--shadow:0 4px 20px rgba(0,0,0,.25);--radius:10px;--max:1200px}
html{scroll-behavior:smooth}
body{font-family:Inter,PingFang SC,Microsoft YaHei,sans-serif;color:#0f172a;background:#f8fafc;line-height:1.6;font-size:15px;-webkit-font-smoothing:antialiased}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 20px}

/* ===== LAYOUT UTILS ===== */
.section{padding:80px 0}
.section-sm{padding:48px 0}
.section-title{text-align:center;margin-bottom:16px;font-size:32px;font-weight:800;color:#0f172a;letter-spacing:-.5px}
.section-subtitle{text-align:center;color:#475569;font-size:16px;max-width:560px;margin:0 auto 52px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}

/* ===== NAVBAR ===== */
.navbar{
  position:sticky;top:0;z-index:1000;
  background:var(--dark);
  border-bottom:1px solid var(--border);
  box-shadow:0 2px 16px rgba(0,0,0,.2)
}
.nav-inner{
  max-width:var(--max);margin:0 auto;padding:0 20px;
  display:flex;align-items:center;height:60px;gap:32px
}
.nav-logo{
  display:flex;align-items:center;gap:8px;
  font-size:18px;font-weight:700;color:var(--text);
  white-space:nowrap;flex-shrink:0
}
.nav-logo span{
  background:linear-gradient(135deg,#ff6b00,#ff8c00);
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;
  background-clip:text
}
.nav-links{
  display:flex;align-items:center;gap:2px;
  list-style:none;flex:1
}
.nav-links li{position:relative}
.nav-links a{
  display:flex;align-items:center;gap:4px;
  padding:8px 14px;border-radius:var(--radius);
  font-size:14px;color:var(--text-muted);
  transition:all .2s;font-weight:500
}
.nav-links a:hover{color:var(--primary);background:var(--primary-light)}
.nav-links a.active{color:var(--primary);background:var(--primary-light)}

/* dropdown arrow */
.nav-drop{position:relative}
.nav-drop>a{
  display:flex!important;align-items:center;gap:4px
}
.nav-drop>a::after{
  content:'';border:solid #666;border-width:0 1.5px 1.5px 0;
  padding:3px;transform:rotate(45deg);margin-top:-2px;
  transition:transform .2s
}
.nav-drop:hover>a::after{transform:rotate(-135deg);border-color:#ff6b00}

/* dropdown menu */
.dropdown-menu{
  position:absolute;top:calc(100% + 2px);left:0;
  min-width:180px;background:var(--dark2);
  border:1px solid var(--border);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:8px;
  display:none;z-index:100;
  opacity:0;transform:translateY(-8px) scale(.97);
  transition:opacity .2s,transform .2s
}
/* bridge gap between trigger and dropdown */
.nav-drop::after{
  content:'';position:absolute;left:0;right:0;top:100%;height:8px;background:transparent;pointer-events:none
}
.nav-drop:hover>.dropdown-menu,
.nav-drop.mobile-open>.dropdown-menu{
  display:block;
  opacity:1;transform:translateY(0) scale(1)
}
.dropdown-menu a{
  display:block;padding:10px 14px;border-radius:8px;
  font-size:14px;color:var(--text-muted);transition:all .2s
}
.dropdown-menu a:hover{background:var(--primary-light);color:var(--primary)}
.dropdown-menu a:first-child{border-radius:8px 8px 0 0}
.dropdown-menu a:last-child{border-radius:0 0 8px 8px}

/* CTA button */
.nav-cta{
  display:flex;align-items:center;padding:8px 18px;
  background:linear-gradient(135deg,#ff6b00,#e55c00);
  color:#fff;border-radius:var(--radius);
  font-size:14px;font-weight:600;white-space:nowrap;
  transition:all .2s;box-shadow:0 2px 8px rgba(255,107,0,.35);
  flex-shrink:0
}
.nav-cta:hover{transform:translateY(-1px);box-shadow:0 4px 14px rgba(255,107,0,.45)}

/* mobile toggle */
.menu-toggle{
  display:none;background:none;border:none;
  font-size:24px;cursor:pointer;color:var(--text);
  padding:4px;margin-left:auto;flex-shrink:0
}

/* ===== FOOTER ===== */
.footer{background:var(--dark);color:rgba(255,255,255,.6);padding:60px 0 0;margin-top:80px}
.footer-inner{max-width:var(--max);margin:0 auto;padding:0 20px;display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:48px}
.footer-logo{display:flex;align-items:center;gap:8px;font-size:18px;font-weight:700;color:#fff;margin-bottom:16px}
.footer-logo span{background:linear-gradient(135deg,#ff6b00,#ff8c00);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.footer-desc{font-size:14px;line-height:1.8;max-width:280px}
.footer-col h4{font-size:14px;font-weight:700;color:#fff;margin-bottom:16px;text-transform:uppercase;letter-spacing:.5px}
.footer-col a{display:block;font-size:14px;padding:5px 0;color:rgba(255,255,255,.6);transition:all .2s}
.footer-col a:hover{color:#fff;padding-left:4px}
.footer-bottom{max-width:var(--max);margin:48px auto 0;padding:20px;border-top:1px solid rgba(255,255,255,.08);text-align:center;font-size:13px}
.qq-float{position:fixed;top:50%;right:16px;transform:translateY(-50%);bottom:auto;width:64px;height:64px;border-radius:50%;background:linear-gradient(135deg,#ff6b00,#ff8c00);display:flex;align-items:center;justify-content:center;box-shadow:0 0 0 4px rgba(255,107,0,.2),0 4px 20px rgba(255,107,0,.5);transition:all .2s;z-index:999;animation:qq-pulse 2s infinite}
.qq-float:hover{transform:translateY(-50%) scale(1.12)}
@keyframes qq-pulse{0%,100%{box-shadow:0 0 0 2px rgba(255,107,0,.3),0 4px 20px rgba(255,107,0,.4)}50%{box-shadow:0 0 0 12px rgba(255,107,0,0),0 4px 40px rgba(255,107,0,.8)}}

/* ===== CARD (shared) ===== */
.card{background:#fff;border:1px solid #e2e8f0;border-radius:var(--radius);padding:24px;text-align:center;transition:all .2s}
.card:hover{border-color:var(--primary-light);transform:translateY(-2px)}
.card-icon{width:48px;height:48px;border-radius:12px;background:linear-gradient(135deg,#ff6b00,#e55c00);display:flex;align-items:center;justify-content:center;margin:0 auto 14px}
.card-icon svg{width:22px;height:22px;stroke:#fff}
.card h4{font-size:14px;font-weight:600;color:#0f172a;margin-bottom:6px}
.card p{font-size:13px;color:#475569}
.card-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}

/* ===== BUTTONS (shared) ===== */
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 32px;border-radius:12px;font-size:15px;font-weight:700;transition:all .2s}
.btn-primary{background:#fff;color:var(--primary);box-shadow:0 4px 14px rgba(0,0,0,.15)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,0,0,.2)}
.btn-secondary{background:rgba(255,255,255,.15);color:#fff;border:1.5px solid rgba(255,255,255,.3)}
.btn-secondary:hover{background:rgba(255,255,255,.25)}
.btn-orange{background:linear-gradient(135deg,#ff6b00,#e55c00);color:#fff;box-shadow:0 2px 8px rgba(255,107,0,.25)}
.btn-orange:hover{transform:translateY(-1px);box-shadow:0 4px 14px rgba(255,107,0,.35)}
.btn-outline{background:#f8fafc;color:var(--primary);border:1.5px solid #e2e8f0}
.btn-outline:hover{border-color:var(--primary);background:var(--primary-light)}

/* ===== FAQ (shared) ===== */
.faq-list{max-width:720px;margin:0 auto}
.faq-item{border:1px solid #e2e8f0;border-radius:var(--radius);margin-bottom:12px;overflow:hidden;background:#fff;box-shadow:0 1px 3px rgba(0,0,0,.06)}
.faq-q{display:flex;align-items:center;justify-content:space-between;padding:18px 24px;cursor:pointer;font-weight:600;font-size:15px;color:#0f172a;transition:all .2s;user-select:none}
.faq-q:hover{color:var(--primary);background:#fafafa}
.faq-q::after{content:'+';font-size:20px;color:#94a3b8;transition:transform .2s;flex-shrink:0}
.faq-item.open .faq-q::after{transform:rotate(45deg);color:var(--primary)}
.faq-a{display:none;padding:0 24px 18px;color:#475569;font-size:14px;line-height:1.8}
.faq-item.open .faq-a{display:block}

/* ===== CTA (shared) ===== */
.cta-box{background:linear-gradient(135deg,#ff6b00,#e55c00);border-radius:20px;padding:60px;text-align:center;color:#fff;position:relative;overflow:hidden}
.cta-box::before{content:'';position:absolute;inset:0;background:url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.06'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E") repeat}
.cta-box h2{position:relative;font-size:32px;font-weight:800;margin-bottom:12px}
.cta-box p{position:relative;font-size:16px;opacity:.9;margin-bottom:32px;max-width:500px;margin-left:auto;margin-right:auto}
.cta-box .btn-primary{background:#fff;color:var(--primary)}

/* ===== HERO SECTION (shared) ===== */
.hero-section{position:relative;padding:80px 0 60px;background:linear-gradient(135deg,#1a1a2e 0%,#16213e 50%,#0f3460 100%);overflow:hidden}
.hero-bg{position:absolute;inset:0;pointer-events:none}
.hero-shape{position:absolute;border-radius:50%;filter:blur(80px);opacity:.4}
.shape-1{width:500px;height:500px;background:#2563eb;top:-150px;right:-100px}
.shape-2{width:400px;height:400px;background:#7c3aed;bottom:-100px;left:-80px}
.shape-3{width:300px;height:300px;background:#059669;top:50%;left:50%;transform:translate(-50%,-50%)}
.hero-content{position:relative;z-index:2;text-align:center;max-width:700px;margin:0 auto 48px}
.hero-badge{display:inline-block;background:rgba(255,107,0,.15);color:#ff9f43;border:1px solid rgba(255,107,0,.3);padding:6px 18px;border-radius:20px;font-size:13px;font-weight:600;margin-bottom:20px}
.hero-content h1{font-size:52px;font-weight:800;color:#fff;line-height:1.15;margin-bottom:16px;letter-spacing:-1.5px}
.hero-sub{font-size:18px;color:rgba(255,255,255,.7);margin-bottom:32px;line-height:1.7}
.hero-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.hero-actions .btn-outline{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.4)}
.hero-actions .btn-outline:hover{border-color:#fff;background:rgba(255,255,255,.1)}
.btn-lg{padding:14px 32px;font-size:16px;border-radius:10px;font-weight:600}
.hero-stats{display:flex;justify-content:center;gap:48px;position:relative;z-index:2}
.stat-item{text-align:center}
.stat-item strong{display:block;font-size:28px;font-weight:800;color:#fff;margin-bottom:4px}
.stat-item span{font-size:13px;color:rgba(255,255,255,.55)}

@media(max-width:768px){
  .hero-section{padding:60px 0 40px}
  .hero-content h1{font-size:32px}
  .hero-sub{font-size:15px}
  .hero-stats{gap:24px;flex-wrap:wrap}
  .stat-item strong{font-size:22px}
}

@media(max-width:1024px){
  .grid-4,.card-grid{grid-template-columns:repeat(2,1fr)}
  .footer-inner{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  .hero-section{padding:60px 0 40px}
  .hero-content h1{font-size:32px}
  .hero-sub{font-size:15px}
  .hero-stats{gap:24px;flex-wrap:wrap}
  .stat-item strong{font-size:22px}
  .grid-4,.card-grid{grid-template-columns:1fr}
  .section{padding:48px 0}
  .menu-toggle{display:block}
  .nav-links{
    display:none;position:absolute;top:100%;left:0;right:0;
    background:var(--dark);border-bottom:1px solid var(--border);
    flex-direction:column;padding:12px;gap:2px;
    box-shadow:0 8px 24px rgba(0,0,0,.3)
  }
  .nav-links.mobile-open{display:flex}
  .nav-links li{width:100%}
  .nav-links a{padding:12px 16px;color:var(--text-muted);border-radius:8px}
  .nav-links a:hover{color:var(--primary);background:var(--primary-light)}
  .dropdown-menu{
    position:static;box-shadow:none;padding:0 0 0 16px;
    border:none;visibility:visible;height:0;overflow:hidden;
    background:transparent;opacity:1;transform:none;display:none
  }
  .nav-drop.mobile-open>.dropdown-menu{display:block;height:auto}
  .dropdown-menu a{padding:10px 16px;color:var(--text-muted)}
  .nav-cta{display:none}
  .cta-box{padding:36px 24px}
}
@media(max-width:480px){.nav-inner{padding:0 16px}}