/* ============================================================
   expogent.com — Landing CSS
   Design tokens inherited from YunlaiAI system (deep-space/cyan),
   tuned for B2B international: calmer, more restrained.
   ============================================================ */
:root{
  --bg:#04070f;
  --bg-2:#070c18;
  --panel:rgba(13,20,38,.72);
  --panel-2:rgba(10,16,32,.55);
  --line:rgba(94,140,255,.14);
  --line-strong:rgba(94,200,255,.35);
  --txt:#eaf2ff;
  --txt-2:#93a4c8;
  --txt-3:#5d6f96;
  --cyan:#22d3ee;
  --blue:#3b82f6;
  --magenta:#d946ef;
  --violet:#8b5cf6;
  --grad:linear-gradient(92deg,#22d3ee 0%,#60a5fa 45%,#d946ef 100%);
  --grad-soft:linear-gradient(92deg,rgba(34,211,238,.18),rgba(217,70,239,.18));
  --radius:18px;
  --header-h:68px;
  --font:"Inter","SF Pro Display","PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--header-h) + 12px)}
body{
  background:var(--bg);color:var(--txt);font-family:var(--font);
  font-size:16px;line-height:1.6;overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
::selection{background:rgba(34,211,238,.35);color:#fff}
img,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
input{font-family:inherit}
.container{width:min(1200px,calc(100% - 40px));margin-inline:auto}

/* ---------- background layers ---------- */
.bg-grid{
  position:fixed;inset:0;z-index:-3;pointer-events:none;
  background-image:
    linear-gradient(rgba(80,140,255,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(80,140,255,.05) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(ellipse 90% 70% at 50% 0%,#000 30%,transparent 75%);
  -webkit-mask-image:radial-gradient(ellipse 90% 70% at 50% 0%,#000 30%,transparent 75%);
}
.bg-glow{position:fixed;z-index:-2;pointer-events:none;filter:blur(120px);opacity:.4}
.bg-glow-1{width:52vw;height:42vw;top:-14vw;left:-10vw;background:radial-gradient(closest-side,rgba(37,99,235,.35),transparent)}
.bg-glow-2{width:46vw;height:40vw;top:6vh;right:-14vw;background:radial-gradient(closest-side,rgba(168,46,219,.25),transparent)}

/* ---------- shared ---------- */
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.section{padding:96px 0}
.section-kicker{
  font-size:.78rem;letter-spacing:.22em;text-transform:uppercase;color:var(--cyan);
  margin-bottom:14px;font-weight:600;
}
.section-title{font-size:clamp(1.7rem,3.6vw,2.6rem);font-weight:800;line-height:1.22;letter-spacing:-.01em}
.section-sub{color:var(--txt-2);margin-top:14px;max-width:660px;font-size:.98rem}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:12px;font-weight:600;font-size:.95rem;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,border-color .18s;
  white-space:nowrap;
}
.btn-primary{
  background:var(--grad);color:#04070f;
  box-shadow:0 8px 30px rgba(34,211,238,.25);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 36px rgba(34,211,238,.35)}
.btn-ghost{
  border:1px solid var(--line-strong);color:var(--txt);background:rgba(13,20,38,.4);
}
.btn-ghost:hover{border-color:var(--cyan);transform:translateY(-2px)}

/* ---------- header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:50;height:var(--header-h);
  display:flex;align-items:center;
  background:rgba(4,7,15,.65);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;transition:border-color .25s,background .25s;
}
.site-header.scrolled{border-bottom-color:var(--line);background:rgba(4,7,15,.85)}
.header-inner{position:relative;display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:flex;align-items:center;gap:10px}
.brand-icon{width:36px;height:36px;border-radius:9px}
.brand-name{font-size:1.18rem;font-weight:800;letter-spacing:.01em}
.main-nav{display:flex;gap:28px;font-size:.92rem;color:var(--txt-2)}
.main-nav a:hover{color:var(--txt)}
.header-actions{display:flex;align-items:center;gap:12px}
.menu-toggle{display:none;flex-direction:column;align-items:center;justify-content:center;gap:5px;width:40px;height:40px;margin-right:-4px;padding:0}
.menu-toggle span{display:block;width:22px;height:2px;background:var(--txt);border-radius:2px;transition:transform .2s}
.mobile-menu{
  position:absolute;top:100%;left:0;right:0;display:none;flex-direction:column;gap:4px;
  padding:10px 20px 22px;width:auto;margin:0;
  background:rgba(6,10,20,.97);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);box-shadow:0 22px 40px rgba(0,0,0,.45);
  animation:menu-drop .18s ease;
}
@keyframes menu-drop{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:none}}

/* ---------- hero ---------- */
.hero{padding:calc(var(--header-h) + 90px) 0 90px;text-align:center}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;padding:7px 16px;border-radius:999px;
  border:1px solid var(--line-strong);background:rgba(13,20,38,.5);
  font-size:.82rem;color:var(--txt-2);margin-bottom:26px;
}
.hero-badge .dot{width:7px;height:7px;border-radius:50%;background:var(--cyan);box-shadow:0 0 10px var(--cyan)}
.hero h1{font-size:clamp(2.1rem,5.2vw,3.6rem);font-weight:850;line-height:1.14;letter-spacing:-.02em;max-width:900px;margin-inline:auto}
.hero-sub{margin:22px auto 0;max-width:680px;color:var(--txt-2);font-size:1.06rem}
.hero-cta{display:flex;gap:14px;justify-content:center;margin-top:38px;flex-wrap:wrap}
.hero-note{margin-top:14px;font-size:.82rem;color:var(--txt-3)}
.channels{
  display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:46px;
}
.channel{
  display:inline-flex;align-items:center;gap:8px;padding:9px 16px;border-radius:999px;
  border:1px solid var(--line);background:var(--panel-2);font-size:.85rem;color:var(--txt-2);
}
.channel svg{width:15px;height:15px;stroke:var(--cyan)}

/* ---------- loop ---------- */
.loop-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:54px}
.loop-card{
  position:relative;padding:28px 24px 26px;border-radius:var(--radius);
  border:1px solid var(--line);background:var(--panel);
  transition:transform .2s ease,border-color .2s;
  overflow:hidden;
}
.loop-card:hover{transform:translateY(-4px);border-color:var(--line-strong)}
.loop-step{
  font-size:.72rem;letter-spacing:.18em;color:var(--txt-3);font-weight:700;margin-bottom:14px;
}
.loop-card .ico{
  width:42px;height:42px;border-radius:11px;display:flex;align-items:center;justify-content:center;
  background:var(--grad-soft);border:1px solid var(--line);margin-bottom:16px;
}
.loop-card .ico svg{width:21px;height:21px;stroke:var(--cyan);fill:none;stroke-width:1.8}
.loop-card h3{font-size:1.08rem;font-weight:750;margin-bottom:8px}
.loop-card p{font-size:.88rem;color:var(--txt-2)}
.loop-flag{
  position:absolute;top:14px;right:14px;font-size:.66rem;font-weight:700;letter-spacing:.08em;
  color:var(--cyan);border:1px solid rgba(34,211,238,.4);border-radius:999px;padding:3px 9px;
  background:rgba(34,211,238,.08);
}

/* ---------- differentiators ---------- */
.diff-wrap{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;margin-top:50px}
.diff-list{display:flex;flex-direction:column;gap:26px}
.diff-item{display:flex;gap:16px}
.diff-item .ico{
  flex:0 0 44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  background:var(--grad-soft);border:1px solid var(--line);
}
.diff-item .ico svg{width:22px;height:22px;stroke:var(--cyan);fill:none;stroke-width:1.8}
.diff-item h3{font-size:1.05rem;font-weight:750;margin-bottom:5px}
.diff-item p{font-size:.9rem;color:var(--txt-2)}
.diff-panel{
  border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);
  padding:34px 30px;
}
.diff-panel h3{font-size:1.02rem;font-weight:750;margin-bottom:18px;color:var(--txt-2)}
.cmp{width:100%;border-collapse:collapse;font-size:.86rem}
.cmp th{
  text-align:left;padding:10px 8px;border-bottom:1px solid var(--line-strong);
  color:var(--txt);font-weight:700;white-space:nowrap;
}
.cmp td{padding:11px 8px;border-bottom:1px solid var(--line);color:var(--txt-2);vertical-align:top}
.cmp tr:last-child td{border-bottom:none}
.cmp .yes{color:var(--cyan);font-weight:700}
.cmp .no{color:var(--txt-3)}

/* ---------- pricing ---------- */
.price-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:50px}
.price-card{
  position:relative;display:flex;flex-direction:column;gap:14px;
  border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);padding:28px 22px;
}
.price-card.hot{border-color:rgba(34,211,238,.55);box-shadow:0 12px 44px rgba(34,211,238,.12)}
.price-tag{
  position:absolute;top:-11px;left:50%;transform:translateX(-50%);
  background:var(--grad);color:#04070f;font-size:.68rem;font-weight:800;letter-spacing:.08em;
  border-radius:999px;padding:4px 14px;white-space:nowrap;
}
.price-name{font-size:.95rem;font-weight:750}
.price-num{font-size:2rem;font-weight:850;letter-spacing:-.02em}
.price-num small{font-size:.82rem;color:var(--txt-3);font-weight:500}
.price-desc{font-size:.8rem;color:var(--txt-3);min-height:34px}
.price-feats{list-style:none;display:flex;flex-direction:column;gap:9px;font-size:.85rem;color:var(--txt-2);flex:1}
.price-feats li{display:flex;gap:8px;align-items:flex-start}
.price-feats li::before{content:"✓";color:var(--cyan);font-weight:800;flex:0 0 auto}
.price-note{text-align:center;margin-top:26px;font-size:.84rem;color:var(--txt-3)}

/* ---------- waitlist ---------- */
.wait-wrap{
  border:1px solid var(--line-strong);border-radius:24px;
  background:linear-gradient(180deg,rgba(13,20,38,.85),rgba(7,12,24,.85));
  padding:64px 40px;text-align:center;position:relative;overflow:hidden;
}
.wait-wrap::before{
  content:"";position:absolute;inset:-40% -10% auto;height:80%;z-index:-1;
  background:radial-gradient(60% 60% at 50% 0%,rgba(34,211,238,.14),transparent 70%);
}
.wait-wrap h2{font-size:clamp(1.5rem,3vw,2.1rem);font-weight:800}
.wait-wrap p{color:var(--txt-2);max-width:560px;margin:14px auto 30px;font-size:.95rem}
.wait-form{display:flex;gap:12px;justify-content:center;max-width:560px;margin:0 auto;flex-wrap:wrap}
.wait-form input{
  flex:1;min-width:240px;padding:14px 18px;border-radius:12px;
  border:1px solid var(--line-strong);background:rgba(4,7,15,.6);color:var(--txt);
  font-size:.95rem;outline:none;transition:border-color .2s;
}
.wait-form input:focus{border-color:var(--cyan)}
.wait-form .btn{flex:0 0 auto}
.wait-msg{margin-top:16px;font-size:.9rem;min-height:24px}
.wait-msg.ok{color:var(--cyan)}
.wait-msg.err{color:#f87171}
.wait-privacy{margin-top:10px;font-size:.75rem;color:var(--txt-3)}

/* ---------- footer ---------- */
.site-footer{
  border-top:1px solid var(--line);padding:42px 0 34px;margin-top:40px;
}
.footer-inner{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap;align-items:center}
.footer-links{display:flex;gap:22px;font-size:.85rem;color:var(--txt-2)}
.footer-links a:hover{color:var(--txt)}
.footer-copy{font-size:.8rem;color:var(--txt-3)}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .loop-grid{grid-template-columns:repeat(2,1fr)}
  .price-grid{grid-template-columns:repeat(2,1fr)}
  .diff-wrap{grid-template-columns:1fr;gap:40px}
}
@media (max-width:767px){
  .main-nav{display:none}
  .menu-toggle{display:flex}
  .header-actions .btn-ghost{display:none}
  .mobile-menu{
    display:none;flex-direction:column;gap:4px;padding:10px 20px 22px;
  }
  .mobile-menu.open{display:flex}
  .mobile-menu a{padding:12px 6px;font-size:.95rem;color:var(--txt-2);border-bottom:1px solid var(--line)}
  .mobile-menu-btns{display:flex;gap:10px;margin-top:14px}
  .section{padding:64px 0}
  .hero{padding:calc(var(--header-h) + 56px) 0 60px}
  .loop-grid{grid-template-columns:1fr}
  .price-grid{grid-template-columns:1fr}
  .wait-wrap{padding:44px 22px}
}