/* ChatDash Solution Landing Page — Premium CSS */
*{margin:0;padding:0;box-sizing:border-box}
:root{--primary:#114473;--primary-dark:#0c3357;--accent:#16625d;--text:#0f172a;--text-light:#64748b;--bg:#ffffff;--bg-alt:#f8fafc;--bg-dark:#0f172a;--border:#e2e8f0;--radius:1rem;--shadow:0 4px 24px rgba(15,23,42,0.08)}
html{scroll-behavior:smooth}
body{font-family:'Inter',system-ui,-apple-system,sans-serif;color:var(--text);line-height:1.7;background:var(--bg);overflow-x:hidden}

/* Reveal animation */
.reveal{opacity:0;transform:translateY(30px);transition:opacity .7s ease,transform .7s ease}
.reveal.revealed{opacity:1;transform:translateY(0)}

/* Container */
.container{max-width:1200px;margin:0 auto;padding:0 1.5rem}

/* Nav */
.nav{position:fixed;top:0;left:0;right:0;z-index:999;padding:.85rem 0;transition:all .35s ease}
.nav.scrolled{background:rgba(255,255,255,.92);backdrop-filter:blur(20px);border-bottom:1px solid var(--border);box-shadow:0 2px 20px rgba(0,0,0,.06)}
.nav-container{max-width:1200px;margin:0 auto;padding:0 1.5rem;display:flex;justify-content:space-between;align-items:center}
.nav-brand{display:flex;align-items:center;gap:.6rem;text-decoration:none;font-size:1.15rem;font-weight:800;color:var(--text)}
.nav-logo{width:36px;height:36px;background:linear-gradient(135deg,var(--primary),var(--accent));border-radius:10px;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 14px rgba(17,68,115,.3)}
.nav-links{display:flex;gap:.25rem;align-items:center}
.nav-links a{padding:.55rem .9rem;border-radius:999px;text-decoration:none;font-size:.85rem;font-weight:600;color:var(--text-light);transition:all .25s}
.nav-links a:hover{color:var(--primary);background:rgba(17,68,115,.06)}
.nav-cta{background:linear-gradient(135deg,var(--primary),var(--accent))!important;color:#fff!important;box-shadow:0 4px 14px rgba(17,68,115,.25)}
.nav-cta:hover{transform:translateY(-2px)!important;box-shadow:0 6px 20px rgba(17,68,115,.35)!important}
.nav-toggle{display:none;background:none;border:none;font-size:1.5rem;cursor:pointer;color:var(--text)}
@media(max-width:768px){
    .nav-links{display:none;position:absolute;top:100%;left:0;right:0;background:white;flex-direction:column;padding:1rem;box-shadow:var(--shadow);border-radius:0 0 1rem 1rem}
    .nav-links.open{display:flex}
    .nav-toggle{display:block}
}

/* Hero */
.hero{position:relative;padding:8rem 0 4rem;overflow:hidden;background:linear-gradient(160deg,#f8fafc 0%,#eef2ff 40%,#e0e7ff 100%);min-height:100vh;display:flex;align-items:center}
.hero-bg-shapes{position:absolute;inset:0;pointer-events:none;overflow:hidden}
.shape{position:absolute;border-radius:50%;filter:blur(80px);opacity:.35}
.shape-1{width:600px;height:600px;top:-200px;right:-100px;background:linear-gradient(135deg,#5f8db3,#79a7c9)}
.shape-2{width:400px;height:400px;bottom:-100px;left:-80px;background:linear-gradient(135deg,#06b6d4,#3b82f6)}
.shape-3{width:300px;height:300px;top:40%;left:50%;background:linear-gradient(135deg,#f472b6,#fb923c);opacity:.2}
.hero-container{max-width:1200px;margin:0 auto;padding:0 1.5rem;display:grid;grid-template-columns:1fr 1fr;gap:4rem;align-items:center;position:relative;z-index:1}
.hero-badge{display:inline-block;padding:.45rem 1rem;border-radius:999px;font-size:.78rem;font-weight:700;background:rgba(17,68,115,.1);color:var(--primary);border:1px solid rgba(17,68,115,.2);margin-bottom:1.5rem;animation:float 3s ease-in-out infinite}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-6px)}}
.hero-title{font-size:clamp(2rem,5vw,3.2rem);font-weight:900;line-height:1.15;color:var(--text);margin-bottom:1.25rem;letter-spacing:-.02em}
.gradient-text{background:linear-gradient(135deg,var(--primary),var(--accent),#ec4899);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-desc{font-size:1.1rem;color:var(--text-light);max-width:540px;margin-bottom:2rem;line-height:1.8}
.hero-actions{display:flex;gap:1rem;flex-wrap:wrap;margin-bottom:2.5rem}
.btn-primary-lg{display:inline-flex;align-items:center;gap:.5rem;padding:.9rem 2rem;border-radius:999px;font-size:.95rem;font-weight:700;text-decoration:none;color:#fff;background:linear-gradient(135deg,var(--primary),var(--accent));box-shadow:0 6px 20px rgba(17,68,115,.3);transition:all .3s}
.btn-primary-lg:hover{transform:translateY(-3px);box-shadow:0 10px 30px rgba(17,68,115,.4)}
.btn-outline-lg{display:inline-flex;align-items:center;gap:.5rem;padding:.9rem 2rem;border-radius:999px;font-size:.95rem;font-weight:700;text-decoration:none;color:var(--text);border:2px solid var(--border);transition:all .3s}
.btn-outline-lg:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-3px)}
.btn-outline-lg.light{color:#fff;border-color:rgba(255,255,255,.4)}
.btn-outline-lg.light:hover{border-color:#fff;background:rgba(255,255,255,.1)}
.hero-stats{display:flex;gap:1.5rem;align-items:center}
.hero-stat{display:flex;flex-direction:column;gap:.15rem}
.hero-stat-num{font-size:1.3rem;font-weight:800;color:var(--primary)}
.hero-stat-label{font-size:.72rem;color:var(--text-light);font-weight:600;text-transform:uppercase;letter-spacing:.05em}
.hero-stat-divider{width:1px;height:36px;background:var(--border)}
.hero-visual{position:relative}
.hero-mockup{position:relative;border-radius:1.25rem;overflow:hidden;box-shadow:0 30px 60px rgba(15,23,42,.15),0 0 0 1px rgba(148,163,184,.15)}
.hero-mockup img{width:100%;display:block;border-radius:1.25rem}
.mockup-glow{position:absolute;inset:-2px;border-radius:1.4rem;background:linear-gradient(135deg,rgba(17,68,115,.3),rgba(22,98,93,.2),rgba(236,72,153,.15));z-index:-1;filter:blur(20px)}
@media(max-width:900px){.hero-container{grid-template-columns:1fr;text-align:center}.hero-desc{margin:0 auto 2rem}.hero-actions,.hero-stats{justify-content:center}.hero-visual{margin-top:2rem}}

/* Trusted */
.trusted{padding:3rem 0;background:var(--bg);border-bottom:1px solid var(--border)}
.trusted-label{text-align:center;font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.1em;color:var(--text-light);margin-bottom:1.25rem}
.trusted-logos{display:flex;flex-wrap:wrap;justify-content:center;gap:.75rem}
.trusted-item{padding:.5rem 1rem;border-radius:999px;font-size:.78rem;font-weight:600;color:var(--text-light);background:var(--bg-alt);border:1px solid var(--border)}

/* Section headers */
.section-header{text-align:center;margin-bottom:3.5rem}
.section-badge{display:inline-block;padding:.4rem .9rem;border-radius:999px;font-size:.76rem;font-weight:700;background:rgba(17,68,115,.08);color:var(--primary);margin-bottom:1rem}
.section-title{font-size:clamp(1.5rem,3.5vw,2.4rem);font-weight:900;color:var(--text);margin-bottom:.75rem;letter-spacing:-.01em}
.section-desc{font-size:1.05rem;color:var(--text-light);max-width:600px;margin:0 auto}

/* Features grid */
.features{padding:5rem 0;background:var(--bg-alt)}
.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:1.5rem}
.feature-card{padding:2rem 1.75rem;border-radius:var(--radius);background:var(--bg);border:1px solid var(--border);box-shadow:var(--shadow);transition:all .35s;cursor:default}
.feature-card:hover{transform:translateY(-6px);box-shadow:0 16px 40px rgba(15,23,42,.12);border-color:rgba(17,68,115,.2)}
.feature-icon{width:52px;height:52px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:1.5rem;margin-bottom:1.25rem;color:#fff}
.feature-card h3{font-size:1.1rem;font-weight:800;margin-bottom:.5rem;color:var(--text)}
.feature-card p{font-size:.88rem;color:var(--text-light);line-height:1.7}

/* Module sections */
.module{padding:5rem 0}
.module-dark{background:var(--bg-alt)}
.module-grid{display:grid;grid-template-columns:1fr 1fr;gap:4rem;align-items:center}
.module-grid.reverse{direction:rtl}
.module-grid.reverse > *{direction:ltr}
.module-badge{display:inline-block;padding:.35rem .8rem;border-radius:999px;font-size:.7rem;font-weight:700;background:rgba(17,68,115,.1);color:var(--primary);margin-bottom:1rem;text-transform:uppercase;letter-spacing:.05em}
.module-badge.ai{background:rgba(6,182,212,.1);color:#0891b2}
.module-badge.sales{background:rgba(16,185,129,.1);color:#059669}
.module-title{font-size:clamp(1.4rem,3vw,2rem);font-weight:900;margin-bottom:1rem;color:var(--text)}
.module-desc{font-size:.95rem;color:var(--text-light);margin-bottom:1.5rem;line-height:1.8}
.module-list{list-style:none;display:flex;flex-direction:column;gap:.65rem}
.module-list li{font-size:.88rem;color:var(--text);display:flex;align-items:flex-start;gap:.5rem}
.check{flex-shrink:0}
.module-visual{position:relative}
.module-visual img{width:100%;border-radius:var(--radius);box-shadow:0 20px 50px rgba(15,23,42,.12),0 0 0 1px rgba(148,163,184,.12)}
@media(max-width:900px){.module-grid,.module-grid.reverse{grid-template-columns:1fr;direction:ltr;gap:2rem}}

/* Intent cards */
.intent-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:.75rem;margin-bottom:1.5rem}
.intent-card{padding:1rem;border-radius:.85rem;text-align:center;border:1px solid var(--border);transition:all .3s}
.intent-card span{font-size:1.5rem;display:block;margin-bottom:.35rem}
.intent-card strong{font-size:.7rem;letter-spacing:.05em;display:block;margin-bottom:.3rem}
.intent-card p{font-size:.68rem;color:var(--text-light);line-height:1.4}
.intent-card.tu-van{background:rgba(17,68,115,.05);border-color:rgba(17,68,115,.15)}
.intent-card.tu-van strong{color:var(--primary)}
.intent-card.dich-vu{background:rgba(6,182,212,.05);border-color:rgba(6,182,212,.15)}
.intent-card.dich-vu strong{color:#0891b2}
.intent-card.ngoai-luong{background:rgba(148,163,184,.05);border-color:rgba(148,163,184,.2)}
.intent-card.ngoai-luong strong{color:var(--text-light)}
.intent-card:hover{transform:translateY(-3px);box-shadow:0 6px 16px rgba(0,0,0,.06)}
@media(max-width:640px){.intent-cards{grid-template-columns:1fr}}

/* Pipeline demo */
.pipeline-demo{display:flex;align-items:center;gap:.35rem;flex-wrap:wrap;margin-bottom:1.5rem;padding:1rem;background:var(--bg);border-radius:.85rem;border:1px solid var(--border)}
.pipe-step{padding:.4rem .75rem;border-radius:999px;font-size:.7rem;font-weight:700;color:#fff;background:var(--clr);white-space:nowrap}
.pipe-step.won{box-shadow:0 0 12px rgba(5,150,105,.3)}
.pipe-arrow{color:var(--text-light);font-size:.75rem}

/* Channels */
.channels{padding:5rem 0;background:var(--bg)}
.channels-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.5rem}
.channel-card{padding:2rem;border-radius:var(--radius);border:1px solid var(--border);box-shadow:var(--shadow);transition:all .35s;position:relative;overflow:hidden}
.channel-card::before{content:'';position:absolute;top:0;left:0;right:0;height:4px}
.channel-card.facebook::before{background:linear-gradient(90deg,#1877f2,#42a5f5)}
.channel-card.zalo::before{background:linear-gradient(90deg,#0084ff,#00c2ff)}
.channel-card.web::before{background:linear-gradient(90deg,#10b981,#34d399)}
.channel-card:hover{transform:translateY(-4px);box-shadow:0 16px 40px rgba(15,23,42,.1)}
.channel-icon{font-size:2rem;margin-bottom:1rem}
.channel-card h3{font-size:1.05rem;font-weight:800;margin-bottom:.75rem;color:var(--text)}
.channel-card ul{list-style:none;display:flex;flex-direction:column;gap:.4rem}
.channel-card li{font-size:.82rem;color:var(--text-light);padding-left:1.2rem;position:relative}
.channel-card li::before{content:'✓';position:absolute;left:0;color:var(--primary);font-weight:700}

/* Architecture */
.arch{padding:5rem 0;background:var(--bg-alt)}
.tech-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:1rem}
.tech-item{padding:1.25rem;border-radius:.85rem;background:var(--bg);border:1px solid var(--border);text-align:center;transition:all .3s}
.tech-item:hover{transform:translateY(-3px);box-shadow:0 8px 20px rgba(0,0,0,.06)}
.tech-badge{display:inline-block;padding:.2rem .6rem;border-radius:999px;font-size:.6rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;background:rgba(17,68,115,.08);color:var(--primary);margin-bottom:.6rem}
.tech-item span{display:block;font-size:.82rem;font-weight:600;color:var(--text)}

/* CTA */
.cta{padding:5rem 0;background:linear-gradient(135deg,#0f172a 0%,#1e1b4b 50%,#312e81 100%);position:relative;overflow:hidden}
.cta::before{content:'';position:absolute;width:500px;height:500px;border-radius:50%;background:radial-gradient(circle,rgba(17,68,115,.2),transparent 70%);top:-200px;right:-100px}
.cta-content{text-align:center;position:relative;z-index:1}
.cta-content h2{font-size:clamp(1.5rem,4vw,2.5rem);font-weight:900;color:#fff;margin-bottom:1rem;line-height:1.2}
.cta-content p{font-size:1.05rem;color:rgba(255,255,255,.7);margin-bottom:2rem;max-width:500px;margin-left:auto;margin-right:auto}
.cta-actions{display:flex;justify-content:center;gap:1rem;flex-wrap:wrap;margin-bottom:2rem}
.cta-contact{display:flex;justify-content:center;gap:2rem;flex-wrap:wrap}
.cta-contact span{font-size:.85rem;color:rgba(255,255,255,.5)}

/* Footer */
.footer{padding:2rem 0;background:#0a0f1d;border-top:1px solid rgba(255,255,255,.05)}
.footer-content{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:1rem}
.footer-brand{display:flex;align-items:center;gap:.5rem;color:#fff;font-weight:800;font-size:.95rem}
.footer p{font-size:.78rem;color:rgba(255,255,255,.4)}

/* Dải lĩnh vực — liên kết từ trang giải pháp sang các trang đích theo ngành. */
.sol-industries{display:grid;grid-template-columns:repeat(auto-fit,minmax(215px,1fr));gap:.9rem}
.sol-industry{display:flex;flex-direction:column;gap:.2rem;padding:1.05rem 1.2rem;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);text-decoration:none;transition:transform .25s,box-shadow .25s,border-color .25s}
.sol-industry:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--primary)}
.sol-industry span{font-size:1.5rem;line-height:1}
.sol-industry b{font-size:.94rem;font-weight:800;color:var(--text)}
.sol-industry small{font-size:.76rem;color:var(--text-light);font-variant-numeric:tabular-nums}