:root{
  --bg:#f7f9fc;--surface:#fff;--ink:#0f172a;--muted:#64748b;--line:#e8edf5;
  --brand:#1769ff;--brand-2:#5b8cff;--brand-soft:#eef5ff;--navy:#0b1f3a;
  --green:#12b981;--orange:#ff9d2e;--violet:#7c5cff;--cyan:#24b7c9;
  --shadow:0 20px 70px rgba(27,54,100,.10);--shadow-sm:0 10px 35px rgba(27,54,100,.08);
  --radius:26px;--radius-sm:18px;--container:1180px;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--surface);color:var(--ink);font-family:Inter,"Be Vietnam Pro",system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;-webkit-font-smoothing:antialiased}a{text-decoration:none;color:inherit}button,input,select,textarea{font:inherit}img{max-width:100%;display:block}.container{width:min(calc(100% - 40px),var(--container));margin:auto}.section{padding:100px 0}.section-soft{background:var(--bg)}.section-dark{background:linear-gradient(135deg,#07162c 0%,#0d2750 100%);color:#fff;position:relative;overflow:hidden}.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--brand);font-size:12px;font-weight:800;letter-spacing:.14em;text-transform:uppercase;margin-bottom:18px}.eyebrow:before{content:"";width:24px;height:2px;background:currentColor;border-radius:9px}.section-dark .eyebrow{color:#8eb7ff}.section-title{font-size:clamp(32px,4vw,52px);line-height:1.08;letter-spacing:-.045em;margin:0 0 18px;max-width:760px}.section-copy{font-size:17px;line-height:1.8;color:var(--muted);max-width:700px;margin:0}.section-dark .section-copy{color:#b8c8df}.header{height:78px;position:sticky;top:0;z-index:50;background:rgba(255,255,255,.88);backdrop-filter:blur(18px);border-bottom:1px solid rgba(232,237,245,.85)}.nav{height:100%;display:flex;align-items:center;justify-content:space-between;gap:30px}.brand{display:flex;align-items:center;gap:11px;font-size:21px;font-weight:800;letter-spacing:-.04em}.brand-mark{width:39px;height:39px;border-radius:13px;display:grid;place-items:center;background:linear-gradient(145deg,var(--brand),#69a1ff);color:#fff;box-shadow:0 10px 25px rgba(23,105,255,.25);font-size:15px;letter-spacing:-.05em}.brand small{display:block;color:var(--muted);font-size:9px;letter-spacing:.08em;text-transform:uppercase;font-weight:700;margin-top:1px}.nav-links{display:flex;align-items:center;gap:7px}.nav-link{padding:10px 12px;border-radius:11px;color:#334155;font-size:14px;font-weight:600}.nav-link:hover,.nav-link.active{color:var(--brand);background:var(--brand-soft)}.nav-item{position:relative}.dropdown{position:absolute;top:calc(100% + 12px);left:-18px;width:230px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:9px;box-shadow:var(--shadow);opacity:0;visibility:hidden;transform:translateY(-8px);transition:.2s}.nav-item:hover .dropdown{opacity:1;visibility:visible;transform:none}.dropdown a{display:block;padding:11px 12px;border-radius:10px;color:#334155;font-size:14px;font-weight:600}.dropdown a:hover{background:var(--brand-soft);color:var(--brand)}.nav-actions{display:flex;align-items:center;gap:10px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:46px;padding:0 19px;border-radius:13px;border:1px solid transparent;font-weight:700;font-size:14px;cursor:pointer;transition:.2s}.btn-primary{background:var(--brand);color:#fff;box-shadow:0 12px 28px rgba(23,105,255,.22)}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 32px rgba(23,105,255,.3)}.btn-secondary{background:#fff;border-color:var(--line);color:#1f2937}.btn-secondary:hover{border-color:#cbd7ea;background:#fbfdff}.btn-white{background:#fff;color:#153768}.btn-ghost{background:transparent;border-color:rgba(255,255,255,.18);color:#fff}.menu-btn{display:none;width:44px;height:44px;border:1px solid var(--line);background:#fff;border-radius:12px;place-items:center;cursor:pointer}.hero{padding:74px 0 90px;overflow:hidden;background:radial-gradient(circle at 76% 15%,#eaf3ff 0%,rgba(234,243,255,0) 30%),linear-gradient(#fff,#fbfdff)}.hero-grid{display:grid;grid-template-columns:1.02fr .98fr;align-items:center;gap:58px}.hero h1{font-size:clamp(48px,6vw,76px);line-height:.98;letter-spacing:-.06em;margin:0 0 26px;max-width:700px}.hero h1 span{color:var(--brand)}.hero-copy{font-size:18px;line-height:1.75;color:var(--muted);max-width:650px}.hero-actions{display:flex;gap:12px;margin-top:32px}.hero-trust{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:28px;color:#526174;font-size:13px;font-weight:600}.hero-trust span:before{content:"✓";display:inline-grid;place-items:center;width:18px;height:18px;margin-right:7px;border-radius:50%;background:#eafaf4;color:#0c9a69;font-size:11px}.hero-visual{position:relative;min-height:535px}.hero-glow{position:absolute;width:460px;height:460px;border-radius:50%;background:linear-gradient(145deg,#e8f1ff,#f4f8ff);right:0;top:30px}.dashboard-shell{position:absolute;inset:40px 0 30px 25px;background:#fff;border:1px solid #e4ebf5;border-radius:30px;box-shadow:0 40px 100px rgba(27,66,130,.17);padding:22px;transform:rotate(1.3deg)}.dashboard-top{display:flex;align-items:center;justify-content:space-between;padding-bottom:18px;border-bottom:1px solid var(--line)}.dots{display:flex;gap:6px}.dots i{width:8px;height:8px;border-radius:50%;background:#dfe6f2}.status-pill{font-size:11px;font-weight:800;color:#087b58;background:#eafaf4;border-radius:999px;padding:7px 10px}.dashboard-body{display:grid;grid-template-columns:110px 1fr;gap:18px;padding-top:18px}.mini-side{background:#f7f9fc;border-radius:18px;padding:14px 10px}.mini-side span{display:block;height:8px;border-radius:99px;background:#dfe7f3;margin:12px 0}.mini-side span:first-child{background:#8db6ff}.channel-stack{display:grid;gap:12px}.channel-card{display:grid;grid-template-columns:46px 1fr auto;align-items:center;gap:12px;padding:15px;border:1px solid var(--line);border-radius:18px;background:#fff;box-shadow:0 8px 22px rgba(31,59,99,.05)}.channel-icon{width:46px;height:46px;border-radius:14px;display:grid;place-items:center;font-size:11px;font-weight:900;letter-spacing:.03em}.channel-card:nth-child(1) .channel-icon{background:#eaf2ff;color:#1769ff}.channel-card:nth-child(2) .channel-icon{background:#eafbf7;color:#0a9c74}.channel-card:nth-child(3) .channel-icon{background:#fff5e8;color:#df7c09}.channel-card:nth-child(4) .channel-icon{background:#f1edff;color:#7258d8}.channel-title{font-weight:800;font-size:14px;margin-bottom:4px}.channel-meta{color:#8a99ab;font-size:11px}.channel-state{font-size:11px;font-weight:800;color:#0d9b6c}.floating-card{position:absolute;background:#fff;border:1px solid var(--line);border-radius:17px;padding:12px 15px;box-shadow:var(--shadow-sm);font-size:12px;font-weight:700}.floating-card.one{right:-20px;top:52px}.floating-card.two{left:-10px;bottom:22px}.mini-badge{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--green);margin-right:7px}.trust-strip{padding:28px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:#fff}.trust-strip-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;color:#6b7788}.trust-label{font-size:12px;font-weight:800;letter-spacing:.1em;text-transform:uppercase}.trust-industries{display:flex;align-items:center;gap:26px;flex-wrap:wrap}.trust-industries span{font-size:14px;font-weight:750;color:#526174}.partner-logo{height:34px;min-width:82px;display:grid;place-items:center}.partner-logo img{height:30px;max-width:120px;object-fit:contain;filter:grayscale(1);opacity:.72}.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:46px}.product-card{padding:28px;border:1px solid var(--line);border-radius:24px;background:#fff;min-height:300px;display:flex;flex-direction:column;transition:.25s;position:relative;overflow:hidden}.product-card:after{content:"";position:absolute;width:130px;height:130px;border-radius:50%;right:-70px;bottom:-70px;background:var(--brand-soft);transition:.3s}.product-card:hover{transform:translateY(-7px);box-shadow:var(--shadow);border-color:#dce7f8}.product-card:hover:after{transform:scale(1.25)}.product-icon{width:54px;height:54px;border-radius:16px;background:var(--brand-soft);color:var(--brand);display:grid;place-items:center;font-size:11px;font-weight:900;letter-spacing:.04em;margin-bottom:34px}.product-card:nth-child(2) .product-icon{background:#eafbf7;color:#0d9b72}.product-card:nth-child(3) .product-icon{background:#fff5e8;color:#d97a08}.product-card:nth-child(4) .product-icon{background:#f1edff;color:#6e57d2}.product-card h3{font-size:21px;letter-spacing:-.03em;margin:0 0 12px}.product-card p{font-size:14px;line-height:1.75;color:var(--muted);margin:0 0 22px}.product-link{margin-top:auto;color:var(--brand);font-size:13px;font-weight:800}.platform-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:75px;align-items:center}.platform-diagram{position:relative;min-height:480px;display:grid;place-items:center}.platform-core{width:176px;height:176px;border-radius:50%;background:linear-gradient(145deg,#1769ff,#5c96ff);display:grid;place-items:center;color:#fff;text-align:center;font-weight:900;letter-spacing:-.03em;box-shadow:0 28px 60px rgba(23,105,255,.3);z-index:3}.orbit{position:absolute;border:1px dashed rgba(82,132,216,.34);border-radius:50%}.orbit.one{width:330px;height:330px}.orbit.two{width:455px;height:455px}.orbit-node{position:absolute;width:100px;height:100px;border-radius:24px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-sm);display:grid;place-items:center;text-align:center;font-size:12px;font-weight:850;color:#334155;z-index:4}.orbit-node.sms{top:8px;left:50%;transform:translateX(-50%)}.orbit-node.zalo{right:4px;top:50%;transform:translateY(-50%)}.orbit-node.voice{bottom:8px;left:50%;transform:translateX(-50%)}.orbit-node.otp{left:4px;top:50%;transform:translateY(-50%)}.bullet-list{display:grid;grid-template-columns:1fr 1fr;gap:13px;margin-top:32px}.bullet{padding:14px 15px;border-radius:14px;background:#fff;border:1px solid var(--line);font-size:13px;font-weight:700;color:#34445b}.bullet:before{content:"✓";color:var(--brand);margin-right:8px}.scenario-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:42px}.scenario{padding:28px 24px;border-radius:22px;background:#fff;border:1px solid var(--line)}.scenario-num{color:var(--brand);font-size:12px;font-weight:900;margin-bottom:30px}.scenario h3{font-size:19px;margin:0 0 10px}.scenario p{font-size:14px;line-height:1.7;color:var(--muted);margin:0}.dev-grid{display:grid;grid-template-columns:1fr 1fr;gap:70px;align-items:center}.tags{display:flex;flex-wrap:wrap;gap:9px;margin-top:26px}.tag{padding:8px 11px;border-radius:10px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);font-size:12px;font-weight:700;color:#cfe0f6}.code-window{background:#071222;border:1px solid rgba(255,255,255,.12);border-radius:24px;box-shadow:0 30px 80px rgba(0,0,0,.28);overflow:hidden}.code-head{height:48px;border-bottom:1px solid rgba(255,255,255,.1);display:flex;align-items:center;padding:0 18px;gap:7px}.code-head i{width:8px;height:8px;border-radius:50%;background:#49617f}.code-body{padding:26px}.code-body pre{margin:0;white-space:pre-wrap;color:#c9dcf8;font:13px/1.8 ui-monospace,SFMono-Regular,Menlo,monospace}.reason-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:46px}.reason{padding:27px 24px;border:1px solid var(--line);border-radius:22px;background:#fff}.reason-icon{width:42px;height:42px;border-radius:13px;background:var(--brand-soft);color:var(--brand);display:grid;place-items:center;font-weight:900;margin-bottom:28px}.reason h3{font-size:18px;margin:0 0 10px}.reason p{margin:0;color:var(--muted);font-size:14px;line-height:1.7}.process{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:50px}.step{position:relative;padding:0 26px 0 0}.step:not(:last-child):after{content:"";position:absolute;top:25px;right:14px;width:calc(100% - 76px);height:1px;background:#dce5f2;transform:translateX(100%)}.step-num{width:52px;height:52px;border-radius:16px;background:var(--brand-soft);color:var(--brand);display:grid;place-items:center;font-size:13px;font-weight:900;margin-bottom:22px;position:relative;z-index:2}.step h3{font-size:18px;margin:0 0 10px}.step p{font-size:14px;line-height:1.7;color:var(--muted);margin:0}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:25px;overflow:hidden;margin-top:55px}.stat{padding:32px;background:#fff;text-align:center}.stat strong{display:block;font-size:31px;color:var(--brand);letter-spacing:-.04em}.stat span{display:block;color:var(--muted);font-size:12px;font-weight:700;margin-top:7px}.faq-wrap{display:grid;grid-template-columns:.8fr 1.2fr;gap:70px}.faq-list{border-top:1px solid var(--line)}.faq-item{border-bottom:1px solid var(--line)}.faq-q{width:100%;padding:22px 0;border:0;background:transparent;display:flex;align-items:center;justify-content:space-between;text-align:left;font-weight:750;color:var(--ink);cursor:pointer}.faq-q span:last-child{color:var(--brand);font-size:20px}.faq-a{max-height:0;overflow:hidden;color:var(--muted);font-size:14px;line-height:1.75;transition:.25s}.faq-item.open .faq-a{max-height:180px;padding-bottom:22px}.cta-box{padding:54px 58px;border-radius:30px;background:linear-gradient(135deg,#0e5df0,#377fff);color:#fff;display:flex;align-items:center;justify-content:space-between;gap:40px;box-shadow:0 30px 70px rgba(23,105,255,.22)}.cta-box h2{font-size:34px;letter-spacing:-.04em;margin:0 0 10px}.cta-box p{margin:0;color:#dfeaff;max-width:650px;line-height:1.7}.footer{background:#071326;color:#dbe7f5;padding:68px 0 30px}.footer-grid{display:grid;grid-template-columns:1.4fr .8fr .8fr 1fr;gap:55px}.footer .brand{color:#fff}.footer-copy{color:#879bb3;font-size:14px;line-height:1.8;max-width:330px;margin-top:20px}.footer h4{font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:#7f96b1;margin:0 0 18px}.footer a,.footer p{display:block;color:#b7c7d9;font-size:13px;line-height:2;margin:0}.footer a:hover{color:#fff}.footer-bottom{border-top:1px solid rgba(255,255,255,.08);margin-top:45px;padding-top:25px;display:flex;justify-content:space-between;color:#71869f;font-size:12px}.page-hero{padding:82px 0 72px;background:radial-gradient(circle at 80% 20%,#e9f2ff,transparent 35%),#fbfdff;border-bottom:1px solid var(--line)}.page-hero-grid{display:grid;grid-template-columns:1fr .75fr;gap:70px;align-items:center}.page-hero h1{font-size:clamp(42px,5vw,64px);letter-spacing:-.055em;line-height:1.02;margin:0 0 22px}.page-hero p{font-size:17px;color:var(--muted);line-height:1.8;margin:0;max-width:680px}.page-visual{height:330px;border:1px solid var(--line);border-radius:28px;background:#fff;box-shadow:var(--shadow);padding:30px;display:grid;align-content:center;gap:13px}.signal-row{display:grid;grid-template-columns:52px 1fr 70px;align-items:center;gap:12px;padding:13px 15px;border:1px solid var(--line);border-radius:15px}.signal-icon{width:42px;height:42px;border-radius:12px;background:var(--brand-soft);color:var(--brand);display:grid;place-items:center;font-size:10px;font-weight:900}.signal-bar{height:8px;border-radius:99px;background:#e9eef6;overflow:hidden}.signal-bar i{display:block;height:100%;width:78%;background:linear-gradient(90deg,var(--brand),#86b3ff);border-radius:inherit}.signal-status{font-size:11px;font-weight:800;color:#0c9367}.feature-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin-top:40px}.feature-card{padding:28px;border:1px solid var(--line);border-radius:22px;background:#fff}.feature-card h3{margin:0 0 10px;font-size:19px}.feature-card p{margin:0;color:var(--muted);font-size:14px;line-height:1.75}.flow-row{display:flex;align-items:center;gap:9px;flex-wrap:wrap;margin-top:34px}.flow-chip{padding:10px 13px;border:1px solid var(--line);border-radius:11px;background:#fff;color:#44556b;font-size:13px;font-weight:700}.flow-arrow{color:#9aadbf}.pricing-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:42px}.price-card{border:1px solid var(--line);border-radius:24px;background:#fff;padding:28px;display:flex;flex-direction:column}.price-card:nth-child(4){border-color:#b8cff9;background:linear-gradient(180deg,#f8fbff,#fff)}.price-card h3{font-size:20px;margin:0 0 6px}.price-sub{color:var(--muted);font-size:12px;font-weight:600}.price{font-size:30px;font-weight:850;letter-spacing:-.04em;margin:28px 0}.price-list{display:grid;gap:13px;margin-bottom:28px}.price-list span{font-size:13px;color:#42526a}.price-list span:before{content:"✓";color:var(--brand);font-weight:900;margin-right:9px}.price-card .btn{margin-top:auto}.notice{margin-top:24px;padding:16px 18px;border:1px solid #dce8fa;border-radius:15px;background:#f6f9ff;color:#526784;font-size:13px;line-height:1.65}.docs-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:60px;align-items:start}.docs-steps{display:grid;gap:13px}.docs-step{padding:20px;border:1px solid var(--line);border-radius:18px;background:#fff}.docs-step h3{font-size:16px;margin:0 0 8px}.docs-step p{margin:0;color:var(--muted);font-size:13px;line-height:1.7}.contact-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:60px;align-items:start}.contact-info{padding:32px;border:1px solid var(--line);border-radius:24px;background:#fff}.contact-info-row{padding:18px 0;border-bottom:1px solid var(--line)}.contact-info-row:last-child{border-bottom:0}.contact-info-row small{display:block;color:#91a0b2;font-size:10px;font-weight:800;letter-spacing:.1em;text-transform:uppercase;margin-bottom:6px}.contact-info-row strong{font-size:14px}.form-card{padding:34px;border:1px solid var(--line);border-radius:26px;background:#fff;box-shadow:var(--shadow-sm)}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.field{display:grid;gap:7px}.field.full{grid-column:1/-1}.field label{font-size:12px;font-weight:750;color:#435269}.input{width:100%;min-height:48px;border:1px solid #dfe6f0;border-radius:13px;padding:11px 13px;background:#fff;color:var(--ink);outline:none;transition:.2s}.input:focus{border-color:#8bb6ff;box-shadow:0 0 0 4px #edf4ff}textarea.input{min-height:126px;resize:vertical}.form-message{display:none;margin-top:15px;padding:11px 13px;border-radius:11px;font-size:13px}.form-message.show{display:block}.form-message.success{background:#eafaf4;color:#087953}.form-message.error{background:#fff0f0;color:#b83333}.empty-state{text-align:center;padding:60px 20px;color:var(--muted)}
@media(max-width:980px){.nav-links{display:none}.menu-btn{display:grid}.nav-actions .btn-secondary{display:none}.hero-grid,.platform-grid,.dev-grid,.faq-wrap,.page-hero-grid,.docs-grid,.contact-grid{grid-template-columns:1fr}.hero-visual{min-height:500px}.cards,.reason-grid,.scenario-grid,.pricing-grid{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:1fr 1fr}.platform-grid{gap:35px}.faq-wrap{gap:40px}.mobile-menu{display:none;position:fixed;inset:78px 0 auto;background:#fff;border-bottom:1px solid var(--line);padding:18px 20px;box-shadow:var(--shadow-sm)}.mobile-menu.open{display:grid;z-index:45}.mobile-menu a{padding:13px 5px;border-bottom:1px solid var(--line);font-weight:650;font-size:14px}.process{grid-template-columns:1fr 1fr;gap:30px}.step:not(:last-child):after{display:none}.stats{grid-template-columns:1fr 1fr}}
@media(max-width:640px){.container{width:min(calc(100% - 28px),var(--container))}.section{padding:72px 0}.header{height:70px}.mobile-menu{inset:70px 0 auto}.nav-actions .btn-primary{display:none}.hero{padding:52px 0 65px}.hero h1{font-size:47px}.hero-copy{font-size:16px}.hero-actions{flex-direction:column;align-items:stretch}.hero-visual{min-height:430px;margin-top:10px}.hero-glow{width:330px;height:330px}.dashboard-shell{inset:20px 0 30px 0;padding:16px}.dashboard-body{grid-template-columns:70px 1fr;gap:10px}.channel-card{grid-template-columns:37px 1fr;padding:11px;gap:9px}.channel-icon{width:37px;height:37px}.channel-state{display:none}.floating-card{display:none}.trust-strip-inner{align-items:flex-start;flex-direction:column}.cards,.reason-grid,.scenario-grid,.pricing-grid,.feature-grid{grid-template-columns:1fr}.platform-diagram{min-height:370px;transform:scale(.82);margin:-25px}.bullet-list{grid-template-columns:1fr}.process{grid-template-columns:1fr}.stats{grid-template-columns:1fr 1fr}.stat{padding:24px 12px}.cta-box{padding:36px 26px;display:block}.cta-box .btn{margin-top:24px;width:100%}.footer-grid{grid-template-columns:1fr;gap:32px}.footer-bottom{display:block;line-height:2}.page-hero{padding:58px 0}.page-visual{height:280px;padding:20px}.form-grid{grid-template-columns:1fr}.field.full{grid-column:auto}.form-card,.contact-info{padding:24px}.section-title{font-size:36px}.docs-grid,.contact-grid{gap:35px}}
.mobile-menu{display:none!important;}