:root{
  --navy:#0c2354;
  --blue:#2776d9;
  --sky:#0fa0e6;
  --orange:#f28b2d;
  --orange-dark:#df6f11;
  --text:#18324a;
  --muted:#66788a;
  --line:#dfe8f2;
  --soft:#f5f9fe;
  --soft-blue:#eef7ff;
  --soft-orange:#fff6ed;
  --white:#fff;
  --success:#1a9d68;
  --shadow:0 18px 50px rgba(18,55,97,.09);
  --radius:22px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:Inter,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;color:var(--text);background:#fff;line-height:1.65}
a{text-decoration:none}
img{max-width:100%}
.section-pad{padding:88px 0}
.section-soft{background:linear-gradient(180deg,#f7fbff 0%,#f3f8fd 100%)}
.section-orange{background:linear-gradient(180deg,#fffaf5 0%,#fff5eb 100%)}
.eyebrow{display:inline-flex;align-items:center;gap:.55rem;padding:.45rem .8rem;border-radius:999px;background:#eaf4ff;color:var(--blue);font-size:.82rem;font-weight:800;letter-spacing:.02em}
.eyebrow.orange{background:#fff0df;color:var(--orange-dark)}
.section-title{font-weight:800;letter-spacing:-.03em;color:var(--navy);font-size:clamp(2rem,3.4vw,3.35rem);line-height:1.1}
.section-desc{color:var(--muted);font-size:1.05rem;max-width:760px}
.text-gradient{background:linear-gradient(90deg,var(--sky),var(--blue),var(--orange));-webkit-background-clip:text;background-clip:text;color:transparent}
.btn-brand{background:linear-gradient(135deg,var(--orange),#ffab54);border:none;color:white;font-weight:800;border-radius:12px;padding:.83rem 1.15rem;box-shadow:0 10px 26px rgba(242,139,45,.24)}
.btn-brand:hover{background:linear-gradient(135deg,#e27617,#ff9b39);color:#fff;transform:translateY(-1px)}
.btn-outline-brand{border:1.5px solid #b9cfea;color:var(--navy);font-weight:800;border-radius:12px;padding:.78rem 1.1rem;background:#fff}
.btn-outline-brand:hover{border-color:var(--blue);color:var(--blue);background:#f7fbff}

/* header */
.top-strip{background:var(--navy);color:#dfeaff;font-size:.83rem}
.top-strip a{color:#fff}
.site-header{position:sticky;top:0;z-index:1030;background:rgba(255,255,255,.94);backdrop-filter:blur(14px);border-bottom:1px solid rgba(223,232,242,.85)}
.navbar-brand img{height:48px;width:auto}
.navbar .nav-link{color:#28415d;font-weight:700;font-size:.93rem;padding:.9rem .8rem!important}
.navbar .nav-link:hover,.navbar .nav-link.active{color:var(--blue)}
.dropdown-menu{border:1px solid #e6edf5;border-radius:16px;box-shadow:var(--shadow);padding:.6rem;min-width:250px}
.dropdown-item{border-radius:10px;padding:.65rem .75rem;color:#2b435f;font-weight:600;font-size:.91rem}
.dropdown-item:hover{background:#eef7ff;color:var(--blue)}

/* hero */
.hero{position:relative;overflow:hidden;padding:86px 0 74px;background:
radial-gradient(circle at 8% 12%,rgba(27,162,231,.12),transparent 27%),
radial-gradient(circle at 86% 13%,rgba(242,139,45,.13),transparent 24%),
linear-gradient(180deg,#fff 0%,#f6faff 100%)}
.hero:after{content:"";position:absolute;right:-180px;bottom:-260px;width:520px;height:520px;border-radius:50%;border:70px solid rgba(34,118,217,.04)}
.hero h1{font-size:clamp(2.75rem,5.2vw,5.2rem);font-weight:900;letter-spacing:-.05em;line-height:.99;color:var(--navy)}
.hero .lead{color:var(--muted);font-size:1.18rem;max-width:720px}
.hero-pills{display:flex;flex-wrap:wrap;gap:.6rem;margin-top:1.3rem}
.hero-pill{background:#fff;border:1px solid var(--line);padding:.52rem .75rem;border-radius:999px;color:#36506c;font-weight:700;font-size:.87rem;box-shadow:0 6px 18px rgba(30,70,120,.05)}
.hero-board{position:relative;background:#fff;border:1px solid #e0eaf4;border-radius:28px;padding:20px;box-shadow:0 28px 80px rgba(28,74,123,.14)}
.hero-board .board-top{display:flex;justify-content:space-between;align-items:center;background:linear-gradient(135deg,#eef7ff,#fff5ea);border-radius:18px;padding:16px}
.mini-kpi{background:#fff;border:1px solid #e8eef5;border-radius:16px;padding:15px;height:100%}
.mini-kpi .icon{width:42px;height:42px;border-radius:13px;display:grid;place-items:center;background:#eef6ff;color:var(--blue);font-size:1.2rem}
.flow-line{border-left:2px dashed #bdd7ee;margin-left:20px;padding-left:20px}
.flow-step{position:relative;margin:13px 0;background:#f9fbfd;border:1px solid #e8eef5;border-radius:14px;padding:11px 13px;font-weight:750;font-size:.89rem}
.flow-step:before{content:"";position:absolute;left:-27px;top:50%;width:12px;height:12px;border-radius:50%;background:var(--orange);transform:translateY(-50%);box-shadow:0 0 0 5px #fff3e7}

/* cards */
.feature-card,.service-card,.product-card,.solution-card,.case-card,.step-card,.faq-wrap,.contact-card{background:#fff;border:1px solid #e3ebf3;border-radius:var(--radius);box-shadow:0 10px 35px rgba(32,72,115,.055)}
.feature-card{padding:26px;height:100%;transition:.25s ease}
.feature-card:hover,.service-card:hover,.product-card:hover,.solution-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.icon-box{width:54px;height:54px;border-radius:16px;display:grid;place-items:center;background:linear-gradient(145deg,#edf7ff,#e4f0ff);color:var(--blue);font-size:1.45rem;margin-bottom:18px}
.icon-box.orange{background:linear-gradient(145deg,#fff4e9,#ffead2);color:var(--orange-dark)}
.card-title-brand{font-weight:850;color:var(--navy);font-size:1.1rem}
.card-muted{color:var(--muted);font-size:.94rem}
.service-card{padding:24px;height:100%;position:relative;overflow:hidden}
.service-card:before{content:"";position:absolute;left:0;top:0;width:100%;height:4px;background:linear-gradient(90deg,var(--blue),var(--sky),var(--orange))}
.service-card .service-link{font-weight:800;color:var(--blue);font-size:.9rem}
.product-card{padding:30px;height:100%;overflow:hidden;position:relative}
.product-card.featured{background:linear-gradient(145deg,#0c2354,#123c77);color:#fff;border:none}
.product-card.featured h3,.product-card.featured .card-title-brand{color:#fff}
.product-card.featured .card-muted{color:#cfe1f7}
.product-badge{display:inline-flex;padding:.35rem .65rem;border-radius:999px;background:#eef7ff;color:var(--blue);font-weight:800;font-size:.76rem;margin-bottom:14px}
.product-card.featured .product-badge{background:rgba(255,255,255,.12);color:#fff}

/* ecosystem */
.ecosystem-wrap{background:#fff;border:1px solid #e2ebf3;border-radius:30px;padding:30px;box-shadow:var(--shadow)}
.eco-core{background:linear-gradient(135deg,#0c2354,#1555a1);color:#fff;border-radius:24px;padding:28px;height:100%}
.eco-core .logo-mark{background:#fff;border-radius:18px;padding:9px;margin-bottom:16px;width:70px}
.eco-node{border:1px solid #e3ebf3;background:#fbfdff;border-radius:18px;padding:18px;height:100%}
.eco-node strong{color:var(--navy)}
.eco-node .small{color:var(--muted)}

/* comparison */
.compare-card{border-radius:24px;padding:28px;height:100%}
.compare-old{background:#f6f7f9;border:1px solid #e5e7eb}
.compare-new{background:linear-gradient(160deg,#edf8ff,#fff7ee);border:1px solid #d8e9f8}
.check-list{list-style:none;padding:0;margin:0}
.check-list li{display:flex;gap:.65rem;margin:.75rem 0;color:#435b74}
.check-list i{color:var(--success);margin-top:.25rem}
.compare-old .check-list i{color:#94a3b8}

/* free tools */
.tool-card{display:flex;gap:15px;background:#fff;border:1px solid #e0e9f3;border-radius:18px;padding:18px;height:100%}
.tool-card .tool-icon{width:46px;height:46px;border-radius:14px;display:grid;place-items:center;flex:none;background:#eaf5ff;color:var(--blue);font-size:1.2rem}

/* steps */
.step-card{padding:23px;height:100%;position:relative}
.step-no{font-size:2.2rem;line-height:1;font-weight:900;color:#dceafa;margin-bottom:8px}
.step-card h4{font-size:1rem;font-weight:850;color:var(--navy)}

/* case */
.case-card{overflow:hidden;height:100%}
.case-visual{background:linear-gradient(135deg,#e7f5ff,#fff3e7);min-height:210px;padding:25px;display:flex;align-items:center;justify-content:center}
.browser-mock{width:92%;background:white;border-radius:14px;box-shadow:0 20px 45px rgba(20,61,105,.15);overflow:hidden;border:1px solid #dfe9f2}
.browser-bar{height:28px;background:#f4f6f8;border-bottom:1px solid #e5e7eb;display:flex;align-items:center;padding:0 10px;gap:5px}
.browser-dot{width:7px;height:7px;border-radius:50%;background:#d2dae3}
.browser-body{padding:18px}
.case-content{padding:24px}

/* pricing */
.price-card{background:#fff;border:1px solid #e3ebf3;border-radius:22px;padding:26px;height:100%}
.price-card.highlight{border:2px solid #5c9fe9;box-shadow:0 18px 45px rgba(56,124,200,.12)}
.price-label{font-weight:850;color:var(--navy)}
.price-note{color:var(--muted);font-size:.86rem}

/* FAQ */
.accordion-item{border:1px solid #e4ebf3!important;border-radius:14px!important;margin-bottom:10px;overflow:hidden}
.accordion-button{font-weight:800;color:var(--navy);background:#fff}
.accordion-button:not(.collapsed){background:#eef7ff;color:var(--blue);box-shadow:none}
.accordion-button:focus{box-shadow:none}

/* contact */
.contact-shell{background:linear-gradient(135deg,#0d2d65,#0e4e92);border-radius:30px;color:#fff;padding:38px;overflow:hidden;position:relative}
.contact-shell:after{content:"";position:absolute;right:-90px;top:-120px;width:320px;height:320px;border-radius:50%;border:55px solid rgba(255,255,255,.05)}
.contact-shell h2{font-weight:900;letter-spacing:-.03em}
.contact-form{background:#fff;border-radius:22px;padding:24px;position:relative;z-index:2}
.form-control,.form-select{border-radius:12px;border:1px solid #dbe5ee;padding:.72rem .85rem}
.form-control:focus,.form-select:focus{border-color:#7bb0e5;box-shadow:0 0 0 .2rem rgba(39,118,217,.1)}

/* footer */
.footer{background:#071a3a;color:#b9c9dd;padding:56px 0 22px}
.footer .footer-logo{background:#fff;border-radius:12px;padding:6px 10px;height:48px}
.footer h6{color:#fff;font-weight:850}
.footer a{color:#c8d6e7;font-size:.92rem;display:block;margin:.48rem 0}
.footer a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);margin-top:30px;padding-top:18px;font-size:.84rem}

/* floating */
.floating-contact{position:fixed;right:18px;bottom:18px;z-index:1040;display:flex;flex-direction:column;gap:10px}
.float-btn{width:52px;height:52px;border-radius:50%;display:grid;place-items:center;color:#fff;box-shadow:0 12px 25px rgba(0,0,0,.16);font-size:1.2rem}
.float-phone{background:#1ca463}.float-ai{background:linear-gradient(135deg,var(--blue),var(--sky))}.float-zalo{background:#0967e8;font-weight:900;font-size:.8rem}

.reveal{opacity:0;transform:translateY(18px);transition:.65s ease}
.reveal.show{opacity:1;transform:none}

@media (max-width:991.98px){
  .section-pad{padding:66px 0}
  .hero{padding:62px 0 54px}
  .navbar-brand img{height:42px}
  .hero-board{margin-top:30px}
  .top-strip{display:none}
  .navbar-collapse{padding:12px 0 18px}
  .navbar .nav-link{padding:.65rem .2rem!important}
}
@media (max-width:575.98px){
  .section-pad{padding:54px 0}
  .hero h1{font-size:2.75rem}
  .hero .lead{font-size:1.02rem}
  .contact-shell{padding:22px}
  .ecosystem-wrap{padding:18px}
  .floating-contact{right:12px;bottom:12px}
  .float-btn{width:46px;height:46px}
}


/* ===== Multi-page detail system v1.1 ===== */
.page-hero{position:relative;overflow:hidden;padding:76px 0 68px;background:radial-gradient(circle at 10% 15%,rgba(27,162,231,.12),transparent 28%),radial-gradient(circle at 86% 15%,rgba(242,139,45,.11),transparent 25%),linear-gradient(180deg,#fff,#f6faff)}
.page-hero h1{font-size:clamp(2.5rem,4.6vw,4.5rem);font-weight:900;letter-spacing:-.045em;line-height:1.02;color:var(--navy)}
.page-hero .lead{color:var(--muted);font-size:1.13rem;max-width:760px;margin-top:1.3rem}
.breadcrumb{font-size:.86rem;margin-bottom:1.3rem}.breadcrumb a{color:var(--blue);font-weight:700}.breadcrumb-item.active{color:#76879a}
.page-visual{background:#fff;border:1px solid #dfe9f3;border-radius:30px;min-height:370px;display:grid;place-items:center;box-shadow:var(--shadow);position:relative;overflow:hidden}
.page-visual:before,.page-visual:after{content:"";position:absolute;border-radius:50%;border:1px solid rgba(31,112,211,.12)}
.page-visual:before{width:330px;height:330px}.page-visual:after{width:245px;height:245px}
.visual-orbit{width:310px;height:310px;position:relative}.visual-main{position:absolute;inset:89px;border-radius:34px;background:linear-gradient(135deg,var(--blue),var(--navy));color:#fff;display:grid;place-items:center;font-size:3.5rem;box-shadow:0 25px 55px rgba(13,70,137,.22)}
.visual-chip{position:absolute;background:#fff;border:1px solid #dfe9f3;border-radius:999px;padding:.55rem .85rem;font-weight:800;color:var(--navy);box-shadow:0 10px 25px rgba(24,58,96,.09);font-size:.85rem}
.chip-a{top:25px;left:13px}.chip-b{top:42px;right:9px}.chip-c{bottom:34px;left:13px}.chip-d{bottom:20px;right:20px}
.price-highlight{display:inline-flex;align-items:center;gap:.5rem;background:#fff6e9;border:1px solid #f5d8b5;color:#8a4b0c;padding:.7rem .9rem;border-radius:14px;font-weight:800}
.detail-panel{background:#fff;border:1px solid #e2ebf3;border-radius:24px;padding:28px;box-shadow:0 12px 35px rgba(32,72,115,.06)}
.detail-list-item{display:flex;gap:13px;align-items:flex-start;background:#fff;border:1px solid #e2ebf3;border-radius:16px;padding:16px;height:100%}.detail-list-item>i{font-size:1.3rem;color:var(--success);margin-top:2px}.detail-list-item strong{color:var(--navy)}
.scenario-flow{background:#fff;border:1px solid #eadfce;border-radius:24px;padding:24px;box-shadow:0 14px 35px rgba(80,55,20,.05)}
.scenario-step{display:flex;align-items:center;gap:14px;padding:12px 0;border-bottom:1px dashed #eadfce}.scenario-step:last-child{border-bottom:0}.scenario-step span{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:#fff1dd;color:#a85f0a;font-weight:900;flex:none}.scenario-step div{font-weight:750;color:#43566a}
.related-card{display:flex;align-items:center;gap:14px;border:1px solid #e2ebf3;border-radius:18px;padding:17px 18px;background:#fff;height:100%;transition:.22s ease}.related-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}.related-card>i:first-child{width:42px;height:42px;border-radius:13px;display:grid;place-items:center;background:#eaf5ff;color:var(--blue);font-size:1.15rem}.related-card strong{display:block;color:var(--navy)}.related-card span{display:block;color:var(--muted);font-size:.82rem;margin-top:2px}
.cta-band{display:flex;align-items:center;justify-content:space-between;gap:25px;background:linear-gradient(135deg,#0c2d64,#1364aa);color:#fff;border-radius:28px;padding:34px 38px;box-shadow:0 25px 55px rgba(13,57,113,.16)}.cta-band h2{font-weight:900;margin:.3rem 0}.cta-band p{color:#cce1f7}
.category-hero{padding:65px 0;background:linear-gradient(180deg,#fff,#f7fbff)}
.category-card{display:block;background:#fff;border:1px solid #e1e9f2;border-radius:20px;padding:23px;height:100%;transition:.22s}.category-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}.category-card .icon-box{margin-bottom:14px}.category-card h3{font-size:1.08rem;color:var(--navy);font-weight:850}.category-card p{color:var(--muted);font-size:.92rem;margin-bottom:0}
.article-card{background:#fff;border:1px solid #e1e9f2;border-radius:20px;overflow:hidden;height:100%;transition:.22s}.article-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}.article-thumb{height:150px;background:linear-gradient(135deg,#e8f5ff,#fff1df);display:grid;place-items:center;font-size:2.8rem;color:var(--blue)}.article-body{padding:20px}.article-body h3{font-size:1.05rem;color:var(--navy);font-weight:850}.article-meta{font-size:.78rem;color:#8392a4}
.map-placeholder{min-height:330px;border-radius:24px;background:linear-gradient(135deg,#eef7ff,#f9fbfd);border:1px solid #dce8f3;display:grid;place-items:center;text-align:center;padding:30px;color:var(--muted)}.map-placeholder i{font-size:3.5rem;color:var(--blue)}
.contact-info-card{background:#fff;border:1px solid #e2eaf2;border-radius:18px;padding:19px;height:100%}.contact-info-card i{font-size:1.45rem;color:var(--blue)}.contact-info-card strong{display:block;color:var(--navy);margin-top:8px}.contact-info-card span{color:var(--muted);font-size:.9rem}
.timeline{position:relative;padding-left:28px}.timeline:before{content:"";position:absolute;left:8px;top:8px;bottom:8px;width:2px;background:#d7e6f5}.timeline-item{position:relative;padding:0 0 25px 14px}.timeline-item:before{content:"";position:absolute;left:-25px;top:5px;width:12px;height:12px;border-radius:50%;background:var(--orange);box-shadow:0 0 0 5px #fff3e6}.timeline-item strong{color:var(--navy)}
@media(max-width:767.98px){.cta-band{flex-direction:column;align-items:flex-start;padding:25px}.page-visual{min-height:300px}.visual-orbit{transform:scale(.83)}.page-hero{padding:55px 0 48px}}


/* v1.2 Knowledge + SEO/functionality */
.hp-field{position:absolute!important;left:-10000px!important;width:1px!important;height:1px!important;opacity:0!important;pointer-events:none!important}
.form-status{padding:.75rem 1rem;border-radius:12px;margin-top:.75rem;font-size:.92rem}.form-status.success{background:#eaf8f0;color:#15603a}.form-status.error{background:#fff0f0;color:#9a2d2d}
.news-category-nav{display:flex;gap:.6rem;flex-wrap:wrap}.news-category-nav a{padding:.6rem .9rem;border:1px solid #dce8f5;border-radius:999px;background:#fff;color:var(--navy);text-decoration:none;font-weight:650}.news-category-nav a:hover{border-color:var(--blue);color:var(--blue)}
.knowledge-hub-card{padding:1.5rem;border:1px solid #e2eaf2;border-radius:22px;background:#fff;text-decoration:none;box-shadow:0 10px 30px rgba(26,67,112,.05);transition:.25s ease}.knowledge-hub-card:hover{transform:translateY(-4px);box-shadow:0 16px 38px rgba(26,67,112,.10)}
.article-thumb{height:180px;background:linear-gradient(135deg,#eef7ff,#fff7ef);text-decoration:none}.article-thumb i{font-size:3rem;color:var(--blue)}
.article-hero{padding:6.5rem 0 3.5rem;background:linear-gradient(135deg,#f5faff 0%,#fff 55%,#fff6eb 100%)}.article-hero h1{max-width:920px;font-size:clamp(2.1rem,5vw,4rem);line-height:1.08;color:var(--navy);font-weight:800}.article-deck{max-width:880px;font-size:1.2rem;color:#58697b}.article-kicker{font-size:.82rem;text-transform:uppercase;letter-spacing:.1em;color:var(--orange);font-weight:800}.article-byline{display:flex;flex-wrap:wrap;gap:1rem;color:#6b7d8f;font-size:.92rem;margin-top:1.4rem}
.article-content{font-size:1.08rem;line-height:1.8;color:#32475a}.article-intro{font-size:1.2rem;color:#3e556a}.article-section{margin:2.2rem 0}.article-section h2{color:var(--navy);font-size:1.6rem;font-weight:750}.article-section li{margin:.55rem 0}.article-note{background:#eef7ff;border-left:4px solid var(--blue);padding:1rem 1.2rem;border-radius:12px;margin:2rem 0}.article-cta{background:linear-gradient(135deg,#0c2354,#135bb0);color:#fff;padding:2rem;border-radius:24px;margin-top:2.5rem}.article-cta h2{color:#fff}.article-sidebar{padding:1.25rem;border:1px solid #e3eaf2;border-radius:20px;background:#fff}.related-article{display:flex;gap:.8rem;padding:.8rem 0;text-decoration:none;border-bottom:1px solid #edf1f5}.related-article:last-child{border-bottom:0}.related-article i{font-size:1.4rem;color:var(--blue)}.related-article small{display:block;color:#7b8b9a}.related-article strong{display:block;color:var(--navy);line-height:1.35}
.newsletter-box{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:1.5rem;border-radius:22px;background:#f2f8ff;border:1px solid #dceaf8}@media(max-width:767px){.newsletter-box{align-items:flex-start;flex-direction:column}.article-hero{padding-top:4rem}}