*{margin:0;padding:0;box-sizing:border-box}
:root{--pri:#f97316;--pri-d:#ea580c;--dark:#1e293b;--nav:#0f2942;--gray:#64748b;--bg:#f8fafc;--line:#e2e8f0}
body{font-family:'Be Vietnam Pro',sans-serif;color:var(--dark);line-height:1.6;background:#fff}
.wrap{max-width:1140px;margin:0 auto;padding:0 20px}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 28px;border-radius:100px;font-weight:600;font-size:16px;cursor:pointer;border:none;transition:.2s;font-family:inherit}
.btn-pri{background:var(--pri);color:#fff;box-shadow:0 4px 14px rgba(249,115,22,.35)}
.btn-pri:hover{background:var(--pri-d);transform:translateY(-2px)}
.btn-out{background:#fff;color:var(--dark);border:1.5px solid var(--line)}
.btn-out:hover{border-color:var(--pri);color:var(--pri)}
.btn-white{background:#fff;color:var(--pri)}
.btn-white:hover{transform:translateY(-2px)}

/* Header */
header{position:sticky;top:0;background:rgba(255,255,255,.95);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);z-index:100}
.nav{position:relative;display:flex;align-items:center;justify-content:space-between;height:68px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px}
.logo-ic{width:38px;height:38px;background:linear-gradient(135deg,var(--pri),#fb923c);border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:20px}
.nav-links{display:flex;gap:32px;align-items:center}
.nav-links a{color:var(--gray);font-weight:500;font-size:15px}
.nav-links a:hover{color:var(--pri)}
.nav-links .mobile-login{display:none}
.nav-cta{display:flex;gap:12px;align-items:center}
.menu-btn{display:none;background:none;border:none;font-size:26px;cursor:pointer}

/* Alerts */
.alert{padding:14px 18px;border-radius:12px;font-weight:500;margin-bottom:12px}
.alert-success{background:#dcfce7;color:#16a34a;border:1px solid #bbf7d0}
.alert-error{background:#fef2f2;color:#dc2626;border:1px solid #fecaca}

/* Hero */
.hero{background:linear-gradient(160deg,#0f2942 0%,#1e3a5f 100%);color:#fff;padding:80px 0 90px;position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;top:-100px;right:-100px;width:400px;height:400px;background:radial-gradient(circle,rgba(249,115,22,.25),transparent 70%);border-radius:50%}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:50px;align-items:center;position:relative}
.badge-free{display:inline-flex;align-items:center;gap:8px;background:rgba(34,197,94,.15);color:#4ade80;padding:8px 18px;border-radius:100px;font-weight:600;font-size:14px;margin-bottom:22px;border:1px solid rgba(74,222,128,.3)}
.hero h1{font-size:44px;font-weight:800;line-height:1.15;margin-bottom:20px}
.hero h1 .hl{color:#fb923c}
.hero p{font-size:18px;color:#cbd5e1;margin-bottom:32px;max-width:520px}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap}
.hero-stats{display:flex;gap:32px;margin-top:40px}
.hstat b{display:block;font-size:28px;font-weight:800;color:#fb923c}
.hstat span{font-size:14px;color:#94a3b8}
.phone-mock{background:#fff;border-radius:24px;padding:14px;box-shadow:0 30px 60px rgba(0,0,0,.4);transform:rotate(2deg)}
.phone-screen{background:var(--bg);border-radius:16px;overflow:hidden}
.ps-head{background:var(--nav);color:#fff;padding:16px;font-weight:700}
.ps-body{padding:14px;display:flex;flex-direction:column;gap:10px}
.ps-card{background:#fff;border-radius:12px;padding:14px;box-shadow:0 2px 8px rgba(0,0,0,.06)}
.ps-card .lbl{font-size:11px;color:var(--gray);text-transform:uppercase;font-weight:600}
.ps-card .val{font-size:22px;font-weight:800;margin-top:4px}
.ps-row{display:flex;gap:10px}
.ps-row .ps-card{flex:1}

/* Page header (trang con) */
.page-hero{background:linear-gradient(160deg,#0f2942,#1e3a5f);color:#fff;padding:60px 0;text-align:center}
.page-hero h1{font-size:38px;font-weight:800;margin-bottom:12px}
.page-hero p{font-size:17px;color:#cbd5e1;max-width:640px;margin:0 auto}
.breadcrumb{display:flex;gap:8px;justify-content:center;margin-top:16px;font-size:14px;color:#94a3b8}
.breadcrumb a:hover{color:#fb923c}

/* Sections */
section{padding:70px 0}
.sec-head{text-align:center;max-width:640px;margin:0 auto 50px}
.sec-tag{color:var(--pri);font-weight:700;font-size:14px;text-transform:uppercase;letter-spacing:1px;margin-bottom:12px}
.sec-head h2{font-size:34px;font-weight:800;margin-bottom:14px}
.sec-head p{color:var(--gray);font-size:17px}

/* Features */
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feat{background:#fff;border:1px solid var(--line);border-radius:16px;padding:28px;transition:.2s}
.feat:hover{border-color:var(--pri);box-shadow:0 12px 30px rgba(249,115,22,.1);transform:translateY(-4px)}
.feat-ic{width:52px;height:52px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:26px;margin-bottom:18px}
.feat h3{font-size:19px;font-weight:700;margin-bottom:10px}
.feat p{color:var(--gray);font-size:15px}

/* Free band */
.free-band{background:linear-gradient(135deg,var(--pri),#fb923c);color:#fff;text-align:center}
.free-band h2{font-size:36px;font-weight:800;margin-bottom:16px}
.free-band p{font-size:18px;opacity:.95;max-width:600px;margin:0 auto 30px}
.free-list{display:flex;justify-content:center;gap:30px;flex-wrap:wrap;margin-top:30px}
.free-item{display:flex;align-items:center;gap:8px;font-weight:600;font-size:16px}

/* Pricing */
.price-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:28px;max-width:820px;margin:0 auto}
.price-card{background:#fff;border:2px solid var(--line);border-radius:20px;padding:36px 30px;position:relative;transition:.2s}
.price-card.featured{border-color:var(--pri);box-shadow:0 20px 50px rgba(249,115,22,.15)}
.price-badge{position:absolute;top:-14px;left:50%;transform:translateX(-50%);background:var(--pri);color:#fff;padding:6px 18px;border-radius:100px;font-size:13px;font-weight:700}
.price-name{font-size:22px;font-weight:800;margin-bottom:8px}
.price-desc{color:var(--gray);font-size:14px;margin-bottom:20px;min-height:40px}
.price-val{font-size:38px;font-weight:800;color:var(--pri);margin-bottom:4px}
.price-note{color:var(--gray);font-size:14px;margin-bottom:24px}
.price-features{list-style:none;margin-bottom:28px}
.price-features li{display:flex;align-items:flex-start;gap:10px;padding:8px 0;font-size:15px}
.price-features li .yes{color:#22c55e;font-weight:700;flex-shrink:0}
.price-features li .no{color:#cbd5e1;flex-shrink:0}
.price-features li.off{color:#94a3b8}
.price-card .btn{width:100%;justify-content:center}

/* Steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.step{text-align:center}
.step-num{width:56px;height:56px;background:#fff7ed;color:var(--pri);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:24px;font-weight:800;margin:0 auto 16px;border:2px solid #fed7aa}
.step h4{font-size:17px;font-weight:700;margin-bottom:8px}
.step p{color:var(--gray);font-size:14px}

/* News grid */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.news-card{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden;transition:.2s;display:flex;flex-direction:column}
.news-card:hover{box-shadow:0 12px 30px rgba(0,0,0,.08);transform:translateY(-4px)}
.news-thumb{aspect-ratio:16/9;background:linear-gradient(135deg,#e2e8f0,#f1f5f9);overflow:hidden}
.news-thumb img{width:100%;height:100%;object-fit:cover}
.news-body{padding:20px;flex:1;display:flex;flex-direction:column}
.news-cat{color:var(--pri);font-size:12px;font-weight:700;text-transform:uppercase;margin-bottom:8px}
.news-card h3{font-size:18px;font-weight:700;margin-bottom:10px;line-height:1.35}
.news-card p{color:var(--gray);font-size:14px;flex:1}
.news-meta{display:flex;justify-content:space-between;color:#94a3b8;font-size:13px;margin-top:14px;padding-top:14px;border-top:1px solid var(--bg)}
.cat-filter{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;margin-bottom:40px}
.cat-chip{padding:8px 18px;border-radius:100px;border:1.5px solid var(--line);font-size:14px;font-weight:500;color:var(--gray);transition:.2s}
.cat-chip:hover,.cat-chip.active{background:var(--pri);color:#fff;border-color:var(--pri)}

/* Article detail */
.article{max-width:760px;margin:0 auto}
.article h1{font-size:34px;font-weight:800;line-height:1.25;margin-bottom:16px}
.article-meta{display:flex;gap:16px;color:var(--gray);font-size:14px;margin-bottom:24px;padding-bottom:24px;border-bottom:1px solid var(--line)}
.article-thumb{border-radius:16px;overflow:hidden;margin-bottom:28px}
.article-content{font-size:17px;line-height:1.8;color:#334155}
.article-content p{margin-bottom:18px}
.article-content h2{font-size:26px;font-weight:700;margin:32px 0 14px}
.article-content h3{font-size:21px;font-weight:700;margin:26px 0 12px}
.article-content img{border-radius:12px;margin:20px 0}
.article-content ul,.article-content ol{margin:0 0 18px 24px}

/* Testimonials */
.testi-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.testi{background:#fff;border:1px solid var(--line);border-radius:16px;padding:28px}
.testi-stars{color:#fbbf24;font-size:18px;margin-bottom:14px}
.testi p{color:#475569;font-size:15px;font-style:italic;margin-bottom:20px}
.testi-author{display:flex;align-items:center;gap:12px}
.testi-av{width:46px;height:46px;border-radius:50%;background:linear-gradient(135deg,var(--pri),#fb923c);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:18px}
.testi-author b{display:block;font-size:15px}
.testi-author span{font-size:13px;color:var(--gray)}

/* FAQ */
.faq-wrap{max-width:760px;margin:0 auto}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:12px;overflow:hidden}
.faq-q{padding:18px 20px;font-weight:600;font-size:16px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:12px}
.faq-q::after{content:'+';font-size:22px;color:var(--pri);flex-shrink:0}
.faq-item.open .faq-q::after{content:'−'}
.faq-a{padding:0 20px;max-height:0;overflow:hidden;transition:.3s;color:var(--gray);font-size:15px}
.faq-item.open .faq-a{padding:0 20px 18px;max-height:500px}

/* Screenshots */
.shots{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.shot{border-radius:14px;overflow:hidden;border:1px solid var(--line);background:var(--bg)}
.shot img{width:100%}
.shot-cap{padding:12px 16px;font-size:14px;font-weight:500;text-align:center}

/* Forms */
.form-box{background:#fff;border-radius:20px;box-shadow:0 10px 40px rgba(0,0,0,.08);padding:36px;max-width:560px;margin:0 auto}
.fld{margin-bottom:16px}
.fld label{display:block;font-size:14px;font-weight:600;margin-bottom:6px}
.form-input{width:100%;padding:13px 14px;border:1.5px solid var(--line);border-radius:10px;font-size:15px;font-family:inherit;transition:.2s}
.form-input:focus{outline:none;border-color:var(--pri)}
.req{color:#ef4444}

/* CTA band */
.cta-band{background:var(--nav);color:#fff;text-align:center;border-radius:24px;padding:56px 40px;margin:40px 0}
.cta-band h2{font-size:32px;font-weight:800;margin-bottom:14px}
.cta-band p{color:#cbd5e1;font-size:17px;margin-bottom:28px;max-width:520px;margin-left:auto;margin-right:auto}

/* Contact grid */
.contact-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:40px;align-items:start}
.contact-info{display:flex;flex-direction:column;gap:20px}
.ci-item{display:flex;gap:14px;align-items:flex-start}
.ci-ic{width:46px;height:46px;background:#fff7ed;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:22px;flex-shrink:0}
.ci-item b{display:block;font-size:15px;margin-bottom:2px}
.ci-item span{color:var(--gray);font-size:14px}

/* Footer */
footer{background:var(--nav);color:#cbd5e1;padding:56px 0 30px}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
.foot-logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;color:#fff;margin-bottom:14px}
.foot-desc{font-size:14px;max-width:280px;margin-bottom:14px}
.foot-social{color:#94a3b8;font-size:14px}
.foot-col h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:16px}
.foot-col a{display:block;color:#94a3b8;margin-bottom:10px;font-size:14px}
.foot-col a:hover{color:var(--pri)}
.foot-bot{border-top:1px solid rgba(255,255,255,.1);padding-top:24px;text-align:center;font-size:14px;color:#64748b}

/* Pagination */
.pagination{display:flex;gap:8px;justify-content:center;margin-top:40px}
.pagination a,.pagination span{padding:10px 16px;border-radius:10px;border:1px solid var(--line);font-weight:600;font-size:14px}
.pagination .current{background:var(--pri);color:#fff;border-color:var(--pri)}

@media(max-width:900px){
.hero-grid,.contact-grid{grid-template-columns:1fr}
.hero-vis{display:none}
.feat-grid,.news-grid,.testi-grid,.shots{grid-template-columns:1fr 1fr}
.steps{grid-template-columns:1fr 1fr}
.foot-grid{grid-template-columns:1fr 1fr;gap:28px}
.nav-links{display:none;position:absolute;top:68px;left:0;right:0;flex-direction:column;background:#fff;padding:16px 20px;gap:0;border-bottom:1px solid var(--line);box-shadow:0 10px 30px rgba(0,0,0,.08)}
.nav-links.open{display:flex}
.nav-links a{padding:12px 0;border-bottom:1px solid var(--bg);width:100%}
.nav-links .mobile-login{display:block;color:var(--pri);font-weight:700}
.nav-cta{display:none}
.menu-btn{display:block}
.hero h1{font-size:32px}
.sec-head h2,.page-hero h1{font-size:26px}
.free-band h2{font-size:26px}
section{padding:52px 0}
.hero{padding:52px 0 60px}
}
@media(max-width:560px){
.wrap{padding:0 16px}
.feat-grid,.news-grid,.testi-grid,.shots,.steps,.price-grid,.foot-grid{grid-template-columns:1fr}
.hero-btns{flex-direction:column}
.hero-btns .btn{width:100%;justify-content:center}
.hero-stats{gap:16px;flex-wrap:wrap}
.hero h1{font-size:28px}
.hero p{font-size:16px}
.sec-head h2,.page-hero h1{font-size:23px}
.free-list{flex-direction:column;align-items:center;gap:14px}
.form-box{padding:26px 20px}
.cta-band{padding:40px 24px}
.article h1{font-size:26px}
}

/* Dropdown menu Dịch vụ */
.nav-dropdown{position:relative}
.nav-dropdown::after{content:'';position:absolute;top:100%;left:0;width:100%;height:20px}
.nav-drop-toggle{display:flex;align-items:center;gap:4px;cursor:pointer}
.caret{font-size:11px;transition:.2s}
.nav-dropdown:hover .caret{transform:rotate(180deg)}
.nav-drop-menu{position:absolute;top:calc(100% + 14px);left:0;transform:translateY(10px);background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:0 15px 40px rgba(0,0,0,.12);padding:8px;min-width:320px;opacity:0;visibility:hidden;transition:opacity .2s,visibility .2s,transform .2s;z-index:200}
.nav-dropdown:hover .nav-drop-menu{opacity:1;visibility:visible;transform:translateY(0)}
.nav-drop-menu::before{content:'';position:absolute;top:-6px;left:28px;transform:rotate(45deg);width:12px;height:12px;background:#fff;border-left:1px solid var(--line);border-top:1px solid var(--line)}
.nav-drop-menu a{display:flex;align-items:flex-start;gap:12px;padding:12px 14px;border-radius:10px;transition:.15s}
.nav-drop-menu a:hover{background:var(--bg)}
.drop-ic{width:40px;height:40px;background:linear-gradient(135deg,#fff7ed,#ffedd5);border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0}
.nav-drop-menu a b{display:block;font-size:14px;color:var(--dark);font-weight:700;margin-bottom:2px}
.nav-drop-menu a small{display:block;font-size:12px;color:var(--gray);line-height:1.4}
.nav-drop-menu a span:last-child{min-width:0}

/* Service detail page */
.service-hero{background:linear-gradient(160deg,#0f2942,#1e3a5f);color:#fff;padding:70px 0;position:relative;overflow:hidden}
.service-hero::before{content:'';position:absolute;top:-80px;right:-80px;width:340px;height:340px;background:radial-gradient(circle,rgba(249,115,22,.22),transparent 70%);border-radius:50%}
.service-hero .ic-big{width:80px;height:80px;background:linear-gradient(135deg,var(--pri),#fb923c);border-radius:20px;display:flex;align-items:center;justify-content:center;font-size:42px;margin-bottom:20px}
.service-hero h1{font-size:40px;font-weight:800;margin-bottom:14px}
.service-hero p{font-size:18px;color:#cbd5e1;max-width:640px}
.service-body{display:grid;grid-template-columns:1.4fr .6fr;gap:40px;align-items:start}
.service-content{font-size:16px;line-height:1.8;color:#334155}
.service-content p{margin-bottom:16px}
.service-content h2{font-size:26px;font-weight:700;margin:28px 0 14px;color:var(--dark)}
.service-feats{list-style:none;margin:20px 0}
.service-feats li{display:flex;align-items:flex-start;gap:10px;padding:10px 0;font-size:16px}
.service-feats li::before{content:'✓';color:#22c55e;font-weight:800;flex-shrink:0}
.service-side{background:#fff;border:1px solid var(--line);border-radius:18px;padding:28px;position:sticky;top:90px}
.service-side .price{font-size:14px;color:var(--gray);margin-bottom:4px}
.service-side .price-val{font-size:26px;font-weight:800;color:var(--pri);margin-bottom:20px}
.service-side .btn{width:100%;justify-content:center;margin-bottom:10px}
.service-other{margin-top:16px;padding-top:20px;border-top:1px solid var(--line)}
.service-other h4{font-size:14px;font-weight:700;margin-bottom:12px;color:var(--gray);text-transform:uppercase}
.service-other a{display:flex;align-items:center;gap:10px;padding:10px;border-radius:10px;transition:.15s}
.service-other a:hover{background:var(--bg)}
.service-other .oic{width:34px;height:34px;background:#fff7ed;border-radius:9px;display:flex;align-items:center;justify-content:center;font-size:17px}
.service-other b{font-size:14px;color:var(--dark)}

@media(max-width:900px){
.nav-drop-toggle{padding:12px 0;border-bottom:1px solid var(--bg);width:100%;color:var(--gray);font-weight:500;font-size:15px;justify-content:space-between}
.nav-dropdown{width:100%}
.nav-dropdown .caret{transition:.2s}
.nav-dropdown.open .caret{transform:rotate(180deg)}
.nav-dropdown .nav-drop-menu{position:static;transform:none;opacity:1;visibility:visible;box-shadow:none;border:none;padding:0 0 0 12px;min-width:auto;background:transparent}
.nav-dropdown .nav-drop-menu::before{display:none}
.nav-dropdown.open .nav-drop-menu{display:block}
.nav-dropdown:not(.open) .nav-drop-menu{display:none}
.nav-drop-menu a{padding:11px 0;border-bottom:1px solid var(--bg);gap:10px;align-items:center}
.nav-drop-menu a b{font-size:14px}
.nav-drop-menu a small{display:block;font-size:11px;color:var(--gray);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:220px}
.nav-drop-menu a span:last-child{min-width:0;flex:1;overflow:hidden}
.drop-ic{width:32px;height:32px;font-size:16px}
.service-body{grid-template-columns:1fr}
.service-side{position:static}
.service-hero h1{font-size:30px}
}