:root{
  --blue:#0a3d91;--blue2:#1565d8;--blue-d:#072a66;--sky:#e8f1ff;
  --ink:#15233b;--muted:#5d6b82;--line:#e2e8f2;--bg:#f6f9ff;--gold:#f5c542;
  --radius:16px;--shadow:0 10px 30px rgba(10,61,145,.10);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Be Vietnam Pro',system-ui,sans-serif;color:var(--ink);background:var(--bg);line-height:1.6}
.container{width:min(1140px,92%);margin:0 auto}
a{color:inherit;text-decoration:none}
img{max-width:100%}

/* Buttons */
.btn{border:0;cursor:pointer;font-family:inherit;font-weight:600;font-size:15px;padding:11px 20px;border-radius:10px;transition:.18s;display:inline-flex;align-items:center;gap:8px;justify-content:center}
.btn-lg{padding:14px 28px;font-size:16px}
.btn-primary{background:linear-gradient(135deg,var(--blue2),var(--blue));color:#fff}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-1px)}
.btn-outline{background:transparent;border:2px solid #fff;color:#fff}
.btn-outline:hover{background:#fff;color:var(--blue)}
.btn-ghost{background:transparent;color:var(--blue);border:1.5px solid var(--line)}
.btn-ghost:hover{border-color:var(--blue2);background:var(--sky)}
.btn-zalo{background:#0068ff;color:#fff;margin-top:18px}
.btn-zalo:hover{filter:brightness(1.08)}

/* Nav */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.logo{display:flex;align-items:baseline;gap:6px}
.logo-mark{font-weight:800;font-size:24px;color:var(--blue);letter-spacing:1px}
.logo-sub{font-weight:600;color:var(--blue2);font-size:14px}
.nav-links{display:flex;gap:26px;font-weight:500}
.nav-links a:hover{color:var(--blue2)}
.nav-actions{display:flex;gap:10px}

/* Hero */
.hero{background:linear-gradient(135deg,var(--blue-d),var(--blue) 55%,var(--blue2));color:#fff;padding:64px 0 80px;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;background:radial-gradient(circle,rgba(255,255,255,.12),transparent 70%);border-radius:50%}
.hero-inner{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center;position:relative;z-index:1}
.badge{display:inline-block;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.25);padding:6px 14px;border-radius:30px;font-size:13px;font-weight:500;margin-bottom:18px}
.hero h1{font-size:46px;font-weight:800;line-height:1.15;margin-bottom:16px}
.hero .hl{color:var(--gold)}
.lead{font-size:18px;color:#dce8ff;max-width:540px;margin-bottom:26px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.hero-stats{display:flex;gap:34px;margin-top:38px}
.hero-stats strong{display:block;font-size:24px;color:var(--gold)}
.hero-stats span{font-size:13px;color:#cfe0ff}

/* Hero doc card */
.hero-card{display:flex;justify-content:center}
.doc-card{background:#fff;color:var(--ink);width:330px;border-radius:14px;padding:26px 24px;box-shadow:0 24px 60px rgba(0,0,0,.3);border-top:6px solid var(--gold);position:relative;transform:rotate(1.5deg)}
.doc-flag{text-align:center;font-size:10px;font-weight:700;color:var(--blue-d);line-height:1.3}
.doc-flag small{font-weight:500}
.doc-seal{width:54px;height:54px;border-radius:50%;background:radial-gradient(circle,#c81f1f,#8b0000);color:var(--gold);display:flex;align-items:center;justify-content:center;font-size:28px;margin:14px auto}
.doc-card h3{text-align:center;color:var(--blue);font-size:16px;margin-bottom:16px}
.doc-list{list-style:none;font-size:13px}
.doc-list li{padding:7px 0 7px 24px;border-bottom:1px dashed var(--line);position:relative;color:var(--muted)}
.doc-list li::before{content:"✓";position:absolute;left:0;color:var(--blue2);font-weight:700}

/* Sections */
section{padding:72px 0}
.section-title{font-size:32px;font-weight:800;text-align:center;color:var(--ink)}
.section-title.left{text-align:left}
.section-sub{text-align:center;color:var(--muted);margin:10px 0 38px;font-size:16px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}

/* Services */
.services{background:#fff}
.service-card{padding:30px 26px;text-align:center;transition:.2s}
.service-card:hover{transform:translateY(-6px);border-color:var(--blue2)}
.service-card .ic{font-size:40px;margin-bottom:12px}
.service-card h3{color:var(--blue);font-size:20px;margin-bottom:8px}
.service-card p{color:var(--muted);font-size:14px;min-height:60px}
.price-tag{margin-top:14px;font-weight:700;color:var(--blue2);background:var(--sky);padding:8px;border-radius:8px}

/* Pricing table */
.table-wrap{overflow-x:auto;border-radius:var(--radius);box-shadow:var(--shadow)}
.price-table{width:100%;border-collapse:collapse;background:#fff;min-width:680px}
.price-table th,.price-table td{padding:18px 20px;text-align:center;border-bottom:1px solid var(--line)}
.price-table thead th{background:linear-gradient(135deg,var(--blue),var(--blue2));color:#fff;font-size:15px}
.price-table th:first-child,.price-table td:first-child{text-align:left;font-weight:600;color:var(--ink)}
.price-table tbody tr:hover{background:var(--sky)}
.price-table .amt{font-weight:700;color:var(--blue2)}
.price-table .small{font-size:13px;color:var(--muted)}
.note{margin-top:14px;color:var(--muted);font-size:13px;text-align:center}

/* Process */
.process{background:var(--sky)}
.step{background:#fff;border-radius:var(--radius);padding:26px 22px;text-align:center;box-shadow:var(--shadow);position:relative}
.step span{display:flex;width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,var(--blue2),var(--blue));color:#fff;font-weight:700;align-items:center;justify-content:center;margin:0 auto 12px;font-size:18px}
.step h4{color:var(--blue);margin-bottom:6px}
.step p{font-size:14px;color:var(--muted)}

/* Contact */
.contact{background:#fff}
.contact-list{list-style:none;margin:18px 0}
.contact-list li{padding:10px 0;display:flex;gap:12px;align-items:flex-start;color:var(--ink)}
.contact-list .ci{font-size:20px}
.contact-form{padding:28px}
.contact-form h3{color:var(--blue);margin-bottom:16px}
.contact-form input,.contact-form select,.contact-form textarea,.auth-form input{width:100%;padding:12px 14px;border:1.5px solid var(--line);border-radius:10px;font-family:inherit;font-size:15px;margin-bottom:12px}
.contact-form input:focus,.contact-form textarea:focus,.auth-form input:focus{outline:none;border-color:var(--blue2)}
.form-msg{font-size:14px;margin-top:6px;min-height:18px}
.form-msg.ok{color:#127a3e}.form-msg.err{color:#c0392b}

/* Footer */
.footer{background:var(--blue-d);color:#cfe0ff;padding:48px 0 0}
.footer-inner{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:30px;padding-bottom:30px}
.footer .logo-mark{color:#fff}.footer .logo-sub{color:var(--gold)}
.footer a:hover{color:#fff}
.footer p{font-size:14px;margin-top:10px;color:#9fb6e0}
.footer h5{color:#fff;margin-bottom:10px}
.copyright{border-top:1px solid rgba(255,255,255,.12);text-align:center;padding:18px;font-size:13px;color:#9fb6e0}

/* Modal */
.modal{position:fixed;inset:0;background:rgba(10,30,70,.55);display:flex;align-items:center;justify-content:center;z-index:100;padding:16px}
.modal[hidden]{display:none}
.modal-box{background:#fff;border-radius:18px;width:min(420px,100%);padding:30px;position:relative}
.modal-close{position:absolute;right:16px;top:12px;border:0;background:none;font-size:28px;cursor:pointer;color:var(--muted)}
.tabs{display:flex;gap:8px;margin-bottom:20px;background:var(--sky);padding:5px;border-radius:12px}
.tab{flex:1;border:0;background:none;padding:10px;border-radius:9px;font-weight:600;cursor:pointer;color:var(--muted)}
.tab.active{background:#fff;color:var(--blue);box-shadow:var(--shadow)}
.auth-form .btn{width:100%;margin-top:4px}

/* Chat widget */
.chat-fab{position:fixed;right:22px;bottom:22px;width:60px;height:60px;border-radius:50%;border:0;background:linear-gradient(135deg,var(--blue2),var(--blue));color:#fff;font-size:26px;cursor:pointer;box-shadow:0 10px 26px rgba(10,61,145,.4);z-index:90}
.chat-fab:hover{transform:scale(1.06)}
.chat-panel{position:fixed;right:22px;bottom:94px;width:min(370px,92vw);height:520px;max-height:78vh;background:#fff;border-radius:18px;box-shadow:0 24px 70px rgba(10,30,70,.35);display:flex;flex-direction:column;overflow:hidden;z-index:91}
.chat-panel[hidden]{display:none}
.chat-head{background:linear-gradient(135deg,var(--blue),var(--blue2));color:#fff;padding:14px 18px;display:flex;justify-content:space-between;align-items:center}
.chat-head span{display:block;font-size:12px;color:#cfe0ff}
.chat-head button{background:none;border:0;color:#fff;font-size:24px;cursor:pointer}
.chat-body{flex:1;overflow-y:auto;padding:16px;background:var(--bg);display:flex;flex-direction:column;gap:10px}
.msg{max-width:82%;padding:10px 14px;border-radius:14px;font-size:14px;white-space:pre-wrap;line-height:1.5}
.msg.bot{background:#fff;border:1px solid var(--line);align-self:flex-start;border-bottom-left-radius:4px}
.msg.user{background:linear-gradient(135deg,var(--blue2),var(--blue));color:#fff;align-self:flex-end;border-bottom-right-radius:4px}
.msg.typing{color:var(--muted);font-style:italic}
.zalo-cta{align-self:flex-start;margin-top:2px}
.zalo-cta a{display:inline-block;background:#0068ff;color:#fff;padding:9px 16px;border-radius:10px;font-size:13px;font-weight:600}
.chat-quick{display:flex;gap:6px;flex-wrap:wrap;padding:8px 12px;background:#fff;border-top:1px solid var(--line)}
.chat-quick button{font-size:12px;border:1px solid var(--line);background:var(--sky);color:var(--blue);padding:6px 10px;border-radius:14px;cursor:pointer}
.chat-input{display:flex;border-top:1px solid var(--line);background:#fff}
.chat-input input{flex:1;border:0;padding:14px;font-family:inherit;font-size:14px}
.chat-input input:focus{outline:none}
.chat-input button{border:0;background:var(--blue2);color:#fff;width:52px;font-size:18px;cursor:pointer}

/* user chip when logged in */
.user-chip{display:flex;align-items:center;gap:10px}
.user-chip .uname{font-weight:600;color:var(--blue)}
.voucher-pill{background:var(--gold);color:#5a4500;font-weight:700;padding:5px 12px;border-radius:20px;font-size:13px}

@media(max-width:880px){
  .hero-inner,.grid-2{grid-template-columns:1fr}
  .grid-3{grid-template-columns:1fr}
  .grid-4{grid-template-columns:1fr 1fr}
  .footer-inner{grid-template-columns:1fr}
  .nav-links{display:none}
  .hero h1{font-size:34px}
  .hero-card{order:-1}
}