/* ============================================================
   HOSTNHANH — site.css (trang công khai). Viết lại sạch v2.0.
   Nguyên tắc điện thoại: full chiều ngang, 1 lớp thẻ, không bảng,
   thanh tab dưới kiểu app, nút ≥ 44px.
============================================================ */
:root{--pri:#1f65c1;--pri-d:#174f98;--pri-l:#e8f0fb;--acc:#0161f5;--cy:#00c2f3;--navy:#071431;
  --ink:#172033;--mut:#5f6b7d;--line:#e3e8ef;--bg:#f4f7fb;--card:#fff;--red:#dc2626;--r:14px;--tab:64px}
*{box-sizing:border-box}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:"Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;color:var(--ink);background:#fff;font-size:16px;line-height:1.55}
img{max-width:100%;height:auto;display:block}
[hidden]{display:none!important}
a{color:var(--acc);text-decoration:none}
h1,h2,h3,h4{line-height:1.25;margin:0}
.wrap{max-width:1200px;margin:0 auto;padding:0 20px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:44px;padding:0 20px;border-radius:10px;border:0;
  background:var(--acc);color:#fff;font:inherit;font-weight:700;font-size:15px;cursor:pointer;transition:transform .1s,background .15s;text-decoration:none}
.btn:hover{background:#0050d4}.btn:active{transform:scale(.97)}
.btn.ghost{background:#fff;color:var(--acc);box-shadow:inset 0 0 0 1.5px var(--acc)}.btn.ghost:hover{background:var(--pri-l)}
.btn.acc{background:var(--acc)}.btn.white{background:#fff;color:var(--acc)}.btn.sm{min-height:38px;padding:0 14px;font-size:14px}.btn.lg{min-height:52px;padding:0 28px;font-size:17px}

/* thanh thông báo */
.annc{background:var(--navy);color:#fff;font-size:14px;display:flex;align-items:center;min-height:38px;padding:0 44px 0 16px;position:relative}
.annc a{color:#fff;display:flex;gap:10px;align-items:center;margin:0 auto;padding:8px 0}
.annc b{background:var(--cy);color:var(--navy);border-radius:20px;padding:2px 10px;font-size:12px;text-transform:uppercase;white-space:nowrap}
.annc button{position:absolute;right:6px;top:50%;transform:translateY(-50%);width:36px;height:36px;background:none;border:0;color:#fff;font-size:22px;cursor:pointer}

/* header */
.hd{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:40}
.hd-in{display:flex;align-items:center;gap:24px;height:68px}
.brand img{height:42px;width:auto}
.hd-nav{display:flex;gap:4px;margin-left:auto}
.hd-nav a{color:var(--ink);font-weight:600;font-size:15px;padding:8px 12px;border-radius:8px}
.hd-nav a:hover{background:var(--bg)}.hd-nav a.on{color:var(--acc);background:var(--pri-l)}
.hd-tel{display:flex;gap:6px;align-items:center;font-weight:700;color:var(--ink);white-space:nowrap}

/* hero trang */
.hero{background:radial-gradient(circle at 90% 120%,rgba(0,194,243,.45),transparent 50%),linear-gradient(135deg,#0a2257 0%,#0161f5 70%);color:#fff;overflow:hidden}
.hero-in{display:grid;grid-template-columns:1.3fr 1fr;gap:40px;align-items:center;padding:56px 20px 60px}
.hero .eb{display:inline-block;background:rgba(255,255,255,.16);border-radius:20px;padding:4px 12px;font-size:13px;font-weight:700;letter-spacing:.04em;text-transform:uppercase;margin-bottom:14px}
.hero h1{font-size:44px;font-weight:800;margin-bottom:14px}
.hero p{font-size:18px;opacity:.92;margin:0 0 24px;max-width:620px}
.hero-bot{justify-self:center;width:100%;max-width:340px;filter:drop-shadow(0 22px 30px rgba(0,0,0,.28));animation:fl 4s ease-in-out infinite}
@keyframes fl{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}
.hero-kpi{display:flex;flex-wrap:wrap;gap:10px 26px;margin-top:22px}
.hero-kpi div b{display:block;font-size:24px}.hero-kpi div span{font-size:14px;opacity:.85}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.chip{background:rgba(255,255,255,.14);color:#fff;border-radius:20px;padding:6px 12px;font-size:14px}.chip b{font-weight:700}

/* tra tên miền */
.search{display:flex;background:#fff;border-radius:12px;overflow:hidden;max-width:620px;box-shadow:0 10px 30px rgba(0,0,0,.15)}
.search input::placeholder{color:#8a94a6}
.search input{flex:1;min-width:0;border:0;outline:0;padding:0 18px;height:56px;font:inherit;font-size:16px;color:var(--ink)}
.search button{border:0;background:var(--cy);color:var(--navy);font:inherit;font-weight:800;padding:0 26px;cursor:pointer}
.dom-kq{margin-top:12px;background:#fff;color:var(--ink);border-radius:12px;padding:14px 16px;max-width:620px;display:flex;flex-wrap:wrap;gap:10px 16px;justify-content:space-between;align-items:center}
.dom-kq span{display:block;color:var(--mut);font-size:14px}.dom-kq-act{display:flex;gap:8px;flex-wrap:wrap}

/* khối nội dung */
.sec{padding:72px 0}.sec.alt{background:var(--bg)}
.sec-hd{text-align:center;max-width:760px;margin:0 auto 36px}
.sec-hd .eb{display:block;color:var(--acc);font-size:13px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;margin-bottom:8px}
.sec-hd h2{font-size:32px;font-weight:800}.sec-hd p{color:var(--mut);margin:10px 0 0}
.sec-hd.bot{display:flex;align-items:center;gap:18px;text-align:left;max-width:none;justify-content:center}
.sec-hd.bot img{width:110px;flex:none}
.note{text-align:center;color:var(--mut);font-size:14px;margin:22px 0 0}

/* thẻ gói */
.pks{display:grid;gap:22px;grid-template-columns:repeat(3,minmax(0,1fr))}.pks.c4{grid-template-columns:repeat(4,minmax(0,1fr))}.pks.c2{grid-template-columns:repeat(2,minmax(0,1fr));max-width:820px;margin:0 auto}
.pk{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:26px 24px;display:flex;flex-direction:column;position:relative}
.pk.hot{border:2px solid var(--acc);box-shadow:0 14px 34px rgba(1,97,245,.12)}
.pk-tag{position:absolute;top:-12px;right:18px;background:var(--acc);color:#fff;font-size:12px;font-weight:700;padding:3px 12px;border-radius:12px}
.pk h3{font-size:18px;color:var(--pri)}
.pk-price{margin:10px 0 4px}.pk-price b{font-size:32px;font-weight:800;white-space:nowrap}.pk-price sup{font-size:15px;margin-left:2px}
.pk-price small{display:block;color:var(--mut);font-size:14px}
.pk ul{list-style:none;padding:0;margin:14px 0 20px;flex:1}
.pk li{padding:7px 0 7px 24px;border-top:1px dashed var(--line);font-size:15px;position:relative}
.pk li:before{content:"✓";position:absolute;left:2px;color:var(--acc);font-weight:800}
.tabs{display:flex;justify-content:center;gap:8px;margin:0 auto 26px;flex-wrap:wrap}
.tabs button{border:1.5px solid var(--line);background:#fff;border-radius:30px;min-height:44px;padding:0 20px;font:inherit;font-weight:700;font-size:15px;cursor:pointer;color:var(--ink)}
.tabs button.on{background:var(--acc);border-color:var(--acc);color:#fff}
.pane-note{text-align:center;color:var(--mut);max-width:720px;margin:-12px auto 26px}

/* tính năng */
.fts{display:grid;gap:18px;grid-template-columns:repeat(3,minmax(0,1fr))}
.ft-it{display:flex;gap:14px;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:20px}
.sec.alt .ft-it{border-color:transparent}
.ft-it i{font-style:normal;font-size:24px;width:48px;height:48px;border-radius:12px;background:var(--pri-l);display:grid;place-items:center;flex:none}
.ft-it b{display:block;font-size:16px;margin-bottom:4px}.ft-it p{margin:0;color:var(--mut);font-size:15px}
.uses{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.uses li{display:flex;gap:12px;align-items:center;background:#fff;border-radius:12px;padding:14px 16px;font-weight:600}.uses i{font-style:normal;font-size:22px}

/* dịch vụ (trang chủ) */
.svs{display:grid;gap:18px;grid-template-columns:repeat(auto-fit,minmax(340px,1fr))}
.sv{display:flex;gap:16px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:18px 20px;color:var(--ink);transition:border-color .15s,transform .15s}
.sv:hover{border-color:var(--acc);transform:translateY(-2px)}
.sv-bot{width:96px;flex:none}
.sv h3{font-size:19px;margin-bottom:4px}.sv p{margin:0 0 6px;color:var(--mut);font-size:15px}
.sv-from{font-size:14px;color:var(--mut)}.sv-from b{color:var(--acc)}
.sv-go{margin-left:auto;font-size:28px;color:var(--acc)}

/* bảng tên miền: máy tính = hàng như bảng; điện thoại = thẻ */
.dm{border:1px solid var(--line);border-radius:var(--r);overflow:hidden;background:#fff}
.dm-h,.dm-r{display:grid;grid-template-columns:1fr 1fr 1fr;align-items:center;padding:0 22px}
.dm-h{background:var(--navy);color:#fff;font-size:14px;font-weight:700;min-height:48px}
.dm-r{min-height:52px;border-top:1px solid var(--line)}.dm-r:nth-child(odd){background:#f9fbfe}
.dm-r b{font-size:17px}.dm-r span:nth-child(2){color:var(--acc);font-weight:700}
.dm-r em{display:none}
.dgs{display:grid;gap:26px}.dg h3{font-size:20px}.dg p{color:var(--mut);margin:4px 0 12px}

/* sự kiện */
.event{background:linear-gradient(120deg,#e8f0fb,#dff4fc)}
.ev{display:grid;grid-template-columns:200px 1fr auto;gap:28px;align-items:center;padding:30px 20px}
.ev-tag{display:inline-block;background:var(--acc);color:#fff;font-size:12px;font-weight:800;text-transform:uppercase;border-radius:20px;padding:4px 12px}
.ev h2{font-size:26px;margin:10px 0 6px}.ev p{margin:0;color:#374151}.ev-han{color:var(--red);font-size:14px;font-weight:700;margin-top:6px}

/* giới thiệu */
.about{display:grid;grid-template-columns:1.1fr 1fr;gap:48px;align-items:center}
.about p{color:#374151}.about h2{font-size:30px;margin-bottom:14px}
.specs{display:grid;grid-template-columns:1fr 1fr;gap:12px}.specs div{background:var(--bg);border-radius:12px;padding:14px 16px}.sec.alt .specs div{background:#fff}
.specs small{display:block;color:var(--mut)}.specs b{color:var(--pri-d)}

/* quy trình */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}
.st{background:#fff;border-radius:var(--r);padding:20px}.st>b{width:38px;height:38px;border-radius:50%;background:var(--acc);color:#fff;display:grid;place-items:center}
.st h4{margin:12px 0 4px}.st p{margin:0;color:var(--mut);font-size:14px}

/* hỏi đáp */
.faq{max-width:860px;margin:0 auto}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:16px;padding:18px 4px;font-weight:700;font-size:16px;min-height:44px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--acc);font-size:24px;line-height:1}.faq details[open] summary::after{content:"–"}
.faq details p{margin:0 4px 18px;color:#374151}

/* CTA */
.cta{background:linear-gradient(135deg,#0a2257,#0161f5);color:#fff}
.cta-in{display:flex;align-items:center;gap:24px;padding:40px 20px}
.cta-in img{width:140px;flex:none;margin:-40px 0 -40px}
.cta h2{font-size:26px}.cta p{margin:6px 0 0;opacity:.9}.cta .btn{margin-left:auto}

/* trang tài liệu */
.doc{max-width:860px;margin:0 auto;padding:48px 20px}
.doc h1{font-size:32px}.doc h2{font-size:20px;margin:28px 0 8px;color:var(--pri-d)}.doc li{margin:6px 0}.doc .lead{color:var(--mut)}
.contact{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.contact a,.contact div{display:block;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:22px;color:var(--ink)}
.contact i{font-style:normal;font-size:28px}.contact b{display:block;margin:8px 0 2px}.contact span{color:var(--mut)}

/* footer */
.ft{background:var(--navy);color:#b8c4d8;font-size:15px}
.ft-in{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:30px;padding:48px 20px 30px}
.ft-brand img{height:46px;width:auto;margin-bottom:12px}.ft-brand p{margin:0;max-width:340px}
.ft h4{color:#fff;font-size:15px;margin-bottom:10px}
.ft a,.ft span{display:block;color:#b8c4d8;padding:5px 0}.ft a:hover{color:#fff}
.ft-copy{border-top:1px solid rgba(255,255,255,.1);padding:16px 20px;font-size:13px;color:#7e8aa3}

/* thanh tab + bảng dịch vụ (chỉ điện thoại) */
.tabbar{display:none}.sheet{display:none}

/* nút hỗ trợ nổi */
.hn-sp{position:fixed;right:18px;bottom:18px;z-index:60}
.hn-sp-btn{width:78px;height:78px;border-radius:50%;border:0;padding:0;cursor:pointer;background:radial-gradient(circle at 50% 40%,#fff,#dbeafe 72%);box-shadow:0 10px 26px rgba(1,97,245,.35);overflow:hidden;display:grid;place-items:center}
.hn-sp-btn img{width:90%;height:auto;margin-top:10px}
.hn-sp-tip{position:absolute;right:88px;bottom:22px;background:#fff;border:1px solid var(--line);border-radius:14px 14px 4px 14px;padding:9px 14px;white-space:nowrap;box-shadow:0 8px 20px rgba(0,0,0,.1);font-weight:700;font-size:14px;opacity:0;transition:.25s;pointer-events:none}
.hn-sp.tip .hn-sp-tip{opacity:1}
.hn-sp-panel{position:absolute;right:0;bottom:90px;width:330px;background:#fff;border-radius:18px;box-shadow:0 18px 50px rgba(7,20,49,.25);overflow:hidden;opacity:0;transform:translateY(10px);pointer-events:none;transition:.2s}
.hn-sp.open .hn-sp-panel{opacity:1;transform:none;pointer-events:auto}
.hn-sp-hd{display:flex;gap:12px;align-items:center;background:linear-gradient(135deg,#0a2257,#0161f5);color:#fff;padding:14px 46px 14px 14px;position:relative}
.hn-sp-hd img{width:62px;height:auto;flex:none}.hn-sp-hd b{display:block;font-size:17px}.hn-sp-hd span{font-size:14px;opacity:.9}
.hn-sp-x{position:absolute;right:10px;top:10px;width:32px;height:32px;border-radius:50%;border:0;background:rgba(255,255,255,.15);color:#fff;font-size:18px;cursor:pointer}
.hn-sp-panel a{display:flex;gap:12px;align-items:center;min-height:50px;padding:0 18px;border-top:1px solid var(--line);color:var(--ink);font-weight:600;font-size:15px}
.hn-sp-panel a:hover{background:var(--pri-l)}.hn-sp-panel a i{font-style:normal;width:24px;text-align:center}

/* ===== máy tính bảng ===== */
@media(max-width:1080px){
  .hd-tel{display:none}.pks.c4{grid-template-columns:repeat(2,minmax(0,1fr))}.steps{grid-template-columns:repeat(3,1fr)}.ft-in{grid-template-columns:1fr 1fr}
}
/* ===== điện thoại: kiểu app ===== */
@media(max-width:860px){
  body{font-size:15px}
  body.has-tabbar{padding-bottom:calc(var(--tab) + env(safe-area-inset-bottom))}
  .wrap{padding:0 16px}
  .hd-in{height:58px;gap:12px}.brand img{height:34px}.hd-nav{display:none}.hd-login{margin-left:auto;min-height:38px;padding:0 14px;font-size:14px}
  .annc{font-size:13px;padding-left:12px}.annc a{margin:0}.annc b{display:none}
  .hero-in{grid-template-columns:1fr;gap:10px;padding:28px 16px 30px}
  .hero h1{font-size:28px}.hero p{font-size:15px;margin-bottom:18px}
  .hero-bot{order:-1;max-width:150px;justify-self:start;margin:-6px 0 -4px}
  .hero-kpi div b{font-size:19px}
  .search input{height:52px;padding:0 14px}.search button{padding:0 18px}
  .sec{padding:36px 0}
  .sec-hd{margin-bottom:20px;text-align:left}.sec-hd h2{font-size:23px}.sec-hd p{font-size:14px}
  .sec-hd.bot{justify-content:flex-start}.sec-hd.bot img{width:72px}
  /* thẻ gói: xếp dọc, full ngang, gọn 1 lớp */
  .pks,.pks.c4,.pks.c2{grid-template-columns:1fr;gap:14px}
  .pk{padding:18px 16px;border-radius:12px}
  .pk-hd{display:flex;justify-content:space-between;align-items:flex-start;gap:10px}
  .pk-price{margin:0;text-align:right}.pk-price b{font-size:24px}.pk-price small{font-size:13px}
  .pk ul{margin:10px 0 14px;display:grid;grid-template-columns:1fr 1fr;column-gap:12px}
  .pk li{font-size:13.5px;padding:6px 0 6px 18px;border-top:0}.pk li:before{left:0}
  .pk .btn{width:100%}
  .tabs{justify-content:flex-start;flex-wrap:nowrap;overflow-x:auto;margin:0 -16px 18px;padding:0 16px;scrollbar-width:none}.tabs::-webkit-scrollbar{display:none}
  .tabs button{flex:none;font-size:14px;padding:0 16px}
  .pane-note{text-align:left;margin:-6px 0 16px;font-size:14px}
  .fts,.uses{grid-template-columns:1fr;gap:10px}
  .ft-it{padding:14px;border-radius:12px}.ft-it i{width:42px;height:42px;font-size:21px}.ft-it p{font-size:14px}
  .svs{grid-template-columns:1fr;gap:10px}.sv{padding:12px 14px;gap:12px}.sv-bot{width:70px}.sv h3{font-size:17px}.sv p{font-size:13.5px}
  /* tên miền: thẻ 2 cột, không kẻ bảng */
  .dm{border:0;background:none;display:grid;grid-template-columns:1fr 1fr;gap:10px}
  .dm-h{display:none}
  .dm-r{display:block;background:#fff!important;border:1px solid var(--line);border-radius:12px;padding:12px 14px;min-height:0}
  .dm-r b{display:block;font-size:19px;margin-bottom:4px}
  .dm-r span{display:flex;justify-content:space-between;font-size:14px;padding:2px 0}.dm-r em{display:inline;font-style:normal;color:var(--mut);font-weight:400}
  .ev{grid-template-columns:90px 1fr;gap:14px;padding:22px 16px}.ev img{width:90px}.ev h2{font-size:19px}.ev p{font-size:14px}.ev .btn{grid-column:1/-1;width:100%}
  .about{grid-template-columns:1fr;gap:20px}.about h2{font-size:23px}
  .steps{grid-template-columns:1fr;gap:0;background:#fff;border-radius:12px}
  .st{display:flex;gap:14px;align-items:flex-start;border-radius:0;border-top:1px solid var(--line);padding:14px}.st:first-child{border-top:0}.st>b{flex:none}.st h4{margin:0 0 2px}
  .faq summary{font-size:15px;padding:16px 0}
  .cta-in{flex-wrap:wrap;padding:28px 16px}.cta-in img{display:none}.cta h2{font-size:21px}.cta .btn{width:100%;margin:0}
  .contact{grid-template-columns:1fr;gap:10px}.contact a,.contact div{padding:16px}
  .doc{padding:28px 16px}.doc h1{font-size:25px}
  .ft-in{grid-template-columns:1fr;gap:20px;padding:30px 16px 20px}
  .ft-copy{padding:14px 16px}
  /* thanh tab dưới */
  .tabbar{display:grid;grid-template-columns:repeat(5,1fr);position:fixed;left:0;right:0;bottom:0;z-index:70;background:rgba(255,255,255,.97);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom);box-shadow:0 -6px 20px rgba(7,20,49,.06)}
  .tabbar a{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;height:var(--tab);color:var(--mut);font-size:11.5px;font-weight:600}
  .tabbar a i{font-style:normal;font-size:22px;line-height:1;filter:grayscale(1);opacity:.7}
  .tabbar a.on{color:var(--acc)}.tabbar a.on i{filter:none;opacity:1}
  .sheet{display:block;position:fixed;inset:0;z-index:80;pointer-events:none;visibility:hidden;transition:visibility 0s .25s}
  .sheet.open{visibility:visible;transition:none}
  .sheet-bg{position:absolute;inset:0;background:rgba(7,20,49,.45);opacity:0;transition:.2s}
  .sheet-card{position:absolute;left:0;right:0;bottom:0;background:#fff;border-radius:20px 20px 0 0;padding:6px 0 calc(12px + env(safe-area-inset-bottom));transform:translateY(100%);transition:.25s;max-height:85vh;overflow:auto}
  .sheet.open{pointer-events:auto}.sheet.open .sheet-bg{opacity:1}.sheet.open .sheet-card{transform:none}
  .sheet-hd{display:flex;justify-content:space-between;align-items:center;padding:10px 16px}.sheet-hd b{font-size:17px}
  .sheet-hd button{width:40px;height:40px;border:0;border-radius:50%;background:var(--bg);font-size:20px;cursor:pointer}
  .sheet-it{display:flex;gap:12px;align-items:center;padding:10px 16px;border-top:1px solid var(--line);color:var(--ink)}
  .sheet-it img{width:54px;flex:none}.sheet-it b{display:block}.sheet-it small{color:var(--mut);font-size:13px;line-height:1.4;display:block}
  /* hỗ trợ: dùng tab "Hỗ trợ", ẩn nút nổi */
  .has-tabbar .hn-sp{right:0;left:0;bottom:calc(var(--tab) + env(safe-area-inset-bottom))}
  .has-tabbar .hn-sp-btn,.has-tabbar .hn-sp-tip{display:none}
  .has-tabbar .hn-sp-panel{position:static;width:auto;border-radius:18px 18px 0 0;display:none}
  .has-tabbar .hn-sp.open .hn-sp-panel{display:block}
}
@media (prefers-reduced-motion:reduce){.hero-bot{animation:none}*{scroll-behavior:auto}}