/* roulang page: index */
:root{
  --xanh-chinh:#1B6DE0;
  --xanh-dam:#0B4FB3;
  --xanh-nhat:#E8F1FD;
  --xanh-vien:#C9DDF7;
  --nen:#F5F8FC;
  --trang:#FFFFFF;
  --chu:#152238;
  --chu-phu:#5A6B85;
  --cam:#FF8A3D;
  --xanh-la:#1FA45B;
  --bo-goc:14px;
  --bo-goc-nho:10px;
  --bong:0 8px 28px rgba(21,73,153,.10);
  --bong-dam:0 14px 38px rgba(21,73,153,.18);
  --khoang:88px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"Segoe UI","Helvetica Neue",Arial,"Noto Sans",sans-serif;
  background:var(--nen);
  color:var(--chu);
  line-height:1.65;
  font-size:16px;
}
img{max-width:100%;display:block}
a{color:var(--xanh-chinh);text-decoration:none;transition:color .2s}
a:hover{color:var(--xanh-dam)}
button{font-family:inherit;cursor:pointer;border:none;background:none}
input{font-family:inherit}
.container{max-width:1180px;margin:0 auto;padding:0 24px}

/* ===== Header ===== */
.site-header{position:sticky;top:0;z-index:200;background:var(--trang);box-shadow:0 2px 14px rgba(21,73,153,.08)}
.header-top{display:flex;align-items:center;gap:20px;padding:14px 0}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-mark{width:42px;height:42px;border-radius:50%;background:conic-gradient(var(--xanh-chinh) 0 25%,var(--cam) 25% 50%,var(--xanh-la) 50% 75%,#FFC53D 75% 100%);position:relative;box-shadow:0 3px 10px rgba(27,109,224,.35)}
.logo-mark::after{content:"";position:absolute;inset:12px;background:var(--trang);border-radius:50%}
.logo-text{font-weight:800;font-size:1.05rem;line-height:1.25;color:var(--chu)}
.logo-text small{display:block;font-size:.68rem;font-weight:600;color:var(--xanh-chinh);letter-spacing:.4px}
.header-search{flex:1;max-width:340px;display:flex;background:var(--xanh-nhat);border:1px solid var(--xanh-vien);border-radius:999px;overflow:hidden}
.header-search input{flex:1;border:none;background:transparent;padding:9px 16px;font-size:.9rem;color:var(--chu);outline:none}
.header-search input:focus{background:#fff}
.header-search button{padding:0 18px;color:var(--xanh-chinh);font-size:1rem;transition:background .2s}
.header-search button:hover{background:var(--xanh-vien)}
.header-auth{margin-left:auto;display:flex;align-items:center;gap:10px;flex-shrink:0}
.btn-dangnhap{color:var(--xanh-chinh);font-weight:600;font-size:.92rem;padding:8px 12px;border-radius:8px;transition:background .2s}
.btn-dangnhap:hover{background:var(--xanh-nhat)}
.btn-dangky{background:linear-gradient(135deg,var(--xanh-chinh),var(--xanh-dam));color:#fff;font-weight:700;font-size:.92rem;padding:9px 20px;border-radius:999px;box-shadow:0 4px 14px rgba(27,109,224,.35);transition:transform .2s,box-shadow .2s;display:inline-block}
.btn-dangky:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(27,109,224,.45);color:#fff}
.btn-dangky:active{transform:translateY(0)}
.main-nav{border-top:1px solid #EDF2FA}
.main-nav ul{display:flex;list-style:none;gap:4px;overflow-x:auto}
.main-nav a{display:block;padding:12px 18px;font-weight:600;font-size:.94rem;color:var(--chu-phu);border-bottom:3px solid transparent;white-space:nowrap;transition:color .2s,border-color .2s}
.main-nav a:hover{color:var(--xanh-chinh)}
.main-nav a.active{color:var(--xanh-chinh);border-bottom-color:var(--xanh-chinh)}
.nav-hot{display:flex;align-items:center;gap:8px;margin-left:auto;padding:8px 0;font-size:.82rem;color:var(--chu-phu);white-space:nowrap}
.nav-hot .tag-hot{background:#FFF1E8;color:var(--cam);font-weight:700;padding:3px 10px;border-radius:999px;font-size:.75rem}

/* ===== Hero ===== */
.hero{background:linear-gradient(180deg,#FFFFFF 0%,var(--nen) 100%);padding:72px 0 64px;border-bottom:1px solid #EDF2FA}
.hero-status{display:inline-flex;align-items:center;gap:8px;background:var(--trang);border:1px solid var(--xanh-vien);border-radius:999px;padding:7px 18px;font-size:.85rem;font-weight:600;color:var(--xanh-dam);box-shadow:var(--bong);margin-bottom:26px}
.hero-status .dot{width:9px;height:9px;border-radius:50%;background:var(--xanh-la);animation:nhay 1.6s infinite}
@keyframes nhay{0%,100%{opacity:1}50%{opacity:.35}}
.hero h1{font-size:2.35rem;line-height:1.28;font-weight:800;max-width:820px;margin:0 auto 18px;color:var(--chu)}
.hero h1 em{font-style:normal;color:var(--xanh-chinh)}
.hero-desc{max-width:700px;margin:0 auto 32px;color:var(--chu-phu);font-size:1.05rem}
.hero-cta{display:flex;justify-content:center;gap:14px;flex-wrap:wrap;margin-bottom:44px}
.btn-lon{display:inline-flex;align-items:center;gap:8px;padding:14px 32px;border-radius:999px;font-weight:700;font-size:1rem;transition:transform .2s,box-shadow .2s}
.btn-lon.chinh{background:linear-gradient(135deg,var(--xanh-chinh),var(--xanh-dam));color:#fff;box-shadow:0 6px 18px rgba(27,109,224,.4)}
.btn-lon.chinh:hover{transform:translateY(-3px);box-shadow:0 12px 26px rgba(27,109,224,.5);color:#fff}
.btn-lon.phu{background:var(--trang);color:var(--xanh-dam);border:1.5px solid var(--xanh-vien)}
.btn-lon.phu:hover{border-color:var(--xanh-chinh);background:var(--xanh-nhat)}
.hero{text-align:center}
.hero-icons{display:grid;grid-template-columns:repeat(6,1fr);gap:16px;max-width:920px;margin:0 auto}
.hero-icon{background:var(--trang);border:1px solid #EDF2FA;border-radius:var(--bo-goc);padding:20px 12px;box-shadow:var(--bong);transition:transform .25s,box-shadow .25s}
.hero-icon:hover{transform:translateY(-5px);box-shadow:var(--bong-dam)}
.hero-icon .ico{font-size:1.7rem;margin-bottom:8px}
.hero-icon strong{display:block;font-size:1.1rem;color:var(--xanh-dam)}
.hero-icon span{font-size:.78rem;color:var(--chu-phu)}

/* ===== Sections chung ===== */
.section{padding:var(--khoang) 0}
.section-alt{background:var(--trang)}
.section-head{max-width:640px;margin-bottom:40px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.section-kicker{display:inline-block;background:var(--xanh-nhat);color:var(--xanh-dam);font-weight:700;font-size:.78rem;letter-spacing:.6px;text-transform:uppercase;padding:5px 14px;border-radius:999px;margin-bottom:14px}
.section-head h2{font-size:1.8rem;font-weight:800;line-height:1.3;margin-bottom:12px}
.section-head p{color:var(--chu-phu)}

/* ===== Danh mục series ===== */
.series-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.series-card{background:var(--trang);border-radius:var(--bo-goc);overflow:hidden;box-shadow:var(--bong);transition:transform .25s,box-shadow .25s;display:flex;flex-direction:column}
.series-card:hover{transform:translateY(-6px);box-shadow:var(--bong-dam)}
.series-card img{height:180px;width:100%;object-fit:cover}
.series-body{padding:22px 24px 26px;display:flex;flex-direction:column;gap:10px;flex:1}
.series-body h3{font-size:1.15rem;font-weight:700}
.series-body p{font-size:.92rem;color:var(--chu-phu);flex:1}
.series-link{font-weight:700;font-size:.92rem;color:var(--xanh-chinh);display:inline-flex;align-items:center;gap:6px}
.series-link:hover{gap:10px}

/* ===== Top 5 ===== */
.top5-wrap{display:grid;grid-template-columns:1.6fr 1fr;gap:40px;align-items:start}
.top5-list{display:flex;flex-direction:column;gap:18px}
.top5-item{background:var(--trang);border:1px solid #EDF2FA;border-radius:var(--bo-goc);padding:22px 24px;display:flex;gap:20px;box-shadow:var(--bong);transition:box-shadow .25s,border-color .25s}
.top5-item:hover{box-shadow:var(--bong-dam);border-color:var(--xanh-vien)}
.top5-rank{width:52px;height:52px;flex-shrink:0;border-radius:12px;background:var(--xanh-nhat);color:var(--xanh-dam);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:1.3rem}
.top5-item.no1 .top5-rank{background:linear-gradient(135deg,var(--xanh-chinh),var(--xanh-dam));color:#fff}
.top5-info h3{font-size:1.08rem;font-weight:700;display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.badge-goiy{background:#E7F7EE;color:var(--xanh-la);font-size:.72rem;font-weight:700;padding:3px 10px;border-radius:999px}
.top5-info p{font-size:.9rem;color:var(--chu-phu);margin-top:6px}
.top5-meta{display:flex;gap:16px;margin-top:10px;font-size:.8rem;color:var(--xanh-dam);font-weight:600;flex-wrap:wrap}
.top5-side{background:var(--trang);border-radius:var(--bo-goc);box-shadow:var(--bong);overflow:hidden;position:sticky;top:130px}
.top5-side img{height:190px;width:100%;object-fit:cover}
.top5-side-body{padding:24px}
.top5-side-body h3{font-size:1.1rem;margin-bottom:10px}
.top5-side-body p{font-size:.9rem;color:var(--chu-phu);margin-bottom:18px}
.top5-side-body ul{list-style:none;display:flex;flex-direction:column;gap:10px;margin-bottom:20px}
.top5-side-body li{font-size:.88rem;padding-left:26px;position:relative;color:var(--chu)}
.top5-side-body li::before{content:"✓";position:absolute;left:0;color:var(--xanh-la);font-weight:800}

/* ===== Live event ===== */
.live-section{position:relative;background:url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;border-radius:20px;overflow:hidden}
.live-overlay{background:linear-gradient(100deg,rgba(11,35,72,.93) 30%,rgba(11,50,110,.82));padding:56px 48px;display:grid;grid-template-columns:1.2fr 1fr;gap:44px;align-items:center}
.live-left .live-tag{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.14);color:#FFD8BE;font-weight:700;font-size:.8rem;padding:6px 16px;border-radius:999px;margin-bottom:18px}
.live-left .live-tag .dot{width:8px;height:8px;border-radius:50%;background:#FF5A5A;animation:nhay 1.2s infinite}
.live-left h2{color:#fff;font-size:1.7rem;line-height:1.35;margin-bottom:14px}
.live-left p{color:#C9DCF8;font-size:.95rem;margin-bottom:22px}
.live-points{list-style:none;display:flex;flex-direction:column;gap:12px}
.live-points li{color:#EAF2FF;font-size:.92rem;padding-left:30px;position:relative}
.live-points li::before{content:"▸";position:absolute;left:8px;color:var(--cam);font-weight:800}
.live-right{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);border-radius:var(--bo-goc);padding:30px;backdrop-filter:blur(4px)}
.live-right h3{color:#fff;font-size:1.05rem;margin-bottom:6px}
.live-right .live-sub{color:#B9CFF2;font-size:.85rem;margin-bottom:20px}
.countdown{display:flex;gap:12px;margin-bottom:24px}
.count-box{flex:1;background:rgba(255,255,255,.12);border-radius:10px;padding:14px 6px;text-align:center}
.count-box b{display:block;color:#fff;font-size:1.5rem;font-weight:800}
.count-box span{color:#AFC8EF;font-size:.72rem;text-transform:uppercase;letter-spacing:.5px}
.live-form{display:flex;gap:10px}
.live-form input{flex:1;border:none;border-radius:999px;padding:12px 18px;font-size:.9rem;outline:none}
.live-form input:focus{box-shadow:0 0 0 3px rgba(255,138,61,.45)}
.live-form button{background:var(--cam);color:#fff;font-weight:700;padding:12px 24px;border-radius:999px;font-size:.9rem;transition:transform .2s,filter .2s}
.live-form button:hover{transform:translateY(-2px);filter:brightness(1.08)}
.live-note{color:#9DB9E6;font-size:.75rem;margin-top:12px}

/* ===== Các bước ===== */
.steps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.step-item{position:relative;background:var(--trang);border-radius:var(--bo-goc);padding:28px 24px;box-shadow:var(--bong)}
.step-num{width:40px;height:40px;border-radius:50%;background:var(--xanh-nhat);color:var(--xanh-dam);font-weight:800;display:flex;align-items:center;justify-content:center;margin-bottom:16px;font-size:1.05rem}
.step-item h3{font-size:1rem;margin-bottom:8px}
.step-item p{font-size:.88rem;color:var(--chu-phu)}

/* ===== Lợi ích ===== */
.benefit-wrap{display:grid;grid-template-columns:1fr 1.25fr;gap:48px;align-items:center}
.benefit-img{border-radius:var(--bo-goc);overflow:hidden;box-shadow:var(--bong-dam)}
.benefit-img img{height:100%;width:100%;object-fit:cover}
.benefit-list{display:flex;flex-direction:column;gap:22px;margin-top:26px}
.benefit-item{display:flex;gap:16px}
.benefit-ico{width:46px;height:46px;flex-shrink:0;border-radius:12px;background:var(--xanh-nhat);display:flex;align-items:center;justify-content:center;font-size:1.3rem}
.benefit-item h3{font-size:1.02rem;margin-bottom:4px}
.benefit-item p{font-size:.9rem;color:var(--chu-phu)}

/* ===== Tin tức ===== */
.news-wrap{display:grid;grid-template-columns:1.7fr 1fr;gap:40px;align-items:start}
.news-list{background:var(--trang);border-radius:var(--bo-goc);box-shadow:var(--bong);padding:10px 28px}
.news-item{display:flex;align-items:baseline;gap:16px;padding:18px 0;border-bottom:1px solid #EFF4FB}
.news-item:last-child{border-bottom:none}
.news-item a{flex:1;color:var(--chu);font-weight:600;font-size:.96rem;line-height:1.5}
.news-item a:hover{color:var(--xanh-chinh)}
.news-cat{background:var(--xanh-nhat);color:var(--xanh-dam);font-size:.72rem;font-weight:700;padding:3px 12px;border-radius:999px;white-space:nowrap}
.news-date{color:#9AA9C0;font-size:.8rem;white-space:nowrap}
.news-empty{padding:34px 0;text-align:center;color:var(--chu-phu);font-size:.92rem}
.news-side{display:flex;flex-direction:column;gap:22px}
.news-side-card{background:var(--trang);border-radius:var(--bo-goc);box-shadow:var(--bong);overflow:hidden}
.news-side-card img{height:150px;width:100%;object-fit:cover}
.news-side-card .body{padding:20px 22px}
.news-side-card h3{font-size:1rem;margin-bottom:8px}
.news-side-card p{font-size:.86rem;color:var(--chu-phu)}

/* ===== Chủ đề hot ===== */
.topics-cloud{display:flex;flex-wrap:wrap;gap:12px}
.topic-tag{background:var(--trang);border:1px solid var(--xanh-vien);color:var(--xanh-dam);font-weight:600;font-size:.88rem;padding:9px 20px;border-radius:999px;box-shadow:0 3px 10px rgba(21,73,153,.06);transition:background .2s,color .2s,transform .2s}
.topic-tag:hover{background:var(--xanh-chinh);color:#fff;transform:translateY(-2px)}

/* ===== Gói ===== */
.pricing-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;align-items:stretch}
.price-card{background:var(--trang);border-radius:var(--bo-goc);box-shadow:var(--bong);padding:34px 30px;display:flex;flex-direction:column;border:2px solid transparent;transition:transform .25s,box-shadow .25s}
.price-card:hover{transform:translateY(-6px);box-shadow:var(--bong-dam)}
.price-card.noibat{border-color:var(--xanh-chinh);position:relative}
.price-tag-top{position:absolute;top:-14px;left:50%;transform:translateX(-50%);background:linear-gradient(135deg,var(--xanh-chinh),var(--xanh-dam));color:#fff;font-size:.74rem;font-weight:700;padding:5px 18px;border-radius:999px;white-space:nowrap}
.price-card h3{font-size:1.05rem;color:var(--chu-phu);font-weight:700;margin-bottom:10px}
.price-val{font-size:2rem;font-weight:800;color:var(--chu);margin-bottom:4px}
.price-val small{font-size:.85rem;font-weight:600;color:var(--chu-phu)}
.price-desc{font-size:.86rem;color:var(--chu-phu);margin-bottom:22px}
.price-card ul{list-style:none;display:flex;flex-direction:column;gap:11px;margin-bottom:28px;flex:1}
.price-card li{font-size:.89rem;padding-left:26px;position:relative}
.price-card li::before{content:"✓";position:absolute;left:0;color:var(--xanh-la);font-weight:800}
.btn-goi{display:block;text-align:center;padding:12px;border-radius:999px;font-weight:700;font-size:.94rem;border:1.5px solid var(--xanh-vien);color:var(--xanh-dam);transition:all .2s}
.btn-goi:hover{border-color:var(--xanh-chinh);background:var(--xanh-nhat)}
.btn-goi.dam{background:linear-gradient(135deg,var(--xanh-chinh),var(--xanh-dam));color:#fff;border:none;box-shadow:0 5px 16px rgba(27,109,224,.35)}
.btn-goi.dam:hover{filter:brightness(1.08);color:#fff}

/* ===== FAQ ===== */
.faq-wrap{max-width:820px;margin:0 auto}
.faq-item{background:var(--trang);border-radius:var(--bo-goc-nho);box-shadow:var(--bong);margin-bottom:14px;overflow:hidden}
.faq-q{width:100%;display:flex;justify-content:space-between;align-items:center;gap:16px;text-align:left;padding:20px 26px;font-weight:700;font-size:1rem;color:var(--chu);transition:color .2s}
.faq-q:hover{color:var(--xanh-chinh)}
.faq-q .mui{font-size:1.2rem;color:var(--xanh-chinh);transition:transform .3s;flex-shrink:0}
.faq-item.open .faq-q .mui{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-a p{padding:0 26px 22px;color:var(--chu-phu);font-size:.93rem}
.faq-item.open .faq-a{max-height:300px}

/* ===== CTA thành viên ===== */
.member-cta{background:linear-gradient(135deg,var(--xanh-dam),var(--xanh-chinh));border-radius:20px;padding:60px 48px;text-align:center;color:#fff;box-shadow:var(--bong-dam)}
.member-cta h2{font-size:1.75rem;margin-bottom:14px}
.member-cta p{max-width:620px;margin:0 auto 28px;color:#D6E6FC;font-size:.98rem}
.member-cta .btn-lon.trang{background:#fff;color:var(--xanh-dam)}
.member-cta .btn-lon.trang:hover{transform:translateY(-3px);box-shadow:0 10px 24px rgba(0,0,0,.25)}
.member-cta .btn-lon.vien{border:1.5px solid rgba(255,255,255,.5);color:#fff}
.member-cta .btn-lon.vien:hover{background:rgba(255,255,255,.12)}

/* ===== Footer ===== */
.site-footer{background:#0E2A52;color:#B9CDEB;margin-top:var(--khoang)}
.footer-main{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding:56px 0 44px}
.footer-brand .logo-text{color:#fff}
.footer-brand .logo-text small{color:#8FB4E8}
.footer-brand p{font-size:.88rem;margin-top:16px;color:#9DB6DD}
.footer-col h4{color:#fff;font-size:.95rem;margin-bottom:16px}
.footer-col ul{list-style:none;display:flex;flex-direction:column;gap:10px}
.footer-col a{color:#B9CDEB;font-size:.88rem}
.footer-col a:hover{color:#fff}
.footer-col p{font-size:.88rem;color:#9DB6DD}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:20px 0;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:.8rem;color:#8AA6D2}

/* ===== FAB ===== */
.fab{position:fixed;left:16px;bottom:96px;z-index:500;width:60px;height:60px;border-radius:50%;background:var(--trang);border:2px solid var(--xanh-chinh);box-shadow:0 6px 22px rgba(27,109,224,.35);display:flex;align-items:center;justify-content:center;opacity:.85;transition:transform .25s,opacity .25s;animation:fabfloat 3s ease-in-out infinite}
.fab:hover{transform:scale(1.1);opacity:1}
.fab:active{transform:scale(.95)}
.fab .fab-wheel{width:38px;height:38px;border-radius:50%;background:conic-gradient(var(--xanh-chinh) 0 25%,var(--cam) 25% 50%,var(--xanh-la) 50% 75%,#FFC53D 75% 100%);position:relative;transition:transform .6s}
.fab:hover .fab-wheel{transform:rotate(360deg)}
.fab .fab-wheel::after{content:"";position:absolute;inset:12px;background:#fff;border-radius:50%}
.fab .fab-dot{position:absolute;top:2px;right:2px;width:12px;height:12px;border-radius:50%;background:#FF4D4F;border:2px solid #fff}
@keyframes fabfloat{0%,100%{transform:translateY(0)}50%{transform:translateY(-6px)}}

/* ===== Responsive ===== */
@media(max-width:1024px){
  .hero-icons{grid-template-columns:repeat(3,1fr)}
  .top5-wrap,.news-wrap{grid-template-columns:1fr}
  .top5-side{position:static}
  .live-overlay{grid-template-columns:1fr;padding:44px 32px}
  .steps-grid{grid-template-columns:repeat(2,1fr)}
  .benefit-wrap{grid-template-columns:1fr}
  .benefit-img{max-height:320px}
  .footer-main{grid-template-columns:repeat(2,1fr)}
  .header-search{max-width:240px}
}
@media(max-width:768px){
  :root{--khoang:64px}
  .hero h1{font-size:1.75rem}
  .series-grid,.pricing-grid{grid-template-columns:1fr}
  .hero-icons{grid-template-columns:repeat(2,1fr)}
  .header-search{display:none}
  .nav-hot{display:none}
  .member-cta{padding:44px 26px}
}
@media(max-width:520px){
  .container{padding:0 16px}
  .hero{padding:52px 0 48px}
  .hero h1{font-size:1.45rem}
  .steps-grid{grid-template-columns:1fr}
  .footer-main{grid-template-columns:1fr}
  .btn-dangky{padding:8px 14px;font-size:.84rem}
  .btn-dangnhap{padding:8px 8px;font-size:.84rem}
  .logo-text{font-size:.85rem}
  .logo-text small{display:none}
  .live-form{flex-direction:column}
  .news-item{flex-wrap:wrap}
  .top5-item{flex-direction:column;gap:12px}
}

/* roulang page: article */
:root{
  --xanh-chinh:#1D6FE0;
  --xanh-dam:#0F4FB0;
  --xanh-nhat:#E8F1FD;
  --xanh-vien:#C7DCF8;
  --nen-trang:#FFFFFF;
  --nen-page:#F4F8FE;
  --chu-dam:#16233A;
  --chu-thuong:#3E4E68;
  --chu-mo:#7286A3;
  --vien:#E3EBF6;
  --cam-nhan:#FF7A1A;
  --bo-goc:14px;
  --bo-goc-lon:20px;
  --bong-nhe:0 4px 18px rgba(23,70,140,.08);
  --bong-dam:0 12px 34px rgba(23,70,140,.14);
  --khoang:24px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"Segoe UI","Helvetica Neue",Arial,"Roboto",sans-serif;
  background:var(--nen-page);
  color:var(--chu-thuong);
  line-height:1.65;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--xanh-chinh);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--xanh-dam)}
button,input{font-family:inherit;font-size:inherit}
ul{list-style:none}
.container{max-width:1160px;margin:0 auto;padding:0 20px}

/* ===== Header ===== */
.site-header{position:sticky;top:0;z-index:100;background:var(--nen-trang);box-shadow:0 2px 14px rgba(23,70,140,.08)}
.header-top{display:flex;align-items:center;gap:28px;padding:14px 20px}
.logo{display:flex;align-items:center;gap:12px;flex-shrink:0}
.logo-mark{width:42px;height:42px;border-radius:12px;flex-shrink:0;
  background:conic-gradient(var(--xanh-chinh) 0 25%,var(--cam-nhan) 25% 50%,#37B26C 50% 75%,#F5C518 75% 100%);
  position:relative;box-shadow:inset 0 0 0 4px #fff,0 2px 8px rgba(23,70,140,.25)}
.logo-mark::after{content:"";position:absolute;inset:14px;border-radius:50%;background:#fff}
.logo-text{font-weight:800;color:var(--chu-dam);font-size:1.12rem;line-height:1.2;display:flex;flex-direction:column}
.logo-text small{font-weight:600;font-size:.72rem;color:var(--xanh-chinh);letter-spacing:.02em}
.header-search{flex:1;display:flex;max-width:420px;border:1.5px solid var(--vien);border-radius:999px;overflow:hidden;background:var(--nen-page);transition:border-color .2s}
.header-search:focus-within{border-color:var(--xanh-chinh);box-shadow:0 0 0 3px rgba(29,111,224,.12)}
.header-search input{flex:1;border:0;background:transparent;padding:10px 18px;color:var(--chu-dam);outline:none;font-size:.95rem}
.header-search input::placeholder{color:var(--chu-mo)}
.header-search button{border:0;background:var(--xanh-chinh);color:#fff;padding:0 18px;cursor:pointer;transition:background .2s}
.header-search button:hover{background:var(--xanh-dam)}
.header-auth{display:flex;align-items:center;gap:14px;margin-left:auto;flex-shrink:0}
.btn-dangnhap{color:var(--chu-dam);font-weight:600;padding:9px 6px}
.btn-dangnhap:hover{color:var(--xanh-chinh)}
.btn-dangky{background:linear-gradient(135deg,var(--xanh-chinh),var(--xanh-dam));color:#fff;font-weight:700;padding:10px 22px;border-radius:999px;box-shadow:0 4px 14px rgba(29,111,224,.35);transition:transform .2s,box-shadow .2s}
.btn-dangky:hover{color:#fff;transform:translateY(-1px);box-shadow:0 7px 20px rgba(29,111,224,.45)}
.main-nav{border-top:1px solid var(--vien);background:var(--nen-trang)}
.main-nav ul{display:flex;gap:4px;overflow-x:auto;-webkit-overflow-scrolling:touch}
.main-nav ul::-webkit-scrollbar{display:none}
.main-nav ul li a{display:block;padding:13px 16px;font-weight:600;color:var(--chu-thuong);border-bottom:3px solid transparent;white-space:nowrap;font-size:.95rem}
.main-nav ul li a:hover{color:var(--xanh-chinh)}
.main-nav ul li a.active{color:var(--xanh-chinh);border-bottom-color:var(--xanh-chinh)}
.nav-hot{margin-left:auto;font-size:.83rem;color:var(--chu-mo);display:flex;align-items:center;gap:8px;white-space:nowrap;padding-left:16px}
.tag-hot{background:#FFE9DB;color:var(--cam-nhan);font-weight:800;font-size:.7rem;padding:3px 9px;border-radius:999px;letter-spacing:.05em}

/* ===== Breadcrumb ===== */
.breadcrumb-bar{background:var(--nen-trang);border-bottom:1px solid var(--vien)}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;padding:12px 0;font-size:.86rem;color:var(--chu-mo)}
.breadcrumb a{color:var(--chu-mo)}
.breadcrumb a:hover{color:var(--xanh-chinh)}
.breadcrumb .sep{color:var(--xanh-vien)}
.breadcrumb .current{color:var(--chu-dam);font-weight:600;max-width:520px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ===== Article hero ===== */
.article-hero{background:linear-gradient(180deg,var(--xanh-nhat) 0%,var(--nen-page) 100%);padding:44px 0 26px}
.article-hero-inner{max-width:860px}
.article-cat{display:inline-flex;align-items:center;gap:8px;background:var(--nen-trang);border:1.5px solid var(--xanh-vien);color:var(--xanh-chinh);font-weight:700;font-size:.8rem;padding:6px 16px;border-radius:999px;margin-bottom:18px;letter-spacing:.03em}
.article-cat::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--xanh-chinh)}
.article-hero h1{font-size:2.15rem;line-height:1.3;color:var(--chu-dam);font-weight:800;margin-bottom:18px;letter-spacing:-.01em}
.article-meta{display:flex;flex-wrap:wrap;gap:10px 26px;font-size:.88rem;color:var(--chu-mo)}
.article-meta span{display:inline-flex;align-items:center;gap:7px}
.article-meta strong{color:var(--chu-thuong);font-weight:600}

/* ===== Summary strip ===== */
.summary-strip{margin:26px 0 0}
.summary-box{background:var(--nen-trang);border:1px solid var(--vien);border-left:5px solid var(--xanh-chinh);border-radius:var(--bo-goc);box-shadow:var(--bong-nhe);padding:26px 30px;display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.summary-item h3{font-size:.8rem;font-weight:700;color:var(--xanh-chinh);letter-spacing:.06em;margin-bottom:6px}
.summary-item p{font-size:.92rem;color:var(--chu-thuong);line-height:1.55}

/* ===== Layout ===== */
.article-wrap{padding:36px 0 70px}
.article-shell{max-width:860px;margin:0 auto}
.article-cover{border-radius:var(--bo-goc-lon);overflow:hidden;box-shadow:var(--bong-dam);margin-bottom:34px}
.article-cover img{width:100%;height:auto;object-fit:cover}

/* ===== Article body ===== */
.article-body{background:var(--nen-trang);border:1px solid var(--vien);border-radius:var(--bo-goc-lon);box-shadow:var(--bong-nhe);padding:44px 48px;color:var(--chu-thuong);font-size:1.02rem;line-height:1.75}
.article-body h2{font-size:1.5rem;color:var(--chu-dam);font-weight:800;margin:2em 0 .7em;padding-left:14px;border-left:4px solid var(--xanh-chinh);line-height:1.35}
.article-body h2:first-child{margin-top:0}
.article-body h3{font-size:1.2rem;color:var(--chu-dam);font-weight:700;margin:1.6em 0 .6em}
.article-body h4{font-size:1.05rem;color:var(--chu-dam);font-weight:700;margin:1.4em 0 .5em}
.article-body p{margin:0 0 1.1em}
.article-body a{text-decoration:underline;text-underline-offset:3px}
.article-body ul,.article-body ol{margin:0 0 1.2em;padding-left:1.5em}
.article-body ul{list-style:disc}
.article-body ol{list-style:decimal}
.article-body ul li,.article-body ol li{margin-bottom:.5em}
.article-body img{border-radius:var(--bo-goc);margin:1.4em auto;box-shadow:var(--bong-nhe)}
.article-body blockquote{border-left:4px solid var(--xanh-vien);background:var(--xanh-nhat);border-radius:0 var(--bo-goc) var(--bo-goc) 0;padding:18px 24px;margin:1.4em 0;color:var(--chu-dam);font-style:italic}
.article-body table{width:100%;border-collapse:collapse;margin:1.4em 0;font-size:.94rem}
.article-body table th{background:var(--xanh-nhat);color:var(--chu-dam);font-weight:700;text-align:left}
.article-body table th,.article-body table td{border:1px solid var(--vien);padding:10px 14px}
.article-body table tr:nth-child(even) td{background:#FAFCFF}
.article-body pre,.article-body code{background:#F0F5FC;border-radius:8px;font-size:.9em}
.article-body code{padding:2px 7px}
.article-body pre{padding:16px 20px;overflow-x:auto;margin:1.3em 0}
.article-body hr{border:0;border-top:1px solid var(--vien);margin:2em 0}

/* ===== Empty state ===== */
.article-empty{background:var(--nen-trang);border:1px dashed var(--xanh-vien);border-radius:var(--bo-goc-lon);padding:70px 30px;text-align:center;box-shadow:var(--bong-nhe)}
.article-empty .empty-ico{width:74px;height:74px;margin:0 auto 20px;border-radius:50%;background:var(--xanh-nhat);display:flex;align-items:center;justify-content:center;font-size:2rem}
.article-empty h2{color:var(--chu-dam);font-size:1.4rem;margin-bottom:10px}
.article-empty p{color:var(--chu-mo);margin-bottom:26px}
.btn-vehome{display:inline-block;background:linear-gradient(135deg,var(--xanh-chinh),var(--xanh-dam));color:#fff;font-weight:700;padding:13px 34px;border-radius:999px;box-shadow:0 6px 18px rgba(29,111,224,.35);transition:transform .2s,box-shadow .2s}
.btn-vehome:hover{color:#fff;transform:translateY(-2px);box-shadow:0 10px 26px rgba(29,111,224,.45)}

/* ===== Mid CTA ===== */
.cta-mid{margin:40px 0;background:linear-gradient(120deg,var(--xanh-dam),var(--xanh-chinh) 70%);border-radius:var(--bo-goc-lon);padding:38px 42px;display:flex;align-items:center;justify-content:space-between;gap:28px;box-shadow:var(--bong-dam);position:relative;overflow:hidden}
.cta-mid::before{content:"";position:absolute;right:-60px;top:-60px;width:220px;height:220px;border-radius:50%;background:rgba(255,255,255,.08)}
.cta-mid::after{content:"";position:absolute;right:40px;bottom:-80px;width:160px;height:160px;border-radius:50%;background:rgba(255,255,255,.06)}
.cta-mid-text h2{color:#fff;font-size:1.42rem;font-weight:800;margin-bottom:8px;line-height:1.35}
.cta-mid-text p{color:#D8E7FB;font-size:.96rem;max-width:520px}
.cta-mid .btn-cta{flex-shrink:0;background:#fff;color:var(--xanh-dam);font-weight:800;padding:14px 32px;border-radius:999px;box-shadow:0 6px 18px rgba(0,0,0,.18);transition:transform .2s;position:relative;z-index:1}
.cta-mid .btn-cta:hover{transform:translateY(-2px);color:var(--xanh-chinh)}

/* ===== Related topics ===== */
.related-section{margin-top:52px}
.section-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:22px}
.section-head h2{font-size:1.45rem;color:var(--chu-dam);font-weight:800}
.section-head p{color:var(--chu-mo);font-size:.9rem}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.related-card{background:var(--nen-trang);border:1px solid var(--vien);border-radius:var(--bo-goc-lon);overflow:hidden;box-shadow:var(--bong-nhe);transition:transform .25s,box-shadow .25s;display:flex;flex-direction:column}
.related-card:hover{transform:translateY(-5px);box-shadow:var(--bong-dam)}
.related-card .thumb{height:150px;overflow:hidden}
.related-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s}
.related-card:hover .thumb img{transform:scale(1.06)}
.related-card .body{padding:20px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1}
.related-card .body h3{font-size:1.05rem;color:var(--chu-dam);font-weight:700;line-height:1.4}
.related-card .body p{font-size:.9rem;color:var(--chu-mo);flex:1}
.related-card .body .link-more{font-weight:700;font-size:.9rem;color:var(--xanh-chinh);display:inline-flex;align-items:center;gap:6px}
.related-card .body .link-more::after{content:"→";transition:transform .2s}
.related-card:hover .body .link-more::after{transform:translateX(4px)}

/* ===== Tips box ===== */
.tips-section{margin-top:52px;background:var(--nen-trang);border:1px solid var(--vien);border-radius:var(--bo-goc-lon);box-shadow:var(--bong-nhe);padding:36px 40px}
.tips-section h2{font-size:1.35rem;color:var(--chu-dam);font-weight:800;margin-bottom:20px}
.tips-list{display:grid;grid-template-columns:1fr 1fr;gap:16px 32px}
.tips-list li{display:flex;gap:14px;align-items:flex-start}
.tips-list .tick{flex-shrink:0;width:26px;height:26px;border-radius:50%;background:var(--xanh-nhat);color:var(--xanh-chinh);font-weight:800;display:flex;align-items:center;justify-content:center;font-size:.85rem;margin-top:2px}
.tips-list p{font-size:.94rem}
.tips-list strong{color:var(--chu-dam)}

/* ===== FAB ===== */
.fab-hotro{position:fixed;left:16px;bottom:96px;z-index:50;width:58px;height:58px;border-radius:50%;
  background:linear-gradient(135deg,var(--xanh-chinh),var(--xanh-dam));display:flex;align-items:center;justify-content:center;
  color:#fff;font-size:1.5rem;box-shadow:0 8px 22px rgba(29,111,224,.4);opacity:.85;
  animation:fab-noi 3s ease-in-out infinite;transition:transform .2s,opacity .2s}
.fab-hotro:hover{transform:scale(1.1);opacity:1;color:#fff}
.fab-hotro:active{transform:scale(.95) translateY(1px)}
.fab-hotro .fab-dot{position:absolute;top:4px;right:4px;width:12px;height:12px;border-radius:50%;background:var(--cam-nhan);border:2px solid #fff;animation:fab-nhay 1.6s infinite}
@keyframes fab-noi{0%,100%{transform:translateY(0)}50%{transform:translateY(-6px)}}
@keyframes fab-nhay{0%,100%{opacity:1}50%{opacity:.3}}

/* ===== Footer ===== */
.site-footer{background:#0F2A50;color:#B9CBE6;margin-top:40px}
.site-footer .footer-main{display:grid;grid-template-columns:2fr 1fr 1fr 1.3fr;gap:36px;padding:52px 0 40px}
.site-footer .logo-text{color:#fff}
.site-footer .logo-text small{color:#8FB4E8}
.footer-brand p{margin-top:16px;font-size:.9rem;line-height:1.7;color:#9FB6D8}
.footer-col h4{color:#fff;font-size:1rem;font-weight:700;margin-bottom:16px}
.footer-col ul li{margin-bottom:10px}
.footer-col ul li a{color:#B9CBE6;font-size:.92rem}
.footer-col ul li a:hover{color:#fff}
.footer-col p{font-size:.9rem;line-height:1.7;color:#9FB6D8}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:20px 0;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;font-size:.83rem;color:#7E97BF}

/* ===== Responsive ===== */
@media (max-width:1024px){
  .summary-box{grid-template-columns:1fr 1fr}
  .related-grid{grid-template-columns:1fr 1fr}
  .site-footer .footer-main{grid-template-columns:1fr 1fr}
  .nav-hot{display:none}
  .article-body{padding:36px 32px}
}
@media (max-width:768px){
  .header-top{flex-wrap:wrap;gap:14px}
  .header-search{order:3;max-width:100%;flex-basis:100%}
  .article-hero h1{font-size:1.6rem}
  .cta-mid{flex-direction:column;align-items:flex-start;padding:30px 28px}
  .tips-list{grid-template-columns:1fr}
  .tips-section{padding:28px 24px}
}
@media (max-width:520px){
  .summary-box{grid-template-columns:1fr;padding:22px 20px}
  .related-grid{grid-template-columns:1fr}
  .site-footer .footer-main{grid-template-columns:1fr;gap:28px}
  .article-body{padding:26px 18px;font-size:.98rem}
  .article-hero h1{font-size:1.38rem}
  .btn-dangky{padding:9px 16px;font-size:.88rem}
  .btn-dangnhap{font-size:.88rem}
  .breadcrumb .current{max-width:180px}
  .footer-bottom{flex-direction:column}
}

/* roulang page: category1 */
:root{
  --xanh-dam:#0b3d91;
  --xanh-chinh:#1a6ee0;
  --xanh-nhat:#e8f1fc;
  --xanh-vien:#c9ddf5;
  --nen:#f5f8fd;
  --trang:#ffffff;
  --chu:#1c2b3a;
  --chu-nhat:#5b6b7d;
  --do-live:#e5484d;
  --vang-nhan:#f5a623;
  --bo-goc:14px;
  --bo-goc-lon:22px;
  --bong:0 8px 24px rgba(13,52,110,.08);
  --bong-dam:0 16px 40px rgba(13,52,110,.14);
  --khoang:clamp(56px,8vw,96px);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"Segoe UI","Helvetica Neue",Arial,"Noto Sans",sans-serif;
  background:var(--nen);color:var(--chu);line-height:1.65;font-size:16px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--xanh-chinh);text-decoration:none;transition:color .2s}
a:hover{color:var(--xanh-dam)}
button{font-family:inherit;cursor:pointer;border:none;background:none}
ul{list-style:none}
.container{width:min(1180px,92%);margin:0 auto}

/* ===== Header ===== */
.site-header{position:sticky;top:0;z-index:100;background:var(--trang);box-shadow:0 2px 14px rgba(13,52,110,.09)}
.header-top{display:flex;align-items:center;gap:24px;padding:14px 0}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-mark{width:40px;height:40px;border-radius:50%;flex-shrink:0;
  background:conic-gradient(var(--xanh-chinh) 0 25%,var(--vang-nhan) 25% 50%,var(--xanh-dam) 50% 75%,#6fb1ff 75% 100%);
  border:3px solid var(--trang);box-shadow:0 0 0 2px var(--xanh-vien);position:relative}
.logo-mark::after{content:"";position:absolute;inset:30%;background:var(--trang);border-radius:50%}
.logo-text{font-weight:800;font-size:1.12rem;color:var(--xanh-dam);line-height:1.2;display:flex;flex-direction:column}
.logo-text small{font-weight:600;font-size:.68rem;color:var(--chu-nhat);letter-spacing:.02em}
.header-search{flex:1;display:flex;max-width:420px;background:var(--xanh-nhat);border:1px solid var(--xanh-vien);border-radius:999px;overflow:hidden;transition:box-shadow .2s}
.header-search:focus-within{box-shadow:0 0 0 3px rgba(26,110,224,.18)}
.header-search input{flex:1;border:none;background:transparent;padding:10px 18px;font-size:.92rem;color:var(--chu);outline:none}
.header-search button{padding:0 16px;font-size:1rem;color:var(--xanh-chinh)}
.header-auth{display:flex;align-items:center;gap:14px;margin-left:auto;flex-shrink:0}
.btn-dangnhap{font-weight:600;font-size:.95rem;color:var(--xanh-dam)}
.btn-dangky{background:var(--xanh-chinh);color:#fff;font-weight:700;font-size:.95rem;padding:10px 22px;border-radius:999px;box-shadow:0 6px 16px rgba(26,110,224,.32);transition:transform .2s,box-shadow .2s}
.btn-dangky:hover{color:#fff;transform:translateY(-2px);box-shadow:0 10px 22px rgba(26,110,224,.4)}
.main-nav{border-top:1px solid #eef2f8;background:var(--trang)}
.main-nav ul{display:flex;gap:4px}
.main-nav ul a{display:block;padding:12px 18px;font-weight:600;font-size:.95rem;color:var(--chu-nhat);border-bottom:3px solid transparent;transition:color .2s,border-color .2s}
.main-nav ul a:hover{color:var(--xanh-chinh)}
.main-nav ul a.active{color:var(--xanh-dam);border-bottom-color:var(--xanh-chinh)}
.nav-hot{margin-left:auto;font-size:.82rem;color:var(--chu-nhat);white-space:nowrap;display:flex;align-items:center;gap:8px}
.tag-hot{background:var(--do-live);color:#fff;font-weight:800;font-size:.68rem;padding:2px 8px;border-radius:999px;letter-spacing:.05em}

/* ===== Hero banner ===== */
.cat-hero{position:relative;color:#fff;overflow:hidden}
.cat-hero::before{content:"";position:absolute;inset:0;background:url("/assets/images/backpic/back-2.jpg") center/cover no-repeat}
.cat-hero::after{content:"";position:absolute;inset:0;background:linear-gradient(105deg,rgba(8,38,84,.93) 0%,rgba(11,61,145,.82) 45%,rgba(26,110,224,.55) 100%)}
.cat-hero .container{position:relative;z-index:2;padding:calc(var(--khoang)*.9) 0;max-width:820px;text-align:center}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.3);backdrop-filter:blur(4px);padding:7px 18px;border-radius:999px;font-size:.85rem;font-weight:600;margin-bottom:22px}
.cat-hero h1{font-size:clamp(1.9rem,4.2vw,2.9rem);font-weight:800;line-height:1.22;margin-bottom:18px}
.cat-hero h1 em{font-style:normal;color:#ffd166}
.cat-hero p{font-size:1.08rem;color:#dbe8fb;max-width:640px;margin:0 auto 30px}
.hero-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.btn-chinh{display:inline-block;background:var(--vang-nhan);color:#3a2600;font-weight:800;font-size:1rem;padding:14px 32px;border-radius:999px;box-shadow:0 10px 26px rgba(245,166,35,.42);transition:transform .2s,box-shadow .2s}
.btn-chinh:hover{color:#3a2600;transform:translateY(-3px);box-shadow:0 14px 32px rgba(245,166,35,.55)}
.btn-phu{display:inline-block;background:rgba(255,255,255,.12);border:1.5px solid rgba(255,255,255,.55);color:#fff;font-weight:700;font-size:1rem;padding:13px 30px;border-radius:999px;transition:background .2s}
.btn-phu:hover{color:#fff;background:rgba(255,255,255,.24)}

/* ===== Section base ===== */
.section{padding:var(--khoang) 0}
.section-alt{background:var(--trang)}
.section-head{max-width:640px;margin-bottom:44px}
.section-kicker{display:inline-block;font-size:.78rem;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:var(--xanh-chinh);background:var(--xanh-nhat);padding:5px 14px;border-radius:999px;margin-bottom:14px}
.section-head h2{font-size:clamp(1.5rem,3vw,2.1rem);font-weight:800;color:var(--xanh-dam);line-height:1.3;margin-bottom:12px}
.section-head p{color:var(--chu-nhat);font-size:1.02rem}

/* ===== Live demo block ===== */
.live-wrap{display:grid;grid-template-columns:1.15fr .85fr;gap:44px;align-items:center}
.live-cover{position:relative;border-radius:var(--bo-goc-lon);overflow:hidden;box-shadow:var(--bong-dam)}
.live-cover img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/10}
.live-cover::after{content:"";position:absolute;inset:0;background:linear-gradient(to top,rgba(9,30,66,.65),transparent 55%)}
.live-badge{position:absolute;top:18px;left:18px;z-index:2;display:inline-flex;align-items:center;gap:8px;background:var(--do-live);color:#fff;font-weight:800;font-size:.8rem;letter-spacing:.08em;padding:7px 16px;border-radius:999px;box-shadow:0 4px 14px rgba(229,72,77,.45)}
.live-badge::before{content:"";width:8px;height:8px;border-radius:50%;background:#fff;animation:nhay 1.1s infinite}
@keyframes nhay{0%,100%{opacity:1}50%{opacity:.25}}
.live-caption{position:absolute;left:22px;right:22px;bottom:20px;z-index:2;color:#fff;font-weight:700;font-size:1.05rem;line-height:1.4}
.countdown-label{font-size:.88rem;font-weight:700;color:var(--chu-nhat);text-transform:uppercase;letter-spacing:.1em;margin-bottom:14px}
.countdown{display:flex;gap:12px;margin-bottom:30px}
.countdown div{background:var(--trang);border:1px solid var(--xanh-vien);border-radius:var(--bo-goc);box-shadow:var(--bong);min-width:78px;padding:14px 10px;text-align:center}
.countdown b{display:block;font-size:1.7rem;font-weight:800;color:var(--xanh-dam);font-variant-numeric:tabular-nums}
.countdown span{font-size:.72rem;font-weight:600;color:var(--chu-nhat);text-transform:uppercase;letter-spacing:.06em}
.live-points{margin-bottom:30px}
.live-points li{display:flex;gap:14px;padding:11px 0;border-bottom:1px dashed var(--xanh-vien);color:var(--chu);font-size:.98rem}
.live-points li:last-child{border-bottom:none}
.live-points .dot{flex-shrink:0;width:26px;height:26px;border-radius:50%;background:var(--xanh-nhat);color:var(--xanh-chinh);font-weight:800;font-size:.8rem;display:flex;align-items:center;justify-content:center;margin-top:2px}

/* ===== Top 5 ranking rows ===== */
.rank-list{display:flex;flex-direction:column;gap:18px}
.rank-item{display:grid;grid-template-columns:64px 1fr auto;gap:22px;align-items:center;background:var(--trang);border:1px solid var(--xanh-vien);border-radius:var(--bo-goc);padding:22px 26px;box-shadow:var(--bong);transition:transform .2s,box-shadow .2s}
.rank-item:hover{transform:translateY(-3px);box-shadow:var(--bong-dam)}
.rank-num{width:64px;height:64px;border-radius:var(--bo-goc);background:var(--xanh-nhat);color:var(--xanh-dam);font-size:1.5rem;font-weight:800;display:flex;align-items:center;justify-content:center}
.rank-item.top1 .rank-num{background:linear-gradient(135deg,#ffd166,#f5a623);color:#3a2600}
.rank-body h3{font-size:1.12rem;font-weight:800;color:var(--xanh-dam);margin-bottom:5px}
.rank-body p{color:var(--chu-nhat);font-size:.94rem;max-width:640px}
.rank-tags{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}
.rank-tags span{font-size:.74rem;font-weight:700;color:var(--xanh-chinh);background:var(--xanh-nhat);padding:3px 10px;border-radius:999px}
.rank-score{text-align:right}
.rank-score b{display:block;font-size:1.6rem;font-weight:800;color:var(--xanh-chinh)}
.rank-score span{font-size:.78rem;color:var(--chu-nhat)}

/* ===== Steps ===== */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;counter-reset:buoc}
.step{position:relative;background:var(--trang);border-radius:var(--bo-goc);padding:28px 24px 24px;box-shadow:var(--bong);border-top:4px solid var(--xanh-chinh)}
.step::before{counter-increment:buoc;content:"0" counter(buoc);font-size:2rem;font-weight:800;color:var(--xanh-vien);display:block;margin-bottom:10px;line-height:1}
.step h3{font-size:1.02rem;font-weight:800;color:var(--xanh-dam);margin-bottom:8px}
.step p{font-size:.92rem;color:var(--chu-nhat)}

/* ===== Use cases ===== */
.usecase-wrap{display:grid;grid-template-columns:.9fr 1.1fr;gap:44px;align-items:center}
.usecase-img{border-radius:var(--bo-goc-lon);overflow:hidden;box-shadow:var(--bong-dam)}
.usecase-img img{aspect-ratio:4/3;width:100%;object-fit:cover}
.usecase-list li{padding:18px 0;border-bottom:1px solid #e6edf7}
.usecase-list li:last-child{border-bottom:none}
.usecase-list h3{font-size:1.05rem;font-weight:800;color:var(--xanh-dam);margin-bottom:5px}
.usecase-list p{color:var(--chu-nhat);font-size:.95rem}

/* ===== Subscribe band ===== */
.sub-band{background:linear-gradient(120deg,var(--xanh-dam),var(--xanh-chinh));border-radius:var(--bo-goc-lon);color:#fff;padding:clamp(36px,5vw,60px);display:flex;align-items:center;justify-content:space-between;gap:34px;box-shadow:var(--bong-dam)}
.sub-band h2{font-size:clamp(1.3rem,2.6vw,1.8rem);font-weight:800;margin-bottom:10px}
.sub-band p{color:#d5e5fb;max-width:520px;font-size:.98rem}
.sub-form{display:flex;gap:10px;flex-shrink:0}
.sub-form input{border:none;border-radius:999px;padding:14px 22px;font-size:.95rem;min-width:250px;outline:none}
.sub-form button{background:var(--vang-nhan);color:#3a2600;font-weight:800;font-size:.95rem;padding:14px 26px;border-radius:999px;box-shadow:0 8px 20px rgba(0,0,0,.2);transition:transform .2s}
.sub-form button:hover{transform:translateY(-2px)}

/* ===== Replay cards ===== */
.replay-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.replay-card{background:var(--trang);border-radius:var(--bo-goc);overflow:hidden;box-shadow:var(--bong);transition:transform .2s,box-shadow .2s;display:flex;flex-direction:column}
.replay-card:hover{transform:translateY(-4px);box-shadow:var(--bong-dam)}
.replay-thumb{position:relative}
.replay-thumb img{aspect-ratio:16/9;width:100%;object-fit:cover}
.replay-time{position:absolute;right:12px;bottom:12px;background:rgba(9,30,66,.85);color:#fff;font-size:.74rem;font-weight:700;padding:3px 10px;border-radius:6px}
.replay-body{padding:20px 22px 24px;display:flex;flex-direction:column;flex:1}
.replay-body h3{font-size:1.02rem;font-weight:800;color:var(--xanh-dam);line-height:1.4;margin-bottom:8px}
.replay-body p{color:var(--chu-nhat);font-size:.9rem;margin-bottom:16px;flex:1}
.replay-link{font-weight:700;font-size:.9rem;color:var(--xanh-chinh)}
.replay-link:hover{text-decoration:underline}

/* ===== FAQ ===== */
.faq-wrap{max-width:820px}
.faq-item{background:var(--trang);border:1px solid var(--xanh-vien);border-radius:var(--bo-goc);margin-bottom:14px;overflow:hidden}
.faq-item summary{list-style:none;cursor:pointer;padding:20px 24px;font-weight:700;color:var(--xanh-dam);font-size:1rem;display:flex;justify-content:space-between;align-items:center;gap:16px;transition:background .2s}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:1.4rem;font-weight:600;color:var(--xanh-chinh);flex-shrink:0;transition:transform .25s}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item summary:hover{background:var(--xanh-nhat)}
.faq-item div{padding:0 24px 22px;color:var(--chu-nhat);font-size:.96rem}

/* ===== Final CTA ===== */
.final-cta{text-align:center;background:var(--trang)}
.final-cta h2{font-size:clamp(1.5rem,3vw,2.1rem);font-weight:800;color:var(--xanh-dam);margin-bottom:14px}
.final-cta p{color:var(--chu-nhat);max-width:560px;margin:0 auto 30px}
.pay-badges{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:28px}
.pay-badges span{background:var(--xanh-nhat);border:1px solid var(--xanh-vien);color:var(--xanh-dam);font-weight:700;font-size:.82rem;padding:7px 18px;border-radius:999px}

/* ===== Footer ===== */
.site-footer{background:#0d2b57;color:#c3d4ec;padding:60px 0 0;margin-top:var(--khoang)}
.footer-main{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:44px}
.site-footer .logo-text{color:#fff}
.site-footer .logo-text small{color:#8fa9cd}
.footer-brand p{margin-top:16px;font-size:.92rem;line-height:1.7;color:#a9bfdd}
.footer-col h4{color:#fff;font-size:1rem;font-weight:800;margin-bottom:16px}
.footer-col ul li{margin-bottom:10px}
.footer-col a{color:#c3d4ec;font-size:.92rem}
.footer-col a:hover{color:#ffd166}
.footer-col p{font-size:.92rem;line-height:1.7;color:#a9bfdd}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:20px 0;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;font-size:.84rem;color:#8fa9cd}

/* ===== FAB ===== */
.fab-hotro{position:fixed;left:16px;bottom:96px;z-index:50;display:flex;align-items:center;gap:10px;background:var(--trang);border:2px solid var(--xanh-chinh);border-radius:999px;padding:12px 20px;min-height:48px;font-weight:800;font-size:.9rem;color:var(--xanh-dam);box-shadow:0 8px 24px rgba(26,110,224,.3);opacity:.85;animation:troi 3s ease-in-out infinite;transition:transform .2s,opacity .2s}
.fab-hotro:hover{opacity:1;transform:scale(1.08);color:var(--xanh-dam)}
.fab-hotro:active{transform:scale(.95) translateY(1px)}
.fab-hotro .fab-icon{font-size:1.2rem}
.fab-hotro::after{content:"";position:absolute;top:4px;right:6px;width:9px;height:9px;border-radius:50%;background:var(--do-live);animation:nhay 1.4s infinite}
@keyframes troi{0%,100%{transform:translateY(0)}50%{transform:translateY(-6px)}}

/* ===== Responsive ===== */
@media (max-width:1024px){
  .nav-hot{display:none}
  .live-wrap,.usecase-wrap{grid-template-columns:1fr;gap:34px}
  .steps{grid-template-columns:repeat(2,1fr)}
  .replay-grid{grid-template-columns:repeat(2,1fr)}
  .footer-main{grid-template-columns:1fr 1fr}
  .sub-band{flex-direction:column;align-items:flex-start}
}
@media (max-width:768px){
  .header-search{display:none}
  .header-top{gap:12px}
  .main-nav ul{overflow-x:auto;-webkit-overflow-scrolling:touch}
  .main-nav ul a{white-space:nowrap;padding:12px 14px}
  .rank-item{grid-template-columns:52px 1fr;padding:18px 20px}
  .rank-num{width:52px;height:52px;font-size:1.2rem}
  .rank-score{grid-column:2;text-align:left;display:flex;align-items:baseline;gap:8px}
  .sub-form{width:100%;flex-direction:column}
  .sub-form input{min-width:0;width:100%}
}
@media (max-width:520px){
  .logo-text{font-size:.98rem}
  .logo-text small{display:none}
  .btn-dangnhap{font-size:.86rem}
  .btn-dangky{padding:8px 14px;font-size:.85rem}
  .steps,.replay-grid{grid-template-columns:1fr}
  .footer-main{grid-template-columns:1fr}
  .countdown div{min-width:0;flex:1}
  .hero-actions{flex-direction:column;align-items:center}
  .btn-chinh,.btn-phu{width:100%;max-width:320px;text-align:center}
}

/* roulang page: category2 */
\n:root{\n  --xanh-chinh:#1358d6;\n  --xanh-dam:#0c3a8f;\n  --xanh-nhat:#e8f0fe;\n  --xanh-vien:#c7d9f7;\n  --nen:#f5f8fd;\n  --trang:#ffffff;\n  --chu:#1b2a41;\n  --chu-nhe:#5a6b85;\n  --cam-nhan:#ff8a00;\n  --do-hot:#e0304a;\n  --bo-goc:14px;\n  --bo-goc-lon:22px;\n  --bong:0 10px 30px rgba(19,88,214,.10);\n  --bong-sau:0 18px 45px rgba(12,58,143,.16);\n  --khoang:clamp(56px,8vw,110px);\n}\n*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}\nhtml{scroll-behavior:smooth}\nbody{\n  font-family:\"Be Vietnam Pro\",\"Segoe UI\",Roboto,Arial,sans-serif;\n  background:var(--nen);\n  color:var(--chu);\n  line-height:1.65;\n  font-size:16px;\n}\nimg{max-width:100%;display:block}\na{color:var(--xanh-chinh);text-decoration:none;transition:color .2s ease}\na:hover{color:var(--xanh-dam)}\nbutton,input{font-family:inherit;font-size:inherit}\nul{list-style:none}\n.container{width:min(1160px,92%);margin:0 auto}\n\n/* ===== Header ===== */\n.site-header{position:sticky;top:0;z-index:100;background:var(--trang);box-shadow:0 2px 14px rgba(12,58,143,.08)}\n.header-top{display:flex;align-items:center;gap:24px;padding:14px 0}\n.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}\n.logo-mark{width:38px;height:38px;border-radius:50%;flex-shrink:0;\n  background:conic-gradient(var(--xanh-chinh) 0 25%,var(--cam-nhan) 25% 50%,var(--xanh-dam) 50% 75%,#3fa4ff 75% 100%);\n  position:relative;box-shadow:0 3px 10px rgba(19,88,214,.35)}\n.logo-mark::after{content:\"\";position:absolute;inset:11px;background:var(--trang);border-radius:50%}\n.logo-text{font-weight:800;font-size:1.1rem;color:var(--chu);line-height:1.2;display:flex;flex-direction:column}\n.logo-text small{font-weight:600;font-size:.68rem;color:var(--xanh-chinh);letter-spacing:.02em}\n.header-search{flex:1;display:flex;max-width:420px;border:1.5px solid var(--xanh-vien);border-radius:999px;overflow:hidden;background:var(--nen)}\n.header-search input{flex:1;border:none;background:transparent;padding:9px 18px;color:var(--chu);outline:none}\n.header-search input:focus{background:var(--trang)}\n.header-search button{border:none;background:var(--xanh-chinh);color:#fff;padding:0 18px;cursor:pointer;transition:background .2s}\n.header-search button:hover{background:var(--xanh-dam)}\n.header-auth{margin-left:auto;display:flex;align-items:center;gap:12px;flex-shrink:0}\n.btn-dangnhap{font-weight:600;color:var(--chu);padding:8px 6px}\n.btn-dangnhap:hover{color:var(--xanh-chinh)}\n.btn-dangky{background:var(--xanh-chinh);color:#fff;font-weight:700;padding:10px 20px;border-radius:999px;box-shadow:0 6px 16px rgba(19,88,214,.3);transition:transform .2s,box-shadow .2s,background .2s}\n.btn-dangky:hover{background:var(--xanh-dam);color:#fff;transform:translateY(-1px);box-shadow:0 8px 20px rgba(19,88,214,.4)}\n.main-nav{border-top:1px solid #eef2fa;background:var(--trang)}\n.main-nav ul{display:flex;gap:4px}\n.main-nav ul a{display:block;padding:12px 16px;font-weight:600;color:var(--chu-nhe);border-bottom:3px solid transparent;transition:color .2s,border-color .2s}\n.main-nav ul a:hover{color:var(--xanh-chinh)}\n.main-nav ul a.active{color:var(--xanh-chinh);border-bottom-color:var(--xanh-chinh)}\n.nav-hot{margin-left:auto;font-size:.82rem;color:var(--chu-nhe);display:flex;align-items:center;gap:8px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}\n.tag-hot{background:var(--do-hot);color:#fff;font-size:.66rem;font-weight:800;padding:2px 8px;border-radius:999px;letter-spacing:.05em;animation:nhay 1.6s ease-in-out infinite}\n@keyframes nhay{0%,100%{opacity:1}50%{opacity:.55}}\n\n/* ===== Breadcrumb ===== */\n.breadcrumb{padding:18px 0 0;font-size:.85rem;color:var(--chu-nhe)}\n.breadcrumb a{color:var(--chu-nhe)}\n.breadcrumb a:hover{color:var(--xanh-chinh)}\n.breadcrumb span{color:var(--chu);font-weight:600}\n\n/* ===== Hero ===== */\n.hero{padding:calc(var(--khoang)*.55) 0 var(--khoang);position:relative;overflow:hidden}\n.hero::before{content:\"\";position:absolute;top:-220px;right:-180px;width:560px;height:560px;border-radius:50%;\n  background:radial-gradient(circle,rgba(19,88,214,.12),transparent 70%)}\n.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;position:relative}\n.hero-eyebrow{display:inline-flex;align-items:center;gap:8px;background:var(--xanh-nhat);color:var(--xanh-chinh);font-weight:700;font-size:.8rem;padding:7px 16px;border-radius:999px;margin-bottom:20px}\n.hero h1{font-size:clamp(1.8rem,3.6vw,2.7rem);line-height:1.22;font-weight:800;letter-spacing:-.01em;margin-bottom:18px}\n.hero h1 em{font-style:normal;color:var(--xanh-chinh)}\n.hero-desc{color:var(--chu-nhe);font-size:1.05rem;max-width:520px;margin-bottom:24px}\n.hero-ticks{display:flex;flex-direction:column;gap:10px;margin-bottom:30px}\n.hero-ticks li{display:flex;gap:10px;align-items:flex-start;color:var(--chu)}\n.hero-ticks li::before{content:\"✓\";flex-shrink:0;width:22px;height:22px;border-radius:50%;background:var(--xanh-chinh);color:#fff;font-size:.75rem;font-weight:800;display:flex;align-items:center;justify-content:center;margin-top:2px}\n.hero-cta{display:flex;gap:14px;flex-wrap:wrap}\n.btn-chinh{display:inline-flex;align-items:center;gap:8px;background:var(--xanh-chinh);color:#fff;font-weight:700;padding:14px 28px;border-radius:999px;box-shadow:0 10px 24px rgba(19,88,214,.32);transition:transform .2s,box-shadow .2s,background .2s}\n.btn-chinh:hover{background:var(--xanh-dam);color:#fff;transform:translateY(-2px);box-shadow:0 14px 30px rgba(19,88,214,.42)}\n.btn-chinh:active{transform:translateY(0) scale(.98)}\n.btn-phu{display:inline-flex;align-items:center;gap:8px;background:var(--trang);color:var(--xanh-chinh);font-weight:700;padding:14px 26px;border-radius:999px;border:1.5px solid var(--xanh-vien);transition:border-color .2s,background .2s,transform .2s}\n.btn-phu:hover{border-color:var(--xanh-chinh);background:var(--xanh-nhat);transform:translateY(-2px)}\n\n/* Hero comparison panel */\n.chon-lo-trinh{background:var(--trang);border-radius:var(--bo-goc-lon);box-shadow:var(--bong-sau);padding:28px;position:relative}\n.chon-lo-trinh > p{font-weight:700;font-size:.92rem;color:var(--chu-nhe);margin-bottom:16px;text-transform:uppercase;letter-spacing:.06em}\n.lo-trinh{display:flex;flex-direction:column;gap:12px}\n.lo-trinh-item{display:flex;align-items:center;gap:16px;border:1.5px solid #e6edf9;border-radius:var(--bo-goc);padding:16px 18px;transition:border-color .2s,box-shadow .2s;background:var(--trang)}\n.lo-trinh-item:hover{border-color:var(--xanh-vien);box-shadow:var(--bong)}\n.lo-trinh-item .icon{width:44px;height:44px;flex-shrink:0;border-radius:12px;background:var(--xanh-nhat);display:flex;align-items:center;justify-content:center;font-size:1.3rem}\n.lo-trinh-item h3{font-size:1rem;font-weight:700}\n.lo-trinh-item p{font-size:.84rem;color:var(--chu-nhe);margin-top:2px}\n.lo-trinh-item .thoi-luong{margin-left:auto;flex-shrink:0;font-size:.78rem;font-weight:700;color:var(--xanh-chinh);background:var(--xanh-nhat);padding:5px 12px;border-radius:999px;white-space:nowrap}\n.lo-trinh-item.noi-bat{border:2px solid var(--xanh-chinh);background:linear-gradient(135deg,#f2f7ff,#ffffff);box-shadow:var(--bong-sau);position:relative}\n.lo-trinh-item.noi-bat::before{content:\"NÊN HỌC TRƯỚC\";position:absolute;top:-11px;left:18px;background:var(--cam-nhan);color:#fff;font-size:.62rem;font-weight:800;letter-spacing:.08em;padding:3px 12px;border-radius:999px}\n.chon-lo-trinh .btn-chinh{width:100%;justify-content:center;margin-top:18px}\n\n/* ===== Section chung ===== */\n.section{padding:var(--khoang) 0}\n.section-alt{background:var(--trang)}\n.sec-head{max-width:640px;margin-bottom:46px}\n.sec-head .nhan{color:var(--xanh-chinh);font-weight:800;font-size:.8rem;text-transform:uppercase;letter-spacing:.12em;display:block;margin-bottom:10px}\n.sec-head h2{font-size:clamp(1.5rem,2.8vw,2.1rem);font-weight:800;line-height:1.25;margin-bottom:12px}\n.sec-head p{color:var(--chu-nhe)}\n\n/* ===== Live section ===== */\n.live-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:stretch}\n.live-cover{position:relative;border-radius:var(--bo-goc-lon);overflow:hidden;box-shadow:var(--bong-sau);min-height:360px}\n.live-cover img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0}\n.live-cover .phu{position:absolute;inset:0;background:linear-gradient(180deg,rgba(11,30,64,.05) 30%,rgba(11,30,64,.88));display:flex;flex-direction:column;justify-content:flex-end;padding:28px;color:#fff}\n.live-badge{position:absolute;top:20px;left:20px;background:var(--do-hot);color:#fff;font-weight:800;font-size:.75rem;padding:6px 14px;border-radius:999px;display:flex;align-items:center;gap:7px;letter-spacing:.06em;box-shadow:0 4px 14px rgba(224,48,74,.5)}\n.live-badge::before{content:\"\";width:8px;height:8px;border-radius:50%;background:#fff;animation:nhay 1.2s infinite}\n.live-cover h3{font-size:1.3rem;font-weight:800;margin-bottom:6px}\n.live-cover .phu p{font-size:.9rem;opacity:.85;margin-bottom:16px}\n.dem-nguoc{display:flex;gap:10px}\n.dem-nguoc div{background:rgba(255,255,255,.14);backdrop-filter:blur(6px);border:1px solid rgba(255,255,255,.25);border-radius:12px;padding:10px 0;width:74px;text-align:center}\n.dem-nguoc strong{display:block;font-size:1.45rem;font-weight:800;line-height:1.1}\n.dem-nguoc span{font-size:.68rem;text-transform:uppercase;letter-spacing:.08em;opacity:.8}\n.live-diem{display:flex;flex-direction:column}\n.live-diem h3{font-size:1.15rem;font-weight:800;margin-bottom:18px}\n.diem-list{display:flex;flex-direction:column;gap:0;margin-bottom:26px}\n.diem-list li{display:flex;gap:16px;padding:14px 0;border-bottom:1px dashed #dde7f7}\n.diem-list li:last-child{border-bottom:none}\n.diem-list .stt{flex-shrink:0;width:32px;height:32px;border-radius:10px;background:var(--xanh-nhat);color:var(--xanh-chinh);font-weight:800;font-size:.85rem;display:flex;align-items:center;justify-content:center}\n.diem-list strong{display:block;font-size:.95rem}\n.diem-list p{font-size:.85rem;color:var(--chu-nhe)}\n.form-nhac{background:var(--xanh-nhat);border-radius:var(--bo-goc);padding:20px;margin-top:auto}\n.form-nhac p{font-size:.88rem;color:var(--chu);font-weight:600;margin-bottom:12px}\n.form-nhac form{display:flex;gap:10px}\n.form-nhac input{flex:1;border:1.5px solid var(--xanh-vien);border-radius:999px;padding:11px 18px;outline:none;background:var(--trang);color:var(--chu)}\n.form-nhac input:focus{border-color:var(--xanh-chinh)}\n.form-nhac button{border:none;cursor:pointer}\n\n/* ===== Steps ===== */\n.buoc-wrap{display:grid;grid-template-columns:repeat(5,1fr);gap:22px;counter-reset:buoc}\n.buoc{background:var(--trang);border-radius:var(--bo-goc);box-shadow:var(--bong);padding:26px 22px;position:relative;transition:transform .25s,box-shadow .25s}\n.buoc:hover{transform:translateY(-5px);box-shadow:var(--bong-sau)}\n.buoc::before{counter-increment:buoc;content:\"0\" counter(buoc);font-size:2rem;font-weight:800;color:var(--xanh-vien);display:block;margin-bottom:12px;line-height:1}\n.buoc h3{font-size:.98rem;font-weight:800;margin-bottom:8px}\n.buoc p{font-size:.84rem;color:var(--chu-nhe)}\n\n/* ===== Use cases ===== */\n.canh-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:40px 56px}\n.canh-item{display:flex;gap:20px;align-items:flex-start}\n.canh-item .icon{flex-shrink:0;width:54px;height:54px;border-radius:16px;background:var(--xanh-nhat);display:flex;align-items:center;justify-content:center;font-size:1.5rem}\n.canh-item h3{font-size:1.05rem;font-weight:800;margin-bottom:6px}\n.canh-item p{font-size:.9rem;color:var(--chu-nhe)}\n\n/* ===== Replay cards ===== */\n.xemlai-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}\n.xemlai-card{background:var(--trang);border-radius:var(--bo-goc);overflow:hidden;box-shadow:var(--bong);display:flex;flex-direction:column;transition:transform .25s,box-shadow .25s}\n.xemlai-card:hover{transform:translateY(-6px);box-shadow:var(--bong-sau)}\n.xemlai-card .thumb{position:relative;aspect-ratio:16/9;overflow:hidden}\n.xemlai-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s}\n.xemlai-card:hover .thumb img{transform:scale(1.05)}\n.xemlai-card .thumb .play{position:absolute;inset:0;display:flex;align-items:center;justify-content:center}\n.xemlai-card .thumb .play span{width:52px;height:52px;border-radius:50%;background:rgba(255,255,255,.92);color:var(--xanh-chinh);font-size:1.1rem;display:flex;align-items:center;justify-content:center;box-shadow:0 6px 20px rgba(0,0,0,.25);transition:transform .25s}\n.xemlai-card:hover .thumb .play span{transform:scale(1.12)}\n.xemlai-card .thumb .tg{position:absolute;bottom:10px;right:10px;background:rgba(11,30,64,.85);color:#fff;font-size:.72rem;font-weight:700;padding:3px 9px;border-radius:6px}\n.xemlai-body{padding:20px 22px 24px;display:flex;flex-direction:column;gap:8px;flex:1}\n.xemlai-body .loai{font-size:.72rem;font-weight:800;color:var(--xanh-chinh);text-transform:uppercase;letter-spacing:.08em}\n.xemlai-body h3{font-size:1rem;font-weight:800;line-height:1.4}\n.xemlai-body h3 a{color:var(--chu)}\n.xemlai-body h3 a:hover{color:var(--xanh-chinh)}\n.xemlai-body p{font-size:.85rem;color:var(--chu-nhe);flex:1}\n.xemlai-body .meta{font-size:.78rem;color:var(--chu-nhe);display:flex;gap:14px;padding-top:10px;border-top:1px solid #eef2fa}\n\n/* ===== FAQ ===== */\n.faq-wrap{max-width:780px}\n.faq-item{background:var(--trang);border:1.5px solid #e6edf9;border-radius:var(--bo-goc);margin-bottom:14px;overflow:hidden;transition:border-color .2s,box-shadow .2s}\n.faq-item[open]{border-color:var(--xanh-vien);box-shadow:var(--bong)}\n.faq-item summary{cursor:pointer;list-style:none;padding:18px 22px;font-weight:700;display:flex;justify-content:space-between;align-items:center;gap:16px}\n.faq-item summary::-webkit-details-marker{display:none}\n.faq-item summary::after{content:\"+\";flex-shrink:0;width:28px;height:28px;border-radius:50%;background:var(--xanh-nhat);color:var(--xanh-chinh);font-weight:800;display:flex;align-items:center;justify-content:center;transition:transform .25s,background .25s}\n.faq-item[open] summary::after{content:\"−\";background:var(--xanh-chinh);color:#fff}\n.faq-item .tra-loi{padding:0 22px 20px;color:var(--chu-nhe);font-size:.93rem}\n\n/* ===== CTA cuối ===== */\n.cta-cuoi{background:linear-gradient(135deg,var(--xanh-dam),var(--xanh-chinh));border-radius:var(--bo-goc-lon);padding:clamp(40px,6vw,70px);text-align:center;color:#fff;position:relative;overflow:hidden}\n.cta-cuoi::before{content:\"\";position:absolute;top:-90px;right:-60px;width:280px;height:280px;border-radius:50%;background:rgba(255,255,255,.08)}\n.cta-cuoi::after{content:\"\";position:absolute;bottom:-110px;left:-70px;width:320px;height:320px;border-radius:50%;background:rgba(255,255,255,.06)}\n.cta-cuoi h2{font-size:clamp(1.5rem,3vw,2.1rem);font-weight:800;margin-bottom:14px;position:relative;z-index:1}\n.cta-cuoi p{max-width:560px;margin:0 auto 28px;opacity:.9;position:relative;z-index:1}\n.cta-cuoi .hero-cta{justify-content:center;position:relative;z-index:1}\n.cta-cuoi .btn-chinh{background:#fff;color:var(--xanh-chinh);box-shadow:0 10px 26px rgba(0,0,0,.22)}\n.cta-cuoi .btn-chinh:hover{background:var(--xanh-nhat);color:var(--xanh-dam)}\n.cta-cuoi .btn-phu{background:transparent;color:#fff;border-color:rgba(255,255,255,.5)}\n.cta-cuoi .btn-phu:hover{background:rgba(255,255,255,.12);border-color:#fff}\n\n/* ===== FAB ===== */\n.fab-hotro{position:fixed;left:16px;bottom:96px;z-index:50;width:56px;height:56px;border-radius:50%;\n  background:var(--trang);border:2px solid var(--xanh-chinh);display:flex;align-items:center;justify-content:center;\n  font-size:1.5rem;box-shadow:0 6px 22px rgba(19,88,214,.35);opacity:.8;transition:transform .25s,opacity .25s,box-shadow .25s;animation:troi 3.4s ease-in-out infinite}\n@keyframes troi{0%,100%{transform:translateY(0)}50%{transform:translateY(-6px)}}\n.fab-hotro:hover{opacity:1;transform:scale(1.1);box-shadow:0 10px 30px rgba(19,88,214,.5);animation-play-state:paused}\n.fab-hotro:active{transform:scale(.94)}\n.fab-hotro .cham{position:absolute;top:2px;right:2px;width:12px;height:12px;border-radius:50%;background:var(--do-hot);border:2px solid #fff;animation:nhay 1.4s infinite}\n\n/* ===== Footer ===== */\n.site-footer{background:#0d2247;color:#c4d3ee;margin-top:var(--khoang)}\n.footer-main{display:grid;grid-template-columns:1.3fr 1fr 1fr 1.1fr;gap:40px;padding:56px 0 40px}\n.footer-brand .logo-text{color:#fff}\n.footer-brand .logo-text small{color:#7ba7f0}\n.footer-brand p{font-size:.88rem;margin-top:16px;color:#9db4dd}\n.footer-col h4{color:#fff;font-size:.95rem;font-weight:800;margin-bottom:16px}\n.footer-col ul{display:flex;flex-direction:column;gap:10px}\n.footer-col a{color:#c4d3ee;font-size:.88rem}\n.footer-col a:hover{color:#fff}\n.footer-col p{font-size:.88rem;color:#9db4dd}\n.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:20px 0;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;font-size:.8rem;color:#8ba2cc}\n\n/* ===== Responsive ===== */\n@media(max-width:1024px){\n  .hero-grid{grid-template-columns:1fr;gap:44px}\n  .hero-desc{max-width:none}\n  .live-grid{grid-template-columns:1fr;gap:36px}\n  .buoc-wrap{grid-template-columns:repeat(3,1fr)}\n  .xemlai-grid{grid-template-columns:repeat(2,1fr)}\n  .footer-main{grid-template-columns:1fr 1fr}\n  .nav-hot{display:none}\n  .header-search{max-width:300px}\n}\n@media(max-width:768px){\n  .header-top{flex-wrap:wrap;gap:12px}\n  .header-search{order:3;flex-basis:100%;max-width:none}\n  .main-nav ul{overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none}\n  .main-nav ul::-webkit-scrollbar{display:none}\n  .main-nav ul a{white-space:nowrap;padding:12px 13px;font-size:.92rem}\n  .buoc-wrap{grid-template-columns:repeat(2,1fr)}\n  .canh-grid{grid-template-columns:1fr;gap:28px}\n  .footer-main{grid-template-columns:1fr;gap:30px;padding:44px 0 32px}\n}\n@media(max-width:520px){\n  body{font-size:15px}\n  .btn-dangky{padding:9px 14px;font-size:.85rem}\n  .btn-dangnhap{font-size:.85rem}\n  .logo-text{font-size:.98rem}\n  .buoc-wrap{grid-template-columns:1fr}\n  .xemlai-grid{grid-template-columns:1fr}\n  .dem-nguoc div{width:64px}\n  .lo-trinh-item{flex-wrap:wrap}\n  .lo-trinh-item .thoi-luong{margin-left:60px}\n  .form-nhac form{flex-direction:column}\n  .form-nhac .btn-chinh{width:100%;justify-content:center}\n  .hero-cta{flex-direction:column;align-items:stretch}\n  .hero-cta a{justify-content:center}\n  .fab-hotro{width:50px;height:50px;left:12px;bottom:84px}\n}\n

/* roulang page: category3 */
:root{
  --blue-700:#1D4ED8;
  --blue-600:#2563EB;
  --blue-500:#3B82F6;
  --blue-100:#DBEAFE;
  --blue-50:#EFF6FF;
  --navy-900:#0F1E3D;
  --navy-800:#16294F;
  --ink:#1E293B;
  --ink-soft:#475569;
  --ink-faint:#94A3B8;
  --line:#E2E8F0;
  --bg:#F8FAFC;
  --white:#FFFFFF;
  --gold:#F59E0B;
  --red:#EF4444;
  --radius-lg:20px;
  --radius:14px;
  --radius-sm:9px;
  --shadow-card:0 8px 24px rgba(15,30,61,.08);
  --shadow-hover:0 16px 40px rgba(29,78,216,.16);
  --shadow-soft:0 2px 8px rgba(15,30,61,.06);
  --font:"Be Vietnam Pro","Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.65;font-size:16px;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:var(--blue-600);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--blue-700)}
button,input{font-family:inherit;font-size:inherit}
ul{list-style:none}
.container{max-width:1160px;margin:0 auto;padding:0 24px}

/* ============ HEADER ============ */
.site-header{position:sticky;top:0;z-index:100;background:var(--white);box-shadow:var(--shadow-soft)}
.header-top{display:flex;align-items:center;gap:28px;padding:14px 24px}
.logo{display:flex;align-items:center;gap:12px}
.logo-mark{width:42px;height:42px;border-radius:50%;flex:0 0 42px;background:conic-gradient(var(--blue-600) 0 60deg,var(--gold) 60deg 120deg,var(--blue-500) 120deg 180deg,#22C55E 180deg 240deg,var(--red) 240deg 300deg,var(--blue-700) 300deg 360deg);position:relative;box-shadow:inset 0 0 0 4px var(--white),0 0 0 2px var(--blue-100)}
.logo-mark::after{content:"";position:absolute;inset:14px;border-radius:50%;background:var(--white)}
.logo-text{font-weight:800;font-size:19px;color:var(--navy-900);line-height:1.15;display:flex;flex-direction:column}
.logo-text small{font-weight:600;font-size:11.5px;color:var(--blue-600);letter-spacing:.02em}
.header-search{flex:1;max-width:420px;display:flex;background:var(--bg);border:1px solid var(--line);border-radius:999px;overflow:hidden;transition:border-color .2s,box-shadow .2s}
.header-search:focus-within{border-color:var(--blue-500);box-shadow:0 0 0 3px var(--blue-100)}
.header-search input{flex:1;border:0;background:transparent;padding:10px 18px;outline:none;color:var(--ink);font-size:14.5px}
.header-search input::placeholder{color:var(--ink-faint)}
.header-search button{border:0;background:transparent;padding:0 16px;cursor:pointer;font-size:15px}
.header-auth{margin-left:auto;display:flex;align-items:center;gap:10px}
.btn-dangnhap{font-weight:600;color:var(--ink-soft);padding:9px 14px;border-radius:var(--radius-sm)}
.btn-dangnhap:hover{color:var(--blue-700);background:var(--blue-50)}
.btn-dangky{font-weight:700;color:#fff;background:linear-gradient(135deg,var(--blue-600),var(--blue-700));padding:10px 20px;border-radius:999px;box-shadow:0 4px 14px rgba(37,99,235,.35);transition:transform .2s,box-shadow .2s;white-space:nowrap}
.btn-dangky:hover{color:#fff;transform:translateY(-1px);box-shadow:0 8px 20px rgba(37,99,235,.45)}
.main-nav{background:var(--navy-900)}
.main-nav ul{display:flex;gap:4px}
.main-nav ul a{display:block;padding:13px 18px;color:#C7D5F2;font-weight:600;font-size:14.5px;border-bottom:3px solid transparent;transition:color .2s,border-color .2s,background .2s}
.main-nav ul a:hover{color:#fff;background:rgba(255,255,255,.06)}
.main-nav ul a.active{color:#fff;border-bottom-color:var(--gold)}
.nav-hot{margin-left:auto;color:#9FB3DC;font-size:13px;display:flex;align-items:center;gap:8px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.tag-hot{background:var(--red);color:#fff;font-size:10.5px;font-weight:800;padding:2.5px 8px;border-radius:5px;letter-spacing:.05em;animation:hotpulse 1.8s ease-in-out infinite}
@keyframes hotpulse{0%,100%{opacity:1}50%{opacity:.55}}

/* ============ HERO ============ */
.cat-hero{position:relative;background:var(--navy-900) url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;color:#fff;overflow:hidden}
.cat-hero::before{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(10,20,45,.96) 0%,rgba(13,28,60,.88) 45%,rgba(15,30,61,.55) 100%)}
.cat-hero .container{position:relative;display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center;padding-top:72px;padding-bottom:80px}
.hero-crumb{font-size:13.5px;color:#8FA6D6;margin-bottom:18px;display:flex;gap:8px;align-items:center}
.hero-crumb a{color:#B9CBF0}
.hero-crumb a:hover{color:#fff}
.hero-badge-row{display:flex;gap:10px;margin-bottom:20px;flex-wrap:wrap}
.hero-badge{display:inline-flex;align-items:center;gap:7px;font-size:12.5px;font-weight:700;padding:6px 14px;border-radius:999px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.18);color:#DCE7FB;backdrop-filter:blur(4px)}
.hero-badge.fire{background:rgba(239,68,68,.18);border-color:rgba(239,68,68,.45);color:#FECACA}
.cat-hero h1{font-size:42px;line-height:1.18;font-weight:800;letter-spacing:-.01em;margin-bottom:18px}
.cat-hero h1 em{font-style:normal;color:var(--gold)}
.hero-sub{font-size:17.5px;color:#C4D3EF;max-width:560px;margin-bottom:30px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.btn-primary{display:inline-flex;align-items:center;gap:9px;font-weight:700;font-size:16px;color:#fff;background:linear-gradient(135deg,var(--blue-500),var(--blue-700));padding:15px 30px;border-radius:999px;box-shadow:0 10px 28px rgba(37,99,235,.5);transition:transform .2s,box-shadow .2s}
.btn-primary:hover{color:#fff;transform:translateY(-2px);box-shadow:0 16px 36px rgba(37,99,235,.6)}
.btn-ghost{display:inline-flex;align-items:center;gap:8px;font-weight:600;font-size:15.5px;color:#E4ECFB;padding:14px 26px;border-radius:999px;border:1.5px solid rgba(255,255,255,.35);transition:background .2s,border-color .2s}
.btn-ghost:hover{color:#fff;background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.6)}
.hero-stats{display:flex;gap:36px;margin-top:38px}
.hero-stat b{display:block;font-size:26px;font-weight:800;color:#fff}
.hero-stat span{font-size:13px;color:#93A8D4}
.hero-poster{position:relative}
.hero-poster img{border-radius:var(--radius-lg);box-shadow:0 30px 60px rgba(0,0,0,.5);border:1px solid rgba(255,255,255,.15)}
.poster-tag{position:absolute;top:16px;left:16px;background:var(--red);color:#fff;font-weight:800;font-size:12px;padding:6px 14px;border-radius:8px;letter-spacing:.06em;box-shadow:0 6px 16px rgba(239,68,68,.5)}
.poster-note{position:absolute;bottom:-18px;right:22px;background:var(--white);color:var(--ink);border-radius:var(--radius);padding:13px 20px;box-shadow:var(--shadow-hover);font-size:13.5px;display:flex;align-items:center;gap:10px}
.poster-note b{color:var(--blue-700)}

/* ============ SECTION BASE ============ */
.section{padding:84px 0}
.section.alt{background:var(--white)}
.sec-head{max-width:680px;margin-bottom:44px}
.sec-eyebrow{display:inline-block;font-size:12.5px;font-weight:800;letter-spacing:.1em;text-transform:uppercase;color:var(--blue-600);background:var(--blue-50);border:1px solid var(--blue-100);padding:5px 14px;border-radius:999px;margin-bottom:14px}
.sec-head h2{font-size:31px;font-weight:800;color:var(--navy-900);line-height:1.25;margin-bottom:12px;letter-spacing:-.01em}
.sec-head p{color:var(--ink-soft);font-size:16.5px}

/* ============ FEATURED / COUNTDOWN ============ */
.feature-event{display:grid;grid-template-columns:.9fr 1.1fr;background:var(--white);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-card)}
.feature-media{position:relative;min-height:340px}
.feature-media img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0}
.feature-media .live-chip{position:absolute;top:18px;left:18px;background:rgba(15,30,61,.85);color:#fff;font-weight:700;font-size:12.5px;padding:7px 14px;border-radius:999px;display:flex;align-items:center;gap:8px;backdrop-filter:blur(4px)}
.live-dot{width:8px;height:8px;border-radius:50%;background:var(--red);animation:hotpulse 1.4s infinite}
.feature-body{padding:44px 48px}
.feature-body h3{font-size:25px;font-weight:800;color:var(--navy-900);margin:10px 0 12px}
.feature-body>p{color:var(--ink-soft);margin-bottom:26px}
.countdown{display:flex;gap:14px;margin-bottom:28px}
.cd-cell{background:var(--blue-50);border:1px solid var(--blue-100);border-radius:var(--radius);padding:14px 0;text-align:center;flex:1;max-width:96px}
.cd-cell b{display:block;font-size:28px;font-weight:800;color:var(--blue-700);font-variant-numeric:tabular-nums}
.cd-cell span{font-size:11.5px;color:var(--ink-faint);font-weight:600;text-transform:uppercase;letter-spacing:.06em}
.feature-points{margin-bottom:30px}
.feature-points li{position:relative;padding-left:30px;margin-bottom:11px;color:var(--ink);font-size:15.5px}
.feature-points li::before{content:"✔";position:absolute;left:0;top:1px;width:20px;height:20px;border-radius:50%;background:var(--blue-100);color:var(--blue-700);font-size:11px;display:flex;align-items:center;justify-content:center;font-weight:800}
.remind-row{display:flex;gap:12px;flex-wrap:wrap}
.btn-outline{display:inline-flex;align-items:center;gap:8px;font-weight:700;font-size:15px;color:var(--blue-700);border:1.5px solid var(--blue-500);padding:12px 24px;border-radius:999px;transition:background .2s}
.btn-outline:hover{background:var(--blue-50)}

/* ============ TEMPLATE GRID ============ */
.tpl-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.tpl-card{background:var(--white);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-card);transition:transform .25s ease,box-shadow .25s ease;display:flex;flex-direction:column}
.tpl-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.tpl-thumb{position:relative;aspect-ratio:16/10;overflow:hidden}
.tpl-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.tpl-card:hover .tpl-thumb img{transform:scale(1.05)}
.tpl-tag{position:absolute;top:14px;left:14px;font-size:11px;font-weight:800;letter-spacing:.05em;padding:5px 12px;border-radius:6px;color:#fff;background:var(--blue-600);box-shadow:0 4px 10px rgba(37,99,235,.4)}
.tpl-tag.tet{background:var(--red)}
.tpl-tag.gold{background:var(--gold)}
.tpl-body{padding:22px 24px 26px;display:flex;flex-direction:column;flex:1}
.tpl-body h3{font-size:18px;font-weight:800;color:var(--navy-900);margin-bottom:8px;line-height:1.35}
.tpl-body p{font-size:14.5px;color:var(--ink-soft);margin-bottom:16px;flex:1}
.tpl-meta{display:flex;align-items:center;justify-content:space-between;border-top:1px solid var(--line);padding-top:14px;font-size:13px}
.tpl-meta span{color:var(--ink-faint)}
.tpl-meta a{font-weight:700;font-size:14px}
.tpl-meta a::after{content:" →";transition:margin .2s}
.tpl-meta a:hover::after{margin-left:3px}

/* ============ SCENARIOS ============ */
.scene-wrap{display:grid;grid-template-columns:.95fr 1.05fr;gap:56px;align-items:center}
.scene-img{border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-card)}
.scene-list li{display:flex;gap:18px;padding:20px 0;border-bottom:1px solid var(--line)}
.scene-list li:last-child{border-bottom:0}
.scene-ico{flex:0 0 48px;height:48px;border-radius:var(--radius);background:var(--blue-50);border:1px solid var(--blue-100);display:flex;align-items:center;justify-content:center;font-size:21px}
.scene-list h3{font-size:17px;font-weight:800;color:var(--navy-900);margin-bottom:4px}
.scene-list p{font-size:14.5px;color:var(--ink-soft)}

/* ============ STEPS ============ */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;counter-reset:step}
.step{position:relative;background:var(--white);border-radius:var(--radius-lg);padding:30px 26px 28px;box-shadow:var(--shadow-card)}
.step::before{counter-increment:step;content:"0" counter(step);font-size:38px;font-weight:800;color:var(--blue-100);line-height:1;display:block;margin-bottom:14px}
.step h3{font-size:16.5px;font-weight:800;color:var(--navy-900);margin-bottom:8px}
.step p{font-size:14px;color:var(--ink-soft)}

/* ============ FAQ ============ */
.faq-list{max-width:820px}
.faq-item{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);margin-bottom:14px;overflow:hidden;transition:box-shadow .2s}
.faq-item[open]{box-shadow:var(--shadow-card);border-color:var(--blue-100)}
.faq-item summary{cursor:pointer;list-style:none;padding:19px 24px;font-weight:700;font-size:16px;color:var(--navy-900);display:flex;justify-content:space-between;align-items:center;gap:16px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:22px;font-weight:600;color:var(--blue-600);flex:0 0 auto;transition:transform .2s}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item div{padding:0 24px 21px;color:var(--ink-soft);font-size:15px}

/* ============ CTA ============ */
.cta-band{background:linear-gradient(120deg,var(--navy-900),var(--blue-700));border-radius:var(--radius-lg);padding:64px 56px;text-align:center;color:#fff;position:relative;overflow:hidden}
.cta-band::before{content:"";position:absolute;width:340px;height:340px;border-radius:50%;background:rgba(255,255,255,.06);top:-160px;right:-100px}
.cta-band::after{content:"";position:absolute;width:240px;height:240px;border-radius:50%;background:rgba(245,158,11,.12);bottom:-130px;left:-70px}
.cta-band h2{font-size:30px;font-weight:800;margin-bottom:14px;position:relative}
.cta-band p{color:#C9D8F5;max-width:600px;margin:0 auto 30px;position:relative}
.cta-band .btn-primary{background:#fff;color:var(--blue-700);box-shadow:0 12px 30px rgba(0,0,0,.3);position:relative}
.cta-band .btn-primary:hover{color:var(--blue-700)}

/* ============ FOOTER ============ */
.site-footer{background:var(--navy-900);color:#AEBEDF;margin-top:84px}
.footer-main{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:44px;padding:64px 0 48px}
.footer-brand .logo-text{color:#fff}
.footer-brand .logo-text small{color:#8CA6DE}
.footer-brand p{font-size:14px;margin-top:18px;color:#8FA3CC}
.footer-col h4{color:#fff;font-size:15px;font-weight:800;margin-bottom:16px;letter-spacing:.02em}
.footer-col ul li{margin-bottom:10px}
.footer-col a{color:#AEBEDF;font-size:14px}
.footer-col a:hover{color:#fff}
.footer-col p{font-size:14px;color:#8FA3CC}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:22px 0;display:flex;justify-content:space-between;gap:16px;font-size:13px;color:#7288B5;flex-wrap:wrap}

/* ============ FAB ============ */
.fab-support{position:fixed;left:16px;bottom:96px;z-index:50;display:flex;align-items:center;gap:10px;background:var(--white);border:1.5px solid var(--blue-100);border-radius:999px;padding:12px 20px 12px 14px;box-shadow:0 10px 30px rgba(29,78,216,.25);font-weight:700;font-size:14px;color:var(--blue-700);opacity:.9;transition:transform .2s,box-shadow .2s,opacity .2s;min-height:48px}
.fab-support:hover{opacity:1;transform:scale(1.06);box-shadow:0 16px 40px rgba(29,78,216,.35);color:var(--blue-700)}
.fab-support:active{transform:scale(.95) translateY(1px)}
.fab-ico{width:34px;height:34px;border-radius:50%;background:linear-gradient(135deg,var(--blue-500),var(--blue-700));display:flex;align-items:center;justify-content:center;font-size:16px;color:#fff;animation:fabfloat 3s ease-in-out infinite}
.fab-dot{position:absolute;top:6px;right:10px;width:9px;height:9px;border-radius:50%;background:var(--red);animation:hotpulse 1.6s infinite}
@keyframes fabfloat{0%,100%{transform:translateY(0)}50%{transform:translateY(-3px)}}

/* ============ RESPONSIVE ============ */
@media (max-width:1024px){
  .cat-hero .container{grid-template-columns:1fr;gap:44px;padding-top:56px;padding-bottom:64px}
  .cat-hero h1{font-size:34px}
  .hero-poster{max-width:520px}
  .tpl-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .footer-main{grid-template-columns:1fr 1fr}
  .header-search{max-width:300px}
  .nav-hot{display:none}
}
@media (max-width:768px){
  .header-top{flex-wrap:wrap;gap:14px}
  .header-search{order:3;flex:1 1 100%;max-width:none}
  .header-auth{margin-left:auto}
  .main-nav .container{overflow-x:auto}
  .main-nav ul{white-space:nowrap}
  .main-nav ul a{padding:12px 14px;font-size:14px}
  .section{padding:64px 0}
  .feature-event{grid-template-columns:1fr}
  .feature-media{min-height:240px}
  .feature-media img{position:relative}
  .feature-body{padding:32px 28px}
  .scene-wrap{grid-template-columns:1fr;gap:36px}
  .sec-head h2{font-size:26px}
  .cta-band{padding:52px 32px}
}
@media (max-width:520px){
  .cat-hero h1{font-size:28px}
  .hero-sub{font-size:16px}
  .hero-stats{gap:22px;flex-wrap:wrap}
  .tpl-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .countdown{gap:10px}
  .cd-cell b{font-size:22px}
  .footer-main{grid-template-columns:1fr;gap:32px}
  .footer-bottom{flex-direction:column;text-align:left}
  .btn-primary,.btn-ghost{width:100%;justify-content:center}
  .remind-row .btn-primary,.remind-row .btn-outline{width:100%;justify-content:center}
  .cta-band h2{font-size:24px}
  .btn-dangnhap{padding:9px 8px}
  .btn-dangky{padding:10px 14px;font-size:14px}
  .poster-note{position:static;margin-top:16px;justify-content:center}
}