#tvst-sales{--navy:#273880;--navy-dk:#1c2a63;--navy-soft:#eef0f8;--red:#b62025;--red-dk:#8f181c;--red-soft:#faeaea;--bg:#f6f7fb;--paper:#fff;--ink:#1c2138;--ink-soft:#565c78;--line:#e4e7f1;--r-lg:26px;--r-md:18px;--r-sm:13px;--shadow:0 18px 40px -24px #2738806b;--shadow-sm:0 10px 26px -20px #27388073;--max:1180px;--font-heading:var(--font-sans), sans-serif;font-family:var(--font-heading);color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;line-height:1.65;position:relative;overflow:hidden}#tvst-sales *,#tvst-sales :before,#tvst-sales :after{box-sizing:border-box}#tvst-sales img{max-width:100%;display:block}#tvst-sales a{color:inherit;text-decoration:none}#tvst-sales h1,#tvst-sales h2,#tvst-sales h3,#tvst-sales h4{font-family:var(--font-heading);letter-spacing:-.01em;color:var(--navy);margin:0;font-weight:800;line-height:1.25}#tvst-sales p{margin:0}#tvst-sales [id]{scroll-margin-top:90px}#tvst-sales:before,#tvst-sales:after{content:"";filter:blur(12px);opacity:.14;z-index:0;pointer-events:none;background:var(--navy);border-radius:50%;position:absolute}#tvst-sales:before{width:300px;height:300px;top:-80px;left:-90px}#tvst-sales:after{background:var(--red);opacity:.1;width:240px;height:240px;top:640px;right:-90px}#tvst-sales .container{max-width:var(--max);margin-inline:auto;padding-inline:22px}#tvst-sales section{z-index:1;position:relative}#tvst-sales .section{padding:84px 0}#tvst-sales .section.muted{background:var(--paper)}#tvst-sales .eyebrow,#tvst-sales .label{font-family:var(--font-heading);letter-spacing:.16em;text-transform:uppercase;color:var(--navy);background:var(--navy-soft);border-radius:8px;align-items:center;gap:8px;margin-bottom:18px;padding:7px 16px;font-size:12.5px;font-weight:800;display:inline-flex}#tvst-sales .eyebrow:before,#tvst-sales .label:before{content:"";background:currentColor;border-radius:50%;width:7px;height:7px}#tvst-sales .accent,#tvst-sales .text-gold{color:var(--red);font-weight:800}#tvst-sales .btn{font-family:var(--font-heading);letter-spacing:.01em;cursor:pointer;text-align:center;border:none;border-radius:12px;justify-content:center;align-items:center;gap:10px;padding:15px 28px;font-size:16px;font-weight:800;transition:transform .2s,background .2s,box-shadow .2s;display:inline-flex}#tvst-sales .btn-primary{color:#fff;background:var(--red);animation:1.6s ease-in-out infinite prtZoom;box-shadow:0 10px 24px -12px #b6202599}#tvst-sales .btn-primary:hover{background:var(--red-dk);animation-play-state:paused}@keyframes prtZoom{0%,to{transform:scale(1)}50%{transform:scale(1.04)}}@media (prefers-reduced-motion:reduce){#tvst-sales .btn-primary{animation:none}}#tvst-sales .btn-ghost{color:var(--navy);box-shadow:inset 0 0 0 2px var(--line);background:#fff}#tvst-sales .btn-ghost:hover{box-shadow:inset 0 0 0 2px var(--navy);transform:translateY(-3px)}#tvst-sales .section-head{text-align:center;max-width:800px;margin:0 auto 46px}#tvst-sales .section-head h2{font-size:clamp(26px,3.6vw,38px);line-height:1.22}#tvst-sales .section-head p{color:var(--ink-soft);margin-top:14px;font-size:16px}#tvst-sales .card,#tvst-sales .soft-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--shadow-sm)}#tvst-sales .hero{background:linear-gradient(180deg, #fff 0%, var(--bg) 100%);padding:74px 0 64px}#tvst-sales .hero-grid{grid-template-columns:1.05fr .95fr;align-items:center;gap:48px;display:grid}#tvst-sales .hero-copy h1{margin:6px 0 18px;font-size:clamp(30px,4.4vw,48px);line-height:1.16}#tvst-sales .hero-copy .lead{color:var(--ink-soft);font-size:17px;line-height:1.7}#tvst-sales .hero-proof{flex-wrap:wrap;gap:12px;margin:26px 0;display:flex}#tvst-sales .proof-pill{border:1px solid var(--line);box-shadow:var(--shadow-sm);background:#fff;border-radius:14px;flex-direction:column;gap:2px;padding:12px 16px;display:flex}#tvst-sales .proof-pill strong{font-family:var(--font-heading);color:var(--navy);font-size:20px;font-weight:900;line-height:1}#tvst-sales .proof-pill small{color:var(--ink-soft);font-size:12.5px;font-weight:600}#tvst-sales .hero-actions{flex-wrap:wrap;gap:14px;margin-top:8px;display:flex}#tvst-sales .hero-side{flex-direction:column;gap:20px;display:flex}#tvst-sales .hero-video{padding:12px;overflow:hidden}#tvst-sales .hero-video-caption{gap:12px;padding:14px 8px 6px;display:flex}#tvst-sales .hero-video-caption strong{font-family:var(--font-heading);color:var(--navy);font-size:15px;font-weight:800;display:block}#tvst-sales .hero-video-caption span{color:var(--ink-soft);margin-top:3px;font-size:13px;display:block}#tvst-sales .hero-class{padding:22px}#tvst-sales .hero-class-top{justify-content:space-between;align-items:flex-start;margin-bottom:8px;display:flex}#tvst-sales .hero-class-price{font-family:var(--font-heading);color:var(--red);margin-top:4px;font-size:26px;font-weight:900;line-height:1.1}#tvst-sales .hero-class-list{flex-direction:column;gap:14px;display:flex}#tvst-sales .hero-class-column h3{color:var(--navy);margin-bottom:8px;font-size:16px}#tvst-sales .class-grid{grid-template-columns:1fr 1fr;gap:10px;display:grid}#tvst-sales .class-item{background:var(--bg);border:1px solid var(--line);border-radius:10px;flex-direction:column;gap:2px;padding:10px 12px;display:flex}#tvst-sales .class-item strong{color:var(--ink-soft);text-transform:uppercase;letter-spacing:.04em;font-size:11.5px;font-weight:700}#tvst-sales .class-item span{color:var(--ink);font-size:13.5px;font-weight:600}#tvst-sales .value-strip{grid-template-columns:repeat(4,1fr);gap:18px;margin-top:46px;display:grid}#tvst-sales .value-strip>div{background:var(--paper);border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--shadow-sm);padding:22px}#tvst-sales .value-strip strong{font-family:var(--font-heading);color:var(--navy);margin-bottom:8px;font-size:16px;font-weight:800;display:block}#tvst-sales .value-strip span{color:var(--ink-soft);font-size:14px}#tvst-sales .grid-3{grid-template-columns:repeat(3,1fr);gap:22px;display:grid}#tvst-sales .grid-2{grid-template-columns:repeat(2,1fr);gap:22px;display:grid}#tvst-sales .problem-card,#tvst-sales .method-card,#tvst-sales .result-card,#tvst-sales .fit-card,#tvst-sales .feature-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--shadow-sm);padding:30px 26px;transition:transform .3s,box-shadow .3s,border-color .3s}#tvst-sales .problem-card:hover,#tvst-sales .method-card:hover,#tvst-sales .result-card:hover,#tvst-sales .fit-card:hover,#tvst-sales .feature-card:hover{box-shadow:var(--shadow);border-color:#d6daec;transform:translateY(-6px)}#tvst-sales .card-num{background:var(--navy-soft);min-width:46px;height:46px;color:var(--navy);font-family:var(--font-heading);border-radius:12px;justify-content:center;align-items:center;margin-bottom:18px;padding:0 12px;font-size:18px;font-weight:900;display:inline-flex}#tvst-sales .method-card .card-num{background:var(--red-soft);color:var(--red)}#tvst-sales .card-title{color:var(--navy);margin-bottom:10px;font-size:19px}#tvst-sales .card-text{color:var(--ink-soft);font-size:14.5px;line-height:1.6}#tvst-sales .promise-grid{grid-template-columns:1.25fr .75fr;align-items:stretch;gap:24px;display:grid}#tvst-sales .promise-box{padding:40px 34px}#tvst-sales .promise-box h3{color:var(--navy);margin:12px 0 14px;font-size:24px;line-height:1.3}#tvst-sales .promise-box p{color:var(--ink-soft);font-size:15.5px}#tvst-sales .quote-box{border-left:4px solid var(--red);padding:32px 28px}#tvst-sales .quote-box p{color:var(--ink);font-size:15.5px;font-style:italic}#tvst-sales .roadmap{flex-direction:column;gap:16px;max-width:860px;margin:0 auto;display:flex}#tvst-sales .roadmap-item{background:var(--paper);border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--shadow-sm);align-items:flex-start;gap:20px;padding:24px 26px;display:flex}#tvst-sales .roadmap-badge{background:var(--navy);color:#fff;width:48px;height:48px;font-family:var(--font-heading);border-radius:50%;flex-shrink:0;place-items:center;font-size:18px;font-weight:900;display:grid}#tvst-sales .roadmap-item strong{font-family:var(--font-heading);color:var(--navy);margin-bottom:6px;font-size:17px;font-weight:800;display:block}#tvst-sales .roadmap-item p{color:var(--ink-soft);font-size:14.5px}#tvst-sales .testimonial-section{background:var(--paper)}#tvst-sales .testi-inner{max-width:1000px;margin:0 auto}#tvst-sales .testi-stats-bar{grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:40px;display:grid}#tvst-sales .testi-stat-block{background:var(--bg);border:1px solid var(--line);border-radius:var(--r-md);text-align:center;padding:22px 16px}#tvst-sales .testi-stat-block strong{font-family:var(--font-heading);color:var(--red);font-size:30px;font-weight:900;line-height:1;display:block}#tvst-sales .testi-stat-block span{color:var(--ink-soft);margin-top:6px;font-size:13px;display:block}#tvst-sales .pricing-shell{text-align:center;max-width:920px;margin:0 auto;padding:44px 36px}#tvst-sales .pricing-shell h3{color:var(--navy);margin:10px 0 12px;font-size:26px}#tvst-sales .pricing-shell>p{color:var(--ink-soft);max-width:640px;margin:0 auto 12px;font-size:15.5px}#tvst-sales .pricing-class-list{text-align:left;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px;margin:28px 0;display:grid}#tvst-sales .pricing-status{text-align:center;color:var(--ink-soft);grid-column:1/-1;padding:30px 0}#tvst-sales .pricing-class-card{background:var(--bg);border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--shadow-sm);padding:22px}#tvst-sales .pricing-class-head{justify-content:space-between;align-items:center;margin-bottom:14px;display:flex}#tvst-sales .pricing-class-code{font-family:var(--font-heading);color:var(--navy);font-size:18px;font-weight:900}#tvst-sales .pricing-class-badge{letter-spacing:.06em;color:var(--red);background:var(--red-soft);border-radius:20px;padding:5px 12px;font-size:11px;font-weight:800}#tvst-sales .pricing-table{flex-direction:column;gap:8px;margin-bottom:16px;display:flex}#tvst-sales .pricing-row{border-bottom:1px dashed var(--line);justify-content:space-between;gap:12px;padding-bottom:8px;font-size:13.5px;display:flex}#tvst-sales .pricing-row span:first-child{color:var(--ink-soft)}#tvst-sales .pricing-row span:last-child{color:var(--ink);text-align:right;font-weight:700}#tvst-sales .pricing-class-price{justify-content:space-between;align-items:center;margin-bottom:16px;display:flex}#tvst-sales .pricing-class-price span{color:var(--ink-soft);font-size:13px}#tvst-sales .pricing-class-price strong{font-family:var(--font-heading);color:var(--red);font-size:22px;font-weight:900}#tvst-sales .pricing-cta .btn{width:100%}#tvst-sales .pricing-extra{text-align:left;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:24px;display:grid}#tvst-sales .pricing-extra>div{background:var(--bg);border:1px solid var(--line);border-radius:var(--r-md);padding:20px}#tvst-sales .pricing-extra strong{font-family:var(--font-heading);color:var(--navy);margin-bottom:6px;font-size:15px;font-weight:800;display:block}#tvst-sales .pricing-extra span{color:var(--ink-soft);font-size:13.5px}#tvst-sales .faq-wrap{grid-template-columns:1fr 1fr;gap:18px;max-width:980px;margin:0 auto;display:grid}#tvst-sales .faq-item{background:var(--paper);border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--shadow-sm);padding:26px}#tvst-sales .faq-item h3{color:var(--navy);margin-bottom:10px;font-size:16.5px}#tvst-sales .faq-item p{color:var(--ink-soft);font-size:14.5px;line-height:1.6}#tvst-sales .final-cta{background:linear-gradient(180deg, var(--bg), #fff)}#tvst-sales .final-box{background:linear-gradient(135deg, var(--navy), var(--navy-dk));border-radius:var(--r-lg);text-align:center;max-width:960px;box-shadow:var(--shadow);margin:0 auto;padding:56px 44px;position:relative;overflow:hidden}#tvst-sales .final-box .label{color:#fff;background:#ffffff29}#tvst-sales .final-box h2{color:#fff;margin-bottom:16px;font-size:clamp(24px,3.4vw,34px);line-height:1.3}#tvst-sales .final-box .text-gold{color:#ffd76a}#tvst-sales .final-box p{color:#ffffffdb;max-width:720px;margin:0 auto 24px;font-size:16px}#tvst-sales .final-checks{margin-top:8px}#tvst-sales .check-grid{margin:0;text-align:left;grid-template-columns:1fr 1fr;gap:12px 24px;max-width:680px;margin-inline:auto;padding:0;list-style:none;display:grid}#tvst-sales .check-grid li{color:var(--ink);padding-left:30px;font-size:14.5px;line-height:1.55;position:relative}#tvst-sales .final-checks .check-grid li{color:#ffffffe6}#tvst-sales .quote-box .check-grid{max-width:none;margin-inline:0}@media (max-width:640px){#tvst-sales .check-grid{grid-template-columns:1fr}}#tvst-sales .check-grid li:before{content:"✓";background:var(--red);color:#fff;border-radius:50%;place-items:center;width:20px;height:20px;font-size:12px;display:grid;position:absolute;top:0;left:0}@media (max-width:960px){#tvst-sales .hero-grid,#tvst-sales .promise-grid{grid-template-columns:1fr}#tvst-sales .grid-3,#tvst-sales .value-strip,#tvst-sales .testi-stats-bar,#tvst-sales .pricing-extra{grid-template-columns:repeat(2,1fr)}}@media (max-width:640px){#tvst-sales .section{padding:60px 0}#tvst-sales .grid-2,#tvst-sales .grid-3,#tvst-sales .value-strip,#tvst-sales .testi-stats-bar,#tvst-sales .faq-wrap,#tvst-sales .pricing-extra,#tvst-sales .class-grid,#tvst-sales .check-grid{grid-template-columns:1fr}#tvst-sales .final-box,#tvst-sales .promise-box,#tvst-sales .pricing-shell{padding-inline:22px}}#tvst-sales .final-box .accent{color:#ffd76a}#tvst-sales .compare{background:var(--line);border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--shadow-sm);grid-template-columns:1fr 1fr;gap:1px;display:grid;overflow:hidden}#tvst-sales .compare>div{background:var(--paper);padding:14px 18px;font-size:15px;line-height:1.6}#tvst-sales .compare .compare-head{background:var(--navy);color:#fff;letter-spacing:.05em;text-transform:uppercase;z-index:1;font-size:12.5px;font-weight:800;position:sticky;top:0}#tvst-sales .compare .compare-old{color:var(--ink-soft);background:#fbfbfd}#tvst-sales .compare .compare-new{color:var(--ink);font-weight:600}@media (max-width:720px){#tvst-sales .compare{grid-template-columns:1fr}#tvst-sales .compare .compare-head{display:none}#tvst-sales .compare>div:before{letter-spacing:.05em;text-transform:uppercase;margin-bottom:4px;font-size:11px;font-weight:800;display:block}#tvst-sales .compare .compare-old:before{content:"Cách học cũ";color:var(--ink-soft)}#tvst-sales .compare .compare-new:before{content:"Từ Vựng Siêu Tốc";color:var(--red)}}#tvst-sales .prose-block{max-width:780px;margin-inline:auto}#tvst-sales .prose-block p{margin-bottom:14px;font-size:16px;line-height:1.75}#tvst-sales .prose-block p:last-child{margin-bottom:0}