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0%,rgba(10,18,48,.85) 110%);color:#fff;border:1.5px solid rgba(255,255,255,.22);box-shadow:0 10px 22px #00000061,inset 0 1px #ffffff38;font-size:26px}.features-section-dark .feature h3{color:var(--gold-500);font-weight:700;letter-spacing:-.01em}.features-section-dark .feature p{color:#fffc;line-height:1.65}.video-section{background:var(--canvas-2);position:relative;overflow:hidden}.video-section:before{content:"";position:absolute;width:500px;height:500px;background:radial-gradient(circle,rgba(43,79,158,.08),transparent 70%);top:-150px;right:-100px;pointer-events:none}.video-featured{margin-bottom:32px;background:var(--surface);border-radius:var(--r-xl);overflow:hidden;box-shadow:var(--shadow-xl);border:1px solid var(--border);position:relative}.video-featured-content{display:grid;grid-template-columns:1.4fr 1fr;align-items:stretch}@media(max-width:900px){.video-featured-content{grid-template-columns:1fr}}.video-featured .video-player{background:linear-gradient(135deg,var(--brand-900),var(--brand-700))}.video-featured .video-meta{padding:40px;display:flex;flex-direction:column;justify-content:center}.video-featured .video-meta h3{font-size:clamp(1.4rem,2.2vw,1.875rem);color:var(--brand-700);margin-bottom:12px;line-height:1.25}.video-featured .video-meta p{margin-bottom:24px;font-size:1.05rem}.video-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:28px}@media(max-width:560px){.video-grid{grid-template-columns:1fr}}.video-card{background:var(--surface);border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--border);transition:transform .3s var(--ease-out),box-shadow .3s,border-color .3s;cursor:pointer}.video-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--brand-200)}.video-player{position:relative;width:100%;padding-top:56.25%;background:linear-gradient(135deg,var(--brand-800),var(--brand-600));overflow:hidden}.video-player iframe,.video-player>.video-placeholder{position:absolute;inset:0;width:100%;height:100%;border:0}.video-placeholder{display:grid;place-items:center;text-align:center;color:#ffffffd9;padding:20px}.video-play-icon{width:64px;height:64px;background:#fffffff2;border-radius:50%;display:grid;place-items:center;margin:0 auto 14px;color:var(--brand-700);font-size:24px;box-shadow:0 8px 24px #0000004d;transition:transform .25s var(--ease-out)}.video-card:hover .video-play-icon{transform:scale(1.1)}.video-placeholder-text{font-size:13px;font-weight:500;letter-spacing:.02em}.video-duration{position:absolute;bottom:10px;right:10px;background:#000000b3;color:#fff;padding:3px 9px;border-radius:4px;font-size:11px;font-weight:600;backdrop-filter:blur(4px)}.video-meta{padding:18px 20px}.video-card .video-meta h4{font-size:15px;color:var(--brand-700);margin-bottom:6px;line-height:1.35}.video-tag{display:inline-block;font-size:11px;font-weight:600;color:var(--brand-600);background:var(--brand-50);padding:3px 10px;border-radius:var(--r-pill);margin-bottom:10px;letter-spacing:.03em;text-transform:uppercase}.video-info{display:flex;gap:14px;font-size:12px;color:var(--ink-400)}.security-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-bottom:40px}@media(max-width:900px){.security-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:520px){.security-grid{grid-template-columns:1fr}}.security-card{background:#ffffff0a;border:1px solid rgba(255,255,255,.1);border-radius:var(--r-lg);padding:28px 24px;backdrop-filter:blur(12px);transition:transform .3s var(--ease-out),background .3s}.security-card:hover{transform:translateY(-3px);background:#ffffff12}.security-card .icon-wrap{width:44px;height:44px;border-radius:12px;background:#ffc10726;color:var(--gold-500);display:grid;place-items:center;font-size:20px;margin-bottom:16px}.security-card h3{color:#fff;font-size:1.05rem;margin-bottom:8px}.security-card p{color:#ffffffb3;font-size:14px;line-height:1.55}.security-callout{text-align:center;padding:28px 32px;background:#ffc10714;border:1px solid rgba(255,193,7,.25);border-radius:var(--r-lg);color:#fff;backdrop-filter:blur(8px)}.security-callout a{color:var(--gold-500);font-weight:600;border-bottom:1px solid currentColor}.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;counter-reset:step}@media(max-width:840px){.steps{grid-template-columns:1fr}}.step{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-xl);padding:40px 32px 32px;position:relative;counter-increment:step;transition:all .3s var(--ease-out)}.step:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--brand-200)}.step:before{content:counter(step);position:absolute;top:-24px;left:32px;width:52px;height:52px;background:linear-gradient(135deg,var(--brand-700),var(--brand-600));color:#fff;border-radius:16px;display:grid;place-items:center;font-weight:800;font-size:20px;box-shadow:var(--shadow-brand)}.step h3{color:var(--brand-700);margin-top:12px;margin-bottom:12px;font-size:1.2rem}.step kbd{background:var(--canvas-2);border:1px solid var(--border);padding:2px 8px;border-radius:5px;font-family:ui-monospace,SF Mono,Menlo,monospace;font-size:13px;font-weight:500;color:var(--ink-700);box-shadow:0 1px 0 var(--border-strong)}.pricing-card{max-width:500px;margin:0 auto;background:var(--surface);border:1px solid var(--border);border-radius:var(--r-xl);padding:48px 40px;text-align:center;box-shadow:var(--shadow-xl);position:relative;overflow:hidden}.pricing-card:before{content:"";position:absolute;top:0;left:0;right:0;height:6px;background:linear-gradient(90deg,var(--brand-600),var(--gold-500))}.pricing-badge{position:absolute;top:20px;right:20px;background:linear-gradient(135deg,var(--gold-500),var(--gold-400));color:var(--brand-900);padding:6px 14px;border-radius:var(--r-pill);font-weight:700;font-size:12px;letter-spacing:.02em;box-shadow:var(--shadow-sm)}.pricing-card h3{color:var(--brand-700);margin-top:8px;font-size:1.25rem;font-weight:600;margin-bottom:16px}.price{font-size:clamp(2.75rem,5vw,3.75rem);font-weight:800;background:linear-gradient(135deg,var(--brand-700),var(--brand-500));-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1;letter-spacing:-.03em;margin-bottom:8px}.price sup{font-size:.4em;color:var(--brand-600);-webkit-text-fill-color:currentColor;vertical-align:super;margin-left:4px;font-weight:700}.price-period{color:var(--ink-400);font-size:.95rem}.pricing-list{list-style:none;margin:32px 0;text-align:left;display:flex;flex-direction:column;gap:14px}.pricing-list li{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:var(--ink-700)}.pricing-list .check{flex-shrink:0;width:20px;height:20px;background:var(--success-light);color:var(--success);border-radius:50%;display:grid;place-items:center;font-size:11px;font-weight:800;margin-top:2px}.pricing-foot{margin-top:18px;font-size:13px;color:var(--ink-400)}.fab-zalo{position:fixed;bottom:20px;right:20px;z-index:999;display:inline-flex;align-items:center;gap:10px;padding:12px 18px 12px 14px;background:linear-gradient(135deg,#0084ff,#0068ff);color:#fff;border-radius:999px;text-decoration:none;font-weight:600;box-shadow:0 10px 28px #0068ff6b,0 4px 12px #0000001a;transition:transform .25s var(--ease-out),box-shadow .25s var(--ease-out);animation:fabPulse 2.4s ease-in-out infinite}.fab-zalo:hover{transform:translateY(-3px) scale(1.04);color:#fff;box-shadow:0 16px 36px #0068ff85,0 6px 16px #00000024}.fab-zalo:active{transform:translateY(-1px) scale(.98)}.fab-zalo-icon{display:inline-grid;place-items:center;width:38px;height:38px;background:#ffffff2e;border-radius:50%;flex-shrink:0}.fab-zalo-text{display:flex;flex-direction:column;line-height:1.15}.fab-zalo-line1{font-size:12px;font-weight:600;opacity:.92;letter-spacing:.2px}.fab-zalo-line2{font-size:15px;font-weight:700;letter-spacing:.6px;font-variant-numeric:tabular-nums}@keyframes fabPulse{0%,to{box-shadow:0 10px 28px #0068ff6b,0 4px 12px #0000001a,0 0 #0084ff8c}50%{box-shadow:0 10px 28px #0068ff6b,0 4px 12px #0000001a,0 0 0 18px #0084ff00}}@media(max-width:640px){.fab-zalo{bottom:16px;right:16px;padding:10px 16px 10px 12px}.fab-zalo-icon{width:34px;height:34px}.fab-zalo-icon svg{width:22px;height:22px}.fab-zalo-line1{font-size:13px}.fab-zalo-line2{display:none}}@media(max-width:380px){.fab-zalo-text{display:none}.fab-zalo{padding:10px;border-radius:50%}.fab-zalo-icon{width:30px;height:30px;background:transparent}}@media(prefers-reduced-motion:reduce){.fab-zalo{animation:none}}#cong-dong{background:linear-gradient(180deg,var(--surface) 0%,#EEF2FF 100%);position:relative;overflow:hidden}#cong-dong:before{content:"";position:absolute;inset:0;background:radial-gradient(600px circle at 10% 10%,rgba(0,104,255,.06),transparent 60%),radial-gradient(500px circle at 90% 90%,rgba(43,79,158,.06),transparent 60%);pointer-events:none}.community-card{max-width:1040px;margin:0 auto;background:var(--surface);border:1px solid var(--border);border-radius:var(--r-xl);box-shadow:var(--shadow-xl);display:grid;grid-template-columns:1.3fr 1fr;gap:48px;padding:48px;align-items:center;position:relative;z-index:1}@media(max-width:860px){.community-card{grid-template-columns:1fr;padding:36px 24px;gap:32px}}.community-info{display:flex;flex-direction:column}.community-badge{display:inline-flex;align-items:center;gap:8px;background:#0068ff14;color:#0068ff;font-size:13px;font-weight:600;padding:7px 14px;border-radius:999px;width:max-content;margin-bottom:14px}.community-zalo-icon{flex-shrink:0}.community-info h3{font-size:clamp(1.4rem,2.6vw,1.875rem);color:var(--brand-700);margin-bottom:10px;font-weight:800;line-height:1.2}.community-tagline{color:var(--ink-500);font-size:1.025rem;line-height:1.55;margin-bottom:22px}.community-perks{list-style:none;padding:0;margin:0 0 28px;display:flex;flex-direction:column;gap:10px}.community-perks li{display:flex;align-items:flex-start;gap:10px;color:var(--ink-700);font-size:.975rem;line-height:1.5}.community-check{display:inline-grid;place-items:center;width:22px;height:22px;background:#22c55e1f;color:#16a34a;border-radius:50%;font-size:13px;font-weight:700;flex-shrink:0;margin-top:1px}.community-actions{display:flex;flex-direction:column;align-items:flex-start;gap:12px}.btn-zalo{background:#0068ff;color:#fff;display:inline-flex;align-items:center;gap:10px;border:1px solid #0068FF}.btn-zalo:hover{background:#0052cc;border-color:#0052cc;color:#fff;transform:translateY(-2px);box-shadow:0 10px 24px #0068ff47}.community-or{font-size:13px;color:var(--ink-400);font-style:italic}@media(max-width:860px){.community-or{display:none}}.community-qr-wrap{display:flex;flex-direction:column;align-items:center;gap:14px}.community-qr-frame{background:#fff;border:1px solid var(--border);border-radius:var(--r-lg);padding:14px;box-shadow:var(--shadow-md);max-width:280px;width:100%}.community-qr-frame img{display:block;width:100%;height:auto;border-radius:6px}.community-qr-label{text-align:center;font-size:14px;color:var(--ink-500);line-height:1.55}.community-qr-url{display:inline-block;margin-top:6px;font-family:SF Mono,Consolas,monospace;font-size:12px;color:var(--brand-600);background:var(--canvas-2);padding:3px 8px;border-radius:6px}.faq-list{max-width:820px;margin:0 auto}details{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-md);margin-bottom:12px;overflow:hidden;transition:all .25s var(--ease-out)}details:hover{border-color:var(--ink-200)}details[open]{border-color:var(--brand-500);box-shadow:var(--shadow-md)}summary{padding:22px 28px;cursor:pointer;font-weight:600;color:var(--brand-700);list-style:none;display:flex;justify-content:space-between;align-items:center;gap:16px;font-size:1rem}summary::-webkit-details-marker{display:none}summary:after{content:"";flex-shrink:0;width:28px;height:28px;border-radius:50%;background:var(--canvas-2);background-image:linear-gradient(135deg,transparent 45%,var(--brand-600) 45% 55%,transparent 55%),linear-gradient(45deg,transparent 45%,var(--brand-600) 45% 55%,transparent 55%);transition:transform .3s var(--ease-out),background .3s}details[open] summary:after{background:var(--brand-600);background-image:linear-gradient(135deg,transparent 45%,#fff 45% 55%,transparent 55%);transform:rotate(180deg)}details p{padding:0 28px 24px;color:var(--ink-500);line-height:1.7}.cta-final{text-align:center;max-width:720px;margin:0 auto}.cta-final h2{color:#fff;margin-bottom:16px;font-size:clamp(1.85rem,4vw,3rem)}.cta-final p{color:#ffffffc7;font-size:1.15rem;margin-bottom:36px}.site-footer{background:var(--ink-900);color:#ffffffa6;padding:72px 0 32px;font-size:14px;position:relative}.site-footer:before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,rgba(255,255,255,.15),transparent)}.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:48px;margin-bottom:48px}@media(max-width:720px){.footer-grid{grid-template-columns:1fr;gap:36px}}.footer-grid h4{color:#fff;margin-bottom:18px;font-size:13px;text-transform:uppercase;letter-spacing:.08em;font-weight:600}.footer-grid a{display:block;padding:6px 0;color:#fff9;transition:color .15s}.footer-grid a:hover{color:var(--gold-500)}.footer-brand-desc{color:#fff9;margin-bottom:16px;line-height:1.65;max-width:360px}.footer-author{color:#ffffff73;font-size:13px;line-height:1.6}.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding-top:28px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:16px;font-size:13px;color:#ffffff73}.prose{max-width:760px;margin:0 auto;padding:64px 24px 96px}.prose h1{margin-bottom:12px;color:var(--brand-700);font-size:clamp(2rem,4vw,2.75rem)}.prose .meta{color:var(--ink-400);margin-bottom:36px;font-size:14px;padding-bottom:24px;border-bottom:1px solid var(--border)}.prose h2{margin-top:44px;margin-bottom:14px;color:var(--brand-700);font-size:1.5rem}.prose h3{margin-top:24px;margin-bottom:8px;color:var(--brand-700)}.prose p{margin-bottom:16px;color:var(--ink-700);line-height:1.8}.prose ul,.prose ol{margin:0 0 20px 24px}.prose li{margin-bottom:8px;color:var(--ink-700)}.prose table{width:100%;border-collapse:collapse;margin:20px 0;font-size:14px;border-radius:var(--r-sm);overflow:hidden;box-shadow:var(--shadow-xs)}.prose th,.prose td{padding:12px 16px;border-bottom:1px solid var(--border);text-align:left}.prose th{background:var(--canvas-2);font-weight:600;color:var(--brand-700)}.prose tr:last-child td{border-bottom:none}.prose .callout{background:linear-gradient(135deg,#ffc10714,#ffc10705);border-left:4px solid var(--gold-500);padding:24px 28px;border-radius:var(--r-md);margin:24px 0}.prose .callout ul{margin-top:12px;margin-bottom:0}.prose code{background:var(--canvas-2);padding:2px 8px;border-radius:5px;font-family:ui-monospace,SF Mono,Menlo,monospace;font-size:13px;border:1px solid var(--border);color:var(--brand-700)}.prose a{color:var(--brand-600);border-bottom:1px solid currentColor}.prose a:hover{color:var(--brand-500)}@media(max-width:720px){.container,.container-narrow{padding:0 20px}.hero{padding-top:clamp(48px,8vw,80px)}.hero h1{font-size:clamp(2.1rem,8.5vw,2.85rem)}.hero h1 br{display:none}.hero-sub{font-size:1rem;margin-bottom:28px}.hero-cta{flex-direction:column;align-items:stretch;gap:12px}.hero-cta .btn{width:100%;justify-content:center;padding:16px 24px}.hero-trust{font-size:13px;gap:14px 22px}.mock-browser{transform:none!important;box-shadow:var(--shadow-lg)}.mock-browser:hover{transform:none!important}.mock-content{grid-template-columns:1fr;min-height:auto}.mock-sidebar{order:-1;padding:14px 14px 16px}.mock-left{padding:14px}.mock-left-title{font-size:11px;margin-bottom:10px}.mock-row{font-size:11.5px;padding:7px 0}.mock-browser-bar{padding:10px 12px}.mock-url{font-size:10px;padding:3px 10px}.stats-grid{gap:36px 16px}.stat-value{font-size:1.85rem}.problem-card,.feature{padding:26px 22px}.step{padding:36px 22px 26px}.step:before{width:44px;height:44px;font-size:18px;top:-22px;left:22px}.video-featured .video-meta{padding:28px 22px}.video-featured .video-meta h3{font-size:1.25rem}.video-featured .video-meta .btn{width:100%;justify-content:center}summary{padding:18px 22px;font-size:.95rem;gap:12px}details p{padding:0 22px 22px;font-size:.95rem}.section-title{margin-bottom:44px}.section-title p{font-size:1rem}.cta-final>div{flex-direction:column;align-items:stretch}.cta-final .btn{width:100%;justify-content:center}.footer-bottom{flex-direction:column;gap:10px}}@media(max-width:480px){.container,.container-narrow{padding:0 16px}.nav{padding:12px 0}.logo{font-size:14px;gap:9px}.logo-mark{width:32px;height:32px;border-radius:9px}.nav-cta{padding:8px 14px!important;font-size:13px!important}.hero{padding-top:36px;padding-bottom:56px}.hero h1{font-size:clamp(1.85rem,9vw,2.3rem);letter-spacing:-.02em}.hero-grid{gap:32px}.stat-value{font-size:1.5rem}.stat-label{font-size:12px}section{padding:56px 0}.video-card .video-meta{padding:14px 16px}.prose{padding:40px 16px 64px}.prose h2{font-size:1.3rem;margin-top:32px}}@media(hover:none){.feature:hover,.problem-card:hover,.step:hover,.video-card:hover,.security-card:hover,.btn-primary:hover,.btn-dark:hover{transform:none}}