/* DVCHEAPSO1 — Public Stylesheet. Modern 4.0 / Premium Tech Store */
:root{
  --primary:#2563EB;--accent:#7C3AED;--bg:#F5F8FF;--navy:#101B45;--cyan:#06B6D4;
  --pink:#EC4899;--green:#22C55E;--orange:#F59E0B;--white:#FFFFFF;--text:#172033;
  --muted:#64748B;--border:#E2E8F0;--radius:16px;--shadow:0 10px 40px rgba(16,27,69,.08);
  --shadow-lg:0 20px 60px rgba(16,27,69,.15);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Be Vietnam Pro',Inter,sans-serif;background:var(--bg);color:var(--text);line-height:1.6;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.muted{color:var(--muted)}
.hidden{display:none!important}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 22px;border-radius:12px;font-weight:600;font-size:14px;cursor:pointer;border:2px solid transparent;transition:all .25s ease;font-family:inherit}
.btn-sm{padding:7px 16px;font-size:13px;border-radius:10px}
.btn-lg{padding:14px 30px;font-size:16px;border-radius:14px}
.btn-block{display:flex;width:100%}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;box-shadow:0 8px 24px rgba(37,99,235,.35)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 32px rgba(37,99,235,.45)}
.btn-outline{background:#fff;color:var(--primary);border-color:var(--primary)}
.btn-outline:hover{background:var(--primary);color:#fff}
.btn-outline-white{background:transparent;color:#fff;border-color:rgba(255,255,255,.6)}
.btn-outline-white:hover{background:#fff;color:var(--primary)}
.btn-white{background:#fff;color:var(--primary)}
.btn-white:hover{transform:translateY(-2px)}
.btn-disabled{background:#cbd5e1;color:#64748B;cursor:not-allowed}

/* Announcement bar */
.announce-bar{background:linear-gradient(90deg,var(--navy),var(--primary),var(--accent));color:#fff;font-size:13px;padding:8px 0}
.announce-inner{display:flex;align-items:center;justify-content:center;gap:8px;text-align:center}
.announce-icon{color:var(--orange)}

/* Header */
.site-header{background:rgba(255,255,255,.85);backdrop-filter:blur(12px);position:sticky;top:0;z-index:100;border-bottom:1px solid var(--border)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:68px;gap:16px}
.logo{font-weight:800;font-size:22px;letter-spacing:-.5px;background:linear-gradient(135deg,var(--primary),var(--accent),var(--pink));-webkit-background-clip:text;-webkit-text-fill-color:transparent;white-space:nowrap}
.logo-img{height:40px;width:auto}
.main-nav{display:flex;align-items:center;gap:6px}
.nav-link{padding:8px 14px;border-radius:10px;font-size:14px;font-weight:500;color:var(--text);transition:all .2s}
.nav-link:hover,.nav-link.active{background:rgba(37,99,235,.08);color:var(--primary)}
.nav-cta{margin-left:8px}
.menu-toggle{display:none;background:none;border:none;font-size:24px;cursor:pointer;color:var(--navy)}

/* Hero */
.hero{position:relative;overflow:hidden;padding:70px 0 90px;background:linear-gradient(135deg,#EEF2FF 0%,#F0F9FF 50%,#FDF4FF 100%)}
.hero-bg-shape{position:absolute;border-radius:50%;filter:blur(60px);opacity:.5;pointer-events:none}
.shape-1{width:400px;height:400px;background:var(--cyan);top:-100px;right:-100px}
.shape-2{width:350px;height:350px;background:var(--pink);bottom:-120px;left:-80px;opacity:.3}
.shape-3{width:250px;height:250px;background:var(--accent);top:40%;left:40%;opacity:.15}
.hero-grid{display:grid;grid-template-columns:1.1fr 1fr;gap:50px;align-items:center;position:relative;z-index:2}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:#fff;padding:6px 14px;border-radius:999px;font-size:13px;font-weight:600;color:var(--primary);box-shadow:var(--shadow);margin-bottom:20px}
.hero-badge .dot{width:8px;height:8px;border-radius:50%;background:var(--green);animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}
.hero-title{font-size:clamp(32px,5vw,52px);font-weight:800;line-height:1.15;letter-spacing:-1px;color:var(--navy);margin-bottom:12px}
.hero-slogan{font-size:20px;font-weight:700;background:linear-gradient(90deg,var(--primary),var(--accent),var(--pink));-webkit-background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:16px}
.hero-desc{font-size:16px;color:var(--muted);margin-bottom:28px;max-width:520px}
.hero-ctas{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:36px}
.hero-mini-stats{display:flex;gap:32px}
.hero-mini-stats>div{display:flex;flex-direction:column}
.hero-mini-stats strong{font-size:24px;font-weight:800;color:var(--navy)}
.hero-mini-stats span{font-size:13px;color:var(--muted)}

/* Hero visual - laptop mock */
.hero-visual{position:relative;min-height:380px}
.laptop-mock{position:relative;z-index:2}
.laptop-screen{background:#fff;border-radius:16px 16px 4px 4px;box-shadow:var(--shadow-lg);padding:14px;border:1px solid var(--border)}
.mock-bar{display:flex;gap:6px;margin-bottom:12px}
.mock-bar span{width:10px;height:10px;border-radius:50%;background:#ddd}
.mock-bar span:first-child{background:#EF4444}.mock-bar span:nth-child(2){background:var(--orange)}.mock-bar span:nth-child(3){background:var(--green)}
.mock-row{height:10px;background:linear-gradient(90deg,#E2E8F0,#F1F5F9);border-radius:6px;margin-bottom:8px}
.mock-title{width:60%;height:16px;background:linear-gradient(90deg,var(--primary),var(--accent));opacity:.7}
.mock-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:14px}
.mock-card{background:#F8FAFC;border:1px solid var(--border);border-radius:10px;padding:10px}
.mc-icon{width:28px;height:28px;border-radius:8px;color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:13px;margin-bottom:8px}
.mc-line{height:6px;background:#E2E8F0;border-radius:4px;margin-bottom:5px}
.mc-line.short{width:60%}
.laptop-base{height:10px;background:linear-gradient(180deg,#CBD5E1,#94A3B8);border-radius:0 0 16px 16px;margin:0 -20px}
.float-card{position:absolute;background:rgba(255,255,255,.95);backdrop-filter:blur(10px);border-radius:14px;padding:12px 16px;display:flex;align-items:center;gap:10px;box-shadow:var(--shadow-lg);z-index:3;animation:float 4s ease-in-out infinite}
.float-card strong{display:block;font-size:14px;color:var(--navy)}
.float-card small{font-size:11px;color:var(--muted)}
.fc-icon{width:36px;height:36px;border-radius:10px;color:#fff;display:flex;align-items:center;justify-content:center;font-size:16px;flex-shrink:0}
.fc-1{top:-20px;right:-10px;animation-delay:0s}
.fc-2{bottom:40px;left:-30px;animation-delay:1s}
.fc-3{bottom:-20px;right:20px;animation-delay:2s}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}

/* Sections */
.section{padding:64px 0}
.section-alt{background:#fff}
.section-head{text-align:center;margin-bottom:40px}
.section-head h2{font-size:clamp(26px,3.5vw,36px);font-weight:800;color:var(--navy);margin-bottom:8px;letter-spacing:-.5px}
.section-head p{color:var(--muted);font-size:16px}
.grad-text{background:linear-gradient(135deg,var(--primary),var(--accent),var(--pink));-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.page-hero{background:linear-gradient(135deg,var(--navy),var(--primary));color:#fff;padding:50px 0 40px}
.page-hero h1{font-size:clamp(26px,4vw,38px);font-weight:800;margin-bottom:8px}
.page-hero p{opacity:.85}

/* Category cards */
.cat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:20px}
.cat-card{background:#fff;border-radius:var(--radius);padding:28px;box-shadow:var(--shadow);border:1px solid var(--border);transition:all .3s;position:relative;overflow:hidden}
.cat-card::before{content:'';position:absolute;top:0;left:0;right:0;height:4px;background:var(--cc,var(--primary))}
.cat-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.cat-icon{width:52px;height:52px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:24px;margin-bottom:16px}
.cat-card h3{font-size:18px;font-weight:700;margin-bottom:8px;color:var(--navy)}
.cat-card p{font-size:14px;color:var(--muted);margin-bottom:14px;min-height:42px}
.cat-link{font-size:13px;font-weight:600;color:var(--primary)}
.cat-count{display:inline-block;background:rgba(37,99,235,.1);color:var(--primary);padding:3px 10px;border-radius:999px;font-size:12px;font-weight:600;margin-bottom:10px}

/* Site cards */
.site-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:22px}
.site-card{background:#fff;border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);border:1px solid var(--border);transition:all .3s;display:flex;flex-direction:column}
.site-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:var(--primary)}
.site-card-head{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:14px}
.site-logo{width:52px;height:52px;border-radius:14px;overflow:hidden;background:#F1F5F9;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.site-logo img{width:100%;height:100%;object-fit:cover}
.site-logo span{width:100%;height:100%;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:800;font-size:22px}
.site-badges{display:flex;gap:6px;flex-wrap:wrap;justify-content:flex-end}
.badge{display:inline-block;padding:3px 10px;border-radius:999px;font-size:11px;font-weight:600;background:#F1F5F9;color:var(--muted)}
.badge-ok{background:#DCFCE7;color:#15803D}
.badge-warn{background:#FEF3C7;color:#B45309}
.badge-featured{background:linear-gradient(135deg,var(--orange),var(--pink));color:#fff}
.site-name{font-size:17px;font-weight:700;color:var(--navy);margin-bottom:6px}
.site-cat{display:inline-block;padding:3px 10px;border-radius:999px;font-size:11px;font-weight:600;margin-bottom:10px}
.site-desc{font-size:13px;color:var(--muted);margin-bottom:14px;flex-grow:1;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.site-meta{display:flex;gap:14px;font-size:12px;color:var(--muted);margin-bottom:14px;padding-top:12px;border-top:1px dashed var(--border);flex-wrap:wrap}
.manual-tag{background:#FEF3C7;color:#B45309;padding:1px 6px;border-radius:4px;font-size:10px}
.manual-tag.light{background:rgba(255,255,255,.25);color:#fff}
.site-card-actions{display:flex;gap:8px}
.site-card-actions .btn{flex:1}

/* Filter bar */
.filter-bar{background:#fff;border-radius:var(--radius);padding:16px;box-shadow:var(--shadow);margin-bottom:24px;border:1px solid var(--border)}
.filter-search{display:flex;gap:10px;flex-wrap:wrap}
.filter-search input[type=text]{flex:1;min-width:200px;padding:10px 16px;border:1px solid var(--border);border-radius:10px;font-size:14px;font-family:inherit}
.filter-row{display:flex;gap:10px;margin-top:12px;flex-wrap:wrap;align-items:center}
.filter-row select,.filter-row input[type=date]{padding:8px 12px;border:1px solid var(--border);border-radius:10px;font-size:13px;font-family:inherit;background:#fff}
.filter-row label{font-size:13px;color:var(--muted);display:flex;align-items:center;gap:6px}
.result-count{margin-bottom:16px;color:var(--muted);font-size:14px}

/* Pagination */
.pagination{display:flex;gap:8px;justify-content:center;margin-top:32px;flex-wrap:wrap}
.page-link{padding:8px 14px;border-radius:10px;background:#fff;border:1px solid var(--border);font-size:14px;font-weight:600;color:var(--text)}
.page-link.active{background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;border-color:transparent}

/* Empty state */
.empty-state{text-align:center;padding:60px 20px;background:#fff;border-radius:var(--radius);box-shadow:var(--shadow)}
.empty-icon{font-size:56px;margin-bottom:16px}
.empty-state h3{font-size:20px;margin-bottom:8px;color:var(--navy)}
.empty-state p{color:var(--muted)}

/* Site detail */
.site-banner{background:linear-gradient(135deg,var(--navy),var(--primary),var(--accent));color:#fff;padding:30px 0 40px}
.breadcrumb{font-size:13px;opacity:.8;margin-bottom:20px;display:flex;gap:6px;flex-wrap:wrap}
.breadcrumb a:hover{text-decoration:underline}
.site-banner-inner{display:flex;align-items:center;gap:24px;flex-wrap:wrap}
.site-banner-logo{width:80px;height:80px;border-radius:20px;background:#fff;overflow:hidden;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.site-banner-logo img{width:100%;height:100%;object-fit:cover}
.site-banner-logo span{font-size:36px;font-weight:800;background:linear-gradient(135deg,var(--primary),var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.site-banner-info{flex:1;min-width:200px}
.site-banner-info h1{font-size:clamp(24px,3vw,34px);font-weight:800;margin-bottom:10px}
.site-banner-meta{display:flex;gap:10px;flex-wrap:wrap;align-items:center;font-size:13px}
.banner-stat{background:rgba(255,255,255,.15);padding:4px 12px;border-radius:999px}
.site-banner-ctas{display:flex;gap:10px;flex-wrap:wrap}
.detail-grid{display:grid;grid-template-columns:1fr 320px;gap:30px;align-items:start}
.detail-block{background:#fff;border-radius:var(--radius);padding:28px;box-shadow:var(--shadow);margin-bottom:24px;border:1px solid var(--border)}
.detail-block h2{font-size:20px;font-weight:700;color:var(--navy);margin-bottom:16px;padding-bottom:12px;border-bottom:2px solid var(--border)}
.short-desc{font-size:16px;color:var(--muted);margin-bottom:16px}
.detail-content{font-size:15px;line-height:1.8}
.detail-content p{margin-bottom:12px}
.feature-list{list-style:none}
.feature-list li{padding:8px 0;display:flex;gap:10px;align-items:flex-start}
.check{width:22px;height:22px;border-radius:50%;background:var(--green);color:#fff;display:inline-flex;align-items:center;justify-content:center;font-size:12px;flex-shrink:0;margin-top:2px}
.note-block{background:#FFFBEB;border-color:#FDE68A}
.detail-side{position:sticky;top:90px}
.side-card{background:#fff;border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);margin-bottom:20px;border:1px solid var(--border)}
.side-card h3{font-size:16px;font-weight:700;margin-bottom:14px;color:var(--navy)}
.side-info{list-style:none;font-size:14px;margin-bottom:16px}
.side-info li{padding:8px 0;border-bottom:1px dashed var(--border);display:flex;justify-content:space-between;gap:10px}
.side-info li span{color:var(--muted);flex-shrink:0}
.side-info li:last-child{border-bottom:none}
.related-item{display:block;padding:10px 0;border-bottom:1px dashed var(--border)}
.related-item:last-child{border-bottom:none}
.related-item strong{display:block;font-size:14px;color:var(--navy)}
.related-item span{font-size:12px;color:var(--muted)}

/* Pricing */
.pricing-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:20px}
.price-card{background:#fff;border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);border:2px solid var(--border);position:relative;transition:all .3s}
.price-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.price-card.popular{border-color:var(--primary);transform:scale(1.03)}
.popular-tag{position:absolute;top:-12px;left:50%;transform:translateX(-50%);background:linear-gradient(135deg,var(--orange),var(--pink));color:#fff;padding:4px 14px;border-radius:999px;font-size:11px;font-weight:700;white-space:nowrap}
.price-site{font-size:12px;color:var(--muted);font-weight:600;text-transform:uppercase;letter-spacing:.5px;margin-bottom:6px}
.price-card h3{font-size:18px;font-weight:700;color:var(--navy);margin-bottom:12px}
.price-value{font-size:30px;font-weight:800;color:var(--primary);margin-bottom:4px}
.price-value small{font-size:14px;font-weight:500;color:var(--muted)}
.price-duration{font-size:12px;color:var(--muted);margin-bottom:12px}
.price-desc{font-size:13px;color:var(--muted);margin-bottom:14px}
.price-features{list-style:none;margin-bottom:18px}
.price-features li{padding:5px 0;font-size:13px;color:var(--text)}

/* Benefits & steps */
.benefit-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:20px}
.benefit-card{background:#fff;border-radius:var(--radius);padding:28px;box-shadow:var(--shadow);text-align:center;border:1px solid var(--border);transition:all .3s}
.benefit-card:hover{transform:translateY(-4px)}
.b-icon{width:56px;height:56px;border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:26px;margin:0 auto 16px}
.benefit-card h3{font-size:18px;font-weight:700;margin-bottom:8px;color:var(--navy)}
.benefit-card p{font-size:14px;color:var(--muted)}
.steps{display:flex;align-items:center;justify-content:center;gap:20px;flex-wrap:wrap}
.step{background:#fff;border-radius:var(--radius);padding:28px;box-shadow:var(--shadow);text-align:center;max-width:260px;flex:1;border:1px solid var(--border)}
.step-num{width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:20px;margin:0 auto 14px}
.step h3{font-size:17px;margin-bottom:8px;color:var(--navy)}
.step p{font-size:13px;color:var(--muted)}
.step-arrow{font-size:24px;color:var(--primary)}

/* Stats band */
.stats-band{background:linear-gradient(135deg,var(--navy),var(--primary),var(--accent));color:#fff;padding:48px 0}
.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:24px;text-align:center}
.stat-item strong{display:block;font-size:clamp(28px,4vw,40px);font-weight:800}
.stat-item span{font-size:14px;opacity:.85}

/* Reviews */
.review-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px}
.review-card{background:#fff;border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);border:1px solid var(--border)}
.review-stars{color:var(--orange);margin-bottom:10px;letter-spacing:2px}
.review-text{font-size:14px;color:var(--text);margin-bottom:14px;font-style:italic}
.review-author strong{display:block;font-size:14px;color:var(--navy)}
.review-author span{font-size:12px;color:var(--muted)}
.review-item{padding:14px 0;border-bottom:1px dashed var(--border)}
.review-item:last-child{border-bottom:none}
.review-item p{font-size:14px;margin:6px 0}

/* Promo & support CTA */
.promo-banner{border-radius:24px;padding:40px;display:flex;align-items:center;justify-content:space-between;gap:24px;color:#fff;flex-wrap:wrap;box-shadow:var(--shadow-lg)}
.promo-banner h2{font-size:28px;font-weight:800;margin-bottom:8px}
.promo-banner p{opacity:.9}
.support-cta{background:#fff;border-radius:var(--radius);padding:40px;box-shadow:var(--shadow);display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;border:1px solid var(--border)}
.support-cta h2{font-size:24px;font-weight:800;color:var(--navy);margin-bottom:6px}
.support-cta p{color:var(--muted)}

/* FAQ */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:#fff;border-radius:12px;margin-bottom:12px;box-shadow:var(--shadow);border:1px solid var(--border);overflow:hidden}
.faq-item summary{padding:18px 22px;font-weight:600;cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;color:var(--navy)}
.faq-item summary::after{content:'+';font-size:20px;color:var(--primary);font-weight:400}
.faq-item[open] summary::after{content:'−'}
.faq-answer{padding:0 22px 18px;font-size:14px;color:var(--muted);line-height:1.7}

/* Articles */
.article-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:22px}
.article-card{background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:all .3s;border:1px solid var(--border);display:flex;flex-direction:column}
.article-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.article-img{height:160px;background-size:cover;background-position:center}
.article-img.placeholder{background:linear-gradient(135deg,var(--primary),var(--accent));display:flex;align-items:center;justify-content:center;color:#fff;font-size:48px;font-weight:800}
.article-body{padding:20px;flex-grow:1;display:flex;flex-direction:column}
.article-date{font-size:12px;color:var(--muted);margin-bottom:8px}
.article-body h3{font-size:17px;font-weight:700;color:var(--navy);margin-bottom:8px}
.article-body p{font-size:13px;color:var(--muted);margin-bottom:14px;flex-grow:1}
.article-read{font-size:13px;font-weight:600;color:var(--primary)}
.article-detail{max-width:800px}
.article-hero-img{width:100%;border-radius:var(--radius);margin-bottom:24px;max-height:400px;object-fit:cover}
.article-meta{color:rgba(255,255,255,.7);font-size:14px}
.article-back{margin-top:30px}

/* Support page */
.support-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:22px;margin-bottom:30px}
.support-card{background:#fff;border-radius:var(--radius);padding:32px;text-align:center;box-shadow:var(--shadow);border-top:4px solid var(--primary);transition:all .3s}
.support-card.ch-zalo{border-top-color:#0068FF}
.support-card.ch-telegram{border-top-color:#229ED9}
.support-card.ch-gmail{border-top-color:#EA4335}
.support-icon{width:64px;height:64px;border-radius:18px;color:#fff;display:flex;align-items:center;justify-content:center;font-size:28px;font-weight:800;margin:0 auto 16px}
.ch-zalo .support-icon{background:linear-gradient(135deg,#0068FF,#00C2FF)}
.ch-telegram .support-icon{background:linear-gradient(135deg,#229ED9,#37BBFE)}
.ch-gmail .support-icon{background:linear-gradient(135deg,#EA4335,#FBBC05)}
.support-card h3{font-size:20px;font-weight:700;margin-bottom:8px;color:var(--navy)}
.support-card p{font-size:14px;color:var(--muted);margin-bottom:18px}
.gmail-actions{display:flex;flex-direction:column;gap:8px}
.support-note{background:#fff;border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);text-align:center}
.support-note h3{margin-bottom:8px;color:var(--navy)}
.support-note p{color:var(--muted);font-size:14px}

/* Footer */
.site-footer{background:var(--navy);color:#CBD5E1;padding:50px 0 0;margin-top:40px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:30px;padding-bottom:30px}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:14px}
.footer-col a{display:block;padding:5px 0;font-size:14px;color:#94A3B8;transition:color .2s}
.footer-col a:hover{color:#fff}
.logo-footer{font-size:24px;margin-bottom:12px}
.footer-about{font-size:14px;margin-bottom:10px}
.footer-slogan{color:var(--cyan);font-weight:600;font-size:14px}
.footer-channels{display:flex;flex-direction:column;gap:8px}
.footer-channel{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:10px;background:rgba(255,255,255,.08);font-size:13px;color:#fff;width:fit-content}
.ch-icon{width:24px;height:24px;border-radius:6px;display:inline-flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:12px;flex-shrink:0}
.ch-zalo .ch-icon{background:#0068FF}.ch-telegram .ch-icon{background:#229ED9}.ch-gmail .ch-icon{background:#EA4335}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:18px 0;font-size:13px;text-align:center;color:#94A3B8}
.pad{padding:12px}

/* Floating support */
.float-support{position:fixed;bottom:24px;right:24px;z-index:999}
.float-btn{width:60px;height:60px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;border:none;cursor:pointer;font-size:26px;box-shadow:0 10px 30px rgba(37,99,235,.5);animation:pulse-ring 2s infinite;display:flex;align-items:center;justify-content:center}
@keyframes pulse-ring{0%{box-shadow:0 0 0 0 rgba(37,99,235,.5)}70%{box-shadow:0 0 0 16px rgba(37,99,235,0)}100%{box-shadow:0 0 0 0 rgba(37,99,235,0)}}
.float-panel{position:absolute;bottom:76px;right:0;width:280px;background:#fff;border-radius:16px;box-shadow:var(--shadow-lg);padding:14px;display:none;border:1px solid var(--border)}
.float-panel.open{display:block;animation:slideUp .3s ease}
@keyframes slideUp{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}
.float-panel-head{font-weight:700;color:var(--navy);padding:6px 8px 12px;border-bottom:1px solid var(--border);margin-bottom:8px}
.float-channel{display:flex;align-items:center;gap:10px;padding:10px;border-radius:10px;transition:background .2s;margin-bottom:6px;position:relative}
.float-channel:hover{background:#F8FAFC}
.float-ch-info{flex:1;min-width:0}
.float-ch-info strong{display:block;font-size:14px;color:var(--navy)}
.float-ch-info small{font-size:11px;color:var(--muted);display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.copy-btn{background:var(--primary);color:#fff;border:none;padding:4px 8px;border-radius:6px;font-size:11px;cursor:pointer;font-family:inherit}

/* Back to top */
.back-to-top{position:fixed;bottom:24px;left:24px;width:44px;height:44px;border-radius:12px;background:#fff;border:1px solid var(--border);box-shadow:var(--shadow);cursor:pointer;font-size:18px;color:var(--primary);display:none;z-index:998}
.back-to-top.show{display:block}

/* Responsive */
@media (max-width:900px){
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-right{order:2}
  .detail-grid{grid-template-columns:1fr}
  .detail-side{position:static}
  .footer-grid{grid-template-columns:1fr 1fr}
  .main-nav{position:fixed;top:68px;left:0;right:0;background:#fff;flex-direction:column;padding:16px;gap:4px;box-shadow:var(--shadow-lg);display:none;z-index:99}
  .main-nav.open{display:flex}
  .nav-link{width:100%;padding:12px 16px}
  .menu-toggle{display:block}
  .nav-cta{margin:8px 0 0;width:100%}
  .promo-banner,.support-cta{flex-direction:column;text-align:center}
  .steps{flex-direction:column}
  .step-arrow{transform:rotate(90deg)}
  .float-panel{right:-20px;width:calc(100vw - 60px);max-width:300px}
}
@media (max-width:520px){
  .section{padding:44px 0}
  .hero{padding:40px 0 60px}
  .site-grid,.cat-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .hero-mini-stats{gap:20px}
  .btn-lg{padding:12px 22px;font-size:15px}
  .site-banner-inner{flex-direction:column;align-items:flex-start}
  .back-to-top{left:16px;bottom:90px}
  .float-support{bottom:16px;right:16px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  html{scroll-behavior:auto}
}

/* ===== Dark mode ===== */
[data-theme="dark"]{--bg:#0F172A;--text:#E2E8F0;--white:#1E293B;--border:#334155;--muted:#94A3B8;--navy:#F1F5F9}
[data-theme="dark"] body{background:var(--bg);color:var(--text)}
[data-theme="dark"] .site-header{background:rgba(15,23,42,.85)}
[data-theme="dark"] .hero{background:linear-gradient(135deg,#0F172A,#1E1B4B,#0F172A)}
[data-theme="dark"] .hero-title,[data-theme="dark"] .section-head h2,[data-theme="dark"] .site-name,[data-theme="dark"] .cat-card h3,[data-theme="dark"] .benefit-card h3{color:#F1F5F9}
[data-theme="dark"] .site-card,[data-theme="dark"] .cat-card,[data-theme="dark"] .benefit-card,[data-theme="dark"] .review-card,[data-theme="dark"] .article-card,[data-theme="dark"] .support-card,[data-theme="dark"] .support-cta,[data-theme="dark"] .empty-state,[data-theme="dark"] .filter-bar,[data-theme="dark"] .side-card,[data-theme="dark"] .detail-block,[data-theme="dark"] .price-card,[data-theme="dark"] .faq-item,[data-theme="dark"] .step{background:#1E293B;border-color:#334155;color:#E2E8F0}
[data-theme="dark"] .site-desc,[data-theme="dark"] .cat-card p,[data-theme="dark"] .muted,[data-theme="dark"] .hero-desc{color:#94A3B8}
[data-theme="dark"] .mock-card,[data-theme="dark"] .laptop-screen{background:#0F172A;border-color:#334155}
[data-theme="dark"] .float-card{background:rgba(30,41,59,.95)}
[data-theme="dark"] .nav-link{color:#E2E8F0}
[data-theme="dark"] .btn-outline{background:transparent;color:#93C5FD;border-color:#3B82F6}
[data-theme="dark"] .page-hero{background:linear-gradient(135deg,#0F172A,#1E3A8A)}
[data-theme="dark"] input,[data-theme="dark"] select,[data-theme="dark"] textarea{background:#0F172A;border-color:#334155;color:#E2E8F0}
[data-theme="dark"] .site-banner{background:linear-gradient(135deg,#0F172A,#1E3A8A,#4C1D95)}
[data-theme="dark"] .section-alt{background:#1A2332}
.theme-toggle{background:none;border:none;font-size:20px;cursor:pointer;padding:6px;border-radius:10px;transition:transform .2s}
.theme-toggle:hover{transform:rotate(20deg) scale(1.1)}
/* ===== Scroll reveal ===== */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .6s ease,transform .6s ease}
.reveal.revealed{opacity:1;transform:translateY(0)}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none}}
/* ===== Recently viewed ===== */
.recent-strip{display:flex;gap:12px;overflow-x:auto;padding:10px 0}
.recent-chip{background:#fff;border:1px solid var(--border);border-radius:12px;padding:10px 16px;white-space:nowrap;font-size:13px;font-weight:600;box-shadow:var(--shadow);flex-shrink:0}
[data-theme="dark"] .recent-chip{background:#1E293B;border-color:#334155}
/* ===== Quick actions (admin) ===== */
.quick-actions{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:20px}
.qa-btn{padding:9px 16px;border-radius:10px;background:#fff;border:1px solid var(--border);font-size:13px;font-weight:600;color:var(--text);box-shadow:0 2px 8px rgba(0,0,0,.05);transition:all .2s;text-decoration:none;display:inline-flex;align-items:center;gap:6px}
.qa-btn:hover{transform:translateY(-2px);box-shadow:0 6px 16px rgba(0,0,0,.1);border-color:var(--primary);color:var(--primary)}
.qa-accent{background:linear-gradient(135deg,#22C55E,#06B6D4);color:#fff;border-color:transparent}