/* ══════════════════════════════════════════════════════════════
   MICROADS BLOG — stylesheet dùng chung
   Đồng bộ với giao diện trang chủ 2026 "Dòng chảy dữ liệu"
   Tối ưu tốc độ: không icon-font ngoài, không JS chặn nội dung.
══════════════════════════════════════════════════════════════ */
:root{
  --bg:#04070f;
  --bg-2:#070d1c;
  --panel:rgba(10,17,34,.58);
  --panel-2:rgba(13,21,42,.72);
  --line:rgba(142,172,255,.14);
  --line-2:rgba(142,172,255,.26);
  --ink:#eaf2ff;
  --mute:#93a2c4;
  --dim:#5b6a8c;
  --cyan:#4fd9ff;
  --violet:#8f7bff;
  --magenta:#ff5fa8;
  --amber:#ffb65c;
  --grad:linear-gradient(94deg,var(--cyan) 0%,var(--violet) 52%,var(--magenta) 100%);
  --f-body:'Be Vietnam Pro',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
  --f-tech:'Chakra Petch','Be Vietnam Pro',sans-serif;
  --f-mono:'JetBrains Mono',ui-monospace,'SF Mono',Consolas,monospace;
  --r:18px;--rlg:24px;--rsm:10px;
  --ease:cubic-bezier(.22,.8,.24,1);
  --tr:all .3s var(--ease);
  --nav-h:74px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px;-webkit-text-size-adjust:100%}
body{font-family:var(--f-body);background:var(--bg);color:var(--ink);line-height:1.7;overflow-x:hidden;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
a{text-decoration:none;color:inherit}
img,svg{max-width:100%;display:block}
ul{list-style:none}
button{font-family:inherit;cursor:pointer;background:none;border:0;color:inherit}
input{font-family:inherit}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:4px}
::selection{background:rgba(79,217,255,.28);color:#fff}
::-webkit-scrollbar{width:10px}
::-webkit-scrollbar-track{background:var(--bg)}
::-webkit-scrollbar-thumb{background:#1a2745;border-radius:8px;border:2px solid var(--bg)}

.container{max-width:1200px;margin:0 auto;padding:0 1.5rem}
.container-narrow{max-width:820px;margin:0 auto;padding:0 1.5rem}
.tg,.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent}
.mono{font-family:var(--f-mono)}
.svg-ic{width:1em;height:1em;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;flex:none;vertical-align:-.125em}
.svg-ic.f{stroke:none;fill:currentColor}

/* ── Nút ─────────────────────────────────── */
.btn{position:relative;display:inline-flex;align-items:center;gap:.55rem;padding:.85rem 1.7rem;border-radius:999px;font-weight:700;font-size:.95rem;letter-spacing:.01em;transition:transform .35s var(--ease),box-shadow .35s var(--ease),border-color .35s,background .35s;white-space:nowrap;line-height:1}
.btn .svg-ic{font-size:1.05em}
.btn-p,.btn-pri{color:#031018;background:var(--grad);box-shadow:0 8px 30px -10px rgba(79,217,255,.5)}
.btn-p:hover,.btn-pri:hover{transform:translateY(-3px);box-shadow:0 16px 40px -12px rgba(79,217,255,.6)}
.btn-o,.btn-ghost{color:var(--ink);border:1px solid var(--line-2);background:linear-gradient(rgba(12,20,40,.5),rgba(12,20,40,.5));backdrop-filter:blur(8px)}
.btn-o:hover,.btn-ghost:hover{transform:translateY(-3px);border-color:rgba(79,217,255,.55);color:#fff}
.btn-sm{padding:.62rem 1.25rem;font-size:.85rem}

/* ══════════ NAV (đồng bộ trang chủ) ══════════ */
.nav{position:fixed;top:0;left:0;right:0;z-index:1000;height:var(--nav-h);display:flex;align-items:center;transition:background .4s var(--ease),border-color .4s,backdrop-filter .4s;border-bottom:1px solid transparent}
.nav.scrolled{background:rgba(4,8,16,.72);backdrop-filter:blur(16px) saturate(1.4);border-color:var(--line)}
.nav .container{display:flex;align-items:center;gap:1.5rem;width:100%}
.logo{display:flex;align-items:center;gap:.7rem;font-family:var(--f-tech);font-weight:700;font-size:1.2rem;letter-spacing:.05em}
.logo-mark{width:38px;height:38px;flex:none}
.logo-text,.logo .txt b{color:var(--ink)}
.logo-text em,.logo .txt span{background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent;font-style:normal}
.nav-links{display:flex;align-items:center;gap:.15rem;margin-left:auto}
.nav-links a{position:relative;color:var(--mute);font-size:.9rem;font-weight:500;padding:.55rem .9rem;border-radius:10px;transition:color .3s}
.nav-links a::after{content:"";position:absolute;left:.9rem;right:.9rem;bottom:.35rem;height:2px;border-radius:2px;background:var(--grad);transform:scaleX(0);transform-origin:left;transition:transform .35s var(--ease)}
.nav-links a:hover,.nav-links a.active{color:var(--ink)}
.nav-links a.active::after{transform:scaleX(1)}
.nav-cta{display:flex;align-items:center;gap:.9rem;margin-left:auto}
.nav-tel{display:inline-flex;align-items:center;gap:.5rem;font-family:var(--f-mono);font-size:.85rem;color:var(--mute);transition:color .3s}
.nav-tel:hover{color:var(--cyan)}
.nav-tel .dot{width:7px;height:7px;border-radius:50%;background:#37e28b;box-shadow:0 0 10px #37e28b;flex:none}
.hamburger{display:none;width:44px;height:44px;border:1px solid var(--line-2);border-radius:10px;color:var(--ink);align-items:center;justify-content:center;font-size:1.1rem;transition:var(--tr)}
.hamburger:hover{border-color:var(--cyan);color:var(--cyan)}
.mob{display:none;position:fixed;inset:0;z-index:1100;background:rgba(3,6,13,.94);backdrop-filter:blur(22px);flex-direction:column;align-items:center;justify-content:center;gap:1.5rem}
.mob.open{display:flex}
.mob-close{position:absolute;top:1.4rem;right:1.4rem;width:44px;height:44px;border:1px solid var(--line-2);border-radius:10px;color:var(--ink);display:flex;align-items:center;justify-content:center;font-size:1.2rem}
.mob a{font-family:var(--f-tech);font-weight:600;font-size:1.5rem;color:var(--ink)}
.mob a:hover{color:var(--cyan)}
.mob .btn{font-size:1rem}

/* ══════════ HERO trang blog / chuyên mục ══════════ */
.blog-hero{position:relative;padding:calc(var(--nav-h) + 3.5rem) 0 3rem;overflow:hidden}
.blog-hero .orb{position:absolute;border-radius:50%;filter:blur(90px);pointer-events:none;mix-blend-mode:screen}
.orb-a{width:520px;height:520px;background:rgba(79,217,255,.14);top:-260px;left:-160px}
.orb-b{width:440px;height:440px;background:rgba(143,123,255,.16);top:-180px;right:-120px}
.bg-grid{position:absolute;inset:0;background-image:linear-gradient(rgba(142,172,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(142,172,255,.05) 1px,transparent 1px);background-size:52px 52px;mask-image:radial-gradient(ellipse at top,#000 20%,transparent 70%);-webkit-mask-image:radial-gradient(ellipse at top,#000 20%,transparent 70%);pointer-events:none}
.sec-badge{position:relative;z-index:1;display:inline-flex;align-items:center;gap:.5rem;background:rgba(79,217,255,.08);border:1px solid rgba(79,217,255,.24);color:var(--cyan);padding:.4rem 1.1rem;border-radius:999px;font-family:var(--f-tech);font-size:.72rem;font-weight:600;letter-spacing:.16em;text-transform:uppercase;margin-bottom:1.4rem}
.blog-hero h1{position:relative;z-index:1;font-size:clamp(2rem,5vw,3.3rem);font-weight:800;line-height:1.12;letter-spacing:-.03em;max-width:900px;margin-bottom:1.1rem;text-wrap:balance}
.blog-hero p.lead{position:relative;z-index:1;color:var(--mute);font-size:1.08rem;max-width:660px;line-height:1.8;text-wrap:pretty}

/* ── Breadcrumb ── */
.breadcrumb{position:relative;z-index:1;display:flex;flex-wrap:wrap;align-items:center;gap:.5rem;font-size:.8rem;color:var(--mute);margin-bottom:1.4rem}
.breadcrumb a{color:var(--mute);transition:color .3s}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb .sep{color:var(--dim)}
.breadcrumb span[aria-current]{color:var(--ink)}

/* ══════════ BỘ LỌC CHUYÊN MỤC + TÌM KIẾM ══════════ */
.cat-filter{display:flex;flex-wrap:wrap;gap:.6rem;margin:2.5rem 0 1rem}
.cat-chip{display:inline-flex;align-items:center;gap:.45rem;padding:.55rem 1.1rem;border-radius:999px;font-family:var(--f-tech);font-size:.82rem;font-weight:600;letter-spacing:.02em;color:var(--mute);background:var(--panel);border:1px solid var(--line);transition:var(--tr)}
.cat-chip .svg-ic{font-size:1em;color:var(--cyan)}
.cat-chip:hover{color:#fff;border-color:rgba(79,217,255,.4)}
.cat-chip.active{color:#031018;background:var(--grad);border-color:transparent}
.cat-chip.active .svg-ic{color:#031018}
.blog-tools{display:flex;flex-wrap:wrap;gap:1rem;align-items:center;justify-content:space-between;margin-bottom:.5rem}
.search-box{position:relative;flex:1;min-width:240px;max-width:360px}
.search-box .svg-ic{position:absolute;left:1rem;top:50%;transform:translateY(-50%);color:var(--dim);font-size:1rem}
.search-box input{width:100%;background:var(--panel);border:1px solid var(--line);border-radius:999px;padding:.7rem 1rem .7rem 2.7rem;color:#fff;font-size:.9rem;font-family:inherit;transition:var(--tr)}
.search-box input:focus{outline:none;border-color:rgba(79,217,255,.5);background:rgba(79,217,255,.05)}
.result-count{color:var(--dim);font-size:.82rem;font-family:var(--f-mono)}

/* ══════════ LƯỚI THẺ BÀI VIẾT ══════════ */
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.6rem;margin:2rem 0 1rem}
.post-card{display:flex;flex-direction:column;background:var(--panel);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;transition:transform .5s var(--ease),border-color .5s,box-shadow .5s;height:100%;backdrop-filter:blur(10px)}
.post-card:hover{transform:translateY(-5px);border-color:var(--line-2);box-shadow:0 26px 55px -30px rgba(0,0,0,.85),0 0 0 1px rgba(79,217,255,.08)}
.post-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--bg-2);display:block}
.post-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease)}
.post-card:hover .post-thumb img{transform:scale(1.05)}
.post-thumb .cat-tag{position:absolute;top:.8rem;left:.8rem;z-index:2;display:inline-flex;align-items:center;gap:.35rem;padding:.34rem .8rem;border-radius:999px;font-family:var(--f-tech);font-size:.7rem;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:#fff;background:rgba(4,7,15,.72);backdrop-filter:blur(6px);border:1px solid rgba(142,172,255,.2)}
.post-thumb .cat-tag .svg-ic{color:var(--cyan);font-size:.9em}
.post-body{display:flex;flex-direction:column;flex:1;padding:1.4rem}
.post-meta{display:flex;align-items:center;flex-wrap:wrap;gap:.9rem;font-family:var(--f-mono);font-size:.74rem;color:var(--dim);margin-bottom:.7rem}
.post-meta span{display:inline-flex;align-items:center;gap:.35rem}
.post-meta .svg-ic{color:var(--dim);font-size:.95em}
.post-card h2,.post-card h3{font-size:1.08rem;font-weight:700;line-height:1.42;margin-bottom:.6rem;letter-spacing:-.01em}
.post-card h2 a,.post-card h3 a{background-image:linear-gradient(var(--cyan),var(--cyan));background-size:0 1px;background-position:0 100%;background-repeat:no-repeat;transition:background-size .45s var(--ease),color .3s}
.post-card:hover h2 a,.post-card:hover h3 a{background-size:100% 1px}
.post-excerpt{color:var(--mute);font-size:.9rem;line-height:1.65;flex:1;margin-bottom:1rem}
.post-more{display:inline-flex;align-items:center;gap:.4rem;color:var(--cyan);font-size:.85rem;font-weight:600;align-self:flex-start}
.post-more .svg-ic{transition:transform .3s ease}
.post-card:hover .post-more .svg-ic{transform:translateX(4px)}
.no-result{text-align:center;color:var(--mute);padding:3rem 0;display:none}
.load-more-wrap{text-align:center;margin:2.5rem 0}

/* ── Bài nổi bật ── */
.featured{display:grid;grid-template-columns:1.15fr 1fr;gap:0;background:var(--panel);border:1px solid var(--line);border-radius:var(--rlg);overflow:hidden;margin:2.5rem 0;transition:border-color .5s,box-shadow .5s;backdrop-filter:blur(10px)}
.featured:hover{border-color:var(--line-2);box-shadow:0 30px 60px -30px rgba(0,0,0,.85)}
.featured .f-thumb{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--bg-2)}
.featured .f-thumb img{width:100%;height:100%;object-fit:cover}
.featured .f-body{padding:2.4rem;display:flex;flex-direction:column;justify-content:center}
.featured .f-tag{display:inline-flex;align-items:center;gap:.4rem;color:var(--cyan);font-family:var(--f-tech);font-size:.72rem;font-weight:600;text-transform:uppercase;letter-spacing:.14em;margin-bottom:1rem}
.featured h2{font-size:clamp(1.4rem,2.6vw,2rem);font-weight:800;line-height:1.24;margin-bottom:1rem;letter-spacing:-.02em}
.featured p{color:var(--mute);font-size:1rem;line-height:1.7;margin-bottom:1.4rem}
.featured .post-meta{margin-bottom:1.2rem;font-size:.78rem}

/* ══════════ TRANG BÀI VIẾT ══════════ */
.article-wrap{padding:calc(var(--nav-h) + 2.5rem) 0 4rem;position:relative}
.article-head{max-width:820px;margin:0 auto 2rem}
.article-cat{display:inline-flex;align-items:center;gap:.45rem;color:var(--cyan);font-family:var(--f-tech);font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.12em;margin-bottom:1rem}
.article-head h1{font-size:clamp(1.85rem,4.2vw,2.85rem);font-weight:800;line-height:1.16;letter-spacing:-.025em;margin-bottom:1.25rem;text-wrap:balance}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:1.25rem;color:var(--mute);font-size:.85rem;padding-bottom:.5rem}
.article-meta .am{display:inline-flex;align-items:center;gap:.45rem}
.article-meta .svg-ic{color:var(--cyan)}
.article-meta time{font-family:var(--f-mono)}
.article-avatar{width:34px;height:34px;border-radius:50%;background:var(--grad);display:inline-flex;align-items:center;justify-content:center;font-family:var(--f-tech);font-weight:700;font-size:.85rem;color:#031018}
.article-hero{max-width:980px;margin:0 auto 2.5rem;border-radius:var(--rlg);overflow:hidden;aspect-ratio:16/8;background:var(--bg-2);border:1px solid var(--line)}
.article-hero img{width:100%;height:100%;object-fit:cover}

.article-layout{max-width:820px;margin:0 auto}
.toc{background:var(--panel);border:1px solid var(--line);border-left:3px solid var(--cyan);border-radius:var(--rsm);padding:1.3rem 1.6rem;margin-bottom:2.5rem}
.toc-title{display:flex;align-items:center;gap:.5rem;font-family:var(--f-tech);font-size:.78rem;font-weight:600;text-transform:uppercase;letter-spacing:.12em;color:var(--mute);margin-bottom:.9rem}
.toc-title .svg-ic{color:var(--cyan)}
.toc ol{list-style:none;counter-reset:toc;display:flex;flex-direction:column;gap:.55rem}
.toc ol li{counter-increment:toc;position:relative;padding-left:2rem}
.toc ol li::before{content:counter(toc,decimal-leading-zero);position:absolute;left:0;top:.1rem;color:var(--cyan);font-family:var(--f-mono);font-size:.76rem;font-weight:700;font-variant-numeric:tabular-nums}
.toc ol li a{color:var(--mute);font-size:.92rem;transition:color .3s}
.toc ol li a:hover{color:var(--cyan)}

.article-body{font-size:1.08rem;line-height:1.85;color:#cdd8ec}
.article-body>*+*{margin-top:1.25rem}
.article-body h2{font-family:var(--f-body);font-size:clamp(1.35rem,2.6vw,1.75rem);font-weight:800;line-height:1.3;color:#fff;margin:2.6rem 0 1rem;padding-top:.5rem;scroll-margin-top:100px;letter-spacing:-.02em}
.article-body h3{font-size:clamp(1.12rem,2vw,1.3rem);font-weight:700;line-height:1.35;color:var(--ink);margin:1.9rem 0 .8rem;scroll-margin-top:100px}
.article-body h2+p,.article-body h3+p{margin-top:0}
.article-body p{margin-bottom:0}
.article-body strong{color:#fff;font-weight:700}
.article-body em{color:#dfe8f7}
.article-body a{color:var(--cyan);border-bottom:1px solid rgba(79,217,255,.35)}
.article-body a:hover{border-color:var(--cyan)}
.article-body ul,.article-body ol{padding-left:1.4rem;display:flex;flex-direction:column;gap:.55rem}
.article-body ul li{list-style:none;position:relative;padding-left:1.3rem}
.article-body ul li::before{content:"";position:absolute;left:0;top:.68em;width:7px;height:7px;border-radius:2px;background:var(--grad)}
.article-body ol li{list-style:decimal;padding-left:.3rem}
.article-body ol li::marker{color:var(--cyan);font-family:var(--f-mono);font-weight:700}
.article-body blockquote{border-left:3px solid var(--cyan);background:rgba(79,217,255,.06);padding:1rem 1.3rem;border-radius:0 var(--rsm) var(--rsm) 0;color:var(--ink);font-style:italic}
.article-body blockquote p{margin:0}

/* Tag chips */
.article-tags{display:flex;flex-wrap:wrap;gap:.55rem;margin:2.5rem 0}
.tag-chip{display:inline-flex;align-items:center;gap:.35rem;padding:.4rem .9rem;border-radius:999px;font-family:var(--f-mono);font-size:.76rem;color:var(--mute);background:var(--panel);border:1px solid var(--line)}
.tag-chip .svg-ic{color:var(--dim);font-size:.85em}

/* CTA box */
.cta-box{position:relative;overflow:hidden;background:linear-gradient(135deg,rgba(79,217,255,.1),rgba(255,95,168,.08));border:1px solid rgba(79,217,255,.22);border-radius:var(--rlg);padding:2.5rem;margin:3rem 0;text-align:center}
.cta-box h3{font-size:1.4rem;font-weight:800;margin-bottom:.7rem;letter-spacing:-.02em}
.cta-box p{color:var(--mute);max-width:540px;margin:0 auto 1.5rem;line-height:1.7}
.cta-actions{display:flex;gap:.8rem;justify-content:center;flex-wrap:wrap}

/* Author box */
.author-box{display:flex;gap:1.25rem;align-items:flex-start;background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:1.6rem;margin:2.5rem 0}
.author-box .a-ava{width:56px;height:56px;border-radius:14px;flex-shrink:0;background:var(--grad);display:flex;align-items:center;justify-content:center;font-family:var(--f-tech);font-weight:700;color:#031018;font-size:1.3rem}
.author-box .a-name{font-weight:700;margin-bottom:.25rem}
.author-box .a-name em{color:var(--cyan);font-style:normal}
.author-box .a-desc{color:var(--mute);font-size:.9rem;line-height:1.65}

/* Prev / Next */
.prevnext{display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin:2.5rem 0}
.pn-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:1.25rem 1.4rem;transition:var(--tr)}
.pn-card:hover{border-color:var(--line-2);background:rgba(79,217,255,.05)}
.pn-card .pn-label{font-family:var(--f-tech);font-size:.7rem;text-transform:uppercase;letter-spacing:.12em;color:var(--dim);margin-bottom:.4rem;display:flex;align-items:center;gap:.4rem}
.pn-card .pn-title{font-size:.95rem;font-weight:600;line-height:1.4;color:var(--ink)}
.pn-card.next{text-align:right}
.pn-card.next .pn-label{justify-content:flex-end}

/* Related */
.related{margin-top:3.5rem}
.related h2.rel-title{font-size:1.5rem;font-weight:800;margin-bottom:1.5rem;letter-spacing:-.02em}

/* ══════════ FOOTER (đồng bộ trang chủ) ══════════ */
.footer{border-top:1px solid var(--line);padding:4rem 0 2rem;margin-top:2rem;background:linear-gradient(rgba(4,7,15,.3),rgba(3,5,11,.85))}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.2fr;gap:3rem;margin-bottom:3rem}
.f-brand .logo{margin-bottom:1rem}
.f-brand p{color:var(--mute);font-size:.9rem;line-height:1.7;margin-bottom:1.25rem;max-width:340px}
.ft-status{display:inline-flex;align-items:center;gap:.5rem;font-family:var(--f-mono);font-size:.75rem;color:var(--mute)}
.ft-status i{width:7px;height:7px;border-radius:50%;background:#37e28b;box-shadow:0 0 10px #37e28b}
.socials{display:flex;gap:.6rem;margin-top:1.1rem}
.soc{width:38px;height:38px;border-radius:10px;background:var(--panel);border:1px solid var(--line);display:flex;align-items:center;justify-content:center;color:var(--mute);transition:var(--tr)}
.soc .svg-ic{font-size:1.05rem}
.soc:hover{color:var(--cyan);border-color:rgba(79,217,255,.4);transform:translateY(-2px)}
.f-col h4{font-family:var(--f-tech);font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.16em;color:var(--ink);margin-bottom:1.25rem}
.f-col ul{display:flex;flex-direction:column;gap:.75rem}
.f-col ul li a{color:var(--mute);font-size:.85rem;transition:color .3s,padding-left .3s}
.f-col ul li a:hover{color:var(--cyan);padding-left:4px}
.f-bottom{border-top:1px solid var(--line);padding-top:2rem;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:1rem;font-size:.78rem;color:var(--dim)}
.f-bottom a{color:var(--dim);transition:color .3s}
.f-bottom a:hover{color:var(--cyan)}

/* Back to top */
.to-top{position:fixed;right:1.5rem;bottom:1.5rem;width:46px;height:46px;border-radius:12px;background:var(--grad);color:#031018;display:flex;align-items:center;justify-content:center;opacity:0;pointer-events:none;transition:var(--tr);z-index:900;box-shadow:0 8px 24px rgba(79,217,255,.35)}
.to-top.show{opacity:1;pointer-events:auto}
.to-top:hover{transform:translateY(-3px)}

/* ══════════ RESPONSIVE ══════════ */
@media(max-width:960px){
  .post-grid{grid-template-columns:repeat(2,1fr)}
  .featured{grid-template-columns:1fr}
  .featured .f-thumb{aspect-ratio:16/9}
  .featured .f-body{padding:1.8rem}
}
@media(max-width:820px){
  .nav-links,.nav-cta .btn-o,.nav-cta .btn-ghost,.nav-tel{display:none}
  .hamburger{display:inline-flex;margin-left:auto}
  .nav-cta{margin-left:0}
}
@media(max-width:640px){
  .post-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:2rem}
  .prevnext{grid-template-columns:1fr}
  .cta-box,.featured .f-body{padding:1.6rem}
  .f-bottom{flex-direction:column;text-align:center}
}
@media(max-width:420px){.footer-grid{grid-template-columns:1fr}}

@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001s!important;transition-duration:.001s!important}
}

/* ================================================================
   BẢNG SỐ LIỆU trong bài (bảng giá, so sánh)
   ================================================================ */
.tbl-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;border:1px solid var(--line);border-radius:14px;background:rgba(8,13,27,.55)}
.tbl-wrap table{width:100%;border-collapse:collapse;font-size:.95rem;min-width:520px}
.tbl-wrap thead th{
  text-align:left;font-weight:700;color:#fff;white-space:nowrap;
  padding:.85rem 1rem;background:rgba(79,217,255,.08);
  border-bottom:1px solid var(--line-2);font-size:.88rem;letter-spacing:.01em;
}
.tbl-wrap tbody td{padding:.8rem 1rem;border-bottom:1px solid rgba(142,172,255,.09);color:#cdd8ec;vertical-align:top;line-height:1.6}
.tbl-wrap tbody tr:last-child td{border-bottom:0}
.tbl-wrap tbody tr:nth-child(even){background:rgba(142,172,255,.035)}
.tbl-wrap tbody tr:hover{background:rgba(79,217,255,.06)}
.tbl-wrap td strong{color:#fff}
.tbl-wrap td:first-child{color:var(--ink);font-weight:600}
.article-body .tbl-wrap{margin-top:1.5rem}
@media(max-width:680px){
  .tbl-wrap table{font-size:.88rem;min-width:460px}
  .tbl-wrap thead th,.tbl-wrap tbody td{padding:.65rem .75rem}
}

/* ================================================================
   KHỐI FAQ cuối bài
   ================================================================ */
.faq-box{margin-top:3rem;padding-top:2rem;border-top:1px solid var(--line)}
.faq-box h2{
  font-size:clamp(1.3rem,2.5vw,1.65rem);font-weight:800;color:#fff;
  margin-bottom:1.25rem;letter-spacing:-.02em;scroll-margin-top:100px;
}
.faq-item{
  border:1px solid var(--line);border-radius:14px;background:rgba(8,13,27,.5);
  margin-bottom:.75rem;overflow:hidden;transition:border-color .3s;
}
.faq-item[open]{border-color:rgba(79,217,255,.35);background:rgba(11,19,38,.65)}
.faq-item summary{
  cursor:pointer;list-style:none;padding:1rem 3rem 1rem 1.15rem;position:relative;
  font-weight:700;color:var(--ink);font-size:1rem;line-height:1.5;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"";position:absolute;right:1.15rem;top:1.32rem;width:9px;height:9px;
  border-right:2px solid var(--cyan);border-bottom:2px solid var(--cyan);
  transform:rotate(45deg);transition:transform .3s;
}
.faq-item[open] summary::after{transform:rotate(-135deg);top:1.5rem}
.faq-item summary:hover{color:#fff}
.faq-a{padding:0 1.15rem 1.1rem;color:#c2cfe8;font-size:.97rem;line-height:1.75}
.faq-a p{margin:0}