/* lengocquyen.com — nền trắng, chữ đen, điểm nhấn xanh da trời và vàng.
   Phần gốc lấy từ bản mẫu đã duyệt. */
/* Layout: nền trắng sạch, chữ đen, chân dung lớn ở phần mở đầu; viền và điểm nhấn xanh da trời, chút vàng làm điểm sáng. */
:root{
  --navy:#ffffff; --navy-2:#f0f9ff; --navy-3:#e0f2fe;
  --paper:#ffffff; --white:#ffffff; --soft:#f7fafc; --ink:#0a0a0a; --muted:#52585f; --line:#e5e7eb;
  --on-dark:#0a0a0a; --on-dark-muted:#52585f; --on-dark-line:#e5e7eb;
  --blue:#0284c7; --sky:#38bdf8; --blue-soft:#e0f2fe; --blue-ink:#075985;
  --yellow:#fbbf24; --yellow-soft:#fde68a;
  --sans:"Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",sans-serif;
  --serif:"Noto Serif Display",Georgia,"Times New Roman",serif;
  --wrap:1200px; --r:14px;
  color-scheme:light;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.65;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--blue);outline-offset:3px}
h1,h2,h3,p{margin:0}
h1,h2,h3{text-wrap:balance;letter-spacing:-.025em;line-height:1.08;font-weight:800}
.wrap{max-width:var(--wrap);margin:0 auto;padding-left:max(20px,env(safe-area-inset-left,0px));padding-right:max(20px,env(safe-area-inset-right,0px))}
.serif{font-family:var(--serif);font-style:italic;font-weight:400;letter-spacing:-.01em}
.kicker{font-size:12.5px;font-weight:600;letter-spacing:.16em;text-transform:uppercase;color:var(--blue)}
.kicker::before{content:"";display:inline-block;width:20px;height:3px;border-radius:2px;background:var(--yellow);margin-right:10px;vertical-align:middle}
.hl{background:linear-gradient(transparent 60%,var(--yellow-soft) 60%);padding:0 .08em}

.btn{display:inline-flex;align-items:center;gap:10px;font-weight:600;font-size:15px;padding:15px 26px;border-radius:999px;border:1px solid transparent;cursor:pointer;transition:transform .2s,background .2s,color .2s,border-color .2s;white-space:nowrap}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:#0369a1}
.btn-light{background:#fff;color:var(--ink)}
.btn-outline-dark{border-color:var(--on-dark-line);color:var(--on-dark)}
.btn-outline-dark:hover{border-color:var(--ink);background:var(--ink);color:#fff}
.btn-outline{border-color:var(--ink);color:var(--ink)}
.btn-outline:hover{background:var(--ink);color:#fff}

/* ---------- Header ---------- */
.top{position:sticky;top:0;z-index:30;padding-top:env(safe-area-inset-top,0px);border-bottom:1px solid var(--line);background:rgba(255,255,255,.92);backdrop-filter:saturate(1.4) blur(12px)}
.nav{display:flex;align-items:center;justify-content:space-between;gap:24px;padding-block:16px;color:var(--on-dark);position:relative}
.brand{display:flex;flex-direction:column;line-height:1.1}
.brand b{font-size:17px;font-weight:800;letter-spacing:.14em;text-transform:uppercase}
.brand span{font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--on-dark-muted);margin-top:4px}
.nav ul{display:flex;gap:30px;list-style:none;margin:0;padding:0;font-size:14.5px;font-weight:500;color:var(--on-dark-muted)}
.nav ul a:hover{color:var(--blue)}
.nav .btn{padding:11px 20px;font-size:14px}


/* ---------- Hero ---------- */
.hero{position:relative;background:var(--navy);color:var(--on-dark);overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:
  radial-gradient(45% 60% at 80% 45%,rgba(56,189,248,.18),transparent 65%),
  radial-gradient(30% 40% at 95% 95%,rgba(251,191,36,.14),transparent 70%);pointer-events:none}
.hero::after{content:"";position:absolute;inset:0;background-image:linear-gradient(var(--on-dark-line) 1px,transparent 1px),linear-gradient(90deg,var(--on-dark-line) 1px,transparent 1px);background-size:80px 80px;opacity:.6;mask-image:linear-gradient(180deg,transparent,#000 30%,#000 70%,transparent);pointer-events:none}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:end;padding-top:72px}
.hero-copy{padding-bottom:96px;min-width:0}
.hero .role{display:inline-flex;align-items:center;gap:10px;font-size:13px;font-weight:500;color:var(--ink);border:1px solid #bae6fd;border-radius:99px;padding:7px 14px 7px 8px;background:#fff}
.hero .role i{width:8px;height:8px;border-radius:50%;background:var(--yellow);box-shadow:0 0 0 4px rgba(251,191,36,.25)}
.hero h1{font-size:clamp(48px,7.4vw,104px);margin-top:26px;color:var(--ink)}
.hero h1 .serif{display:block;font-size:.62em;color:var(--blue);margin-top:.12em;font-weight:400}
.hero .lead{font-size:clamp(17px,1.6vw,19.5px);color:var(--on-dark-muted);max-width:54ch;margin-top:26px}
.hero .lead strong{color:var(--ink);font-weight:600}
.hero .cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:38px}
.watch{display:inline-flex;align-items:center;gap:14px;margin-top:34px;font-size:14px;color:var(--on-dark-muted)}
.watch b{display:block;color:var(--ink);font-weight:600}
.play{width:46px;height:46px;border-radius:50%;display:grid;place-items:center;flex:none;background:var(--blue);box-shadow:0 0 0 6px var(--blue-soft)}
.play svg{margin-left:3px}

.portrait-wrap{position:relative;align-self:end;min-width:0}
.portrait{position:relative;aspect-ratio:4/5;max-width:100%;border-radius:240px 240px 0 0;overflow:hidden;background:linear-gradient(180deg,#e0f2fe,#f0f9ff 70%);border:1px solid #bae6fd;border-bottom:0}
.portrait-wrap::before{content:"";position:absolute;width:120px;height:120px;border-radius:50%;background:var(--yellow-soft);right:2%;top:6%;z-index:0}
.portrait{z-index:1}
.portrait svg{position:absolute;inset:auto 0 0;width:100%;height:auto}
.portrait .note{position:absolute;top:44%;left:50%;transform:translate(-50%,-50%);text-align:center;font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--blue-ink);width:70%;z-index:1}
.float{position:absolute;z-index:2;background:#fff;color:var(--ink);border:1px solid var(--line);border-radius:var(--r);padding:14px 18px;box-shadow:0 18px 40px -20px rgba(2,132,199,.45);display:flex;align-items:center;gap:12px}
.float strong{color:var(--blue)}
.float strong{font-size:26px;font-weight:800;letter-spacing:-.03em;line-height:1;font-variant-numeric:tabular-nums}
.float span{font-size:12.5px;color:var(--muted);line-height:1.35}
.float.f1{left:-28px;top:26%}
.float.f2{right:-14px;top:52%}
.float.f3{left:6%;bottom:30px;max-width:250px;padding:16px 18px}
.float.f3 p{font-family:var(--serif);font-style:italic;font-size:15px;line-height:1.4}
@media (max-width:980px){
  .hero-grid{grid-template-columns:1fr;padding-top:48px;gap:24px}
  .hero-copy{padding-bottom:20px}
  .portrait-wrap{max-width:480px;width:100%;margin:0 auto}
  .float.f1{left:0}.float.f2{right:0}
}

/* ---------- Proof strip ---------- */
.proof{background:var(--soft);border-top:1px solid var(--line);color:var(--muted)}
.proof .wrap{display:flex;align-items:center;gap:40px;padding-block:28px;flex-wrap:wrap}
.proof p{font-size:12.5px;letter-spacing:.14em;text-transform:uppercase;flex:none}
.logos{display:flex;flex-wrap:wrap;gap:14px 40px;align-items:center;flex:1}
.logos span{font-weight:700;font-size:15px;letter-spacing:.04em;color:#a1a7b0;white-space:nowrap}

/* ---------- Sections ---------- */
section.block{padding-block:120px}
.sec-head{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:end;margin-bottom:64px}
.sec-head h2{font-size:clamp(34px,4.4vw,58px);margin-top:16px}
.sec-head h2 .serif{color:var(--blue)}
.sec-head p{color:var(--muted);font-size:17px;max-width:52ch}
@media (max-width:860px){section.block{padding-block:80px}.sec-head{grid-template-columns:1fr;gap:18px;margin-bottom:44px}}

/* Stats */
.stats{display:grid;grid-template-columns:repeat(var(--cols,4),1fr);gap:0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--white)}
.stat{padding:40px 32px}
.stat+.stat{border-left:1px solid var(--line)}
.stat strong{display:block;font-size:clamp(44px,5vw,64px);font-weight:800;letter-spacing:-.04em;line-height:1;font-variant-numeric:tabular-nums}
.stat strong em{font-style:normal;color:var(--blue)}
.stat span{display:block;margin-top:12px;color:var(--muted);font-size:15px}
@media (max-width:860px){.stats{grid-template-columns:1fr 1fr}.stat:nth-child(3){border-left:0}.stat:nth-child(n+3){border-top:1px solid var(--line)}.stat{padding:28px 20px}}

/* Expertise */
.expertise{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card{background:var(--white);border:1px solid var(--line);border-radius:var(--r);padding:36px 32px;display:flex;flex-direction:column;gap:16px;min-width:0;transition:transform .25s,box-shadow .25s}
.card:hover{transform:translateY(-4px);box-shadow:0 24px 48px -28px rgba(14,23,38,.35)}
.card .ic{width:52px;height:52px;border-radius:12px;background:var(--blue-soft);display:grid;place-items:center;color:var(--blue);border:1px solid #bae6fd}
.card:hover{border-color:var(--sky)}
.card h3{font-size:24px}
.card p{color:var(--muted);font-size:15.5px}
.card ul{list-style:none;padding:0;margin:6px 0 0;display:grid;gap:10px;font-size:14.5px;font-weight:500}
.card li{display:flex;gap:10px;align-items:flex-start}
.card li::before{content:"";width:18px;height:18px;flex:none;margin-top:2px;border-radius:50%;background:var(--blue-soft) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%233a6bf5' stroke-width='3'%3E%3Cpath d='M6 12l4 4 8-8'/%3E%3C/svg%3E") center/12px no-repeat}
@media (max-width:980px){.expertise{grid-template-columns:1fr}}

/* About / story */
.story{background:var(--soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.story-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:80px;align-items:start}
.story h2{font-size:clamp(34px,4.4vw,56px);margin-top:16px}
.story .intro{font-size:18px;color:var(--muted);margin-top:24px}
.story .sign{margin-top:32px;font-family:var(--serif);font-style:italic;font-size:30px;color:var(--ink)}
.story .sign small{display:block;font-family:var(--sans);font-style:normal;font-size:13px;color:var(--muted);margin-top:4px}
.timeline{list-style:none;margin:0;padding:0;border-left:1px solid var(--line)}
.timeline li{position:relative;padding:0 0 36px 32px}
.timeline li:last-child{padding-bottom:0}
.timeline li::before{content:"";position:absolute;left:-6px;top:6px;width:11px;height:11px;border-radius:50%;background:var(--white);border:2px solid var(--blue)}
.timeline li.now::before{background:var(--yellow);border-color:var(--yellow)}
.timeline .yr{font-size:13px;font-weight:700;letter-spacing:.1em;color:var(--blue);font-variant-numeric:tabular-nums}
.timeline h3{font-size:21px;margin-top:4px;letter-spacing:-.015em}
.timeline p{color:var(--muted);font-size:15px;margin-top:6px}
@media (max-width:980px){.story-grid{grid-template-columns:1fr;gap:56px}}

/* Quote band */
.quote{background:#fff;color:var(--ink);text-align:left;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.quote .wrap{padding-block:110px;display:grid;grid-template-columns:auto 1fr;gap:40px;align-items:start}
.quote .mark{font-family:var(--serif);font-size:160px;line-height:.8;color:var(--blue)}
.quote blockquote{margin:0;font-family:var(--serif);font-style:italic;font-size:clamp(30px,4vw,52px);line-height:1.2;letter-spacing:-.015em;max-width:24ch}
.quote cite{display:block;margin-top:28px;font-style:normal;font-size:14px;letter-spacing:.14em;text-transform:uppercase;color:var(--on-dark-muted)}
@media (max-width:700px){.quote .wrap{grid-template-columns:1fr;gap:0;padding-block:80px}.quote .mark{font-size:110px}}

/* Talks */
.talks{display:grid;gap:0;border-top:1px solid var(--ink)}
.talk{display:grid;grid-template-columns:90px 1.2fr 1fr auto;gap:32px;align-items:center;padding-block:34px;border-bottom:1px solid var(--line);transition:background .2s,padding .25s}
.talk:hover{background:var(--blue-soft);padding-inline:20px}
.talk .no{font-size:15px;font-weight:700;color:var(--blue);font-variant-numeric:tabular-nums}
.talk h3{font-size:clamp(22px,2.4vw,30px)}
.talk p{color:var(--muted);font-size:15px}
.talk .fmt{display:flex;flex-wrap:wrap;gap:8px;justify-content:flex-end}
.chip{font-size:12.5px;font-weight:600;padding:5px 12px;border-radius:99px;background:#fff;border:1px solid #7dd3fc;color:var(--blue-ink);white-space:nowrap}
@media (max-width:980px){.talk{grid-template-columns:1fr;gap:10px}.talk .fmt{justify-content:flex-start}.talk:hover{padding-inline:0}}

/* Programs */
.programs{display:grid;grid-template-columns:1.25fr 1fr 1fr;gap:20px}
.prog{border-radius:var(--r);padding:34px 30px;display:flex;flex-direction:column;gap:14px;background:var(--white);border:1px solid var(--line);min-width:0}
.prog.feature{background:#fff;color:var(--ink);border:2px solid var(--blue);position:relative;overflow:hidden;box-shadow:0 24px 50px -30px rgba(2,132,199,.6)}
.prog.feature::after{content:"";position:absolute;right:-70px;top:-70px;width:180px;height:180px;border-radius:50%;background:var(--yellow-soft)}
.prog .tag{font-size:12px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--blue)}
.prog.feature .tag{color:var(--blue)}
.prog h3{font-size:26px;position:relative;z-index:1}
.prog p{color:var(--muted);font-size:15px;position:relative;z-index:1}
.prog.feature p{color:var(--on-dark-muted)}
.prog .meta{display:flex;flex-wrap:wrap;gap:8px 18px;font-size:13.5px;font-weight:500;color:var(--muted);margin-top:auto;padding-top:18px;border-top:1px solid var(--line)}
.prog.feature .meta{color:var(--on-dark-muted);border-color:var(--on-dark-line)}
.prog .go{font-weight:600;font-size:14.5px;color:var(--blue);display:inline-flex;gap:8px;align-items:center}
.prog.feature .go{color:#fff;background:var(--blue);padding:10px 18px;border-radius:99px;align-self:flex-start}
@media (max-width:980px){.programs{grid-template-columns:1fr}}

/* Testimonials */
.voices{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.voice{background:var(--white);border:1px solid var(--line);border-top:3px solid var(--sky);border-radius:var(--r);padding:32px;display:flex;flex-direction:column;gap:22px;min-width:0}
.stars{color:#f2b33d;letter-spacing:3px;font-size:15px}
.voice blockquote{margin:0;font-size:17px;line-height:1.6}
.who{display:flex;align-items:center;gap:14px;margin-top:auto}
.avatar{width:46px;height:46px;border-radius:50%;background:linear-gradient(135deg,var(--blue),var(--sky));color:#fff;display:grid;place-items:center;font-weight:700;font-size:15px;flex:none}
.who b{display:block;font-size:15px}
.who span{font-size:13px;color:var(--muted)}
@media (max-width:980px){.voices{grid-template-columns:1fr}}

/* Media */
.media{display:grid;grid-template-columns:1.4fr 1fr;gap:20px}
.video{position:relative;border-radius:var(--r);overflow:hidden;background:linear-gradient(135deg,#e0f2fe,#f0f9ff);border:1px solid #bae6fd;color:var(--ink);display:flex;align-items:flex-end;padding:28px;min-height:240px;max-width:100%}
.video.big{aspect-ratio:16/10;min-height:0}
.video::before{content:"";position:absolute;inset:0;background:radial-gradient(40% 50% at 80% 20%,rgba(251,191,36,.25),transparent 70%)}
.video .pbtn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:76px;height:76px;border-radius:50%;background:var(--blue);display:grid;place-items:center;box-shadow:0 0 0 12px rgba(2,132,199,.15)}
.video.small .pbtn{width:54px;height:54px;box-shadow:0 0 0 8px rgba(2,132,199,.15)}
.video .cap{position:relative;z-index:1}
.video .cap span{font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--blue);font-weight:600}
.video .cap h3{font-size:22px;margin-top:6px}
.video.big .cap h3{font-size:30px}
.media .stack{display:grid;gap:20px}
@media (max-width:980px){.media{grid-template-columns:1fr}}

/* Insights */
.posts{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.post{display:flex;flex-direction:column;gap:14px;min-width:0}
.post .cover{aspect-ratio:16/10;max-width:100%;border-radius:var(--r);overflow:hidden;position:relative}
.post .cover div{position:absolute;inset:0;transition:transform .5s}
.post:hover .cover div{transform:scale(1.04)}
.c1{background:linear-gradient(135deg,#0284c7,#38bdf8)}
.c2{background:linear-gradient(135deg,#e0f2fe,#bae6fd)}
.c3{background:linear-gradient(135deg,#fef3c7,#fbbf24)}
.post .cover.dark-text b{color:var(--ink)}
.post .cover b{position:absolute;left:20px;bottom:16px;z-index:1;color:#fff;font-size:12px;letter-spacing:.14em;text-transform:uppercase;font-weight:600}
.post .when{font-size:13px;color:var(--muted)}
.post h3{font-size:22px;letter-spacing:-.02em;line-height:1.25}
.post:hover h3{color:var(--blue)}
@media (max-width:980px){.posts{grid-template-columns:1fr}}

/* CTA */
.cta-band{padding-block:0 120px}
.cta-box{background:linear-gradient(135deg,#f0f9ff,#fff 60%);color:var(--ink);border:1px solid #bae6fd;border-radius:28px;padding:72px;display:grid;grid-template-columns:1.2fr 1fr;gap:56px;align-items:center;position:relative;overflow:hidden}
.cta-box::before{content:"";position:absolute;right:-90px;bottom:-110px;width:300px;height:300px;border-radius:50%;background:var(--yellow-soft);opacity:.7}
.cta-box>*{position:relative;z-index:1;min-width:0}
.cta-box h2{font-size:clamp(32px,4vw,52px)}
.cta-box h2 .serif{color:var(--blue)}
.cta-box p{color:var(--on-dark-muted);margin-top:18px;font-size:17px}
.cta-actions{display:grid;gap:14px}
.cta-actions .btn{justify-content:center}
.newsletter{margin-top:10px;padding-top:24px;border-top:1px solid var(--on-dark-line)}
.newsletter label{font-size:13px;color:var(--on-dark-muted)}
.newsletter form{display:flex;gap:8px;margin-top:10px;background:#fff;border:1px solid var(--on-dark-line);border-radius:999px;padding:6px}
.newsletter input{flex:1;min-width:0;background:transparent;border:0;color:var(--ink);font:inherit;font-size:15px;padding:8px 14px}
.newsletter input::placeholder{color:var(--on-dark-muted)}
.newsletter .btn{padding:10px 18px;font-size:14px}
.newsletter .msg{font-size:13px;color:var(--blue);margin-top:10px;min-height:1.4em}
@media (max-width:980px){.cta-box{grid-template-columns:1fr;padding:44px 28px;gap:36px}}

/* Footer */
footer{background:var(--white);border-top:1px solid var(--line)}
.foot{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;padding-block:64px 32px}
.foot .brand b{color:var(--ink)}
.foot .brand span{color:var(--muted)}
.foot p{color:var(--muted);font-size:14.5px;margin-top:16px;max-width:36ch}
.foot h4{margin:0 0 16px;font-size:13px;font-weight:700;letter-spacing:.12em;text-transform:uppercase}
.foot ul{list-style:none;margin:0;padding:0;display:grid;gap:10px;font-size:14.5px;color:var(--muted)}
.foot ul a:hover{color:var(--blue)}
.copy{grid-column:1/-1;border-top:1px solid var(--line);padding-top:24px;display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;font-size:13px;color:var(--muted)}
@media (max-width:860px){.foot{grid-template-columns:1fr 1fr}.foot>div:first-child{grid-column:1/-1}}

@media (prefers-reduced-motion:no-preference){
  .rise{animation:rise .9s cubic-bezier(.2,.7,.2,1) both}
  .d1{animation-delay:.08s}.d2{animation-delay:.16s}.d3{animation-delay:.24s}.d4{animation-delay:.34s}
  @keyframes rise{from{transform:translateY(16px);opacity:.01}to{transform:none;opacity:1}}
  .float{animation:bob 6s ease-in-out infinite}
  .float.f2{animation-delay:-2s}.float.f3{animation-delay:-4s}
  @keyframes bob{50%{transform:translateY(-8px)}}
}

/* ---------- Bổ sung cho theme ---------- */
body{margin:0}
img{max-width:100%;height:auto}
mark.hl{color:inherit}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.nav ul a[aria-current="page"]{color:var(--blue)}
.menu-toggle{display:none;background:#fff;border:1px solid var(--line);color:var(--ink);border-radius:99px;padding:9px 16px;font:inherit;font-size:14px;font-weight:600;cursor:pointer}
@media (max-width:980px){
  .menu-toggle{display:block}
  .nav .btn{display:none}
  .nav ul{display:none;position:absolute;left:0;right:0;top:100%;flex-direction:column;gap:0;background:#fff;border-bottom:1px solid var(--line);padding:8px max(20px,env(safe-area-inset-left,0px)) 20px;box-shadow:0 20px 30px -24px rgba(0,0,0,.25)}
  .nav ul.open{display:flex}
  .nav ul a{display:block;padding:12px 0;font-size:16px;color:var(--ink)}
  .nav ul li.menu-cta{padding-top:8px}
  .nav ul li.menu-cta a{display:inline-flex;color:#fff;padding:12px 22px}
}
@media (min-width:981px){.nav ul li.menu-cta{display:none}}
.portrait img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:top center}
.logos img{height:30px;width:auto;opacity:.6;filter:grayscale(1)}
.voice .avatar img{width:100%;height:100%;object-fit:cover;border-radius:50%}
.video .thumb{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.video .thumb+.shade{position:absolute;inset:0;background:linear-gradient(180deg,transparent 40%,rgba(255,255,255,.92))}
.post .cover img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .5s}
.post:hover .cover img{transform:scale(1.04)}
.post p.excerpt{color:var(--muted);font-size:15px}
.empty{color:var(--muted);border-top:1px solid var(--line);padding-top:24px}
.media+.posts{margin-top:56px}

/* Trang con: blog, chuyên mục, bài viết, trang tĩnh */
.page-head{padding-block:80px 56px;border-bottom:1px solid var(--line);background:linear-gradient(180deg,#f0f9ff,#fff)}
.page-head h1{font-size:clamp(38px,5.6vw,68px);margin-top:16px;max-width:22ch}
.page-head .sub{margin-top:18px;color:var(--muted);font-size:18px;max-width:60ch}
.page-head .meta{margin-top:24px;font-size:14px;color:var(--muted);display:flex;flex-wrap:wrap;gap:8px 22px}
.page-head .meta a{color:var(--blue)}
.hero-image{margin-top:44px;border-radius:var(--r);border:1px solid var(--line);width:100%}
.filters{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:48px}
.filters a{font-size:14px;font-weight:500;border:1px solid var(--line);padding:7px 16px;border-radius:99px;color:var(--muted)}
.filters a:hover{border-color:var(--sky);color:var(--blue)}
.filters a.active{border-color:var(--blue);background:var(--blue);color:#fff}
.pager{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-top:64px;padding-top:24px;border-top:1px solid var(--line);font-size:14.5px;font-weight:500}
.pager a{color:var(--blue)}
.pager span{color:var(--muted)}
.article{padding-block:64px 24px}
.prose{max-width:70ch;font-size:18px;line-height:1.8;color:#1f2328}
.prose>*+*{margin-top:1.15em}
.prose h2{font-size:32px;margin-top:1.7em;letter-spacing:-.02em}
.prose h3{font-size:24px;margin-top:1.5em}
.prose a{color:var(--blue);text-decoration:underline;text-underline-offset:3px}
.prose blockquote{margin-left:0;border-left:3px solid var(--sky);padding:4px 0 4px 22px;font-family:var(--serif);font-style:italic;font-size:24px;color:var(--ink)}
.prose code{font-size:15px;background:var(--blue-soft);padding:2px 6px;border-radius:6px}
.prose pre{background:#0a0a0a;color:#f5f5f5;padding:18px;border-radius:12px;overflow-x:auto}
.prose pre code{background:none;padding:0;color:inherit}
.prose img{border-radius:12px;border:1px solid var(--line)}
.prose ul,.prose ol{padding-left:1.3em}
.prose li+li{margin-top:.4em}
.tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:48px}
.tags a{font-size:13.5px;border:1px solid #7dd3fc;color:var(--blue-ink);padding:5px 12px;border-radius:99px}
.related{border-top:1px solid var(--line);padding-block:80px;background:var(--soft)}
.related h2{font-size:34px;margin-bottom:40px}
.cta-band.inner{padding-top:96px}