/* Giao diện mẫu. Màu lấy từ config.json (brand.colors) qua biến --primary, --accent, --ink, --muted, --bg, --card, --r.
   Đổi phong cách: sửa biến ở config, hoặc sửa tệp này. Mọi hiệu ứng tắt khi người dùng bật "giảm chuyển động". */
*{box-sizing:border-box}
[hidden]{display:none!important} /* thuộc tính hidden luôn thắng display:flex/grid */
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:Inter,"Inter Fallback",system-ui,-apple-system,"Segoe UI",sans-serif;font-size:16px;line-height:1.65;color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased}
@font-face{font-family:"Inter Fallback";src:local("Arial");size-adjust:107%;ascent-override:90%}
img{max-width:100%;height:auto}
a{color:var(--primary)}
h1,h2,h3{line-height:1.2;letter-spacing:-.01em;text-wrap:balance}
h1{font-size:clamp(30px,4.4vw,48px);margin:.4em 0}
h2{font-size:clamp(22px,2.8vw,32px);margin:1.6em 0 .5em}
h3{font-size:19px}
.wrap{max-width:1180px;margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-999px}.skip:focus{left:12px;top:12px;z-index:99;background:#fff;padding:8px 12px}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:6px}
.lede{font-size:19px;color:var(--muted);max-width:62ch}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:999px;padding:12px 22px;background:var(--primary);color:#fff;font:600 15px/1 inherit;font-family:inherit;cursor:pointer;text-decoration:none;transition:transform .15s,box-shadow .15s}
.btn:hover{transform:translateY(-1px);box-shadow:0 8px 24px -10px var(--primary)}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid #d5dbe6}
.linkbtn{background:none;border:0;padding:0;color:inherit;font:inherit;text-decoration:underline;cursor:pointer}

/* ---- Thanh menu ---- */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);border-bottom:1px solid #e6eaf2;transition:background .2s,box-shadow .2s}
.nav.scrolled{background:rgba(255,255,255,.78);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);box-shadow:0 6px 24px -18px rgba(0,0,0,.4)}
.nav-in{display:flex;align-items:center;gap:18px;height:68px}
.logo img{display:block;height:40px;width:auto}
.menu{display:flex;align-items:center;gap:2px;margin-left:auto}
.menu a.top,.dd-btn{display:flex;align-items:center;gap:6px;padding:10px 12px;border-radius:10px;color:var(--ink);font:500 15px/1 inherit;font-family:inherit;text-decoration:none;background:none;border:0;cursor:pointer;white-space:nowrap}
.menu a.top:hover,.dd-btn:hover,.menu a[aria-current="page"],.dd.on>.dd-btn{color:var(--primary);background:color-mix(in srgb,var(--primary) 8%,transparent)}
.dd{position:relative}
.dd-btn svg{width:12px;height:12px;fill:none;stroke:currentColor;stroke-width:1.6;transition:transform .15s}
.dd-panel{position:absolute;left:0;top:calc(100% + 8px);min-width:280px;padding:8px;background:var(--card);border:1px solid #e6eaf2;border-radius:var(--r);box-shadow:0 24px 48px -24px rgba(15,23,42,.35);opacity:0;visibility:hidden;transform:translateY(6px);transition:opacity .15s,transform .15s,visibility .15s}
.dd-panel::before{content:"";position:absolute;left:0;right:0;top:-10px;height:10px} /* cầu nối: rê chuột xuống không mất menu */
.dd-panel a{display:block;padding:10px 12px;border-radius:10px;color:var(--ink);text-decoration:none}
.dd-panel a b{display:block;font-weight:600}
.dd-panel a small{display:block;color:var(--muted);font-size:13px;line-height:1.4;margin-top:2px}
.dd-panel a:hover,.dd-panel a[aria-current="page"]{background:color-mix(in srgb,var(--primary) 8%,transparent)}
@media (hover:hover) and (min-width:1025px){.dd:hover>.dd-panel,.dd:focus-within>.dd-panel{opacity:1;visibility:visible;transform:none}.dd:hover .dd-btn svg{transform:rotate(180deg)}}
.dd.open>.dd-panel{opacity:1;visibility:visible;transform:none}.dd.open .dd-btn svg{transform:rotate(180deg)}
.burger{display:none;width:44px;height:44px;border:1px solid #d5dbe6;border-radius:12px;background:#fff;cursor:pointer;flex-direction:column;align-items:center;justify-content:center;gap:5px}
.burger span{display:block;width:20px;height:2px;background:var(--ink);transition:transform .2s,opacity .2s}
.burger[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
@media (max-width:1024px){
  .burger{display:flex;margin-left:auto}
  .join{display:none}
  .menu{display:none;position:absolute;top:68px;left:0;right:0;flex-direction:column;align-items:stretch;gap:0;padding:10px 16px 18px;background:#fff;border-bottom:1px solid #e6eaf2;max-height:calc(100vh - 68px);overflow:auto}
  .menu.open{display:flex}
  .menu a.top,.dd-btn{width:100%;justify-content:space-between;padding:14px 8px;font-size:16px}
  .dd-panel{position:static;min-width:0;box-shadow:none;border:0;border-left:2px solid color-mix(in srgb,var(--primary) 25%,transparent);border-radius:0;padding:0 0 0 10px;margin:0 0 6px 8px;display:none;opacity:1;visibility:visible;transform:none}
  .dd.open>.dd-panel{display:block}
  .dd-panel a small{display:none}
}

/* ---- Khối nội dung ---- */
main{min-height:60vh}
.crumbs{max-width:1180px;margin:14px auto 0;padding:0 20px;font-size:13px;color:var(--muted)}
.crumbs a{color:var(--muted)}
.hero{position:relative;overflow:hidden;padding:72px 0 56px}
.hero::before{content:"";position:absolute;inset:-30% -10% auto auto;width:620px;height:620px;border-radius:50%;background:radial-gradient(circle,color-mix(in srgb,var(--primary) 22%,transparent),transparent 65%);animation:troi 18s ease-in-out infinite alternate;pointer-events:none}
@keyframes troi{to{transform:translate(-80px,60px) scale(1.08)}}
.hero .wrap{position:relative}
.hero .actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
section{padding:24px 0}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin:18px 0}
@media (max-width:900px){.grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:600px){.grid{grid-template-columns:1fr}}
.card{display:flex;flex-direction:column;gap:8px;padding:22px;background:var(--card);border:1px solid #e6eaf2;border-radius:var(--r);color:var(--ink);text-decoration:none;transition:transform .2s,box-shadow .2s,border-color .2s}
a.card:hover{transform:translateY(-3px);border-color:color-mix(in srgb,var(--primary) 35%,#e6eaf2);box-shadow:0 18px 36px -24px rgba(15,23,42,.45)}
.card img{border-radius:calc(var(--r) - 6px);margin:-6px -6px 4px;width:calc(100% + 12px);max-width:none}
.card p{margin:0;color:var(--muted)}
.tag{display:inline-block;align-self:flex-start;font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:.06em;color:var(--accent)}
.meta{font-size:13px;color:var(--muted)}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{border:1px solid #d5dbe6;background:#fff;border-radius:999px;padding:8px 14px;font:500 14px/1 inherit;font-family:inherit;cursor:pointer}
.chip.on{background:var(--ink);color:#fff;border-color:var(--ink)}
.post-body{max-width:780px}
.post-body table{width:100%;border-collapse:collapse;display:block;overflow-x:auto}
.post-body th,.post-body td{border-bottom:1px solid #e6eaf2;padding:10px;text-align:left;vertical-align:top}
.post-body figure{margin:24px 0}.post-body figcaption{font-size:13px;color:var(--muted)}
details.faq{border:1px solid #e6eaf2;border-radius:12px;background:var(--card);margin:10px 0;padding:0 16px}
details.faq summary{cursor:pointer;font-weight:600;padding:14px 0}
.cta-box{margin:36px 0;padding:26px;border-radius:var(--r);background:color-mix(in srgb,var(--primary) 7%,var(--card));border:1px solid color-mix(in srgb,var(--primary) 20%,transparent)}
.cta-box h2{margin-top:0}

/* ---- Chân trang, nút nổi ---- */
.foot{margin-top:60px;padding:40px 0 90px;background:var(--ink);color:#cfd6e4}
.foot a,.foot .linkbtn{color:#fff}
.foot-in{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:28px}
.foot h3{color:#fff;font-size:15px;text-transform:uppercase;letter-spacing:.06em}
.foot p{margin:.3em 0}
.copy{font-size:13px;opacity:.7;margin-top:24px}
@media (max-width:800px){.foot-in{grid-template-columns:1fr}}
.float-cta{position:fixed;right:16px;bottom:16px;z-index:40;display:flex;flex-direction:column;gap:10px}
.float-cta a{display:grid;place-items:center;width:54px;height:54px;border-radius:50%;color:#fff;font-weight:700;font-size:13px;text-decoration:none;box-shadow:0 10px 24px -10px rgba(0,0,0,.5)}
.fz{background:#0068ff}.fp{background:var(--accent)}

/* ---- Form trượt, cookie ---- */
.drawer{position:fixed;inset:0;z-index:60}
.drawer-bg{position:absolute;inset:0;background:rgba(15,23,42,.45)}
.drawer-box{position:absolute;right:0;top:0;bottom:0;width:min(440px,100%);background:#fff;padding:28px 24px;overflow:auto;animation:vao .25s ease-out}
@keyframes vao{from{transform:translateX(30px);opacity:0}}
.drawer-x{position:absolute;right:14px;top:10px;border:0;background:none;font-size:30px;cursor:pointer}
form label{display:grid;gap:6px;margin:12px 0;font-size:14px;font-weight:500}
form input,form textarea{font:inherit;padding:12px;border:1px solid #d5dbe6;border-radius:10px;width:100%}
form .consent{grid-template-columns:auto 1fr;align-items:start;font-weight:400;font-size:13px;color:var(--muted)}
form .consent input{width:auto;margin-top:3px}
.hp{position:absolute!important;left:-9999px!important}
.form-msg{min-height:1.4em;font-size:14px}
.form-msg.err{color:#c62828}.form-msg.ok{color:#1b7f3b}
.ck-bar{position:fixed;left:16px;right:16px;bottom:16px;z-index:70;max-width:720px;margin:0 auto;display:flex;flex-wrap:wrap;gap:10px;align-items:center;padding:14px 16px;background:#fff;border:1px solid #e6eaf2;border-radius:16px;box-shadow:0 18px 40px -20px rgba(0,0,0,.45);font-size:14px}
.ck-bar p{flex:1 1 300px;margin:0}

@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}

/* ---- Meosu QT: nhận diện tím → xanh ngọc theo logo ---- */
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-weight:800;font-size:20px;letter-spacing:-.02em}
.logo img{height:40px;width:40px}
.logo b{background:linear-gradient(90deg,#7C3AED,#06B6D4);-webkit-background-clip:text;background-clip:text;color:transparent}
.foot .logo{color:#fff}
.btn{background:linear-gradient(100deg,#7C3AED,#4F46E5 55%,#0891B2)}
.btn.ghost{background:transparent}
.grad-t{background:linear-gradient(90deg,#7C3AED,#C026D3 45%,#0891B2);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero{padding:56px 0 40px}
.hero::after{content:"";position:absolute;left:-12%;bottom:-40%;width:520px;height:520px;border-radius:50%;background:radial-gradient(circle,color-mix(in srgb,#06B6D4 18%,transparent),transparent 65%);pointer-events:none}
.hero-g{display:grid;grid-template-columns:1.15fr .85fr;gap:32px;align-items:center}
.hero-g .art{justify-self:center;max-width:400px;filter:drop-shadow(0 30px 50px rgba(109,40,217,.35))}
@media (max-width:860px){.hero-g{grid-template-columns:1fr}.hero-g .art{max-width:170px;order:-1}}
.chips-row{display:flex;flex-wrap:wrap;gap:8px;margin:18px 0 0;padding:0;list-style:none}
.chips-row li{font-size:13px;font-weight:600;padding:6px 12px;border-radius:999px;background:#fff;border:1px solid #e4dcf7;color:var(--ink)}
.card .ico{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;font-size:22px;background:linear-gradient(135deg,#EDE4FF,#DDF6FB)}
.steps{counter-reset:b;display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin:18px 0;padding:0;list-style:none}
.steps li{position:relative;padding:22px;background:var(--card);border:1px solid #e6eaf2;border-radius:var(--r)}
.steps li::before{counter-increment:b;content:counter(b);display:grid;place-items:center;width:34px;height:34px;border-radius:50%;margin-bottom:10px;color:#fff;font-weight:700;background:linear-gradient(135deg,#7C3AED,#0891B2)}
.steps li p{margin:.3em 0 0;color:var(--muted)}
@media (max-width:900px){.steps{grid-template-columns:repeat(2,1fr)}}
@media (max-width:600px){.steps{grid-template-columns:1fr}}
.band{margin:24px 0;padding:34px 28px;border-radius:calc(var(--r) + 6px);background:linear-gradient(120deg,#1B1036,#3B1D7A 60%,#0B5568);color:#EDE9FE}
.band h2{color:#fff;margin-top:0}.band p{color:#D9D2F5}
.band .btn{background:#fff;color:#3B1D7A}
.note{font-size:14px;color:var(--muted);border-left:3px solid #C4B5FD;padding:6px 12px;background:#fff;border-radius:0 10px 10px 0}
.spec td:first-child{font-weight:600;white-space:nowrap}
code{background:#EFEAFD;padding:2px 6px;border-radius:6px;font-size:.92em;word-break:break-all}