/* saola IQ, "Lớp học AI" style: navy AI stage for heroes and accent bands, light paper for reading,
   teal leads, warm gold for the school feel. Loaded after the original stylesheets and vi.css. */
@font-face{font-family:'Lexend';font-style:normal;font-display:swap;font-weight:400 550;src:url('fonts/lexend-vietnamese-500-normal.woff2') format('woff2');unicode-range:U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB}
@font-face{font-family:'Lexend';font-style:normal;font-display:swap;font-weight:400 550;src:url('fonts/lexend-latin-500-normal.woff2') format('woff2');unicode-range:U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD}
@font-face{font-family:'Lexend';font-style:normal;font-display:swap;font-weight:551 650;src:url('fonts/lexend-vietnamese-600-normal.woff2') format('woff2');unicode-range:U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB}
@font-face{font-family:'Lexend';font-style:normal;font-display:swap;font-weight:551 650;src:url('fonts/lexend-latin-600-normal.woff2') format('woff2');unicode-range:U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD}
@font-face{font-family:'Lexend';font-style:normal;font-display:swap;font-weight:651 900;src:url('fonts/lexend-vietnamese-700-normal.woff2') format('woff2');unicode-range:U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB}
@font-face{font-family:'Lexend';font-style:normal;font-display:swap;font-weight:651 900;src:url('fonts/lexend-latin-700-normal.woff2') format('woff2');unicode-range:U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD}
@font-face{font-family:'IBM Plex Mono';font-style:normal;font-display:swap;font-weight:400 550;src:url('fonts/ibm-plex-mono-vietnamese-500-normal.woff2') format('woff2');unicode-range:U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB}
@font-face{font-family:'IBM Plex Mono';font-style:normal;font-display:swap;font-weight:400 550;src:url('fonts/ibm-plex-mono-latin-500-normal.woff2') format('woff2');unicode-range:U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD}
@font-face{font-family:'IBM Plex Mono';font-style:normal;font-display:swap;font-weight:551 900;src:url('fonts/ibm-plex-mono-vietnamese-600-normal.woff2') format('woff2');unicode-range:U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB}
@font-face{font-family:'IBM Plex Mono';font-style:normal;font-display:swap;font-weight:551 900;src:url('fonts/ibm-plex-mono-latin-600-normal.woff2') format('woff2');unicode-range:U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD}
:root{
  --ink:#0E1A2B;--muted:#4F5F74;--blue:#1C5FD8;--deep:#06142A;--ice:#F3F6FA;--line:#DCE4EE;--field:#E8F0F8;
  --radius:20px;--shadow:0 26px 50px -32px rgba(14,26,43,.38);
  --night:#06142A;--night-2:#0B1F3D;--night-3:#10284C;--nline:rgba(140,175,225,.16);--nline-2:rgba(140,175,225,.30);
  --nink:#EEF3FB;--nmuted:#AFBED2;--nmuted-2:#8597B2;
  --teal:#00B5AC;--teal-b:#2FD4C4;--teal-ink:#0B7F78;--teal-soft:#E0F5F2;
  --blue-b:#5B9DFF;--blue-soft:#E6EEFC;--gold:#E8A02C;--gold-soft:#FFF4DC;--indigo:#3A3DB0;
  --paper:#FBFCFE;--tint:#F3F6FA;
  --grad:linear-gradient(100deg,#2FD4C4 0%,#5B9DFF 100%);
  --grad-hover:linear-gradient(100deg,#4FE2D4 0%,#7AB0FF 100%);
  --grad-ink:linear-gradient(100deg,#00A79E 0%,#1C5FD8 100%);
  --ribbon:linear-gradient(90deg,#2FD4C4 0%,#5B9DFF 55%,#E8A02C 100%);
  --dots:radial-gradient(rgba(14,26,43,.065) 1px,transparent 1.3px);
  --display:'Lexend','Be Vietnam Pro',system-ui,sans-serif;
  --mono:'IBM Plex Mono',ui-monospace,Menlo,monospace;
  --page-gap:clamp(20px,3.5vw,64px);
}
.container{width:min(1320px,calc(100% - var(--page-gap)*2))}

/* ---------- base ---------- */
body{background:var(--paper);color:var(--ink)}
p{color:var(--muted)}
h1,h2,h3,h4{font-family:var(--display);font-weight:600;color:var(--ink);letter-spacing:-.02em}
h1{letter-spacing:-.03em}
h2{letter-spacing:-.025em}
::selection{background:#BDEFEA;color:#06142A}
a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--teal);outline-offset:4px}
::-webkit-scrollbar-thumb{background:#B9C8DA}

/* the new style opens sections with a small label instead of drawing a marker before each heading */
main :is(h1,h2,h3,h4){padding-inline-start:0}
main :is(h1,h2,h3,h4)::before{content:none!important;display:none!important}

.ai-kicker,.ci-index,.h-section-label,main .suite-label,main .h-product-label,.product-index{
  display:inline-flex;align-items:center;gap:10px;width:auto;min-width:0;min-height:0;margin:0 0 16px;padding:0;
  background:none;border:0;border-radius:0;font:500 12.5px/1.3 var(--mono);letter-spacing:.14em;text-transform:uppercase;
  color:var(--teal-ink);font-variant-numeric:normal}
.ai-kicker::before,.ci-index::before,.h-section-label::before,main .suite-label::before,main .h-product-label::before,.product-index::before{
  content:'';width:22px;height:1px;background:currentColor;flex:none}
.product-index strong{font:inherit;letter-spacing:inherit}
.ai-stage :is(.ai-kicker,.h-section-label,.suite-label,.h-product-label,.product-index),
.product-card.mint .product-index{color:var(--teal-b);background:none}
.ai-g{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.ai-gi{background:var(--grad-ink);-webkit-background-clip:text;background-clip:text;color:transparent}

/* ---------- buttons and links ---------- */
.button,.button.white,.hero .button,.cta .button.white,.research-grid .button{
  min-height:52px;padding:14px 26px;border-radius:999px;gap:12px;font-weight:600;line-height:1.3;
  background:var(--grad);color:#04101F;box-shadow:0 14px 32px -16px rgba(47,212,196,.75)}
.button:hover,.button.white:hover,.cta .button.white:hover,.research-grid .button:hover{background:var(--grad-hover);color:#04101F;transform:translateY(-2px)}
.button.secondary{background:#fff;color:var(--ink);border:1px solid var(--line);box-shadow:none}
.button.secondary:hover{background:#fff;border-color:var(--teal);color:var(--ink)}
.ai-ghost,.ai-ghost:hover{background:rgba(255,255,255,.05);color:#fff;border:1px solid rgba(213,224,236,.34);box-shadow:none}
.ai-ghost:hover{background:rgba(255,255,255,.1)}
.text-link{color:var(--teal-ink);font-weight:600}
.ai-stage .text-link{color:var(--teal-b)}

/* ---------- header (navy on every page) ---------- */
.site-header{background:rgba(6,20,42,.95);border:0;border-bottom:1px solid var(--nline);color:var(--nink);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px)}
.site-header::after{content:'';position:absolute;left:0;right:0;top:0;height:3px;background:var(--ribbon);pointer-events:none}
.brand{width:206px}
.main-nav{color:#C9D6E8;font-weight:500;font-size:14.5px}
.main-nav>a:hover,.nav-group summary:hover{color:#fff}
.main-nav>a[aria-current=page],.nav-group summary[aria-current=page]{color:#fff;text-decoration:underline;text-decoration-color:var(--teal-b);text-decoration-thickness:2px;text-underline-offset:10px}
.nav-dropdown{background:#0B1F3D;border:1px solid var(--nline-2);border-top:2px solid var(--teal-b);border-radius:0 0 14px 14px;box-shadow:0 30px 60px -24px rgba(0,0,0,.7)}
.nav-dropdown a{color:#C9D6E8;border-radius:8px}
.nav-dropdown a:hover,.nav-dropdown a:focus-visible{background:rgba(255,255,255,.07);color:#fff}
.main-nav>a.nav-cta{background:var(--grad);color:#04101F;border-radius:999px;padding:11px 18px;font-weight:600}
.main-nav>a.nav-cta:hover{background:var(--grad-hover);color:#04101F}
.menu-toggle span{background:#fff}
.skip-link{border-color:var(--teal)}

/* ---------- navy AI stage ---------- */
.ai-stage{position:relative;isolation:isolate;overflow:hidden;background:var(--night);color:var(--nink)}
.ai-stage::before{content:'';position:absolute;inset:0;z-index:-3;pointer-events:none;
  background-image:linear-gradient(rgba(140,175,225,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(140,175,225,.05) 1px,transparent 1px);
  background-size:64px 64px;-webkit-mask-image:linear-gradient(180deg,#000 10%,transparent 92%);mask-image:linear-gradient(180deg,#000 10%,transparent 92%)}
.ai-stage::after{content:'';position:absolute;inset:0;z-index:-3;pointer-events:none;
  background:radial-gradient(760px 480px at 84% 12%,rgba(47,212,196,.15),transparent 62%),radial-gradient(820px 560px at 4% 104%,rgba(91,157,255,.15),transparent 60%)}
.ai-net{position:absolute;inset:0;width:100%;height:100%;z-index:-2;pointer-events:none}
.ai-stage :is(h1,h2,h3,h4){color:#fff}
.ai-stage p,.ai-stage .small{color:var(--nmuted)}
.ai-stage .lead{color:#C6D2E3}
.ai-stage .breadcrumbs{color:var(--nmuted-2)}
.ai-stage .breadcrumbs a:hover{color:#fff}
.ai-stage .breadcrumbs span[aria-current]{color:var(--teal-b)}

/* ---------- home hero ---------- */
.ai-hero .ai-hero-grid{display:grid;grid-template-columns:minmax(0,1fr) 520px;gap:56px;align-items:center;padding-block:64px 58px}
.ai-pill{display:inline-flex;align-items:center;gap:10px;min-height:34px;padding:6px 16px;border-radius:999px;border:1px solid rgba(232,160,44,.45);
  background:rgba(232,160,44,.1);color:#F6D9A4;font-size:13.5px;font-weight:500;line-height:1.3}
.ai-pill i{width:8px;height:8px;border-radius:50%;background:var(--gold);box-shadow:0 0 0 4px rgba(232,160,44,.2);flex:none}
.ai-hero h1{margin-top:26px;font-size:clamp(40px,4.2vw,58px);line-height:1.13;letter-spacing:-.03em}
.ai-hero h1>span{display:block}
.ai-hero .lead{margin-top:22px;max-width:540px;font-size:18px;line-height:1.68}
.ai-hero .lead b{color:#EAF0F8;font-weight:600}
.ai-hero .actions{margin-top:34px;gap:14px}
.ai-hero-vis{position:relative;height:680px}
/* the girl and the robot are two cut-out layers on one square canvas, so they keep their original composition */
.ai-scene{position:absolute;right:0;top:0;width:100%;aspect-ratio:1/1;max-height:100%}
.ai-scene::before{content:'';position:absolute;inset:-14% -10% 6%;border-radius:50%;
  background:radial-gradient(ellipse at 44% 46%,rgba(28,95,216,.55),rgba(28,95,216,.16) 44%,rgba(28,95,216,0) 70%)}
.ai-scene img{position:absolute;inset:0;width:100%;height:100%;display:block}
.ai-girl{z-index:1;-webkit-mask-image:linear-gradient(180deg,#000 74%,rgba(0,0,0,0) 99%);mask-image:linear-gradient(180deg,#000 74%,rgba(0,0,0,0) 99%)}
.ai-bot{z-index:2;filter:drop-shadow(0 0 22px rgba(47,212,196,.5));animation:ai-float 3.4s ease-in-out infinite alternate}
@keyframes ai-float{from{transform:translateY(-7px)}to{transform:translateY(9px)}}
.ai-console{position:absolute;left:-24px;bottom:0;z-index:2;width:384px;padding:13px 15px;border-radius:18px;background:rgba(11,31,61,.95);border:1px solid var(--nline-2);
  box-shadow:0 40px 80px -30px rgba(0,0,0,.85),0 0 0 6px rgba(47,212,196,.05);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);font-size:13px}
.ai-c-bar{display:flex;align-items:center;gap:12px;padding-bottom:10px;border-bottom:1px solid var(--nline)}
.ai-dots{display:flex;gap:5px}.ai-dots i{width:8px;height:8px;border-radius:50%;background:#2A4166}
.ai-c-bar b{display:inline-flex;align-items:center;gap:7px;font:500 14px/1.2 var(--display);color:#fff}
.ai-c-bar b svg{width:14px;height:14px;color:var(--teal-b)}
.ai-c-bar em{margin-left:auto;padding:4px 6px;border:1px solid var(--nline-2);border-radius:5px;font:500 9.5px/1 var(--mono);letter-spacing:.12em;font-style:normal;text-transform:uppercase;color:var(--nmuted-2)}
.ai-console p{max-width:none}
.ai-c-user{margin:10px 0 0 40px;padding:9px 12px;border-radius:12px 12px 4px 12px;background:#173563;color:#EAF1FB!important;line-height:1.5}
.ai-c-ai{display:flex;align-items:center;gap:9px;margin-top:10px;color:#C9D6E8!important;line-height:1.4}
.ai-c-ai span{display:grid;place-items:center;width:22px;height:22px;border-radius:6px;background:var(--grad);color:#04101F;font:700 10px/1 var(--display);flex:none}
.ai-steps{list-style:none;display:grid;gap:3px;margin:8px 0 0;padding:0}
.ai-steps li{display:grid;grid-template-columns:22px minmax(0,1fr) auto;align-items:center;gap:10px;min-height:29px;padding:0 11px 0 7px;border:1px solid var(--nline);border-radius:8px;background:rgba(255,255,255,.025)}
.ai-steps li>i{display:grid;place-items:center;width:20px;height:20px;border-radius:50%;border:1px solid rgba(47,212,196,.55);color:var(--teal-b);font:500 11px/1 var(--mono);font-style:normal}
.ai-steps b{font:500 13.5px/1.2 var(--display);color:#fff}
.ai-steps b em{margin-left:7px;font:500 10px/1 var(--mono);font-style:normal;color:var(--nmuted-2);letter-spacing:.04em}
.ai-steps time{font:500 11px/1 var(--mono);color:var(--teal-b)}
.ai-steps li.on{border-color:rgba(47,212,196,.45);background:rgba(47,212,196,.06)}
.ai-caret{display:inline-block;width:2px;height:14px;margin-left:4px;vertical-align:-2px;background:var(--teal-b);animation:ai-blink 1s steps(1) infinite}
@keyframes ai-blink{50%{opacity:0}}
.ai-c-foot{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:10px;padding-top:10px;border-top:1px solid var(--nline)}
.ai-wait{display:inline-flex;align-items:center;gap:8px;color:#F2C979;font-weight:500;font-size:12.5px;line-height:1.3}
.ai-wait i{width:7px;height:7px;border-radius:50%;background:var(--gold);flex:none}
.ai-ok{display:inline-flex;align-items:center;gap:6px;min-height:30px;padding:4px 12px;border-radius:999px;border:1px solid rgba(47,212,196,.5);color:var(--teal-b);font-weight:600;font-size:12.5px}
.ai-ok svg{width:13px;height:13px}
.ai-stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));border-top:1px solid var(--nline);padding-block:30px 36px}
.ai-stats>div{padding:0 28px;border-left:1px solid var(--nline)}
.ai-stats>div:first-child{padding-left:0;border-left:0}
.ai-stats b{display:block;font:600 40px/1 var(--display);letter-spacing:-.02em;color:#fff;font-variant-numeric:tabular-nums}
.ai-stats b small{font-size:28px;color:var(--teal-b);font-weight:600}
.ai-stats span{display:block;margin-top:10px;font-size:14px;line-height:1.45;color:var(--nmuted)}
/* typing demo: hidden parts are shown as the script reaches them (everything is visible without script) */
.ai-console.typing .ai-steps li:not(.shown),.ai-console.typing .ai-c-ai:not(.shown),.ai-console.typing .ai-c-foot:not(.shown){opacity:0;transform:translateY(4px)}
.ai-console .ai-steps li,.ai-console .ai-c-ai,.ai-console .ai-c-foot{transition:opacity .35s ease,transform .35s ease}

/* ---------- light sections ---------- */
.paper-dots{background:var(--paper) var(--dots);background-size:auto,22px 22px}
.blue-wash{background:var(--tint)}
.section-heading h2,.ci-heading h2{color:var(--ink)}
.ai-stage .section-heading h2{color:#fff}
.ai-stage .section-heading>p{color:var(--nmuted)}

/* home: core innovation */
.core-innovation{background-color:var(--paper);background-image:var(--dots);background-size:22px 22px;padding:100px 0 64px}
.ci-heading{margin-bottom:44px}
.ci-heading p{color:var(--muted)}
.ci-grid{gap:24px}
.ci-grid article{background:#fff;border:1px solid var(--line);border-radius:22px;transition:transform .25s,box-shadow .25s,border-color .25s}
.ci-grid article:hover{transform:translateY(-4px);border-color:rgba(0,181,172,.5);box-shadow:0 26px 50px -30px rgba(11,127,120,.5),0 0 0 4px rgba(0,181,172,.07)}
.core-innovation .ci-visual,.ci-grid article:nth-child(2) .ci-visual{background:linear-gradient(160deg,#EEF6FF,#E2EDFA);border:0}
.ci-copy{padding:26px 26px 28px}
.ci-copy h3{color:var(--ink);font-size:24px}
.ci-copy p{color:var(--muted);font-size:15.5px;line-height:1.75}
.ci-takeaway{align-self:flex-start;padding:7px 13px;border-radius:999px;background:var(--teal-soft);color:var(--teal-ink);font-weight:600;font-size:13px}
.ci-grid article:nth-child(2) .ci-takeaway{background:var(--gold-soft);color:#7A4E06}

/* home + Learning & Teaching: product cards */
.product-grid{gap:24px}
.product-card,.product-card.mint,.product-card.peach{border:1px solid var(--line);border-radius:28px;background:#fff;overflow:hidden;min-height:380px;
  transition:transform .25s,box-shadow .25s,border-color .25s}
.product-card:hover,.product-card.peach:hover{background:#fff;border-color:rgba(0,181,172,.45);transform:translateY(-3px);box-shadow:0 30px 60px -36px rgba(11,127,120,.55),0 0 0 4px rgba(0,181,172,.07)}
.product-art,.product-art.home-product-art,.peach .product-art,.product-card.peach{background:#fff}
.product-art.home-product-art,.peach .product-art{background:linear-gradient(160deg,#EEF5FF,#E1ECFA)}
.product-text h3{font-size:clamp(28px,2.6vw,40px);color:var(--ink)}
.product-text p{color:var(--muted)}
.product-text .text-link{color:var(--teal-ink)}
.product-card.mint{position:relative;isolation:isolate;background:var(--night);border-color:transparent;color:#fff}
.product-card.mint::after{content:'';position:absolute;inset:0;z-index:-1;background:radial-gradient(520px 380px at 85% 10%,rgba(47,212,196,.18),transparent 62%),radial-gradient(520px 380px at 0% 100%,rgba(91,157,255,.16),transparent 60%)}
.product-card.mint:hover{background:var(--night);border-color:rgba(47,212,196,.45)}
.mint .product-art{background:transparent;padding:36px 36px 0}
.mint .product-text h3{color:#fff}
.mint .product-text p{color:var(--nmuted)}
.mint .product-text .text-link{color:var(--teal-b)}
.screen-art img{border-radius:12px 12px 0 0;border:1px solid rgba(255,255,255,.14);border-bottom:0}

/* home: research band (navy stage) */
.research-band{background:var(--night)}
.research-grid h2{color:#fff}
.research-grid p{color:#C6D2E3}

/* home: pilot */
.vi-pilot .news-empty{background:#fff;border:1px solid var(--line);border-radius:24px;padding:36px 40px;box-shadow:var(--shadow)}
.vi-pilot .news-empty h3{color:var(--ink)}
.vi-pilot .news-empty .text-link{color:var(--teal-ink)}

/* home: flipbook */
.ai-flip-grid{display:grid;grid-template-columns:minmax(0,440px) minmax(0,1fr);gap:56px;align-items:center;padding-block:96px}
.ai-flip h2{font-size:clamp(32px,3.2vw,44px);line-height:1.18}
.ai-flip p{margin-top:16px;font-size:17px;line-height:1.65}
.ai-flip .actions{margin-top:30px;gap:18px}
.ai-flip .small{font-size:13.5px}
.ai-dock{display:flex;flex-wrap:nowrap;align-items:center;gap:5px;margin-top:30px}
.ai-dock span{margin-right:4px;font:500 11px/1 var(--mono);letter-spacing:.12em;text-transform:uppercase;color:var(--nmuted-2)}
.ai-dock a{display:grid;place-items:center;min-width:28px;height:28px;padding:0 3px;border-radius:8px;border:1px solid var(--nline-2);font:500 12px/1 var(--mono);color:#C9D6E8}
.ai-dock a:hover{background:var(--grad);border-color:transparent;color:#04101F}
.ai-book{display:block;border-radius:8px;overflow:hidden;box-shadow:0 50px 90px -30px rgba(0,0,0,.85),0 0 0 1px rgba(255,255,255,.08);transition:transform .3s}
.ai-book:hover{transform:translateY(-4px)}
.ai-book img{width:100%;height:auto}

/* CTA band (home, About, Assessment) */
.ai-stage+.cta{margin-top:100px}
.cta{background:linear-gradient(120deg,#E2F6F3 0%,#E6EEFC 60%,#EEE9FB 100%);border:1px solid #D4E3EE;border-radius:32px;color:var(--ink);min-height:340px}
.cta h2{color:var(--ink)}
.cta p{color:var(--muted)}
.cta-robot{filter:drop-shadow(0 24px 40px rgba(14,26,43,.25))}

/* ---------- inner page heroes on the navy stage ---------- */
.ai-page-top .breadcrumbs{padding-top:26px}
.ai-page-top .page-hero{position:relative;padding-block:28px 76px;min-height:0}
.ai-page-top .page-hero h1{color:#fff;font-size:clamp(40px,4.4vw,62px)}
.ai-page-top .page-hero-art{filter:drop-shadow(0 30px 50px rgba(0,0,0,.5))}
.ai-page-top .page-hero:has(img[src*="students"]) .page-hero-art{border-radius:24px;border:1px solid rgba(255,255,255,.14);filter:none;box-shadow:0 34px 70px -26px rgba(0,0,0,.7)}
.ai-page-top .page-hero::after{content:'';position:absolute;right:2%;top:50%;width:420px;height:420px;transform:translateY(-50%);z-index:-1;pointer-events:none;
  background:radial-gradient(circle,rgba(47,212,196,.2),transparent 66%)}
.ai-page-top .page-hero .product-index{margin-bottom:18px}
.not-found-stage .not-found{min-height:62vh;display:flex;flex-direction:column;justify-content:center;align-items:flex-start}

/* ---------- About ---------- */
.research-list>div{background:#fff;border:1px solid var(--line);border-radius:20px;padding:26px;margin-bottom:14px}
.research-list>div:first-child{padding-top:26px}
.research-list h3{font-size:22px}
.two-values .lead{color:var(--ink)}

/* ---------- Learning & Teaching overview ---------- */
.support-art{border-radius:24px}
.resource-lines span{background:#fff;border:1px solid var(--line);border-radius:16px;color:var(--ink)}
.availability{background:#fff;border:1px solid var(--line);border-radius:14px;color:var(--ink)}

/* ---------- Assessment ---------- */
.assessment-flow{background:#fff;border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow)}
.assessment-flow>span{background:var(--tint);border-radius:12px}
.assessment-flow i{color:var(--teal)}
.assessment-flow>strong{background:var(--grad);color:#04101F;border-radius:12px}
.assessment-copy>article:first-child,.assessment-copy article+article{background:#fff;border:1px solid var(--line);border-radius:20px;padding:28px}
.assessment-copy h2{font-size:26px}

/* ---------- Contact ---------- */
.contact-status,.enquiry{background:#fff;border:1px solid var(--line);border-radius:20px}
.contact-status .vi-mail{color:var(--teal-ink)}
.ai-copy-row{display:flex;flex-wrap:wrap;align-items:center;gap:8px 14px;margin-top:12px}
.ai-copy{display:inline-flex;align-items:center;gap:8px;min-height:40px;padding:8px 16px;border:1px solid var(--line);border-radius:999px;background:#fff;color:var(--ink);font-weight:600;font-size:14px;line-height:1.2}
.ai-copy:hover{border-color:var(--teal)}
.ai-copy svg{width:16px;height:16px;color:var(--teal-ink)}
.ai-copy-msg{font-size:13.5px;color:var(--teal-ink)}
.ai-copy-msg:empty{display:none}
.enquiry .button.secondary:hover{background:#fff}
.platform-panel{position:relative;isolation:isolate;overflow:hidden;background:var(--night);border-radius:24px;color:var(--nink)}
.platform-panel::after{content:'';position:absolute;inset:0;z-index:-1;background:radial-gradient(420px 320px at 90% 0%,rgba(47,212,196,.2),transparent 62%),radial-gradient(420px 320px at 0% 100%,rgba(91,157,255,.18),transparent 60%)}
.platform-panel h2{color:#fff}
.platform-panel>p{color:var(--nmuted)}
.platform-link{border-bottom:1px solid var(--nline);color:#fff}
.platform-link:hover{color:var(--teal-b)}
.platform-panel .small{color:var(--nmuted)}

/* ---------- section navigation on the long product pages ---------- */
.section-nav{background:rgba(251,252,254,.94);border:0;border-bottom:1px solid var(--line);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}
.section-nav a{color:var(--muted);font-weight:500;border-bottom:2px solid transparent}
.section-nav a:hover{color:var(--ink)}
.section-nav a.active{color:var(--ink);text-decoration:none;border-color:var(--teal)}

/* ---------- AI Literacy (suite) ---------- */
.suite-one{--suite-blue:#1C5FD8;--suite-purple:#3A3DB0;--suite-teal:#0B8F86;--suite-gold:#E8A02C;--suite-ground:#F3F6FA}
.suite-one .ai-page-top .breadcrumbs{padding-block:26px 0}
.suite-banner{background:transparent;border:0;padding:30px 0 72px}
.suite-banner h1{color:#fff}
.suite-intro{background:var(--paper)}
.suite-intro-copy p{color:var(--muted)}
.suite-real-photos img,.suite-students{border-radius:18px}
.suite-availability{background:#fff;border:1px solid var(--line);border-left:3px solid var(--teal);border-radius:14px}
.suite-availability strong{color:var(--ink)}
.suite-tint{background:var(--tint)}
.suite-section h2{color:var(--ink)}
.suite-panel{border:1px solid var(--line);border-top:3px solid var(--tone);border-radius:20px;background:#fff}
.suite-panel h3{color:var(--ink)}
.suite-one .vi-stage{background:#fff;border:1px solid var(--line);border-left:0;border-radius:20px;overflow:hidden}
main .suite-one .suite-ribbon{border-radius:0 0 18px 0;clip-path:none;font-family:var(--display);font-weight:600}
.suite-pills span{border-radius:999px;background:#fff}
.vi-stage.primary,.vi-course-grid .st-primary{--stage:#0B8F86}
.vi-stage.middle,.vi-course-grid .st-middle{--stage:#1C5FD8}
.vi-stage.high,.vi-course-grid .st-high{--stage:#3A3DB0}
.suite-course-grid figure{border-radius:16px}
.suite-roles{gap:14px}
.suite-roles article,.suite-roles article:nth-child(n){border-radius:20px;background:linear-gradient(160deg,#0B1F3D,#10284C);border:1px solid var(--nline);color:#fff}
.suite-roles article:nth-child(2){background:linear-gradient(160deg,#0C2444,#122E57)}
.suite-roles article:nth-child(3){background:linear-gradient(160deg,#0D2848,#14335F)}
.suite-roles article:nth-child(4){background:linear-gradient(160deg,#0E2B4E,#163867)}
.suite-roles h3{color:#fff}
.suite-roles p{color:var(--nmuted)}
.suite-resource{border:1px solid var(--line);border-radius:22px;background:#fff}
.suite-resource h3,.suite-resource:not(.gold) h3{background:var(--night-2);color:#fff;padding-left:62px}
.suite-resource.gold h3{background:var(--gold);color:var(--ink)}
.suite-edition{border:1px solid var(--line);border-radius:22px;background:#fff}
.suite-edition img{border-radius:14px}

/* ---------- Studio soạn bài AI (harness) ---------- */
.harness-page{--h-blue:#1C5FD8;--h-deep:#0E1A2B;--h-purple:#3A3DB0;--h-teal:#0B8F86;--h-gold:#E8A02C;--h-ground:#F3F6FA;--h-tint:#EEF3F9}
.harness-page .ai-page-top .breadcrumbs{padding-block:26px 0}
.h-banner{background:transparent;border:0;padding:30px 0 64px}
.h-banner h1,.h-banner p{color:#fff}
.h-banner .h-hero-subtitle{color:#DCE6F3}
.h-cover-robot{border-radius:24px;border:1px solid rgba(255,255,255,.14);box-shadow:0 34px 70px -26px rgba(0,0,0,.7)}
.h-hero-features li{color:#C6D2E3}
.h-tint{background:var(--tint)}
.h-heading h2,.h-group-title,.h-subheading{color:var(--ink)}
.h-heading>p{color:var(--muted)}
.h-teachers{border-radius:20px}
.h-cycle{background:#fff;border:1px solid var(--line);border-radius:20px}
.h-principle,.h-framework-card,.h-step-panel,.h-tool-grid article,.h-capability,.h-showcase article{border-radius:20px;background:#fff;overflow:hidden}
.h-framework-card{border:1px solid var(--line)}
/* cards: hairline frame, one 3px accent on top (the original coloured the whole frame on alternate cards) */
.h-principle,.h-principle:nth-child(3),.h-step-panel,.h-step-panel:nth-child(even),.h-tool-grid article,.h-tool-grid article:nth-child(n),
.h-capability,.h-capability:nth-child(even),.h-showcase article,.h-showcase article:nth-child(even),.h-course-steps>li,.h-course-steps>li:nth-child(n+4){
  border:1px solid var(--line);border-top:3px solid var(--h-blue)}
.h-principle:nth-child(3),.h-step-panel:nth-child(even),.h-tool-grid article:nth-child(2),.h-capability:nth-child(even),
.h-showcase article:nth-child(even),.h-course-steps>li:nth-child(n+4){border-top-color:var(--h-gold)}
.h-principle .h-number{border-radius:0 0 14px 0}
.h-number{background:var(--grad);color:#04101F}
.h-principle:nth-child(3) .h-number,.h-course-steps>li:nth-child(n+4)>.h-number{background:var(--gold);color:var(--ink)}
.h-principle h3,.h-step-copy h3,.h-course-steps h3,.h-capability h3,.h-example-heading h3,.h-roles h3,.h-chain h3{color:var(--ink)}
.h-roles{background:#fff;border:1px solid var(--line);border-left:3px solid var(--teal);border-radius:20px}
.h-chain{background:#fff;border:1px solid var(--line);border-radius:20px}
.h-chain li{background:var(--grad);color:#04101F;border-radius:12px;font-weight:600}
.h-chain li:last-child{background:var(--gold);color:var(--ink)}
.h-chain li:not(:last-child)::after{color:var(--teal-ink)}
.h-framework-card{padding:0 28px 28px}
.h-framework-card h4,.h-framework-card:not(.gold) h4{background:var(--night-2);color:#fff;padding-left:28px}
.h-framework-card.gold h4{background:var(--gold);color:var(--ink)}
.h-tags li{border-radius:8px;border-left:3px solid var(--tone)}
.h-framework-card h4::before{content:none!important}
.h-tool-grid article:nth-child(3){border-top-color:var(--h-teal)}
.h-course-steps>li{background:#fff;border-radius:20px}
.h-capability-number{color:var(--teal-ink);font-family:var(--display)}
.h-example-subject{font:500 12.5px/1.3 var(--mono);letter-spacing:.12em;text-transform:uppercase;color:var(--teal-ink)}
.h-stat-strip{background:var(--night);border-radius:22px;overflow:hidden}
.h-stat-strip a:hover{background:var(--night-3)}
.h-stat-strip strong{font-family:var(--display);color:var(--gold)}
.h-stat-strip span{color:#C6D2E3}
.h-tools{border-top:1px solid var(--line)}
.h-closing{background:var(--night);border-top:0}
.h-closing h2,.h-closing p{color:#fff}
.h-closing .h-credit{color:var(--nmuted)}
.harness-page .image-open,.image-open{border-radius:12px}
.zoom-label{border-radius:999px;background:rgba(255,255,255,.94);color:var(--ink)}
.image-open:hover .zoom-label{background:var(--teal);color:#fff}

/* ---------- footer ---------- */
footer{position:relative;background:var(--night);border:0;padding-top:72px}
footer::before{content:'';position:absolute;left:0;right:0;top:0;height:3px;background:var(--ribbon)}
.footer-brand{background:none;padding:0;width:206px;border-radius:0}
.footer-top p,.footer-top>div>a:not(.brand){color:#AFBED2}
.footer-top a:hover{color:#fff}
.footer-top h2{color:#fff;font:500 12px/1.3 var(--mono);letter-spacing:.14em;text-transform:uppercase}
.footer-bottom{border-top:1px solid var(--nline);color:var(--nmuted-2)}

/* ---------- AI Đại cương (adults' programme): page, home band ---------- */
.dc-top .page-hero{grid-template-columns:minmax(0,1.15fr) minmax(360px,.85fr);gap:64px;padding-block:28px 56px;align-items:center}
.dc-top .page-hero::after{display:none}
.dc-hero .lead b{color:#fff;font-weight:600}
.dc-hero .actions{margin-top:30px;gap:14px}
.dc-ladder{position:relative;max-width:460px;margin-left:auto;padding:16px 18px 18px;border-radius:20px;background:rgba(11,31,61,.95);border:1px solid var(--nline-2);
  box-shadow:0 40px 80px -30px rgba(0,0,0,.85),0 0 0 6px rgba(47,212,196,.05);font-size:13px}
.dc-l-bar{display:flex;align-items:center;gap:12px;padding:0 104px 12px 0;border-bottom:1px solid var(--nline)}   /* room for the robot at the corner */
.dc-l-bar b{display:inline-flex;align-items:center;gap:7px;font:500 14px/1.2 var(--display);color:#fff}
.dc-l-bar b svg{width:14px;height:14px;color:var(--teal-b)}
.dc-l-bar em{margin-left:auto;padding:4px 7px;border:1px solid var(--nline-2);border-radius:5px;font:500 9.5px/1 var(--mono);letter-spacing:.12em;font-style:normal;text-transform:uppercase;color:var(--nmuted)}
.dc-l-list,.dc-band-tiers{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.dc-l-list{margin-top:12px}
.dc-l-list li{display:grid;grid-template-columns:30px minmax(0,1fr) 112px;grid-template-rows:auto auto;column-gap:12px;row-gap:6px;align-items:center;padding:11px 12px;border:1px solid var(--nline);border-radius:12px;background:rgba(255,255,255,.025)}
.dc-l-list li.on{border-color:rgba(47,212,196,.45);background:rgba(47,212,196,.06)}
.dc-l-list li>i{grid-row:1/span 2;display:grid;place-items:center;width:30px;height:30px;border-radius:50%;border:1px solid rgba(47,212,196,.55);color:var(--teal-b);font:500 11px/1 var(--mono);font-style:normal}
.dc-l-list li>div{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap}
.dc-l-list li>div b{font:500 14px/1.2 var(--display);color:#fff}
.dc-l-list li>div span{font:500 11px/1.2 var(--mono);color:var(--teal-b);letter-spacing:.02em}
.dc-l-list li>small{grid-column:3;grid-row:1;justify-self:end;font-size:11.5px;color:var(--nmuted);text-align:right}
.dc-l-list li>em{grid-column:2/span 2;grid-row:2;display:block;height:5px;border-radius:5px;background:rgba(255,255,255,.08);overflow:hidden}
.dc-l-list li>em::before{content:'';display:block;height:100%;width:var(--w);border-radius:5px;background:var(--grad)}
.dc-l-list li:last-child>em::before{background:linear-gradient(90deg,#5B9DFF,#E8A02C)}
.dc-l-foot{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:12px;padding-top:12px;border-top:1px solid var(--nline);color:var(--nmuted);font-size:12.5px}
.dc-bot{position:absolute;width:150px;height:auto;right:-26px;top:-78px;z-index:2;pointer-events:none;filter:drop-shadow(0 0 18px rgba(47,212,196,.45));animation:ai-float 3.4s ease-in-out infinite alternate}
.dc-stats{border-top-color:var(--nline)}
.dc-why .section-heading>p,.dc-aud-wrap .section-heading>p,.dc-mods-wrap .section-heading>p,.dc-packs .section-heading>p{max-width:440px}
.dc-compare{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.dc-compare article{position:relative;padding:28px 26px 30px;border:1px solid var(--line);border-radius:20px;background:#fff}
.dc-compare article.is-on{border-color:rgba(0,181,172,.45);background:linear-gradient(180deg,#F1FBF9,#fff 60%);box-shadow:var(--shadow)}
.dc-compare article.is-on::before{content:'';position:absolute;inset:-1px -1px auto -1px;height:4px;border-radius:20px 20px 0 0;background:var(--grad-ink)}
.dc-tag{display:inline-flex;align-items:center;min-height:26px;padding:4px 10px;border-radius:999px;background:var(--tint);border:1px solid var(--line);font:500 11px/1.2 var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.dc-compare article.is-on .dc-tag{background:var(--teal-soft);border-color:transparent;color:var(--teal-ink)}
.dc-compare h3{margin-top:16px;font-size:21px;line-height:1.3}
.dc-compare p{margin-top:12px;font-size:15px;line-height:1.65}
.dc-context{list-style:none;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;margin:48px 0 0;padding:28px 0 0;border-top:1px solid var(--line)}
.dc-context li{display:grid;gap:8px}
.dc-context b{font:500 13px/1.35 var(--mono);letter-spacing:.02em;color:var(--teal-ink)}
.dc-context span{font-size:14px;line-height:1.55;color:var(--muted)}
.dc-aud-wrap{background:var(--tint)}
.dc-aud{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.dc-aud article{padding:26px 24px 28px;border:1px solid var(--line);border-radius:20px;background:#fff}
.dc-aud .vi-ic{width:56px;height:56px}
.dc-aud h3{margin-top:18px;font-size:19px;line-height:1.35}
.dc-aud p{margin-top:10px;font-size:14.5px;line-height:1.62}
.dc-mods{list-style:none;margin:0;padding:0;display:grid;gap:12px;counter-reset:none}
.dc-mods li{display:grid;grid-template-columns:150px minmax(0,1fr);gap:28px;align-items:start;padding:26px 28px;border:1px solid var(--line);border-radius:20px;background:#fff}
.dc-mods li>i{font:500 12px/1.3 var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--teal-ink);font-style:normal;padding-top:6px}
.dc-mods h3{font-size:22px;line-height:1.3}
.dc-mods p{margin-top:8px;font-size:15.5px;line-height:1.68;max-width:70ch}
.dc-packs{padding-block:100px}
.dc-pack-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.dc-pack-grid article{position:relative;padding:28px 26px 30px;border:1px solid var(--nline-2);border-radius:20px;background:rgba(11,31,61,.72)}
.dc-pack-grid article.is-on{border-color:rgba(47,212,196,.5);background:rgba(47,212,196,.07);box-shadow:0 0 0 6px rgba(47,212,196,.05)}
.dc-pack-no{font:500 11px/1.3 var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--teal-b)}
.dc-pack-grid h3{margin-top:14px;font-size:28px}
.dc-pack-time{margin-top:6px;font:500 12px/1.4 var(--mono);color:#F2C979!important;letter-spacing:.03em}
.dc-pack-grid article>p:not(.dc-pack-time){margin-top:14px;font-size:15px;line-height:1.65}
.dc-pack-grid ul{list-style:none;margin:18px 0 0;padding:18px 0 0;border-top:1px solid var(--nline);display:grid;gap:10px}
.dc-pack-grid li{position:relative;padding-left:22px;font-size:14.5px;line-height:1.5;color:var(--nink)}
.dc-pack-grid li::before{content:'';position:absolute;left:0;top:9px;width:10px;height:10px;border-radius:50%;background:var(--grad)}
.dc-run-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);gap:64px;align-items:start}
.dc-run h2{margin-top:0;font-size:clamp(28px,2.6vw,38px)}
.dc-run p{margin-top:16px;font-size:16px;line-height:1.7}
.dc-run .vi-trust{margin-top:22px;padding:14px 16px;border-radius:12px;background:var(--tint);color:var(--ink)}
.dc-steps{list-style:none;margin:0;padding:0;display:grid;gap:12px}
.dc-steps li{display:grid;grid-template-columns:44px minmax(0,1fr);gap:18px;align-items:start;padding:20px 22px;border:1px solid var(--line);border-radius:18px;background:#fff}
.dc-steps li>i{display:grid;place-items:center;width:44px;height:44px;border-radius:50%;background:var(--grad);color:#04101F;font:600 15px/1 var(--display);font-style:normal}
.dc-steps h3{font-size:18px;line-height:1.3}
.dc-steps p{margin-top:6px;font-size:14.5px;line-height:1.6}
.dc-band{padding-block:0 100px}
.dc-band-card{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(300px,.7fr);gap:56px;align-items:center;padding:52px 56px;border-radius:28px;
  background:linear-gradient(120deg,#EAF7F4 0%,#E9F0FC 55%,#F2EEFB 100%);border:1px solid #D6E3EC}
.dc-band-card h2{font-size:clamp(28px,2.7vw,40px);max-width:16ch}
.dc-band-card p{margin-top:16px;font-size:16px;line-height:1.7;max-width:52ch}
.dc-band-card .actions{margin-top:28px;gap:20px}
.dc-band-tiers li{display:grid;grid-template-columns:32px minmax(0,1fr) auto;grid-template-rows:auto auto;column-gap:12px;row-gap:7px;align-items:center;padding:12px 14px;border-radius:14px;background:#fff;border:1px solid #D6E3EC}
.dc-band-tiers li.on{border-color:rgba(0,181,172,.5);box-shadow:0 14px 30px -18px rgba(14,26,43,.35)}
.dc-band-tiers li>i{grid-row:1/span 2;display:grid;place-items:center;width:32px;height:32px;border-radius:50%;border:1px solid rgba(0,181,172,.6);color:var(--teal-ink);font:500 11px/1 var(--mono);font-style:normal}
.dc-band-tiers li>div{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap}
.dc-band-tiers li>div b{font:500 15px/1.2 var(--display);color:var(--ink)}
.dc-band-tiers li>div span{font:500 11px/1.2 var(--mono);color:var(--teal-ink)}
.dc-band-tiers li>small{grid-column:3;grid-row:1;font-size:12px;color:var(--muted)}
.dc-band-tiers li>em{grid-column:2/span 2;grid-row:2;display:block;height:5px;border-radius:5px;background:#E3EBF3;overflow:hidden}
.dc-band-tiers li>em::before{content:'';display:block;height:100%;width:var(--w);border-radius:5px;background:var(--grad-ink)}
.dc-band-tiers li:last-child>em::before{background:linear-gradient(90deg,#1C5FD8,#E8A02C)}

/* ---------- Contact: offices ---------- */
.offices{padding-top:0}
.offices .section-heading>p{max-width:460px}
.office-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;max-width:900px}
.office{padding:28px 26px 30px;border:1px solid var(--line);border-radius:20px;background:#fff}
.office-ic{display:grid;place-items:center;width:64px;height:64px;border-radius:50%;background:var(--teal-soft);color:var(--ink)}
.office-ic svg{width:30px;height:30px}
.office h3{margin-top:18px;font-size:24px}
.office p{margin-top:10px;font-size:16px;line-height:1.75;color:var(--muted)}
.footer-offices{margin-top:10px;font-size:13px;color:var(--nmuted-2)!important}

/* ---------- language switch ---------- */
.main-nav{margin-left:auto}
.lang-switch{display:inline-flex;align-items:center;justify-content:center;min-height:34px;min-width:44px;padding:0 12px;border:1px solid var(--nline-2);border-radius:999px;
  font:500 12px/1 var(--mono);letter-spacing:.14em;color:#fff;flex:none}
.lang-switch:hover{border-color:var(--teal-b);color:var(--teal-b)}
html[lang=en] .dc-band-card h2{max-width:22ch}
html[lang=en] .ai-hero h1{font-size:clamp(38px,4vw,56px)}

/* ---------- lightbox ---------- */
.lightbox{border-radius:18px}
.lightbox::backdrop{background:rgba(6,20,42,.9)}

/* ---------- responsive ---------- */
@media(max-width:1100px){
  .brand,.footer-brand{width:186px}
  .ai-hero .ai-hero-grid{grid-template-columns:minmax(0,1fr) 430px;gap:40px}
  .ai-hero-vis{height:690px}
  .ai-console{width:350px;left:-16px}
  .ai-flip-grid{grid-template-columns:minmax(0,360px) minmax(0,1fr);gap:40px}
}
@media(min-width:861px) and (max-width:1100px){.main-nav{font-size:13px}.brand{width:168px}}
@media(max-width:860px){
  /* bigger tap areas on touch screens (the look stays the same) */
  .footer-top>div>a:not(.brand){min-height:40px;margin-top:2px}
  .breadcrumbs a{display:inline-flex;align-items:center;min-height:36px}
  .breadcrumbs{align-items:center}
  .ai-page-top .breadcrumbs,.suite-one .ai-page-top .breadcrumbs,.harness-page .ai-page-top .breadcrumbs{padding-top:14px}
  .main-nav,.main-nav.open{background:#06142A;border-bottom:1px solid var(--nline)}
  .main-nav{margin-left:0}
  .lang-switch{order:2;margin-left:auto;min-height:36px}
  .menu-toggle{order:3}
  .nav-dropdown,.nav-group:nth-last-of-type(-n+2) .nav-dropdown{background:rgba(255,255,255,.04);border:1px solid var(--nline);border-top:2px solid var(--teal-b);box-shadow:none}
  .main-nav>a[aria-current=page],.nav-group summary[aria-current=page]{text-decoration:none;color:var(--teal-b)}
  .ai-hero .ai-hero-grid{grid-template-columns:1fr;gap:44px;padding-block:44px 40px}
  .ai-hero-vis{height:auto;max-width:520px;width:100%;margin-inline:auto;display:flex;flex-direction:column}
  .ai-scene{position:relative;right:auto;top:auto;max-height:none}
  .ai-console{position:relative;left:auto;bottom:auto;width:auto;margin:-72px 12px 0}
  .ai-stats{grid-template-columns:1fr 1fr;row-gap:26px}
  .ai-stats>div:nth-child(3){padding-left:0;border-left:0}
  .ai-flip-grid{grid-template-columns:1fr;gap:40px;padding-block:72px}
  .ai-page-top .page-hero::after{width:300px;height:300px;right:-40px}
}
@media(max-width:600px){
  .brand,.footer-brand{width:178px}
  .ai-hero h1{font-size:34px}
  .ai-hero .lead{font-size:16px}
  .ai-hero .actions{flex-direction:column;align-items:stretch}
  .ai-hero .actions .button{width:100%}
  .ai-console{margin:-52px 6px 0;padding:12px}
  .ai-c-user{margin-left:20px}
  .ai-steps b em{display:none}
  .ai-stats b{font-size:34px}
  .ai-stats>div{padding:0 16px}
  .ai-stats span{font-size:13px}
  .product-card,.product-card.mint,.product-card.peach{border-radius:22px}
  .vi-pilot .news-empty{padding:26px 24px}
  .cta{border-radius:24px;padding-bottom:150px}
  .cta-robot{width:160px;height:160px;right:8px;bottom:-18px}
  .ai-flip h2{font-size:30px}
  .ai-flip .actions{flex-direction:column;align-items:flex-start}
  .ai-dock{flex-wrap:wrap}
  .ai-stage+.cta{margin-top:56px}
  .ai-page-top .page-hero{padding-block:22px 54px}
  .ai-page-top .page-hero h1{font-size:36px}
  .suite-banner{padding-bottom:52px}
  .h-banner{padding-bottom:48px}
}
@media(max-width:360px){
  .ai-hero h1{font-size:30px}
  html[lang=en] .ai-page-top .page-hero h1{font-size:34px}
}
@media(prefers-reduced-motion:reduce){
  .ai-caret{animation:none}
  .ai-bot{animation:none}
  .ci-grid article:hover,.product-card:hover,.ai-book:hover{transform:none}
}

/* AI Đại cương, narrow screens */
@media(max-width:1100px){
  .dc-top .page-hero{grid-template-columns:minmax(0,1fr) minmax(320px,.9fr);gap:40px}
  .dc-compare,.dc-context{grid-template-columns:repeat(3,minmax(0,1fr))}
  .dc-context{grid-template-columns:1fr 1fr}
  .dc-aud{grid-template-columns:1fr 1fr}
  .dc-run-grid{gap:40px}
  .dc-band-card{padding:40px;gap:36px}
}
@media(max-width:860px){
  .dc-top .page-hero{grid-template-columns:1fr;gap:40px;padding-block:22px 48px}
  .dc-ladder{max-width:520px;margin:0 auto}
  .dc-bot{width:96px;right:6px;top:-34px}
  .dc-l-bar{padding-right:92px}
  .dc-compare,.dc-pack-grid{grid-template-columns:1fr}
  .dc-mods li{grid-template-columns:1fr;gap:10px;padding:22px}
  .dc-run-grid{grid-template-columns:1fr}
  .dc-band-card{grid-template-columns:1fr;padding:34px 28px}
  .dc-band-tiers{max-width:520px}
  .dc-packs{padding-block:72px}
}
@media(max-width:600px){
  .dc-context{grid-template-columns:1fr;gap:16px;margin-top:36px}
  .office-grid{grid-template-columns:1fr}
  .office{padding:22px 20px 24px}
  .dc-aud{grid-template-columns:1fr}
  .dc-ladder{padding:14px 14px 16px}
  .dc-l-list li{grid-template-columns:28px minmax(0,1fr) 96px;padding:10px 10px}
  .dc-l-list li>small{font-size:11px}
  .dc-l-foot{flex-direction:column;align-items:flex-start}
  .dc-l-bar em{display:none}
  .dc-band{padding-bottom:56px}
  .dc-band-card{padding:28px 22px;border-radius:22px}
  .dc-band-card .actions{flex-direction:column;align-items:stretch}
  .dc-band-card .actions .button{width:100%}
  .dc-hero .actions{flex-direction:column;align-items:stretch}
  .dc-hero .actions .button{width:100%}
  .dc-compare article,.dc-aud article,.dc-pack-grid article{padding:22px 20px 24px}
  .dc-mods h3{font-size:20px}
  .dc-steps li{padding:16px}
}
@media(max-width:400px){
  .dc-l-list li{grid-template-columns:28px minmax(0,1fr);row-gap:6px}
  .dc-l-list li>small{display:none}
  .dc-l-list li>em{grid-column:2}
}