/* Trang gioi thieu Dorabot (/, /en/, /tools/, /about-us/) — 27/10/2026. Mau theo thuong hieu Dora. */
:root {
  /* Dorabot + Dora Tools = mau logo (xanh duong #0066FF + cam #FF9900); Dora hoc tap = xanh ngoc + cu (chi trong khoi Dora) */
  --brand: #0066FF; --brand-d: #0052CC; --brand-l: #EAF2FF; --accent: #FF9900;
  --teal: #2BB3A3; --teal-d: #1F9384; --teal-l: #E6F6F3;
  --amber: #FFB547; --amber-l: #FFF4E0; --orange: #FF8A3D;
  --ink: #1F2A44; --ink-2: #4A5672; --ink-3: #7A849A;
  --line: #E4E8EF; --bg: #FFFFFF; --bg-2: #F6F8FB;
  --r: 16px; --sh: 0 1px 2px rgba(31,42,68,.06), 0 8px 24px rgba(31,42,68,.06);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { margin: 0; font: 16px/1.6 'Be Vietnam Pro', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif; color: var(--ink); background: var(--bg); }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }
h1, h2, h3 { line-height: 1.25; margin: 0; letter-spacing: -.01em; }
.wrap { max-width: 1160px; margin: 0 auto; padding: 0 20px; }

/* Nut */
.btn { display: inline-flex; align-items: center; gap: 6px; background: var(--brand); color: #fff; font-weight: 600; border-radius: 999px; padding: 12px 22px; transition: background .15s; }
.btn:hover { background: var(--brand-d); }
.btn-sm { padding: 8px 16px; font-size: 14px; }

/* Thanh tren */
.top { position: sticky; top: 0; z-index: 20; background: rgba(255,255,255,.92); backdrop-filter: saturate(1.4) blur(8px); border-bottom: 1px solid var(--line); }
.top-in { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: inline-flex; align-items: center; gap: 8px; font-weight: 800; font-size: 20px; }
.brand img { display: block; }
.nav { display: flex; align-items: center; gap: 4px; }
.nav a { padding: 8px 12px; border-radius: 10px; font-weight: 500; font-size: 15px; color: var(--ink-2); }
.nav a:hover, .nav a.on { color: var(--ink); background: var(--bg-2); }
.nav a.btn { color: #fff; margin-left: 8px; }
.nav a.btn:hover { background: var(--brand-d); }
.nav a { white-space: nowrap; }
.nav a.lang { display: inline-flex; align-items: center; gap: 6px; color: var(--ink-2); }
.flag { width: 20px; height: 14px; border-radius: 2px; box-shadow: 0 0 0 1px rgba(31,42,68,.12); flex: none; display: block; }
.lang-f { display: inline-flex; align-items: center; gap: 8px; }
.menu-btn { display: none; background: none; border: 0; padding: 10px; cursor: pointer; }
.menu-btn span { display: block; width: 22px; height: 2px; background: var(--ink); margin: 4px 0; border-radius: 2px; }

/* Hero */
.hero { background: linear-gradient(180deg, var(--brand-l) 0%, #fff 100%); padding: 56px 0 40px; }
.hero-in { display: grid; grid-template-columns: 1.15fr .85fr; gap: 40px; align-items: center; }
.eyebrow { color: var(--brand); font-weight: 600; font-size: 14px; margin: 0 0 12px; }
.hero h1 { font-size: clamp(30px, 4.4vw, 48px); font-weight: 800; }
.hero h1 em { font-style: normal; color: var(--brand); }
.lead { font-size: 18px; color: var(--ink-2); margin: 16px 0 24px; max-width: 34em; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.chips a { background: #fff; border: 1px solid var(--line); border-radius: 999px; padding: 6px 14px; font-size: 14px; font-weight: 500; color: var(--ink-2); }
.chips a:hover { border-color: var(--brand); color: var(--brand); }
.chips a.chip-dora { background: var(--amber-l); border-color: #FFE0A8; color: #8A5A00; }

.hero-art { position: relative; height: 340px; }
.art-card { position: absolute; display: grid; grid-template-columns: 44px 1fr; grid-template-rows: auto auto; column-gap: 12px; align-items: center; background: #fff; border-radius: var(--r); box-shadow: var(--sh); padding: 14px 18px; min-width: 210px; }
.art-card .tool-ic { grid-row: span 2; }
.art-card b { font-size: 15px; }
.art-card small { color: var(--ink-3); font-size: 13px; }
/* logo ben trai, 3 the cong cu xep ben phai */
.art-card { z-index: 1; }
.art-a { top: 22px; right: 30px; }
.art-b { top: 138px; right: -6px; }
.art-c { top: 254px; right: 46px; }
.art-logo { position: absolute; left: 30px; top: 50%; width: 160px; height: 160px; margin-top: -80px; filter: drop-shadow(0 14px 28px rgba(0,102,255,.25)); }
.art-ring { position: absolute; left: -10px; top: 50%; width: 240px; height: 240px; margin-top: -120px; border-radius: 50%; border: 2px dashed #BFD6FF; }

/* Tim kiem */
.search { position: relative; max-width: 560px; }
.search input { width: 100%; font: inherit; font-size: 16px; padding: 14px 18px 14px 46px; border: 1.5px solid var(--line); border-radius: 14px; background: #fff url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' fill='none' stroke='%237A849A' stroke-width='2' stroke-linecap='round'%3E%3Ccircle cx='9' cy='9' r='6'/%3E%3Cpath d='m14 14 4 4'/%3E%3C/svg%3E") no-repeat 16px center; box-shadow: var(--sh); outline: none; }
.search input:focus { border-color: var(--brand); }
.search-list { position: absolute; z-index: 10; left: 0; right: 0; top: calc(100% + 6px); background: #fff; border: 1px solid var(--line); border-radius: 14px; box-shadow: var(--sh); padding: 6px; max-height: 360px; overflow: auto; }
.search-list a { display: flex; gap: 10px; align-items: center; padding: 8px 10px; border-radius: 10px; }
.search-list a:hover, .search-list a.act { background: var(--bg-2); }
.search-list .tool-ic { width: 32px; height: 32px; font-size: 15px; border-radius: 9px; }
.search-list small { display: block; color: var(--ink-3); font-size: 13px; line-height: 1.4; }
.search-empty { color: var(--ink-3); font-size: 14px; margin: 8px 4px 0; }
.search-list .search-empty { margin: 6px 10px; }

/* So lieu */
.stats { padding: 28px 0 8px; }
.stats-row { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.stats-row li { background: var(--bg-2); border-radius: var(--r); padding: 18px 20px; }
.stats-row b { display: block; font-size: clamp(22px, 3vw, 30px); font-weight: 800; color: var(--ink); }
.stats-row span { color: var(--ink-2); font-size: 14px; }
.src { color: var(--ink-3); font-size: 12.5px; margin: 10px 2px 0; }

/* Muc chung */
section { scroll-margin-top: 72px; }
.sec-h { font-size: clamp(24px, 3vw, 32px); font-weight: 800; }
.sec-top { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; margin-bottom: 20px; }
.more { color: var(--brand); font-weight: 600; white-space: nowrap; }
.lines, .tools-sec, .dora-sec, .why { padding: 48px 0; }

/* 2 dong san pham */
.lines .sec-h { margin-bottom: 20px; }
.lines-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.line { position: relative; overflow: hidden; border-radius: 20px; padding: 28px; min-height: 220px; display: flex; flex-direction: column; gap: 10px; transition: transform .15s, box-shadow .15s; }
.line:hover { transform: translateY(-2px); box-shadow: var(--sh); }
.line-tools { background: var(--brand); color: #fff; }
.line-tools p { color: #DCE8FF; max-width: 30em; padding-right: 90px; }
.line-dora { background: var(--amber-l); }
.line-dora p { color: var(--ink-2); max-width: 30em; padding-right: 90px; }
.line-tag { align-self: flex-start; font-size: 13px; font-weight: 700; letter-spacing: .02em; padding: 4px 10px; border-radius: 999px; background: rgba(255,255,255,.14); }
.line-dora .line-tag { background: #fff; color: #8A5A00; }
.line h3 { font-size: 22px; }
.line p { margin: 0; }
.line-go { margin-top: auto; font-weight: 700; color: #fff; }
.line-dora .line-go { color: var(--teal-d); }
.line-img { position: absolute; right: 18px; bottom: 14px; width: 96px; height: auto; }
.line-logo { width: 84px; background: #fff; border-radius: 50%; padding: 4px; }

/* The cong cu */
.groups { display: grid; grid-template-columns: 1fr 1fr; gap: 28px 24px; }
.tools-sec .tool-list { grid-template-columns: 1fr 1fr; }
.group h3 { font-size: 17px; margin-bottom: 10px; }
.tool-list { display: grid; gap: 8px; }
.tool { display: flex; gap: 12px; align-items: flex-start; padding: 12px 14px; border: 1px solid var(--line); border-radius: 14px; background: #fff; transition: border-color .15s, box-shadow .15s; }
.tool:hover { border-color: var(--brand); box-shadow: var(--sh); }
.tool-tx b { display: block; font-size: 15px; font-weight: 600; }
.tool-tx small { display: block; color: var(--ink-3); font-size: 13.5px; line-height: 1.45; margin-top: 2px; }
.tool-ic { flex: none; display: inline-grid; place-items: center; width: 40px; height: 40px; border-radius: 11px; font-weight: 800; font-size: 18px; background: var(--bg-2); color: var(--ink); }
.tool-ban-hang, .tool-codes { background: #E8F0FF; color: #2E5BD8; }
.tool-tai-lieu, .tool-pdf { background: #FFECE5; color: #D2491C; }
.tool-anh, .tool-image { background: #F1EAFE; color: #6B3FD1; }
.tool-vui, .tool-fun { background: var(--amber-l); color: #A86A00; }
.tool-hang-ngay { background: #EAF6EA; color: #2F8A3A; }
.tool-hoc { background: var(--teal-l); color: var(--teal-d); }

/* Dora hoc tap: giu xanh ngoc + cu */
.dora-sec { background: var(--teal-l); }
.dora-head { display: flex; gap: 18px; align-items: center; margin-bottom: 24px; }
.dora-head p { margin: 6px 0 0; color: var(--ink-2); }
/* 2 nhom: gia dinh & nguoi hoc (2x2) | thay co & trung tam (2 the doc) */
.dora-grps { display: grid; grid-template-columns: 2fr 1fr; gap: 24px; }
.dora-grp h3 { font-size: 15px; font-weight: 700; color: var(--teal-d); text-transform: uppercase; letter-spacing: .04em; margin-bottom: 10px; }
.prod-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.dora-grp-school .prod-grid { grid-template-columns: 1fr; }
.prod-tx { display: flex; flex-direction: column; gap: 3px; min-width: 0; }
.prod { display: flex; flex-direction: row; align-items: flex-start; gap: 14px; background: #fff; border-radius: var(--r); padding: 18px; border: 1px solid var(--line); transition: border-color .15s, transform .15s; }
.prod:hover { border-color: var(--teal); transform: translateY(-2px); }
.prod img { width: 48px; height: 48px; border-radius: 12px; flex: none; }
.prod b { font-size: 16px; }
.prod-for { color: var(--teal-d); font-size: 13px; font-weight: 600; }
.prod small { color: var(--ink-2); font-size: 13.5px; line-height: 1.5; }
.try { display: flex; gap: 14px; align-items: center; margin-top: 18px; background: #fff; border: 1.5px dashed #9FDCD3; border-radius: var(--r); padding: 16px 18px; }
.try b { display: block; }
.try small { display: block; color: var(--ink-2); font-size: 14px; }
.try-go { margin-left: auto; white-space: nowrap; font-weight: 700; color: var(--teal-d); }

/* Vi sao */
.why-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.why h3 { font-size: 18px; margin-bottom: 6px; }
.why p { margin: 0; color: var(--ink-2); }

/* Trang /tools/ */
.page-hero { background: linear-gradient(180deg, var(--brand-l) 0%, #fff 100%); padding: 44px 0 28px; }
.page-hero h1 { font-size: clamp(28px, 4vw, 42px); font-weight: 800; }
.page-hero .lead { margin: 12px 0 20px; }
.filters { display: flex; flex-wrap: wrap; gap: 8px; margin: 24px 0 8px; }
.filters button { font: inherit; font-size: 14px; font-weight: 500; border: 1px solid var(--line); background: #fff; color: var(--ink-2); border-radius: 999px; padding: 7px 14px; cursor: pointer; }
.filters button.on { background: var(--brand); color: #fff; border-color: var(--brand); }
.cat { padding: 24px 0 8px; }
.cat h2 { font-size: 20px; margin-bottom: 12px; }
.cat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.cat-note { color: var(--ink-2); font-size: 14px; margin: -4px 0 12px; }

/* Trang about */
.prose > * { max-width: 780px; }
.prose > .facts { max-width: none; }
.prose p { color: var(--ink-2); font-size: 17px; }
.prose h2 { font-size: 24px; margin: 40px 0 12px; }
.facts { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 16px 0; }
.fact { background: var(--bg-2); border-radius: var(--r); padding: 18px 20px; }
.fact b { display: block; font-size: 17px; margin-bottom: 4px; }
.fact span { color: var(--ink-2); font-size: 15px; }
.prose ul { padding-left: 20px; color: var(--ink-2); font-size: 17px; }
.prose li { margin: 6px 0; }
.prose a { color: var(--brand); font-weight: 600; }

/* Landing Dora Tools: /tools/ + 4 trang con /tools/<nhom>/ (helpers/tools_landing.php) */
.tl-sec { padding: 48px 0; }
.tl-alt { background: var(--bg-2); }
.sec-lead { color: var(--ink-2); margin: 8px 0 20px; max-width: 40em; }
.tl-hero .hero-tx .search { margin-top: 4px; }
.hero-btns, .final-btns { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 4px; }
.btn-lg { padding: 14px 26px; font-size: 16.5px; }
.btn-ghost { background: #fff; color: var(--brand); border: 1.5px solid #BFD6FF; }
.btn-ghost:hover { background: var(--brand-l); }
.crumbs { display: flex; gap: 8px; align-items: center; font-size: 14px; color: var(--ink-3); margin-bottom: 12px; }
.crumbs a { color: var(--brand); font-weight: 600; }
.art-emoji { position: absolute; left: 50px; top: 50%; margin-top: -60px; width: 120px; height: 120px; display: grid; place-items: center; font-size: 64px; background: #fff; border-radius: 50%; box-shadow: 0 14px 28px rgba(0,102,255,.18); }
/* 4 the doi tuong */
.aud-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.aud-grid-3 { grid-template-columns: repeat(3, 1fr); }
.aud { display: flex; flex-direction: column; gap: 6px; padding: 22px; border-radius: 18px; border: 1px solid var(--line); background: #fff; transition: transform .15s, box-shadow .15s, border-color .15s; }
.aud:hover { transform: translateY(-2px); box-shadow: var(--sh); border-color: var(--brand); }
.aud-ic { width: 48px; height: 48px; border-radius: 14px; display: grid; place-items: center; font-size: 24px; margin-bottom: 6px; }
.aud-ban-hang .aud-ic { background: #E8F0FF; }
.aud-tai-lieu .aud-ic { background: #FFECE5; }
.aud-hoc .aud-ic { background: var(--teal-l); }
.aud-vui .aud-ic { background: var(--amber-l); }
.aud b { font-size: 18px; }
.aud small { color: var(--ink-2); font-size: 14px; line-height: 1.5; }
.aud-go { margin-top: auto; padding-top: 8px; color: var(--brand); font-weight: 700; font-size: 14.5px; }
/* 6 cong cu noi bat */
.feat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.feat { display: flex; flex-direction: column; gap: 8px; padding: 20px; border-radius: 18px; background: #fff; border: 1px solid var(--line); transition: transform .15s, box-shadow .15s, border-color .15s; }
.feat:hover { transform: translateY(-2px); box-shadow: var(--sh); border-color: var(--brand); }
.feat-top { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.feat-tag { font-size: 12.5px; font-weight: 600; color: var(--ink-3); }
.feat b { font-size: 18px; }
.feat ul { list-style: none; margin: 0; padding: 0; }
.feat li { position: relative; padding-left: 22px; color: var(--ink-2); font-size: 14.5px; margin: 4px 0; }
.feat li::before { content: '✓'; position: absolute; left: 0; color: var(--brand); font-weight: 800; }
.feat-go { margin-top: auto; padding-top: 6px; color: var(--brand); font-weight: 700; font-size: 14.5px; }
.feat[data-dora] li::before, .feat[data-dora] .feat-go { color: var(--teal-d); }
/* 3 buoc */
.steps3 { list-style: none; counter-reset: st; margin: 20px 0 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.steps3 li { counter-increment: st; background: var(--bg-2); border-radius: 18px; padding: 22px 22px 22px 70px; position: relative; }
.steps3 li::before { content: counter(st); position: absolute; left: 20px; top: 20px; width: 36px; height: 36px; border-radius: 50%; background: var(--brand); color: #fff; font-weight: 800; display: grid; place-items: center; }
.steps3 b { display: block; font-size: 17px; margin-bottom: 4px; }
.steps3 span { color: var(--ink-2); font-size: 14.5px; }
/* Viec lam duoc (trang con) */
.uses { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin-top: 20px; }
.use { position: relative; display: flex; flex-direction: column; gap: 6px; padding: 22px 22px 20px 70px; border-radius: 18px; border: 1px solid var(--line); background: #fff; transition: box-shadow .15s, border-color .15s; }
.use:hover { box-shadow: var(--sh); border-color: var(--brand); }
.use-n { position: absolute; left: 20px; top: 20px; width: 36px; height: 36px; border-radius: 12px; background: var(--brand-l); color: var(--brand); font-weight: 800; display: grid; place-items: center; }
.use b { font-size: 17px; }
.use small { color: var(--ink-2); font-size: 14.5px; line-height: 1.55; }
.use-go { display: inline-flex; align-items: center; gap: 8px; margin-top: 6px; font-weight: 700; font-size: 14.5px; color: var(--brand); }
.use-go .tool-ic { width: 28px; height: 28px; font-size: 13px; border-radius: 8px; }
.tl-grid { margin-top: 16px; }
/* Danh muc day du trong /tools/ */
#tat-ca .filters { margin-top: 16px; }
.tl-search { margin-top: 16px; }
.cat-h { font-size: 19px; margin-bottom: 12px; }
/* FAQ */
.faq { margin-top: 18px; display: grid; gap: 10px; max-width: 860px; }
.faq details { border: 1px solid var(--line); border-radius: 14px; background: #fff; padding: 0 18px; }
.faq summary { cursor: pointer; list-style: none; padding: 16px 28px 16px 0; font-weight: 600; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: '+'; position: absolute; right: 0; top: 13px; font-size: 22px; color: var(--ink-3); }
.faq details[open] summary::after { content: '–'; }
.faq p { margin: 0 0 16px; color: var(--ink-2); }
/* Dai sang Dora hoc tap */
.dora-strip { display: flex; align-items: center; gap: 16px; padding: 20px 22px; border-radius: 18px; background: var(--teal-l); border: 1px solid #BFE6DF; }
.dora-strip img { flex: none; border-radius: 14px; }
.dora-strip b { display: block; font-size: 17px; }
.dora-strip small { display: block; color: var(--ink-2); font-size: 14.5px; }
.dora-strip-go { margin-left: auto; white-space: nowrap; font-weight: 700; color: var(--teal-d); }
/* Keu goi cuoi trang */
.final { text-align: center; background: var(--brand); color: #fff; border-radius: 24px; padding: 40px 24px; }
.final h2 { font-size: clamp(22px, 3vw, 30px); }
.final p { color: #DCE8FF; margin: 10px auto 20px; max-width: 34em; }
.final-btns { justify-content: center; }
.final .btn { background: #fff; color: var(--brand); }
.final .btn:hover { background: var(--brand-l); }
.final .btn-ghost { background: transparent; color: #fff; border-color: rgba(255,255,255,.5); }
.final .btn-ghost:hover { background: rgba(255,255,255,.1); }
@media (max-width: 1100px) {
  .art-emoji { left: 50%; margin-left: -60px; }
}
@media (max-width: 980px) {
  .aud-grid { grid-template-columns: 1fr 1fr; }
  .feat-grid { grid-template-columns: 1fr 1fr; }
  .steps3 { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .tl-sec { padding: 36px 0; }
  .aud-grid, .aud-grid-3 { grid-template-columns: 1fr 1fr; gap: 10px; }
  .aud { padding: 14px; }
  .aud-ic { width: 40px; height: 40px; font-size: 20px; }
  .aud b { font-size: 15.5px; line-height: 1.3; }
  .aud small { font-size: 13px; }
  .feat-grid, .uses { grid-template-columns: 1fr; }
  .use { padding: 18px 18px 18px 62px; }
  .use-n { left: 16px; top: 18px; }
  .hero-btns .btn { flex: 1 1 auto; justify-content: center; }
  .dora-strip { flex-wrap: wrap; }
  .dora-strip-go { margin-left: 72px; }
  .final { padding: 32px 18px; }
}

/* Chan trang */
.foot { background: var(--ink); color: #C9D2E3; padding: 48px 0 20px; margin-top: 24px; font-size: 14.5px; }
.foot-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 28px; }
.foot .brand { color: #fff; }
.foot .brand img { background: #fff; border-radius: 50%; }
.foot h3 { color: #fff; font-size: 15px; margin-bottom: 10px; }
.foot ul { list-style: none; margin: 0; padding: 0; }
.foot li { margin: 6px 0; }
.foot a:hover { color: #fff; }
.foot-brand p { margin: 10px 0 0; }
.foot-bot { border-top: 1px solid rgba(255,255,255,.1); margin-top: 32px; padding-top: 16px; color: #8E99B0; font-size: 13px; }

/* Man hinh vua: khung hero chi con logo (the cong cu can >= 1100px) */
@media (max-width: 1100px) {
  .hero-in { grid-template-columns: 1fr 200px; }
  .hero-art { height: 220px; }
  .art-card { display: none; }
  .art-ring { left: 50%; margin-left: -110px; width: 220px; height: 220px; margin-top: -110px; }
  .art-logo { left: 50%; margin-left: -70px; width: 140px; height: 140px; margin-top: -70px; }
}
/* Menu tren: chuyen sang nut 3 gach tu 900px (4 muc + nut dai khong vua) */
@media (max-width: 900px) {
  .menu-btn { display: block; }
  .nav { display: none; position: absolute; top: 64px; left: 0; right: 0; background: #fff; border-bottom: 1px solid var(--line); flex-direction: column; align-items: stretch; padding: 8px 16px 16px; gap: 2px; box-shadow: 0 12px 24px rgba(31,42,68,.08); }
  .nav.open { display: flex; }
  .nav a { padding: 12px; }
  .nav a.btn { margin: 8px 0 0; justify-content: center; }
}
@media (max-width: 980px) {
  .cat-grid { grid-template-columns: 1fr 1fr; }
  .dora-grps { grid-template-columns: 1fr; }
  .dora-grp-school .prod-grid { grid-template-columns: 1fr 1fr; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
}
/* Dien thoai */
@media (max-width: 720px) {
  .wrap { padding: 0 16px; }
  .hero-in { grid-template-columns: 1fr; }
  .hero-art { display: none; }
  .hero { padding: 32px 0 24px; }
  .lead { font-size: 16px; }
  .chips { gap: 6px; }
  .chips a { font-size: 13px; padding: 5px 11px; }
  .stats-row { grid-template-columns: 1fr 1fr; }
  .lines-grid, .groups, .cat-grid, .why-grid, .facts { grid-template-columns: 1fr; }
  /* the Dora gon 2 cot, bo mo ta cho do dai */
  .prod-grid, .dora-grp-school .prod-grid { grid-template-columns: 1fr 1fr; gap: 8px; }
  .prod { padding: 12px; gap: 10px; align-items: center; }
  .prod img { width: 36px; height: 36px; border-radius: 10px; }
  .prod b { font-size: 14.5px; line-height: 1.3; }
  .prod-for { font-size: 12px; line-height: 1.35; }
  .prod small { display: none; }
  .dora-head { gap: 12px; }
  .dora-head p { font-size: 15px; }
  /* trang chu: the cong cu gon 2 cot, bo mo ta cho do dai */
  .tools-sec .tool-list { grid-template-columns: 1fr 1fr; }
  .tools-sec .tool { padding: 10px; gap: 8px; align-items: center; }
  .tools-sec .tool small { display: none; }
  .tools-sec .tool-tx b { font-size: 14px; line-height: 1.3; }
  .tools-sec .tool-ic { width: 34px; height: 34px; font-size: 15px; }
  .lines, .tools-sec, .dora-sec, .why { padding: 36px 0; }
  .line { padding: 22px; min-height: 0; }
  .line-img { width: 72px; }
  .line-dora p { padding-right: 60px; }
  .try { flex-wrap: wrap; }
  .try-go { margin-left: 54px; }
  .dora-head img { width: 64px; height: 64px; }
  .foot-grid { grid-template-columns: 1fr; gap: 20px; }
}

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