/* ==========================================================================
   Điện lực Hùng Vương – suadien365.vn
   CSS thuần, mobile-first, không phụ thuộc framework (nhẹ cho PageSpeed)
   Màu lấy từ logo (xanh điện lực) + xanh lá năng lượng sạch
   ========================================================================== */
:root {
    --navy: #0E2A5C;
    --blue: #1E4F9C;
    --blue-600: #17427F;
    --blue-50: #EAF1FB;
    --green: #1F9D5B;
    --green-600: #188049;
    --green-50: #E7F6EE;
    --amber: #F5B400;
    --ink: #13203B;
    --muted: #5B6880;
    --line: #DCE3EE;
    --bg: #FFFFFF;
    --tint: #F4F7FB;
    --radius: 14px;
    --radius-sm: 10px;
    --shadow: 0 10px 30px -12px rgba(14, 42, 92, .22);
    --shadow-sm: 0 4px 14px -6px rgba(14, 42, 92, .18);
    --container: 1200px;
    --header-h: 76px;
    --font: "Be Vietnam Pro", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { margin: 0; font-family: var(--font); font-size: 16px; line-height: 1.65; color: var(--ink); background: var(--bg); overflow-x: hidden; overflow-wrap: break-word; }
@supports (overflow-x: clip) { body { overflow-x: clip; } }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--blue); text-decoration: none; }
a:hover { color: var(--blue-600); }
h1, h2, h3, h4 { line-height: 1.25; margin: 0 0 .6em; color: var(--navy); font-weight: 700; }
p { margin: 0 0 1em; }
ul, ol { margin: 0; padding: 0; }
button { font: inherit; cursor: pointer; }
:focus-visible { outline: 3px solid var(--amber); outline-offset: 2px; }

.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 16px; }
.skip-link { position: absolute; left: -999px; top: 8px; background: var(--navy); color: #fff; padding: 8px 14px; border-radius: 8px; z-index: 1000; }
.skip-link:focus { left: 8px; }

.ic { width: 1.15em; height: 1.15em; flex: none; vertical-align: -.2em; }
.ic--lg { width: 1.6em; height: 1.6em; }

/* ---------- Buttons ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: .5em; padding: .8em 1.4em; border-radius: var(--radius-sm); border: 2px solid transparent; font-weight: 600; font-size: .98rem; line-height: 1.2; transition: background .2s, color .2s, border-color .2s, transform .2s; white-space: nowrap; }
.btn:hover { transform: translateY(-1px); }
.btn--primary { background: var(--blue); color: #fff; }
.btn--primary:hover { background: var(--blue-600); color: #fff; }
.btn--accent { background: var(--green); color: #fff; }
.btn--accent:hover { background: var(--green-600); color: #fff; }
.btn--outline { border-color: var(--blue); color: var(--blue); background: transparent; }
.btn--outline:hover { background: var(--blue); color: #fff; }
.btn--ghost { border-color: rgba(255,255,255,.6); color: #fff; background: rgba(255,255,255,.08); }
.btn--ghost:hover { background: #fff; color: var(--navy); }
.btn--light { background: #fff; color: var(--navy); }
.btn--light:hover { background: var(--blue-50); color: var(--navy); }
.btn--zalo { background: #0068FF; color: #fff; }
.btn--zalo:hover { background: #0054cc; color: #fff; }
.btn--block { display: flex; width: 100%; }
.link-arrow { display: inline-flex; align-items: center; gap: .4em; font-weight: 600; }
.link-arrow .ic { transition: transform .2s; }
.link-arrow:hover .ic { transform: translateX(4px); }

/* ---------- Topbar & Header ---------- */
.topbar { background: var(--navy); color: #C9D6EE; font-size: .85rem; display: none; }
.topbar__inner { display: flex; justify-content: space-between; align-items: center; height: 38px; gap: 16px; }
.topbar a { color: #fff; margin-left: 20px; }
.topbar .ic { color: var(--amber); }

.header { position: sticky; top: 0; z-index: 100; background: #fff; border-bottom: 1px solid var(--line); }
.header.is-scrolled { box-shadow: var(--shadow-sm); }
.header__inner { display: flex; align-items: center; justify-content: space-between; height: var(--header-h); gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--navy); min-width: 0; }
.brand img { width: 48px; height: 48px; }
.brand__text { display: flex; flex-direction: column; line-height: 1.15; }
.brand__name { font-weight: 800; font-size: clamp(.92rem, 4.4vw, 1.12rem); white-space: nowrap; letter-spacing: -.01em; color: var(--blue); text-transform: uppercase; }
.brand__sub { font-size: .78rem; color: var(--green); font-weight: 600; }

.burger { display: inline-flex; flex: none; background: none; border: 0; color: var(--navy); padding: 8px; margin-right: -8px; }

.nav { position: fixed; top: var(--header-h); left: 0; right: 0; height: calc(100vh - var(--header-h)); height: calc(100dvh - var(--header-h)); z-index: 99; background: #fff; padding: 8px 16px 32px; overflow-y: auto; overscroll-behavior: contain; display: flex; flex-direction: column; gap: 20px; visibility: hidden; opacity: 0; transform: translateY(-10px); transition: opacity .25s ease, transform .25s ease, visibility 0s linear .25s; }
.nav.is-open { visibility: visible; opacity: 1; transform: none; transition: opacity .25s ease, transform .25s ease, visibility 0s; }
.nav__list { list-style: none; }
.nav__list > li { position: relative; border-bottom: 1px solid var(--line); display: flex; flex-wrap: wrap; align-items: center; }
.nav__list > li > a { flex: 1; display: block; padding: 15px 4px; color: var(--ink); font-weight: 600; font-size: 1.05rem; }
.nav__list a.active { color: var(--blue); }
.sub-toggle { background: none; border: 0; padding: 12px 14px; color: var(--muted); }
.sub-toggle .ic { transition: transform .2s; }
.sub-toggle[aria-expanded="true"] .ic { transform: rotate(180deg); }
.sub { list-style: none; width: 100%; display: none; padding: 0 0 10px 10px; margin-top: -4px; }
.has-sub.is-open .sub { display: block; }
.sub a { display: flex; gap: 10px; align-items: center; padding: 10px 4px; color: var(--ink); }
.sub .ic { color: var(--green); }
.nav__cta { align-self: stretch; }
body.nav-open { overflow: hidden; }
body.nav-open .float-actions, body.nav-open .to-top { display: none; }

/* ---------- Page banner & breadcrumb ---------- */
.page-banner { position: relative; background: linear-gradient(120deg, var(--navy) 0%, var(--blue) 70%, #2563B8 100%); color: #fff; padding: 44px 0 40px; overflow: hidden; }
.page-banner::after { content: ""; position: absolute; right: -60px; bottom: -80px; width: 380px; height: 380px; background: url("/images/pattern-tower.svg") no-repeat center/contain; opacity: .12; pointer-events: none; }
.page-banner__title { color: #fff; font-size: clamp(1.6rem, 4vw, 2.4rem); margin: 8px 0 6px; max-width: 900px; }
.page-banner__sub { color: #D3DEF2; margin: 0; max-width: 760px; }
.breadcrumb ol { list-style: none; display: flex; flex-wrap: wrap; gap: 6px; font-size: .88rem; color: #B9C9E6; }
.breadcrumb li + li::before { content: "›"; margin-right: 6px; color: #8FA5CC; }
.breadcrumb a { color: #fff; }

/* ---------- Sections ---------- */
.section { padding: 56px 0; }
.section--tint { background: var(--tint); }
.section__head { text-align: center; max-width: 720px; margin: 0 auto 32px; }
.section__head p { color: var(--muted); }
.section__head--row { text-align: left; max-width: none; display: flex; flex-wrap: wrap; justify-content: space-between; align-items: flex-end; gap: 12px; }
.section__title { font-size: clamp(1.5rem, 3.4vw, 2.15rem); letter-spacing: -.015em; }
.eyebrow { display: inline-flex; align-items: center; gap: 6px; font-size: .8rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--green); margin-bottom: 8px; }
.eyebrow--light { color: #8DE0B4; }
.lead { font-size: 1.08rem; color: var(--muted); }
.note { font-size: .85rem; color: var(--muted); }
.empty { text-align: center; color: var(--muted); padding: 32px 0; }

.grid { display: grid; gap: 20px; grid-template-columns: 1fr; }

.card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow-sm); }
.card__title { display: flex; align-items: center; gap: 10px; font-size: 1.2rem; }
.card__title .ic { color: var(--green); }

/* ---------- Hero slider ---------- */
.hero { position: relative; background: var(--navy); color: #fff; }
.hero__slides { position: relative; min-height: 500px; }
.hero__slide { position: absolute; inset: 0; display: flex; align-items: center; opacity: 0; visibility: hidden; transition: opacity .8s ease, visibility .8s; }
.hero__slide.is-active { opacity: 1; visibility: visible; position: relative; min-height: 500px; }
.hero__bg { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.hero__slide::before { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(14,42,92,.92) 0%, rgba(14,42,92,.72) 55%, rgba(14,42,92,.25) 100%); z-index: 1; }
.hero__content { position: relative; z-index: 2; padding-top: 40px; padding-bottom: 72px; }
.hero__content .eyebrow { color: var(--amber); }
.hero__title { color: #fff; font-size: clamp(1.9rem, 5.2vw, 3.3rem); font-weight: 800; max-width: 760px; letter-spacing: -.02em; }
.hero__sub { font-size: clamp(1rem, 2vw, 1.18rem); color: #D7E2F5; max-width: 620px; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.hero__dots { position: absolute; left: 0; right: 0; bottom: 24px; z-index: 3; display: flex; justify-content: center; gap: 10px; }
.hero__dots button { width: 12px; height: 12px; border-radius: 99px; border: 0; background: rgba(255,255,255,.45); padding: 0; transition: width .3s, background .3s; }
.hero__dots button.is-active { width: 34px; background: var(--amber); }

/* ---------- Highlights ---------- */
.highlights { background: #fff; border-bottom: 1px solid var(--line); }
.highlights__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0; }
.hl { display: flex; gap: 10px; align-items: flex-start; padding: 18px 6px; line-height: 1.35; }
.hl > .ic { width: 36px; height: 36px; color: var(--blue); background: var(--blue-50); border-radius: 10px; padding: 7px; }
.hl strong { display: block; color: var(--navy); font-size: .95rem; }
.hl span { display: block; margin-top: 2px; font-size: .82rem; color: var(--muted); }

/* ---------- About short ---------- */
.about-short { display: grid; gap: 36px; align-items: center; }
.about-short__media { position: relative; }
.about-short__media img { border-radius: var(--radius); box-shadow: var(--shadow); }
.about-short__badge { position: absolute; left: 16px; bottom: -18px; background: var(--green); color: #fff; padding: 14px 18px; border-radius: var(--radius-sm); box-shadow: var(--shadow); display: flex; align-items: center; gap: 10px; }
.about-short__badge strong { font-size: 2rem; line-height: 1; }
.about-short__badge span { font-size: .85rem; line-height: 1.2; max-width: 80px; }
.checklist { list-style: none; margin: 0 0 24px; display: grid; gap: 10px; }
.checklist li { display: flex; gap: 10px; align-items: flex-start; }
.checklist .ic { color: #fff; background: var(--green); border-radius: 50%; padding: 3px; width: 22px; height: 22px; margin-top: 2px; }

/* ---------- Service cards ---------- */
.svc-card { position: relative; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 28px 24px; transition: transform .25s, box-shadow .25s, border-color .25s; overflow: hidden; display: flex; flex-direction: column; }
.svc-card::after { content: ""; position: absolute; left: 0; right: 0; top: 0; height: 4px; background: linear-gradient(90deg, var(--blue), var(--green)); transform: scaleX(0); transform-origin: left; transition: transform .3s; }
.svc-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: transparent; }
.svc-card:hover::after { transform: scaleX(1); }
.svc-card__icon { width: 64px; height: 64px; border-radius: 16px; display: grid; place-items: center; background: var(--blue-50); color: var(--blue); margin-bottom: 18px; transition: background .25s, color .25s; }
.svc-card:hover .svc-card__icon { background: var(--blue); color: #fff; }
.svc-card__icon .ic { width: 34px; height: 34px; }
.svc-card__title { font-size: 1.18rem; }
.svc-card__title a { color: var(--navy); }
.svc-card__text { color: var(--muted); font-size: .95rem; flex: 1; }

/* ---------- Why us ---------- */
.why { background: radial-gradient(1200px 500px at 85% 0%, #1E4F9C 0%, transparent 60%), var(--navy); color: #D3DEF2; }
.why .section__title, .why h3 { color: #fff; }
.why__grid { display: grid; gap: 36px; align-items: center; }
.stats { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 26px 0 8px; }
.stat { background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.12); border-radius: var(--radius-sm); padding: 16px; }
.stat strong { display: block; font-size: 2rem; font-weight: 800; color: var(--amber); line-height: 1.1; }
.stat span { font-size: .88rem; }
.why .note { color: #8FA5CC; }
.why__list { display: grid; gap: 14px; }
.why__item { display: flex; gap: 16px; background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.1); border-radius: var(--radius); padding: 20px; }
.why__item > .ic { width: 46px; height: 46px; padding: 10px; border-radius: 12px; background: var(--green); color: #fff; }
.why__item h3 { font-size: 1.05rem; margin-bottom: 4px; }
.why__item p { margin: 0; font-size: .93rem; }

/* ---------- Project cards ---------- */
.prj-card { background: #fff; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); transition: box-shadow .25s, transform .25s; display: flex; flex-direction: column; }
.prj-card:hover { box-shadow: var(--shadow); transform: translateY(-4px); }
.prj-card__img { position: relative; display: block; aspect-ratio: 16/10; overflow: hidden; background: var(--blue-50); }
.prj-card__img img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.prj-card:hover .prj-card__img img { transform: scale(1.05); }
.tag { position: absolute; left: 12px; top: 12px; background: var(--green); color: #fff; font-size: .78rem; font-weight: 600; padding: 4px 10px; border-radius: 99px; }
.prj-card__body { padding: 18px 20px 20px; }
.prj-card__title { font-size: 1.05rem; margin-bottom: 10px; }
.prj-card__title a { color: var(--navy); }
.prj-card__meta { list-style: none; display: flex; flex-wrap: wrap; gap: 6px 16px; color: var(--muted); font-size: .86rem; }
.prj-card__meta .ic { color: var(--green); }

/* ---------- Testimonials ---------- */
.testi { position: relative; margin: 0; background: #fff; border-radius: var(--radius); padding: 28px 24px 24px; border: 1px solid var(--line); }
.testi__quote { position: absolute; right: 20px; top: 18px; width: 40px; height: 40px; color: var(--blue-50); }
.testi__stars { color: var(--amber); display: flex; gap: 2px; margin-bottom: 12px; }
.testi blockquote { margin: 0 0 18px; color: var(--ink); font-size: .97rem; }
.testi figcaption strong { display: block; color: var(--navy); }
.testi figcaption span { font-size: .85rem; color: var(--muted); }

/* ---------- Post cards ---------- */
.post-card { background: #fff; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); display: flex; flex-direction: column; transition: box-shadow .25s; }
.post-card:hover { box-shadow: var(--shadow); }
.post-card__img { aspect-ratio: 16/10; overflow: hidden; background: var(--blue-50); display: block; }
.post-card__img img { width: 100%; height: 100%; object-fit: cover; }
.post-card__body { padding: 18px 20px 22px; }
.post-card__meta { display: flex; gap: 8px; font-size: .82rem; color: var(--muted); margin-bottom: 8px; }
.post-card__meta a { color: var(--green); font-weight: 600; }
.post-card__title { font-size: 1.08rem; }
.post-card__title a { color: var(--navy); }
.post-card__text { color: var(--muted); font-size: .93rem; margin: 0; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }

/* ---------- Forms ---------- */
.form { display: grid; gap: 14px; }
.form__row { display: grid; gap: 14px; }
.field { display: grid; gap: 6px; font-size: .9rem; font-weight: 600; color: var(--navy); }
.field input, .field select, .field textarea { width: 100%; font: inherit; font-weight: 400; color: var(--ink); background: #fff; border: 1.5px solid var(--line); border-radius: var(--radius-sm); padding: 12px 14px; transition: border-color .2s, box-shadow .2s; }
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--blue); box-shadow: 0 0 0 4px var(--blue-50); }
.form__note { font-size: .82rem; color: var(--muted); margin: 0; text-align: center; }
.hp { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.alert { padding: 12px 16px; border-radius: var(--radius-sm); font-size: .93rem; display: flex; gap: 8px; align-items: center; }
.alert--success { background: var(--green-50); color: var(--green-600); }
.alert--error { background: #FDECEC; color: #B42318; }

.quick-contact, .contact, .quote { display: grid; gap: 32px; align-items: start; }
.contact-list { list-style: none; display: grid; gap: 16px; margin: 20px 0; }
.contact-list li { display: flex; gap: 14px; align-items: flex-start; }
.contact-list li > .ic { width: 44px; height: 44px; padding: 11px; border-radius: 12px; background: var(--blue-50); color: var(--blue); }
.contact-list span { display: block; font-size: .82rem; color: var(--muted); }
.contact-list a { font-weight: 600; font-size: 1.05rem; }
.contact__quick { display: flex; flex-wrap: wrap; gap: 12px; }
.map iframe { display: block; width: 100%; height: 420px; border: 0; }

.steps { list-style: none; display: grid; gap: 16px; }
.steps li { display: flex; gap: 16px; }
.steps strong { flex: none; width: 44px; height: 44px; border-radius: 50%; background: var(--green); color: #fff; display: grid; place-items: center; font-size: 1.1rem; }
.steps h3 { font-size: 1.05rem; margin-bottom: 2px; }
.steps p { margin: 0; color: var(--muted); font-size: .93rem; }

/* ---------- Services list page ---------- */
.svc-list { display: grid; gap: 20px; }
.svc-row { display: flex; gap: 20px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.svc-row__icon { flex: none; width: 72px; height: 72px; border-radius: 18px; background: linear-gradient(135deg, var(--blue), var(--green)); color: #fff; display: grid; place-items: center; }
.svc-row__icon .ic { width: 38px; height: 38px; }
.svc-row h2 { font-size: 1.3rem; }
.svc-row h2 a { color: var(--navy); }
.svc-row p { color: var(--muted); }
.svc-row__actions { display: flex; flex-wrap: wrap; gap: 10px; }

/* ---------- Detail layout ---------- */
.layout-side { display: grid; gap: 32px; }
.content__cover { border-radius: var(--radius); margin-bottom: 24px; width: 100%; }
.prose { font-size: 1.02rem; }
.prose h2 { font-size: 1.45rem; margin-top: 1.6em; }
.prose h3 { font-size: 1.18rem; margin-top: 1.3em; }
.prose ul, .prose ol { padding-left: 1.3em; margin: 0 0 1.2em; }
.prose li { margin-bottom: .4em; }
.prose img { border-radius: var(--radius-sm); margin: 1em 0; }
.prose table, .table { width: 100%; border-collapse: collapse; margin: 1em 0; font-size: .95rem; }
.prose table { display: block; overflow-x: auto; -webkit-overflow-scrolling: touch; }
.prose iframe, .prose video { max-width: 100%; }
.prose th, .prose td, .table th, .table td { border: 1px solid var(--line); padding: 10px 12px; text-align: left; vertical-align: top; }
.prose th, .table th { background: var(--blue-50); color: var(--navy); }
.table-wrap { overflow-x: auto; }
.price { margin-top: 40px; padding: 24px; border-radius: var(--radius); background: var(--tint); border: 1px solid var(--line); }
.related { margin-top: 48px; }
.related > h2 { font-size: 1.4rem; }
.sidebar { display: grid; gap: 20px; align-content: start; }
.side-box { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; display: grid; gap: 12px; }
.side-box h2 { font-size: 1.1rem; margin: 0; }
.side-box p { margin: 0; }
.side-box--brand { background: linear-gradient(140deg, var(--navy), var(--blue)); color: #D3DEF2; border: 0; }
.side-box--brand h2 { color: #fff; }
.side-links { list-style: none; }
.side-links a { display: flex; gap: 10px; align-items: center; padding: 10px 0; border-bottom: 1px dashed var(--line); color: var(--ink); }
.side-links li:last-child a { border-bottom: 0; }
.side-links .ic { color: var(--green); }
.info { display: grid; grid-template-columns: auto 1fr; gap: 8px 14px; margin: 0; font-size: .94rem; }
.info dt { color: var(--muted); }
.info dd { margin: 0; font-weight: 600; color: var(--navy); }
.post-meta { display: flex; flex-wrap: wrap; gap: 8px 18px; font-size: .88rem; color: var(--muted); margin-bottom: 14px; }
.post-meta a { color: var(--green); font-weight: 600; }
.share { display: flex; gap: 12px; align-items: center; margin-top: 28px; padding-top: 20px; border-top: 1px solid var(--line); font-size: .92rem; }
.share a { padding: 6px 14px; border-radius: 99px; background: var(--blue-50); font-weight: 600; }
.gallery { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.gallery img { border-radius: var(--radius-sm); aspect-ratio: 4/3; object-fit: cover; width: 100%; }
.video { position: relative; aspect-ratio: 16/9; border-radius: var(--radius); overflow: hidden; background: #000; cursor: pointer; margin-bottom: 24px; }
.video img { width: 100%; height: 100%; object-fit: cover; opacity: .85; }
.video iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.video__play { position: absolute; inset: 0; margin: auto; width: 76px; height: 76px; border-radius: 50%; border: 0; background: var(--green); color: #fff; display: grid; place-items: center; }
.video__play .ic { width: 34px; height: 34px; margin-left: 4px; }

.filter { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin-bottom: 28px; }
.filter a { padding: 8px 18px; border-radius: 99px; border: 1.5px solid var(--line); color: var(--ink); font-weight: 600; font-size: .92rem; }
.filter a.active, .filter a:hover { background: var(--blue); border-color: var(--blue); color: #fff; }
.pager { display: flex; justify-content: center; gap: 6px; margin-top: 36px; }
.pager a, .pager span { min-width: 42px; height: 42px; display: grid; place-items: center; border-radius: var(--radius-sm); border: 1.5px solid var(--line); color: var(--ink); font-weight: 600; }
.pager .current { background: var(--blue); border-color: var(--blue); color: #fff; }

/* ---------- About page ---------- */
.letter { display: grid; gap: 36px; align-items: center; }
.letter__body p { color: #34415C; }
.letter__sign { margin-top: 20px; }
.letter__sign span { color: var(--muted); }
.letter__media img { border-radius: var(--radius); box-shadow: var(--shadow); }
.numbers { background: linear-gradient(110deg, var(--navy), var(--blue)); color: #D3DEF2; padding: 36px 0; }
.numbers__grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.vm-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 32px 28px; border-top: 5px solid var(--blue); }
.vm-card--green { border-top-color: var(--green); }
.vm-card > .ic { width: 48px; height: 48px; color: var(--blue); margin-bottom: 12px; }
.vm-card--green > .ic { color: var(--green); }
.vm-card p { color: var(--muted); margin: 0; }
.value { background: #fff; border-radius: var(--radius); padding: 24px 20px; text-align: center; border: 1px solid var(--line); }
.value > .ic { width: 52px; height: 52px; padding: 12px; border-radius: 50%; background: var(--green-50); color: var(--green); margin: 0 auto 12px; display: block; }
.value h3 { font-size: 1.05rem; }
.value p { font-size: .9rem; color: var(--muted); margin: 0; }
.field-card { display: grid; gap: 10px; padding: 26px 22px; border-radius: var(--radius); background: var(--tint); color: var(--ink); border: 1px solid var(--line); transition: background .25s, color .25s; }
.field-card > .ic { width: 42px; height: 42px; color: var(--blue); }
.field-card h3 { font-size: 1.08rem; margin: 0; }
.field-card:hover { background: var(--blue); color: #fff; }
.field-card:hover h3, .field-card:hover .ic, .field-card:hover .link-arrow { color: #fff; }
.timeline { list-style: none; position: relative; display: grid; gap: 22px; padding-left: 28px; }
.timeline::before { content: ""; position: absolute; left: 7px; top: 6px; bottom: 6px; width: 2px; background: linear-gradient(var(--blue), var(--green)); }
.timeline li { position: relative; background: #fff; border-radius: var(--radius); padding: 18px 20px; border: 1px solid var(--line); }
.timeline li::before { content: ""; position: absolute; left: -27px; top: 22px; width: 14px; height: 14px; border-radius: 50%; background: #fff; border: 3px solid var(--green); }
.timeline__year { display: inline-block; font-weight: 800; color: var(--green); font-size: .95rem; margin-bottom: 4px; }
.timeline h3 { font-size: 1.05rem; margin-bottom: 4px; }
.timeline p { margin: 0; color: var(--muted); font-size: .93rem; }
.org { display: flex; flex-direction: column; align-items: center; }
.org__node { background: var(--blue); color: #fff; font-weight: 600; padding: 12px 22px; border-radius: var(--radius-sm); text-align: center; min-width: 220px; box-shadow: var(--shadow-sm); }
.org__node--top { background: var(--navy); }
.org__node--dark { background: var(--green); }
.org__node--sm { background: #fff; color: var(--navy); border: 1.5px solid var(--blue); min-width: 0; font-size: .92rem; }
.org__node--green { border-color: var(--green); color: var(--green-600); }
.org__line { width: 2px; height: 26px; background: var(--line); }
.org__row { display: grid; grid-template-columns: 1fr; gap: 10px; width: 100%; max-width: 420px; }
.certs { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.cert { margin: 0; background: #fff; border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 10px; text-align: center; }
.cert img { width: 100%; aspect-ratio: 5/7; object-fit: cover; border-radius: 6px; }
.cert figcaption { font-size: .82rem; color: var(--muted); margin-top: 8px; }
.partners { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.partner { height: 86px; display: grid; place-items: center; background: #fff; border: 1px solid var(--line); border-radius: var(--radius-sm); color: var(--muted); font-weight: 600; filter: grayscale(1); transition: filter .3s; }
.partner:hover { filter: none; }
.notfound { text-align: center; padding: 40px 16px; }
.notfound__code { font-size: 6rem; font-weight: 800; color: var(--blue-50); -webkit-text-stroke: 2px var(--blue); line-height: 1; margin: 0; }
.notfound .hero__actions { justify-content: center; }

/* ---------- CTA band & footer ---------- */
.cta-band { background: linear-gradient(100deg, var(--green-600), var(--green)); color: #E8FFF2; padding: 36px 0; }
.cta-band__inner { display: grid; gap: 18px; align-items: center; }
.cta-band__title { color: #fff; font-size: clamp(1.3rem, 3vw, 1.75rem); margin-bottom: 4px; }
.cta-band p { margin: 0; }
.cta-band__actions { display: flex; flex-wrap: wrap; gap: 12px; }
.cta-band .btn--accent { background: var(--navy); }
.cta-band .btn--accent:hover { background: #081c40; }

.footer { background: #0A1F45; color: #A9B9D6; font-size: .93rem; padding-top: 52px; }
.footer__grid { display: grid; gap: 32px; padding-bottom: 36px; }
.footer__about img { width: 150px; height: auto; margin-bottom: 14px; }
.footer__legal { color: #fff; font-weight: 600; }
.footer__title { color: #fff; font-size: 1.05rem; margin-bottom: 14px; }
.footer__links, .footer__contact { list-style: none; display: grid; gap: 10px; }
.footer a { color: #C9D6EE; }
.footer a:hover { color: #fff; }
.footer__contact li { display: flex; gap: 10px; align-items: flex-start; }
.footer__contact .ic { color: var(--green); margin-top: 3px; }
.social { display: flex; gap: 10px; }
.social a { width: 38px; height: 38px; border-radius: 50%; display: grid; place-items: center; background: rgba(255,255,255,.08); color: #fff; }
.social a:hover { background: var(--green); }
.social__zalo { width: auto !important; padding: 0 12px; border-radius: 99px !important; font-size: .8rem; font-weight: 700; }
.footer__bottom { border-top: 1px solid rgba(255,255,255,.08); padding: 18px 0 90px; font-size: .85rem; text-align: center; }

/* ---------- Floating contact buttons ---------- */
.float-actions { position: fixed; left: 14px; bottom: 16px; z-index: 90; display: flex; flex-direction: column; align-items: flex-start; gap: 12px; }
.float-btn { position: relative; display: inline-flex; align-items: center; gap: 8px; height: 52px; min-width: 52px; border-radius: 99px; color: #fff; box-shadow: 0 8px 22px -6px rgba(0,0,0,.35); justify-content: center; }
.float-btn--zalo { background: #0068FF; }
.float-btn__zalo { font-weight: 800; font-size: .85rem; }
.float-btn--phone { background: #E5322D; padding: 0 18px 0 14px; }
.float-btn--phone::before { content: ""; position: absolute; inset: -6px; border-radius: 99px; border: 3px solid rgba(229,50,45,.45); animation: ring 1.6s infinite; }
.float-btn__label { font-weight: 700; font-size: .95rem; display: none; }
.float-btn:hover { color: #fff; filter: brightness(1.08); }
@keyframes ring { 0% { transform: scale(.92); opacity: 1; } 100% { transform: scale(1.25); opacity: 0; } }
.to-top { position: fixed; right: 16px; bottom: 18px; z-index: 90; width: 44px; height: 44px; border-radius: 12px; border: 0; background: var(--blue); color: #fff; display: grid; place-items: center; opacity: 0; visibility: hidden; transition: opacity .3s, visibility .3s; }
.to-top.is-visible { opacity: 1; visibility: visible; }

/* Hiệu ứng xuất hiện khi cuộn (chỉ khi JS sẵn sàng) */
.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.js .reveal.is-in { opacity: 1; transform: none; }

@media (max-width: 380px) {
    .brand img { width: 40px; height: 40px; }
    .brand__sub { font-size: .72rem; }
    .hero__actions .btn { flex: 1 1 100%; }
    .highlights__grid { grid-template-columns: 1fr; }
    .hl { align-items: center; padding: 12px 4px; }
}

/* ==========================================================================
   Tablet ≥ 640px
   ========================================================================== */
@media (min-width: 640px) {
    .grid--2, .grid--3, .grid--4 { grid-template-columns: repeat(2, 1fr); }
    .grid--5 { grid-template-columns: repeat(3, 1fr); }
    .form__row { grid-template-columns: 1fr 1fr; }
    .stats { grid-template-columns: repeat(4, 1fr); }
    .numbers__grid { grid-template-columns: repeat(3, 1fr); }
    .certs { grid-template-columns: repeat(3, 1fr); }
    .partners { grid-template-columns: repeat(3, 1fr); }
    .gallery { grid-template-columns: repeat(3, 1fr); }
    .org__row { grid-template-columns: repeat(2, 1fr); max-width: 640px; }
    .footer__grid { grid-template-columns: 1fr 1fr; }
    .float-btn__label { display: inline; }
}

/* ==========================================================================
   Desktop ≥ 1024px
   ========================================================================== */
@media (min-width: 1024px) {
    :root { --header-h: 84px; }
    .topbar { display: block; }
    .burger { display: none; }
    .nav { position: static; height: auto; transform: none; visibility: visible; opacity: 1; transition: none; flex-direction: row; align-items: center; padding: 0; overflow: visible; gap: 22px; background: none; }
    .nav__list { display: flex; gap: 4px; }
    .nav__list > li { border: 0; flex-wrap: nowrap; }
    .nav__list > li > a { padding: 10px 12px; border-radius: 8px; font-size: .97rem; }
    .nav__list > li > a:hover, .nav__list a.active { color: var(--blue); background: var(--blue-50); }
    .sub-toggle { display: none; }
    .sub { display: block; position: absolute; top: 100%; left: 0; min-width: 280px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius-sm); box-shadow: var(--shadow); padding: 8px; opacity: 0; visibility: hidden; transform: translateY(8px); transition: opacity .2s, transform .2s, visibility .2s; }
    .has-sub:hover .sub, .has-sub:focus-within .sub { opacity: 1; visibility: visible; transform: none; }
    .sub a { padding: 10px 12px; border-radius: 8px; }
    .sub a:hover { background: var(--blue-50); }
    .nav__cta { align-self: auto; }
    .brand img { width: 54px; height: 54px; }
    .brand__name { font-size: 1.25rem; }

    .section { padding: 84px 0; }
    .hero__slides, .hero__slide.is-active { min-height: 620px; }
    .highlights__grid { grid-template-columns: repeat(4, 1fr); }
    .hl { padding: 26px 12px; }
    .grid--3 { grid-template-columns: repeat(3, 1fr); }
    .grid--4 { grid-template-columns: repeat(4, 1fr); }
    .grid--5 { grid-template-columns: repeat(5, 1fr); }
    .about-short, .letter { grid-template-columns: 1fr 1fr; gap: 64px; }
    .letter { grid-template-columns: 1.3fr 1fr; }
    .why__grid { grid-template-columns: 1fr 1fr; gap: 64px; }
    .quick-contact, .contact { grid-template-columns: 1fr 1.15fr; gap: 56px; }
    .quote { grid-template-columns: 1.4fr 1fr; gap: 48px; }
    .layout-side { grid-template-columns: minmax(0, 1fr) 340px; gap: 48px; }
    .sidebar { position: sticky; top: calc(var(--header-h) + 20px); }
    .numbers__grid { grid-template-columns: repeat(5, 1fr); }
    .certs { grid-template-columns: repeat(5, 1fr); }
    .partners { grid-template-columns: repeat(6, 1fr); }
    .org__row { grid-template-columns: repeat(5, 1fr); max-width: none; }
    .cta-band__inner { grid-template-columns: 1fr auto; }
    .footer__grid { grid-template-columns: 1.4fr 1fr 1fr 1.3fr; gap: 40px; }
    .footer__bottom { padding-bottom: 18px; }
    .page-banner { padding: 64px 0 56px; }
}

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