/*
Theme Name: Quoc Phong
Theme URI: https://dietmoiquocphong.vn
Author: Diet Moi Quoc Phong
Description: Theme thiet ke rieng cho Cong ty Diet Moi Quoc Phong - dich vu kiem soat con trung, diet moi tan goc.
Version: 1.4.0
Requires PHP: 7.4
License: GNU General Public License v2 or later
Text Domain: quocphong
*/

:root {
  --green-950: #0a2e1b;
  --green-900: #0d3b24;
  --green-800: #14532d;
  --green-700: #166534;
  --green-600: #16a34a;
  --green-500: #22c55e;
  --green-50: #f0fdf4;
  --amber-500: #f59e0b;
  --amber-400: #fbbf24;
  --ink: #16241c;
  --muted: #5b6b61;
  --line: #e3eae5;
  --bg: #ffffff;
  --bg-soft: #f6f9f7;
  --radius: 14px;
  --shadow: 0 10px 30px -12px rgba(13, 59, 36, .18);
  --maxw: 1200px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Be Vietnam Pro', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--green-700); text-decoration: none; transition: color .2s; }
a:hover { color: var(--green-600); }
ul { list-style: none; }
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

h1, h2, h3, h4 { line-height: 1.25; font-weight: 700; color: var(--green-950); }
.section { padding: 72px 0; }
.section--soft { background: var(--bg-soft); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 44px; }
.section-head .kicker {
  display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: .12em;
  text-transform: uppercase; color: var(--green-600); margin-bottom: 10px;
}
.section-head h2 { font-size: clamp(26px, 3.6vw, 38px); margin-bottom: 12px; }
.section-head p { color: var(--muted); }

.btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 13px 26px;
  border-radius: 999px; font-weight: 600; font-size: 15px; cursor: pointer;
  border: 2px solid transparent; transition: all .2s;
}
.btn--primary { background: var(--green-600); color: #fff; }
.btn--primary:hover { background: var(--green-700); color: #fff; transform: translateY(-1px); }
.btn--amber { background: var(--amber-500); color: var(--green-950); }
.btn--amber:hover { background: var(--amber-400); color: var(--green-950); }
.btn--ghost { border-color: rgba(255,255,255,.5); color: #fff; }
.btn--ghost:hover { background: rgba(255,255,255,.12); color: #fff; }
.btn--outline { border-color: var(--green-600); color: var(--green-700); }
.btn--outline:hover { background: var(--green-50); }

/* ---------- Topbar ---------- */
.topbar { background: var(--green-950); color: #cfe6d8; font-size: 13px; }
.topbar .container { display: flex; justify-content: space-between; align-items: center; min-height: 38px; gap: 12px; }
.topbar a { color: #fff; font-weight: 600; }
.topbar__item { display: inline-flex; align-items: center; gap: 6px; }
.topbar__group { display: flex; gap: 20px; align-items: center; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 60; background: rgba(255,255,255,.92);
  backdrop-filter: blur(12px); border-bottom: 1px solid var(--line);
  transition: box-shadow .3s;
}
.site-header.scrolled { box-shadow: 0 8px 30px -14px rgba(13,59,36,.35); }
.site-header .container { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 72px; max-width: 1280px; }
.brand { display: flex; align-items: center; flex-shrink: 0; }
.brand img { height: 54px; width: auto; transition: transform .3s; }
.brand:hover img { transform: scale(1.04); }

.nav { display: flex; align-items: center; gap: 4px; }
.nav > ul { display: flex; gap: 0; }
.nav a { display: block; padding: 9px 12px; font-weight: 600; font-size: 14.5px; color: var(--ink); border-radius: 8px; white-space: nowrap; }
.nav a:hover { color: var(--green-600); }
.nav > ul > li > a { position: relative; }
.nav > ul > li > a::after {
  content: ""; position: absolute; left: 12px; right: 100%; bottom: 4px; height: 2.5px;
  background: linear-gradient(90deg, var(--green-600), var(--amber-500));
  border-radius: 3px; transition: right .28s ease;
}
.nav > ul > li > a:hover::after,
.nav > ul > li.current-menu-item > a::after,
.nav > ul > li.current_page_item > a::after { right: 12px; }
.nav .current-menu-item > a, .nav .current_page_item > a { color: var(--green-600); }
.nav li { position: relative; }
.nav .sub-menu {
  position: absolute; top: 100%; left: 0; min-width: 230px; background: #fff;
  border: 1px solid var(--line); border-radius: 12px; box-shadow: var(--shadow);
  padding: 8px; opacity: 0; visibility: hidden; transform: translateY(8px); transition: all .2s;
}
.nav li:hover > .sub-menu { opacity: 1; visibility: visible; transform: translateY(2px); }
.nav .sub-menu a { padding: 9px 12px; font-size: 14px; border-radius: 8px; }
.header-cta { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.header-hotline {
  display: flex; align-items: center; gap: 10px; line-height: 1.15;
  background: var(--green-50); border: 1px solid #d3ecdc; border-radius: 999px; padding: 7px 18px 7px 9px;
  transition: box-shadow .25s, transform .25s;
}
.header-hotline:hover { box-shadow: 0 8px 20px -8px rgba(22,163,74,.45); transform: translateY(-1px); }
.header-hotline .hp-ico {
  width: 34px; height: 34px; border-radius: 50%; background: var(--green-600); color: #fff;
  display: flex; align-items: center; justify-content: center; font-size: 15px;
  animation: ringring 2.4s infinite;
}
@keyframes ringring {
  0%, 100% { transform: rotate(0); }
  6%, 18% { transform: rotate(-14deg); }
  12%, 24% { transform: rotate(12deg); }
  30% { transform: rotate(0); }
}
.header-hotline span { display: block; font-size: 10px; color: var(--muted); text-transform: uppercase; letter-spacing: .08em; }
.header-hotline a { font-size: 17px; font-weight: 800; color: var(--green-700); white-space: nowrap; }

.nav-toggle { display: none; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 24px; height: 2.5px; background: var(--green-900); margin: 5px 0; border-radius: 2px; transition: .25s; }

/* ---------- Hero ---------- */
.hero { position: relative; color: #fff; overflow: hidden; }
.hero__bg { position: absolute; inset: 0; background-size: cover; background-position: center; }
.hero__bg::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(100deg, rgba(8,40,24,.94) 0%, rgba(13,59,36,.82) 45%, rgba(13,59,36,.45) 100%);
}
.hero .container { position: relative; z-index: 2; padding-top: 96px; padding-bottom: 96px; }
.hero__badge {
  display: inline-flex; align-items: center; gap: 8px; background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.25); padding: 7px 16px; border-radius: 999px;
  font-size: 13.5px; font-weight: 600; margin-bottom: 22px;
}
.hero h1 { color: #fff; font-size: clamp(30px, 5vw, 52px); font-weight: 800; max-width: 640px; margin-bottom: 18px; }
.hero h1 em { font-style: normal; color: var(--amber-400); }
.hero p { max-width: 560px; font-size: 17px; color: #d9e9df; margin-bottom: 30px; }
.hero__actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero__badge, .hero h1, .hero p, .hero__actions { animation: fadeUp .7s ease backwards; }
.hero h1 { animation-delay: .12s; }
.hero p { animation-delay: .24s; }
.hero__actions { animation-delay: .36s; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(22px); } to { opacity: 1; transform: none; } }

/* ---------- Stats ---------- */
.stats { background: var(--green-900); color: #fff; }
.stats__grid { display: grid; grid-template-columns: repeat(6, 1fr); }
.stat { text-align: center; padding: 30px 8px; border-left: 1px solid rgba(255,255,255,.09); }
.stat:first-child { border-left: 0; }
.stat b { display: block; font-size: clamp(22px, 2.6vw, 34px); font-weight: 800; color: var(--amber-400); }
.stat span { font-size: 13.5px; color: #bcd8c7; }

/* ---------- Cards / Grids ---------- */
.grid { display: grid; gap: 24px; }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
.grid--testi { grid-template-columns: repeat(2, 1fr); max-width: 900px; margin: 0 auto; }
@media (max-width: 760px) { .grid--testi { grid-template-columns: 1fr; } }

.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; transition: transform .25s, box-shadow .25s; display: flex; flex-direction: column;
}
.card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.card__img { aspect-ratio: 16 / 10; overflow: hidden; background: var(--bg-soft); }
.card__img img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.card:hover .card__img img { transform: scale(1.05); }
.card__body { padding: 22px; flex: 1; display: flex; flex-direction: column; }
.card__body h3 { font-size: 18px; margin-bottom: 8px; }
.card__body h3 a { color: inherit; }
.card__body h3 a:hover { color: var(--green-600); }
.card__body p { color: var(--muted); font-size: 14.5px; flex: 1; }
.card__more { margin-top: 14px; font-weight: 600; font-size: 14px; color: var(--green-600); }

/* product card */
.pcard { text-align: center; }
.pcard .card__img { aspect-ratio: 1 / 1; padding: 18px; }
.pcard .card__img img { object-fit: contain; }
.pcard .cat { font-size: 12px; text-transform: uppercase; letter-spacing: .08em; color: var(--amber-500); font-weight: 700; margin-bottom: 6px; }

/* ---------- Why us ---------- */
.why { position: relative; color: #fff; }
.why__bg { position: absolute; inset: 0; background: linear-gradient(120deg, var(--green-950), var(--green-800)); }
.why .container { position: relative; z-index: 2; }
.why h2, .why h3 { color: #fff; }
.why__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.why__item { background: rgba(255,255,255,.07); border: 1px solid rgba(255,255,255,.14); border-radius: var(--radius); padding: 28px; }
.why__item .ico { width: 52px; height: 52px; border-radius: 12px; background: var(--amber-500); color: var(--green-950); display: flex; align-items: center; justify-content: center; font-size: 24px; margin-bottom: 16px; }
.why__item h3 { font-size: 18px; margin-bottom: 10px; }
.why__item li { position: relative; padding-left: 22px; font-size: 14.5px; color: #d9e9df; margin: 7px 0; }
.why__item li::before { content: "✓"; position: absolute; left: 0; color: var(--amber-400); font-weight: 700; }

/* ---------- Testimonials ---------- */
.tcard { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; }
.tcard blockquote { font-size: 15.5px; color: var(--ink); margin-bottom: 18px; }
.tcard__who { display: flex; align-items: center; gap: 12px; }
.tcard__who img { width: 48px; height: 48px; border-radius: 50%; object-fit: cover; }
.tcard__who b { display: block; font-size: 15px; }
.tcard__who span { font-size: 13px; color: var(--muted); }
.tcard .starline { color: var(--amber-500); font-size: 14px; letter-spacing: 2px; margin-bottom: 12px; }

/* case study */
.casestudy { margin-top: 40px; background: linear-gradient(120deg, var(--green-50), #fff); border: 1px solid #cfeadb; border-radius: var(--radius); padding: 32px; box-shadow: var(--shadow); }
.casestudy__badge { display: inline-block; background: var(--green-600); color: #fff; font-size: 12.5px; font-weight: 700; padding: 5px 14px; border-radius: 999px; margin-bottom: 12px; }
.casestudy h3 { font-size: 22px; margin-bottom: 20px; }
.casestudy__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.casestudy .cs-k { display: block; font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; color: var(--amber-500); margin-bottom: 6px; }
.casestudy__grid p { color: var(--ink); font-size: 14.5px; }
@media (max-width: 760px) { .casestudy__grid { grid-template-columns: 1fr; } }

/* ---------- Clients / certs ---------- */
.logos { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 40px; }
.logos img { height: 52px; width: auto; filter: grayscale(1); opacity: .65; transition: .25s; }
.logos img:hover { filter: none; opacity: 1; }

/* certificates slider */
.certs-slider { position: relative; }
.certs-track {
  display: flex; gap: 22px; overflow-x: auto; scroll-snap-type: x mandatory;
  padding: 10px 4px 18px; scrollbar-width: none; -webkit-overflow-scrolling: touch;
}
.certs-track::-webkit-scrollbar { display: none; }
.cert-item {
  flex: 0 0 auto; width: min(400px, 80vw); scroll-snap-align: center;
  background: #fff; border: 1px solid var(--line); border-radius: 18px; padding: 14px;
  box-shadow: var(--shadow); cursor: zoom-in; transition: transform .3s, box-shadow .3s;
}
.cert-item:hover { transform: translateY(-8px) scale(1.01); box-shadow: 0 24px 50px -18px rgba(13,59,36,.35); }
.cert-item img { width: 100%; height: 440px; object-fit: contain; border-radius: 10px; background: var(--bg-soft); }
.cert-item figcaption { text-align: center; font-weight: 600; font-size: 14px; color: var(--green-800); padding: 12px 6px 4px; }
.certs-nav {
  position: absolute; top: 50%; transform: translateY(-50%); z-index: 5;
  width: 46px; height: 46px; border-radius: 50%; border: 0; cursor: pointer;
  background: var(--green-600); color: #fff; font-size: 20px; font-weight: 700;
  box-shadow: 0 10px 24px -8px rgba(22,163,74,.55); transition: background .2s, transform .2s;
  display: flex; align-items: center; justify-content: center;
}
.certs-nav:hover { background: var(--green-700); transform: translateY(-50%) scale(1.08); }
.certs-nav--prev { left: -14px; }
.certs-nav--next { right: -14px; }
.certs-hint { text-align: center; color: var(--muted); font-size: 13px; margin-top: 4px; }

/* lightbox */
.qp-lightbox {
  position: fixed; inset: 0; z-index: 200; background: rgba(8, 24, 15, .93);
  display: none; align-items: center; justify-content: center; padding: 28px;
  animation: lbfade .25s ease;
}
.qp-lightbox.open { display: flex; }
.qp-lightbox img { max-width: 94vw; max-height: 88vh; border-radius: 12px; box-shadow: 0 30px 80px rgba(0,0,0,.5); }
.qp-lightbox .lb-close {
  position: absolute; top: 20px; right: 24px; width: 44px; height: 44px; border-radius: 50%;
  border: 0; background: rgba(255,255,255,.14); color: #fff; font-size: 22px; cursor: pointer;
}
.qp-lightbox .lb-close:hover { background: rgba(255,255,255,.3); }
@keyframes lbfade { from { opacity: 0; } to { opacity: 1; } }

/* scroll reveal */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .65s ease, transform .65s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .hp-ico, .float-call { animation: none !important; }
}

/* ---------- CTA band ---------- */
.cta-band { position: relative; color: #fff; overflow: hidden; }
.cta-band__bg { position: absolute; inset: 0; background-size: cover; background-position: center; }
.cta-band__bg::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(8,40,24,.95), rgba(13,59,36,.75)); }
.cta-band .container { position: relative; z-index: 2; padding: 64px 20px; display: flex; align-items: center; justify-content: space-between; gap: 28px; flex-wrap: wrap; }
.cta-band h2 { color: #fff; font-size: clamp(24px, 3vw, 34px); max-width: 620px; }
.cta-band p { color: #d9e9df; margin-top: 8px; }

/* ---------- Archive layouts ---------- */
.page-hero { background: linear-gradient(120deg, var(--green-950), var(--green-700)); color: #fff; padding: 56px 0; }
.page-hero h1 { color: #fff; font-size: clamp(26px, 4vw, 40px); }
.page-hero .crumbs { font-size: 13.5px; color: #b7d4c3; margin-bottom: 10px; }
.page-hero .crumbs a { color: #fff; }

.layout { display: grid; grid-template-columns: 1fr 300px; gap: 40px; align-items: start; }
.layout--rev { grid-template-columns: 300px 1fr; }
.sidebar .widget { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; margin-bottom: 22px; }
.sidebar .widget h4 { font-size: 16px; margin-bottom: 14px; padding-bottom: 10px; border-bottom: 2px solid var(--green-600); display: inline-block; }
.sidebar .widget li { border-bottom: 1px dashed var(--line); }
.sidebar .widget li:last-child { border-bottom: 0; }
.sidebar .widget li a { display: flex; justify-content: space-between; padding: 9px 0; font-size: 14.5px; color: var(--ink); }
.sidebar .widget li a:hover { color: var(--green-600); }
.sidebar .widget li .count { color: var(--muted); font-size: 13px; }
.widget--call { background: var(--green-900) !important; color: #fff; text-align: center; border: 0 !important; }
.widget--call h4 { color: #fff; border-color: var(--amber-400) !important; }
.widget--call .bigphone { font-size: 22px; font-weight: 800; color: var(--amber-400); display: block; margin: 8px 0 14px; }

/* ---------- Single content ---------- */
.entry { max-width: 800px; }
.entry-content { font-size: 16.5px; }
.entry-content > * + * { margin-top: 1.1em; }
.entry-content h2 { font-size: 26px; margin-top: 1.6em; }
.entry-content h3 { font-size: 21px; margin-top: 1.4em; }
.entry-content ul, .entry-content ol { padding-left: 26px; }
.entry-content ul { list-style: disc; }
.entry-content ol { list-style: decimal; }
.entry-content img { border-radius: 12px; margin: 1.4em auto; }
.entry-content blockquote { border-left: 4px solid var(--green-600); background: var(--green-50); padding: 16px 22px; border-radius: 0 10px 10px 0; }
.entry-content table { width: 100%; border-collapse: collapse; }
.entry-content th, .entry-content td { border: 1px solid var(--line); padding: 10px 12px; text-align: left; }
.entry-content th { background: var(--bg-soft); }
.entry-meta { display: flex; gap: 16px; color: var(--muted); font-size: 13.5px; margin: 14px 0 26px; flex-wrap: wrap; }
.entry-meta .badge { background: var(--green-50); color: var(--green-700); font-weight: 600; padding: 3px 12px; border-radius: 999px; }

/* product single */
.product-single { display: grid; grid-template-columns: 420px 1fr; gap: 44px; align-items: start; }
.product-single__img { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; position: sticky; top: 100px; }
.product-single__img img { width: 100%; object-fit: contain; aspect-ratio: 1/1; }
.product-actions { display: flex; gap: 12px; margin: 22px 0; flex-wrap: wrap; }
.stockline { display: inline-flex; align-items: center; gap: 8px; color: var(--green-600); font-weight: 600; font-size: 14.5px; }

/* details/accordion (FAQ) */
.entry-content details, .faq details { border: 1px solid var(--line); border-radius: 12px; padding: 0; margin-top: 12px; background: #fff; }
.entry-content summary, .faq summary { cursor: pointer; font-weight: 600; padding: 16px 20px; list-style: none; position: relative; }
.entry-content summary::after, .faq summary::after { content: "+"; position: absolute; right: 20px; font-size: 20px; color: var(--green-600); }
details[open] summary::after { content: "−"; }
.entry-content details > *:not(summary), .faq details > *:not(summary) { padding: 0 20px 16px; color: var(--muted); }

/* ---------- Contact page ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }
.office { display: flex; gap: 14px; padding: 16px 0; border-bottom: 1px dashed var(--line); }
.office .pin { flex: 0 0 42px; height: 42px; border-radius: 10px; background: var(--green-50); color: var(--green-600); display: flex; align-items: center; justify-content: center; font-size: 19px; }
.office b { display: block; font-size: 15px; }
.office p { color: var(--muted); font-size: 14px; }
.office a { font-weight: 700; }
.form-box { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 30px; box-shadow: var(--shadow); }
.form-box h3 { margin-bottom: 6px; }
.form-box .sub { color: var(--muted); font-size: 14px; margin-bottom: 20px; }
.field { margin-bottom: 16px; }
.field label { display: block; font-weight: 600; font-size: 14px; margin-bottom: 6px; }
.field input, .field textarea, .field select {
  width: 100%; padding: 12px 14px; border: 1.5px solid var(--line); border-radius: 10px;
  font: inherit; background: var(--bg-soft); transition: border .2s;
}
.field input:focus, .field textarea:focus, .field select:focus { outline: none; border-color: var(--green-600); background: #fff; }
.notice { padding: 14px 18px; border-radius: 10px; margin-bottom: 18px; font-size: 14.5px; }
.notice--ok { background: var(--green-50); color: var(--green-700); border: 1px solid #bbe7cc; }
.notice--err { background: #fef2f2; color: #b91c1c; border: 1px solid #fecaca; }

/* archive intro */
.archive-intro { max-width: 780px; margin: 0 auto 36px; text-align: center; }
.archive-intro h2 { font-size: 24px; margin-bottom: 10px; }
.archive-intro p { color: var(--muted); }

/* ---------- Blog list ---------- */
.post-card__meta { display: flex; gap: 12px; font-size: 13px; color: var(--muted); margin-bottom: 8px; }
.post-card__meta .cat { color: var(--amber-500); font-weight: 700; text-transform: uppercase; font-size: 12px; letter-spacing: .06em; }

/* ---------- Pagination ---------- */
.pagination { display: flex; gap: 8px; justify-content: center; margin-top: 44px; }
.pagination .page-numbers {
  min-width: 42px; height: 42px; display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid var(--line); border-radius: 10px; font-weight: 600; color: var(--ink); padding: 0 12px;
}
.pagination .page-numbers.current, .pagination .page-numbers:hover { background: var(--green-600); color: #fff; border-color: var(--green-600); }

/* ---------- Footer ---------- */
.site-footer { background: var(--green-950); color: #b9d3c4; font-size: 14.5px; }
.site-footer a { color: #dcefe4; }
.site-footer a:hover { color: var(--amber-400); }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.1fr; gap: 40px; padding: 60px 0 44px; }
.site-footer h4 { color: #fff; font-size: 16px; margin-bottom: 18px; }
.site-footer li { margin: 9px 0; }
.footer-brand img { height: 54px; margin-bottom: 16px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.1); padding: 18px 0; font-size: 13.5px; display: flex; justify-content: space-between; gap: 10px; flex-wrap: wrap; }
.foot-office { margin-bottom: 12px; }
.foot-office b { color: #fff; font-weight: 600; }

/* floating contact stack */
.float-stack { position: fixed; left: 20px; bottom: 20px; z-index: 80; display: flex; flex-direction: column; gap: 12px; }
.float-btn {
  display: flex; align-items: center; gap: 10px; color: #fff; padding: 9px 18px 9px 9px;
  border-radius: 999px; font-weight: 700; font-size: 14.5px; box-shadow: 0 12px 28px -10px rgba(0,0,0,.4);
}
.float-btn:hover { color: #fff; transform: translateY(-2px); }
.float-btn img { width: 24px; height: 24px; }
.float-btn .ring, .float-btn > span[aria-hidden] { width: 40px; height: 40px; border-radius: 50%; background: rgba(255,255,255,.22); display: flex; align-items: center; justify-content: center; font-size: 19px; flex-shrink: 0; }
.float-btn--call { background: var(--green-600); animation: pulse 2s infinite; }
.float-btn--call:hover { background: var(--green-700); }
.float-btn--zalo { background: #0068ff; }
.float-btn--zalo:hover { background: #0052cc; }
.float-btn--mess { background: #d44dbb; background: linear-gradient(45deg,#0084ff,#a334fa,#ff5eb0); }
@keyframes pulse { 0%,100% { box-shadow: 0 12px 28px -10px rgba(0,0,0,.4), 0 0 0 0 rgba(22,163,74,.5);} 50% { box-shadow: 0 12px 28px -10px rgba(0,0,0,.4), 0 0 0 12px rgba(22,163,74,0);} }
@media (max-width: 560px) {
  .float-stack { left: 12px; bottom: 12px; gap: 10px; }
  .float-btn__label { display: none; }
  .float-btn { padding: 8px; border-radius: 50%; }
}

/* contact map */
.contact-map { margin-top: 44px; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); box-shadow: var(--shadow); }
.contact-map iframe { display: block; width: 100%; height: 420px; border: 0; }

/* price line */
.price-box { display: flex; align-items: baseline; gap: 10px; margin: 4px 0 16px; }
.price-box .price { font-size: 24px; font-weight: 800; color: var(--green-700); }
.price-box .price-note { color: var(--muted); font-size: 14px; }
.pcard .price-lh { color: var(--green-700); font-weight: 700; font-size: 14px; margin-top: 4px; }

/* ---------- Responsive ---------- */
@media (max-width: 1150px) {
  .brand img { height: 46px; }
  .nav a { padding: 9px 9px; font-size: 13.5px; }
  .header-hotline .hp-txt span:first-child { display: none; }
  .header-hotline a { font-size: 15px; }
}
@media (max-width: 1024px) {
  .grid--4 { grid-template-columns: repeat(3, 1fr); }
  .stats__grid { grid-template-columns: repeat(3, 1fr); }
  .stat:nth-child(4) { border-left: 0; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .product-single { grid-template-columns: 1fr; }
  .product-single__img { position: static; max-width: 420px; }
  .layout, .layout--rev { grid-template-columns: 1fr; }
  .layout--rev .sidebar { order: 2; }
}
@media (max-width: 860px) {
  /* backdrop-filter turns the header into a containing block and breaks the
     fixed-position drawer on mobile — disable it there */
  .site-header { backdrop-filter: none; background: #fff; }
  body.nav-open .site-header { z-index: 100; }
  body.nav-open { overflow: hidden; }
  .nav {
    position: fixed; top: 0; right: 0; bottom: 0; left: auto;
    height: 100vh; height: 100dvh;
    width: min(320px, 85vw); background: #fff; z-index: 90;
    flex-direction: column; align-items: stretch; padding: 84px 24px 24px;
    box-shadow: -20px 0 50px rgba(0,0,0,.15);
    transform: translateX(100%); transition: transform .3s;
    overflow-y: auto; -webkit-overflow-scrolling: touch;
  }
  body.nav-open .nav { transform: translateX(0); }
  .nav-backdrop {
    position: fixed; top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(8, 24, 15, .45); z-index: 85;
    opacity: 0; visibility: hidden; transition: opacity .25s, visibility .25s;
  }
  body.nav-open .nav-backdrop { opacity: 1; visibility: visible; }
  .nav > ul { flex-direction: column; }
  .nav a { padding: 12px 10px; font-size: 15.5px; }
  .nav > ul > li { border-bottom: 1px solid var(--line); }
  .nav > ul > li > a::after { display: none; }
  .nav .sub-menu { position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none; border: 0; padding-left: 14px; }
  .nav-toggle { display: block; z-index: 95; }
  body.nav-open .nav-toggle span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
  body.nav-open .nav-toggle span:nth-child(2) { opacity: 0; }
  body.nav-open .nav-toggle span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }
  .header-hotline { display: none; }
  .grid--3, .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .why__grid, .contact-grid { grid-template-columns: 1fr; }
  .certs-nav { display: none; }
  .cert-item img { height: 340px; }
  .topbar__group--right { display: none; }
  .topbar .container { justify-content: center; }
}
@media (max-width: 560px) {
  .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .stats__grid { grid-template-columns: repeat(2, 1fr); }
  .stat { border-left: 0; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .section { padding: 52px 0; }
  .hero .container { padding-top: 68px; padding-bottom: 68px; }
}