/* ========== CSS VARIABLES ========== */
:root {
  --font-family: 'Mulish', sans-serif;
  --font-size: 15px;
  --color-text: #000;
  --color-primary: #066fef;
  --color-primary-hover: #0558c4;
  --color-red: #dc3545;
  --color-blue: #288ad6;
  --color-bgheader: #111;
  --color-bgmenu: #fff;
  --color-menu: #00142e;
  --color-bgbody: #fff;
  --color-bgfooter: #e9ecf0;
  --color-border: #ddd;
  --max-width: 1200px;
}

/* ========== RESET ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { font-family: var(--font-family); font-size: var(--font-size); color: var(--color-text); background: var(--color-bgbody); line-height: 1.6; }
a { text-decoration: none; color: inherit; transition: color 0.2s; }
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }
button, input, select, textarea { font-family: var(--font-family); }

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 16px; }

/* ========== HEADER ========== */
.header { position: sticky; top: 0; z-index: 1000; box-shadow: 0 2px 8px rgba(0,0,0,0.15); }

.header-nav {
  background: var(--color-bgmenu);
  border-bottom: 1px solid #eee;
}

.navbar {
  display: flex;
  align-items: center;
  min-height: 62px;
  gap: 0;
}

.navbar-brand img {
  height: 46px;
  width: auto;
  object-fit: contain;
}

/* Nav */
.navbar-nav {
  display: flex;
  list-style: none;
  margin: 0 auto;
  padding: 0;
  gap: 2px;
}

.nav-item { position: relative; }

.nav-link {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 10px 13px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-menu);
  white-space: nowrap;
  border-radius: 4px;
  transition: background 0.2s, color 0.2s;
  min-height: 44px;
}
.nav-link:hover, .nav-link.active { background: var(--color-primary); color: #fff; }
.nav-link .caret { font-size: 11px; transition: transform 0.25s; }
.caret-toggle { display: none; }

/* Dropdown */
.nav-item.dropdown:hover .dropdown-menu { display: flex; }

.dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: #fff;
  border: 1px solid #e0e0e0;
  border-top: 3px solid var(--color-primary);
  box-shadow: 0 8px 30px rgba(0,0,0,0.12);
  padding: 12px;
  gap: 8px;
  flex-wrap: wrap;
  width: 680px;
  z-index: 999;
  border-radius: 0 0 8px 8px;
}

.col-dropdown-item { width: calc(100% / 4); }
.col-dropdown-item a {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 10px 6px;
  border-radius: 6px;
  transition: background 0.2s;
  font-size: 12px;
  color: #333;
  text-align: center;
}
.col-dropdown-item a:hover { background: #f0f7ff; color: var(--color-primary); }
.col-dropdown-item img { width: 80px; height: 54px; object-fit: contain; }
.col-dropdown-item span { font-weight: 600; font-size: 11px; }

/* Hotline button */
.header-right { flex-shrink: 0; margin-left: 12px; }
.btn-hotline {
  display: inline-block;
  background: #fd6e1d;
  color: #fff !important;
  padding: 9px 15px;
  border-radius: 4px;
  font-size: 13px;
  font-weight: 700;
  white-space: nowrap;
  transition: background 0.2s;
}
.btn-hotline:hover { background: #e05c10; }

/* Hamburger */
.navbar-toggler {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px; height: 36px;
  background: none;
  border: none;
  cursor: pointer;
  margin-left: auto;
  padding: 4px;
  flex-shrink: 0;
  -webkit-tap-highlight-color: transparent;
  outline: none;
}
.navbar-toggler:focus { outline: none; box-shadow: none; }
.navbar-toggler span {
  display: block;
  width: 22px; height: 2px;
  background: #333;
  border-radius: 2px;
  transition: all 0.3s;
}

/* ========== BANNER SLIDER ========== */
.banner-main {
  position: relative;
  overflow: hidden;
  background: #000;
  line-height: 0;
}
.owl-banner { position: relative; }
.banner-slide { display: none; }
.banner-slide.active { display: block; }
.banner-slide img {
  width: 100%;
  height: auto;
  max-height: 520px;
  object-fit: cover;
  display: block;
}

.banner-prev, .banner-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(0,0,0,0.35);
  color: #fff;
  border: none;
  font-size: 18px;
  width: 40px; height: 40px;
  border-radius: 50%;
  cursor: pointer;
  transition: background 0.2s;
  z-index: 10;
  display: flex; align-items: center; justify-content: center;
}
.banner-prev { left: 12px; }
.banner-next { right: 12px; }
.banner-prev:hover, .banner-next:hover { background: rgba(0,0,0,0.65); }

.banner-dots {
  position: absolute;
  bottom: 12px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 7px;
  z-index: 10;
}
.bdot {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: rgba(255,255,255,0.55);
  cursor: pointer;
  transition: background 0.2s, transform 0.2s;
}
.bdot.active { background: #fff; transform: scale(1.25); }

/* ========== WRAP / SECTION ========== */
.wrap { padding: 28px 0; }
.wrap-bg { background: #f8f8f8; }

/* ========== BOX ========== */
.box { }
.box-header { margin-bottom: 20px; }
.box-title {
  font-size: 19px;
  font-weight: 800;
  color: #1a1a1a;
  position: relative;
  padding-bottom: 12px;
  margin-bottom: 0;
  line-height: 1.4;
}
.box-title::after {
  content: '';
  display: block;
  width: 50px;
  height: 3px;
  background: var(--color-primary);
  border-radius: 2px;
  margin-top: 8px;
}

/* ========== GRID ROWS ========== */
.row { display: flex; flex-wrap: wrap; margin: 0 -8px; }

.col-half { width: 50%; padding: 0 8px; margin-bottom: 16px; }
.col-third { width: 33.333%; padding: 0 8px; margin-bottom: 20px; }
.col-quarter { width: 25%; padding: 0 8px; margin-bottom: 16px; }

/* ========== FEATURE ITEMS ========== */
.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: #fff;
  height: 100%;
  transition: border-color 0.2s, box-shadow 0.2s;
  cursor: pointer;
}
.feature-item:hover {
  border-color: var(--color-primary);
  box-shadow: 0 4px 16px rgba(6,111,239,0.1);
  color: inherit;
}
.feature-item-bg { background: #fff; }

.icon-wrap {
  flex-shrink: 0;
  width: 46px; height: 46px;
  background: var(--color-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 18px;
  font-style: normal;
}

.feature-body { display: flex; flex-direction: column; gap: 4px; }
.feature-title { font-size: 14px; font-weight: 700; color: #1a1a1a; }
.feature-desc { font-size: 12px; color: #666; line-height: 1.5; }

/* ========== NAV TABS ========== */
.nav-tabs {
  display: flex;
  list-style: none;
  gap: 6px;
  margin-top: 14px;
  flex-wrap: wrap;
}
.nav-tabs .tab-btn {
  padding: 8px 18px;
  font-size: 13px;
  font-weight: 600;
  font-family: var(--font-family);
  background: #f0f0f0;
  color: #555;
  border: 1px solid #ddd;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s;
  min-height: 38px;
}
.nav-tabs .tab-btn:hover,
.nav-tabs .tab-btn.active {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

/* ========== PRODUCT ITEMS ========== */
.product-item {
  border: 1px solid #e8e8e8;
  border-radius: 8px;
  overflow: hidden;
  background: #fff;
  height: 100%;
  transition: box-shadow 0.25s, transform 0.25s;
}
.product-item:hover {
  box-shadow: 0 8px 28px rgba(0,0,0,0.1);
  transform: translateY(-3px);
}

.product-item-img {
  background: #f5f5f5;
  padding: 10px;
  text-align: center;
  overflow: hidden;
}
.product-item-img img {
  width: 100%;
  height: 155px;
  object-fit: contain;
  transition: transform 0.3s;
}
.product-item:hover .product-item-img img { transform: scale(1.04); }

.product-body { padding: 12px 14px 14px; }

.product-item-title {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 7px;
  line-height: 1.35;
}
.product-item-title a { color: #1a1a1a; }
.product-item-title a:hover { color: var(--color-primary); }

.product-item-price { margin-bottom: 11px; }
.price {
  font-size: 15px;
  color: var(--color-red);
  font-weight: 700;
  margin: 0;
}
.price span {
  font-weight: 400;
  color: #666;
  margin-right: 4px;
  font-size: 13px;
}

.btn-action { display: flex; gap: 6px; flex-wrap: wrap; }

/* ========== BUTTONS ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 8px 13px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 600;
  font-family: var(--font-family);
  cursor: pointer;
  transition: all 0.2s;
  border: 1.5px solid transparent;
  white-space: nowrap;
  min-height: 38px;
}
.btn-primary {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}
.btn-primary:hover { background: var(--color-primary-hover); border-color: var(--color-primary-hover); color: #fff; }

.btn-outline-primary {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn-outline-primary:hover { background: var(--color-primary); color: #fff; }

/* ========== PROMO BLOCK ========== */
.block-highlight { padding: 10px 0; }
.block-highlight p, .block-highlight li {
  font-size: 14px;
  line-height: 1.8;
  margin-bottom: 6px;
}
.promo-list {
  list-style: decimal;
  padding-left: 20px;
  margin-bottom: 16px;
}
.promo-list li { margin-bottom: 5px; font-size: 14px; }

.promo-benefits {
  list-style: none;
  padding-left: 0;
  margin-bottom: 16px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.promo-benefits li {
  background: #f0f8ff;
  border-left: 3px solid var(--color-primary);
  padding: 8px 12px;
  border-radius: 0 6px 6px 0;
  font-size: 13px;
}

.promo-cta-row {
  display: flex;
  gap: 12px;
  max-width: 640px;
  margin: 16px auto;
  flex-wrap: wrap;
}
.promo-btn-hotline, .promo-btn-quote {
  flex: 1;
  min-width: 200px;
  display: block;
  text-align: center;
  padding: 12px 14px;
  border-radius: 6px;
  font-size: 15px;
  color: #fff !important;
  font-weight: 700;
}
.promo-btn-hotline { background: #fd6e1d; }
.promo-btn-hotline:hover { background: #e05c10; }
.promo-btn-quote { background: #288ad6; }
.promo-btn-quote:hover { background: #1a70b8; }
.promo-btn-hotline span, .promo-btn-quote span {
  display: block;
  font-size: 12px;
  margin-top: 3px;
  font-weight: 400;
}

.promo-quote {
  border-left: 4px solid var(--color-primary);
  background: #fff;
  padding: 14px 18px;
  margin-top: 16px;
  border-radius: 0 6px 6px 0;
}
.promo-quote p { margin-bottom: 6px; font-size: 13px; }

/* ========== FORM ========== */
.section-test-drive { background: #f8f8f8; }

.box-border {
  border: 1px solid #e0e0e0;
  border-radius: 10px;
  overflow: hidden;
  background: #fff;
  box-shadow: 0 4px 20px rgba(0,0,0,0.06);
}
.box-border .box-header {
  background: var(--color-primary);
  padding: 14px 20px;
  margin-bottom: 0;
}
.box-border .box-header .box-title {
  color: #fff;
  font-size: 16px;
  padding-bottom: 0;
}
.box-border .box-header .box-title::after { display: none; }
.box-border .box-body { padding: 24px 20px; }

.max-width-form { max-width: 600px; margin: 0 auto; }

.form-group { margin-bottom: 14px; }
.radio-group { display: flex; flex-wrap: wrap; gap: 4px 20px; }
.radio-group label { font-size: 14px; cursor: pointer; display: flex; align-items: center; gap: 6px; min-height: 38px; }
.radio-group input { margin-right: 4px; width: 16px; height: 16px; cursor: pointer; }

.form-control {
  width: 100%;
  padding: 11px 13px;
  border: 1px solid #ccc;
  border-radius: 6px;
  font-size: 14px;
  font-family: var(--font-family);
  color: #333;
  transition: border-color 0.2s;
  background: #fff;
  min-height: 44px;
  -webkit-appearance: none;
}
.form-control:focus { outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(6,111,239,0.1); }
textarea.form-control { resize: vertical; min-height: 80px; }

.btn-submit {
  width: 100%;
  background: #fd6e1d;
  color: #fff;
  border: none;
  padding: 14px;
  border-radius: 6px;
  font-size: 16px;
  font-weight: 700;
  font-family: var(--font-family);
  cursor: pointer;
  letter-spacing: 0.5px;
  transition: background 0.2s;
  min-height: 50px;
}
.btn-submit:hover { background: #e05c10; }
.form-payment { display:flex; gap:8px; }
.payment-label {
  flex:1; border:1.5px solid #dde; border-radius:8px;
  padding:9px 10px; font-size:13px; font-weight:600; color:#333;
  cursor:pointer; text-align:center; transition:border-color 0.2s;
  display:flex; align-items:center; justify-content:center; gap:6px;
}
.payment-label:has(input:checked) { border-color:var(--color-primary); background:#f0f6ff; }

/* ========== FOOTER ========== */
.footer {
  background: var(--color-bgfooter);
  padding: 40px 0 0;
  font-size: 14px;
}

.footer-inner {
  display: flex;
  gap: 30px;
  flex-wrap: wrap;
  padding-bottom: 30px;
  border-bottom: 1px solid #d5d8dc;
}

.footer-about { flex: 2; min-width: 220px; }
.footer-col { flex: 1; min-width: 130px; }

.footer-logo img {
  height: 50px;
  width: auto;
  object-fit: contain;
  margin-bottom: 14px;
}

.footer-about p { font-size: 13px; color: #444; margin-bottom: 5px; line-height: 1.6; }
.footer-about a { color: var(--color-primary); font-weight: 600; }

.footer-title {
  font-size: 14px;
  font-weight: 700;
  color: #1a1a1a;
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-primary);
  display: block;
  width: fit-content;
}

.footer-col ul li { margin-bottom: 7px; }
.footer-col ul a { font-size: 13px; color: #555; }
.footer-col ul a:hover { color: var(--color-primary); }

.btn-footer-call {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #fd6e1d;
  color: #fff !important;
  padding: 11px 18px;
  border-radius: 6px;
  font-weight: 700;
  font-size: 15px;
  margin-top: 10px;
  transition: background 0.2s;
}
.btn-footer-call:hover { background: #e05c10; }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 0;
  flex-wrap: wrap;
  gap: 10px;
}
.footer-bottom p { font-size: 12px; color: #777; }
.footer-links { display: flex; gap: 16px; flex-wrap: wrap; }
.footer-links a { font-size: 12px; color: #777; }
.footer-links a:hover { color: var(--color-primary); }

/* ========== MOBILE BOTTOM NAV ========== */
.mobile-bottom-nav { display: none; }

/* ========== FLOATING ACTIONS ========== */
.float-actions {
  position: fixed;
  right: 14px;
  bottom: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 999;
}

.float-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: 30px;
  font-size: 13px;
  font-weight: 700;
  color: #fff !important;
  box-shadow: 0 4px 14px rgba(0,0,0,0.2);
  transition: transform 0.2s, box-shadow 0.2s;
  white-space: nowrap;
  min-height: 44px;
}
.float-btn:hover { transform: translateX(-4px); box-shadow: 0 6px 20px rgba(0,0,0,0.25); }
.float-btn i { font-size: 15px; flex-shrink: 0; }

.float-phone { background: #27ae60; animation: pulse 2s infinite; }
.float-zalo { background: #0068ff; }
.float-form { background: var(--color-primary); }
.float-top {
  background: #888;
  padding: 10px 14px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s, transform 0.2s;
}
.float-top.visible { opacity: 1; pointer-events: all; }

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(39,174,96,0.5); }
  50% { box-shadow: 0 0 0 9px rgba(39,174,96,0); }
}

/* ========== TOAST ========== */
.toast-msg {
  position: fixed;
  bottom: 80px;
  left: 50%;
  transform: translateX(-50%);
  background: #333;
  color: #fff;
  padding: 12px 24px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 600;
  z-index: 9999;
  white-space: nowrap;
  box-shadow: 0 4px 16px rgba(0,0,0,0.25);
  animation: fadeInUp 0.3s ease;
}
@keyframes fadeInUp {
  from { opacity: 0; transform: translateX(-50%) translateY(16px); }
  to   { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* ========================================
   RESPONSIVE — TABLET (≤1024px)
======================================== */
@media (max-width: 1024px) {
  .col-quarter { width: 50%; }
  .dropdown-menu { width: 500px; }
}

/* ========================================
   RESPONSIVE — TABLET NHỎ (≤900px)
======================================== */
@media (max-width: 900px) {
  .dropdown-menu { width: 420px; }
  .col-third { width: 50%; }
}

/* ========================================
   RESPONSIVE — MOBILE (≤768px)
======================================== */
@media (max-width: 768px) {
  /* Header */
  .navbar-nav, .header-right { display: none; }
  .navbar-toggler { display: flex; }
  .navbar { position: relative; min-height: 58px; }

  .navbar-nav.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 58px;
    left: 0; right: 0; bottom: 0;
    background: #fff;
    border-top: 3px solid var(--color-primary);
    box-shadow: 0 8px 24px rgba(0,0,0,0.13);
    padding: 8px 0 70px;
    z-index: 999;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }

  /* Hotline hiện trong mobile menu */
  .navbar-nav.open .nav-mobile-hotline {
    display: flex !important;
    margin: 8px 16px 4px;
  }
  .navbar-nav.open .nav-link {
    padding: 13px 20px;
    border-radius: 0;
    font-size: 15px;
    border-bottom: 1px solid #f2f2f2;
    min-height: 50px;
  }
  /* Dropdown mặc định ẩn, chỉ show khi .dropdown.open */
  .navbar-nav.open .dropdown-menu { display: none; }
  .navbar-nav.open .dropdown.open .dropdown-menu {
    display: flex;
    flex-wrap: wrap;
    position: static;
    box-shadow: none;
    border: none;
    background: #f7f9fc;
    width: 100%;
    padding: 12px 10px;
    gap: 0;
  }

  /* Caret toggle button - chỉ hiện trên mobile */
  .caret-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    position: absolute;
    right: 0; top: 0;
    width: 50px; height: 50px;
    cursor: pointer;
    color: var(--color-menu);
    font-size: 14px;
  }
  /* Mũi tên xoay khi mở */
  .navbar-nav.open .dropdown.open .caret { transform: rotate(180deg); }
  .navbar-nav.open .nav-item.dropdown .nav-link { padding-right: 50px; }

  /* 3 sản phẩm mỗi hàng, ảnh to */
  .navbar-nav.open .dropdown.open .col-dropdown-item { width: calc(100% / 3); padding: 8px 6px; }
  .navbar-nav.open .dropdown.open .col-dropdown-item img {
    width: 100%; height: 70px; object-fit: contain;
  }
  .navbar-nav.open .dropdown.open .col-dropdown-item a {
    padding: 8px 4px; gap: 6px; border-radius: 8px; background: #fff;
    box-shadow: 0 1px 4px rgba(0,0,0,0.07);
  }
  .navbar-nav.open .dropdown.open .col-dropdown-item span {
    font-size: 11px; font-weight: 700; color: #111; line-height: 1.3;
  }

  /* Banner */
  .banner-slide img { max-height: 220px; }
  .banner-prev, .banner-next { width: 34px; height: 34px; font-size: 14px; }

  /* Grid */
  .col-quarter { width: 50%; }
  .col-third { width: 50%; }
  .col-half { width: 50%; }

  /* Promo benefits 1 cột */
  .promo-benefits { grid-template-columns: 1fr; }

  /* Box title */
  .box-title { font-size: 17px; }

  /* Footer */
  .footer-inner { flex-direction: column; gap: 20px; }
  .footer-bottom { flex-direction: column; text-align: center; }

  /* Floating - ẩn trên mobile, thay bằng bottom nav */
  .float-actions { display: none !important; }

  /* Mobile bottom navigation bar */
  .mobile-bottom-nav {
    display: flex;
    position: fixed;
    bottom: 0; left: 0; right: 0;
    height: 58px;
    background: #fff;
    border-top: 1px solid #e0e0e0;
    box-shadow: 0 -3px 14px rgba(0,0,0,0.12);
    z-index: 1000;
  }
  .mob-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    color: #444;
    font-size: 10px;
    font-weight: 700;
    padding: 4px 2px;
    text-decoration: none;
    border-right: 1px solid #f0f0f0;
    transition: background 0.15s;
    -webkit-tap-highlight-color: transparent;
  }
  .mob-item:last-child { border-right: none; }
  .mob-item:active { opacity: 0.75; }

  /* Icon tròn cho tất cả nút (trừ nút call center) */
  .mob-item:not(.mob-call-center) i,
  .mob-item:not(.mob-call-center) svg {
    width: 32px; height: 32px;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 15px;
    margin-bottom: 2px;
    flex-shrink: 0;
  }
  .mob-item:not(.mob-call-center) svg { padding: 7px; box-sizing: border-box; }

  /* Màu từng nút */
  .mob-item:nth-child(1) i { background: linear-gradient(135deg,#a18cd1,#fbc2eb); color: #fff; }   /* Nhận ưu đãi - tím gradient */
  .mob-item:nth-child(2) i { background: #fff3e0; color: #f57c00; }                                /* Báo giá - cam nhạt */
  .mob-item:nth-child(4) svg { background: #1a6ed8; color: #fff; }                                 /* Zalo - xanh đậm */
  .mob-item:nth-child(5) i { background: linear-gradient(135deg,#f6d365,#fda085); color: #fff; }   /* Lái thử - vàng/cam */

  /* Nút Gọi ngay ở giữa — nổi bật */
  .mob-call-center {
    position: relative;
    flex: 1.2;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding-top: 0;
    border-right: 1px solid #f0f0f0;
    color: #e62222 !important;
    background: transparent;
  }
  .mob-call-center i {
    width: 52px; height: 52px;
    background: linear-gradient(135deg, #ff4e00, #e62222);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 22px;
    color: #fff;
    margin-top: -20px;
    box-shadow: 0 4px 16px rgba(230,34,34,0.45);
    animation: mob-ring 1.4s ease-in-out infinite;
  }
  .mob-call-center span {
    font-size: 10px; font-weight: 700;
    color: #e62222; margin-top: 3px;
  }

  @keyframes mob-ring {
    0%   { transform: rotate(0deg) scale(1); }
    5%   { transform: rotate(-18deg) scale(1.08); }
    10%  { transform: rotate(18deg) scale(1.08); }
    15%  { transform: rotate(-14deg) scale(1.05); }
    20%  { transform: rotate(14deg) scale(1.05); }
    25%  { transform: rotate(-10deg) scale(1.02); }
    30%  { transform: rotate(0deg) scale(1); }
    100% { transform: rotate(0deg) scale(1); }
  }

  /* Body padding để nội dung không bị che */
  body { padding-bottom: 58px; }

  /* Header mobile - gọn hơn */
  .navbar { min-height: 54px; }
  .navbar-brand img { height: 40px; }
  .btn-hotline { font-size: 12px; padding: 7px 10px; }
}

/* ========================================
   RESPONSIVE — MOBILE NHỎ (≤480px)
======================================== */
@media (max-width: 480px) {
  .container { padding: 0 12px; }

  /* Header */
  .navbar-brand img { height: 40px; }

  /* Banner */
  .banner-slide img { max-height: 180px; }

  /* Grid: 2 cột cho tất cả trên mobile */
  .col-third  { width: 50%; padding: 0 5px; margin-bottom: 12px; }
  .col-half   { width: 50%; padding: 0 5px; margin-bottom: 12px; }
  .col-quarter { width: 50%; padding: 0 5px; margin-bottom: 12px; }

  /* Product card nội dung */
  .product-item-img img { height: 110px; }
  .product-body { padding: 8px; }
  .product-item-title { font-size: 13px; margin-bottom: 4px; }
  .price { font-size: 13px; }
  .btn-action { flex-direction: column; gap: 5px; }
  .btn-action .btn { width: 100%; justify-content: center; font-size: 12px; }

  /* Section */
  .wrap { padding: 20px 0; }
  .box-title { font-size: 15px; }
  .box-header { margin-bottom: 14px; }

  /* Promo */
  .promo-cta-row { flex-direction: column; }
  .promo-btn-hotline, .promo-btn-quote { min-width: unset; }
  .promo-list li { font-size: 13px; }

  /* Feature items: 2 cột gọn, ẩn description */
  .feature-item { padding: 10px 8px; gap: 8px; flex-direction: column; align-items: center; text-align: center; }
  .icon-wrap { width: 36px; height: 36px; font-size: 15px; }
  .feature-title { font-size: 12px; font-weight: 700; }
  .feature-desc { display: none; }

  /* Floating - ẩn hoàn toàn trên mobile nhỏ */
  .float-actions { display: none !important; }

  /* Form */
  .box-border .box-body { padding: 16px 14px; }
  .form-control { font-size: 16px; } /* tránh zoom trên iOS */
  .btn-submit { font-size: 15px; }

  /* Footer */
  .footer { padding: 28px 0 0; }
  .footer-col { min-width: 100%; }
}

/* ========================================
   RESPONSIVE — MOBILE RẤT NHỎ (≤360px)
======================================== */
@media (max-width: 360px) {
  .product-item-img img { height: 100px; }
  .product-body { padding: 8px; }
  .product-item-title { font-size: 12px; }
  .box-title { font-size: 14px; }
}