body {
  background: url('images/BACKGROUND.jpg') no-repeat center top;
  background-size: cover;
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
}

header {
  text-align: center;
  padding: 30px 0 10px 0;
}

.logo {
  width:500px;
}


.main-content {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  margin-top: 10px;
  gap: 80px;
}

.left-buttons, .right-buttons {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.left-buttons img, .right-buttons img {
  width: 300px;
  transition: transform 0.2s;
  cursor: pointer;
}

.left-buttons img:hover, .right-buttons img:hover {
  transform: scale(1.05);
  filter: brightness(1.1);
}

.center-image img {
  width: 800px;
  border-radius: 20px;
 
}

.info-row {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 50px;
  margin: 40px 0 0 0;
}

.info-row img {
  width: 90px;
  transition: transform 0.2s;
  cursor: pointer;
}

.info-row img:hover {
  transform: scale(1.08);
  filter: brightness(1.1);
}

.speed-title {
  text-align: center;
  color: #ee0707;
  font-size: 28px;
  font-weight: bold;
  margin: 40px 0 20px 0;
  letter-spacing: 1px;
}

.quick-links {
  display: flex;
  justify-content: center;
  gap: 30px;
  margin-bottom: 40px;
}

.quick-links img {
  width: 300px;
  transition: transform 0.2s;
  cursor: pointer;
}

.quick-links img:hover {
  transform: scale(1.08);
  filter: brightness(1.1);
}

/* Ẩn mobile layout trên desktop */
.mobile-layout {
  display: none;
  background: url('images/mbi.png') no-repeat center top;
  background-size: cover;
}

/* Chỉ hiển thị mobile layout trên mobile */
@media (max-width: 900px) {
  header, .main-content, .info-row, .speed-title, .quick-links, .logo {
    display: none !important;
    visibility: hidden !important;
    height: 0 !important;
    width: 0 !important;
    overflow: hidden !important;
    position: absolute !important;
    left: -9999px !important;
  }
  .mobile-layout {
    display: block !important;
    visibility: visible !important;
    position: static !important;
    width: 100% !important;
    min-height: 100vh;
    background: url('images/mbi.png') no-repeat center top;
    background-size: cover;
  }
  .mobile-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 10px 0 10px;
  }
  .mobile-logo {
    width: 90px;
    height: auto;
  }
  .mobile-header-buttons {
    display: flex;
    gap: 8px;
  }
  .mobile-btn.small {
    background: linear-gradient(90deg, #ffb347 0%, #ee0707 100%);
    color: #fff;
    border: 2px solid rgba(255,255,255,0.25);
    border-radius: 24px;
    padding: 8px 26px;
    font-size: 10px;
    font-weight: bold;
    margin-left: 2px;
    box-shadow: 0 4px 18px 0 rgba(255,102,0,0.18), 0 0 8px 2px rgba(255,180,71,0.18);
    text-shadow: 0 2px 8px rgba(255,102,0,0.18);
    transition: background 0.2s, transform 0.15s, box-shadow 0.2s, border 0.2s;
  }
  .mobile-btn.small:hover, .mobile-btn.small:active {
    background: linear-gradient(90deg, #ffd580 0%, #ee0707 100%);
    transform: scale(1.09) translateY(-2px);
    box-shadow: 0 8px 32px 0 rgba(255,102,0,0.28), 0 0 16px 4px rgba(255,180,71,0.22);
    border: 2.5px solid rgba(255,255,255,0.35);
  }
  .mobile-btn.large {
    background: linear-gradient(90deg, #ffb347 0%, #ee0707 100%);
    color: #fff;
    border: 2.5px solid rgba(255,255,255,0.28);
    border-radius: 22px;
    padding: 12px 28px;
    font-size: 18px;
    font-weight: bold;
    box-shadow: 0 8px 32px 0 rgba(255,102,0,0.22), 0 0 18px 4px rgba(255,180,71,0.18);
    text-shadow: 0 2px 10px rgba(255,102,0,0.18);
    transition: background 0.2s, transform 0.15s, box-shadow 0.2s, border 0.2s;
  }
  .mobile-btn.large:hover, .mobile-btn.large:active {
    background: linear-gradient(90deg, #ffe0b2 0%, #ee0707 100%);
    transform: scale(1.11) translateY(-3px);
    box-shadow: 0 12px 40px 0 rgba(255,102,0,0.32), 0 0 24px 6px rgba(255,180,71,0.22);
    border: 3px solid rgba(255,255,255,0.45);
  }
  .mobile-title {
    text-align: center;
    font-size: 48px;
    font-weight: bold;
    color: #0077c8;
    margin: 10px 0 0 0;
    letter-spacing: 2px;
  }
  .mobile-main-buttons {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin: 18px 0 0 0;
  }
  .mobile-desc {
    text-align: center;
    color: #ee0707;
    font-size: 24px;
    font-weight: bold;
    margin: 22px 0 0 0;
    line-height: 1.4;
    letter-spacing: 0.5px;
    text-shadow: 0 2px 8px rgba(255,102,0,0.12), 0 1px 0 #fff;
  }
  .mobile-link-main {
    text-align: center;
    color: #b71c1c;
    font-size: 16px;
    font-weight: bold;
    margin: 10px 0 10px 0;
    letter-spacing: 1px;
  }
  .mobile-links {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 12px;
    justify-items: center;
    margin: 0 0 18px 0;
  }
  .mobile-link {
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(90deg, #ff5252 0%, #d32f2f 100%);
    color: #fff;
    border: 2px solid rgba(255,255,255,0.18);
    border-radius: 32px;
    padding: 0 0;
    width: 110px;
    height: 48px;
    font-size: 17px;
    font-weight: 600;
    box-shadow: 0 4px 18px 0 rgba(211,47,47,0.18), 0 0 8px 2px rgba(255,82,82,0.13);
    text-shadow: 0 2px 8px rgba(211,47,47,0.18);
    transition: background 0.2s, transform 0.15s, box-shadow 0.2s, border 0.2s;
    text-decoration: none;
    margin: 0;
    text-align: center;
  }
  .mobile-link:hover, .mobile-link:active {
    background: linear-gradient(90deg, #ff867c 0%, #d32f2f 100%);
    transform: scale(1.12) translateY(-2px);
    box-shadow: 0 10px 32px 0 rgba(211,47,47,0.28), 0 0 16px 4px rgba(255,82,82,0.18);
    border: 2.5px solid rgba(255,255,255,0.28);
  }
  .mobile-image-row {
    display: flex;
    justify-content: center;
    align-items: flex-end;
    gap: 10px;
    margin: 18px 0 0 0;
  }
  .mobile-phone {
    width: 120px;
    height: auto;
  }
  .mobile-girl {
    width: 110px;
    height: auto;
  }
  .mobile-customer-title {
    text-align: center;
    color: #ee0707;
    font-size: 18px;
    font-weight: bold;
    margin: 18px 0 0 0;
    letter-spacing: 1px;
  }
  .mobile-cskh {
    background: #ee0707;
    border-radius: 18px;
    margin: 16px 12px 0 12px;
    padding: 18px 0 10px 0;
    text-align: center;
  }
  .mobile-cskh-title {
    color: #fff;
    font-size: 20px;
    font-weight: bold;
    margin-bottom: 8px;
  }
  .mobile-cskh-icon {
    width: 48px;
    height: 48px;
    margin-top: 4px;
  }
  .mobile-title-logo {
    display: block;
    margin: 30px  auto;
    width: 600px;
    max-width: 100vw;
    height: auto;
  }
}

.mobile-btn.small, .mobile-btn.large {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.icon-user-plus, .icon-user {
  display: flex;
  align-items: center;
  margin-right: 4px;
}