html, body {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
    background: #2c2c2e; /* nền ngoài */
    height: 100%;
    overflow: hidden; /* không cho cuộn ngoài */
  }

  body {
    display: flex;
    justify-content: center;
    align-items: start;
    min-height: 100vh;
  }

  .outer-wrapper {
    background-color: #444;
    display: flex;
    justify-content: center;
    align-items: start;
    min-height: 100vh;
    overflow: hidden;
    width: 100vw;
  }


  .fixed-container {
    width: 420px;
    min-width: 420px;
    max-width: 420px;
    height: 100vh;
    overflow-y: auto;
    background: #000;
    flex-shrink: 0; /* NGĂN THU NHỎ */
    position: relative;
  }



  /* ======================== CÁC PHẦN KHÁC ======================== */

  /* TOPBAR */
  .topbar {
    background: #000;
    padding: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  .top-left {
    display: flex;
    align-items: center;
  }
  .logo {
    width: 120px;
    height: auto;
  }
  .top-right .btn {
    background: #ffcc00;
    color: #000;
    padding: 6px 10px;
    margin-left: 5px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: bold;
    font-size: 14px;
  }
  .top-right .btn:hover {
    background: #ffaa00;
  }

  /* BANNER */
  .banner-slider {
    width: 100%;
    overflow: hidden;
  }
  .banner-slider img {
    width: 100%;
    display: block;
  }

  /* NGÔN NGỮ ICON */
  .lang-switch-img {
    margin: 15px 0;
    text-align: center;
  }
  .lang-switch-img img {
    width: 32px;
    height: 22px;
    margin: 0 6px;
    border-radius: 4px;
    border: 1px solid #555;
    cursor: pointer;
    transition: 0.2s;
  }
  .lang-switch-img img:hover {
    transform: scale(1.1);
    border-color: #ffcc00;
  }

  /* LIÊN HỆ */
  .contact-section {
    padding: 10px 0;
    background: #222;
    margin-bottom: -10px;
    text-align: center;
  }
  .contact-section h3 {
    margin-bottom: 10px;
    font-size: 18px;
    color: #ffcc00;
  }
  .contact-section p {
    margin: 5px 0;
    color: #ddd;
    font-size: 14px;
  }
  .contact-card-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    max-width: 360px;
    margin: 0 auto;
  }
  .contact-card {
    background-color: #1e1e1e;
    border-radius: 10px;
    overflow: hidden;
    text-align: center;
    box-shadow: 0 0 6px rgba(0,0,0,0.3);
    transition: transform 0.2s ease;
  }
  .contact-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.2);
  }
  .contact-card img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 10px;
  }
  .contact-title {
    text-align: center;
    font-size: 20px;
    color: #fff;
    margin-bottom: 16px;
  }

  /* TIN TỨC */
  .news-section {
    padding: 10px 20px 20px;
    text-align: center;
  }
  .news-title {
    color: #fff;
    font-size: 20px;
    margin-bottom: 10px;
  }
  .news-card-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    justify-items: center;
    padding: 10px 0;
  }
  .news-card {
    display: block;
    width: 100%;
    max-width: 180px;
    border-radius: 12px;
    overflow: hidden;
    transition: transform 0.3s ease;
  }
  .news-card img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 12px;
  }
  .news-card:hover {
    transform: scale(1.05);
  }

  /* NOTICE BAR */
  .notice-bar {
    display: flex;
    align-items: center;
    padding: 8px 10px;
    background-color: #1f1f1f;
    border-top: 1px solid #444;
    border-bottom: 1px solid #444;
  }
  .notice-icon {
    width: 18px;
    height: 18px;
    margin-right: 10px;
  }
  .notice-text {
    color: #fff;
    font-size: 14px;
    white-space: nowrap;
  }

  /* LIGHTBOX */
  .lightbox {
    display: none;
    position: fixed;
    z-index: 999;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background-color: rgba(0, 0, 0, 0.85);
    justify-content: center;
    align-items: center;
    flex-direction: column;
  }
  .lightbox-img {
    max-width: 90%;
    max-height: 80%;
    margin-bottom: 20px;
  }
  .lightbox .close {
    position: absolute;
    top: 10px; right: 20px;
    font-size: 40px;
    color: white;
    cursor: pointer;
  }
  .lightbox-nav button {
    background: white;
    padding: 10px 20px;
    font-size: 20px;
    margin: 0 10px;
    cursor: pointer;
  }
  
/* Contact section background – force */
.contact-section{
  position: relative;
  background-image: url('/images/bg1.png') !important; /* ĐỔI thành ảnh bạn có */
  background-size: cover !important;
  background-position: center !important;
  background-repeat: no-repeat !important;
}
.contact-section::before{
  content: "";
  position: absolute; inset: 0;
  background: rgba(0,0,0,.35);
}
.contact-section > * { position: relative; z-index: 1; }