* {
      box-sizing: border-box;
    }

    body {
      margin: 0;
      font-family: Arial, sans-serif;
      background: #f4f6fb;
      color: #222;
    }

    .container {
      max-width: 750px;
      margin: 0 auto;
      padding: 20px;
    }

    .card {
      background: #fff;
      border-radius: 18px;
      box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
      overflow: hidden;
      padding-bottom: 25px;
    }

    .banner {
      width: 100%;
      height: 220px;
      object-fit: cover;
      display: block;
    }

    h1 {
      margin: 20px 0 10px;
      color: #d40000;
      text-align: center;
      font-size: 34px;
      letter-spacing: 1px;
    }

    .subtitle {
      text-align: center;
      font-size: 18px;
      color: #666;
      margin: 0 20px 20px;
    }

    .content {
      padding: 0 22px;
      font-size: 18px;
      line-height: 1.8;
      text-align: justify;
      color: #333;
    }

    .content p {
      margin-bottom: 15px;
    }

    .news-filter {
      margin: 20px 0;
      text-align: center;
      display: flex;
      justify-content: center;
      gap: 10px;
      flex-wrap: wrap;
    }

    .btn-filter {
      padding: 8px 16px;
      border: 1px solid #1565C0;
      background: white;
      color: #1565C0;
      border-radius: 20px;
      font-weight: bold;
      cursor: pointer;
      transition: 0.2s;
    }

    .btn-filter.active {
      background: #1565C0;
      color: white;
    }

    .news-list {
      display: flex;
      flex-direction: column;
      gap: 15px;
      margin-top: 20px;
    }

    .news-item {
      padding: 15px;
      border: 1px solid #ddd;
      border-radius: 10px;
      background: #fdfdfd;
      transition: 0.2s;
      animation: fade 0.3s ease;
    }

    .news-item:hover {
      transform: translateY(-2px);
      box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    }

    @keyframes fade {
      from {
        opacity: 0;
        transform: translateY(10px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    .tag {
      padding: 4px 8px;
      border-radius: 5px;
      font-size: 12px;
      font-weight: bold;
      display: inline-block;
    }

    .tag-thongbao { background: #e3f2fd; color: #0d47a1; }
    .tag-luuyi { background: #fff3e0; color: #e65100; }

    .news-title {
      margin: 8px 0 5px;
      font-size: 18px;
      font-weight: bold;
    }

    .news-title a {
      color: #1565C0;
      text-decoration: none;
    }

    .news-title a:hover {
      color: #d40000;
    }

    .news-desc {
      margin: 0;
      font-size: 14px;
      color: #555;
    }

    .btn-readmore {
      display: inline-block;
      margin-top: 8px;
      font-size: 13px;
      color: #d40000;
      font-weight: bold;
      text-decoration: none;
    }

    .btn-readmore:hover {
      text-decoration: underline;
    }

    .btn-wrap {
      text-align: center;
      padding-top: 20px;
    }

    .back {
      display: inline-block;
      padding: 12px 22px;
      background: navy;
      color: white;
      text-decoration: none;
      border-radius: 10px;
      font-weight: bold;
      transition: 0.2s ease;
    }

    .back:hover {
      opacity: 0.85;
      transform: translateY(-1px);
    }

    @media (max-width: 600px) {
      .container { padding: 12px; }
      h1 { font-size: 28px; }
      .subtitle, .content { font-size: 16px; }
      .banner { height: 180px; }
    }