* {
      margin: 0; padding: 0; box-sizing: border-box;
      font-family: 'Poppins', sans-serif;
    }
    body {
      background: #f9fbfd;
      color: #222;
      line-height: 1.6;
      min-height: 100vh;
      font-size: 16px;
    }
    header {
      background: #1a73e8;
      padding: 1rem 2rem;
      color: white;
      display: flex;
      justify-content: space-between;
      align-items: center;
      position: sticky;
      top: 0;
      box-shadow: 0 3px 10px rgba(26,115,232,0.3);
      z-index: 10;
    }
    header h1 {
      font-size: 1.8rem;
    }
    nav a {
      margin-left: 20px;
      text-decoration: none;
      color: white;
      font-weight: 600;
      transition: color 0.3s ease;
    }
    nav a:hover {
      color: #bbdefb;
    }
    .hero {
      background: url('https://images.unsplash.com/photo-1504384308090-c894fdcc538d?auto=format&fit=crop&w=1600&q=80') center/cover no-repeat;
      height: 60vh;
      display: flex;
      justify-content: center;
      align-items: center;
      color: #fff;
      text-align: center;
      position: relative;
    }
    .hero::after {
      content: "";
      position: absolute;
      inset: 0;
      background-color: rgba(0,0,0,0.55);
      z-index: 0;
    }
    .hero h2 {
      position: relative;
      font-size: 2.8rem;
      max-width: 900px;
      padding: 0 1rem;
      z-index: 1;
      text-shadow: 0 2px 6px rgba(0,0,0,0.7);
    }
    .main-content {
      max-width: 1200px;
      margin: 2rem auto 1rem;
      padding: 0 1rem;
      display: flex;
      gap: 3rem;
      justify-content: space-between;
      flex-wrap: nowrap;
    }
    .left-side {
      flex: 1 1 55%;
      background: #ffffff;
      padding: 2rem;
      border-radius: 12px;
      box-shadow: 0 5px 15px rgba(26,115,232,0.1);
    }
    .left-side h3 {
      font-size: 2rem;
      margin-bottom: 1rem;
      color: #1a73e8;
    }
    .left-side p {
      font-size: 1.1rem;
      margin-bottom: 1.5rem;
      color: #444;
    }
    .course-list {
      background: #e8f0fe;
      padding: 1.5rem 2rem;
      border-radius: 8px;
      box-shadow: 0 3px 7px rgba(26,115,232,0.3);
      color: #1a237e;
    }
    .course-list h4 {
      font-size: 1.4rem;
      margin-bottom: 1rem;
      color: #0d47a1;
    }
    .course-list ul {
      list-style: disc inside;
      font-size: 1.05rem;
      line-height: 1.6;
      margin-bottom: 1.5rem;
    }
    .read-more-btn {
      display: inline-block;
      background-color: #1a73e8;
      color: white;
      padding: 10px 24px;
      border-radius: 6px;
      font-weight: 600;
      text-decoration: none;
      transition: background-color 0.3s ease;
    }
    .read-more-btn:hover {
      background-color: #0d47a1;
    }
    .right-side {
      flex: 1 1 40%;
      background: #fff;
      border-radius: 12px;
      box-shadow: 0 10px 20px rgba(26,115,232,0.2);
      padding: 2rem 2.5rem;
      text-align: center;
      position: relative;
      display: flex;
      align-items: center;
      justify-content: center;
      min-height: 250px;
    }
    .announcement {
      font-size: 1.3rem;
      line-height: 1.4;
      position: absolute;
      width: 90%;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%) translateY(20px);
      opacity: 0;
      transition: opacity 1s ease, transform 1s ease;
      user-select: none;
      pointer-events: none;
      color: #1a237e;
      font-weight: 600;
      text-shadow: 0 1px 2px rgba(255,255,255,0.8);
    }
    .announcement.active {
      opacity: 1;
      pointer-events: auto;
      transform: translate(-50%, -50%) translateY(0);
    }
    .announcement.active::before {
      content: '';
      position: absolute;
      top: 50%; left: 50%;
      width: 130%;
      height: 130%;
      background: #bbdefb;
      filter: blur(30px);
      opacity: 0.25;
      border-radius: 15px;
      transform: translate(-50%, -50%);
      z-index: -1;
    }
    .video-card {
      max-width: 1200px;
      margin: 2rem auto;
      padding: 1rem;
      background: #ffffff;
      border-radius: 12px;
      box-shadow: 0 6px 18px rgba(26,115,232,0.1);
    }
    .video-card h3 {
      color: #1a73e8;
      text-align: center;
      margin-bottom: 1.5rem;
    }
    .video-row {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 2rem;
    }
    .video-col {
      flex: 1 1 400px;
      max-width: 500px;
      text-align: center;
    }
    .video-col iframe {
      width: 100%;
      height: 300px;
      border: none;
      border-radius: 12px;
    }
    .video-col p {
      margin-top: 0.5rem;
      font-weight: 600;
      color: #1a237e;
    }
    .mission-tab {
      max-width: 1200px;
      margin: 2rem auto;
      padding: 2rem;
      background: #e3f2fd;
      border-radius: 12px;
      box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    }
    .mission-tab h3 {
      font-size: 2rem;
      margin-bottom: 1rem;
      color: #0d47a1;
      text-align: center;
    }
    .mission-tab p {
      font-size: 1.1rem;
      color: #333;
      text-align: center;
    }
    @media (max-width: 900px) {
      .main-content {
        flex-direction: column;
        gap: 2rem;
      }
      .left-side, .right-side {
        max-width: 100%;
        flex: 1 1 100%;
        height: auto;
        padding: 1.5rem;
      }
      .right-side {
        min-height: 180px;
      }
      .announcement {
        position: relative !important;
        opacity: 1 !important;
        transform: none !important;
        pointer-events: auto !important;
        text-shadow: none;
      }
      .announcement.active::before {
        display: none;
      }
      .video-col iframe {
        height: 240px;
      }
    }