body {
      margin: 0;
      font-family: Arial, sans-serif;
      background: #0f172a;
      color: #fff;
      text-align: center;
      line-height: 1.6;
      padding-bottom: 80px;
    }
@media (min-width: 768px){
        /* Hero */
    .hero {
      background: #2f4f4f;
      padding: 60px 20px;
    }
    .hero h1 {
      font-size: 2rem;
      font-weight: bold;
      margin-bottom: 15px;
    }
    .hero p {
      font-size: 1.1rem;
      color: #cbd5e1;
      margin-bottom: 30px;
    }
    .features-top {
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 40px;
      max-width: 1000px;
      margin: 0 auto;
    }
    .features-top div {
      text-align: center;
      max-width: 250px;
    }
    .features-top i {
      font-size: 36px;
      color: #facc15;
      margin-bottom: 10px;
    }
}
@media (max-width: 768px){
        /* Hero */
    .hero {
      background: #2f4f4f;
      padding: 1px 5px;
    }
    .hero h1 {
      font-size: 2rem;
      font-weight: bold;
      margin-top: 8px;
      margin-bottom: 5px;
    }
    .hero p {
      font-size: 1.1rem;
      color: #cbd5e1;
      margin-top: 8px;
      margin-bottom: 20px;
      /*margin-bottom: 30px;*/
    }
    .features-top {
      display: none;
      justify-content: center;
      flex-wrap: wrap;
      /*gap: 40px;*/
      max-width: 1000px;
      margin: 0 auto;
    }
    .features-top div {
      text-align: center;
      max-width: 250px;
    }
    .features-top i {
      font-size: 36px;
      color: #facc15;
      margin-bottom: 10px;
    }
}

    /* 用户头像 */
    .user-avatars {
      margin: 40px 0;
    }
    .avatars {
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 12px;
    }
    .avatars img {
      width: 55px;
      height: 55px;
      border-radius: 50%;
      border: 2px solid #fff;
      object-fit: cover;
      transition: transform 0.2s ease;
    }
    .avatars img:hover {
      transform: scale(1.1);
      cursor: pointer;
    }
    .user-text {
      margin-top: 15px;
      font-size: 1rem;
      color: #cbd5e1;
    }

    /* Aktien-Check */
    .stock-check {
      background: #1e293b;
      padding: 50px 20px;
      margin: 40px auto;
      border-radius: 10px;
      max-width: 600px;
    }
    .stock-check h2 {
      margin-bottom: 15px;
    }
    .stock-check input {
      padding: 18px;
      width: 90%;
      max-width: 500px;
      border: none;
      border-radius: 8px;
      font-size: 18px;
      margin-bottom: 15px;
    }
    .stock-check button {
      padding: 18px 25px;
      font-size: 16px;
      font-weight: bold;
      background-color: #25D366;
      color: #fff;
      border: none;
      border-radius: 8px;
      cursor: pointer;
      transition: background 0.3s;
      width: 100%;
      max-width: 500px;
      line-height: 1.4;
    }
    .stock-check button:hover {
      background-color: #1ebe5d;
    }

    /* Investment & KI */
    .info-section {
      background: #f8fafc;
      color: #333;
      padding: 60px 20px;
      text-align: left;
    }
    .info-block {
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 40px auto;
      max-width: 900px;
      flex-wrap: wrap;
    }
    .info-text {
      max-width: 800px;
      padding: 20px;
    }
    .info-text h3 {
      font-size: 1.6rem;
      margin-bottom: 15px;
    }
    .info-text p {
      font-size: 1rem;
      color: #444;
    }

    /* Testimonials (新版样式) */
    .testimonials {
      background: #f8f9fa;
      color: #333;
      padding: 60px 20px;
      text-align: center;
    }
    .testimonials h2 {
      font-size: 1.8rem;
      color: #6b4226;
      margin-bottom: 10px;
    }
    .testimonials p {
      color: #555;
      margin-bottom: 40px;
    }
    .testimonial-cards {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 20px;
      max-width: 1100px;
      margin: 0 auto;
    }
    .testimonial-cards .card {
      background: #fff;
      color: #333;
      border-radius: 10px;
      padding: 20px;
      width: 320px;
      text-align: left;
      box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    }
    .card .name {
      background: #6b7280;
      color: #fff;
      display: inline-block;
      padding: 5px 15px;
      border-radius: 6px;
      font-weight: bold;
      margin-bottom: 15px;
    }

    /* 底部固定 CTA */
    .fixed-cta {
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      background: #25D366;
      color: #fff;
      text-align: center;
      font-size: 18px;
      font-weight: bold;
      padding: 18px 0;
      text-decoration: none;
      z-index: 9999;
      box-shadow: 0 -2px 6px rgba(0,0,0,0.2);
      transition: background 0.3s ease;
    }
    .fixed-cta:hover {
      background: #1ebe5d;
    }