@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR&display=swap');
 body {
  margin: 0;
  background: #f9f9f9;  /* 浅灰米色背景 */
  font-family: 'Noto Sans KR', 'Noto Sans', sans-serif;
  color: #4A4A4A;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  padding: 40px 20px;
}
    .container {
      max-width: 720px;
      margin: 0 auto;
      background: #FFFFFF;
      border-radius: 14px;
      box-shadow: 0 6px 18px rgba(0,0,0,0.07);
      padding: 40px 35px;
    }
    header {
      text-align: center;
      margin-bottom: 48px;
    }
    header h1 {
      font-weight: 700;
      font-size: 2.8rem;
      color: #375E97;
      margin-bottom: 12px;
    }
    header p {
      font-size: 1.1rem;
      color: #7A7A7A;
      letter-spacing: 0.03em;
    }
    .cert-logos {
      display: flex;
      justify-content: center;
      gap: 36px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }
    .cert-logos img {
      max-height: 70px;
      filter: drop-shadow(0 1px 2px rgba(0,0,0,0.08));
      transition: transform 0.25s ease;
      cursor: pointer;
      border-radius: 8px;
      background: #F8F8F8;
      padding: 8px;
    }
    .cert-logos img:hover {
      transform: translateY(-4px) scale(1.05);
      filter: drop-shadow(0 4px 8px rgba(55,94,151,0.3));
    }
    section.description {
      font-size: 1.15rem;
      color: #555555;
      text-align: center;
      margin-bottom: 48px;
      padding: 0 10px;
      line-height: 1.7;
    }
    section.features {
      margin-bottom: 48px;
    }
    section.features h2 {
      font-weight: 600;
      font-size: 1.7rem;
      color: #375E97;
      margin-bottom: 28px;
      text-align: center;
      letter-spacing: 0.03em;
    }
    section.features ul {
      list-style-type: none;
      padding: 0;
      margin: 0 auto;
      max-width: 480px;
    }
    section.features ul li {
      position: relative;
      padding-left: 26px;
      font-size: 1.05rem;
      margin-bottom: 18px;
      color: #4A4A4A;
    }
    section.features ul li::before {
      content: "✔";
      position: absolute;
      left: 0;
      top: 50%;
      transform: translateY(-50%);
      color: #375E97;
      font-weight: 700;
      font-size: 1.2rem;
      line-height: 1;
    }
  .btn-contact {
  display: block;
  max-width: 220px;
  margin: 0 auto;
  padding: 14px 32px;
  background-color: #000000; /* 黑色背景 */
  color: white;
  font-weight: 700;
  font-size: 1.1rem;
  border-radius: 30px;
  text-align: center;
  text-decoration: none;
  transition: background-color 0.3s ease;
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.3);
  cursor: pointer;
}
.btn-contact:hover {
  background-color: #333333; /* 深灰色悬停 */
  box-shadow: 0 8px 16px rgba(51, 51, 51, 0.6);
}

    .btn-contact:hover {
      background-color: #264769;
      box-shadow: 0 8px 16px rgba(38, 71, 105, 0.6);
    }

    @media (max-width: 480px) {
      .container {
        padding: 30px 20px;
      }
      header h1 {
        font-size: 2.1rem;
      }
      section.features ul {
        max-width: 100%;
      }
      .cert-logos img {
        max-height: 50px;
        padding: 6px;
      }
    }