/* 整体样式 – 仅用于内容区域，无多余 head/body 标签 */
  .seaheart-event * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  .seaheart-event {
    font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    line-height: 1.6;
    color: #1e2b3c;
    background-color: #ffffff;
    max-width: 1280px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
  }
  h1 {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
    color: #0b1e33;
  }
  h2 {
    font-size: 1.85rem;
    font-weight: 600;
    margin-top: 2.5rem;
    margin-bottom: 1.25rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid #eaeef2;
    color: #13324b;
  }
  h3 {
    font-size: 1.35rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: #1f3a57;
  }
  .meta-info {
    font-size: 1rem;
    color: #5e6f7e;
    background: #f5f8fa;
    padding: 0.9rem 1.5rem;
    border-radius: 2rem;
    display: inline-block;
    margin-bottom: 2rem;
    border: 1px solid #dde5ea;
  }
  .lead-text {
    font-size: 1.2rem;
    color: #2a4055;
    background: #f9fbfd;
    padding: 1.5rem 2rem;
    border-radius: 28px;
    margin: 1.8rem 0 1.5rem 0;
    border-left: 5px solid #1a73e8;
    box-shadow: 0 4px 12px rgba(0,0,0,0.02);
  }
  .machine-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.8rem;
    margin: 2rem 0 2.5rem 0;
  }
  .machine-card {
    background: #fafcff;
    border-radius: 24px;
    padding: 1.5rem 1.5rem 1.8rem 1.5rem;
    border: 1px solid #e2e9f2;
    transition: box-shadow 0.2s;
    box-shadow: 0 4px 12px rgba(0, 30, 60, 0.03);
  }
  .machine-card:hover {
    box-shadow: 0 12px 24px rgba(26, 115, 232, 0.08);
    border-color: #cbdae9;
  }
  .machine-card strong {
    font-size: 1.25rem;
    color: #0b2b44;
    display: block;
    margin-bottom: 0.6rem;
  }
  .machine-card p {
    color: #2c4a6e;
    font-size: 0.98rem;
    margin-bottom: 0;
  }
  /* 极简图片占位：仅尺寸与极淡背景，无边框、无多余文字 */
  .image-placeholder-simple {
    width: 100%;
    max-width: 1500px;
    aspect-ratio: 1 / 1;
    background: #f4f8fd;
    margin: 2.5rem auto;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #9bb0c5;
    font-size: 1rem;
    font-weight: 300;
    letter-spacing: 0.5px;
  }
  .checklist {
    list-style: none;
    margin: 1.8rem 0 2.2rem 0;
  }
  .checklist li {
    margin-bottom: 1rem;
    padding-left: 2rem;
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="%231a73e8"><path d="M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41L9 16.17z"/></svg>') left center no-repeat;
    background-size: 1.2rem;
  }
  .event-highlight {
    background: #e9eff8;
    border-radius: 30px;
    padding: 1.8rem 2.2rem;
    margin: 2.5rem 0;
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    justify-content: space-between;
    align-items: center;
  }
  .event-highlight p {
    font-size: 1.15rem;
    font-weight: 500;
  }
  .event-highlight strong {
    color: #0f3a68;
    font-size: 1.2rem;
  }
  .btn-demo {
    background: #1a73e8;
    color: white;
    padding: 0.8rem 2.2rem;
    border-radius: 40px;
    text-decoration: none;
    font-weight: 600;
    letter-spacing: 0.3px;
    border: 1px solid #0d62d1;
    display: inline-block;
    transition: 0.2s;
  }
  .btn-demo:hover {
    background: #0d5bc6;
  }
  .footer-quote {
    margin-top: 3.5rem;
    font-size: 1.6rem;
    font-weight: 300;
    color: #132f4b;
    text-align: center;
    border-top: 1px solid #cfdeed;
    padding-top: 2.5rem;
    font-style: italic;
  }
  hr {
    border: none;
    border-top: 1px solid #d6e2ed;
    margin: 1.5rem 0;
  }