:root {
    --bg: #0b0c0f;
    --bg-soft: #14161a;
    --fg: #f5f5f2;
    --fg-muted: #8a8d94;
    --accent: #e4a4b3;
  }

  * {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }

  html, body {
    height: 100%;
  }

  body {
    font-family: "Helvetica Neue", "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic", sans-serif;
    background: radial-gradient(circle at 50% 30%, var(--bg-soft) 0%, var(--bg) 70%);
    color: var(--fg);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 24px;
    overflow: hidden;
  }

  .brand {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 28px;
    animation: fadeIn 1.4s ease-out both;
  }

  .brand-logo-wrap {
    margin: 0;
    font-weight: normal;
    line-height: 0;
  }

  .brand-logo {
    width: min(70vw, 520px);
    height: auto;
  }

  .brand-rule {
    width: 56px;
    height: 1px;
    background: var(--accent);
    opacity: 0.85;
  }

  .product {
    margin-top: 56px;
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 20px 28px;
    border: 1px solid rgba(245, 245, 242, 0.12);
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.02);
    text-decoration: none;
    color: inherit;
    max-width: 440px;
    text-align: left;
    transition: border-color 0.2s ease, background 0.2s ease, transform 0.15s ease;
  }

  .product:hover {
    border-color: var(--accent);
    background: rgba(255, 255, 255, 0.04);
    transform: translateY(-2px);
  }

  .product-icon {
    width: 56px;
    height: 56px;
    flex-shrink: 0;
  }

  .product-name {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 4px;
  }

  .product-desc {
    font-size: 0.82rem;
    color: var(--fg-muted);
    line-height: 1.6;
  }

  .product-link {
    display: inline-block;
    margin-top: 8px;
    font-size: 0.78rem;
    color: var(--accent);
    letter-spacing: 0.02em;
  }

  footer {
    position: absolute;
    bottom: 28px;
    font-size: 0.72rem;
    color: var(--fg-muted);
    letter-spacing: 0.08em;
  }

  @keyframes fadeIn {
    from {
      opacity: 0;
      transform: translateY(12px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }