* { margin: 0; padding: 0; box-sizing: border-box; }
    body {
      min-height: 100vh;
      min-height: 100svh;
      display: flex;
      flex-direction: column;
      background: linear-gradient(90deg, #d4ebf8 0%, #ffffff 100%);
      color: #1a1a1a;
      font-family: "PingFang SC", "Microsoft YaHei", -apple-system, sans-serif;
      font-size: 16px;
      line-height: 2.0;
      transition: color 0.4s;
    }
    #particles { position: fixed; inset: 0; width: 100%; height: 100%; z-index: 0; pointer-events: none; }
    .site-header {
      position: relative;
      z-index: 1;
      width: 100%;
      max-width: 1088px;
      margin: 0 auto;
      padding: 22px 32px;
      display: flex;
      align-items: center;
      justify-content: flex-end;
      gap: 32px;
    }
    nav { display: flex; align-items: center; gap: 32px; }
    a { color: inherit; text-decoration: none; }
    nav a { color: #555; padding: 6px 0; border-bottom: 1px solid transparent; }
    nav a:hover, nav a[aria-current="page"] { color: #1a1a1a; border-bottom-color: currentColor; }
    a:focus-visible, button:focus-visible { outline: 2px solid #426a8a; outline-offset: 6px; }
    .theme-toggle {
      flex: 0 0 44px;
      width: 44px;
      height: 44px;
      border: 1px solid #bdcdd8;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.55);
      font-size: 18px;
      cursor: pointer;
    }
    main {
      position: relative;
      z-index: 1;
      flex: 1;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      width: 100%;
      max-width: 704px;
      margin: 0 auto;
      padding: 64px 24px 112px;
      text-align: center;
    }
    h1 { font-size: 44px; font-weight: 600; line-height: 1.4; letter-spacing: 0.02em; margin-bottom: 20px; }
    p { font-size: 16px; line-height: 2.0; color: #555; }
    .eyebrow { margin-bottom: 12px; }
    .page-content { margin-top: 28px; }
    .mark { margin-top: 56px; font-size: 12px; color: #677786; letter-spacing: 0.12em; }
    .works-page { max-width: 1088px; padding-left: 32px; padding-right: 32px; }
    .project { width: 100%; }
    .project + .project { margin-top: 96px; }
    .project img { display: block; width: 100%; height: auto; }
    .project-intro { max-width: 656px; margin: 32px auto 48px; }
    .project-intro h2 { font-size: 32px; font-weight: 600; line-height: 1.4; letter-spacing: 0.02em; margin-bottom: 16px; }
    .project-gallery { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr)); gap: 24px; }
    body.dark { background: linear-gradient(90deg, #211a38 0%, #110d1e 100%); color: #f0ecf7; }
    body.dark p, body.dark nav a { color: #b2a9c6; }
    body.dark nav a:hover, body.dark nav a[aria-current="page"] { color: #f0ecf7; }
    body.dark .theme-toggle { background: rgba(56, 47, 80, 0.75); border-color: #4a3f66; }
    body.dark .mark { color: #a49bb8; }
    body.dark a:focus-visible, body.dark button:focus-visible { outline-color: #cddd92; }
    @media (max-width: 480px) {
      .site-header { justify-content: center; gap: 24px; padding: 18px 20px; }
      nav { gap: 24px; }
      main { padding: 48px 24px 80px; }
    }
    @media (width < 640px) {
      body { line-height: 1.8; }
      .site-header { justify-content: center; gap: 20px; padding-left: 20px; padding-right: 20px; }
      nav { justify-content: center; gap: 20px; font-size: 14px; }
      main { padding-left: 20px; padding-right: 20px; }
      h1 { font-size: 28px; }
      p { font-size: 16px; line-height: 1.8; }
      p + p, .page-content { margin-top: 24px; }
      .works-page { padding-left: 20px; padding-right: 20px; }
      .project + .project { margin-top: 64px; }
      .project-intro { margin: 24px auto; }
      .project-intro h2 { font-size: 24px; }
      .project-gallery { grid-template-columns: 1fr; }
    }
    @media (prefers-reduced-motion: reduce) { body { transition: none; } }