:root {
      --bg: #0a0a0a;
      --bg2: #141414;
      --bg3: #1a1a1a;
      --ink: #ffffff;
      --ink2: #d0d0d0;
      --muted: #777777;
      --border: #2a2a2a;
    }

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
      background: var(--bg);
      color: var(--ink);
      line-height: 1.65;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }

    .container {
      max-width: 800px;
      margin: 0 auto;
      padding: 48px 24px 64px;
    }

    header {
      text-align: center;
      padding: 56px 24px 44px;
      background: linear-gradient(180deg, #141414 0%, #0a0a0a 100%);
      border-radius: 20px;
      margin-bottom: 36px;
      position: relative;
      overflow: hidden;
      border: 1px solid var(--border);
    }

    header::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: 
        radial-gradient(circle at 20% 50%, rgba(255,255,255,0.03) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(255,255,255,0.02) 0%, transparent 50%);
      pointer-events: none;
    }

    header h1 {
      color: var(--ink);
      font-size: 1.75rem;
      font-weight: 600;
      position: relative;
      letter-spacing: 1px;
    }

    header p {
      color: var(--muted);
      font-size: 0.95rem;
      margin-top: 14px;
      position: relative;
    }

    .info-section {
      background: var(--bg2);
      border-radius: 16px;
      padding: 32px 28px;
      margin-bottom: 16px;
      border: 1px solid var(--border);
      transition: all 0.25s ease;
    }

    .info-section:hover {
      border-color: #3a3a3a;
    }

    .info-section h2 {
      color: var(--ink);
      font-size: 1.15rem;
      font-weight: 600;
      margin-bottom: 20px;
      padding-bottom: 14px;
      border-bottom: 1px solid var(--border);
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .info-section h2 .icon {
      width: 28px;
      height: 28px;
      background: var(--bg3);
      border-radius: 6px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.9rem;
      border: 1px solid var(--border);
    }

    .info-section > p {
      color: var(--ink2);
      margin-bottom: 14px;
      line-height: 1.7;
    }

    .info-section h3 {
      color: var(--ink);
      font-size: 1rem;
      margin: 20px 0 14px;
      font-weight: 600;
    }

    .info-section ul {
      list-style: none;
      padding-left: 0;
    }

    .info-section ul li {
      position: relative;
      padding-left: 18px;
      margin-bottom: 10px;
      color: var(--ink2);
      line-height: 1.6;
    }

    .info-section ul li::before {
      content: '→';
      position: absolute;
      left: 0;
      color: var(--muted);
      font-size: 0.85rem;
    }

    .info-section ul li strong {
      color: var(--ink);
    }

    .time-display {
      display: inline-block;
      background: var(--bg3);
      color: var(--ink);
      padding: 5px 14px;
      border-radius: 5px;
      font-weight: 500;
      font-size: 0.9rem;
      border: 1px solid var(--border);
    }

    .highlight-box {
      background: var(--bg3);
      border: 1px solid var(--border);
      padding: 18px 20px;
      border-radius: 10px;
      margin: 16px 0;
    }

    .highlight-box p {
      margin: 0;
      color: var(--ink2);
      line-height: 1.6;
    }

    .highlight-box strong {
      color: var(--ink);
    }

    .steps-container {
      display: grid;
      gap: 10px;
      margin-top: 18px;
    }

    .step-item {
      display: flex;
      align-items: flex-start;
      gap: 14px;
      padding: 16px 18px;
      background: var(--bg3);
      border-radius: 10px;
      transition: all 0.2s ease;
      border: 1px solid transparent;
    }

    .step-item:hover {
      border-color: var(--border);
    }

    .step-number {
      width: 24px;
      height: 24px;
      background: var(--bg2);
      color: var(--ink);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.8rem;
      font-weight: 500;
      flex-shrink: 0;
      border: 1px solid var(--border);
    }

    .step-content h3 {
      font-size: 0.95rem;
      color: var(--ink);
      margin-bottom: 5px;
      font-weight: 500;
    }

    .step-content p {
      font-size: 0.875rem;
      color: var(--muted);
      margin: 0;
      line-height: 1.55;
    }

    .step-content p a {
      color: var(--ink);
      text-decoration: underline;
      text-underline-offset: 2px;
    }

    .accessories-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
      gap: 8px;
      margin-top: 14px;
    }

    .accessory-item {
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 12px 14px;
      background: var(--bg3);
      border-radius: 8px;
      font-size: 0.85rem;
      color: var(--ink2);
      border: 1px solid var(--border);
    }

    .accessory-item.gift {
      background: #1c1c1c;
      border-color: #333;
    }

    .accessory-item .check-icon {
      color: var(--muted);
      font-size: 0.8rem;
    }

    .measure-images {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 14px;
      margin: 20px 0;
    }

    .measure-image-card {
      background: var(--bg3);
      border-radius: 10px;
      padding: 16px;
      text-align: center;
      border: 1px solid var(--border);
    }

    .measure-image-card img {
      max-width: 100%;
      height: auto;
      border-radius: 6px;
    }

    .measure-image-card p {
      margin-top: 12px;
      font-size: 0.8rem;
      color: var(--muted);
      margin-bottom: 0;
    }

    .measure-tips {
      background: var(--bg3);
      border-radius: 10px;
      padding: 16px 20px;
      margin-top: 20px;
      border: 1px solid var(--border);
    }

    .measure-tips h4 {
      color: var(--ink);
      font-size: 0.9rem;
      margin-bottom: 12px;
      font-weight: 500;
    }

    .measure-tips ul li {
      margin-bottom: 8px;
    }

    footer {
      text-align: center;
      padding: 40px 16px 16px;
      color: var(--muted);
      font-size: 0.8rem;
    }

    footer p {
      margin-bottom: 6px;
    }

    footer a {
      color: var(--ink);
      text-decoration: none;
      border-bottom: 1px solid var(--border);
      padding-bottom: 1px;
      transition: border-color 0.2s;
    }

    footer a:hover {
      border-color: var(--ink);
    }

    @media (max-width: 600px) {
      .container {
        padding: 24px 16px 40px;
      }

      header {
        padding: 44px 20px 32px;
        border-radius: 16px;
      }

      header h1 {
        font-size: 1.4rem;
      }

      .info-section {
        padding: 24px 20px;
        border-radius: 14px;
      }

      .info-section h2 {
        font-size: 1.05rem;
      }

      .steps-container {
        gap: 8px;
      }

      .step-item {
        padding: 14px 16px;
      }

      .accessories-grid {
        grid-template-columns: 1fr 1fr;
      }
    }