.guide-article {
    --guide-border: #e2e8f0;
    --guide-soft: #f8fafc;
    --guide-blue-soft: #eff6ff;
    --guide-blue: #2563eb;
    --guide-navy: #0f172a;
  }

  .guide-article #sample,
  .guide-article #points,
  .guide-article #usage,
  .guide-article #unclear {
    scroll-margin-top: 96px;
  }

  .guide-article__intro {
    max-width: 900px;
    margin: 0 auto;
    color: #475569;
    font-size: 1rem;
    line-height: 2;
  }

  .guide-article__media {
    max-width: 980px;
    margin: 2rem auto 0;
    overflow: hidden;
    border-radius: 18px;
    box-shadow: 0 12px 28px rgba(15, 23, 42, .10);
    background: #e2e8f0;
  }

  .guide-article__media img {
    display: block;
    width: 100%;
    height: auto;
  }

  .guide-article__caption {
    margin-top: .6rem;
    color: #64748b;
    font-size: .78rem;
    line-height: 1.7;
    text-align: center;
  }

  .guide-summary {
    max-width: 900px;
    margin: 2rem auto 0;
    padding: 1.25rem 1.35rem;
    border: 1px solid #dbeafe;
    border-radius: 14px;
    background: #eff6ff;
  }

  .guide-summary__title {
    color: #1d4ed8;
    font-size: .9rem;
    font-weight: 900;
    letter-spacing: .03em;
  }

  .guide-summary ul {
    margin-top: .7rem;
    display: grid;
    gap: .45rem;
  }

  .guide-summary li {
    position: relative;
    padding-left: 1.25rem;
    color: #334155;
    font-size: .92rem;
    line-height: 1.75;
  }

  .guide-summary li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #2563eb;
    font-weight: 900;
  }

  .guide-sample-wrap {
    margin-top: 1.5rem;
    overflow-x: auto;
    border: 1px solid var(--guide-border);
    border-radius: 14px;
    background: #fff;
    box-shadow: 0 8px 22px rgba(15, 23, 42, .05);
  }

  .guide-sample {
    width: 100%;
    min-width: 800px;
    border-collapse: collapse;
  }

  .guide-sample caption {
    padding: 1rem 1.1rem .7rem;
    color: #64748b;
    font-size: .78rem;
    text-align: left;
  }

  .guide-sample th,
  .guide-sample td {
    border-top: 1px solid #e2e8f0;
    border-right: 1px solid #e2e8f0;
    padding: .85rem .8rem;
    vertical-align: top;
    text-align: left;
    font-size: .86rem;
    line-height: 1.7;
  }

  .guide-sample th:last-child,
  .guide-sample td:last-child {
    border-right: 0;
  }

  .guide-sample thead th {
    border-top: 0;
    background: #0f172a;
    color: #fff;
    font-weight: 700;
    white-space: nowrap;
  }

  .guide-sample tbody tr:nth-child(even) {
    background: #f8fafc;
  }

  .guide-sample__tc {
    white-space: nowrap;
    font-family: "Share Tech Mono", monospace;
    color: #0f172a;
    font-weight: 700;
  }

  .guide-sample__note {
    color: #7c3aed;
    font-size: .8rem;
  }

  .guide-points {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
    margin-top: 1.5rem;
  }

  .guide-point {
    padding: 1.25rem 1.3rem;
    border: 1px solid var(--guide-border);
    border-radius: 14px;
    background: #fff;
  }

  .guide-point__num {
    display: inline-flex;
    width: 2rem;
    height: 2rem;
    align-items: center;
    justify-content: center;
    margin-bottom: .7rem;
    border-radius: 50%;
    background: #eff6ff;
    color: #2563eb;
    font-family: "Montserrat", sans-serif;
    font-size: .78rem;
    font-weight: 700;
  }

  .guide-point h3 {
    color: #0f172a;
    font-size: 1rem;
    font-weight: 900;
    line-height: 1.6;
  }

  .guide-point p {
    margin-top: .45rem;
    color: #64748b;
    font-size: .88rem;
    line-height: 1.8;
  }

  .guide-point--wide {
    grid-column: 1 / -1;
  }

  .guide-explain {
    max-width: 900px;
    margin: 1.5rem auto 0;
    color: #475569;
    font-size: .96rem;
    line-height: 1.95;
  }

  .guide-callout {
    max-width: 900px;
    margin: 1.5rem auto 0;
    padding: 1.15rem 1.3rem;
    border-left: 4px solid #3b82f6;
    border-radius: 0 12px 12px 0;
    background: #f8fafc;
    color: #475569;
    font-size: .9rem;
    line-height: 1.85;
  }

  .guide-usage-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
    margin-top: 1.5rem;
  }

  .guide-usage {
    padding: 1.25rem;
    border: 1px solid var(--guide-border);
    border-radius: 14px;
    background: #fff;
  }

  .guide-usage__label {
    color: #2563eb;
    font-size: .76rem;
    font-weight: 900;
  }

  .guide-usage h3 {
    margin-top: .35rem;
    color: #0f172a;
    font-size: .98rem;
    font-weight: 900;
    line-height: 1.6;
  }

  .guide-usage p {
    margin-top: .45rem;
    color: #64748b;
    font-size: .86rem;
    line-height: 1.8;
  }

  .guide-related {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
    margin-top: 1.5rem;
  }

  .guide-related a {
    display: flex;
    min-height: 140px;
    flex-direction: column;
    padding: 1.2rem;
    border: 1px solid var(--guide-border);
    border-radius: 14px;
    background: #fff;
    transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
  }

  .guide-related a:hover {
    transform: translateY(-3px);
    border-color: #bfdbfe;
    box-shadow: 0 12px 26px rgba(15, 23, 42, .08);
  }

  .guide-related__tag {
    color: #2563eb;
    font-size: .73rem;
    font-weight: 900;
  }

  .guide-related__title {
    margin-top: .45rem;
    color: #0f172a;
    font-size: .93rem;
    font-weight: 900;
    line-height: 1.65;
  }

  .guide-related__more {
    margin-top: auto;
    padding-top: .8rem;
    color: #2563eb;
    font-size: .8rem;
    font-weight: 700;
  }

  @media (max-width: 767px) {
    .guide-points,
    .guide-usage-grid,
    .guide-related {
      grid-template-columns: 1fr;
    }

    .guide-point--wide {
      grid-column: auto;
    }

    .guide-article__media {
      border-radius: 12px;
    }

    .guide-sample-wrap {
      margin-left: -.25rem;
      margin-right: -.25rem;
    }
  }