.product-desc {
    --accent: #0e7a5a;
    --accent-soft: #e4f4ee;
    --accent-wash: #f0faf6;
    --neutral-bg: #f7f8f8;
    --neutral-surface: #ffffff;
    --neutral-border: #e2e5e7;
    --text-strong: #1e262b;
    --text-body: #424b52;
    --text-muted: #6a737a;
    --warning-bg: #fff8e7;
    --warning-border: #e8b93f;
    --warning-text: #3d3418;
    --radius-s: 8px;
    --radius-m: 14px;
    --radius-l: 20px;
    --font-sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", "Roboto", "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  }
  .product-desc *,
  .product-desc *::before,
  .product-desc *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }
  .product-desc {
    font-family: var(--font-sans);
    background: var(--neutral-bg);
    color: var(--text-body);
    padding: 1.5rem 1.25rem;
    line-height: 1.7;
    font-size: 1rem;
    border: 1px solid var(--neutral-border);
    border-radius: var(--radius-l);
  }
  /* base headings */
  .product-desc h2 {
    font-size: 1.4rem;
    font-weight: 650;
    letter-spacing: -0.01em;
    color: var(--text-strong);
    line-height: 1.4;
    margin-block: 0.2rem 1.25rem;
    border-inline-start: 4px solid var(--accent);
    padding-inline-start: 0.9rem;
  }
  .product-desc h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-strong);
    margin-block: 0 0.75rem;
  }
  .product-desc p {
    margin-block: 0.6rem 0;
  }
  .product-desc ul,
  .product-desc ol {
    padding-inline-start: 1.4rem;
    margin-block: 0.6rem 0;
  }
  .product-desc li {
    margin-block: 0.25rem;
  }
  .product-desc a {
    color: var(--accent);
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 3px;
    transition: text-decoration-color 0.15s ease, color 0.15s ease;
    font-weight: 500;
  }
  .product-desc a:hover {
    text-decoration-color: currentColor;
    text-decoration-thickness: 2px;
  }
  .product-desc a:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
    border-radius: 4px;
  }
  /* sections */
  .product-desc section {
    margin-block: 2.2rem 0;
  }
  /* overview */
  .product-desc .overview-lead {
    font-size: 1.05rem;
    background: var(--accent-wash);
    padding: 1.1rem 1.25rem;
    border-radius: var(--radius-m);
    border: 1px solid var(--neutral-border);
    color: var(--text-body);
  }
  .product-desc .highlight-strip {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    margin-block: 1.4rem 0.2rem;
  }
  .product-desc .fact-pill {
    background: var(--neutral-surface);
    border: 1px solid var(--neutral-border);
    border-radius: 999px;
    padding: 0.5rem 1rem;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-strong);
    box-shadow: 0 1px 2px rgba(0,0,0,0.02);
  }
  .product-desc .fact-pill svg {
    width: 18px;
    height: 18px;
    stroke: var(--accent);
    flex-shrink: 0;
  }
  /* feature grid */
  .product-desc .feature-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    margin-block: 1.4rem 0;
  }
  .product-desc .feature-card {
    background: var(--neutral-surface);
    border: 1px solid var(--neutral-border);
    border-radius: var(--radius-m);
    padding: 1.15rem 1.2rem;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    box-shadow: 0 2px 5px rgba(0,0,0,0.02);
    transition: box-shadow 0.15s ease, border-color 0.15s ease;
  }
  .product-desc .feature-card:hover {
    border-color: var(--accent);
    box-shadow: 0 4px 10px rgba(14,122,90,0.06);
  }
  .product-desc .feature-icon {
    background: var(--accent-soft);
    border-radius: 10px;
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-block-end: 0.5rem;
  }
  .product-desc .feature-icon svg {
    width: 24px;
    height: 24px;
    stroke: var(--accent);
    stroke-width: 1.8;
  }
  .product-desc .feature-card h3 {
    margin-block-end: 0.25rem;
  }
  .product-desc .feature-card p {
    font-size: 0.93rem;
    color: var(--text-muted);
    line-height: 1.6;
  }
  /* specs group */
  .product-desc .specs-wrap {
    background: var(--neutral-surface);
    border: 1px solid var(--neutral-border);
    border-radius: var(--radius-m);
    padding: 1.1rem 1.2rem;
    margin-block: 1.4rem 0;
  }
  .product-desc .spec-group {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.6rem;
    margin-block-end: 1rem;
  }
  .product-desc .spec-row {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    padding-block: 0.4rem;
    border-bottom: 1px dashed var(--neutral-border);
    font-size: 0.95rem;
  }
  .product-desc .spec-row:last-child {
    border-bottom: 0;
  }
  .product-desc .spec-label {
    color: var(--text-muted);
    font-weight: 450;
  }
  .product-desc .spec-value {
    color: var(--text-strong);
    font-weight: 560;
    text-align: start;
  }
  .product-desc .spec-highlight .spec-value {
    background: var(--accent-soft);
    padding: 0.1rem 0.5rem;
    border-radius: 20px;
    color: var(--accent);
    font-weight: 650;
  }
  /* compatibility chips */
  .product-desc .compat-section {
    background: var(--neutral-bg);
  }
  .product-desc .chip-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    margin-block: 1rem 0;
    padding: 0;
    list-style: none;
  }
  .product-desc .chip {
    background: var(--neutral-surface);
    border: 1px solid var(--neutral-border);
    padding: 0.35rem 1rem;
    border-radius: 999px;
    font-size: 0.9rem;
    color: var(--text-strong);
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
  }
  .product-desc .chip svg {
    width: 16px;
    height: 16px;
    stroke: var(--accent);
  }
  /* advantages check panel */
  .product-desc .adv-panel {
    background: var(--neutral-surface);
    border: 1px solid var(--neutral-border);
    border-radius: var(--radius-m);
    padding: 1.3rem 1.4rem;
    box-shadow: 0 2px 6px rgba(0,0,0,0.02);
  }
  .product-desc .adv-list {
    list-style: none;
    padding: 0;
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.8rem;
  }
  .product-desc .adv-item {
    display: flex;
    align-items: flex-start;
    gap: 0.7rem;
  }
  .product-desc .adv-item svg {
    width: 22px;
    height: 22px;
    min-width: 22px;
    stroke: var(--accent);
    margin-top: 0.2rem;
  }
  .product-desc .adv-item span {
    color: var(--text-body);
    font-weight: 500;
  }
  /* installation steps */
  .product-desc .steps-list {
    list-style: none;
    counter-reset: steps;
    padding: 0;
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    margin-block: 1.5rem 0;
  }
  .product-desc .step-item {
    counter-increment: steps;
    display: flex;
    gap: 1rem;
    background: var(--neutral-surface);
    border: 1px solid var(--neutral-border);
    border-radius: var(--radius-m);
    padding: 1rem 1.2rem;
    align-items: flex-start;
    transition: border-color 0.15s ease;
  }
  .product-desc .step-item:hover {
    border-color: var(--accent);
  }
  .product-desc .step-index::before {
    content: counter(steps, decimal-leading-zero);
    font-weight: 700;
    font-size: 1.3rem;
    line-height: 1;
    color: var(--accent);
    background: var(--accent-soft);
    border-radius: var(--radius-s);
    width: 2.5rem;
    height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
  }
  .product-desc .step-body h3 {
    margin-block: 0.1rem 0.2rem;
    font-size: 1rem;
  }
  .product-desc .step-body p {
    font-size: 0.92rem;
    color: var(--text-muted);
  }
  /* warning callout */
  .product-desc .callout-warn {
    background: var(--warning-bg);
    border: 1px solid var(--warning-border);
    border-inline-start: 5px solid var(--warning-border);
    border-radius: var(--radius-m);
    padding: 1.1rem 1.3rem;
    display: flex;
    gap: 0.8rem;
    align-items: flex-start;
    margin-block: 1.5rem 0;
  }
  .product-desc .callout-warn svg {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
    stroke: #a5721b;
    margin-top: 0.15rem;
  }
  .product-desc .callout-warn h3 {
    margin-block-end: 0.25rem;
    color: #3d3418;
    font-weight: 650;
  }
  .product-desc .callout-warn ul {
    margin-block: 0.3rem 0;
    padding-inline-start: 1.2rem;
    color: var(--warning-text);
  }
  .product-desc .callout-warn li {
    margin-block: 0.25rem;
  }
  /* FAQ */
  .product-desc .faq-wrap {
    margin-block: 1.2rem 0;
    border-radius: var(--radius-m);
    overflow: hidden;
  }
  .product-desc details.faq-item {
    background: var(--neutral-surface);
    border: 1px solid var(--neutral-border);
    border-radius: var(--radius-m);
    margin-block-end: 0.75rem;
    padding: 0.5rem 1rem;
    transition: border-color 0.15s ease;
  }
  .product-desc details.faq-item:hover {
    border-color: var(--accent);
  }
  .product-desc details summary {
    cursor: pointer;
    font-weight: 600;
    color: var(--text-strong);
    padding: 0.5rem 0;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    font-size: 1rem;
  }
  .product-desc details summary::-webkit-details-marker {
    display: none;
  }
  .product-desc details summary::after {
    content: "+";
    font-size: 1.6rem;
    line-height: 1;
    margin-inline-start: auto;
    color: var(--accent);
    font-weight: 400;
  }
  .product-desc details[open] summary::after {
    content: "−";
  }
  .product-desc details .faq-answer {
    padding-block: 0.25rem 0.75rem;
    color: var(--text-body);
    border-top: 1px dashed var(--neutral-border);
    margin-top: 0.25rem;
  }
  .product-desc details .faq-answer p {
    margin-block: 0.5rem 0;
  }

  /* responsive + layout variations */
  @media (min-width: 600px) {
    .product-desc {
      padding: 2rem 2rem;
    }
    .product-desc .feature-grid {
      grid-template-columns: repeat(2, 1fr);
      gap: 1.2rem;
    }
    .product-desc .spec-group {
      grid-template-columns: 1fr 1fr;
      column-gap: 1.8rem;
    }
    .product-desc .adv-list {
      grid-template-columns: 1fr 1fr;
    }
    .product-desc .steps-list {
      grid-template-columns: 1fr;
    }
  }
  @media (min-width: 900px) {
    .product-desc .feature-grid {
      grid-template-columns: repeat(3, 1fr);
      gap: 1.5rem;
    }
    .product-desc .highlight-strip {
      gap: 1rem;
    }
    .product-desc .spec-group {
      grid-template-columns: 1fr 1fr;
    }
    .product-desc .adv-list {
      grid-template-columns: repeat(2, 1fr);
    }
    .product-desc .steps-list {
      grid-template-columns: 1fr 1fr;
      gap: 1.2rem;
    }
  }

  /* ================================================================
     Product description templates — compact sales + collapsed SEO
     ================================================================ */
  #pol-wp-product-content > .phd {
    flex: 0 0 100%;
    max-width: 100%;
    width: 100%;
    padding: 0.15rem 0.35rem 0.35rem;
  }
  .phd {
    --phd-accent: #0e7a5a;
    --phd-accent-soft: #e4f4ee;
    --phd-accent-wash: #f0faf6;
    --phd-surface: #ffffff;
    --phd-border: #d8ddd9;
    --phd-text: #424b52;
    --phd-text-strong: #1e262b;
    --phd-text-muted: #6a737a;
    --phd-warn-bg: #fffbeb;
    --phd-warn-border: #e8b93f;
    --phd-warn-text: #3d3418;
    --phd-radius: 14px;
    --phd-ease: cubic-bezier(0.23, 1, 0.32, 1);

    box-sizing: border-box;
    width: 100%;
    color: var(--phd-text);
    color-scheme: light;
    font-size: 0.95rem;
    line-height: 1.7;
    text-align: start;
    isolation: isolate;
  }
  .phd *,
  .phd *::before,
  .phd *::after {
    box-sizing: border-box;
  }
  .phd__sr {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
  }
  .phd svg {
    width: 18px !important;
    height: 18px !important;
    max-width: 18px !important;
    flex-shrink: 0;
    display: block;
  }
  .phd a {
    color: var(--phd-accent) !important;
    text-decoration: underline !important;
    text-decoration-thickness: 1px;
    text-underline-offset: 3px;
    font-weight: 600;
    touch-action: manipulation;
    -webkit-tap-highlight-color: rgba(14, 122, 90, 0.18);
    transition: text-decoration-thickness 160ms var(--phd-ease),
      text-underline-offset 160ms var(--phd-ease),
      color 160ms var(--phd-ease);
  }
  .phd a:focus-visible {
    outline: 2px solid var(--phd-accent);
    outline-offset: 2px;
    border-radius: 4px;
  }
  .phd__more-body p {
    margin: 0;
  }
  .phd__model {
    unicode-bidi: isolate;
    overflow-wrap: anywhere;
  }
  .phd__icon {
    display: grid;
    place-items: center;
    width: 28px;
    height: 28px;
    flex-shrink: 0;
    border-radius: 8px;
    background: var(--phd-accent-wash);
    color: var(--phd-accent);
  }
  .phd__icon svg {
    width: 15px !important;
    height: 15px !important;
    max-width: 15px !important;
    display: block;
  }
  .phd__chevron {
    display: grid;
    place-items: center;
    width: 28px;
    height: 28px;
    flex-shrink: 0;
    border-radius: 8px;
    background: var(--phd-accent-soft);
    color: var(--phd-accent);
    transform-box: fill-box;
    transform-origin: center;
    transition: transform 180ms var(--phd-ease);
  }
  .phd__chevron svg {
    width: 14px !important;
    height: 14px !important;
    max-width: 14px !important;
    display: block;
  }
  .phd__more[open] > summary .phd__chevron,
  .phd__faq-item[open] > summary .phd__chevron {
    transform: rotate(180deg);
  }

  /* --- Hero (parent #pol-wp-product-content is already a card) --- */
  .phd__hero {
    background: transparent;
    border: 0;
    border-radius: 0;
    padding: 0 0 0.75rem;
    text-align: start;
    box-shadow: none;
  }
  .phd .phd__hero-badge {
    display: inline-block;
    background: var(--phd-accent);
    color: #fff;
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    padding: 0.2rem 0.65rem;
    border-radius: 999px;
    margin: 0 0 0.5rem;
  }
  .phd__hero-title {
    font-size: 1.12rem;
    font-weight: 800;
    color: var(--phd-text-strong);
    line-height: 1.4;
    letter-spacing: -0.02em;
    margin: 0;
    border: 0;
    padding: 0;
    text-wrap: pretty;
    overflow-wrap: anywhere;
  }
  .phd .phd__hero-sub {
    font-size: 0.86rem;
    color: var(--phd-text-muted);
    margin: 0.45rem 0 0;
    max-width: 65ch;
    overflow-wrap: anywhere;
  }

  /* --- Compact info row --- */
  .phd__compact-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 0.55rem;
    margin: 0.55rem 0 0;
    padding: 0;
    list-style: none;
  }
  .phd__compact-item {
    min-width: 0;
    display: flex;
    align-items: center;
    gap: 0.55rem;
    margin: 0;
    background: var(--phd-accent-wash);
    border: 0;
    border-radius: 10px;
    padding: 0.7rem 0.85rem;
    font-size: 0.84rem;
    font-weight: 600;
    line-height: 1.4;
    color: var(--phd-text-strong);
    overflow: hidden;
  }
  .phd__compact-item > span:last-child {
    min-width: 0;
    overflow-wrap: anywhere;
  }

  /* --- Warning callout --- */
  .phd__warn {
    display: flex;
    gap: 0.65rem;
    align-items: flex-start;
    background: var(--phd-warn-bg);
    border: 0;
    border-inline-start: 3px solid var(--phd-warn-border);
    border-radius: 10px;
    padding: 0.8rem 0.9rem;
    margin-top: 0.7rem;
    font-size: 0.84rem;
    line-height: 1.55;
    color: var(--phd-warn-text);
  }
  .phd__warn .phd__icon {
    background: #f6e7bf;
    color: #8a5c12;
    margin-top: 0.05rem;
  }
  .phd__warn p {
    min-width: 0;
    overflow-wrap: anywhere;
  }

  /* --- Collapsed SEO guide (indexed, does not push the buy button) --- */
  .phd__more {
    margin-top: 0.7rem;
    background: var(--phd-surface);
    border: 1px solid var(--phd-border);
    border-radius: 12px;
  }
  .phd__more > summary,
  .phd__faq-item > summary {
    cursor: pointer;
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.65rem;
    min-height: 44px;
    font-weight: 700;
    color: var(--phd-text-strong);
    user-select: none;
    touch-action: manipulation;
    -webkit-tap-highlight-color: rgba(14, 122, 90, 0.18);
    transition: background-color 140ms var(--phd-ease),
      transform 100ms ease-out;
  }
  .phd__more > summary {
    padding: 0.55rem 0.9rem;
    font-size: 0.9rem;
    border-radius: inherit;
  }
  .phd__more[open] > summary {
    border-radius: var(--phd-radius) var(--phd-radius) 0 0;
  }
  .phd__more > summary::-webkit-details-marker,
  .phd__faq-item > summary::-webkit-details-marker,
  .phd__more > summary::marker,
  .phd__faq-item > summary::marker {
    display: none;
    content: "";
  }
  .phd__more-label,
  .phd__faq-item > summary > span {
    min-width: 0;
    overflow-wrap: anywhere;
    text-wrap: pretty;
  }
  .phd__more > summary:focus:not(:focus-visible),
  .phd__faq-item > summary:focus:not(:focus-visible) {
    outline: none;
  }
  .phd__more > summary:focus-visible,
  .phd__faq-item > summary:focus-visible {
    outline: 2px solid var(--phd-accent);
    outline-offset: -2px;
  }
  .phd__more-body {
    padding: 0.85rem 1.1rem 1.15rem;
    border-top: 1px dashed var(--phd-border);
  }
  .phd__more-body h3 {
    margin: 1rem 0 0.5rem;
    font-size: 1rem;
    font-weight: 750;
    color: var(--phd-text-strong);
    line-height: 1.4;
    scroll-margin-top: 5.5rem;
    text-wrap: pretty;
    overflow-wrap: anywhere;
  }
  .phd__more-body > h3:first-child {
    margin-top: 0;
  }
  .phd__more-body p,
  .phd__more-body li {
    font-size: 0.9rem;
    line-height: 1.7;
    color: var(--phd-text);
    overflow-wrap: anywhere;
  }
  .phd__more-body p + p {
    margin-top: 0.55rem;
  }
  .phd__more-body ul,
  .phd__more-body ol {
    margin: 0.4rem 0 0.6rem;
    padding-inline-start: 1.15rem;
  }
  .phd__figure {
    margin: 0.75rem 0;
    text-align: center;
  }
  .phd__figure img {
    width: 100%;
    max-width: 600px;
    height: auto;
    border: 1px solid var(--phd-border);
    border-radius: 10px;
  }
  .phd__figure figcaption {
    margin-top: 0.4rem;
    font-size: 0.8rem;
    color: var(--phd-text-muted);
  }
  .phd__faq {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-top: 0.65rem;
  }
  .phd__faq-item {
    border: 1px solid var(--phd-border);
    border-radius: 10px;
    background: var(--phd-accent-wash);
  }
  .phd__faq-item > summary {
    padding: 0.55rem 0.75rem;
    font-weight: 650;
    font-size: 0.86rem;
    border-radius: inherit;
  }
  .phd__faq-item[open] > summary {
    border-radius: 10px 10px 0 0;
  }
  .phd__faq-item .phd__chevron {
    width: 24px;
    height: 24px;
    background: var(--phd-surface);
  }
  .phd__faq-item p {
    padding: 0 0.85rem 0.85rem;
    margin: 0;
    font-size: 0.86rem;
    color: var(--phd-text);
    overflow-wrap: anywhere;
  }

  @media (hover: hover) and (pointer: fine) {
    .phd a:hover {
      text-decoration-thickness: 2px;
      text-underline-offset: 4px;
    }
    .phd__more > summary:hover,
    .phd__faq-item > summary:hover {
      background: var(--phd-accent-wash);
    }
  }
  .phd__more > summary:active,
  .phd__faq-item > summary:active {
    transform: scale(0.99);
  }

  @media (min-width: 600px) {
    .phd__hero-title {
      font-size: 1.2rem;
    }
  }
  @media (prefers-reduced-motion: reduce) {
    .phd,
    .phd *,
    .phd *::before,
    .phd *::after {
      animation: none !important;
      transition-duration: 0.01ms !important;
      scroll-behavior: auto !important;
    }
    .phd__more > summary:active,
    .phd__faq-item > summary:active {
      transform: none;
    }
  }