/* =========================================================================
       SHOWCASE DISPLAY STYLESHEET
       Theme: Mediterranean Citrus Orchard & Sunshine Aromatherapy Car Air Freshener
       Base Background: #f1f4ff (Strictly Enforced)
       Design Standard:
       - No Logo, No Company Name, No Brand Attribution
       - No <a> links, No <button> interactive elements (Pure Showcase Display)
       - All 7 Images Embedded at 100% Uncropped Native Aspect Ratio
       - Responsive Desktop (Multi-Column Grid) & Mobile (Fluid Single-Column)
       - 7-Item Native HTML5 Interactive FAQ Accordion (<details>/<summary>)
       ========================================================================= */

    * {
      box-sizing: border-box;
      -webkit-font-smoothing: antialiased;
    }

    body {
      margin: 0;
      padding: 30px 16px;
      background-color: #f1f4ff;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      color: #1e293b;
      line-height: 1.6;
    }

    .showcase-container {
      max-width: 1040px;
      margin: 0 auto;
      background: #ffffff;
      border-radius: 24px;
      padding: 36px 30px;
      box-shadow: 0 10px 35px rgba(99, 102, 241, 0.07);
      border: 1px solid #e0e7ff;
    }

    /* 1. Hero Header Banner (Warm Citrus & Sunshine Studio Theme) */
    .hero-banner {
      background: linear-gradient(135deg, #fffbeb 0%, #fef3c7 45%, #fff7ed 100%);
      border: 1px solid #fde68a;
      border-radius: 20px;
      padding: 38px 24px;
      text-align: center;
      margin-bottom: 36px;
      box-shadow: 0 6px 20px rgba(217, 119, 6, 0.06);
    }

    .hero-pill {
      display: inline-block;
      background: linear-gradient(135deg, #d97706 0%, #ea580c 100%);
      color: #ffffff;
      font-size: 11px;
      font-weight: 800;
      letter-spacing: 1.5px;
      text-transform: uppercase;
      padding: 5px 16px;
      border-radius: 9999px;
      margin-bottom: 14px;
      box-shadow: 0 2px 8px rgba(217, 119, 6, 0.25);
    }

    .hero-title {
      font-size: 26px;
      font-weight: 900;
      color: #0f172a;
      line-height: 1.3;
      margin: 0 0 12px 0;
      letter-spacing: -0.4px;
    }

    .hero-subtitle {
      font-size: 17px;
      font-weight: 700;
      color: #d97706;
      display: block;
      margin-top: 6px;
    }

    .hero-desc {
      max-width: 820px;
      margin: 0 auto 20px auto;
      font-size: 14px;
      color: #475569;
      line-height: 1.7;
    }

    .hero-tags {
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 8px;
    }

    .hero-tag-item {
      background: #ffffff;
      border: 1px solid #cbd5e1;
      border-radius: 9999px;
      padding: 5px 14px;
      font-size: 12px;
      font-weight: 700;
      color: #334155;
      box-shadow: 0 1px 4px rgba(0,0,0,0.02);
    }

    /* 2. Section Headings */
    .section-header {
      display: flex;
      justify-content: space-between;
      align-items: flex-end;
      margin-bottom: 20px;
      border-bottom: 2px solid #f1f5f9;
      padding-bottom: 12px;
    }

    .section-title {
      font-size: 19px;
      font-weight: 800;
      color: #0f172a;
      border-left: 4px solid #d97706;
      padding-left: 12px;
      margin: 0;
    }

    .section-subtitle {
      font-size: 13px;
      color: #64748b;
      margin: 4px 0 0 16px;
    }

    .section-chip {
      font-size: 11.5px;
      font-weight: 700;
      color: #d97706;
      background: #fef3c7;
      padding: 4px 12px;
      border-radius: 6px;
    }

    /* 3. Workflow Track */
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 14px;
      margin-bottom: 38px;
    }

    .step-card {
      background: #f8fafc;
      border: 1px solid #e2e8f0;
      border-radius: 14px;
      padding: 16px;
    }

    .step-num {
      background: #d97706;
      color: #ffffff;
      width: 24px;
      height: 24px;
      border-radius: 50%;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 12px;
      font-weight: 800;
      margin-right: 8px;
    }

    .step-name {
      font-weight: 800;
      font-size: 13.5px;
      color: #0f172a;
    }

    .step-text {
      font-size: 12px;
      color: #64748b;
      margin-top: 8px;
      line-height: 1.5;
    }

    /* 4. Showcase Gallery (7 Images Uncropped Matrix) */
    .gallery-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 18px;
      margin-bottom: 38px;
    }

    .gallery-card {
      background: #ffffff;
      border: 1px solid #e2e8f0;
      border-radius: 14px;
      overflow: hidden;
      box-shadow: 0 4px 14px rgba(0,0,0,0.03);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .gallery-card-wide {
      grid-column: span 3;
    }

    .gallery-img-wrap {
      background: #f8fafc;
      text-align: center;
      border-bottom: 1px solid #f1f5f9;
      padding: 6px;
    }

    .gallery-img-wrap img {
      width: 100%;
      height: auto;
      display: block;
      border-radius: 8px;
    }

    .gallery-body {
      padding: 16px;
    }

    .card-title {
      font-size: 14.5px;
      font-weight: 800;
      color: #0f172a;
      margin-bottom: 4px;
    }

    .card-desc {
      font-size: 12.5px;
      color: #475569;
      line-height: 1.55;
      margin-bottom: 10px;
    }

    .card-highlight {
      font-size: 11.5px;
      color: #64748b;
      background: #f8fafc;
      padding: 6px 10px;
      border-radius: 6px;
      border-left: 3px solid #d97706;
    }

    /* 5. Specifications Table */
    .specs-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 13px;
      margin-bottom: 38px;
      border: 1px solid #e2e8f0;
      border-radius: 12px;
      overflow: hidden;
    }

    .specs-table th {
      background: #f8fafc;
      padding: 12px 16px;
      font-weight: 800;
      color: #0f172a;
      border-bottom: 2px solid #e2e8f0;
    }

    .specs-table td {
      padding: 11px 16px;
      border-bottom: 1px solid #f1f5f9;
      color: #475569;
    }

    .specs-table tr:last-child td {
      border-bottom: none;
    }

    .specs-table td:first-child {
      font-weight: 700;
      color: #1e293b;
      width: 25%;
      background: #fafafa;
    }

    /* 6. FAQ Accordion (Pure HTML5 Details/Summary) */
    .faq-container {
      display: flex;
      flex-direction: column;
      gap: 12px;
      margin-bottom: 20px;
    }

    details {
      background: #f8fafc;
      border: 1px solid #e2e8f0;
      border-radius: 12px;
      padding: 16px 20px;
      transition: all 0.2s ease;
      cursor: pointer;
    }

    details[open] {
      background: #ffffff;
      border-color: #cbd5e1;
      box-shadow: 0 4px 12px rgba(0,0,0,0.03);
    }

    summary {
      font-size: 14.5px;
      font-weight: 800;
      color: #0f172a;
      list-style: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }

    summary::-webkit-details-marker {
      display: none;
    }

    summary::after {
      content: "+";
      font-size: 18px;
      font-weight: 700;
      color: #d97706;
    }

    details[open] summary::after {
      content: "−";
    }

    .faq-answer {
      margin-top: 12px;
      font-size: 13.5px;
      color: #475569;
      line-height: 1.65;
      border-top: 1px solid #e2e8f0;
      padding-top: 12px;
    }

    /* Responsive Adaptation for Mobile */
    @media (max-width: 860px) {
      .showcase-container {
        padding: 22px 16px;
        border-radius: 18px;
      }
      .steps-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .gallery-grid {
        grid-template-columns: 1fr;
      }
      .gallery-card-wide {
        grid-column: span 1;
      }
      .hero-title {
        font-size: 21px;
      }
      .hero-subtitle {
        font-size: 15px;
      }
      .specs-table td:first-child {
        width: 35%;
      }
    }

    @media (max-width: 520px) {
      .steps-grid {
        grid-template-columns: 1fr;
      }
      .hero-banner {
        padding: 26px 16px;
      }
      .hero-title {
        font-size: 19px;
      }
    }