:root {
      --primary: #d92534;
      --primary-dark: #b51a27;
      --primary-light: #ff4d5a;
      --primary-tint: #fff1f2;
      --primary-gradient: linear-gradient(135deg, #e62e3d 0%, #b81423 100%);
      --accent: #ff7a00;
      --bg-main: #faf9f9;
      --bg-card: #ffffff;
      --text-main: #1f2937;
      --text-muted: #4b5563;
      --text-light: #9ca3af;
      --border-color: #fee2e2;
      --border-subtle: #f3f4f6;
      --shadow-sm: 0 2px 8px rgba(217, 37, 52, 0.06);
      --shadow-md: 0 8px 24px rgba(217, 37, 52, 0.08);
      --shadow-lg: 0 16px 36px rgba(217, 37, 52, 0.12);
      --radius: 12px;
      --radius-sm: 6px;
      --radius-lg: 20px;
      --container-width: 1200px;
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

    /* Standard Outer Container */
    .container {
      width: 100%;
      max-width: var(--container-width);
      margin: 0 auto;
      padding: 0 20px;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.25s ease;
    }

    ul, ol {
      list-style: none;
    }

    /* Section Typography */
    .section-header {
      text-align: center;
      margin-bottom: 48px;
    }

    .section-badge {
      display: inline-block;
      padding: 5px 14px;
      background: var(--primary-tint);
      color: var(--primary);
      font-size: 0.85rem;
      font-weight: 600;
      border-radius: 999px;
      margin-bottom: 12px;
      border: 1px solid #fecdd3;
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: #111827;
      margin-bottom: 14px;
      letter-spacing: -0.5px;
    }

    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      max-width: 680px;
      margin: 0 auto;
    }

    /* Header & Navigation */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

    .nav-brand {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .nav-brand img {
      max-height: 42px;
      width: auto;
    }

    .nav-brand span {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -0.5px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0; /* Strictly required by specification */
    }

    .nav-links a {
      padding: 8px 14px;
      font-size: 0.92rem;
      font-weight: 500;
      color: var(--text-main);
      border-radius: 6px;
    }

    .nav-links a:hover {
      color: var(--primary);
      background-color: var(--primary-tint);
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .btn-outline {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 9px 18px;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--primary);
      background: #ffffff;
      border: 1.5px solid var(--primary);
      border-radius: var(--radius-sm);
      cursor: pointer;
    }

    .btn-outline:hover {
      background: var(--primary-tint);
      color: var(--primary-dark);
      border-color: var(--primary-dark);
    }

    .btn-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.92rem;
      font-weight: 600;
      color: #ffffff !important;
      background: var(--primary-gradient);
      border: none;
      border-radius: var(--radius-sm);
      box-shadow: 0 4px 14px rgba(217, 37, 52, 0.3);
      cursor: pointer;
    }

    .btn-primary:hover {
      opacity: 0.95;
      transform: translateY(-1px);
      box-shadow: 0 6px 20px rgba(217, 37, 52, 0.4);
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 1.6rem;
      color: var(--primary);
      cursor: pointer;
    }

    /* Section Base */
    .page-section {
      padding: 80px 0;
      position: relative;
    }

    .section-tinted {
      background-color: #ffffff;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }

    /* Hero Section (No Images in Hero per strict rule) */
    .hero-section {
      padding: 90px 0 70px 0;
      background: radial-gradient(circle at 50% 20%, #fff0f1 0%, #faf9f9 70%);
      text-align: center;
      position: relative;
      overflow: hidden;
    }

    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #ffffff;
      border: 1px solid #fecdd3;
      padding: 6px 18px;
      border-radius: 999px;
      color: var(--primary);
      font-size: 0.88rem;
      font-weight: 600;
      box-shadow: var(--shadow-sm);
      margin-bottom: 24px;
    }

    .hero-tag-dot {
      width: 8px;
      height: 8px;
      background: var(--primary);
      border-radius: 50%;
      animation: pulse 1.8s infinite;
    }

    @keyframes pulse {
      0%, 100% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.4; transform: scale(1.3); }
    }

    .hero-title {
      font-size: 2.8rem;
      font-weight: 900;
      line-height: 1.25;
      color: #111827;
      margin-bottom: 20px;
      letter-spacing: -0.8px;
    }

    .hero-subtitle {
      font-size: 1.2rem;
      color: var(--text-muted);
      max-width: 780px;
      margin: 0 auto 36px auto;
      line-height: 1.7;
    }

    .hero-cta-group {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      margin-bottom: 48px;
      flex-wrap: wrap;
    }

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      max-width: 980px;
      margin: 0 auto;
    }

    .stat-card {
      background: #ffffff;
      padding: 24px 16px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      text-align: center;
      transition: transform 0.25s ease;
    }

    .stat-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }

    .stat-number {
      font-size: 2rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
    }

    .stat-label {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* Grid Layouts */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
      align-items: center;
    }

    /* Standard Content Cards */
    .feature-card {
      background: #ffffff;
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
    }

    .feature-card:hover {
      border-color: #fecdd3;
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }

    .feature-icon-box {
      width: 52px;
      height: 52px;
      border-radius: 12px;
      background: var(--primary-tint);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      margin-bottom: 18px;
    }

    .feature-card h3 {
      font-size: 1.25rem;
      font-weight: 700;
      color: #111827;
      margin-bottom: 10px;
    }

    .feature-card p {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    .feature-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      margin-top: 16px;
    }

    .feature-tag {
      font-size: 0.78rem;
      background: #fdf2f2;
      color: var(--primary-dark);
      padding: 3px 8px;
      border-radius: 4px;
      border: 1px solid #fee2e2;
    }

    /* Workflow Steps */
    .step-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .step-card {
      background: #ffffff;
      padding: 28px 20px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      position: relative;
    }

    .step-number {
      width: 38px;
      height: 38px;
      border-radius: 50%;
      background: var(--primary-gradient);
      color: #ffffff;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 16px;
      font-size: 1.1rem;
    }

    .step-card h4 {
      font-size: 1.15rem;
      font-weight: 700;
      color: #111827;
      margin-bottom: 8px;
    }

    .step-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* Comparison Table Component */
    .review-score-banner {
      background: var(--primary-gradient);
      border-radius: var(--radius);
      padding: 36px;
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 32px;
      box-shadow: 0 12px 30px rgba(217, 37, 52, 0.25);
    }

    .score-left h3 {
      font-size: 1.8rem;
      font-weight: 800;
      margin-bottom: 8px;
    }

    .score-left p {
      font-size: 1rem;
      opacity: 0.9;
    }

    .score-right {
      text-align: right;
    }

    .stars-display {
      font-size: 1.5rem;
      letter-spacing: 4px;
      color: #ffd166;
      margin-bottom: 4px;
    }

    .score-badge {
      font-size: 2.6rem;
      font-weight: 900;
      line-height: 1;
    }

    .score-max {
      font-size: 1.1rem;
      opacity: 0.85;
    }

    .table-container {
      background: #ffffff;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      overflow-x: auto;
      box-shadow: var(--shadow-sm);
    }

    .comparison-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.95rem;
    }

    .comparison-table th, .comparison-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-subtle);
    }

    .comparison-table th {
      background: #fdf2f2;
      color: #111827;
      font-weight: 700;
    }

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

    .highlight-cell {
      background: #fff8f8;
      font-weight: 600;
      color: var(--primary-dark);
    }

    .badge-check {
      color: #10b981;
      font-weight: 800;
    }

    .badge-cross {
      color: #ef4444;
      font-weight: 800;
    }

    /* Model Matrix / Chips */
    .model-chip-grid {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 24px;
    }

    .model-chip {
      background: #ffffff;
      border: 1px solid #fed7aa;
      padding: 8px 16px;
      border-radius: 30px;
      font-size: 0.88rem;
      font-weight: 600;
      color: #9a3412;
      box-shadow: 0 2px 4px rgba(0,0,0,0.02);
      transition: all 0.2s ease;
    }

    .model-chip:hover {
      background: var(--primary);
      color: #ffffff;
      border-color: var(--primary);
      transform: translateY(-2px);
    }

    /* Media & Case Center */
    .case-card {
      background: #ffffff;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: transform 0.3s ease;
      display: flex;
      flex-direction: column;
    }

    .case-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }

    .case-img-wrap {
      width: 100%;
      background: #f3f4f6;
      display: flex;
      align-items: center;
      justify-content: center;
      overflow: hidden;
    }

    .case-img-wrap img {
      width: 100%;
      height: auto;
      display: block;
      transition: transform 0.4s ease;
    }

    .case-card:hover .case-img-wrap img {
      transform: scale(1.03);
    }

    .case-info {
      padding: 20px;
      flex-grow: 1;
    }

    .case-info h4 {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 8px;
      color: #111827;
    }

    .case-info p {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* Testimonials / User Reviews */
    .testimonial-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      position: relative;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .testimonial-header {
      display: flex;
      align-items: center;
      gap: 14px;
      margin-bottom: 16px;
    }

    .avatar-placeholder {
      width: 46px;
      height: 46px;
      border-radius: 50%;
      background: var(--primary-gradient);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.1rem;
    }

    .user-info h5 {
      font-size: 1rem;
      font-weight: 700;
      color: #111827;
    }

    .user-info span {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    .testimonial-body {
      font-size: 0.92rem;
      color: #374151;
      line-height: 1.65;
    }

    .testimonial-stars {
      color: #f59e0b;
      margin-top: 12px;
      font-size: 0.9rem;
    }

    /* FAQ Accordion */
    .faq-wrapper {
      max-width: 880px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .faq-question {
      width: 100%;
      text-align: left;
      padding: 18px 24px;
      background: none;
      border: none;
      font-size: 1.05rem;
      font-weight: 700;
      color: #111827;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }

    .faq-question:hover {
      color: var(--primary);
    }

    .faq-icon {
      font-size: 1.2rem;
      color: var(--primary);
      transition: transform 0.3s ease;
    }

    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out;
      background: #fffafa;
    }

    .faq-answer p {
      padding: 0 24px 20px 24px;
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* Form Section */
    .form-wrapper {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-md);
    }

    .form-group {
      margin-bottom: 20px;
    }

    .form-label {
      display: block;
      font-size: 0.92rem;
      font-weight: 600;
      margin-bottom: 8px;
      color: #374151;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1.5px solid #e5e7eb;
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      color: var(--text-main);
      background-color: #fdfdfd;
      transition: border-color 0.2s ease;
    }

    .form-control:focus {
      outline: none;
      border-color: var(--primary);
      background-color: #ffffff;
    }

    textarea.form-control {
      resize: vertical;
      min-height: 110px;
    }

    /* Articles Block */
    .article-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 28px;
      box-shadow: var(--shadow-sm);
    }

    .article-links-list {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 16px;
    }

    .article-link-item {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 8px 16px;
      background: #f9fafb;
      border: 1px solid #e5e7eb;
      border-radius: 6px;
      font-size: 0.88rem;
      color: #374151;
    }

    .article-link-item:hover {
      background: var(--primary-tint);
      color: var(--primary);
      border-color: #fecdd3;
    }

    /* Contact Details & QR */
    .contact-card-grid {
      display: grid;
      grid-template-columns: 1.3fr 1fr;
      gap: 32px;
    }

    .contact-info-list {
      display: flex;
      flex-direction: column;
      gap: 18px;
    }

    .contact-item {
      display: flex;
      align-items: flex-start;
      gap: 14px;
    }

    .contact-icon {
      width: 40px;
      height: 40px;
      border-radius: 8px;
      background: var(--primary-tint);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      flex-shrink: 0;
    }

    .contact-meta h5 {
      font-size: 0.95rem;
      font-weight: 700;
      color: #111827;
    }

    .contact-meta p {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    .qr-showcase {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      text-align: center;
      box-shadow: var(--shadow-sm);
    }

    .qr-img-box {
      width: 170px;
      height: 170px;
      margin: 0 auto 16px auto;
      border: 1px solid #fecdd3;
      border-radius: 8px;
      overflow: hidden;
      padding: 8px;
      background: #fff;
    }

    .qr-img-box img {
      width: 100%;
      height: 100%;
      object-fit: contain;
    }

    /* Footer */
    .site-footer {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 50px 0 24px 0;
      color: var(--text-muted);
      font-size: 0.9rem;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 36px;
      margin-bottom: 40px;
    }

    .footer-col h4 {
      font-size: 1rem;
      font-weight: 700;
      color: #111827;
      margin-bottom: 16px;
    }

    .footer-links-col {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-links-col a:hover {
      color: var(--primary);
    }

    .footer-friendly-links {
      border-top: 1px solid var(--border-subtle);
      padding: 20px 0;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 16px;
      font-size: 0.85rem;
    }

    .footer-friendly-links span {
      font-weight: 700;
      color: #374151;
    }

    .footer-friendly-links a {
      color: var(--text-muted);
    }

    .footer-friendly-links a:hover {
      color: var(--primary);
    }

    .footer-bottom {
      border-top: 1px solid var(--border-subtle);
      padding-top: 20px;
      text-align: center;
      font-size: 0.85rem;
      color: var(--text-light);
    }

    /* Floating Widget */
    .floating-widget {
      position: fixed;
      right: 24px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .floating-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      cursor: pointer;
      font-size: 1.2rem;
      transition: all 0.25s ease;
    }

    .floating-btn:hover {
      background: var(--primary);
      color: #ffffff;
      transform: scale(1.08);
    }

    /* Responsive */
    @media (max-width: 992px) {
      .hero-title { font-size: 2.2rem; }
      .hero-stats-grid { grid-template-columns: repeat(2, 1fr); }
      .grid-3 { grid-template-columns: repeat(2, 1fr); }
      .grid-4 { grid-template-columns: repeat(2, 1fr); }
      .step-grid { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .contact-card-grid { grid-template-columns: 1fr; }
      .review-score-banner { flex-direction: column; text-align: center; gap: 20px; }
      .score-right { text-align: center; }
      
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: 0 10px 20px rgba(0,0,0,0.05);
      }
      .nav-links.active {
        display: flex;
      }
      .mobile-menu-btn {
        display: block;
      }
    }

    @media (max-width: 640px) {
      .hero-title { font-size: 1.75rem; }
      .hero-subtitle { font-size: 1rem; }
      .grid-3, .grid-4, .grid-2, .step-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
      .form-wrapper { padding: 24px 16px; }
      .hero-stats-grid { grid-template-columns: 1fr; }
    }