:root {
      --primary-red: #d32029;
      --primary-red-hover: #b71820;
      --dark-red: #8b0d14;
      --light-red: #fff1f0;
      --border-red: #ffccc7;
      --accent-coral: #ff4d4f;
      --gold-accent: #faad14;
      --text-dark: #1f2328;
      --text-muted: #57606a;
      --text-light: #8c959f;
      --bg-page: #fbfbfc;
      --bg-card: #ffffff;
      --border-subtle: #eaecef;
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 18px;
      --shadow-sm: 0 2px 8px rgba(139, 13, 20, 0.05);
      --shadow-md: 0 8px 24px rgba(139, 13, 20, 0.08);
      --shadow-hover: 0 14px 32px rgba(211, 32, 41, 0.14);
      --container-width: 1220px;
    }

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

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

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

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

    img {
      display: block;
      max-width: 100%;
      height: auto;
    }

    .container {
      width: 100%;
      max-width: var(--container-width);
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    .header-nav {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-subtle);
      box-shadow: var(--shadow-sm);
    }

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

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

    .brand-wrap .ai-page-logo {
      height: 40px;
      width: auto;
      object-fit: contain;
    }

    .brand-name {
      font-size: 20px;
      font-weight: 700;
      color: var(--primary-red);
      letter-spacing: -0.5px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }

    .nav-links li a {
      display: inline-block;
      padding: 8px 14px;
      font-size: 14.5px;
      font-weight: 500;
      color: var(--text-dark);
      border-radius: var(--radius-sm);
    }

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

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

    .btn-nav-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 9px 18px;
      background: linear-gradient(135deg, var(--primary-red), var(--dark-red));
      color: #ffffff !important;
      font-size: 14px;
      font-weight: 600;
      border-radius: var(--radius-sm);
      box-shadow: 0 4px 12px rgba(211, 32, 41, 0.25);
    }

    .btn-nav-primary:hover {
      transform: translateY(-1px);
      box-shadow: 0 6px 16px rgba(211, 32, 41, 0.35);
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: 1px solid var(--border-subtle);
      padding: 8px 12px;
      font-size: 18px;
      border-radius: var(--radius-sm);
      cursor: pointer;
      color: var(--text-dark);
    }

    /* Hero Section - STRICTLY NO IMAGES */
    .hero-section {
      position: relative;
      padding: 72px 0 64px;
      background: radial-gradient(circle at 50% 10%, #fff1f0 0%, #fff8f8 40%, var(--bg-page) 100%);
      border-bottom: 1px solid var(--border-subtle);
      overflow: hidden;
    }

    .hero-inner {
      text-align: center;
      max-width: 960px;
      margin: 0 auto;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background-color: #ffe8e6;
      border: 1px solid var(--border-red);
      color: var(--primary-red);
      padding: 6px 16px;
      border-radius: 999px;
      font-size: 13.5px;
      font-weight: 600;
      margin-bottom: 24px;
    }

    .hero-badge::before {
      content: "";
      width: 8px;
      height: 8px;
      background-color: var(--primary-red);
      border-radius: 50%;
      box-shadow: 0 0 0 3px rgba(211, 32, 41, 0.2);
    }

    .hero-title {
      font-size: 42px;
      font-weight: 800;
      line-height: 1.25;
      color: #111418;
      letter-spacing: -1px;
      margin-bottom: 20px;
    }

    .hero-title span {
      color: var(--primary-red);
    }

    .hero-subtitle {
      font-size: 18px;
      line-height: 1.65;
      color: var(--text-muted);
      margin-bottom: 36px;
      max-width: 820px;
      margin-left: auto;
      margin-right: auto;
    }

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

    .btn-hero-main {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: linear-gradient(135deg, #e60012, #b80f15);
      color: #ffffff !important;
      font-size: 17px;
      font-weight: 700;
      padding: 14px 34px;
      border-radius: 8px;
      box-shadow: 0 10px 24px rgba(230, 0, 18, 0.32);
      transition: all 0.25s ease;
    }

    .btn-hero-main:hover {
      transform: translateY(-2px);
      box-shadow: 0 14px 30px rgba(230, 0, 18, 0.42);
    }

    .btn-hero-secondary {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #ffffff;
      color: var(--text-dark);
      font-size: 16px;
      font-weight: 600;
      padding: 14px 28px;
      border: 1px solid var(--border-subtle);
      border-radius: 8px;
      box-shadow: var(--shadow-sm);
    }

    .btn-hero-secondary:hover {
      border-color: var(--primary-red);
      color: var(--primary-red);
      background: var(--light-red);
    }

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
      margin-top: 12px;
    }

    .hero-stat-card {
      background: #ffffff;
      border: 1px solid var(--border-subtle);
      border-top: 3px solid var(--primary-red);
      padding: 20px 16px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      text-align: center;
      transition: transform 0.25s ease;
    }

    .hero-stat-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
    }

    .stat-num {
      font-size: 28px;
      font-weight: 800;
      color: var(--primary-red);
      line-height: 1.2;
      margin-bottom: 6px;
    }

    .stat-label {
      font-size: 13.5px;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* Common Section Styles */
    .section-wrap {
      padding: 80px 0;
      position: relative;
    }

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

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 52px;
    }

    .section-tag {
      display: inline-block;
      font-size: 12.5px;
      font-weight: 700;
      color: var(--primary-red);
      text-transform: uppercase;
      letter-spacing: 1px;
      background: var(--light-red);
      padding: 4px 12px;
      border-radius: 4px;
      margin-bottom: 12px;
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: #111418;
      letter-spacing: -0.5px;
      margin-bottom: 14px;
    }

    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* About Section */
    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1.15fr;
      gap: 40px;
      align-items: center;
    }

    .about-media-box {
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border-subtle);
      background-color: #ffffff;
    }

    .about-content h3 {
      font-size: 26px;
      font-weight: 700;
      margin-bottom: 16px;
      color: #111418;
    }

    .about-content p {
      font-size: 15.5px;
      color: var(--text-muted);
      line-height: 1.75;
      margin-bottom: 20px;
    }

    .feature-point-list {
      list-style: none;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 14px;
      margin-top: 24px;
    }

    .feature-point-item {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      font-size: 14.5px;
      font-weight: 500;
      color: var(--text-dark);
    }

    .feature-icon-bullet {
      width: 20px;
      height: 20px;
      min-width: 20px;
      background: var(--light-red);
      color: var(--primary-red);
      border-radius: 50%;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 12px;
      font-weight: 700;
    }

    /* Models Matrix */
    .model-tags-box {
      background: #ffffff;
      border: 1px solid var(--border-subtle);
      padding: 32px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      margin-bottom: 40px;
    }

    .model-tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
    }

    .model-chip {
      background: #fafafc;
      border: 1px solid #e1e4e8;
      color: var(--text-dark);
      padding: 7px 16px;
      border-radius: 999px;
      font-size: 13.5px;
      font-weight: 600;
      transition: all 0.2s ease;
    }

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

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

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

    .service-card {
      background: #ffffff;
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
      display: flex;
      flex-direction: column;
    }

    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: var(--border-red);
    }

    .card-badge {
      align-self: flex-start;
      font-size: 12px;
      font-weight: 700;
      color: var(--primary-red);
      background: var(--light-red);
      padding: 3px 8px;
      border-radius: 4px;
      margin-bottom: 14px;
    }

    .service-card h4 {
      font-size: 19px;
      font-weight: 700;
      color: #111418;
      margin-bottom: 10px;
    }

    .service-card p {
      font-size: 14.5px;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

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

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

    .step-number {
      font-size: 28px;
      font-weight: 900;
      color: var(--border-red);
      line-height: 1;
      margin-bottom: 12px;
    }

    .step-item-card h4 {
      font-size: 17.5px;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .step-item-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.55;
    }

    /* Showcase Section with Images */
    .showcase-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .showcase-card {
      background: #ffffff;
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
    }

    .showcase-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-3px);
    }

    .showcase-img-box {
      width: 100%;
      aspect-ratio: 16 / 10;
      overflow: hidden;
      background-color: #f1f3f5;
    }

    .showcase-img-box.square {
      aspect-ratio: 1 / 1;
    }

    .showcase-img-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }

    .showcase-card:hover .showcase-img-box img {
      transform: scale(1.03);
    }

    .showcase-body {
      padding: 20px;
    }

    .showcase-body h4 {
      font-size: 17.5px;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .showcase-body p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.55;
    }

    /* Comparison Section */
    .eval-highlight-box {
      background: linear-gradient(135deg, #fff5f5 0%, #ffffff 100%);
      border: 2px solid var(--border-red);
      border-radius: var(--radius-md);
      padding: 28px 32px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
      margin-bottom: 36px;
      box-shadow: var(--shadow-sm);
    }

    .eval-score-wrap {
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .score-circle {
      width: 80px;
      height: 80px;
      background: var(--primary-red);
      color: #ffffff;
      border-radius: 50%;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      box-shadow: 0 6px 18px rgba(211, 32, 41, 0.3);
    }

    .score-val {
      font-size: 26px;
      font-weight: 900;
      line-height: 1;
    }

    .score-max {
      font-size: 11px;
      opacity: 0.9;
    }

    .eval-text h3 {
      font-size: 22px;
      font-weight: 800;
      color: #111418;
      margin-bottom: 6px;
    }

    .eval-stars {
      color: var(--gold-accent);
      font-size: 18px;
      letter-spacing: 2px;
    }

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

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 680px;
    }

    .compare-table th,
    .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-subtle);
      font-size: 14.5px;
    }

    .compare-table th {
      background: #fafbfc;
      color: var(--text-dark);
      font-weight: 700;
    }

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

    .col-highlight {
      background: #fffafa;
      color: var(--primary-red);
      font-weight: 700;
    }

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

    .testimonial-content {
      font-size: 14.5px;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 18px;
      position: relative;
    }

    .testimonial-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f1f3f5;
      padding-top: 14px;
    }

    .author-avatar-text {
      width: 42px;
      height: 42px;
      background: var(--light-red);
      color: var(--primary-red);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 15px;
    }

    .author-name {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-dark);
    }

    .author-role {
      font-size: 12.5px;
      color: var(--text-light);
    }

    /* FAQ Accordion */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-sm);
      margin-bottom: 12px;
      overflow: hidden;
      transition: border-color 0.2s ease;
    }

    .faq-item.active {
      border-color: var(--border-red);
    }

    .faq-question {
      padding: 18px 22px;
      font-size: 16px;
      font-weight: 600;
      color: var(--text-dark);
      display: flex;
      align-items: center;
      justify-content: space-between;
      cursor: pointer;
      user-select: none;
    }

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

    .faq-icon {
      font-size: 20px;
      color: var(--text-light);
      transition: transform 0.25s ease;
    }

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

    .faq-answer {
      display: none;
      padding: 0 22px 20px;
      font-size: 14.5px;
      color: var(--text-muted);
      line-height: 1.7;
      border-top: 1px solid #fafafa;
    }

    .faq-item.active .faq-answer {
      display: block;
    }

    /* Form & Contact Section */
    .contact-grid {
      display: grid;
      grid-template-columns: 1.2fr 1fr;
      gap: 36px;
      align-items: start;
    }

    .contact-form-card {
      background: #ffffff;
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }

    .form-group {
      margin-bottom: 18px;
    }

    .form-label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      color: var(--text-dark);
      margin-bottom: 6px;
    }

    .form-input,
    .form-select,
    .form-textarea {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid #d0d7de;
      border-radius: var(--radius-sm);
      font-size: 14.5px;
      background: #ffffff;
      color: var(--text-dark);
      outline: none;
      transition: border-color 0.2s ease;
      font-family: inherit;
    }

    .form-input:focus,
    .form-select:focus,
    .form-textarea:focus {
      border-color: var(--primary-red);
      box-shadow: 0 0 0 3px rgba(211, 32, 41, 0.1);
    }

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

    .btn-form-submit {
      width: 100%;
      padding: 14px;
      background: linear-gradient(135deg, var(--primary-red), var(--dark-red));
      color: #ffffff;
      font-size: 16px;
      font-weight: 700;
      border: none;
      border-radius: var(--radius-sm);
      cursor: pointer;
      box-shadow: 0 4px 14px rgba(211, 32, 41, 0.25);
      transition: all 0.25s ease;
    }

    .btn-form-submit:hover {
      transform: translateY(-1px);
      box-shadow: 0 6px 18px rgba(211, 32, 41, 0.35);
    }

    .contact-info-card {
      background: #ffffff;
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }

    .info-list-block {
      margin-bottom: 24px;
    }

    .info-item {
      display: flex;
      margin-bottom: 12px;
      font-size: 14.5px;
    }

    .info-label {
      width: 110px;
      font-weight: 600;
      color: var(--text-dark);
    }

    .info-val {
      color: var(--text-muted);
      flex: 1;
    }

    .kefu-qr-box {
      text-align: center;
      padding: 16px;
      background: #fffafa;
      border: 1px dashed var(--border-red);
      border-radius: var(--radius-sm);
      max-width: 220px;
      margin: 0 auto;
    }

    .kefu-qr-box img {
      max-width: 160px;
      margin: 0 auto 8px;
      border-radius: 4px;
    }

    .kefu-qr-box p {
      font-size: 13px;
      font-weight: 600;
      color: var(--primary-red);
    }

    /* News & Articles */
    .article-wrap-box {
      background: #ffffff;
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 24px 32px;
      box-shadow: var(--shadow-sm);
    }

    .article-list {
      list-style: none;
    }

    .article-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 14px 0;
      border-bottom: 1px solid #f0f2f5;
    }

    .article-item:last-child {
      border-bottom: none;
    }

    .article-title-link {
      font-size: 15px;
      color: var(--text-dark);
      font-weight: 500;
    }

    .article-title-link:hover {
      color: var(--primary-red);
    }

    .article-arrow {
      color: var(--text-light);
      font-size: 14px;
    }

    /* Footer */
    .site-footer {
      background-color: #1a1e24;
      color: #c9d1d9;
      padding: 56px 0 28px;
      border-top: 3px solid var(--primary-red);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1fr;
      gap: 32px;
      margin-bottom: 40px;
    }

    .footer-col h5 {
      font-size: 16px;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 16px;
      position: relative;
      padding-bottom: 8px;
    }

    .footer-col h5::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 0;
      width: 24px;
      height: 2px;
      background-color: var(--primary-red);
    }

    .footer-desc {
      font-size: 13.5px;
      line-height: 1.65;
      color: #8b949e;
      margin-bottom: 16px;
    }

    .footer-links-list {
      list-style: none;
    }

    .footer-links-list li {
      margin-bottom: 9px;
    }

    .footer-links-list a {
      font-size: 13.5px;
      color: #8b949e;
    }

    .footer-links-list a:hover {
      color: #ffffff;
      padding-left: 4px;
    }

    .friend-links-area {
      border-top: 1px solid #2d333b;
      padding-top: 24px;
      margin-bottom: 24px;
    }

    .friend-links-title {
      font-size: 13.5px;
      font-weight: 700;
      color: #8b949e;
      margin-bottom: 10px;
    }

    .friend-links-flex {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
    }

    .friend-links-flex a {
      font-size: 13px;
      color: #8b949e;
    }

    .friend-links-flex a:hover {
      color: #ffffff;
    }

    .footer-bottom {
      border-top: 1px solid #282e36;
      padding-top: 20px;
      text-align: center;
      font-size: 13px;
      color: #6e7681;
    }

    /* Floating tool */
    .float-panel {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 46px;
      height: 46px;
      background: #ffffff;
      border: 1px solid var(--border-subtle);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--text-dark);
      box-shadow: var(--shadow-md);
      cursor: pointer;
      transition: all 0.2s ease;
      font-size: 18px;
    }

    .float-btn:hover {
      background: var(--primary-red);
      color: #ffffff;
      border-color: var(--primary-red);
    }

    /* Responsive */
    @media (max-width: 992px) {
      .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-chain-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .about-grid {
        grid-template-columns: 1fr;
      }
      .contact-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .nav-links {
        display: none;
      }
      .mobile-menu-btn {
        display: block;
      }
      .nav-links.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        border-bottom: 1px solid var(--border-subtle);
        padding: 16px 20px;
        box-shadow: var(--shadow-md);
      }
      .nav-links.active li {
        width: 100%;
      }
      .nav-links.active li a {
        width: 100%;
        padding: 10px 0;
      }
    }

    @media (max-width: 640px) {
      .hero-title {
        font-size: 28px;
      }
      .hero-subtitle {
        font-size: 15px;
      }
      .hero-stats-grid {
        grid-template-columns: 1fr;
      }
      .grid-3, .grid-4, .showcase-grid, .step-chain-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .eval-highlight-box {
        flex-direction: column;
        text-align: center;
      }
      .eval-score-wrap {
        flex-direction: column;
      }
    }