:root {
      --primary: #059669;
      --primary-light: #10b981;
      --primary-tint: #ecfdf5;
      --primary-dark: #047857;
      --mint-bg: #f2fbf7;
      --surface: #ffffff;
      --surface-subtle: #f8fafc;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-light: #64748b;
      --border: #e2e8f0;
      --border-accent: #a7f3d0;
      --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
      --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
      --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
      --shadow-glow: 0 10px 25px -5px rgba(16, 185, 129, 0.2);
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --max-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(--mint-bg);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

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

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

    /* Header & Navigation */
    .header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background-color: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(8px);
      border-bottom: 1px solid var(--border);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 70px;
    }

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

    .brand-logo-wrap {
      max-height: 38px;
      display: flex;
      align-items: center;
    }

    .brand-logo-wrap img {
      max-height: 38px;
      width: auto;
      object-fit: contain;
    }

    .brand-name {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--primary-dark);
      letter-spacing: -0.5px;
    }

    .nav-menu {
      display: flex;
      align-items: center;
    }

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

    .nav-links li a {
      font-size: 0.925rem;
      font-weight: 500;
      color: var(--text-muted);
      padding: 8px 12px;
      border-radius: var(--radius-sm);
      display: block;
    }

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

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 9px 20px;
      font-size: 0.925rem;
      font-weight: 600;
      border-radius: var(--radius-md);
      cursor: pointer;
      transition: all 0.25s ease;
      border: 1px solid transparent;
      text-align: center;
      line-height: 1.4;
    }

    .btn-primary {
      background-color: var(--primary);
      color: #ffffff;
      box-shadow: var(--shadow-sm);
    }

    .btn-primary:hover {
      background-color: var(--primary-dark);
      box-shadow: var(--shadow-glow);
      transform: translateY(-1px);
      color: #ffffff;
    }

    .btn-outline {
      background-color: #ffffff;
      border-color: var(--border-accent);
      color: var(--primary-dark);
    }

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

    .btn-lg {
      padding: 12px 28px;
      font-size: 1.05rem;
    }

    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--text-main);
      cursor: pointer;
      padding: 6px;
    }

    /* Hero Section (No Image per rule) */
    .hero-section {
      padding: 80px 0 60px;
      background: linear-gradient(180deg, rgba(236, 253, 245, 0.6) 0%, rgba(242, 251, 247, 0) 100%);
      text-align: center;
      position: relative;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background-color: #ffffff;
      border: 1px solid var(--border-accent);
      padding: 6px 16px;
      border-radius: 9999px;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--primary-dark);
      margin-bottom: 24px;
      box-shadow: var(--shadow-sm);
    }

    .hero-badge-dot {
      width: 8px;
      height: 8px;
      background-color: var(--primary-light);
      border-radius: 50%;
      box-shadow: 0 0 0 2px var(--primary-tint);
    }

    .hero-title {
      font-size: clamp(2rem, 4vw, 3rem);
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -0.02em;
    }

    .hero-subtitle {
      font-size: clamp(1rem, 2vw, 1.2rem);
      color: var(--text-muted);
      max-width: 760px;
      margin: 0 auto 36px;
      line-height: 1.6;
    }

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

    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 20px;
      text-align: left;
    }

    .stat-card {
      background-color: #ffffff;
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 24px 20px;
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }

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

    .stat-value {
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--primary-dark);
      margin-bottom: 4px;
    }

    .stat-label {
      font-size: 0.9rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* Section Structure */
    .section {
      padding: 70px 0;
      position: relative;
    }

    .section-header {
      text-align: center;
      max-width: 720px;
      margin: 0 auto 48px;
    }

    .section-tag {
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--primary);
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 8px;
      display: block;
    }

    .section-title {
      font-size: 2rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
      letter-spacing: -0.01em;
    }

    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
    }

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

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

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

    .feature-card {
      background-color: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: all 0.25s ease;
    }

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

    .feature-icon-badge {
      width: 44px;
      height: 44px;
      border-radius: var(--radius-md);
      background-color: var(--primary-tint);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.1rem;
      margin-bottom: 18px;
    }

    .feature-card h3 {
      font-size: 1.2rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .feature-card p {
      font-size: 0.925rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Model Tags Cloud */
    .model-pills {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 24px;
      justify-content: center;
    }

    .model-pill {
      background-color: #ffffff;
      border: 1px solid var(--border);
      padding: 6px 14px;
      border-radius: 9999px;
      font-size: 0.85rem;
      font-weight: 500;
      color: var(--text-muted);
      transition: all 0.2s ease;
    }

    .model-pill:hover {
      border-color: var(--primary-light);
      color: var(--primary-dark);
      background-color: var(--primary-tint);
    }

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

    .step-item {
      background-color: #ffffff;
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 24px;
      position: relative;
    }

    .step-num {
      display: inline-block;
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--primary);
      background-color: var(--primary-tint);
      padding: 2px 10px;
      border-radius: 9999px;
      margin-bottom: 12px;
    }

    .step-item h4 {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .step-item p {
      font-size: 0.875rem;
      color: var(--text-muted);
    }

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

    .eval-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.925rem;
    }

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

    .eval-table th {
      background-color: var(--surface-subtle);
      font-weight: 700;
      color: var(--text-main);
    }

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

    .eval-highlight {
      background-color: var(--primary-tint);
      font-weight: 600;
      color: var(--primary-dark);
    }

    .rating-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background-color: #fef3c7;
      color: #92400e;
      padding: 4px 10px;
      border-radius: var(--radius-sm);
      font-weight: 700;
      font-size: 0.85rem;
    }

    /* Showcase & Media Grid */
    .media-card {
      background-color: #ffffff;
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }

    .media-card-img-wrap {
      width: 100%;
      overflow: hidden;
      background-color: var(--surface-subtle);
      aspect-ratio: 16 / 9;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .media-card-img-wrap.square {
      aspect-ratio: 1 / 1;
    }

    .media-card-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: transform 0.3s ease;
    }

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

    .media-card-body {
      padding: 20px;
      flex: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .media-card-body h4 {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 6px;
    }

    .media-card-body p {
      font-size: 0.875rem;
      color: var(--text-muted);
    }

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

    .user-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }

    .user-avatar-char {
      width: 40px;
      height: 40px;
      background-color: var(--primary-tint);
      color: var(--primary-dark);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1rem;
    }

    .user-info h4 {
      font-size: 0.95rem;
      font-weight: 700;
    }

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

    .testimonial-text {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* FAQ Accordion */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

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

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

    .faq-question {
      padding: 18px 20px;
      width: 100%;
      text-align: left;
      background: none;
      border: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-size: 1rem;
      font-weight: 600;
      color: var(--text-main);
    }

    .faq-icon {
      font-size: 1.25rem;
      color: var(--primary);
      transition: transform 0.2s ease;
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.25s ease-out;
      background-color: var(--surface-subtle);
    }

    .faq-answer-inner {
      padding: 16px 20px;
      font-size: 0.925rem;
      color: var(--text-muted);
      line-height: 1.6;
      border-top: 1px solid var(--border);
    }

    /* Articles & Resources */
    .article-list-wrap {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .article-item {
      background-color: #ffffff;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 20px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .article-item h4 {
      font-size: 1rem;
      font-weight: 600;
      margin-bottom: 8px;
    }

    .article-item h4 a:hover {
      color: var(--primary);
    }

    .article-meta {
      font-size: 0.8rem;
      color: var(--text-light);
      margin-top: 12px;
    }

    /* Form Section */
    .form-wrapper {
      background-color: #ffffff;
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-sm);
      max-width: 800px;
      margin: 0 auto;
    }

    .form-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
      margin-bottom: 20px;
    }

    .form-group.full {
      grid-column: span 2;
    }

    .form-group label {
      display: block;
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    .form-control {
      width: 100%;
      padding: 10px 14px;
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      font-size: 0.925rem;
      color: var(--text-main);
      background-color: #ffffff;
      outline: none;
      transition: border-color 0.2s ease;
    }

    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
    }

    textarea.form-control {
      min-height: 100px;
      resize: vertical;
    }

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

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 32px;
      margin-bottom: 40px;
    }

    .footer-col h4 {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 16px;
    }

    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-links a {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

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

    .qr-card {
      display: flex;
      align-items: center;
      gap: 12px;
      background-color: var(--surface-subtle);
      padding: 12px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border);
    }

    .qr-card img {
      width: 80px;
      height: 80px;
      object-fit: cover;
      border-radius: var(--radius-sm);
    }

    .qr-info {
      font-size: 0.825rem;
      line-height: 1.4;
    }

    .friend-links-area {
      padding-top: 20px;
      border-top: 1px solid var(--border);
      margin-bottom: 24px;
    }

    .friend-links-title {
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .friend-links-list {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.85rem;
    }

    .friend-links-list a {
      color: var(--text-muted);
    }

    .friend-links-list a:hover {
      color: var(--primary);
    }

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

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

    .float-btn {
      width: 46px;
      height: 46px;
      border-radius: 50%;
      background-color: #ffffff;
      border: 1px solid var(--border);
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      color: var(--primary);
      font-size: 1.1rem;
      transition: all 0.2s ease;
    }

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

    /* Responsive */
    @media (max-width: 992px) {
      .stats-grid,
      .grid-4,
      .steps-wrapper {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3,
      .article-list-wrap {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .mobile-toggle {
        display: block;
      }
      .nav-menu {
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background-color: #ffffff;
        border-bottom: 1px solid var(--border);
        flex-direction: column;
        padding: 20px;
        display: none;
        box-shadow: var(--shadow-md);
      }
      .nav-menu.active {
        display: flex;
      }
      .nav-links {
        flex-direction: column;
        width: 100%;
        margin-bottom: 16px;
      }
      .nav-links li {
        width: 100%;
        text-align: center;
      }
      .stats-grid,
      .grid-3,
      .grid-2,
      .grid-4,
      .steps-wrapper,
      .article-list-wrap,
      .footer-grid,
      .form-grid {
        grid-template-columns: 1fr;
      }
      .form-group.full {
        grid-column: span 1;
      }
      .form-wrapper {
        padding: 24px 16px;
      }
    }