/* Global Reset & Base Typography */
    :root {
      --primary: #4F46E5;
      --primary-dark: #3730A3;
      --accent: #FF5722;
      --accent-hover: #E64A19;
      --secondary: #06B6D4;
      --bg-main: #F8FAFC;
      --bg-card: #FFFFFF;
      --text-main: #0F172A;
      --text-muted: #475569;
      --border-color: #E2E8F0;
      --container-max: 1200px;
    }

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

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.6;
    }

    body {
      overflow-x: hidden;
    }

    a {
      color: var(--primary);
      text-decoration: none;
      transition: all 0.25s ease;
    }

    a:hover {
      color: var(--accent);
    }

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

    /* Container Standard */
    .container {
      width: 100%;
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 1.25rem;
    }

    /* Vibrant UI Elements */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 0.75rem 1.75rem;
      font-size: 1rem;
      font-weight: 600;
      border-radius: 0.5rem;
      border: 2px solid transparent;
      cursor: pointer;
      transition: all 0.2s ease;
      text-align: center;
    }

    .btn-primary {
      background-color: var(--accent);
      color: #FFFFFF;
      box-shadow: 0 4px 14px rgba(255, 87, 34, 0.35);
    }

    .btn-primary:hover {
      background-color: var(--accent-hover);
      color: #FFFFFF;
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(255, 87, 34, 0.45);
    }

    .btn-secondary {
      background-color: var(--primary);
      color: #FFFFFF;
      box-shadow: 0 4px 14px rgba(79, 70, 229, 0.3);
    }

    .btn-secondary:hover {
      background-color: var(--primary-dark);
      color: #FFFFFF;
      transform: translateY(-2px);
    }

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

    .btn-outline:hover {
      background-color: var(--primary);
      color: #FFFFFF;
    }

    .badge {
      display: inline-block;
      padding: 0.25rem 0.75rem;
      font-size: 0.85rem;
      font-weight: 700;
      border-radius: 2rem;
      background: rgba(79, 70, 229, 0.1);
      color: var(--primary);
      margin-bottom: 0.75rem;
    }

    .badge-accent {
      background: rgba(255, 87, 34, 0.1);
      color: var(--accent);
    }

    /* Section Styling */
    section {
      padding: 4.5rem 0;
      position: relative;
    }

    .section-title {
      text-align: center;
      margin-bottom: 3rem;
    }

    .section-title h2 {
      font-size: 2.25rem;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.02em;
    }

    .section-title p {
      margin-top: 0.75rem;
      font-size: 1.1rem;
      color: var(--text-muted);
      max-width: 700px;
      margin-left: auto;
      margin-right: auto;
    }

    /* Header & Navigation */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background-color: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 75px;
    }

    .brand-wrap {
      display: flex;
      align-items: center;
      gap: 0.75rem;
    }

    .ai-page-logo {
      height: 42px;
      width: auto;
    }

    .brand-name {
      font-size: 1.35rem;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.01em;
    }

    /* Strict Rule: .nav-links gap must be 0 */
    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 0;
    }

    .nav-links li a {
      display: block;
      padding: 0.6rem 0.9rem;
      color: var(--text-main);
      font-weight: 600;
      font-size: 0.95rem;
    }

    .nav-links li a:hover {
      color: var(--accent);
    }

    .header-cta {
      display: flex;
      align-items: center;
      gap: 0.75rem;
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 1.75rem;
      cursor: pointer;
      color: var(--text-main);
    }

    /* Hero Section - STRICT RULE: NO IMAGES inside Hero */
    .hero-section {
      background: linear-gradient(135deg, #EEF2FF 0%, #F0F9FF 50%, #FAF5FF 100%);
      padding: 5.5rem 0 4.5rem;
      text-align: center;
      border-bottom: 1px solid var(--border-color);
    }

    .hero-content {
      max-width: 900px;
      margin: 0 auto;
    }

    .hero-title-h1 {
      font-size: 2.75rem;
      font-weight: 900;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 1.25rem;
    }

    .hero-title-h1 span {
      color: var(--primary);
      background: linear-gradient(120deg, var(--primary), var(--accent));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-subtitle {
      font-size: 1.2rem;
      color: var(--text-muted);
      margin-bottom: 2rem;
      line-height: 1.7;
    }

    .hero-tags {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 0.5rem;
      margin-bottom: 2.25rem;
    }

    .hero-tag-item {
      background: #FFFFFF;
      border: 1px solid #CBD5E1;
      padding: 0.35rem 0.85rem;
      border-radius: 2rem;
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--text-main);
      box-shadow: 0 2px 5px rgba(0,0,0,0.03);
    }

    .hero-btns {
      display: flex;
      justify-content: center;
      gap: 1.25rem;
      flex-wrap: wrap;
      margin-bottom: 3.5rem;
    }

    /* Pure CSS Decorative Tech Stats Cards inside Hero */
    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.25rem;
      margin-top: 2.5rem;
    }

    .hero-stat-card {
      background: #FFFFFF;
      padding: 1.5rem 1rem;
      border-radius: 0.75rem;
      border-left: 4px solid var(--primary);
      box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
      text-align: left;
    }

    .hero-stat-card:nth-child(2) { border-left-color: var(--accent); }
    .hero-stat-card:nth-child(3) { border-left-color: var(--secondary); }
    .hero-stat-card:nth-child(4) { border-left-color: #8B5CF6; }

    .hero-stat-num {
      font-size: 1.8rem;
      font-weight: 900;
      color: var(--text-main);
      line-height: 1;
      margin-bottom: 0.35rem;
    }

    .hero-stat-desc {
      font-size: 0.85rem;
      color: var(--text-muted);
      font-weight: 600;
    }

    /* Card Layout Grids */
    .grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 2rem; }
    .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }
    .grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }

    .card {
      background: var(--bg-card);
      border-radius: 0.75rem;
      padding: 2rem;
      border: 1px solid var(--border-color);
      box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
      transition: all 0.3s ease;
    }

    .card:hover {
      transform: translateY(-4px);
      box-shadow: 0 15px 30px rgba(0, 0, 0, 0.08);
      border-color: var(--primary);
    }

    /* AIGC Services Block Styling */
    .service-card {
      position: relative;
      overflow: hidden;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .service-card-header {
      margin-bottom: 1rem;
    }

    .service-card-icon {
      width: 48px;
      height: 48px;
      border-radius: 0.5rem;
      background: var(--primary);
      color: #FFFFFF;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      font-weight: 900;
      margin-bottom: 1rem;
    }

    .service-card h3 {
      font-size: 1.3rem;
      font-weight: 700;
      margin-bottom: 0.5rem;
    }

    .service-card p {
      font-size: 0.95rem;
      color: var(--text-muted);
    }

    /* Comparison Table Styling */
    .table-container {
      width: 100%;
      overflow-x: auto;
      background: #FFFFFF;
      border-radius: 0.75rem;
      border: 1px solid var(--border-color);
      box-shadow: 0 4px 20px rgba(0,0,0,0.05);
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 650px;
    }

    .compare-table th, .compare-table td {
      padding: 1.25rem;
      border-bottom: 1px solid var(--border-color);
    }

    .compare-table th {
      background: #F1F5F9;
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
    }

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

    .compare-highlight {
      background: rgba(79, 70, 229, 0.04);
      font-weight: 700;
      color: var(--primary);
    }

    .rating-badge-box {
      background: linear-gradient(135deg, #FFF7ED 0%, #FFEDD5 100%);
      border: 2px solid #F97316;
      border-radius: 0.75rem;
      padding: 1.5rem;
      text-align: center;
      margin-bottom: 2rem;
      display: flex;
      align-items: center;
      justify-content: space-around;
      flex-wrap: wrap;
      gap: 1rem;
    }

    .rating-score {
      font-size: 2.5rem;
      font-weight: 900;
      color: #EA580C;
    }

    .rating-stars {
      color: #F59E0B;
      font-size: 1.5rem;
    }

    /* Workflow Timeline */
    .timeline-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
      position: relative;
    }

    .timeline-item {
      background: #FFFFFF;
      padding: 1.75rem;
      border-radius: 0.75rem;
      border: 1px solid var(--border-color);
      position: relative;
    }

    .timeline-step {
      font-size: 2rem;
      font-weight: 900;
      color: var(--secondary);
      margin-bottom: 0.5rem;
    }

    /* FAQ Collapsible Panel */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 1rem;
    }

    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: 0.5rem;
      overflow: hidden;
    }

    .faq-question {
      padding: 1.25rem 1.5rem;
      font-size: 1.05rem;
      font-weight: 700;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #FFFFFF;
      user-select: none;
    }

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

    .faq-answer {
      padding: 0 1.5rem 1.25rem 1.5rem;
      color: var(--text-muted);
      font-size: 0.98rem;
      display: none;
      line-height: 1.7;
    }

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

    .faq-item.active .faq-icon {
      transform: rotate(180deg);
    }

    .faq-icon {
      transition: transform 0.3s ease;
      font-weight: bold;
    }

    /* User Reviews */
    .review-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: 0.75rem;
      padding: 1.75rem;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-user {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      margin-top: 1.25rem;
    }

    .review-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary);
      color: #FFFFFF;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
    }

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

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

    /* Contact Form & Contact Details Grid */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 3rem;
      background: #FFFFFF;
      border-radius: 1rem;
      padding: 2.5rem;
      border: 1px solid var(--border-color);
      box-shadow: 0 10px 30px rgba(0,0,0,0.04);
    }

    .contact-form {
      display: flex;
      flex-direction: column;
      gap: 1.25rem;
    }

    .form-group {
      display: flex;
      flex-direction: column;
      gap: 0.4rem;
    }

    .form-group label {
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 0.75rem 1rem;
      border: 1px solid var(--border-color);
      border-radius: 0.5rem;
      font-size: 0.95rem;
      outline: none;
      transition: border-color 0.2s;
    }

    .form-control:focus {
      border-color: var(--primary);
    }

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

    .qr-box {
      text-align: center;
      background: #F8FAFC;
      padding: 1.5rem;
      border-radius: 0.75rem;
      border: 1px solid var(--border-color);
      margin-top: 1.5rem;
    }

    .qr-box img {
      max-width: 150px;
      margin: 0 auto 0.75rem auto;
      border-radius: 0.5rem;
    }

    /* Media Library Display Blocks */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.5rem;
    }

    .case-card {
      background: #FFFFFF;
      border-radius: 0.75rem;
      overflow: hidden;
      border: 1px solid var(--border-color);
    }

    .case-card img {
      width: 100%;
      height: 200px;
      object-fit: cover;
    }

    .case-body {
      padding: 1.25rem;
    }

    /* Articles Block */
    .article-links-wrap {
      background: #FFFFFF;
      border-radius: 0.75rem;
      padding: 2rem;
      border: 1px solid var(--border-color);
    }

    .article-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 1rem;
    }

    .article-item {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding-bottom: 0.75rem;
      border-bottom: 1px dashed var(--border-color);
    }

    /* Footer Alignment & Safe Styling */
    .site-footer {
      background-color: #0F172A;
      color: #94A3B8;
      padding: 4rem 0 2rem 0;
      border-top: 1px solid #1E293B;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 2.5rem;
      margin-bottom: 3rem;
    }

    .footer-col h4 {
      color: #FFFFFF;
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 1.25rem;
    }

    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 0.6rem;
    }

    .footer-links a {
      color: #94A3B8;
      font-size: 0.9rem;
    }

    .footer-links a:hover {
      color: #FFFFFF;
    }

    .friendship-links {
      display: flex;
      flex-wrap: wrap;
      gap: 0.8rem;
      margin-top: 0.5rem;
    }

    .friendship-links a {
      color: #CBD5E1;
      background: #1E293B;
      padding: 0.3rem 0.7rem;
      border-radius: 0.25rem;
      font-size: 0.85rem;
    }

    .friendship-links a:hover {
      background: var(--primary);
      color: #FFFFFF;
    }

    .footer-bottom {
      text-align: center;
      padding-top: 2rem;
      border-top: 1px solid #1E293B;
      font-size: 0.88rem;
      color: #64748B;
    }

    .floating-kefu {
      position: fixed;
      bottom: 2rem;
      right: 2rem;
      z-index: 999;
      background: var(--accent);
      color: #FFFFFF;
      width: 56px;
      height: 56px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 8px 20px rgba(255,87,34,0.4);
      cursor: pointer;
      font-size: 1.2rem;
      font-weight: bold;
    }

    /* Responsive Adjustments */
    @media (max-width: 992px) {
      .grid-4, .hero-stats-grid, .timeline-grid, .cases-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .contact-wrapper {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .hero-title-h1 {
        font-size: 2rem;
      }
      .grid-2, .grid-3, .grid-4, .hero-stats-grid, .timeline-grid, .cases-grid {
        grid-template-columns: 1fr;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 75px;
        left: 0;
        width: 100%;
        background: #FFFFFF;
        flex-direction: column;
        padding: 1rem 0;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.active {
        display: flex;
      }
      .mobile-menu-btn {
        display: block;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }