:root {
      --primary: #0F172A;
      --accent-pop: #FF4D00;
      --accent-cyan: #00E5FF;
      --accent-yellow: #FFD000;
      --accent-violet: #7928CA;
      --bg-page: #F8FAFC;
      --bg-card: #FFFFFF;
      --text-main: #0F172A;
      --text-muted: #475569;
      --text-light: #64748B;
      --border-color: #E2E8F0;
      --border-dark: #0F172A;
      --shadow-pop: 5px 5px 0px #0F172A;
      --shadow-pop-sm: 3px 3px 0px #0F172A;
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    }
    * {
      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-main);
      line-height: 1.65;
      overflow-x: hidden;
      background-image: radial-gradient(#E2E8F0 1px, transparent 1px);
      background-size: 24px 24px;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container {
      width: 100%;
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 28px;
      font-weight: 700;
      font-size: 1rem;
      border-radius: var(--radius-sm);
      border: 2px solid var(--border-dark);
      cursor: pointer;
      box-shadow: var(--shadow-pop-sm);
      transition: var(--transition);
      text-align: center;
    }
    .btn:hover {
      transform: translate(-2px, -2px);
      box-shadow: var(--shadow-pop);
    }
    .btn:active {
      transform: translate(2px, 2px);
      box-shadow: 1px 1px 0px #0F172A;
    }
    .btn-orange {
      background-color: var(--accent-pop);
      color: #FFFFFF;
    }
    .btn-yellow {
      background-color: var(--accent-yellow);
      color: var(--text-main);
    }
    .btn-cyan {
      background-color: var(--accent-cyan);
      color: var(--text-main);
    }
    .btn-white {
      background-color: #FFFFFF;
      color: var(--text-main);
    }
    .badge {
      display: inline-block;
      padding: 4px 12px;
      font-size: 0.8rem;
      font-weight: 800;
      letter-spacing: 0.5px;
      text-transform: uppercase;
      border: 2px solid var(--border-dark);
      border-radius: 50px;
      margin-bottom: 12px;
      box-shadow: 2px 2px 0px var(--border-dark);
    }
    .badge-yellow { background-color: var(--accent-yellow); }
    .badge-cyan { background-color: var(--accent-cyan); }
    .badge-orange { background-color: var(--accent-pop); color: #fff; }
    .badge-violet { background-color: var(--accent-violet); color: #fff; }
    
    .section-header {
      text-align: center;
      margin-bottom: 50px;
      position: relative;
    }
    .section-header h2 {
      font-size: clamp(1.8rem, 3.5vw, 2.5rem);
      font-weight: 900;
      color: var(--text-main);
      margin-bottom: 12px;
      letter-spacing: -0.5px;
    }
    .section-header p {
      font-size: 1.05rem;
      color: var(--text-muted);
      max-width: 700px;
      margin: 0 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: 2px solid var(--border-dark);
    }
    .navbar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .logo-container {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .logo-container .ai-page-logo {
      height: 42px;
      width: auto;
      object-fit: contain;
    }
    .logo-brand {
      font-size: 1.35rem;
      font-weight: 900;
      color: var(--text-main);
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }
    .nav-links li a {
      font-weight: 700;
      font-size: 0.92rem;
      color: var(--text-main);
      padding: 8px 14px;
      border-radius: 6px;
      margin: 0 2px;
    }
    .nav-links li a:hover,
    .nav-links li a.active {
      background-color: var(--accent-yellow);
      border: 1.5px solid var(--border-dark);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .mobile-menu-btn {
      display: none;
      background: none;
      border: 2px solid var(--border-dark);
      border-radius: 6px;
      padding: 6px 10px;
      cursor: pointer;
      font-weight: bold;
    }

    /* Hero Section (No Images Allowed) */
    .hero-section {
      padding: 60px 0 80px;
      position: relative;
      overflow: hidden;
      border-bottom: 2px solid var(--border-dark);
      background: linear-gradient(135deg, #FFFDF0 0%, #F0FDF4 50%, #EFF6FF 100%);
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 40px;
      align-items: center;
    }
    .hero-content h1 {
      font-size: clamp(2.1rem, 4vw, 3rem);
      line-height: 1.2;
      font-weight: 900;
      color: var(--text-main);
      margin-bottom: 20px;
    }
    .hero-content .highlight {
      background: linear-gradient(120deg, var(--accent-yellow) 0%, var(--accent-yellow) 100%);
      padding: 2px 8px;
      border: 2px solid var(--border-dark);
      box-shadow: 3px 3px 0px var(--border-dark);
      display: inline-block;
      margin-top: 6px;
    }
    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-muted);
      margin-bottom: 30px;
      line-height: 1.7;
    }
    .hero-btn-group {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 35px;
    }
    .hero-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      align-items: center;
    }
    .hero-tags span {
      font-size: 0.85rem;
      font-weight: 700;
      padding: 4px 10px;
      border-radius: 4px;
      border: 1px solid var(--border-dark);
      background-color: #FFFFFF;
    }
    /* Hero Right Visual: Pure CSS & Geometry Card */
    .hero-visual-card {
      background-color: #FFFFFF;
      border: 3px solid var(--border-dark);
      border-radius: var(--radius-lg);
      padding: 30px;
      box-shadow: 8px 8px 0px var(--border-dark);
      position: relative;
    }
    .visual-pill-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 20px;
      padding-bottom: 15px;
      border-bottom: 2px dashed var(--border-color);
    }
    .status-dot {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-weight: 800;
      font-size: 0.85rem;
    }
    .status-dot::before {
      content: "";
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background-color: #10B981;
      box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
    }
    .model-matrix-board {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 10px;
      margin-bottom: 20px;
    }
    .model-box {
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-sm);
      padding: 10px;
      text-align: center;
      font-weight: 800;
      font-size: 0.82rem;
      transition: var(--transition);
      background-color: var(--bg-page);
    }
    .model-box:hover {
      background-color: var(--accent-cyan);
      transform: translateY(-2px);
    }
    .stats-card-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 15px;
    }
    .stat-mini {
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-sm);
      padding: 14px;
      background-color: #FFFDF0;
    }
    .stat-mini .num {
      font-size: 1.6rem;
      font-weight: 900;
      color: var(--accent-pop);
      display: block;
      line-height: 1.1;
    }
    .stat-mini .label {
      font-size: 0.8rem;
      font-weight: 700;
      color: var(--text-muted);
    }

    /* Common Section Setup */
    .content-section {
      padding: 70px 0;
      border-bottom: 2px solid var(--border-dark);
    }
    .bg-alt {
      background-color: #FFFFFF;
    }
    .bg-warm {
      background-color: #FFFDF5;
    }
    .bg-cool {
      background-color: #F0F9FF;
    }

    /* Data Metrics Bar */
    .metrics-bar {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 20px;
    }
    .metric-card {
      background-color: #FFFFFF;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-pop-sm);
      position: relative;
    }
    .metric-card h3 {
      font-size: 2rem;
      font-weight: 900;
      margin-bottom: 5px;
      color: var(--text-main);
    }
    .metric-card p {
      font-weight: 600;
      color: var(--text-muted);
      font-size: 0.95rem;
    }

    /* Grid Cards: Services, Solutions, Tools */
    .cards-grid-3 {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 25px;
    }
    .feature-card {
      background-color: #FFFFFF;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-pop-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .feature-card:hover {
      transform: translate(-3px, -3px);
      box-shadow: var(--shadow-pop);
    }
    .feature-card-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 15px;
    }
    .feature-card h3 {
      font-size: 1.28rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 10px;
    }
    .feature-card p {
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.6;
      margin-bottom: 18px;
    }
    .tag-list {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
    }
    .tag-item {
      font-size: 0.75rem;
      font-weight: 700;
      background-color: var(--bg-page);
      padding: 3px 8px;
      border: 1px solid var(--border-dark);
      border-radius: 4px;
    }

    /* Step Process */
    .process-timeline {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
      gap: 20px;
      position: relative;
    }
    .process-step {
      background-color: #FFFFFF;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-pop-sm);
      position: relative;
    }
    .step-number {
      width: 44px;
      height: 44px;
      background-color: var(--accent-yellow);
      border: 2px solid var(--border-dark);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.25rem;
      font-weight: 900;
      margin-bottom: 16px;
      box-shadow: 2px 2px 0px var(--border-dark);
    }

    /* Rating & Review Block (Five Stars & 9.9 / 10) */
    .evaluation-box {
      background-color: #FFFFFF;
      border: 3px solid var(--border-dark);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: 8px 8px 0px var(--border-dark);
      margin-bottom: 40px;
    }
    .score-banner {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
      padding-bottom: 25px;
      border-bottom: 2px dashed var(--border-color);
      margin-bottom: 25px;
    }
    .stars-box {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .star-icons {
      color: #F59E0B;
      font-size: 1.6rem;
      letter-spacing: 3px;
    }
    .score-grade {
      font-size: 2.2rem;
      font-weight: 900;
      color: var(--accent-pop);
    }
    .score-grade small {
      font-size: 1.1rem;
      color: var(--text-muted);
    }
    .table-container {
      width: 100%;
      overflow-x: auto;
    }
    .custom-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.95rem;
    }
    .custom-table th, .custom-table td {
      padding: 14px 18px;
      border: 1px solid var(--border-color);
    }
    .custom-table th {
      background-color: #F1F5F9;
      font-weight: 800;
      color: var(--text-main);
    }
    .custom-table tr:nth-child(even) {
      background-color: #F8FAFC;
    }
    .custom-table .highlight-col {
      background-color: #FFFDF0;
      font-weight: 700;
    }

    /* Showcase Images with Real Resources */
    .media-showcase-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 24px;
    }
    .media-card {
      background-color: #FFFFFF;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-pop-sm);
    }
    .media-card-img {
      width: 100%;
      overflow: hidden;
      background-color: #F1F5F9;
      border-bottom: 2px solid var(--border-dark);
    }
    .media-card-img img {
      width: 100%;
      height: 220px;
      object-fit: cover;
      transition: var(--transition);
    }
    .media-card:hover .media-card-img img {
      transform: scale(1.03);
    }
    .media-card-info {
      padding: 20px;
    }

    /* Testimonials (6 Real Personas) */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 24px;
    }
    .testimonial-card {
      background-color: #FFFFFF;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-pop-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .testimonial-quote {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 20px;
      position: relative;
    }
    .testimonial-user {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .user-avatar-badge {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background-color: var(--accent-cyan);
      border: 2px solid var(--border-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      font-size: 1.1rem;
    }
    .user-meta h4 {
      font-size: 1rem;
      font-weight: 800;
    }
    .user-meta span {
      font-size: 0.8rem;
      color: var(--text-light);
    }

    /* FAQ Accordion */
    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 14px;
      max-width: 900px;
      margin: 0 auto;
    }
    .faq-item {
      background-color: #FFFFFF;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-sm);
      box-shadow: var(--shadow-pop-sm);
      overflow: hidden;
    }
    .faq-question {
      padding: 18px 22px;
      font-weight: 800;
      font-size: 1.05rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      user-select: none;
      background-color: #FFFFFF;
    }
    .faq-toggle-icon {
      font-size: 1.2rem;
      font-weight: 900;
      transition: transform 0.25s ease;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
      padding: 0 22px;
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.6;
      background-color: #FAFAFA;
      border-top: 1px solid transparent;
    }
    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 16px 22px 20px;
      border-top: 1px solid var(--border-color);
    }
    .faq-item.active .faq-toggle-icon {
      transform: rotate(45deg);
    }

    /* Form & Contact Section */
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: start;
    }
    .contact-form-box {
      background-color: #FFFFFF;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: 6px 6px 0px var(--border-dark);
    }
    .form-group {
      margin-bottom: 18px;
    }
    .form-group label {
      display: block;
      font-weight: 700;
      font-size: 0.9rem;
      margin-bottom: 6px;
    }
    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      font-family: inherit;
      background-color: #F8FAFC;
    }
    .form-control:focus {
      outline: none;
      border-color: var(--accent-pop);
      background-color: #FFFFFF;
    }
    .contact-info-box {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .info-card {
      background-color: #FFFFFF;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-pop-sm);
    }
    .qr-flex {
      display: flex;
      align-items: center;
      gap: 20px;
    }
    .qr-container {
      width: 110px;
      height: 110px;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-sm);
      padding: 4px;
      background: #FFFFFF;
      flex-shrink: 0;
    }
    .qr-container img {
      width: 100%;
      height: 100%;
      object-fit: contain;
    }

    /* Articles & Friendly Links */
    .articles-links-box {
      background-color: #FFFFFF;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-pop-sm);
      margin-top: 30px;
    }
    .article-tags-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 15px;
    }
    .article-link-chip {
      display: inline-flex;
      align-items: center;
      padding: 8px 14px;
      background-color: #FFFDF0;
      border: 1.5px solid var(--border-dark);
      border-radius: 6px;
      font-size: 0.88rem;
      font-weight: 700;
    }
    .article-link-chip:hover {
      background-color: var(--accent-yellow);
      transform: translateY(-2px);
    }
    .friend-links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 15px;
    }
    .friend-links-wrap a {
      display: inline-block;
      padding: 6px 14px;
      background-color: #F1F5F9;
      border: 1px solid var(--border-dark);
      border-radius: 6px;
      font-size: 0.85rem;
      font-weight: 600;
    }
    .friend-links-wrap a:hover {
      background-color: var(--accent-cyan);
    }

    /* Footer */
    .site-footer {
      background-color: var(--primary);
      color: #FFFFFF;
      padding: 60px 0 30px;
      border-top: 3px solid var(--border-dark);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1fr;
      gap: 30px;
      margin-bottom: 40px;
    }
    .footer-brand h4 {
      font-size: 1.4rem;
      font-weight: 900;
      margin-bottom: 12px;
      color: #FFFFFF;
    }
    .footer-brand p {
      color: #94A3B8;
      font-size: 0.9rem;
      line-height: 1.6;
    }
    .footer-col h5 {
      font-size: 1rem;
      font-weight: 800;
      color: var(--accent-yellow);
      margin-bottom: 16px;
    }
    .footer-col ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .footer-col ul li a {
      color: #CBD5E1;
      font-size: 0.88rem;
    }
    .footer-col ul li a:hover {
      color: #FFFFFF;
      text-decoration: underline;
    }
    .footer-bottom {
      border-top: 1px solid #334155;
      padding-top: 25px;
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      gap: 15px;
      font-size: 0.85rem;
      color: #94A3B8;
    }

    /* Floating Customer Service */
    .floating-kefu-dock {
      position: fixed;
      right: 20px;
      bottom: 25px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .float-trigger {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background-color: var(--accent-pop);
      color: #FFFFFF;
      border: 2px solid var(--border-dark);
      box-shadow: 3px 3px 0px var(--border-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.2rem;
      font-weight: 900;
      cursor: pointer;
      transition: var(--transition);
      position: relative;
    }
    .float-trigger:hover {
      transform: scale(1.08);
    }
    .float-panel {
      display: none;
      position: absolute;
      right: 60px;
      bottom: 0;
      background: #FFFFFF;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 16px;
      box-shadow: var(--shadow-pop);
      width: 220px;
      text-align: center;
    }
    .float-panel.show {
      display: block;
    }
    .float-panel img {
      width: 130px;
      height: 130px;
      margin: 0 auto 10px;
      border: 1px solid var(--border-dark);
    }
    .back-to-top {
      background-color: var(--accent-yellow);
      color: var(--text-main);
    }

    /* Responsive Queries */
    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .contact-grid {
        grid-template-columns: 1fr;
      }
    }
    @media (max-width: 768px) {
      .navbar {
        position: relative;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background-color: #FFFFFF;
        border-bottom: 2px solid var(--border-dark);
        flex-direction: column;
        padding: 15px 0;
        box-shadow: 0 10px 15px rgba(0,0,0,0.05);
      }
      .nav-links.open {
        display: flex;
      }
      .nav-links li {
        width: 100%;
        text-align: center;
      }
      .nav-links li a {
        display: block;
        padding: 10px;
        margin: 2px 20px;
      }
      .mobile-menu-btn {
        display: block;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }