:root {
      --primary: #ff5722;
      --primary-hover: #f4511e;
      --primary-light: #fff3e0;
      --primary-gradient: linear-gradient(135deg, #ff7043 0%, #ff5722 50%, #e64a19 100%);
      --accent: #ff9800;
      --dark: #1e293b;
      --text: #334155;
      --text-muted: #64748b;
      --bg: #fafaf9;
      --card-bg: #ffffff;
      --border: #f1f5f9;
      --border-accent: #fed7aa;
      --shadow: 0 10px 25px -5px rgba(255, 87, 34, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
      --shadow-hover: 0 20px 30px -10px rgba(255, 87, 34, 0.18);
      --radius: 14px;
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 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, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg);
      color: var(--text);
      line-height: 1.6;
      overflow-x: hidden;
      background-image: 
        radial-gradient(at 0% 0%, rgba(255, 87, 34, 0.04) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(255, 152, 0, 0.04) 0px, transparent 50%);
      background-attachment: fixed;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }

    .container {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* Header & Nav */
    header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid #fee8d6;
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
    }

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

    .brand {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 1.3rem;
      font-weight: 800;
      color: var(--primary);
    }

    .brand img.ai-page-logo {
      height: 38px;
      width: auto;
      display: block;
    }

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

    .nav-links li a {
      padding: 8px 14px;
      font-weight: 600;
      font-size: 0.95rem;
      color: var(--dark);
      border-radius: 8px;
      display: inline-block;
    }

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

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 10px 24px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: 9999px;
      cursor: pointer;
      border: none;
      transition: var(--transition);
      text-align: center;
    }

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

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

    .btn-outline {
      background: #ffffff;
      color: var(--primary);
      border: 1.5px solid var(--primary);
    }

    .btn-outline:hover {
      background: var(--primary-light);
      transform: translateY(-2px);
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--dark);
      cursor: pointer;
    }

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

    .section-title-wrap {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 50px auto;
    }

    .section-badge {
      display: inline-block;
      padding: 6px 16px;
      background: var(--primary-light);
      color: var(--primary);
      border-radius: 9999px;
      font-size: 0.85rem;
      font-weight: 700;
      letter-spacing: 1px;
      margin-bottom: 12px;
      border: 1px solid var(--border-accent);
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: var(--dark);
      margin-bottom: 14px;
      line-height: 1.3;
    }

    .section-subtitle {
      font-size: 1.05rem;
      color: var(--text-muted);
    }

    /* Hero Section (No Images as required) */
    .hero {
      padding: 90px 0 80px;
      background: linear-gradient(180deg, rgba(255, 243, 224, 0.6) 0%, rgba(250, 250, 249, 1) 100%);
      text-align: center;
      position: relative;
    }

    .hero-badge-glow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #ffffff;
      border: 1px solid var(--border-accent);
      padding: 8px 20px;
      border-radius: 9999px;
      box-shadow: 0 4px 15px rgba(255, 87, 34, 0.12);
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--primary);
      margin-bottom: 24px;
      animation: pulse 2s infinite ease-in-out;
    }

    .hero h1 {
      font-size: 2.8rem;
      font-weight: 900;
      color: var(--dark);
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero h1 span {
      color: var(--primary);
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      font-size: 1.2rem;
      color: var(--text-muted);
      max-width: 820px;
      margin: 0 auto 36px auto;
    }

    .hero-actions {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 50px;
    }

    .hero-stats {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      max-width: 1000px;
      margin: 0 auto;
    }

    .stat-card {
      background: #ffffff;
      border-radius: var(--radius);
      padding: 24px 16px;
      box-shadow: var(--shadow);
      border: 1px solid #ffedd5;
      text-align: center;
      transition: var(--transition);
    }

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

    .stat-num {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
      line-height: 1;
    }

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

    /* Model Tags Matrix */
    .model-tags-box {
      margin-top: 40px;
      padding: 24px;
      background: #ffffff;
      border-radius: var(--radius);
      border: 1px dashed var(--border-accent);
    }
    .model-tags-title {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 14px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }
    .tags-flex {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      justify-content: center;
    }
    .tag-item {
      font-size: 0.82rem;
      padding: 4px 12px;
      background: #fff7ed;
      color: #ea580c;
      border-radius: 6px;
      font-weight: 600;
      border: 1px solid #ffedd5;
    }

    /* Cards Grid */
    .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: 30px;
    }

    .feature-card {
      background: var(--card-bg);
      border-radius: var(--radius);
      padding: 28px;
      box-shadow: var(--shadow);
      border: 1px solid var(--border);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }

    .feature-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
      border-color: var(--border-accent);
    }

    .card-icon {
      width: 52px;
      height: 52px;
      border-radius: 12px;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.6rem;
      margin-bottom: 18px;
      font-weight: bold;
    }

    .feature-card h3 {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 10px;
    }

    .feature-card p {
      font-size: 0.95rem;
      color: var(--text-muted);
      flex-grow: 1;
      margin-bottom: 16px;
    }

    .card-badge {
      display: inline-block;
      align-self: flex-start;
      font-size: 0.78rem;
      padding: 3px 10px;
      background: #fff7ed;
      color: #c2410c;
      border-radius: 4px;
      font-weight: 600;
    }

    /* Platform Media Visuals */
    .media-card-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
      margin-top: 30px;
    }

    .media-card {
      background: #ffffff;
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow);
      border: 1px solid var(--border);
      transition: var(--transition);
    }

    .media-card:hover {
      box-shadow: var(--shadow-hover);
    }

    .media-img-wrap {
      width: 100%;
      aspect-ratio: 16 / 9;
      overflow: hidden;
      background: #f1f5f9;
    }

    .media-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: transform 0.5s ease;
    }

    .media-card:hover .media-img-wrap img {
      transform: scale(1.04);
    }

    .media-card-body {
      padding: 20px;
    }

    .media-card-body h4 {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 8px;
    }

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

    /* Workflow Steps */
    .steps-wrapper {
      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);
      box-shadow: var(--shadow);
      position: relative;
      text-align: center;
    }

    .step-num {
      width: 44px;
      height: 44px;
      background: var(--primary-gradient);
      color: #fff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.2rem;
      font-weight: 800;
      margin: 0 auto 16px auto;
      box-shadow: 0 4px 10px rgba(255, 87, 34, 0.3);
    }

    .step-card h4 {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 8px;
    }

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

    /* Comparison Table / Ratings */
    .eval-highlight {
      background: linear-gradient(135deg, #fff7ed 0%, #ffedd5 100%);
      border-radius: var(--radius);
      padding: 30px;
      border: 2px solid #fed7aa;
      margin-bottom: 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
    }

    .eval-score-box {
      display: flex;
      align-items: baseline;
      gap: 12px;
    }

    .eval-score {
      font-size: 3.2rem;
      font-weight: 900;
      color: var(--primary);
      line-height: 1;
    }

    .eval-score-max {
      font-size: 1.2rem;
      color: var(--text-muted);
      font-weight: 600;
    }

    .eval-stars {
      color: #f59e0b;
      font-size: 1.4rem;
      margin-top: 4px;
    }

    .table-responsive {
      width: 100%;
      overflow-x: auto;
      background: #ffffff;
      border-radius: var(--radius);
      box-shadow: var(--shadow);
      border: 1px solid var(--border);
    }

    .custom-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }

    .custom-table th, 
    .custom-table td {
      padding: 16px 20px;
      border-bottom: 1px solid #f1f5f9;
      font-size: 0.95rem;
    }

    .custom-table th {
      background: #fffaf5;
      color: var(--dark);
      font-weight: 700;
    }

    .custom-table tr:hover {
      background: #fffbf7;
    }

    .highlight-col {
      background: rgba(255, 87, 34, 0.03);
      font-weight: 600;
      color: var(--primary);
    }

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

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

    /* FAQ Accordion */
    .faq-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
    }

    .faq-item {
      background: #ffffff;
      border-radius: 12px;
      border: 1px solid var(--border);
      overflow: hidden;
      box-shadow: 0 2px 6px rgba(0, 0, 0, 0.02);
      transition: var(--transition);
    }

    .faq-item.active {
      border-color: var(--border-accent);
      box-shadow: var(--shadow);
    }

    .faq-question {
      padding: 18px 20px;
      font-weight: 700;
      color: var(--dark);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 12px;
    }

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

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

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out, padding 0.3s ease;
      padding: 0 20px;
      color: var(--text-muted);
      font-size: 0.92rem;
      line-height: 1.6;
    }

    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 0 20px 18px 20px;
    }

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

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

    .review-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1.1rem;
    }

    .review-info h5 {
      font-size: 1rem;
      font-weight: 700;
      color: var(--dark);
    }

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

    .review-content {
      font-size: 0.92rem;
      color: var(--text);
      line-height: 1.55;
      font-style: italic;
    }

    .review-rating {
      color: #f59e0b;
      margin-top: 12px;
      font-size: 0.85rem;
    }

    /* Form & Contact */
    .contact-wrapper {
      background: #ffffff;
      border-radius: 20px;
      box-shadow: var(--shadow);
      border: 1px solid var(--border-accent);
      overflow: hidden;
    }

    .form-box {
      padding: 40px;
    }

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

    .form-group label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--dark);
      margin-bottom: 6px;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1.5px solid #e2e8f0;
      border-radius: 8px;
      font-size: 0.95rem;
      color: var(--dark);
      transition: var(--transition);
      background: #f8fafc;
    }

    .form-control:focus {
      outline: none;
      border-color: var(--primary);
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(255, 87, 34, 0.15);
    }

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

    .contact-info-panel {
      background: linear-gradient(135deg, #ff7043 0%, #e64a19 100%);
      color: #ffffff;
      padding: 40px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .contact-info-panel h3 {
      font-size: 1.6rem;
      font-weight: 800;
      margin-bottom: 16px;
    }

    .contact-info-panel p {
      font-size: 0.95rem;
      opacity: 0.9;
      margin-bottom: 24px;
    }

    .qr-container {
      background: #ffffff;
      padding: 12px;
      border-radius: 12px;
      display: inline-block;
      width: 140px;
      margin-bottom: 20px;
    }

    .qr-container img {
      width: 100%;
      height: auto;
      display: block;
    }

    .contact-item-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
      font-size: 0.92rem;
    }

    /* Articles & Poster Showcase */
    .article-links-box {
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius);
      border: 1px solid var(--border);
      box-shadow: var(--shadow);
    }

    .article-links-list {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      list-style: none;
      margin-top: 12px;
    }

    .article-links-list a {
      padding: 8px 16px;
      background: #f8fafc;
      border: 1px solid #e2e8f0;
      border-radius: 6px;
      font-size: 0.88rem;
      color: var(--text);
      display: inline-block;
    }

    .article-links-list a:hover {
      color: var(--primary);
      border-color: var(--primary);
      background: #fff7ed;
    }

    /* Footer */
    footer {
      background: #0f172a;
      color: #94a3b8;
      padding-top: 60px;
      padding-bottom: 30px;
      border-top: 4px solid var(--primary);
    }

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

    .footer-brand h4 {
      color: #ffffff;
      font-size: 1.3rem;
      font-weight: 800;
      margin-bottom: 12px;
    }

    .footer-brand p {
      font-size: 0.9rem;
      line-height: 1.6;
      margin-bottom: 16px;
    }

    .footer-col h5 {
      color: #ffffff;
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 16px;
    }

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

    .footer-col a {
      font-size: 0.9rem;
      color: #94a3b8;
    }

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

    .friendlinks {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 10px;
    }

    .friendlinks a {
      font-size: 0.85rem;
      color: #cbd5e1;
      padding: 4px 10px;
      background: #1e293b;
      border-radius: 4px;
    }

    .friendlinks a:hover {
      color: #ffffff;
      background: var(--primary);
    }

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.85rem;
    }

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

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--primary);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 12px rgba(255, 87, 34, 0.4);
      cursor: pointer;
      border: none;
      transition: var(--transition);
      font-size: 1.2rem;
    }

    .float-btn:hover {
      transform: scale(1.1);
      background: var(--primary-hover);
    }

    @keyframes pulse {
      0%, 100% { transform: scale(1); }
      50% { transform: scale(1.03); }
    }

    /* Responsive */
    @media (max-width: 992px) {
      .hero h1 { font-size: 2.2rem; }
      .grid-3, .grid-4, .hero-stats { grid-template-columns: repeat(2, 1fr); }
      .steps-wrapper { grid-template-columns: repeat(2, 1fr); }
      .faq-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .grid-2 { grid-template-columns: 1fr; }
      .nav-links { display: none; }
      .menu-toggle { display: block; }
    }

    @media (max-width: 640px) {
      .hero h1 { font-size: 1.8rem; }
      .hero-stats { grid-template-columns: 1fr; }
      .grid-3, .grid-4, .steps-wrapper, .media-card-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
      .form-box, .contact-info-panel { padding: 24px; }
      .eval-highlight { flex-direction: column; text-align: center; }
    }