/* CSS Reset & Variables - Vibrant Color Contrast Corporate Style (浅色基底 + 艳色撞色) */
    :root {
      --primary-color: #4f46e5;
      --primary-dark: #3730a3;
      --accent-cyan: #06b6d4;
      --accent-rose: #f43f5e;
      --accent-amber: #f59e0b;
      --bg-main: #f8fafc;
      --bg-card: #ffffff;
      --bg-alt: #eff6ff;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-light: #64748b;
      --border-color: #e2e8f0;
      --shadow-sm: 0 1px 3px rgba(15,23,42,0.08);
      --shadow-md: 0 10px 25px -5px rgba(79,70,229,0.12), 0 8px 10px -6px rgba(6,182,212,0.08);
      --shadow-lg: 0 20px 35px -10px rgba(15,23,42,0.15);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 24px;
      --container-width: 1200px;
    }

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

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

    body {
      overflow-x: hidden;
      background-color: var(--bg-main);
    }

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

    a:hover {
      color: var(--primary-dark);
    }

    ul, ol {
      list-style: none;
    }

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

    /* Outer Wrapper / Container Standard */
    .container {
      max-width: var(--container-width);
      margin: 0 auto;
      padding: 0 24px;
    }

    /* Section Styles */
    section {
      padding: 80px 0;
      position: relative;
    }

    .section-title-wrap {
      text-align: center;
      margin-bottom: 50px;
    }

    .section-tag {
      display: inline-block;
      padding: 6px 16px;
      background: linear-gradient(90deg, rgba(79,70,229,0.1) 0%, rgba(6,182,212,0.1) 100%);
      color: var(--primary-color);
      font-weight: 700;
      font-size: 0.875rem;
      border-radius: 50px;
      margin-bottom: 12px;
      border: 1px solid rgba(79,70,229,0.2);
      letter-spacing: 1px;
    }

    .section-title {
      font-size: 2.25rem;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.5px;
      margin-bottom: 16px;
    }

    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      max-width: 760px;
      margin: 0 auto;
    }

    /* Buttons */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 14px 32px;
      font-size: 1rem;
      font-weight: 700;
      border-radius: var(--radius-md);
      cursor: pointer;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      border: none;
      text-align: center;
      gap: 8px;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary-color) 0%, #6366f1 50%, var(--accent-cyan) 100%);
      color: #ffffff !important;
      box-shadow: 0 8px 20px rgba(79,70,229,0.3);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 28px rgba(79,70,229,0.45);
    }

    .btn-accent {
      background: linear-gradient(135deg, var(--accent-rose) 0%, #f43f5e 100%);
      color: #ffffff !important;
      box-shadow: 0 8px 20px rgba(244,63,94,0.3);
    }

    .btn-accent:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 28px rgba(244,63,94,0.45);
    }

    .btn-outline {
      background: #ffffff;
      color: var(--text-main) !important;
      border: 2px solid var(--border-color);
    }

    .btn-outline:hover {
      border-color: var(--primary-color);
      color: var(--primary-color) !important;
      transform: translateY(-2px);
    }

    /* Global Header & Nav */
    header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(226, 232, 240, 0.8);
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
    }

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

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

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0; /* Strictly set as required */
    }

    .nav-links a {
      padding: 8px 14px;
      font-size: 0.92rem;
      font-weight: 600;
      color: var(--text-main);
      white-space: nowrap;
      border-radius: var(--radius-sm);
    }

    .nav-links a:hover {
      color: var(--primary-color);
      background-color: rgba(79,70,229,0.06);
    }

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

    .nav-cta-btn {
      padding: 10px 20px;
      font-size: 0.9rem;
      font-weight: 700;
      border-radius: var(--radius-sm);
      background: linear-gradient(135deg, var(--primary-color), var(--accent-cyan));
      color: #ffffff !important;
    }

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

    /* Section 1: Hero Area (NO IMAGES HERE) */
    .hero-section {
      padding: 90px 0 70px;
      background: radial-gradient(circle at 10% 20%, rgba(79,70,229,0.08) 0%, rgba(6,182,212,0.05) 50%, rgba(248,250,252,1) 100%);
      border-bottom: 1px solid var(--border-color);
    }

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

    .hero-badge-wrap {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 8px 20px;
      background: #ffffff;
      border: 1px solid rgba(79,70,229,0.2);
      border-radius: 50px;
      box-shadow: var(--shadow-sm);
      margin-bottom: 24px;
    }

    .hero-badge-dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: var(--accent-rose);
      box-shadow: 0 0 10px var(--accent-rose);
      animation: pulse 2s infinite;
    }

    @keyframes pulse {
      0% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.5; transform: scale(1.2); }
      100% { opacity: 1; transform: scale(1); }
    }

    .hero-badge-text {
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .hero-title {
      font-size: 2.8rem;
      font-weight: 900;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -1px;
    }

    .hero-title span {
      background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-cyan) 50%, var(--accent-rose) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-sub {
      font-size: 1.25rem;
      color: var(--text-muted);
      margin-bottom: 36px;
      line-height: 1.6;
    }

    .hero-cta-group {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      margin-bottom: 50px;
      flex-wrap: wrap;
    }

    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 40px;
    }

    .metric-card {
      background: var(--bg-card);
      padding: 24px 16px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      text-align: center;
      transition: transform 0.3s ease;
    }

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

    .metric-num {
      font-size: 2rem;
      font-weight: 900;
      color: var(--primary-color);
      margin-bottom: 4px;
    }

    .metric-label {
      font-size: 0.88rem;
      color: var(--text-muted);
      font-weight: 600;
    }

    /* Grid Layouts for Sections */
    .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: 32px;
    }

    /* Cards */
    .card-box {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      padding: 30px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      position: relative;
      overflow: hidden;
    }

    .card-box:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
      border-color: rgba(79,70,229,0.3);
    }

    .card-icon-badge {
      width: 52px;
      height: 52px;
      border-radius: 12px;
      background: linear-gradient(135deg, rgba(79,70,229,0.1), rgba(6,182,212,0.1));
      color: var(--primary-color);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      font-weight: 800;
      margin-bottom: 20px;
      border: 1px solid rgba(79,70,229,0.2);
    }

    .card-title {
      font-size: 1.2rem;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }

    .card-desc {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Specific Section 2: About Us & Platform Intro */
    .about-feature-list {
      margin-top: 24px;
    }

    .about-feature-item {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      margin-bottom: 14px;
      font-size: 0.98rem;
      color: var(--text-main);
    }

    .about-feature-item i {
      color: var(--accent-rose);
      font-weight: bold;
    }

    /* Specific Section 3: AIGC Models Pill Grid */
    .model-tags-wrapper {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      justify-content: center;
      margin-top: 30px;
    }

    .model-pill {
      background: var(--bg-card);
      padding: 10px 20px;
      border-radius: 50px;
      border: 1px solid var(--border-color);
      font-weight: 700;
      font-size: 0.95rem;
      color: var(--text-main);
      box-shadow: var(--shadow-sm);
      display: flex;
      align-items: center;
      gap: 8px;
      transition: all 0.25s ease;
    }

    .model-pill:hover {
      background: var(--primary-color);
      color: #ffffff;
      border-color: var(--primary-color);
      transform: translateY(-2px);
    }

    .model-pill span.badge-sm {
      font-size: 0.72rem;
      padding: 2px 8px;
      border-radius: 10px;
      background: rgba(244,63,94,0.15);
      color: var(--accent-rose);
    }

    .model-pill:hover span.badge-sm {
      background: #ffffff;
      color: var(--primary-color);
    }

    /* Specific Section 4: One-stop Creation Scenarios Grid */
    .scenario-card {
      border-top: 4px solid var(--primary-color);
    }

    .scenario-card:nth-child(2n) {
      border-top-color: var(--accent-cyan);
    }

    .scenario-card:nth-child(3n) {
      border-top-color: var(--accent-rose);
    }

    /* Section 7: Process Timeline */
    .process-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .step-card {
      background: var(--bg-card);
      padding: 30px 20px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      text-align: center;
      position: relative;
    }

    .step-num {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary-color), var(--accent-cyan));
      color: #ffffff;
      font-weight: 800;
      font-size: 1.2rem;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 16px;
      box-shadow: 0 4px 12px rgba(79,70,229,0.3);
    }

    /* Section 9: Comparison Section (严格按要求设置) */
    .comparison-wrapper {
      background: var(--bg-card);
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      padding: 36px;
      overflow-x: auto;
    }

    .rating-banner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: linear-gradient(90deg, #1e1b4b 0%, #312e81 100%);
      color: #ffffff;
      padding: 20px 30px;
      border-radius: var(--radius-md);
      margin-bottom: 30px;
      flex-wrap: wrap;
      gap: 16px;
    }

    .rating-score {
      font-size: 2.2rem;
      font-weight: 900;
      color: var(--accent-amber);
    }

    .rating-stars {
      color: var(--accent-amber);
      font-size: 1.3rem;
      letter-spacing: 2px;
    }

    .table-custom {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 700px;
    }

    .table-custom th, .table-custom td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.95rem;
    }

    .table-custom th {
      background-color: var(--bg-main);
      font-weight: 800;
      color: var(--text-main);
    }

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

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

    .tag-cross {
      color: #ef4444;
    }

    /* Section 11: Token Price Table */
    .token-table-card {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    /* Section 13: FAQ Accordion */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: all 0.25s ease;
    }

    .faq-header {
      padding: 20px 24px;
      font-weight: 700;
      font-size: 1.05rem;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      user-select: none;
    }

    .faq-header:hover {
      color: var(--primary-color);
      background-color: rgba(79,70,229,0.02);
    }

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

    .faq-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      padding: 0 24px;
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.7;
    }

    .faq-item.active .faq-content {
      max-height: 250px;
      padding: 0 24px 20px 24px;
    }

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

    /* User Reviews Section */
    .review-card {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      padding: 26px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-user {
      display: flex;
      align-items: center;
      gap: 14px;
      margin-bottom: 16px;
    }

    .avatar-placeholder {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary-color), var(--accent-rose));
      color: #ffffff;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.1rem;
    }

    .review-name {
      font-weight: 700;
      color: var(--text-main);
      font-size: 1rem;
    }

    .review-role {
      font-size: 0.82rem;
      color: var(--text-light);
    }

    .review-text {
      font-size: 0.94rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Media Assets Section */
    .media-showcase-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      margin-top: 30px;
    }

    .media-showcase-item {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .ai-page-image {
      width: 100%;
      height: auto;
      object-fit: cover;
    }

    /* Article List */
    .article-links-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
    }

    .article-link-card {
      background: var(--bg-card);
      padding: 16px 20px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
      font-weight: 600;
      color: var(--text-main);
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .article-link-card:hover {
      border-color: var(--primary-color);
      color: var(--primary-color);
      transform: translateX(4px);
    }

    /* Form Section */
    .form-wrapper {
      background: var(--bg-card);
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      padding: 40px;
    }

    .form-group {
      margin-bottom: 20px;
    }

    .form-label {
      display: block;
      margin-bottom: 8px;
      font-weight: 700;
      color: var(--text-main);
      font-size: 0.95rem;
    }

    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      color: var(--text-main);
      background-color: var(--bg-main);
      outline: none;
      transition: border-color 0.25s ease;
    }

    .form-input:focus, .form-select:focus, .form-textarea:focus {
      border-color: var(--primary-color);
      background-color: #ffffff;
      box-shadow: 0 0 0 3px rgba(79,70,229,0.1);
    }

    .contact-qr-wrap {
      text-align: center;
      background: var(--bg-main);
      padding: 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
    }

    .contact-qr-wrap img {
      max-width: 160px;
      margin: 0 auto 12px;
      border-radius: 8px;
      border: 1px solid var(--border-color);
    }

    /* Footer */
    footer {
      background-color: #0f172a;
      color: #94a3b8;
      padding: 60px 0 30px;
      border-top: 1px solid #1e293b;
    }

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

    .footer-col h4 {
      color: #ffffff;
      font-size: 1.1rem;
      margin-bottom: 20px;
      font-weight: 700;
    }

    .footer-col p {
      font-size: 0.9rem;
      line-height: 1.7;
    }

    .footer-links li {
      margin-bottom: 10px;
    }

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

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

    .friendship-links {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      margin-top: 30px;
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.88rem;
    }

    .friendship-links a {
      color: #64748b;
    }

    .friendship-links a:hover {
      color: var(--accent-cyan);
    }

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      text-align: center;
      font-size: 0.88rem;
      color: #64748b;
    }

    /* Floating Contact Widget */
    .float-contact {
      position: fixed;
      right: 24px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .float-btn {
      width: 52px;
      height: 52px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary-color), var(--accent-rose));
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 10px 20px rgba(0,0,0,0.2);
      cursor: pointer;
      font-size: 1.2rem;
      transition: transform 0.25s ease;
      text-decoration: none;
    }

    .float-btn:hover {
      transform: scale(1.1);
      color: #ffffff;
    }

    /* Responsive Breakdown */
    @media (max-width: 1024px) {
      .grid-4, .process-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 76px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow-md);
        border-bottom: 1px solid var(--border-color);
      }

      .nav-links.active {
        display: flex;
      }

      .nav-toggle {
        display: block;
      }

      .hero-title {
        font-size: 2rem;
      }

      .hero-metrics {
        grid-template-columns: repeat(2, 1fr);
      }

      .grid-3, .grid-2, .grid-4, .process-steps, .media-showcase-grid, .article-links-grid {
        grid-template-columns: 1fr;
      }

      .footer-grid {
        grid-template-columns: 1fr;
      }

      .rating-banner {
        flex-direction: column;
        text-align: center;
      }
    }