:root {
      --primary: #4f46e5;
      --primary-dark: #3730a3;
      --primary-light: #e0e7ff;
      --accent-coral: #ff4365;
      --accent-cyan: #06b6d4;
      --accent-violet: #8b5cf6;
      --accent-amber: #f59e0b;
      --accent-emerald: #10b981;
      --text-main: #0f172a;
      --text-body: #334155;
      --text-muted: #64748b;
      --bg-page: #f8fafc;
      --bg-surface: #ffffff;
      --bg-alt: #f1f5f9;
      --border-color: #e2e8f0;
      --border-hover: #cbd5e1;
      --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
      --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.07), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
      --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.04);
      --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.1), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 18px;
      --radius-full: 9999px;
      --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-body);
      background-color: var(--bg-page);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

    body {
      overflow-x: hidden;
      background: radial-gradient(circle at 10% 20%, rgba(224, 231, 255, 0.45) 0%, transparent 40%),
                  radial-gradient(circle at 90% 60%, rgba(255, 228, 230, 0.45) 0%, transparent 40%),
                  radial-gradient(circle at 50% 90%, rgba(207, 250, 254, 0.45) 0%, transparent 40%),
                  var(--bg-page);
      background-attachment: fixed;
    }

    /* Container */
    .container {
      width: 100%;
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

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

    /* Header */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
    }

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

    .logo-box {
      display: flex;
      align-items: center;
      gap: 12px;
      flex-shrink: 0;
    }

    .ai-page-logo {
      height: 42px;
      width: auto;
      object-fit: contain;
      display: block;
    }

    .logo-text-group {
      display: flex;
      flex-direction: column;
    }

    .logo-title {
      font-size: 20px;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.5px;
      line-height: 1.2;
    }

    .logo-subtitle {
      font-size: 11px;
      color: var(--primary);
      font-weight: 600;
      letter-spacing: 0.5px;
      text-transform: uppercase;
    }

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

    .nav-links li a {
      font-size: 14px;
      font-weight: 500;
      color: var(--text-body);
      padding: 8px 12px;
      border-radius: var(--radius-sm);
      display: inline-block;
    }

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

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

    .btn-header-ghost {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 8px 16px;
      font-size: 13px;
      font-weight: 600;
      color: var(--text-main);
      background-color: var(--bg-alt);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-full);
    }

    .btn-header-ghost:hover {
      background-color: var(--border-color);
    }

    .btn-header-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 9px 20px;
      font-size: 13px;
      font-weight: 600;
      color: #ffffff;
      background: linear-gradient(135deg, var(--primary) 0%, var(--accent-violet) 100%);
      border-radius: var(--radius-full);
      box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
    }

    .btn-header-primary:hover {
      transform: translateY(-1px);
      box-shadow: 0 6px 16px rgba(79, 70, 229, 0.4);
    }

    .mobile-menu-btn {
      display: none;
      background: transparent;
      border: none;
      cursor: pointer;
      padding: 8px;
    }

    .mobile-menu-btn span {
      display: block;
      width: 24px;
      height: 2px;
      background: var(--text-main);
      margin: 5px 0;
      transition: var(--transition);
    }

    /* Hero Section (No Images Allowed) */
    .hero-section {
      padding: 70px 0 60px;
      position: relative;
    }

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

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: #ffffff;
      border: 1px solid rgba(79, 70, 229, 0.2);
      border-radius: var(--radius-full);
      font-size: 13px;
      font-weight: 600;
      color: var(--primary);
      box-shadow: 0 2px 8px rgba(79, 70, 229, 0.08);
      margin-bottom: 24px;
    }

    .hero-badge-pulse {
      width: 8px;
      height: 8px;
      background: var(--accent-coral);
      border-radius: 50%;
      box-shadow: 0 0 0 4px rgba(255, 67, 101, 0.2);
      animation: pulse-dot 2s infinite;
    }

    @keyframes pulse-dot {
      0% { box-shadow: 0 0 0 0 rgba(255, 67, 101, 0.4); }
      70% { box-shadow: 0 0 0 8px rgba(255, 67, 101, 0); }
      100% { box-shadow: 0 0 0 0 rgba(255, 67, 101, 0); }
    }

    .hero-title {
      font-size: 42px;
      font-weight: 900;
      color: var(--text-main);
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -0.8px;
    }

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

    .hero-subtitle {
      font-size: 17px;
      color: var(--text-body);
      max-width: 800px;
      margin: 0 auto 32px;
      line-height: 1.7;
    }

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

    .btn-hero-official {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      padding: 15px 36px;
      font-size: 16px;
      font-weight: 700;
      color: #ffffff;
      background: linear-gradient(135deg, #ff4365 0%, #4f46e5 100%);
      border-radius: var(--radius-full);
      box-shadow: 0 10px 25px rgba(255, 67, 101, 0.35);
      transition: var(--transition);
    }

    .btn-hero-official:hover {
      transform: translateY(-2px);
      box-shadow: 0 14px 30px rgba(255, 67, 101, 0.45);
      color: #ffffff;
    }

    .btn-hero-sub {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 15px 30px;
      font-size: 15px;
      font-weight: 600;
      color: var(--text-main);
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-full);
      box-shadow: var(--shadow-sm);
    }

    .btn-hero-sub:hover {
      background: var(--bg-alt);
      border-color: var(--border-hover);
      transform: translateY(-2px);
    }

    /* Hero Metrics Bar (Pure CSS Cards) */
    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 20px;
    }

    .stat-card {
      background: #ffffff;
      padding: 22px 18px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      text-align: center;
      transition: var(--transition);
    }

    .stat-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
      border-color: rgba(79, 70, 229, 0.3);
    }

    .stat-value {
      font-size: 28px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 4px;
      font-variant-numeric: tabular-nums;
    }

    .stat-value span {
      color: var(--primary);
      font-size: 20px;
    }

    .stat-label {
      font-size: 13px;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* Common Section Styles */
    section {
      padding: 70px 0;
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 48px;
    }

    .section-eyebrow {
      display: inline-block;
      font-size: 12px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: var(--accent-coral);
      background: rgba(255, 67, 101, 0.1);
      padding: 4px 12px;
      border-radius: var(--radius-full);
      margin-bottom: 12px;
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.5px;
      margin-bottom: 12px;
    }

    .section-desc {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Platform Overview */
    .about-card-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-md);
    }

    .about-lead {
      font-size: 18px;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 24px;
      line-height: 1.6;
    }

    .about-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-top: 30px;
    }

    .about-item {
      background: var(--bg-page);
      border-radius: var(--radius-md);
      padding: 24px;
      border: 1px solid var(--border-color);
    }

    .about-item-icon {
      width: 44px;
      height: 44px;
      border-radius: 10px;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      margin-bottom: 16px;
      font-weight: bold;
    }

    .about-item h3 {
      font-size: 17px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .about-item p {
      font-size: 13.5px;
      color: var(--text-body);
      line-height: 1.6;
    }

    /* Models Aggregation Tag Cloud */
    .models-chip-grid {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 32px;
    }

    .model-chip {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 8px 16px;
      border-radius: var(--radius-full);
      font-size: 13px;
      font-weight: 600;
      color: var(--text-body);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .model-chip::before {
      content: "";
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--accent-emerald);
    }

    .model-chip:hover {
      border-color: var(--primary);
      color: var(--primary);
      transform: translateY(-2px);
      box-shadow: var(--shadow-md);
    }

    /* Scenarios Grid (一站式制作) */
    .scenarios-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .scenario-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      position: relative;
      overflow: hidden;
    }

    .scenario-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: rgba(79, 70, 229, 0.4);
    }

    .scenario-tag {
      font-size: 11px;
      font-weight: 700;
      color: var(--primary);
      background: var(--primary-light);
      padding: 3px 8px;
      border-radius: 4px;
      width: fit-content;
      margin-bottom: 12px;
    }

    .scenario-card h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .scenario-card p {
      font-size: 13.5px;
      color: var(--text-body);
      line-height: 1.6;
      flex-grow: 1;
    }

    /* Comparison Table (对比评测) */
    .eval-highlight-box {
      background: linear-gradient(135deg, #1e1b4b 0%, #312e81 100%);
      color: #ffffff;
      border-radius: var(--radius-lg);
      padding: 32px;
      margin-bottom: 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
      box-shadow: var(--shadow-xl);
    }

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

    .eval-score-num {
      font-size: 48px;
      font-weight: 900;
      color: #fbbf24;
      line-height: 1;
    }

    .eval-score-max {
      font-size: 18px;
      opacity: 0.8;
    }

    .eval-stars {
      color: #fbbf24;
      font-size: 20px;
      letter-spacing: 2px;
    }

    .eval-table-container {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      overflow-x: auto;
      box-shadow: var(--shadow-md);
    }

    .eval-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
    }

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

    .eval-table th {
      background: #f8fafc;
      font-weight: 700;
      color: var(--text-main);
    }

    .eval-table th.col-highlight,
    .eval-table td.col-highlight {
      background: rgba(79, 70, 229, 0.04);
      font-weight: 600;
      color: var(--primary-dark);
    }

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

    .eval-badge-win {
      background: #dcfce7;
      color: #15803d;
      padding: 3px 8px;
      border-radius: 4px;
      font-size: 12px;
      font-weight: 700;
    }

    /* Workflow Timeline */
    .timeline-grid {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 16px;
    }

    .timeline-step {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px 18px;
      position: relative;
      box-shadow: var(--shadow-sm);
    }

    .step-number {
      font-size: 24px;
      font-weight: 900;
      color: var(--primary);
      margin-bottom: 8px;
    }

    .timeline-step h3 {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .timeline-step p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* Media Library & Cases */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .case-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }

    .case-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }

    .case-media-container {
      width: 100%;
      aspect-ratio: 16 / 10;
      background: #f1f5f9;
      overflow: hidden;
    }

    .case-media-container img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: transform 0.4s ease;
    }

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

    .case-content {
      padding: 20px;
      flex-grow: 1;
    }

    .case-content h3 {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    .case-content p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* Token Price Reference */
    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .pricing-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      position: relative;
      transition: var(--transition);
    }

    .pricing-card.featured {
      border-color: var(--primary);
      box-shadow: 0 10px 25px rgba(79, 70, 229, 0.15);
      transform: scale(1.02);
    }

    .pricing-featured-badge {
      position: absolute;
      top: -12px;
      right: 24px;
      background: linear-gradient(135deg, var(--accent-coral), var(--primary));
      color: #ffffff;
      font-size: 11px;
      font-weight: 700;
      padding: 4px 12px;
      border-radius: var(--radius-full);
      box-shadow: 0 2px 6px rgba(255, 67, 101, 0.3);
    }

    .pricing-header h3 {
      font-size: 20px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .pricing-price {
      font-size: 32px;
      font-weight: 900;
      color: var(--text-main);
      margin: 16px 0 8px;
    }

    .pricing-price span {
      font-size: 14px;
      color: var(--text-muted);
      font-weight: normal;
    }

    .pricing-features {
      list-style: none;
      margin: 24px 0;
      flex-grow: 1;
    }

    .pricing-features li {
      font-size: 13.5px;
      color: var(--text-body);
      padding: 8px 0;
      border-bottom: 1px dashed var(--border-color);
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .pricing-features li::before {
      content: "✓";
      color: var(--accent-emerald);
      font-weight: 800;
    }

    /* FAQ Accordion */
    .faq-container {
      max-width: 900px;
      margin: 0 auto;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      margin-bottom: 12px;
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-item:hover {
      border-color: var(--border-hover);
    }

    .faq-question {
      width: 100%;
      text-align: left;
      background: transparent;
      border: none;
      padding: 20px 24px;
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
    }

    .faq-icon {
      width: 20px;
      height: 20px;
      border-radius: 50%;
      background: var(--bg-alt);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 14px;
      color: var(--text-body);
      flex-shrink: 0;
      transition: transform 0.25s ease;
    }

    .faq-item.active .faq-icon {
      transform: rotate(45deg);
      background: var(--primary);
      color: #ffffff;
    }

    .faq-answer {
      display: none;
      padding: 0 24px 20px;
      font-size: 14.5px;
      color: var(--text-body);
      line-height: 1.7;
      border-top: 1px solid #f8fafc;
    }

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

    /* Testimonials (6 User Reviews) */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

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

    .review-text {
      font-size: 13.5px;
      color: var(--text-body);
      line-height: 1.6;
      margin-bottom: 16px;
    }

    .review-stars {
      color: #f59e0b;
      font-size: 13px;
      margin-bottom: 12px;
    }

    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f1f5f9;
      padding-top: 12px;
    }

    .review-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary), var(--accent-coral));
      color: #ffffff;
      font-weight: bold;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 14px;
    }

    .review-name {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-main);
    }

    .review-role {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* Form & Contact Section */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1.2fr 1fr;
      gap: 32px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-md);
    }

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

    .form-label {
      display: block;
      font-size: 13.5px;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    .form-input,
    .form-select,
    .form-textarea {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 14px;
      background: #f8fafc;
      color: var(--text-main);
      outline: none;
      transition: var(--transition);
    }

    .form-input:focus,
    .form-select:focus,
    .form-textarea:focus {
      border-color: var(--primary);
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
    }

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

    .btn-submit {
      width: 100%;
      padding: 14px;
      background: linear-gradient(135deg, var(--primary) 0%, var(--accent-violet) 100%);
      color: #ffffff;
      font-size: 15px;
      font-weight: 700;
      border: none;
      border-radius: var(--radius-sm);
      cursor: pointer;
      box-shadow: 0 4px 12px rgba(79, 70, 229, 0.25);
      transition: var(--transition);
    }

    .btn-submit:hover {
      box-shadow: 0 6px 18px rgba(79, 70, 229, 0.35);
      transform: translateY(-1px);
    }

    .contact-info-card {
      background: var(--bg-page);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .contact-detail-list {
      list-style: none;
      margin-bottom: 24px;
    }

    .contact-detail-item {
      padding: 10px 0;
      border-bottom: 1px solid var(--border-color);
      display: flex;
      justify-content: space-between;
      font-size: 13.5px;
    }

    .contact-detail-item strong {
      color: var(--text-main);
    }

    .qr-box {
      text-align: center;
      background: #ffffff;
      padding: 18px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
    }

    .qr-box img {
      max-width: 140px;
      height: auto;
      margin: 0 auto 10px;
      display: block;
      border-radius: 6px;
    }

    .qr-box p {
      font-size: 12px;
      color: var(--text-muted);
      font-weight: 600;
    }

    /* Articles & Links */
    .articles-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      margin-bottom: 30px;
    }

    .article-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 18px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .article-item:hover {
      border-color: var(--primary);
      transform: translateY(-2px);
    }

    .article-item a {
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
      display: block;
      line-height: 1.5;
    }

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

    /* Friendly Links */
    .friendly-links-wrap {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px 24px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 16px;
      font-size: 13px;
    }

    .friendly-links-wrap strong {
      color: var(--text-main);
      margin-right: 8px;
    }

    .friendly-links-wrap a {
      color: var(--text-body);
      padding: 4px 10px;
      background: var(--bg-alt);
      border-radius: 4px;
    }

    .friendly-links-wrap a:hover {
      color: var(--primary);
      background: var(--primary-light);
    }

    /* Footer */
    .site-footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 48px 0 24px;
      border-top: 1px solid #1e293b;
      margin-top: 60px;
    }

    .footer-top {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.2fr;
      gap: 32px;
      padding-bottom: 36px;
      border-bottom: 1px solid #1e293b;
    }

    .footer-brand h4 {
      font-size: 20px;
      color: #ffffff;
      font-weight: 800;
      margin-bottom: 12px;
    }

    .footer-brand p {
      font-size: 13.5px;
      line-height: 1.7;
      max-width: 320px;
    }

    .footer-col h5 {
      font-size: 15px;
      color: #ffffff;
      font-weight: 700;
      margin-bottom: 16px;
    }

    .footer-col ul {
      list-style: none;
    }

    .footer-col ul li {
      margin-bottom: 8px;
    }

    .footer-col ul li a {
      font-size: 13px;
      color: #94a3b8;
    }

    .footer-col ul li a:hover {
      color: #ffffff;
    }

    .footer-bottom {
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 12.5px;
      flex-wrap: wrap;
      gap: 12px;
    }

    .footer-bottom a {
      color: #cbd5e1;
    }

    /* Floating Customer Service & Back to Top */
    .float-dock {
      position: fixed;
      right: 24px;
      bottom: 32px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      z-index: 999;
    }

    .dock-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-lg);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      color: var(--text-main);
      font-size: 18px;
      transition: var(--transition);
      position: relative;
    }

    .dock-btn:hover {
      background: var(--primary);
      color: #ffffff;
      transform: translateY(-2px);
    }

    .dock-btn.btn-kefu {
      background: var(--accent-coral);
      color: #ffffff;
      border: none;
    }

    .dock-btn.btn-kefu:hover {
      background: #e11d48;
    }

    /* Responsive */
    @media (max-width: 1024px) {
      .hero-stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .about-grid,
      .scenarios-grid,
      .cases-grid,
      .pricing-grid,
      .reviews-grid,
      .articles-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .timeline-grid {
        grid-template-columns: repeat(3, 1fr);
      }
      .footer-top {
        grid-template-columns: 1fr 1fr;
      }
      .contact-wrapper {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .site-header .nav-links,
      .site-header .header-actions .btn-header-ghost {
        display: none;
      }
      .mobile-menu-btn {
        display: block;
      }
      .hero-title {
        font-size: 28px;
      }
      .hero-subtitle {
        font-size: 15px;
      }
      .about-grid,
      .scenarios-grid,
      .cases-grid,
      .pricing-grid,
      .reviews-grid,
      .articles-grid,
      .timeline-grid,
      .hero-stats-grid {
        grid-template-columns: 1fr;
      }
      .footer-top {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
      }
    }