/* CSS Reset & Variables */
    :root {
      --primary: #1d4ed8;
      --primary-dark: #1e40af;
      --primary-light: #3b82f6;
      --primary-subtle: #eff6ff;
      --accent: #0284c7;
      --accent-cyan: #06b6d4;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-light: #64748b;
      --bg-page: #f8fafc;
      --bg-card: #ffffff;
      --bg-alt: #f1f5f9;
      --border-color: #e2e8f0;
      --border-focus: #93c5fd;
      --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
      --shadow-md: 0 4px 12px -2px rgba(15, 23, 42, 0.08);
      --shadow-lg: 0 12px 28px -4px rgba(15, 23, 42, 0.12);
      --shadow-blue: 0 8px 24px -4px rgba(29, 78, 216, 0.25);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 18px;
      --container-max: 1200px;
      --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }

    *, *::before, *::after {
      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;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

    /* Top Navigation */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

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

    .brand-logo-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
      color: var(--text-main);
    }

    .brand-logo-wrap img {
      max-height: 40px;
      width: auto;
      display: block;
    }

    .brand-name {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--primary-dark);
      letter-spacing: -0.5px;
    }

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

    .nav-links li a {
      display: block;
      padding: 8px 14px;
      color: var(--text-muted);
      font-weight: 500;
      font-size: 0.92rem;
      text-decoration: none;
      border-radius: var(--radius-sm);
      transition: var(--transition);
    }

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

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

    .btn-nav-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 8px 18px;
      background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
      color: #ffffff !important;
      text-decoration: none;
      font-size: 0.9rem;
      font-weight: 600;
      border-radius: 9999px;
      box-shadow: 0 2px 8px rgba(29, 78, 216, 0.3);
      transition: var(--transition);
      border: none;
      cursor: pointer;
    }

    .btn-nav-primary:hover {
      transform: translateY(-1px);
      box-shadow: 0 4px 14px rgba(29, 78, 216, 0.4);
    }

    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      color: var(--text-main);
      font-size: 1.5rem;
      cursor: pointer;
      padding: 4px;
    }

    /* Section Global Headers */
    .section-padding {
      padding: 72px 0;
    }

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

    .section-eyebrow {
      display: inline-block;
      font-size: 0.82rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1.2px;
      color: var(--primary);
      background-color: var(--primary-subtle);
      padding: 4px 14px;
      border-radius: 9999px;
      margin-bottom: 12px;
      border: 1px solid rgba(59, 130, 246, 0.2);
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 14px;
      letter-spacing: -0.5px;
    }

    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Hero Section (No Images Allowed) */
    .hero-section {
      background: radial-gradient(circle at 50% 20%, #eff6ff 0%, #dbeafe 45%, #f8fafc 100%);
      padding: 70px 0 60px 0;
      border-bottom: 1px solid var(--border-color);
      position: relative;
      overflow: hidden;
    }

    .hero-content-box {
      max-width: 880px;
      margin: 0 auto;
      text-align: center;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #ffffff;
      border: 1px solid #bfdbfe;
      padding: 6px 16px;
      border-radius: 9999px;
      font-size: 0.88rem;
      color: var(--primary-dark);
      font-weight: 600;
      box-shadow: var(--shadow-sm);
      margin-bottom: 24px;
    }

    .hero-badge-pulse {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background-color: #10b981;
      display: inline-block;
      box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
    }

    .hero-title {
      font-size: 2.6rem;
      font-weight: 900;
      color: #0b1a3c;
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -0.8px;
    }

    .hero-subtitle {
      font-size: 1.15rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 32px;
      max-width: 740px;
      margin-left: auto;
      margin-right: auto;
    }

    .hero-cta-group {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 44px;
    }

    .btn-official-hero {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: linear-gradient(135deg, #1d4ed8 0%, #1e40af 100%);
      color: #ffffff;
      padding: 14px 34px;
      font-size: 1.05rem;
      font-weight: 700;
      border-radius: 12px;
      text-decoration: none;
      box-shadow: var(--shadow-blue);
      transition: var(--transition);
      border: 1px solid rgba(255, 255, 255, 0.2);
    }

    .btn-official-hero:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 28px rgba(29, 78, 216, 0.35);
      background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
    }

    .btn-secondary-hero {
      display: inline-flex;
      align-items: center;
      background: #ffffff;
      color: var(--primary-dark);
      padding: 14px 28px;
      font-size: 1.02rem;
      font-weight: 600;
      border-radius: 12px;
      text-decoration: none;
      border: 1px solid #bfdbfe;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .btn-secondary-hero:hover {
      background-color: var(--primary-subtle);
      border-color: var(--primary-light);
    }

    /* Stats Grid (Pure CSS inside Hero) */
    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      background: rgba(255, 255, 255, 0.85);
      backdrop-filter: blur(8px);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px 16px;
      box-shadow: var(--shadow-sm);
    }

    .stat-item {
      text-align: center;
    }

    .stat-number {
      font-size: 1.7rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 2px;
    }

    .stat-label {
      font-size: 0.85rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* Model Badges Strip */
    .model-pills-bar {
      margin-top: 28px;
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 8px;
    }

    .model-pill {
      background: #ffffff;
      border: 1px solid var(--border-color);
      font-size: 0.76rem;
      font-weight: 600;
      color: var(--text-muted);
      padding: 4px 10px;
      border-radius: 6px;
    }

    /* Grid Layouts */
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
      align-items: center;
    }

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

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

    /* Cards */
    .feature-card {
      background: var(--bg-card);
      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;
      height: 100%;
    }

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

    .card-icon {
      width: 44px;
      height: 44px;
      border-radius: 10px;
      background: var(--primary-subtle);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1.1rem;
      margin-bottom: 16px;
      border: 1px solid rgba(59, 130, 246, 0.2);
    }

    .card-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .card-desc {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    .card-tag {
      display: inline-block;
      align-self: flex-start;
      margin-top: 14px;
      font-size: 0.75rem;
      font-weight: 600;
      color: var(--primary);
      background: var(--primary-subtle);
      padding: 3px 8px;
      border-radius: 4px;
    }

    /* Workflow Steps */
    .flow-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

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

    .flow-number {
      font-size: 1.8rem;
      font-weight: 900;
      color: #bfdbfe;
      margin-bottom: 8px;
      line-height: 1;
    }

    .flow-title {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .flow-desc {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.55;
    }

    /* Comparison Table / Evaluation Section */
    .eval-highlight-box {
      background: linear-gradient(135deg, #1e40af 0%, #1d4ed8 100%);
      color: #ffffff;
      border-radius: var(--radius-lg);
      padding: 36px 32px;
      margin-bottom: 36px;
      box-shadow: var(--shadow-blue);
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
    }

    .eval-score-wrap {
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .eval-score-num {
      font-size: 3.6rem;
      font-weight: 900;
      line-height: 1;
      color: #ffffff;
    }

    .eval-score-meta h4 {
      font-size: 1.3rem;
      font-weight: 700;
      margin-bottom: 4px;
    }

    .eval-score-meta p {
      font-size: 0.9rem;
      color: #bfdbfe;
    }

    .stars-render {
      color: #fbbf24;
      font-size: 1.3rem;
      letter-spacing: 2px;
    }

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

    .custom-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.92rem;
    }

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

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

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

    .highlight-col {
      background-color: #eff6ff;
      font-weight: 600;
      color: var(--primary-dark);
    }

    .badge-win {
      background-color: #dbeafe;
      color: var(--primary);
      padding: 2px 8px;
      border-radius: 4px;
      font-size: 0.78rem;
      font-weight: 700;
    }

    /* Interactive Matcher / Tab Box */
    .matcher-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }

    .matcher-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      margin-top: 24px;
    }

    .matcher-item {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px;
      background: #f8fafc;
      transition: var(--transition);
    }

    .matcher-item:hover {
      border-color: var(--primary-light);
      background: #ffffff;
      box-shadow: var(--shadow-sm);
    }

    /* Testimonials Grid */
    .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-quote {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 20px;
    }

    .review-user-info {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 14px;
    }

    .avatar-placeholder {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--primary-subtle);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 0.9rem;
    }

    .user-meta-name {
      font-weight: 700;
      font-size: 0.92rem;
      color: var(--text-main);
    }

    .user-meta-role {
      font-size: 0.78rem;
      color: var(--text-light);
    }

    /* FAQ Accordion */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
    }

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

    .faq-item.active {
      border-color: #bfdbfe;
    }

    .faq-question {
      padding: 18px 22px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-weight: 700;
      font-size: 1rem;
      color: var(--text-main);
      background: #ffffff;
      user-select: none;
    }

    .faq-icon {
      font-size: 1.2rem;
      color: var(--primary);
      transition: transform 0.25s ease;
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background: #f8fafc;
      color: var(--text-muted);
      font-size: 0.92rem;
      line-height: 1.65;
      padding: 0 22px;
    }

    .faq-item.active .faq-answer {
      max-height: 240px;
      padding: 16px 22px 20px 22px;
      border-top: 1px solid var(--border-color);
    }

    /* Media/Cases Showcase Section */
    .case-gallery-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
      margin-bottom: 24px;
    }

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

    .media-card img {
      width: 100%;
      height: auto;
      display: block;
      transition: transform 0.3s ease;
    }

    .media-card:hover img {
      transform: scale(1.02);
    }

    .media-card-body {
      padding: 16px 20px;
    }

    .media-card-title {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 4px;
    }

    .media-card-desc {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    .banner-strip-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
    }

    .banner-thumb {
      border-radius: var(--radius-sm);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .banner-thumb img {
      width: 100%;
      height: auto;
      display: block;
    }

    /* Agency & Contact Form Section */
    .form-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-md);
    }

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

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

    .form-control {
      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: #ffffff;
      transition: var(--transition);
      outline: none;
    }

    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
    }

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

    .btn-submit-form {
      width: 100%;
      padding: 14px;
      background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
      color: #ffffff;
      font-size: 1rem;
      font-weight: 700;
      border: none;
      border-radius: var(--radius-sm);
      cursor: pointer;
      box-shadow: var(--shadow-blue);
      transition: var(--transition);
    }

    .btn-submit-form:hover {
      background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
      transform: translateY(-1px);
    }

    .contact-info-list {
      list-style: none;
      margin-top: 20px;
    }

    .contact-info-item {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      margin-bottom: 16px;
      font-size: 0.95rem;
      color: var(--text-muted);
    }

    .contact-info-item strong {
      color: var(--text-main);
      min-width: 80px;
    }

    .qr-card-wrap {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      margin-top: 24px;
    }

    .qr-card-wrap img {
      max-width: 160px;
      height: auto;
      margin: 0 auto 10px auto;
      display: block;
      border-radius: var(--radius-sm);
    }

    /* Articles / Knowledge Section */
    .article-links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 16px;
    }

    .article-chip {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 8px 16px;
      border-radius: var(--radius-sm);
      font-size: 0.88rem;
      color: var(--text-main);
      text-decoration: none;
      transition: var(--transition);
    }

    .article-chip:hover {
      border-color: var(--primary);
      color: var(--primary);
      background-color: var(--primary-subtle);
    }

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

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 36px;
      margin-bottom: 40px;
    }

    .footer-brand h3 {
      color: #ffffff;
      font-size: 1.3rem;
      font-weight: 800;
      margin-bottom: 12px;
    }

    .footer-brand p {
      font-size: 0.88rem;
      line-height: 1.6;
      color: #94a3b8;
      max-width: 320px;
    }

    .footer-col h4 {
      color: #ffffff;
      font-size: 0.95rem;
      font-weight: 700;
      margin-bottom: 16px;
    }

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

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

    .footer-col ul li a {
      color: #94a3b8;
      text-decoration: none;
      font-size: 0.88rem;
      transition: var(--transition);
    }

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

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      font-size: 0.82rem;
      color: #64748b;
    }

    .friend-links-bar {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 14px;
    }

    .friend-links-bar a {
      color: #94a3b8;
      text-decoration: none;
      font-size: 0.82rem;
      transition: var(--transition);
    }

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

    .ai-page-home-link {
      color: #38bdf8;
      text-decoration: none;
      font-weight: 600;
    }

    /* Floating Widget */
    .floating-tools {
      position: fixed;
      right: 20px;
      bottom: 24px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .tool-btn {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      text-decoration: none;
      font-weight: 700;
      cursor: pointer;
      transition: var(--transition);
    }

    .tool-btn:hover {
      background: var(--primary);
      color: #ffffff;
      border-color: var(--primary);
    }

    /* Responsive Queries */
    @media (max-width: 992px) {
      .hero-title {
        font-size: 2.1rem;
      }
      .grid-4, .hero-stats-grid, .flow-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3, .matcher-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .banner-strip-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .mobile-menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 16px 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        padding: 10px 0;
      }
      .hero-title {
        font-size: 1.75rem;
      }
      .hero-stats-grid, .grid-2, .grid-3, .grid-4, .flow-grid, .matcher-grid, .case-gallery-grid, .banner-strip-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .eval-highlight-box {
        flex-direction: column;
        text-align: center;
      }
      .eval-score-wrap {
        flex-direction: column;
      }
    }