:root {
      --primary: #4338ca;
      --primary-light: #6366f1;
      --secondary: #ec4899;
      --accent: #f59e0b;
      --accent-green: #10b981;
      --accent-cyan: #06b6d4;
      --bg-base: #fdfbf7;
      --bg-subtle: #f8fafc;
      --card-bg: #ffffff;
      --text-dark: #1e1b4b;
      --text-muted: #475569;
      --text-light: #64748b;
      --border-color: #1e1b4b;
      --border-light: #e2e8f0;
      --graffiti-border: 2px solid #1e1b4b;
      --shadow-flat: 4px 4px 0px #1e1b4b;
      --shadow-hover: 6px 6px 0px #1e1b4b;
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      font-family: var(--font-main);
      background-color: var(--bg-base);
      color: var(--text-dark);
      line-height: 1.6;
      overflow-x: hidden;
      background-image: 
        radial-gradient(#e0e7ff 1.5px, transparent 1.5px),
        radial-gradient(#fce7f3 1.5px, #fdfbf7 1.5px);
      background-size: 40px 40px;
      background-position: 0 0, 20px 20px;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.2s ease;
    }

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

    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background-color: rgba(253, 251, 247, 0.95);
      border-bottom: 2px solid var(--border-color);
      backdrop-filter: blur(8px);
    }

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

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

    .brand-area .ai-page-logo {
      height: 40px;
      width: auto;
      object-fit: contain;
      display: block;
    }

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

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

    .nav-links li {
      margin: 0 2px;
    }

    .nav-links a {
      display: inline-block;
      padding: 6px 10px;
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-dark);
      border-radius: var(--radius-sm);
      border: 1px solid transparent;
      transition: all 0.2s ease;
    }

    .nav-links a:hover,
    .nav-links a:focus {
      background-color: #fef08a;
      border: 1px solid var(--border-color);
      box-shadow: 2px 2px 0px var(--border-color);
      transform: translateY(-2px);
    }

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

    .btn-header {
      padding: 8px 16px;
      font-size: 0.9rem;
      font-weight: 700;
      color: #fff;
      background-color: var(--primary);
      border: var(--graffiti-border);
      box-shadow: var(--shadow-flat);
      border-radius: var(--radius-sm);
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }

    .btn-header:hover {
      box-shadow: var(--shadow-hover);
      transform: translate(-2px, -2px);
      background-color: var(--primary-light);
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: var(--graffiti-border);
      border-radius: var(--radius-sm);
      padding: 6px;
      cursor: pointer;
      box-shadow: 2px 2px 0px var(--border-color);
    }

    .mobile-menu-btn span {
      display: block;
      width: 22px;
      height: 3px;
      background-color: var(--text-dark);
      margin: 4px 0;
      border-radius: 2px;
    }

    .hero-section {
      padding: 70px 0 60px;
      position: relative;
    }

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

    .badge-graffiti {
      display: inline-block;
      padding: 6px 16px;
      font-size: 0.85rem;
      font-weight: 800;
      background-color: #fef08a;
      color: var(--text-dark);
      border: var(--graffiti-border);
      border-radius: 30px;
      box-shadow: 3px 3px 0px var(--border-color);
      margin-bottom: 24px;
      transform: rotate(-1deg);
    }

    .hero-title {
      font-size: clamp(2rem, 4.5vw, 3.2rem);
      font-weight: 900;
      line-height: 1.25;
      color: var(--text-dark);
      margin-bottom: 20px;
      letter-spacing: -1px;
    }

    .hero-title .highlight-scribble {
      position: relative;
      display: inline-block;
      color: var(--primary);
      text-decoration: underline wavy var(--secondary) 3px;
      text-underline-offset: 6px;
    }

    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-muted);
      max-width: 780px;
      margin: 0 auto 32px;
      line-height: 1.7;
    }

    .hero-cta-group {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 40px;
    }

    .btn-main {
      padding: 14px 32px;
      font-size: 1.05rem;
      font-weight: 800;
      border: var(--graffiti-border);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-flat);
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
    }

    .btn-main:hover {
      box-shadow: var(--shadow-hover);
      transform: translate(-3px, -3px);
    }

    .btn-primary-action {
      background-color: var(--accent);
      color: #1e1b4b;
    }

    .btn-secondary-action {
      background-color: #ffffff;
      color: var(--text-dark);
    }

    .hero-ticker-box {
      background-color: #ffffff;
      border: var(--graffiti-border);
      box-shadow: var(--shadow-flat);
      border-radius: var(--radius-md);
      padding: 18px 24px;
      text-align: left;
      margin-top: 10px;
    }

    .ticker-label {
      font-size: 0.85rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .model-tags-wrapper {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }

    .model-pill {
      font-size: 0.8rem;
      font-weight: 700;
      padding: 4px 10px;
      background-color: var(--bg-subtle);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      color: var(--text-dark);
    }

    .section-spacing {
      padding: 60px 0;
    }

    .section-header-block {
      text-align: center;
      max-width: 800px;
      margin: 0 auto 48px;
    }

    .section-eyebrow {
      display: inline-block;
      font-size: 0.85rem;
      font-weight: 800;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: var(--primary);
      margin-bottom: 8px;
      background: #e0e7ff;
      padding: 3px 12px;
      border: 1px solid var(--border-color);
      border-radius: 20px;
    }

    .section-title {
      font-size: clamp(1.6rem, 3vw, 2.3rem);
      font-weight: 800;
      color: var(--text-dark);
      margin-bottom: 12px;
    }

    .section-lead {
      font-size: 1rem;
      color: var(--text-muted);
    }

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

    .stat-card {
      background: #ffffff;
      border: var(--graffiti-border);
      box-shadow: var(--shadow-flat);
      border-radius: var(--radius-md);
      padding: 24px;
      text-align: center;
      transition: all 0.2s ease;
    }

    .stat-card:hover {
      transform: translate(-3px, -3px);
      box-shadow: var(--shadow-hover);
    }

    .stat-val {
      font-size: 2.2rem;
      font-weight: 900;
      color: var(--primary);
      margin-bottom: 6px;
    }

    .stat-txt {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-dark);
    }

    .stat-sub {
      font-size: 0.8rem;
      color: var(--text-light);
      margin-top: 4px;
    }

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

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

    .graffiti-card {
      background: #ffffff;
      border: var(--graffiti-border);
      box-shadow: var(--shadow-flat);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: all 0.25s ease;
    }

    .graffiti-card:hover {
      transform: translate(-4px, -4px);
      box-shadow: var(--shadow-hover);
    }

    .card-icon {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-sm);
      border: var(--graffiti-border);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      margin-bottom: 16px;
      background-color: #fef08a;
    }

    .graffiti-card:nth-child(2n) .card-icon { background-color: #bae6fd; }
    .graffiti-card:nth-child(3n) .card-icon { background-color: #fbcfe8; }
    .graffiti-card:nth-child(4n) .card-icon { background-color: #bbf7d0; }

    .card-title {
      font-size: 1.2rem;
      font-weight: 800;
      margin-bottom: 10px;
      color: var(--text-dark);
    }

    .card-p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }

    .card-tag {
      align-self: flex-start;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 2px 8px;
      border: 1px solid var(--border-color);
      border-radius: 4px;
      background: var(--bg-subtle);
    }

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

    .step-box {
      background: #ffffff;
      border: var(--graffiti-border);
      box-shadow: var(--shadow-flat);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
    }

    .step-num {
      position: absolute;
      top: -14px;
      right: 14px;
      font-size: 0.85rem;
      font-weight: 900;
      background: #f43f5e;
      color: #fff;
      padding: 2px 10px;
      border: var(--graffiti-border);
      border-radius: 12px;
      box-shadow: 2px 2px 0px var(--border-color);
    }

    .step-title {
      font-size: 1.1rem;
      font-weight: 800;
      margin-bottom: 10px;
      color: var(--text-dark);
    }

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

    .evaluation-card {
      background: #ffffff;
      border: var(--graffiti-border);
      box-shadow: 6px 6px 0px var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
    }

    .score-summary-bar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
      padding-bottom: 28px;
      border-bottom: 2px dashed var(--border-color);
      margin-bottom: 28px;
    }

    .score-left {
      display: flex;
      align-items: center;
      gap: 24px;
    }

    .score-big {
      font-size: 3.5rem;
      font-weight: 900;
      color: var(--secondary);
      line-height: 1;
      display: flex;
      align-items: baseline;
    }

    .score-big span {
      font-size: 1.2rem;
      color: var(--text-light);
      margin-left: 4px;
    }

    .score-meta h4 {
      font-size: 1.3rem;
      font-weight: 800;
      color: var(--text-dark);
    }

    .score-stars {
      color: #f59e0b;
      font-size: 1.2rem;
      margin-top: 4px;
    }

    .table-container {
      width: 100%;
      overflow-x: auto;
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.95rem;
    }

    .compare-table th,
    .compare-table td {
      padding: 14px 16px;
      border-bottom: 1px solid var(--border-light);
    }

    .compare-table th {
      background-color: #f1f5f9;
      font-weight: 800;
      color: var(--text-dark);
      border-top: 1px solid var(--border-color);
      border-bottom: 2px solid var(--border-color);
    }

    .compare-table tr:hover td {
      background-color: #faf5ff;
    }

    .feature-badge-win {
      font-weight: 700;
      color: #047857;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    .feature-badge-lose {
      color: #94a3b8;
    }

    .media-card-grid {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 24px;
    }

    .media-card {
      background: #ffffff;
      border: var(--graffiti-border);
      box-shadow: var(--shadow-flat);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }

    .media-frame {
      width: 100%;
      overflow: hidden;
      background: #e2e8f0;
    }

    .media-frame img {
      width: 100%;
      height: auto;
      display: block;
      object-fit: cover;
    }

    .media-content {
      padding: 20px;
    }

    .pricing-table-wrap {
      background: #ffffff;
      border: var(--graffiti-border);
      box-shadow: var(--shadow-flat);
      border-radius: var(--radius-md);
      overflow: hidden;
    }

    .form-section-layout {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 36px;
      background: #ffffff;
      border: var(--graffiti-border);
      box-shadow: 6px 6px 0px var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
    }

    .form-info-col h3 {
      font-size: 1.8rem;
      font-weight: 800;
      margin-bottom: 16px;
      color: var(--text-dark);
    }

    .contact-item-list {
      list-style: none;
      margin: 24px 0;
    }

    .contact-item-list li {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
      font-size: 0.95rem;
      font-weight: 700;
    }

    .qr-box {
      margin-top: 24px;
      display: inline-block;
      border: var(--graffiti-border);
      padding: 10px;
      border-radius: var(--radius-sm);
      background: #ffffff;
      text-align: center;
    }

    .qr-box img {
      max-width: 120px;
      height: auto;
      display: block;
      margin: 0 auto 6px;
    }

    .qr-box span {
      font-size: 0.8rem;
      font-weight: 700;
      color: var(--text-muted);
    }

    .custom-form {
      display: flex;
      flex-direction: column;
      gap: 18px;
    }

    .form-row {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .form-row label {
      font-size: 0.9rem;
      font-weight: 800;
      color: var(--text-dark);
    }

    .form-input,
    .form-select,
    .form-textarea {
      width: 100%;
      padding: 12px 14px;
      font-size: 0.95rem;
      border: var(--graffiti-border);
      border-radius: var(--radius-sm);
      background: #f8fafc;
      color: var(--text-dark);
      outline: none;
      font-family: inherit;
    }

    .form-input:focus,
    .form-select:focus,
    .form-textarea:focus {
      background: #ffffff;
      box-shadow: 3px 3px 0px var(--primary);
    }

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

    .faq-accordion {
      display: flex;
      flex-direction: column;
      gap: 14px;
      max-width: 900px;
      margin: 0 auto;
    }

    .faq-item {
      background: #ffffff;
      border: var(--graffiti-border);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-flat);
      overflow: hidden;
      transition: all 0.2s ease;
    }

    .faq-question {
      width: 100%;
      padding: 18px 24px;
      text-align: left;
      font-size: 1.05rem;
      font-weight: 800;
      background: none;
      border: none;
      color: var(--text-dark);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
    }

    .faq-question:hover {
      background-color: #faf5ff;
    }

    .faq-icon {
      font-size: 1.2rem;
      font-weight: 900;
      transition: transform 0.25s ease;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
      padding: 0 24px;
      background: #fafafa;
    }

    .faq-answer p {
      padding-bottom: 20px;
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    .faq-item.active .faq-answer {
      max-height: 600px;
      transition: max-height 0.4s ease-in-out;
    }

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

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

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

    .review-user-info {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-top: 18px;
      padding-top: 14px;
      border-top: 1px dashed var(--border-light);
    }

    .review-avatar-char {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      border: var(--graffiti-border);
      background: #fed7aa;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      font-size: 1.1rem;
    }

    .review-text {
      font-size: 0.95rem;
      color: var(--text-dark);
      line-height: 1.6;
      font-style: italic;
    }

    .review-name {
      font-size: 0.95rem;
      font-weight: 800;
      color: var(--text-dark);
    }

    .review-role {
      font-size: 0.8rem;
      color: var(--text-light);
    }

    .agent-box {
      background: linear-gradient(135deg, #fef08a 0%, #fed7aa 100%);
      border: var(--graffiti-border);
      box-shadow: 6px 6px 0px var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      text-align: center;
    }

    .agent-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      margin: 32px 0;
      text-align: left;
    }

    .agent-item {
      background: #ffffff;
      border: var(--graffiti-border);
      padding: 20px;
      border-radius: var(--radius-md);
      box-shadow: 3px 3px 0px var(--border-color);
    }

    .article-links-container {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 16px;
    }

    .article-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 8px 14px;
      background: #ffffff;
      border: var(--graffiti-border);
      border-radius: var(--radius-sm);
      box-shadow: 2px 2px 0px var(--border-color);
      font-size: 0.88rem;
      font-weight: 700;
    }

    .article-badge:hover {
      background: #fbcfe8;
      transform: translateY(-2px);
    }

    .site-footer {
      background-color: #1e1b4b;
      color: #ffffff;
      border-top: 4px solid #000000;
      padding: 60px 0 30px;
      margin-top: 60px;
    }

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

    .footer-brand h4 {
      font-size: 1.4rem;
      font-weight: 900;
      margin-bottom: 12px;
      color: #fef08a;
    }

    .footer-brand p {
      font-size: 0.9rem;
      color: #cbd5e1;
      line-height: 1.6;
      max-width: 320px;
    }

    .footer-col h5 {
      font-size: 1rem;
      font-weight: 800;
      margin-bottom: 16px;
      color: #ffffff;
      border-bottom: 2px solid var(--accent);
      display: inline-block;
      padding-bottom: 4px;
    }

    .footer-links-list {
      list-style: none;
    }

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

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

    .footer-links-list a:hover {
      color: #fef08a;
      text-decoration: underline;
    }

    .friend-links-bar {
      border-top: 1px solid #334155;
      padding-top: 24px;
      margin-bottom: 24px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 16px;
      font-size: 0.88rem;
    }

    .friend-links-bar span {
      color: #fef08a;
      font-weight: 800;
    }

    .friend-links-bar a {
      color: #94a3b8;
    }

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

    .footer-bottom-bar {
      border-top: 1px solid #334155;
      padding-top: 20px;
      text-align: center;
      font-size: 0.82rem;
      color: #64748b;
    }

    .floating-tools {
      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: #ffffff;
      border: var(--graffiti-border);
      box-shadow: 3px 3px 0px var(--border-color);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      cursor: pointer;
      color: var(--text-dark);
      transition: all 0.2s;
    }

    .float-btn:hover {
      transform: translate(-2px, -2px);
      box-shadow: 5px 5px 0px var(--border-color);
      background: #fef08a;
    }

    @media (max-width: 1024px) {
      .card-grid-4 { grid-template-columns: repeat(2, 1fr); }
      .card-grid-3 { grid-template-columns: repeat(2, 1fr); }
      .stats-grid { grid-template-columns: repeat(2, 1fr); }
      .steps-wrapper { grid-template-columns: repeat(2, 1fr); }
      .review-grid { grid-template-columns: repeat(2, 1fr); }
      .agent-grid { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: repeat(2, 1fr); }
      .media-card-grid { grid-template-columns: 1fr; }
    }

    @media (max-width: 768px) {
      .mobile-menu-btn { display: block; }
      .nav-links {
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        border-bottom: 2px solid var(--border-color);
        flex-direction: column;
        padding: 20px;
        display: none;
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links li { width: 100%; text-align: center; margin: 4px 0; }
      .header-actions .btn-header { display: none; }
      .card-grid-3, .card-grid-4, .stats-grid, .steps-wrapper, .review-grid, .agent-grid, .footer-grid {
        grid-template-columns: 1fr;
      }
      .form-section-layout { grid-template-columns: 1fr; padding: 24px; }
      .score-summary-bar { flex-direction: column; align-items: flex-start; }
    }