:root {
      --bg-page: #fbf9f4;
      --bg-card: #ffffff;
      --color-ink: #191b22;
      --color-muted: #565d6d;
      --color-primary: #ff5252;
      --color-accent-yellow: #ffd53d;
      --color-accent-cyan: #3fe0d0;
      --color-accent-blue: #4d7cfe;
      --color-accent-purple: #ab66ff;
      --color-accent-green: #3cd070;
      --border-dark: #1e1e24;
      --shadow-solid: 4px 4px 0px #1e1e24;
      --shadow-solid-sm: 2px 2px 0px #1e1e24;
      --shadow-solid-lg: 6px 6px 0px #1e1e24;
      --border-radius: 14px;
      --border-radius-sm: 8px;
      --container-max: 1200px;
    }

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

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

    body {
      background-color: var(--bg-page);
      background-image: 
        radial-gradient(#1e1e24 0.75px, transparent 0.75px),
        radial-gradient(#1e1e24 0.75px, var(--bg-page) 0.75px);
      background-size: 32px 32px;
      background-position: 0 0, 16px 16px;
      color: var(--color-ink);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.6;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
    }

    .container {
      width: 100%;
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 20px;
    }

    .section-wrap {
      padding: 64px 0;
      position: relative;
    }

    .section-head {
      text-align: center;
      margin-bottom: 44px;
      position: relative;
    }

    .badge-graffiti {
      display: inline-block;
      background: var(--color-accent-yellow);
      color: var(--border-dark);
      font-weight: 800;
      font-size: 0.85rem;
      padding: 4px 14px;
      border: 2px solid var(--border-dark);
      border-radius: 20px;
      box-shadow: var(--shadow-solid-sm);
      transform: rotate(-2deg);
      margin-bottom: 12px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 900;
      color: var(--color-ink);
      letter-spacing: -0.5px;
      margin-bottom: 10px;
      display: inline-block;
      position: relative;
    }

    .section-title::after {
      content: "";
      position: absolute;
      bottom: -6px;
      left: 10%;
      width: 80%;
      height: 6px;
      background: var(--color-accent-cyan);
      border: 2px solid var(--border-dark);
      border-radius: 4px;
      z-index: -1;
    }

    .section-desc {
      font-size: 1rem;
      color: var(--color-muted);
      max-width: 680px;
      margin: 0 auto;
    }

    .header-site {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: #fdfaf3;
      border-bottom: 3px solid var(--border-dark);
      box-shadow: 0 4px 0 rgba(30, 30, 36, 0.06);
    }

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

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

    .ai-page-logo {
      height: 42px;
      width: auto;
      display: block;
      border: 2px solid var(--border-dark);
      border-radius: 8px;
      background: #fff;
      padding: 2px;
      box-shadow: var(--shadow-solid-sm);
    }

    .brand-title {
      font-weight: 900;
      font-size: 1.25rem;
      color: var(--border-dark);
      letter-spacing: -0.5px;
    }

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

    .nav-links li a {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--border-dark);
      padding: 8px 14px;
      border-radius: 6px;
      transition: all 0.2s ease;
      display: inline-block;
    }

    .nav-links li a:hover {
      background: var(--color-accent-yellow);
      transform: translateY(-2px);
      box-shadow: var(--shadow-solid-sm);
    }

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

    .btn-graffiti {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.95rem;
      font-weight: 800;
      color: var(--border-dark);
      background: var(--color-primary);
      color: #fff;
      border: 2px solid var(--border-dark);
      border-radius: var(--border-radius-sm);
      box-shadow: var(--shadow-solid);
      cursor: pointer;
      transition: all 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
      text-align: center;
    }

    .btn-graffiti:hover {
      transform: translate(-2px, -2px);
      box-shadow: 6px 6px 0px var(--border-dark);
      color: #fff;
    }

    .btn-graffiti:active {
      transform: translate(2px, 2px);
      box-shadow: 1px 1px 0px var(--border-dark);
    }

    .btn-graffiti.btn-yellow {
      background: var(--color-accent-yellow);
      color: var(--border-dark);
    }

    .btn-graffiti.btn-cyan {
      background: var(--color-accent-cyan);
      color: var(--border-dark);
    }

    .btn-graffiti.btn-lg {
      padding: 14px 32px;
      font-size: 1.15rem;
    }

    .mobile-menu-btn {
      display: none;
      background: #fff;
      border: 2px solid var(--border-dark);
      border-radius: 6px;
      padding: 6px 10px;
      cursor: pointer;
      font-weight: 900;
      box-shadow: var(--shadow-solid-sm);
    }

    .hero-section {
      padding: 60px 0 80px 0;
      position: relative;
      background: #fdfbf7;
      border-bottom: 3px solid var(--border-dark);
      overflow: hidden;
    }

    .hero-container {
      position: relative;
      z-index: 2;
      text-align: center;
    }

    .hero-top-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      background: #fff;
      border: 2px solid var(--border-dark);
      border-radius: 30px;
      box-shadow: var(--shadow-solid);
      font-weight: 800;
      font-size: 0.9rem;
      margin-bottom: 24px;
      transform: rotate(1deg);
    }

    .hero-top-tag span.dot {
      width: 10px;
      height: 10px;
      background: var(--color-accent-green);
      border: 1.5px solid var(--border-dark);
      border-radius: 50%;
      display: inline-block;
    }

    .hero-h1 {
      font-size: 2.8rem;
      font-weight: 950;
      color: var(--color-ink);
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -1px;
    }

    .hero-h1 .highlight {
      background: linear-gradient(180deg, transparent 60%, var(--color-accent-yellow) 60%);
      padding: 0 4px;
      display: inline-block;
      transform: rotate(-1deg);
    }

    .hero-sub {
      font-size: 1.15rem;
      color: var(--color-muted);
      max-width: 820px;
      margin: 0 auto 36px auto;
      font-weight: 500;
    }

    .hero-btn-group {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 18px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }

    .hero-metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      max-width: 1040px;
      margin: 0 auto;
    }

    .metric-card {
      background: #fff;
      border: 2px solid var(--border-dark);
      border-radius: var(--border-radius);
      padding: 22px 18px;
      box-shadow: var(--shadow-solid);
      text-align: center;
      transition: all 0.2s ease;
      position: relative;
    }

    .metric-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-solid-lg);
    }

    .metric-num {
      font-size: 2.2rem;
      font-weight: 950;
      line-height: 1.1;
      margin-bottom: 6px;
      color: var(--border-dark);
    }

    .metric-label {
      font-size: 0.9rem;
      color: var(--color-muted);
      font-weight: 700;
    }

    .tag-cloud-wrapper {
      margin-top: 36px;
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 10px;
    }

    .tag-pill {
      background: #fff;
      border: 2px solid var(--border-dark);
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 0.85rem;
      font-weight: 700;
      box-shadow: var(--shadow-solid-sm);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .tag-pill:nth-child(even) {
      background: #fffbe8;
      transform: rotate(1deg);
    }

    .tag-pill:nth-child(odd) {
      transform: rotate(-1deg);
    }

    .card-graffiti {
      background: var(--bg-card);
      border: 2px solid var(--border-dark);
      border-radius: var(--border-radius);
      box-shadow: var(--shadow-solid);
      padding: 28px;
      transition: all 0.25s ease;
      position: relative;
      display: flex;
      flex-direction: column;
    }

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

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

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

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

    .card-header-icon {
      width: 48px;
      height: 48px;
      border: 2px solid var(--border-dark);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      font-weight: 900;
      margin-bottom: 16px;
      box-shadow: var(--shadow-solid-sm);
      background: var(--color-accent-yellow);
    }

    .card-title {
      font-size: 1.25rem;
      font-weight: 900;
      margin-bottom: 10px;
      color: var(--color-ink);
    }

    .card-desc {
      font-size: 0.92rem;
      color: var(--color-muted);
      line-height: 1.55;
      margin-bottom: 14px;
    }

    .chip-list {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      margin-top: auto;
    }

    .chip-tag {
      background: #f1f3f7;
      border: 1px solid var(--border-dark);
      border-radius: 4px;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 2px 8px;
    }

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

    .process-step-card {
      background: #fff;
      border: 2px solid var(--border-dark);
      border-radius: var(--border-radius);
      padding: 24px;
      box-shadow: var(--shadow-solid);
      position: relative;
    }

    .step-number-tag {
      position: absolute;
      top: -14px;
      left: 20px;
      background: var(--color-primary);
      color: #fff;
      font-weight: 900;
      font-size: 0.85rem;
      padding: 2px 10px;
      border: 2px solid var(--border-dark);
      border-radius: 12px;
      box-shadow: var(--shadow-solid-sm);
    }

    .compare-container {
      background: #fff;
      border: 3px solid var(--border-dark);
      border-radius: var(--border-radius);
      box-shadow: var(--shadow-solid-lg);
      padding: 32px;
      overflow-x: auto;
    }

    .score-summary-bar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: #fffde6;
      border: 2px solid var(--border-dark);
      border-radius: 12px;
      padding: 18px 24px;
      margin-bottom: 24px;
      flex-wrap: wrap;
      gap: 16px;
    }

    .score-badge {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .score-num {
      font-size: 2.2rem;
      font-weight: 950;
      color: var(--color-primary);
      border: 2px solid var(--border-dark);
      background: #fff;
      padding: 2px 14px;
      border-radius: 10px;
      box-shadow: var(--shadow-solid-sm);
    }

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

    .compare-table {
      width: 100%;
      border-collapse: separate;
      border-spacing: 0;
      margin-top: 10px;
      min-width: 640px;
    }

    .compare-table th, .compare-table td {
      border: 2px solid var(--border-dark);
      padding: 14px 18px;
      text-align: left;
      font-size: 0.95rem;
    }

    .compare-table th {
      background: #f4f6fa;
      font-weight: 900;
    }

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

    .compare-table td.brand-col {
      background: #fff8e8;
      font-weight: 800;
    }

    .check-yes {
      color: #0b8f44;
      font-weight: 900;
    }

    .check-no {
      color: #9aa1af;
      font-weight: 700;
    }

    .media-showcase-grid {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 24px;
      align-items: stretch;
    }

    .media-card {
      background: #fff;
      border: 2px solid var(--border-dark);
      border-radius: var(--border-radius);
      box-shadow: var(--shadow-solid);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }

    .media-img-holder {
      background: #eef2f7;
      border-bottom: 2px solid var(--border-dark);
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
    }

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

    .media-card:hover .media-img-holder img {
      transform: scale(1.03);
    }

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

    .banner-trio-box {
      background: #fff;
      border: 2px solid var(--border-dark);
      border-radius: var(--border-radius);
      padding: 20px;
      box-shadow: var(--shadow-solid);
      display: flex;
      flex-direction: column;
      gap: 16px;
      margin-top: 30px;
    }

    .banner-trio-inner {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
    }

    .banner-trio-inner .ai-page-image {
      border: 2px solid var(--border-dark);
      border-radius: 8px;
      box-shadow: var(--shadow-solid-sm);
    }

    .comment-card {
      background: #fff;
      border: 2px solid var(--border-dark);
      border-radius: var(--border-radius);
      padding: 24px;
      box-shadow: var(--shadow-solid);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

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

    .avatar-badge {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      border: 2px solid var(--border-dark);
      background: var(--color-accent-cyan);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      box-shadow: var(--shadow-solid-sm);
    }

    .user-info h4 {
      font-size: 1rem;
      font-weight: 800;
      color: var(--border-dark);
    }

    .user-info p {
      font-size: 0.8rem;
      color: var(--color-muted);
      font-weight: 600;
    }

    .comment-text {
      font-size: 0.92rem;
      color: var(--color-ink);
      line-height: 1.6;
      margin-bottom: 14px;
      background: #faf8f2;
      border: 1px dashed var(--border-dark);
      padding: 12px;
      border-radius: 8px;
    }

    .comment-stars {
      color: #ff9800;
      font-size: 0.9rem;
      font-weight: 800;
    }

    .faq-accordion {
      max-width: 920px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .faq-item {
      background: #fff;
      border: 2px solid var(--border-dark);
      border-radius: var(--border-radius);
      box-shadow: var(--shadow-solid);
      overflow: hidden;
      transition: all 0.2s ease;
    }

    .faq-question {
      padding: 20px 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-weight: 800;
      font-size: 1.05rem;
      background: #fff;
      user-select: none;
    }

    .faq-question:hover {
      background: #fffbe8;
    }

    .faq-icon {
      width: 28px;
      height: 28px;
      border: 2px solid var(--border-dark);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1rem;
      background: var(--color-accent-yellow);
      transition: transform 0.25s ease;
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
      background: #faf9f5;
      border-top: 1px dashed var(--border-dark);
      padding: 0 24px;
    }

    .faq-item.active .faq-answer {
      max-height: 500px;
      padding: 18px 24px;
      transition: max-height 0.35s ease-in-out;
    }

    .faq-answer p {
      font-size: 0.95rem;
      color: var(--color-muted);
      line-height: 1.65;
    }

    .form-wrapper {
      max-width: 780px;
      margin: 0 auto;
      background: #fff;
      border: 3px solid var(--border-dark);
      border-radius: var(--border-radius);
      box-shadow: var(--shadow-solid-lg);
      padding: 36px;
    }

    .form-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 18px;
      margin-bottom: 20px;
    }

    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
      text-align: left;
    }

    .form-group.full-width {
      grid-column: span 2;
    }

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

    .form-control {
      width: 100%;
      border: 2px solid var(--border-dark);
      border-radius: 8px;
      padding: 12px 14px;
      font-size: 0.95rem;
      background: #fafbfc;
      outline: none;
      font-family: inherit;
      transition: all 0.2s ease;
    }

    .form-control:focus {
      background: #fff;
      border-color: var(--color-accent-blue);
      box-shadow: 2px 2px 0 var(--border-dark);
    }

    textarea.form-control {
      resize: vertical;
      min-height: 110px;
    }

    .contact-card-box {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
      margin-top: 36px;
    }

    .contact-info-panel {
      background: #fff;
      border: 2px solid var(--border-dark);
      border-radius: var(--border-radius);
      padding: 28px;
      box-shadow: var(--shadow-solid);
    }

    .qr-container {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      text-align: center;
      background: #fffde6;
      border: 2px dashed var(--border-dark);
      border-radius: 12px;
      padding: 20px;
    }

    .qr-container img {
      width: 150px;
      height: 150px;
      border: 2px solid var(--border-dark);
      border-radius: 8px;
      box-shadow: var(--shadow-solid-sm);
      margin-bottom: 10px;
    }

    .articles-container {
      background: #fff;
      border: 2px solid var(--border-dark);
      border-radius: var(--border-radius);
      padding: 24px;
      box-shadow: var(--shadow-solid);
    }

    .article-links-box {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 14px;
    }

    .article-btn-link {
      background: #f4f6fa;
      border: 2px solid var(--border-dark);
      border-radius: 6px;
      padding: 6px 14px;
      font-size: 0.85rem;
      font-weight: 700;
      box-shadow: var(--shadow-solid-sm);
      transition: all 0.2s ease;
    }

    .article-btn-link:hover {
      background: var(--color-accent-cyan);
      transform: translateY(-2px);
    }

    .links-footer-group {
      background: #fff;
      border: 2px solid var(--border-dark);
      border-radius: var(--border-radius);
      padding: 20px 24px;
      box-shadow: var(--shadow-solid);
      margin-top: 30px;
    }

    .links-title {
      font-size: 1rem;
      font-weight: 900;
      margin-bottom: 12px;
      color: var(--border-dark);
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .friend-links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }

    .friend-links-wrap a {
      background: #fbfbfd;
      border: 1.5px solid var(--border-dark);
      border-radius: 6px;
      padding: 5px 12px;
      font-size: 0.85rem;
      font-weight: 700;
      transition: all 0.15s ease;
    }

    .friend-links-wrap a:hover {
      background: var(--color-accent-yellow);
      transform: translateY(-2px);
      box-shadow: var(--shadow-solid-sm);
    }

    .footer-site {
      background: #f4efe4;
      border-top: 3px solid var(--border-dark);
      padding: 44px 0 24px 0;
      color: var(--color-ink);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 32px;
      margin-bottom: 30px;
    }

    .footer-col h5 {
      font-size: 1.05rem;
      font-weight: 900;
      margin-bottom: 14px;
      color: var(--border-dark);
    }

    .footer-col p {
      font-size: 0.88rem;
      color: var(--color-muted);
      margin-bottom: 8px;
    }

    .footer-links-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .footer-links-list a {
      font-size: 0.88rem;
      font-weight: 700;
      color: var(--color-muted);
      transition: color 0.2s ease;
    }

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

    .footer-bottom {
      border-top: 2px dashed var(--border-dark);
      padding-top: 20px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 14px;
      font-size: 0.85rem;
      color: var(--color-muted);
      font-weight: 600;
    }

    .floating-widget {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .widget-btn {
      width: 48px;
      height: 48px;
      background: #fff;
      border: 2px solid var(--border-dark);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.1rem;
      box-shadow: var(--shadow-solid);
      cursor: pointer;
      transition: all 0.2s ease;
    }

    .widget-btn:hover {
      transform: scale(1.1);
      background: var(--color-accent-yellow);
    }

    .widget-btn.btn-top {
      background: var(--color-accent-cyan);
    }

    @media (max-width: 992px) {
      .grid-3 { grid-template-columns: repeat(2, 1fr); }
      .grid-4 { grid-template-columns: repeat(2, 1fr); }
      .process-timeline { grid-template-columns: repeat(2, 1fr); }
      .hero-metrics-grid { grid-template-columns: repeat(2, 1fr); }
      .media-showcase-grid { grid-template-columns: 1fr; }
      .banner-trio-inner { grid-template-columns: 1fr; }
      .contact-card-box { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 76px;
        left: 0;
        width: 100%;
        background: #fff;
        border-bottom: 3px solid var(--border-dark);
        flex-direction: column;
        align-items: flex-start;
        padding: 16px 20px;
        gap: 0;
        box-shadow: 0 10px 0 rgba(30, 30, 36, 0.08);
      }

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

      .nav-links li {
        width: 100%;
      }

      .nav-links li a {
        display: block;
        padding: 10px 0;
        width: 100%;
        border-bottom: 1px dashed #e2e5eb;
      }

      .mobile-menu-btn {
        display: block;
      }

      .hero-h1 {
        font-size: 2rem;
      }

      .grid-3, .grid-2, .grid-4 {
        grid-template-columns: 1fr;
      }

      .process-timeline {
        grid-template-columns: 1fr;
      }

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

      .form-group.full-width {
        grid-column: span 1;
      }

      .form-wrapper {
        padding: 20px;
      }

      .score-summary-bar {
        flex-direction: column;
        align-items: flex-start;
      }
    }