:root {
      --bg-base: #faf8f5;
      --bg-card: #ffffff;
      --text-main: #1e1b18;
      --text-muted: #5c554e;
      --color-primary: #ff5722;
      --color-primary-hover: #f4511e;
      --color-yellow: #ffb703;
      --color-mint: #06d6a0;
      --color-blue: #118ab2;
      --color-purple: #7b2cbf;
      --border-dark: #2b2725;
      --shadow-pop: 4px 4px 0px #2b2725;
      --shadow-hover: 6px 6px 0px #2b2725;
      --radius-base: 14px;
      --container-width: 1200px;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-base);
      color: var(--text-main);
      line-height: 1.6;
      background-image: radial-gradient(#dfd7cc 1.2px, transparent 1.2px);
      background-size: 24px 24px;
      overflow-x: hidden;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    .app-container {
      width: 100%;
      max-width: var(--container-width);
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background-color: rgba(250, 248, 245, 0.95);
      backdrop-filter: blur(8px);
      border-bottom: 2px solid var(--border-dark);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .brand-wrap .ai-page-logo {
      height: 42px;
      width: auto;
      display: block;
    }
    .brand-text {
      font-weight: 900;
      font-size: 1.25rem;
      letter-spacing: -0.5px;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .brand-badge {
      background: var(--color-yellow);
      border: 1.5px solid var(--border-dark);
      padding: 2px 6px;
      font-size: 0.7rem;
      border-radius: 6px;
      font-weight: 800;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }
    .nav-links li {
      margin: 0;
      padding: 0;
    }
    .nav-links a {
      font-size: 0.95rem;
      font-weight: 700;
      padding: 8px 14px;
      border-radius: 8px;
      transition: all 0.2s ease;
      display: inline-block;
    }
    .nav-links a:hover {
      background: #ffe3d8;
      color: var(--color-primary);
    }
    .header-action {
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .btn-pop {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 20px;
      background: var(--color-primary);
      color: #ffffff;
      font-weight: 800;
      border: 2px solid var(--border-dark);
      border-radius: 10px;
      box-shadow: 3px 3px 0 var(--border-dark);
      cursor: pointer;
      transition: all 0.15s ease;
    }
    .btn-pop:hover {
      transform: translate(-1px, -1px);
      box-shadow: 4px 4px 0 var(--border-dark);
      background: var(--color-primary-hover);
    }
    .btn-pop:active {
      transform: translate(2px, 2px);
      box-shadow: 0 0 0 var(--border-dark);
    }
    .btn-pop.secondary {
      background: #ffffff;
      color: var(--text-main);
    }
    .mobile-menu-btn {
      display: none;
      background: transparent;
      border: 2px solid var(--border-dark);
      padding: 6px 10px;
      font-size: 1.2rem;
      border-radius: 8px;
      cursor: pointer;
    }
    .section-wrap {
      padding: 70px 0;
      position: relative;
    }
    .section-head {
      text-align: center;
      max-width: 800px;
      margin: 0 auto 40px auto;
    }
    .section-tag {
      display: inline-block;
      background: var(--color-mint);
      border: 2px solid var(--border-dark);
      box-shadow: 2px 2px 0 var(--border-dark);
      font-size: 0.85rem;
      font-weight: 800;
      padding: 4px 12px;
      border-radius: 30px;
      margin-bottom: 12px;
      text-transform: uppercase;
    }
    .section-title {
      font-size: 2.2rem;
      font-weight: 900;
      letter-spacing: -0.5px;
      margin-bottom: 12px;
      color: var(--text-main);
    }
    .section-desc {
      color: var(--text-muted);
      font-size: 1.05rem;
    }
    .hero-section {
      padding: 80px 0 60px 0;
    }
    .hero-box {
      border: 3px solid var(--border-dark);
      background: var(--bg-card);
      border-radius: 20px;
      padding: 50px 40px;
      box-shadow: 8px 8px 0 var(--border-dark);
      position: relative;
      overflow: hidden;
    }
    .hero-doodle-stripe {
      display: flex;
      gap: 12px;
      margin-bottom: 20px;
      flex-wrap: wrap;
    }
    .doodle-badge {
      font-size: 0.85rem;
      font-weight: 800;
      padding: 6px 14px;
      border-radius: 8px;
      border: 2px solid var(--border-dark);
      box-shadow: 2px 2px 0 var(--border-dark);
    }
    .doodle-badge.yellow { background: var(--color-yellow); }
    .doodle-badge.purple { background: #e0aaff; color: #3c096c; }
    .doodle-badge.blue { background: #a2d2ff; color: #003049; }
    .hero-h1 {
      font-size: 2.7rem;
      font-weight: 900;
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -1px;
    }
    .hero-h1 span {
      background: linear-gradient(180deg, transparent 65%, var(--color-yellow) 65%);
      display: inline-block;
      padding: 0 4px;
    }
    .hero-lead {
      font-size: 1.2rem;
      color: var(--text-muted);
      margin-bottom: 35px;
      max-width: 900px;
    }
    .hero-cta-bar {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 16px;
      margin-bottom: 40px;
    }
    .hero-meta-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      border-top: 2px dashed #dcd5cc;
      padding-top: 30px;
    }
    .hero-meta-item {
      padding: 14px;
      border-radius: 12px;
      background: #fffbf2;
      border: 2px solid var(--border-dark);
      box-shadow: 3px 3px 0 var(--border-dark);
    }
    .hero-meta-num {
      font-size: 1.8rem;
      font-weight: 900;
      color: var(--color-primary);
      display: block;
      line-height: 1;
      margin-bottom: 4px;
    }
    .hero-meta-label {
      font-size: 0.85rem;
      color: var(--text-muted);
      font-weight: 700;
    }
    .card-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .doodle-card {
      background: var(--bg-card);
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-base);
      padding: 24px;
      box-shadow: var(--shadow-pop);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: all 0.2s ease;
    }
    .doodle-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .card-head {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 14px;
    }
    .card-icon-pill {
      font-size: 1.2rem;
      background: #fdf0ed;
      border: 1.5px solid var(--border-dark);
      border-radius: 8px;
      padding: 4px 10px;
      font-weight: 900;
    }
    .card-label-tag {
      font-size: 0.75rem;
      font-weight: 800;
      padding: 3px 8px;
      border-radius: 6px;
      border: 1px solid var(--border-dark);
      background: #e9ecef;
    }
    .card-title {
      font-size: 1.25rem;
      font-weight: 800;
      margin-bottom: 8px;
    }
    .card-text {
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.55;
      margin-bottom: 16px;
    }
    .card-footer {
      border-top: 1.5px dashed #eae5de;
      padding-top: 12px;
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--color-blue);
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 24px;
      justify-content: center;
    }
    .cloud-tag {
      padding: 6px 14px;
      background: #ffffff;
      border: 2px solid var(--border-dark);
      border-radius: 20px;
      font-size: 0.85rem;
      font-weight: 800;
      box-shadow: 2px 2px 0 var(--border-dark);
      transition: all 0.15s ease;
    }
    .cloud-tag:hover {
      background: var(--color-yellow);
      transform: scale(1.05);
    }
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .step-card {
      background: #ffffff;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-base);
      padding: 24px 20px;
      box-shadow: var(--shadow-pop);
      position: relative;
    }
    .step-badge {
      width: 36px;
      height: 36px;
      background: var(--color-yellow);
      border: 2px solid var(--border-dark);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      font-size: 1.1rem;
      margin-bottom: 14px;
    }
    .step-title {
      font-size: 1.15rem;
      font-weight: 800;
      margin-bottom: 8px;
    }
    .step-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
    }
    .review-score-banner {
      background: #fff8e7;
      border: 2.5px solid var(--border-dark);
      border-radius: var(--radius-base);
      padding: 24px;
      margin-bottom: 24px;
      box-shadow: var(--shadow-pop);
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
    }
    .score-left h3 {
      font-size: 1.4rem;
      font-weight: 900;
      margin-bottom: 4px;
    }
    .score-stars {
      color: #ff9800;
      font-size: 1.2rem;
      margin-right: 8px;
    }
    .score-points {
      display: flex;
      align-items: baseline;
      gap: 6px;
    }
    .score-big {
      font-size: 2.8rem;
      font-weight: 900;
      color: var(--color-primary);
      line-height: 1;
    }
    .table-container {
      background: #ffffff;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-base);
      box-shadow: var(--shadow-pop);
      overflow-x: auto;
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }
    .compare-table th, .compare-table td {
      padding: 16px 20px;
      border-bottom: 1.5px solid #ece8e1;
      font-size: 0.95rem;
    }
    .compare-table th {
      background: #fff3e6;
      font-weight: 900;
      color: var(--text-main);
      border-bottom: 2px solid var(--border-dark);
    }
    .compare-table tr:hover td {
      background: #fffdfa;
    }
    .pill-win {
      background: #d8f3dc;
      color: #1b4332;
      padding: 4px 8px;
      border-radius: 6px;
      font-weight: 800;
      font-size: 0.8rem;
      border: 1px solid #74c69d;
    }
    .pill-loss {
      background: #f8f9fa;
      color: #6c757d;
      padding: 4px 8px;
      border-radius: 6px;
      font-weight: 700;
      font-size: 0.8rem;
    }
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .testi-card {
      background: #ffffff;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-base);
      padding: 24px;
      box-shadow: var(--shadow-pop);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .testi-quote {
      font-size: 0.95rem;
      color: var(--text-main);
      line-height: 1.6;
      margin-bottom: 16px;
      position: relative;
    }
    .testi-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1.5px dashed #ebe5dc;
      padding-top: 14px;
    }
    .author-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      border: 2px solid var(--border-dark);
      background: var(--color-yellow);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      font-size: 1.1rem;
    }
    .author-info h4 {
      font-size: 0.95rem;
      font-weight: 800;
    }
    .author-info p {
      font-size: 0.8rem;
      color: var(--text-muted);
    }
    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 14px;
      max-width: 900px;
      margin: 0 auto;
    }
    .faq-item {
      background: #ffffff;
      border: 2px solid var(--border-dark);
      border-radius: 12px;
      box-shadow: var(--shadow-pop);
      overflow: hidden;
      transition: all 0.2s ease;
    }
    .faq-trigger {
      width: 100%;
      text-align: left;
      padding: 18px 24px;
      background: transparent;
      border: none;
      font-size: 1.05rem;
      font-weight: 800;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      color: var(--text-main);
    }
    .faq-trigger:hover {
      background: #fffdf5;
    }
    .faq-icon {
      font-size: 1.2rem;
      font-weight: 900;
      transition: transform 0.2s ease;
    }
    .faq-content {
      padding: 0 24px;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.25s ease, padding 0.25s ease;
      background: #fafaf8;
      border-top: 1.5px dashed #eee8df;
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.6;
    }
    .faq-item.active .faq-content {
      padding: 16px 24px;
      max-height: 300px;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }
    .media-gallery-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
    }
    .media-card {
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-base);
      overflow: hidden;
      background: #ffffff;
      box-shadow: var(--shadow-pop);
    }
    .media-card .img-box {
      width: 100%;
      aspect-ratio: 16 / 9;
      background: #eee8df;
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .media-card .img-box.square {
      aspect-ratio: 1 / 1;
      max-height: 340px;
    }
    .media-card img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }
    .media-info {
      padding: 18px;
    }
    .media-info h4 {
      font-size: 1.15rem;
      font-weight: 800;
      margin-bottom: 6px;
    }
    .media-info p {
      font-size: 0.9rem;
      color: var(--text-muted);
    }
    .form-panel {
      background: #ffffff;
      border: 2.5px solid var(--border-dark);
      border-radius: 20px;
      box-shadow: var(--shadow-pop);
      padding: 40px;
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 40px;
    }
    .form-info h3 {
      font-size: 1.8rem;
      font-weight: 900;
      margin-bottom: 12px;
    }
    .form-info p {
      color: var(--text-muted);
      margin-bottom: 24px;
      font-size: 0.95rem;
    }
    .form-contact-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
      font-size: 0.95rem;
      font-weight: 700;
    }
    .form-contact-list span {
      color: var(--color-primary);
    }
    .form-box form {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .form-field {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }
    .form-field label {
      font-size: 0.9rem;
      font-weight: 800;
    }
    .form-field input, .form-field select, .form-field textarea {
      width: 100%;
      padding: 12px 16px;
      border: 2px solid var(--border-dark);
      border-radius: 8px;
      background: #fdfdfc;
      font-family: inherit;
      font-size: 0.95rem;
      outline: none;
      transition: all 0.2s;
    }
    .form-field input:focus, .form-field select:focus, .form-field textarea:focus {
      border-color: var(--color-primary);
      background: #ffffff;
      box-shadow: 2px 2px 0 var(--border-dark);
    }
    .article-links-wrap {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
      margin-top: 24px;
    }
    .article-link-card {
      background: #ffffff;
      border: 2px solid var(--border-dark);
      border-radius: 10px;
      padding: 16px;
      box-shadow: var(--shadow-pop);
      display: flex;
      align-items: center;
      justify-content: space-between;
      transition: all 0.2s ease;
    }
    .article-link-card:hover {
      transform: translateX(4px);
      background: #fffef8;
    }
    .article-link-card span {
      font-weight: 800;
      font-size: 0.95rem;
    }
    .site-footer {
      background: #ffffff;
      border-top: 3px solid var(--border-dark);
      padding: 60px 0 30px 0;
      margin-top: 40px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 30px;
      margin-bottom: 40px;
    }
    .footer-brand h4 {
      font-size: 1.3rem;
      font-weight: 900;
      margin-bottom: 12px;
    }
    .footer-brand p {
      color: var(--text-muted);
      font-size: 0.9rem;
      max-width: 320px;
      margin-bottom: 16px;
    }
    .qr-card {
      display: inline-block;
      border: 2px solid var(--border-dark);
      padding: 8px;
      border-radius: 8px;
      background: #faf8f5;
      text-align: center;
    }
    .qr-card img {
      width: 100px;
      height: 100px;
      display: block;
      margin: 0 auto 6px auto;
    }
    .qr-card span {
      font-size: 0.75rem;
      font-weight: 800;
    }
    .footer-col h5 {
      font-size: 1rem;
      font-weight: 900;
      margin-bottom: 16px;
      border-bottom: 2px solid var(--color-yellow);
      display: inline-block;
      padding-bottom: 2px;
    }
    .footer-col ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .footer-col a {
      color: var(--text-muted);
      font-size: 0.9rem;
      font-weight: 600;
      transition: color 0.2s;
    }
    .footer-col a:hover {
      color: var(--color-primary);
    }
    .footer-bottom {
      border-top: 1.5px dashed #ded8cf;
      padding-top: 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 14px;
      font-size: 0.85rem;
      color: var(--text-muted);
    }
    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      align-items: center;
    }
    .friend-links a {
      color: var(--text-muted);
      font-weight: 700;
    }
    .friend-links a:hover {
      color: var(--color-primary);
    }
    .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: 2px solid var(--border-dark);
      box-shadow: 3px 3px 0 var(--border-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      font-weight: 900;
      font-size: 1.1rem;
      transition: all 0.2s ease;
    }
    .float-btn:hover {
      transform: translateY(-2px);
      background: var(--color-yellow);
    }
    .float-qr-popup {
      position: absolute;
      right: 58px;
      bottom: 0;
      background: #ffffff;
      border: 2px solid var(--border-dark);
      box-shadow: var(--shadow-pop);
      padding: 12px;
      border-radius: 12px;
      display: none;
      width: 140px;
      text-align: center;
    }
    .float-qr-popup img {
      width: 100%;
      height: auto;
      display: block;
      margin-bottom: 6px;
    }
    .float-qr-popup span {
      font-size: 0.75rem;
      font-weight: 800;
      color: var(--text-main);
    }
    .float-kefu:hover .float-qr-popup {
      display: block;
    }
    @media (max-width: 992px) {
      .card-grid { grid-template-columns: repeat(2, 1fr); }
      .steps-grid { grid-template-columns: repeat(2, 1fr); }
      .testimonials-grid { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: repeat(2, 1fr); }
      .form-panel { grid-template-columns: 1fr; }
      .hero-h1 { font-size: 2.2rem; }
      .hero-meta-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        border-bottom: 2px solid var(--border-dark);
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.08);
      }
      .nav-links.show {
        display: flex;
      }
      .mobile-menu-btn { display: block; }
      .card-grid { grid-template-columns: 1fr; }
      .steps-grid { grid-template-columns: 1fr; }
      .testimonials-grid { grid-template-columns: 1fr; }
      .media-gallery-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
      .article-links-wrap { grid-template-columns: 1fr; }
      .hero-h1 { font-size: 1.8rem; }
      .hero-box { padding: 30px 20px; }
      .form-panel { padding: 24px 16px; }
    }