:root {
      --primary: #FF5E7E;
      --primary-hover: #FF3B62;
      --secondary: #6C5CE7;
      --accent-cyan: #00CEC9;
      --accent-yellow: #FFAA00;
      --accent-mint: #00B894;
      --bg-base: #F8FAFF;
      --bg-surface: #FFFFFF;
      --bg-subtle: #F0F4FD;
      --text-main: #1E2238;
      --text-muted: #57607C;
      --text-light: #8A94A6;
      --border-color: #E2E8F5;
      --border-candy: #FFD2DC;
      --shadow-sm: 0 4px 12px rgba(108, 92, 231, 0.06);
      --shadow-md: 0 10px 25px rgba(108, 92, 231, 0.1);
      --shadow-lg: 0 18px 40px rgba(255, 94, 126, 0.12);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --radius-full: 9999px;
      --container-max: 1200px;
    }

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

    html {
      scroll-behavior: smooth;
      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;
    }

    body {
      background: radial-gradient(circle at 10% 10%, #FFF0F5 0%, #F8FAFF 40%),
                  radial-gradient(circle at 90% 90%, #EBF4FF 0%, #F8FAFF 50%);
      background-attachment: fixed;
      min-height: 100vh;
      display: flex;
      flex-direction: column;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.25s ease;
    }

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

    /* Top Navbar */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      transition: all 0.3s ease;
    }

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

    .nav-brand {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 20px;
      font-weight: 800;
      color: var(--text-main);
    }

    .ai-page-logo {
      height: 40px;
      width: auto;
      display: block;
    }

    .brand-highlight {
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

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

    .nav-links li a {
      padding: 8px 14px;
      font-size: 15px;
      font-weight: 600;
      color: var(--text-muted);
      border-radius: var(--radius-full);
      display: inline-block;
    }

    .nav-links li a:hover {
      color: var(--primary);
      background: #FFF0F4;
    }

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

    .btn-candy {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 10px 22px;
      font-size: 14px;
      font-weight: 700;
      border-radius: var(--radius-full);
      cursor: pointer;
      border: none;
      transition: all 0.25s ease;
      text-align: center;
    }

    .btn-candy-primary {
      background: linear-gradient(135deg, #FF6584, #FF3D71);
      color: #FFFFFF !important;
      box-shadow: 0 6px 18px rgba(255, 61, 113, 0.3);
    }

    .btn-candy-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(255, 61, 113, 0.4);
    }

    .btn-candy-secondary {
      background: linear-gradient(135deg, #6C5CE7, #8E44AD);
      color: #FFFFFF !important;
      box-shadow: 0 6px 18px rgba(108, 92, 231, 0.25);
    }

    .btn-candy-secondary:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 22px rgba(108, 92, 231, 0.35);
    }

    .btn-candy-outline {
      background: #FFFFFF;
      border: 1.5px solid var(--border-color);
      color: var(--text-main);
    }

    .btn-candy-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: #FFF5F7;
    }

    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      cursor: pointer;
      color: var(--text-main);
    }

    /* Section Global Styles */
    section {
      padding: 70px 0;
      position: relative;
    }

    .section-header {
      text-align: center;
      max-width: 780px;
      margin: 0 auto 48px auto;
    }

    .badge-pill {
      display: inline-block;
      padding: 6px 16px;
      border-radius: var(--radius-full);
      font-size: 13px;
      font-weight: 700;
      letter-spacing: 0.5px;
      margin-bottom: 12px;
      text-transform: uppercase;
      background: #FFEBF0;
      color: var(--primary);
      border: 1px solid #FFD0DB;
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 14px;
      line-height: 1.3;
    }

    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* Hero Section (No Images Allowed) */
    .hero-section {
      padding: 80px 0 60px 0;
      text-align: center;
      position: relative;
      overflow: hidden;
    }

    .hero-badge-wrap {
      display: flex;
      justify-content: center;
      gap: 10px;
      flex-wrap: wrap;
      margin-bottom: 20px;
    }

    .hero-badge {
      background: #FFFFFF;
      padding: 6px 18px;
      border-radius: var(--radius-full);
      font-size: 13px;
      font-weight: 700;
      color: var(--secondary);
      border: 1.5px solid #E4E0FD;
      box-shadow: var(--shadow-sm);
    }

    .hero-title {
      font-size: 44px;
      font-weight: 900;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-title-gradient {
      background: linear-gradient(135deg, #FF3D71 0%, #6C5CE7 50%, #00CEC9 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      display: inline-block;
    }

    .hero-lead {
      font-size: 18px;
      color: var(--text-muted);
      max-width: 820px;
      margin: 0 auto 34px auto;
      line-height: 1.7;
    }

    .hero-cta-group {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 50px;
    }

    .hero-cta-group .btn-candy {
      padding: 14px 34px;
      font-size: 16px;
    }

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 10px;
    }

    .stat-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px 20px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }

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

    .stat-num {
      font-size: 32px;
      font-weight: 900;
      margin-bottom: 6px;
      line-height: 1.1;
    }

    .stat-num.pink { color: #FF3D71; }
    .stat-num.purple { color: #6C5CE7; }
    .stat-num.cyan { color: #00B894; }
    .stat-num.yellow { color: #FFAA00; }

    .stat-label {
      font-size: 14px;
      font-weight: 600;
      color: var(--text-muted);
    }

    /* Model Matrix Banner */
    .models-chip-grid {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 30px;
    }

    .model-chip {
      background: #FFFFFF;
      border: 1px solid #E6EBFC;
      padding: 8px 16px;
      border-radius: var(--radius-full);
      font-size: 13px;
      font-weight: 700;
      color: var(--text-main);
      box-shadow: 0 2px 8px rgba(0,0,0,0.03);
      transition: all 0.2s ease;
    }

    .model-chip:hover {
      background: #F0F3FF;
      border-color: var(--secondary);
      color: var(--secondary);
      transform: scale(1.05);
    }

    /* Cards & Layout Utilities */
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 30px;
      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;
    }

    .candy-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 30px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
      position: relative;
      overflow: hidden;
    }

    .candy-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
      border-color: #E2DBFF;
    }

    .candy-card-icon {
      width: 52px;
      height: 52px;
      border-radius: var(--radius-md);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 24px;
      font-weight: 800;
      margin-bottom: 20px;
      flex-shrink: 0;
    }

    .icon-pink { background: #FFE6EC; color: #FF3D71; }
    .icon-purple { background: #EFEAFF; color: #6C5CE7; }
    .icon-cyan { background: #E2FAFA; color: #00CEC9; }
    .icon-yellow { background: #FFF4DB; color: #FFAA00; }
    .icon-mint { background: #DFF7EC; color: #00B894; }

    .candy-card-title {
      font-size: 20px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
      line-height: 1.4;
    }

    .candy-card-text {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.65;
      flex-grow: 1;
    }

    .candy-card-tag {
      margin-top: 18px;
      display: inline-block;
      font-size: 12px;
      font-weight: 700;
      color: var(--secondary);
      background: #F4F0FF;
      padding: 4px 10px;
      border-radius: 6px;
      align-self: flex-start;
    }

    /* Media Img Wrapper */
    .media-card-img-wrap {
      width: 100%;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      margin-bottom: 20px;
    }

    .media-card-img-wrap img {
      width: 100%;
      height: auto;
      display: block;
      transition: transform 0.4s ease;
    }

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

    /* Multi-step Process */
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .step-box {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 26px 20px;
      position: relative;
      box-shadow: var(--shadow-sm);
    }

    .step-badge {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      color: #FFFFFF;
      font-weight: 800;
      font-size: 16px;
      border-radius: var(--radius-full);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 16px;
    }

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

    .step-desc {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Comparison Table Section */
    .comparison-container {
      background: #FFFFFF;
      border: 1.5px solid #EBE4FF;
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-md);
    }

    .rating-banner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: linear-gradient(135deg, #FFF0F4 0%, #F5F0FF 100%);
      padding: 20px 28px;
      border-radius: var(--radius-md);
      margin-bottom: 30px;
      border: 1px solid #FFDDE6;
    }

    .rating-left {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .rating-star-group {
      font-size: 22px;
      color: #FFB300;
      letter-spacing: 2px;
    }

    .rating-score {
      font-size: 34px;
      font-weight: 900;
      color: #FF3D71;
    }

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

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

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

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

    .comparison-table th {
      background: #F8F9FE;
      color: var(--text-main);
      font-weight: 700;
    }

    .comparison-table td.highlight-col {
      background: #FFF9FA;
      font-weight: 700;
      color: #FF3D71;
    }

    /* Form Section */
    .form-wrapper {
      background: #FFFFFF;
      border: 1px solid var(--border-candy);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-lg);
    }

    .form-group {
      margin-bottom: 20px;
    }

    .form-label {
      display: block;
      font-size: 14px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1.5px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 14px;
      color: var(--text-main);
      outline: none;
      background: #FAFCFF;
      transition: border-color 0.2s;
    }

    .form-control:focus {
      border-color: var(--primary);
      background: #FFFFFF;
    }

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

    /* Testimonials / User Reviews */
    .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-header {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }

    .review-avatar {
      width: 46px;
      height: 46px;
      border-radius: var(--radius-full);
      background: linear-gradient(135deg, #FFB8C6, #C7B9FF);
      color: var(--text-main);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 16px;
    }

    .review-user-name {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
    }

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

    .review-content {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.65;
    }

    .review-stars {
      color: #FFB300;
      margin-top: 12px;
      font-size: 14px;
    }

    /* FAQ Accordion */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

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

    .faq-question {
      padding: 18px 24px;
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }

    .faq-question:hover {
      color: var(--primary);
    }

    .faq-icon {
      font-size: 18px;
      font-weight: 700;
      transition: transform 0.25s ease;
      color: var(--secondary);
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      padding: 0 24px;
      color: var(--text-muted);
      font-size: 14px;
      line-height: 1.7;
      background: #FCFDFF;
    }

    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 0 24px 20px 24px;
    }

    /* Articles Section */
    .article-list-wrap {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      margin-top: 24px;
    }

    .article-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px;
      box-shadow: var(--shadow-sm);
      transition: all 0.2s ease;
    }

    .article-card:hover {
      border-color: var(--primary);
      transform: translateY(-3px);
    }

    .article-title {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
      line-height: 1.4;
    }

    .article-link {
      font-size: 13px;
      color: var(--secondary);
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* Footer Section */
    .site-footer {
      background: #FFFFFF;
      border-top: 1.5px solid var(--border-color);
      padding: 60px 0 30px 0;
      margin-top: auto;
      color: var(--text-main);
    }

    .footer-top {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 40px;
    }

    .footer-col-title {
      font-size: 16px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 18px;
    }

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

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

    .footer-links-list li a {
      font-size: 14px;
      color: var(--text-muted);
    }

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

    .footer-contact-item {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 8px;
    }

    .footer-qr-block {
      display: flex;
      align-items: center;
      gap: 16px;
      margin-top: 14px;
    }

    .footer-qr-img {
      width: 90px;
      height: 90px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
      overflow: hidden;
      flex-shrink: 0;
    }

    .footer-qr-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }

    .friend-links-bar {
      border-top: 1px dashed var(--border-color);
      padding: 20px 0;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 16px;
      font-size: 13px;
      color: var(--text-muted);
    }

    .friend-links-bar a {
      color: var(--text-muted);
      padding: 4px 8px;
      background: #F4F6FC;
      border-radius: 4px;
    }

    .friend-links-bar a:hover {
      color: var(--primary);
      background: #FFEBF0;
    }

    .footer-bottom {
      border-top: 1px solid var(--border-color);
      padding-top: 24px;
      text-align: center;
      font-size: 13px;
      color: var(--text-light);
    }

    /* Float Service & Back to Top */
    .floating-tools {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 990;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-full);
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      color: var(--text-main);
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      font-size: 18px;
      transition: all 0.25s ease;
    }

    .float-btn:hover {
      background: var(--primary);
      color: #FFFFFF;
      border-color: var(--primary);
      transform: translateY(-3px);
    }

    /* Responsive Queries */
    @media (max-width: 992px) {
      .hero-title { font-size: 34px; }
      .hero-stats-grid { grid-template-columns: repeat(2, 1fr); }
      .grid-3, .article-list-wrap { grid-template-columns: repeat(2, 1fr); }
      .grid-4, .steps-grid { grid-template-columns: repeat(2, 1fr); }
      .footer-top { grid-template-columns: repeat(2, 1fr); }
      .nav-links { display: none; }
      .mobile-menu-toggle { display: block; }
      .nav-links.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #FFFFFF;
        border-bottom: 1px solid var(--border-color);
        padding: 20px;
        box-shadow: var(--shadow-md);
      }
      .nav-links.active li { width: 100%; }
      .nav-links.active li a { width: 100%; padding: 12px 16px; }
    }

    @media (max-width: 768px) {
      .hero-title { font-size: 28px; }
      .section-title { font-size: 24px; }
      .grid-2, .grid-3, .grid-4, .article-list-wrap, .steps-grid { grid-template-columns: 1fr; }
      .hero-stats-grid { grid-template-columns: 1fr; }
      .footer-top { grid-template-columns: 1fr; }
      .form-wrapper { padding: 24px; }
      .rating-banner { flex-direction: column; text-align: center; gap: 12px; }
      .rating-left { flex-direction: column; }
    }