:root {
      --primary: #ff4e7e;
      --primary-gradient: linear-gradient(135deg, #ff4e7e 0%, #ff8b49 50%, #ffa502 100%);
      --candy-blue: #2ed8a7;
      --candy-purple: #7d5fff;
      --candy-yellow: #fffa65;
      --candy-pink-light: #fff0f5;
      --candy-blue-light: #eefbf7;
      --candy-purple-light: #f3f0ff;
      --bg-main: #faf9ff;
      --bg-card: #ffffff;
      --text-main: #1e272e;
      --text-muted: #576574;
      --text-light: #8395a7;
      --border-color: #f1eef8;
      --shadow-sm: 0 4px 12px rgba(255, 78, 126, 0.08);
      --shadow-md: 0 10px 25px rgba(125, 95, 255, 0.12);
      --shadow-lg: 0 18px 40px rgba(255, 78, 126, 0.16);
      --radius-sm: 12px;
      --radius-md: 18px;
      --radius-lg: 28px;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.6;
      background-image: 
        radial-gradient(circle at 10% 15%, rgba(255, 78, 126, 0.05) 0%, transparent 40%),
        radial-gradient(circle at 90% 40%, rgba(125, 95, 255, 0.05) 0%, transparent 40%),
        radial-gradient(circle at 50% 80%, rgba(46, 216, 167, 0.05) 0%, transparent 40%);
      background-attachment: fixed;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
      width: 100%;
    }

    header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(241, 238, 248, 0.8);
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.02);
    }

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

    .brand-area {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
    }

    .ai-page-logo {
      height: 42px;
      width: auto;
      display: block;
    }

    .brand-title {
      font-size: 1.4rem;
      font-weight: 800;
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      letter-spacing: -0.5px;
    }

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

    .nav-links li a {
      text-decoration: none;
      color: var(--text-main);
      font-weight: 600;
      font-size: 0.95rem;
      padding: 8px 12px;
      border-radius: 8px;
      transition: all 0.25s ease;
      display: inline-block;
    }

    .nav-links li a:hover {
      color: var(--primary);
      background-color: var(--candy-pink-light);
    }

    .nav-cta-btn {
      background: var(--primary-gradient);
      color: #fff !important;
      padding: 9px 20px !important;
      border-radius: 50px !important;
      font-weight: 700 !important;
      box-shadow: 0 4px 15px rgba(255, 78, 126, 0.3);
      transition: transform 0.2s, box-shadow 0.2s !important;
    }

    .nav-cta-btn:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(255, 78, 126, 0.45);
      background-color: transparent !important;
    }

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

    section {
      padding: 70px 0;
      position: relative;
    }

    .section-header {
      text-align: center;
      margin-bottom: 50px;
    }

    .section-tag {
      display: inline-block;
      padding: 6px 16px;
      background: var(--candy-purple-light);
      color: var(--candy-purple);
      border-radius: 50px;
      font-size: 0.85rem;
      font-weight: 700;
      margin-bottom: 12px;
      text-transform: uppercase;
      letter-spacing: 1px;
    }

    .section-title {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 14px;
      line-height: 1.3;
    }

    .section-desc {
      color: var(--text-muted);
      font-size: 1.05rem;
      max-width: 680px;
      margin: 0 auto;
    }

    .hero-section {
      padding: 90px 0 60px 0;
      text-align: center;
    }

    .hero-h1 {
      font-size: 2.8rem;
      font-weight: 900;
      line-height: 1.25;
      margin-bottom: 24px;
      color: var(--text-main);
    }

    .hero-h1 span {
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-lead {
      font-size: 1.2rem;
      color: var(--text-muted);
      max-width: 760px;
      margin: 0 auto 36px auto;
    }

    .hero-btn-group {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }

    .btn-main {
      padding: 14px 34px;
      border-radius: 50px;
      font-size: 1.05rem;
      font-weight: 700;
      text-decoration: none;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: all 0.25s ease;
      cursor: pointer;
      border: none;
    }

    .btn-primary {
      background: var(--primary-gradient);
      color: #fff;
      box-shadow: 0 8px 25px rgba(255, 78, 126, 0.35);
    }

    .btn-primary:hover {
      transform: translateY(-3px);
      box-shadow: 0 12px 30px rgba(255, 78, 126, 0.45);
    }

    .btn-secondary {
      background: #ffffff;
      color: var(--text-main);
      border: 2px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .btn-secondary:hover {
      border-color: var(--candy-purple);
      color: var(--candy-purple);
      transform: translateY(-3px);
    }

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

    .metric-card {
      background: var(--bg-card);
      padding: 24px 20px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-color);
      transition: transform 0.25s;
    }

    .metric-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
    }

    .metric-val {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--candy-purple);
      margin-bottom: 6px;
    }

    .metric-title {
      font-size: 0.95rem;
      color: var(--text-muted);
      font-weight: 600;
    }

    .tag-cloud-wrapper {
      background: #ffffff;
      border-radius: var(--radius-lg);
      padding: 30px;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-color);
      text-align: center;
    }

    .tag-cloud-title {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 20px;
      color: var(--text-main);
    }

    .tag-list {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
    }

    .tag-item {
      padding: 6px 16px;
      border-radius: 30px;
      font-size: 0.85rem;
      font-weight: 600;
      background: var(--bg-main);
      color: var(--text-main);
      border: 1px solid var(--border-color);
      transition: all 0.2s;
    }

    .tag-item:hover {
      background: var(--candy-pink-light);
      color: var(--primary);
      border-color: var(--primary);
    }

    .cards-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
      gap: 24px;
    }

    .candy-card {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      padding: 30px 24px;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-color);
      transition: all 0.3s cubic-bezier(0.165, 0.84, 0.44, 1);
      display: flex;
      flex-direction: column;
      height: 100%;
    }

    .candy-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-md);
      border-color: rgba(255, 78, 126, 0.3);
    }

    .card-icon-box {
      width: 52px;
      height: 52px;
      border-radius: 14px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 18px;
      font-size: 1.4rem;
      font-weight: bold;
    }

    .card-icon-pink { background: var(--candy-pink-light); color: var(--primary); }
    .card-icon-purple { background: var(--candy-purple-light); color: var(--candy-purple); }
    .card-icon-green { background: var(--candy-blue-light); color: var(--candy-blue); }
    .card-icon-yellow { background: #fffbe6; color: #f59e0b; }

    .candy-card h3 {
      font-size: 1.2rem;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }

    .candy-card p {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

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

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

    .media-img-wrap {
      width: 100%;
      aspect-ratio: 16 / 10;
      overflow: hidden;
      background: var(--bg-main);
    }

    .media-img-wrap.square {
      aspect-ratio: 1 / 1;
    }

    .media-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: transform 0.3s ease;
    }

    .media-card:hover .media-img-wrap img {
      transform: scale(1.04);
    }

    .media-card-body {
      padding: 22px;
    }

    .media-card-body h3 {
      font-size: 1.15rem;
      margin-bottom: 8px;
      font-weight: 700;
    }

    .media-card-body p {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

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

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

    .step-num {
      width: 38px;
      height: 38px;
      border-radius: 50%;
      background: var(--primary-gradient);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1.1rem;
      margin-bottom: 16px;
    }

    .step-box h3 {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .step-box p {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    .table-container {
      background: var(--bg-card);
      border-radius: var(--radius-lg);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-color);
      overflow-x: auto;
    }

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

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

    .custom-table th {
      background-color: var(--candy-pink-light);
      color: var(--primary);
      font-weight: 700;
      font-size: 1rem;
    }

    .custom-table tr:hover td {
      background-color: #faf9ff;
    }

    .custom-table td {
      color: var(--text-muted);
      font-size: 0.95rem;
    }

    .highlight-cell {
      font-weight: 700;
      color: var(--candy-purple) !important;
    }

    .score-badge-box {
      background: linear-gradient(135deg, #fff0f5 0%, #f3f0ff 100%);
      border: 2px dashed var(--primary);
      border-radius: var(--radius-md);
      padding: 24px;
      margin-bottom: 30px;
      display: flex;
      justify-content: space-around;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      text-align: center;
    }

    .score-item strong {
      display: block;
      font-size: 2rem;
      color: var(--primary);
      font-weight: 900;
    }

    .score-item span {
      font-size: 0.95rem;
      color: var(--text-muted);
      font-weight: 600;
    }

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

    .comment-card {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      padding: 26px;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-color);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .comment-card p {
      font-size: 0.95rem;
      color: var(--text-main);
      font-style: italic;
      margin-bottom: 20px;
      line-height: 1.7;
    }

    .commenter-meta {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .commenter-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--candy-purple-light);
      color: var(--candy-purple);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1rem;
    }

    .commenter-info h4 {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .commenter-info span {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    .faq-accordion {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      background: var(--bg-card);
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      overflow: hidden;
      transition: all 0.25s;
    }

    .faq-question {
      padding: 18px 24px;
      font-weight: 700;
      font-size: 1.05rem;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #fff;
    }

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

    .faq-icon {
      font-size: 1.2rem;
      transition: transform 0.3s;
    }

    .faq-answer {
      padding: 0 24px;
      max-height: 0;
      overflow: hidden;
      transition: all 0.3s ease-out;
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.6;
      background: #faf9ff;
    }

    .faq-item.active .faq-answer {
      padding: 18px 24px 22px 24px;
      max-height: 250px;
      border-top: 1px solid var(--border-color);
    }

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

    .form-wrapper {
      background: var(--bg-card);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border-color);
      max-width: 800px;
      margin: 0 auto;
    }

    .form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }

    .form-group {
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

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

    .form-group label {
      font-weight: 600;
      font-size: 0.9rem;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border-radius: 10px;
      border: 1px solid var(--border-color);
      background: #fdfcff;
      font-size: 0.95rem;
      color: var(--text-main);
      outline: none;
      transition: border-color 0.2s;
    }

    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(255, 78, 126, 0.15);
    }

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

    .articles-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
      gap: 16px;
      margin-top: 24px;
    }

    .article-item-card {
      background: #fff;
      padding: 18px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      text-decoration: none;
      color: var(--text-main);
      display: block;
      transition: all 0.2s;
    }

    .article-item-card:hover {
      border-color: var(--candy-purple);
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
    }

    .article-item-card h4 {
      font-size: 0.95rem;
      margin-bottom: 8px;
      font-weight: 700;
      color: var(--text-main);
    }

    .article-item-card span {
      font-size: 0.8rem;
      color: var(--primary);
      font-weight: 600;
    }

    .qr-contact-box {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 30px;
      background: #fff;
      padding: 30px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-color);
      margin-top: 30px;
      flex-wrap: wrap;
    }

    .qr-img-wrap {
      width: 130px;
      height: 130px;
      border-radius: 12px;
      overflow: hidden;
      border: 1px solid var(--border-color);
    }

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

    .contact-info-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
      font-size: 0.95rem;
      color: var(--text-muted);
    }

    .contact-info-list strong {
      color: var(--text-main);
    }

    footer {
      background-color: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 50px 0 30px 0;
      color: var(--text-muted);
    }

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

    .footer-col h3 {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 16px;
      color: var(--text-main);
    }

    .footer-col p {
      font-size: 0.9rem;
      line-height: 1.6;
      margin-bottom: 14px;
    }

    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      list-style: none;
    }

    .friend-links a {
      color: var(--text-muted);
      text-decoration: none;
      font-size: 0.85rem;
      background: var(--bg-main);
      padding: 4px 10px;
      border-radius: 6px;
      transition: all 0.2s;
    }

    .friend-links a:hover {
      color: var(--primary);
      background: var(--candy-pink-light);
    }

    .footer-bottom {
      border-top: 1px solid var(--border-color);
      padding-top: 24px;
      text-align: center;
      font-size: 0.85rem;
      color: var(--text-light);
    }

    .floating-kefu {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      background: var(--bg-card);
      border-radius: 50px;
      padding: 10px 18px;
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
      display: flex;
      align-items: center;
      gap: 8px;
      text-decoration: none;
      color: var(--text-main);
      font-weight: 700;
      font-size: 0.9rem;
      transition: transform 0.2s;
    }

    .floating-kefu:hover {
      transform: scale(1.05);
    }

    .pulse-dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: var(--candy-blue);
      animation: pulse 1.5s infinite;
    }

    @keyframes pulse {
      0% { box-shadow: 0 0 0 0 rgba(46, 216, 167, 0.7); }
      70% { box-shadow: 0 0 0 8px rgba(46, 216, 167, 0); }
      100% { box-shadow: 0 0 0 0 rgba(46, 216, 167, 0); }
    }

    @media (max-width: 992px) {
      .hero-metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .media-card-grid {
        grid-template-columns: 1fr;
      }
      .timeline-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .comments-grid {
        grid-template-columns: 1fr;
      }
      .footer-top {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .mobile-menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 76px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.05);
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links li {
        width: 100%;
        text-align: center;
        margin-bottom: 8px;
      }
      .nav-links li a {
        display: block;
        padding: 10px;
      }
      .hero-h1 {
        font-size: 2.1rem;
      }
      .form-grid {
        grid-template-columns: 1fr;
      }
      .form-group.full-width {
        grid-column: span 1;
      }
      .timeline-steps {
        grid-template-columns: 1fr;
      }
      .hero-metrics-grid {
        grid-template-columns: 1fr;
      }
    }