/* CSS Standard Reset & Colors (Vibrant Warm Red Accent Style) */
    :root {
      --primary-color: #d9232d;
      --primary-hover: #b81922;
      --primary-light: #fff0f1;
      --secondary-color: #1f2429;
      --text-main: #2b3037;
      --text-muted: #5f6874;
      --bg-main: #fcfcfd;
      --bg-card: #ffffff;
      --bg-alt: #f7f8fa;
      --border-color: #eaecef;
      --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
      --shadow-md: 0 6px 20px rgba(217, 35, 45, 0.08);
      --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.1);
      --radius: 8px;
      --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    }

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

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.6;
    }

    body {
      width: 100%;
      overflow-x: hidden;
    }

    a {
      color: var(--primary-color);
      text-decoration: none;
      transition: var(--transition);
    }

    a:hover {
      color: var(--primary-hover);
    }

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

    /* Typography */
    h1, h2, h3, h4, h5, h6 {
      color: var(--secondary-color);
      font-weight: 700;
      line-height: 1.3;
    }

    .section-title {
      font-size: 2.2rem;
      text-align: center;
      margin-bottom: 12px;
      position: relative;
    }

    .section-title::after {
      content: '';
      display: block;
      width: 50px;
      height: 3px;
      background: var(--primary-color);
      margin: 10px auto 0;
      border-radius: 2px;
    }

    .section-subtitle {
      text-align: center;
      color: var(--text-muted);
      font-size: 1.05rem;
      margin-bottom: 48px;
    }

    /* Header & Navigation */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

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

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

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

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

    .nav-links li a {
      padding: 8px 12px;
      font-size: 0.92rem;
      font-weight: 500;
      color: var(--text-main);
      white-space: nowrap;
      border-radius: 4px;
    }

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

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: 6px;
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      text-decoration: none;
    }

    .btn-primary {
      background-color: var(--primary-color);
      color: #ffffff !important;
      box-shadow: 0 4px 12px rgba(217, 35, 45, 0.3);
    }

    .btn-primary:hover {
      background-color: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 6px 16px rgba(217, 35, 45, 0.4);
    }

    .btn-outline {
      background: transparent;
      border-color: var(--primary-color);
      color: var(--primary-color) !important;
    }

    .btn-outline:hover {
      background-color: var(--primary-light);
      transform: translateY(-2px);
    }

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

    /* Hero Section (STRICTLY NO IMAGES) */
    .hero-section {
      background: linear-gradient(135deg, #fff5f5 0%, #ffffff 50%, #fff0f0 100%);
      padding: 80px 0 60px;
      position: relative;
      border-bottom: 1px solid var(--border-color);
    }

    .hero-wrapper {
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      max-width: 900px;
      margin: 0 auto;
    }

    .hero-tag {
      display: inline-block;
      padding: 6px 16px;
      background-color: var(--primary-light);
      color: var(--primary-color);
      font-size: 0.88rem;
      font-weight: 600;
      border-radius: 20px;
      margin-bottom: 20px;
      border: 1px solid rgba(217, 35, 45, 0.15);
    }

    .hero-title {
      font-size: 2.8rem;
      color: var(--secondary-color);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-title span {
      color: var(--primary-color);
    }

    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-muted);
      margin-bottom: 36px;
      line-height: 1.7;
    }

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

    .hero-stats {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      width: 100%;
      margin-top: 20px;
    }

    .stat-card {
      background: var(--bg-card);
      padding: 20px;
      border-radius: var(--radius);
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-color);
      text-align: center;
      transition: var(--transition);
    }

    .stat-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: rgba(217, 35, 45, 0.3);
    }

    .stat-num {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--primary-color);
      margin-bottom: 4px;
    }

    .stat-label {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* Section Layout Standard */
    .page-section {
      padding: 80px 0;
      border-bottom: 1px solid var(--border-color);
    }

    .section-alt {
      background-color: var(--bg-alt);
    }

    /* Grid Layouts */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
      align-items: center;
    }

    /* Card Component */
    .card {
      background: var(--bg-card);
      border-radius: var(--radius);
      padding: 28px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }

    .card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
      border-color: rgba(217, 35, 45, 0.2);
    }

    .card-icon {
      width: 48px;
      height: 48px;
      border-radius: 8px;
      background: var(--primary-light);
      color: var(--primary-color);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      font-weight: bold;
      margin-bottom: 16px;
    }

    .card-title {
      font-size: 1.25rem;
      margin-bottom: 12px;
      color: var(--secondary-color);
    }

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

    /* Media Wrapper for Images */
    .media-box {
      width: 100%;
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-color);
      background: var(--bg-card);
    }

    .media-box img {
      width: 100%;
      height: auto;
      display: block;
      transition: var(--transition);
    }

    .media-box:hover img {
      transform: scale(1.02);
    }

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

    .step-item {
      background: var(--bg-card);
      padding: 24px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      text-align: center;
      position: relative;
    }

    .step-number {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--primary-color);
      color: #fff;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 16px;
    }

    /* Comparison Table */
    .comparison-box {
      background: var(--bg-card);
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      overflow-x: auto;
    }

    .rating-badge {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      background: var(--primary-light);
      padding: 20px;
      border-radius: var(--radius);
      margin-bottom: 28px;
      border: 1px solid rgba(217, 35, 45, 0.2);
    }

    .rating-stars {
      color: #f59e0b;
      font-size: 1.3rem;
      font-weight: bold;
    }

    .rating-score {
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--primary-color);
    }

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

    table.comp-table th, table.comp-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.95rem;
    }

    table.comp-table th {
      background: var(--bg-alt);
      color: var(--secondary-color);
      font-weight: 700;
    }

    table.comp-table tr:hover {
      background-color: rgba(217, 35, 45, 0.02);
    }

    .highlight-col {
      color: var(--primary-color);
      font-weight: 700;
    }

    /* FAQ Accordion */
    .faq-container {
      max-width: 900px;
      margin: 0 auto;
    }

    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      margin-bottom: 12px;
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-header {
      padding: 20px 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-weight: 600;
      font-size: 1.05rem;
      color: var(--secondary-color);
    }

    .faq-header:hover {
      color: var(--primary-color);
      background-color: var(--primary-light);
    }

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

    .faq-content {
      padding: 0 24px;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.7;
    }

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

    .faq-item.active .faq-icon {
      transform: rotate(180deg);
    }

    /* Testimonials / Reviews */
    .review-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-top: 16px;
      padding-top: 16px;
      border-top: 1px solid var(--border-color);
    }

    .avatar-placeholder {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--primary-color);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
    }

    .user-info .user-name {
      font-weight: 600;
      font-size: 0.95rem;
      color: var(--secondary-color);
    }

    .user-info .user-role {
      font-size: 0.82rem;
      color: var(--text-muted);
    }

    /* Form Section */
    .form-box {
      background: var(--bg-card);
      border-radius: var(--radius);
      padding: 36px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
    }

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

    .form-group label {
      display: block;
      font-weight: 600;
      margin-bottom: 8px;
      color: var(--secondary-color);
      font-size: 0.95rem;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: 6px;
      font-size: 0.95rem;
      transition: var(--transition);
      background-color: var(--bg-main);
      color: var(--text-main);
    }

    .form-control:focus {
      outline: none;
      border-color: var(--primary-color);
      box-shadow: 0 0 0 3px rgba(217, 35, 45, 0.1);
    }

    textarea.form-control {
      resize: vertical;
      min-height: 120px;
    }

    /* Footer & Extra Information */
    .site-footer {
      background: #15191d;
      color: #e2e8f0;
      padding: 60px 0 30px;
      border-top: 3px solid var(--primary-color);
    }

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

    .footer-col h4 {
      color: #ffffff;
      font-size: 1.1rem;
      margin-bottom: 20px;
      position: relative;
    }

    .footer-col p {
      color: #a0aec0;
      font-size: 0.9rem;
      line-height: 1.7;
    }

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

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

    .footer-links li a {
      color: #cbd5e0;
      font-size: 0.9rem;
    }

    .footer-links li a:hover {
      color: #ffffff;
      padding-left: 4px;
    }

    .qr-box {
      text-align: center;
      background: #1f2429;
      padding: 16px;
      border-radius: 8px;
      border: 1px solid #2d3748;
    }

    .qr-box img {
      width: 120px;
      height: 120px;
      display: block;
      margin: 0 auto 8px;
      border-radius: 4px;
    }

    .qr-box p {
      font-size: 0.82rem;
      color: #cbd5e0;
    }

    .footer-bottom {
      border-top: 1px solid #2d3748;
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.88rem;
      color: #a0aec0;
    }

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

    .friend-links a {
      color: #cbd5e0;
    }

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

    /* Floating Customer Service Element */
    .float-kefu {
      position: fixed;
      right: 24px;
      bottom: 24px;
      z-index: 999;
      background: var(--bg-card);
      border-radius: 50px;
      padding: 8px 16px;
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
      display: flex;
      align-items: center;
      gap: 10px;
      cursor: pointer;
      transition: var(--transition);
    }

    .float-kefu:hover {
      transform: translateY(-4px);
      box-shadow: 0 16px 36px rgba(217, 35, 45, 0.2);
    }

    .float-kefu-icon {
      width: 36px;
      height: 36px;
      background: var(--primary-color);
      color: #fff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
    }

    .float-kefu-text {
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--secondary-color);
    }

    /* Responsive Adjustments */
    @media (max-width: 992px) {
      .hero-title { font-size: 2.2rem; }
      .grid-4, .step-list { grid-template-columns: repeat(2, 1fr); }
      .grid-3 { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }

    @media (max-width: 768px) {
      .menu-toggle { display: block; }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        align-items: flex-start;
        padding: 20px;
        box-shadow: var(--shadow-md);
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.show { display: flex; }
      .nav-links li { width: 100%; }
      .nav-links li a { display: block; padding: 12px 16px; }
      .hero-stats { grid-template-columns: repeat(2, 1fr); }
      .grid-2, .grid-3, .grid-4, .step-list { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
      .footer-bottom { flex-direction: column; text-align: center; }
      .hero-buttons { flex-direction: column; width: 100%; }
      .btn { width: 100%; }
    }