/* CSS Reset & General Rules */
    *, *::before, *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: #f8f9fe;
      color: #0f172a;
      line-height: 1.6;
    }
    body {
      overflow-x: hidden;
      background-color: #f8f9fe;
      color: #1e293b;
    }
    
    /* Dynamic Theme Colors (高饱和艳彩风) */
    :root {
      --primary: #4f46e5;
      --primary-hover: #4338ca;
      --secondary: #ec4899;
      --accent-cyan: #06b6d4;
      --accent-amber: #f59e0b;
      --accent-green: #10b981;
      --text-dark: #0f172a;
      --text-muted: #475569;
      --bg-light: #f8f9fe;
      --card-bg: #ffffff;
      --border-color: #e2e8f0;
      --gradient-vibrant: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #ec4899 100%);
      --gradient-badge: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
      --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
      --shadow-md: 0 10px 15px -3px rgba(99, 102, 241, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
      --shadow-hover: 0 20px 25px -5px rgba(99, 102, 241, 0.2), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    }

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

    /* Typography */
    h1, h2, h3, h4, h5, h6 {
      color: var(--text-dark);
      font-weight: 700;
      line-height: 1.3;
    }
    a {
      color: var(--primary);
      text-decoration: none;
      transition: all 0.25s ease;
    }
    a:hover {
      color: var(--secondary);
    }

    /* Section Styling */
    .section {
      padding: 80px 0;
      position: relative;
    }
    .section-title-wrap {
      text-align: center;
      margin-bottom: 50px;
    }
    .section-badge {
      display: inline-block;
      padding: 6px 16px;
      background: rgba(99, 102, 241, 0.1);
      color: var(--primary);
      border-radius: 50px;
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 12px;
      border: 1px solid rgba(99, 102, 241, 0.2);
    }
    .section-title {
      font-size: 32px;
      color: var(--text-dark);
      margin-bottom: 15px;
    }
    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      max-width: 700px;
      margin: 0 auto;
    }

    /* Buttons */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 28px;
      border-radius: 12px;
      font-size: 16px;
      font-weight: 600;
      cursor: pointer;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      border: none;
      outline: none;
      text-decoration: none;
    }
    .btn-primary {
      background: var(--gradient-vibrant);
      color: #ffffff;
      box-shadow: 0 4px 15px rgba(99, 102, 241, 0.35);
    }
    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 25px rgba(236, 72, 153, 0.45);
      color: #ffffff;
    }
    .btn-outline {
      background: #ffffff;
      color: var(--text-dark);
      border: 2px solid #e2e8f0;
      box-shadow: var(--shadow-sm);
    }
    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
      transform: translateY(-2px);
    }

    /* Header & Navigation */
    .header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(226, 232, 240, 0.8);
      box-shadow: var(--shadow-sm);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
    }
    .brand-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .brand-wrap img {
      max-height: 42px;
      width: auto;
    }
    .brand-name {
      font-size: 22px;
      font-weight: 800;
      background: var(--gradient-vibrant);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    /* Specific CSS constraint requirement */
    .nav-links {
      gap: 0;
      display: flex;
      align-items: center;
      list-style: none;
    }
    .nav-links li a {
      padding: 8px 14px;
      font-size: 15px;
      font-weight: 500;
      color: var(--text-dark);
      border-radius: 8px;
    }
    .nav-links li a:hover {
      color: var(--primary);
      background: rgba(99, 102, 241, 0.06);
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      cursor: pointer;
      color: var(--text-dark);
    }

    /* HERO SECTION - NO IMAGES ALLOWED */
    .hero-section {
      padding: 90px 0 70px;
      background: radial-gradient(circle at 10% 20%, rgba(99, 102, 241, 0.08) 0%, rgba(236, 72, 153, 0.05) 50%, rgba(248, 249, 254, 1) 100%);
      text-align: center;
      position: relative;
    }
    .hero-pill {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      border-radius: 30px;
      background: #ffffff;
      border: 1px solid rgba(99, 102, 241, 0.3);
      box-shadow: var(--shadow-sm);
      font-size: 14px;
      font-weight: 600;
      color: var(--primary);
      margin-bottom: 24px;
    }
    .hero-pill span {
      background: var(--gradient-vibrant);
      color: #fff;
      padding: 2px 8px;
      border-radius: 12px;
      font-size: 12px;
    }
    .hero-title {
      font-size: 40px;
      font-weight: 900;
      color: #0f172a;
      letter-spacing: -0.5px;
      margin-bottom: 20px;
      max-width: 950px;
      margin-left: auto;
      margin-right: auto;
    }
    .hero-subtitle {
      font-size: 18px;
      color: var(--text-muted);
      max-width: 780px;
      margin: 0 auto 36px;
      line-height: 1.7;
    }
    .hero-cta-group {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      margin-bottom: 50px;
      flex-wrap: wrap;
    }
    .hero-cta-official {
      background: var(--gradient-vibrant);
      color: #ffffff !important;
      padding: 16px 36px;
      font-size: 18px;
      border-radius: 14px;
      font-weight: 700;
      box-shadow: 0 10px 30px rgba(99, 102, 241, 0.4);
      display: inline-flex;
      align-items: center;
      gap: 10px;
    }
    .hero-cta-official:hover {
      transform: translateY(-3px) scale(1.02);
      box-shadow: 0 15px 35px rgba(236, 72, 153, 0.5);
    }
    .hero-feature-tags {
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 12px;
      max-width: 900px;
      margin: 0 auto;
    }
    .tag-item {
      background: #ffffff;
      padding: 8px 16px;
      border-radius: 10px;
      border: 1px solid #e2e8f0;
      font-size: 14px;
      color: var(--text-dark);
      font-weight: 500;
      box-shadow: var(--shadow-sm);
    }

    /* Metrics Grid */
    .metrics-bar {
      margin-top: -30px;
      z-index: 10;
      position: relative;
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      background: #ffffff;
      padding: 30px;
      border-radius: 20px;
      box-shadow: var(--shadow-md);
      border: 1px solid rgba(99, 102, 241, 0.15);
    }
    .metric-card {
      text-align: center;
      padding: 10px;
    }
    .metric-num {
      font-size: 32px;
      font-weight: 800;
      background: var(--gradient-vibrant);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      margin-bottom: 4px;
    }
    .metric-label {
      font-size: 14px;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* Cards Grid Layouts */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 30px;
    }

    /* Dynamic Feature Card */
    .feature-card {
      background: var(--card-bg);
      border-radius: 16px;
      padding: 28px;
      border: 1px solid #e2e8f0;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      position: relative;
      overflow: hidden;
    }
    .feature-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(99, 102, 241, 0.4);
    }
    .feature-icon {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: rgba(99, 102, 241, 0.1);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 20px;
      margin-bottom: 18px;
    }
    .feature-card h3 {
      font-size: 19px;
      margin-bottom: 10px;
    }
    .feature-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Models Cloud / List */
    .model-pills-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 25px;
    }
    .model-pill {
      background: #ffffff;
      border: 1px solid rgba(99, 102, 241, 0.2);
      padding: 8px 18px;
      border-radius: 30px;
      font-size: 14px;
      font-weight: 600;
      color: var(--text-dark);
      box-shadow: var(--shadow-sm);
      transition: all 0.2s;
    }
    .model-pill:hover {
      background: var(--gradient-vibrant);
      color: #ffffff;
      border-color: transparent;
    }

    /* Comparison Rating Section */
    .rating-box {
      background: linear-gradient(135deg, #ffffff 0%, #f1f5f9 100%);
      border: 2px solid rgba(99, 102, 241, 0.3);
      border-radius: 20px;
      padding: 40px;
      box-shadow: var(--shadow-md);
      margin-bottom: 40px;
      text-align: center;
    }
    .score-badge {
      display: inline-flex;
      align-items: center;
      gap: 15px;
      background: #ffffff;
      padding: 12px 30px;
      border-radius: 50px;
      box-shadow: var(--shadow-sm);
      margin-bottom: 20px;
    }
    .stars {
      color: #f59e0b;
      font-size: 24px;
      letter-spacing: 2px;
    }
    .score-val {
      font-size: 28px;
      font-weight: 900;
      color: var(--primary);
    }
    .comp-table {
      width: 100%;
      border-collapse: collapse;
      background: #ffffff;
      border-radius: 14px;
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .comp-table th, .comp-table td {
      padding: 16px 20px;
      text-align: left;
      border-bottom: 1px solid #e2e8f0;
      font-size: 15px;
    }
    .comp-table th {
      background: #f8fafc;
      font-weight: 700;
      color: var(--text-dark);
    }
    .comp-table tr:hover {
      background: rgba(99, 102, 241, 0.02);
    }
    .highlight-col {
      background: rgba(99, 102, 241, 0.05);
      font-weight: 600;
      color: var(--primary);
    }

    /* Token Price Table */
    .token-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
    .token-card {
      background: #ffffff;
      border-radius: 16px;
      padding: 24px;
      border: 1px solid #e2e8f0;
      box-shadow: var(--shadow-sm);
      text-align: center;
    }
    .token-price {
      font-size: 26px;
      font-weight: 800;
      color: var(--secondary);
      margin: 10px 0;
    }

    /* Reviews Section */
    .review-card {
      background: #ffffff;
      border-radius: 16px;
      padding: 24px;
      border: 1px solid #e2e8f0;
      box-shadow: var(--shadow-sm);
    }
    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 15px;
    }
    .avatar-placeholder {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--gradient-badge);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
    }
    .user-info h4 {
      font-size: 16px;
    }
    .user-info p {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* Process Timeline */
    .step-card {
      text-align: center;
      padding: 24px;
      background: #ffffff;
      border-radius: 16px;
      border: 1px solid #e2e8f0;
      position: relative;
    }
    .step-num {
      width: 36px;
      height: 36px;
      background: var(--gradient-vibrant);
      color: #fff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 15px;
      font-weight: 700;
    }

    /* Contact & Form Section */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      background: #ffffff;
      border-radius: 20px;
      padding: 40px;
      border: 1px solid #e2e8f0;
      box-shadow: var(--shadow-md);
    }
    .form-group {
      margin-bottom: 18px;
    }
    .form-group label {
      display: block;
      margin-bottom: 6px;
      font-weight: 600;
      font-size: 14px;
    }
    .form-control {
      width: 100%;
      padding: 12px 16px;
      border-radius: 10px;
      border: 1px solid #cbd5e1;
      font-size: 15px;
      outline: none;
      transition: all 0.2s;
    }
    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
    }
    textarea.form-control {
      resize: vertical;
      min-height: 100px;
    }

    /* FAQ Accordion */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .faq-item {
      background: #ffffff;
      border-radius: 12px;
      border: 1px solid #e2e8f0;
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .faq-question {
      padding: 18px 24px;
      font-weight: 700;
      font-size: 16px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .faq-answer {
      padding: 0 24px 18px;
      color: var(--text-muted);
      font-size: 15px;
      display: none;
      line-height: 1.7;
    }
    .faq-item.active .faq-answer {
      display: block;
    }
    .faq-item.active .faq-question {
      color: var(--primary);
    }

    /* Images Container & Responsive Wrappers */
    .media-card {
      background: #ffffff;
      border-radius: 16px;
      overflow: hidden;
      border: 1px solid #e2e8f0;
      box-shadow: var(--shadow-sm);
    }
    .media-card img {
      width: 100%;
      height: auto;
      display: block;
      object-fit: cover;
    }
    .media-card-content {
      padding: 20px;
    }

    /* Footer */
    .footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 60px 0 30px;
      font-size: 14px;
      border-top: 1px solid #1e293b;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-brand h3 {
      color: #ffffff;
      font-size: 20px;
      margin-bottom: 12px;
    }
    .footer-links h4, .footer-contact h4 {
      color: #ffffff;
      font-size: 16px;
      margin-bottom: 16px;
    }
    .footer-links ul {
      list-style: none;
    }
    .footer-links ul li {
      margin-bottom: 8px;
    }
    .footer-links ul li a {
      color: #94a3b8;
    }
    .footer-links ul li a:hover {
      color: #ffffff;
    }
    .friend-links-box {
      border-top: 1px solid #1e293b;
      padding-top: 25px;
      margin-top: 25px;
    }
    .friend-links-box h5 {
      color: #cbd5e1;
      margin-bottom: 10px;
    }
    .friend-links-flex {
      display: flex;
      flex-wrap: wrap;
      gap: 15px;
    }
    .friend-links-flex a {
      color: #64748b;
      font-size: 13px;
    }
    .friend-links-flex a:hover {
      color: #38bdf8;
    }
    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 20px;
      text-align: center;
      color: #64748b;
    }

    /* Float Service & Back to Top */
    .float-kefu {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      background: #ffffff;
      padding: 10px;
      border-radius: 16px;
      box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
      border: 1px solid #e2e8f0;
      text-align: center;
      width: 130px;
    }
    .float-kefu img {
      width: 100px;
      height: 100px;
      border-radius: 8px;
    }
    .float-kefu p {
      font-size: 12px;
      font-weight: 700;
      color: var(--text-dark);
      margin-top: 6px;
    }

    /* Mobile Responsive Rules */
    @media (max-width: 992px) {
      .grid-3, .grid-4, .token-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .contact-wrapper {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .hero-title {
        font-size: 30px;
      }
    }
    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 76px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid #e2e8f0;
        box-shadow: var(--shadow-md);
      }
      .nav-links.active {
        display: flex;
      }
      .mobile-menu-btn {
        display: block;
      }
      .grid-2, .grid-3, .grid-4, .token-grid, .metrics-grid {
        grid-template-columns: 1fr;
      }
      .hero-cta-group {
        flex-direction: column;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .float-kefu {
        display: none; /* Hide on mobile to avoid screen overlap */
      }
    }