/* CSS Reset & Variables */
    :root {
      --bg-base: #f8fafc;
      --bg-card: rgba(255, 255, 255, 0.85);
      --text-main: #0f172a;
      --text-muted: #475569;
      --border-color: rgba(226, 232, 240, 0.8);
      --holo-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #ec4899 100%);
      --holo-soft: linear-gradient(135deg, #e0e7ff 0%, #f3e8ff 50%, #fce7f3 100%);
      --holo-btn-hover: linear-gradient(135deg, #4f46e5 0%, #9333ea 50%, #db2777 100%);
      --primary-color: #4f46e5;
      --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
      --shadow-lg: 0 10px 25px -5px rgba(99, 102, 241, 0.12), 0 8px 10px -6px rgba(168, 85, 247, 0.08);
      --radius-lg: 16px;
      --radius-md: 10px;
    }

    * {
      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;
      color: var(--text-main);
      background-color: var(--bg-base);
    }

    body {
      line-height: 1.6;
      background: radial-gradient(circle at 10% 20%, rgba(224, 231, 255, 0.5) 0%, rgba(243, 232, 255, 0.4) 40%, rgba(252, 231, 243, 0.3) 90%),
                  linear-gradient(180deg, #f8fafc 0%, #f1f5f9 100%);
      background-attachment: fixed;
      overflow-x: hidden;
    }

    a {
      color: var(--primary-color);
      text-decoration: none;
      transition: all 0.2s ease;
    }

    a:hover {
      opacity: 0.85;
    }

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

    /* Header & Navigation */
    .header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.88);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .nav-wrapper {
      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;
      object-fit: contain;
    }

    .brand-title {
      font-size: 20px;
      font-weight: 800;
      background: var(--holo-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    /* REQUIRED CSS RULE */
    .nav-links {
      gap: 0;
      display: flex;
      align-items: center;
      list-style: none;
    }

    .nav-links li {
      margin: 0;
      padding: 0;
    }

    .nav-links a {
      display: inline-block;
      padding: 8px 14px;
      font-size: 14px;
      font-weight: 500;
      color: var(--text-main);
      border-radius: 6px;
      transition: background 0.2s;
    }

    .nav-links a:hover {
      background: rgba(99, 102, 241, 0.08);
      color: var(--primary-color);
    }

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

    .btn-holo {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 14px;
      font-weight: 600;
      color: #ffffff !important;
      background: var(--holo-gradient);
      border: none;
      border-radius: 30px;
      box-shadow: 0 4px 15px rgba(168, 85, 247, 0.3);
      cursor: pointer;
      transition: transform 0.2s, box-shadow 0.2s;
    }

    .btn-holo:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(168, 85, 247, 0.45);
      background: var(--holo-btn-hover);
    }

    .btn-outline {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 9px 20px;
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
      background: #ffffff;
      border: 1px solid #cbd5e1;
      border-radius: 30px;
      cursor: pointer;
      transition: all 0.2s ease;
    }

    .btn-outline:hover {
      border-color: var(--primary-color);
      color: var(--primary-color);
    }

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

    /* Hero Section - STRICTLY NO IMAGES */
    .hero-section {
      padding: 90px 0 60px;
      text-align: center;
      position: relative;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      border-radius: 20px;
      background: rgba(99, 102, 241, 0.1);
      border: 1px solid rgba(99, 102, 241, 0.2);
      font-size: 13px;
      font-weight: 600;
      color: var(--primary-color);
      margin-bottom: 24px;
    }

    .hero-title {
      font-size: 42px;
      font-weight: 900;
      line-height: 1.25;
      margin-bottom: 20px;
      color: #0f172a;
      letter-spacing: -0.5px;
    }

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

    .hero-desc {
      max-width: 820px;
      margin: 0 auto 32px;
      font-size: 18px;
      color: var(--text-muted);
      line-height: 1.7;
    }

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

    /* Indicators Grid */
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 40px;
    }

    .metric-card {
      background: var(--bg-card);
      backdrop-filter: blur(10px);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 24px 20px;
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s, box-shadow 0.25s;
    }

    .metric-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: rgba(168, 85, 247, 0.3);
    }

    .metric-num {
      font-size: 32px;
      font-weight: 800;
      background: var(--holo-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      margin-bottom: 4px;
    }

    .metric-label {
      font-size: 14px;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* Common Section Formatting */
    .section {
      padding: 80px 0;
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 50px;
    }

    .section-tag {
      display: inline-block;
      font-size: 12px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: var(--primary-color);
      background: rgba(99, 102, 241, 0.08);
      padding: 4px 12px;
      border-radius: 12px;
      margin-bottom: 12px;
    }

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

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

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

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

    .feature-card {
      background: var(--bg-card);
      backdrop-filter: blur(12px);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
      height: 100%;
    }

    .feature-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-lg);
      border-color: rgba(168, 85, 247, 0.4);
    }

    .feature-icon {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: var(--holo-soft);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      margin-bottom: 20px;
    }

    .feature-title {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }

    .feature-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    /* Tag Cloud for Models */
    .model-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 30px;
      justify-content: center;
    }

    .model-tag {
      background: #ffffff;
      border: 1px solid rgba(203, 213, 225, 0.8);
      padding: 8px 16px;
      border-radius: 20px;
      font-size: 13px;
      font-weight: 600;
      color: var(--text-main);
      box-shadow: var(--shadow-sm);
      transition: all 0.2s;
    }

    .model-tag:hover {
      border-color: var(--primary-color);
      color: var(--primary-color);
      transform: scale(1.04);
    }

    /* Comparison Table Section */
    .comp-table-wrapper {
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-lg);
      overflow-x: auto;
    }

    .comp-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 700px;
    }

    .comp-table th, .comp-table td {
      padding: 18px 24px;
      border-bottom: 1px solid #f1f5f9;
      font-size: 14px;
    }

    .comp-table th {
      background: #f8fafc;
      font-weight: 700;
      color: var(--text-main);
    }

    .comp-highlight {
      background: rgba(99, 102, 241, 0.04);
      font-weight: 600;
      color: var(--primary-color);
    }

    .badge-rating {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: #fef3c7;
      color: #92400e;
      padding: 6px 14px;
      border-radius: 20px;
      font-weight: 700;
      font-size: 14px;
    }

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

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

    .step-num {
      font-size: 36px;
      font-weight: 900;
      color: rgba(99, 102, 241, 0.2);
      position: absolute;
      top: 16px;
      right: 20px;
    }

    /* Showcase Case Cards */
    .case-card {
      background: #ffffff;
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s;
    }

    .case-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
    }

    .case-img-holder {
      width: 100%;
      height: 200px;
      overflow: hidden;
      background: #e2e8f0;
    }

    .case-img-holder img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .case-content {
      padding: 20px;
    }

    /* Token Price Cards */
    .price-card {
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      padding: 30px 24px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      position: relative;
    }

    .price-card.popular {
      border: 2px solid var(--primary-color);
      box-shadow: var(--shadow-lg);
    }

    .price-card.popular::before {
      content: '最受欢迎';
      position: absolute;
      top: -14px;
      left: 50%;
      transform: translateX(-50%);
      background: var(--holo-gradient);
      color: #fff;
      font-size: 12px;
      font-weight: 700;
      padding: 2px 14px;
      border-radius: 12px;
    }

    .price-val {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      margin: 16px 0;
    }

    /* FAQ Accordion */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

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

    .faq-question {
      width: 100%;
      padding: 20px 24px;
      text-align: left;
      background: none;
      border: none;
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }

    .faq-answer {
      padding: 0 24px 20px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      display: none;
    }

    .faq-item.active .faq-answer {
      display: block;
    }

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

    /* Reviews Section */
    .review-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 24px;
      box-shadow: var(--shadow-sm);
    }

    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }

    .avatar-placeholder {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--holo-soft);
      color: var(--primary-color);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
    }

    .user-info h4 {
      font-size: 15px;
      font-weight: 700;
    }

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

    /* Form Section */
    .form-wrapper {
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      padding: 40px;
      box-shadow: var(--shadow-lg);
      max-width: 800px;
      margin: 0 auto;
    }

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

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

    .form-group.full {
      grid-column: 1 / -1;
    }

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

    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid #cbd5e1;
      border-radius: 8px;
      font-size: 14px;
      outline: none;
      transition: border 0.2s;
    }

    .form-input:focus, .form-select:focus, .form-textarea:focus {
      border-color: var(--primary-color);
      box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
    }

    /* Article List Component */
    .article-list {
      list-style: none;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }

    .article-item a {
      display: block;
      padding: 16px 20px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      color: var(--text-main);
      font-weight: 600;
      box-shadow: var(--shadow-sm);
    }

    .article-item a:hover {
      border-color: var(--primary-color);
      color: var(--primary-color);
    }

    /* Footer Safety Color System */
    .footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 70px 0 30px;
      margin-top: 80px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 50px;
    }

    .footer-col h3 {
      color: #ffffff;
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 20px;
    }

    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-links a {
      color: #94a3b8;
      font-size: 14px;
    }

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

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

    .friend-links a {
      color: #cbd5e1;
      font-size: 13px;
      background: rgba(255, 255, 255, 0.05);
      padding: 6px 12px;
      border-radius: 6px;
    }

    .friend-links a:hover {
      background: rgba(255, 255, 255, 0.15);
      color: #fff;
    }

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 25px;
      text-align: center;
      font-size: 13px;
      color: #64748b;
    }

    /* Floating Widget */
    .float-widget {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .float-btn {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background: var(--holo-gradient);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
      cursor: pointer;
      position: relative;
    }

    .qr-popover {
      position: absolute;
      right: 60px;
      bottom: 0;
      background: #ffffff;
      padding: 12px;
      border-radius: 12px;
      box-shadow: var(--shadow-lg);
      display: none;
      width: 160px;
      text-align: center;
    }

    .qr-popover img {
      width: 100%;
      height: auto;
      border-radius: 6px;
    }

    .qr-popover p {
      font-size: 12px;
      color: var(--text-main);
      margin-top: 6px;
      font-weight: 600;
    }

    .float-btn:hover .qr-popover {
      display: block;
    }

    /* Responsive Queries */
    @media (max-width: 992px) {
      .grid-4, .metrics-grid, .steps-wrapper {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3 {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .nav-links {
        display: none;
      }
      .mobile-menu-btn {
        display: block;
      }
      .nav-links.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        padding: 20px;
        box-shadow: var(--shadow-lg);
        border-bottom: 1px solid var(--border-color);
      }
    }

    @media (max-width: 640px) {
      .hero-title {
        font-size: 28px;
      }
      .metrics-grid, .steps-wrapper, .grid-4 {
        grid-template-columns: 1fr;
      }
      .form-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .article-list {
        grid-template-columns: 1fr;
      }
    }