/* ========== 艳色潮流风 Modern Vivid Fashion Theme CSS ========== */
    :root {
      --primary-color: #6366f1;
      --primary-gradient: linear-gradient(135deg, #FF2E93 0%, #FF8A00 50%, #6366f1 100%);
      --vivid-accent-1: #FF2E93;
      --vivid-accent-2: #00E5FF;
      --vivid-accent-3: #7000FF;
      --bg-main: #FAFAFC;
      --bg-card: #FFFFFF;
      --bg-secondary: #F3F4F8;
      --text-dark: #0F172A;
      --text-muted: #475569;
      --border-color: #E2E8F0;
      --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
      --shadow-md: 0 10px 25px -5px rgba(99, 102, 241, 0.12);
      --shadow-lg: 0 20px 35px -10px rgba(255, 46, 147, 0.15);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 24px;
      --container-width: 1200px;
    }

    * {
      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: var(--bg-main);
      color: var(--text-dark);
      line-height: 1.6;
    }

    body {
      overflow-x: hidden;
      background: linear-gradient(180deg, #F8FAFC 0%, #F1F5F9 50%, #FAFAFC 100%);
    }

    a {
      color: var(--primary-color);
      text-decoration: none;
      transition: all 0.3s ease;
    }

    a:hover {
      opacity: 0.85;
    }

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

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

    .section-header {
      text-align: center;
      margin-bottom: 45px;
    }

    .section-tag {
      display: inline-block;
      padding: 6px 16px;
      background: linear-gradient(90deg, rgba(255, 46, 147, 0.1), rgba(0, 229, 255, 0.1));
      color: var(--vivid-accent-1);
      font-weight: 700;
      font-size: 0.88rem;
      border-radius: 50px;
      margin-bottom: 12px;
      border: 1px solid rgba(255, 46, 147, 0.2);
    }

    .section-title {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--text-dark);
      letter-spacing: -0.5px;
    }

    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      max-width: 650px;
      margin: 10px auto 0 auto;
    }

    /* Global Nav-Links gap constraint requirement */
    .nav-links {
      gap: 0;
      display: flex;
      align-items: center;
      list-style: none;
    }

    /* Header & Navigation */
    .site-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: 0 2px 10px rgba(0,0,0,0.03);
    }

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

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

    .ai-page-logo {
      height: 42px;
      width: auto;
      object-fit: contain;
    }

    .brand-name {
      font-size: 1.35rem;
      font-weight: 900;
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      letter-spacing: -0.5px;
    }

    .nav-links li {
      position: relative;
    }

    .nav-links li a {
      display: inline-block;
      padding: 10px 14px;
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-dark);
      border-radius: 6px;
      transition: all 0.25s ease;
    }

    .nav-links li a:hover {
      color: var(--vivid-accent-1);
      background: rgba(255, 46, 147, 0.05);
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 11px 24px;
      font-size: 0.95rem;
      font-weight: 700;
      border-radius: var(--radius-md);
      cursor: pointer;
      border: none;
      transition: all 0.3s ease;
      text-decoration: none;
    }

    .btn-vivid {
      background: var(--primary-gradient);
      color: #FFFFFF !important;
      box-shadow: var(--shadow-md);
    }

    .btn-vivid:hover {
      transform: translateY(-2px);
      box-shadow: var(--shadow-lg);
      opacity: 0.95;
    }

    .btn-outline {
      background: transparent;
      color: var(--text-dark);
      border: 2px solid var(--text-dark);
    }

    .btn-outline:hover {
      background: var(--text-dark);
      color: #FFFFFF;
    }

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

    /* HERO SECTION - Pure Text/CSS No Image Allowed */
    .hero-section {
      padding: 90px 0 70px 0;
      background: radial-gradient(circle at 80% 20%, rgba(0, 229, 255, 0.12) 0%, rgba(255, 46, 147, 0.08) 40%, rgba(250, 250, 252, 1) 80%);
      text-align: center;
      overflow: hidden;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #FFFFFF;
      border: 1px solid rgba(255, 46, 147, 0.25);
      padding: 8px 20px;
      border-radius: 50px;
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--vivid-accent-1);
      box-shadow: var(--shadow-sm);
      margin-bottom: 24px;
      animation: pulseGlow 3s infinite alternate;
    }

    @keyframes pulseGlow {
      0% { box-shadow: 0 0 10px rgba(255, 46, 147, 0.1); }
      100% { box-shadow: 0 0 25px rgba(255, 46, 147, 0.3); }
    }

    .hero-h1 {
      font-size: 3.2rem;
      line-height: 1.18;
      font-weight: 900;
      color: var(--text-dark);
      letter-spacing: -1px;
      margin-bottom: 20px;
      max-width: 900px;
      margin-left: auto;
      margin-right: auto;
    }

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

    .hero-subtitle {
      font-size: 1.25rem;
      color: var(--text-muted);
      max-width: 780px;
      margin: 0 auto 35px auto;
      font-weight: 500;
    }

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

    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 20px;
      margin-top: 60px;
    }

    .metric-card {
      background: #FFFFFF;
      padding: 24px 16px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: transform 0.3s ease;
    }

    .metric-card:hover {
      transform: translateY(-5px);
      border-color: var(--vivid-accent-2);
    }

    .metric-num {
      font-size: 2.2rem;
      font-weight: 900;
      color: var(--vivid-accent-3);
    }

    .metric-label {
      font-size: 0.9rem;
      color: var(--text-muted);
      font-weight: 600;
      margin-top: 4px;
    }

    /* Grid Layouts */
    .grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 30px; }
    .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 Cards */
    .card {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      padding: 28px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      position: relative;
      overflow: hidden;
    }

    .card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: rgba(99, 102, 241, 0.4);
    }

    .card-icon {
      width: 52px;
      height: 52px;
      border-radius: 12px;
      background: linear-gradient(135deg, rgba(255, 46, 147, 0.1), rgba(0, 229, 255, 0.1));
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      margin-bottom: 18px;
      color: var(--vivid-accent-1);
    }

    .card-title {
      font-size: 1.2rem;
      font-weight: 800;
      color: var(--text-dark);
      margin-bottom: 10px;
    }

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

    /* Model Tags Floating Cloud */
    .models-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 20px;
    }

    .model-tag {
      padding: 8px 16px;
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: 50px;
      font-size: 0.88rem;
      font-weight: 700;
      color: var(--text-dark);
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
    }

    .model-tag:hover {
      background: var(--text-dark);
      color: #FFFFFF;
      transform: scale(1.05);
    }

    /* Comparison Table Component */
    .rating-badge-wrapper {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 20px;
      margin-bottom: 30px;
      background: #FFFFFF;
      padding: 20px;
      border-radius: var(--radius-md);
      border: 2px solid var(--vivid-accent-1);
      box-shadow: var(--shadow-md);
    }

    .rating-stars {
      color: #FFB800;
      font-size: 1.6rem;
      letter-spacing: 2px;
    }

    .rating-score {
      font-size: 2rem;
      font-weight: 900;
      color: var(--vivid-accent-1);
    }

    .table-container {
      width: 100%;
      overflow-x: auto;
      background: #FFFFFF;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 650px;
    }

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

    .compare-table th {
      background: #F8FAFC;
      font-weight: 800;
      color: var(--text-dark);
    }

    .compare-table tr:last-child td {
      border-bottom: none;
    }

    .highlight-cell {
      background: rgba(255, 46, 147, 0.04);
      font-weight: 700;
      color: var(--vivid-accent-1);
    }

    /* Timeline & Process */
    .timeline {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 20px;
      position: relative;
    }

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

    .step-num {
      font-size: 2.2rem;
      font-weight: 900;
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      margin-bottom: 10px;
    }

    /* Media Images Display */
    .media-gallery {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 20px;
      margin-top: 30px;
    }

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

    .ai-page-image {
      width: 100%;
      height: 220px;
      object-fit: cover;
      display: block;
      transition: transform 0.4s ease;
    }

    .media-card:hover .ai-page-image {
      transform: scale(1.04);
    }

    .media-info {
      padding: 16px 20px;
    }

    .media-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-dark);
    }

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

    .faq-item {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow: hidden;
      transition: border-color 0.3s ease;
    }

    .faq-header {
      padding: 20px 24px;
      font-weight: 700;
      font-size: 1.05rem;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      color: var(--text-dark);
      user-select: none;
    }

    .faq-header:after {
      content: "+";
      font-size: 1.4rem;
      font-weight: 400;
      color: var(--vivid-accent-1);
      transition: transform 0.3s ease;
    }

    .faq-item.active .faq-header:after {
      transform: rotate(45deg);
    }

    .faq-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s cubic-bezier(0, 1, 0, 1);
      background: #FAFBFD;
      padding: 0 24px;
      color: var(--text-muted);
      font-size: 0.98rem;
    }

    .faq-item.active .faq-content {
      max-height: 500px;
      padding: 0 24px 20px 24px;
      transition: max-height 0.35s ease-in-out;
    }

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

    .user-profile {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-top: 16px;
    }

    .avatar-circle {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary-gradient);
      color: #FFFFFF;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .user-info .name {
      font-weight: 700;
      font-size: 0.95rem;
      color: var(--text-dark);
    }

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

    /* Contact Form Section */
    .form-wrapper {
      background: #FFFFFF;
      padding: 40px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      max-width: 750px;
      margin: 0 auto;
    }

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

    .form-label {
      display: block;
      font-weight: 700;
      margin-bottom: 8px;
      font-size: 0.92rem;
      color: var(--text-dark);
    }

    .form-control {
      width: 100%;
      padding: 13px 16px;
      border: 1.5px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.98rem;
      transition: border-color 0.3s ease;
      background: #FAFBFD;
    }

    .form-control:focus {
      outline: none;
      border-color: var(--vivid-accent-1);
      background: #FFFFFF;
    }

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

    /* Network Map & Articles List */
    .article-list {
      list-style: none;
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 16px;
    }

    .article-item {
      background: #FFFFFF;
      padding: 18px 22px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      transition: border-color 0.3s ease;
    }

    .article-item:hover {
      border-color: var(--vivid-accent-2);
    }

    .article-item a {
      font-weight: 700;
      color: var(--text-dark);
    }

    /* Footer Styling */
    .site-footer {
      background: #0F172A;
      color: #94A3B8;
      padding: 60px 0 30px 0;
      font-size: 0.92rem;
    }

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

    .footer-col h4 {
      color: #FFFFFF;
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 18px;
    }

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

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

    .footer-links a {
      color: #94A3B8;
    }

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

    .friend-links-area {
      border-top: 1px solid #1E293B;
      padding-top: 24px;
      margin-top: 24px;
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      align-items: center;
    }

    .friend-links-area a {
      color: #64748B;
      font-size: 0.88rem;
    }

    .friend-links-area a:hover {
      color: var(--vivid-accent-2);
    }

    .footer-bottom {
      border-top: 1px solid #1E293B;
      padding-top: 24px;
      text-align: center;
      color: #64748B;
      font-size: 0.85rem;
    }

    /* Floating Customer Service Widget */
    .float-kefu {
      position: fixed;
      bottom: 30px;
      right: 30px;
      z-index: 999;
      background: #FFFFFF;
      padding: 12px;
      border-radius: var(--radius-md);
      box-shadow: 0 10px 30px rgba(0,0,0,0.15);
      border: 2px solid var(--vivid-accent-1);
      text-align: center;
      max-width: 140px;
    }

    .float-kefu img {
      width: 110px;
      height: 110px;
      border-radius: var(--radius-sm);
      object-fit: cover;
      display: block;
      margin: 0 auto 6px auto;
    }

    .float-kefu span {
      font-size: 0.8rem;
      font-weight: 800;
      color: var(--text-dark);
      display: block;
    }

    /* Responsive Design */
    @media (max-width: 992px) {
      .hero-h1 { font-size: 2.4rem; }
      .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      
      .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(0,0,0,0.1);
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.active { display: flex; }
      .nav-links li a { width: 100%; padding: 12px 0; }
    }

    @media (max-width: 640px) {
      .hero-h1 { font-size: 1.8rem; }
      .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
      .float-kefu { display: none; }
      .form-wrapper { padding: 24px 16px; }
    }