:root {
      --primary: #4f46e5;
      --primary-light: #6366f1;
      --rainbow-red: #f43f5e;
      --rainbow-orange: #fb923c;
      --rainbow-yellow: #f59e0b;
      --rainbow-green: #10b981;
      --rainbow-cyan: #06b6d4;
      --rainbow-blue: #3b82f6;
      --rainbow-purple: #8b5cf6;
      --bg-page: #f9fbfe;
      --bg-surface: #ffffff;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-light: #64748b;
      --border-soft: #e2e8f0;
      --border-accent: rgba(99, 102, 241, 0.2);
      --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04);
      --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.06);
      --shadow-lg: 0 16px 36px rgba(15, 23, 42, 0.08);
      --rainbow-gradient: linear-gradient(135deg, #f43f5e, #fb923c, #f59e0b, #10b981, #06b6d4, #3b82f6, #8b5cf6);
      --rainbow-soft-bg: linear-gradient(135deg, rgba(244, 63, 94, 0.05), rgba(245, 158, 11, 0.05), rgba(16, 185, 129, 0.05), rgba(59, 130, 246, 0.05), rgba(139, 92, 246, 0.05));
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 18px;
      --radius-full: 9999px;
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-page);
      background-image: radial-gradient(at 0% 0%, rgba(244, 63, 94, 0.04) 0px, transparent 50%),
                        radial-gradient(at 100% 0%, rgba(59, 130, 246, 0.04) 0px, transparent 50%),
                        radial-gradient(at 50% 50%, rgba(16, 185, 129, 0.03) 0px, transparent 60%);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    /* 容器统一居中体系 */
    .ai-container {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.25s ease;
    }

    /* 顶部彩虹装饰线条 */
    .rainbow-top-bar {
      height: 4px;
      width: 100%;
      background: var(--rainbow-gradient);
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      -webkit-backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-soft);
      box-shadow: var(--shadow-sm);
    }

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

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

    .brand-logo-box {
      max-width: 140px;
      display: flex;
      align-items: center;
    }

    .brand-title-sub {
      font-size: 13px;
      font-weight: 600;
      color: var(--primary);
      background: rgba(79, 70, 229, 0.08);
      padding: 3px 8px;
      border-radius: var(--radius-sm);
      white-space: nowrap;
    }

    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 0; /* 严格按照规定gap为0 */
      margin: 0;
      padding: 0;
    }

    .nav-item {
      display: inline-block;
    }

    .nav-item a {
      display: block;
      padding: 10px 14px;
      font-size: 14.5px;
      font-weight: 500;
      color: var(--text-muted);
      position: relative;
    }

    .nav-item a:hover,
    .nav-item a.active {
      color: var(--primary);
    }

    .nav-item a::after {
      content: "";
      position: absolute;
      bottom: 2px;
      left: 14px;
      right: 14px;
      height: 2px;
      background: var(--rainbow-gradient);
      transform: scaleX(0);
      transition: transform 0.25s ease;
    }

    .nav-item a:hover::after {
      transform: scaleX(1);
    }

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

    .btn-rainbow-nav {
      background: var(--rainbow-gradient);
      color: #ffffff;
      padding: 8px 18px;
      border-radius: var(--radius-full);
      font-size: 14px;
      font-weight: 600;
      border: none;
      cursor: pointer;
      box-shadow: 0 4px 12px rgba(99, 102, 241, 0.25);
      transition: transform 0.2s ease, box-shadow 0.2s ease;
      white-space: nowrap;
    }

    .btn-rainbow-nav:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 16px rgba(99, 102, 241, 0.35);
      color: #ffffff;
    }

    .mobile-menu-toggle {
      display: none;
      background: none;
      border: 1px solid var(--border-soft);
      padding: 6px 10px;
      border-radius: var(--radius-sm);
      cursor: pointer;
      font-size: 18px;
      color: var(--text-main);
    }

    /* 移动端菜单下拉 */
    .mobile-nav-panel {
      display: none;
      background: #ffffff;
      border-top: 1px solid var(--border-soft);
      padding: 16px 20px;
    }

    .mobile-nav-panel.open {
      display: block;
    }

    .mobile-nav-list {
      list-style: none;
    }

    .mobile-nav-list li {
      margin-bottom: 12px;
    }

    .mobile-nav-list a {
      display: block;
      font-size: 15px;
      font-weight: 500;
      color: var(--text-main);
      padding: 6px 0;
    }

    /* 首屏 HERO 区域 - 严格无图片要求 */
    .hero-section {
      padding: 70px 0 60px;
      position: relative;
      background: linear-gradient(180deg, rgba(255, 255, 255, 0.9) 0%, rgba(240, 245, 255, 0.6) 100%);
      border-bottom: 1px solid var(--border-soft);
      overflow: hidden;
    }

    .hero-glow-1, .hero-glow-2, .hero-glow-3 {
      position: absolute;
      border-radius: 50%;
      filter: blur(80px);
      opacity: 0.25;
      z-index: 0;
      pointer-events: none;
    }

    .hero-glow-1 {
      width: 320px;
      height: 320px;
      background: #f43f5e;
      top: -80px;
      left: -60px;
    }

    .hero-glow-2 {
      width: 380px;
      height: 380px;
      background: #3b82f6;
      bottom: -60px;
      right: -80px;
    }

    .hero-glow-3 {
      width: 280px;
      height: 280px;
      background: #10b981;
      top: 40%;
      left: 60%;
    }

    .hero-content {
      position: relative;
      z-index: 1;
      text-align: center;
      max-width: 900px;
      margin: 0 auto;
    }

    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #ffffff;
      padding: 6px 16px;
      border-radius: var(--radius-full);
      box-shadow: var(--shadow-sm);
      border: 1px solid rgba(99, 102, 241, 0.2);
      font-size: 13.5px;
      font-weight: 600;
      color: var(--primary);
      margin-bottom: 24px;
    }

    .hero-tag-dot {
      width: 8px;
      height: 8px;
      background: #10b981;
      border-radius: 50%;
      box-shadow: 0 0 8px #10b981;
      animation: pulseDot 2s infinite;
    }

    @keyframes pulseDot {
      0%, 100% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.4; transform: scale(0.85); }
    }

    .hero-title {
      font-size: 42px;
      font-weight: 800;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .rainbow-text {
      background: var(--rainbow-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      display: inline-block;
    }

    .hero-subtitle {
      font-size: 18px;
      color: var(--text-muted);
      max-width: 760px;
      margin: 0 auto 36px;
      line-height: 1.7;
    }

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

    .btn-primary-official {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      background: var(--rainbow-gradient);
      color: #ffffff !important;
      font-size: 17px;
      font-weight: 700;
      padding: 15px 38px;
      border-radius: var(--radius-full);
      box-shadow: 0 10px 24px rgba(79, 70, 229, 0.28);
      border: none;
      transition: transform 0.2s ease, box-shadow 0.2s ease;
    }

    .btn-primary-official:hover {
      transform: translateY(-3px) scale(1.02);
      box-shadow: 0 14px 30px rgba(79, 70, 229, 0.38);
    }

    .btn-secondary-link {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      background: #ffffff;
      color: var(--text-main);
      font-size: 16px;
      font-weight: 600;
      padding: 14px 32px;
      border-radius: var(--radius-full);
      border: 1px solid var(--border-soft);
      box-shadow: var(--shadow-sm);
      transition: all 0.2s ease;
    }

    .btn-secondary-link:hover {
      background: #f8fafc;
      border-color: #cbd5e1;
      transform: translateY(-2px);
    }

    /* 纯 CSS 首屏科技指标网格 (无图片) */
    .hero-metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
      text-align: left;
    }

    .hero-metric-card {
      background: #ffffff;
      border: 1px solid var(--border-soft);
      border-radius: var(--radius-md);
      padding: 20px;
      box-shadow: var(--shadow-sm);
      position: relative;
      overflow: hidden;
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }

    .hero-metric-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 3px;
      background: var(--rainbow-gradient);
    }

    .hero-metric-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }

    .metric-number {
      font-size: 28px;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.1;
      margin-bottom: 6px;
    }

    .metric-number span {
      font-size: 15px;
      font-weight: 600;
      color: var(--primary);
    }

    .metric-label {
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.4;
    }

    /* 通用板块外框与标题体系 */
    .section-wrap {
      padding: 72px 0;
      position: relative;
    }

    .section-bg-alt {
      background: #ffffff;
      border-top: 1px solid var(--border-soft);
      border-bottom: 1px solid var(--border-soft);
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 48px;
    }

    .section-badge {
      display: inline-block;
      font-size: 12.5px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.5px;
      padding: 4px 12px;
      border-radius: var(--radius-full);
      background: rgba(99, 102, 241, 0.08);
      color: var(--primary);
      margin-bottom: 12px;
      border: 1px solid rgba(99, 102, 241, 0.15);
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 14px;
      letter-spacing: -0.3px;
    }

    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 平台核心模型跑马灯标签阵列 */
    .model-chips-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 24px;
    }

    .model-chip {
      background: #ffffff;
      border: 1px solid var(--border-soft);
      padding: 6px 14px;
      border-radius: var(--radius-full);
      font-size: 13px;
      font-weight: 600;
      color: var(--text-main);
      box-shadow: 0 1px 3px rgba(0,0,0,0.03);
      display: inline-flex;
      align-items: center;
      gap: 6px;
      transition: all 0.2s ease;
    }

    .model-chip::before {
      content: "";
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--rainbow-gradient);
    }

    .model-chip:hover {
      border-color: var(--primary);
      transform: translateY(-2px);
      box-shadow: var(--shadow-sm);
    }

    /* 关于我们 & 平台介绍卡片 */
    .about-feature-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-bottom: 40px;
    }

    .about-card {
      background: #ffffff;
      border: 1px solid var(--border-soft);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
      position: relative;
    }

    .about-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
      border-color: rgba(99, 102, 241, 0.4);
    }

    .about-icon {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      font-weight: 800;
      color: #ffffff;
      margin-bottom: 18px;
      background: var(--rainbow-gradient);
    }

    .about-card h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }

    .about-card p {
      font-size: 14.5px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* AIGC 服务矩阵与图文融合 */
    .service-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .service-card {
      background: #ffffff;
      border: 1px solid var(--border-soft);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: all 0.25s ease;
      position: relative;
    }

    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: rgba(79, 70, 229, 0.3);
    }

    .service-badge {
      display: inline-block;
      font-size: 12px;
      font-weight: 600;
      color: #ffffff;
      padding: 3px 10px;
      border-radius: var(--radius-full);
      margin-bottom: 14px;
      align-self: flex-start;
      background: var(--rainbow-gradient);
    }

    .service-card h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .service-card p {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 16px;
      line-height: 1.6;
    }

    .service-features-list {
      list-style: none;
      padding: 0;
      margin: 0 0 16px 0;
      border-top: 1px dashed var(--border-soft);
      padding-top: 12px;
    }

    .service-features-list li {
      font-size: 13px;
      color: var(--text-light);
      margin-bottom: 6px;
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .service-features-list li::before {
      content: "✓";
      color: var(--rainbow-green);
      font-weight: bold;
    }

    /* 图文并排版块（制作与场景） */
    .showcase-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      align-items: center;
      margin-bottom: 50px;
    }

    .showcase-img-box {
      background: #ffffff;
      padding: 8px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-soft);
      box-shadow: var(--shadow-md);
      overflow: hidden;
      display: flex;
      justify-content: center;
      align-items: center;
    }

    .showcase-img-box img {
      width: 100%;
      height: auto;
      border-radius: calc(var(--radius-md) - 4px);
      display: block;
    }

    .showcase-text-box h3 {
      font-size: 26px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 16px;
    }

    .showcase-text-box p {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
    }

    /* 流程步骤 */
    .workflow-steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .step-card {
      background: #ffffff;
      border: 1px solid var(--border-soft);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      position: relative;
    }

    .step-num {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: var(--rainbow-gradient);
      color: #ffffff;
      font-size: 16px;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 16px;
    }

    .step-card h3 {
      font-size: 17px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .step-card p {
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 对比评测要求板块 */
    .comparison-section {
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-soft);
      box-shadow: var(--shadow-md);
      padding: 36px;
      margin: 0 auto;
    }

    .comparison-score-bar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      background: var(--rainbow-soft-bg);
      border: 1px solid rgba(99, 102, 241, 0.2);
      border-radius: var(--radius-md);
      padding: 20px 28px;
      margin-bottom: 30px;
    }

    .score-left {
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .score-big {
      font-size: 42px;
      font-weight: 900;
      color: var(--primary);
      line-height: 1;
    }

    .score-stars {
      color: #f59e0b;
      font-size: 20px;
      letter-spacing: 2px;
    }

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

    .score-right-btn {
      margin-top: 10px;
    }

    .comparison-table-wrapper {
      width: 100%;
      overflow-x: auto;
    }

    .comparison-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14.5px;
    }

    .comparison-table th,
    .comparison-table td {
      padding: 16px 18px;
      border-bottom: 1px solid var(--border-soft);
    }

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

    .comparison-table tr:hover td {
      background: #fbfcfe;
    }

    .highlight-brand {
      color: var(--primary);
      font-weight: 700;
      background: rgba(79, 70, 229, 0.04);
    }

    .tag-pro {
      color: var(--rainbow-green);
      font-weight: 700;
    }

    .tag-con {
      color: #94a3b8;
    }

    /* Token 比价板块 */
    .token-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      margin-top: 30px;
    }

    .token-card {
      background: #ffffff;
      border: 1px solid var(--border-soft);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      text-align: center;
      transition: all 0.2s ease;
    }

    .token-card:hover {
      border-color: var(--primary);
      transform: translateY(-3px);
    }

    .token-model-name {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .token-official-price {
      font-size: 13px;
      color: #94a3b8;
      text-decoration: line-through;
      margin-bottom: 4px;
    }

    .token-our-price {
      font-size: 24px;
      font-weight: 800;
      color: var(--rainbow-red);
      margin-bottom: 12px;
    }

    .token-our-price span {
      font-size: 13px;
      font-weight: 500;
      color: var(--text-muted);
    }

    .token-tag {
      display: inline-block;
      font-size: 12px;
      font-weight: 600;
      padding: 3px 10px;
      border-radius: var(--radius-full);
      background: rgba(16, 185, 129, 0.1);
      color: var(--rainbow-green);
    }

    /* 案例展示横幅区 */
    .banners-quad-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 24px;
    }

    .banner-item {
      background: #ffffff;
      border: 1px solid var(--border-soft);
      border-radius: var(--radius-md);
      padding: 6px;
      box-shadow: var(--shadow-sm);
      overflow: hidden;
      transition: transform 0.25s ease;
    }

    .banner-item:hover {
      transform: scale(1.03);
      box-shadow: var(--shadow-md);
    }

    .banner-item img {
      width: 100%;
      height: 180px;
      object-fit: cover;
      border-radius: calc(var(--radius-md) - 2px);
      display: block;
    }

    /* 客户评价板块 - 6 条 */
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .testimonial-card {
      background: #ffffff;
      border: 1px solid var(--border-soft);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      position: relative;
    }

    .testimonial-card:hover {
      box-shadow: var(--shadow-md);
      border-color: rgba(99, 102, 241, 0.3);
    }

    .testimonial-content {
      font-size: 14.5px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 20px;
      font-style: italic;
    }

    .testimonial-user {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-soft);
      padding-top: 14px;
    }

    .user-avatar-initial {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--rainbow-gradient);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 16px;
    }

    .user-name {
      font-size: 14.5px;
      font-weight: 700;
      color: var(--text-main);
    }

    .user-role {
      font-size: 12.5px;
      color: var(--text-light);
    }

    /* 行业资讯与最新文章 */
    .articles-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
    }

    .article-box {
      background: #ffffff;
      border: 1px solid var(--border-soft);
      border-radius: var(--radius-md);
      padding: 26px;
      box-shadow: var(--shadow-sm);
    }

    .article-box h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 16px;
      color: var(--text-main);
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .article-box h3::before {
      content: "";
      width: 4px;
      height: 18px;
      background: var(--rainbow-gradient);
      border-radius: 2px;
    }

    .article-link-list {
      list-style: none;
    }

    .article-link-list li {
      margin-bottom: 12px;
      padding-bottom: 12px;
      border-bottom: 1px dashed var(--border-soft);
    }

    .article-link-list li:last-child {
      border-bottom: none;
      margin-bottom: 0;
      padding-bottom: 0;
    }

    .article-link-list a {
      font-size: 14.5px;
      color: var(--text-muted);
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .article-link-list a:hover {
      color: var(--primary);
    }

    /* FAQ 手风琴面板 */
    .faq-accordion {
      max-width: 900px;
      margin: 0 auto;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-soft);
      border-radius: var(--radius-md);
      margin-bottom: 14px;
      overflow: hidden;
      transition: all 0.2s ease;
    }

    .faq-item:hover {
      border-color: rgba(99, 102, 241, 0.4);
    }

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

    .faq-icon-arrow {
      font-size: 18px;
      font-weight: bold;
      color: var(--primary);
      transition: transform 0.25s ease;
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background: #fafcff;
      border-top: 1px solid transparent;
      padding: 0 24px;
    }

    .faq-item.active .faq-answer {
      max-height: 240px;
      padding: 16px 24px 20px;
      border-top-color: var(--border-soft);
    }

    .faq-answer p {
      font-size: 14.5px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 需求匹配与表单区 */
    .form-section-box {
      background: #ffffff;
      border: 1px solid var(--border-soft);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-md);
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .form-info h3 {
      font-size: 26px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 16px;
    }

    .form-info p {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 24px;
    }

    .contact-item-row {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
      font-size: 14.5px;
      color: var(--text-main);
    }

    .contact-icon-badge {
      width: 32px;
      height: 32px;
      border-radius: 8px;
      background: rgba(99, 102, 241, 0.1);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
    }

    .demand-form {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .form-group label {
      font-size: 13.5px;
      font-weight: 600;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border-soft);
      border-radius: var(--radius-sm);
      font-size: 14px;
      outline: none;
      transition: border-color 0.2s ease, box-shadow 0.2s ease;
      background: #fdfdfd;
      color: var(--text-main);
    }

    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.12);
      background: #ffffff;
    }

    textarea.form-control {
      min-height: 96px;
      resize: vertical;
    }

    .btn-submit-form {
      background: var(--rainbow-gradient);
      color: #ffffff;
      font-size: 16px;
      font-weight: 700;
      padding: 14px;
      border: none;
      border-radius: var(--radius-sm);
      cursor: pointer;
      box-shadow: 0 4px 14px rgba(79, 70, 229, 0.3);
      transition: transform 0.2s ease, box-shadow 0.2s ease;
    }

    .btn-submit-form:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(79, 70, 229, 0.4);
    }

    /* 加盟代理板块 */
    .agent-cta-card {
      background: var(--rainbow-soft-bg);
      border: 1px solid rgba(99, 102, 241, 0.25);
      border-radius: var(--radius-lg);
      padding: 40px;
      text-align: center;
      position: relative;
      overflow: hidden;
    }

    .agent-cta-card h3 {
      font-size: 28px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 14px;
    }

    .agent-cta-card p {
      font-size: 16px;
      color: var(--text-muted);
      max-width: 720px;
      margin: 0 auto 28px;
      line-height: 1.7;
    }

    /* 友情链接与底部区域 - 确保深色正文对比度高 */
    .site-footer {
      background: #ffffff;
      border-top: 1px solid var(--border-soft);
      padding: 50px 0 30px;
      color: var(--text-muted);
      font-size: 14px;
    }

    .footer-top-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 32px;
      margin-bottom: 40px;
    }

    .footer-col h4 {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 18px;
    }

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

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

    .footer-links-list a {
      color: var(--text-muted);
    }

    .footer-links-list a:hover {
      color: var(--primary);
    }

    .friend-links-box {
      border-top: 1px solid var(--border-soft);
      padding-top: 24px;
      margin-bottom: 24px;
    }

    .friend-links-title {
      font-size: 13.5px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }

    .friend-links-list {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
    }

    .friend-links-list a {
      font-size: 13px;
      color: var(--text-muted);
    }

    .friend-links-list a:hover {
      color: var(--primary);
      text-decoration: underline;
    }

    .footer-bottom-bar {
      border-top: 1px solid var(--border-soft);
      padding-top: 20px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 14px;
      font-size: 13px;
      color: var(--text-light);
    }

    .qr-container {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .qr-box {
      width: 88px;
      height: 88px;
      background: #ffffff;
      border: 1px solid var(--border-soft);
      border-radius: var(--radius-sm);
      padding: 4px;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .qr-box img {
      max-width: 100%;
      height: auto;
      border-radius: 4px;
    }

    /* 悬浮客服挂件 */
    .float-service-widget {
      position: fixed;
      right: 20px;
      bottom: 40px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid var(--border-soft);
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-weight: bold;
      cursor: pointer;
      position: relative;
      transition: all 0.2s ease;
    }

    .float-btn:hover {
      background: var(--rainbow-gradient);
      color: #ffffff;
      transform: scale(1.08);
    }

    .float-qr-popover {
      display: none;
      position: absolute;
      right: 60px;
      bottom: 0;
      background: #ffffff;
      padding: 12px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-soft);
      width: 140px;
      text-align: center;
    }

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

    .float-qr-popover img {
      width: 100%;
      height: auto;
      display: block;
      margin-bottom: 6px;
    }

    .float-qr-popover span {
      font-size: 12px;
      font-weight: 600;
      color: var(--text-main);
    }

    /* 响应式媒体查询 */
    @media (max-width: 1024px) {
      .hero-title {
        font-size: 34px;
      }
      .hero-metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .about-feature-grid,
      .service-grid,
      .testimonials-grid,
      .token-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .workflow-steps-grid,
      .banners-quad-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-top-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-links,
      .header-actions .btn-rainbow-nav {
        display: none;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .hero-title {
        font-size: 28px;
      }
      .hero-subtitle {
        font-size: 15px;
      }
      .hero-metrics-grid {
        grid-template-columns: 1fr;
      }
      .about-feature-grid,
      .service-grid,
      .testimonials-grid,
      .token-grid,
      .workflow-steps-grid,
      .banners-quad-grid,
      .articles-grid {
        grid-template-columns: 1fr;
      }
      .showcase-row {
        grid-template-columns: 1fr;
      }
      .form-section-box {
        grid-template-columns: 1fr;
        padding: 24px;
      }
      .footer-top-grid {
        grid-template-columns: 1fr;
      }
      .comparison-score-bar {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
      }
    }