/* ==========================================================================
       彩虹多彩风格 (Rainbow Colorful Theme) - 基础与变量
       ========================================================================== */
    :root {
      --primary: #6366f1;
      --primary-gradient: linear-gradient(135deg, #ff4e50 0%, #f9d423 25%, #22c55e 50%, #3b82f6 75%, #a855f7 100%);
      --rainbow-subtle: linear-gradient(135deg, rgba(255, 78, 80, 0.05) 0%, rgba(59, 130, 246, 0.05) 50%, rgba(168, 85, 247, 0.05) 100%);
      --rainbow-border: linear-gradient(90deg, #ff4d4d, #f9cb28, #26d0ce, #1a2980, #ff007f);
      --bg-main: #f8fafc;
      --bg-white: #ffffff;
      --bg-card: #ffffff;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-light: #64748b;
      --border-color: #e2e8f0;
      --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.04);
      --shadow-md: 0 6px 18px rgba(0, 0, 0, 0.06);
      --shadow-lg: 0 12px 32px rgba(99, 102, 241, 0.12);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

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

    body {
      overflow-x: hidden;
      display: flex;
      flex-direction: column;
      min-height: 100vh;
    }

    a {
      color: inherit;
      text-decoration: none;
    }

    /* 顶部彩虹绚丽线 */
    .rainbow-top-bar {
      height: 4px;
      background: var(--primary-gradient);
      width: 100%;
      position: fixed;
      top: 0;
      left: 0;
      z-index: 1001;
    }

    /* 全局统一居中容器 */
    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 20px;
    }

    .section-padding {
      padding: 80px 0;
    }

    /* 标题通用样式 */
    .section-title-wrap {
      text-align: center;
      margin-bottom: 50px;
    }

    .section-badge {
      display: inline-block;
      padding: 6px 16px;
      border-radius: 30px;
      font-size: 14px;
      font-weight: 600;
      background: #ffffff;
      border: 1px solid transparent;
      background-image: linear-gradient(white, white), var(--rainbow-border);
      background-origin: border-box;
      background-clip: padding-box, border-box;
      color: #334155;
      margin-bottom: 14px;
      box-shadow: 0 2px 10px rgba(0,0,0,0.03);
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 12px;
      letter-spacing: -0.5px;
    }

    .section-subtitle {
      font-size: 16px;
      color: var(--text-muted);
      max-width: 700px;
      margin: 0 auto;
    }

    /* ==========================================================================
       1. 顶部导航 (Header & Nav)
       ========================================================================== */
    .site-header {
      position: sticky;
      top: 4px;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      z-index: 1000;
      transition: var(--transition);
    }

    .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;
      object-fit: contain;
    }

    .brand-name {
      font-size: 20px;
      font-weight: 800;
      background: linear-gradient(135deg, #2563eb, #7c3aed);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    /* CSS 规则必须严格执行：.nav-links 的 gap 属性设置为 0 */
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }

    .nav-links li a {
      display: inline-block;
      padding: 8px 12px;
      font-size: 14px;
      font-weight: 500;
      color: var(--text-muted);
      transition: var(--transition);
      border-radius: var(--radius-sm);
    }

    .nav-links li a:hover,
    .nav-links li a.active {
      color: #2563eb;
      background: rgba(37, 99, 235, 0.06);
    }

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

    .btn-rainbow {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 14px;
      font-weight: 700;
      color: #ffffff !important;
      background: linear-gradient(135deg, #2563eb 0%, #7c3aed 50%, #db2777 100%);
      border-radius: 30px;
      box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
      transition: var(--transition);
      border: none;
      cursor: pointer;
    }

    .btn-rainbow:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(37, 99, 235, 0.45);
      filter: brightness(1.05);
    }

    .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 var(--border-color);
      border-radius: 30px;
      transition: var(--transition);
    }

    .btn-outline:hover {
      border-color: #2563eb;
      color: #2563eb;
      background: rgba(37, 99, 235, 0.03);
    }

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

    /* ==========================================================================
       2. Hero 首屏 (禁用任何图片资源)
       ========================================================================== */
    .hero-section {
      padding: 90px 0 70px;
      background: radial-gradient(circle at 50% 10%, rgba(99, 102, 241, 0.08) 0%, rgba(248, 250, 252, 0) 70%), var(--bg-white);
      border-bottom: 1px solid var(--border-color);
      text-align: center;
      position: relative;
    }

    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      border-radius: 30px;
      background: #eff6ff;
      border: 1px solid #bfdbfe;
      color: #1d4ed8;
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 24px;
    }

    .hero-tag-pulse {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #2563eb;
      box-shadow: 0 0 0 0 rgba(37, 99, 235, 0.7);
      animation: pulse 2s infinite;
    }

    @keyframes pulse {
      0% { box-shadow: 0 0 0 0 rgba(37, 99, 235, 0.7); }
      70% { box-shadow: 0 0 0 10px rgba(37, 99, 235, 0); }
      100% { box-shadow: 0 0 0 0 rgba(37, 99, 235, 0); }
    }

    /* H1 要求改写控制在20字以内 */
    .hero-h1 {
      font-size: 44px;
      font-weight: 900;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -1px;
    }

    .hero-h1-gradient {
      background: linear-gradient(135deg, #ef4444, #eab308, #10b981, #3b82f6, #8b5cf6);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      font-size: 18px;
      color: var(--text-muted);
      max-width: 840px;
      margin: 0 auto 36px;
      line-height: 1.7;
    }

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

    .hero-btn-primary {
      padding: 14px 36px;
      font-size: 16px;
    }

    .hero-stats {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      max-width: 1000px;
      margin: 0 auto;
      padding: 24px;
      background: #ffffff;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border-color);
    }

    .stat-card {
      text-align: center;
      padding: 10px;
      position: relative;
    }

    .stat-card:not(:last-child)::after {
      content: '';
      position: absolute;
      right: 0;
      top: 20%;
      height: 60%;
      width: 1px;
      background: var(--border-color);
    }

    .stat-num {
      font-size: 28px;
      font-weight: 800;
      color: #1e293b;
      margin-bottom: 4px;
      background: linear-gradient(135deg, #2563eb, #7c3aed);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .stat-label {
      font-size: 13px;
      color: var(--text-light);
      font-weight: 500;
    }

    /* ==========================================================================
       3. 关于我们 / 平台介绍 (About)
       ========================================================================== */
    .about-section {
      background: var(--bg-white);
    }

    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .about-content h3 {
      font-size: 26px;
      font-weight: 800;
      margin-bottom: 18px;
      color: var(--text-main);
    }

    .about-content p {
      font-size: 15px;
      color: var(--text-muted);
      margin-bottom: 20px;
      line-height: 1.8;
    }

    .about-highlights {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      margin-top: 24px;
    }

    .highlight-item {
      padding: 14px;
      background: var(--bg-main);
      border-radius: var(--radius-sm);
      border-left: 4px solid #2563eb;
    }

    .highlight-item:nth-child(2) { border-left-color: #10b981; }
    .highlight-item:nth-child(3) { border-left-color: #f59e0b; }
    .highlight-item:nth-child(4) { border-left-color: #8b5cf6; }

    .highlight-title {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 4px;
    }

    .highlight-desc {
      font-size: 12px;
      color: var(--text-light);
    }

    .about-card-display {
      background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px;
      box-shadow: var(--shadow-sm);
    }

    .model-badge-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 16px;
    }

    .model-tag {
      padding: 6px 12px;
      background: #ffffff;
      border: 1px solid #e2e8f0;
      border-radius: 20px;
      font-size: 12px;
      font-weight: 600;
      color: #334155;
      box-shadow: 0 1px 3px rgba(0,0,0,0.04);
      transition: var(--transition);
    }

    .model-tag:hover {
      border-color: #3b82f6;
      color: #2563eb;
      transform: translateY(-1px);
    }

    /* ==========================================================================
       4. AIGC服务 / 一站式制作 (Services & Creation)
       ========================================================================== */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .service-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      transition: var(--transition);
      position: relative;
      overflow: hidden;
    }

    .service-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 4px;
      background: linear-gradient(90deg, #3b82f6, #8b5cf6);
      opacity: 0;
      transition: var(--transition);
    }

    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: #cbd5e1;
    }

    .service-card:hover::before {
      opacity: 1;
    }

    .service-icon {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: #eff6ff;
      color: #2563eb;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      font-weight: bold;
      margin-bottom: 20px;
    }

    .service-card:nth-child(2) .service-icon { background: #ecfdf5; color: #059669; }
    .service-card:nth-child(3) .service-icon { background: #fef3c7; color: #d97706; }
    .service-card:nth-child(4) .service-icon { background: #f3e8ff; color: #7c3aed; }
    .service-card:nth-child(5) .service-icon { background: #ffe4e6; color: #e11d48; }
    .service-card:nth-child(6) .service-icon { background: #e0f2fe; color: #0284c7; }

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

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

    /* ==========================================================================
       5. 行业方案与多场景矩阵 (Solutions & Matrix)
       ========================================================================== */
    .solutions-section {
      background: var(--bg-white);
    }

    .matrix-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
    }

    .matrix-item {
      background: var(--bg-main);
      padding: 20px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
      transition: var(--transition);
    }

    .matrix-item:hover {
      background: #ffffff;
      border-color: #3b82f6;
      box-shadow: var(--shadow-sm);
    }

    .matrix-name {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 6px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .matrix-tag {
      font-size: 11px;
      padding: 2px 8px;
      border-radius: 10px;
      background: #dbeafe;
      color: #1e40af;
    }

    .matrix-text {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* ==========================================================================
       6. 标准流程 (Process)
       ========================================================================== */
    .process-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

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

    .step-num {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--primary-gradient);
      color: #ffffff;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 16px;
    }

    .step-title {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
    }

    .step-desc {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* ==========================================================================
       7. 案例中心 (Cases & Showcase - 包含媒体图片)
       ========================================================================== */
    .cases-section {
      background: var(--bg-white);
    }

    .cases-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 30px;
    }

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

    .case-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-3px);
    }

    .case-img-wrap {
      width: 100%;
      overflow: hidden;
      background: #f1f5f9;
      aspect-ratio: 16 / 9;
    }

    .case-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: var(--transition);
    }

    .case-card:hover .case-img-wrap img {
      transform: scale(1.03);
    }

    .case-body {
      padding: 24px;
    }

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

    .case-desc {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 16px;
    }

    .case-tags {
      display: flex;
      gap: 8px;
      flex-wrap: wrap;
    }

    /* ==========================================================================
       8. 对比评测 (Comparison & Score Section - 9.9分, 5星)
       ========================================================================== */
    .comparison-section {
      background: var(--bg-main);
    }

    .rating-banner {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 30px;
      margin-bottom: 40px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      box-shadow: var(--shadow-md);
      border-left: 6px solid #2563eb;
    }

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

    .score-big {
      font-size: 48px;
      font-weight: 900;
      color: #2563eb;
      line-height: 1;
    }

    .score-stars {
      color: #f59e0b;
      font-size: 24px;
      letter-spacing: 2px;
    }

    .rating-text h4 {
      font-size: 20px;
      font-weight: 800;
      color: var(--text-main);
    }

    .rating-text p {
      font-size: 14px;
      color: var(--text-muted);
    }

    .compare-table-wrap {
      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);
      font-size: 14px;
    }

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

    .compare-table td.highlight {
      background: rgba(37, 99, 235, 0.03);
      font-weight: 700;
      color: #2563eb;
    }

    /* ==========================================================================
       9. Token比价与需求匹配 (Token Comparison)
       ========================================================================== */
    .token-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .token-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      text-align: center;
      box-shadow: var(--shadow-sm);
    }

    .token-card.popular {
      border: 2px solid #2563eb;
      position: relative;
    }

    .popular-badge {
      position: absolute;
      top: -12px;
      left: 50%;
      transform: translateX(-50%);
      background: #2563eb;
      color: #ffffff;
      font-size: 11px;
      padding: 2px 12px;
      border-radius: 10px;
      font-weight: 700;
    }

    .token-price {
      font-size: 32px;
      font-weight: 900;
      color: var(--text-main);
      margin: 16px 0;
    }

    .token-price span {
      font-size: 14px;
      color: var(--text-light);
      font-weight: normal;
    }

    .token-list {
      list-style: none;
      margin-bottom: 24px;
      font-size: 13px;
      color: var(--text-muted);
      text-align: left;
    }

    .token-list li {
      padding: 6px 0;
      border-bottom: 1px dashed var(--border-color);
    }

    /* ==========================================================================
       10. 客户评论 (6 User Reviews)
       ========================================================================== */
    .reviews-section {
      background: var(--bg-white);
    }

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

    .review-card {
      background: var(--bg-main);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-stars {
      color: #f59e0b;
      margin-bottom: 12px;
      font-size: 14px;
    }

    .review-text {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
      font-style: italic;
    }

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

    .user-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: linear-gradient(135deg, #3b82f6, #8b5cf6);
      color: #ffffff;
      font-weight: bold;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 16px;
    }

    .user-info h5 {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-main);
    }

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

    /* ==========================================================================
       11. 常见问题 (FAQ Accordion - 10+ items)
       ========================================================================== */
    .faq-container {
      max-width: 900px;
      margin: 0 auto;
    }

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

    .faq-question {
      width: 100%;
      padding: 18px 24px;
      text-align: left;
      background: none;
      border: none;
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      display: flex;
      align-items: center;
      justify-content: space-between;
      cursor: pointer;
      transition: var(--transition);
    }

    .faq-question:hover {
      color: #2563eb;
    }

    .faq-icon {
      font-size: 18px;
      transition: transform 0.3s;
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background: #f8fafc;
    }

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

    .faq-answer p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* ==========================================================================
       12. AI百科与资讯 (Encyclopedia & News)
       ========================================================================== */
    .news-section {
      background: var(--bg-white);
    }

    .news-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 30px;
    }

    .news-box h4 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 16px;
      padding-bottom: 10px;
      border-bottom: 2px solid #e2e8f0;
      color: var(--text-main);
    }

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

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

    .article-list a {
      display: block;
      padding: 12px 16px;
      background: var(--bg-main);
      border-radius: var(--radius-sm);
      font-size: 14px;
      color: var(--text-main);
      transition: var(--transition);
      border-left: 3px solid transparent;
    }

    .article-list a:hover {
      background: #eff6ff;
      border-left-color: #2563eb;
      color: #2563eb;
    }

    /* ==========================================================================
       13. 联系我们 & 表单 (Contact & Form)
       ========================================================================== */
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
    }

    .contact-info-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }

    .contact-item {
      display: flex;
      align-items: flex-start;
      gap: 16px;
      margin-bottom: 24px;
    }

    .contact-icon-box {
      width: 44px;
      height: 44px;
      border-radius: 10px;
      background: #eff6ff;
      color: #2563eb;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      font-size: 18px;
      flex-shrink: 0;
    }

    .qr-box {
      margin-top: 20px;
      padding: 16px;
      background: #f8fafc;
      border-radius: var(--radius-sm);
      display: inline-block;
      text-align: center;
    }

    .qr-box img {
      width: 140px;
      height: 140px;
      object-fit: cover;
      border-radius: 8px;
      margin-bottom: 8px;
    }

    /* 表单样式 */
    .form-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }

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

    .form-label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .form-input,
    .form-select,
    .form-textarea {
      width: 100%;
      padding: 12px 16px;
      font-size: 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      background: #ffffff;
      color: var(--text-main);
      outline: none;
      transition: var(--transition);
    }

    .form-input:focus,
    .form-select:focus,
    .form-textarea:focus {
      border-color: #2563eb;
      box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
    }

    .form-textarea {
      height: 110px;
      resize: vertical;
    }

    /* ==========================================================================
       14. 页脚与友情链接 (Footer & Friendly Links)
       ========================================================================== */
    .site-footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 60px 0 30px;
      margin-top: auto;
    }

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

    .footer-brand h4 {
      font-size: 20px;
      color: #ffffff;
      margin-bottom: 12px;
    }

    .footer-brand p {
      font-size: 13px;
      line-height: 1.7;
    }

    .footer-col h5 {
      font-size: 15px;
      color: #ffffff;
      margin-bottom: 16px;
    }

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

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

    .footer-links a {
      font-size: 13px;
      color: #94a3b8;
      transition: var(--transition);
    }

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

    .friend-links-wrap {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      margin-top: 24px;
    }

    .friend-links-title {
      font-size: 13px;
      color: #64748b;
      margin-bottom: 12px;
      font-weight: 600;
    }

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

    .friend-links-flex a {
      font-size: 13px;
      color: #94a3b8;
      transition: var(--transition);
    }

    .friend-links-flex a:hover {
      color: #38bdf8;
    }

    .footer-copyright {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      margin-top: 30px;
      text-align: center;
      font-size: 13px;
      color: #64748b;
    }

    /* 浮动客服 */
    .float-kefu {
      position: fixed;
      right: 20px;
      bottom: 30px;
      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-color);
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      color: #2563eb;
      cursor: pointer;
      transition: var(--transition);
    }

    .float-btn:hover {
      transform: scale(1.1);
      background: #2563eb;
      color: #ffffff;
    }

    /* ==========================================================================
       响应式适配 (Responsive Styles)
       ========================================================================== */
    @media (max-width: 1024px) {
      .services-grid,
      .matrix-grid,
      .token-grid,
      .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .process-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .site-header { position: relative; }
      .mobile-menu-toggle { display: block; }
      .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        padding: 16px;
        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; width: 100%; padding: 10px; }
      .nav-actions { display: none; }
      .hero-h1 { font-size: 28px; }
      .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 16px; }
      .stat-card:not(:last-child)::after { display: none; }
      .about-grid,
      .cases-grid,
      .contact-grid,
      .news-grid,
      .services-grid,
      .matrix-grid,
      .token-grid,
      .reviews-grid,
      .process-steps {
        grid-template-columns: 1fr;
      }
      .rating-banner {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
      }
      .footer-grid { grid-template-columns: 1fr; }
    }