/* 全局重置与基础变量 (高饱和艳彩风 + 浅色底底色) */
    :root {
      --primary: #4f46e5;
      --primary-vibrant: #6366f1;
      --secondary: #ec4899;
      --accent-cyan: #06b6d4;
      --accent-orange: #f97316;
      --accent-emerald: #10b981;
      --accent-purple: #a855f7;
      --bg-main: #f8fafc;
      --bg-card: #ffffff;
      --bg-soft: #f1f5f9;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-light: #64748b;
      --border-color: #e2e8f0;
      --border-focus: #818cf8;
      --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
      --shadow-md: 0 4px 6px -1px rgba(79, 70, 229, 0.08), 0 2px 4px -2px rgba(79, 70, 229, 0.05);
      --shadow-lg: 0 10px 25px -3px rgba(99, 102, 241, 0.12), 0 4px 6px -4px rgba(99, 102, 241, 0.07);
      --shadow-vibrant: 0 12px 30px -5px rgba(236, 72, 153, 0.2);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --radius-full: 9999px;
      --container-max: 1240px;
      --transition-base: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }

    * {
      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", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition-base);
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    /* 统一容器体系 */
    .container {
      width: 100%;
      max-width: var(--container-max);
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 顶部导航栏 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      transition: var(--transition-base);
    }

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

    .brand-box {
      display: flex;
      align-items: center;
      gap: 12px;
      flex-shrink: 0;
    }

    .ai-page-logo {
      height: 38px;
      width: auto;
      object-fit: contain;
    }

    .brand-title {
      font-size: 1.25rem;
      font-weight: 800;
      background: linear-gradient(135deg, #4f46e5 0%, #ec4899 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      letter-spacing: -0.5px;
    }

    /* 导航列表要求 gap 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: 0.92rem;
      font-weight: 600;
      color: var(--text-muted);
      border-radius: var(--radius-sm);
    }

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

    .nav-cta {
      display: flex;
      align-items: center;
      gap: 12px;
      flex-shrink: 0;
    }

    .btn-nav-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 9px 20px;
      font-size: 0.9rem;
      font-weight: 700;
      color: #ffffff;
      background: linear-gradient(135deg, #4f46e5 0%, #ec4899 100%);
      border-radius: var(--radius-full);
      box-shadow: 0 4px 14px rgba(79, 70, 229, 0.35);
    }

    .btn-nav-primary:hover {
      opacity: 0.92;
      transform: translateY(-1px);
    }

    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }

    .mobile-menu-toggle span {
      display: block;
      width: 24px;
      height: 2px;
      background-color: var(--text-main);
      margin: 5px 0;
      transition: var(--transition-base);
    }

    /* 艳彩风通用模块背景与标题 */
    .section-padding {
      padding: 80px 0;
    }

    .section-bg-alt {
      background: linear-gradient(180deg, #f8fafc 0%, #f1f5f9 100%);
    }

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

    .section-badge {
      display: inline-block;
      padding: 6px 16px;
      font-size: 0.85rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: #4f46e5;
      background: rgba(79, 70, 229, 0.1);
      border-radius: var(--radius-full);
      margin-bottom: 14px;
      border: 1px solid rgba(79, 70, 229, 0.2);
    }

    .section-title {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 14px;
    }

    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
    }

    /* Hero 首屏 (严格无图片，纯色/艳彩渐变/几何/动效卡片) */
    .hero-section {
      padding: 90px 0 80px 0;
      background: radial-gradient(circle at 80% 20%, rgba(236, 72, 153, 0.12) 0%, rgba(248, 250, 252, 0) 50%),
                  radial-gradient(circle at 10% 80%, rgba(6, 182, 212, 0.12) 0%, rgba(248, 250, 252, 0) 50%),
                  #ffffff;
      border-bottom: 1px solid var(--border-color);
      position: relative;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 40px;
      align-items: center;
    }

    .hero-badge-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: linear-gradient(90deg, rgba(236, 72, 153, 0.15) 0%, rgba(79, 70, 229, 0.15) 100%);
      color: #9333ea;
      font-size: 0.88rem;
      font-weight: 700;
      border-radius: var(--radius-full);
      margin-bottom: 20px;
      border: 1px solid rgba(147, 51, 234, 0.2);
    }

    /* H1 要求控制在20字以内 */
    .hero-title {
      font-size: 2.85rem;
      font-weight: 900;
      color: var(--text-main);
      line-height: 1.2;
      margin-bottom: 20px;
      letter-spacing: -1px;
    }

    .hero-subtitle {
      font-size: 1.15rem;
      color: var(--text-muted);
      margin-bottom: 32px;
      line-height: 1.6;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 36px;
    }

    .btn-hero-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 14px 34px;
      font-size: 1.05rem;
      font-weight: 700;
      color: #ffffff;
      background: linear-gradient(135deg, #f97316 0%, #ec4899 50%, #4f46e5 100%);
      border-radius: var(--radius-full);
      box-shadow: 0 8px 20px rgba(236, 72, 153, 0.35);
      transition: var(--transition-base);
    }

    .btn-hero-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 26px rgba(236, 72, 153, 0.45);
    }

    .btn-hero-secondary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 14px 28px;
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      background: #ffffff;
      border: 2px solid var(--border-color);
      border-radius: var(--radius-full);
    }

    .btn-hero-secondary:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: rgba(79, 70, 229, 0.04);
    }

    .hero-highlights {
      display: flex;
      gap: 24px;
      font-size: 0.92rem;
      color: var(--text-muted);
      font-weight: 600;
    }

    .hero-highlights span {
      display: flex;
      align-items: center;
      gap: 6px;
    }

    /* 首屏纯CSS控制台展示卡 (无图片) */
    .hero-card-panel {
      background: linear-gradient(145deg, #ffffff 0%, #f8fafc 100%);
      border: 2px solid #e0e7ff;
      border-radius: var(--radius-lg);
      padding: 28px;
      box-shadow: var(--shadow-lg);
      position: relative;
    }

    .panel-header-bar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-bottom: 1px solid var(--border-color);
      padding-bottom: 16px;
      margin-bottom: 20px;
    }

    .panel-dots {
      display: flex;
      gap: 8px;
    }

    .dot {
      width: 12px;
      height: 12px;
      border-radius: 50%;
    }
    .dot-red { background-color: #ef4444; }
    .dot-yellow { background-color: #f59e0b; }
    .dot-green { background-color: #10b981; }

    .panel-status-pill {
      font-size: 0.8rem;
      font-weight: 700;
      color: #059669;
      background: #d1fae5;
      padding: 3px 10px;
      border-radius: var(--radius-full);
    }

    .model-stream-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .stream-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 16px;
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid #e2e8f0;
      box-shadow: var(--shadow-sm);
    }

    .stream-meta {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .stream-icon {
      width: 36px;
      height: 36px;
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      color: #ffffff;
      font-size: 0.85rem;
    }
    .bg-grad-1 { background: linear-gradient(135deg, #6366f1, #a855f7); }
    .bg-grad-2 { background: linear-gradient(135deg, #ec4899, #f43f5e); }
    .bg-grad-3 { background: linear-gradient(135deg, #06b6d4, #3b82f6); }
    .bg-grad-4 { background: linear-gradient(135deg, #10b981, #14b8a6); }

    .stream-name {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .stream-sub {
      font-size: 0.8rem;
      color: var(--text-light);
    }

    .stream-badge {
      font-size: 0.78rem;
      font-weight: 700;
      padding: 4px 8px;
      border-radius: 6px;
      background: #ede9fe;
      color: #6d28d9;
    }

    /* 数据指标条 */
    .metrics-bar {
      margin-top: -30px;
      position: relative;
      z-index: 10;
    }

    .metrics-card-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border-color);
    }

    .metric-item {
      text-align: center;
      border-right: 1px solid var(--border-color);
      padding: 0 10px;
    }
    .metric-item:last-child {
      border-right: none;
    }

    .metric-value {
      font-size: 2.1rem;
      font-weight: 900;
      line-height: 1.1;
      margin-bottom: 6px;
    }
    .text-vibrant-1 { color: #4f46e5; }
    .text-vibrant-2 { color: #ec4899; }
    .text-vibrant-3 { color: #06b6d4; }
    .text-vibrant-4 { color: #f97316; }

    .metric-label {
      font-size: 0.88rem;
      color: var(--text-muted);
      font-weight: 600;
    }

    /* 多模型生态展示标签云 */
    .model-pills-wrap {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
      margin-top: 24px;
    }

    .model-pill {
      display: inline-flex;
      align-items: center;
      padding: 6px 14px;
      background: #ffffff;
      border: 1px solid #cbd5e1;
      border-radius: var(--radius-full);
      font-size: 0.88rem;
      font-weight: 700;
      color: var(--text-main);
      box-shadow: var(--shadow-sm);
      transition: var(--transition-base);
    }

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

    /* 服务卡片网格 */
    .cards-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .service-card {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      padding: 30px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: var(--transition-base);
      display: flex;
      flex-direction: column;
    }

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

    .card-icon-box {
      width: 52px;
      height: 52px;
      border-radius: 14px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      margin-bottom: 20px;
      flex-shrink: 0;
    }

    .service-card h3 {
      font-size: 1.25rem;
      font-weight: 800;
      margin-bottom: 12px;
      color: var(--text-main);
    }

    .service-card p {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
      margin-bottom: 16px;
    }

    .card-tag {
      font-size: 0.78rem;
      font-weight: 700;
      color: var(--primary);
      background: rgba(79, 70, 229, 0.08);
      padding: 4px 10px;
      border-radius: var(--radius-full);
      align-self: flex-start;
    }

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

    .step-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 26px 20px;
      text-align: center;
      position: relative;
      box-shadow: var(--shadow-sm);
    }

    .step-num {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, #4f46e5, #ec4899);
      color: #ffffff;
      font-size: 1.15rem;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 16px auto;
    }

    .step-item h4 {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .step-item p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 对比评测板块 */
    .eval-box {
      background: #ffffff;
      border: 2px solid #e2e8f0;
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-lg);
      margin-bottom: 30px;
    }

    .eval-header-summary {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
      padding-bottom: 24px;
      border-bottom: 2px solid var(--border-color);
      margin-bottom: 24px;
    }

    .eval-score-badge {
      display: flex;
      align-items: center;
      gap: 16px;
      background: linear-gradient(135deg, #fff1f2, #f5f3ff);
      padding: 16px 24px;
      border-radius: var(--radius-md);
      border: 1px solid #fecdd3;
    }

    .score-number {
      font-size: 2.8rem;
      font-weight: 900;
      color: #e11d48;
      line-height: 1;
    }

    .score-detail {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .rating-stars {
      color: #f59e0b;
      font-size: 1.1rem;
    }

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

    .comparison-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.95rem;
    }

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

    .comparison-table th {
      background: #f8fafc;
      font-weight: 800;
      color: var(--text-main);
    }

    .comparison-table tr:hover {
      background-color: #faf5ff;
    }

    .highlight-cell {
      font-weight: 700;
      color: #4f46e5;
      background: rgba(79, 70, 229, 0.03);
    }

    /* 案例中心 & 素材图展示 (仅在首屏后) */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

    .case-img-wrap {
      width: 100%;
      aspect-ratio: 16 / 9;
      background: #e2e8f0;
      overflow: hidden;
    }

    .case-img-wrap.square-ratio {
      aspect-ratio: 1 / 1;
    }

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

    .case-card:hover .case-img-wrap img {
      transform: scale(1.04);
    }

    .case-content {
      padding: 20px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }

    .case-content h4 {
      font-size: 1.15rem;
      font-weight: 800;
      margin-bottom: 8px;
    }

    .case-content p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.5;
      margin-bottom: 16px;
      flex-grow: 1;
    }

    /* 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-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .testimonial-quote {
      font-size: 0.95rem;
      color: var(--text-main);
      line-height: 1.6;
      margin-bottom: 20px;
      position: relative;
    }

    .user-profile {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f1f5f9;
      padding-top: 14px;
    }

    .user-avatar-initial {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      color: #ffffff;
      font-size: 1rem;
      flex-shrink: 0;
    }

    .user-info h5 {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .user-info span {
      font-size: 0.8rem;
      color: var(--text-light);
    }

    /* FAQ 折叠面板 */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

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

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

    .faq-question:hover {
      color: var(--primary);
      background-color: #faf5ff;
    }

    .faq-arrow {
      font-size: 1.2rem;
      transition: transform 0.3s ease;
      color: var(--primary-vibrant);
    }

    .faq-answer {
      padding: 0 24px 20px 24px;
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.6;
      display: none;
      border-top: 1px solid #f1f5f9;
      padding-top: 16px;
    }

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

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

    /* 需求匹配与表单板块 */
    .contact-form-grid {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 40px;
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-lg);
      padding: 40px;
    }

    .contact-sidebar {
      display: flex;
      flex-direction: column;
      gap: 24px;
      border-right: 1px solid var(--border-color);
      padding-right: 30px;
    }

    .qr-box {
      background: #f8fafc;
      padding: 20px;
      border-radius: var(--radius-md);
      border: 1px dashed #cbd5e1;
      text-align: center;
    }

    .qr-box img {
      width: 150px;
      height: 150px;
      margin: 0 auto 12px auto;
      border-radius: 8px;
    }

    .info-item {
      display: flex;
      flex-direction: column;
      gap: 4px;
    }

    .info-label {
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--text-light);
    }

    .info-value {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
    }

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

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

    .form-control {
      width: 100%;
      padding: 12px 16px;
      font-size: 0.95rem;
      color: var(--text-main);
      background: #f8fafc;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      outline: none;
      transition: var(--transition-base);
    }

    .form-control:focus {
      border-color: var(--primary);
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
    }

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

    .btn-submit {
      width: 100%;
      padding: 14px;
      font-size: 1.05rem;
      font-weight: 800;
      color: #ffffff;
      background: linear-gradient(135deg, #4f46e5 0%, #ec4899 100%);
      border: none;
      border-radius: var(--radius-md);
      cursor: pointer;
      box-shadow: 0 6px 18px rgba(79, 70, 229, 0.3);
      transition: var(--transition-base);
    }

    .btn-submit:hover {
      opacity: 0.94;
      transform: translateY(-2px);
    }

    /* 文章与资讯 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

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

    .news-card h4 {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }

    .news-date {
      font-size: 0.8rem;
      color: var(--text-light);
      margin-bottom: 12px;
    }

    /* 页脚标准体系 (显式指定深色底浅色字) */
    .site-footer {
      background-color: #0f172a;
      color: #94a3b8;
      padding: 60px 0 30px 0;
      border-top: 1px solid #1e293b;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 36px;
      margin-bottom: 40px;
    }

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

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

    .footer-links-list a {
      color: #94a3b8;
      font-size: 0.9rem;
    }

    .footer-links-list a:hover {
      color: #ec4899;
    }

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

    .friend-links-wrap a {
      color: #cbd5e1;
      font-size: 0.88rem;
      background: #1e293b;
      padding: 4px 10px;
      border-radius: 4px;
    }

    .friend-links-wrap a:hover {
      color: #ffffff;
      background: #334155;
    }

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      text-align: center;
      font-size: 0.85rem;
      color: #64748b;
    }

    /* 悬浮客服挂件 */
    .float-service-widget {
      position: fixed;
      right: 20px;
      bottom: 40px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .float-btn {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background: linear-gradient(135deg, #4f46e5, #ec4899);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 16px rgba(0,0,0,0.25);
      cursor: pointer;
      font-weight: 800;
      font-size: 1.1rem;
      transition: var(--transition-base);
      border: none;
    }

    .float-btn:hover {
      transform: scale(1.08);
    }

    .qr-popup {
      position: absolute;
      right: 60px;
      bottom: 0;
      width: 170px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-lg);
      padding: 14px;
      text-align: center;
      display: none;
      color: var(--text-main);
      font-size: 0.8rem;
    }

    .float-service-widget:hover .qr-popup {
      display: block;
    }

    /* 响应式适配 */
    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .metrics-card-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
      }
      .metric-item:nth-child(2) {
        border-right: none;
      }
      .cards-grid, .case-grid, .testimonials-grid, .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .step-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .contact-form-grid {
        grid-template-columns: 1fr;
      }
      .contact-sidebar {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        padding-right: 0;
        padding-bottom: 24px;
      }
    }

    @media (max-width: 768px) {
      .nav-links, .nav-cta {
        display: none;
      }
      .nav-links.mobile-open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        border-bottom: 1px solid var(--border-color);
        padding: 16px 20px;
        box-shadow: var(--shadow-lg);
      }
      .nav-links.mobile-open li {
        width: 100%;
      }
      .nav-links.mobile-open li a {
        display: block;
        padding: 10px 14px;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .hero-title {
        font-size: 2.1rem;
      }
      .section-title {
        font-size: 1.75rem;
      }
      .cards-grid, .case-grid, .testimonials-grid, .news-grid, .step-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .metrics-card-grid {
        grid-template-columns: 1fr;
      }
      .metric-item {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        padding-bottom: 12px;
      }
      .metric-item:last-child {
        border-bottom: none;
      }
      .contact-form-grid {
        padding: 20px;
      }
    }