:root {
      --primary: #2563eb;
      --primary-hover: #1d4ed8;
      --accent: #f97316;
      --accent-hover: #ea580c;
      --dark: #0f172a;
      --text: #334155;
      --light-text: #64748b;
      --bg: #f8fafc;
      --card-bg: #ffffff;
      --border: #e2e8f0;
      --highlight: #eff6ff;
      --radius: 12px;
      --shadow: 0 10px 25px -5px rgba(15, 23, 42, 0.05), 0 8px 10px -6px rgba(15, 23, 42, 0.05);
      --shadow-lg: 0 20px 25px -5px rgba(37, 99, 235, 0.1), 0 8px 10px -6px rgba(37, 99, 235, 0.1);
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-font-smoothing: antialiased;
    }

    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);
      color: var(--text);
      line-height: 1.6;
      position: relative;
    }

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

    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

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

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

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      max-height: 48px;
    }

    .brand-logo img {
      max-height: 44px;
      width: auto;
      display: block;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }

    .nav-links li a {
      font-size: 15px;
      font-weight: 500;
      color: var(--dark);
      padding: 8px 14px;
      border-radius: 6px;
      display: inline-block;
    }

    .nav-links li a:hover {
      color: var(--primary);
      background: var(--highlight);
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 15px;
      font-weight: 600;
      border-radius: 8px;
      border: 1px solid transparent;
      cursor: pointer;
      transition: all 0.25s ease;
      text-align: center;
    }

    .btn-primary {
      background-color: var(--primary);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(37, 99, 235, 0.25);
    }

    .btn-primary:hover {
      background-color: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(37, 99, 235, 0.35);
    }

    .btn-accent {
      background-color: var(--accent);
      color: #ffffff;
    }

    .btn-accent:hover {
      background-color: var(--accent-hover);
      transform: translateY(-2px);
    }

    .btn-outline {
      border-color: var(--primary);
      color: var(--primary);
      background: #ffffff;
    }

    .btn-outline:hover {
      background: var(--highlight);
      transform: translateY(-2px);
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--dark);
      cursor: pointer;
      padding: 4px;
    }

    /* 首屏纯文字与几何元素 - 严禁图片 */
    .hero-section {
      background: radial-gradient(circle at 80% 20%, #e0e7ff 0%, #f0fdf4 40%, #f8fafc 100%);
      padding: 90px 0 70px;
      position: relative;
      overflow: hidden;
      border-bottom: 1px solid var(--border);
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 40px;
      align-items: center;
    }

    .hero-content .badge {
      display: inline-flex;
      align-items: center;
      background: #e0f2fe;
      color: #0369a1;
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 20px;
      border: 1px solid #bae6fd;
    }

    .hero-title {
      font-size: 40px;
      line-height: 1.25;
      font-weight: 800;
      color: var(--dark);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-title span {
      color: var(--primary);
    }

    .hero-desc {
      font-size: 17px;
      color: var(--light-text);
      margin-bottom: 32px;
      line-height: 1.7;
    }

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

    .hero-features {
      display: flex;
      gap: 24px;
      padding-top: 24px;
      border-top: 1px solid var(--border);
    }

    .hero-feature-item {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 14px;
      font-weight: 500;
      color: var(--dark);
    }

    .hero-feature-item svg {
      width: 18px;
      height: 18px;
      fill: var(--primary);
    }

    .hero-visual-card {
      background: #ffffff;
      border: 1px solid var(--border);
      border-radius: 16px;
      padding: 30px;
      box-shadow: var(--shadow);
      position: relative;
    }

    .terminal-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 20px;
      padding-bottom: 12px;
      border-bottom: 1px solid var(--border);
    }

    .terminal-dots {
      display: flex;
      gap: 6px;
    }

    .terminal-dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
    }

    .dot-red { background: #ef4444; }
    .dot-yellow { background: #f59e0b; }
    .dot-green { background: #10b981; }

    .matrix-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-bottom: 24px;
    }

    .matrix-tag {
      font-size: 12px;
      background: #f1f5f9;
      color: #475569;
      padding: 4px 10px;
      border-radius: 6px;
      font-family: monospace;
      font-weight: 600;
    }

    .flow-step-box {
      background: var(--highlight);
      border-left: 4px solid var(--primary);
      padding: 14px 16px;
      border-radius: 0 8px 8px 0;
      margin-bottom: 12px;
    }

    .flow-step-box h4 {
      font-size: 14px;
      color: var(--dark);
      margin-bottom: 4px;
    }

    .flow-step-box p {
      font-size: 13px;
      color: var(--light-text);
      line-height: 1.4;
    }

    /* 区域通用样式 */
    section {
      padding: 80px 0;
      position: relative;
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 56px;
    }

    .section-tag {
      display: inline-block;
      font-size: 13px;
      font-weight: 700;
      color: var(--primary);
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 10px;
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--dark);
      margin-bottom: 16px;
      line-height: 1.3;
    }

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

    /* 数据指标条 */
    .metric-strip {
      background: #ffffff;
      border-bottom: 1px solid var(--border);
      padding: 40px 0;
    }

    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }

    .metric-card {
      padding: 16px;
    }

    .metric-value {
      font-size: 38px;
      font-weight: 800;
      color: var(--primary);
      line-height: 1;
      margin-bottom: 8px;
    }

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

    /* 服务卡片网格 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .service-card {
      background: #ffffff;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 30px;
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
      position: relative;
    }

    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow);
      border-color: #cbd5e1;
    }

    .service-icon-box {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: var(--highlight);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
    }

    .service-icon-box svg {
      width: 24px;
      height: 24px;
      fill: currentColor;
    }

    .service-title {
      font-size: 18px;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 12px;
    }

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

    /* 行业方案展示与视觉素材 */
    .showcase-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
      margin-top: 40px;
    }

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

    .showcase-media {
      width: 100%;
      background: #f1f5f9;
      position: relative;
      aspect-ratio: 16 / 9;
    }

    .showcase-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }

    .showcase-content {
      padding: 24px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

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

    .showcase-desc {
      font-size: 14px;
      color: var(--light-text);
      line-height: 1.6;
      margin-bottom: 16px;
    }

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

    .showcase-tag {
      font-size: 12px;
      color: var(--primary);
      background: var(--highlight);
      padding: 4px 10px;
      border-radius: 4px;
    }

    /* 对比评测表格 */
    .compare-section {
      background: #ffffff;
      border-top: 1px solid var(--border);
      border-bottom: 1px solid var(--border);
    }

    .score-banner {
      background: linear-gradient(135deg, #1e293b, #0f172a);
      color: #ffffff;
      border-radius: var(--radius);
      padding: 32px 40px;
      margin-bottom: 40px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 24px;
    }

    .score-left h3 {
      font-size: 22px;
      margin-bottom: 8px;
    }

    .score-left p {
      font-size: 14px;
      color: #94a3b8;
    }

    .score-right {
      display: flex;
      align-items: center;
      gap: 24px;
    }

    .score-number {
      font-size: 48px;
      font-weight: 900;
      color: #38bdf8;
      line-height: 1;
    }

    .score-stars {
      color: #f59e0b;
      font-size: 20px;
      margin-bottom: 4px;
    }

    .score-total {
      font-size: 13px;
      color: #cbd5e1;
    }

    .table-responsive {
      width: 100%;
      overflow-x: auto;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      background: #ffffff;
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
    }

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

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

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

    .highlight-cell {
      background: #eff6ff;
      color: var(--primary);
      font-weight: 600;
    }

    /* 流程时间线 */
    .timeline-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
    }

    .timeline-step {
      background: #ffffff;
      border: 1px solid var(--border);
      padding: 24px;
      border-radius: var(--radius);
      position: relative;
    }

    .step-number {
      width: 32px;
      height: 32px;
      background: var(--primary);
      color: #ffffff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 14px;
      margin-bottom: 16px;
    }

    .timeline-step h4 {
      font-size: 16px;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 8px;
    }

    .timeline-step p {
      font-size: 13px;
      color: var(--light-text);
      line-height: 1.5;
    }

    /* 用户评论 */
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .testimonial-card {
      background: #ffffff;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 28px;
      box-shadow: var(--shadow);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .testimonial-quote {
      font-size: 14px;
      color: #475569;
      line-height: 1.6;
      margin-bottom: 20px;
    }

    .testimonial-author {
      display: flex;
      align-items: center;
      gap: 12px;
      padding-top: 16px;
      border-top: 1px solid #f1f5f9;
    }

    .author-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: #e2e8f0;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--primary);
      font-size: 14px;
    }

    .author-info h5 {
      font-size: 14px;
      color: var(--dark);
      font-weight: 700;
    }

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

    /* FAQ 展开手风琴 */
    .faq-wrapper {
      max-width: 860px;
      margin: 0 auto;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border);
      border-radius: 8px;
      margin-bottom: 12px;
      overflow: hidden;
      transition: all 0.2s ease;
    }

    .faq-question {
      padding: 18px 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      cursor: pointer;
      font-size: 16px;
      font-weight: 600;
      color: var(--dark);
      user-select: none;
    }

    .faq-question svg {
      width: 16px;
      height: 16px;
      transition: transform 0.3s ease;
      fill: var(--light-text);
      flex-shrink: 0;
    }

    .faq-item.active .faq-question svg {
      transform: rotate(180deg);
      fill: var(--primary);
    }

    .faq-answer {
      padding: 0 24px 20px;
      font-size: 14px;
      color: var(--light-text);
      line-height: 1.6;
      display: none;
    }

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

    /* 需求表单与联系 */
    .contact-container {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 40px;
      background: #ffffff;
      border: 1px solid var(--border);
      border-radius: 16px;
      padding: 40px;
      box-shadow: var(--shadow);
    }

    .contact-info h3 {
      font-size: 24px;
      color: var(--dark);
      margin-bottom: 16px;
    }

    .contact-info p {
      font-size: 14px;
      color: var(--light-text);
      line-height: 1.6;
      margin-bottom: 24px;
    }

    .contact-details-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 16px;
      margin-bottom: 30px;
    }

    .contact-details-item {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 14px;
      color: var(--dark);
    }

    .contact-details-item svg {
      width: 20px;
      height: 20px;
      fill: var(--primary);
    }

    .qr-box {
      display: flex;
      align-items: center;
      gap: 16px;
      background: #f8fafc;
      padding: 16px;
      border-radius: 8px;
      border: 1px solid var(--border);
    }

    .qr-box img {
      width: 80px;
      height: 80px;
      display: block;
      border-radius: 4px;
    }

    .qr-text h6 {
      font-size: 14px;
      color: var(--dark);
      margin-bottom: 4px;
    }

    .qr-text p {
      font-size: 12px;
      color: var(--light-text);
      margin: 0;
    }

    .contact-form {
      display: flex;
      flex-direction: column;
      gap: 18px;
    }

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

    .form-group label {
      font-size: 13px;
      font-weight: 600;
      color: var(--dark);
    }

    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border);
      border-radius: 6px;
      font-size: 14px;
      outline: none;
      transition: border-color 0.2s;
    }

    .form-control:focus {
      border-color: var(--primary);
    }

    textarea.form-control {
      min-height: 100px;
      resize: vertical;
    }

    /* 文章及外链资源 */
    .article-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 20px;
    }

    .article-item {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: #ffffff;
      border: 1px solid var(--border);
      padding: 8px 14px;
      border-radius: 6px;
      font-size: 13px;
      color: var(--dark);
    }

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

    /* 页脚 */
    footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 60px 0 30px;
      border-top: 1px solid #1e293b;
    }

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

    .footer-col h5 {
      color: #ffffff;
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 16px;
    }

    .footer-col p {
      font-size: 13px;
      line-height: 1.6;
      margin-bottom: 16px;
    }

    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
      font-size: 13px;
    }

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

    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      font-size: 13px;
    }

    .friend-links a {
      color: #94a3b8;
      background: #1e293b;
      padding: 4px 10px;
      border-radius: 4px;
    }

    .friend-links a:hover {
      color: #38bdf8;
      background: #334155;
    }

    .footer-bottom {
      padding-top: 24px;
      border-top: 1px solid #1e293b;
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 13px;
      flex-wrap: wrap;
      gap: 16px;
    }

    /* 浮动侧边组件 */
    .floating-tools {
      position: fixed;
      right: 20px;
      bottom: 40px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .tool-btn {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #ffffff;
      color: var(--dark);
      border: 1px solid var(--border);
      box-shadow: 0 4px 12px rgba(0,0,0,0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      transition: all 0.2s ease;
      position: relative;
    }

    .tool-btn:hover {
      background: var(--primary);
      color: #ffffff;
      border-color: var(--primary);
    }

    .tool-btn svg {
      width: 20px;
      height: 20px;
      fill: currentColor;
    }

    .tool-btn .hover-qr {
      position: absolute;
      right: 56px;
      bottom: 0;
      background: #ffffff;
      padding: 10px;
      border-radius: 8px;
      border: 1px solid var(--border);
      box-shadow: var(--shadow);
      display: none;
      width: 130px;
      text-align: center;
    }

    .tool-btn .hover-qr img {
      width: 100%;
      height: auto;
      display: block;
      margin-bottom: 6px;
    }

    .tool-btn .hover-qr span {
      font-size: 11px;
      color: var(--dark);
    }

    .tool-btn:hover .hover-qr {
      display: block;
    }

    /* 响应式样式适配 */
    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .services-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .timeline-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-top {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 76px;
        left: 0;
        width: 100%;
        background: #ffffff;
        padding: 20px 24px;
        border-bottom: 1px solid var(--border);
        box-shadow: var(--shadow);
      }

      .nav-links.active {
        display: flex;
      }

      .menu-toggle {
        display: block;
      }

      .hero-title {
        font-size: 30px;
      }

      .services-grid, .showcase-grid, .testimonials-grid {
        grid-template-columns: 1fr;
      }

      .contact-container {
        grid-template-columns: 1fr;
        padding: 24px;
      }

      .footer-top {
        grid-template-columns: 1fr;
      }

      .timeline-grid {
        grid-template-columns: 1fr;
      }
    }