:root {
      --primary: #059669;
      --primary-hover: #047857;
      --primary-light: #ecfdf5;
      --primary-glow: rgba(16, 185, 129, 0.2);
      --accent: #10b981;
      --accent-bright: #34d399;
      --dark-text: #0f172a;
      --body-text: #334155;
      --muted-text: #64748b;
      --bg-page: #f6fcf8;
      --card-bg: #ffffff;
      --border-color: #e2e8f0;
      --border-green: #a7f3d0;
      --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.04);
      --shadow-md: 0 10px 25px -5px rgba(5, 150, 105, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
      --shadow-lg: 0 20px 30px -10px rgba(5, 150, 105, 0.15);
      --radius: 12px;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-tap-highlight-color: transparent;
    }

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-page);
      color: var(--body-text);
      line-height: 1.6;
      background-image: 
        radial-gradient(at 10% 10%, rgba(16, 185, 129, 0.05) 0px, transparent 40%),
        radial-gradient(at 90% 90%, rgba(5, 150, 105, 0.04) 0px, transparent 40%);
      background-attachment: fixed;
    }

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

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

    .container {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

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

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

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

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

    .brand-meta {
      display: flex;
      flex-direction: column;
    }

    .brand-title {
      font-size: 20px;
      font-weight: 800;
      color: var(--dark-text);
      letter-spacing: -0.5px;
    }

    .brand-tagline {
      font-size: 11px;
      color: var(--primary);
      font-weight: 600;
    }

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

    .nav-links li a {
      display: block;
      padding: 8px 14px;
      font-size: 14px;
      font-weight: 500;
      color: var(--body-text);
      border-radius: 6px;
      transition: color 0.2s ease, background 0.2s ease;
    }

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

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

    .btn-nav-primary {
      padding: 9px 18px;
      background: linear-gradient(135deg, var(--accent) 0%, var(--primary) 100%);
      color: #ffffff !important;
      border-radius: 8px;
      font-size: 13px;
      font-weight: 600;
      box-shadow: 0 4px 10px rgba(5, 150, 105, 0.25);
    }

    .btn-nav-primary:hover {
      box-shadow: 0 6px 14px rgba(5, 150, 105, 0.35);
      transform: translateY(-1px);
    }

    .mobile-menu-toggle {
      display: none;
      background: none;
      border: 1px solid var(--border-color);
      border-radius: 6px;
      padding: 8px;
      cursor: pointer;
    }

    .mobile-menu-toggle span {
      display: block;
      width: 22px;
      height: 2px;
      background: var(--dark-text);
      margin: 4px 0;
      transition: 0.3s;
    }

    /* 区域通用样式 */
    .section-block {
      padding: 70px 0;
      position: relative;
    }

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

    .section-badge {
      display: inline-block;
      font-size: 12px;
      font-weight: 700;
      color: var(--primary);
      background: var(--primary-light);
      border: 1px solid var(--border-green);
      padding: 4px 14px;
      border-radius: 50px;
      margin-bottom: 12px;
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--dark-text);
      line-height: 1.3;
      margin-bottom: 14px;
    }

    .section-desc {
      font-size: 15px;
      color: var(--muted-text);
      line-height: 1.6;
    }

    /* Hero 首屏 - 严格纯代码无图片 */
    .hero-section {
      padding: 80px 0 60px;
      background: linear-gradient(180deg, #ffffff 0%, rgba(236, 253, 245, 0.6) 100%);
      border-bottom: 1px solid var(--border-green);
      position: relative;
      overflow: hidden;
    }

    .hero-glow-1 {
      position: absolute;
      width: 500px;
      height: 500px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(16, 185, 129, 0.15) 0%, transparent 70%);
      top: -150px;
      left: 50%;
      transform: translateX(-50%);
      pointer-events: none;
    }

    .hero-content {
      text-align: center;
      max-width: 880px;
      margin: 0 auto;
      position: relative;
      z-index: 2;
    }

    .hero-eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      background: #ffffff;
      border: 1px solid var(--border-green);
      border-radius: 30px;
      font-size: 13px;
      font-weight: 600;
      color: var(--primary);
      margin-bottom: 24px;
      box-shadow: 0 4px 12px rgba(5, 150, 105, 0.08);
    }

    .hero-eyebrow-dot {
      width: 8px;
      height: 8px;
      background: var(--accent);
      border-radius: 50%;
      box-shadow: 0 0 0 4px var(--primary-light);
    }

    .hero-title {
      font-size: 44px;
      line-height: 1.25;
      font-weight: 900;
      color: var(--dark-text);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-title span {
      color: var(--primary);
      background: linear-gradient(120deg, #059669 0%, #10b981 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-subtitle {
      font-size: 17px;
      line-height: 1.7;
      color: var(--body-text);
      margin-bottom: 36px;
      max-width: 740px;
      margin-left: auto;
      margin-right: auto;
    }

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

    .btn-main-official {
      padding: 14px 34px;
      background: linear-gradient(135deg, #059669 0%, #10b981 100%);
      color: #ffffff;
      font-size: 16px;
      font-weight: 700;
      border-radius: 10px;
      box-shadow: 0 8px 20px rgba(5, 150, 105, 0.3);
      display: inline-flex;
      align-items: center;
      gap: 10px;
    }

    .btn-main-official:hover {
      background: linear-gradient(135deg, #047857 0%, #059669 100%);
      box-shadow: 0 10px 25px rgba(5, 150, 105, 0.4);
      transform: translateY(-2px);
    }

    .btn-secondary {
      padding: 14px 28px;
      background: #ffffff;
      color: var(--dark-text);
      font-size: 16px;
      font-weight: 600;
      border-radius: 10px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .btn-secondary:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: var(--primary-light);
    }

    .hero-stats {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 20px;
    }

    .stat-card {
      background: #ffffff;
      border: 1px solid var(--border-green);
      padding: 20px;
      border-radius: var(--radius);
      box-shadow: var(--shadow-sm);
      text-align: center;
    }

    .stat-number {
      font-size: 28px;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
      font-family: inherit;
    }

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

    /* 平台核心矩阵 */
    .model-pills-wrap {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      margin-top: -30px;
      position: relative;
      z-index: 10;
    }

    .model-pills-title {
      font-size: 13px;
      font-weight: 700;
      color: var(--muted-text);
      text-transform: uppercase;
      margin-bottom: 14px;
      text-align: center;
      letter-spacing: 1px;
    }

    .model-pills {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      justify-content: center;
    }

    .model-pill {
      font-size: 12px;
      font-weight: 600;
      background: var(--primary-light);
      color: var(--primary);
      border: 1px solid var(--border-green);
      padding: 5px 12px;
      border-radius: 20px;
      transition: all 0.2s ease;
    }

    .model-pill:hover {
      background: var(--primary);
      color: #ffffff;
      transform: translateY(-2px);
    }

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

    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
    }

    .feature-card {
      background: var(--card-bg);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
    }

    .feature-card:hover {
      border-color: var(--accent);
      box-shadow: var(--shadow-md);
      transform: translateY(-3px);
    }

    .feature-icon-box {
      width: 46px;
      height: 46px;
      border-radius: 10px;
      background: var(--primary-light);
      border: 1px solid var(--border-green);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 18px;
      color: var(--primary);
    }

    .feature-icon-box svg {
      width: 24px;
      height: 24px;
      stroke-width: 2;
    }

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

    .feature-card p {
      font-size: 14px;
      color: var(--body-text);
      line-height: 1.6;
      flex-grow: 1;
    }

    /* 行业方案与物料图文 */
    .media-card-showcase {
      background: #ffffff;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }

    .media-thumb-box {
      width: 100%;
      aspect-ratio: 16 / 9;
      background: #f1f5f9;
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .media-thumb-box.square-box {
      aspect-ratio: 1 / 1;
    }

    .media-thumb-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }

    .media-card-showcase:hover .media-thumb-box img {
      transform: scale(1.03);
    }

    .media-card-body {
      padding: 22px;
    }

    .media-card-body h4 {
      font-size: 17px;
      font-weight: 700;
      color: var(--dark-text);
      margin-bottom: 8px;
    }

    .media-card-body p {
      font-size: 13px;
      color: var(--muted-text);
      line-height: 1.6;
    }

    /* 对比评测高亮板块 */
    .evaluation-panel {
      background: linear-gradient(135deg, #f0fdf4 0%, #ffffff 100%);
      border: 2px solid var(--border-green);
      border-radius: var(--radius);
      padding: 36px;
      box-shadow: var(--shadow-md);
      margin-bottom: 40px;
    }

    .eval-score-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
      padding-bottom: 24px;
      border-bottom: 1px solid var(--border-green);
      margin-bottom: 28px;
    }

    .eval-badge-group {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .eval-stars {
      color: #eab308;
      font-size: 20px;
      letter-spacing: 2px;
    }

    .eval-score-num {
      font-size: 38px;
      font-weight: 900;
      color: var(--primary);
      line-height: 1;
    }

    .eval-score-num span {
      font-size: 18px;
      color: var(--muted-text);
      font-weight: 500;
    }

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

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

    .compare-table th, .compare-table td {
      padding: 16px 20px;
      font-size: 14px;
      border-bottom: 1px solid var(--border-color);
    }

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

    .compare-table tr:hover td {
      background: rgba(236, 253, 245, 0.4);
    }

    .highlight-col {
      background: var(--primary-light);
      font-weight: 700;
      color: var(--primary);
    }

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

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

    .step-number {
      width: 36px;
      height: 36px;
      background: var(--primary);
      color: #ffffff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 16px;
      margin: 0 auto 16px;
    }

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

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

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

    .testimonial-text {
      font-size: 14px;
      line-height: 1.7;
      color: var(--body-text);
      margin-bottom: 18px;
      position: relative;
    }

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

    .user-avatar-initial {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary);
      font-weight: 800;
      font-size: 15px;
      display: flex;
      align-items: center;
      justify-content: center;
      border: 1px solid var(--border-green);
    }

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

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

    /* FAQ 手风琴 */
    .faq-wrapper {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

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

    .faq-item.active {
      border-color: var(--accent);
    }

    .faq-question {
      width: 100%;
      padding: 18px 22px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: none;
      border: none;
      text-align: left;
      font-size: 15px;
      font-weight: 700;
      color: var(--dark-text);
      cursor: pointer;
    }

    .faq-icon {
      font-size: 18px;
      color: var(--primary);
      transition: transform 0.2s ease;
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out;
      background: #fafdfc;
    }

    .faq-answer-inner {
      padding: 0 22px 18px;
      font-size: 14px;
      line-height: 1.7;
      color: var(--body-text);
    }

    /* 需求匹配与表单 */
    .form-panel-wrapper {
      background: #ffffff;
      border: 1px solid var(--border-green);
      border-radius: var(--radius);
      padding: 36px;
      box-shadow: var(--shadow-md);
    }

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

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

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      font-size: 14px;
      color: var(--dark-text);
      outline: none;
      transition: border-color 0.2s ease;
      background: #fcfdfd;
    }

    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px var(--primary-glow);
    }

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

    .btn-submit {
      width: 100%;
      padding: 14px;
      background: linear-gradient(135deg, var(--accent) 0%, var(--primary) 100%);
      color: #ffffff;
      border: none;
      border-radius: 8px;
      font-size: 16px;
      font-weight: 700;
      cursor: pointer;
      box-shadow: 0 4px 12px rgba(5, 150, 105, 0.3);
      transition: all 0.2s ease;
    }

    .btn-submit:hover {
      opacity: 0.95;
      transform: translateY(-1px);
    }

    /* 宣传图展示栏 */
    .banner-gallery-row {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      margin-top: 30px;
    }

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

    .banner-gallery-card img {
      width: 100%;
      height: 200px;
      object-fit: cover;
    }

    /* 资讯与友情链接 */
    .article-link-list {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 16px;
    }

    .article-item-link {
      padding: 8px 16px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 6px;
      font-size: 13px;
      color: var(--body-text);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

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

    .friendly-link-container {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 14px;
    }

    .friendly-link-container a {
      font-size: 13px;
      color: var(--muted-text);
      padding: 4px 10px;
      background: #f1f5f9;
      border-radius: 4px;
    }

    .friendly-link-container a:hover {
      color: var(--primary);
      background: var(--primary-light);
    }

    /* 页脚 */
    .site-footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 60px 0 30px;
      border-top: 4px solid var(--primary);
      font-size: 14px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.2fr;
      gap: 36px;
      margin-bottom: 40px;
    }

    .footer-col h4 {
      color: #f8fafc;
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 18px;
    }

    .footer-col p {
      line-height: 1.8;
      margin-bottom: 12px;
    }

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

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

    .footer-links li a {
      color: #94a3b8;
    }

    .footer-links li a:hover {
      color: var(--accent-bright);
    }

    .footer-qr-wrap {
      display: inline-block;
      padding: 8px;
      background: #ffffff;
      border-radius: 8px;
      margin-top: 8px;
    }

    .footer-qr-wrap img {
      width: 100px;
      height: 100px;
      display: block;
    }

    .footer-bottom {
      text-align: center;
      padding-top: 24px;
      border-top: 1px solid #1e293b;
      font-size: 13px;
    }

    /* 浮动客服挂件 */
    .float-service-widget {
      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: var(--primary);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: var(--shadow-lg);
      cursor: pointer;
      position: relative;
    }

    .float-btn:hover {
      background: var(--primary-hover);
    }

    .float-qr-popup {
      position: absolute;
      right: 56px;
      bottom: 0;
      background: #ffffff;
      padding: 12px;
      border-radius: 8px;
      box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
      border: 1px solid var(--border-green);
      display: none;
      width: 140px;
      text-align: center;
    }

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

    .float-qr-popup span {
      font-size: 11px;
      color: var(--dark-text);
      font-weight: 600;
    }

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

    /* 响应式样式适配 */
    @media (max-width: 992px) {
      .hero-title { font-size: 34px; }
      .grid-4, .hero-stats, .process-steps { grid-template-columns: repeat(2, 1fr); }
      .grid-3, .banner-gallery-row { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: repeat(2, 1fr); }
      .nav-links { display: none; }
      .mobile-menu-toggle { display: block; }
      .nav-links.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.active li { width: 100%; }
      .nav-links.active li a { padding: 12px; }
    }

    @media (max-width: 640px) {
      .section-block { padding: 48px 0; }
      .hero-title { font-size: 26px; }
      .hero-subtitle { font-size: 14px; }
      .hero-stats, .grid-3, .grid-4, .process-steps, .banner-gallery-row { grid-template-columns: 1fr; }
      .grid-2 { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
      .btn-main-official, .btn-secondary { width: 100%; justify-content: center; }
    }