/* roulang page: index */
:root {
      --primary: #1E40AF;
      --primary-hover: #1D4ED8;
      --primary-light: #EFF6FF;
      --accent: #0EA5E9;
      --warning: #F97316;
      --bg-main: #F8FAFC;
      --bg-card: #FFFFFF;
      --bg-dark: #0F172A;
      --text-dark: #0F172A;
      --text-body: #475569;
      --text-muted: #94A3B8;
      --border-color: #E2E8F0;
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --radius-full: 9999px;
      --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
      --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.07), 0 4px 6px -4px rgba(0, 0, 0, 0.05);
      --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
      --container-max: 1200px;
    }

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

    html {
      scroll-behavior: smooth;
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-body);
      line-height: 1.7;
    }

    body {
      overflow-x: hidden;
      min-width: 320px;
    }

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

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

    /* 容器规范 */
    .container {
      width: 100%;
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 按钮与交互元素 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 12px 28px;
      font-size: 15px;
      font-weight: 600;
      border-radius: var(--radius-full);
      cursor: pointer;
      border: 1px solid transparent;
      transition: all 0.25s ease;
      line-height: 1;
    }

    .btn-primary {
      background-color: var(--primary);
      color: #FFFFFF;
      box-shadow: 0 4px 14px rgba(30, 64, 175, 0.35);
    }

    .btn-primary:hover {
      background-color: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(30, 64, 175, 0.45);
    }

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

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

    .btn-dark {
      background-color: #0F172A;
      color: #FFFFFF;
    }

    .btn-dark:hover {
      background-color: #1E293B;
    }

    /* 标签与徽章 */
    .badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 6px 14px;
      border-radius: var(--radius-full);
      font-size: 13px;
      font-weight: 600;
    }

    .badge-blue {
      background-color: var(--primary-light);
      color: var(--primary);
      border: 1px solid rgba(30, 64, 175, 0.15);
    }

    .badge-accent {
      background-color: rgba(14, 165, 233, 0.1);
      color: var(--accent);
      border: 1px solid rgba(14, 165, 233, 0.2);
    }

    /* 顶部悬浮胶囊导航 */
    .nav-wrapper {
      position: fixed;
      top: 16px;
      left: 0;
      right: 0;
      z-index: 100;
      display: flex;
      justify-content: center;
      padding: 0 20px;
    }

    .nav-capsule {
      width: 100%;
      max-width: 1100px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 8px 18px;
      background: rgba(255, 255, 255, 0.88);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border: 1px solid rgba(226, 232, 240, 0.8);
      border-radius: var(--radius-full);
      box-shadow: 0 10px 25px -5px rgba(15, 23, 42, 0.08);
    }

    .nav-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 17px;
      font-weight: 800;
      color: var(--text-dark);
      letter-spacing: -0.02em;
    }

    .nav-logo-icon {
      width: 32px;
      height: 32px;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #FFF;
      font-size: 14px;
    }

    .nav-menu {
      display: flex;
      align-items: center;
      gap: 22px;
      list-style: none;
    }

    .nav-link {
      font-size: 14px;
      font-weight: 500;
      color: var(--text-body);
      padding: 6px 2px;
    }

    .nav-link:hover {
      color: var(--primary);
    }

    .nav-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 20px;
      color: var(--text-dark);
      cursor: pointer;
    }

    /* 通用板块基础 */
    section {
      padding: 88px 0;
      position: relative;
    }

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

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-dark);
      letter-spacing: -0.02em;
      margin-top: 12px;
      margin-bottom: 16px;
    }

    .section-desc {
      font-size: 16px;
      color: var(--text-body);
      line-height: 1.7;
    }

    /* 1. Hero 板块 */
    .hero-section {
      padding-top: 150px;
      padding-bottom: 96px;
      background: radial-gradient(circle at 50% 20%, rgba(239, 246, 255, 0.7) 0%, rgba(248, 250, 252, 1) 70%);
      overflow: hidden;
    }

    .hero-content {
      max-width: 860px;
      margin: 0 auto;
      text-align: center;
    }

    .hero-h1 {
      font-size: 46px;
      font-weight: 900;
      color: var(--text-dark);
      line-height: 1.25;
      letter-spacing: -0.03em;
      margin: 20px 0 24px 0;
    }

    .hero-h1 span {
      background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-p {
      font-size: 17px;
      color: var(--text-body);
      line-height: 1.8;
      margin-bottom: 36px;
      max-width: 780px;
      margin-left: auto;
      margin-right: auto;
    }

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

    .hero-showcase {
      margin-top: 40px;
      border-radius: var(--radius-lg);
      border: 1px solid rgba(226, 232, 240, 0.8);
      box-shadow: var(--shadow-lg);
      overflow: hidden;
      background: #FFFFFF;
      position: relative;
    }

    .hero-showcase img {
      width: 100%;
      height: auto;
      object-fit: cover;
    }

    /* 2. 卖点三连透视区 */
    .strengths-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .strength-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px 28px;
      box-shadow: var(--shadow-sm);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
    }

    .strength-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: #CBD5E1;
    }

    .strength-icon {
      width: 48px;
      height: 48px;
      background: var(--primary-light);
      color: var(--primary);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      margin-bottom: 20px;
    }

    .strength-title {
      font-size: 20px;
      font-weight: 700;
      color: var(--text-dark);
      margin-bottom: 12px;
    }

    .strength-text {
      font-size: 14px;
      color: var(--text-body);
      line-height: 1.7;
    }

    /* 3. 架构解析区 */
    .arch-wrapper {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 48px;
      align-items: center;
    }

    .arch-specs {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
      margin-top: 28px;
    }

    .spec-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 18px;
    }

    .spec-item-num {
      font-size: 22px;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
    }

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

    .arch-image-box {
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      overflow: hidden;
      background: #FFFFFF;
    }

    /* 4. 六矩阵卡片 */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
    }

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

    .feature-icon-bubble {
      width: 44px;
      height: 44px;
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      margin-bottom: 18px;
    }

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

    .feature-desc {
      font-size: 14px;
      color: var(--text-body);
      line-height: 1.65;
    }

    /* 5. 产品方案对比 */
    .plans-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      align-items: stretch;
    }

    .plan-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px 30px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      position: relative;
    }

    .plan-card.featured {
      border: 2px solid var(--primary);
      box-shadow: var(--shadow-lg);
    }

    .plan-badge-top {
      position: absolute;
      top: -12px;
      right: 24px;
      background: var(--primary);
      color: #FFF;
      font-size: 12px;
      padding: 4px 12px;
      border-radius: var(--radius-full);
      font-weight: 600;
    }

    .plan-title {
      font-size: 22px;
      font-weight: 800;
      color: var(--text-dark);
      margin-bottom: 8px;
    }

    .plan-desc {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 24px;
      min-height: 42px;
    }

    .plan-list {
      list-style: none;
      margin-bottom: 32px;
      flex-grow: 1;
    }

    .plan-list li {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      font-size: 14px;
      color: var(--text-body);
      margin-bottom: 14px;
    }

    .plan-list li i {
      color: #10B981;
      margin-top: 3px;
    }

    /* 6. 深色战术推演区 */
    .method-section {
      background-color: var(--bg-dark);
      color: #E2E8F0;
    }

    .method-section .section-title {
      color: #F8FAFC;
    }

    .method-section .section-desc {
      color: #94A3B8;
    }

    .method-pipeline {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 48px;
      position: relative;
    }

    .pipeline-step {
      background: rgba(30, 41, 59, 0.7);
      border: 1px solid rgba(51, 65, 85, 0.8);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      position: relative;
    }

    .step-index {
      font-size: 28px;
      font-weight: 900;
      color: var(--accent);
      margin-bottom: 12px;
      opacity: 0.8;
    }

    .step-title {
      font-size: 17px;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 10px;
    }

    .step-detail {
      font-size: 13px;
      color: #94A3B8;
      line-height: 1.6;
    }

    /* 7. 多场景实战应用 */
    .scenario-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      align-items: center;
      margin-bottom: 48px;
    }

    .scenario-card-info {
      padding: 20px 0;
    }

    .scenario-card-img {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
    }

    /* 8. 客户案例 */
    .cases-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 28px;
    }

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

    .case-team-meta {
      display: flex;
      align-items: center;
      gap: 14px;
      margin-bottom: 16px;
    }

    .case-team-logo {
      width: 44px;
      height: 44px;
      background: var(--primary-light);
      color: var(--primary);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 16px;
    }

    .case-result-badge {
      font-size: 13px;
      color: #059669;
      background: #ECFDF5;
      padding: 4px 10px;
      border-radius: 6px;
      display: inline-block;
      margin-bottom: 12px;
      font-weight: 600;
    }

    /* 9. 关键指标统计 */
    .metrics-bar-section {
      background: #FFFFFF;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
      padding: 60px 0;
    }

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

    .metric-val {
      font-size: 40px;
      font-weight: 900;
      color: var(--primary);
      margin-bottom: 6px;
      letter-spacing: -0.03em;
    }

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

    /* 10. 分析师与教练评价 */
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .testi-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px;
      box-shadow: var(--shadow-sm);
    }

    .testi-rating {
      color: #F59E0B;
      font-size: 14px;
      margin-bottom: 16px;
    }

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

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

    .testi-avatar {
      width: 40px;
      height: 40px;
      background: #E2E8F0;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--text-body);
      font-size: 14px;
    }

    /* 11. 数据研究资讯 */
    .insights-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

    .insight-body {
      padding: 24px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }

    .insight-tag {
      font-size: 12px;
      color: var(--primary);
      font-weight: 600;
      margin-bottom: 8px;
    }

    .insight-title {
      font-size: 17px;
      font-weight: 700;
      color: var(--text-dark);
      margin-bottom: 10px;
      line-height: 1.4;
    }

    .insight-desc {
      font-size: 13px;
      color: var(--text-body);
      line-height: 1.65;
      margin-bottom: 18px;
    }

    /* 12. FAQ 手风琴 */
    .faq-container {
      max-width: 820px;
      margin: 0 auto;
    }

    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      margin-bottom: 16px;
      overflow: hidden;
    }

    .faq-question {
      padding: 20px 24px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 700;
      font-size: 16px;
      color: var(--text-dark);
      user-select: none;
    }

    .faq-question i {
      transition: transform 0.3s ease;
      color: var(--text-muted);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.35s ease;
      padding: 0 24px;
      font-size: 14px;
      color: var(--text-body);
      line-height: 1.7;
    }

    .faq-item.active .faq-answer {
      max-height: 200px;
      padding-bottom: 20px;
    }

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

    /* 13. 终极转化表单区 */
    .cta-card-wrapper {
      background: linear-gradient(135deg, #1E3A8A 0%, #1E40AF 100%);
      border-radius: var(--radius-lg);
      padding: 56px 48px;
      color: #FFFFFF;
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 48px;
      align-items: center;
      box-shadow: var(--shadow-lg);
    }

    .cta-form-box {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      padding: 32px;
      color: var(--text-dark);
      box-shadow: var(--shadow-md);
    }

    .form-group {
      margin-bottom: 16px;
    }

    .form-group label {
      display: block;
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 6px;
      color: var(--text-dark);
    }

    .form-control {
      width: 100%;
      padding: 11px 14px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      font-size: 14px;
      outline: none;
      transition: border-color 0.2s;
    }

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

    /* 底部固定转化条 */
    .bottom-float-bar {
      position: fixed;
      bottom: 20px;
      left: 50%;
      transform: translateX(-50%) translateY(120%);
      z-index: 99;
      background: rgba(15, 23, 42, 0.92);
      backdrop-filter: blur(12px);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: var(--radius-full);
      padding: 10px 24px;
      display: flex;
      align-items: center;
      gap: 20px;
      color: #FFFFFF;
      box-shadow: 0 15px 30px rgba(0, 0, 0, 0.25);
      transition: transform 0.4s ease;
    }

    .bottom-float-bar.visible {
      transform: translateX(-50%) translateY(0);
    }

    /* 页脚 */
    footer {
      background-color: #0F172A;
      color: #94A3B8;
      padding: 72px 0 36px 0;
      border-top: 1px solid #1E293B;
      font-size: 14px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 56px;
    }

    .footer-col h4 {
      color: #F8FAFC;
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 20px;
    }

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

    .footer-links li {
      margin-bottom: 12px;
    }

    .footer-links a:hover {
      color: #F8FAFC;
    }

    .footer-bottom {
      border-top: 1px solid #1E293B;
      padding-top: 28px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 13px;
      flex-wrap: wrap;
      gap: 16px;
    }

    /* 响应式断点控制 */
    @media (max-width: 1024px) {
      .strengths-grid,
      .features-grid,
      .plans-grid,
      .testimonials-grid,
      .insights-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .method-pipeline {
        grid-template-columns: repeat(2, 1fr);
      }
      .arch-wrapper,
      .scenario-grid,
      .cta-card-wrapper {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      section {
        padding: 56px 0;
      }
      .hero-section {
        padding-top: 110px;
      }
      .hero-h1 {
        font-size: 30px;
      }
      .nav-menu {
        display: none;
      }
      .nav-toggle {
        display: block;
      }
      .strengths-grid,
      .features-grid,
      .plans-grid,
      .cases-grid,
      .testimonials-grid,
      .insights-grid,
      .metrics-grid,
      .method-pipeline {
        grid-template-columns: 1fr;
      }
      .cta-card-wrapper {
        padding: 32px 20px;
      }
      .cta-form-box {
        padding: 24px 18px;
      }
      .bottom-float-bar {
        width: 90%;
        justify-content: space-between;
        bottom: 12px;
        padding: 8px 16px;
        gap: 8px;
      }
      .bottom-float-bar span {
        font-size: 12px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
      }
    }