/* roulang page: index */
:root {
      --primary: #00E599;
      --primary-hover: #00C882;
      --primary-light: rgba(0, 229, 153, 0.12);
      --secondary: #0F141C;
      --accent-orange: #FF5C00;
      --accent-red: #EF4444;
      --bg-main: #F4F6F9;
      --bg-white: #FFFFFF;
      --bg-dark: #090D14;
      --bg-dark-card: #121824;
      --text-main: #111927;
      --text-muted: #687588;
      --text-light: #94A3B8;
      --border-color: #E2E8F0;
      --border-dark: #1E293B;
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --radius-pill: 9999px;
      --shadow-sm: 0 2px 8px rgba(15, 20, 28, 0.04);
      --shadow-md: 0 8px 24px -4px rgba(15, 20, 28, 0.08);
      --shadow-glow: 0 0 25px rgba(0, 229, 153, 0.25);
    }

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

    body {
      font-family: 'Noto Sans SC', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: all 0.2s ease;
    }

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

    /* 顶部状态与信任条 */
    .top-status-bar {
      height: 38px;
      background-color: #06090F;
      color: var(--text-light);
      font-size: 0.8rem;
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    }
    .top-badge-indicator {
      display: inline-block;
      width: 7px;
      height: 7px;
      background-color: var(--primary);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--primary);
      margin-right: 6px;
    }

    /* SaaS 命令栏主导航 */
    .saas-header {
      background-color: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      position: sticky;
      top: 0;
      z-index: 1040;
      transition: background 0.3s;
    }
    .brand-logo-text {
      font-size: 1.25rem;
      font-weight: 800;
      letter-spacing: -0.5px;
      color: var(--secondary);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .brand-logo-tag {
      background: var(--secondary);
      color: var(--primary);
      font-size: 0.7rem;
      font-weight: 700;
      padding: 2px 7px;
      border-radius: var(--radius-sm);
      font-family: 'JetBrains Mono', monospace;
    }
    .nav-link-custom {
      font-size: 0.92rem;
      font-weight: 600;
      color: var(--text-main);
      padding: 0.5rem 0.85rem;
      border-radius: var(--radius-sm);
    }
    .nav-link-custom:hover {
      color: var(--primary-hover);
      background-color: rgba(0, 229, 153, 0.06);
    }
    .command-search-btn {
      background-color: #F1F4F9;
      border: 1px solid var(--border-color);
      color: var(--text-muted);
      border-radius: var(--radius-pill);
      padding: 6px 14px;
      font-size: 0.82rem;
      display: flex;
      align-items: center;
      gap: 10px;
      cursor: pointer;
      transition: border 0.2s;
    }
    .command-search-btn:hover {
      border-color: #CBD5E1;
      background-color: #EAEFF6;
    }
    .kbd-shortcut {
      background: #FFFFFF;
      border: 1px solid #CBD5E1;
      border-radius: 4px;
      font-size: 0.7rem;
      padding: 1px 5px;
      color: #64748B;
      font-family: 'JetBrains Mono', monospace;
    }

    /* 按钮与交互徽章 */
    .btn-athletic-primary {
      background-color: var(--primary);
      color: var(--secondary);
      font-weight: 700;
      font-size: 0.92rem;
      padding: 9px 22px;
      border-radius: var(--radius-pill);
      border: 1px solid var(--primary);
      box-shadow: 0 4px 12px rgba(0, 229, 153, 0.2);
      transition: all 0.25s ease;
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }
    .btn-athletic-primary:hover {
      background-color: var(--primary-hover);
      color: var(--secondary);
      box-shadow: 0 6px 18px rgba(0, 229, 153, 0.35);
      transform: translateY(-1px);
    }
    .btn-athletic-outline {
      background-color: transparent;
      color: #FFFFFF;
      font-weight: 600;
      font-size: 0.92rem;
      padding: 9px 20px;
      border-radius: var(--radius-pill);
      border: 1px solid rgba(255, 255, 255, 0.2);
      transition: all 0.2s ease;
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }
    .btn-athletic-outline:hover {
      background-color: rgba(255, 255, 255, 0.08);
      color: #FFFFFF;
      border-color: #FFFFFF;
    }

    /* 首屏 Hero 申请与资格 */
    .hero-banner-section {
      background: radial-gradient(circle at 80% 20%, rgba(0, 229, 153, 0.15) 0%, transparent 50%),
                  radial-gradient(circle at 10% 80%, rgba(255, 92, 0, 0.08) 0%, transparent 40%),
                  var(--bg-dark);
      color: #FFFFFF;
      padding: 70px 0 90px;
      position: relative;
      border-bottom: 1px solid var(--border-dark);
    }
    .hero-badge-pill {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(0, 229, 153, 0.4);
      padding: 5px 14px;
      border-radius: var(--radius-pill);
      font-size: 0.82rem;
      color: var(--primary);
      margin-bottom: 24px;
    }
    .hero-h1-title {
      font-size: clamp(2rem, 3.5vw, 3.1rem);
      font-weight: 800;
      line-height: 1.25;
      letter-spacing: -0.8px;
      margin-bottom: 20px;
    }
    .hero-lead-text {
      font-size: 1.05rem;
      color: var(--text-light);
      line-height: 1.75;
      margin-bottom: 30px;
      max-width: 620px;
    }
    .hero-trial-card {
      background: var(--bg-dark-card);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-lg);
      padding: 30px;
      box-shadow: 0 16px 36px rgba(0,0,0,0.4);
      position: relative;
    }
    .trial-quota-tag {
      position: absolute;
      top: -12px;
      right: 24px;
      background: var(--accent-orange);
      color: #FFF;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 3px 10px;
      border-radius: var(--radius-pill);
    }

    /* 板块通用间距与标题 */
    .section-padding {
      padding: 80px 0;
    }
    .section-header-wrap {
      margin-bottom: 48px;
    }
    .section-kicker {
      text-transform: uppercase;
      font-size: 0.8rem;
      font-weight: 800;
      letter-spacing: 1.5px;
      color: var(--primary);
      margin-bottom: 8px;
      display: inline-block;
    }
    .section-title {
      font-size: 2rem;
      font-weight: 800;
      letter-spacing: -0.5px;
      color: var(--text-main);
      margin-bottom: 12px;
    }
    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
      max-width: 740px;
      line-height: 1.7;
    }

    /* 痛点诊断卡片 */
    .pain-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      height: 100%;
      border-top: 3px solid var(--accent-red);
      transition: transform 0.2s, box-shadow 0.2s;
    }
    .pain-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .pain-card h4 {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--secondary);
    }

    /* 架构与软硬件说明 */
    .tech-spec-badge {
      background: #F1F5F9;
      color: #334155;
      font-family: 'JetBrains Mono', monospace;
      font-size: 0.85rem;
      padding: 6px 12px;
      border-radius: var(--radius-sm);
      display: inline-block;
      margin-bottom: 14px;
      border: 1px solid #E2E8F0;
    }

    /* 核心优势卡片 */
    .advantage-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 26px;
      height: 100%;
      position: relative;
      transition: all 0.25s ease;
    }
    .advantage-card:hover {
      border-color: var(--primary);
      box-shadow: var(--shadow-md);
      transform: translateY(-3px);
    }
    .adv-icon-num {
      font-family: 'JetBrains Mono', monospace;
      font-size: 1.4rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 12px;
    }

    /* 产品方案三列卡片 */
    .product-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px 26px;
      height: 100%;
      display: flex;
      flex-direction: column;
      position: relative;
      transition: all 0.25s;
    }
    .product-card.featured {
      border: 2px solid var(--primary);
      box-shadow: 0 12px 30px rgba(0, 229, 153, 0.15);
    }
    .product-badge-hot {
      position: absolute;
      top: 16px;
      right: 16px;
      background: var(--primary);
      color: var(--secondary);
      font-size: 0.75rem;
      font-weight: 800;
      padding: 3px 10px;
      border-radius: var(--radius-pill);
    }

    /* 深色沉浸技术原理区 */
    .dark-concept-wrap {
      background: #06090F;
      color: #FFFFFF;
      position: relative;
      padding: 85px 0;
      border-top: 1px solid var(--border-dark);
      border-bottom: 1px solid var(--border-dark);
    }
    .dark-concept-wrap .section-title {
      color: #FFFFFF;
    }
    .dark-concept-wrap .section-desc {
      color: var(--text-light);
    }
    .radar-canvas-box {
      background: #0D131F;
      border: 1px solid rgba(0, 229, 153, 0.25);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
    }
    .radar-node {
      display: inline-block;
      padding: 4px 10px;
      background: rgba(255, 255, 255, 0.05);
      border-left: 2px solid var(--primary);
      font-size: 0.8rem;
      font-family: 'JetBrains Mono', monospace;
      color: #CBD5E1;
      margin-bottom: 8px;
    }

    /* 实施步骤条 */
    .workflow-step {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
      height: 100%;
    }
    .step-digit {
      font-size: 2.2rem;
      font-weight: 900;
      font-family: 'JetBrains Mono', monospace;
      color: #E2E8F0;
      line-height: 1;
      margin-bottom: 12px;
    }

    /* 适用人群与角色 */
    .audience-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 22px;
      display: flex;
      flex-direction: column;
      height: 100%;
    }
    .audience-role {
      font-weight: 700;
      color: var(--secondary);
      font-size: 1.1rem;
      margin-bottom: 6px;
    }

    /* 案例对比卡片 */
    .case-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .case-tag {
      background: #EEF2F6;
      color: #334155;
      font-size: 0.75rem;
      font-weight: 600;
      padding: 3px 8px;
      border-radius: 4px;
    }

    /* 数据指标条 */
    .metrics-bar-section {
      background: var(--secondary);
      color: #FFFFFF;
      padding: 60px 0;
      border-top: 1px solid var(--border-dark);
      border-bottom: 1px solid var(--border-dark);
    }
    .metric-num {
      font-size: 2.7rem;
      font-weight: 800;
      font-family: 'JetBrains Mono', monospace;
      color: var(--primary);
      line-height: 1.1;
      margin-bottom: 6px;
    }
    .metric-label {
      font-size: 0.88rem;
      color: #94A3B8;
      font-weight: 500;
    }

    /* 客户证言卡片 */
    .testimonial-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      height: 100%;
      position: relative;
    }
    .testimonial-quote {
      font-size: 0.95rem;
      color: #334155;
      line-height: 1.7;
      margin-bottom: 18px;
    }
    .coach-profile {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .coach-avatar-ph {
      width: 44px;
      height: 44px;
      background: #E2E8F0;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--secondary);
      font-size: 0.9rem;
    }

    /* 新闻图文卡片 */
    .news-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      height: 100%;
      transition: transform 0.2s;
    }
    .news-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
    }
    .news-content {
      padding: 20px;
    }
    .news-date {
      font-size: 0.78rem;
      color: #94A3B8;
      font-family: 'JetBrains Mono', monospace;
      margin-bottom: 8px;
    }

    /* 手风琴折叠样式重构 */
    .accordion-item {
      border: 1px solid var(--border-color) !important;
      border-radius: var(--radius-md) !important;
      margin-bottom: 12px;
      overflow: hidden;
      background: var(--bg-white);
    }
    .accordion-button {
      font-weight: 700;
      font-size: 1rem;
      color: var(--secondary) !important;
      padding: 18px 24px;
      background-color: var(--bg-white) !important;
      box-shadow: none !important;
    }
    .accordion-button:not(.collapsed) {
      background-color: #F8FAFC !important;
      color: var(--primary-hover) !important;
    }
    .accordion-body {
      font-size: 0.95rem;
      color: #475569;
      line-height: 1.7;
      padding: 16px 24px 22px;
    }

    /* 底部 CTA 容器 */
    .cta-container {
      background: radial-gradient(circle at 50% 30%, rgba(0, 229, 153, 0.12) 0%, transparent 60%), #0B1019;
      border: 1px solid rgba(0, 229, 153, 0.3);
      border-radius: var(--radius-lg);
      padding: 50px 30px;
      box-shadow: var(--shadow-glow);
    }

    /* 标准页脚 */
    .site-footer {
      background-color: #06090F;
      color: #94A3B8;
      font-size: 0.88rem;
      padding: 60px 0 25px;
      border-top: 1px solid var(--border-dark);
    }
    .footer-col-title {
      font-size: 0.95rem;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 18px;
      letter-spacing: 0.5px;
    }
    .footer-links-list {
      list-style: none;
      padding: 0;
      margin: 0;
    }
    .footer-links-list li {
      margin-bottom: 10px;
    }
    .footer-links-list a:hover {
      color: var(--primary);
    }
    .footer-bottom-line {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      margin-top: 45px;
      padding-top: 25px;
      font-size: 0.8rem;
    }

    /* 响应式调整 */
    @media (max-width: 991.98px) {
      .hero-h1-title {
        font-size: 2.2rem;
      }
      .section-padding {
        padding: 55px 0;
      }
      .metric-num {
        font-size: 2.1rem;
      }
    }
    @media (max-width: 767.98px) {
      .hero-banner-section {
        padding: 45px 0 65px;
      }
      .section-title {
        font-size: 1.65rem;
      }
      .command-search-btn {
        display: none;
      }
    }