/* roulang page: index */
:root {
      --primary: #635BFF;
      --primary-hover: #5046E5;
      --secondary: #10B981;
      --secondary-hover: #059669;
      --dark-block: #0F1117;
      --dark-card: #1A1D26;
      --body-bg: #F8F9FC;
      --card-bg: #FFFFFF;
      --text-main: #090A0C;
      --text-body: #4A5568;
      --text-muted: #718096;
      --border-color: rgba(226, 232, 240, 0.8);
      --border-dark: rgba(255, 255, 255, 0.1);
      --radius-sm: 8px;
      --radius-md: 12px;
      --shadow-subtle: 0 1px 3px rgba(0,0,0,0.05), 0 10px 15px -5px rgba(0,0,0,0.04);
      --shadow-hover: 0 10px 25px -5px rgba(99, 91, 255, 0.15), 0 8px 10px -6px rgba(99, 91, 255, 0.1);
    }

    *, *::before, *::after {
      box-sizing: border-box;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--body-bg);
      color: var(--text-body);
      line-height: 1.75;
      margin: 0;
      padding: 0;
      overflow-x: hidden;
    }

    h1, h2, h3, h4, h5, h6 {
      color: var(--text-main);
      line-height: 1.3;
      font-weight: 700;
      letter-spacing: -0.02em;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    }

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

    /* 顶部微型状态栏 */
    .top-status-bar {
      background: #090A0C;
      color: #94A3B8;
      font-size: 0.8125rem;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      padding: 6px 0;
    }

    /* 主导航 */
    .main-navbar {
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      position: sticky;
      top: 0;
      z-index: 1020;
      padding: 12px 0;
    }

    .navbar-brand {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--text-main) !important;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .brand-icon {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, var(--primary), #9061F9);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #FFFFFF;
      font-size: 1rem;
    }

    .nav-link {
      color: var(--text-body) !important;
      font-weight: 500;
      font-size: 0.9375rem;
      padding: 8px 14px !important;
      border-radius: 6px;
    }

    .nav-link:hover {
      color: var(--primary) !important;
      background: rgba(99, 91, 255, 0.05);
    }

    /* 按钮规范 */
    .btn-brand-primary {
      background-color: var(--primary);
      color: #FFFFFF;
      font-weight: 600;
      font-size: 0.9375rem;
      padding: 10px 20px;
      border-radius: var(--radius-sm);
      border: 1px solid transparent;
      box-shadow: 0 2px 4px rgba(99, 91, 255, 0.2);
      transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
    }

    .btn-brand-primary:hover {
      background-color: var(--primary-hover);
      color: #FFFFFF;
      transform: translateY(-2px);
      box-shadow: var(--shadow-hover);
    }

    .btn-brand-secondary {
      background-color: transparent;
      color: var(--text-main);
      font-weight: 600;
      font-size: 0.9375rem;
      padding: 10px 20px;
      border-radius: var(--radius-sm);
      border: 1px solid rgba(203, 213, 225, 0.8);
      transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
    }

    .btn-brand-secondary:hover {
      background-color: #F1F5F9;
      color: var(--primary);
      border-color: var(--primary);
      transform: translateY(-2px);
    }

    .btn-brand-accent {
      background-color: var(--secondary);
      color: #FFFFFF;
      font-weight: 600;
      padding: 10px 22px;
      border-radius: var(--radius-sm);
      border: none;
      transition: all 0.2s ease;
    }

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

    /* 板块通用标准 */
    .section-padding {
      padding: 90px 0;
    }

    .section-alt {
      background-color: #FFFFFF;
    }

    .section-title-wrap {
      margin-bottom: 54px;
    }

    .badge-sub {
      background: rgba(99, 91, 255, 0.1);
      color: var(--primary);
      font-size: 0.8125rem;
      font-weight: 700;
      letter-spacing: 0.05em;
      padding: 6px 14px;
      border-radius: 4px;
      text-transform: uppercase;
      display: inline-block;
      margin-bottom: 12px;
    }

    .section-desc {
      font-size: 1.0625rem;
      color: var(--text-muted);
      max-width: 760px;
      margin: 0 auto;
    }

    /* 卡片标准 */
    .app-card {
      background: var(--card-bg);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-subtle);
      transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
      height: 100%;
      position: relative;
      overflow: hidden;
    }

    .app-card:hover {
      transform: translateY(-3px);
      box-shadow: 0 12px 24px -6px rgba(15, 23, 42, 0.08);
      border-color: rgba(99, 91, 255, 0.4);
    }

    /* Hero 板块 (线索提问式 + 痛点表单) */
    .hero-section {
      background: linear-gradient(180deg, #FFFFFF 0%, #F1F4FD 100%);
      padding: 70px 0 80px;
      border-bottom: 1px solid var(--border-color);
    }

    .hero-pain-box {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      padding: 32px;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.06);
      border: 1px solid var(--border-color);
    }

    .stat-mono {
      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
      font-weight: 700;
    }

    /* 深色技术区块 */
    .dark-engine-section {
      background-color: var(--dark-block);
      color: #94A3B8;
    }

    .dark-engine-section h2, .dark-engine-section h3, .dark-engine-section h4 {
      color: #F8FAFC;
    }

    .dark-card {
      background: var(--dark-card);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-md);
    }

    /* 流程看板 */
    .pipeline-step-item {
      position: relative;
      padding: 24px;
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
    }

    .pipeline-step-item::after {
      content: '\f054';
      font-family: 'Font Awesome 6 Free';
      font-weight: 900;
      position: absolute;
      right: -15px;
      top: 50%;
      transform: translateY(-50%);
      color: #CBD5E1;
      font-size: 1rem;
      z-index: 2;
    }

    @media (max-width: 991.98px) {
      .pipeline-step-item::after {
        display: none;
      }
    }

    /* 对比表格面板 */
    .comparison-table-wrapper {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
    }

    /* 时间轴 */
    .timeline-wrap {
      border-left: 2px solid #E2E8F0;
      margin-left: 16px;
      padding-left: 32px;
    }

    .timeline-node {
      position: relative;
      margin-bottom: 36px;
    }

    .timeline-node::before {
      content: '';
      position: absolute;
      left: -40px;
      top: 6px;
      width: 16px;
      height: 16px;
      border-radius: 50%;
      background: var(--primary);
      border: 3px solid #FFFFFF;
      box-shadow: 0 0 0 2px var(--primary);
    }

    /* 手风琴 FAQ */
    .accordion-button:not(.collapsed) {
      color: var(--primary);
      background-color: rgba(99, 91, 255, 0.05);
      box-shadow: none;
    }

    .accordion-button:focus {
      box-shadow: none;
      border-color: rgba(99, 91, 255, 0.25);
    }

    /* 页脚 */
    .site-footer {
      background: #090A0C;
      color: #94A3B8;
      padding: 70px 0 30px;
      font-size: 0.9375rem;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
    }

    .site-footer h6 {
      color: #FFFFFF;
      margin-bottom: 20px;
      font-weight: 600;
    }

    .site-footer a {
      color: #94A3B8;
    }

    .site-footer a:hover {
      color: #FFFFFF;
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      margin-top: 50px;
      padding-top: 25px;
      font-size: 0.8125rem;
    }

    /* 移动端调优 */
    @media (max-width: 767.98px) {
      .section-padding {
        padding: 55px 0;
      }
      .hero-section {
        padding: 40px 0 50px;
      }
    }