/* roulang page: index */
:root {
      --bg-body: #070b14;
      --bg-surface: #0d1527;
      --bg-card: rgba(13, 21, 39, 0.72);
      --color-primary: #00f2fe;
      --color-accent: #4facfe;
      --color-warning: #ff007f;
      --text-main: #ffffff;
      --text-muted: rgba(255, 255, 255, 0.78);
      --text-sub: rgba(255, 255, 255, 0.48);
      --glass-border: 1px solid rgba(0, 242, 254, 0.18);
      --glass-border-hover: 1px solid rgba(0, 242, 254, 0.55);
      --glass-blur: blur(16px);
      --radius-sm: 8px;
      --radius-md: 16px;
      --radius-lg: 24px;
      --radius-pill: 50px;
      --glow-shadow: 0 0 25px rgba(0, 242, 254, 0.4);
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      background-color: var(--bg-body);
      color: var(--text-muted);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      line-height: 1.65;
      overflow-x: hidden;
      font-size: 15px;
    }

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

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

    .text-glow {
      text-shadow: 0 0 16px rgba(0, 242, 254, 0.45);
    }

    .text-cyan {
      color: var(--color-primary);
    }

    .text-magenta {
      color: var(--color-warning);
    }

    /* 顶栏微型条 */
    .top-mini-bar {
      height: 36px;
      background: rgba(4, 7, 13, 0.95);
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      font-size: 12px;
      color: var(--text-sub);
    }

    /* 悬浮胶囊主导航 */
    .capsule-nav-container {
      position: sticky;
      top: 12px;
      z-index: 1030;
      padding: 0 16px;
    }

    .navbar-capsule {
      background: rgba(13, 21, 39, 0.82);
      backdrop-filter: var(--glass-blur);
      -webkit-backdrop-filter: var(--glass-blur);
      border: var(--glass-border);
      border-radius: var(--radius-pill);
      padding: 8px 24px;
      box-shadow: 0 12px 36px rgba(0, 0, 0, 0.55);
      transition: all 0.3s ease;
    }

    .navbar-brand-logo {
      font-size: 18px;
      font-weight: 800;
      color: #fff;
      display: inline-flex;
      align-items: center;
      gap: 10px;
    }

    .logo-pulse-dot {
      width: 10px;
      height: 10px;
      background: var(--color-primary);
      border-radius: 50%;
      box-shadow: 0 0 10px var(--color-primary);
    }

    .nav-link {
      color: var(--text-muted) !important;
      font-size: 14px;
      font-weight: 500;
      padding: 8px 14px !important;
      border-radius: var(--radius-pill);
      transition: all 0.25s ease;
    }

    .nav-link:hover, .nav-link.active {
      color: var(--color-primary) !important;
      background: rgba(0, 242, 254, 0.08);
    }

    /* 按钮通用组件 */
    .btn-glow {
      background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-primary) 100%);
      color: #04070d !important;
      font-weight: 700;
      border: none;
      border-radius: var(--radius-pill);
      padding: 10px 24px;
      box-shadow: 0 4px 18px rgba(0, 242, 254, 0.35);
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
    }

    .btn-glow:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 28px rgba(0, 242, 254, 0.65);
      color: #000 !important;
    }

    .btn-outline-glow {
      background: transparent;
      color: var(--color-primary) !important;
      border: 1px solid rgba(0, 242, 254, 0.4);
      border-radius: var(--radius-pill);
      padding: 10px 24px;
      font-weight: 600;
      transition: all 0.3s ease;
    }

    .btn-outline-glow:hover {
      background: rgba(0, 242, 254, 0.12);
      border-color: var(--color-primary);
      box-shadow: 0 0 15px rgba(0, 242, 254, 0.25);
    }

    /* 拟态卡片与边框 */
    .tech-card {
      background: var(--bg-card);
      backdrop-filter: var(--glass-blur);
      -webkit-backdrop-filter: var(--glass-blur);
      border: var(--glass-border);
      border-radius: var(--radius-md);
      padding: 28px;
      height: 100%;
      position: relative;
      transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
    }

    .tech-card:hover {
      border: var(--glass-border-hover);
      transform: translateY(-4px);
      box-shadow: 0 16px 36px rgba(0, 0, 0, 0.45), inset 0 0 16px rgba(0, 242, 254, 0.08);
    }

    .tech-badge {
      display: inline-block;
      font-size: 12px;
      font-weight: 600;
      padding: 4px 12px;
      border-radius: var(--radius-pill);
      background: rgba(0, 242, 254, 0.12);
      color: var(--color-primary);
      border: 1px solid rgba(0, 242, 254, 0.25);
    }

    .tech-badge-magenta {
      background: rgba(255, 0, 127, 0.12);
      color: var(--color-warning);
      border: 1px solid rgba(255, 0, 127, 0.3);
    }

    /* 区块间距与背景 */
    .app-section {
      padding: 85px 0;
      position: relative;
    }

    .section-alt {
      background: linear-gradient(180deg, rgba(13, 21, 39, 0.4) 0%, rgba(7, 11, 20, 0.8) 100%);
      border-top: 1px solid rgba(255, 255, 255, 0.04);
      border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    }

    .section-header {
      margin-bottom: 48px;
    }

    .section-title {
      font-size: 2.1rem;
      margin-bottom: 14px;
    }

    .section-lead {
      color: var(--text-muted);
      max-width: 740px;
      font-size: 15px;
      line-height: 1.7;
    }

    /* Hero 首屏线索获客 */
    .hero-lead-section {
      padding: 80px 0 95px 0;
      background: radial-gradient(circle at 50% 20%, rgba(0, 242, 254, 0.12) 0%, rgba(7, 11, 20, 0.98) 75%),
                  url('/assets/images/48ea5b10fc569c29.webp') center/cover no-repeat;
      position: relative;
      border-bottom: 1px solid rgba(0, 242, 254, 0.15);
    }

    .hero-form-box {
      background: rgba(13, 21, 39, 0.88);
      backdrop-filter: var(--glass-blur);
      border: var(--glass-border-hover);
      border-radius: var(--radius-lg);
      padding: 36px 32px;
      box-shadow: 0 20px 50px rgba(0, 0, 0, 0.65);
    }

    .form-control-tech, .form-select-tech {
      background: rgba(7, 11, 20, 0.75);
      border: 1px solid rgba(255, 255, 255, 0.15);
      color: #fff;
      border-radius: var(--radius-pill);
      padding: 12px 20px;
      font-size: 14px;
    }

    .form-control-tech:focus, .form-select-tech:focus {
      background: rgba(7, 11, 20, 0.9);
      border-color: var(--color-primary);
      box-shadow: 0 0 12px rgba(0, 242, 254, 0.4);
      color: #fff;
    }

    .form-select-tech option {
      background-color: #0d1527;
      color: #fff;
    }

    /* 数据指标条 */
    .metrics-ribbon {
      background: linear-gradient(90deg, rgba(0, 242, 254, 0.1) 0%, rgba(79, 172, 254, 0.18) 50%, rgba(0, 242, 254, 0.1) 100%);
      border-top: 1px solid rgba(0, 242, 254, 0.25);
      border-bottom: 1px solid rgba(0, 242, 254, 0.25);
      padding: 38px 0;
    }

    .metric-value {
      font-size: 2.8rem;
      font-weight: 800;
      line-height: 1;
      background: linear-gradient(135deg, #fff 30%, var(--color-primary) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      margin-bottom: 6px;
    }

    /* 架构与手风琴 */
    .accordion-tech .accordion-item {
      background: var(--bg-card);
      border: var(--glass-border);
      border-radius: var(--radius-md) !important;
      margin-bottom: 14px;
      overflow: hidden;
    }

    .accordion-tech .accordion-button {
      background: transparent;
      color: var(--text-main);
      font-weight: 600;
      padding: 18px 24px;
      box-shadow: none;
    }

    .accordion-tech .accordion-button:not(.collapsed) {
      color: var(--color-primary);
      background: rgba(0, 242, 254, 0.05);
      border-bottom: 1px solid rgba(0, 242, 254, 0.15);
    }

    .accordion-tech .accordion-button::after {
      filter: invert(1);
    }

    .accordion-tech .accordion-body {
      color: var(--text-muted);
      font-size: 14px;
      line-height: 1.7;
      padding: 20px 24px;
    }

    /* 价格矩阵卡片 */
    .pricing-card.featured {
      border: 2px solid var(--color-primary);
      box-shadow: 0 0 35px rgba(0, 242, 254, 0.28);
      transform: scale(1.02);
    }

    .check-list {
      list-style: none;
      padding-left: 0;
      margin: 20px 0;
    }

    .check-list li {
      position: relative;
      padding-left: 24px;
      margin-bottom: 10px;
      font-size: 14px;
      color: var(--text-muted);
    }

    .check-list li::before {
      content: "✓";
      position: absolute;
      left: 0;
      color: var(--color-primary);
      font-weight: 800;
    }

    /* 资讯卡片与图片容器 */
    .img-tech-box {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: var(--glass-border);
      position: relative;
    }

    .img-tech-box img {
      width: 100%;
      height: 220px;
      object-fit: cover;
      transition: transform 0.4s ease;
    }

    .tech-card:hover .img-tech-box img {
      transform: scale(1.05);
    }

    /* 页脚设计 */
    .footer-dark {
      background: #04070d;
      border-top: 1px solid rgba(0, 242, 254, 0.2);
      padding: 60px 0 30px 0;
      font-size: 13px;
    }

    .footer-title {
      font-size: 15px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 18px;
    }

    .footer-link-list {
      list-style: none;
      padding: 0;
      margin: 0;
    }

    .footer-link-list li {
      margin-bottom: 8px;
    }

    .footer-link-list a {
      color: var(--text-sub);
    }

    .footer-link-list a:hover {
      color: var(--color-primary);
    }

    @media (max-width: 991px) {
      .navbar-capsule {
        border-radius: var(--radius-md);
      }
      .pricing-card.featured {
        transform: none;
      }
      .metric-value {
        font-size: 2.2rem;
      }
    }