/* roulang page: index */
:root {
      --primary: #0d53c7;
      --primary-dark: #083b91;
      --accent: #00b4d8;
      --accent-hover: #0096c7;
      --bg-light: #f8fafd;
      --bg-white: #ffffff;
      --bg-dark: #0b132b;
      --text-main: #111827;
      --text-muted: #4b5563;
      --text-sub: #6b7280;
      --border-color: #e5eaf2;
      --shadow-sm: 0 4px 16px rgba(13, 83, 199, 0.05);
      --shadow-md: 0 8px 24px rgba(13, 83, 199, 0.08);
      --shadow-lg: 0 16px 36px rgba(13, 83, 199, 0.12);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      color: var(--text-main);
      background-color: var(--bg-white);
      line-height: 1.65;
      overflow-x: hidden;
      padding-bottom: 72px; /* 给吸底操作条留出空间 */
    }

    /* Top Bar 本地定位/节点 */
    .top-bar {
      background-color: #081a3e;
      color: #9cb3d7;
      font-size: 0.85rem;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .top-bar a {
      color: #9cb3d7;
      text-decoration: none;
      transition: color 0.2s;
    }
    .top-bar a:hover {
      color: #ffffff;
    }

    /* 主导航 */
    .navbar {
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      transition: all 0.3s ease;
    }
    .navbar-brand {
      font-size: 1.35rem;
      font-weight: 800;
      color: var(--primary) !important;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .navbar-brand i {
      font-size: 1.6rem;
      color: var(--accent);
    }
    .nav-link {
      color: var(--text-muted) !important;
      font-weight: 500;
      font-size: 0.95rem;
      padding: 0.5rem 0.9rem !important;
      transition: color 0.25s ease;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary) !important;
    }
    .btn-nav-action {
      background-color: var(--primary);
      color: #fff !important;
      border-radius: 50px;
      padding: 8px 22px;
      font-weight: 600;
      font-size: 0.9rem;
      border: 1px solid var(--primary);
      transition: all 0.3s;
    }
    .btn-nav-action:hover {
      background-color: var(--primary-dark);
      box-shadow: 0 4px 12px rgba(13, 83, 199, 0.25);
    }

    /* 通用组件 */
    .section-title-wrap {
      text-align: center;
      max-width: 780px;
      margin: 0 auto 3.5rem auto;
    }
    .section-badge {
      display: inline-block;
      padding: 4px 14px;
      font-size: 0.8rem;
      font-weight: 700;
      color: var(--primary);
      background-color: rgba(13, 83, 199, 0.08);
      border-radius: 30px;
      margin-bottom: 0.8rem;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }
    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 1rem;
      letter-spacing: -0.5px;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      margin-bottom: 0;
    }

    /* Hero：视频官网全宽遮罩 */
    .hero-video-section {
      position: relative;
      background: #061126 url('/assets/images/4d61ed6335af3fbc.png') center/cover no-repeat;
      min-height: 86vh;
      display: flex;
      align-items: center;
      color: #fff;
      overflow: hidden;
    }
    .hero-video-overlay {
      position: absolute;
      top: 0; left: 0; width: 100%; height: 100%;
      background: radial-gradient(circle at 70% 30%, rgba(13, 83, 199, 0.45) 0%, rgba(6, 17, 38, 0.92) 80%);
    }
    .hero-content {
      position: relative;
      z-index: 2;
      padding: 80px 0;
    }
    .hero-title {
      font-size: 3rem;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 1.5rem;
      letter-spacing: -1px;
    }
    .hero-p {
      font-size: 1.15rem;
      color: #d1dff7;
      max-width: 680px;
      margin-bottom: 2.5rem;
      line-height: 1.8;
    }
    .hero-video-btn {
      width: 64px;
      height: 64px;
      border-radius: 50%;
      background: var(--accent);
      color: #fff;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      cursor: pointer;
      box-shadow: 0 0 0 10px rgba(0, 180, 216, 0.25);
      transition: all 0.3s;
    }
    .hero-video-btn:hover {
      transform: scale(1.08);
      background: #fff;
      color: var(--primary);
    }
    .hero-feature-tags span {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: rgba(255, 255, 255, 0.1);
      border: 1px solid rgba(255, 255, 255, 0.15);
      padding: 6px 16px;
      border-radius: 30px;
      font-size: 0.88rem;
      color: #e5efff;
      margin-right: 10px;
      margin-bottom: 10px;
    }

    /* 板块 2：快速搜索入口 */
    .search-matrix-section {
      margin-top: -45px;
      position: relative;
      z-index: 10;
    }
    .search-card-box {
      background: #ffffff;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-lg);
      padding: 30px 40px;
      border: 1px solid var(--border-color);
    }
    .search-input-group .form-control {
      border: 2px solid #e1e7f0;
      border-right: none;
      border-radius: 10px 0 0 10px;
      padding: 14px 20px;
      font-size: 0.98rem;
    }
    .search-input-group .form-control:focus {
      border-color: var(--primary);
      box-shadow: none;
    }
    .search-input-group .btn {
      border-radius: 0 10px 10px 0;
      padding: 14px 32px;
      background: var(--primary);
      color: #fff;
      font-weight: 600;
      border: 2px solid var(--primary);
    }
    .search-input-group .btn:hover {
      background: var(--primary-dark);
    }
    .quick-hot-tags a {
      display: inline-block;
      color: var(--text-sub);
      text-decoration: none;
      font-size: 0.88rem;
      margin-right: 15px;
      margin-top: 8px;
      transition: color 0.2s;
    }
    .quick-hot-tags a:hover {
      color: var(--primary);
    }

    /* 架构与品牌能力总览 */
    .arch-overview-box {
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      overflow: hidden;
    }
    .tech-metric-pill {
      background: #eff6ff;
      border-left: 4px solid var(--primary);
      padding: 12px 18px;
      border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
      margin-bottom: 12px;
    }

    /* 优势卡片与方案网格 */
    .advantage-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px 26px;
      height: 100%;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
    }
    .advantage-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-lg);
      border-color: #cbdcf8;
    }
    .icon-badge-box {
      width: 58px;
      height: 58px;
      border-radius: 12px;
      background: linear-gradient(135deg, rgba(13, 83, 199, 0.1) 0%, rgba(0, 180, 216, 0.15) 100%);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      color: var(--primary);
      margin-bottom: 20px;
    }

    /* 宽体方案卡片 */
    .engine-solution-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      overflow: hidden;
      transition: all 0.3s ease;
      height: 100%;
    }
    .engine-solution-card:hover {
      box-shadow: var(--shadow-lg);
      transform: translateY(-5px);
    }
    .engine-solution-img {
      height: 220px;
      width: 100%;
      object-fit: cover;
    }
    .engine-solution-body {
      padding: 28px;
    }

    /* 深色沉浸式案例 */
    .dark-cases-section {
      background-color: var(--bg-dark);
      color: #fff;
      padding: 90px 0;
    }
    .dark-case-card {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-md);
      padding: 24px;
      transition: all 0.3s;
    }
    .dark-case-card:hover {
      background: rgba(255, 255, 255, 0.08);
      border-color: var(--accent);
    }
    .dark-case-badge {
      background: rgba(0, 180, 216, 0.15);
      color: var(--accent);
      padding: 3px 10px;
      border-radius: 20px;
      font-size: 0.78rem;
      font-weight: 600;
    }

    /* 爆款清单列表 */
    .ranking-list-group {
      background: #fff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .ranking-item {
      padding: 20px 24px;
      border-bottom: 1px solid var(--border-color);
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 15px;
      transition: background 0.2s;
    }
    .ranking-item:last-child {
      border-bottom: none;
    }
    .ranking-item:hover {
      background: #fbfdff;
    }
    .rank-num {
      width: 32px;
      height: 32px;
      border-radius: 8px;
      background: #edf2f7;
      color: var(--text-main);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 0.95rem;
    }
    .rank-top1 { background: #fee2e2; color: #dc2626; }
    .rank-top2 { background: #ffedd5; color: #ea580c; }
    .rank-top3 { background: #fef3c7; color: #d97706; }

    /* 数据指标看板条 */
    .metric-counter-band {
      background: linear-gradient(135deg, #0d53c7 0%, #083b91 100%);
      color: #fff;
      padding: 60px 0;
    }
    .metric-item-val {
      font-size: 2.7rem;
      font-weight: 800;
      letter-spacing: -1px;
      line-height: 1.1;
      margin-bottom: 8px;
    }
    .metric-item-desc {
      font-size: 0.95rem;
      color: #c9dcfe;
    }

    /* 客户故事与时间线 */
    .story-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px;
      box-shadow: var(--shadow-sm);
      height: 100%;
    }
    .story-phase {
      position: relative;
      padding-left: 20px;
      margin-bottom: 14px;
      border-left: 2px dashed #cbdcf8;
    }
    .story-phase:last-child {
      border-left: none;
      margin-bottom: 0;
    }
    .story-dot {
      position: absolute;
      left: -6px;
      top: 6px;
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: var(--primary);
    }

    /* 客户口碑墙 */
    .testimonial-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      height: 100%;
    }
    .stars-wrap {
      color: #f59e0b;
      margin-bottom: 12px;
      font-size: 0.85rem;
    }

    /* 资讯摘要 */
    .news-card-img {
      height: 180px;
      width: 100%;
      object-fit: cover;
      border-radius: 10px 10px 0 0;
    }

    /* FAQ 手风琴 */
    .accordion-item {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm) !important;
      margin-bottom: 12px;
      overflow: hidden;
    }
    .accordion-button {
      font-weight: 600;
      font-size: 1.05rem;
      color: var(--text-main);
      padding: 18px 22px;
      background: #fff;
    }
    .accordion-button:not(.collapsed) {
      color: var(--primary);
      background: #f4f8ff;
      box-shadow: none;
    }
    .accordion-button:focus {
      box-shadow: none;
      border-color: transparent;
    }
    .accordion-body {
      padding: 20px 22px;
      color: var(--text-muted);
      line-height: 1.8;
      background: #ffffff;
    }

    /* 全生命周期保障条 */
    .guarantee-band {
      background: #f8fafd;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
      padding: 40px 0;
    }
    .guarantee-item {
      display: flex;
      align-items: center;
      gap: 15px;
    }
    .guarantee-icon {
      font-size: 2rem;
      color: var(--primary);
      flex-shrink: 0;
    }

    /* 商业线索表单 */
    .contact-form-box {
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-lg);
      padding: 40px;
    }

    /* 底部收口 Banner */
    .cta-banner-section {
      background: linear-gradient(135deg, #09204a 0%, #0d53c7 100%);
      color: #fff;
      padding: 70px 0;
      text-align: center;
    }

    /* 页脚 */
    .site-footer {
      background: #081120;
      color: #94a3b8;
      padding: 60px 0 20px;
      font-size: 0.9rem;
    }
    .footer-title {
      color: #ffffff;
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 20px;
    }
    .footer-links a {
      color: #94a3b8;
      text-decoration: none;
      display: block;
      margin-bottom: 10px;
      transition: color 0.2s;
    }
    .footer-links a:hover {
      color: #ffffff;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      margin-top: 40px;
      padding-top: 25px;
      font-size: 0.85rem;
    }

    /* 移动端/桌面端吸底常驻转化条 */
    .floating-action-bar {
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.06);
      z-index: 1030;
      padding: 12px 20px;
    }
    .floating-action-content {
      display: flex;
      align-items: center;
      justify-content: space-between;
      max-width: 1200px;
      margin: 0 auto;
    }

    /* 响应式适配 */
    @media (max-width: 991px) {
      .hero-title {
        font-size: 2.3rem;
      }
      .section-title {
        font-size: 1.8rem;
      }
      .metric-item-val {
        font-size: 2.2rem;
      }
      .search-card-box {
        padding: 20px;
      }
    }
    @media (max-width: 767px) {
      .hero-title {
        font-size: 1.85rem;
      }
      .hero-p {
        font-size: 0.98rem;
      }
      .hero-video-section {
        min-height: auto;
      }
      .floating-action-text {
        display: none;
      }
      .ranking-item {
        flex-direction: column;
        align-items: flex-start;
      }
    }