/* roulang page: index */
:root {
      --primary: #0A4D68;
      --primary-dark: #083D53;
      --accent: #088395;
      --accent-light: #05BFDB;
      --highlight: #E65C00;
      --highlight-hover: #CC5200;
      --bg-base: #F8FAFC;
      --text-main: #1E293B;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
      --card-bg: #FFFFFF;
      --dark-section: #0F172A;
      --radius-sm: 6px;
      --radius-md: 8px;
      --radius-lg: 12px;
      --shadow-sm: 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(10, 77, 104, 0.12);
      --font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }

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

    body {
      font-family: var(--font-family);
      background-color: var(--bg-base);
      color: var(--text-main);
      line-height: 1.75;
      margin: 0;
      padding: 0;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

    a {
      color: var(--primary);
      text-decoration: none;
      transition: color 0.2s ease;
    }
    a:hover {
      color: var(--highlight);
    }

    /* 顶部双行导航 (政务规范版式) */
    .utility-bar {
      background-color: #1E293B;
      color: #94A3B8;
      font-size: 13px;
      padding: 7px 0;
      border-bottom: 1px solid #334155;
    }
    .utility-bar a {
      color: #CBD5E1;
      font-size: 13px;
    }
    .utility-bar a:hover {
      color: #FFFFFF;
    }
    .utility-badge {
      background: rgba(8, 131, 149, 0.25);
      color: #38BDF8;
      padding: 2px 8px;
      border-radius: 4px;
      border: 1px solid rgba(56, 189, 248, 0.3);
      font-size: 11px;
      font-weight: 500;
    }

    .main-nav-bar {
      background: #FFFFFF;
      border-bottom: 2px solid #E2E8F0;
      position: sticky;
      top: 0;
      z-index: 1020;
      box-shadow: 0 2px 4px rgba(0,0,0,0.03);
    }
    .navbar-brand {
      font-weight: 800;
      font-size: 1.35rem;
      color: var(--primary) !important;
      letter-spacing: -0.5px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .navbar-brand .brand-badge {
      background-color: var(--highlight);
      color: #fff;
      font-size: 11px;
      font-weight: 700;
      padding: 2px 6px;
      border-radius: 4px;
      letter-spacing: 0.5px;
    }
    .nav-link {
      font-size: 14.5px;
      font-weight: 500;
      color: var(--text-main) !important;
      padding: 10px 14px !important;
      border-radius: 4px;
      transition: all 0.2s;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary) !important;
      background-color: rgba(10, 77, 104, 0.05);
    }
    .btn-download-nav {
      background-color: var(--highlight);
      color: #FFFFFF !important;
      font-size: 14px;
      font-weight: 600;
      padding: 8px 18px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--highlight);
      box-shadow: 0 2px 6px rgba(230, 92, 0, 0.2);
      transition: all 0.2s;
    }
    .btn-download-nav:hover {
      background-color: var(--highlight-hover);
      border-color: var(--highlight-hover);
      transform: translateY(-1px);
    }

    /* 板块排版公用 */
    .section-padding {
      padding: 85px 0;
    }
    .section-alt {
      background-color: #FFFFFF;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }
    .section-header {
      margin-bottom: 45px;
    }
    .section-tag {
      display: inline-block;
      font-size: 12px;
      font-weight: 700;
      letter-spacing: 1px;
      text-transform: uppercase;
      color: var(--accent);
      background-color: rgba(8, 131, 149, 0.08);
      padding: 4px 12px;
      border-radius: 4px;
      margin-bottom: 12px;
      border: 1px solid rgba(8, 131, 149, 0.15);
    }
    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }
    .section-desc {
      font-size: 15.5px;
      color: var(--text-muted);
      max-width: 820px;
      margin: 0 auto;
      line-height: 1.8;
    }

    /* Hero 板块 */
    #hero {
      background: linear-gradient(135deg, #072E3F 0%, #0A4D68 60%, #083D53 100%);
      color: #FFFFFF;
      position: relative;
      padding: 90px 0 100px;
      overflow: hidden;
    }
    #hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background-image: url('/assets/images/bb16d4788c6d586b.jpg');
      background-size: cover;
      background-position: center;
      opacity: 0.14;
      pointer-events: none;
    }
    .hero-content {
      position: relative;
      z-index: 2;
    }
    .hero-title {
      font-size: 3rem;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 24px;
      letter-spacing: -1px;
    }
    .hero-title span {
      color: #38BDF8;
    }
    .hero-lead {
      font-size: 1.08rem;
      line-height: 1.85;
      color: #E2E8F0;
      margin-bottom: 35px;
      max-width: 620px;
    }
    .hero-actions .btn {
      padding: 12px 26px;
      font-weight: 600;
      font-size: 15px;
      border-radius: var(--radius-sm);
    }
    .btn-hero-primary {
      background-color: var(--highlight);
      border-color: var(--highlight);
      color: #fff;
    }
    .btn-hero-primary:hover {
      background-color: var(--highlight-hover);
      border-color: var(--highlight-hover);
      color: #fff;
    }
    .btn-hero-outline {
      border: 1px solid rgba(255,255,255,0.4);
      color: #fff;
      background: rgba(255,255,255,0.08);
      backdrop-filter: blur(4px);
    }
    .btn-hero-outline:hover {
      background: rgba(255,255,255,0.18);
      color: #fff;
    }
    .hero-card-preview {
      background: rgba(15, 23, 42, 0.75);
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: var(--radius-lg);
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.35);
      backdrop-filter: blur(12px);
      padding: 24px;
      position: relative;
    }
    .hero-card-preview img {
      width: 100%;
      height: 290px;
      object-fit: cover;
      border-radius: var(--radius-md);
      margin-bottom: 18px;
      border: 1px solid rgba(255,255,255,0.1);
    }

    /* 架构与产品概述 (#overview) */
    .overview-spec-box {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-left: 4px solid var(--primary);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
    }
    .spec-badge-tech {
      font-size: 13px;
      font-weight: 600;
      color: var(--primary);
      background-color: rgba(10, 77, 104, 0.08);
      padding: 4px 10px;
      border-radius: 4px;
      display: inline-block;
      margin-bottom: 10px;
    }

    /* 核心优势卡片 (#advantages) */
    .advantage-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      height: 100%;
      transition: transform 0.2s ease, box-shadow 0.2s ease;
      box-shadow: var(--shadow-sm);
    }
    .advantage-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(8, 131, 149, 0.3);
    }
    .adv-icon-box {
      width: 48px;
      height: 48px;
      background-color: rgba(8, 131, 149, 0.1);
      color: var(--accent);
      border-radius: 6px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      margin-bottom: 18px;
    }
    .adv-title {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }
    .adv-text {
      font-size: 14.5px;
      color: var(--text-muted);
      margin-bottom: 0;
      line-height: 1.7;
    }

    /* 赛事场景 (#matches) */
    .scene-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      height: 100%;
      display: flex;
      flex-direction: column;
    }
    .scene-thumb {
      height: 200px;
      width: 100%;
      object-fit: cover;
    }
    .scene-body {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .scene-meta-badges {
      display: flex;
      gap: 6px;
      flex-wrap: wrap;
      margin-bottom: 12px;
    }
    .badge-subtle {
      font-size: 12px;
      font-weight: 500;
      background: #F1F5F9;
      color: #475569;
      padding: 3px 8px;
      border-radius: 4px;
    }

    /* 深色技术架构 (#technology) */
    .section-dark {
      background-color: var(--dark-section);
      color: #FFFFFF;
      padding: 90px 0;
      position: relative;
    }
    .tech-metric-card {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--radius-md);
      padding: 22px;
      height: 100%;
    }
    .tech-metric-title {
      font-size: 1rem;
      font-weight: 600;
      color: #38BDF8;
      margin-bottom: 8px;
    }
    .tech-metric-desc {
      font-size: 14px;
      color: #94A3B8;
      line-height: 1.65;
      margin-bottom: 0;
    }

    /* 客户案例 (#stories) */
    .case-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      height: 100%;
    }

    /* 运行指标数据通栏 (#stats) */
    .stats-bar-wrapper {
      background: #FFFFFF;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
      padding: 45px 0;
    }
    .stat-number {
      font-size: 2.5rem;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.1;
      margin-bottom: 6px;
      letter-spacing: -1px;
    }
    .stat-label {
      font-size: 14px;
      font-weight: 600;
      color: var(--text-muted);
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    /* 评价区 (#reviews) */
    .review-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      height: 100%;
      box-shadow: var(--shadow-sm);
      position: relative;
    }
    .review-user-info {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-top: 18px;
      border-top: 1px solid #F1F5F9;
      padding-top: 14px;
    }

    /* 资讯动态 (#news) */
    .news-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      height: 100%;
      box-shadow: var(--shadow-sm);
    }
    .news-date {
      font-size: 12.5px;
      color: var(--text-muted);
      font-weight: 500;
    }
    .news-action-link {
      color: var(--accent);
      font-size: 14px;
      font-weight: 600;
      text-decoration: underline;
      display: inline-block;
      margin-top: 12px;
    }

    /* FAQ (#faq) */
    .accordion-item {
      border: 1px solid var(--border-color) !important;
      border-radius: var(--radius-sm) !important;
      margin-bottom: 14px;
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .accordion-button {
      font-size: 16px;
      font-weight: 600;
      color: var(--text-main);
      background-color: #FFFFFF;
      padding: 18px 22px;
    }
    .accordion-button:not(.collapsed) {
      background-color: rgba(10, 77, 104, 0.04);
      color: var(--primary);
      box-shadow: none;
    }
    .accordion-body {
      font-size: 14.5px;
      line-height: 1.8;
      color: var(--text-muted);
      background-color: #FFFFFF;
      padding: 20px 22px;
      border-top: 1px solid var(--border-color);
    }

    /* 保障徽章条 (#guarantee) */
    .guarantee-box {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      background: #FFFFFF;
      padding: 22px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      height: 100%;
    }
    .guarantee-icon {
      font-size: 28px;
      color: var(--accent);
      margin-bottom: 10px;
    }

    /* 商务部署 CTA (#download) */
    .cta-banner-box {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 48px;
      box-shadow: var(--shadow-sm);
      position: relative;
    }

    /* 页脚 */
    footer {
      background-color: #0F172A;
      color: #94A3B8;
      font-size: 14px;
      border-top: 3px solid var(--primary);
    }
    .footer-top {
      padding: 60px 0 40px;
    }
    .footer-title {
      font-size: 15px;
      font-weight: 700;
      color: #F8FAFC;
      margin-bottom: 18px;
      letter-spacing: 0.5px;
    }
    .footer-links {
      list-style: none;
      padding-left: 0;
      margin-bottom: 0;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a {
      color: #94A3B8;
      font-size: 14px;
    }
    .footer-links a:hover {
      color: #FFFFFF;
    }
    .footer-bottom {
      border-top: 1px solid #1E293B;
      padding: 24px 0;
      font-size: 13px;
      color: #64748B;
    }

    @media (max-width: 991.98px) {
      .hero-title {
        font-size: 2.3rem;
      }
      .section-padding {
        padding: 60px 0;
      }
      .navbar-collapse {
        background: #FFFFFF;
        padding: 16px;
        border-radius: 8px;
        box-shadow: var(--shadow-sm);
        margin-top: 10px;
      }
    }