/* roulang page: index */
/* ==========================================================
       设计系统变量与全局Reset
       ========================================================== */
    :root {
      --primary-green: #10B981;
      --primary-hover: #059669;
      --accent-cyan: #06B6D4;
      --accent-glow: rgba(6, 182, 212, 0.25);
      --bg-dark: #0B1315;
      --bg-dark-card: #121F22;
      --bg-dark-border: rgba(16, 185, 129, 0.2);
      --bg-light: #F4F8F7;
      --surface-white: #FFFFFF;
      --text-main: #0B1315;
      --text-muted: #526366;
      --text-light-muted: #94A3B8;
      --warning-amber: #F59E0B;
      --card-radius: 16px;
      --btn-radius: 10px;
      --soft-shadow: 0 10px 30px -10px rgba(11, 19, 21, 0.08);
      --hover-shadow: 0 20px 35px -10px rgba(16, 185, 129, 0.16);
      --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
    }

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

    body {
      font-family: var(--font-stack);
      background-color: var(--bg-light);
      color: var(--text-main);
      line-height: 1.65;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

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

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

    /* ==========================================================
       SaaS 命令栏导航栏组件
       ========================================================== */
    .top-utility-bar {
      background-color: #070D0E;
      color: #94A3B8;
      font-size: 0.8125rem;
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      padding: 6px 0;
    }
    .status-pulse {
      display: inline-block;
      width: 8px;
      height: 8px;
      background-color: var(--primary-green);
      border-radius: 50%;
      margin-right: 6px;
      box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
      animation: pulse 2s infinite;
    }
    @keyframes pulse {
      0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
      70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); }
      100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
    }

    .main-navbar {
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(12px);
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
      position: sticky;
      top: 0;
      z-index: 1030;
      border-bottom: 1px solid rgba(16, 185, 129, 0.1);
    }
    .navbar-brand-custom {
      font-weight: 800;
      font-size: 1.35rem;
      color: var(--bg-dark);
      letter-spacing: -0.5px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .brand-icon {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, var(--primary-green), var(--accent-cyan));
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #FFFFFF;
      font-size: 1.1rem;
    }
    .nav-link-custom {
      font-weight: 600;
      font-size: 0.95rem;
      color: #334155 !important;
      padding: 0.5rem 0.9rem !important;
      border-radius: 8px;
    }
    .nav-link-custom:hover, .nav-link-custom:focus {
      color: var(--primary-green) !important;
      background: rgba(16, 185, 129, 0.06);
    }
    .command-box {
      background: #EDF3F2;
      border: 1px solid #D5E2DF;
      border-radius: 8px;
      padding: 5px 12px;
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.85rem;
      color: var(--text-muted);
      cursor: pointer;
    }
    .kbd-shortcut {
      background: #FFFFFF;
      border: 1px solid #CBD5E1;
      border-radius: 4px;
      padding: 2px 5px;
      font-size: 0.7rem;
      font-family: monospace;
      font-weight: 700;
      color: #475569;
    }

    /* ==========================================================
       通用排版与按钮、标签
       ========================================================== */
    .section-padding {
      padding: 85px 0;
    }
    .section-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 6px 14px;
      border-radius: 30px;
      font-size: 0.85rem;
      font-weight: 700;
      letter-spacing: 0.5px;
      text-transform: uppercase;
      margin-bottom: 14px;
    }
    .badge-soft-green {
      background: rgba(16, 185, 129, 0.12);
      color: var(--primary-green);
      border: 1px solid rgba(16, 185, 129, 0.25);
    }
    .badge-soft-cyan {
      background: rgba(6, 182, 212, 0.12);
      color: var(--accent-cyan);
      border: 1px solid rgba(6, 182, 212, 0.25);
    }
    .section-title {
      font-size: 2.25rem;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }
    .section-subtitle {
      font-size: 1.05rem;
      color: var(--text-muted);
      max-width: 780px;
      line-height: 1.7;
    }
    .btn-brand-primary {
      background: linear-gradient(135deg, var(--primary-green), #0EA5E9);
      color: #FFFFFF;
      font-weight: 700;
      padding: 12px 28px;
      border-radius: var(--btn-radius);
      border: none;
      box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3);
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .btn-brand-primary:hover {
      background: linear-gradient(135deg, #0D9668, #0284C7);
      color: #FFFFFF;
      transform: translateY(-2px);
      box-shadow: 0 8px 22px rgba(16, 185, 129, 0.4);
    }
    .btn-brand-outline {
      background: transparent;
      color: var(--bg-dark);
      border: 2px solid #CBD5E1;
      font-weight: 700;
      padding: 10px 24px;
      border-radius: var(--btn-radius);
    }
    .btn-brand-outline:hover {
      border-color: var(--primary-green);
      color: var(--primary-green);
      background: rgba(16, 185, 129, 0.05);
      transform: translateY(-2px);
    }

    /* ==========================================================
       板块 1：首屏 Hero 轮播（对比选型推荐档前置）
       ========================================================== */
    .hero-section {
      position: relative;
      background-color: var(--bg-dark);
      color: #FFFFFF;
      overflow: hidden;
    }
    .carousel-item-hero {
      min-height: 680px;
      position: relative;
      background-size: cover;
      background-position: center;
      display: flex;
      align-items: center;
    }
    .hero-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(105deg, rgba(11, 19, 21, 0.94) 0%, rgba(11, 19, 21, 0.82) 50%, rgba(6, 182, 212, 0.25) 100%);
    }
    .hero-plan-card {
      background: rgba(18, 31, 34, 0.88);
      border: 2px solid var(--primary-green);
      border-radius: 20px;
      padding: 30px;
      backdrop-filter: blur(16px);
      box-shadow: 0 20px 45px rgba(0, 0, 0, 0.45);
      position: relative;
      overflow: hidden;
    }
    .plan-top-ribbon {
      position: absolute;
      top: 18px;
      right: -32px;
      background: var(--primary-green);
      color: #070D0E;
      font-size: 0.72rem;
      font-weight: 800;
      padding: 4px 34px;
      transform: rotate(45deg);
      text-transform: uppercase;
    }

    /* ==========================================================
       板块 2：行业痛点与技术破局区
       ========================================================== */
    .pain-card {
      background: #FFFFFF;
      border-radius: var(--card-radius);
      padding: 24px;
      border-left: 4px solid #EF4444;
      box-shadow: var(--soft-shadow);
      margin-bottom: 20px;
    }
    .breakthrough-card {
      background: #FFFFFF;
      border-radius: var(--card-radius);
      padding: 24px;
      border-left: 4px solid var(--primary-green);
      box-shadow: var(--soft-shadow);
      margin-bottom: 20px;
    }

    /* ==========================================================
       板块 3：核心算法矩阵与架构解析
       ========================================================== */
    .tech-metric-pill {
      background: #EDF7F4;
      border: 1px dashed var(--primary-green);
      border-radius: 12px;
      padding: 16px 20px;
    }

    /* ==========================================================
       板块 4：核心能力全景网格（6 卡片）
       ========================================================== */
    .capability-card {
      background: #FFFFFF;
      border-radius: var(--card-radius);
      padding: 32px 24px;
      border: 1px solid #E2E8F0;
      transition: all 0.3s ease;
      position: relative;
      display: flex;
      flex-direction: column;
      height: 100%;
    }
    .capability-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--hover-shadow);
      border-color: rgba(16, 185, 129, 0.5);
    }
    .cap-num {
      position: absolute;
      top: 20px;
      right: 20px;
      font-size: 1.8rem;
      font-weight: 900;
      color: #E2E8F0;
      line-height: 1;
    }
    .cap-icon {
      width: 54px;
      height: 54px;
      border-radius: 12px;
      background: rgba(16, 185, 129, 0.1);
      color: var(--primary-green);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      margin-bottom: 20px;
    }

    /* ==========================================================
       板块 5：明星产品矩阵与算法套件
       ========================================================== */
    .product-tier-card {
      background: #FFFFFF;
      border-radius: 20px;
      padding: 36px 28px;
      border: 1px solid #E2E8F0;
      height: 100%;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      position: relative;
      transition: all 0.3s ease;
    }
    .product-tier-card.featured {
      border: 2px solid var(--accent-cyan);
      box-shadow: 0 15px 35px -5px rgba(6, 182, 212, 0.2);
    }

    /* ==========================================================
       板块 6：全沉浸暗色战术推演中心
       ========================================================== */
    .tactics-dark-section {
      background-color: var(--bg-dark);
      color: #FFFFFF;
      position: relative;
      overflow: hidden;
    }
    .tactics-board-mockup {
      background: var(--bg-dark-card);
      border: 1px solid var(--bg-dark-border);
      border-radius: 20px;
      padding: 24px;
      position: relative;
      box-shadow: 0 25px 60px rgba(0, 0, 0, 0.6);
    }
    .tactics-step-node {
      position: relative;
      padding-left: 50px;
      margin-bottom: 30px;
    }
    .tactics-step-icon {
      position: absolute;
      left: 0;
      top: 0;
      width: 38px;
      height: 38px;
      background: rgba(6, 182, 212, 0.15);
      border: 1px solid var(--accent-cyan);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--accent-cyan);
      font-weight: 700;
    }

    /* ==========================================================
       板块 7：职业俱乐部实战赋能图谱
       ========================================================== */
    .nav-pills-custom .nav-link {
      background: #FFFFFF;
      color: var(--text-main);
      font-weight: 700;
      border: 1px solid #CBD5E1;
      padding: 12px 24px;
      border-radius: 12px;
      margin-right: 12px;
      margin-bottom: 12px;
      transition: all 0.25s ease;
    }
    .nav-pills-custom .nav-link.active {
      background: var(--primary-green);
      color: #FFFFFF;
      border-color: var(--primary-green);
      box-shadow: 0 6px 18px rgba(16, 185, 129, 0.3);
    }

    /* ==========================================================
       板块 8：关键技术效能仪表盘（数据计数条）
       ========================================================== */
    .metrics-bar-section {
      background: linear-gradient(135deg, #062024, #0B1315);
      color: #FFFFFF;
      border-top: 1px solid rgba(16, 185, 129, 0.2);
      border-bottom: 1px solid rgba(16, 185, 129, 0.2);
    }
    .metric-value-display {
      font-size: 3rem;
      font-weight: 900;
      letter-spacing: -1px;
      line-height: 1.1;
      background: linear-gradient(120deg, #FFFFFF 30%, var(--accent-cyan));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    /* ==========================================================
       板块 9：客户证言与行业评价
       ========================================================== */
    .testimonial-card {
      background: #FFFFFF;
      border-radius: var(--card-radius);
      padding: 30px;
      border: 1px solid #E2E8F0;
      height: 100%;
      box-shadow: var(--soft-shadow);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    /* ==========================================================
       板块 10：前沿技术动态与科研资讯
       ========================================================== */
    .news-card-tech {
      background: #FFFFFF;
      border-radius: var(--card-radius);
      overflow: hidden;
      border: 1px solid #E2E8F0;
      height: 100%;
      transition: all 0.3s ease;
    }
    .news-card-tech:hover {
      transform: translateY(-5px);
      box-shadow: var(--hover-shadow);
    }
    .news-card-body {
      padding: 24px;
    }

    /* ==========================================================
       板块 11：技术与部署常见问题（手风琴 FAQ）
       ========================================================== */
    .accordion-custom .accordion-item {
      background: #FFFFFF;
      border: 1px solid #E2E8F0;
      border-radius: 12px !important;
      margin-bottom: 16px;
      overflow: hidden;
    }
    .accordion-custom .accordion-button {
      font-weight: 700;
      font-size: 1.05rem;
      color: var(--text-main);
      padding: 20px 24px;
      background: #FFFFFF;
    }
    .accordion-custom .accordion-button:not(.collapsed) {
      color: var(--primary-green);
      background: #F0FDF4;
      box-shadow: none;
    }
    .accordion-custom .accordion-button:focus {
      box-shadow: none;
    }
    .accordion-custom .accordion-body {
      color: var(--text-muted);
      padding: 0 24px 24px 24px;
      line-height: 1.75;
    }

    /* ==========================================================
       板块 12：商业落地与试用接入（表单 CTA）
       ========================================================== */
    .cta-inset-panel {
      background: linear-gradient(135deg, #0B1315 0%, #0F2A28 100%);
      border: 1px solid rgba(16, 185, 129, 0.3);
      border-radius: 24px;
      padding: 50px 40px;
      color: #FFFFFF;
      box-shadow: 0 25px 60px rgba(0, 0, 0, 0.25);
    }
    .form-control-custom {
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.2);
      color: #FFFFFF;
      border-radius: 8px;
      padding: 12px 16px;
    }
    .form-control-custom:focus {
      background: rgba(255, 255, 255, 0.12);
      border-color: var(--primary-green);
      color: #FFFFFF;
      box-shadow: 0 0 0 0.25rem rgba(16, 185, 129, 0.25);
    }
    .form-control-custom::placeholder {
      color: #94A3B8;
    }

    /* ==========================================================
       统一页脚（Footer）
       ========================================================== */
    .site-footer {
      background-color: #070D0E;
      color: #94A3B8;
      font-size: 0.9rem;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
    }
    .footer-heading {
      color: #FFFFFF;
      font-weight: 700;
      font-size: 1.05rem;
      margin-bottom: 20px;
    }
    .footer-link-item {
      margin-bottom: 10px;
    }
    .footer-link-item a:hover {
      color: var(--primary-green);
      padding-left: 4px;
    }
    .footer-bottom-bar {
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding: 24px 0;
      font-size: 0.85rem;
    }

    /* 移动端细微响应适配 */
    @media (max-width: 991.98px) {
      .section-padding { padding: 60px 0; }
      .section-title { font-size: 1.85rem; }
      .carousel-item-hero { min-height: auto; padding: 60px 0; }
      .cta-inset-panel { padding: 30px 20px; }
    }
    @media (max-width: 575.98px) {
      .metric-value-display { font-size: 2.2rem; }
      .command-box { display: none; }
    }