/* roulang page: index */
:root {
      --bg-main: #0B0F19;
      --bg-surface: #111827;
      --bg-surface-elevated: #1F2937;
      --brand-primary: #2563EB;
      --brand-gradient: linear-gradient(135deg, #2563EB 0%, #3B82F6 100%);
      --accent-cyan: #06B6D4;
      --accent-orange: #F97316;
      --text-primary: #F9FAFB;
      --text-secondary: #9CA3AF;
      --text-muted: #6B7280;
      --border-subtle: rgba(255, 255, 255, 0.08);
      --border-active: rgba(37, 99, 235, 0.5);
      --glass-bg: rgba(17, 24, 39, 0.75);
      --glow-shadow: 0 0 25px rgba(37, 99, 235, 0.35);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --radius-full: 9999px;
    }

    /* 基础 Reset 与规范 */
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      background-color: var(--bg-main);
      color: var(--text-primary);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.6;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }
    a {
      color: var(--text-secondary);
      text-decoration: none;
      transition: all 0.25s ease;
    }
    a:hover, a:focus {
      color: var(--accent-cyan);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    /* 顶部双行导航 (SaaS 命令栏风格) */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(11, 15, 25, 0.92);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border-subtle);
    }
    .top-sub-bar {
      background: #080C14;
      font-size: 13px;
      color: var(--text-muted);
      padding: 6px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    }
    .top-sub-bar .status-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: #10B981;
    }
    .top-sub-bar .status-dot {
      width: 8px;
      height: 8px;
      background-color: #10B981;
      border-radius: 50%;
      box-shadow: 0 0 8px #10B981;
    }
    .main-nav-bar {
      padding: 14px 0;
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 20px;
      font-weight: 700;
      color: var(--text-primary);
      letter-spacing: -0.5px;
    }
    .brand-logo i {
      color: #3B82F6;
      font-size: 24px;
      filter: drop-shadow(0 0 8px rgba(59, 130, 246, 0.5));
    }
    .nav-menu {
      display: flex;
      gap: 24px;
      list-style: none;
      margin: 0;
    }
    .nav-menu a {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-secondary);
      padding: 6px 2px;
      position: relative;
    }
    .nav-menu a:hover, .nav-menu a.active {
      color: var(--text-primary);
    }
    .nav-menu a.active::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--brand-primary);
      border-radius: 2px;
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .command-box {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-sm);
      padding: 6px 12px;
      display: flex;
      align-items: center;
      gap: 8px;
      color: var(--text-muted);
      font-size: 13px;
    }
    .btn-glow {
      background: var(--brand-gradient);
      color: #FFF !important;
      padding: 10px 22px;
      border-radius: var(--radius-full);
      font-weight: 600;
      font-size: 14px;
      display: inline-flex;
      align-items: center;
      gap: 8px;
      border: none;
      cursor: pointer;
      box-shadow: 0 0 20px rgba(37, 99, 235, 0.45);
      transition: all 0.3s ease;
    }
    .btn-glow:hover {
      box-shadow: 0 0 30px rgba(37, 99, 235, 0.7);
      transform: translateY(-2px);
    }
    .btn-outline {
      border: 1px solid var(--border-subtle);
      color: var(--text-primary);
      background: rgba(255, 255, 255, 0.03);
      padding: 10px 22px;
      border-radius: var(--radius-full);
      font-weight: 600;
      font-size: 14px;
      display: inline-flex;
      align-items: center;
      gap: 8px;
      cursor: pointer;
      transition: all 0.25s ease;
    }
    .btn-outline:hover {
      background: rgba(255, 255, 255, 0.08);
      border-color: rgba(255, 255, 255, 0.2);
      color: #FFF;
    }

    /* 布局容器与板块标准样式 */
    .section-wrap {
      padding: 85px 0;
      position: relative;
    }
    .section-wrap.alt-bg {
      background-color: var(--bg-surface);
      border-top: 1px solid var(--border-subtle);
      border-bottom: 1px solid var(--border-subtle);
    }
    .section-header {
      margin-bottom: 48px;
    }
    .section-tag {
      display: inline-block;
      font-size: 12px;
      font-weight: 600;
      color: var(--accent-cyan);
      text-transform: uppercase;
      letter-spacing: 1.5px;
      margin-bottom: 10px;
      background: rgba(6, 182, 212, 0.1);
      padding: 4px 12px;
      border-radius: 999px;
      border: 1px solid rgba(6, 182, 212, 0.2);
    }
    .section-title {
      font-size: 32px;
      font-weight: 700;
      color: var(--text-primary);
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }
    .section-desc {
      color: var(--text-secondary);
      font-size: 16px;
      max-width: 780px;
      line-height: 1.7;
    }

    /* 玻璃拟态卡片通用定义 */
    .glass-card {
      background: var(--glass-bg);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 30px;
      transition: all 0.35s cubic-bezier(0.165, 0.84, 0.44, 1);
      height: 100%;
    }
    .glass-card:hover {
      transform: translateY(-4px);
      border-color: var(--border-active);
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
    }

    /* 板块 1: Hero 首屏（对比选型，推荐档高亮前置） */
    .hero-section {
      position: relative;
      padding: 100px 0 90px;
      background: linear-gradient(180deg, rgba(11, 15, 25, 0.7) 0%, #0B0F19 100%),
                  url('/assets/images/3a6f6a571fb22887.jpg') center/cover no-repeat;
      overflow: hidden;
    }
    .hero-lead-text {
      margin-bottom: 40px;
    }
    .hero-h1 {
      font-size: 44px;
      line-height: 1.25;
      font-weight: 800;
      color: #FFF;
      margin-bottom: 22px;
      letter-spacing: -1px;
    }
    .hero-desc {
      font-size: 16px;
      color: var(--text-secondary);
      line-height: 1.8;
      max-width: 820px;
    }
    .hero-pricing-matrix {
      margin-top: 30px;
    }
    .tier-card {
      background: rgba(17, 24, 39, 0.85);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 32px 24px;
      position: relative;
    }
    .tier-card.featured {
      border: 2px solid var(--brand-primary);
      background: rgba(23, 37, 84, 0.6);
      box-shadow: 0 0 35px rgba(37, 99, 235, 0.35);
      transform: scale(1.03);
      z-index: 2;
    }
    .tier-badge {
      position: absolute;
      top: -14px;
      right: 24px;
      background: var(--brand-gradient);
      color: #FFF;
      font-size: 12px;
      font-weight: 700;
      padding: 4px 14px;
      border-radius: 999px;
      box-shadow: 0 4px 10px rgba(0,0,0,0.3);
    }
    .tier-name {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .tier-target {
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 20px;
      min-height: 40px;
    }
    .tier-specs {
      list-style: none;
      margin: 0 0 24px 0;
      font-size: 14px;
      color: var(--text-secondary);
    }
    .tier-specs li {
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .tier-specs li i {
      color: #10B981;
      font-size: 13px;
    }

    /* 板块 2: 指标看板与性能区 (#metrics) */
    .metric-box {
      text-align: center;
      padding: 24px 16px;
      border-right: 1px solid var(--border-subtle);
    }
    .metric-box:last-child {
      border-right: none;
    }
    .metric-value {
      font-size: 42px;
      font-weight: 800;
      font-variant-numeric: tabular-nums;
      color: var(--text-primary);
      margin-bottom: 6px;
      line-height: 1;
    }
    .metric-unit {
      font-size: 16px;
      color: var(--accent-cyan);
      font-weight: 500;
      margin-left: 4px;
    }
    .metric-label {
      font-size: 14px;
      color: var(--text-secondary);
      margin-bottom: 4px;
      font-weight: 600;
    }
    .metric-sub {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 板块 3: 入口矩阵与系统能力分类 (#entry-matrix) */
    .entry-card {
      background: var(--glass-bg);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      height: 100%;
    }
    .entry-icon {
      font-size: 26px;
      color: var(--accent-cyan);
      margin-bottom: 16px;
    }

    /* 板块 4: 最新动态流与状态监控 (#latest-feed) */
    .table-feed {
      width: 100%;
      border-collapse: separate;
      border-spacing: 0 8px;
    }
    .table-feed tr {
      background: rgba(255, 255, 255, 0.02);
      border-radius: var(--radius-sm);
      transition: background 0.2s;
    }
    .table-feed tr:hover {
      background: rgba(255, 255, 255, 0.05);
    }
    .table-feed td {
      padding: 16px 20px;
      color: var(--text-secondary);
      font-size: 14px;
      border-top: 1px solid var(--border-subtle);
      border-bottom: 1px solid var(--border-subtle);
    }
    .table-feed td:first-child {
      border-left: 1px solid var(--border-subtle);
      border-top-left-radius: var(--radius-sm);
      border-bottom-left-radius: var(--radius-sm);
      font-weight: 600;
      color: var(--text-primary);
    }
    .table-feed td:last-child {
      border-right: 1px solid var(--border-subtle);
      border-top-right-radius: var(--radius-sm);
      border-bottom-right-radius: var(--radius-sm);
      text-align: right;
    }

    /* 板块 5: 架构与技术底座 (#architecture) */
    .arch-feature {
      display: flex;
      gap: 16px;
      margin-bottom: 24px;
    }
    .arch-feature-icon {
      flex-shrink: 0;
      width: 44px;
      height: 44px;
      border-radius: 10px;
      background: rgba(37, 99, 235, 0.15);
      border: 1px solid rgba(37, 99, 235, 0.3);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #3B82F6;
      font-size: 18px;
    }

    /* 板块 6: 核心优势六格网格 (#advantages) */
    .adv-icon {
      font-size: 28px;
      color: var(--brand-primary);
      margin-bottom: 16px;
    }

    /* 板块 7: 业务场景方案矩阵 (#solutions) */
    .solution-card-img {
      border-radius: var(--radius-sm);
      overflow: hidden;
      margin-bottom: 20px;
      height: 180px;
    }
    .solution-card-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .glass-card:hover .solution-card-img img {
      transform: scale(1.05);
    }

    /* 板块 8: 传统对比高下立判 (#comparison) */
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      border-radius: var(--radius-md);
      overflow: hidden;
    }
    .compare-table th, .compare-table td {
      padding: 18px 24px;
      text-align: left;
      border-bottom: 1px solid var(--border-subtle);
    }
    .compare-table th {
      background: rgba(31, 41, 55, 0.8);
      font-size: 15px;
      color: var(--text-primary);
    }
    .compare-table td {
      background: rgba(17, 24, 39, 0.6);
      font-size: 14px;
    }
    .compare-table .highlight-col {
      background: rgba(37, 99, 235, 0.1);
      color: #FFF;
      font-weight: 600;
      border-left: 1px solid rgba(37, 99, 235, 0.3);
      border-right: 1px solid rgba(37, 99, 235, 0.3);
    }

    /* 板块 9: 大型赛事里程碑与实践记录 (#cases) */
    .timeline-stream {
      position: relative;
      padding-left: 36px;
    }
    .timeline-stream::before {
      content: '';
      position: absolute;
      top: 0;
      bottom: 0;
      left: 14px;
      width: 2px;
      background: linear-gradient(180deg, var(--brand-primary) 0%, rgba(37, 99, 235, 0.1) 100%);
    }
    .timeline-node {
      position: relative;
      margin-bottom: 36px;
    }
    .timeline-node::before {
      content: '';
      position: absolute;
      left: -30px;
      top: 6px;
      width: 14px;
      height: 14px;
      border-radius: 50%;
      background: #0B0F19;
      border: 3px solid #3B82F6;
    }

    /* 板块 10: 多端联动与硬件终端 (#endpoints) */
    .endpoint-badge-list {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 16px;
    }
    .endpoint-badge {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid var(--border-subtle);
      padding: 8px 16px;
      border-radius: var(--radius-sm);
      font-size: 13px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    /* 板块 11: 行业资讯与技术快讯 (#news) */
    .news-card-date {
      font-size: 12px;
      color: var(--text-muted);
      margin-bottom: 8px;
    }
    .news-card-title {
      font-size: 17px;
      font-weight: 700;
      color: var(--text-primary);
      margin-bottom: 12px;
      line-height: 1.4;
    }

    /* 板块 12: 异议拆解与运营顾虑回应 (#objections) */
    .objection-card {
      background: rgba(17, 24, 39, 0.6);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 24px;
      margin-bottom: 20px;
    }
    .objection-q {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      font-size: 16px;
      font-weight: 700;
      color: var(--accent-orange);
      margin-bottom: 12px;
    }
    .objection-a {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.7;
      padding-left: 28px;
    }

    /* 板块 13: 平台底层安全与合规保障 (#security) */
    .sec-shield-box {
      text-align: center;
      padding: 30px 20px;
    }
    .sec-shield-icon {
      font-size: 36px;
      color: #10B981;
      margin-bottom: 18px;
    }

    /* 板块 14: 快速解答与 FAQ (#faq) */
    .faq-accordion-item {
      background: rgba(17, 24, 39, 0.5);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-sm);
      margin-bottom: 14px;
      overflow: hidden;
    }
    .faq-title {
      padding: 20px 24px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 16px;
      font-weight: 600;
      color: var(--text-primary);
    }
    .faq-body {
      padding: 0 24px 20px;
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.7;
    }

    /* 板块 15: 统一收口与预约测试表单 (#contact) */
    .contact-container {
      max-width: 860px;
      margin: 0 auto;
      background: linear-gradient(180deg, rgba(31, 41, 55, 0.7) 0%, rgba(17, 24, 39, 0.95) 100%);
      border: 1px solid var(--border-active);
      border-radius: var(--radius-lg);
      padding: 48px;
      box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
    }
    .form-input, .form-select {
      width: 100%;
      background: rgba(11, 15, 25, 0.8) !important;
      border: 1px solid var(--border-subtle) !important;
      border-radius: var(--radius-sm) !important;
      color: #FFF !important;
      padding: 12px 16px !important;
      margin-bottom: 18px !important;
      height: 48px !important;
    }
    .form-input:focus, .form-select:focus {
      border-color: var(--brand-primary) !important;
      box-shadow: 0 0 10px rgba(37, 99, 235, 0.4) !important;
    }
    .form-label {
      font-size: 13px;
      font-weight: 600;
      color: var(--text-secondary);
      margin-bottom: 8px;
      display: block;
    }

    /* 全局页脚 (Footer) */
    .site-footer {
      background: #070A10;
      border-top: 1px solid var(--border-subtle);
      padding: 70px 0 30px;
      font-size: 14px;
      color: var(--text-muted);
    }
    .footer-col-title {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-primary);
      margin-bottom: 20px;
    }
    .footer-links {
      list-style: none;
      margin: 0;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-bottom {
      margin-top: 50px;
      padding-top: 25px;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
    }

    /* 移动端与自适应调整 */
    @media (max-width: 1024px) {
      .nav-menu { display: none; }
      .hero-h1 { font-size: 36px; }
      .metric-box { border-right: none; border-bottom: 1px solid var(--border-subtle); }
    }
    @media (max-width: 640px) {
      .hero-h1 { font-size: 28px; }
      .contact-container { padding: 24px; }
      .compare-table { display: block; overflow-x: auto; }
      .section-wrap { padding: 60px 0; }
    }