/* roulang page: index */
:root {
      --primary: #0F3E7A;
      --primary-dark: #08172E;
      --primary-light: #1D58A6;
      --accent-blue: #00A3E0;
      --accent-green: #00D084;
      --accent-orange: #FF6B35;
      --bg-base: #F8FAFC;
      --bg-card: #FFFFFF;
      --text-main: #0F172A;
      --text-muted: #475569;
      --text-sub: #94A3B8;
      --border-color: #E2E8F0;
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --shadow-soft: 0 10px 30px -5px rgba(15, 62, 122, 0.07), 0 4px 6px -2px rgba(15, 62, 122, 0.04);
      --shadow-hover: 0 20px 40px -8px rgba(15, 62, 122, 0.14), 0 8px 12px -3px rgba(15, 62, 122, 0.06);
      --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    * { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg-base);
      color: var(--text-main);
      line-height: 1.65;
      overflow-x: hidden;
    }
    a { text-decoration: none; color: inherit; transition: var(--transition-smooth); }
    img { max-width: 100%; height: auto; display: block; }

    /* 顶部微型工具栏 */
    .top-toolbar {
      background-color: #0B2545;
      color: #94A3B8;
      font-size: 0.82rem;
      padding: 6px 0;
      border-bottom: 1px solid rgba(255,255,255,0.08);
    }
    .lang-pill {
      display: inline-flex;
      align-items: center;
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: 20px;
      padding: 2px 8px;
      font-size: 0.75rem;
    }
    .lang-pill .active { color: #fff; font-weight: 600; }
    .lang-pill span { color: #64748B; margin: 0 4px; }

    /* 主导航栏 */
    .site-header {
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      box-shadow: 0 2px 15px rgba(15, 62, 122, 0.06);
      position: sticky;
      top: 0;
      z-index: 1020;
    }
    .navbar-brand-logo {
      font-size: 1.35rem;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -0.5px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .navbar-brand-logo .logo-dot {
      width: 10px;
      height: 10px;
      background: var(--accent-green);
      border-radius: 50%;
      display: inline-block;
    }
    .nav-link {
      font-weight: 500;
      color: var(--text-muted) !important;
      font-size: 0.95rem;
      padding: 0.5rem 0.9rem !important;
      border-radius: var(--radius-sm);
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary) !important;
      background: rgba(15, 62, 122, 0.04);
    }

    /* 通用组件 */
    .btn-brand-primary {
      background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
      color: #fff;
      font-weight: 600;
      padding: 10px 24px;
      border-radius: var(--radius-sm);
      border: none;
      box-shadow: 0 4px 14px rgba(15, 62, 122, 0.25);
    }
    .btn-brand-primary:hover {
      color: #fff;
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(15, 62, 122, 0.35);
    }
    .btn-brand-outline {
      border: 1.5px solid var(--primary);
      color: var(--primary);
      font-weight: 600;
      padding: 9px 22px;
      border-radius: var(--radius-sm);
      background: transparent;
    }
    .btn-brand-outline:hover {
      background: var(--primary);
      color: #fff;
    }
    .section-tag {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 700;
      letter-spacing: 0.05em;
      color: var(--primary);
      background: rgba(15, 62, 122, 0.08);
      padding: 4px 12px;
      border-radius: 20px;
      margin-bottom: 12px;
    }
    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 14px;
      letter-spacing: -0.5px;
    }
    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
      max-width: 760px;
      margin: 0 auto 36px auto;
    }
    .card-tech {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-soft);
      transition: var(--transition-smooth);
      height: 100%;
      overflow: hidden;
    }
    .card-tech:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(15, 62, 122, 0.2);
    }

    /* 板块 1: Hero 新品发布与倒计时环 */
    .hero-section {
      background: linear-gradient(135deg, rgba(8, 23, 46, 0.95) 0%, rgba(15, 62, 122, 0.9) 100%),
                  url('/assets/images/d5c2a228adff3857.jpg') center/cover no-repeat;
      color: #fff;
      padding: 90px 0 80px 0;
      position: relative;
    }
    .hero-h1 {
      font-size: 2.9rem;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 20px;
    }
    .hero-lead {
      font-size: 1.08rem;
      color: #CBD5E1;
      margin-bottom: 30px;
      line-height: 1.8;
      max-width: 620px;
    }
    .countdown-ring-card {
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.15);
      backdrop-filter: blur(16px);
      border-radius: var(--radius-lg);
      padding: 30px;
      text-align: center;
      box-shadow: 0 20px 40px rgba(0,0,0,0.3);
    }
    .countdown-timer {
      display: flex;
      justify-content: center;
      gap: 14px;
      margin: 20px 0;
    }
    .timer-unit {
      background: rgba(0, 0, 0, 0.35);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-sm);
      min-width: 64px;
      padding: 10px 4px;
    }
    .timer-val {
      font-size: 1.7rem;
      font-weight: 800;
      color: var(--accent-green);
      line-height: 1;
    }
    .timer-label {
      font-size: 0.72rem;
      color: #94A3B8;
      margin-top: 4px;
    }

    /* 板块 2: 秒杀闪购轨 */
    .flash-sale-bar {
      background: #FFFFFF;
      border-bottom: 1px solid var(--border-color);
      padding: 32px 0;
    }
    .stock-badge {
      font-size: 0.75rem;
      padding: 3px 8px;
      border-radius: 4px;
      background: #FFF1EE;
      color: var(--accent-orange);
      font-weight: 700;
      border: 1px solid #FFD8CE;
    }
    .progress-stock {
      height: 6px;
      border-radius: 3px;
      background-color: #E2E8F0;
      margin: 8px 0;
    }
    .progress-stock-bar {
      height: 100%;
      background: linear-gradient(90deg, #FF6B35, #FF4500);
      border-radius: 3px;
      width: 82%;
    }

    /* 板块 3: 合集目录 */
    .catalog-section { padding: 80px 0; background: #F8FAFC; }
    .catalog-item-card {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      background: #fff;
      padding: 24px;
      transition: var(--transition-smooth);
      height: 100%;
    }
    .catalog-item-card:hover {
      border-color: var(--primary);
      box-shadow: var(--shadow-soft);
    }
    .catalog-index {
      font-size: 1.5rem;
      font-weight: 800;
      color: rgba(15, 62, 122, 0.18);
      line-height: 1;
    }

    /* 板块 4: 相关推荐 */
    .recommend-section { padding: 80px 0; background: #FFFFFF; }
    .product-img-wrap {
      height: 220px;
      overflow: hidden;
      background: #EDF2F7;
      position: relative;
    }
    .product-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: var(--transition-smooth);
    }
    .card-tech:hover .product-img-wrap img {
      transform: scale(1.05);
    }
    .tag-protocol {
      position: absolute;
      top: 12px;
      left: 12px;
      background: rgba(15, 23, 42, 0.75);
      backdrop-filter: blur(6px);
      color: #fff;
      font-size: 0.72rem;
      padding: 3px 8px;
      border-radius: 4px;
    }

    /* 板块 5: 核心科技与运动理念沉浸区 (深色反差) */
    .deep-concept-section {
      background: linear-gradient(180deg, #08172E 0%, #0D2345 100%);
      color: #fff;
      padding: 95px 0;
      position: relative;
    }
    .tech-pill-spec {
      background: rgba(255, 255, 255, 0.06);
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: var(--radius-md);
      padding: 22px;
    }
    .tech-pill-spec h5 { font-size: 1.15rem; color: #38BDF8; margin-bottom: 8px; }

    /* 板块 6: 场景化部署与流程 */
    .deploy-section { padding: 80px 0; background: #F8FAFC; }
    .step-badge {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.1rem;
      margin-bottom: 16px;
      box-shadow: 0 4px 10px rgba(15, 62, 122, 0.25);
    }

    /* 板块 7: 智能运动设备前沿资讯 */
    .news-section { padding: 80px 0; background: #FFFFFF; }
    .news-date { font-size: 0.8rem; color: var(--text-sub); }

    /* 板块 8: 收藏分享与技术选型清单 */
    .share-fav-section { padding: 75px 0; background: #F1F5F9; }
    .checklist-box {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      padding: 30px;
    }

    /* 板块 9: 专题索引与架构图谱 */
    .index-matrix-section { padding: 80px 0; background: #FFFFFF; }
    .matrix-link-card {
      border: 1px dashed #CBD5E1;
      border-radius: var(--radius-sm);
      padding: 18px;
      background: #FAFAFA;
      transition: var(--transition-smooth);
    }
    .matrix-link-card:hover {
      border-color: var(--primary);
      background: #EFF6FF;
    }

    /* 板块 10: 关键性能与运行数据看板 */
    .metrics-strip {
      background: #0F3E7A;
      color: #fff;
      padding: 60px 0;
    }
    .metric-number {
      font-size: 2.7rem;
      font-weight: 800;
      line-height: 1;
      color: var(--accent-green);
    }
    .metric-title { font-size: 0.95rem; color: #CBD5E1; margin-top: 6px; }

    /* 板块 11: 典型用户实践故事与数据看板 */
    .story-section { padding: 85px 0; background: #F8FAFC; }
    .story-chart-box {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-soft);
    }

    /* 板块 12: 用户口碑与实测反馈 */
    .reviews-section { padding: 80px 0; background: #FFFFFF; }
    .review-bubble {
      background: #F8FAFC;
      border-radius: var(--radius-md);
      padding: 24px;
      border: 1px solid var(--border-color);
      height: 100%;
    }
    .star-rating { color: #EAB308; font-size: 0.9rem; margin-bottom: 8px; }

    /* 板块 13: 常见技术异议与解答 (FAQ) */
    .faq-section { padding: 80px 0; background: #F8FAFC; }
    .accordion-button:not(.collapsed) {
      color: var(--primary);
      background-color: rgba(15, 62, 122, 0.05);
      box-shadow: none;
    }
    .accordion-button:focus { box-shadow: none; border-color: rgba(15, 62, 122, 0.15); }
    .accordion-item { border: 1px solid var(--border-color); margin-bottom: 10px; border-radius: var(--radius-sm) !important; overflow: hidden; }

    /* 板块 14: 预约体验与高转化收口 */
    .cta-final-section {
      padding: 85px 0;
      background: linear-gradient(135deg, #0B2545 0%, #15437B 100%);
      color: #fff;
      text-align: center;
    }
    .cta-box-card {
      max-width: 820px;
      margin: 0 auto;
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.12);
      backdrop-filter: blur(14px);
      border-radius: var(--radius-lg);
      padding: 45px 35px;
    }

    /* 页脚 */
    .site-footer {
      background: #08172E;
      color: #94A3B8;
      padding: 70px 0 25px 0;
      font-size: 0.9rem;
      border-top: 1px solid rgba(255,255,255,0.08);
    }
    .footer-col-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 18px;
    }
    .footer-links li { margin-bottom: 10px; list-style: none; }
    .footer-links a:hover { color: #38BDF8; }
    .footer-bottom {
      margin-top: 50px;
      padding-top: 25px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 0.8rem;
    }

    @media (max-width: 991px) {
      .hero-h1 { font-size: 2.2rem; }
      .section-title { font-size: 1.8rem; }
      .countdown-ring-card { margin-top: 40px; }
    }
    @media (max-width: 576px) {
      .hero-h1 { font-size: 1.8rem; }
      .timer-unit { min-width: 52px; padding: 6px 2px; }
      .timer-val { font-size: 1.35rem; }
      .metric-number { font-size: 2rem; }
    }