/* roulang page: index */
:root {
      --st-primary: #0b132b;
      --st-accent: #00e599;
      --st-accent-hover: #00f0b5;
      --st-dark-surface: #111827;
      --st-dark-card: #1a2236;
      --st-neutral-light: #f4f6fa;
      --st-white: #ffffff;
      --st-text-main: #1f2937;
      --st-text-muted: #6b7280;
      --st-border: #e5e7eb;
      --st-radius: 10px;
      --st-shadow: 0 6px 24px rgba(11, 19, 43, 0.06);
      --st-shadow-hover: 0 12px 32px rgba(0, 229, 153, 0.16);
      --st-transition: all 0.28s ease-in-out;
    }
    *, *::before, *::after { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      padding: 0;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--st-text-main);
      background-color: var(--st-white);
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
    }
    a { color: inherit; text-decoration: none; transition: var(--st-transition); }
    a:hover, a:focus { color: var(--st-accent); }
    img { max-width: 100%; height: auto; display: block; border-radius: var(--st-radius); }

    /* 顶部地图/网点定位双行导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 999;
      background: rgba(11, 19, 43, 0.98);
      backdrop-filter: blur(10px);
      box-shadow: 0 4px 20px rgba(0,0,0,0.15);
    }
    .header-top-bar {
      border-bottom: 1px solid rgba(255,255,255,0.08);
      padding: 6px 0;
      font-size: 0.82rem;
      color: #94a3b8;
    }
    .header-top-bar a { color: #cbd5e1; }
    .header-top-bar a:hover { color: var(--st-accent); }
    .header-location-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: rgba(0, 229, 153, 0.12);
      color: var(--st-accent);
      padding: 2px 10px;
      border-radius: 20px;
      font-weight: 500;
    }
    .header-nav-main {
      padding: 12px 0;
    }
    .brand-logo-txt {
      font-size: 1.35rem;
      font-weight: 800;
      color: var(--st-white);
      letter-spacing: 0.5px;
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .brand-logo-txt span.brand-dot {
      display: inline-block;
      width: 10px;
      height: 10px;
      background: var(--st-accent);
      border-radius: 50%;
      box-shadow: 0 0 10px var(--st-accent);
    }
    .nav-links-list {
      margin: 0;
      padding: 0;
      list-style: none;
      display: flex;
      align-items: center;
      gap: 24px;
    }
    .nav-links-list li a {
      color: #e2e8f0;
      font-size: 0.94rem;
      font-weight: 500;
      padding: 6px 0;
      position: relative;
    }
    .nav-links-list li a.active,
    .nav-links-list li a:hover {
      color: var(--st-accent);
    }
    .nav-links-list li a.active::after,
    .nav-links-list li a:hover::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--st-accent);
    }
    .btn-header-cta {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: var(--st-accent);
      color: var(--st-primary);
      font-weight: 700;
      padding: 8px 18px;
      border-radius: 6px;
      font-size: 0.88rem;
      transition: var(--st-transition);
      border: 1px solid var(--st-accent);
    }
    .btn-header-cta:hover {
      background: var(--st-accent-hover);
      color: var(--st-primary);
      transform: translateY(-1px);
      box-shadow: 0 4px 14px rgba(0,229,153,0.35);
    }

    /* 移动端汉堡切换 */
    .mobile-nav-toggle {
      display: none;
      background: none;
      border: none;
      color: var(--st-white);
      font-size: 1.5rem;
      cursor: pointer;
      padding: 4px;
    }

    /* Section 通用规范与交替背景 */
    .sec-wrap {
      padding: 80px 0;
      position: relative;
    }
    .sec-light-alt {
      background-color: var(--st-neutral-light);
    }
    .sec-dark-bg {
      background-color: var(--st-dark-surface);
      color: var(--st-white);
    }
    .sec-header {
      margin-bottom: 44px;
    }
    .sec-eyebrow {
      text-transform: uppercase;
      font-size: 0.8rem;
      letter-spacing: 1.5px;
      font-weight: 700;
      color: var(--st-accent);
      display: block;
      margin-bottom: 8px;
    }
    .sec-title {
      font-size: 2.1rem;
      font-weight: 800;
      margin-bottom: 14px;
      line-height: 1.25;
      color: inherit;
    }
    .sec-subtitle {
      font-size: 1.02rem;
      color: var(--st-text-muted);
      max-width: 820px;
      line-height: 1.7;
    }
    .sec-dark-bg .sec-subtitle {
      color: #94a3b8;
    }

    /* 按钮通用组件 */
    .btn-primary-action {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: var(--st-accent);
      color: var(--st-primary);
      font-weight: 700;
      padding: 13px 26px;
      border-radius: 6px;
      font-size: 0.95rem;
      transition: var(--st-transition);
      cursor: pointer;
      border: 1px solid var(--st-accent);
    }
    .btn-primary-action:hover {
      background: var(--st-accent-hover);
      color: var(--st-primary);
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(0,229,153,0.3);
    }
    .btn-secondary-action {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: transparent;
      color: var(--st-white);
      font-weight: 600;
      padding: 13px 26px;
      border-radius: 6px;
      font-size: 0.95rem;
      border: 1px solid rgba(255,255,255,0.3);
      transition: var(--st-transition);
      cursor: pointer;
    }
    .btn-secondary-action:hover {
      background: rgba(255,255,255,0.1);
      border-color: var(--st-accent);
      color: var(--st-accent);
    }

    /* 卡片通用 */
    .card-base {
      background: var(--st-white);
      border-radius: var(--st-radius);
      box-shadow: var(--st-shadow);
      padding: 30px;
      border: 1px solid var(--st-border);
      transition: var(--st-transition);
      height: 100%;
      display: flex;
      flex-direction: column;
    }
    .card-base:hover {
      transform: translateY(-4px);
      box-shadow: var(--st-shadow-hover);
      border-color: rgba(0, 229, 153, 0.4);
    }
    .card-dark-item {
      background: var(--st-dark-card);
      border: 1px solid rgba(255,255,255,0.08);
      border-radius: var(--st-radius);
      padding: 28px;
      transition: var(--st-transition);
      height: 100%;
    }
    .card-dark-item:hover {
      transform: translateY(-4px);
      border-color: var(--st-accent);
      box-shadow: 0 10px 30px rgba(0,0,0,0.4);
    }

    /* 板块 1: Hero Section (白皮书获客与体测预约架构) */
    .hero-banner-sec {
      background: linear-gradient(135deg, rgba(11, 19, 43, 0.96) 0%, rgba(17, 24, 39, 0.92) 100%),
                  url('/assets/images/cbd237b5710a6ef5.jpg') center/cover no-repeat;
      color: var(--st-white);
      padding: 85px 0 95px;
      border-bottom: 2px solid rgba(0,229,153,0.3);
    }
    .hero-h1-main {
      font-size: 2.7rem;
      font-weight: 800;
      line-height: 1.22;
      margin-bottom: 18px;
      letter-spacing: -0.5px;
    }
    .hero-p-desc {
      font-size: 1.05rem;
      line-height: 1.75;
      color: #cbd5e1;
      margin-bottom: 30px;
    }
    .hero-action-row {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      align-items: center;
      margin-bottom: 35px;
    }
    .hero-badge-tag {
      display: inline-block;
      background: rgba(0,229,153,0.15);
      border: 1px solid var(--st-accent);
      color: var(--st-accent);
      font-size: 0.8rem;
      font-weight: 600;
      padding: 4px 14px;
      border-radius: 20px;
      margin-bottom: 14px;
    }
    .hero-doc-card {
      background: rgba(26, 34, 54, 0.85);
      backdrop-filter: blur(12px);
      border: 1px solid rgba(0,229,153,0.3);
      border-radius: 12px;
      padding: 32px 28px;
      box-shadow: 0 18px 45px rgba(0,0,0,0.35);
    }
    .doc-badge {
      background: var(--st-accent);
      color: var(--st-primary);
      font-size: 0.76rem;
      font-weight: 700;
      padding: 3px 8px;
      border-radius: 4px;
      display: inline-block;
      margin-bottom: 12px;
    }
    .doc-toc-list {
      margin: 18px 0;
      padding-left: 18px;
      color: #cbd5e1;
      font-size: 0.9rem;
      line-height: 1.8;
    }

    /* 板块 2: 运动数字化痛点反思 */
    .pain-card {
      border-top: 4px solid #ef4444;
    }
    .pain-card .pain-tag {
      font-size: 0.78rem;
      color: #ef4444;
      font-weight: 700;
      margin-bottom: 8px;
      display: inline-block;
    }

    /* 板块 3: 品牌与硬核体育科技解决方案 */
    .solution-spec-box {
      background: var(--st-neutral-light);
      border-radius: 8px;
      padding: 16px 20px;
      margin-top: 20px;
      border-left: 3px solid var(--st-accent);
    }
    .spec-item-row {
      display: flex;
      justify-content: space-between;
      padding: 6px 0;
      font-size: 0.88rem;
      border-bottom: 1px dashed #d1d5db;
    }
    .spec-item-row:last-child { border-bottom: none; }

    /* 板块 4: 核心科技优势矩阵 */
    .advantage-card .adv-icon-box {
      width: 48px;
      height: 48px;
      border-radius: 8px;
      background: rgba(0, 229, 153, 0.12);
      color: #059669;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1.2rem;
      margin-bottom: 16px;
    }

    /* 板块 5: 热门智能硬件与软件 */
    .product-img-box {
      height: 190px;
      overflow: hidden;
      border-radius: 8px;
      margin-bottom: 18px;
      position: relative;
    }
    .product-img-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .product-card:hover .product-img-box img {
      transform: scale(1.04);
    }
    .prod-spec-badge {
      display: inline-block;
      background: #e2e8f0;
      font-size: 0.76rem;
      color: var(--st-text-main);
      padding: 3px 8px;
      border-radius: 4px;
      margin-right: 6px;
      margin-bottom: 6px;
    }

    /* 板块 6: 实施步骤 */
    .step-number-bubble {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--st-accent);
      color: var(--st-primary);
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 14px;
      box-shadow: 0 4px 12px rgba(0,229,153,0.35);
    }

    /* 板块 7: 实战案例深色区 */
    .case-card-img {
      height: 180px;
      overflow: hidden;
      border-radius: 8px;
      margin-bottom: 14px;
    }
    .case-card-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    /* 板块 8: 核心量化数据条 */
    .metrics-bar-wrap {
      background: linear-gradient(90deg, #0b132b 0%, #16203d 100%);
      padding: 55px 0;
      color: var(--st-white);
      border-top: 1px solid rgba(0,229,153,0.2);
      border-bottom: 1px solid rgba(0,229,153,0.2);
    }
    .metric-val-num {
      font-size: 2.8rem;
      font-weight: 800;
      color: var(--st-accent);
      line-height: 1.1;
      font-family: monospace, sans-serif;
    }

    /* 板块 9: 评价证言区 */
    .quote-card {
      position: relative;
      border-left: 4px solid var(--st-accent);
    }
    .quote-source {
      margin-top: 16px;
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .quote-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #e2e8f0;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--st-primary);
    }

    /* 板块 10: 适用人群象限 */
    .audience-card {
      border: 1px solid #e2e8f0;
      background: var(--st-white);
    }
    .audience-flag {
      background: rgba(11, 19, 43, 0.06);
      color: var(--st-primary);
      padding: 2px 8px;
      border-radius: 4px;
      font-size: 0.78rem;
      font-weight: 600;
      display: inline-block;
      margin-bottom: 8px;
    }

    /* 板块 11: 资讯动态区 */
    .news-card-date {
      font-size: 0.8rem;
      color: var(--st-text-muted);
      margin-bottom: 6px;
    }

    /* 板块 12: FAQ 手风琴折叠面板 */
    .faq-accordion-item {
      background: var(--st-white);
      border: 1px solid var(--st-border);
      border-radius: 8px;
      margin-bottom: 12px;
      overflow: hidden;
    }
    .faq-accordion-title {
      padding: 18px 24px;
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--st-primary);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
      background: #fff;
    }
    .faq-accordion-title:hover {
      background: #f8fafc;
    }
    .faq-accordion-title::after {
      content: '+';
      font-size: 1.3rem;
      color: var(--st-accent);
      font-weight: 700;
      transition: transform 0.25s ease;
    }
    .faq-accordion-item.active .faq-accordion-title::after {
      content: '-';
      transform: rotate(180deg);
    }
    .faq-accordion-content {
      padding: 0 24px;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      color: var(--st-text-muted);
      font-size: 0.94rem;
      line-height: 1.75;
      background: #fafafa;
    }
    .faq-accordion-item.active .faq-accordion-content {
      padding: 16px 24px 22px;
      max-height: 300px;
    }

    /* 底部收口预约表单 CTA */
    .cta-booking-sec {
      background: linear-gradient(135deg, #0b132b 0%, #131d3d 100%);
      color: var(--st-white);
      padding: 70px 0;
      border-top: 3px solid var(--st-accent);
    }
    .booking-form-box {
      background: var(--st-dark-card);
      border: 1px solid rgba(255,255,255,0.12);
      border-radius: var(--st-radius);
      padding: 28px;
    }
    .booking-input, .booking-select {
      width: 100%;
      height: 44px;
      border-radius: 6px;
      border: 1px solid rgba(255,255,255,0.18);
      background: rgba(255,255,255,0.06);
      color: var(--st-white);
      padding: 0 14px;
      margin-bottom: 14px;
      font-size: 0.92rem;
    }
    .booking-select option {
      background: #1a2236;
      color: #fff;
    }
    .booking-input:focus, .booking-select:focus {
      border-color: var(--st-accent);
      outline: none;
    }

    /* 页脚 */
    .site-footer {
      background: #080d1e;
      color: #94a3b8;
      padding: 60px 0 24px;
      font-size: 0.88rem;
      border-top: 1px solid rgba(255,255,255,0.06);
    }
    .footer-col-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--st-white);
      margin-bottom: 18px;
    }
    .footer-links-col {
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .footer-links-col li {
      margin-bottom: 10px;
    }
    .footer-links-col a:hover {
      color: var(--st-accent);
    }
    .footer-bottom-bar {
      border-top: 1px solid rgba(255,255,255,0.08);
      margin-top: 45px;
      padding-top: 20px;
      font-size: 0.82rem;
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      gap: 12px;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-h1-main { font-size: 2.2rem; }
      .nav-links-list { gap: 14px; }
    }
    @media (max-width: 768px) {
      .mobile-nav-toggle { display: block; }
      .nav-links-list {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--st-primary);
        flex-direction: column;
        padding: 16px 20px;
        gap: 12px;
        border-bottom: 2px solid var(--st-accent);
      }
      .nav-links-list.is-open { display: flex; }
      .header-top-bar { display: none; }
      .sec-wrap { padding: 55px 0; }
      .sec-title { font-size: 1.75rem; }
      .hero-h1-main { font-size: 1.85rem; }
      .btn-header-cta { display: none; }
    }