/* roulang page: index */
:root {
      --primary: #00FF88;
      --primary-hover: #00cc6d;
      --accent: #FF5E00;
      --bg-dark: #0D1117;
      --bg-card: #161B22;
      --bg-card-alt: #1c232d;
      --bg-light: #F4F6F9;
      --text-main: #FFFFFF;
      --text-muted: #8B949E;
      --text-dark: #1F2937;
      --text-dark-muted: #4B5563;
      --border-dark: #30363D;
      --border-light: #E1E4E8;
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --shadow-sm: 0 4px 12px rgba(0,0,0,0.15);
      --shadow-lg: 0 12px 36px rgba(0,0,0,0.28);
      --font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
    }

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

    html {
      scroll-behavior: smooth;
      font-family: var(--font-family);
      color: var(--text-dark);
      background-color: var(--bg-light);
    }

    body {
      line-height: 1.65;
      overflow-x: hidden;
    }

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

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

    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 20px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 13px 26px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 15px;
      cursor: pointer;
      transition: all 0.25s ease;
      border: 1px solid transparent;
      line-height: 1;
    }
    .btn-primary {
      background-color: var(--primary);
      color: #06110B;
    }
    .btn-primary:hover {
      background-color: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(0, 255, 136, 0.35);
    }
    .btn-accent {
      background-color: var(--accent);
      color: #fff;
    }
    .btn-accent:hover {
      background-color: #e05200;
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(255, 94, 0, 0.35);
    }
    .btn-outline {
      border-color: var(--border-dark);
      color: var(--text-main);
      background: rgba(255, 255, 255, 0.05);
    }
    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
      transform: translateY(-2px);
    }

    .badge {
      display: inline-block;
      padding: 4px 12px;
      font-size: 12px;
      font-weight: 700;
      border-radius: 999px;
      letter-spacing: 0.5px;
      text-transform: uppercase;
    }
    .badge-primary {
      background: rgba(0, 255, 136, 0.15);
      color: var(--primary);
      border: 1px solid rgba(0, 255, 136, 0.3);
    }
    .badge-accent {
      background: rgba(255, 94, 0, 0.15);
      color: var(--accent);
      border: 1px solid rgba(255, 94, 0, 0.3);
    }

    /* 顶部通知条 */
    .top-bar {
      background-color: #06090e;
      color: var(--text-muted);
      font-size: 13px;
      border-bottom: 1px solid var(--border-dark);
      padding: 8px 0;
    }
    .top-bar .container {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .top-ticker {
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .pulse-dot {
      width: 8px;
      height: 8px;
      background: var(--primary);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--primary);
    }

    /* 主导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(13, 17, 23, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-dark);
    }
    .nav-wrapper {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 20px;
      font-weight: 800;
      color: var(--text-main);
    }
    .brand-logo svg {
      width: 32px;
      height: 32px;
      fill: var(--primary);
    }
    .nav-links {
      display: flex;
      list-style: none;
      gap: 24px;
      align-items: center;
    }
    .nav-links a {
      color: #C9D1D9;
      font-size: 15px;
      font-weight: 500;
    }
    .nav-links a:hover {
      color: var(--primary);
    }
    .nav-cta {
      display: flex;
      align-items: center;
      gap: 14px;
    }
    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      color: var(--text-main);
      font-size: 24px;
      cursor: pointer;
    }

    /* 板块通用头部 */
    .section-head {
      text-align: center;
      max-width: 780px;
      margin: 0 auto 46px;
    }
    .section-head h2 {
      font-size: 32px;
      font-weight: 800;
      margin-bottom: 14px;
      letter-spacing: -0.5px;
    }
    .section-head p {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.75;
    }

    /* 板块通用背景与留白 */
    .sec-dark {
      background-color: var(--bg-dark);
      color: var(--text-main);
      padding: 85px 0;
      position: relative;
    }
    .sec-light {
      background-color: #FFFFFF;
      color: var(--text-dark);
      padding: 85px 0;
    }
    .sec-gray {
      background-color: var(--bg-light);
      color: var(--text-dark);
      padding: 85px 0;
    }

    /* 板块一：首屏 Hero（卡片堆叠） */
    .hero-section {
      background: radial-gradient(circle at 50% 20%, rgba(0, 255, 136, 0.08), transparent 60%), #0D1117;
      color: var(--text-main);
      padding: 70px 0 90px;
      overflow: hidden;
    }
    .hero-intro {
      text-align: center;
      max-width: 860px;
      margin: 0 auto 50px;
    }
    .hero-intro h1 {
      font-size: 42px;
      font-weight: 900;
      line-height: 1.25;
      margin-bottom: 20px;
      background: linear-gradient(180deg, #FFFFFF 0%, #B4C4D1 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-intro p {
      font-size: 16px;
      color: #9CA3AF;
      line-height: 1.8;
      margin-bottom: 30px;
    }
    .hero-actions {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
    }

    /* 卡片堆叠架构：主卡+双侧卡 */
    .hero-deck {
      display: grid;
      grid-template-columns: 280px 1fr 280px;
      gap: 20px;
      align-items: center;
      position: relative;
    }
    .deck-card {
      background: var(--bg-card);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-lg);
      position: relative;
    }
    .deck-card.center-stage {
      background: linear-gradient(145deg, rgba(22, 27, 34, 0.95), rgba(13, 17, 23, 0.98));
      border: 1px solid rgba(0, 255, 136, 0.35);
      box-shadow: 0 10px 40px rgba(0, 255, 136, 0.12);
      transform: scale(1.04);
      z-index: 2;
    }
    .deck-img-wrap {
      border-radius: var(--radius-sm);
      overflow: hidden;
      margin-bottom: 16px;
      border: 1px solid rgba(255,255,255,0.08);
      position: relative;
    }
    .deck-img-wrap img {
      width: 100%;
      height: 220px;
      object-fit: cover;
    }
    .hud-meta-row {
      display: flex;
      justify-content: space-between;
      border-top: 1px solid var(--border-dark);
      padding-top: 12px;
      margin-top: 12px;
      font-size: 13px;
      color: var(--text-muted);
    }
    .hud-val {
      color: var(--primary);
      font-weight: 700;
    }

    /* 指标栏 */
    .metrics-strip {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 45px;
      background: rgba(22, 27, 34, 0.6);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 20px;
    }
    .metric-cell {
      text-align: center;
      border-right: 1px solid var(--border-dark);
    }
    .metric-cell:last-child {
      border-right: none;
    }
    .metric-number {
      font-size: 28px;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.2;
    }
    .metric-label {
      font-size: 13px;
      color: var(--text-muted);
      margin-top: 4px;
    }

    /* 板块二：矩阵能力 */
    .service-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .service-card {
      background: var(--bg-card);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 30px;
      transition: all 0.3s ease;
    }
    .service-card:hover {
      border-color: var(--primary);
      transform: translateY(-4px);
    }
    .service-card h3 {
      font-size: 19px;
      color: #fff;
      margin: 16px 0 10px;
    }
    .service-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }
    .tech-specs-chip {
      margin-top: 16px;
      padding: 8px 12px;
      background: rgba(0, 255, 136, 0.05);
      border-left: 3px solid var(--primary);
      font-size: 12px;
      color: #A7F3D0;
    }

    /* 板块三：核心优势（严格 2x3 网格） */
    .adv-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .adv-card {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
    }
    .adv-card:hover {
      border-color: #00874A;
      box-shadow: 0 10px 24px rgba(0,0,0,0.08);
      transform: translateY(-3px);
    }
    .adv-card h3 {
      font-size: 18px;
      margin: 12px 0 8px;
      color: #111827;
    }
    .adv-card p {
      font-size: 14px;
      color: #4B5563;
      line-height: 1.65;
    }

    /* 板块四：终端产品形态（严格 3 大卡） */
    .terminal-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .terminal-card {
      background: var(--bg-card);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }
    .terminal-body {
      padding: 26px;
      flex: 1;
    }
    .terminal-features {
      list-style: none;
      margin-top: 16px;
      padding-top: 16px;
      border-top: 1px solid var(--border-dark);
    }
    .terminal-features li {
      font-size: 13px;
      color: #9CA3AF;
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .terminal-features li::before {
      content: "•";
      color: var(--primary);
      font-size: 18px;
    }

    /* 板块五：沉浸概念区（强视觉全景） */
    .dark-showcase-box {
      background: linear-gradient(180deg, #06090e 0%, #161B22 100%);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-lg);
      padding: 40px;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .showcase-text h3 {
      font-size: 26px;
      margin-bottom: 16px;
      color: #fff;
    }
    .showcase-text p {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 24px;
    }

    /* 板块六：对比矩阵 */
    .compare-container {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      overflow: hidden;
    }
    .compare-row {
      display: grid;
      grid-template-columns: 220px 1fr 1fr;
      padding: 20px 24px;
      border-bottom: 1px solid var(--border-light);
      align-items: center;
    }
    .compare-row.head {
      background: #F9FAFB;
      font-weight: 700;
      color: #111827;
    }
    .compare-row:last-child {
      border-bottom: none;
    }
    .compare-item-trad {
      color: #6B7280;
      font-size: 14px;
    }
    .compare-item-vr {
      color: #065F46;
      font-weight: 600;
      font-size: 14px;
      background: rgba(0, 255, 136, 0.08);
      padding: 8px 14px;
      border-radius: 6px;
      border-left: 3px solid #10B981;
    }

    /* 板块七：合作生态与俱乐部故事 */
    .story-list {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
    }
    .story-card {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      box-shadow: var(--shadow-sm);
    }
    .story-card img {
      width: 40%;
      object-fit: cover;
    }
    .story-content {
      padding: 24px;
      width: 60%;
    }
    .story-content h3 {
      font-size: 18px;
      margin-bottom: 8px;
      color: #111827;
    }
    .story-content p {
      font-size: 14px;
      color: #4B5563;
      line-height: 1.6;
    }

    /* 板块八：里程碑通栏 */
    .stats-banner {
      background: #111827;
      border-top: 1px solid var(--border-dark);
      border-bottom: 1px solid var(--border-dark);
      padding: 50px 0;
      color: #FFFFFF;
    }
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      text-align: center;
    }
    .stat-lead {
      font-size: 38px;
      font-weight: 900;
      color: var(--primary);
    }
    .stat-desc {
      font-size: 14px;
      color: var(--text-muted);
      margin-top: 6px;
    }

    /* 板块九：行业与球迷评价 */
    .review-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .review-card {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
    }
    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 12px;
    }
    .user-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #1F2937;
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
    }
    .review-text {
      font-size: 14px;
      color: #374151;
      line-height: 1.7;
    }

    /* 板块十：技术资讯 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .news-card {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }
    .news-body {
      padding: 22px;
      flex: 1;
    }
    .news-date {
      font-size: 12px;
      color: #9CA3AF;
      margin-bottom: 8px;
    }
    .news-card h3 {
      font-size: 17px;
      margin-bottom: 10px;
      color: #111827;
      line-height: 1.4;
    }
    .news-card p {
      font-size: 14px;
      color: #4B5563;
      line-height: 1.6;
    }

    /* 板块十一：合规与保障 */
    .cert-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .cert-card {
      background: var(--bg-card);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 24px;
      text-align: center;
      color: #fff;
    }
    .cert-card h4 {
      font-size: 16px;
      margin: 12px 0 6px;
      color: var(--primary);
    }
    .cert-card p {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* 板块十二：FAQ + 预约表单 */
    .faq-form-split {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 36px;
      align-items: flex-start;
    }
    .faq-accordion {
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-sm);
      overflow: hidden;
    }
    .faq-trigger {
      width: 100%;
      text-align: left;
      padding: 18px 20px;
      background: none;
      border: none;
      font-size: 16px;
      font-weight: 700;
      color: #111827;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .faq-content {
      padding: 0 20px 18px;
      font-size: 14px;
      color: #4B5563;
      line-height: 1.7;
    }
    .booking-form-box {
      background: var(--bg-card);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 32px;
      color: #FFFFFF;
      box-shadow: var(--shadow-lg);
    }
    .booking-form-box h3 {
      font-size: 20px;
      margin-bottom: 8px;
      color: var(--primary);
    }
    .form-group {
      margin-bottom: 16px;
    }
    .form-group label {
      display: block;
      font-size: 13px;
      color: #9CA3AF;
      margin-bottom: 6px;
    }
    .form-control {
      width: 100%;
      padding: 12px 14px;
      background: #0D1117;
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-sm);
      color: #FFFFFF;
      font-size: 14px;
      font-family: inherit;
    }
    .form-control:focus {
      outline: none;
      border-color: var(--primary);
    }

    /* 页脚 */
    .site-footer {
      background: #080B10;
      color: #9CA3AF;
      border-top: 1px solid var(--border-dark);
      padding: 60px 0 30px;
      font-size: 14px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 36px;
      margin-bottom: 40px;
    }
    .footer-brand h4 {
      color: #fff;
      font-size: 18px;
      margin-bottom: 14px;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a:hover {
      color: var(--primary);
    }
    .footer-bottom {
      border-top: 1px solid #1F2937;
      padding-top: 24px;
      text-align: center;
      font-size: 13px;
      color: #6B7280;
    }

    /* 响应式调整 */
    @media (max-width: 1024px) {
      .hero-deck {
        grid-template-columns: 1fr;
      }
      .deck-card.center-stage {
        transform: none;
      }
      .service-grid, .adv-grid, .terminal-grid, .review-grid, .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .cert-grid, .stats-grid, .metrics-strip {
        grid-template-columns: repeat(2, 1fr);
      }
      .metric-cell {
        border-bottom: 1px solid var(--border-dark);
        padding-bottom: 12px;
      }
      .faq-form-split {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .dark-showcase-box {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-links, .nav-cta .btn {
        display: none;
      }
      .mobile-toggle {
        display: block;
      }
      .hero-intro h1 {
        font-size: 28px;
      }
      .service-grid, .adv-grid, .terminal-grid, .review-grid, .news-grid, .story-list {
        grid-template-columns: 1fr;
      }
      .story-card {
        flex-direction: column;
      }
      .story-card img, .story-content {
        width: 100%;
      }
      .compare-row {
        grid-template-columns: 1fr;
        gap: 8px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .top-ticker {
        font-size: 11px;
      }
    }