/* roulang page: index */
:root {
      --bg-dark: #0B0C10;
      --bg-card: #14171F;
      --bg-card-hover: #1A1F2C;
      --bg-light: #F8F9FA;
      --bg-pure-white: #FFFFFF;
      --text-main: #FFFFFF;
      --text-dark-main: #111827;
      --text-muted: #8E9BAE;
      --text-dark-muted: #4B5563;
      --brand-pulse: #00E599;
      --brand-blue: #0070F3;
      --gold-accent: #E5A93C;
      --gold-glow: rgba(229, 169, 60, 0.18);
      --border-dark: rgba(255, 255, 255, 0.08);
      --border-light: rgba(0, 0, 0, 0.08);
      --radius-sm: 4px;
      --radius-md: 8px;
      --radius-lg: 12px;
      --radius-pill: 9999px;
      --container-max: 1280px;
      --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    }

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

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-dark);
      color: var(--text-main);
      -webkit-font-smoothing: antialiased;
    }

    body {
      overflow-x: hidden;
      line-height: 1.6;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }

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

    button, input, select, textarea {
      font-family: inherit;
    }

    .container {
      width: 100%;
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部复合双行导航 */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      background: rgba(11, 12, 16, 0.85);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border-bottom: 1px solid var(--border-dark);
    }

    .top-status-bar {
      border-bottom: 1px solid rgba(255, 255, 255, 0.04);
      font-size: 12px;
      color: var(--text-muted);
      padding: 6px 0;
    }

    .top-status-bar .container {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .status-badge {
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .status-dot {
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--brand-pulse);
      box-shadow: 0 0 8px var(--brand-pulse);
      animation: pulse 2s infinite;
    }

    @keyframes pulse {
      0% { opacity: 0.6; transform: scale(0.9); }
      50% { opacity: 1; transform: scale(1.1); }
      100% { opacity: 0.6; transform: scale(0.9); }
    }

    .main-nav-bar {
      padding: 14px 0;
    }

    .nav-wrap {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .nav-brand {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 19px;
      font-weight: 700;
      letter-spacing: -0.5px;
      color: #FFF;
    }

    .nav-brand-tag {
      background: linear-gradient(135deg, #00E599, #0070F3);
      color: #000;
      font-size: 10px;
      font-weight: 800;
      padding: 2px 6px;
      border-radius: var(--radius-sm);
      text-transform: uppercase;
    }

    .nav-menu {
      display: flex;
      list-style: none;
      gap: 32px;
      align-items: center;
    }

    .nav-link {
      color: #D1D5DB;
      font-size: 14px;
      font-weight: 500;
      position: relative;
      padding: 6px 0;
    }

    .nav-link:hover, .nav-link.active {
      color: var(--brand-pulse);
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 10px 22px;
      font-size: 14px;
      font-weight: 600;
      border-radius: var(--radius-sm);
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      white-space: nowrap;
    }

    .btn-pulse {
      background: var(--brand-pulse);
      color: #0B0C10;
    }

    .btn-pulse:hover {
      background: #00c784;
      transform: translateY(-2px);
      box-shadow: 0 4px 16px rgba(0, 229, 153, 0.3);
    }

    .btn-outline {
      border: 1px solid rgba(255, 255, 255, 0.2);
      color: #FFF;
      background: transparent;
    }

    .btn-outline:hover {
      border-color: #FFF;
      background: rgba(255, 255, 255, 0.05);
      transform: translateY(-2px);
    }

    .btn-gold {
      background: linear-gradient(135deg, #FFDF9E 0%, #D49833 100%);
      color: #1A1305;
      font-weight: 700;
    }

    .btn-gold:hover {
      box-shadow: 0 4px 20px var(--gold-glow);
      transform: translateY(-2px);
    }

    /* 板块基础设计 */
    .section-sp {
      padding: 96px 0;
      position: relative;
    }

    .section-sp-dark {
      background-color: var(--bg-dark);
    }

    .section-sp-card {
      background-color: #0E1017;
      border-top: 1px solid var(--border-dark);
      border-bottom: 1px solid var(--border-dark);
    }

    .section-sp-light {
      background-color: var(--bg-light);
      color: var(--text-dark-main);
    }

    .section-title-wrap {
      margin-bottom: 56px;
    }

    .section-badge {
      display: inline-block;
      padding: 4px 12px;
      background: rgba(0, 229, 153, 0.1);
      border: 1px solid rgba(0, 229, 153, 0.2);
      color: var(--brand-pulse);
      font-size: 12px;
      font-weight: 600;
      border-radius: var(--radius-pill);
      margin-bottom: 16px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .section-badge-gold {
      background: rgba(229, 169, 60, 0.12);
      border-color: rgba(229, 169, 60, 0.3);
      color: var(--gold-accent);
    }

    .section-badge-light {
      background: rgba(0, 112, 243, 0.08);
      border: 1px solid rgba(0, 112, 243, 0.2);
      color: var(--brand-blue);
    }

    .section-h2 {
      font-size: clamp(28px, 3.5vw, 40px);
      font-weight: 800;
      line-height: 1.25;
      letter-spacing: -0.5px;
      margin-bottom: 16px;
    }

    .section-p {
      color: var(--text-muted);
      font-size: 15px;
      max-width: 680px;
      line-height: 1.7;
    }

    .section-p-dark {
      color: var(--text-dark-muted);
    }

    /* 板块 1: Hero 会员俱乐部黑金感首屏 */
    .hero-section {
      padding-top: 170px;
      padding-bottom: 100px;
      background: radial-gradient(circle at 80% 20%, rgba(229, 169, 60, 0.08) 0%, transparent 50%),
                  radial-gradient(circle at 10% 60%, rgba(0, 229, 153, 0.06) 0%, transparent 40%),
                  linear-gradient(180deg, #11141C 0%, #0B0C10 100%);
      border-bottom: 1px solid var(--border-dark);
      position: relative;
      overflow: hidden;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 48px;
      align-items: center;
    }

    .hero-vip-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 14px;
      background: linear-gradient(90deg, rgba(229, 169, 60, 0.15), rgba(229, 169, 60, 0.03));
      border: 1px solid rgba(229, 169, 60, 0.3);
      border-radius: var(--radius-pill);
      color: #FFDF9E;
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 24px;
    }

    .hero-h1 {
      font-size: clamp(34px, 4.5vw, 56px);
      font-weight: 800;
      line-height: 1.15;
      letter-spacing: -1px;
      margin-bottom: 24px;
      background: linear-gradient(180deg, #FFFFFF 0%, #D1D5DB 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      font-size: 16px;
      color: #9CA3AF;
      line-height: 1.8;
      margin-bottom: 36px;
    }

    .hero-cta-group {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 40px;
    }

    .hero-specs-row {
      display: flex;
      gap: 32px;
      border-top: 1px solid var(--border-dark);
      padding-top: 24px;
    }

    .spec-item {
      display: flex;
      flex-direction: column;
    }

    .spec-val {
      font-size: 22px;
      font-weight: 700;
      color: #FFF;
      font-family: monospace;
    }

    .spec-lbl {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* VIP 黑金特权卡片 */
    .vip-dashboard-card {
      background: linear-gradient(145deg, #181C26 0%, #0F1219 100%);
      border: 1px solid rgba(229, 169, 60, 0.3);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5), 0 0 30px var(--gold-glow);
      position: relative;
    }

    .card-level-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 24px;
      padding-bottom: 16px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .vip-badge-icon {
      width: 44px;
      height: 44px;
      background: linear-gradient(135deg, #FFDF9E, #D49833);
      border-radius: var(--radius-md);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #111;
      font-weight: 900;
      font-size: 18px;
    }

    .vip-tier-info h4 {
      font-size: 18px;
      color: #FFF;
      margin-bottom: 2px;
    }

    .vip-tier-info p {
      font-size: 12px;
      color: var(--gold-accent);
    }

    .live-stream-panel {
      background: #090B0E;
      border-radius: var(--radius-md);
      overflow: hidden;
      margin-bottom: 24px;
      border: 1px solid rgba(255, 255, 255, 0.05);
    }

    .stream-telemetry {
      padding: 14px;
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 12px;
      background: rgba(255, 255, 255, 0.02);
      border-top: 1px solid rgba(255, 255, 255, 0.05);
    }

    .telemetry-item {
      font-size: 11px;
    }

    .telemetry-item span {
      display: block;
      color: var(--text-muted);
      margin-bottom: 2px;
    }

    .telemetry-item strong {
      color: var(--brand-pulse);
      font-family: monospace;
      font-size: 13px;
    }

    /* 板块 2: 资料目录 / 资源库 */
    .catalog-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .catalog-card {
      background: var(--bg-card);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 24px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .catalog-card:hover {
      border-color: rgba(0, 229, 153, 0.3);
      transform: translateY(-3px);
    }

    .catalog-num {
      font-family: monospace;
      font-size: 12px;
      color: var(--brand-pulse);
      margin-bottom: 12px;
    }

    .catalog-card h3 {
      font-size: 16px;
      margin-bottom: 10px;
      color: #FFF;
    }

    .catalog-card p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }

    .catalog-footer {
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 12px;
      color: var(--text-muted);
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 12px;
    }

    /* 板块 3: 价值点 (三连卡片) */
    .value-pillars {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .pillar-card {
      background: linear-gradient(180deg, #171A24 0%, #10131A 100%);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 36px 30px;
      position: relative;
      transition: var(--transition);
    }

    .pillar-card:hover {
      border-color: rgba(0, 112, 243, 0.4);
      transform: translateY(-4px);
    }

    .pillar-icon {
      width: 52px;
      height: 52px;
      background: rgba(0, 229, 153, 0.08);
      border: 1px solid rgba(0, 229, 153, 0.2);
      border-radius: var(--radius-md);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--brand-pulse);
      margin-bottom: 24px;
      font-size: 20px;
      font-weight: 700;
    }

    .pillar-card h3 {
      font-size: 20px;
      margin-bottom: 14px;
      color: #FFF;
    }

    .pillar-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
    }

    .pillar-tag {
      font-size: 12px;
      color: var(--brand-blue);
      font-weight: 600;
    }

    /* 板块 4: 关键图表与指标 */
    .metrics-dashboard-box {
      background: var(--bg-card);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-lg);
      padding: 40px;
    }

    .chart-metrics-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      margin-bottom: 36px;
    }

    .metric-data-card {
      background: rgba(255, 255, 255, 0.02);
      border: 1px solid rgba(255, 255, 255, 0.04);
      border-radius: var(--radius-sm);
      padding: 24px 20px;
      text-align: left;
    }

    .metric-huge-num {
      font-size: clamp(32px, 3.5vw, 44px);
      font-weight: 800;
      color: var(--brand-pulse);
      font-family: monospace;
      line-height: 1;
      margin-bottom: 8px;
    }

    .metric-title {
      font-size: 14px;
      color: #FFF;
      font-weight: 600;
      margin-bottom: 4px;
    }

    .metric-sub {
      font-size: 12px;
      color: var(--text-muted);
    }

    .chart-stage-area {
      background: #090B0F;
      border: 1px solid rgba(255, 255, 255, 0.06);
      border-radius: var(--radius-md);
      padding: 24px;
      display: grid;
      grid-template-columns: 1.3fr 0.7fr;
      gap: 32px;
      align-items: center;
    }

    .chart-canvas-sim {
      height: 200px;
      position: relative;
      display: flex;
      align-items: flex-end;
      gap: 16px;
      padding-bottom: 24px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .bar-col {
      flex: 1;
      background: linear-gradient(180deg, var(--brand-pulse) 0%, rgba(0, 229, 153, 0.1) 100%);
      border-radius: var(--radius-sm) var(--radius-sm) 0 0;
      position: relative;
    }

    .bar-col span {
      position: absolute;
      top: -24px;
      left: 50%;
      transform: translateX(-50%);
      font-size: 11px;
      color: #9CA3AF;
      font-family: monospace;
    }

    .chart-info-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .info-line {
      display: flex;
      justify-content: space-between;
      font-size: 13px;
      border-bottom: 1px dashed rgba(255, 255, 255, 0.06);
      padding-bottom: 8px;
    }

    .info-line span {
      color: var(--text-muted);
    }

    .info-line strong {
      color: #FFF;
      font-family: monospace;
    }

    /* 板块 5: 架构与技术深度介绍 */
    .arch-overview-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }

    .tech-badges-list {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 24px;
    }

    .tech-pill {
      font-size: 12px;
      padding: 6px 14px;
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-pill);
      color: #E5E7EB;
    }

    /* 板块 6: 6 大工程优势卡片网格 */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .feat-item {
      background: var(--bg-card);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 28px;
      transition: var(--transition);
    }

    .feat-item:hover {
      border-color: rgba(255, 255, 255, 0.2);
      transform: translateY(-2px);
    }

    .feat-item h3 {
      font-size: 17px;
      margin-bottom: 12px;
      color: #FFF;
    }

    .feat-item p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 板块 7: 3 级解决方案矩阵 */
    .solutions-tier-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .tier-box {
      background: #11141E;
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 36px 28px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      position: relative;
    }

    .tier-box.featured {
      border-color: var(--gold-accent);
      box-shadow: 0 10px 30px var(--gold-glow);
    }

    .tier-ribbon {
      position: absolute;
      top: -12px;
      right: 20px;
      background: var(--gold-accent);
      color: #111;
      font-size: 11px;
      font-weight: 800;
      padding: 2px 10px;
      border-radius: var(--radius-sm);
    }

    .tier-box h3 {
      font-size: 20px;
      color: #FFF;
      margin-bottom: 10px;
    }

    .tier-box .tier-desc {
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 24px;
      line-height: 1.6;
    }

    .tier-features {
      list-style: none;
      margin-bottom: 32px;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .tier-features li {
      font-size: 13px;
      color: #D1D5DB;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .tier-features li::before {
      content: "✓";
      color: var(--brand-pulse);
      font-weight: 800;
    }

    /* 板块 8: 沉浸式调度架构展示 (深黑重点区) */
    .dark-showcase-box {
      background: #08090C;
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--radius-lg);
      padding: 48px;
      overflow: hidden;
    }

    .topo-flow-grid {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 16px;
      align-items: center;
      text-align: center;
      margin-top: 36px;
    }

    .topo-node {
      background: #12151E;
      border: 1px solid rgba(2255, 255, 255, 0.08);
      border-radius: var(--radius-md);
      padding: 16px;
      font-size: 12px;
      color: var(--text-muted);
    }

    .testimonial-card {
      background: var(--bg-card);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 32px;
    }

    .footer {
      background: #050608;
      border-top: 1px solid var(--border-dark);
      padding: 80px 0 40px;
    }