/* roulang page: index */
:root {
      --bg-canvas: #0B0D10;
      --bg-surface: #14181D;
      --bg-surface-elevated: #1C222A;
      --bg-deep: #050608;
      --accent: #00FF88;
      --accent-hover: #00cc6d;
      --secondary-accent: #00B8FF;
      --text-main: #F5F7FA;
      --text-muted: #9BA3AF;
      --border-subtle: rgba(255, 255, 255, 0.08);
      --border-accent: rgba(0, 255, 136, 0.35);
      --radius-sm: 4px;
      --radius-base: 8px;
      --radius-md: 12px;
      --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    }

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

    body {
      background-color: var(--bg-canvas);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
      line-height: 1.7;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

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

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

    /* 顶部元信息栏与主导航 */
    .top-meta-bar {
      background-color: #060709;
      border-bottom: 1px solid var(--border-subtle);
      font-size: 0.8125rem;
      color: var(--text-muted);
      padding: 6px 0;
    }
    .status-pulse {
      display: inline-block;
      width: 7px;
      height: 7px;
      background-color: var(--accent);
      border-radius: 50%;
      margin-right: 6px;
      box-shadow: 0 0 8px var(--accent);
      animation: pulseAnim 2s infinite;
    }
    @keyframes pulseAnim {
      0% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.4; transform: scale(0.85); }
      100% { opacity: 1; transform: scale(1); }
    }

    .main-navbar {
      background: rgba(11, 13, 16, 0.88);
      backdrop-filter: blur(14px);
      border-bottom: 1px solid var(--border-subtle);
      transition: var(--transition);
      z-index: 1030;
    }
    .navbar-brand-text {
      font-size: 1.35rem;
      font-weight: 800;
      letter-spacing: -0.02em;
      color: var(--text-main);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .navbar-brand-text span {
      color: var(--accent);
    }
    .nav-link {
      color: var(--text-muted) !important;
      font-weight: 500;
      font-size: 0.9375rem;
      padding: 0.5rem 1rem !important;
      transition: var(--transition);
    }
    .nav-link:hover, .nav-link.active {
      color: var(--accent) !important;
    }

    /* 按钮规范 */
    .btn-gamer-primary {
      background-color: var(--accent);
      color: #050608;
      font-weight: 700;
      font-size: 0.9375rem;
      padding: 0.75rem 1.75rem;
      border-radius: var(--radius-sm);
      border: 1px solid var(--accent);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      transition: var(--transition);
    }
    .btn-gamer-primary:hover {
      background-color: var(--accent-hover);
      color: #000;
      box-shadow: 0 0 20px rgba(0, 255, 136, 0.35);
      transform: translateY(-2px);
    }
    .btn-gamer-secondary {
      background-color: rgba(255, 255, 255, 0.04);
      color: var(--text-main);
      font-weight: 600;
      font-size: 0.9375rem;
      padding: 0.75rem 1.75rem;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-subtle);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      transition: var(--transition);
    }
    .btn-gamer-secondary:hover {
      background-color: rgba(255, 255, 255, 0.08);
      border-color: var(--accent);
      color: var(--accent);
      transform: translateY(-2px);
    }

    /* 徽章与标签 */
    .tech-tag {
      font-family: monospace;
      font-size: 0.75rem;
      padding: 0.25rem 0.6rem;
      background: rgba(0, 255, 136, 0.08);
      color: var(--accent);
      border: 1px solid rgba(0, 255, 136, 0.25);
      border-radius: var(--radius-sm);
      display: inline-block;
      text-transform: uppercase;
      letter-spacing: 0.05em;
    }
    .section-eyebrow {
      color: var(--accent);
      font-size: 0.8125rem;
      font-weight: 700;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      margin-bottom: 0.75rem;
      display: block;
    }

    /* Section 基础规范 */
    .app-section {
      padding: 5.5rem 0;
      position: relative;
    }
    .section-alt {
      background-color: var(--bg-surface);
      border-top: 1px solid var(--border-subtle);
      border-bottom: 1px solid var(--border-subtle);
    }
    .section-pure-deep {
      background-color: var(--bg-deep);
      border-top: 1px solid var(--border-subtle);
      border-bottom: 1px solid var(--border-subtle);
    }
    .section-title {
      font-size: 2.25rem;
      font-weight: 800;
      letter-spacing: -0.02em;
      color: var(--text-main);
      margin-bottom: 1rem;
    }
    .section-subtitle {
      color: var(--text-muted);
      font-size: 1.0625rem;
      max-width: 720px;
      margin-bottom: 3rem;
    }

    /* 卡片基础形态 */
    .gamer-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-base);
      padding: 2rem;
      height: 100%;
      transition: var(--transition);
      position: relative;
      display: flex;
      flex-direction: column;
    }
    .gamer-card:hover {
      border-color: var(--border-accent);
      transform: translateY(-4px);
      box-shadow: 0 12px 30px rgba(0, 255, 136, 0.08);
    }

    /* 1. Hero 轮播与倒计时发布区 */
    .hero-wrapper {
      position: relative;
      background: radial-gradient(circle at 80% 20%, rgba(0, 255, 136, 0.06), transparent 50%),
                  radial-gradient(circle at 20% 80%, rgba(0, 184, 255, 0.04), transparent 50%),
                  var(--bg-canvas);
      padding: 4.5rem 0 3.5rem;
      overflow: hidden;
    }
    .hero-h1 {
      font-size: clamp(2.4rem, 5vw, 3.6rem);
      font-weight: 800;
      line-height: 1.15;
      letter-spacing: -0.03em;
      margin-bottom: 1.5rem;
    }
    .hero-h1 span {
      color: var(--accent);
      text-shadow: 0 0 28px rgba(0, 255, 136, 0.25);
    }
    .hero-desc {
      font-size: 1.0625rem;
      color: var(--text-muted);
      margin-bottom: 2rem;
      max-width: 620px;
    }
    .countdown-box {
      background: rgba(20, 24, 29, 0.85);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-base);
      padding: 1.5rem;
      backdrop-filter: blur(8px);
    }
    .timer-digit {
      font-family: monospace;
      font-size: 2rem;
      font-weight: 700;
      color: var(--accent);
      background: rgba(0, 0, 0, 0.4);
      padding: 0.25rem 0.5rem;
      border-radius: var(--radius-sm);
      border: 1px solid rgba(255, 255, 255, 0.05);
      display: inline-block;
      min-width: 52px;
      text-align: center;
    }
    .carousel-indicators [data-bs-target] {
      width: 24px;
      height: 3px;
      border-radius: 2px;
      background-color: var(--text-muted);
    }
    .carousel-indicators .active {
      background-color: var(--accent);
      width: 36px;
    }

    /* 2. 架构指标条 */
    .metric-chip {
      background: rgba(20, 24, 29, 0.6);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-base);
      padding: 1.25rem;
      display: flex;
      align-items: center;
      gap: 1rem;
    }
    .metric-value-huge {
      font-family: monospace;
      font-size: 2.75rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1;
    }
    .metric-value-huge span {
      color: var(--accent);
    }

    /* 步骤卡片指示线 */
    .step-badge {
      width: 36px;
      height: 36px;
      background: var(--bg-surface-elevated);
      color: var(--accent);
      border: 1px solid var(--accent);
      border-radius: 50%;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-family: monospace;
      font-weight: 700;
      margin-bottom: 1.25rem;
    }

    /* Accordion 重塑 */
    .accordion-item {
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-base) !important;
      margin-bottom: 1rem;
      overflow: hidden;
    }
    .accordion-button {
      background: var(--bg-surface);
      color: var(--text-main);
      font-weight: 600;
      font-size: 1.0625rem;
      padding: 1.25rem 1.5rem;
      box-shadow: none !important;
    }
    .accordion-button:not(.collapsed) {
      background: var(--bg-surface-elevated);
      color: var(--accent);
      border-bottom: 1px solid var(--border-subtle);
    }
    .accordion-button::after {
      filter: invert(1);
    }
    .accordion-body {
      background: var(--bg-surface);
      color: var(--text-muted);
      font-size: 0.9375rem;
      padding: 1.5rem;
      line-height: 1.8;
    }

    /* 浮动转化条 */
    .sticky-bottom-cta {
      position: fixed;
      bottom: 0;
      left: 0;
      right: 0;
      z-index: 1020;
      background: rgba(11, 13, 16, 0.95);
      border-top: 1px solid var(--border-accent);
      backdrop-filter: blur(12px);
      padding: 0.85rem 0;
      box-shadow: 0 -8px 24px rgba(0, 0, 0, 0.5);
      transform: translateY(100%);
      transition: transform 0.3s ease;
    }
    .sticky-bottom-cta.visible {
      transform: translateY(0);
    }

    /* 页脚 */
    .main-footer {
      background: #060709;
      border-top: 1px solid var(--border-subtle);
      padding: 4.5rem 0 2rem;
      font-size: 0.875rem;
      color: var(--text-muted);
      margin-bottom: 60px; /* 留出吸底条空间 */
    }
    .footer-title {
      color: var(--text-main);
      font-size: 0.9375rem;
      font-weight: 700;
      margin-bottom: 1.25rem;
      text-transform: uppercase;
      letter-spacing: 0.05em;
    }
    .footer-list {
      list-style: none;
      padding: 0;
      margin: 0;
    }
    .footer-list li {
      margin-bottom: 0.65rem;
    }

    @media (max-width: 768px) {
      .app-section { padding: 3.5rem 0; }
      .section-title { font-size: 1.75rem; }
      .hero-h1 { font-size: 2.1rem; }
      .timer-digit { font-size: 1.4rem; min-width: 42px; }
      .sticky-bottom-cta { display: none; }
      .main-footer { margin-bottom: 0; }
    }