/* roulang page: index */
:root {
      --primary-red: #E63946;
      --primary-red-dark: #C1121F;
      --secondary-wood: #C19A6B;
      --deep-black: #1A1A1A;
      --light-surface: #F8F9FA;
      --buzzer-yellow: #F4A261;
      --text-white: #FFFFFF;
      --text-muted: #ADB5BD;
      --border-light: #DEE2E6;
      --card-shadow: 0 8px 20px rgba(0,0,0,0.08);
      --capsule-shadow: 0 4px 15px rgba(0,0,0,0.1);
      --border-radius-sm: 6px;
      --border-radius-md: 8px;
      --border-radius-pill: 50px;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      background-color: var(--light-surface);
      color: #212529;
      margin: 0;
      line-height: 1.7;
      overflow-x: hidden;
    }

    .data-font {
      font-family: 'DIN Alternate', 'Roboto Mono', 'Menlo', monospace;
      font-weight: 700;
    }

    h1, h2, h3, h4 {
      font-weight: 700;
      letter-spacing: -0.3px;
    }

    h1 {
      font-weight: 800;
      letter-spacing: -0.5px;
    }

    .section-padding {
      padding: 5rem 0;
    }

    /* 悬浮胶囊导航 */
    .navbar-custom {
      position: fixed;
      top: 20px;
      left: 50%;
      transform: translateX(-50%);
      width: auto;
      max-width: 90%;
      background: rgba(26, 26, 26, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-radius: var(--border-radius-pill);
      padding: 0.6rem 2rem;
      z-index: 1000;
      box-shadow: var(--capsule-shadow);
      display: flex;
      align-items: center;
      justify-content: space-between;
      border: 1px solid rgba(255,255,255,0.15);
    }

    .navbar-brand-custom {
      color: var(--text-white) !important;
      font-weight: 700;
      font-size: 1.4rem;
      display: flex;
      align-items: center;
      gap: 0.5rem;
      text-decoration: none;
      letter-spacing: 1px;
    }

    .navbar-brand-custom i {
      color: var(--primary-red);
      font-size: 1.5rem;
    }

    .nav-link-custom {
      color: rgba(255,255,255,0.85) !important;
      margin: 0 0.8rem;
      font-weight: 500;
      transition: color 0.2s;
      text-decoration: none;
      font-size: 0.95rem;
    }

    .nav-link-custom:hover, .nav-link-custom.active {
      color: var(--primary-red) !important;
    }

    .btn-primary-red {
      background: var(--primary-red);
      border: none;
      color: white;
      border-radius: var(--border-radius-sm);
      padding: 0.7rem 1.8rem;
      font-weight: 600;
      transition: background 0.25s, transform 0.15s;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .btn-primary-red:hover {
      background: var(--primary-red-dark);
      color: white;
      transform: translateY(-1px);
    }

    .btn-outline-wood {
      background: transparent;
      border: 1px solid var(--secondary-wood);
      color: var(--secondary-wood);
      border-radius: var(--border-radius-sm);
      padding: 0.6rem 1.8rem;
      font-weight: 600;
      transition: all 0.25s;
    }

    .btn-outline-wood:hover {
      background: var(--secondary-wood);
      color: white;
      border-color: var(--secondary-wood);
    }

    /* Hero 分数板 */
    .scoreboard-card {
      background: #0B0B0B;
      border-radius: 16px;
      padding: 1.8rem;
      box-shadow: 0 20px 35px rgba(0,0,0,0.5);
      border: 1px solid #2C2C2C;
    }

    .live-badge {
      background: var(--buzzer-yellow);
      color: #000;
      font-weight: 700;
      padding: 0.2rem 0.8rem;
      border-radius: 20px;
      font-size: 0.7rem;
      letter-spacing: 0.5px;
      display: inline-flex;
      align-items: center;
      gap: 0.3rem;
      animation: pulse-live 1.8s infinite;
    }

    @keyframes pulse-live {
      0% { opacity: 1; }
      50% { opacity: 0.7; }
      100% { opacity: 1; }
    }

    .score-number {
      font-size: 2.8rem;
      font-family: 'DIN Alternate', 'Roboto Mono', monospace;
      font-weight: 700;
      color: white;
    }

    /* 卡片统一样式 */
    .feature-card {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: var(--border-radius-md);
      padding: 2rem 1.5rem;
      transition: all 0.25s ease;
      height: 100%;
    }

    .feature-card:hover {
      border-color: var(--secondary-wood);
      box-shadow: var(--card-shadow);
      transform: translateY(-4px);
    }

    .icon-wood-circle {
      color: var(--secondary-wood);
      font-size: 2.2rem;
      margin-bottom: 1.2rem;
    }

    .comparison-left {
      background: #f1f3f5;
      border-radius: var(--border-radius-md);
      padding: 1.8rem;
      color: #6c757d;
    }

    .comparison-right {
      background: var(--deep-black);
      border-radius: var(--border-radius-md);
      padding: 1.8rem;
      color: white;
      border: 1px solid var(--primary-red);
    }

    .accordion-button-custom {
      background: white;
      border: 1px solid var(--border-light);
      border-radius: var(--border-radius-sm) !important;
      margin-bottom: 1rem;
      font-weight: 600;
      box-shadow: none !important;
    }

    .accordion-button-custom:not(.collapsed) {
      background: #FFF5F5;
      color: var(--primary-red);
      border-color: var(--primary-red);
    }

    .cta-dark-section {
      background: var(--deep-black);
      background-image: radial-gradient(circle at 20% 30%, #2a2a2a 0%, #0d0d0d 90%);
    }

    .footer-link {
      color: var(--secondary-wood);
      text-decoration: none;
    }

    .footer-link:hover {
      color: var(--primary-red);
    }

    @media (max-width: 768px) {
      .navbar-custom {
        top: auto;
        bottom: 15px;
        width: 95%;
        padding: 0.5rem 1.5rem;
        justify-content: center;
      }
      .nav-link-custom {
        margin: 0 0.5rem;
        font-size: 0.8rem;
      }
      .navbar-brand-custom span {
        display: none;
      }
      h1 {
        font-size: 2.2rem;
      }
      .score-number {
        font-size: 2rem;
      }
    }