/* roulang page: index */
:root {
      --deep-space: #0B0A1A;
      --card-bg: rgba(255, 255, 255, 0.04);
      --border-light: rgba(255, 255, 255, 0.1);
      --border-hover: rgba(255, 255, 255, 0.2);
      --gold: #F0B823;
      --gold-glow: rgba(240, 184, 35, 0.4);
      --cyan: #2DD4BF;
      --cyan-soft: rgba(45, 212, 191, 0.15);
      --text-primary: #FFFFFF;
      --text-secondary: #B8B8D4;
      --text-muted: #7878A0;
      --radius-xl: 16px;
      --radius-full: 9999px;
      --shadow-card: 0 10px 25px -5px rgba(0, 0, 0, 0.3), 0 8px 10px -6px rgba(0, 0, 0, 0.2);
      --shadow-glow: 0 0 20px rgba(240, 184, 35, 0.3);
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      font-family: 'Inter', 'Noto Sans SC', system-ui, sans-serif;
      background-color: var(--deep-space);
      color: var(--text-secondary);
      line-height: 1.7;
      margin: 0;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }
    
    /* 星光粒子纹理背景 */
    .star-particle-bg {
      position: relative;
      background: radial-gradient(circle at 20% 30%, rgba(45, 212, 191, 0.08) 0%, transparent 35%),
                  radial-gradient(circle at 80% 70%, rgba(240, 184, 35, 0.06) 0%, transparent 40%),
                  linear-gradient(135deg, #1A1040 0%, #2D1B69 50%, #0B0A1A 100%);
    }
    
    .star-particle-bg::before {
      content: "";
      position: absolute;
      inset: 0;
      background-image: radial-gradient(1px 1px at 15px 45px, rgba(255,255,255,0.15), transparent),
                        radial-gradient(1px 1px at 75px 120px, rgba(255,255,255,0.1), transparent),
                        radial-gradient(1.5px 1.5px at 230px 30px, rgba(240,184,35,0.2), transparent),
                        radial-gradient(1px 1px at 400px 80px, rgba(255,255,255,0.08), transparent),
                        radial-gradient(1.5px 1.5px at 550px 200px, rgba(45,212,191,0.15), transparent),
                        radial-gradient(1px 1px at 700px 60px, rgba(255,255,255,0.1), transparent);
      background-size: 800px 300px;
      background-repeat: repeat;
      pointer-events: none;
      z-index: 0;
    }
    
    .glass-card {
      background: rgba(255, 255, 255, 0.04);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-xl);
      box-shadow: var(--shadow-card);
      transition: all 0.3s ease;
    }
    
    .glass-card:hover {
      transform: translateY(-4px);
      border-color: var(--border-hover);
      box-shadow: 0 20px 35px -10px rgba(147, 51, 234, 0.25), 0 0 0 1px rgba(240, 184, 35, 0.2);
    }
    
    .btn-gold {
      background-color: var(--gold);
      color: #0B0A1A;
      font-weight: 700;
      padding: 0.875rem 2rem;
      border-radius: var(--radius-full);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: all 0.3s ease;
      box-shadow: 0 4px 15px rgba(240, 184, 35, 0.3);
      border: none;
      cursor: pointer;
      letter-spacing: 0.02em;
    }
    
    .btn-gold:hover {
      box-shadow: 0 8px 25px var(--gold-glow);
      transform: scale(1.05);
      background-color: #f7c84c;
    }
    
    .btn-outline-gold {
      border: 1px solid rgba(240, 184, 35, 0.5);
      color: var(--gold);
      padding: 0.875rem 2rem;
      border-radius: var(--radius-full);
      background: transparent;
      font-weight: 600;
      transition: all 0.3s ease;
      cursor: pointer;
    }
    
    .btn-outline-gold:hover {
      background: rgba(240, 184, 35, 0.1);
      border-color: var(--gold);
      box-shadow: 0 4px 15px rgba(240, 184, 35, 0.2);
    }
    
    .text-gold {
      color: var(--gold);
    }
    
    .text-cyan {
      color: var(--cyan);
    }
    
    .border-cyan {
      border-color: var(--cyan);
    }
    
    .hover-cyan:hover {
      color: var(--cyan);
      transition: color 0.25s;
    }
    
    .nav-link {
      color: var(--text-secondary);
      font-weight: 500;
      transition: color 0.2s;
      position: relative;
      padding: 0.25rem 0;
    }
    
    .nav-link:hover, .nav-link.active {
      color: var(--cyan);
    }
    
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: -2px;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--cyan);
      transition: width 0.3s ease;
    }
    
    .nav-link:hover::after, .nav-link.active::after {
      width: 100%;
    }
    
    .section-title h2 {
      font-size: clamp(1.8rem, 4vw, 2.5rem);
      font-weight: 700;
      color: var(--text-primary);
      margin-bottom: 1rem;
      letter-spacing: -0.01em;
    }
    
    .badge-number {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--gold);
      line-height: 1.2;
    }
    
    /* 手风琴 */
    .faq-item {
      border-bottom: 1px solid var(--border-light);
      transition: all 0.3s;
    }
    
    .faq-question {
      cursor: pointer;
      padding: 1.25rem 0;
      display: flex;
      justify-content: space-between;
      align-items: center;
      color: var(--text-primary);
      font-weight: 600;
      font-size: 1.1rem;
    }
    
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
      color: var(--text-secondary);
      padding-right: 2rem;
    }
    
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding-bottom: 1.25rem;
    }
    
    .faq-item.active .faq-icon {
      transform: rotate(180deg);
      color: var(--cyan);
    }
    
    .faq-icon {
      transition: transform 0.3s, color 0.2s;
      color: var(--text-muted);
    }
    
    /* 移动端菜单 */
    @media (max-width: 767px) {
      .mobile-menu {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: rgba(11, 10, 26, 0.96);
        backdrop-filter: blur(20px);
        border-bottom: 1px solid var(--border-light);
        flex-direction: column;
        padding: 1.5rem;
        gap: 1.25rem;
        z-index: 100;
      }
      .mobile-menu.open {
        display: flex;
      }
    }
    
    .container-custom {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 1.5rem;
    }