/* roulang page: index */
:root {
      --primary: #6366F1;
      --secondary: #06B6D4;
      --accent: #EC4899;
      --bg-light: #FAFAFC;
      --bg-dark: #0A0D14;
      --text-main: #111318;
      --text-muted: #4A5060;
      --border-color: #E6E9F0;
      --card-radius: 1rem;
      --shadow-soft: 0 10px 30px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.03);
      --shadow-hover: 0 20px 35px -5px rgba(99, 102, 241, 0.12), 0 10px 15px -5px rgba(0, 0, 0, 0.04);
    }

    body {
      background-color: var(--bg-light);
      color: var(--text-main);
      overflow-x: hidden;
      font-feature-settings: "cv02", "cv03", "cv04", "cv11";
    }

    /* 斜切色块英雄区背景 */
    .hero-skew-bg {
      clip-path: polygon(0 0, 100% 0, 100% 86%, 0 100%);
    }

    @media (max-width: 768px) {
      .hero-skew-bg {
        clip-path: polygon(0 0, 100% 0, 100% 93%, 0 100%);
      }
    }

    .glass-card {
      background: rgba(255, 255, 255, 0.85);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid rgba(255, 255, 255, 0.4);
    }

    .glass-card-dark {
      background: rgba(17, 22, 34, 0.75);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid rgba(255, 255, 255, 0.08);
    }

    .card-transition {
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }

    .card-transition:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }

    /* 文本渐变 */
    .text-gradient {
      background: linear-gradient(135deg, #6366F1 0%, #06B6D4 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    
    .text-gradient-alt {
      background: linear-gradient(135deg, #EC4899 0%, #6366F1 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    /* 手风琴动效 */
    .faq-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease-out;
    }
    .faq-active .faq-content {
      max-height: 280px;
    }
    .faq-active .faq-icon {
      transform: rotate(180deg);
    }