/* roulang page: index */
:root {
      --primary: #0F4C5C;
      --navy: #1B2A4A;
      --cyan: #00B4D8;
      --amber: #FB8500;
      --carbon: #0B1320;
      --bg: #F8FAFC;
    }
    body {
      background-color: var(--bg);
      color: #1E293B;
      font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
      overflow-x: hidden;
    }
    /* 卡片堆叠交互视觉 */
    .hero-card-stack {
      perspective: 1000px;
    }
    .hero-subcard-left {
      transform: rotate(-3deg) translate(-20px, 20px) scale(0.95);
      transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .hero-subcard-right {
      transform: rotate(3deg) translate(20px, 35px) scale(0.95);
      transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .hero-card-stack:hover .hero-subcard-left {
      transform: rotate(-5deg) translate(-35px, 15px) scale(0.96);
    }
    .hero-card-stack:hover .hero-subcard-right {
      transform: rotate(5deg) translate(35px, 30px) scale(0.96);
    }
    .glass-panel {
      background: rgba(255, 255, 255, 0.88);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid rgba(226, 232, 240, 0.8);
    }
    .glass-carbon {
      background: rgba(11, 19, 32, 0.85);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid rgba(255, 255, 255, 0.08);
    }