/* roulang page: index */
:root {
      --color-primary: #0F766E;
      --color-primary-dark: #115E59;
      --color-accent: #0284C7;
      --color-bg: #F8FAFC;
      --color-text-title: #0F172A;
      --color-text-main: #334155;
      --color-text-sub: #64748B;
      --color-border: #E2E8F0;
    }
    body {
      color: var(--color-text-main);
      background-color: var(--color-bg);
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
      scroll-behavior: smooth;
    }
    .hero-bg {
      background-image: linear-gradient(135deg, rgba(15, 23, 42, 0.88), rgba(15, 118, 110, 0.82)), url('/assets/images/d5b0e54ae9a5cc7b.webp');
      background-size: cover;
      background-position: center;
    }
    .cta-banner-bg {
      background-image: linear-gradient(135deg, rgba(15, 118, 110, 0.95), rgba(2, 132, 199, 0.92)), url('/assets/images/6a3a57aa87efb279.webp');
      background-size: cover;
      background-position: center;
    }
    .metric-number {
      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
      font-feature-settings: "tnum";
    }
    .accordion-content {
      transition: max-height 0.3s ease-out, opacity 0.25s ease-out;
      max-height: 0;
      opacity: 0;
      overflow: hidden;
    }
    .accordion-content.open {
      max-height: 380px;
      opacity: 1;
    }