/* roulang page: index */
:root {
      --color-primary: #0F2942;
      --color-primary-dark: #0B1B2B;
      --color-accent: #0084FF;
      --color-accent-green: #00B67A;
      --color-text-main: #1E293B;
      --color-text-sub: #475569;
      --color-bg-light: #F8FAFC;
      --color-border: #E2E8F0;
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 14px;
      --shadow-soft: 0 4px 20px -2px rgba(15, 41, 66, 0.06);
      --shadow-hover: 0 12px 28px -4px rgba(15, 41, 66, 0.12);
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Source Han Sans CN", sans-serif;
      color: var(--color-text-main);
      background-color: var(--color-bg-light);
      line-height: 1.65;
    }
    .custom-card {
      background: #FFFFFF;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-soft);
      transition: all 0.25s ease-in-out;
    }
    .custom-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-3px);
    }
    .btn-brand-primary {
      background-color: var(--color-accent);
      color: #ffffff;
      padding: 0.65rem 1.4rem;
      border-radius: var(--radius-sm);
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: all 0.2s ease;
    }
    .btn-brand-primary:hover {
      background-color: #0070db;
      transform: translateY(-1px);
    }
    .btn-brand-ghost {
      border: 1px solid var(--color-border);
      color: var(--color-text-main);
      background-color: #ffffff;
      padding: 0.65rem 1.4rem;
      border-radius: var(--radius-sm);
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: all 0.2s ease;
    }
    .btn-brand-ghost:hover {
      border-color: var(--color-accent);
      color: var(--color-accent);
    }
    .badge-soft {
      display: inline-flex;
      align-items: center;
      padding: 0.25rem 0.65rem;
      border-radius: 9999px;
      font-size: 0.8rem;
      font-weight: 600;
      background: rgba(0, 132, 255, 0.08);
      color: var(--color-accent);
      border: 1px solid rgba(0, 132, 255, 0.2);
    }