/* roulang page: index */
:root {
      --primary: #0D7C3B;
      --primary-dark: #0A5E2D;
      --accent: #F15A24;
      --accent-dark: #D94A1A;
      --bg-light: #F4F7F5;
      --bg-dark: #0A2E1A;
      --text-main: #1A1A1A;
      --text-secondary: #5C6B63;
      --text-light: #B8C9BF;
      --border-soft: #DDE5DF;
      --card-shadow: 0 8px 30px rgba(13, 124, 59, 0.08);
      --card-shadow-hover: 0 16px 40px rgba(13, 124, 59, 0.15);
      --glass-bg: rgba(10, 46, 26, 0.75);
      --radius-card: 20px;
      --radius-btn: 14px;
      --radius-badge: 10px;
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', system-ui, -apple-system, sans-serif;
      --font-mono: 'Inter', 'SF Mono', 'Fira Code', monospace;
      --transition-smooth: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1.2);
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-light);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      scroll-behavior: smooth;
    }

    .font-mono {
      font-family: var(--font-mono);
      font-feature-settings: "tnum";
    }

    .container {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 导航系统 */
    .nav-transparent {
      background: transparent;
      backdrop-filter: blur(8px);
      transition: var(--transition-smooth);
    }
    .nav-solid {
      background: rgba(255,255,255,0.95);
      backdrop-filter: blur(20px);
      box-shadow: 0 4px 20px rgba(0,0,0,0.04);
      border-bottom: 1px solid rgba(13,124,59,0.08);
    }
    .nav-link {
      position: relative;
      font-weight: 500;
      transition: color 0.25s;
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 0%;
      height: 2px;
      background: var(--primary);
      transition: width 0.3s ease;
    }
    .nav-link:hover::after {
      width: 100%;
    }
    .mobile-menu {
      transition: max-height 0.4s ease, opacity 0.3s;
    }

    /* 自定义卡片与按钮 */
    .card-hover {
      transition: var(--transition-smooth);
      border: 1px solid var(--border-soft);
      background: white;
    }
    .card-hover:hover {
      transform: translateY(-6px);
      box-shadow: var(--card-shadow-hover);
      border-color: var(--primary);
    }
    .btn-primary {
      background: var(--primary);
      color: white;
      border-radius: var(--radius-btn);
      padding: 14px 36px;
      font-weight: 600;
      transition: var(--transition-smooth);
      box-shadow: 0 6px 18px rgba(13,124,59,0.3);
      border: none;
      cursor: pointer;
    }
    .btn-primary:hover {
      background: var(--primary-dark);
      transform: translateY(-3px);
      box-shadow: 0 14px 28px rgba(13,124,59,0.35);
    }
    .btn-ghost {
      background: transparent;
      border: 2px solid var(--primary);
      color: var(--primary);
      border-radius: var(--radius-btn);
      padding: 14px 36px;
      font-weight: 600;
      transition: var(--transition-smooth);
    }
    .btn-ghost:hover {
      background: var(--primary);
      color: white;
      transform: translateY(-2px);
    }
    .btn-accent {
      background: var(--accent);
      color: white;
      border-radius: var(--radius-btn);
      padding: 14px 36px;
      font-weight: 700;
      transition: var(--transition-smooth);
      box-shadow: 0 8px 20px rgba(241,90,36,0.35);
    }
    .btn-accent:hover {
      background: var(--accent-dark);
      transform: translateY(-3px);
    }

    /* 数字动画风格 */
    .stat-number {
      font-family: var(--font-mono);
      font-weight: 700;
      color: var(--accent);
      font-size: 2.5rem;
      line-height: 1.2;
    }
    .pulse-dot {
      display: inline-block;
      width: 10px;
      height: 10px;
      background: #FF4D4D;
      border-radius: 50%;
      animation: pulse 1.6s infinite;
      margin-right: 6px;
    }
    @keyframes pulse {
      0% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.6; transform: scale(1.2); }
      100% { opacity: 1; transform: scale(1); }
    }

    /* 进度条 */
    .progress-bar {
      height: 6px;
      background: #E0E7E3;
      border-radius: 6px;
      overflow: hidden;
    }
    .progress-fill {
      width: 68%;
      height: 100%;
      background: var(--primary);
      border-radius: 6px;
    }

    /* FAQ 手风琴 */
    .faq-item {
      border: 1px solid var(--border-soft);
      border-radius: 16px;
      margin-bottom: 12px;
      background: white;
      transition: all 0.25s;
    }
    .faq-item.active {
      border-color: var(--primary);
      box-shadow: 0 6px 18px rgba(13,124,59,0.08);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease;
    }

    /* 横向滚动卡片隐藏滚动条 */
    .scroll-container {
      scrollbar-width: thin;
      scrollbar-color: var(--primary) #E0E7E3;
    }
    .scroll-container::-webkit-scrollbar {
      height: 4px;
    }
    .scroll-container::-webkit-scrollbar-thumb {
      background: var(--primary);
      border-radius: 10px;
    }

    @media (max-width: 768px) {
      .container {
        padding-left: 20px;
        padding-right: 20px;
      }
    }