/* roulang page: index */
:root {
      --primary-purple: #7B2FF7;
      --primary-cyan: #00F0FF;
      --bg-deep: #0A0E27;
      --card-bg: #131A33;
      --accent-orange: #FF6B35;
      --text-primary: #E8ECFF;
      --text-secondary: #8892B0;
      --border-glow: rgba(123, 47, 247, 0.25);
      --gradient-main: linear-gradient(135deg, #7B2FF7 0%, #00F0FF 100%);
      --shadow-card: 0 12px 32px rgba(0, 0, 0, 0.5);
      --shadow-hover: 0 20px 40px rgba(123, 47, 247, 0.35);
      --radius-lg: 24px;
      --radius-xl: 32px;
      --radius-btn: 50px;
      --font-title: 'Rajdhani', 'PingFang SC', 'Microsoft YaHei', sans-serif;
      --font-body: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    }

    * {
      box-sizing: border-box;
    }

    body {
      background-color: var(--bg-deep);
      color: var(--text-primary);
      font-family: var(--font-body);
      margin: 0;
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    h1, h2, h3, .font-title {
      font-family: var(--font-title);
      font-weight: 700;
      letter-spacing: -0.02em;
    }

    h1 {
      font-size: 3.5rem;
      line-height: 1.2;
    }

    h2 {
      font-size: 2.5rem;
      margin-bottom: 1rem;
    }

    h3 {
      font-size: 1.6rem;
      font-weight: 600;
    }

    .text-gradient {
      background: var(--gradient-main);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .bg-gradient-main {
      background: var(--gradient-main);
    }

    .btn-primary-custom {
      background: var(--gradient-main);
      border: none;
      border-radius: var(--radius-btn);
      padding: 0.8rem 2.2rem;
      font-weight: 600;
      color: #fff;
      transition: all 0.3s ease;
      box-shadow: 0 8px 20px rgba(123, 47, 247, 0.5);
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }

    .btn-primary-custom:hover {
      filter: brightness(1.2);
      transform: scale(1.03);
      box-shadow: 0 12px 28px rgba(0, 240, 255, 0.55);
      color: white;
    }

    .btn-outline-custom {
      background: transparent;
      border: 1.5px solid rgba(123, 47, 247, 0.65);
      border-radius: var(--radius-btn);
      padding: 0.8rem 2.2rem;
      font-weight: 600;
      color: var(--text-primary);
      transition: all 0.3s ease;
      backdrop-filter: blur(6px);
    }

    .btn-outline-custom:hover {
      background: var(--gradient-main);
      border-color: transparent;
      color: white;
      transform: translateY(-2px);
      box-shadow: 0 8px 22px rgba(0, 240, 255, 0.4);
    }

    .card-custom {
      background: var(--card-bg);
      border-radius: var(--radius-lg);
      padding: 2rem;
      border: 1px solid var(--border-glow);
      box-shadow: var(--shadow-card);
      transition: all 0.3s ease;
      height: 100%;
    }

    .card-custom:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
      border-color: var(--primary-cyan);
    }

    .badge-custom {
      background: rgba(0, 240, 255, 0.12);
      color: var(--primary-cyan);
      border-radius: 30px;
      padding: 0.25rem 1rem;
      font-size: 0.8rem;
      font-weight: 600;
      border: 1px solid rgba(0, 240, 255, 0.25);
    }

    .metric-number {
      font-family: var(--font-title);
      font-size: 3.2rem;
      font-weight: 700;
      background: linear-gradient(180deg, #FFFFFF 0%, #00F0FF 90%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    /* 导航胶囊 */
    .navbar-capsule {
      background: rgba(10, 14, 39, 0.8);
      backdrop-filter: blur(18px);
      border-radius: 60px;
      padding: 0.5rem 2rem;
      border: 1px solid rgba(123, 47, 247, 0.35);
      max-width: 720px;
      margin: 1.2rem auto 0;
      box-shadow: 0 10px 30px rgba(0,0,0,0.7);
      z-index: 1050;
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
    }

    .nav-link-custom {
      color: var(--text-primary);
      font-weight: 500;
      font-size: 0.9rem;
      margin: 0 0.2rem;
      padding: 0.5rem 1rem !important;
      transition: 0.25s;
      border-radius: 30px;
      white-space: nowrap;
    }

    .nav-link-custom:hover,
    .nav-link-custom.active {
      color: var(--primary-cyan);
      background: rgba(0, 240, 255, 0.08);
      border-bottom: 2px solid var(--primary-cyan);
    }

    .faq-item {
      background: var(--card-bg);
      border-radius: 20px;
      margin-bottom: 1rem;
      border: 1px solid var(--border-glow);
      transition: all 0.25s;
    }

    .faq-button {
      background: transparent;
      border: none;
      color: var(--text-primary);
      font-weight: 600;
      font-size: 1.1rem;
      padding: 1.2rem 1.8rem;
      width: 100%;
      text-align: left;
      display: flex;
      align-items: center;
      gap: 0.8rem;
    }

    .faq-button:hover {
      color: var(--primary-cyan);
    }

    .faq-collapse {
      border-left: 3px solid var(--primary-purple);
      margin-left: 1rem;
      padding-left: 1.5rem;
      color: var(--text-secondary);
    }

    .process-step {
      font-family: var(--font-title);
      font-size: 3rem;
      font-weight: 700;
      color: rgba(0, 240, 255, 0.25);
    }

    @media (max-width: 768px) {
      h1 {
        font-size: 2.4rem;
      }
      h2 {
        font-size: 2rem;
      }
      .navbar-capsule {
        border-radius: 40px;
        padding: 0.3rem 1rem;
        max-width: 95%;
      }
      .metric-number {
        font-size: 2.4rem;
      }
      .card-custom {
        padding: 1.5rem;
      }
      .mobile-bottom-nav {
        position: fixed;
        bottom: 12px;
        left: 50%;
        transform: translateX(-50%);
        background: rgba(10,14,39,0.9);
        backdrop-filter: blur(20px);
        border-radius: 50px;
        padding: 0.6rem 1.5rem;
        display: flex;
        gap: 0.8rem;
        border: 1px solid var(--border-glow);
        z-index: 1060;
        width: fit-content;
      }
    }